Mark internal argp functions with attribute_hidden to allow direct
access to them within libc.so and libc.a without using GOT nor PLT.
[BZ #18822]
* argp/argp-fmtstream.c: Include <argp-fmtstream.h>.
* argp/argp-fs-xinl.c: Likewise.
* argp/argp-help.c: Include <argp.h> and <argp-fmtstream.h>.
* argp/argp-parse.c: Include <argp.h>.
* argp/argp-xinl.c: Likewise.
* include/argp-fmtstream.h: New file.
* include/argp.h (__argp_error): Add attribute_hidden.
(__argp_failure): Likewise.
(__argp_input): Likewise.
(__argp_state_help): Likewise.
Mark __ptsname_internal, __mktime_internal and __fopen_internal with
attribute_hidden to allow direct access to them within libc.so and
libc.a without using GOT nor PLT.
[BZ #18822]
* include/stdlib.h (__ptsname_internal): Add attribute_hidden.
* include/time.h (__mktime_internal): Likewise.
* libio/iolibio.h (__fopen_internal): Likewise.
from `freeaddrinfo'.
`getifaddrs' and `freeifaddrs' are not in POSIX, they should not be
exposed along `freeaddrinfo' (through `__check_pf') which is POSIX.
* include/ifaddrs.h (__getifaddrs, __freeifaddrs): New declarations,
and use libc_hidden_def on them.
* inet/ifaddrs.c (__getifaddrs, __freeifaddrs): Use libc_hidden_def on
them.
* sysdeps/gnu/ifaddrs.c (__getifaddrs, __freeifaddrs): Likewise.
* inet/check_pf.c (__check_pf): Use __getifaddrs and __freeifaddrs
instead of getifaddrs and freeifaddrs.
`seekdir' is MISC || XOPEN, it should not be exposed along `rewinddir' which
is POSIX.
* include/dirent.h (__seekdir): New declaration.
* sysdeps/mach/hurd/seekdir.c (seekdir): Rename to __seekdir and
redefine as weak alias.
* sysdeps/mach/hurd/rewinddir.c (__rewinddir): Use __seekdir instead
of seekdir.
`revoke' is MISC only, it should not be exposed along `unlockpt' which is
XOPEN.
* include/unistd.h (__revoke): New declaration.
* misc/revoke.c (revoke): Rename to __revoke, and redefine as weak
alias.
* sysdeps/mach/hurd/revoke.c (revoke): Likewise.
* sysdeps/unix/bsd/unlockpt.c (unlockpt): Use __revoke instead of
revoke.
dirfd is XOPEN2K8 only, it should not be exposed along ftw which is earlier.
* include/dirent.h (__dirfd): New declaration.
* dirent/dirfd.c (dirfd): Rename to __dirfd, and redefine as weak
alias.
* sysdeps/posix/dirfd/dirfd.c (dirfd): Likewise.
* sysdeps/mach/hurd/dirfd.c (dirfd): Likewise.
* io/ftw.c (open_dir_stream, ftw_dir): Use __dirfd instead of dirfd.
Problem reported by Florian Weimer [1] and solution suggested by
Andreas Schwab [2]. It also set the same buffer size independent
of architecture max_align_t size.
Checked on x86_64-linux-gnu and i686-linux-gnu.
* lib/malloc/scratch_buffer.h (struct scratch_buffer):
Use an union instead of a max_align_t array for __space,
so that __space is the same size on all platforms.
* malloc/scratch_buffer_grow_preserve.c
(__libc_scratch_buffer_grow_preserve): Likewise.
[1] https://sourceware.org/ml/libc-alpha/2017-09/msg00693.html
[2] https://sourceware.org/ml/libc-alpha/2017-09/msg00695.html
This patch follows commit 5554304f0 (posix: Allow glob to match dangling
symlinks [BZ #866]) by adding a compat symbol that follow previous
semantic of not following dangling symlinks and thus avoiding call
gl_lstat with GLOB_ALTDIRFUNC.
It avoids failure with old binaries that not set the alternate function
pointer for lstat (GNUmake for instance). The following scenario, for
instance, fails with current GNUmake because glibc will access unitialized
memory when calling gl_lstat:
$ cat src/t/t.c
int main ()
{
return 0;
}
$ cat Makefile
SRC = $(wildcard src/*/t.c)
OBJ = $(patsubst src/%.c, obj/%.o, $(SRC))
prog: $(OBJ)
$(CC) $(CFLAGS) $(LDFLAGS) $(LIBS) $(OBJ) -o prog
obj/%.o: src/%.c
$(CC) $(CFLAGS) -c $< -o $@
$ make
This works as expected with the patch applied. Since it is for generic
ABI, default compat symbols are added with override for Linux due LFS.
Now we have two compat symbols for glob on Linux:
1. sysdeps/unix/sysv/linux/oldglob.c which implements glob64 with
the old dirent layout. For this implementation I also set it to
not follow dangling symlinks (which is the safest path).
2. sysdeps/unix/sysv/linux/glob{64}-lstat-compat.c which implements
the compat symbol for dangling symlinks. As for generic glob,
the implementation uses XSTAT_IS_XSTAT64 to define whether
both __glob_lstat_compat and __glob64_lstat_compat should be
different implementations. For archictures that define
XSTAT_IS_XSTAT64, __glob_lstat_compat is aliased to
__glob64_lstat_compat.
3. sysdeps/unix/sysv/linux/alpha/oldglob.c with a different glob_t
layout. As for 1. this patch changes it to not follow dangling
symlinks.
The patch also bumps _GNU_GLOB_INTERFACE_VERSION to 2 to advertise the
new semantic. On GNUmake, for instance, it will force to it use its
internal glob implementation instead and avoiding triggering the same
failure on builds against newer GLIBCs.
Checked on x86_64-linux-gnu and i686-linux-gnu. I also checked
with a build against the major ABIs required to check for the abilist.
The changes should also work on gnulib (I run gnulib-tool.py check glob
and it shown no regressions).
[BZ #22183]
* include/gnu-versions.h (_GNU_GLOB_INTERFACE_VERSION): Increase
version to 2.
* posix/Makefile (routines): Add glob-lstat-compat and
glob64-lstat-compat.
