1  /* Copyright (C) 2014-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.
      17  
      18     Versioned copy of debug/longjmp_chk.c modified for versioning
      19     the reverted jmpbuf extension.  */
      20  
      21  #include <shlib-compat.h>
      22  
      23  #if IS_IN (libc) && defined SHARED && SHLIB_COMPAT (libc, GLIBC_2_19, GLIBC_2_20)
      24  /* this is a copy from debug/longjmp_chk.c because we need an unique name
      25     for __longjmp_chk, but it is already named via a define
      26     for __libc_siglongjmp in debug/longjmp_chk.c.  */
      27  # include <setjmp.h>
      28  
      29  // XXX Should move to include/setjmp.h
      30  extern void ____longjmp_chk (__jmp_buf __env, int __val)
      31       __attribute__ ((__noreturn__));
      32  
      33  # define __longjmp ____longjmp_chk
      34  # define __libc_siglongjmp __v1__longjmp_chk
      35  
      36  # include <setjmp/longjmp.c>
      37  
      38  /* In glibc release 2.19 a new versions of __longjmp_chk was introduced,
      39     but was reverted before 2.20. Thus both versions are the same function.  */
      40  strong_alias (__v1__longjmp_chk, __v2__longjmp_chk);
      41  versioned_symbol (libc, __v1__longjmp_chk, __longjmp_chk, GLIBC_2_11);
      42  compat_symbol (libc, __v2__longjmp_chk, __longjmp_chk, GLIBC_2_19);
      43  
      44  #else
      45  
      46  # include <debug/longjmp_chk.c>
      47  
      48  #endif