ports/sysdeps/unix/sysv/linux/m68k/____longjmp_chk.c

   1 /* Copyright (C) 2009 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <stdio.h>
  20 #include <signal.h>
  21 #include <sysdep.h>
  22 #define __longjmp ____longjmp_chk
  23 #define CHECK_SP(sp)                                                          \
  24   do {                                                                        \
  25     register unsigned long this_sp asm ("sp");                                \
  26     if ((unsigned long) (sp) < this_sp)                                       \
  27       {                                                                       \
  28         struct sigaltstack oss;                                               \
  29         INTERNAL_SYSCALL_DECL (err);                                          \
  30         int result = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss);      \
  31         if (!INTERNAL_SYSCALL_ERROR_P (result, err)                           \
  32             && ((oss.ss_flags & SS_ONSTACK) == 0                              \
  33                 || ((unsigned long) oss.ss_sp + oss.ss_size                   \
  34                     - (unsigned long) (sp)) < oss.ss_size))                   \
  35           __fortify_fail ("longjmp causes uninitialized stack frame");        \
  36       }                                                                       \
  37   } while (0)
  38
  39 #include <__longjmp.c>