Commit Graph

10839 Commits

Author SHA1 Message Date
Adhemerval Zanella
50a6b4e0e4 Use shmget syscall for linux implementation
this patch add a direct call to shmget syscall if it is supported by
kernel features.

Checked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (shmget): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (shmget): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (shmget): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (shmget): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (shmget): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmget): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmget):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmget):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmget): Likewise.
	* sysdeps/unix/sysv/linux/shmget.c (shmget): Use shmget syscall if it
	is defined.
2016-12-28 20:31:05 -02:00
Adhemerval Zanella
214f017fdf Use shmdt syscall for linux implementation
this patch add a direct call to shmdt syscall if it is supported by
kernel features.

hecked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (shmdt): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmdt):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmdt):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/shmdt.c (shmdt): Use shmdt syscall if it is
	defined.
2016-12-28 20:31:05 -02:00
Adhemerval Zanella
e01f79e412 Consolidate Linux shmctl implementation
This patch consolidates the shmctl Linux implementation in only
one default file, sysdeps/unix/sysv/linux/shmctl.c.  If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.

The patch also simplify header inclusion and reorganize internal
compat symbol to be built only if old ipc is defined.

Checked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines): Remove
	oldshmctl.
	* sysdeps/unix/sysv/linux/alpha/syscalls.list (shmctl): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmctl):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmctl):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmctl): Likewise.
	* sysdeps/unix/sysv/linux/alpha/shmctl.c: Remove file.
	* sysdeps/unix/sysv/linux/arm/shmctl.c: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/shmctl.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/shmctl.c: Use default
	implementation.
	* sysdeps/unix/sysv/linux/shmctl.c (__new_shmctl): Use shmctl syscall
	if it is defined.
2016-12-28 20:31:05 -02:00
Adhemerval Zanella
8232e7d209 Use shmat syscall for Linux implementation
This patch add a direct call to shmat syscall if it is supported by
kernel features.

Checked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (shmat): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (shmat): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (shmat): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (shmat): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (shmat): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmat): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmat):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmat):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmat): Likewise.
	* sysdeps/unix/sysv/linux/alpha/kernel-features.h (__NR_shmat):
	Define to __NR_osf_shmat.
	* sysdeps/unix/sysv/linux/shmat.c (shmat): Use shmat syscall if it is
	defined.
2016-12-28 20:31:05 -02:00
Adhemerval Zanella
38cee35b0c Consolidate Linux semtimedop implementation
This patch consolidates the semtimedop Linux implementation in only
one default file, sysdeps/unix/sysv/linux/semtimedop.c.  If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.

Checked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (semtimedop): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (semtimedop): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (semtimedop):
	Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (semtimedop): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (semtimedop): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (semtimedop):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (semtimedop):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (semtimedop): Likewise.
	* sysdeps/unix/sysv/linux/m68k/semtimedop.S: Remove file.
	* sysdeps/unix/sysv/linux/s390/semtimedop.c: Reorganize headers and
	add a comment about s390 syscall difference from default one.
	* sysdeps/unix/sysv/linux/semtimedop.c (semtimedop): Use semtimedop
	syscall if it is defined.
2016-12-28 20:31:04 -02:00
Adhemerval Zanella
0f97184020 Use semop syscall for Linux implementation
This patch add a direct call to semop syscall if it is supported by
kernel headers.

Checked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (semop): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (semop): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (semop): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (semop): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (semop): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (semop): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (semop):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (semop):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (semop): Likewise.
	* sysdeps/unix/sysv/linux/semop.c (semop): Use semop syscall if it is
	defined.
2016-12-28 20:31:04 -02:00
Adhemerval Zanella
d29f6bcdcc Use semget syscall for Linux implementation
This patch add a direct call to semget syscall if it is supported by
kernel features.

hecked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (semget): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (semget): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (semget): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (semget): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (semget): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (semget): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (semget):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (semget):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (semget): Likewise.
	* sysdeps/unix/sysv/linux/semget.c (semget): Use semget syscall
	if it is defined.
2016-12-28 20:31:04 -02:00
Adhemerval Zanella
40c0a78068 Consolidate Linux semctl implementation
This patch consolidates the semctl Linux implementation in only
one default file, sysdeps/unix/sysv/linux/semctl.c.  If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.

The patch also simplify header inclusion and reorganize internal
compat symbol to be built only if old ipc is defined.

Checked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines): Remove
	oldsemctl.
	* sysdeps/unix/sysv/linux/alpha/semctl.c: Remove file.
	* sysdeps/unix/sysv/linux/arm/semctl.c: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/semctl.c: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/semctl.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/semctl.c: Use defaulf
	implementation.
	* sysdeps/unix/sysv/linux/semctl.c (__new_semctl): Use semctl
	syscall if it is defined.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (semctl): Remove.
	* sysdeps/unix/sysv/linux/alpha/syscalls.list (semctl): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (semctl): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (semctl): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (semctl):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (semctl): Likewise.
2016-12-28 20:31:04 -02:00
Adhemerval Zanella
2182a151a7 Use msgget syscall for Linux implementation
This patch add a direct call to msgget syscall if it is supported by
kernel features.

hecked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (msgget): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (msgget): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (msgget): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgget): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgget): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (msgget): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (msgget):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgget):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgget): Likewise.
	* sysdeps/unix/sysv/linux/msgget.c (msgget): Use msgget syscall if
	define.
2016-12-28 20:28:56 -02:00
Adhemerval Zanella
692fe43ae2 Use msgsnd syscall for Linux implementation
This patch add a direct call to msgsnd syscall if it is supported by
kernel features.

hecked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (msgsnd): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (msgsnd):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgsnd):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgsnd): Likewise.
	* sysdeps/unix/sysv/linux/msgsnd.c (__libc_msgsnd): Use msgsnd syscall
	if defined.
2016-12-28 20:28:56 -02:00
Adhemerval Zanella
dee23189ae Consolidate Linux msgrcv implementation
This patch consolidates the msgrcv Linux implementation in only
one default file, sysdeps/unix/sysv/linux/msgrcv.c.  If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.

Checked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (msgctl): Remove.
	* sysdeps/unix/sysv/linux/arm/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgctl):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgctl): Likewise,
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (msgctl):
	Likewise.
	* sysdeps/unix/sysv/linux/msgrcv.c (__libc_msgrcv): Use msgrcv syscall
	if defined.
	* sysdeps/unix/sysv/linux/sparc/sparc64/msgrcv.c: Remove file.
2016-12-28 20:28:56 -02:00
Adhemerval Zanella
356c0aabd0 Consolidate Linux msgctl implementation
This patch consolidates the msgctl Linux implementation in only
one default file, sysdeps/unix/sysv/linux/msgctl.c.  If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.

The patch also simplify header inclusion and reorganize internal
compat symbol to be built only if old ipc is defined.

Checked on x86_64, i686, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines): Remove
	oldmsgctl.
	* sysdeps/unix/sysv/linux/alpha/msgctl.c: Remove file.
	* sysdeps/unix/sysv/linux/arm/msgctl.c: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/msgctl.c: Likewise.
	* sysdeps/unix/sysv/linux/alpha/syscalls.list (oldmsgctl): Remove.
	* sysdeps/unix/sysv/linux/generic/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgctl):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgctl): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/msgctl.c: Use default
	implementation.
	* sysdeps/unix/sysv/linux/msgctl.c (__new_msgctl): Use msgctl syscall
	if defined.
2016-12-28 20:28:56 -02:00
Adhemerval Zanella
1e5834c38a Refactor Linux ipc_priv header
Some architectures support the old-style IPC and require IPC_64 equal to
0x100 to be passed along SysV IPC syscalls, while new architectures should
default to new IPC version (without the flags being set).

This patch refactor current ipc_priv.h Linux headers in two directions:

- Remove cross platform references (for instance alpha including powerpc
  definition) and add required definition for each required port.  The
  idea is to avoid tie one architecture definition with another and make
  platform change independent.

- Move all common definitions (the ipc syscall commands) on a common
  header, ipc_ops.h.

	* sysdeps/unix/sysv/linux/aarch64/ipc_priv.h: New file.
	* sysdeps/unix/sysv/linux/alpha/ipc_priv.h: Avoid included other arch
	definition and define its own.
	* sysdeps/unix/sysv/linux/ipc_ops.h: New file.
	* sysdeps/unix/sysv/linux/x86_64/ipc_priv.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/ipc_priv.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/ipc_priv.h: Remove file.
	* sysdeps/unix/sysv/linux/mips/mips64/ipc_priv.h: New file.
	* sysdeps/unix/sysv/linux/ipc_priv.h: Move ipc syscall operation
	definitions to common header.
	* sysdeps/unix/sysv/linux/powerpc/ipc_priv.h: Use common syscall
	operation from ipc_ops.h.
2016-12-28 20:28:56 -02:00
Adhemerval Zanella
63719cf1e3 Add __ASSUME_DIRECT_SYSVIPC_SYSCALL for Linux
On current minimum supported kernels, the SysV IPC on Linux is provided
by either the ipc syscalls or correspondent wire syscalls.  Also, for
architectures that supports wire syscalls all syscalls are supported
in a set (msgct, msgrcv, msgsnd, msgget, semctl, semget, semop, semtimedop,
shmctl, shmat, shmget, shmdt).

The architectures that only supports ipc syscall are:

  - i386, m68k, microblaze, mips32, powerpc (powerpc32, powerpc64, and
    powerpc64le), s390 (32 and 64 bits), sh, sparc32, and sparc64.

And the architectures that only supports wired syscalls are:

  - aarch64, alpha, hppa, ia64, mips64, mips64n32, nios2, tile
    (tilepro, tilegx, and tilegx64), and x86_64

Also arm is the only one that supports both wire syscalls and the
ipc, although the ipc one is deprecated.

This patch adds a new define, __ASSUME_DIRECT_SYSVIPC_SYSCALL, that wired
syscalls are supported on the system and the general idea is to use
it where possible.

I also checked the syscall table for all architectures on Linux 4.9
and there is no change on described support for Linux 2.6.32/3.2.

	* sysdeps/unix/sysv/linux/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALL): New define.
	* sysdeps/unix/sysv/linux/i386/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Undef.
	* sysdeps/unix/sysv/linux/m68k/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/mips/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/s390/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/sh/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/sparc/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
2016-12-28 20:28:56 -02:00
Tulio Magno Quites Machado Filho
5e628dd118 powerpc: Fix powerpc32/power7 memchr for large input sizes
The same error fixed in commit b224637928
happens in the 32-bit implementation of memchr for power7.

This patch adopts the same solution, with a minimal change: it
implements a saturated addition where overflows sets the maximum pointer
size to UINTPTR_MAX.
2016-12-28 11:44:31 -02:00
Rajalakshmi Srinivasaraghavan
9314d3545e powerpc64: strchr/strchrnul optimization for power8
The P7 code is used for <=32B strings and for > 32B vectorized loops are used.
This shows as an average 25% improvement depending on the position of search
character.  The performance is same for shorter strings.
Tested on ppc64 and ppc64le.
2016-12-28 11:44:31 -02:00
Dmitry V. Levin
12f1ae05c0 Fix typos in the spelling of "implementation"
Apply the following spelling fix:
$ git grep -El 'implemetn?ation' |
  xargs sed -ri 's/implemetn?ation/implementation/g'

[BZ #19514]
* resolv/res_send.c: Fix typo in comment.
* sysdeps/i386/i386-mcount.S: Likewise.
* sysdeps/s390/s390-32/s390-mcount.S: Likewise.
* sysdeps/s390/s390-64/s390x-mcount.S: Likewise.
* sysdeps/sparc/sparc-mcount.S: Likewise.
2016-12-27 20:13:35 +00:00
Adhemerval Zanella
cfee7d9cf4 powerpc: Remove f{max,min}{f} assembly implementations
This patch removes the powerpc assembly implementation of fmax/fmin.
Based on benchtests, the assembly ones shows:

$ ./testrun.sh benchtests/bench-fmax
  "fmax": {
   "": {
    "duration": 5.07586e+09,
    "iterations": 2.01676e+09,
    "max": 1350.39,
    "min": 2.073,
    "mean": 2.51684
   },
   "qNaN": {
    "duration": 5.09315e+09,
    "iterations": 8.4568e+08,
    "max": 2788,
    "min": 5.806,
    "mean": 6.02255
   },
   "sNaN": {
    "duration": 5.09073e+09,
    "iterations": 8.42316e+08,
    "max": 4215.84,
    "min": 5.737,
    "mean": 6.04373
   }

And

$ ./testrun.sh benchtests/bench-fmin
  "fmin": {
   "": {
    "duration": 5.07711e+09,
    "iterations": 2.02982e+09,
    "max": 497.094,
    "min": 2.073,
    "mean": 2.50126
   },
   "qNaN": {
    "duration": 5.09134e+09,
    "iterations": 8.46968e+08,
    "max": 2255.14,
    "min": 5.807,
    "mean": 6.01125
   },
   "sNaN": {
    "duration": 5.09122e+09,
    "iterations": 8.4746e+08,
    "max": 1969.38,
    "min": 5.729,
    "mean": 6.00763
   }
  }

The default implementation (math/s_f{max.min}_template.c) shows slight better
latency for all cases:

$ ./testrun.sh benchtests/bench-fmax
  "fmax": {
   "": {
    "duration": 5.07044e+09,
    "iterations": 2.38695e+09,
    "max": 2048.58,
    "min": 2.073,
    "mean": 2.12423
   },
   "qNaN": {
    "duration": 5.09004e+09,
    "iterations": 9.45428e+08,
    "max": 3306.93,
    "min": 5.138,
    "mean": 5.38385
   },
   "sNaN": {
    "duration": 5.08458e+09,
    "iterations": 1.15959e+09,
    "max": 972.008,
    "min": 3.321,
    "mean": 4.3848
   }
  }

And:

$ ./testrun.sh benchtests/bench-fmin
  "fmin": {
   "": {
    "duration": 5.06817e+09,
    "iterations": 2.3913e+09,
    "max": 1177.9,
    "min": 2.073,
    "mean": 2.11942
   },
   "qNaN": {
    "duration": 5.08857e+09,
    "iterations": 9.45656e+08,
    "max": 2658.83,
    "min": 5.09,
    "mean": 5.38099
   },
   "sNaN": {
    "duration": 5.08093e+09,
    "iterations": 1.16725e+09,
    "max": 1030.74,
    "min": 3.323,
    "mean": 4.3529
   }
  }

Both were run with GCC 5.4 (ubuntu 16 default installation) using default
compiler flags on POWER8E 3.4GHz (powerpc64le-linux-gnu).
2016-12-27 17:42:09 -02:00
Adhemerval Zanella
3daef2c8ee Fix x86_64 memchr for large input sizes
Current optimized memchr for x86_64 does for input arguments pointers
module 64 in range of [49,63] if there is no searchr char in the rest
of 64-byte block a pointer addition which might overflow:

* sysdeps/x86_64/memchr.S

    77          .p2align 4
    78  L(unaligned_no_match):
    79          add     %rcx, %rdx

Add (uintptr_t)s % 16 to n in %rdx.

    80          sub     $16, %rdx
    81          jbe     L(return_null)

This patch fixes by adding a saturated math that sets a maximum pointer
value if it overflows (UINTPTR_MAX).

Checked on x86_64-linux-gnu and powerpc64-linux-gnu.

	[BZ# 19387]
	* sysdeps/x86_64/memchr.S (memchr): Avoid overflow in pointer
	addition.
	* string/test-memchr.c (do_test): Remove alignment limitation.
	(test_main): Add test that trigger BZ# 19387.
2016-12-27 10:50:41 -02:00
Nick Alcock
2e6c45c59b Do not stack-protect sigreturn stubs [BZ #7065]
These are called from the kernel with the stack at a carefully-
chosen location so that the stack frame can be restored: they must not
move the stack pointer lest garbage be restored into the registers.

We explicitly inhibit protection for SPARC and for signal/sigreturn.c:
other arches either define their sigreturn stubs in .S files, or (i386,
x86_64, mips) use macros expanding to top-level asm blocks and explicit
labels in the text section to mock up a "function" without telling the
compiler that one is there at all.
2016-12-26 10:11:06 +01:00
Nick Alcock
524a8ef2ad PLT avoidance for __stack_chk_fail [BZ #7065]
Add a hidden __stack_chk_fail_local alias to libc.so,
and make sure that on targets which use __stack_chk_fail,
this does not introduce a local PLT reference into libc.so.
2016-12-26 10:11:05 +01:00
Nick Alcock
995635f95b Compile the dynamic linker without stack protection [BZ #7065]
Also compile corresponding routines in the static libc.a with the same
flag.
2016-12-26 10:08:48 +01:00
Nick Alcock
de6591238b Do not stack-protect ifunc resolvers [BZ #7065]
When dynamically linking, ifunc resolvers are called before TLS is
initialized, so they cannot be safely stack-protected.

We avoid disabling stack-protection on large numbers of files by
using __attribute__ ((__optimize__ ("-fno-stack-protector")))
to turn it off just for the resolvers themselves.  (We provide
the attribute even when statically linking, because we will later
use it elsewhere too.)
2016-12-26 10:08:41 +01:00
Nick Alcock
003a27e819 Initialize the stack guard earlier when linking statically [BZ #7065]
The address of the stack canary is stored in a per-thread variable,
which means that we must ensure that the TLS area is intialized before
calling any -fstack-protector'ed functions.  For dynamically linked
applications, we ensure this (in a later patch) by disabling
-fstack-protector for the whole dynamic linker, but for static
applications, the AT_ENTRY address is called directly by the kernel, so
we must deal with the problem differently.

In static appliations, __libc_setup_tls performs the TCB setup and TLS
initialization, so this commit arranges for it to be called early and
unconditionally.  The call (and the stack guard initialization) is
before the DL_SYSDEP_OSCHECK hook, which if set will probably call
functions which are stack-protected (it does on Linux and NaCL too).  We
also move apply_irel up, so that we can still safely call functions that
require ifuncs while in __libc_setup_tls (though if stack-protection is
enabled we still have to avoid calling functions that are not
stack-protected at this stage).
2016-12-26 10:08:34 +01:00
Wilco Dijkstra
5625f666ce This patch cleans up the strsep implementation and improves performance.
Currently strsep calls strpbrk is is now a veneer to strcspn.  Calling
strcspn directly is faster.  Since it handles a delimiter string of size
1 as a special case, this is not needed in strsep itself.  Although this
means there is a slightly higher overhead if the delimiter size is 1,
all other cases are slightly faster.  The overall performance gain is 5-10%
on AArch64.

The string/bits/string2.h header contains optimizations for constant
delimiters of size 1-3.  Benchmarking these showed similar performance for
size 1 (since in all cases strchr/strchrnul is used), while size 2 and 3
can give up to 2x speedup for small input strings.  However if these cases
are common it seems much better to add this optimization to strcspn.
So move these header optimizations to string-inlines.c.

Improve the strsep benchmark so that it actually benchmarks something.
The current version contains a delimiter character at every position in the
input string, so there is very little work to do, and the extremely inefficent
simple_strsep implementation appears fastest in every case.  The new version
has either no match in the input for the fail case and a match halfway in the
input for the success case.  The input is then restored so that each iteration
does exactly the same amount of work.  Reduce the number of testcases since
simple_strsep takes a lot of time now.

	* benchtests/bench-strsep.c (oldstrsep): Add old implementation.
	(do_one_test) Restore original string so iteration works.
	* string/string-inlines.c (do_test): Create better input strings.
	(test_main) Reduce number of testruns.
	* string/string-inlines.c (__old_strsep_1c): New function.
	(__old_strsep_2c): Likewise.
	(__old_strsep_3c): Likewise.
	* string/strsep.c (__strsep): Remove case of small delim string.
	Call strcspn directly rather than strpbrk.
	* string/bits/string2.h (__strsep): Remove define.
	(__strsep_1c): Remove.
	(__strsep_2c): Remove.
	(__strsep_3c): Remove.
	(strsep): Remove.
	* sysdeps/unix/sysv/linux/internal_statvfs.c
	(__statvfs_getflags): Rename to __strsep.
2016-12-21 15:16:29 +00:00
Florian Weimer
d08ab9ced7 Remove unused function _dl_tls_setup
Commit 7a5e3d9d63 (elf: Assume TLS is
initialized in _dl_map_object_from_fd) removed the last call of
_dl_tls_setup, but did not remove the function itself.
2016-12-21 14:30:56 +01:00
Nick Alcock
fcd942370f x86_64: tst-quad1pie, tst-quad2pie: compile with -fPIE [BZ #7065]
With stack protection enabled, these files have external symbol
references for the first time, so the fact that they are not compiled
with -fPIE and are then linked into a -pie binary starts to hurt.
2016-12-21 12:04:12 +01:00
Joseph Myers
41c67149b9 Add roundeven, roundevenf, roundevenl.
TS 18661-1 defines roundeven functions that round a floating-point
number to the nearest integer, in that floating-point type, with ties
rounding to even (whereas the round functions round ties away from
zero).  As with other such functions, they raise no exceptions apart
from "invalid" for signaling NaNs.  There was a previous user request
for this functionality in glibc in
<https://sourceware.org/ml/libc-help/2015-02/msg00005.html>.

This patch implements these functions for glibc.  The implementations
use integer bit-manipulation (or roundeven on the high and low parts,
in the IBM long double case).  It's possible that there may be faster
approaches on some architectures (in particular, on AArch64 the frintn
instruction should do exactly what's required); I'll leave it to
architecture maintainers or others interested to implement such
architecture-specific versions if desired.  (Where architectures have
instructions to round to nearest integer in the current rounding mode,
implementations saving and restoring the rounding mode - and dealing
with exceptions if those instructions generate "inexact" - are also
possible, though their performance depends on the cost of manipulating
exceptions / rounding mode state.)

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(roundeven): New declaration.
	* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (roundeven): New
	macro.
	* math/Versions (roundeven): New libm symbol at version
	GLIBC_2.25.
	(roundevenf): Likewise.
	(roundevenl): Likewise.
	* math/Makefile (libm-calls): Add s_roundevenF.
	* math/libm-test.inc (roundeven_test_data): New array.
	(roundeven_test): New function.
	(main): Call roundeven_test.
	* math/test-tgmath.c (NCALLS): Increase to 134.
	(F(compile_test)): Call roundeven.
	(F(roundeven)): New function.
	* manual/arith.texi (Rounding Functions): Document roundeven,
	roundevenf and roundevenl.
	* manual/libm-err-tab.pl (@all_functions): Add roundeven.
	* include/math.h (roundeven): Use libm_hidden_proto.
	* sysdeps/ieee754/dbl-64/s_roundeven.c: New file.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_roundeven.c: Likewise.
	* sysdeps/ieee754/flt-32/s_roundevenf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_roundevenl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_roundevenl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_roundevenl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
	roundeven.
	(CFLAGS-nldbl-roundeven.c): New variable.
	* sysdeps/ieee754/ldbl-opt/nldbl-roundeven.c: New file.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-12-21 01:48:27 +00:00
Stefan Liebler
dd037fb3df S390: Optimize lock-elision by decrementing adapt_count at unlock.
This patch decrements the adapt_count while unlocking the futex
instead of before aquiring the futex as it is done on power, too.
Furthermore a transaction is only started if the futex is currently free.
This check is done after starting the transaction, too.
If the futex is not free and the transaction nesting depth is one,
we can simply end the started transaction instead of aborting it.
The implementation of this check was faulty as it always ended the
started transaction.  By using the fallback path, the the outermost
transaction was aborted.  Now the outermost transaction is aborted
directly.

This patch also adds some commentary and aligns the code in
elision-trylock.c to the code in elision-lock.c as possible.

ChangeLog:

	* sysdeps/unix/sysv/linux/s390/lowlevellock.h
	(__lll_unlock_elision, lll_unlock_elision): Add adapt_count argument.
	* sysdeps/unix/sysv/linux/s390/elision-lock.c:
	(__lll_lock_elision): Decrement adapt_count while unlocking
	instead of before locking.
	* sysdeps/unix/sysv/linux/s390/elision-trylock.c
	(__lll_trylock_elision): Likewise.
	* sysdeps/unix/sysv/linux/s390/elision-unlock.c:
	(__lll_unlock_elision): Likewise.
2016-12-20 15:12:48 +01:00
Stefan Liebler
53c5c3d5ac S390: Use new __libc_tbegin_retry macro in elision-lock.c.
This patch implements __libc_tbegin_retry macro which is equivalent to
gcc builtin __builtin_tbegin_retry, except the changes which were applied
to __libc_tbegin in the previous patch.

If tbegin aborts with _HTM_TBEGIN_TRANSIENT.  Then this macros restores
the fpc, fprs and automatically retries up to retry_cnt tbegins.
Further saving of the state is omitted as it is already saved in the
first round.  Before retrying a further transaction, the
transaction-abort-assist instruction is used to support the cpu.

This macro is now used in function __lll_lock_elision.

ChangeLog:

	* sysdeps/unix/sysv/linux/s390/htm.h(__libc_tbegin_retry): New macro.
	* sysdeps/unix/sysv/linux/s390/elision-lock.c (__lll_lock_elision):
	Use __libc_tbegin_retry macro.
2016-12-20 15:12:48 +01:00
Stefan Liebler
8bfc4a2ab4 S390: Use own tbegin macro instead of __builtin_tbegin.
This patch defines __libc_tbegin, __libc_tend, __libc_tabort and
__libc_tx_nesting_depth in htm.h which replaces the direct usage of
equivalent gcc builtins.

We have to use an own inline assembly instead of __builtin_tbegin,
as tbegin has to filter program interruptions which can't be done with
the builtin.  Before this change, e.g. a segmentation fault within a
transaction, leads to a coredump where the instruction pointer points
behind the tbegin instruction instead of real failing one.
Now the transaction aborts and the code should be reexecuted by the
fallback path without transactions.  The segmentation fault will
produce a coredump with the real failing instruction.

The fpc is not saved before starting the transaction.  If e.g. the
rounging mode is changed and the transaction is aborting afterwards,
the builtin will not restore the fpc.  This is now done with the
__libc_tbegin macro.

Now the call saved fprs have to be saved / restored in the
__libc_tbegin macro.  Using the gcc builtin had forced the saving /
restoring of fprs at begin / end of e.g. __lll_lock_elision function.
The new macro saves these fprs before tbegin instruction and only
restores them on a transaction abort.  Restoring is not needed on
a successfully started transaction.

The used inline assembly does not clobber the fprs / vrs!
Clobbering the latter ones would force the compiler to save / restore
the call saved fprs as those overlap with the vrs, but they only
need to be restored if the transaction fails.  Thus the user of the
tbegin macros has to compile the file / function with -msoft-float.
It prevents gcc from using fprs / vrs.

ChangeLog:

	* sysdeps/unix/sysv/linux/s390/Makefile (elision-CFLAGS):
	Add -msoft-float.
	* sysdeps/unix/sysv/linux/s390/htm.h: New File.
	* sysdeps/unix/sysv/linux/s390/elision-lock.c:
	Use __libc_t* transaction macros instead of __builtin_t*.
	* sysdeps/unix/sysv/linux/s390/elision-trylock.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/elision-unlock.c: Likewise.
2016-12-20 15:12:48 +01:00
Stefan Liebler
c813dae5d8 S390: Use C11-like atomics instead of plain memory accesses in lock elision code.
This uses atomic operations to access lock elision metadata that is accessed
concurrently (ie, adapt_count fields).  The size of the data is less than a
word but accessed only with atomic loads and stores.

See also x86 commit ca6e601a9d:
"Use C11-like atomics instead of plain memory accesses in x86 lock elision."

ChangeLog:

	* sysdeps/unix/sysv/linux/s390/elision-lock.c
	(__lll_lock_elision): Use atomics to load / store adapt_count.
	* sysdeps/unix/sysv/linux/s390/elision-trylock.c
	(__lll_trylock_elision): Likewise.
2016-12-20 15:12:48 +01:00
Joseph Myers
525f803984 Add fmaxmag, fminmag functions.
TS 18661-1 defines fmaxmag and fminmag functions that return the
argument with maximum / minimum magnitude (acting like fmax / fmin if
the arguments have the same magnitude or either argument is a NaN).
These correspond to the IEEE 754-2008 operations maxNumMag and
minNumMag.  This patch implements these functions for glibc.  They are
implemented with type-generic templates.  Tests are based on those for
fmax and fmin.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(fmaxmag): New declaration.
	(fminmag): Likewise.
	* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (fmaxmag): New
	macro.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (fminmag): Likewise.
	* math/Versions (fmaxmag): New libm symbol at version GLIBC_2.25.
	(fmaxmagf): Likewise.
	(fmaxmagl): Likewise.
	(fminmag): Likewise.
	(fminmagf): Likewise.
	(fminmagl): Likewise.
	* math/Makefile (gen-libm-calls): Add s_fmaxmagF and s_fminmagF.
	* math/s_fmaxmag_template.c: New file.
	* math/s_fminmag_template.c: Likewise.
	* math/libm-test.inc (fmaxmag_test_data): New array.
	(fmaxmag_test): New function.
	(fminmag_test_data): New array.
	(fminmag_test): New function.
	(main): Call fmaxmag_test and fminmag_test.
	* math/test-tgmath.c (NCALLS): Increase to 132.
	(F(compile_test)): Call fmaxmag and fminmag.
	(F(fminmag)): New function.
	(F(fmaxmag)): Likewise.
	* manual/arith.texi (Misc FP Arithmetic): Document fminmag,
	fminmagf, fminmagl, fmaxmag, fmaxmagf and fmaxmagl.
	* manual/libm-err-tab.pl (@all_functions): Add fmaxmag and
	fminmag.
	* sysdeps/ieee754/ldbl-opt/nldbl-fmaxmag.c: New file.
	* sysdeps/ieee754/ldbl-opt/nldbl-fminmag.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/s_fmaxmagl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/s_fminmagl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fmaxmag
	and fminmag.
	(CFLAGS-nldbl-fmaxmag.c): New variable.
	(CFLAGS-nldbl-fminmag.c): Likewise.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-12-20 00:46:53 +00:00
Andrew Senkevich
2702856bf4 Disable TSX on some Haswell processors.
Patch disables Intel TSX on some Haswell processors to avoid TSX
on kernels that weren't updated with the latest microcode package
(which disables broken feature by default).

    * sysdeps/x86/cpu-features.c (get_common_indeces): Add
    stepping identification.
    (init_cpu_features): Add handle of Haswell.
2016-12-19 14:15:57 +03:00
Zack Weinberg
ea1bd74def New string function explicit_bzero (from OpenBSD).
explicit_bzero(s, n) is the same as memset(s, 0, n), except that the
compiler is not allowed to delete a call to explicit_bzero even if the
memory pointed to by 's' is dead after the call.  Right now, this effect
is achieved externally by having explicit_bzero be a function whose
semantics are unknown to the compiler, and internally, with a no-op
asm statement that clobbers memory.  This does mean that small
explicit_bzero operations cannot be expanded inline as small memset
operations can, but on the other hand, small memset operations do get
deleted by the compiler.  Hopefully full compiler support for
explicit_bzero will happen relatively soon.

There are two new tests: test-explicit_bzero.c verifies the
visible semantics in the same way as the existing test-bzero.c,
and tst-xbzero-opt.c verifies the not-being-optimized-out property.
The latter is conceptually based on a test written by Matthew Dempsky
for the OpenBSD regression suite.

The crypt() implementation has an immediate use for this new feature.
We avoid having to add a GLIBC_PRIVATE alias for explicit_bzero
by running all of libcrypt's calls through the fortified variant,
__explicit_bzero_chk, which is in the impl namespace anyway.  Currently
I'm not aware of anything in libc proper that needs this, but the
glue is all in place if it does become necessary.  The legacy DES
implementation wasn't bothering to clear its buffers, so I added that,
mostly for consistency's sake.

	* string/explicit_bzero.c: New routine.
	* string/test-explicit_bzero.c, string/tst-xbzero-opt.c: New tests.
	* string/Makefile (routines, strop-tests, tests): Add them.
	* string/test-memset.c: Add ifdeffage for testing explicit_bzero.
	* string/string.h [__USE_MISC]: Declare explicit_bzero.

	* debug/explicit_bzero_chk.c: New routine.
	* debug/Makefile (routines): Add it.
	* debug/tst-chk1.c: Test fortification of explicit_bzero.
	* string/bits/string3.h: Fortify explicit_bzero.

	* manual/string.texi: Document explicit_bzero.
	* NEWS: Mention addition of explicit_bzero.

	* crypt/crypt-entry.c (__crypt_r): Clear key-dependent intermediate
	data before returning, using explicit_bzero.
	* crypt/md5-crypt.c (__md5_crypt_r): Likewise.
	* crypt/sha256-crypt.c (__sha256_crypt_r): Likewise.
	* crypt/sha512-crypt.c (__sha512_crypt_r): Likewise.

	* include/string.h: Redirect internal uses of explicit_bzero
	to __explicit_bzero_chk[_internal].
	* string/Versions [GLIBC_2.25]: Add explicit_bzero.
	* debug/Versions [GLIBC_2.25]: Add __explicit_bzero_chk.
	* sysdeps/arm/nacl/libc.abilist
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist
	* sysdeps/unix/sysv/linux/alpha/libc.abilist
	* sysdeps/unix/sysv/linux/arm/libc.abilist
	* sysdeps/unix/sysv/linux/hppa/libc.abilist
	* sysdeps/unix/sysv/linux/i386/libc.abilist
	* sysdeps/unix/sysv/linux/ia64/libc.abilist
	* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
	* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
	* sysdeps/unix/sysv/linux/microblaze/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
	* sysdeps/unix/sysv/linux/nios2/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
	* sysdeps/unix/sysv/linux/sh/libc.abilist
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist:
	Add entries for explicit_bzero and __explicit_bzero_chk.
2016-12-16 16:21:54 -05:00
Adhemerval Zanella
b224637928 Fix powerpc64/power7 memchr for large input sizes
Current optimized powercp64/power7 memchr uses a strategy to check for
p versus align(p+n) (where 'p' is the input char pointer and n the
maximum size to check for the byte) without taking care for possible
overflow on the pointer addition in case of large 'n'.

It was triggered by 3038145ca2 where default rawmemchr (used to
created ppc64 rawmemchr in ifunc selection) now uses memchr (p, c, (size_t)-1)
on its implementation.

This patch fixes it by implement a satured addition where overflows
sets the maximum pointer size to UINTPTR_MAX.

Checked on powerpc64le-linux-gnu.

	[BZ# 20971]
	* sysdeps/powerpc/powerpc64/power7/memchr.S (__memchr): Avoid
	overflow in pointer addition.
	* string/test-memchr.c (do_test): Add an argument to pass as
	the size on memchr.
	(test_main): Add check for SIZE_MAX.
2016-12-16 11:30:20 -02:00
Gabriel F. T. Gomes
e4d6a83565 Make w_scalbln type-generic
This patch converts the wrapper scalbln (which set errno directly
rather than doing anything with __kernel_standard) to use the
type-generic template machinery, in the same way that has been done
for ldexp.

Tested for powerpc64le, s390, and x86_64.
2016-12-16 08:44:19 -02:00
Joseph Myers
0a2546cdaa Fix x86, x86_64 fmax, fmin sNaN handling, add tests (bug 20947).
Various fmax and fmin function implementations mishandle sNaN
arguments:

(a) When both arguments are NaNs, the return value should be a qNaN,
but sometimes it is an sNaN if at least one argument is an sNaN.

(b) Under TS 18661-1 semantics, if either argument is an sNaN then the
result should be a qNaN (whereas if one argument is a qNaN and the
other is not a NaN, the result should be the non-NaN argument).
Various implementations treat sNaNs like qNaNs here.

This patch fixes the x86 and x86_64 versions (ignoring float and
double for 32-bit x86 given the inability to reliably avoid the sNaN
turning into a qNaN before it gets to the called function).  Tests of
sNaN inputs to these functions are added.

Note on architecture versions I haven't changed for this issue:
AArch64 already gets this right (it uses a hardware instruction with
the correct semantics for both quiet and signaling NaNs) and does not
need changes.  It's possible Alpha, IA64, SPARC might need changes
(this would be shown by the testsuite if so).

Tested for x86_64 and x86 (both i686 and i586 builds, to cover the
different x86 implementations).

	[BZ #20947]
	* sysdeps/i386/fpu/s_fmaxl.S (__fmaxl): Add the arguments when
	either is a signaling NaN.
	* sysdeps/i386/fpu/s_fminl.S (__fminl): Likewise.  Make code
	follow fmaxl more closely.
	* sysdeps/i386/i686/fpu/s_fmaxl.S (__fmaxl): Add the arguments
	when either is a signaling NaN.
	* sysdeps/i386/i686/fpu/s_fminl.S (__fminl): Likewise.
	* sysdeps/x86_64/fpu/s_fmax.S (__fmax): Likewise.
	* sysdeps/x86_64/fpu/s_fmaxf.S (__fmaxf): Likewise.
	* sysdeps/x86_64/fpu/s_fmaxl.S (__fmaxl): Likewise.
	* sysdeps/x86_64/fpu/s_fmin.S (__fmin): Likewise.
	* sysdeps/x86_64/fpu/s_fminf.S (__fminf): Likewise.
	* sysdeps/x86_64/fpu/s_fminl.S (__fminl): Likewise.
	* math/libm-test.inc (fmax_test_data): Add tests of sNaN inputs.
	(fmin_test_data): Likewise.
2016-12-15 23:52:18 +00:00
Joseph Myers
9ce4ac64b2 Fix powerpc fmax, fmin sNaN handling (bug 20947).
Various fmax and fmin function implementations mishandle sNaN
arguments:

(a) When both arguments are NaNs, the return value should be a qNaN,
but sometimes it is an sNaN if at least one argument is an sNaN.

