glibc/sysdeps/unix/sysv/linux/sh
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
..
bits
sh3
sh4 Fix SH4 register-dump.h for soft-float. 2016-11-16 03:45:49 +00:00
sys Make SH ucontext always match current kernels. 2016-11-15 21:44:36 +00:00
____longjmp_chk.S
arch-fork.h
atomic-machine.h
brk.c
c++-types.data
clone.S Remove cached PID/TID in clone 2016-11-24 19:38:51 -02:00
configure
configure.ac
fcntl.c
fxstat.c
fxstatat.c
Implies
kernel-features.h Add __ASSUME_DIRECT_SYSVIPC_SYSCALL for Linux 2016-12-28 20:28:56 -02:00
ld.abilist ld.so: Remove __libc_memalign 2016-11-30 16:23:58 +01:00
libanl.abilist
libBrokenLocale.abilist
libc.abilist New string function explicit_bzero (from OpenBSD). 2016-12-16 16:21:54 -05:00
libcrypt.abilist
libdl.abilist
libm.abilist Add roundeven, roundevenf, roundevenl. 2016-12-21 01:48:27 +00:00
libnsl.abilist
libpthread.abilist
libresolv.abilist
librt.abilist
libthread_db.abilist
libutil.abilist
localplt.data ld.so: Remove __libc_memalign 2016-11-30 16:23:58 +01:00
lockf64.c
lowlevel-atomic.h
lxstat.c
makecontext.S
Makefile
pipe.S
profil-counter.h
pt-vfork.S
setegid.c
seteuid.c
setgid.c
setgroups.c
setregid.c
setresgid.c
setresuid.c
setreuid.c
setuid.c
shlib-versions
sigaltstack-offsets.sym
sigcontextinfo.h
smp.h
syscall.S
syscalls.list
sysdep-cancel.h
sysdep.h
sysdep.S
Versions Revert {send,sendm,recv,recvm}msg conformance changes 2016-06-10 11:58:16 -03:00
vfork.S Remove cached PID/TID in clone 2016-11-24 19:38:51 -02:00
xstat.c