src/heur-ab.h

   1 /* Detecting stack overflow.  Version for platforms which supply the
   2    fault address and the stack pointer.
   3    Copyright (C) 2003  Bruno Haible <bruno@clisp.org>
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #ifdef __ia64
  20 #define IS_STACK_OVERFLOW \
  21   (is_stk_overflow ((unsigned long) SIGSEGV_FAULT_ADDRESS,  \
  22                     (unsigned long) SIGSEGV_FAULT_STACKPOINTER) \
  23    || is_stk_overflow ((unsigned long) SIGSEGV_FAULT_ADDRESS,  \
  24                        (unsigned long) SIGSEGV_FAULT_BSP_POINTER))
  25 #else
  26 #define IS_STACK_OVERFLOW \
  27   is_stk_overflow ((unsigned long) SIGSEGV_FAULT_ADDRESS, \
  28                    (unsigned long) SIGSEGV_FAULT_STACKPOINTER)
  29 #endif
  30
  31 static int is_stk_overflow (unsigned long addr, unsigned long sp)
  32 {
  33   return (addr <= sp + 4096 && sp <= addr + 4096);
  34 }
  35
  36 static int
  37 remember_stack_top (void *some_variable_on_stack)
  38 {
  39   return 0;
  40 }