(b) Under TS 18661-1 semantics, if either argument is an sNaN then the
result should be a qNaN (whereas if one argument is a qNaN and the
other is not a NaN, the result should be the non-NaN argument).
Various implementations treat sNaNs like qNaNs here.

This patch fixes the powerpc versions of these functions (shared by
float and double, 32-bit and 64-bit).  The structure of those versions
is that all ordered cases are already handled before anything dealing
with the case where the arguments are unordered; thus, this patch
causes no change to the code executed in the common case (neither
argument a NaN).

Tested for powerpc (32-bit and 64-bit), together with tests to be
added along with the x86_64 / x86 fixes.

	[BZ #20947]
	* sysdeps/powerpc/fpu/s_fmax.S (__fmax): Add the arguments when
	either is a signaling NaN.
	* sysdeps/powerpc/fpu/s_fmin.S (__fmin): Likewise.
2016-12-15 00:43:16 +00:00
Joseph Myers
0acb8a2a85 Refactor long double information into bits/long-double.h.
Information about whether the ABI of long double is the same as that
of double is split between bits/mathdef.h and bits/wordsize.h.

When the ABIs are the same, bits/mathdef.h defines
__NO_LONG_DOUBLE_MATH.  In addition, in the case where the same glibc
binary supports both -mlong-double-64 and -mlong-double-128,
bits/wordsize.h defines __LONG_DOUBLE_MATH_OPTIONAL, along with
__NO_LONG_DOUBLE_MATH if this particular compilation is with
-mlong-double-64.

As part of the refactoring I proposed in
<https://sourceware.org/ml/libc-alpha/2016-11/msg00745.html>, this
patch puts all that information in a single header,
bits/long-double.h.  It is included from sys/cdefs.h alongside the
include of bits/wordsize.h, so other headers generally do not need to
include bits/long-double.h directly.

Previously, various bits/mathdef.h headers and bits/wordsize.h headers
had this long double information (including implicitly in some
bits/mathdef.h headers through not having the defines present in the
default version).  After the patch, it's all in six bits/long-double.h
headers.  Furthermore, most of those new headers are not
architecture-specific.  Architectures with optional long double all
use the ldbl-opt sysdeps directory, either in the order (ldbl-64-128,
ldbl-opt, ldbl-128) or (ldbl-128ibm, ldbl-opt).  Thus a generic header
for the case where long double = double, and headers in ldbl-128,
ldbl-96 and ldbl-opt, suffices to cover every architecture except for
cases where long double properties vary between different ABIs sharing
a set of installed headers; fortunately all the ldbl-opt cases share a
single compiler-predefined macro __LONG_DOUBLE_128__ that can be used
to tell whether this compilation is -mlong-double-64 or
-mlong-double-128.

The two cases where a set of headers is shared between ABIs with
different long double properties, MIPS (o32 has long double = double,
other ABIs use ldbl-128) and SPARC (32-bit has optional long double,
64-bit has required long double), need their own bits/long-double.h
headers.

As with bits/wordsize.h, multiple-include protection for this header
is generally implicit through the include guards on sys/cdefs.h, and
multiple inclusion is harmless in any case.  There is one subtlety:
the header must not define __LONG_DOUBLE_MATH_OPTIONAL if
__NO_LONG_DOUBLE_MATH was defined before its inclusion, because doing
so breaks how sysdeps/ieee754/ldbl-opt/nldbl-compat.h defines
__NO_LONG_DOUBLE_MATH itself before including system headers.  Subject
to keeping that working, it would be reasonable to move these macros
from defined/undefined #ifdef to always-defined 1/0 #if semantics, but
this patch does not attempt to do so, just rearranges where the macros
are defined.

After this patch, the only use of bits/mathdef.h is the alpha one for
modifying complex function ABIs for old GCC.  Thus, all versions of
the header other than the default and alpha versions are removed, as
is the include from math.h.

Tested for x86_64 and x86.  Also did compilation-only testing with
build-many-glibcs.py.

	* bits/long-double.h: New file.
	* sysdeps/ieee754/ldbl-128/bits/long-double.h: Likewise.
	* sysdeps/ieee754/ldbl-96/bits/long-double.h: Likewise.
	* sysdeps/ieee754/ldbl-opt/bits/long-double.h: Likewise.
	* sysdeps/mips/bits/long-double.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/long-double.h: Likewise.
	* math/Makefile (headers): Add bits/long-double.h.
	* misc/sys/cdefs.h: Include <bits/long-double.h>.
	* stdlib/strtold.c: Include <bits/long-double.h> instead of
	<bits/wordsize.h>.
	* bits/mathdef.h [!_COMPLEX_H]: Do not allow inclusion.
	[!__NO_LONG_DOUBLE_MATH]: Remove conditional code.
	* math/math.h: Do not include <bits/mathdef.h>.
	* sysdeps/aarch64/bits/mathdef.h: Remove file.
	* sysdeps/alpha/bits/mathdef.h [!_COMPLEX_H]: Do not allow
	inclusion.
	* sysdeps/ia64/bits/mathdef.h: Remove file.
	* sysdeps/m68k/m680x0/bits/mathdef.h: Likewise.
	* sysdeps/mips/bits/mathdef.h: Likewise.
	* sysdeps/powerpc/bits/mathdef.h: Likewise.
	* sysdeps/s390/bits/mathdef.h: Likewise.
	* sysdeps/sparc/bits/mathdef.h: Likewise.
	* sysdeps/x86/bits/mathdef.h: Likewise.
	* sysdeps/s390/s390-32/bits/wordsize.h
	[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]: Remove
	conditional code.
	* sysdeps/s390/s390-64/bits/wordsize.h
	[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]:
	Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/wordsize.h
	[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/wordsize.h
	[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]:
	Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/wordsize.h
	[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]:
	Likewise.
2016-12-14 18:27:56 +00:00
Joseph Myers
257dabc059 Include <linux/falloc.h> in bits/fcntl-linux.h.
This patch makes bits/fcntl-linux.h include <linux/falloc.h> to define
the FALLOC_* flags under __USE_GNU (linux/falloc.h defines only those
bits, nothing else).

Tested for x86_64 and x86.

	* sysdeps/unix/sysv/linux/bits/fcntl-linux.h [__USE_GNU]: Include
	<linux/falloc.h>.
	(FALLOC_FL_KEEP_SIZE): Remove.
	(FALLOC_FL_PUNCH_HOLE): Likewise.
	(FALLOC_FL_COLLAPSE_RANGE): Likewise.
	(FALLOC_FL_ZERO_RANGE): Likewise.
2016-12-14 18:23:15 +00:00
Adhemerval Zanella
8b9283dabd Consolidate renameat Linux implementation
This patch consolidates the Linux renameat implementation on
sysdeps/unix/sysv/linux/renameat.c.  The renameat syscall was
deprecated at b0da6d44 for newer architectures, so using the
auto-generation list may generate wrappers that returns ENOSYS.

Current code try to use __NR_renameat and if it is not define
it uses __NR_renameat2.

Checked on x86_64 and aarch64.

	* sysdeps/unix/sysv/linux/renameat.c: New file.
	* sysdeps/unix/sysv/linux/syscalls.list: Remove renameat.
2016-12-14 15:31:24 -02:00
Adhemerval Zanella
7fe1e1d60a Consolidate rename Linux implementation
This patch consolidates the Linux rename implementation on
sysdeps/unix/sysv/linux/rename.c.  Current code try to use
__NR_rename if is defined and apply the same strategy for
__NR_renameat and __NR_renameat2.

Check on x86_64 and aarch64.

	* sysdeps/unix/sysv/linux/rename.c: New file.
	* sysdeps/unix/sysv/linux/generic/rename.c: Remove file.
2016-12-14 15:31:24 -02:00
Gabriel F. T. Gomes
14348aaeff Make w_log1p type-generic
This patch converts the wrapper log1p (which set errno directly rather
than doing anything with __kernel_standard) to use the type-generic
template machinery, in the same way that has been done for ilogb.

Tested for powerpc64le, s390, and x86_64.
2016-12-14 11:19:33 -02:00
Andreas Schwab
5f4f13b47a powerpc: remove _dl_platform_string and _dl_powerpc_platforms 2016-12-13 10:15:09 +01:00
Rajalakshmi Srinivasaraghavan
d89060d603 powerpc: strncmp optimization for power9
Vectorized loops are used for strings > 32B when compared
to power8 optimization.

Tested on power9 ppc64le simulator.
2016-12-13 10:53:42 +05:30
Florian Weimer
92dcaa3e2f Add getentropy, getrandom, <sys/random.h> [BZ #17252] 2016-12-12 17:28:04 +01:00
Florian Weimer
c23de0aacb support: Introduce new subdirectory for test infrastructure
The new test driver in <support/test-driver.c> has feature parity with
the old one.  The main difference is that its hooking mechanism is
based on functions and function pointers instead of macros.  This
commit also implements a new environment variable, TEST_COREDUMPS,
which disables the code which disables coredumps (that is, it enables
them if the invocation environment has not disabled them).

<test-skeleton.c> defines wrapper functions so that it is possible to
use existing macros with the new-style hook functionality.

This commit changes only a few test cases to the new test driver, to
make sure that it works as expected.
2016-12-09 08:18:27 +01:00
Andreas Schwab
657c084cd6 Get rid of __elision_available 2016-12-07 09:35:07 +01:00
Joseph Myers
58307649fb Fix hypot sNaN handling (bug 20940).
TS 18661-1 generally defines libm functions taking sNaN arguments to
return qNaN and raise "invalid", even for the cases where a
corresponding qNaN argument would not result in a qNaN return.  This
includes hypot with one argument being an infinity and the other being
an sNaN.  This patch duly fixes hypot implementatations in glibc
(generic and powerpc) to ensure qNaN, computed by arithmetic on the
arguments, is returned in that case.

Various implementations do their checks for infinities and NaNs inline
by manipulating the representations of the arguments.  For simplicity,
this patch just uses issignaling to check for sNaN arguments.  This
could be inlined like the existing code (with due care about reversed
quiet NaN conventions, for implementations where that is relevant),
but given that all these checks are in cases where it's already known
at least one argument is not finite, which should be the uncommon
case, that doesn't seem worthwhile unless performance issues are
observed in practice.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #20940]
	* sysdeps/ieee754/dbl-64/e_hypot.c (__ieee754_hypot): Do not
	return Inf for arguments Inf and sNaN.
	* sysdeps/ieee754/flt-32/e_hypotf.c (__ieee754_hypotf): Likewise.
	* sysdeps/ieee754/ldbl-128/e_hypotl.c (__ieee754_hypotl):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_hypotl.c (__ieee754_hypotl):
	Likewise.
	* sysdeps/ieee754/ldbl-96/e_hypotl.c (__ieee754_hypotl): Likewise.
	* sysdeps/powerpc/fpu/e_hypot.c (TEST_INF_NAN): Do not return Inf
	for arguments Inf and sNaN.  When returning a NaN, compute it by
	arithmetic on the arguments.
	* sysdeps/powerpc/fpu/e_hypotf.c (TEST_INF_NAN): Likewise.
	* math/libm-test.inc (pow_test_data): Add tests of sNaN arguments.
2016-12-07 01:16:36 +00:00
Joseph Myers
a91fd168a0 Fix x86_64/x86 powl handling of sNaN arguments (bug 20916).
The x86_64/x86 powl implementations mishandle sNaN arguments, both by
returning sNaN in some cases (instead of doing arithmetic on the
arguments to produce the result when NaN arguments result in NaN
results) and by treating sNaN the same as qNaN for arguments (1, sNaN)
and (sNaN, 0), contrary to TS 18661-1 which requires those cases to
return qNaN instead of 1.

This patch makes the x86_64/x86 powl implementations follow TS 18661-1
semantics for sNaN arguments; sNaN tests are also added for pow.
Given the problems with testing float and double sNaN arguments on
32-bit x86 (sNaN tests disabled because the compiler may convert
unnecessarily to a qNaN when passing arguments), no changes are made
to the powf and pow implementations there.

Tested for x86_64 and x86.

	[BZ #20916]
	* sysdeps/i386/fpu/e_powl.S (__ieee754_powl): Do not return 1 for
	arguments (sNaN, 0) or (1, sNaN).  Do arithmetic on NaN arguments
	to compute result.
	* sysdeps/x86_64/fpu/e_powl.S (__ieee754_powl): Likewise.
	* math/libm-test.inc (pow_test_data): Add tests of sNaN arguments.
2016-12-06 00:33:19 +00:00
Torvald Riegel
ca6e601a9d Use C11-like atomics instead of plain memory accesses in x86 lock elision.
This uses atomic operations to access lock elision metadata that is accessed
concurrently (ie, adapt_count fields).  The size of the data is less than a
word but accessed only with atomic loads and stores; therefore, we add
support for shorter-size atomic load and stores too.

	* include/atomic.h (__atomic_check_size_ls): New.
	(atomic_load_relaxed, atomic_load_acquire, atomic_store_relaxed,
	atomic_store_release): Use it.
	* sysdeps/x86/elide.h (ACCESS_ONCE): Remove.
	(elision_adapt, ELIDE_LOCK): Use atomics.
	* sysdeps/unix/sysv/linux/x86/elision-lock.c (__lll_lock_elision): Use
	atomics and improve code comments.
	* sysdeps/unix/sysv/linux/x86/elision-trylock.c
	(__lll_trylock_elision): Likewise.
2016-12-05 16:19:43 +01:00
Joseph Myers
90ab295a9e Fix sysdeps/ieee754 pow handling of sNaN arguments (bug 20916).
Various pow function implementations mishandle sNaN arguments in
various ways.  This includes returning sNaN instead of qNaN for sNaN
arguments.  For arguments (1, sNaN) and (sNaN, 0), TS 18661-1
semantics are also that the result should be qNaN, whereas with a qNaN
argument there the result should be 1, but for the dbl-64
implementation of pow there are issues with sNaN arguments beyond not
implementing the TS 18661-1 semantics in those special cases.

This patch makes the implementations in sysdeps/ieee754 follow the TS
18661-1 semantics consistently.  Because x86 / x86_64 implementations
still need fixing, testcases are not included with this patch; they
will be included with the fix for the x86 / x86_64 versions.

Tested for x86_64, x86, mips64 and powerpc (with such testcases, which
pass in the mips64 and powerpc cases).

	[BZ #20916]
	* sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Do not return 1
	for arguments (sNaN, 0) or (1, sNaN).  Do arithmetic on NaN
	arguments to compute result.
	* sysdeps/ieee754/flt-32/e_powf.c (__ieee754_powf): Do not return
	1 for arguments (sNaN, 0) or (1, sNaN).
	* sysdeps/ieee754/ldbl-128/e_powl.c (__ieee754_powl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_powl.c (__ieee754_powl): Likewise.
2016-12-02 23:21:15 +00:00
Joseph Myers
72d839a42f Fix pow (qNaN, 0) result with -lieee (bug 20919), remove dead parts of wrappers.
The dbl-64 implementation of __ieee754_pow returns a NaN for pow
(qNaN, 0) when it should return 1.  Normally this is covered up by the
wrappers ending up calling __kernel_standard which fixes up the result
for this case, but for -lieee the wrappers are bypassed and the bad
result gets through as a return value.

Now, the wrappers fixing this are dealing with variant error handling
that wants a result of NaN for pow (qNaN, 0), and only ever call
__kernel_standard for this case if NaN resulted from __ieee754_pow.
This leads to a question of whether the dbl-64 code might be
deliberately returning NaN in order to use those code paths.  However,
I can find no sign that this is deliberate.  If it were deliberate one
would expect other implementations to do the same, and would expect
the return of NaN to be very old, but it appears it came in by
accident when the present e_pow.c implementation replaced an fdlibm
implementation in 2001.  So it appears to be unintended that this path
through the pow wrapper could be used at all.

So this patch fixes the implementation to return 1 in this case as
expected.  This is consistent with all the other implementations.  The
relevant path through the wrappers is now unreachable, so is removed
(which is the main motivation of this patch: to avoid that path
becoming accidentally reachable when implementing TS 18661-1 semantics
that pow (sNaN, 0) should return qNaN with "invalid" raised).  Another
path that would require __ieee754_pow (0, 0) to return 0 is also
unreachable (as all implementations return 1, in accordance with C99
semantics), so is removed as well.

Note: we don't have anything set up to test -lieee, which in any case
is obsolescent (at some point we should remove the ability for new
programs to access _LIB_VERSION or define matherr and have it called
by glibc).  So testing will be implicit through sNaN tests added when
making sNaN inputs work correctly for pow functions.

Tested for x86_64 and x86.

	[BZ #20919]
	* sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Do not return
	NaN first argument when raised to power 0.
	* math/w_pow.c (__pow): Do not check for NaN or zero results from
	raising to power zero.
	* math/w_powf.c (__powf): Likewise.
	* math/w_powl.c (__powl): Likewise.
	* sysdeps/ieee754/k_standard.c (__kernel_standard): Do not handle
	pow (0, 0) or pow (NaN, 0).
2016-12-02 22:50:46 +00:00
Florian Weimer
67aae64512 aarch64: Use explicit offsets in _dl_tlsdesc_dynamic
Commit 389d1f1b23 (“Partial ILP32
support for aarch64”) broke dynamic TLS support because a load
offset changed:

 0000000000000030 <_dl_tlsdesc_dynamic>:
   30:  a9bc7bfd        stp     x29, x30, [sp,#-64]!
   34:  910003fd        mov     x29, sp
   38:  a9020be1        stp     x1, x2, [sp,#32]
   3c:  a90313e3        stp     x3, x4, [sp,#48]
   40:  d53bd044        mrs     x4, tpidr_el0
   44:  c8dffc1f        ldar    xzr, [x0]
   48:  f9400401        ldr     x1, [x0,#8]
   4c:  f9400080        ldr     x0, [x4]
   50:  f9400823        ldr     x3, [x1,#16]
   54:  f9400002        ldr     x2, [x0]
   58:  eb02007f        cmp     x3, x2
   5c:  540001a8        b.hi    90 <_dl_tlsdesc_dynamic+0x60>
   60:  f9400022        ldr     x2, [x1]
   64:  8b021000        add     x0, x0, x2, lsl #4
   68:  f9400000        ldr     x0, [x0]
   6c:  b100041f        cmn     x0, #0x1
   70:  54000100        b.eq    90 <_dl_tlsdesc_dynamic+0x60>
-  74:  f9400421        ldr     x1, [x1,#8]
+  74:  f9400821        ldr     x1, [x1,#16]
   78:  8b010000        add     x0, x0, x1
…

This commit introduces explicit struct offsets, generated
from the C headers, fixing the regression.
2016-12-02 16:52:57 +01:00
Stefan Liebler
8068094f6e S390: Regenerate ULPs.
Updated ulps file.

ChangeLog:

	* sysdeps/s390/fpu/libm-test-ulps: Regenerated.
2016-12-02 12:52:36 +01:00
Joseph Myers
55a38f8236 Add llogb, llogbf, llogbl.
TS 18661-1 defines llogb functions that are like ilogb except that
they return long int instead of int.  Corresponding FP_LLOGB* macros
are defined, whose values are required to have the obvious
correspondence to those of the FP_ILOGB* macros.

This patch implements these functions and macros for glibc.  llogb
uses the type-generic infrastructure, with an implementation similar
to the wrapper for ilogb but with additional conversion from FP_ILOGB*
to FP_LLOGB*; this approach avoids needing to modify or duplicate any
of the architecture-specific ilogb implementations.  Tests are also
based on those for ilogb.

Ideally the llogb functions would alias the ilogb ones when long is
32-bit, but such aliasing requires the associated header declarations
of the different-type alias to be hidden, typically by defining macros
before including the header (see e.g. how
sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c defines lround to
__hidden_lround before including <math.h>).  The infrastructure for
type-generic function implementations does not support defining such
macros at present (since C code can't define a macro whose name is
determined by other macros).  So this patch leaves them as separate
functions (similar to e.g. scalbln and scalbn being separate in such a
case as well), but with the remapping of FP_ILOGB* to FP_LLOGB*
conditioned out in the case where it would be the identity map.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb):
	New declaration.
	* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb): New
	macro.
	* math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (__FP_LONG_MAX):
	New macro.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGB0): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGBNAN): Likewise.
	* math/Versions (llogb): New libm symbol at version GLIBC_2.25.
	(llogbf): Likewise.
	(llogbl): Likewise.
	* math/Makefile (gen-libm-calls): Add w_llogbF.
	(tests): Add test-fp-llogb-constants.
	* math/w_llogb_template.c: New file.  Based on
	math/w_ilogb_template.c.
	* math/libm-test.inc (llogb_test_data): New array.
	(llogb_test): New function.
	(main): Call llogb_test.
	* math/test-fp-llogb-constants.c: New file.  Based on
	math/test-fp-ilogb-constants.c.
	* math/test-tgmath-ret.c (llogb): New CHECK_RET_CONST call.
	(do_test): Call check_return_llogb.
	* math/test-tgmath.c (NCALLS): Increase to 126.
	(F(compile_test)): Call llogb.
	(F(llogb)): New function.
	* manual/math.texi (Exponents and Logarithms): Document llogb,
	llogbf, llogbl, FP_LLOGB0 and FP_LLOGBNAN.
	* manual/libm-err-tab.pl (@all_functions): Add llogb.
	* sysdeps/ieee754/ldbl-opt/nldbl-llogb.c: New file.
	* sysdeps/ieee754/ldbl-opt/w_llogbl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add llogb.
	(CFLAGS-nldbl-llogb.c): New variable.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-12-02 01:42:49 +00:00
Joseph Myers
6dc0741677 Make ldbl-128 getpayload, setpayload functions use _Float128.
When I added the getpayload and setpayload functions I failed to make
the ldbl-128 functions use the _Float128 type name like most other
ldbl-128 functions do in preparation for being used to implement *f128
functions.  This patch fixes them to use that name.

Tested for mips64.

	* sysdeps/ieee754/ldbl-128/s_getpayloadl.c (getpayloadl): Use
	_Float128 instead of long double.
	* sysdeps/ieee754/ldbl-128/s_setpayloadl_main.c (FUNC): Likewise.
2016-12-01 23:23:51 +00:00
Joseph Myers
2314a29b62 Add missing hidden_def (__sigsetjmp).
This patch adds the missing hidden_def (__sigsetjmp) on various
architectures that were failing to build (as noted in
<https://sourceware.org/ml/libc-alpha/2016-11/msg01124.html>).

Tested (compilation only) with build-many-glibcs.py.

	* sysdeps/alpha/setjmp.S (__sigsetjmp): Use hidden_def.
	* sysdeps/hppa/setjmp.S (__sigsetjmp): Likewise.
	* sysdeps/mips/mips64/setjmp.S (__sigsetjmp): Likewise.
	* sysdeps/mips/setjmp.S (__sigsetjmp): Likewise.
	* sysdeps/sh/sh3/setjmp.S (__sigsetjmp): Likewise.
	* sysdeps/sh/sh4/setjmp.S (__sigsetjmp): Likewise.
	* sysdeps/sparc/sparc32/setjmp.S (__sigsetjmp): Likewise.
	* sysdeps/tile/setjmp.S (__sigsetjmp): Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/setjmp.S (__sigsetjmp):
	Likewise.
2016-12-01 20:49:25 +00:00
Adhemerval Zanella
5cd94e67d0 powerpc: Remove stpcpy internal clash with IFUNC
Commit c7debbdfac redirected the internal strrch to default powerpc64
implementation by redefining the weak_alias at
sysdeps/powerpc/powerpc64/multiarch/strchr-ppc64.c:

  #undef weak_alias
  #define weak_alias(name, aliasname) \
    extern __typeof (__strrchr_ppc) aliasname \
      __attribute__ ((weak, alias ("__strrchr_ppc")));

This creates a __GI_strchr alias that clashes with the IFUNC symbol in
stprchr.os.  There is not need to define the default version for internal
version, since ifunc should work internally for powerpc64.  This patch
removes the weak_alias indirection.

Checked on powerpc64le.

	* sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c (weak_alias):
	Remove redirection to __strrchr_ppc.
2016-12-01 15:53:16 -02:00
Rajalakshmi Srinivasaraghavan
80ab6401a9 powerpc: strcmp optimization for power9
Vectorized loops are used for strings > 32B when compared
to power8 optimization.

Tested on power9 ppc64le simulator.
2016-12-01 11:35:43 +05:30
Joseph Myers
b2491db6c8 Refactor FP_ILOGB* out of bits/mathdef.h.
Continuing the refactoring of bits/mathdef.h, this patch stops it
defining FP_ILOGB0 and FP_ILOGBNAN, moving the required information to
a new header bits/fp-logb.h.

There are only two possible values of each of those macros permitted
by ISO C.  TS 18661-1 adds corresponding macros for llogb, and their
values are required to correspond to those of the ilogb macros in the
obvious way.  Thus two boolean values - for which the same choices are
correct for most architectures - suffice to determine the value of all
these macros, and by defining macros for those boolean values in
bits/fp-logb.h we can then define the public FP_* macros in math.h and
avoid the present duplication of the associated feature test macro
logic.

This patch duly moves to bits/fp-logb.h defining __FP_LOGB0_IS_MIN and
__FP_LOGBNAN_IS_MIN.  Default definitions of those to 0 are correct
for both architectures, while ia64, m68k and x86 get their own
versions of bits/fp-logb.h to reflect their use of values different
from the defaults.

The patch renders many copies of bits/mathdef.h trivial (needed only
to avoid the default __NO_LONG_DOUBLE_MATH).  I'll revise
<https://sourceware.org/ml/libc-alpha/2016-11/msg00865.html>
accordingly so that it removes all bits/mathdef.h headers except the
default one and the alpha one, and arranges for the header to be
included only by complex.h as the only remaining use at that point
will be for the alpha ABI issues there.

Tested for x86_64 and x86.  Also did compile-only testing with
build-many-glibcs.py (using glibc sources from before the commit that
introduced many build failures with undefined __GI___sigsetjmp).

	* bits/fp-logb.h: New file.
	* sysdeps/ia64/bits/fp-logb.h: Likewise.
	* sysdeps/m68k/m680x0/bits/fp-logb.h: Likewise.
	* sysdeps/x86/bits/fp-logb.h: Likewise.
	* math/Makefile (headers): Add bits/fp-logb.h.
	* math/math.h: Include <bits/fp-logb.h>.
	[__USE_ISOC99] (FP_ILOGB0): Define based on __FP_LOGB0_IS_MIN.
	[__USE_ISOC99] (FP_ILOGBNAN): Define based on __FP_LOGBNAN_IS_MIN.
	* bits/mathdef.h (FP_ILOGB0): Remove.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/aarch64/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/alpha/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/ia64/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/m68k/m680x0/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/mips/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/powerpc/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/s390/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/sparc/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/x86/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
2016-12-01 02:56:55 +00:00
Adhemerval Zanella
8072373ea9 powerpc: Remove stpcpy internal clash with IFUNC
Commit 142e0a9953 redirected the internal stpcpy to default powerpc64
implementation by redefining the weak_alias at
sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.c:

  #undef weak_alias
  #define weak_alias(name, aliasname) \
    extern __typeof (__stpcpy_ppc) aliasname \
      __attribute__ ((weak, alias ("__stpcpy_ppc")));

This creates a __GI_stpcpy alias that clashes with the IFUNC symbol in
stpcpy.os.  There is not need to define the default version for internal
version, since ifunc should work internally for powerpc64.  This patch
removes the weak_alias indirection.

Checked on powerpc64le.

	* sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.c (weak_alias):
	Remove redirection to __stpcpy_ppc.
2016-11-30 15:13:26 -02:00
Florian Weimer
b04beebf07 ld.so: Remove __libc_memalign
It is no longer needed since commit 6c444ad6e9
(elf: Do not use memalign for TCB/TLS blocks allocation [BZ #17730]).
Applications do not link against ld.so and will use the definition in
libc.so, so there is no ABI impact.
2016-11-30 16:23:58 +01:00
Florian Weimer
9e78f6f6e7 Implement _dl_catch_error, _dl_signal_error in libc.so [BZ #16628]
This change moves the main implementation of _dl_catch_error,
_dl_signal_error to libc.so, where TLS variables can be used
directly.  This removes a writable function pointer from the
rtld_global variable.

For use during initial relocation, minimal implementations of these
functions are provided in ld.so.  These are eventually interposed
by the libc.so implementations.  This is implemented by compiling
elf/dl-error-skeleton.c twice, via elf/dl-error.c and
elf/dl-error-minimal.c.

As a side effect of this change, the static version of dl-error.c
no longer includes support for the
_dl_signal_cerror/_dl_receive_error mechanism because it is only
used in ld.so.
2016-11-30 15:59:57 +01:00
Steve Ellcey
a09411756f Use XSTAT_IS_XSTAT64 in generic xstat functions
* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat.c: Do not define
	fxstat if XSTAT_IS_XSTAT64 is set to non-zero.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c: Ditto for
	fxstatat.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat.c: Ditto for
	lxstat.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/xstat.c: Ditto for xstat.

	* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat64.c: New file.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c: New file.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat64.c: Make __lxstat
	an alias of __lxstat64 if XSTAT_IS_XSTAT64 is set to non-zero.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/xstat64.c: Ditto for
	__xstat.
2016-11-29 08:06:47 -08:00
Florian Weimer
b365289364 powerpc: Add hidden definition for __sigsetjmp
There already is a hidden prototype for __sigsetjmp, but the
architecture-specific definition was missing.
2016-11-29 10:16:35 +01:00
Florian Weimer
76388b236a powerpc: Remove unintended __longjmp symbol from ABI
The __longjmp symbol was left in accidentally.  It is not exported
through a Versions file, but through a .symver assembler directive.

The corresponding exported symbol was removed from the non-fpu
powerpc64 targets in commit 9b9ef82358.
2016-11-29 10:08:07 +01:00
Joseph Myers
f11e220d2d Refactor FP_FAST_* into bits/fp-fast.h.
Continuing the refactoring of bits/mathdef.h, this patch moves the
FP_FAST_* definitions into a new bits/fp-fast.h header.  Currently
this is only for FP_FAST_FMA*, but in future it would be the
appropriate place for the FP_FAST_* macros from TS 18661-1 as well.

The generic bits/mathdef.h header defines these macros based on
whether the compiler defines __FP_FAST_*.  Most architecture-specific
headers, however, fail to do so, meaning that if the architecture (or
some particular processors) does in fact have fused operations, and
GCC knows to use them inline, the FP_FAST_* macros will still not be
defined.

By refactoring, this patch causes the generic version (based on
__FP_FAST_*) to be used in more cases, and so the macro definitions to
be more accurate.  Architectures that already defined some or all of
these macros other than based on the predefines have their own
versions of fp-fast.h, which are arranged so they define FP_FAST_* if
either the architecture-specific conditions are true or __FP_FAST_*
are defined.

After this refactoring, various bits/mathdef.h headers for
architectures with long double = double are semantically identical to
the generic version.  The patch removes those headers that are
redundant.  (In fact two of the four removed were already redundant
before this patch because they did use __FP_FAST_*.)

Tested for x86_64 and x86, and compilation-only with
build-many-glibcs.py.

	* bits/fp-fast.h: New file.
	* sysdeps/aarch64/bits/fp-fast.h: Likewise.
	* sysdeps/powerpc/bits/fp-fast.h: Likewise.
	* math/Makefile (headers): Add bits/fp-fast.h.
	* math/math.h: Include <bits/fp-fast.h>.
	* bits/mathdef.h (FP_FAST_FMA): Remove.
	(FP_FAST_FMAF): Likewise.
	(FP_FAST_FMAL): Likewise.
	* sysdeps/aarch64/bits/mathdef.h (FP_FAST_FMA): Likewise.
	(FP_FAST_FMAF): Likewise.
	* sysdeps/powerpc/bits/mathdef.h (FP_FAST_FMA): Likewise.
	(FP_FAST_FMAF): Likewise.
	* sysdeps/x86/bits/mathdef.h (FP_FAST_FMA): Likewise.
	(FP_FAST_FMAF): Likewise.
	(FP_FAST_FMAL): Likewise.
	* sysdeps/arm/bits/mathdef.h: Remove file.
	* sysdeps/hppa/fpu/bits/mathdef.h: Likewise.
	* sysdeps/sh/sh4/bits/mathdef.h: Likewise.
	* sysdeps/tile/bits/mathdef.h: Likewise.
2016-11-29 01:45:00 +00:00
Joseph Myers
e5277ba25d Make ilogb wrappers type-generic.
This patch converts the ilogb wrappers (which set errno directly
rather than doing anything with __kernel_standard) to use the
type-generic template machinery.  This is intended as preparation for
adding llogb.

Tested for x86_64 and x86, and tested compile for other architectures
with build-many-glibcs.py.

	* math/w_ilogb_template.c: New file.  Based on math/w_ilogb.c.
	* math/w_ilogb.c: Remove.
	* math/w_ilogbf.c: Likewise.
	* math/w_ilogbl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_ilogb.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_ilogbl.c: Likewise.
	* math/Makefile (gen-libm-calls): Add w_ilogbF.
	(libm-calls): Remove w_ilogbF.
	* sysdeps/ieee754/ldbl-opt/math-type-macros-double.h
	(LDOUBLE_ilogbl_libm_version): New macro.
2016-11-28 23:27:23 +00:00
Joseph Myers
b3daf3ee09 Work around IA64 tst-setcontext2.c compile failure.
Building tests for IA64 runs into a build failure compiling
stdlib/tst-setcontext2.c:

tst-setcontext2.c: In function 'do_test':
tst-setcontext2.c:210:20: error: passing argument 1 of 'sigismember' from incompatible pointer type [-Werror=incompatible-pointer-types]
   if (sigismember (&oldctx.uc_sigmask, SIGUSR2) != 1)
                    ^

Indeed, the IA64 uc_sigmask as unsigned long rather than the larger
userspace sigset_t.  Fixing this might be hard; this patch works
around the build failure by making IA64 wrap the test with a version
that #defines sigismember to add a cast (I'd welcome a better approach
for fixing this).

Tested (compilation only) for ia64.

	* sysdeps/unix/sysv/linux/ia64/tst-setcontext2.c: New file.
2016-11-28 23:13:46 +00:00
Joseph Myers
547e970409 Fix sysdeps/ia64/fpu/libm-symbols.h for inclusion in testcases.
IA64 builds in math/ use "-include libm-symbols.h".  This breaks the
signgam tests, which rely on undefining _LIBC and feature test macros
and defining _ISOMAC before including system headers to get them to
provide only ISO C declarations (libm-symbols.h ending up indirectly
including headers which result in this breaking); similarly, it breaks
C++ tests as some headers included from libm-symbols.h are not ready
for inclusion in C++ code.  This patch disables the contents of
libm-symbols.h if __STRICT_ANSI__ or __cplusplus are defined to avoid
this problem (this header can only test symbols defined before the
source file is processed, so can't test _ISOMAC because that's defined
within the source file, after this header is included).

Tested (compilation only) for ia64.

	* sysdeps/ia64/fpu/libm-symbols.h: Make contents conditional on
	[!__STRICT_ANSI__ && !__cplusplus].
2016-11-28 23:12:49 +00:00
H.J. Lu
c9070e6305 X86_64: Don't use PLT nor GOT in static archives [BZ #20750]
There is no need to use PLT nor GOT in static archives to branch to a
function, regardless whether static archives is compiled with PIC or
not.  When static archives are used to create dynamic executable,
PLT/GOT may be used.  The resulting executable still works correctly.

