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/* ABI compatibility for 'longjmp' and 'siglongjmp' symbols in libpthread ABI.
Copyright (C) 2002-2016 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
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