* posix/Versions (GLIBC_2.27, glob, glob64): Add symbol version.
* posix/glob-lstat-compat.c: New file.
* posix/glob64-lstat-compat.c: Likewise.
* posix/tst-glob_lstat_compat.c: Likewise.
* sysdeps/unix/sysv/linux/glob-lstat-compat.c: Likewise.
* sysdeps/unix/sysv/linux/alpha/glob-lstat-compat.c: Likewise.
* sysdeps/unix/sysv/linux/glob64-lstat-compat.c: Likewise.
* sysdeps/unix/sysv/linux/alpha/glob.c: Remove file.
* posix/glob.c (glob_lstat): New function.
(glob): Rename to __glob and add versioned symbol to 2.27.
(glob_in_dir): Use glob_lstat.
* posix/glob64.c (glob64): Add GLOB_ATTRIBUTE.
* sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/glob.c (glob): Add versioned symbol for
2.27.
* sysdeps/unix/sysv/linux/glob64.c (glob64): Likewise.
* sysdeps/unix/sysv/linux/oldglob.c (GLOB_NO_LSTAT): Define.
* sysdeps/unix/sysv/linux/alpha/oldglob.c (__old_glob): Do not use
gl_lstat on glob call.
* sysdeps/unix/sysv/linux/aarch64/libc.abilist: Add GLIBC_2.27 glob
and glob64 symbols.
* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/nios2/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist:
Likewise.
* sysdeps/unix/linux/powerpc/powerpc32/nofpu/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
Many libm functions define the function as __<func> and then define
<func> as a weak alias. This is not at all limited to cases where
there is an internal call that has namespace reasons to need to call
__<func> instead of <func>.
The common macros for creating libm function aliases work on the basis
of public function names all being aliases; that is, they define
aliases for functions using the above pattern. Thus, where a function
just defines the public name <func> directly, changing that to be a
weak alias enables a subsequent conversion to the common macros to
retain the exact existing symbols (and so be testable by comparison of
stripped binaries).
This patch converts many existing functions to use the weak alias
pattern, as preparation for subsequent conversions to common macros.
I do expect that _FloatN/_FloatNx function aliases will end up needing
new variants of the common macros that do *not* create the original
float / double / long double name of a function - for cases where that
name is created specially to give it a particular symbol version, for
example - but for functions that can use the most common macros to
create all the public names as aliases, it makes sense for them to do
so.
Regarding the Bessel function wrappers in this patch: only float and
double wrappers are changed because the long double wrappers already
used the weak alias pattern.
Tested for x86_64, and with build-many-glibcs.py.
* include/math.h (roundeven): Change hidden_proto call to
__roundeven.
* math/w_j0_compat.c (j0): Rename to __j0 and define as weak
alias.
[NO_LONG_DOUBLE] (__j0l): New strong alias.
(y0): Rename to __y0 and define as weak alias.
[NO_LONG_DOUBLE] (__y0l): New strong alias.
* math/w_j0f_compat.c (j0f): Rename to __j0f and define as weak
alias.
(y0f): Rename to __y0f and define as weak alias.
* math/w_j1_compat.c (j1): Rename to __j1 and define as weak
alias.
[NO_LONG_DOUBLE] (__j1l): New strong alias.
(y1): Rename to __y1 and define as weak alias.
[NO_LONG_DOUBLE] (__y1l): New strong alias.
* math/w_j1f_compat.c (j1f): Rename to __j1f and define as weak
alias.
(y1f): Rename to __y1f and define as weak alias.
* math/w_jn_compat.c (jn): Rename to __jn and define as weak
alias.
[NO_LONG_DOUBLE] (__jnl): New strong alias.
(yn): Rename to __yn and define as weak alias.
[NO_LONG_DOUBLE] (__ynl): New strong alias.
* math/w_jnf_compat.c (jnf): Rename to __jnf and define as weak
alias.
(ynf): Rename to __ynf and define as weak alias.
* sysdeps/ieee754/dbl-64/s_fromfp.c (FUNC): Define to __fromfp.
(fromfp): Define as weak alias.
[NO_LONG_DOUBLE] (__fromfpl): New strong alias.
* sysdeps/ieee754/dbl-64/s_fromfpx.c (FUNC): Define to __fromfpx.
(fromfpx): Define as weak alias.
[NO_LONG_DOUBLE] (__fromfpxl): New strong alias.
* sysdeps/ieee754/dbl-64/s_getpayload.c (getpayload): Rename to
__getpayload and define as weak alias.
[NO_LONG_DOUBLE] (__getpayloadl): New strong alias.
* sysdeps/ieee754/dbl-64/s_roundeven.c (roundeven): Rename to
__roundeven and define as weak alias.
[NO_LONG_DOUBLE] (__roundevenl): New strong alias.
* sysdeps/ieee754/dbl-64/s_setpayload.c (FUNC): Define to
__setpayload.
(setpayload): Define as weak alias.
[NO_LONG_DOUBLE] (__setpayloadl): New strong alias.
* sysdeps/ieee754/dbl-64/s_setpayloadsig.c (FUNC): Define to
__setpayloadsig.
(setpayloadsig): Define as weak alias.
[NO_LONG_DOUBLE] (__setpayloadsigl): New strong alias.
* sysdeps/ieee754/dbl-64/s_totalorder.c (totalorder): Rename to
__totalorder and define as weak alias.
[NO_LONG_DOUBLE] (__totalorderl): New strong alias.
* sysdeps/ieee754/dbl-64/s_totalordermag.c (totalordermag): Rename
to __totalordermag and define as weak alias.
[NO_LONG_DOUBLE] (__totalordermagl): New strong alias.
* sysdeps/ieee754/dbl-64/s_ufromfp.c (FUNC): Define to __ufromfp.
(ufromfp): Define as weak alias.
[NO_LONG_DOUBLE] (__ufromfpl): New strong alias.
* sysdeps/ieee754/dbl-64/s_ufromfpx.c (FUNC): Define to
__ufromfpx.
(ufromfpx): Define as weak alias.
[NO_LONG_DOUBLE] (__ufromfpxl): New strong alias.
* sysdeps/ieee754/dbl-64/wordsize-64/s_getpayload.c (getpayload):
Rename to __getpayload and define as weak alias.
