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

   1 /* Copyright (C) 2009-2015 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    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19 #include <signal.h>
  20 #include <sysdep.h>
  21 #define __longjmp ____longjmp_chk
  22 #define CHECK_SP(sp)                                                          \
  23   do {                                                                        \
  24     register unsigned long this_sp asm ("sp");                                \
  25     if ((unsigned long) (sp) < this_sp)                                       \
  26       {                                                                       \
  27         struct sigaltstack oss;                                               \
  28         INTERNAL_SYSCALL_DECL (err);                                          \
  29         int result = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss);      \
  30         if (!INTERNAL_SYSCALL_ERROR_P (result, err)                           \
  31             && ((oss.ss_flags & SS_ONSTACK) == 0                              \
  32                 || ((unsigned long) oss.ss_sp + oss.ss_size                   \
  33                     - (unsigned long) (sp)) < oss.ss_size))                   \
  34           __fortify_fail ("longjmp causes uninitialized stack frame");        \
  35       }                                                                       \
  36   } while (0)
  37
  38 #include <__longjmp.c>