	[BZ #20750]
	* sysdeps/x86_64/sysdep.h (JUMPTARGET): Check SHARED instead
	of PIC.
2016-11-28 09:45:07 -08:00
Steve Ellcey
389d1f1b23 Partial ILP32 support for aarch64.
* sysdeps/aarch64/crti.S: Add include of sysdep.h.
	(call_weak_fn): Use PTR_REG to get correct reg name in ILP32.
	* sysdeps/aarch64/dl-irel.h: Add include of sysdep.h.
	(elf_irela): Use AARCH64_R macro to get correct relocation in ILP32.
	* sysdeps/aarch64/dl-machine.h: Add include of sysdep.h.
	(elf_machine_load_address, RTLD_START, RTLD_START_1, RTLD_START,
	elf_machine_type_class, ELF_MACHINE_JMP_SLOT, elf_machine_rela,
	elf_machine_lazy_rel): Add ifdef's for ILP32 support.
	* sysdeps/aarch64/dl-tlsdesc.S (_dl_tlsdesc_return,
	_dl_tlsdesc_return_lazy, _dl_tlsdesc_dynamic,
	_dl_tlsdesc_resolve_hold): Extend pointers in ILP32, use PTR_REG
	to get correct reg name for ILP32.
	* sysdeps/aarch64/dl-trampoline.S (ip01): New Macro.
	(RELA_SIZE): New Macro.
	(_dl_runtime_resolve, _dl_runtime_profile): Use new macros and PTR_REG
	to support ILP32.
	* sysdeps/aarch64/jmpbuf-unwind.h (_JMPBUF_CFA_UNWINDS_ADJ): Add
	cast for ILP32 mode.
	* sysdeps/aarch64/memcmp.S (memcmp): Extend arg pointers for ILP32 mode.
	* sysdeps/aarch64/memcpy.S (memmove, memcpy): Ditto.
	* sysdeps/aarch64/memset.S (__memset): Ditto.
	* sysdeps/aarch64/strchr.S (strchr): Ditto.
	* sysdeps/aarch64/strchrnul.S (__strchrnul): Ditto.
	* sysdeps/aarch64/strcmp.S (strcmp): Ditto.
	* sysdeps/aarch64/strcpy.S (strcpy): Ditto.
	* sysdeps/aarch64/strlen.S (__strlen): Ditto.
	* sysdeps/aarch64/strncmp.S (strncmp): Ditto.
	* sysdeps/aarch64/strnlen.S (strnlen): Ditto.
	* sysdeps/aarch64/strrchr.S (strrchr): Ditto.
	* sysdeps/unix/sysv/linux/aarch64/clone.S: Ditto.
	* sysdeps/unix/sysv/linux/aarch64/setcontext.S (__setcontext): Ditto.
	* sysdeps/unix/sysv/linux/aarch64/swapcontext.S (__swapcontext): Ditto.
	* sysdeps/aarch64/__longjmp.S (__longjmp): Extend pointers in ILP32,
	change PTR_MANGLE call to use register numbers instead of names.
	* sysdeps/unix/sysv/linux/aarch64/getcontext.S (__getcontext): Ditto.
	* sysdeps/aarch64/setjmp.S (__sigsetjmp): Extend arg pointers for
	ILP32 mode, change PTR_MANGLE calls to use register numbers.
	* sysdeps/aarch64/start.S (_start): Ditto.
	* sysdeps/aarch64/nptl/bits/pthreadtypes.h
	(__PTHREAD_RWLOCK_INT_FLAGS_SHARED): New define.
	(__SIZEOF_PTHREAD_ATTR_T, __SIZEOF_PTHREAD_MUTEX_T,
	__SIZEOF_PTHREAD_MUTEXATTR_T, __SIZEOF_PTHREAD_COND_T,
	__SIZEOF_PTHREAD_COND_COMPAT_T, __SIZEOF_PTHREAD_CONDATTR_T,
	__SIZEOF_PTHREAD_RWLOCK_T, __SIZEOF_PTHREAD_RWLOCKATTR_T,
	__SIZEOF_PTHREAD_BARRIER_T, __SIZEOF_PTHREAD_BARRIERATTR_T):
	Make defined values dependent on __ILP32__.
	* sysdeps/aarch64/nptl/bits/semaphore.h (__SIZEOF_SEM_T): Change define.
	(sem_t): Change __align type.
	* sysdeps/aarch64/sysdep.h (AARCH64_R, PTR_REG, PTR_LOG_SIZE, DELOUSE,
	PTR_SIZE): New Macros.
	(LDST_PCREL, LDST_GLOBAL) Update to use PTR_REG.
	* sysdeps/unix/sysv/linux/aarch64/bits/fcntl.h (O_LARGEFILE):
	Set when in ILP32 mode.
	(F_GETLK64, F_SETLK64, F_SETLKW64): Only set in LP64 mode.
	* sysdeps/unix/sysv/linux/aarch64/dl-cache.h (DL_CACHE_DEFAULT_ID):
	Set elf flags for ILP32.
	(add_system_dir): Set ILP32 library directories.
	* sysdeps/unix/sysv/linux/aarch64/init-first.c
	(_libc_vdso_platform_setup): Set minimum kernel version for ILP32.
	* sysdeps/unix/sysv/linux/aarch64/ldconfig.h
	(SYSDEP_KNOWN_INTERPRETER_NAMES): Add ILP32 names.
	* sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h (GET_PC, SET_PC):
	New Macros.
	* sysdeps/unix/sysv/linux/aarch64/sysdep.h: Handle ILP32 pointers.
2016-11-28 09:01:23 -08:00
Steve Ellcey
9e878fa957 Fix for [f]statfs64/[f]statfs aliasing patch
* sysdeps/unix/sysv/linux/fstatfs64.c: Reorder include files,
	only alias fstatfs and __fstatfs if STATFS_IS_STATFS64 is non-zero.
	* sysdeps/unix/sysv/linux/statfs64.c: Ditto for statfs and __statfs.
2016-11-28 08:51:01 -08:00
Joseph Myers
b5e35350aa Do not include asm/cachectl.h in nios2 sys/cachectl.h.
The nios2 sys/cachectl.h includes a kernel header asm/cachectl.h,
which does not exist, so causing the check-installed-headers tests to
fail.  This patch removes the include of a nonexistent header.

Tested (compilation only) for nios2.

	* sysdeps/unix/sysv/linux/nios2/sys/cachectl.h: Do not include
	<asm/cachectl.h>.
2016-11-28 13:55:31 +00:00
Joseph Myers
457663a7cd Add setpayloadsig, setpayloadsigf, setpayloadsigl.
TS 18661-1 defines functions for manipulating the payloads of NaNs.
This patch implements the setpayloadsig functions for glibc; these are
like the setpayload functions, but produce a signaling NaN instead of
a quiet NaN.

The substance of the implementation was included with the setpayload
implementation, so the new files here just need to wrap the main files
with different defines to build the new functions.

Because the functions store a signaling NaN via a pointer and the
libm-test macros choose a suitable initial value for the variable in
such a case by comparing with the expected value, the relevant macro
needs to clear exceptions after FE_INVALID may have been raised by
that comparison.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(setpayloadsig): New declaration.
	* math/Versions (setpayloadsig): New libm symbol at version
	GLIBC_2.25.
	(setpayloadsigf): Likewise.
	(setpayloadsigl): Likewise.
	* math/Makefile (libm-calls): Add s_setpayloadsigF.
	* math/libm-test.inc (RUN_TEST_Ff_b1): Call feclearexcept
	(FE_ALL_EXCEPT) after initializing EXTRA_VAR.
	(setpayloadsig_test_data): New array.
	(setpayloadsig_test): New function.
	(main): Call setpayloadsig_test.
	* manual/arith.texi (FP Bit Twiddling): Document setpayloadsig,
	setpayloadsigf and setpayloadsigl.
	* manual/libm-err-tab.pl: Update comment on interfaces without
	ulps tabulated.
	* sysdeps/ieee754/dbl-64/s_setpayloadsig.c: New file.
	* sysdeps/ieee754/flt-32/s_setpayloadsigf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_setpayloadsigl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_setpayloadsigl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_setpayloadsigl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-setpayloadsig.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
	setpayloadsig.
	(CFLAGS-nldbl-setpayloadsig.c): New variable.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-11-24 23:56:48 +00:00
Adhemerval Zanella
c579f48edb Remove cached PID/TID in clone
This patch remove the PID cache and usage in current GLIBC code.  Current
usage is mainly used a performance optimization to avoid the syscall,
however it adds some issues:

  - The exposed clone syscall will try to set pid/tid to make the new
    thread somewhat compatible with current GLIBC assumptions.  This cause
    a set of issue with new workloads and usecases (such as BZ#17214 and
    [1]) as well for new internal usage of clone to optimize other algorithms
    (such as clone plus CLONE_VM for posix_spawn, BZ#19957).

  - The caching complexity also added some bugs in the past [2] [3] and
    requires more effort of each port to handle such requirements (for
    both clone and vfork implementation).

  - Caching performance gain in mainly on getpid and some specific
    code paths.  The getpid performance leverage is questionable [4],
    either by the idea of getpid being a hotspot as for the getpid
    implementation itself (if it is indeed a justifiable hotspot a
    vDSO symbol could let to a much more simpler solution).

    Other usage is mainly for non usual code paths, such as pthread
    cancellation signal and handling.

For thread creation (on stack allocation) the code simplification in fact
adds some performance gain due the no need of transverse the stack cache
and invalidate each element pid.

Other thread usages will require a direct getpid syscall, such as
cancellation/setxid signal, thread cancellation, thread fail path (at
create_thread), and thread signal (pthread_kill and pthread_sigqueue).
However these are hardly usual hotspots and I think adding a syscall is
justifiable.

It also simplifies both the clone and vfork arch-specific implementation.
And by review each fork implementation there are some discrepancies that
this patch also solves:

  - microblaze clone/vfork does not set/reset the pid/tid field
  - hppa uses the default vfork implementation that fallback to fork.
    Since vfork is deprecated I do not think we should bother with it.

The patch also removes the TID caching in clone. My understanding for
such semantic is try provide some pthread usage after a user program
issue clone directly (as done by thread creation with CLONE_PARENT_SETTID
and pthread tid member).  However, as stated before in multiple discussions
threads, GLIBC provides clone syscalls without further supporting all this
semantics.

I ran a full make check on x86_64, x32, i686, armhf, aarch64, and powerpc64le.
For sparc32, sparc64, and mips I ran the basic fork and vfork tests from
posix/ folder (on a qemu system).  So it would require further testing
on alpha, hppa, ia64, m68k, nios2, s390, sh, and tile (I excluded microblaze
because it is already implementing the patch semantic regarding clone/vfork).

[1] https://codereview.chromium.org/800183004/
[2] https://sourceware.org/ml/libc-alpha/2006-07/msg00123.html
[3] https://sourceware.org/bugzilla/show_bug.cgi?id=15368
[4] http://yarchive.net/comp/linux/getpid_caching.html

	* sysdeps/nptl/fork.c (__libc_fork): Remove pid cache setting.
	* nptl/allocatestack.c (allocate_stack): Likewise.
	(__reclaim_stacks): Likewise.
	(setxid_signal_thread): Obtain pid through syscall.
	* nptl/nptl-init.c (sigcancel_handler): Likewise.
	(sighandle_setxid): Likewise.
	* nptl/pthread_cancel.c (pthread_cancel): Likewise.
	* sysdeps/unix/sysv/linux/pthread_kill.c (__pthread_kill): Likewise.
	* sysdeps/unix/sysv/linux/pthread_sigqueue.c (pthread_sigqueue):
	Likewise.
	* sysdeps/unix/sysv/linux/createthread.c (create_thread): Likewise.
	* sysdeps/unix/sysv/linux/getpid.c: Remove file.
	* nptl/descr.h (struct pthread): Change comment about pid value.
	* nptl/pthread_getattr_np.c (pthread_getattr_np): Remove thread
	pid assert.
	* sysdeps/unix/sysv/linux/pthread-pids.h (__pthread_initialize_pids):
	Do not set pid value.
	* nptl_db/td_ta_thr_iter.c (iterate_thread_list): Remove thread
	pid cache check.
	* nptl_db/td_thr_validate.c (td_thr_validate): Likewise.
	* sysdeps/aarch64/nptl/tcb-offsets.sym: Remove pid offset.
	* sysdeps/alpha/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/arm/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/hppa/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/i386/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/ia64/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/m68k/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/microblaze/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/mips/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/nios2/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/powerpc/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/s390/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/sh/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/sparc/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/tile/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/x86_64/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/clone.S: Remove pid and tid caching.
	* sysdeps/unix/sysv/linux/alpha/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/arm/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/hppa/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/ia64/clone2.S: Likewise.
	* sysdeps/unix/sysv/linux/mips/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/nios2/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/sh/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/tile/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/vfork.S: Remove pid set and reset.
	* sysdeps/unix/sysv/linux/alpha/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/arm/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/ia64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/mips/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/nios2/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/sh/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/tile/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/tst-clone2.c (f): Remove direct pthread
	struct access.
	(clone_test): Remove function.
	(do_test): Rewrite to take in consideration pid is not cached anymore.
2016-11-24 19:38:51 -02:00
Joseph Myers
93eb85ceb2 Refactor float_t, double_t information into bits/flt-eval-method.h.
At present, definitions of float_t and double_t are split among many
bits/mathdef.h headers.

For all but three architectures, these types are float and double.
Furthermore, if you assume __FLT_EVAL_METHOD__ to be defined, that
provides a more generic way of determining the correct values of these
typedefs.  Defining these typedefs more generally based on
__FLT_EVAL_METHOD__ was previously proposed by Paul Eggert in
<https://sourceware.org/ml/libc-alpha/2012-02/msg00002.html>.

This patch refactors things in the way I proposed in
<https://sourceware.org/ml/libc-alpha/2016-11/msg00745.html>.  A new
header bits/flt-eval-method.h defines a single macro,
__GLIBC_FLT_EVAL_METHOD, which is then used by math.h to define
float_t and double_t.  The default is based on __FLT_EVAL_METHOD__
(although actually a default to 0 would have the same effect for
current ports, because ports where values other than 0 or 16 are
possible all have their own headers).

To avoid changing the existing semantics in any case, including for
compilers not defining __FLT_EVAL_METHOD__, architecture-specific
files are then added for m68k, s390, x86 which replicate the existing
semantics.  At least with __FLT_EVAL_METHOD__ values possible with
GCC, there should be no change to the choices of float_t and double_t
for any supported configuration.

Architecture maintainer notes:

* m68k: sysdeps/m68k/m680x0/bits/flt-eval-method.h always defines
  __GLIBC_FLT_EVAL_METHOD to 2 to replicate the existing logic.  But
  actually GCC defines __FLT_EVAL_METHOD__ to 0 if TARGET_68040.  It
  might make sense to make the header prefer to base things on
  __FLT_EVAL_METHOD__ if defined, like the x86 version, and so make
  the choices of these types more accurate (with a NEWS entry as for
  the other changes to these types on particular architectures).

* s390: sysdeps/s390/bits/flt-eval-method.h always defines
  __GLIBC_FLT_EVAL_METHOD to 1 to replicate the existing logic.  As
  previously discussed, it might make sense in coordination with GCC
  to eliminate the historic mistake, avoid excess precision in the
  -fexcess-precision=standard case and make the typedefs match (with a
  NEWS entry, again).

Tested for x86-64 and x86.  Also did compilation-only testing with
build-many-glibcs.py.

	* bits/flt-eval-method.h: New file.
	* sysdeps/m68k/m680x0/bits/flt-eval-method.h: Likewise.
	* sysdeps/s390/bits/flt-eval-method.h: Likewise.
	* sysdeps/x86/bits/flt-eval-method.h: Likewise.
	* math/Makefile (headers): Add bits/flt-eval-method.h.
	* math/math.h: Include <bits/flt-eval-method.h>.
	[__USE_ISOC99] (float_t): Define based on __GLIBC_FLT_EVAL_METHOD.
	[__USE_ISOC99] (double_t): Likewise.
	* bits/mathdef.h (float_t): Remove.
	(double_t): Likewise.
	* sysdeps/aarch64/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/alpha/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/arm/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/hppa/fpu/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/ia64/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/m68k/m680x0/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/mips/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/powerpc/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/s390/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/sh/sh4/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/sparc/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/tile/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
	* sysdeps/x86/bits/mathdef.h (float_t): Likewise.
	(double_t): Likewise.
2016-11-24 18:44:50 +00:00
Aurelien Jarno
380ec16d62 x86_64: fix static build of __memcpy_chk for compilers defaulting to PIC/PIE
When glibc is compiled with gcc 6.2 that has been configured with
to default to PIC/PIE, the static version of __memcpy_chk is not built,
as the test is done on PIC instead of SHARED. Fix the test to check for
SHARED, like it is done for similar functions like memmove_chk.

Changelog:
	* sysdeps/x86_64/memcpy_chk.S (__memcpy_chk): Check for SHARED
	instead of PIC.
2016-11-24 16:56:26 +01:00
Joseph Myers
c2a82dace4 Fix SH4 FP_ILOGB0 (bug 20859).
ISO C requires that the value of FP_ILOGB0 must be INT_MIN or
-INT_MAX.  In sysdeps/sh/sh4/bits/mathdef.h, it's 0x80000001; that is,
a positive unsigned value that would be -INT_MAX if converted to int,
which is not valid (there's no actual constraint on the type, but
whatever the type the integer value must be one of the two permitted,
and types other than int don't really make sense).  This patch makes
the ABI-compatible change to (-0x7fffffff).

(The testcase handles positive and negative sign separately to avoid
any issues with implicit conversions that could result in e.g. INT_MIN
converted to uintmax_t wrongly passing.)

Tested (compilation only) with build-many-glibcs.py.

	[BZ #20859]
	* sysdeps/sh/sh4/bits/mathdef.h (FP_ILOGB0): Define to
	(-0x7fffffff) instead of 0x80000001.
	* math/test-fp-ilogb-constants.c: New file.
	* math/Makefile (tests): Add test-fp-ilogb-constants.
2016-11-23 21:23:12 +00:00
Maciej W. Rozycki
f7f7931e58 MIPS: Use R_MICROMIPS_JALR rather than R_MIPS_JALR in microMIPS code
In a microMIPS compilation of `.init' code use the R_MICROMIPS_JALR
relocation intended for PIC call relaxation in microMIPS code rather
than the corresponding R_MIPS_JALR relocation meant for regular MIPS
code only.

	* sysdeps/mips/mips32/crti.S (JALR_RELOC): New macro.
	(_init): Use it in place of hardcoded R_MIPS_JALR.
	* sysdeps/mips/mips64/n32/crti.S (JALR_RELOC): New macro.
	(_init): Use it in place of hardcoded R_MIPS_JALR.
	* sysdeps/mips/mips64/n64/crti.S (JALR_RELOC): New macro.
	(_init): Use it in place of hardcoded R_MIPS_JALR.
2016-11-23 18:23:35 +00:00
Joseph Myers
56ede9ed59 Fix x86_64 -mfpmath=387 float_t, double_t (bug 20787).
Bug 20787 reports that, while float_t and double_t for 32-bit x86
properly respect -mfpmath=sse, for x86_64 they fail to reflect
-mfpmath=387, which is valid if unusual and results in FLT_EVAL_METHOD
being 2.  This patch fixes the definitions to respect
__FLT_EVAL_METHOD__ in that case, arranging for the test that the
types correspond with FLT_EVAL_METHOD to be run with both -mfpmath=387
and -mfpmath=sse.

Note: this patch will also have the effect of making float_t and
double_t be long double for x86_64 with -mfpmath=sse+387, when
FLT_EVAL_METHOD is -1.  It seems reasonable for x86_64 to be
consistent with 32-bit x86 in this case (and that definition is
conservatively safe, in that it makes the types correspond to the
widest evaluation format that might be used).

Tested for x86-64 and x86.

	[BZ #20787]
	* sysdeps/x86/bits/mathdef.h (float_t): Do not define to float if
	[__x86_64__] when __FLT_EVAL_METHOD__ is nonzero.
	(double_t): Do not define to double if [__x86_64__] when
	__FLT_EVAL_METHOD__ is nonzero.
	* sysdeps/x86/fpu/test-flt-eval-method-387.c: New file.
	* sysdeps/x86/fpu/test-flt-eval-method-sse.c: Likewise.
	* sysdeps/x86/fpu/Makefile [$(subdir) = math] (tests): Add
	test-flt-eval-method-387 and test-flt-eval-method-sse.
	[$(subdir) = math] (CFLAGS-test-flt-eval-method-387.c): New
	variable.
	[$(subdir) = math] (CFLAGS-test-flt-eval-method-sse.c): Likewise.
2016-11-23 17:56:31 +00:00
Steve Ellcey
510abe7b94 Allow [f]statfs64 to alias [f]statfs
* sysdeps/unix/sysv/linux/fstatfs64.c: Hide prototypes for fstatfs
	and __fstatfs.  Make them aliases of __fstatfs64 if
	STATFS_IS_STATFS64 is set to non-zero.
	* sysdeps/unix/sysv/linux/statfs64.c: Ditto for __statfs, statfs,
	and __statfs64.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/fstatfs.c: Do not
	define __fstatfs and fstatfs if STATFS_IS_STATFS64 is non-zero.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/statfs.c: Ditto
	for __statfs and statfs.
	* sysdeps/unix/sysv/linux/alpha/kernel_stat.h: Set STATFS_IS_STATFS64
	to 0.
	* sysdeps/unix/sysv/linux/generic/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/hppa/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/ia64/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/microblaze/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/mips/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/s390/s390-64/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/sparc/sparc32/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/sparc/sparc64/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/x86_64/kernel_stat.h: Ditto.
2016-11-22 09:59:12 -08:00
Steve Ellcey
d2e1e97332 Always define XSTAT_IS_XSTAT64
* sysdeps/unix/sysv/linux/generic/kernel_stat.h: Set XSTAT_IS_XSTAT64
	to 0 when in 32 bit mode.
	* sysdeps/unix/sysv/linux/hppa/kernel_stat.h: Set XSTAT_IS_XSTAT64 to 0.
	* sysdeps/unix/sysv/linux/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/microblaze/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/mips/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/sparc/sparc32/kernel_stat.h: Ditto.
	* sysdeps/unix/sysv/linux/fxstat.c: Replace #ifdef with #if on
	XSTAT_IS_XSTAT64 test.
	* sysdeps/unix/sysv/linux/fxstatat.c: Ditto.
	* sysdeps/unix/sysv/linux/generic/lxstat.c: Ditto.
	* sysdeps/unix/sysv/linux/generic/xstat.c: Ditto.
	* sysdeps/unix/sysv/linux/i386/fxstat.c: Ditto.
	* sysdeps/unix/sysv/linux/i386/fxstatat.c: Ditto.
	* sysdeps/unix/sysv/linux/i386/lxstat.c: Ditto.
	* sysdeps/unix/sysv/linux/i386/xstat.c: Ditto.
	* sysdeps/unix/sysv/linux/lxstat.c: Ditto.
	* sysdeps/unix/sysv/linux/mips/xstatconv.c: Ditto.
	* sysdeps/unix/sysv/linux/xstat.c: Ditto.
	* sysdeps/unix/sysv/linux/xstatconv.c: Ditto.
2016-11-21 08:23:12 -08:00
Joseph Myers
eb3c12c784 Add setpayload, setpayloadf, setpayloadl.
TS 18661-1 defines functions for manipulating the payloads of NaNs.
This patch implements the setpayload functions for glibc; these set a
number (pointed to by a function argument) to a quiet NaN with the
given payload, or to +0 if the given payload is not valid.  The
implementations are structured to allow the substance of the
implementation to be shared with the setpayloadsig functions when
those are added.

The semantics in the TS are not entirely clear in the case where the
payload passed to the function is zero (see discussion on the WG14
reflector last month).  This patch implements what seems the most
sensible interpretation, that -0 is never valid to give as the
payload, but +0 is valid in the case where the kind of NaN being
generated has its high mantissa bit set so payload 0 is actually
possible in such a NaN.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(setpayload): New declaration.
	* math/Versions (setpayload): New libm symbol at version
	GLIBC_2.25.
	(setpayloadf): Likewise.
	(setpayloadl): Likewise.
	* math/Makefile (libm-calls): Add s_setpayloadF.
	* math/libm-test.inc (struct test_Ffp_b1_data): Rename to struct
	test_Ff_b1_data.
	(RUN_TEST_Ff_b1): New macro.
	(RUN_TEST_LOOP_Ff_b1): Likewise.
	(canonicalize_test_data): Update type.
	(setpayload_test_data): New array.
	(setpayload_test): New function.
	(main): Call setpayload_test.
	* manual/arith.texi (FP Bit Twiddling): Document setpayload,
	setpayloadf and setpayloadl.
	* manual/libm-err-tab.pl: Update comment on interfaces without
	ulps tabulated.
	* sysdeps/ieee754/dbl-64/s_setpayload.c: New file.
	* sysdeps/ieee754/dbl-64/s_setpayload_main.c: Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_setpayload_main.c:
	Likewise.
	* sysdeps/ieee754/flt-32/s_setpayloadf.c: Likewise.
	* sysdeps/ieee754/flt-32/s_setpayloadf_main.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_setpayloadl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_setpayloadl_main.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_setpayloadl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_setpayloadl_main.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_setpayloadl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_setpayloadl_main.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-setpayload.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
	setpayload.
	(CFLAGS-nldbl-setpayload.c): New variable.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-11-19 00:16:28 +00:00
Adhemerval Zanella
e92bd6e362 Fix hurd __access_noerrno implementation.
This patch fixes some hurd bits from commit afcf3cd8eb that added the
__access_noerrno internal symbol.  It basically removes the nonrequired
__hurd_fail_noerrno (since the 'err' argument is ignored) and fixes
a typo for EACCES.

However, as stated on maillist [1] this __access_noerrno may still be
unsafe to run during initialization of tunables on the Hurd.  The
access_common calls __hurd_file_name_lookup, which calls
__hurd_file_name_lookup_retry, which can set errno.

[1] https://sourceware.org/ml/libc-alpha/2016-11/msg00646.html
2016-11-18 16:49:08 -02:00
Chris Metcalf
c73c7fc07c tile: create new math-tests.h header
The header makes tile use the new mechanisms for suppressing
exception and rounding support (the ROUNDING_TESTS_xxx() and
EXCEPTION_TESTS_xxx macros).

More importantly, it also now sets SNAN_TESTS_PRESERVE_PAYLOAD to 0,
since the tilegx fp hardware does not preserve NaN payloads.
2016-11-18 13:34:47 -05:00
Chris Metcalf
6933f28a64 Make tile's set_dataplane API compatibility-only
The set_dataplane() API in <sys/dataplane.h> originally supported the
Tilera version of Linux as shipped to our customers.  Once we started
upstreaming the dataplane support in the kernel, the API changed
to use fcntl() as part of the current task-isolation patch series.

It doesn't seem like continuing to support the old API is useful
for newly-compiled code, and even supporting the old glibc binary
API on an upstream kernel that supports the new task isolation mode
isn't straightforward, since the semantics have changed in ways that
make it hard to map the old semantics precisely to the new ones,
so just return ENOSYS.
2016-11-18 13:34:01 -05:00
Maciej W. Rozycki
cfaf1949ff MIPS: Add `.insn' to ensure a text label is defined as code not data
Avoid a build error with microMIPS compilation and recent versions of
GAS which complain if a branch targets a label which is marked as data
rather than microMIPS code:

../sysdeps/mips/mips32/crti.S: Assembler messages:
../sysdeps/mips/mips32/crti.S:72: Error: branch to a symbol in another ISA mode
make[2]: *** [.../csu/crti.o] Error 1

as commit 9d862524f6ae ("MIPS: Verify the ISA mode and alignment of
branch and jump targets") closed a hole in branch processing, making
relocation calculation respect the ISA mode of the symbol referred.
This allowed diagnosing the situation where an attempt is made to pass
control from code assembled for one ISA mode to code assembled for a
different ISA mode and either relaxing the branch to a cross-mode jump
or if that is not possible, then reporting this as an error rather than
letting such code build and then fail unpredictably at the run time.

This however requires the correct annotation of branch targets as code,
because the ISA mode is not relevant for data symbols and is therefore
not recorded for them.  The `.insn' pseudo-op is used for this purpose
and has been supported by GAS since:

Wed Feb 12 14:36:29 1997  Ian Lance Taylor  <ian@cygnus.com>

	* config/tc-mips.c (mips_pseudo_table): Add "insn".
	(s_insn): New static function.
	* doc/c-mips.texi: Document .insn.

so there has been no reason to avoid it where required.  More recently
this pseudo-op has been documented, by the microMIPS architecture
specification[1][2], as required for the correct interpretation of any
code label which is not followed by an actual instruction in an assembly
source.

Use it in our crti.S files then, to mark that the trailing label there
with no instructions following is indeed not a code bug and the branch
is legitimate.

References:

[1] "MIPS Architecture for Programmers, Volume II-B: The microMIPS32
    Instruction Set", MIPS Technologies, Inc., Document Number: MD00582,
    Revision 5.04, January 15, 2014, Section 7.1 "Assembly-Level
    Compatibility", p. 533

[2] "MIPS Architecture for Programmers, Volume II-B: The microMIPS64
    Instruction Set", MIPS Technologies, Inc., Document Number: MD00594,
    Revision 5.04, January 15, 2014, Section 8.1 "Assembly-Level
    Compatibility", p. 623

2016-11-18  Matthew Fortune  <Matthew.Fortune@imgtec.com>
            Maciej W. Rozycki  <macro@imgtec.com>

	* sysdeps/mips/mips32/crti.S (_init): Add `.insn' pseudo-op at
	`.Lno_weak_fn' label.
	* sysdeps/mips/mips64/n32/crti.S (_init): Likewise.
	* sysdeps/mips/mips64/n64/crti.S (_init): Likewise.
2016-11-18 12:44:04 +00:00
Adhemerval Zanella
045c13d185 Consolidate Linux setrlimit and getrlimit implementation
This patch consolidates all Linux setrlimit and getrlimit on the default
sysdeps/unix/sysv/linux/{set,get}rlimit{64}.c.  It contains two exceptions:

  1. mips32 and mips64n32 which requires a versioned symbol for GLIBC 2.19
     and higher due a broken RLIM64_INFINITY constant.
  2. sparc32 does not define a compat symbol for getrlimit64 for old 2GB
     limit. I am not sure if it is required, but a RLIM_INFINITY fix [1]
     change its definition without adding a compat symbol.  This patch does
     not aim to address this possible issue, it follow current symbol
     export.

The default implementation uses prlimit64 for 64 bit rlim_t ({set,get}rlimit64)
and if it fails with ENOSYS it fall back to {get,set}rlimit syscall.  This
code path is only used on kernel older than 2.6.36 (basically now only x86)
and I avoid to user __ASSUME_PRLIMTI64 to simplify the implementation.  Once
x86 moves to be on par with other architectures regarding minimum kernel
supported we can get rid of using old syscalls and default path.

A new type size define is added, __RLIM_T_MATCHES_RLIM64_T, where is set as
default for 64 bits ports.  This allows the default implementation to avoid
{get,set}rlimit building and alias {get,set}rlimit64 to {get,set}rlimit.

Checked on x86_64, i386, armhf, aarch64, and powerpc64le.  I also did a
sanity build plus check-abi on all other supported architectures.

[1] Commit 9c96ff2385

	Adhemerval Zanella  <adhemerval.zanella@linaro.org>
	Yury Norov  <ynorov@caviumnetworks.com>

	* bits/typesizes.h (__RLIM_T_MATCHES_RLIM64_T): define.
	* sysdeps/unix/sysv/linux/alpha/bits/typesizes.h
	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/generic/bits/typesizes.h
	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/s390/bits/typesizes.h [__s390x__]
	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/typesizes.h
	[__arch64__ || __sparcv9] (__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/x86/bits/typesizes.h [__86_64__]
	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/arm/Makefile [$(subdir) = resource]
	(sysdep_routines): Remove oldgetrlimit64.
	* sysdeps/unix/sysv/linux/i386/Makefile [$(subdir) = resource]
	(sysdep_routines): Likewise.
	* sysdeps/unix/sysv/linux/m68k/Makefile [$(subdir) = resource]
	(sysdep_routines): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile
	[$(subdir) = resource] (sysdep_routines): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/Makefile
	[$(subdir) = resource] (sysdep_routines): Likewise.
	* sysdeps/unix/sysv/linux/arm/getrlimit64.c: Remove file.
	* sysdeps/unix/sysv/linux/arm/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/hppa/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/m68k/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/m68k/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/sh/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/setrlimit64.c: Likewise.
	* sysdeps/sysv/linux/generic/wordsize-32/syscalls.list: Remove
	setrlimit and getrlimit.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/i386/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/getrlimit.c: New file.
	* sysdeps/unix/sysv/linux/sparc/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/setrlimit.c: Likewise.
	* sysdeps/unix/sysv/linux/getrlimit64.c (__getrlimit64): Handle
	__RLIM_T_MATCHES_RLIM64_T and add alias if defined.
	(__old_getrlimit64): Add compatibility symbol.
	* sysdeps/unix/sysv/linux/setrlimit64.c (__setrlimit): Likewise.
2016-11-17 15:54:22 -02:00
Joseph Myers
049cc4855a Make Alpha <sys/user.h> self-contained.
The check-installed-headers tests show up that the Alpha <sys/user.h>
is not self-contained, using size_t without including any header that
defines it.  This patch fixes it by including <stddef.h>, as done for
other architectures' versions of this header.

Tested for Alpha (compilation only).

	* sysdeps/unix/sysv/linux/alpha/sys/user.h: Include <stddef.h>.
2016-11-17 14:15:03 +00:00
Adhemerval Zanella
afcf3cd8eb New internal function __access_noerrno
Implement an internal version of __access called __access_noerrno that
avoids setting errno.  This is useful to check accessibility of files
very early on in process startup i.e. before TLS setup.  This allows
tunables to replace MALLOC_CHECK_ safely (i.e. check existence of
/etc/suid-debug to enable/disable MALLOC_CHECK) and at the same time
initialize very early so that it can override IFUNCs.

Checked on x86_64.

	* hurd/hurd.h (__hurd_fail_noerrno): New function.
	* include/unistd.h [IS_IN (rtld) || !defined SHARED]: Declare
	__access_noerrno.
	* io/access.c (__access_noerrno): New function.
	* sysdeps/mach/hurd/access.c (hurd_fail_seterrno): New function.
	(hurd_fail_seterrno): Likewise.
	(access_common): Likewise.
	(__access_noerrno): Likewise.
	* sysdeps/nacl/access.c (__access_noerrno): Likewise.
	* sysdeps/unix/sysv/linux/access.c (__access_noerrno): Likewise.
	* sysdeps/nacl/nacl-interfaces.h (NACL_CALL_NOERRNO): New
	macro.
2016-11-16 15:53:58 -02:00
Joseph Myers
530862a63e Fix SH4 register-dump.h for soft-float.
This patch fixes SH4 register-dump.h to declare a variable inside the
the build for soft-float.

Tested (compilation only) for SH4 soft-float.

	* sysdeps/unix/sysv/linux/sh/sh4/register-dump.h (register_dump):
	Only declare fpregs if [__SH_FPU_ANY__].
2016-11-16 03:45:49 +00:00
Joseph Myers
f07820b7d1 Make SH ucontext always match current kernels.
As discussed in the thread starting at
<https://sourceware.org/ml/libc-alpha/2015-06/msg00657.html>, there
are various problems with the sigcontext / mcontext / ucontext
structures on SH.  The soft-float SH4 case in fact does not build at
present, with errors processing
sysdeps/unix/sysv/linux/sh/sh4/ucontext_i.sym with gen-as-const.awk
("error: 'mcontext_t {aka struct <anonymous>}' has no member named
'fpregs'").

Linux 4.8 (commit bbe6c77857c38f4acbdc4fc70399515226d1859a) moved to
always using the same sigcontext structure on SH, with room for
floating-point registers whether or not present on the processor.
This patch makes the glibc header match.

Tested (compilation only) for sh4-linux-gnu hard float, and in
conjunction with other fixes for soft float.

	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h [__SH4__ || __SH4A__]:
	Make code unconditional.
	[!(__SH4__ || __SH4A__)]: Remove conditional code.
2016-11-15 21:44:36 +00:00
Florian Weimer
001f81ad1e s390x: Add hidden definition for __sigsetjmp 2016-11-15 15:51:01 +01:00
Joseph Myers
ba1cafea16 Make tilegx32 install libraries in lib32 directories.
This patch makes tilegx32 install libraries in lib32 directories,
matching what GCC expects and avoiding conflict with 64-bit libraries
installed in lib directories.

Tested (compilation only) for tilegx (32-bit and 64-bit, BE and LE,
GCC 5).

	* sysdeps/unix/sysv/linux/tile/tilegx/configure.ac: Use
	LIBC_SLIBDIR_RTLDDIR for tilegx32.
	* sysdeps/unix/sysv/linux/tile/tilegx/configure: Regenerated.
2016-11-14 23:34:54 +00:00
Joseph Myers
8129bf7732 Make SH <sys/user.h> self-contained.
The check-installed-headers tests show up that the SH <sys/user.h> is
not self-contained, using size_t without including any header that
defines it.  This patch fixes it by including <stddef.h>, as done for
other architectures' versions of this header.

Tested for SH3 and SH4 (compilation only).

	* sysdeps/unix/sysv/linux/sh/sys/user.h: Include <stddef.h>.
2016-11-11 21:04:28 +00:00
Chris Metcalf
a329844ff8 Make sure tilepro uses kernel atomics fo atomic_store
It's not legal for raw stores to be mixed with atomic operations
on tilepro, since the atomics are managed by kernel fast syscalls.
It's possible for a hardware store and a kernel fast atomic to race
with each other in such a way that the hardware store is lost.

Suppose you have an initial zero value, and you race with a store
of 2 and a kernel cmpxchg from 0 to 1.  The legal output is only 2:
either the store hit first and the cmpxchg failed, or the cmpxchg
hit first and succeeded, then was overwritten by the 2.  But if
the kernel cmpxchg starts first and loads the zero, then the store
hits and sets the value to 2, the cmpxchg will still decide it was
successful and write the 1, leaving the value illegally set to 1.

Using atomic_exchange variants to implement atomic_store fixes this
problem for tilepro.
2016-11-10 20:08:24 -05:00
Joseph Myers
b4e75104b4 Refactor some libm type-generic macros.
This patch refactors some type-generic libm macros, in both math.h and
math_private.h, to be based on a common __MATH_TG macro rather than
all replicating similar logic to choose a function to call based on
the type of the argument.

This should serve to illustrate what I think float128 support for such
macros should look like: common macros such as __MATH_TG may need
different definitions depending on whether float128 is supported in
glibc, so that the individual macros themselves do not need
conditionals on float128 support.

Tested for x86_64, x86, mips64 and powerpc.