[NO_LONG_DOUBLE] (__getpayloadl): New strong alias.
* sysdeps/ieee754/dbl-64/wordsize-64/s_roundeven.c (roundeven):
Rename to __roundeven and define as weak alias.
[NO_LONG_DOUBLE] (__roundevenl): New strong alias.
* sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c (totalorder):
Rename to __totalorder and define as weak alias.
[NO_LONG_DOUBLE] (__totalorderl): New strong alias.
* sysdeps/ieee754/dbl-64/wordsize-64/s_totalordermag.c
(totalordermag): Rename to __totalordermag and define as weak
alias.
[NO_LONG_DOUBLE] (__totalordermagl): New strong alias.
* sysdeps/ieee754/float128/float128_private.h (__getpayloadl): New
macro.
(__roundevenl): Likewise.
(__totalorderl): Likewise.
(__totalordermagl): Likewise
* sysdeps/ieee754/float128/s_fromfpf128.c (FUNC): Define to
__fromfpf128.
(fromfpf128): Define as weak alias.
* sysdeps/ieee754/float128/s_fromfpxf128.c (FUNC): Define to
__fromfpxf128.
(fromfpxf128): Define as weak alias.
* sysdeps/ieee754/float128/s_setpayloadf128.c (FUNC): Define to
__setpayloadf128.
(setpayloadf128): Define as weak alias.
* sysdeps/ieee754/float128/s_setpayloadsigf128.c (FUNC): Define to
__setpayloadsigf128.
(setpayloadsigf128): Define as weak alias.
* sysdeps/ieee754/float128/s_ufromfpf128.c (FUNC): Define to
__ufromfpf128.
(ufromfpf128): Define as weak alias.
* sysdeps/ieee754/float128/s_ufromfpxf128.c (FUNC): Define to
__ufromfpxf128.
(ufromfpxf128): Define as weak alias.
* sysdeps/ieee754/flt-32/s_fromfpf.c (FUNC): Define to __fromfpf.
(fromfpf): Define as weak alias.
* sysdeps/ieee754/flt-32/s_fromfpxf.c (FUNC): Define to
__fromfpxf.
(fromfpxf): Define as weak alias.
* sysdeps/ieee754/flt-32/s_getpayloadf.c (getpayloadf): Rename to
__getpayloadf and define as weak alias.
* sysdeps/ieee754/flt-32/s_roundevenf.c (roundevenf): Rename to
__roundevenf and define as weak alias.
* sysdeps/ieee754/flt-32/s_setpayloadf.c (FUNC): Define to
__setpayloadf.
(setpayloadf): Define as weak alias.
* sysdeps/ieee754/flt-32/s_setpayloadsigf.c (FUNC): Define to
__setpayloadsigf.
(setpayloadsigf): Define as weak alias.
* sysdeps/ieee754/flt-32/s_totalorderf.c (totalorderf): Rename to
__totalorderf and define as weak alias.
* sysdeps/ieee754/flt-32/s_totalordermagf.c (totalordermagf):
Rename to __totalordermagf and define as weak alias.
* sysdeps/ieee754/flt-32/s_ufromfpf.c (FUNC): Define to
__ufromfpf.
(ufromfpf): Define as weak alias.
* sysdeps/ieee754/flt-32/s_ufromfpxf.c (FUNC): Define to
__ufromfpxf.
(ufromfpxf): Define as weak alias.
* sysdeps/ieee754/ldbl-128/s_fromfpl.c (FUNC): Define to
__fromfpl.
(fromfpl): Define as weak alias.
* sysdeps/ieee754/ldbl-128/s_fromfpxl.c (FUNC): Define to
__fromfpxl.
(fromfpxl): Define as weak alias.
* sysdeps/ieee754/ldbl-128/s_getpayloadl.c (getpayloadl): Rename
to __getpayloadl and define as weak alias.
* sysdeps/ieee754/ldbl-128/s_roundevenl.c (roundevenl): Rename to
__roundevenl and define as weak alias.
* sysdeps/ieee754/ldbl-128/s_setpayloadl.c (FUNC): Define to
__setpayloadl.
(setpayloadl): Define as weak alias.
* sysdeps/ieee754/ldbl-128/s_setpayloadsigl.c (FUNC): Define to
__setpayloadsigl.
(setpayloadsigl): Define as weak alias.
* sysdeps/ieee754/ldbl-128/s_totalorderl.c (totalorderl): Rename
to __totalorderl and define as weak alias.
* sysdeps/ieee754/ldbl-128/s_totalordermagl.c (totalordermagl):
Rename to __totalordermagl and define as weak alias.
* sysdeps/ieee754/ldbl-128/s_ufromfpl.c (FUNC): Define to
__ufromfpl.
(ufromfpl): Define as weak alias.
* sysdeps/ieee754/ldbl-128/s_ufromfpxl.c (FUNC): Define to
__ufromfpxl.
(ufromfpxl): Define as weak alias.
* sysdeps/ieee754/ldbl-128ibm/s_fromfpl.c (FUNC): Define to
__fromfpl.
(fromfpl): Define as weak alias.
* sysdeps/ieee754/ldbl-128ibm/s_fromfpxl.c (FUNC): Define to
__fromfpxl.
(fromfpxl): Define as weak alias.
* sysdeps/ieee754/ldbl-128ibm/s_getpayloadl.c (getpayloadl):
Rename to __getpayloadl and define as weak alias.
* sysdeps/ieee754/ldbl-128ibm/s_roundevenl.c (roundevenl): Rename
to __roundevenl and define as weak alias. Call __roundeven
instead of roundeven.
* sysdeps/ieee754/ldbl-128ibm/s_setpayloadl.c (FUNC): Define to
__setpayloadl.
(setpayloadl): Define as weak alias.
* sysdeps/ieee754/ldbl-128ibm/s_setpayloadsigl.c (FUNC): Define to
__setpayloadsigl.
(setpayloadsigl): Define as weak alias.
* sysdeps/ieee754/ldbl-128ibm/s_totalorderl.c (totalorderl):
Rename to __totalorderl and define as weak alias.
* sysdeps/ieee754/ldbl-128ibm/s_totalordermagl.c (totalordermagl):
Rename to __totalordermagl and define as weak alias.
