| /* 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 |