	* math/math.h (__MATH_TG): New macro.
	[__USE_ISOC99] (fpclassify): Define using __MATH_TG.
	[__USE_ISOC99] (signbit): Likewise.
	[__USE_ISOC99] (isfinite): Likewise.
	[__USE_ISOC99] (isnan): Likewise.
	[__USE_ISOC99] (isinf): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (issignaling): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (__MATH_EVAL_FMT2): New macro.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (iseqsig): Define using
	__MATH_TG and __MATH_EVAL_FMT2.
	* sysdeps/generic/math_private.h (fabs_tg): Define using
	__MATH_TG.
	* sysdeps/ieee754/ldbl-128ibm/bits/iscanonical.h
	[!__NO_LONG_DOUBLE_MATH] (__iscanonicalf): New macro.
	[!__NO_LONG_DOUBLE_MATH] (__iscanonical): Likewise.
	[!__NO_LONG_DOUBLE_MATH] (iscanonical): Define using __MATH_TG.
	* sysdeps/ieee754/ldbl-96/bits/iscanonical.h (__iscanonicalf): New
	macro.
	(__iscanonical): Likewise.
	(iscanonical): Define using __MATH_TG.
2016-11-10 21:41:56 +00:00
Adhemerval Zanella
0a557c105c Fix sh4 build with __ASSUME_ST_INO_64_BIT redefinition
Since 327792c sh4 builds fails with:

../sysdeps/unix/sysv/linux/kernel-features.h:49:0: error: "__ASSUME_ST_INO_64_BIT" redefined [-Werror]
 #define __ASSUME_ST_INO_64_BIT  1
 ^
In file included from ../sysdeps/unix/sysv/linux/sysdep.h:19:0,
                 from ../sysdeps/unix/sysv/linux/sh/sysdep.h:24,
                 from ../sysdeps/unix/sysv/linux/sh/sh4/sysdep.h:4,
                 from <stdin>:1:
../sysdeps/unix/sysv/linux/sh/kernel-features.h:47:0: note: this is the location of the previous definition
 #define __ASSUME_ST_INO_64_BIT 0

It is because sh4 kernel-features.sh is included multiple times
without guards and this patch fixes by adding them.

Tested on a sh4-linux-gnu build.

	* sysdeps/unix/sysv/linux/sh/kernel-features.h: Add include
	guards.
2016-11-10 18:03:37 -02:00
Adhemerval Zanella
3e06601fed Consolidate Linux access implementation
This patch consolidates the Linux access implementation on
sysdeps/unix/sysv/linux/access.c.  Similar to auto-generation through
syscalls.list, __NR_access is check and __NR_faccessat is used only
for newer architectures (where __NR_access is not defined).

Checked on x86_64.

	* sysdeps/unix/sysv/linux/access.c: New file.
	* sysdeps/unix/sysv/linux/generic/access.c: Remove file.
2016-11-10 16:38:07 -02:00
Steve Ellcey
4589d0715c Add definitions to sysdeps/tile/tilepro/bits/wordsize.h.
* sysdeps/tile/tilepro/bits/wordsize.h: Define __WORDSIZE32_SIZE_ULONG
	and __WORDSIZE32_PTRDIFF_LONG.
2016-11-10 07:46:18 -08:00
Siddhesh Poyarekar
8f3a4687ad Regenerate ULPs for aarch64
* sysdeps/aarch64/libm-test-ulps: Regenerated.
2016-11-10 16:52:35 +05:30
Adhemerval Zanella
d4d8a12960 Consolidate Linux truncate implementations
This patch consolidates all Linux truncate implementation on
sysdeps/unix/sysv/linux/truncate{64}.c.  It is based on
{INTERNAL,INLINE}_SYSCALL patch [1] to simplify the syscall
construction.

General idea is to build ftruncate iff __OFF_T_MATCHES_OFF64_T is not
defined, otherwise ftruncate64 will be build and ftruncate will be an
alias.  The fallocate will use old compat syscall and pass 32-bit off_t
argument, while fallocate64 will handle the correct off64_t passing using
__ALIGNMENT_ARG and SYSCALL_LL64 macros.

Tested on x86_64, i386, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/arm/truncate64.c: Remove file.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/truncate.c: Likewise.
	* sysdeps/sysv/linux/generic/wordsize-32/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/truncate.c: New file.
	* sysdeps/unix/sysv/linux/truncate64.c (truncate64): Use
	INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (truncate):
	Remove.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (truncate):
	Likewise.

[1] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html
2016-11-09 17:46:17 -02:00
Adhemerval Zanella
87686aeefd Consolidate Linux ftruncate implementations
THis patch consolidates all Linux ftruncate implementation on
sysdeps/unix/sysv/linux/ftruncate{64}.c.  It is based on
{INTERNAL,INLINE}_SYSCALL patch [1] to simplify the syscall construction.

General idea is to build ftruncate iff __OFF_T_MATCHES_OFF64_T is not
defined, otherwise ftruncate64 will be build and ftruncate will be an
alias.  The fallocate will use old compat syscall and pass 32-bit off_t
argument, while fallocate64 will handle the correct off64_t passing using
__ALIGNMENT_ARG and SYSCALL_LL64 macros.

Tested on x86_64, i386, aarch64, and armhf.

	* posix/tst-truncate-common.c: New file.
	* posix/tst-truncate.c: Use tst-truncate-common.c.
	* posix/tst-truncate64.c: Likewise and add LFS tests.
	* sysdeps/unix/sysv/linux/arm/ftruncate64.c: Remove file.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate.c: Likewise.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/ftruncate.c: New file.
	* sysdeps/unix/sysv/linux/ftruncate64.c (__ftruncate64): Use
	INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros.
	[__OFF_T_MATCHES_OFF64_T] (ftruncate): Add alias.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (ftruncate):
	Remove.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (ftruncate):
	Likewise.

[1] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html
2016-11-09 17:46:11 -02:00
Joseph Myers
116ae4fe5a Add localplt.data for sh.
This patch adds a localplt.data file for sh so that test passes.  The
architecture-specific entries are for _Unwind_Find_FDE, _exit and
__errno_location.

Tested for sh3 and sh4.

	* sysdeps/unix/sysv/linux/sh/localplt.data: New file.
2016-11-08 23:43:17 +00:00
Joseph Myers
2d5a67dc89 Add localplt.data for hppa.
This patch adds a localplt.data file for hppa so that test passes.
Architecture maintainers should feel free to clean up the sysdeps code
so that some or all of the system-specific entries

libc.so: _exit
libc.so: __sigsetjmp
libc.so: _IO_funlockfile
libc.so: sigprocmask
libc.so: __errno_location
libpthread.so: __errno_location

are no longer needed.

Tested for hppa.  Note: check-execstack and check-textrel still fail;
you may wish to look at those to get to a clean baseline there (they
are less obvious for people not familiar with the architecture).

	* sysdeps/unix/sysv/linux/hppa/localplt.data: New file.
2016-11-08 23:42:36 +00:00
Joseph Myers
58d6b0d865 Update alpha localplt.data.
This patch updates alpha localplt.data so the localplt test passes in
my compile-only all-ABIs glibc testing.  The failures I see without
this patch are:

Missing required PLT reference: ld.so: __tls_get_addr
Missing required PLT reference: ld.so: free

Now, __tls_get_addr can be made optional.  For free, rather than
making it optional as in libc.so it seems better to mark all the
malloc-related symbols in both libc.so and ld.so as allowing an
R_ALPHA_GLOB_DAT relocation as an alternative to using a PLT entry, so
this patch does so.

Tested for alpha.

	* sysdeps/unix/sysv/linux/alpha/localplt.data: Make __tls_get_addr
	optional in ld.so.  Allow R_ALPHA_GLOB_DAT relocation for malloc,
	calloc, realloc, free, memalign and __libc_memalign rather than
	making them optional.
2016-11-08 23:41:51 +00:00
Joseph Myers
38d84a0f37 Update nios2 localplt.data.
This patch updates nios2 localplt.data so the localplt test passes in
my compile-only all-ABIs glibc testing.  A new PLT entry for
__extendsfdf2 is added.

Tested for nios2.

	* sysdeps/unix/sysv/linux/nios2/localplt.data: Add __extendsfdf2
	for libc.so.
2016-11-08 23:41:05 +00:00
Adhemerval Zanella
3c7f1f59cd Consolidate lseek/lseek64/llseek implementations
This patch consolidates all Linux lseek/lseek64/llseek implementation
in on on sysdeps/unix/sysv/linux/lseek{64}.c.  It also removes the llseek
file and instead consolidate the LFS lseek implementation on lseek64.c
as for other LFS symbols implementations.

The general idea is:

  - lseek: ABIs that not define __OFF_T_MATCHES_OFF64_T will preferable
  use __NR__llseek if kernel supports it, otherwise they will use __NR_lseek.
  ABIs that defines __OFF_T_MATCHES_OFF64_T won't produce any symbol.

  - lseek64: ABIs with __OFF_T_MATCHES_OFF64_T will preferable use __NR_lseek
  (since it will use 64-bit arguments without low/high splitting) and
  __NR__llseek if __NR_lseek is not defined (for some ILP32 ports).

  - llseek: files will be removed and symbols will be aliased ot lseek64.

ABI without __OFF_T_MATCHES_OFF64_T and without __NR_llseek (basically MIPS64n32
so far) are covered by building lseek with off_t as expected and lseek64
using __NR_lseek (as expected for off64_t being passed using 64-bit registers).

For this consolidation I mantained the x32 assembly specific implementation
because to correctly fix this it would required both the x32 fix for
{INLINE,INTERNAL}_SYSCALL [1] and a wrapper to correctly subscribe it to
return 64 bits instead of default 32 bits (as for times).  It could a future
cleanup.

It is based on my previous {INTERNAL,INLINE}_SYSCALL_CALL macro [2],
although it is mainly for simplification.

Tested on x86_64, i686, aarch64, armhf, and powerpc64le.

	* nptl/Makefile (libpthread-routines): Remove ptw-llseek and add
	ptw-lseek64.
	* sysdeps/unix/sysv/linux/Makefile (sysdeps_routines): Remove llseek.
	* sysdeps/unix/sysv/linux/alpha/Makefile  (sysdeps_routines):
	Likewise.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/llseek.c: Remove file.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/lseek.c: Remove file.
	* sysdeps/unix/sysv/linux/mips/mips64/llseek.c: Likewise.
	* sysdeps/unix/sysv/linux/llseek.c: Remove file.
	* sysdeps/unix/sysv/linux/lseek.c: New file.
	* sysdeps/unix/sysv/linux/lseek64.c: Add default Linux implementation.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list: Remove lseek and
	__libc_lseek64 from auto-generation.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/lseek64.S: New file.

[1] https://sourceware.org/ml/libc-alpha/2016-08/msg00443.html
[2] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html
2016-11-08 16:04:33 -02:00
Steve Ellcey
327792ce57 Define __ASSUME_ST_INO_64_BIT on all platforms.
* sysdeps/unix/sysv/linux/alpha/kernel-features.h: #define
	  __ASSUME_ST_INO_64_BIT as 0
	* sysdeps/unix/sysv/linux/sh/kernel-features.h: Likewise.
	* sysdeps/unix/sysv/linux/fxstat64.c: Replace #ifdef with #if
	  over the code where __ASSUME_ST_INO_64_BIT is used.
	* sysdeps/unix/sysv/linux/lxstat64.c: Likewise.
	* sysdeps/unix/sysv/linux/xstat64.c: Likewise.
	* sysdeps/unix/sysv/linux/xstatconv.c: Likewise.
2016-11-07 13:26:27 -08:00
Florian Weimer
c74940f2a7 nptl: Document the reason why __kind in pthread_mutex_t is part of the ABI 2016-11-07 20:24:32 +01:00
Adhemerval Zanella
6d1774146f Fix sparc build due missing __WORDSIZE_TIME64_COMPAT32 definition
This patch adds the missing Linux sparc definitions from d060cd0.
Both value are copied from default sparc value [1] and with this
fix now both sparc 32 and 64 bits builds on Linux.

	* sysdeps/unix/sysv/linux/sparc/bits/wordsize.h
	(__WORDSIZE_TIME64_COMPAT32): Define for both 32 and  64 bits.

[1] sysdeps/sparc/sparc{32,64}/bits/wordsize.h
2016-11-04 18:10:42 -02:00
Joseph Myers
860aacdad2 Fix alpha sqrt fegetenv namespace (bug 20768).
On alpha, sqrt (a C90 function) brings in references to fegetenv
(C99), resulting in linknamespace test failures:

[initial] __sqrt -> [libm.a(w_sqrt.o)] __ieee754_sqrt ->
[libm.a(e_sqrt.o)] __feholdexcept -> [libm.a(feholdexcpt.o)] fegetenv

This patch fixes this by making __feholdexcept call __fegetenv instead
of fegetenv.

Tested for Alpha (compilation only).

	[BZ #20768]
	* sysdeps/alpha/fpu/feholdexcpt.c (__feholdexcept): Call
	__fegetenv instead of fegetenv.
2016-11-04 17:19:13 +00:00
Joseph Myers
799131036e Do not hardcode platform names in manual/libm-err-tab.pl (bug 14139).
manual/libm-err-tab.pl hardcodes a list of names for particular
platforms (mapping from sysdeps directory name to friendly name for
the manual).  This goes against the principle of keeping information
about individual platforms in their corresponding sysdeps directory,
and the list is also very out-of-date regarding supported platforms
and their corresponding sysdeps directories.

This patch fixes this by adding a libm-test-ulps-name file alongside
each libm-test-ulps file.  The script then gets the friendly name from
that file, which is required to exist, so it no longer needs to allow
for the mapping being missing.

Tested for x86_64.

	[BZ #14139]
	* manual/libm-err-tab.pl (%pplatforms): Initialize to empty.
	(find_files): Obtain platform name from libm-test-ulps-name and
	store in %pplatforms.
	(canonicalize_platform): Remove.
	(print_platforms): Use $pplatforms directly.
	(by_platforms): Do not allow for platforms missing from
	%pplatforms.
	* sysdeps/aarch64/libm-test-ulps-name: New file.
	* sysdeps/alpha/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/arm/libm-test-ulps-name: Likewise.
	* sysdeps/generic/libm-test-ulps-name: Likewise.
	* sysdeps/hppa/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps-name: Likewise.
	* sysdeps/ia64/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/m68k/coldfire/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/m68k/m680x0/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/microblaze/libm-test-ulps-name: Likewise.
	* sysdeps/mips/mips32/libm-test-ulps-name: Likewise.
	* sysdeps/mips/mips64/libm-test-ulps-name: Likewise.
	* sysdeps/nios2/libm-test-ulps-name: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/powerpc/nofpu/libm-test-ulps-name: Likewise.
	* sysdeps/s390/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/sh/libm-test-ulps-name: Likewise.
	* sysdeps/sparc/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/tile/libm-test-ulps-name: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps-name: Likewise.
2016-11-04 16:49:06 +00:00
Joseph Myers
94bf0b4ac9 Make MIPS <sys/user.h> self-contained.
The check-installed-headers tests show up that the MIPS <sys/user.h>
is not self-contained, using size_t without including any header that
defines it.  This patch fixes it by including <stddef.h>, as done for
other architectures' versions of this header.

Tested for MIPS (all 24 ABIs, compilation only).

	* sysdeps/unix/sysv/linux/mips/sys/user.h: Include <stddef.h>.
2016-11-04 16:44:23 +00:00
Joseph Myers
7672e712e1 XFAIL check-execstack for MIPS.
This patch marks the check-execstack test as expected to fail for
MIPS, with a comment referencing previous RFC discussion of the
changes that would be needed to support non-executable stacks on MIPS.

Tested for MIPS (all 24 ABIs).

	* sysdeps/unix/sysv/linux/mips/Makefile [$(subdir) = elf]
	(test-xfail-check-execstack): New variable.
2016-11-04 16:42:37 +00:00
Joseph Myers
a2049e7ab2 Add localplt.data for MIPS.
This patch adds a localplt.data file for MIPS, reflecting the
peculiarities of MIPS ELF that mean this test cannot detect PLT
entries (there aren't any in shared libraries), not GOT entries
(because of the implicit relocation).

Tested for MIPS (all 24 ABIs).

	* sysdeps/mips/localplt.data: New file.
2016-11-04 16:40:54 +00:00
Steve Ellcey
d060cd002d Define wordsize.h macros everywhere
* bits/wordsize.h: Add documentation.
	* sysdeps/aarch64/bits/wordsize.h : New file
	* sysdeps/generic/stdint.h (PTRDIFF_MIN, PTRDIFF_MAX): Update
	definitions.
	(SIZE_MAX): Change ifdef to if in __WORDSIZE32_SIZE_ULONG check.
	* sysdeps/gnu/bits/utmp.h (__WORDSIZE_TIME64_COMPAT32): Check
	with #if instead of #ifdef.
	* sysdeps/gnu/bits/utmpx.h (__WORDSIZE_TIME64_COMPAT32): Ditto.
	* sysdeps/mips/bits/wordsize.h (__WORDSIZE32_SIZE_ULONG,
	__WORDSIZE32_PTRDIFF_LONG, __WORDSIZE_TIME64_COMPAT32):
	Add or change defines.
	* sysdeps/powerpc/powerpc32/bits/wordsize.h: Likewise.
	* sysdeps/powerpc/powerpc64/bits/wordsize.h: Likewise.
	* sysdeps/s390/s390-32/bits/wordsize.h: Likewise.
	* sysdeps/s390/s390-64/bits/wordsize.h: Likewise.
	* sysdeps/sparc/sparc32/bits/wordsize.h: Likewise.
	* sysdeps/sparc/sparc64/bits/wordsize.h: Likewise.
	* sysdeps/tile/tilegx/bits/wordsize.h: Likewise.
	* sysdeps/tile/tilepro/bits/wordsize.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/wordsize.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/wordsize.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/wordsize.h: Likewise.
	* sysdeps/wordsize-32/bits/wordsize.h: Likewise.
	* sysdeps/wordsize-64/bits/wordsize.h: Likewise.
	* sysdeps/x86/bits/wordsize.h: Likewise.
2016-11-04 09:37:44 -07:00
Wilco Dijkstra
95e431cc73 An optimized memchr was missing for AArch64. This version is similar to
strchr and is significantly faster than the C version.

2016-11-04  Wilco Dijkstra  <wdijkstr@arm.com>
	    Kevin Petit  <kevin.petit@arm.com>

	* sysdeps/aarch64/memchr.S (__memchr): New file.
2016-11-04 14:37:10 +00:00
Joseph Myers
9a2835df5c Handle tilegx* machine names.
This patch makes sysdeps/tile/preconfigure handle tilegx* machine
names instead of just plain tilegx.  That matches GCC, and in
particular allows a big-endian toolchain to use the tilegxbe-linux-gnu
name when configuring both GCC and glibc.

Tested with compilation for tilegxbe-linux-gnu, both 32-bit and 64-bit
(building a subsequent GCC against that glibc still falls over because
of both 32-bit and 64-bit libraries going in the lib directory, as
noted at
<https://sourceware.org/ml/libc-alpha/2016-11/msg00129.html>).

	* sysdeps/tile/preconfigure: Accept tilegx* instead of tilegx.
2016-11-04 13:32:06 +00:00
Brent W. Baccala
561ff1ec42 hurd: Fix spurious port deallocation
* sysdeps/mach/hurd/dl-sysdep.c (__mmap): Do not deallocate memobj_wr
when it is MACH_PORT_NULL.
2016-10-31 17:32:25 +01:00
Tulio Magno Quites Machado Filho
739e14f900 Document a behavior of an elided pthread_rwlock_unlock
Explain that pthread_rwlock_unlock may crash if called on a lock not
held by the current thread.
2016-10-28 19:13:21 -02:00
Tulio Magno Quites Machado Filho
ce193f551e powerpc: Fix TOC stub on powerpc64 clone()
Use a function call to _exit() so that the linker can create a TOC stub
instead of just a branch.

Tested on powerpc64.
2016-10-28 19:13:21 -02:00
Florian Weimer
09472915dd crypt: Use internal names for the SHA-2 block functions
These functions are externally visible with a static libcrypt
library.
2016-10-28 21:49:21 +02:00
H.J. Lu
0e6d3adc60 Check IFUNC definition in unrelocated shared library [BZ #20019]
Calling an IFUNC function defined in unrelocated shared library may
lead to segfault.  This patch issues an error message to request
relinking the shared library if it references IFUNC function defined
in the unrelocated shared library.

	[BZ #20019]
	* sysdeps/i386/dl-machine.h (elf_machine_rel): Check IFUNC
	definition in unrelocated shared library.
	* sysdeps/x86_64/dl-machine.h (elf_machine_rela): Likewise.
2016-10-28 09:12:15 -07:00
Florian Weimer
6b1df8b27f i386: Support CFLAGS which imply -fno-omit-frame-pointer [BZ #20729] 2016-10-28 17:09:09 +02:00
David S. Miller
61668b22f5 Fix a sparc header conformtest failure.
* sysdeps/unix/sysv/linux/sparc/sys/user.h: Include stddef.h
2016-10-27 07:57:49 -07:00
Joseph Myers
eaf5ad0bc4 Add canonicalize, canonicalizef, canonicalizel.
TS 18661-1 defines canonicalize functions to produce a canonical
version of a floating-point representation.  This patch implements
these functions for glibc.

As with the iscanonical macro, these functions are oriented to the
decimal floating-point case, where some values have both canonical and
noncanonical representations.  However, the functions have a return
value that says whether they succeeded in storing a canonical result;
thus, they can fail for the case of an invalid representation (while
still not making any particular choice from among multiple equally
canonical valid representations of the same value).  Since no
floating-point formats in glibc actually have noncanonical valid
representations, a type-generic implementation of these functions can
be used that expects iscanonical to return 0 only for invalid
representations.  Now that iscanonical is used within libm.so,
libm_hidden_proto / libm_hidden_def are added for __iscanonicall.

The definition of these functions is intended to correspond to a
convertFormat operation to the same floating-point format.  Thus, they
convert signaling NaNs to quiet NaNs, raising the "invalid" exception.
Such a conversion "should" produce "the canonical version of that
signaling NaN made quiet".

libm-test.inc is made to check NaN payloads for the output of these
functions, a new feature (at some point manipulation functions such as
fabs and copysign should have tests added that verify payload
preservation for them).  As however some architectures may not follow
the recommended practice of preserving NaN payloads when converting a
signaling NaN to quiet, a new math-tests.h macro
SNAN_TESTS_PRESERVE_PAYLOAD is added, and defined to 0 for non-NAN2008
MIPS; any other architectures seeing test failures for lack of payload
preservation in this case should also define this macro to 0.  (If any
cases arise where the sign isn't preserved either, those should have a
similar macro added.)

The ldbl-96 and ldbl-128ibm tests of iscanonical are renamed and
adapted to test canonicalizel as well on the same representations.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(canonicalize): New declaration.
	* math/Versions (canonicalize): New libm symbol at version
	GLIBC_2.25.
	(canonicalizef): Likewise.
	(canonicalizel): Likewise.
	* math/Makefile (gen-libm-calls): Add s_canonicalizeF.
	* math/s_canonicalize_template.c: New file.
	* math/libm-test.inc: Update comment on functions tested and
	testing of NaN payloads.
	(TEST_NAN_PAYLOAD): New macro.
	(NO_TEST_INLINE): Update value.
	(XFAIL_TEST): Likewise.
	(ERRNO_UNCHANGED): Likewise.
	(ERRNO_EDOM): Likewise.
	(ERRNO_ERANGE): Likewise.
	(IGNORE_RESULT): Likewise.
	(NON_FINITE): Likewise.
	(TEST_SNAN): Likewise.
	(NO_TEST_MATHVEC): Likewise.
	(TEST_NAN_PAYLOAD_CANONICALIZE): New macro.
	(check_float_internal): Check NaN payloads if TEST_NAN_PAYLOAD.
	(struct test_Ffp_b1_data): New type.
	(RUN_TEST_Ffp_b1): New macro.
	(RUN_TEST_LOOP_Ffp_b1): Likewise.
	(canonicalize_test_data): New array.
	(canonicalize_test): New function.
	(main): Call canonicalize_test.
	* manual/arith.texi (FP Bit Twiddling): Document canonicalize,
	canonicalizef and canonicalizel.
	* manual/libm-err-tab.pl: Update comment on interfaces without
	ulps tabulated.
	* sysdeps/ieee754/ldbl-opt/nldbl-canonicalize.c: New file.
	* sysdeps/ieee754/ldbl-opt/s_canonicalizel.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
	canonicalize.
	(CFLAGS-nldbl-canonicalize.c): New variable.
	* sysdeps/ieee754/ldbl-128ibm/test-iscanonical-ldbl-128ibm.c: Move
	to ...
	* sysdeps/ieee754/ldbl-128ibm/test-canonical-ldbl-128ibm.c:
	... here.
	(do_test): Also test canonicalizel.
	* sysdeps/ieee754/ldbl-128ibm/Makefile (tests): Change
	test-iscanonical-ldbl-128ibm to test-canonical-ldbl-128ibm.
	* sysdeps/ieee754/ldbl-128ibm/include/bits/iscanonical.h: New
	file.
	* sysdeps/ieee754/ldbl-128ibm/s_iscanonicall.c (__iscanonicall):
	Use libm_hidden_def.
	* sysdeps/ieee754/ldbl-96/test-iscanonical-ldbl-96.c: Move to ...
	* sysdeps/ieee754/ldbl-96/test-canonical-ldbl-96.c: ... here.
	(do_test): Also test canonicalizel.
	* sysdeps/ieee754/ldbl-96/Makefile (tests): Change
	test-iscanonical-ldbl-96 to test-canonical-ldbl-96.
	* sysdeps/ieee754/ldbl-96/include/bits/iscanonical.h: New file.
	* sysdeps/ieee754/ldbl-96/s_iscanonicall.c (__iscanonicall): Use
	libm_hidden_def.
	* sysdeps/generic/math-tests.h (SNAN_TESTS_PRESERVE_PAYLOAD): New
	macro.
	* sysdeps/mips/math-tests.h [__mips_hard_float && !__mips_nan2008]
	(SNAN_TESTS_PRESERVE_PAYLOAD): Likewise.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-26 23:14:31 +00:00
Joseph Myers
873febb5df Add getpayloadl to libnldbl.
This patch adds getpayloadl to libnldbl, missed in my patch that
originally implemented getpayload functions.

Tested for powerpc.

	* sysdeps/ieee754/ldbl-opt/nldbl-getpayload.c: New file.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
	getpayload.
	(CFLAGS-nldbl-getpayload.c): New variable.
2016-10-26 17:10:00 +00:00
Gabriel F. T. Gomes
6962682ffe Add strfromd, strfromf, and strfroml functions
ISO/IEC TS 18661-1 adds several functions in the strfrom family to stdlib.
This patch adds strfromd, strfromf, and strfroml.  This is being done in
preparation for the new floating-point type, float128.  The added functions
convert a floating-point value into a string, with configurable format.
2016-10-25 17:03:54 -02:00
Joseph Myers
78b7adbaea Fix cmpli usage in power6 memset.
Building glibc for powerpc64 with recent (2.27.51.20161012) binutils,
with multi-arch enabled, I get the error:

../sysdeps/powerpc/powerpc64/power6/memset.S: Assembler messages:
../sysdeps/powerpc/powerpc64/power6/memset.S:254: Error: operand out of range (5 is not between 0 and 1)
../sysdeps/powerpc/powerpc64/power6/memset.S:254: Error: operand out of range (128 is not between 0 and 31)
../sysdeps/powerpc/powerpc64/power6/memset.S:254: Error: missing operand

Indeed, cmpli is documented as a four-operand instruction, and looking
at nearby code it seems likely cmpldi was intended.  This patch fixes
this powerpc64 code accordingly, and makes a corresponding change to
the powerpc32 code.

Tested for powerpc, powerpc64 and powerpc64le by Tulio Magno Quites
Machado Filho

	* sysdeps/powerpc/powerpc32/power6/memset.S (memset): Use cmplwi
	instead of cmpli.
	* sysdeps/powerpc/powerpc64/power6/memset.S (memset): Use cmpldi
	instead of cmpli.
2016-10-25 15:54:16 +00:00
Yury Norov
20973cf442 * sysdeps/unix/sysv/linux/fxstat.c: Remove useless cast.
* sysdeps/unix/sysv/linux/lxstat.c: Likewise.
	* sysdeps/unix/sysv/linux/xstat.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/fxstat.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/lxstat.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/xstat.c: Likewise.
2016-10-24 14:36:53 -07:00
Adhemerval Zanella
2152cf7eda Fix Linux sh4 pread/pwrite argument passing
Although conceptually correct for p{read,write}{64} offset argument passing,
sh4 implementation does not generate the correct expected code.  The
__ALIGNMENT_ARG redefinition is incorrect for two reasons: 1. the
kernel-features.h header is included multiple times (since it contains no
guards) and 2. the value it redefines is also incorrect (should be '0, '
instead of empty definition).

This patch fixes it by adding another macro, SYSCALL_LL_PRW{64}, meant to be
used to pass the offset argument on p{read,write}64.  It is basically the
already define SYSCALL_LL{64} plus __ALIGNMENT_ARG unless __ASSUME_PRW_DUMMY_ARG
is define.  In this case an empty dummy argument is used regardless how
__ALIGNMENT_ARG is defined (sh4 case).

Checked on x86_64, i686, aarch64, armhf, and powerpc64le (basically a sanity
check).  Also, John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> and
James Clarke <jrtc27@jrtc27.com> help me check on a debian sh4 bootstrap using
2.24 plus this patch to verify it also corrected fixed the regression issue.

I also verified the generated object for a 2.24 build and master with this
patch for sh4 and both look identical.

	* sysdeps/unix/sysv/linux/pread.c (__libc_pread): Use SYSCALL_LL_PRW.
	* sysdeps/unix/sysv/linux/pwrite.c (__libc_pwrite): Likewise.
	* sysdeps/unix/sysv/linux/pread64.c (__libc_pread64): Use
	SYSCALL_LL64_PRW.
	* sysdeps/unix/sysv/linux/pwrite64.c (__libc_pwrite64): Likewise.
	* sysdeps/unix/sysv/linux/sh/kernel-features.h: Define
	__ASSUME_PRW_DUMMY_ARG.
	* sysdeps/unix/sysv/linux/sh/pread.c: Remove file.
	* sysdeps/unix/sysv/linux/sh/pread64.c: Likewise.
	* sysdeps/unix/sysv/linux/sh/pwrite.c: Likewise.
	* sysdeps/unix/sysv/linux/sh/pwrite64.c: Likewise.
	* sysdeps/unix/sysv/linux/sysdep.h: Define SYSCALL_LL_PRW and
	SYSCALL_LL_PRW64 based on __ASSUME_PRW_DUMMY_ARG.
2016-10-24 15:26:42 -02:00
Steve Ellcey
93f9416301 Fix -Wformat-length warning in tst-setgetname.c
* sysdeps/unix/sysv/linux/tst-setgetname.c: Increase buffer size.
2016-10-24 09:43:54 -07:00
Paul Murphy
84d74e427a powerpc: Cleanup fenv_private.h
Some of the masks are wrong, and the naming is confusing.

There are two basic cases we really care about:

1. Stacking a new rounding mode when running certain
   sections of code, and pausing exception handling.

2. Likewise, but discarding any exceptions which occur
   while running under the new rounding mode.

libc_feholdexcept_setround_ppc_ctx has been removed as it basically
does the same thing as libc_feholdsetround_ppc_ctx but also clearing
any sticky bits.  The restore behavior is what differentiates these
two cases as the SET_RESTORE_ROUND{,_NOEX} macros will either merge
or discard all exceptions occurring during scope of their usage.

Likewise, there are a number of routines to swap, replace,
or merge FP environments.  This change reduces much of
the common and sometimes wrong code.

Tested on ppc64le, with results before and after.
2016-10-21 16:40:03 -02:00
Joseph Myers
0f04fc07f6 Use VSQRT instruction for ARM sqrt (bug 20660).
This patch makes ARM sqrt and sqrtf use the VSQRT VFP square root
instruction when available, instead of much larger generic code for
computing square roots.

Now, GCC will normally inline sqrt calls except for negative arguments
where errno needs to be set, and because the benchtests fail to use
-fno-builtin that means no significant difference in benchmark results
for sqrt (note, however, there are lots of __ieee754_sqrt calls
internally in libm, which are *not* inlined - although some
architectures define __ieee754_sqrt in their math_private.h for that
purpose, ARM doesn't - so improving out-of-line sqrt performance is
still relevant to those other functions, if not for most ordinary
direct users of sqrt).  With the benchtests changed to use
-fno-builtin for sqrt tests, typical performance results before the
change are ("max" is wildly varying in any case):

    "duration": 9.88358e+09,
    "iterations": 4.8783e+07,
    "max": 457.764,
    "min": 183.105,
    "mean": 202.603

and after it are:

    "duration": 9.45663e+09,
    "iterations": 2.24385e+08,
    "max": 274.659,
    "min": 30.517,
    "mean": 42.1447

Tested for ARM (hard-float and soft-float).

	[BZ #20660]
	* sysdeps/arm/e_sqrt.c: New file.
	* sysdeps/arm/e_sqrtf.c: Likewise.
2016-10-20 23:24:44 +00:00
Joseph Myers
05f3ed0a79 Stop powerpc copysignl raising "invalid" for sNaN argument (bug 20718).
The powerpc (hard-float) implementations of copysignl, both 32-bit and
64-bit, raise spurious "invalid" exceptions when the first argument is
a signaling NaN.  copysign functions should never raise exceptions
even for signaling NaNs.

The problem is the use of an fcmpu instruction to test the sign of the
high part of the long double argument.  This patch fixes the functions
to use fsel instead (as used for fabsl following my fixes for a
similar bug there), or to examine the integer representation for older
32-bit processors without fsel.

Tested for powerpc64 and powerpc32 (configurations with and without
fsel used).

	[BZ #20718]
	* sysdeps/powerpc/powerpc32/fpu/s_copysignl.S (__copysignl): Do
	not use floating-point comparisons to test sign.
	* sysdeps/powerpc/powerpc64/fpu/s_copysignl.S (__copysignl):
	Likewise.
2016-10-19 22:58:34 +00:00
Joseph Myers
f8e8b8ed9f Add getpayload, getpayloadf, getpayloadl.
TS 18661-1 defines functions for manipulating the payloads of NaNs.
This patch implements the getpayload functions for glibc; these
extract the NaN payload (from an argument passed as a pointer, for
which corresponding libm-test support is added) and return it in the
same floating-point type.  The return value of these functions is
unspecified for non-NaN arguments; the patch does the simplest thing
to implement, which is that the functions do not check whether the
argument is a NaN and just treat the relevant bits of the
representation as a payload regardless.  A conversion from integer to
floating-point is used to produce the required return value, except in
the ldbl-128 case; as 128-bit integers are not supported for all
configurations using ldbl-128, the code constructs the required
floating-point representation of the return value directly instead.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(getpayload): New declaration.
	* math/Versions (getpayload): New libm symbol at version
	GLIBC_2.25.
	(getpayloadf): Likewise.
	(getpayloadl): Likewise.
	* math/Makefile (libm-calls): Add s_getpayloadF.
	* math/libm-test.inc: Include <nan-high-order-bit.h>.
	(struct test_f_f_data): Add comment.
	(RUN_TEST_fp_f): New macro.
	(RUN_TEST_LOOP_fp_f): Likewise.
	(getpayload_test_data): New array.
	(getpayload_test): New function.
	(main): Call getpayload_test.
	* math/gen-libm-test.pl (parse_args): Handle 'p' in argument
	descriptor.
	* manual/arith.texi (FP Bit Twiddling): Document getpayload,
	getpayloadf and getpayloadl.
	* manual/libm-err-tab.pl: Update comment on interfaces without
	ulps tabulated.
	* sysdeps/ieee754/dbl-64/s_getpayload.c: New file.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_getpayload.c: Likewise.
	* sysdeps/ieee754/flt-32/s_getpayloadf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_getpayloadl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_getpayloadl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_getpayloadl.c: Likewise.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-19 01:49:09 +00:00
Adhemerval Zanella
a9bfffe593 Fix Linux fallocate tests for EOPNOTSUPP
The fallocate syscall might fail on Linux due missing support from
underlying filesystem (for instance some NFS versions).  This patch
adds this check for fallocate tests.  It also moves tst-fallocate{64}
to 'io' folder (since it is on fallocate{64} is built).

Checked on x86_64.

	* sysdeps/unix/sysv/linux/Makefile [$(subdir) = math] (tests): Move
	tst-fallocate{64}.
	* sysdeps/unix/sysv/linux/tst-fallocate-common.c: Check for EOPNOTSUPP
	on syscall return.
2016-10-18 08:56:22 -02:00
Carlos O'Donell
b3d17c1cf2 Bug 20689: Fix FMA and AVX2 detection on Intel
In the Intel Architecture Instruction Set Extensions Programming
reference the recommended way to test for FMA in section
'2.2.1 Detection of FMA' is:

"Application Software must identify that hardware supports AVX as
explained in ... after that it must also detect support for FMA..."

We don't do that in glibc. We use osxsave to detect the use of xgetbv,
and after that we check for AVX and FMA orthogonally. It is conceivable
that you could have the AVX bit clear and the FMA bit in an undefined
state.

This commit fixes FMA and AVX2 detection to depend on usable AVX
as required by the recommended Intel sequences.

v1: https://www.sourceware.org/ml/libc-alpha/2016-10/msg00241.html
v2: https://www.sourceware.org/ml/libc-alpha/2016-10/msg00265.html
2016-10-17 19:39:54 -04:00
Joseph Myers
6f322a8947 Define HIGH_ORDER_BIT_IS_SET_FOR_SNAN to 0 or 1.
This patch moves the HIGH_ORDER_BIT_IS_SET_FOR_SNAN macro from being
defined or undefined to the preferred convention of always being
defined, to either 0 or 1, so allowing typo-proof tests with #if.

The macro is moved from math_private.h to a new header
nan-high-order-bit.h to make it easy for all architectures to define,
either through the sysdeps/generic version of the header or through
providing their own version of the header, without needing #ifndef in
the generic math_private.h to give a default definition.  The move
also allows the macro to be used without needing math_private.h to be
included; the immediate motivation of this patch is to allow tests to
access this information (to know what kinds of NaNs 0 is a valid
payload for) without needing to include math_private.h.  Existing
C level rather than preprocessor conditionals at all, but this patch
does not make such a change).