* sysdeps/ieee754/ldbl-128ibm/s_ufromfpl.c (FUNC): Define to
__ufromfpl.
(ufromfpl): Define as weak alias.
* sysdeps/ieee754/ldbl-128ibm/s_ufromfpxl.c (FUNC): Define to
__ufromfpxl.
(ufromfpxl): Define as weak alias.
* sysdeps/ieee754/ldbl-96/s_fromfpl.c (FUNC): Define to
__fromfpl.
(fromfpl): Define as weak alias.
* sysdeps/ieee754/ldbl-96/s_fromfpxl.c (FUNC): Define to
__fromfpxl.
(fromfpxl): Define as weak alias.
* sysdeps/ieee754/ldbl-96/s_getpayloadl.c (getpayloadl): Rename to
__getpayloadl and define as weak alias.
* sysdeps/ieee754/ldbl-96/s_roundevenl.c (roundevenl): Rename to
__roundevenl and define as weak alias.
* sysdeps/ieee754/ldbl-96/s_setpayloadl.c (FUNC): Define to
__setpayloadl.
(setpayloadl): Define as weak alias.
* sysdeps/ieee754/ldbl-96/s_setpayloadsigl.c (FUNC): Define to
__setpayloadsigl.
(setpayloadsigl): Define as weak alias.
* sysdeps/ieee754/ldbl-96/s_totalorderl.c (totalorderl): Rename to
__totalorderl and define as weak alias.
* sysdeps/ieee754/ldbl-96/s_totalordermagl.c (totalordermagl):
Rename to __totalordermagl and define as weak alias.
* sysdeps/ieee754/ldbl-96/s_ufromfpl.c (FUNC): Define to
__ufromfpl.
(ufromfpl): Define as weak alias.
* sysdeps/ieee754/ldbl-96/s_ufromfpxl.c (FUNC): Define to
__ufromfpxl.
(ufromfpxl): Define as weak alias.
This patch syncs the scratch_buffer grom gnulib commit 3866ef6 with
GLIBC code.
Checked on x86_64-linux-gnu and on a build using build-many-glibcs.py
for all major architectures.
* include/scratch_buffer.h (scratch_buffer): Use a C99 align method
instead of GCC extension.
* malloc/scratch_buffer_grow.c [!_LIBC]: Include libc-config.h.
* malloc/scratch_buffer_grow_preserve.c [!_LIBC]: Likewise.
* malloc/scratch_buffer_set_array_size.c [!_LIBC]: Likewise.
* include/shlib-compat.h (TEST_COMPAT): New Macro.
* malloc/tst-mallocstate.c: Convert from test-skeleton
to test-driver. Ifdef code using TEST_COMPAT macro.
* math/test-matherr-2.c: Ifdef test using TEST_COMPAT macro.
* math/test-matherr.c: Likewise.
This patch adds O_TMPFILE support to tmpfile on Linux. This is
similar to the previous suggestion by Andreas Schwab [1] with the
difference the file descriptor creation is parameterized to
compartmentalize Linux only open flags (O_TMPFILE) on sysdeps.
Checked on x86_64-linux-gnu.
Adhemerval Zanella <adhemerval.zanella@linaro.org>
Andreas Schwab <schwab@suse.de>
[BZ #21530]
* include/stdio.h (__gen_tempfd): New function.
* stdio-common/Makefile (routines): Add gentempfd.
* stdio-common/gentempfd.c: New file.
* sysdeps/unix/sysv/linux/gentempfd.c: Likewise.
* stdio-common/tmpfile.c (tmpfile): First try to use a system specific
unnamed file first.
[1] https://sourceware.org/ml/libc-alpha/2017-06/msg01293.html
This patch consolidate the remaning non cancellable syscall definitions
on not-cancel.h header. They are:
* __fcntl_nocancel: Moved from fcntl.h to not-cancel.h.
* __sigsuspend_nocancel: Removed since 988f991b50 it is not used or
defined anymore.
* __nanosleep_nocancel: Removed since 6f33fd046b it is defined on
not-cancel.h.
Now all non-cancellable syscall definition are defined on not-cancel
(the only exceptions is the stdio symbol __fxprintf_nocancel which
uses non cancellable open and it is used on getopt implementation).
Checked on x86_64-linux-gnu and with build-many-glibc.py.
* include/fcntl.h (__fcntl_nocancel): Remove definition.
* include/signal.h (__sigsuspend_nocancel): Likewise.
* include/time.h (__nanosleep_nocancel): Likewise.
* sysdeps/generic/not-cancel.h (__fcntl_nocancel): New macro.
* login/utmp_file.c: Include non cancellable syscall header.
* sysdeps/unix/sysv/linux/not-cancel.h (__fcntl_nocancel): New
prototype.
Since Martin Sebor's commit
commit ee4e992ebe
Author: Martin Sebor <msebor@redhat.com>
Date: Tue Aug 22 09:35:23 2017 -0600
Declare ifunc resolver to return a pointer to the same type as the target
function to help GCC detect incompatibilities between the two when it's
enhanced to do so.
builds for powerpc64le fail in the declaration of some ifunc resolvers,
because the ifunc is declared with unmatching return types. One of the
declarations comes from the __ifunc_resolver macro, which was patched by
the aforementioned commit:
/* Helper / base macros for indirect function symbols. */
#define __ifunc_resolver(type_name, name, expr, arg, init, classifier) \
classifier inhibit_stack_protector \
__typeof (type_name) *name##_ifunc (arg) \
whereas the other comes from the unpatched __ifunc macro when
HAVE_GCC_IFUNC is not defined:
# define __ifunc(type_name, name, expr, arg, init) \
extern __typeof (type_name) name; \
void *name##_ifunc (arg) __asm__ (#name); \
This patch changes the return type of the ifunc resolver in the __ifunc
macro, so that it matches the return type of the target function,
similarly to what the aforementioned commit does.
Tested for powerpc64le and s390x with unpatched GCC.
* include/libc-symbols.h: [!defined HAVE_GCC_IFUNC] (__ifunc):
Change the return type of the ifunc resolver to match the return
type of the target function.
This patch consolidates all the non cancellable pause calls to use
the __pause_nocancel identifier. For non cancellable targets it will
be just a macro to call the default respective symbol while on Linux
will be a internal one.
Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu.
* nptl/pthread_mutex_lock.c (__pthread_mutex_lock_full): Replace
pause_not_cancel with __pause_nocancel.
* sysdeps/generic/not-cancel.h (pause_not_cancel): Remove macro.
(__pause_nocancel): New macro.
* sysdeps/unix/sysv/linux/not-cancel.h (pause_not_cancel): Remove
macro.
(__pause_nocancel): New prototype.
* sysdeps/unix/sysv/linux/pause.c (__pause_nocancel): New function.
Hide internal printf functions to allow direct access within libc.so and
libc.a without using GOT nor PLT.
Since __guess_grouping has been changed to take 2 arguments by
commit a1d84548c8
Author: Ulrich Drepper <drepper@redhat.com>
Date: Fri Feb 11 18:50:36 2000 +0000
the third argument passed to __guess_grouping is removed.
[BZ #18822]
[BZ #21986]
* include/printf.h (__printf_fphex): Add attribute_hidden.
(__guess_grouping): New prototype.
* stdio-common/printf_fp.c (__guess_grouping): Removed.
* stdio-common/reg-printf.c (__register_printf_specifier): Add
libc_hidden_proto and libc_hidden_def.
* stdlib/strfmon_l.c (__guess_grouping): Removed.
(__vstrfmon_l): Remove the third argument passed to
__guess_grouping.
Add hidden visibility to internal function prototypes to allow direct
access to internal functions within libc.a without using GOT when the
compiler defaults to -fPIE.
Size comparison of elf/ldconfig when the compiler defaults to -fPIE:
On x86-64:
text data bss dec hex
Before: 619646 20132 5488 645266 9d892
After : 619502 20132 5488 645122 9d802
On i686:
text data bss dec hex
Before: 550333 10748 3060 564141 89bad
After : 546453 10732 3060 560245 88c75
* include/libc-symbols.h (__hidden_proto_hiddenattr): New for
building libc.a.
(hidden_proto): Likewise.
(hidden_tls_proto): Likewise.
(__hidden_proto): Likewise.
(Reapplied after the revert in df1deda60050cc8a68156cf6c81ad42363647a29.)
The commit
commit 568ff4296c
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Mon Aug 21 05:50:38 2017 -0700
Add hidden visibility to internal function prototypes
breaks the build of the testsuite for many platforms:
https://sourceware.org/ml/libc-testresults/2017-q3/msg00300.html
The errors are of the following form, building math/atest-exp:
[...]
/scratch/jmyers/glibc-bot/build/glibcs/aarch64-linux-gnu/glibc/stdlib/rshift.o: In function `__mpn_rshift':
/scratch/jmyers/glibc-bot/build/glibcs/aarch64-linux-gnu/glibc-src/stdlib/rshift.c:45: undefined reference to `__assert_fail'
/scratch/jmyers/glibc-bot/install/compilers/aarch64-linux-gnu/lib/gcc/aarch64-glibc-linux-gnu/7.2.1/../../../../aarch64-glibc-linux-gnu/bin/ld: /scratch/jmyers/glibc-bot/build/glibcs/aarch64-linux-gnu/glibc/math/atest-exp: hidden symbol `__assert_fail' isn't defined
/scratch/jmyers/glibc-bot/install/compilers/aarch64-linux-gnu/lib/gcc/aarch64-glibc-linux-gnu/7.2.1/../../../../aarch64-glibc-linux-gnu/bin/ld: final link failed: Bad value
This test is using various objects from the build of libc. Some of
those objects contain references to __assert_fail. Because those
references are hidden, they cannot refer to __assert_fail from
libc.so. Given the tests using internal objects those symbols in
libc.a can't safely be made hidden, so this patch reverts the problem
commit until any alternative approach that doesn't break the build can
be found.
This patch obsoletes support for SVID libm error handling (the system
where a user-defined function matherr is called on a libm function
error; only enabled if you also set _LIB_VERSION = _SVID_ or
_LIB_VERSION = _XOPEN_) and the use of the _LIB_VERSION global
variable to control libm error handling. matherr and _LIB_VERSION are
made into compat symbols, not supported for new ports or for static
linking. The libieee.a object file (which sets _LIB_VERSION = _IEEE_,
so disabling errno setting for some functions) is also removed, and
all the related definitions are removed from math.h.
The manual already recommends against using matherr, and it's already
not supported for _Float128 functions (those use new wrappers that
don't support matherr, only errno) - this patch means that it becomes
possible to e.g. add sinf32 as an alias to sinf without that resulting
in undesired matherr support in sinf32 for existing glibc ports.
matherr support is not part of any standard supported by glibc (it was
removed in XPG4).
Because matherr is a function to be defined by the user, of course
user programs defining such a function will still continue to link; it
just quietly won't be used. If they try to write to the library's
copy of _LIB_VERSION to enable SVID error handling, however, they will
get a link error (but if they define their own _LIB_VERSION variable,
they won't).
I expect the most likely case of build failures from this patch to be
programs with unconditional cargo-culted uses of -lieee (based on a
notion of "I want IEEE floating point", not any actual requirement for
that library).
Ideally, the new-port-or-static-linking case would use the new
wrappers used for _Float128. This is not implemented in this patch,
because of the complication of architecture-specific (powerpc32 and
sparc) sqrt wrappers that use _LIB_VERSION and __kernel_standard
directly. Thus, the old wrappers and __kernel_standard are still
built unconditionally, and _LIB_VERSION still exists in static libm.
But when the old wrappers and __kernel_standard are built in the
non-compat case, _LIB_VERSION and matherr are defined as macros so
code to support those features isn't actually built into static libm
or new ports' shared libm after this patch.
I intend to move to the new wrappers for static libm and new ports in
followup patches. I believe the sqrt wrappers for powerpc32 and sparc
can reasonably be removed. GCC already optimizes the normal case of
sqrt by generating code that uses a hardware instruction and only
calls the sqrt function if the argument was negative (if
-fno-math-errno, of course, it just uses the hardware instruction
without any check for negative argument being needed). Thus those
wrappers will only actually get called in the case of negative
arguments, which is not a case it makes sense to optimize for. But
even without removing the powerpc32 and sparc wrappers it should still
be possible to move to the new wrappers for static libm and new ports,
just without having those dubious architecture-specific optimizations
in static libm.
