mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 11:20:07 +00:00
73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/* ABI compatibility for 'longjmp' and 'siglongjmp' symbols in libpthread ABI.
|
|
Copyright (C) 2002-2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <setjmp.h>
|
|
#include <shlib-compat.h>
|
|
|
|
/* libpthread once had its own longjmp (and siglongjmp alias), though there
|
|
was no apparent reason for it. There is no use in having a separate
|
|
symbol in libpthread, but the historical ABI requires it. For static
|
|
linking, there is no need to provide anything here--the libc version
|
|
will be linked in. For shared library ABI compatibility, there must be
|
|
longjmp and siglongjmp symbols in libpthread.so; so we define them using
|
|
IFUNC to redirect to the libc function. */
|
|
|
|
#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22)
|
|
|
|
# if HAVE_IFUNC
|
|
|
|
static __typeof (longjmp) *
|
|
__attribute__ ((used))
|
|
longjmp_resolve (void)
|
|
{
|
|
return &__libc_longjmp;
|
|
}
|
|
|
|
# ifdef HAVE_ASM_SET_DIRECTIVE
|
|
# define DEFINE_LONGJMP(name) \
|
|
asm (".set " #name ", longjmp_resolve\n" \
|
|
".globl " #name "\n" \
|
|
".type " #name ", %gnu_indirect_function");
|
|
# else
|
|
# define DEFINE_LONGJMP(name) \
|
|
asm (#name " = longjmp_resolve\n" \
|
|
".globl " #name "\n" \
|
|
".type " #name ", %gnu_indirect_function");
|
|
# endif
|
|
|
|
# else /* !HAVE_IFUNC */
|
|
|
|
static void __attribute__ ((noreturn, used))
|
|
longjmp_compat (jmp_buf env, int val)
|
|
{
|
|
__libc_longjmp (env, val);
|
|
}
|
|
|
|
# define DEFINE_LONGJMP(name) strong_alias (longjmp_compat, name)
|
|
|
|
# endif /* HAVE_IFUNC */
|
|
|
|
DEFINE_LONGJMP (longjmp_ifunc)
|
|
compat_symbol (libpthread, longjmp_ifunc, longjmp, GLIBC_2_0);
|
|
|
|
DEFINE_LONGJMP (siglongjmp_ifunc)
|
|
compat_symbol (libpthread, siglongjmp_ifunc, siglongjmp, GLIBC_2_0);
|
|
|
|
#endif
|