Tested for x86_64 and x86 (testsuite); also verified for x86_64, x86,
mips64 and powerpc that installed stripped shared libraries are
unchanged by the patch.

	* sysdeps/generic/nan-high-order-bit.h: New file.
	* sysdeps/hppa/nan-high-order-bit.h: Likewise.
	* sysdeps/mips/nan-high-order-bit.h: Likewise.
	* sysdeps/hppa/math_private.h: Remove file.
	* sysdeps/mips/math_private.h (HIGH_ORDER_BIT_IS_SET_FOR_SNAN): Do
	not define here.
	* sysdeps/ieee754/dbl-64/s_issignaling.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/dbl-64/s_totalorder.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/dbl-64/s_totalordermag.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_issignaling.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_totalordermag.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/flt-32/s_issignalingf.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/flt-32/s_totalorderf.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/flt-32/s_totalordermagf.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/ldbl-128/s_issignalingl.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/ldbl-128/s_totalorderl.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/ldbl-128/s_totalordermagl.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/ldbl-128ibm/s_issignalingl.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/ldbl-128ibm/s_totalorderl.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/ldbl-96/s_issignalingl.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/ldbl-96/s_totalorderl.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
	* sysdeps/ieee754/ldbl-96/s_totalordermagl.c: Include
	<nan-high-order-bit.h>.
	[HIGH_ORDER_BIT_IS_SET_FOR_SNAN]: Test with #if not #ifdef.
2016-10-17 22:48:51 +00:00
Stefan Liebler
8e36adc08e S390: Fix fp comparison not raising FE_INVALID.
As gcc is using unordered comparison instructions which do not
raise invalid exception if any operand is quiet NAN,
FIX_COMPARE_INVALID is defined to 1.
Thus iseqsig is calling feraiseexcept as workaround.
2016-10-17 10:37:11 +02:00
John David Anglin
7cfde84069 hppa: Optimize atomic_compare_and_exchange_val_acq
Changelog:
	* sysdeps/unix/sysv/linux/hppa/atomic-machine.h: Don't include
	abort-instr.h.
	(EFAULT): Remove conditional define.
	(ENOSYS): Likewise.
	(atomic_compare_and_exchange_val_acq): Use instruction nullification
	instead of conditional branch instructions.
2016-10-15 19:22:43 +02:00
Joseph Myers
cc6a8d7457 Add totalordermag, totalordermagf, totalordermagl.
In addition to the totalorder functions, TS 18661-1 defines
totalordermag functions, which do the same comparison but on the
absolute values of the arguments.  This patch implements these
functions for glibc, including the type-generic macro in <tgmath.h>.
In general the implementations are similar to but simpler than those
for the totalorder functions.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(totalordermag): New declaration.
	* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (totalordermag):
	New macro.
	* math/Versions (totalordermag): New libm symbol at version
	GLIBC_2.25.
	(totalordermagf): Likewise.
	(totalordermagl): Likewise.
	* math/Makefile (libm-calls): Add s_totalordermagF.
	* math/libm-test.inc (totalordermag_test_data): New array.
	(totalordermag_test): New function.
	(main): Call totalordermag_test.
	* math/test-tgmath.c (NCALLS): Increase to 125.
	(F(compile_test)): Call totalordermag.
	(F(totalordermag)): New function.
	* manual/arith.texi (FP Comparison Functions): Document
	totalordermag, totalordermagf and totalordermagl.
	* manual/libm-err-tab.pl: Update comment on interfaces without
	ulps tabulated.
	* sysdeps/ieee754/dbl-64/s_totalordermag.c: New file.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_totalordermag.c: Likewise.
	* sysdeps/ieee754/flt-32/s_totalordermagf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_totalordermagl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_totalordermagl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-totalordermag.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
	totalordermag.
	(CFLAGS-nldbl-totalordermag.c): New variable.
	* sysdeps/ieee754/ldbl-128ibm/test-totalorderl-ldbl-128ibm.c
	(do_test): Also test totalordermagl.
	* sysdeps/ieee754/ldbl-96/test-totalorderl-ldbl-96.c (do_test):
	Likewise.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-15 00:36:48 +00:00
steve ellcey-CA Eng-Software
e223d1fe72 Fix warnings from latest GCC.
* sysdeps/ieee754/dbl-64/e_pow.c (checkint) Make conditions explicitly
	boolean.
2016-10-14 12:53:27 -07:00
Adhemerval Zanella
7164580495 Fix posix_fadvise64 build on mips64n64
Recent binutils versions (at least 2.27) complains about libc.so
when linking sotruss-lib.so with:

  libc.so:(*IND*+0x0): multiple definition of `posix_fadvise64@GLIBC_2.2'
  libc.so::(.text+0xcf940): first defined here
  libc.so:(*IND*+0x0): multiple definition of `posix_fadvise64'
  collect2: error: ld returned 1 exit status

Dynamic symbols for libc.so shows (readelf --dyn-syms):

   262: 000000000010b950    28 FUNC    GLOBAL DEFAULT   12 posix_fadvise64@GLIBC_2.2
   417: 000000000010b950    28 FUNC    WEAK   DEFAULT   12 posix_fadvise64@@GLIBC_2.2
  1505: 000000000010b950    28 FUNC    GLOBAL DEFAULT   12 posix_fadvise64@@GLIBC_2.3.3

That is, two separate definitions at version GLIBC_2.2. The issue is
sysdeps/unix/sysv/linux/posix_fadvise64.c creates posix_fadvise64 weak_alias,
while sysdeps/unix/sysv/linux/mips/mips64/n64/posix_fadvise64.c then adds
compat_symbol / versioned_symbol calls.

The patch remove the weak_alias definition on mips64 specific version so
direct weak_alias is disabled.

Checked on mips64n64 build with binutils 2.27.51.20161012.

	* sysdeps/unix/sysv/linux/mips/mips64/n64/posix_fadvise64.c:
	Undefine weak_alias.
2016-10-12 13:21:08 -03:00
H.J. Lu
6a824767d8 X86: Don't assert on older Intel CPUs [BZ #20647]
Since the maximum CPUID level of older Intel CPUs is 1, change
handle_intel to return -1, instead of assert, when the maximum
CPUID level is less than 2.

	[BZ #20647]
	* sysdeps/x86/cacheinfo.c (handle_intel): Return -1 if the
	maximum CPUID level is less than 2.
2016-10-12 08:22:52 -07:00
Joseph Myers
5e9d98a3d9 Add totalorder, totalorderf, totalorderl.
TS 18661-1 defines totalorder functions implementing the totalOrder
comparison operation from IEEE 754-2008.  This patch implements these
functions for glibc, including the type-generic macro in <tgmath.h>.
(The totalordermag functions will be added in a separate patch.)

The description of the totalOrder operation is complicated.  However,
for IEEE interchange binary formats and the preferred quiet NaN
convention, what that complicated description means is that you
interpret the representation as a sign-magnitude integer (with -0
coming before +0) and do a <= comparison on that interpretation.  For
finite values and infinities the ordering of the sign-magnitude
integers is just the same as the ordering of floating-point values, so
this extends that to all representations.  (Different representations
of the same floating-point value - which includes same quantum in the
decimal case - must still be considered equal by this operation, but
that issue doesn't arise for IEEE interchange binary formats.)  So the
complications are:

* When MIPS quiet NaN conventions are in use, the representation of
  NaNs needs adjusting before making such an integer comparison.  This
  patch does this adjustment only when both arguments are NaNs, as
  there's no need for it if only one is a NaN, and as long as both are
  NaNs you can just flip the relevant bits without any problems from
  this turning a NaN into an infinity.

* For the m68k version of ldbl-96, where the high mantissa bit is
  "don't care" for infinities and NaNs, representations where it
  differs must compare the same.  Note: although the testcase for this
  compiles, I have not actually tested on m68k.

* For ldbl-128ibm, the low part must be ignored when the high part is
  NaN, and low parts of +0 and -0 must be considered the same whatever
  the high part.

The new tests in libm-test.inc are the first tests there specifying
particular payloads for input NaNs.  Separate tests are also added for
the ldbl-96 and ldbl-128ibm special cases where there are different
representations of the same value that must compare equal (which can't
be covered in libm-test.inc as that only specifies values, not
representations).

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(totalorder): New declaration.
	* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (totalorder):
	New macro.
	* math/Versions (totalorder): New libm symbol at version
	GLIBC_2.25.
	(totalorderf): Likewise.
	(totalorderl): Likewise.
	* math/Makefile (libm-calls): Add s_totalorderF.
	* math/gen-libm-test.pl (parse_args): Escape quotes in test name
	string.
	* math/libm-test.inc (PAYLOAD_DIG): New macro.
	(qnan_value_pl): Likewise.
	(snan_value_pl): Likewise.
	(qnan_value): Define using qnan_value_pl.
	(snan_value): Define using snan_value_pl.
	(struct test_ff_i_data): Add comment about which tests use this
	structure.
	(RUN_TEST_ff_b): New macro.
	(RUN_TEST_LOOP_ff_b): Likewise.
	(totalorder_test_data): New array.
	(totalorder_test): New function.
	(main): Call totalorder_test.
	* math/test-tgmath.c (NCALLS): Increase to 122.
	(F(compile_test)): Call totalorder.
	(F(totalorder)): New function.
	* manual/arith.texi (FP Comparison Functions): Document
	totalorder, totalorderf and totalorderl.
	* manual/libm-err-tab.pl: Update comment on interfaces without
	ulps tabulated.
	* sysdeps/ieee754/dbl-64/s_totalorder.c: New file.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c: Likewise.
	* sysdeps/ieee754/flt-32/s_totalorderf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_totalorderl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_totalorderl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_totalorderl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-totalorder.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
	totalorder.
	(CFLAGS-nldbl-totalorder.c): New variable.
	* sysdeps/ieee754/ldbl-128ibm/test-totalorderl-ldbl-128ibm.c: New
	file.
	* sysdeps/ieee754/ldbl-128ibm/Makefile [$(subdir) = math] (tests):
	Add test-totalorderl-ldbl-128ibm.
	* sysdeps/ieee754/ldbl-96/test-totalorderl-ldbl-96.c: New file.
	* sysdeps/ieee754/ldbl-96/Makefile [$(subdir) = math] (tests): Add
	test-totalorderl-ldbl-96.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-12 01:20:30 +00:00
Adhemerval Zanella
5da2c626a5 Consolidate Linux sync_file_range implementations
This patch consolidates all the sync_file_range implementation for Linux
in only one (sysdeps/unix/sysv/linux/sync_file_range.c).  It also removes
the syscall from the auto-generation using assembly macros (except for
x86_64 due x32 [1]).

For current minimum supported kernel (2.6.32 for x86_64 and 3.2 for all
other architectures) either sync_file_range or sync_file_range2 is supported
and it is expected that any future Linux ABI will provide either of one
syscall.  So the code path that returns ENOSYS in the case of missing
syscall is removed.

Checked on x86_64, i386, powerpc64le, aarch64, and armhf.

	* sysdeps/unix/sysv/linux/Makefile (tests): Add tst-sync_file_range.
	* sysdeps/unix/sysv/linux/mips/mips32/sync_file_range.c: Remove file.
	* sysdeps/sysv/linux/powerpc/powerpc64/sync_file_range.c: Likewise.
	* sysdeps/unix/sysv/linux/sync_file_range.c: New file.
	* sysdeps/unix/sysv/linux/tst-sync_file_range.c (sync_file_range):
	Consolidate all Linux implementations.

[1] https://patchwork.ozlabs.org/patch/659794/
2016-10-11 16:21:12 -03:00
Alan Modra
3f413ec8d1 powerpc32: make PLT call in _mcount compatible with -msecure-plt (bug 20554) 2016-10-09 21:43:50 +02:00
Adhemerval Zanella
96b7fe4243 Consolidate posix_fadvise implementations
This patch consolidates mostly of the Linux posix_fadvise{64} implementations
on sysdeps/unix/sysv/linux/posix_fadvise{64}.c.  It still keeps arch-specific
files for:

  * S390-32: it uses a packed structure to pass all the arguments on syscall.
    It is the only supported port that implements __NR_fadvise64_64 in this
    way.

  * ARM: it does not implement __NR_fadvise64 (as other 32-bits ports), so
    posix_fadvise calls internal posix_fadvise64 symbol.

  * MIPS64 n64: it requires a different version number that other ports.

The new macro SYSCALL_LL{64} is used to handle the offset argument and
INTERNAL_SYSCALL_CALL to handle passing the correct number of expect
arguments.

The default Linux adds two new defines a port can use to control how
__NR_fadvise64_64 passes the kernel arguments:

  * __ASSUME_FADVISE64_64_6ARG: the 'advise' argument is moved on second
    position.  This is the case of powerpc32 and arm to avoid implement
    7 argument syscall.

  * __ASSUME_FADVISE64_64_NO_ALIGN: for ABIs that defines
    __ASSUME_ALIGNED_REGISTER_PAIRS packs the offset without the leading
    '0'.  This is the case of tile 32 bits.

ARM also defines __NR_fadvise64_64 as __NR_arm_fadvise64_64 (which is also
handled on arch kernel-feature.h).

Tested on x86_64, x32, i686, armhf, and aarch64.

	* posix/Makefile (tests): Add tst-posix_fadvise and tst-posix_fadvise64.
	* posix/tst-posix_fadvise.c: New file.
	* posix/tst-posix_fadvise64.c: Likewise.
	* posix/tst-posix_fadvise-common.c: Likewise.
	* sysdeps/unix/sysv/linux/arm/kernel-features.h
	(__ASSUME_FADVISE64_64_6ARG): Define.
	* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
	[!__powerpc64__] (__ASSUME_FADVISE64_64_6ARG): Add define.
	* sysdeps/unix/sysv/linux/arm/posix_fadvise64.c: Remove file.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/posix_fadvise.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/posix_fadvise64.S: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/posix_fadvise.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/posix_fadvise64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/posix_fadvise.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/posix_fadvise64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/posix_fadvise.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/posix_fadvise.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/posix_fadvise64.c:
	Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/posix_fadvise.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/posix_fadvise64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/posix_fadvise64.c
	(SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3) [__posix_fadvise64_l64]:
	Alias to __posix_fadvise64_l32.
	(SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3) [__posix_fadvise64_l32]:
	Add compat definition to posix_fadvise64.
	(SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3) [__posix_fadvise64_l64]:
	Add versioned definition to posix_fadvise64.
	* sysdeps/unix/sysv/linux/posix_fadvise.c (posix_fadvise): Build iff
	__OFF_T_MATCHES_OFF64_T is defined, use INTERNAL_SYSCALL_CALL, add
	__ASSUME_FADVISE64_64_6ARG/__ASSUME_FADVISE64_64_NO_ALIGN support.
	* sysdeps/unix/sysv/linux/posix_fadvise64.c (posix_fadvise64): Add
	__ASSUME_FADVISE64_64_NO_ALIGN support and use INTERNAL_SYSCALL_CALL.
2016-10-07 14:16:41 -03:00
Adhemerval Zanella
45ff2bfcb3 Consolidate posix_fallocate{64} implementations
This patch consolidates all the posix_fallocate{64} implementation for Linux
in only one (sysdeps/unix/sysv/linux/posix_fallocate{64}.c).  It also removes
the syscall from the auto-generation using assembly macros.

The macro SYSCALL_LL{64} is used to handle the offset argument along with
the new INTERNAL_SYSCALL_CALL macro to define correct argument count for
internal INTERNAL_SYSCALL call.

Tested on x86_64, i686, x32, aarch64, ppc64le, and armhf.

	* io/Makefile (tests): Add tst-posix_fallocate and
	tst-posix_fallocate64.
	* io/tst-posix_fallocate-common.c: New file.
	* io/tst-posix_fallocate.c: Likewise.
	* io/tst-posix_fallocate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/posix_fallocate.c: Remove
	file.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/posix_fallocate64.c:
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/posix_fallocate.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/posix_fallocate64.c:
	Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/posix_fallocate.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/posix_fallocate64.c: Likewise.
	* sysdeps/unix/sysv/linux/posix_fallocate.c (posix_fallocate): Use
	SYSCALL_LL to pass both offset and len arguments.
	* sysdeps/unix/sysv/linux/posix_fallocate64.c (posix_fallocate64):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (pwrite64): Add
	__libc_pwrite64 alias used by posix_fallocate64.
2016-10-07 14:16:41 -03:00
Adhemerval Zanella
6c63e2d8df Consolidate fallocate{64} implementations
This patch consolidates all the fallocate{64} implementation for Linux
in only one (sysdeps/unix/sysv/linux/fallocate{64}.c).  It also removes the
syscall from the auto-generation using assembly macros.

The new macro SYSCALL_LL{64} is used to handle the offset argument.

Checked on x86_64, x32, i386, aarch64, and ppc64le.

	* sysdeps/unix/sysv/linux/Makefile (test): Add tst-fallocate and
	tst-fallocate64.
	* sysdeps/unix/sysv/linux/tst-fallocate.c: New file.
	* sysdeps/unix/sysv/linux/tst-fallocate64.c: Likewise.
	* sysdeps/unix/sysv/linux/tst-fallocate-common.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate.c: Remove file.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/fallocate.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/fallocate64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/fallocate.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/fallocate64.c: Likewise.
	* sysdeps/unix/sysv/linux/fallocate.c (fallocate): Use SYSCALL_LL
	macro on offset argument.
	* sysdeps/unix/sysv/linux/fallocate64.c (fallocate64): Use
	SYSCALL_LL64 on offset argument.
	* test-skeleton.c (FAIL_RET): Add macro.
	(FAIL_EXIT): Likewise.
	(FAIL_EXIT1): Likewise.
	(_FAIL): Likewise.
2016-10-07 14:16:36 -03:00
Stefan Liebler
314ba75e4a Use libc_ifunc macro for siglongjmp, longjmp in libpthread.
This patch uses the libc_ifunc macro to create already existing ifunc functions
longjmp_ifunc, siglongjmp_ifunc if HAVE_IFUNC is defined.
The s390 pt-longjmp.c includes the common pt-longjmp.c and uses strong_alias
to create the longjmp, siglongjmp symbols for glibc version 2.19.

ChangeLog:

	* nptl/pt-longjmp.c (DEFINE_LONGJMP): Use libc_ifunc macro.
	* sysdeps/unix/sysv/linux/s390/pt-longjmp.c (longjmp, siglongjmp):
	Use strong_alias to create symbols for glibc verison 2.19.
2016-10-07 10:12:48 +02:00
Stefan Liebler
a4d7fe35cd ppc: Use libc_ifunc macro for time, gettimeofday.
This patch uses the libc_ifunc_hidden macro to create already existing ifunc functions
time and gettimeofday on power. This way, the libc_hidden_def macro can be used
instead of inline assemblies.
On ppc32, the __GI_* symbols do not target the ifunc symbol and thus the
redirection construct has to be applied here.

ChangeLog:

	* sysdeps/unix/sysv/linux/powerpc/gettimeofday.c (__gettimeofday):
	Use libc_ifunc_hidden and libc_hidden_def macro. Redirect ifunced function
	in header for using it as type for ifunc function because __GI_* symbols
	for ppc32 do not target the ifunc symbols.
	* sysdeps/unix/sysv/linux/powerpc/time.c (time): Likewise.
2016-10-07 10:12:46 +02:00
Stefan Liebler
e23faea6ae i386, x86: Use libc_ifunc macro for time, gettimeofday.
This patch uses the libc_ifunc_hidden macro to create already existing ifunc functions
time and gettimeofday on intel. This way, the libc_hidden_def macro can be used
instead of the libc_ifunc_hidden_def one which was only used here. Thus the
macro is removed from libc-symbols.h.
On i386, the __GI_* symbols do not target the ifunc symbol and thus the
redirection construct has to be applied here.

ChangeLog:

	* sysdeps/unix/sysv/linux/x86/gettimeofday.c (__gettimeofday):
	Use libc_ifunc_hidden macro. Use libc_hidden_def instead of
	libc_ifunc_hidden_def.
	* sysdeps/unix/sysv/linux/x86/time.c (time): Likewise.
	* sysdeps/unix/sysv/linux/i386/gettimeofday.c (__gettimeofday):
	Redirect ifunced function in header for using it as type of ifunc'ed
	function. Redefine libc_hidden_def to use fallback non ifunc'ed
	function for __GI_* symbol.
	* sysdeps/unix/sysv/linux/i386/time.c (time): Likewise.
	* include/libc-symbols.h
	(libc_ifunc_hidden_def, libc_ifunc_hidden_def1): Delete macro.
2016-10-07 10:12:42 +02:00
Stefan Liebler
18d6c45e12 s390: Refactor ifunc resolvers due to false debuginfo.
This patch adjusts the s390 specific ifunc helper macros in ifunc-resolve.h to
use the common __ifunc macro, which uses gcc attribute ifunc to get rid of the
false debuginfo. Therefore the redirection construct is applied where needed.

Perhaps in future we can switch some of the internal symbols __GI_* from the
fallback variant to the ifunc function. But this change is not
straightforward due to a segmentation fault while linking libc.so with older
binutils on s390.

ChangeLog:

	[BZ #20478]
	* sysdeps/s390/multiarch/ifunc-resolve.h
	(s390_vx_libc_ifunc2, s390_libc_ifunc): Use __ifunc from libc-symbols.h
	to create ifunc symbols.
	(s390_vx_libc_ifunc_init, s390_vx_libc_ifunc_redirected
	, s390_vx_libc_ifunc2_redirected, s390_libc_ifunc_init): New define.
	* sysdeps/s390/multiarch/memchr.c: Redirect ifunced function in header
	for using it as type for ifunc function.
	* sysdeps/s390/multiarch/mempcpy.c: Likewise.
	* sysdeps/s390/multiarch/rawmemchr.c: Likewise.
	* sysdeps/s390/multiarch/stpcpy.c: Likewise.
	* sysdeps/s390/multiarch/stpncpy.c: Likewise.
	* sysdeps/s390/multiarch/strcat.c: Likewise.
	* sysdeps/s390/multiarch/strchr.c: Likewise.
	* sysdeps/s390/multiarch/strcmp.c: Likewise.
	* sysdeps/s390/multiarch/strcpy.c: Likewise.
	* sysdeps/s390/multiarch/strcspn.c: Likewise.
	* sysdeps/s390/multiarch/strlen.c: Likewise.
	* sysdeps/s390/multiarch/strncmp.c: Likewise.
	* sysdeps/s390/multiarch/strncpy.c: Likewise.
	* sysdeps/s390/multiarch/strnlen.c: Likewise.
	* sysdeps/s390/multiarch/strpbrk.c: Likewise.
	* sysdeps/s390/multiarch/strrchr.c: Likewise.
	* sysdeps/s390/multiarch/strspn.c: Likewise.
	* sysdeps/s390/multiarch/wcschr.c: Likewise.
	* sysdeps/s390/multiarch/wcscmp.c: Likewise.
	* sysdeps/s390/multiarch/wcspbrk.c: Likewise.
	* sysdeps/s390/multiarch/wcsspn.c: Likewise.
	* sysdeps/s390/multiarch/wmemchr.c: Likewise.
	* sysdeps/s390/multiarch/wmemset.c: Likewise.
	* sysdeps/s390/s390-32/multiarch/memcmp.c: Likewise.
	* sysdeps/s390/s390-32/multiarch/memcpy.c: Likewise.
	* sysdeps/s390/s390-32/multiarch/memset.c: Likewise.
	* sysdeps/s390/s390-64/multiarch/memcmp.c: Likewise.
	* sysdeps/s390/s390-64/multiarch/memcpy.c: Likewise.
	* sysdeps/s390/s390-64/multiarch/memset.c: Likewise.
2016-10-07 10:11:21 +02:00
Stefan Liebler
00980d845f Use gcc attribute ifunc in libc_ifunc macro instead of inline assembly due to false debuginfo.
The current s390 ifunc resolver for vector optimized functions and the common
libc_ifunc macro in include/libc-symbols.h uses something like that to generate ifunc'ed functions:
extern void *__resolve___strlen(unsigned long int dl_hwcap) asm (strlen);
asm (".type strlen, %gnu_indirect_function");

This leads to false debug information:
objdump --dwarf=info libc.so:
...
<1><1e6424>: Abbrev Number: 43 (DW_TAG_subprogram)
    <1e6425>   DW_AT_external    : 1
    <1e6425>   DW_AT_name        : (indirect string, offset: 0x1146e): __resolve___strlen
    <1e6429>   DW_AT_decl_file   : 1
    <1e642a>   DW_AT_decl_line   : 23
    <1e642b>   DW_AT_linkage_name: (indirect string, offset: 0x1147a): strlen
    <1e642f>   DW_AT_prototyped  : 1
    <1e642f>   DW_AT_type        : <0x1e4ccd>
    <1e6433>   DW_AT_low_pc      : 0x998e0
    <1e643b>   DW_AT_high_pc     : 0x16
    <1e6443>   DW_AT_frame_base  : 1 byte block: 9c     (DW_OP_call_frame_cfa)
    <1e6445>   DW_AT_GNU_all_call_sites: 1
    <1e6445>   DW_AT_sibling     : <0x1e6459>
 <2><1e6449>: Abbrev Number: 44 (DW_TAG_formal_parameter)
    <1e644a>   DW_AT_name        : (indirect string, offset: 0x1845): dl_hwcap
    <1e644e>   DW_AT_decl_file   : 1
    <1e644f>   DW_AT_decl_line   : 23
    <1e6450>   DW_AT_type        : <0x1e4c8d>
    <1e6454>   DW_AT_location    : 0x122115 (location list)
...

The debuginfo for the ifunc-resolver function contains the DW_AT_linkage_name
field, which names the real function name "strlen". If you perform an inferior
function call to strlen in lldb, then it fails due to something like that:
"error: no matching function for call to 'strlen'
candidate function not viable: no known conversion from 'const char [6]'
to 'unsigned long' for 1st argument"

The unsigned long is the dl_hwcap argument of the resolver function.
The strlen function itself has no debufinfo.

The s390 ifunc resolver for memset & co uses something like that:
asm (".globl FUNC"
     ".type FUNC, @gnu_indirect_function"
     ".set FUNC, __resolve_FUNC");

This way the debuginfo for the ifunc-resolver function does not conain the
DW_AT_linkage_name field and the real function has no debuginfo, too.

Using this strategy for the vector optimized functions leads to some troubles
for functions like strnlen. Here we have __strnlen and a weak alias strnlen.
The __strnlen function is the ifunc function, which is realized with the asm-
statement above. The weak_alias-macro can't be used here due to undefined symbol:
gcc ../sysdeps/s390/multiarch/strnlen.c -c ...
In file included from <command-line>:0:0:
../sysdeps/s390/multiarch/strnlen.c:28:24: error: ‘strnlen’ aliased to undefined symbol ‘__strnlen’
 weak_alias (__strnlen, strnlen)
                        ^
./../include/libc-symbols.h:111:26: note: in definition of macro ‘_weak_alias’
   extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));
                          ^
../sysdeps/s390/multiarch/strnlen.c:28:1: note: in expansion of macro ‘weak_alias’
 weak_alias (__strnlen, strnlen)
 ^
make[2]: *** [build/string/strnlen.o] Error 1

As the __strnlen function is defined with asm-statements the function name
__strnlen isn't known by gcc. But the weak alias can also be done with an
asm statement to resolve this issue:
__asm__ (".weak  strnlen\n\t"
         ".set   strnlen,__strnlen\n");

In order to use the weak_alias macro, gcc needs to know the ifunc function. The
minimum gcc to build glibc is currently 4.7, which supports attribute((ifunc)).
See https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Function-Attributes.html.
It is only supported if gcc is configured with --enable-gnu-indirect-function
or gcc supports it by default for at least intel and s390x architecture.
This patch uses the old behaviour if gcc support is not available.
Usage of attribute ifunc is something like that:
__typeof (FUNC) FUNC __attribute__ ((ifunc ("__resolve_FUNC")));

Then gcc produces the same .globl, .type, .set assembler instructions like above.
And the debuginfo does not contain the DW_AT_linkage_name field and there is no
debuginfo for the real function, too.

But in order to get it work, there is also some extra work to do.
Currently, the glibc internal symbol on s390x e.g. __GI___strnlen is not the
ifunc symbol, but the fallback __strnlen_c symbol. Thus I have to omit the
libc_hidden_def macro in strnlen.c (here is the ifunc function __strnlen)
because it is already handled in strnlen-c.c (here is __strnlen_c).

Due to libc_hidden_proto (__strnlen) in string.h, compiling fails:
gcc ../sysdeps/s390/multiarch/strnlen.c -c ...
In file included from <command-line>:0:0:
../sysdeps/s390/multiarch/strnlen.c:53:24: error: ‘strnlen’ aliased to undefined symbol ‘__strnlen’
 weak_alias (__strnlen, strnlen)
                        ^
./../include/libc-symbols.h:111:26: note: in definition of macro ‘_weak_alias’
   extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));
                          ^
../sysdeps/s390/multiarch/strnlen.c:53:1: note: in expansion of macro ‘weak_alias’
 weak_alias (__strnlen, strnlen)
 ^
make[2]: *** [build/string/strnlen.os] Error 1

I have to redirect the prototypes for __strnlen in string.h and create a copy
of the prototype for using as ifunc function:
__typeof (__redirect___strnlen) __strnlen __attribute__ ((ifunc ("__resolve_strnlen")));
weak_alias (__strnlen, strnlen)

This way there is no trouble with the internal __GI_* symbols.
Glibc builds fine with this construct and the debuginfo is "correct".
For functions without a __GI_* symbol like memccpy this redirection is not needed.

This patch adjusts the common libc_ifunc and libm_ifunc macro to use gcc
attribute ifunc. Due to this change, the macro users where the __GI_* symbol
does not target the ifunc symbol have to be prepared with the redirection
construct.
Furthermore a configure check to test gcc support is added. If it is not supported,
the old behaviour is used.

This patch also prepares the libc_ifunc macro to be useable in s390-ifunc-macro.
The s390 ifunc-resolver-functions do have an hwcaps parameter and not all
resolvers need the same initialization code. The next patch in this series
changes the s390 ifunc macros to use this common one.

ChangeLog:

	* include/libc-symbols.h (__ifunc_resolver):
	New macro is used by __ifunc* macros.
	(__ifunc): New macro uses gcc attribute ifunc or inline assembly
	depending on HAVE_GCC_IFUNC.
	(libc_ifunc, libm_ifunc): Use __ifunc as base macro.
	(libc_ifunc_redirected, libc_ifunc_hidden, libm_ifunc_init): New macro.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_finite.c:
	Redirect ifunced function in header for using as type for ifunc function.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_finitef.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_isinf.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_isinff.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_isnan.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/memcpy.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/memmove.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/memset.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/rawmemchr.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/strchr.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/strlen.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/strncmp.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/strnlen.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_finite.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_finitef.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinff.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isnan.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/memcmp.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/mempcpy.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/stpncpy.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strcat.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strchr.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strcmp.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strcpy.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strncmp.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strncpy.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strnlen.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strrchr.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strstr.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/wcschr.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_isnanf.c:
	Add libc_hidden_def() and use libc_ifunc_hidden() macro
	instead of libc_ifunc() macro.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isnanf.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/stpcpy.c: Likewise.
2016-10-07 10:03:20 +02:00
Joseph Myers
1e7c8fcca5 Add iseqsig.
TS 18661-1 adds an iseqsig type-generic comparison macro to <math.h>.
This macro is like the == operator except that unordered operands
result in the "invalid" exception and errno being set to EDOM.

This patch implements this macro for glibc.  Given the need to set
errno, this is implemented with out-of-line functions __iseqsigf,
__iseqsig and __iseqsigl (of which the last only exists at all if long
double is ABI-distinct from double, so no function aliases or compat
support are needed).  The present patch ignores excess precision
issues; I intend to deal with those in a followup patch.  (Like
comparison operators, type-generic comparison macros should *not*
convert operands to their semantic types but should preserve excess
range and precision, meaning that for some argument types and values
of FLT_EVAL_METHOD, an underlying function should be called for a
wider type than that of the arguments.)

The underlying functions are implemented with the type-generic
template machinery.  Comparing x <= y && x >= y is sufficient in ISO C
to achieve an equality comparison with "invalid" raised for unordered
operands (and the results of those two comparisons can also be used to
tell whether errno needs to be set).  However, some architectures have
GCC bugs meaning that unordered comparison instructions are used
instead of ordered ones.  Thus, a mechanism is provided for
architectures to use an explicit call to feraiseexcept to raise
exceptions if required.  If your architecture has such a bug you
should add a fix-fp-int-compare-invalid.h header for it, with a
comment pointing to the relevant GCC bug report; if such a GCC bug is
fixed, that header's contents should have a __GNUC_PREREQ conditional
added so that the workaround can eventually be removed for that
architecture.

Tested for x86_64, x86, mips64, arm and powerpc.

	* math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (iseqsig): New
	macro.
	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(__iseqsig): New declaration.
	* math/s_iseqsig_template.c: New file.
	* math/Versions (__iseqsigf): New libm symbol at version
	GLIBC_2.25.
	(__iseqsig): Likewise.
	(__iseqsigl): Likewise.
	* math/libm-test.inc (iseqsig_test_data): New array.
	(iseqsig_test): New function.
	(main): Call iseqsig_test.
	* math/Makefile (gen-libm-calls): Add s_iseqsigF.
	* manual/arith.texi (FP Comparison Functions): Document iseqsig.
	* manual/libm-err-tab.pl: Update comment on interfaces without
	ulps tabulated.
	* sysdeps/generic/fix-fp-int-compare-invalid.h: New file.
	* sysdeps/powerpc/fpu/fix-fp-int-compare-invalid.h: Likewise.
	* sysdeps/x86/fpu/fix-fp-int-compare-invalid.h: Likewise.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-06 22:19:38 +00:00
Siddhesh Poyarekar
36ee03e6a8 Update comments for some functions in s_sin.c
Update comments for some functions to bring them in sync with what the
functions are actually doing.
2016-10-06 13:09:02 +05:30
Siddhesh Poyarekar
9cb069308c Adjust calls to do_sincos_1 and do_sincos_2 in s_sincos.c
Adjust calls to do_sincos_1 and do_sincos_2 to pass a boolean
shift_quadrant instead of the numeric 0 and 1.

This does not affect codegen.
2016-10-06 12:57:07 +05:30
Siddhesh Poyarekar
ead1ef37d2 Make quadrant shift a boolean in reduce_and_compute in s_sin.c
Like the previous change, make the quadrant shift a boolean to make it
clearer that we will do at most a single rotation of the quadrants to
compute the cosine from the sine function.

This does not affect codegen.
2016-10-06 12:54:04 +05:30
Siddhesh Poyarekar
ba4e688461 Check n instead of k1 to decide on sign of sin/cos result
For k1 in 1 and 3, n can only have values of 0 and 2, so checking k1 &
2 is equivalent to checking n & 2.  We prefer the latter so that we
don't use k1 for anything other than selecting the quadrant in
do_sincos_1, thus dropping it completely.

The previous logic was:

    "Compute sine for the value and based on the new rotated quadrant
     (k1) negate the value if we're in the fourth quadrant."

With this change, the logic now is:

    "Compute sine for the value and negate it if we were either (1) in
     the fourth quadrant or (2) we actually wanted the cosine and were
     in the third quadrant."

	* sysdeps/ieee754/dbl-64/s_sin.c (do_sincos_1): Check N
	instead of K1.
2016-10-06 00:34:26 +05:30
Siddhesh Poyarekar
b8b7e5e644 Make the quadrant shift K a bool in do_sincos_* functions
The do_sincos_* functions are helpers to compute sin/cos, where they
get cosine by computing sine for the next quadrant.  This is decided
with the value of K passed to it, which is the amount by which to
shift the quadrant.  Since we will only need the shift to be 0 or 1,
we make K a bool to make that explicit.

	* sysdeps/ieee754/dbl-64/s_sin.c (do_sincos_1): Rename K to
	SHIFT_QUADRANT and make it bool.
	(do_sincos_2): Likewise.
	(sloww): Likewise.
	(sloww1): Likewise.
	(__sin): Adjust calls to do_sincos_1 and do_sincos_2.
	(__cos): Likewise.
2016-10-06 00:33:54 +05:30
Tulio Magno Quites Machado Filho
8028566ed9 powerpc: Regenerate ULPs
* sysdeps/powerpc/fpu/libm-test-ulps: Regenerated.
2016-10-05 08:57:47 -03:00
Tulio Magno Quites Machado Filho
22938c4103 powerpc: Installed-header hygiene
Fix powerpc-specific headers:
 - Make it compatible to C89 by replace references to inline by __inline__.
 - Get the definition of sigset_t used by
   sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h.
 - Includes missing header file.
2016-10-04 10:54:40 -03:00
Stefan Liebler
7125ad021d S390: Regenerate ULPs
Regenerated ulps file after recent commit "Use __builtin_fma more in dbl-64 code.".

ChangeLog:

    * sysdeps/s390/fpu/libm-test-ulps: Regenerated.
2016-10-04 15:27:40 +02:00
Joseph Myers
dad9a11a93 Add TCP_REPAIR_WINDOW from Linux 4.8.
Linux 4.8 adds TCP_REPAIR_WINDOW to include/uapi/linux/tcp.h.  This
patch adds it to sysdeps/gnu/netinet/tcp.h accordingly, along with
struct tcp_repair_window as requested in
<https://sourceware.org/ml/libc-alpha/2016-10/msg00019.html>.

Tested for x86_64 and x86 (testsuite, and that installed shared
libraries are unchanged by the patch).