Everything said about matherr equally applies to matherrf and matherrl
(IA64-specific, undocumented), except that the structure of IA64 libm
means it won't be converted to using the new wrappers (it doesn't use
the old ones either, but its own error-handling code instead).
As with other tests of compat symbols, I expect test-matherr and
test-matherr-2 to need to become appropriately conditional once we
have a system for disabling such tests for ports too new to have the
relevant symbols.
Tested for x86_64 and x86, and with build-many-glibcs.py.
* math/math.h [__USE_MISC] (_LIB_VERSION_TYPE): Remove.
[__USE_MISC] (_LIB_VERSION): Likewise.
[__USE_MISC] (struct exception): Likewise.
[__USE_MISC] (matherr): Likewise.
[__USE_MISC] (DOMAIN): Likewise.
[__USE_MISC] (SING): Likewise.
[__USE_MISC] (OVERFLOW): Likewise.
[__USE_MISC] (UNDERFLOW): Likewise.
[__USE_MISC] (TLOSS): Likewise.
[__USE_MISC] (PLOSS): Likewise.
[__USE_MISC] (HUGE): Likewise.
[__USE_XOPEN] (MAXFLOAT): Define even if [__USE_MISC].
* math/math-svid-compat.h: New file.
* conform/linknamespace.pl (@whitelist): Remove matherr, matherrf
and matherrl.
* include/math.h [!_ISOMAC] (__matherr): Remove.
* manual/arith.texi (FP Exceptions): Do not document matherr.
* math/Makefile (tests): Change test-matherr to test-matherr-3.
(tests-internal): New variable.
(install-lib): Do not add libieee.a.
(non-lib.a): Likewise.
(extra-objs): Do not add libieee.a and ieee-math.o.
(CPPFLAGS-s_lib_version.c): Remove variable.
($(objpfx)libieee.a): Remove rule.
($(addprefix $(objpfx), $(tests-internal)): Depend on $(libm).
* math/ieee-math.c: Remove.
* math/libm-test-support.c (matherr): Remove.
* math/test-matherr.c: Use <support/test-driver.c>. Add copyright
and license notices. Include <math-svid-compat.h> and
<shlib-compat.h>.
(matherr): Undefine as macro. Use compat_symbol_reference.
(_LIB_VERSION): Likewise.
* math/test-matherr-2.c: New file.
* math/test-matherr-3.c: Likewise.
* sysdeps/generic/math_private.h (__kernel_standard): Remove
declaration.
(__kernel_standard_f): Likewise.
(__kernel_standard_l): Likewise.
* sysdeps/ieee754/s_lib_version.c: Do not include <math.h> or
<math_private.h>. Include <math-svid-compat.h>.
(_LIB_VERSION): Undefine as macro.
(_LIB_VERSION_INTERNAL): Always initialize to _POSIX_. Define
only if [LIBM_SVID_COMPAT || !defined SHARED]. If
[LIBM_SVID_COMPAT], use compat_symbol.
* sysdeps/ieee754/s_matherr.c: Do not include <math.h> or
<math_private.h>. Include <math-svid-compat.h>.
(matherr): Undefine as macro.
(__matherr): Define only if [LIBM_SVID_COMPAT]. Use
compat_symbol.
* sysdeps/ia64/fpu/libm_error.c: Include <math-svid-compat.h>.
[_LIBC && LIBM_SVID_COMPAT] (matherrf): Use
compat_symbol_reference.
[_LIBC && LIBM_SVID_COMPAT] (matherrl): Likewise.
[_LIBC && !LIBM_SVID_COMPAT] (matherrf): Define as macro.
[_LIBC && !LIBM_SVID_COMPAT] (matherrl): Likewise.
* sysdeps/ia64/fpu/libm_support.h: Include <math-svid-compat.h>.
(MATHERR_D): Remove declaration.
[!_LIBC] (_LIB_VERSION_TYPE): Likewise
[!LIBM_BUILD] (_LIB_VERSIONIMF): Likewise.
[LIBM_BUILD] (pmatherrf): Likewise.
[LIBM_BUILD] (pmatherr): Likewise.
[LIBM_BUILD] (pmatherrl): Likewise.
(DOMAIN): Likewise.
(SING): Likewise.
(OVERFLOW): Likewise.
(UNDERFLOW): Likewise.
(TLOSS): Likewise.
(PLOSS): Likewise.
* sysdeps/ia64/fpu/s_matherrf.c: Include <math-svid-compat.h>.
(__matherrf): Define only if [LIBM_SVID_COMPAT]. Use
compat_symbol.
* sysdeps/ia64/fpu/s_matherrl.c: Include <math-svid-compat.h>.
(__matherrl): Define only if [LIBM_SVID_COMPAT]. Use
compat_symbol.
* math/lgamma-compat.h: Include <math-svid-compat.h>.
* math/w_acos_compat.c: Likewise.
* math/w_acosf_compat.c: Likewise.
* math/w_acosh_compat.c: Likewise.
* math/w_acoshf_compat.c: Likewise.
* math/w_acoshl_compat.c: Likewise.
* math/w_acosl_compat.c: Likewise.
* math/w_asin_compat.c: Likewise.
* math/w_asinf_compat.c: Likewise.
* math/w_asinl_compat.c: Likewise.
* math/w_atan2_compat.c: Likewise.
* math/w_atan2f_compat.c: Likewise.
* math/w_atan2l_compat.c: Likewise.
* math/w_atanh_compat.c: Likewise.
* math/w_atanhf_compat.c: Likewise.
* math/w_atanhl_compat.c: Likewise.
* math/w_cosh_compat.c: Likewise.
* math/w_coshf_compat.c: Likewise.
* math/w_coshl_compat.c: Likewise.
* math/w_exp10_compat.c: Likewise.
* math/w_exp10f_compat.c: Likewise.
* math/w_exp10l_compat.c: Likewise.
* math/w_exp2_compat.c: Likewise.
* math/w_exp2f_compat.c: Likewise.
* math/w_exp2l_compat.c: Likewise.
* math/w_fmod_compat.c: Likewise.
* math/w_fmodf_compat.c: Likewise.
* math/w_fmodl_compat.c: Likewise.