	* sysdeps/gnu/netinet/tcp.h (TCP_REPAIR_WINDOW): New macro.
	(struct tcp_repair_window): New type.
2016-10-03 21:01:42 +00:00
Joseph Myers
f280fa6d17 Use __builtin_fma more in dbl-64 code.
sysdeps/ieee754/dbl-64/dla.h can use a macro DLA_FMS for more
efficient double-width operations when fused multiply-subtract is
supported.  However, this macro is only defined for x86_64,
conditional on architecture-specific __FMA4__.  This patch makes the
code use __builtin_fma conditional on __FP_FAST_FMA, as used elsewhere
in glibc.

Tested for x86_64, x86 and powerpc.  On powerpc (where this is causing
fused operations to be used where they weren't previously) I see an
increase from 1ulp to 2ulp in the imaginary part of clog10:

testing double (without inline functions)
Failure: Test: Imaginary part of: clog10 (0x1.7a858p+0 - 0x6.d940dp-4 i)
Result:
 is:         -1.2237865208199886e-01  -0x1.f5435146bb61ap-4
 should be:  -1.2237865208199888e-01  -0x1.f5435146bb61cp-4
 difference:  2.7755575615628914e-17   0x1.0000000000000p-55
 ulp       :  2.0000
 max.ulp   :  1.0000
Maximal error of real part of: clog10
 is      : 3 ulp
 accepted: 3 ulp
Maximal error of imaginary part of: clog10
 is      : 2 ulp
 accepted: 1 ulp

This is actually resulting from atan2 becoming *more* accurate (atan2
(-0x6.d940dp-4, 0x1.7a858p+0) should ideally be -0x1.208cd6e841554p-2
but was -0x1.208cd6e841555p-2 from a powerpc libm built before this
change, and is -0x1.208cd6e841554p-2 from a powerpc libm built after
this change).  Since these functions are not expected to be correctly
rounding by glibc's accuracy goals, neither result is a problem, but
this does imply that some of this code, although designed to be
correctly rounding, is not in fact correctly rounding (possibly
because of GCC creating fused operations where the code does not
expect it, something we've only disabled for specific functions where
it was found to cause large errors).  (Of course as previously
discussed I think we should remove the slow cases where an error
analysis shows this wouldn't increase the errors much above 0.5ulp;
it's only functions such as cratan2 that are expected to be correctly
rounding, not atan2.)

	* sysdeps/ieee754/dbl-64/dla.h [__FP_FAST_FMA] (DLA_FMS): Define
	macro to use __builtin_fma.
	* sysdeps/x86_64/fpu/dla.h: Remove file.
2016-09-30 15:49:51 +00:00
Joseph Myers
8278d50ce7 Fix ldbl-128ibm iscanonical for -mlong-double-64.
This patch fixes the ldbl-128ibm version of the iscanonical macro not
to use __iscanonicall when long double = double (-mlong-double-64).

Tested for powerpc.

	* sysdeps/ieee754/ldbl-128ibm/bits/iscanonical.h
	[__NO_LONG_DOUBLE_MATH] (__iscanonicall): Do not declare.
	[__NO_LONG_DOUBLE_MATH] (iscanonical): Define to evaluate to 1.
2016-09-30 15:08:08 +00:00
Joseph Myers
29cb929332 Add iscanonical.
TS 18661-1 adds an iscanonical classification macro to <math.h>.

The motivation for this is decimal floating-point, where some values
have both canonical and noncanonical encodings.  For IEEE binary
interchange formats, all encodings are canonical.  For x86/m68k
ldbl-96, and for ldbl-128ibm, there are encodings that do not
represent any valid value of the type; although formally iscanonical
does not need to handle trap representations (and so could just always
return 1), it seems useful, and in line with the description in the TS
of "representations that are extraneous to the floating-point model"
as being non-canonical (as well as "redundant representations of some
or all of its values"), for it to detect those representations and
return 0 for them.

This patch adds iscanonical to glibc.  It goes in a header
<bits/iscanonical.h>, included under appropriate conditions in
<math.h>.  The default header version just evaluates the argument
(converted to its semantic type, though current GCC will probably
discard that conversion and any exceptions resulting from it) and
returns 1.  ldbl-96 and ldbl-128ibm then have versions of the header
that call a function __iscanonicall for long double (the sizeof-based
tests will of course need updating for float128 support, like other
such type-generic macro implementations).  The ldbl-96 version of
__iscanonicall has appropriate conditionals to reflect the differences
in the m68k version of that format (where the high mantissa bit may be
either 0 or 1 when the exponent is 0 or 0x7fff).  Corresponding tests
for those formats are added as well.  Other architectures do not have
any new functions added because just returning 1 is correct for all
their floating-point formats.

Tested for x86_64, x86, mips64 (to test the default macro version) and
powerpc.

	* math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Include
	<bits/iscanonical.h>.
	* bits/iscanonical.h: New file.
	* math/s_iscanonicall.c: Likewise.
	* math/Versions (__iscanonicall): New libm symbol at version
	GLIBC_2.25.
	* math/libm-test.inc (iscanonical_test_data): New array.
	(iscanonical_test): New function.
	(main): Call iscanonical_test.
	* math/Makefile (headers): Add bits/iscanonical.h.
	(type-ldouble-routines): Add s_iscanonicall.
	* manual/arith.texi (Floating Point Classes): Document
	iscanonical.
	* manual/libm-err-tab.pl: Update comment on interfaces without
	ulps tabulated.
	* sysdeps/ieee754/ldbl-128ibm/bits/iscanonical.h: New file.
	* sysdeps/ieee754/ldbl-128ibm/s_iscanonicall.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/test-iscanonical-ldbl-128ibm.c:
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/Makefile (tests): Add
	test-iscanonical-ldbl-128ibm.
	* sysdeps/ieee754/ldbl-96/bits/iscanonical.h: New file.
	* sysdeps/ieee754/ldbl-96/s_iscanonicall.c: Likewise.
	* sysdeps/ieee754/ldbl-96/test-iscanonical-ldbl-96.c: Likewise.
	* sysdeps/ieee754/ldbl-96/Makefile: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-09-30 00:27:50 +00:00
Siddhesh Poyarekar
2bf499708d Use copysign instead of ternary for some sin/cos input ranges
These are remaining cases where we can deduce and conclude that the
sign of the result should be the same as the sign of the input being
checked.  For example, for sin(x), the sign of the result is the same
as the result itself for x < pi.  Likewise, for sine values where x
after range reduction falls into this range and its sign is preserved.

	* sysdeps/ieee754/dbl-64/s_sin.c (do_sincos_1): Use copysign
	instead of ternary condition.
	(do_sincos_2): Likewise.
	(__sin): Likewise.
	(__cos): Likewise.
	(slow): Likewise.
	(sloww): Likewise.
	(sloww1): Likewise.
	(bsloww): Likewise.
	(bsloww1): Likewise.
2016-09-30 05:19:05 +05:30
Siddhesh Poyarekar
3459931a1a Use copysign instead of ternary conditions for positive constants
This is the first very simple substitution of ternary conditions for
correction adjustments with __copysign for positive constants.

	* sysdeps/ieee754/dbl-64/s_sin.c (do_cos_slow): use copysign
	instead of ternary condition.
	(do_sin_slow): Likewise.
	(do_sincos_1): Likewise.
	(do_sincos_2): Likewise.
	(__cos): Likewise.
	(sloww): Likewise.
	(sloww1): Likewise.
	(sloww2): Likewise.
	(bsloww): Likewise.
	(bsloww1): Likewise.
	(bsloww2): Likewise.
2016-09-30 05:17:55 +05:30
Siddhesh Poyarekar
a87b5e95ad consolidate sign checks for slow2
Simplify the code a bit by consolidating sign checks in slow1 and
slow2 into __sin at the higher level.

	* sysdeps/ieee754/dbl-64/s_sin.c (slow1): Consolidate sign
	check from here...
	(slow2): ... and here...
	(__sin): ... to here.
2016-09-30 05:15:56 +05:30
Adhemerval Zanella
e83be73091 posix: Fix open file action for posix_spawn on Linux
On posix_spawn open file action (issued by posix_spawn_file_actions_addopen)
POSIX states that if fildes was already an open file descriptor, it shall be
closed before the new file is openedi [1].  This avoid pontential issues when
posix_spawn plus addopen action is called with the process already at maximum
number of file descriptor opened and also for multiple actions on single-open
special paths (like /dev/watchdog).

This fixes its behavior on Linux posix_spawn implementation and also adds
a tests to check for its behavior.

Checked on x86_64.

	* posix/Makefile (tests): Add tst-spawn3.
	* posix/tst-spawn3.c: New file.
	* sysdeps/unix/sysv/linux/spawni.c (__spawni_child): Close file descriptor
	if it is already opened for open action.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_spawn_file_actions_addclose.html
2016-09-28 14:07:35 -07:00
Rasmus Villemoes
4b4d4056bb linux: spawni.c: simplify error reporting to parent
Using CLONE_VFORK already ensures that the parent does not run until the
child has either exec'ed succesfully or called _exit. Hence we don't
need to read from a CLOEXEC pipe to ensure proper synchronization - we
just make explicit use of the fact the the child and parent run in the
same VM, so the child can write an error code to a field of the
posix_spawn_args struct instead of sending it through a pipe.

To ensure that this mechanism really works, the parent initializes the
field to -1 and the child writes 0 before execing.

This eliminates some annoying bookkeeping that is necessary to avoid
the file actions from clobbering the write end of the pipe, and
getting rid of the pipe creation in the first place means fewer system
calls (four in the parent, usually one in the child) and fewer
chanches for the spawn to fail (e.g. if we're close to EMFILE).

Checked on x86_64 and i686.

	* sysdeps/unix/sysv/linux/spawni.c (posix_spawn_args): Remove pipe
	field, add err field.
	(__spawni_child): Report error through err member instead of pipe.
	(__spawnix): Likewise.
2016-09-28 11:16:21 -07:00
Zack Weinberg
32daf20b54 Minor correction to the "installed header hygiene" patches.
* sysdeps/unix/sysv/linux/s390/sys/ucontext.h: Restore accidentally-
	deleted typedef ucontext_t.
2016-09-28 07:19:59 -04:00
Adhemerval Zanella
e33a23fbe8 Add INTERNAL_SYSCALL_CALL
This patch adds two new macros for internal and inline syscall to use
within GLIBC: INTERNAL_SYSCALL_CALL and INLINE_SYSCALL_CALL.  They are
similar to the old INTERNAL_SYSCALL and INLINE_SYSCALL with the difference
the new macros accept a variable argument call and do not require to pass
the expected argument size.

The advantage is it is possible to use variable argument macros like
SYSCALL_LL{64} without the need to also handle the argument size.  So
for an ABI where SYSCALL_LL might split the argument in high and low
parts, instead of:

  INTERNAL_SYSCALL_DECL (err);
 #if ...
  INTERNAL_SYSCALL (syscall, err, 2, SYSCALL_LL (len));
 #else
  INTERNAL_SYSCALL (syscall, err, 1, SYSCALL_LL (len));
 #endif

It will be just:

  INTERNAL_SYSCALL_CALL (syscall, err, SYSCALL_LL (len));

The INLINE_SYSCALL_CALL follows the same semanthic regarding the argument
and is similar to INLINE_SYSCALL regarding setting errno.

Checked with a build for x86_64, i386, aach64, armhf, powerpc64le, powerpc32,
and mips32.  No code generation changed.

	* sysdeps/unix/sysdep.h (__INTERNAL_SYSCALL0): New macro.
	(__INTERNAL_SYSCALL1): Likewise.
	(__INTERNAL_SYSCALL2): Likewise.
	(__INTERNAL_SYSCALL3): Likewise.
	(__INTERNAL_SYSCALL4): Likewise.
	(__INTERNAL_SYSCALL5): Likewise.
	(__INTERNAL_SYSCALL6): Likewise.
	(__INTERNAL_SYSCALL7): Likewise.
	(__INTERNAL_SYSCALL_NARGS_X): Likewise.
	(__INTERNAL_SYSCALL_NARGS): Likewise.
	(__INTERNAL_SYSCALL_DISP): Likewise.
	(INTERNAL_SYSCALL_CALL): Likewise.
	(__SYSCALL0): Rename to __INLINE_SYSCALL0.
	(__SYSCALL1): Rename to __INLINE_SYSCALL1.
	(__SYSCALL2): Rename to __INLINE_SYSCALL2.
	(__SYSCALL3): Rename to __INLINE_SYSCALL3.
	(__SYSCALL4): Rename to __INLINE_SYSCALL4.
	(__SYSCALL5): Rename to __INLINE_SYSCALL5.
	(__SYSCALL6): Rename to __INLINE_SYSCALL6.
	(__SYSCALL7): Rename to __INLINE_SYSCALL7.
	(__SYSCALL_NARGS_X): Rename to __INLINE_SYSCALL_NARGS_X.
	(__SYSCALL_NARGS): Rename to __INLINE_SYSCALL_NARGS.
	(__SYSCALL_DISP): Rename to __INLINE_SYSCALL_DISP.
	(__SYSCALL_CALL): Rename to INLINE_SYSCALL_CALL.
	(SYSCALL_CANCEL): Replace __SYSCALL_CALL with INLINE_SYSCALL_CALL.
2016-09-26 08:47:13 -07:00
Zack Weinberg
4775578486 Installed header hygiene (BZ#20366): Test of installed headers.
This adds a test to ensure that the problems fixed in the last several
patches do not recur.  Each directory checks the headers that it
installs for two properties: first, each header must be compilable in
isolation, as both C and C++, under a representative combination of
language and library conformance levels; second, there is a blacklist
of identifiers that may not appear in any installed header, currently
consisting of the legacy BSD typedefs.  (There is an exemption for the
headers that define those typedefs, and for the RPC headers.  It may be
necessary to make this more sophisticated if we add more stuff to the
blacklist in the future.)

In order for this test to work correctly, every wrapper header
that actually defines something must guard those definitions with
 #ifndef _ISOMAC.  This is the existing mechanism used by the conform/
tests to tell wrapper headers not to define anything that the public
header wouldn't, and not to use anything from libc-symbols.h.  conform/
only cares for headers that we need to check for standards conformance,
whereas this test applies to *every* header.  (Headers in include/ that
are either installed directly, or are internal-use-only and do *not*
correspond to any installed header, are not affected.)

	* scripts/check-installed-headers.sh: New script.
	* Rules: In each directory that defines header files to be installed,
	run check-installed-headers.sh on them as a special test.
	* Makefile: Likewise for the headers installed at top level.

	* include/aliases.h, include/alloca.h, include/argz.h
	* include/arpa/nameser.h, include/arpa/nameser_compat.h
	* include/elf.h, include/envz.h, include/err.h
	* include/execinfo.h, include/fpu_control.h, include/getopt.h
	* include/gshadow.h, include/ifaddrs.h, include/libintl.h
	* include/link.h, include/malloc.h, include/mcheck.h
	* include/mntent.h, include/netinet/ether.h
	* include/nss.h, include/obstack.h, include/printf.h
	* include/pty.h, include/resolv.h, include/rpc/auth.h
	* include/rpc/auth_des.h, include/rpc/auth_unix.h
	* include/rpc/clnt.h, include/rpc/des_crypt.h
	* include/rpc/key_prot.h, include/rpc/netdb.h
	* include/rpc/pmap_clnt.h, include/rpc/pmap_prot.h
	* include/rpc/pmap_rmt.h, include/rpc/rpc.h
	* include/rpc/rpc_msg.h, include/rpc/svc.h
	* include/rpc/svc_auth.h, include/rpc/xdr.h
	* include/rpcsvc/nis_callback.h, include/rpcsvc/nislib.h
	* include/rpcsvc/yp.h, include/rpcsvc/ypclnt.h
	* include/rpcsvc/ypupd.h, include/shadow.h
	* include/stdio_ext.h, include/sys/epoll.h
	* include/sys/file.h, include/sys/gmon.h, include/sys/ioctl.h
	* include/sys/prctl.h, include/sys/profil.h
	* include/sys/statfs.h, include/sys/sysctl.h
	* include/sys/sysinfo.h, include/ttyent.h, include/utmp.h
	* sysdeps/arm/nacl/include/bits/setjmp.h
	* sysdeps/mips/include/sys/asm.h
	* sysdeps/unix/sysv/linux/include/sys/sysinfo.h
	* sysdeps/unix/sysv/linux/include/sys/timex.h
	* sysdeps/x86/fpu/include/bits/fenv.h:
	Add #ifndef _ISOMAC guard around internal declarations.
	Add multiple-inclusion guard if not already present.
2016-09-23 08:43:56 -04:00
Zack Weinberg
c66b29f9cc Installed-header hygiene (BZ#20366): stack_t.
sys/ucontext.h unconditionally uses stack_t, and it does not make
sense to change that.  But signal.h only declares stack_t under
__USE_XOPEN_EXTENDED || __USE_XOPEN2K8.  The actual definition is
already in a bits header, bits/sigstack.h, but that header insists on
only being included by signal.h, so we have to change that as well as
all of the sys/ucontext.h variants.  (Some but not all variants of
bits/sigcontext.h, which sys/ucontext.h may also need, had already
received this adjustment; for consistency, I made them all the same,
even if that's not strictly necessary in some configurations.)
bits/sigcontext.h and bits/sigstack.h also all need to receive
multiple inclusion guards.

	* sysdeps/generic/sys/ucontext.h
	* sysdeps/arm/sys/ucontext.h
	* sysdeps/i386/sys/ucontext.h
	* sysdeps/m68k/sys/ucontext.h
	* sysdeps/mips/sys/ucontext.h
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h
	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h:
	Include both bits/sigcontext.h and bits/sigstack.h.
	Fix grammar error in comment, if present.

	* bits/sigstack.h
	* sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h
	* sysdeps/unix/sysv/linux/alpha/bits/sigstack.h
	* sysdeps/unix/sysv/linux/bits/sigstack.h
	* sysdeps/unix/sysv/linux/ia64/bits/sigstack.h
	* sysdeps/unix/sysv/linux/mips/bits/sigstack.h
	* sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
	* sysdeps/unix/sysv/linux/sparc/bits/sigstack.h
	* bits/sigcontext.h
	* sysdeps/mach/hurd/i386/bits/sigcontext.h
	* sysdeps/unix/sysv/linux/bits/sigcontext.h
	* sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h
	* sysdeps/unix/sysv/linux/sparc/bits/sigcontext.h:
	Add multiple inclusion guard.  Permit inclusion by sys/ucontext.h
	as well as signal.h, if this was not already allowed.  Request
	definition of size_t if necessary.  Minimize semantically-null
	differences across files.
2016-09-23 08:43:56 -04:00
Zack Weinberg
05b68e14b1 Installed-header hygiene (BZ#20366): time.h types.
Many headers are expected to expose a subset of the type definitions
in time.h.  time.h has a whole bunch of messy logic for conditionally
defining some its types and structs, but, as best I can tell, this
has never worked 100%.  In particular, __need_timespec is ineffective
if _TIME_H has already been defined, which means that if you compile

  #include <time.h>
  #include <sched.h>

with e.g. -fsyntax-only -std=c89 -Wall -Wsystem-headers, you will get

In file included from test.c:2:0:
/usr/include/sched.h:74:57: warning: "struct timespec" declared inside
  parameter list will not be visible outside of this definition or declaration
 extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW;
                                                         ^~~~~~~~

And if you want to _use_ sched_rr_get_interval in a TU compiled that
way, you're hosed.

This patch replaces all of that with small bits/types/TYPE.h headers
as introduced earlier.  time.h and bits/time.h are now *much* simpler,
and a lot of other headers are slightly simpler.

	* time/time.h, bits/time.h, sysdeps/unix/sysv/linux/bits/time.h:
	Remove all logic conditional on __need macros.  Move all the
	conditionally defined types to their own headers...
	* time/bits/types/clock_t.h: Define clock_t here.
	* time/bits/types/clockid_t.h: Define clockid_t here.
	* time/bits/types/struct_itimerspec.h: Define struct itimerspec here.
	* time/bits/types/struct_timespec.h: Define struct timespec here.
	* time/bits/types/struct_timeval.h: Define struct timeval here.
	* time/bits/types/struct_tm.h: Define struct tm here.
	* time/bits/types/time_t.h: Define time_t here.
	* time/bits/types/timer_t.h: Define timer_t here.
	* time/Makefile: Install the new headers.

	* bits/resource.h, io/fcntl.h, io/sys/poll.h, io/sys/stat.h
	* io/utime.h, misc/sys/select.h, posix/sched.h, posix/sys/times.h
	* posix/sys/types.h, resolv/netdb.h, rt/aio.h, rt/mqueue.h
	* signal/signal.h, pthread/semaphore.h, sysdeps/nptl/pthread.h
	* sysdeps/unix/sysv/linux/alpha/bits/resource.h
	* sysdeps/unix/sysv/linux/alpha/sys/acct.h
	* sysdeps/unix/sysv/linux/bits/resource.h
	* sysdeps/unix/sysv/linux/bits/timex.h
	* sysdeps/unix/sysv/linux/mips/bits/resource.h
	* sysdeps/unix/sysv/linux/net/ppp_defs.h
	* sysdeps/unix/sysv/linux/sparc/bits/resource.h
	* sysdeps/unix/sysv/linux/sys/acct.h
	* sysdeps/unix/sysv/linux/sys/timerfd.h
	* sysvipc/sys/msg.h, sysvipc/sys/sem.h, sysvipc/sys/shm.h
	* time/sys/time.h, time/sys/timeb.h
	Use the new bits/types headers.

	* include/time.h: Remove __need logic.
	* include/bits/time.h
	* include/bits/types/clock_t.h, include/bits/types/clockid_t.h
	* include/bits/types/time_t.h, include/bits/types/timer_t.h
	* include/bits/types/struct_itimerspec.h
	* include/bits/types/struct_timespec.h
	* include/bits/types/struct_timeval.h
	* include/bits/types/struct_tm.h:
	New wrapper headers.
2016-09-23 08:43:56 -04:00
Zack Weinberg
f2bea4da2e Installed-header hygiene (BZ#20366): conditionally defined structures.
Several network-related structures are defined conditionally under
__USE_MISC, but unconditionally used by other headers.  The path of
least resistance is usually to condition the uses on __USE_MISC as
well.

	* sysdeps/mach/hurd/net/if_ppp.h
	* sysdeps/unix/sysv/linux/net/if_ppp.h:
        Only define struct ifpppstatsreq and struct ifpppcstatsreq
        if __USE_MISC is defined, to ensure struct ifreq is declared.

	* inet/netinet/ether.h: Condition all function prototypes
        on __USE_MISC, to ensure struct ether_addr is declared.

sys/socket.h defines struct osockaddr only under __USE_MISC, whereas
protocols/talkd.h requires it unconditionally.  Here it doesn't make
sense to condition the entire body of protocols/talkd.h on __USE_MISC.
Rather than complicate sys/socket.h with a __need macro or duplicate
the definition, I am introducing a new concept: tiny headers named
bits/types/TYPE.h that define TYPE and nothing else.  This can, I hope,
ultimately replace *all* the __need macros.  The guard macro for such
headers will be __TYPE_defined, just in case application or third-party
library code is looking at them.

	* socket/bits/types/struct_osockaddr.h: New header.
	* include/bits/types/struct_osockaddr.h: New wrapper.
	* socket/Makefile: Install the new header.
	* socket/sys/socket.h,  inet/protocols/talkd.h:
	Refer to bits/types/struct_osockaddr.h for the definition of
	struct osockaddr.
2016-09-23 08:43:56 -04:00
Zack Weinberg
11160cb76f Installed-header hygiene (BZ#20366): obsolete BSD u_* types.
The types u_char, u_short, u_int, u_long, ushort, uint, ulong, u_int8_t,
u_int16_t, u_int32_t, u_int64_t, quad_t, and u_quad_t are BSDisms that
have never been standardized.  While glibc should continue to *provide*
these types for compatibility's sake, its public headers should not
use them.

The meat of this change was mechanically generated by the following
shell command:

    perl -pi~ -e '
        s/\b(__)?u_char\b/unsigned char/g;
        s/\b(__)?u_?short\b/unsigned short/g;
        s/\b(__)?u_?int\b/unsigned int/g;
        s/\b(__)?u_?long\b/unsigned long/g;
        s/\b(__)?u_int8_t\b/uint8_t/g;
        s/\b(__)?u_int16_t\b/uint16_t/g;
        s/\b(__)?u_int32_t\b/uint32_t/g;
        s/\b(__)?u_int64_t\b/uint64_t/g;
        s/\b(__)?u_quad_t\b/uint64_t/g;
        s/\b(__)?quad_t\b/uint64_t/g;
    ' $(grep -lE -e '\<((__)?(quad_t|u(short|int|long|_(char|short|int([0-9]+_t)?|long|quad_t))))\>' \
        $(grep -LE '\<(_(SYS|BITS)_TYPES_H|rpc/(rpc|rpc_msg|types|xdr)\.h)\>' \
          $(find . \( -false $(sed 's/^/-o -name /' all-installed-headers) \
                   \) -printf '%P\n' | sort -u)))

where 'all-installed-headers' was a list of the basenames of all installed
header files, manually extracted from the Makefiles.  Non-installed
wrapper headers in include/ are also adjusted, for consistency.
I then manually fixed up indentation and line-wrapping.

sys/types.h and bits/types.h are excluded because they must continue
to define the u_* types (under __USE_MISC) for compatibility with
applications.  They do not use these types themselves.

All headers that (transitively) include rpc/types.h are also excluded,
for three reasons.  First, the u_* types are defined by rpc/types.h,
unconditionally (not just under __USE_MISC) so they are logically part
of the SunRPC API.  Second, many of those headers appear to be
machine-generated.  Third, it's my understanding that we are getting
rid of as much of SunRPC as possible in the near future.

(The one file under sunrpc/ that's touched, sunrpc/rpc/rpc_des.h, does
*not* include rpc/types.h.  This may itself be a bug.)

After changing from u_intNN_t to uintNN_t, a number of headers now
need to include stdint.h to pick up those types.  It might be more
hygenic, namespace-wise, to use __uintNN_t instead, but none of these
headers are bound by ISO or POSIX to do so, and it's unlikely that
anyone using them will be bothered.  (The two files that were using
__-prefixed versions of the u_types, sysdeps/mach/hurd/net/route.h and
sysdeps/unix/sysv/linux/net/route.h, both already also contained uses of
the unprefixed versions.)

Some of these files directly included features.h and/or sys/cdefs.h,
which I removed, as the style generally seems to be to let sys/types.h
do that for us.  (This does not change the set of definitions exposed
by any header; sys/types.h unconditionally includes both features.h
and sys/cdefs.h.)

One file included asm/types.h unnecessarily.

	* bits/in.h, gmon/sys/gmon.h, inet/netinet/igmp.h
	* inet/protocols/routed.h, inet/protocols/talkd.h
	* inet/protocols/timed.h, io/fts.h, nptl_db/thread_db.h
	* resolv/arpa/nameser.h, resolv/resolv.h, sunrpc/rpc/rpc_des.h
	* sysdeps/generic/netinet/if_ether.h
	* sysdeps/generic/netinet/in_systm.h
	* sysdeps/generic/netinet/ip.h, sysdeps/generic/netinet/tcp.h
	* sysdeps/gnu/netinet/ip_icmp.h, sysdeps/gnu/netinet/tcp.h
	* sysdeps/gnu/netinet/udp.h, sysdeps/mach/hurd/net/ethernet.h
	* sysdeps/mach/hurd/net/if_arp.h
	* sysdeps/mach/hurd/net/if_ppp.h
	* sysdeps/mach/hurd/net/route.h, sysdeps/mach/sys/reboot.h
	* sysdeps/unix/sysv/linux/bits/in.h
	* sysdeps/unix/sysv/linux/net/ethernet.h
	* sysdeps/unix/sysv/linux/net/if_arp.h
	* sysdeps/unix/sysv/linux/net/if_ppp.h
	* sysdeps/unix/sysv/linux/net/if_shaper.h
	* sysdeps/unix/sysv/linux/net/route.h
	* sysdeps/unix/sysv/linux/netinet/if_ether.h
	* sysdeps/unix/sysv/linux/netinet/if_fddi.h
	* sysdeps/unix/sysv/linux/netinet/if_tr.h
	* sysdeps/unix/sysv/linux/netipx/ipx.h
	* sysdeps/unix/sysv/linux/sys/acct.h
	* include/arpa/nameser.h, include/resolv.h:
	Change all uses of u_char to unsigned char,
	u_short and ushort to unsigned short, u_int and uint to unsigned int,
	u_long and ulong to unsigned long, u_int8_t to uint8_t,
        u_int16_t to uint16_t, u_int32_t to uint32_t, quad_t to int64_t,
	and u_int64_t and u_quad_t to uint64_t.

	* mach/sys/reboot.h: Remove two casts of integer literals
	to the types they already have.

	* bits/in.h: Correct error in description of IP_MULTICAST_LOOP.
	* sysdeps/unix/sysv/linux/bits/in.h: Likewise.
	* sysdeps/unix/sysv/linux/netinet/if_ether.h: Change a comment
	from referring to 'unsigned char' to 'uint8_t' for consistency with
	the macro definition below.

	* gmon/sys/gmon.h, inet/netinet/igmp.h, inet/protocols/talkd.h
	* io/fts.h, resolv/arpa/nameser.h, resolv/resolv.h
	* sunrpc/rpc/rpc_des.h, sysdeps/generic/netinet/ip.h
	* sysdeps/gnu/netinet/tcp.h, sysdeps/gnu/netinet/udp.h
	* sysdeps/mach/hurd/net/if_ppp.h, sysdeps/unix/sysv/linux/net/if_ppp.h
	* sysdeps/unix/sysv/linux/sys/acct.h
	* include/arpa/nameser.h, include/resolv.h:
	Fix indentation disrupted by mechanical edits.

	* inet/protocols/talkd.h, resolv/arpa/nameser.h
	* sysdeps/generic/netinet/in_systm.h
	* sysdeps/gnu/netinet/ip_icmp.h, sysdeps/gnu/netinet/tcp.h
	* sysdeps/gnu/netinet/udp.h
	* sysdeps/unix/sysv/linux/net/ethernet.h
	* sysdeps/unix/sysv/linux/net/if_arp.h
	* sysdeps/unix/sysv/linux/net/if_ppp.h
	* sysdeps/unix/sysv/linux/net/if_shaper.h
	* sysdeps/unix/sysv/linux/netinet/if_fddi.h
	* sysdeps/unix/sysv/linux/netinet/if_tr.h
	* sysdeps/unix/sysv/linux/netipx/ipx.h
	* sysdeps/unix/sysv/linux/sys/acct.h
	Include stdint.h for uintNN_t definitions.
	Don't include sys/cdefs.h, features.h, or asm/types.h directly.
2016-09-23 08:43:56 -04:00
Zack Weinberg
cb765808fb Installed-header hygiene (BZ#20366): Simple self-contained fixes.
Some headers did not include all of their prerequisite headers.

	* rpcsvc/nislib.h: Include rpcsvc/nis.h.
	* sysdeps/unix/sysv/linux/netrose/rose.h:
	Include sys/socket.h and netax25/ax25.h.

<endian.h> only defines BYTE_ORDER, BIG_ENDIAN, LITTLE_ENDIAN,
etc. under __USE_MISC; glibc's headers should use __BYTE_ORDER,
__BIG_ENDIAN, __LITTLE_ENDIAN, etc. instead.

	* inet/netinet/icmp6.h, inet/netinet/ip6.h
	* resolv/arpa/nameser_compat.h:
	Use __BYTE_ORDER etc. instead of BYTE_ORDER etc.

sys/types.h only conditionally defines caddr_t and clockid_t.

	* sysdeps/unix/sysv/linux/sys/quota.h:
	Use __caddr_t instead of caddr_t.
	* sysdeps/unix/sysv/linux/sys/timerfd.h:
	Use __clockid_t instead of clockid_t.

Remove a #warning that was the sole actual problem with using sys/ipc.h
without _GNU_SOURCE/_XOPEN_SOURCE.

	* sysvipc/sys/ipc.h: Remove unnecessary #warning.

_LIBC, __USE_XOPEN2K8, and __STDC_VERSION__ are not always defined.

It seems to me that _LIBC should not appear in installed headers, but
avoiding that for argp specifically would require more surgery than
feels appropriate for this patch set.  It's possible that
"#ifdef _LIBC" would be sufficient, but I wanted to be conservative.

All three versions of bits/socket.h want to know whether __flexarr
will produce a real flexible array member -- specifically, one that
doesn't alter sizeof(the structure containing it).  They were testing
for this with a complicated #if condition that did not agree with
sys/cdefs.h and that tripped -Wundef warnings under -std=c90.
I added a new macro to sys/cdefs.h, __glibc_c99_flexarr_available,
which reveals exactly what these headers want to know.  I also took
the opportunity to flatten the rather messy conditional nest defining
__flexarr.

	* argp/argp.h: Check whether _LIBC is defined before expanding it.
	* posix/glob.h: Check whether __USE_XOPEN2K8 is defined instead
	of expanding it.

	* misc/sys/cdefs.h: Tidy up conditional nest defining __flexarr.
	Define __glibc_c99_flexarr_available to 1 when the compiler
	supports C99-compatible flexible array members, 0 otherwise.
	* sysdeps/unix/sysv/linux/bits/socket.h
	* sysdeps/mach/hurd/bits/socket.h
	* bits/socket.h: Use __glibc_c99_flexarr_available in
	definitions of struct cmsghdr and CMSG_DATA.
2016-09-23 08:43:55 -04:00
Samuel Thibault
444eacba82 hurd: Fix stack pointer corruption in syscall
Thanks Justus Winter for the report.

	* sysdeps/mach/i386/syscall.S (syscall): Push back syscall number.
2016-09-22 02:43:39 +02:00
Samuel Thibault
e67f54ab1a hurdmalloc: Run fork handler as late as possible [BZ #19431]
This is the hurd-specific follow-up for
29d794863c : hurdmalloc also needs the
same fix

	* hurd/hurdmalloc.c (malloc_fork_prepare): Rename to
	_hurd_malloc_fork_prepare.
	(malloc_fork_parent): Rename to _hurd_malloc_fork_parent.
	(malloc_fork_child): Rename to _hurd_malloc_fork_child.
	(_hurd_fork_prepare_hook): Drop malloc_fork_prepare.
	(_hurd_fork_parent_hook): Drop malloc_fork_parent.
	(_hurd_fork_child_hook): Drop malloc_fork_child.
	* hurd/hurdmalloc.h (_hurd_malloc_fork_prepare,
	_hurd_malloc_fork_parent, _hurd_malloc_fork_child): Add declarations.
	* sysdeps/mach/hurd/fork.c (__fork): Call __malloc_fork_lock_parent
	after locking locks (notably hurd_dtable_lock). Call
	_hurd_malloc_fork_prepare after that. Call _hurd_malloc_fork_parent
	before __malloc_fork_unlock_parent and _hurd_malloc_fork_child before
	__malloc_fork_unlock_child.
2016-09-22 01:45:48 +02:00
Joseph Myers
5b17fd0da6 Add <stdint.h> integer width macros.
TS 18661-1 defines macros for the width of integer types, intended for
use with the fromfp functions to convert from floating-point types to
integer types of any width, in any rounding mode and with control over
whether "inexact" is raised.  Such macros are, of course, more
generally useful than just with those functions.

Those macros are added to <limits.h> and <stdint.h>.  Having
previously added the <limits.h> macros, this patch adds the <stdint.h>
ones.  I've also added these macros to GCC's headers for GCC 7, but
for glibc systems, the definitions in GCC's <stdint.h> will only be
used with -ffreestanding.

Tested for x86_64 and x86.

	* sysdeps/generic/stdint.h: Define
	__GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include
	<bits/libc-header-start.h> instead of including <features.h>.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT8_WIDTH): New macro.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT8_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT16_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT16_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT32_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT32_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT64_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT64_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_LEAST8_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_LEAST8_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_LEAST16_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_LEAST16_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_LEAST32_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_LEAST32_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_LEAST64_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_LEAST64_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_FAST8_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_FAST8_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_FAST16_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_FAST16_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_FAST32_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_FAST32_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_FAST64_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_FAST64_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INTPTR_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINTPTR_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (INTMAX_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (UINTMAX_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (PTRDIFF_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (SIG_ATOMIC_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (SIZE_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (WCHAR_WIDTH): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (WINT_WIDTH): Likewise.
	* manual/arith.texi (Integers): Document these macros for types
	specified by width properties.
	* manual/lang.texi (Width of Type): Document these macros for
	other standard typedefs.
	* stdlib/tst-width-stdint.c: New file.
	* stdlib/Makefile (tests): Add tst-width-stdint.
2016-09-21 17:06:36 +00:00
Florian Weimer
cbb47fa1c6 malloc: Manual part of conversion to __libc_lock
This removes the old mutex_t-related definitions from malloc-machine.h,
too.
2016-09-21 16:28:08 +02:00
Adhemerval Zanella
802c1c5a65 posix: Correctly block/unblock all signals on Linux posix_spawn
This patch correctly block and unblocks all signals when executing
Linux posix_spawn by using the __libc_signal_{un}block_all functions
instead of default sigprocmask.  The latter might remove both
SIGCANCEL and SIGSETXID from the blocked signal list.

Checked on x86_64, i686, powerpc64le, and aarch64.

	* sysdeps/unix/sysv/linux/spawni.c (__spawnix): Correctly block and unblock
	all signals when executing the clone vfork child.
	(SIGALL_SET): Remove macro.
2016-09-20 17:18:15 -03:00
Adhemerval Zanella
706e6749de posix: Correctly enable/disable cancellation on Linux posix_spawn
This patch correctly enable and disable asynchronous cancellation on
Linux posix_spawn.  Current code invert the logic by enabling and
disabling instead.  It also adds a new test to check if posix_spawn
is not a cancellation entrypoint.

Checked on x86_64, i686, powerpc64le, and aarch64.

	* nptl/Makefile (tests): Add tst-exec5.
	* nptl/tst-exec5.c: New file.
	* sysdeps/unix/sysv/linux/spawni.c (__spawni): Correctly enable and disable
	asynchronous cancellation.
2016-09-20 17:18:15 -03:00
Paul E. Murphy
2c46d11486 Build s_nan* objects from a generic template
This requires adding a macro to synthesize the call
to __strto*_nan.  Since this is likely to be the only
usage ever for strto* functions in generated libm
calls, a dedicated macro is defined for it.
2016-09-20 14:37:42 -05:00
Paul E. Murphy
fc7f4691d3 Remove __nan{f,,l} macros
Use the GCC builtin instead.  With the exception of the
files built from a template, they are unused.  This
is preparation for making the s_nanF objects generated.
2016-09-20 14:37:41 -05:00
Paul E. Murphy
9f9834f582 Make ldexpF generic.
This one is a little more tricky since it is built both for
libm and libc, and exports multiple aliases.

To simplify aliasing, a new macro is introduced which handles
aliasing to two symbols.  By default, it just applies
declare_mgen_alias to both target symbols.

Likewise, the makefile is tweaked a little to generate
templates for shared files too, and a new rule is added
to build m_*.c objects from the objpfx directory.

Verified there are no symbol or code changes using a script
to diff the *_ldexp* object files on s390x, aarch64, arm,
x86_64, and ppc64.
2016-09-20 14:37:40 -05:00
Florian Weimer
8837917cf1 Remove remnants of .og patterns
This was used by --enable-omitfp, and the bulk of it was removed in this
commit:

commit bdeba1354b
Author: Ulrich Drepper <drepper@gmail.com>
Date:   Sat Jan 7 11:29:31 2012 -0500

    Remove --enable-omitfp support
2016-09-20 12:18:13 +02:00
Tulio Magno Quites Machado Filho
1850ce5a2e powerpc: Fix POWER9 implies
Fix multiarch build for POWER9 by correcting the order of the
directories listed at sysnames configure variable.
2016-09-19 09:35:38 -03:00
Samuel Thibault
455d6e4373 hurd: fix fcntl visibility
* sysdeps/posix/dup.c (__dup): Call __fcntl instead of fcntl.
2016-09-18 23:48:55 +02:00
Adhemerval Zanella
09cb278539 nptl: Consolidate sem_init implementations
Current sparc32 sem_init and default one only differ on sem.newsem.pad
initialization.  This patch removes sparc32 and sparc32v9 sem_init arch
specific implementation and set sparc32 to use nptl default one.
The default implementation sets the required sem.newsem.pad to 0 (which
is ununsed in other architectures).

I checked on i686 and a sparc32v9 build.

        * nptl/sem_init.c (sem_init): Init pad value to 0.
        * sysdeps/sparc/sparc32/sem_init.c: Remove file.
        * sysdeps/sparc/sparc32/sparcv9/sem_init.c: Likewise.
2016-09-15 16:31:50 -03:00
Adhemerval Zanella
fbc994921b rt: Set shm_open as a non cancellation point (BZ #18243)
This patch changes shm_open to not act as a cancellation point.
Cancellation is disable at start and reenable in function exit.
It fixes BZ #18243.

Tested on x86_64 and i686.

	[BZ #18243]
	* rt/Makefile (test): Add tst-shm-cancel.
	* rt/tst-shm-cancel.c: New file.
	* sysdeps/posix/shm_open.c: Disable asynchronous cancellation.
2016-09-15 11:15:14 -03:00
Adhemerval Zanella
49ad334ab1 nptl: Remove sparc sem_wait
This patch removes the sparc32 sem_wait.c implementation since it is
identical to default nptl one.  The sparcv9 is no longer required with
the removal.

Checked with a sparcv9 build.

	* sysdeps/sparc/sparc32/sem_wait.c: Remove file.
	* sysdeps/sparc/sparc32/sparcv9/sem_wait.c: Likewise.
2016-09-15 11:14:30 -03:00
Adhemerval Zanella
980d25d53e nptl: Consolidate sem_open implementations
Current sparc32 sem_open and default one only differ on:

  1. Default one contains a 'futex_supports_pshared' check.
  2. sem.newsem.pad is initialized to zero.

This patch removes sparc32 and sparc32v9 sem_open arch specific
implementation and instead set sparc32 to use nptl default one.
Using 1. is fine since it should always evaluate 0 for Linux
(an optimized away by the compiler). Adding 2. to default
implementation should be ok since 'pad' field is used mainly
on sparc32 code.

I checked on i686 and checked a sparc32v9 build.

	* nptl/sem_open.c (sem_open): Init pad value to 0.
	* sysdeps/sparc/sparc32/sem_open.c: Remove file.
	* sysdeps/sparc/sparc32/sparcv9/sem_open.c: Likewise.
2016-09-15 11:13:10 -03:00
Florian Weimer
80d8cb91de inet: Add __inet6_scopeid_pton function [BZ #20611]
__inet6_scopeid_pton implements strict validation of numeric scope IDs.
Use it in getaddrinfo and __res_vinit.
2016-09-15 15:46:30 +02:00
Florian Weimer
a0a9b6e376 Remove the ptw-% patterns
Nothing depends on the PTW macro anymore, so the mechanism to define
PTW for recompliations of libc routines is no longer needed.  The
source files are still recompiled for the nptl directory, just without
the “ptw-” prefix.

(Reducing the number of pattern rules in sysd-rules is critical for
improving make performance.)
2016-09-14 16:02:06 +02:00
Paul E. Murphy
02bbfb414f ldbl-128: Use L(x) macro for long double constants
This runs the attached sed script against these files using
a regex which aggressively matches long double literals
when not obviously part of a comment.

Likewise, 5 digit or less integral constants are replaced
with integer constants, excepting the two cases of 0 used
in large tables, which are also the only integral values
of the form x.0*E0L encountered within these converted
files.

Likewise, -L(x) is transformed into L(-x).

Naturally, the script has a few minor hiccups which are
more clearly remedied via the attached fixup patch.  Such
hiccups include, context-sensitive promotion to a real
type, and munging constants inside harder to detect
comment blocks.
2016-09-13 15:33:59 -05:00
Joseph Myers
f222706311 Add e500 version of fetestexceptflag.
When I added fetestexceptflag, I missed that e500 was another case
that needed its own version because saved exceptions were not directly
stored in a form that could be ANDed with exception bits (they were
stored with exceptions in SPE form, but the FE_* macros always use the
classic hard-float form).  This patch adds an e500 version with the
required call to __fexcepts_from_spe to convert from one form to the
other.

Tested for e500.

	* sysdeps/powerpc/powerpc32/e500/nofpu/fetestexceptflag.c: New
	file.
2016-09-07 17:47:11 +00:00
Joseph Myers
ed29339bf9 Add femode_t functions: sparc.
This patch adds SPARC versions of fegetmode and fesetmode.  Untested.

	* sysdeps/sparc/fpu/fegetmode.c: New file.
	* sysdeps/sparc/fpu/fesetmode.c: Likewise.
2016-09-07 16:48:41 +00:00
Joseph Myers
d0a83af082 Add femode_t functions: sh.
This patch adds SH versions of fegetmode and fesetmode.  Untested.

	* sysdeps/sh/sh4/fpu/fegetmode.c: New file.
	* sysdeps/sh/sh4/fpu/fesetmode.c: Likewise.
2016-09-07 16:48:08 +00:00
Joseph Myers
86bb437d6a Add femode_t functions: s390.
This patch adds S/390 versions of fegetmode and fesetmode.  Untested.

	* sysdeps/s390/fpu/fegetmode.c: New file.
	* sysdeps/s390/fpu/fesetmode.c: Likewise.
2016-09-07 16:47:30 +00:00
Joseph Myers
9969e62e74 Add femode_t functions: powerpc.
This patch adds PowerPC versions of fegetmode and fesetmode.

	* sysdeps/powerpc/fpu/fegetmode.c: New file.
	* sysdeps/powerpc/fpu/fesetmode.c: Likewise.
	* sysdeps/powerpc/nofpu/fegetmode.c: Likewise.
	* sysdeps/powerpc/nofpu/fesetmode.c: Likewise.
	* sysdeps/powerpc/powerpc32/e500/nofpu/fegetmode.c: Likewise.
	* sysdeps/powerpc/powerpc32/e500/nofpu/fesetmode.c: Likewise.
2016-09-07 16:46:47 +00:00
Joseph Myers
997290d914 Add femode_t functions: mips.
This patch adds MIPS versions of fegetmode and fesetmode.

	* sysdeps/mips/fpu/fegetmode.c: New file.
	* sysdeps/mips/fpu/fesetmode.c: Likewise.
2016-09-07 16:46:02 +00:00
Joseph Myers
cfb6a3452e Add femode_t functions: m68k.
This patch adds M68K versions of fegetmode and fesetmode.  Untested.

	* sysdeps/m68k/fpu/fegetmode.c: New file.
	* sysdeps/m69k/fpu/fesetmode.c: Likewise.
2016-09-07 16:45:21 +00:00
Joseph Myers
22dda71b0b Add femode_t functions: ia64.
This patch adds IA64 versions of fegetmode and fesetmode.  Untested.

	* sysdeps/ia64/fpu/fegetmode.c: New file.
	* sysdeps/ia64/fpu/fesetmode.c: Likewise.
2016-09-07 16:44:22 +00:00
Joseph Myers
dbc84b9366 Add femode_t functions: hppa.
This patch adds HPPA versions of fegetmode and fesetmode.  Untested.

	* sysdeps/hppa/fpu/fegetmode.c: New file.
	* sysdeps/hppa/fpu/fesetmode.c: Likewise.
2016-09-07 16:43:43 +00:00
Joseph Myers
2c9e80e7d4 Add femode_t functions: arm.
This patch adds ARM versions of fegetmode and fesetmode.

	* sysdeps/arm/fegetmode.c: New file.
	* sysdeps/arm/fesetmode.c: Likewise.
2016-09-07 16:43:03 +00:00
Joseph Myers
297c592e2e Add femode_t functions: alpha.
This patch adds Alpha versions of fegetmode and fesetmode.  Untested.

	* sysdeps/alpha/fpu/fegetmode.c: New file.
	* sysdeps/alpha/fpu/fesetmode.c: Likewise.
2016-09-07 16:42:19 +00:00
Joseph Myers
1396c647a9 Add femode_t functions: aarch64.
This patch adds AArch64 versions of fegetmode and fesetmode.
Untested.

	* sysdeps/aarch64/fpu/fegetmode.c: New file.
	* sysdeps/aarch64/fpu/fesetmode.c: Likewise.
2016-09-07 16:41:20 +00:00
Joseph Myers
ec94343f59 Add femode_t functions.
TS 18661-1 defines a type femode_t to represent the set of dynamic
floating-point control modes (such as the rounding mode and trap
enablement modes), and functions fegetmode and fesetmode to manipulate
those modes (without affecting other state such as the raised
exception flags) and a corresponding macro FE_DFL_MODE.

This patch series implements those interfaces for glibc.  This first
patch adds the architecture-independent pieces, the x86 and x86_64
implementations, and the <bits/fenv.h> and ABI baseline updates for
all architectures so glibc keeps building and passing the ABI tests on
all architectures.  Subsequent patches add the fegetmode and fesetmode
implementations for other architectures.

femode_t is generally an integer type - the same type as fenv_t, or as
the single element of fenv_t where fenv_t is a structure containing a
single integer (or the single relevant element, where it has elements
for both status and control registers) - except where architecture
properties or consistency with the fenv_t implementation indicate
otherwise.  FE_DFL_MODE follows FE_DFL_ENV in whether it's a magic
pointer value (-1 cast to const femode_t *), a value that can be
distinguished from valid pointers by its high bits but otherwise
contains a representation of the desired register contents, or a
pointer to a constant variable (the powerpc case; __fe_dfl_mode is
added as an exported constant object, an alias to __fe_dfl_env).

Note that where architectures (that share a register between control
and status bits) gain definitions of new floating-point control or
status bits in future, the implementations of fesetmode for those
architectures may need updating (depending on whether the new bits are
control or status bits and what the implementation does with
previously unknown bits), just like existing implementations of
<fenv.h> functions that take care not to touch reserved bits may need
updating when the set of reserved bits changes.  (As any new bits are
outside the scope of ISO C, that's just a quality-of-implementation
issue for supporting them, not a conformance issue.)

As with fenv_t, femode_t should properly include any software DFP
rounding mode (and for both fenv_t and femode_t I'd consider that
fragment of DFP support appropriate for inclusion in glibc even in the
absence of the rest of libdfp; hardware DFP rounding modes should
already be included if the definitions of which bits are status /
control bits are correct).

Tested for x86_64, x86, mips64 (hard float, and soft float to test the
fallback version), arm (hard float) and powerpc (hard float, soft
float and e500).  Other architecture versions are untested.

	* math/fegetmode.c: New file.
	* math/fesetmode.c: Likewise.
	* sysdeps/i386/fpu/fegetmode.c: Likewise.
	* sysdeps/i386/fpu/fesetmode.c: Likewise.
	* sysdeps/x86_64/fpu/fegetmode.c: Likewise.
	* sysdeps/x86_64/fpu/fesetmode.c: Likewise.
	* math/fenv.h: Update comment on inclusion of <bits/fenv.h>.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (fegetmode): New function
	declaration.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (fesetmode): Likewise.
	* bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New
	typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/aarch64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/alpha/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/arm/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/hppa/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/ia64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/m68k/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/microblaze/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/mips/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/nios2/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/powerpc/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (__fe_dfl_mode): New variable
	declaration.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/s390/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/sh/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/sparc/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/tile/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/x86/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* manual/arith.texi (FE_DFL_MODE): Document macro.
	(fegetmode): Document function.
	(fesetmode): Likewise.
	* math/Versions (fegetmode): New libm symbol at version
	GLIBC_2.25.
	(fesetmode): Likewise.
	* math/Makefile (libm-support): Add fegetmode and fesetmode.
	(tests): Add test-femode and test-femode-traps.
	* math/test-femode-traps.c: New file.
	* math/test-femode.c: Likewise.
	* sysdeps/powerpc/fpu/fenv_const.c (__fe_dfl_mode): Declare as
	alias for __fe_dfl_env.
	* sysdeps/powerpc/nofpu/fenv_const.c (__fe_dfl_mode): Likewise.
	* sysdeps/powerpc/powerpc32/e500/nofpu/fenv_const.c
	(__fe_dfl_mode): Likewise.
	* sysdeps/powerpc/Versions (__fe_dfl_mode): New libm symbol at
	version GLIBC_2.25.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-09-07 16:40:09 +00:00
H.J. Lu
fb0f7a6755 X86-64: Add _dl_runtime_resolve_avx[512]_{opt|slow} [BZ #20508]
There is transition penalty when SSE instructions are mixed with 256-bit
AVX or 512-bit AVX512 load instructions.  Since _dl_runtime_resolve_avx
and _dl_runtime_profile_avx512 save/restore 256-bit YMM/512-bit ZMM
registers, there is transition penalty when SSE instructions are used
with lazy binding on AVX and AVX512 processors.

To avoid SSE transition penalty, if only the lower 128 bits of the first
8 vector registers are non-zero, we can preserve %xmm0 - %xmm7 registers
with the zero upper bits.

For AVX and AVX512 processors which support XGETBV with ECX == 1, we can
use XGETBV with ECX == 1 to check if the upper 128 bits of YMM registers
or the upper 256 bits of ZMM registers are zero.  We can restore only the
non-zero portion of vector registers with AVX/AVX512 load instructions
which will zero-extend upper bits of vector registers.

This patch adds _dl_runtime_resolve_sse_vex which saves and restores
XMM registers with 128-bit AVX store/load instructions.  It is used to
preserve YMM/ZMM registers when only the lower 128 bits are non-zero.
_dl_runtime_resolve_avx_opt and _dl_runtime_resolve_avx512_opt are added
and used on AVX/AVX512 processors supporting XGETBV with ECX == 1 so
that we store and load only the non-zero portion of vector registers.
This avoids SSE transition penalty caused by _dl_runtime_resolve_avx and
_dl_runtime_profile_avx512 when only the lower 128 bits of vector
registers are used.

_dl_runtime_resolve_avx_slow is added and used for AVX processors which
don't support XGETBV with ECX == 1.  Since there is no SSE transition
penalty on AVX512 processors which don't support XGETBV with ECX == 1,
_dl_runtime_resolve_avx512_slow isn't provided.

	[BZ #20495]
	[BZ #20508]
	* sysdeps/x86/cpu-features.c (init_cpu_features): For Intel
	processors, set Use_dl_runtime_resolve_slow and set
	Use_dl_runtime_resolve_opt if XGETBV suports ECX == 1.
	* sysdeps/x86/cpu-features.h (bit_arch_Use_dl_runtime_resolve_opt):
	New.
	(bit_arch_Use_dl_runtime_resolve_slow): Likewise.
	(index_arch_Use_dl_runtime_resolve_opt): Likewise.
	(index_arch_Use_dl_runtime_resolve_slow): Likewise.
	* sysdeps/x86_64/dl-machine.h (elf_machine_runtime_setup): Use
	_dl_runtime_resolve_avx512_opt and _dl_runtime_resolve_avx_opt
	if Use_dl_runtime_resolve_opt is set.  Use
	_dl_runtime_resolve_slow if Use_dl_runtime_resolve_slow is set.
	* sysdeps/x86_64/dl-trampoline.S: Include <cpu-features.h>.
	(_dl_runtime_resolve_opt): New.  Defined for AVX and AVX512.
	(_dl_runtime_resolve): Add one for _dl_runtime_resolve_sse_vex.
	* sysdeps/x86_64/dl-trampoline.h (_dl_runtime_resolve_avx_slow):
	New.
	(_dl_runtime_resolve_opt): Likewise.
	(_dl_runtime_profile): Define only if _dl_runtime_profile is
	defined.
2016-09-06 08:51:07 -07:00
Stefan Liebler
a0d47f487f S390: Support PLT and GOT references in check-localplt.
on s390x the test elf/check-localplt is failing after recent commits:
"elf: Do not use memalign for TCB/TLS blocks allocation [BZ #17730]"
"elf: Avoid using memalign for TLS allocations [BZ #17730]"
"elf: dl-minimal malloc needs to respect fundamental alignment"
due to "Missing required PLT reference: ld.so: __libc_memalign".

After the commits __libc_memalign is only called in elf/dl-minimal.c in
malloc() function in ld.so and gcc -O2/-O3 leads to R_390_GLOB_DAT
instead of R_390_JMP_SLOT. __libc_memalign is called via
function-pointer loaded from GOT instead of calling via a plt-stub. In
this case there is the R_390_GLOB_DAT relocation in section .rela.dyn
instead of R_390_JMP_SLOT in .rela.plt.
This patch marks ld.so: __libc_memalign with R_390_GLOB_DAT in
localplt.data to allow both relocations.
If build with -fno-optimize-sibling-calls or on s390(31bit) a
R_390_JMP_SLOT is generated.

ChangeLog:

	* sysdeps/unix/sysv/linux/s390/localplt.data: Mark
	ld.so: __libc_memalign with "+ RELA R_390_GLOB_DAT".
2016-09-06 14:44:15 +02:00
Roland McGrath
6b75ba1388 NaCl: Fix compile error for __dup after libc_hidden_proto addition.
* sysdeps/nacl/dup.c: Add libc_hidden_def.
2016-09-02 16:58:42 -07:00
Roland McGrath
9a3d16ac15 Fix generic wait3 after union wait_status removal.
* sysdeps/posix/wait3.c: Don't treat STAT_LOC as a union, since it's
	not any more.
2016-09-02 16:57:59 -07:00
Roland McGrath
307c2c2dff NaCl: Fix compile error in clock function.
* sysdeps/nacl/clock.c (clock): nacl_abi_clock_t -> nacl_irt_clock_t
2016-09-02 16:56:35 -07:00
Siddhesh Poyarekar
54c86ccab6 Inline all support functions for sin and cos
The support functions for sin and cos have a lot of identical
functionality, so inlining them gives a pretty decent jump in
functionality: ~19% in the sincos function.  On SPEC2006 this
translates to about 2.1% in the tonto test.

	* sysdeps/ieee754/dbl-64/s_sin.c (do_cos): Mark as inline.
	(do_cos_slow): Likewise.
	(do_sin): Likewise.
	(do_sin_slow): Likewise.
	(slow): Likewise.
	(slow1): Likewise.
	(slow2): Likewise.
	(sloww): Likewise.
	(sloww1): Likewise.
	(sloww2): Likewise.
	(bsloww): Likewise.
	(bsloww1): Likewise.
	(bsloww2): Likewise.
	(cslow2): Likewise.
2016-09-02 20:08:41 +05:30
Siddhesh Poyarekar
25e440c6c7 Use do_sin for sin(x) where 0.25 < |x| < 0.855469
The only code looks slightly different from do_sin but on closer
examination, should give exactly the same result.  Drop it in favour
of the do_sin function call.

	* sysdeps/ieee754/dbl-64/s_sin.c (__sin): Use do_sin.
2016-09-02 20:08:41 +05:30
Siddhesh Poyarekar
758e79ec89 Consolidate input partitioning into do_cos and do_sin
All calls to do_cos are preceded by code that partitions x into a
larger double that gives an offset into the sincos table and a smaller
double that is used in a polynomial computation.  Consolidate all of
them into do_cos and do_sin to reduce code duplication.

	* sysdeps/ieee754/dbl-64/s_sin.c (do_cos): Accept X and DX as input
	arguments.  Consolidate input partitioning from callers here.
	(do_cos_slow): Likewise.
	(do_sin): Likewise.
	(do_sin_slow): Likewise.
	(do_sincos_1): Remove the no longer necessary input partitioning.
	(do_sincos_2): Likewise.
	(__sin): Likewise.
	(__cos): Likewise.
	(slow1): Likewise.
	(slow2): Likewise.
	(sloww1): Likewise.
	(sloww2): Likewise.
	(bsloww1): Likewise.
	(bsloww2): Likewise.
	(cslow2): Likewise.
2016-09-02 20:08:41 +05:30
Paul E. Murphy
2bad840e9d Remove unneeded stubs for k_rem_pio2l.
This is only used for the float and double variants.

Instead, just add it to the type specific list of files,
and remove all stubs, and remove the declaration from
math_private.h.

I verified x86_64, i486, ia64, m68k, and ppc64 build.
2016-09-01 09:31:06 -05:00
Paul E. Murphy
f306ea1ada Make common fmin implementation generic. 2016-09-01 09:31:05 -05:00
Paul E. Murphy
847c9161c7 Make common fmax implementation generic.
Also update aarch64 to ensure the correct s_fmin.c is included.
The include order favors including the generated copy.
2016-09-01 09:31:05 -05:00
Paul E. Murphy
ee8a49071c Make common nextdown implementation generic.
With the exception of those machines using the ldbl-opt in
an Implies file, this is a trivial transformation.

nextdownl is not subject to the non-trivial versioning rules
of the other generated functions, so to keep things simple,
it is handled as a one-off case in ldbl-opt to preserve the
existing behavior.
2016-09-01 09:31:03 -05:00
Paul E. Murphy
7b7c39450b Make common fdim implementation generic.
The only difference is the usage of math_narrow_eval when
building s_fdiml.c.  This should be harmless for long double,
but I did observe some code generation changes on m68k, but
lack the resources to test it.

Likewise, to more easily support overriding symbol generation,
the aliasing macros are always conditionally defined on their
absence to reduce boilerplate.

I also ran builds for i486, ppc64, sparcv9, aarch64,
s390x and observed no changes to s_fdim* objects.
2016-09-01 09:28:05 -05:00
Florian Weimer
4d728087ef Base <sys/quota.h> on Linux kernel headers [BZ #20525]
Macros which are also defined in <linux/quota.h> are removed, and
<linux/quota.h> is included instead.

This commit cleans up the definition of fs_to_dq_blocks and struct
dqblock and struct dqinfo, too.
2016-09-01 15:53:13 +02:00
Paul E. Murphy
de6b6d14e9 ldbl-128: Cleanup e_gammal_r.c after _Float128 rename 2016-08-31 17:17:03 -05:00
Paul E. Murphy
15089e046b ldbl-128: Rename 'long double' to '_Float128'
Add a layer of macro indirection for long double files
which need to be built using another typename.  Likewise,
add the L(num) macro used in a later patch to override
real constants.

These macros are only defined through the ldbl-128
math_ldbl.h header, thereby implicitly restricting
these macros to machines which back long double
with an IEEE binary128 format.

Likewise, appropriate changes are made for the few
files which indirectly include such ldbl-128 files.

These changes produce identical binaries for s390x,
aarch64, and ppc64.
2016-08-31 10:38:11 -05:00
Stefan Liebler
e9b424881a S390: Do not set FE_INEXACT with feraiseexcept (FE_OWERFLOW|FE_UNDERFLOW).
On s390 feraiseexcept (FE_OVERFLOW|FE_UNDERFLOW) sets FE_INEXACT, too.
This patch uses z196 zarch load rounded instruction which can suppress
FE_INEXACT exception if gcc has z196 support in used configuration.
Otherwise FE_INEXACT flag is set as before. The gcc support is tested
in a new configure-check.

A comment in fsetexcptflg.c is corrected as new exceptions are not
executed with the next floating-point instruction if fpc is set with
_FPU_SETCW macro. It seems the comment was copied e.g. from
sysdeps/x86_64/fpu/fsetexcptflg.c file.

ChangeLog:

	* config.h.in (HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT):
	New undefine.
	* sysdeps/s390/configure.ac: Add test for z196 zarch support.
	* sysdeps/s390/configure: Regenerated.
	* sysdeps/s390/fpu/fraiseexcpt.c (__feraiseexcept): Use ledbra
	instruction for raising over-/underflow if z196 zarch is supported
	by default.
	* sysdeps/s390/fpu/fsetexcptflg.c (fesetexceptflag):
	Correct comment.
2016-08-31 14:54:55 +02:00
Svante Signell
aaf3045480 hurd: Fix adjtime call with OLDDELTA == NULL
* sysdeps/mach/hurd/adjtime.c (__adjtime): When OLDDELTA is NULL, make
it point to a dumb buffer for RPC to fill it.
2016-08-30 23:07:30 +02:00
Siddhesh Poyarekar
9d84d0e51d Use fabs(x) instead of branching on signedness of input to sin and cos
The sin and cos code is inconsistent about its use of fabs to get the
absolute value of X where in some places it conditionalizes the code
while in others it uses fabs.  fabs seems to be a better candidate in
most cases because it avoids a branch.  Similarly there is an attempt
to make it easier for the compiler to emit conditional assignment
instructions (like fcsel on aarch64) where it can, by isolating
conditional assignment constructs from the rest of the expression.

A further benefit of this change is to identify common constructs
across functions and consolidate them in future patches.

	* sysdeps/ieee754/dbl-64/s_sin.c (do_cos_slow): Use ternary
	instead of if/else.
	(do_sin_slow): Likewise.
	(do_sincos_1): Use fabs instead of if/else.
	(do_sincos_2): Likewise.
	(__sin): Likewise.
	(__cos): Likewise.
	(slow2): Likewise.
	(sloww): Likewise.
	(sloww1): Likewise.  Drop argument M.
	(sloww2): Use fabs instead of if/else.
	(bsloww): Likewise.
	(bsloww1): Likewise.
	(bsloww2): Likewise.
2016-08-30 13:01:59 +05:30
Siddhesh Poyarekar
1a822c6184 Add fall through comments
Add fall through comments I had missed writing in previously.
2016-08-30 13:00:29 +05:30
Siddhesh Poyarekar
32efd690bd Consolidate reduce_and_compute code
This patch reshuffles the reduce_and_compute code so that the
structure matches other code structures of the same type elsewhere in
s_sin.c and s_sincos.c.  This is the beginning of an attempt to
consolidate and reduce code duplication in functions in s_sin.c to
make it easier to read and possibly also easier for the compiler to
optimize.

	* sysdeps/ieee754/dbl-64/s_sin.c (reduce_and_compute):
	Consolidate switch cases 0 and 2.
2016-08-30 12:51:39 +05:30
Paul E. Murphy
feb62ddacb Convert remaining complex function to generated files
Convert cpow, clog, clog10, cexp, csqrt, and cproj functions
into generated templates.  Note, ldbl-opt still retains
s_clog10l.c as the aliasing rules are non-trivial.
2016-08-29 12:43:38 -05:00
Paul E. Murphy
d47d27d6c0 sparcv9: Restore fdiml@GLIBC_2.1
Use s_fdim.c from sysdeps/ieee754/ldbl-opt/ instead of
math/ to ensure a compat symbol for fdiml is created.
2016-08-29 11:54:45 -05:00
Joseph Myers
780257d48d Add fetestexceptflag.
TS 18661-1 defines an fetestexceptflag function to test the exception
state saved in an fexcept_t object by fegetexceptflag.

This patch implements this function for glibc.  Almost all
architectures save exception state in such a way that it can be
directly ANDed with exception flag bits, so rather than having lots of
fetestexceptflag implementations that all do the same thing, the math/
implementation is made to use this generic logic (which is also OK in
the fallback case where FE_ALL_EXCEPT is zero).  The only architecture
that seems to need anything different is s390.

(fegetexceptflag and fesetexceptflag use abbreviated filenames
fgetexcptflg.c and fsetexcptflg.c.  Because we are no longer concerned
by 14-character filename limits, fetestexceptflag uses the obvious
filename fetestexceptflag.c.)

The NEWS entry is intended to be expanded along the lines given in
<https://sourceware.org/ml/libc-alpha/2016-08/msg00356.html> when
fegetmode and fesetmode are added.

Tested for x86_64, x86, mips64 and powerpc.

	* math/fetestexceptflag.c: New file.
	* sysdeps/s390/fpu/fetestexceptflag.c: Likewise.  Comment by
	Stefan Liebler.
	* math/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(fetestexceptflag): New function declaration.
	* manual/arith.texi (fetestexceptflag): Document function.
	* math/Versions (fetestexceptflag): New libm symbol at version
	GLIBC_2.25.
	* math/Makefile (libm-support): Add fetestexceptflag.
	(tests): Add test-fetestexceptflag.
	* math/test-fetestexceptflag.c: New file.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-08-29 11:47:21 +00:00
Florian Weimer
ef4f97648d malloc: Simplify static malloc interposition [BZ #20432]
Existing interposed mallocs do not define the glibc-internal
fork callbacks (and they should not), so statically interposed
mallocs lead to link failures because the strong reference from
fork pulls in glibc's malloc, resulting in multiple definitions
of malloc-related symbols.
2016-08-26 23:20:41 +02:00
H.J. Lu
0ac8ee53e8 X86-64: Correct CFA in _dl_runtime_resolve
When stack is re-aligned in _dl_runtime_resolve, there is no need to
adjust CFA when allocating register save area on stack.

	* sysdeps/x86_64/dl-trampoline.h (_dl_runtime_resolve): Don't
	adjust CFA when allocating register save area on re-aligned
	stack.
2016-08-26 08:57:54 -07:00
Paul E. Murphy
d5602cebf1 Convert _Complex tangent functions to generated code
This converts s_c{,a}tan{,h}{f,,l} into a single
templated file c{,a}tan{,h}_template.c with the
exception of alpha.
2016-08-19 16:47:31 -05:00
Paul E. Murphy
c50eee19c4 Convert _Complex sine functions to generated code
Refactor s_c{,a}sin{,h}{f,,l} into a single templated
macro.
2016-08-19 16:46:41 -05:00
H.J. Lu
a6f20b6763 X86: Change bit_YMM_state to (1 << 2)
All other state bits, except for bit_YMM_state, are defined as (1 << N).
This patch changes bit_YMM_state from (2 << 1) to (1 << 2).

	* sysdeps/x86/cpu-features.h (bit_YMM_state): Set to (1 << 2).
2016-08-19 13:32:34 -07:00
Paul E. Murphy
4482ff226e Merge common usage of mul_split function
A number of files share identical code for the
mul_split function.

This moves the duplicated function mul_split into its
own header, and refactors the fma usage into a single
selection macro.  Likewise, mul_split when used by a
long double implementation is renamed mul_splitl for
clarity.
2016-08-19 11:29:43 -05:00
Paul E. Murphy
01ee387015 Convert _Complex cosine functions to generated code
This is fairly straight fowards.  m68k overrides are
updated to use the framework, and thus are simplified
a bit.
2016-08-19 11:28:55 -05:00
Torvald Riegel
6f9d4f595e Fix incorrect double-checked locking related to _res_hconf.initialized.
_res_hconf.initialized was not suitable for use in a multi-threaded
environment due to the lack of atomics and memory barriers.  Use of it was
also unnecessary because _res_hconf_init did the right thing by using
__libc_once.  This patch fixes the glibc-internal uses by just calling
_res_hconf_init unconditionally, and switches to a release MO atomic store
for _res_hconf.initialized to fix the glibc side of the synchronization
problem (which will maintain backward compatibility, but cannot fix the
lack of acquire MO on any glibc-external loads).

	[BZ #20477]
	* resolv/res_hconf.c (do_init): Use atomic access.
	* resolv/res_hconf.h: Add comments.
	* nscd/aicache.c (addhstaiX): Call _res_hconf_init unconditionally.
	* nss/getXXbyYY_r.c (REENTRANT_NAME): Likewise.
	* sysdeps/posix/getaddrinfo.c (gaih_inet): Likewise.
2016-08-18 20:53:37 +02:00
Stefan Liebler
b65f0b7b2e Get rid of array-bounds warning in __kernel_rem_pio2[f] with gcc 6.1 -O3.
On s390x I get the following werror when build with gcc 6.1 (or current gcc head) and -O3:
../sysdeps/ieee754/dbl-64/k_rem_pio2.c: In function ‘__kernel_rem_pio2’:
../sysdeps/ieee754/dbl-64/k_rem_pio2.c:254:18: error: array subscript is below array bounds [-Werror=array-bounds]
    for (k = 1; iq[jk - k] == 0; k++)
                ~~^~~~~~~~
I get the same error with sysdeps/ieee754/flt-32/k_rem_pio2f.c.

This patch adds DIAG_* macros around it.

ChangeLog:

	* sysdeps/ieee754/dbl-64/k_rem_pio2.c (__kernel_rem_pio2):
	Use DIAG_*_NEEDS_COMMENT macro to get rid of array-bounds warning.
	* sysdeps/ieee754/flt-32/k_rem_pio2f.c (__kernel_rem_pio2f):
	Likewise.
2016-08-18 12:20:35 +02:00
Paul E. Murphy
ee19f1de0d ldbl-128: Remove unused sqrtl declaration in e_asinl.c
This did not alter compilation for s390x and aarch64
targets.
2016-08-17 14:06:54 -05:00
Paul E. Murphy
ce6698ea0a Support for type-generic libm function implementations libm
This defines a new classes of libm objects.  The
<func>_template.c file which is used in conjunction
with the new makefile hooks to derive variants for
each type supported by the target machine.

The headers math-type-macros-TYPE.h are used to supply
macros to a common implementation of a function in
a file named FUNC_template.c and glued togethor via
a generated file matching existing naming in the
build directory.

This has the properties of preserving the existing
override mechanism and not requiring any arcane
build system twiddling.  Likewise, it enables machines
to override these files without any additional work.

I have verified the built objects for ppc64, x86_64,
alpha, arm, and m68k do not change in any meaningful
way with these changes using the Fedora cross toolchains.
I have verified the x86_64 and ppc64 changes still run.
2016-08-17 14:06:03 -05:00
Florian Weimer
d9067fca40 Do not override objects in libc.a in other static libraries [BZ #20452]
With this change, we no longer add sysdep.o and similar objects which
are present in libc.a to other static libraries.
2016-08-17 14:57:01 +02:00
Joseph Myers
8b7d13322a Add fesetexcept: sparc.
This patch adds a SPARC version of fesetexcept.  Untested.

	* sysdeps/sparc/fpu/fesetexcept.c: New file.
2016-08-16 16:25:57 +00:00
Joseph Myers
3292b26b54 Add fesetexcept: sh.
This patch adds an SH version of fesetexcept.  Untested.

	* sysdeps/sh/sh4/fpu/fesetexcept.c: New file.
2016-08-16 16:25:10 +00:00
Joseph Myers
6b1c3e3654 Add fesetexcept: s390.
This patch adds an S/390 version of fesetexcept.  Tested and corrected
by Stefan Liebler.

	* sysdeps/s390/fpu/fesetexcept.c: New file.
2016-08-16 16:24:11 +00:00
Joseph Myers
b22be8c368 Add fesetexcept: powerpc.
This patch adds PowerPC versions of fesetexcept.

	* sysdeps/powerpc/fpu/fesetexcept.c: New file.
	* sysdeps/powerpc/nofpu/fesetexcept.c: Likewise.
	* sysdeps/powerpc/powerpc32/e500/nofpu/fesetexcept.c: Likewise.
2016-08-16 16:22:12 +00:00
Joseph Myers
760c61e944 Add fesetexcept: mips.
This patch adds a MIPS version of fesetexcept.

	* sysdeps/mips/fpu/fesetexcept.c: New file.
2016-08-16 16:21:21 +00:00
Joseph Myers
0ca2c77052 Add fesetexcept: m68k.
This patch adds an M68K version of fesetexcept.  Untested.