* math/w_hypot_compat.c: Likewise.
* math/w_hypotf_compat.c: Likewise.
* math/w_hypotl_compat.c: Likewise.
* math/w_j0_compat.c: Likewise.
* math/w_j0f_compat.c: Likewise.
* math/w_j0l_compat.c: Likewise.
* math/w_j1_compat.c: Likewise.
* math/w_j1f_compat.c: Likewise.
* math/w_j1l_compat.c: Likewise.
* math/w_jn_compat.c: Likewise.
* math/w_jnf_compat.c: Likewise.
* math/w_jnl_compat.c: Likewise.
* math/w_lgamma_main.c: Likewise.
* math/w_lgamma_r_compat.c: Likewise.
* math/w_lgammaf_main.c: Likewise.
* math/w_lgammaf_r_compat.c: Likewise.
* math/w_lgammal_main.c: Likewise.
* math/w_lgammal_r_compat.c: Likewise.
* math/w_log10_compat.c: Likewise.
* math/w_log10f_compat.c: Likewise.
* math/w_log10l_compat.c: Likewise.
* math/w_log2_compat.c: Likewise.
* math/w_log2f_compat.c: Likewise.
* math/w_log2l_compat.c: Likewise.
* math/w_log_compat.c: Likewise.
* math/w_logf_compat.c: Likewise.
* math/w_logl_compat.c: Likewise.
* math/w_pow_compat.c: Likewise.
* math/w_powf_compat.c: Likewise.
* math/w_powl_compat.c: Likewise.
* math/w_remainder_compat.c: Likewise.
* math/w_remainderf_compat.c: Likewise.
* math/w_remainderl_compat.c: Likewise.
* math/w_scalb_compat.c: Likewise.
* math/w_scalbf_compat.c: Likewise.
* math/w_scalbl_compat.c: Likewise.
* math/w_sinh_compat.c: Likewise.
* math/w_sinhf_compat.c: Likewise.
* math/w_sinhl_compat.c: Likewise.
* math/w_sqrt_compat.c: Likewise.
* math/w_sqrtf_compat.c: Likewise.
* math/w_sqrtl_compat.c: Likewise.
* math/w_tgamma_compat.c: Likewise.
* math/w_tgammaf_compat.c: Likewise.
* math/w_tgammal_compat.c: Likewise.
* sysdeps/ieee754/dbl-64/w_exp_compat.c: Likewise.
* sysdeps/ieee754/flt-32/w_expf_compat.c: Likewise.
* sysdeps/ieee754/k_standard.c: Likewise.
* sysdeps/ieee754/k_standardf.c: Likewise.
* sysdeps/ieee754/k_standardl.c: Likewise.
* sysdeps/ieee754/ldbl-128/w_expl_compat.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/w_expl_compat.c: Likewise.
* sysdeps/ieee754/ldbl-96/w_expl_compat.c: Likewise.
* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrt_compat.S: Likewise.
* sysdeps/powerpc/powerpc32/power4/fpu/w_sqrtf_compat.S: Likewise.
* sysdeps/powerpc/powerpc32/power5/fpu/w_sqrt_compat.S: Likewise.
* sysdeps/powerpc/powerpc32/power5/fpu/w_sqrtf_compat.S: Likewise.
* sysdeps/sparc/sparc32/fpu/w_sqrt_compat.S: Likewise.
* sysdeps/sparc/sparc32/fpu/w_sqrtf_compat.S: Likewise.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/w_sqrt_compat-vis3.S:
Likewise.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/w_sqrtf_compat-vis3.S:
Likewise.
* sysdeps/sparc/sparc32/sparcv9/fpu/w_sqrt_compat.S: Likewise.
* sysdeps/sparc/sparc32/sparcv9/fpu/w_sqrtf_compat.S: Likewise.
* sysdeps/sparc/sparc64/fpu/w_sqrt_compat.S: Likewise.
* sysdeps/sparc/sparc64/fpu/w_sqrtf_compat.S: Likewise.
Add hidden visibility to internal function prototypes to allow direct
access to internal functions within libc.a without using GOT when the
compiler defaults to -fPIE.
Size comparison of elf/ldconfig when the compiler defaults to -fPIE:
On x86-64:
text data bss dec hex
Before: 619646 20132 5488 645266 9d892
After : 619502 20132 5488 645122 9d802
On i686:
text data bss dec hex
Before: 550333 10748 3060 564141 89bad
After : 546453 10732 3060 560245 88c75
* include/libc-symbols.h (__hidden_proto_hiddenattr): New for
building libc.a.
(hidden_proto): Likewise.
(hidden_tls_proto): Likewise.
(__hidden_proto): Likewise.
When building libc.a with PIE, enable hidden visibility to allow direct
access to definitions within libc.a without using GOT.
Size comparison of elf/ldconfig when the compiler defaults to -fPIE:
On x86-64:
text data bss dec hex
Before: 619206 20132 5488 644826 9d6da
After : 619062 20132 5488 644682 9d64a
On i686:
text data bss dec hex
Before: 556305 10816 3056 570177 8b341
After : 553688 10756 3056 567500 8a8cc
* include/libc-symbols.h (attribute_hidden): Enable hidden
visibility in libc.a compiled with PIE.
Since __libc_multiple_libcs is defined as hidden symbol in init-first.c,
it should be always marked with attribute_hidden.
[BZ #18822]
* csu/libc-start.c (__libc_multiple_libcs): Removed.
* elf/dl-open.c: Include <libc-internal.h>.
(__libc_multiple_libcs): Removed.
* elf/dl-sysdep.c: Include <libc-internal.h> instead of
<hp-timing.h>.
* include/libc-internal.h (__libc_multiple_libcs): New.
* misc/sbrk.c: Include <libc-internal.h>.
(__libc_multiple_libcs): Removed.
__bb_init_func and __bb_exit_func have been removed from GCC 3.3 in
2002 by
https://gcc.gnu.org/ml/gcc-patches/2002-09/msg00499.html
which also recommended that they should also be removed from glibc. These
functions exist only in libc.a and are used for gcov from versions of GCC
older than GCC 3.3.
[BZ #21974]
* gmon/Makefile (routines): Remove bb_init_func and
bb_exit_func.
(elide-routines.os): Removed.
* include/sys/gmon.h (__bb): Likewise.
(__bb_init_func): Likewise.
(__bb_exit_func): Likewise.
Move ____longjmp_chk prototype to include/setjmp.h and add
attribute_hidden.
* debug/longjmp_chk.c (____longjmp_chk): Moved to ...
* include/setjmp.h (____longjmp_chk): Here. Add
attribute_hidden.
Move internal argz function prototypes to include/argz.h and mark them
with attribute_hidden to allow direct access within libc.so and libc.a
without using GOT nor PLT. This also brings string/argz.h closer to the
gnulib version.
[BZ #18822]
* include/argz.h (__argz_create_sep): New function prototype.
(__argz_append): Likewise.
(__argz_add): Likewise.
(__argz_add_sep): Likewise.
(__argz_delete): Likewise.
(__argz_insert): Likewise.
(__argz_replace): Likewise.
* string/argz.h (__argz_create_sep): Removed.
(__argz_append): Likewise.
(__argz_add): Likewise.
(__argz_add_sep): Likewise.
(__argz_delete): Likewise.
(__argz_insert): Likewise.
(__argz_replace): Likewise.
XPG4.2 defines the siginfo_t type, but not union sigval or its
contents (which were added in the 1993 edition of POSIX.1), resulting
in namespace violations for sigval, sival_int and sival_ptr for
signal.h and sys/wait.h for that standard because those headers
incorrectly expose those names in that case.
This patch fixes this problem. The public type in this case is union
sigval, but various places in the headers use the sigval_t name for
it; direct uses of union sigval are already properly guarded or in
headers not in XPG4.2. Now, sigval_t, although not a standard name,
does seem to be widely used outside glibc. The approach taken by this
patch is to make installed headers use the name __sigval_t instead.
__sigval_t is then defined to either union sigval or union __sigval
(where union __sigval has __-prefixed member names as well), depending
on whether there are any namespace issues with the union sigval name
and its members. In the case where union __sigval is used, sigval_t
is not defined at all, to avoid the problem of sigval_t having a C++
mangled name that depends on feature test macros. sigval_t is still
defined by signal.h if __USE_MISC (reflecting the nonstandard nature
of that name).
Tested for x86_64.
[BZ #21944]
* signal/bits/types/__sigval_t.h: New file.
* signal/Makefile (headers): Add bits/types/__sigval_t.h.
* signal/bits/types/sigval_t.h: Include <bits/types/__sigval_t.h>
and define sigval_t using __sigval_t.
* include/bits/types/__sigval_t.h: New file.
* bits/types/sigevent_t.h: Include <bits/types/__sigval_t.h>
instead of <bits/types/__sigval_t.h>.
(struct sigevent): Use __sigval_t instead of sigval_t.
* bits/types/siginfo_t.h: Include <bits/types/__sigval_t.h>
instead of <bits/types/__sigval_t.h>.
(siginfo_t): Use __sigval_t instead of sigval_t.
* sysdeps/unix/sysv/linux/bits/types/sigevent_t.h: Include
<bits/types/__sigval_t.h> instead of <bits/types/__sigval_t.h>.
(struct sigevent): Use __sigval_t instead of sigval_t.
* sysdeps/unix/sysv/linux/bits/types/siginfo_t.h: Include
<bits/types/__sigval_t.h> instead of <bits/types/__sigval_t.h>.
(siginfo_t): Use __sigval_t instead of sigval_t.
* signal/signal.h [__USE_MISC]: Include <bits/types/sigval_t.h>.
On Linux/i386, there are 3 ways to make a system call:
1. call *%gs:SYSINFO_OFFSET. This requires TLS initialization.
2. call *_dl_sysinfo. This requires relocation of _dl_sysinfo.
3. int $0x80. This is slower than #2 and #3, but works everywhere.
When an object file is compiled with PIC, #1 is prefered since it is
faster than #3 and doesn't require relocation of _dl_sysinfo. For
dynamic executables, ld.so initializes TLS. However, for static
executables, before TLS is initialized by __libc_setup_tls, #3 should
be used for system calls.
This patch adds <startup.h> which defines _startup_fatal and defaults
it to __libc_fatal. It replaces __libc_fatal with _startup_fatal in
static executables where it is called before __libc_setup_tls is called.
This header file is included in all files containing functions which are
called before __libc_setup_tls is called. On Linux/i386, when PIE is
enabled by default, _startup_fatal is turned into ABORT_INSTRUCTION and
I386_USE_SYSENTER is defined to 0 so that "int $0x80" is used for system
calls before __libc_setup_tls is called.
Tested on i686 and x86-64. Without this patch, all statically-linked
tests will fail on i686 when the compiler defaults to -fPIE.
[BZ #21913]
* csu/libc-tls.c: Include <startup.h> first.
(__libc_setup_tls): Call _startup_fatal instead of __libc_fatal.
* elf/dl-tunables.c: Include <startup.h> first.
* include/libc-symbols.h (BUILD_PIE_DEFAULT): New.
* sysdeps/generic/startup.h: New file.
* sysdeps/unix/sysv/linux/i386/startup.h: Likewise.
* sysdeps/unix/sysv/linux/i386/brk.c [BUILD_PIE_DEFAULT != 0]
(I386_USE_SYSENTER): New. Defined to 0.
The function maybe_enable_malloc_check, which is called by
__tunables_init, calls __access_noerrno. It isn't problem when
symbol is is in ld.so, which has a special version of __access_noerrno
without stack protector. But when glibc is built with stack protector,
maybe_enable_malloc_check in libc.a can't call the regular version of
__access_noerrno with stack protector.
This patch changes how Linux defines the __access_noerrno to be an
inline call instead and thus preventing defining different build
rules for ld/static and shared.
H.J. Lu <hongjiu.lu@intel.com>
Adhemerval Zanella <adhemerval.zanella@linaro.org>
[BZ #21744]
* elf/dl-tunables.c: Include not-errno.h header.
* include/unistd.h (__access_noerrno): Remove definition.
* sysdeps/unix/sysv/linux/access.c (__access_noerrno): Likewise.
* sysdeps/generic/not-errno.h: New file.
* sysdeps/unix/sysv/linux/not-errno.h: Likewise.