	* sysdeps/m68k/fpu/fesetexcept.c: New file.
2016-08-16 16:20:33 +00:00
Joseph Myers
272ea61207 Add fesetexcept: ia64.
This patch adds an IA64 version of fesetexcept.  Untested.

	* sysdeps/ia64/fpu/fesetexcept.c: New file.
2016-08-16 16:19:55 +00:00
Joseph Myers
e03d01b9f2 Add fesetexcept: hppa.
This patch adds an HPPA version of fesetexcept.  Untested.

	* sysdeps/hppa/fpu/fesetexcept.c: New file.
2016-08-16 16:19:03 +00:00
Joseph Myers
969b3a56e9 Add fesetexcept: arm.
This patch adds an ARM version of fesetexcept.

	* sysdeps/arm/fesetexcept.c: New file.
2016-08-16 16:18:24 +00:00
Joseph Myers
56acef0ebb Add fesetexcept: alpha.
This patch adds an Alpha version of fesetexcept.  Untested.

	* sysdeps/alpha/fpu/fesetexcept.c: New file.
2016-08-16 16:17:42 +00:00
Joseph Myers
ce99c0816b Add fesetexcept: aarch64.
This patch adds an AArch64 version of fesetexcept.  Untested.

	* sysdeps/aarch64/fpu/fesetexcept.c: New file.
2016-08-16 16:16:57 +00:00
Joseph Myers
5146356f5a Add fesetexcept.
TS 18661-1 defines an fesetexcept function for setting floating-point
exception flags without the side-effect of causing enabled traps to be
taken.

This patch series implements this function for glibc.  The present
patch adds the fallback stub implementation, x86 and x86_64
implementations, documentation, tests and ABI baseline updates.  The
remaining patches, some of them untested, add implementations for
other architectures.  The implementations generally follow those of
the fesetexceptflag function.

As for fesetexceptflag, the approach taken for architectures where
setting flags causes enabled traps to be taken is to set the flags
(and potentially cause traps) rather than refusing to set the flags
and returning an error.  Since ISO C and TS 18661 provide no way to
enable traps, this is formally in accordance with the standards.

The NEWS entry should be considered a placeholder, since this patch
series is intended to be followed by further such series adding other
TS 18661-1 features, so that the NEWS entry would end up looking more
like

* New <fenv.h> features from TS 18661-1:2014 are added to libm: the
  fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
  the femode_t type and the FE_DFL_MODE macro.

with hopefully more such entries for other features, rather than
having an entry for a single function in the end.

I believe we have consensus for adding TS 18661-1 interfaces as per
<https://sourceware.org/ml/libc-alpha/2016-06/msg00421.html>.

Tested for x86_64, x86, mips64 (hard float, and soft float to test the
fallback version), arm (hard float) and powerpc (hard float, soft
float and e500).

	* math/fesetexcept.c: New file.
	* sysdeps/i386/fpu/fesetexcept.c: Likewise.
	* sysdeps/x86_64/fpu/fesetexcept.c: Likewise.
	* math/fenv.h: Define
	__GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include
	<bits/libc-header-start.h> instead of including <features.h>.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (fesetexcept): New function
	declaration.
	* manual/arith.texi (fesetexcept): Document function.
	* math/Versions (fesetexcept): New libm symbol at version
	GLIBC_2.25.
	* math/Makefile (libm-support): Add fesetexcept.
	(tests): Add test-fesetexcept and test-fesetexcept-traps.
	* math/test-fesetexcept.c: New file.
	* math/test-fesetexcept-traps.c: Likewise.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-08-16 16:16:10 +00:00
Andreas Schwab
9e2ff6c9cc arm: mark __startcontext as .cantunwind (bug 20435)
__startcontext marks the bottom of the call stack of the contexts created
by makecontext.
2016-08-15 17:10:21 +02:00
Joseph Myers
3f0eedddbe Add comment from sysdeps/powerpc/fpu/fraiseexcpt.c to fsetexcptflg.c.
* sysdeps/powerpc/fpu/fsetexcptflg.c (__fesetexceptflag): Add
	comment from fraiseexcpt.c.
2016-08-12 17:49:07 +00:00
Joseph Myers
f792117921 Fix powerpc fesetexceptflag clearing FE_INVALID (bug 20455).
As shown by the test math/test-fexcept, the powerpc fesetexceptflag
implementation fails to clear a previously set FE_INVALID flag, when
that flag is clear in the saved exceptions and FE_INVALID is included
in the mask of flags to restore, because it fails to mask out the
sub-exceptions of FE_INVALID from the FPSCR state.  This patch fixes
the masking logic accordingly.

Tested for powerpc.

	[BZ #20455]
	* sysdeps/powerpc/fpu/fsetexcptflg.c (__fesetexceptflag): Mask out
	all FE_INVALID sub-exceptions from FPSCR when FE_INVALID specified
	to be restored.
2016-08-10 21:47:35 +00:00
Joseph Myers
5220a1aa8d Add tests for fegetexceptflag, fesetexceptflag.
I noticed that there was no meaningful test coverage for
fegetexceptflag and fesetexceptflag (one test ensures that calls to
them compile and link, but nothing to verify they work correctly).
This patch adds tests for these functions.

fesetexceptflag is meant to set the relevant exception flag bits to
the saved state without causing enabled traps to be taken.  On some
architectures, it is not possible to set exception flag bits without
causing enabled traps to occur.  Such architectures need to define
EXCEPTION_SET_FORCES_TRAP to 1 in their math-tests.h, as is done in
this patch for powerpc.  x86 avoids needing to define this because the
traps resulting from setting exception bits don't occur until the next
floating-point operation or fwait instruction.

Tested for x86_64, x86 and powerpc.  Note that test-fexcept fails for
powerpc because of a pre-existing bug in fesetexceptflag for powerpc,
which I'll fix separately.

	* math/test-fexcept-traps.c: New file.
	* math/test-fexcept.c: Likewise.
	* math/Makefile (tests): Add test-fexcept and test-fexcept-traps.
	* sysdeps/generic/math-tests.h (EXCEPTION_SET_FORCES_TRAP): New
	macro.
	* sysdeps/powerpc/math-tests.h [!__NO_FPRS__]
	(EXCEPTION_SET_FORCES_TRAP): Likewise.
2016-08-10 21:01:08 +00:00
Samuel Thibault
a194625ef3 Fix recvmsg returning SIGLOST on PF_LOCAL sockets
when msg_name is not NULL.

	* sysdeps/mach/hurd/recvmsg.c (__libc_recvmsg): Cope with aport being
	MACH_PORT_NULL.
2016-08-09 01:42:50 +02:00
Aurelien Jarno
bf79a337ec sparc32/sparcv9: add a VIS3 version of fdim
sparc32 passes floating point values in the integer registers. VIS3
instructions gives access to the movwtos instruction to directly
transfer a value from an integer register to a floating point register.
Therefore it makes sense to provide a VIS3 version consisting in the
generic version compiled with -mvis3.

Changelog:
	* math/s_fdim.c: Avoid alias renamed.
	* math/s_fdimf.c: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
	[$(subdir) = math && $(have-as-vis3) = yes] (libm-sysdep_routines):
	Add s_fdimf-vis3, s_fdim-vis3.
	(CFLAGS-s_fdimf-vis3.c): New. Set to -Wa,-Av9d -mvis3.
	(CFLAGS-s_fdim-vis3.c): Likewise.
	sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-vis3.c: New file.
	sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.c: Likewise.
2016-08-05 22:35:01 +02:00
Aurelien Jarno
8a9f4eb958 sparc: remove fdim sparc specific implementations
The fdim and fdimf functions on sparc do not fully follow the standard
and do not set errno to ERANGE when the result overflows. Since glibc
2.24 this causes the two following tests to fail:

  Failure: fdim (max_value, -max_value): errno set to 0, expected 34 (ERANGE)
  Failure: fdim_upward (max_value, -max_value): errno set to 0, expected 34 (ERANGE)

It happens that using GCC with the generic C code generates very similar
code to the sparc specific implementations. Therefore this patches
remove them. Note it might still worth adding a vis3 specific version of
fdim on sparc32/sparcv9, this is done in a following patch to ease
backporting.

Changelog:
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
	[$(subdir) = math && $(have-as-vis3) = yes] (libm-sysdep_routines):
	Remove s_fdimf-vis3, s_fdim-vis3.
	* sysdeps/sparc/sparc32/fpu/s_fdim.S: Delete file.
	* sysdeps/sparc/sparc32/fpu/s_fdimf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_fdim.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_fdimf.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_fdim.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_fdimf.S: Likewise.
2016-08-05 22:35:01 +02:00
Aurelien Jarno
9c8addbc1c sparc: build with -mvis on sparc32/sparcv9 and sparc64
When building for sparc32/sparcv9 or sparc64, we assume that VIS
instructions are available and use them in the sparc specific assembly
code. However we do not tell GCC to use such instructions, resulting in
slightly suboptimal code.

Fix that by passing -Wa,-Av9a -mvis to GCC.

Changelog:
	* sysdeps/sparc/sparc32/sparcv9/Makefile (sysdep-CFLAGS): Add -mvis.
	* sysdeps/sparc/sparc64/Makefile (sysdep-CFLAGS): New. Define to
	-Wa,-Av9a -mvis.
2016-08-05 22:35:01 +02:00
Florian Weimer
e67330ab57 x86: Use sysdep.o from libc.a in static libraries
Static libraries can use the sysdep.o copy in libc.a without
a performance penalty.  This results in a visible difference
if libpthread.a is relinked into a single object file (which
is needed to support libraries which check for the presence
of certain symbols to enable threading support, which generally
fails with static linking unless libpthread.a is relinked).
2016-08-04 11:10:57 +02:00
Zack Weinberg
63eb8df85a Minimize sysdeps code involved in defining major/minor/makedev.
Presently sys/sysmacros.h is entirely defined in sysdeps.  This would
mean that the deprecation logic coming up in the next patch would have
to be written twice (in generic/ and unix/sysv/linux/).  To avoid that,
hoist all but the unavoidably system-dependent logic to misc/, leaving a
bits/ header behind.  This also promotes the Linux-specific encoding of
dev_t, which accommodates 32-bit major and minor numbers in a 64-bit dev_t,
to generic, as glibc's dev_t is always 64 bits wide.

The former Linux implementation used inline functions to avoid evaluating
arguments more than once.  After this change, all platforms use inline
functions, which means that three new symbols are added to the generic ABI.
(These symbols are in the user namespace, which is how they have always
been on Linux.  They begin with "gnu_dev_", so collisions with user code
are pretty unlikely.)

New ports henceforth need only provide a bits/sysmacros.h defining
internal macros __SYSMACROS_{DECLARE,DEFINE}_{MAJOR,MINOR,MAKEDEV}.
This is only necessary if the kernel encoding is incompatible with
the now-generic encoding (for instance, it would be necessary for
FreeBSD).

While I was at it, I added a basic round-trip test for these functions.

	* sysdeps/generic/sys/sysmacros.h: Delete file.
	* sysdeps/unix/sysv/linux/makedev.c: Delete file.
	* sysdeps/unix/sysv/linux/sys/sysmacros.h: Move file ...
	* bits/sysmacros.h: ... here; this encoding is now the generic
	encoding.  Now defines only the following macros:
	__SYSMACROS_DECLARE_MAJOR, __SYSMACROS_DEFINE_MAJOR,
	__SYSMACROS_DECLARE_MINOR, __SYSMACROS_DEFINE_MINOR,
	__SYSMACROS_DECLARE_MAKEDEV, __SYSMACROS_DEFINE_MAKEDEV.

	* misc/sys/sysmacros.h, misc/makedev.c: New files that use
	bits/sysmacros.h and the above new macros to generate the
	public implementations of major, minor, and makedev.
	* misc/tst-makedev.c: New test.
	* include/sys/sysmacros.h: New wrapper.

	* misc/Makefile (headers): Add sys/sysmacros.h, bits/sysmacros.h.
	(routines): Add makedev.
	(tests): Add tst-makedev.
	* misc/Versions [GLIBC_2.25]: Add gnu_dev_major, gnu_dev_minor,
	gnu_dev_makedev.
	* posix/Makefile (headers): Remove sys/sysmacros.h.
	* sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Remove makedev.

	* sysdeps/arm/nacl/libc.abilist: Add GLIBC_2.25,
	gnu_dev_major, gnu_dev_makedev, gnu_dev_minor.
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist
	* sysdeps/unix/sysv/linux/alpha/libc.abilist
	* sysdeps/unix/sysv/linux/arm/libc.abilist
	* sysdeps/unix/sysv/linux/hppa/libc.abilist
	* sysdeps/unix/sysv/linux/i386/libc.abilist
	* sysdeps/unix/sysv/linux/ia64/libc.abilist
	* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
	* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
	* sysdeps/unix/sysv/linux/microblaze/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
	* sysdeps/unix/sysv/linux/nios2/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
	* sysdeps/unix/sysv/linux/sh/libc.abilist
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist:
	Add GLIBC_2.25.
2016-08-03 15:23:04 -04:00
Paul E. Murphy
cad1d6066f Remove tacit double usage in ldbl-128
There is quiet truncation to double arithmetic in several
files.  I noticed them when building ldbl-128 in a
soft-fp context.  This did not change any test results.
2016-08-03 11:01:25 -05:00
Florian Weimer
a2ff21f825 elf: Avoid using memalign for TLS allocations [BZ #17730]
Instead of a flag which indicates the pointer can be freed, dtv_t
now includes the pointer which should be freed.  Due to padding,
the size of dtv_t does not increase.

To avoid using memalign, the new allocate_dtv_entry function
allocates a sufficiently large buffer so that a sub-buffer
can be found in it which starts with an aligned pointer.  Both
the aligned and original pointers are kept, the latter for calling
free later.
2016-08-03 16:15:38 +02:00
Joseph Myers
e7516580ec Define UDP_ENCAP_* from Linux 4.7 in netinet/udp.h.
This patch adds the new UDP_ENCAP_GTP0 and UDP_ENCAP_GTP1U from Linux
4.7 to sysdeps/gnu/netinet/udp.h.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).

	* sysdeps/gnu/netinet/udp.h (UDP_ENCAP_GTP0): New macro.
	(UDP_ENCAP_GTP1U): Likewise.
2016-08-03 12:13:16 +00:00
Joseph Myers
acaff9b658 Define PF_QIPCRTR, AF_QIPCRTR from Linux 4.7 in bits/socket.h.
This patch adds the new PF_QIPCRTR and AF_QIPCRTR from Linux 4.7 to
sysdeps/unix/sysv/linux/bits/socket.h.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).

	* sysdeps/unix/sysv/linux/bits/socket.h (PF_QIPCRTR): New macro.
	(PF_MAX): Update value.
	(AF_QIPCRTR): New macro.
2016-08-03 12:12:22 +00:00
Aurelien Jarno
bdf20beac1 sparc64: add a VIS3 version of ceil, floor and trunc
sparc64 passes floating point values in the floating point registers.
As the the generic ceil, floor and trunc functions use integer
instructions, it makes sense to provide a VIS3 version consisting in
the the generic version compiled with -mvis3. GCC will then use
movdtox, movxtod, movwtos and movstow instructions.

sparc32 passes the floating point values in the integer registers, so it
doesn't make sense to do the same.

Changelog:
	* sysdeps/ieee754/dbl-64/s_trunc.c: Avoid alias renamed.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c: Likewise.
	* sysdeps/ieee754/flt-32/s_truncf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/Makefile
	[$(subdir) = math && $(have-as-vis3) = yes] (libm-sysdep_routines):
	Add s_ceilf-vis3, s_ceil-vis3, s_floorf-vis3, s_floor-vis3,
	s_truncf-vis3, s_trunc-vis3.
	(CFLAGS-s_ceilf-vis3.c): New. Set to -Wa,-Av9d -mvis3.
	(CFLAGS-s_ceil-vis3.c): Likewise.
	(CFLAGS-s_floorf-vis3.c): Likewise.
	(CFLAGS-s_floor-vis3.c): Likewise.
	(CFLAGS-s_truncf-vis3.c): Likewise.
	(CFLAGS-s_trunc-vis3.c): Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil-vis3.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf-vis3.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor-vis3.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf-vis3.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c: Likewise.
2016-08-03 13:35:22 +02:00
David S. Miller
3ef3f1b93f Fix sNaN handling in nearbyint on 32-bit sparc.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_nearbyint-vis3.S
	(__nearbyint_vis3): Don't check for sNaN before float register is
	loaded with the incoming argument.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_nearbyintf-vis3.S
	(__nearbyintf_vis3): Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_nearbyint.S (__nearbyint):
	Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_nearbyintf.S (__nearbyintf):
	Likewise.
2016-08-02 21:00:21 -07:00
Aurelien Jarno
30f926d3b3 powerpc: fix ifunc-sel.h fix asm constraints and clobber list
As pointer out on the mailing list, the inline assembly code in
sysdeps/powerpc/ifunc-sel.h doesn't have a list of clobbered registers
and used wrong constraints.

This patch fixes that. I verified it doesn't introduce any change in the
generated code.

Changelog:
	* sysdeps/powerpc/ifunc-sel.h (ifunc_sel): Add "11", "12", "cr0" to the
	clobber list. Use "i" constraint instead of "X".
	(ifunc_one): Add "12" to the clobber list. Use "i" constraint instead
	of "X".
2016-08-03 00:22:44 +02:00
Aurelien Jarno
ee71e5b6dd powerpc: fix ifunc-sel.h with GCC 6
On 32-bit PowerPC GCC 6 always saves the PIC register on the stack in
the prologue and adjust the stack in the epilogue. It is therefore not
possible anymore to just exit the function in the inline asm code,
otherwise it corrupts the stack pointer. This causes the following tests
to fail when using GCC 6:

FAIL: elf/ifuncmain1
FAIL: elf/ifuncmain1pic
FAIL: elf/ifuncmain1picstatic
FAIL: elf/ifuncmain1pie
FAIL: elf/ifuncmain1staticpic
FAIL: elf/ifuncmain1staticpie
FAIL: elf/ifuncmain1vis
FAIL: elf/ifuncmain1vispic
FAIL: elf/ifuncmain1vispie
FAIL: elf/ifuncmain2pic
FAIL: elf/ifuncmain2picstatic
FAIL: elf/ifuncmain3
FAIL: elf/ifuncmain4picstatic
FAIL: elf/ifuncmain5
FAIL: elf/ifuncmain5picstatic
FAIL: elf/ifuncmain5staticpic

The solution is to replace the beqlr instructions by a beq to the end
of the inline asm code. This fixes all the above failures.

ChangeLog:
	* sysdeps/powerpc/ifunc-sel.h (ifunc_sel): Replace beqlr instructions
	by beq instructions jumping to the end of the function.
2016-08-03 00:22:44 +02:00
Andrew Senkevich
533f9bebf9 x86_64: Call finite scalar versions in vectorized log, pow, exp (bz #20033).
Vector math functions require -ffast-math which sets -ffinite-math-only,
so it is needed to call finite scalar versions (which are called from
vector functions in some cases).

Since finite version of pow() returns qNaN instead of 1.0 for several
inputs, those inputs are excluded for tests of vector math functions.

    [BZ #20033]
    * sysdeps/x86_64/fpu/multiarch/svml_d_exp2_core_sse4.S: Call
    finite version.
    * sysdeps/x86_64/fpu/multiarch/svml_d_exp4_core_avx2.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_d_exp8_core_avx512.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_d_log2_core_sse4.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_d_log4_core_avx2.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_d_log8_core_avx512.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_d_pow2_core_sse4.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_d_pow4_core_avx2.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_d_pow8_core_avx512.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_s_expf16_core_avx512.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_s_expf4_core_sse4.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_s_expf8_core_avx2.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_s_logf16_core_avx512.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_s_logf4_core_sse4.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_s_logf8_core_avx2.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_s_powf16_core_avx512.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_s_powf4_core_sse4.S: Likewise.
    * sysdeps/x86_64/fpu/multiarch/svml_s_powf8_core_avx2.S: Likewise.
    * sysdeps/x86_64/fpu/svml_d_exp2_core.S: Likewise.
    * sysdeps/x86_64/fpu/svml_d_log2_core.S: Likewise.
    * sysdeps/x86_64/fpu/svml_d_pow2_core.S: Likewise.
    * sysdeps/x86_64/fpu/svml_s_expf4_core.S: Likewise.
    * sysdeps/x86_64/fpu/svml_s_logf4_core.S: Likewise.
    * sysdeps/x86_64/fpu/svml_s_powf4_core.S: Likewise.
    * math/libm-test.inc (pow_test_data): Exclude tests for qNaN
    in power zero.
2016-08-02 16:35:25 +03:00
Aurelien Jarno
b74d259fe7 alpha: fix trunc for big input values
The alpha specific version of trunc and truncf always add and subtract
0x1.0p23 or 0x1.0p52 even for big values. This causes this kind of
errors in the testsuite:

  Failure: Test: trunc_towardzero (0x1p107)
  Result:
   is:          1.6225927682921334e+32   0x1.fffffffffffffp+106
   should be:   1.6225927682921336e+32   0x1.0000000000000p+107
   difference:  1.8014398509481984e+16   0x1.0000000000000p+54
   ulp       :  0.5000
   max.ulp   :  0.0000

Change this by returning the input value when its absolute value is
greater than 0x1.0p23 or 0x1.0p52. NaN have to go through the add and
subtract operations to get possibly silenced.

Finally remove the code to handle inexact exception, trunc should never
generate such an exception.

Changelog:
	* sysdeps/alpha/fpu/s_trunc.c (__trunc): Return the input value
	when its absolute value is greater than 0x1.0p52.
	[_IEEE_FP_INEXACT] Remove.
	* sysdeps/alpha/fpu/s_truncf.c (__truncf): Return the input value
	when its absolute value is greater than 0x1.0p23.
	[_IEEE_FP_INEXACT] Remove.
2016-08-02 09:18:59 +02:00
Aurelien Jarno
cb7f9d63b9 alpha: fix rint on sNaN input
The alpha version of rint wrongly return sNaN for sNaN input. Fix that
by checking for NaN and by returning the input value added with itself
in that case.

Changelog:
	* sysdeps/alpha/fpu/s_rint.c (__rint): Add argument with itself
	when it is a NaN.
	* sysdeps/alpha/fpu/s_rintf.c (__rintf): Likewise.
2016-08-02 09:18:59 +02:00
Aurelien Jarno
65cc568cf5 alpha: fix floor on sNaN input
The alpha version of floor wrongly return sNaN for sNaN input. Fix that
by checking for NaN and by returning the input value added with itself
in that case.

Finally remove the code to handle inexact exception, floor should never
generate such an exception.

Changelog:
	* sysdeps/alpha/fpu/s_floor.c (__floor): Add argument with itself
	when it is a NaN.
	[_IEEE_FP_INEXACT] Remove.
	* sysdeps/alpha/fpu/s_floorf.c (__floorf): Likewise.
2016-08-02 09:18:59 +02:00
Aurelien Jarno
062e53c195 alpha: fix ceil on sNaN input
The alpha version of ceil wrongly return sNaN for sNaN input. Fix that
by checking for NaN and by returning the input value added with itself
in that case.

Finally remove the code to handle inexact exception, ceil should never
generate such an exception.

Changelog:
	* sysdeps/alpha/fpu/s_ceil.c (__ceil): Add argument with itself
	when it is a NaN.
	[_IEEE_FP_INEXACT] Remove.
	* sysdeps/alpha/fpu/s_ceilf.c (__ceilf): Likewise.
2016-08-02 09:18:59 +02:00
Aurelien Jarno
33ae5b17cd sparc: remove ceil, floor, trunc sparc specific implementations
The ceil, floor and trunc functions on sparc do not fully follow the
standard and trigger an inexact exception when presented a value which
is not an integer. Since glibc 2.24 this causes a few tests to fail,
for instance:

  testing double (without inline functions)
  Failure: ceil (lit_pi): Exception "Inexact" set
  Failure: ceil (-lit_pi): Exception "Inexact" set
  Failure: ceil (min_subnorm_value): Exception "Inexact" set
  Failure: ceil (min_value): Exception "Inexact" set
  Failure: ceil (0.1): Exception "Inexact" set
  Failure: ceil (0.25): Exception "Inexact" set
  Failure: ceil (0.625): Exception "Inexact" set
  Failure: ceil (-min_subnorm_value): Exception "Inexact" set
  Failure: ceil (-min_value): Exception "Inexact" set
  Failure: ceil (-0.1): Exception "Inexact" set
  Failure: ceil (-0.25): Exception "Inexact" set
  Failure: ceil (-0.625): Exception "Inexact" set

I tried to fix that by using the same strategy than used on other
architectures, that is by saving the FSR register at the beginning
and restoring it at the end of the function. When doing so I noticed
a comment that this operation might be very costly, so I decided to
do some benchmarks.

The benchmarks below represent the time required to run each of the
function 60 millions of times with different input value. I have done
that in the basic V9 code, the VIS2 code, and using the default C
implementation of the libc, for both sparc32 and sparc64, on a Niagara
T1 based machine and an UltraSparc IIIi. Given I don't have access to a
more recent machine), I haven't been able to test the VIS3 version. Also
it should be noted that it doesn't make sense to do this benchmark for
V8 or earlier as in that case we use the default C implementation. The
results are available in the table below, the "+ fix" version correspond
to the one saving and restoring the FSR.

  Niagara T1 / sparc32
  --------------------
              ceilf    ceil     floorf   floor    truncf   trunc
  V9          19.10    22.48    19.10    22.48    16.59    19.27
  V9 + fix    19.77    23.34    19.77    23.33    17.27    20.12
  VIS2        16.87    19.62    16.87    19.62
  VIS2 + fix  17.55    20.47    17.55    20.47
  C impl      11.39    13.80    11.40    13.80    10.88    10.84

  Niagara T1 / sparc64
  --------------------
              ceilf    ceil     floorf   floor    truncf   trunc
  V9          18.14    22.23    18.14    22.23    15.64    19.02
  V9 + fix    18.82    23.08    18.82    23.08    16.32    19.87
  VIS2        15.92    19.37    15.92    19.37
  VIS2 + fix  16.59    20.22    16.59    20.22
  C impl      11.39    13.60    11.39    15.36    10.88    12.65

  UltraSparc IIIi / sparc32
  -------------------------
              ceilf    ceil     floorf   floor    truncf   trunc
  V9           4.81     7.09     6.61    11.64     4.91     7.05
  V9 + fix     7.20    10.42     7.14    10.54     6.76     9.47
  VIS2         4.81     7.03     4.76     7.13
  VIS2 + fix   6.76     9.51     6.71     9.63
  C impl       3.88     8.62     3.90     9.45     3.57     6.62

  UltraSparc IIIi / sparc64
  -------------------------
              ceilf    ceil     floorf   floor    truncf   trunc
  V9           3.48     4.39     3.48     4.41     3.01     3.85
  V9 + fix     4.76     5.90     4.76     5.90     4.86     6.26
  VIS2         2.95     3.61     2.95     3.61
  VIS2 + fix   4.24     5.37     4.30     7.97
  C impl       3.63     4.89     3.62     6.38     3.33     4.03

The first thing that should be noted is that the C implementation is
always faster on the Niagara T1 based machine. On the UltraSparc IIIi
the float version on sparc32 is also faster.

Coming back about the fix saving and restoring the FSR, it appears
it has a big impact as expected. In that case the C implementation is
always faster than the fixed implementations.

This patch therefore removes the sparc specific implementations in
favor of the generic ones.

Changelog:
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
	[$(subdir) = math] (libm-sysdep_routines): Remove.
	[$(subdir) = math && $(have-as-vis3) = yes] (libm-sysdep_routines):
	Remove s_ceilf-vis3, s_ceil-vis3, s_floorf-vis3, s_floor-vis3,
	s_truncf-vis3, s_trunc-vis3.
	* sysdeps/sparc/sparc64/fpu/multiarch/Makefile: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis2.S: Delete
	file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceil.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis2.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_ceilf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis2.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floor.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis2.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_floorf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf-vis3.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_ceil.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_ceilf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_floor.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_floorf.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_trunc.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_truncf.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil-vis2.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil-vis3.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf-vis2.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf-vis3.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor-vis2.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor-vis3.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf-vis2.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf-vis3.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_ceil.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_ceilf.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_floor.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_floorf.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_trunc.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/s_truncf.S: Likewise.
2016-08-02 02:07:20 +02:00
H.J. Lu
fe0cf86148 Don't compile do_test with -mavx/-mavx/-mavx512
Don't compile do_test with -mavx, -mavx nor -mavx512 since they won't run
on non-AVX machines.

	[BZ #20384]
	* sysdeps/x86_64/fpu/Makefile (extra-test-objs): Add
	test-double-libmvec-sincos-avx-main.o,
	test-double-libmvec-sincos-avx2-main.o,
	test-double-libmvec-sincos-main.o,
	test-float-libmvec-sincosf-avx-main.o,
	test-float-libmvec-sincosf-avx2-main.o and
	test-float-libmvec-sincosf-main.o.
	test-float-libmvec-sincosf-avx512-main.o.
	($(objpfx)test-double-libmvec-sincos): Also link with
	$(objpfx)test-double-libmvec-sincos-main.o.
	($(objpfx)test-double-libmvec-sincos-avx): Also link with
	$(objpfx)test-double-libmvec-sincos-avx-main.o.
	($(objpfx)test-double-libmvec-sincos-avx2): Also link with
	$(objpfx)test-double-libmvec-sincos-avx2-main.o.
	($(objpfx)test-float-libmvec-sincosf): Also link with
	$(objpfx)test-float-libmvec-sincosf-main.o.
	($(objpfx)test-float-libmvec-sincosf-avx): Also link with
	$(objpfx)test-float-libmvec-sincosf-avx2-main.o.
	[$(config-cflags-avx512) == yes] (extra-test-objs): Add
	test-double-libmvec-sincos-avx512-main.o and
	($(objpfx)test-double-libmvec-sincos-avx512): Also link with
	$(objpfx)test-double-libmvec-sincos-avx512-main.o.
	($(objpfx)test-float-libmvec-sincosf-avx512): Also link with
	$(objpfx)test-float-libmvec-sincosf-avx512-main.o.
	(CFLAGS-test-double-libmvec-sincos.c): Removed.
	(CFLAGS-test-float-libmvec-sincosf.c): Likewise.
	(CFLAGS-test-double-libmvec-sincos-main.c): New.
	(CFLAGS-test-double-libmvec-sincos-avx-main.c): Likewise.
	(CFLAGS-test-double-libmvec-sincos-avx2-main.c): Likewise.
	(CFLAGS-test-float-libmvec-sincosf-main.c): Likewise.
	(CFLAGS-test-float-libmvec-sincosf-avx-main.c): Likewise.
	(CFLAGS-test-float-libmvec-sincosf-avx2-main.c): Likewise.
	(CFLAGS-test-float-libmvec-sincosf-avx512-main.c): Likewise.
	(CFLAGS-test-double-libmvec-sincos-avx.c): Set to -DREQUIRE_AVX.
	(CFLAGS-test-float-libmvec-sincosf-avx.c ): Likewise.
	(CFLAGS-test-double-libmvec-sincos-avx2.c): Set to
	-DREQUIRE_AVX2.
	(CFLAGS-test-float-libmvec-sincosf-avx2.c ): Likewise.
	(CFLAGS-test-double-libmvec-sincos-avx512.c): Set to
	-DREQUIRE_AVX512F.
	(CFLAGS-test-float-libmvec-sincosf-avx512.c): Likewise.
	* sysdeps/x86_64/fpu/test-double-libmvec-sincos.c: Rewritten.
	* sysdeps/x86_64/fpu/test-float-libmvec-sincosf.c: Likewise.
	* sysdeps/x86_64/fpu/test-double-libmvec-sincos-avx-main.c: New
	file.
	* sysdeps/x86_64/fpu/test-double-libmvec-sincos-avx2-main.c:
	Likewise.
	* sysdeps/x86_64/fpu/test-double-libmvec-sincos-avx512-main.c:
	Likewise.
	* sysdeps/x86_64/fpu/test-double-libmvec-sincos-main.c:
	Likewise.
	* sysdeps/x86_64/fpu/test-float-libmvec-sincosf-avx-main.c:
	Likewise.
	* sysdeps/x86_64/fpu/test-float-libmvec-sincosf-avx2-main.c:
	Likewise.
	* sysdeps/x86_64/fpu/test-float-libmvec-sincosf-avx512-main.c:
	Likewise.
	* sysdeps/x86_64/fpu/test-float-libmvec-sincosf-main.c:
	Likewise.
2016-07-27 11:53:15 -07:00
Chung-Lin Tang
3eb43b6b0a Nios II localplt.data update: remove __eqsf2 2016-07-27 11:42:13 -07:00
Gustavo Romero
b898b64be7 powerpc: Fix missing verb and typo in comment about AT_HWCAP entry
Fix missing verb and typo in comment about AT_HWCAP entry, in the context
of mcontext_t struct definition for PPC64 Linux kernels.
2016-07-21 14:35:27 -03:00
Szabolcs Nagy
d637e923f9 [AArch64] Update libm-test-ulps
This partly reverts commit f8238ae3c7
that regenerated the ulps, to make the max ulps good for gcc-5,
gcc-6 and gcc-trunk as well.

	* sysdeps/aarch64/libm-test-ulps: Updated.
2016-07-21 09:48:45 +01:00
Stefan Liebler
1f16923552 S390: Do not clobber r13 with memcpy on 31bit with copies >1MB.
If the default memcpy variant is called with a length of >1MB on 31bit,
r13 is clobbered as the algorithm is switching to mvcle. The mvcle code
returns without restoring r13. All other cases are restoring r13.

If memcpy is called from outside libc the ifunc resolver will only select
this variant if running on machines older than z10.
Otherwise or if memcpy is called from inside libc, this default memcpy
variant is called.
The testcase timezone/tst-tzset is triggering this issue in some combinations
of gcc versions and optimization levels.

This bug was introduced in commit 04bb21ac93
and thus is a regression compared to former glibc 2.23 release.

This patch removes the usage of r13 at all. Thus it is not saved and restored.
The base address for execute-instruction is now stored in r5 which is obtained
after r5 is not needed anymore as 256byte block counter.

ChangeLog:

	* sysdeps/s390/s390-32/memcpy.S (memcpy): Eliminate the usage
	of r13 as it is not restored in mvcle case.
2016-07-20 08:29:43 +02:00
Mike Frysinger
4f69cc45bc microblaze: fix variable name collision with syscall macros
If a function passes in a variable named "ret", the code will miscompile
when it declares a local ret variable.  In some cases, it's even a build
failure like so:
../sysdeps/unix/sysv/linux/spawni.c: In function '__spawni_child':
../sysdeps/unix/sysv/linux/spawni.c:289:5: error: address of register variable 'ret' requested
	while (write_not_cancel (p, &ret, sizeof ret) < 0)
2016-07-19 21:42:05 +05:30
H.J. Lu
d957c4d3fa i386: Compile rtld-*.os with -mno-sse -mno-mmx -mfpmath=387
Compile i386 rtld-*.os with -mno-sse -mno-mmx -mfpmath=387 so that no
code in ld.so uses mm/xmm/ymm/zmm registers on i386 since the first 3
mm/xmm/ymm/zmm registers are used to pass vector parameters which must
be preserved.

	* sysdeps/i386/Makefile (rtld-CFLAGS): New.
	[subdir == elf] (CFLAGS-.os): Replace -mno-sse -mno-mmx
	-mfpmath=387 with $(rtld-CFLAGS).
	[subdir != elf] (CFLAGS-.os): Compile rtld-*.os with
	$(rtld-CFLAGS).
2016-07-18 15:16:24 -07:00
Siddhesh Poyarekar
cbf88869ed Fix cos computation for multiple precision fallback (bz #20357)
During the sincos consolidation I made two mistakes, one was a logical
error due to which cos(0x1.8475e5afd4481p+0) returned
sin(0x1.8475e5afd4481p+0) instead.

The second issue was an error in negating inputs for the correct
quadrants for sine.  I could not find a suitable test case for this
despite running a program to search for such an input for a couple of
hours.

Following patch fixes both issues.  Tested on x86_64.  Thanks to Matt
Clay for identifying the issue.

	[BZ #20357]
	* sysdeps/ieee754/dbl-64/s_sin.c (sloww): Fix up condition
	to call __mpsin/__mpcos and to negate values.
	* math/auto-libm-test-in: Add test.
	* math/auto-libm-test-out: Regenerate.
2016-07-18 22:33:09 +05:30
Szabolcs Nagy
f8238ae3c7 [AArch64] Regenerate libm-test-ulps
* sysdeps/aarch64/libm-test-ulps: Regenerated.
2016-07-18 11:42:52 +01:00
Adhemerval Zanella
2ac88eecc5 Refactor Linux raise implementation (BZ#15368)
This patch changes both the nptl and libc Linux raise implementation
to avoid the issues described in BZ#15368.  The strategy used is
summarized in bug report first comment:

 1. Block all signals (including internal NPTL ones);
 2. Get pid and tid directly from syscall (not relying on cached
    values);
 3. Call tgkill;
 4. Restore old signal mask.

Tested on x86_64 and i686.

	[BZ #15368]
	* sysdeps/unix/sysv/linux/nptl-signals.h
	(__nptl_clear_internal_signals): New function.
	(__libc_signal_block_all): Likewise.
	(__libc_signal_block_app): Likewise.
	(__libc_signal_restore_set): Likewise.
	* sysdeps/unix/sysv/linux/pt-raise.c (raise): Use Linux raise.c
	implementation.
	* sysdeps/unix/sysv/linux/raise.c (raise): Reimplement to not use
	the cached pid/tid value in pthread structure.
2016-07-13 17:08:51 +01:00