gnu/usr.bin/cc34/cc_prep/protector.h

   1 /* $DragonFly: src/gnu/usr.bin/cc34/cc_prep/protector.h,v 1.1 2004/06/19 12:34:17 joerg Exp $ */
   2 /* RTL buffer overflow protection function for GNU C compiler
   3    Copyright (C) 2003 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22
  23 /* Declare GUARD variable.  */
  24 #define GUARD_m         Pmode
  25 #define UNITS_PER_GUARD                                         \
  26   MAX(BIGGEST_ALIGNMENT / BITS_PER_UNIT, GET_MODE_SIZE (GUARD_m))
  27
  28 #ifndef L_stack_smash_handler
  29
  30 /* Insert a guard variable before a character buffer and change the order
  31  of pointer variables, character buffers and pointer arguments.  */
  32
  33 extern void prepare_stack_protection  (int);
  34
  35 #ifdef TREE_CODE
  36 /* Search a character array from the specified type tree.  */
  37
  38 extern int search_string_def (tree);
  39 #endif
  40
  41 /* Examine whether the input contains frame pointer addressing.  */
  42
  43 extern int contains_fp (rtx);
  44
  45 /* Return size that is not allocated for stack frame. It will be allocated
  46    to modify the home of pseudo registers called from global_alloc.  */
  47
  48 extern HOST_WIDE_INT get_frame_free_size (void);
  49
  50 /* Allocate a local variable in the stack area before character buffers
  51    to avoid the corruption of it.  */
  52
  53 extern rtx assign_stack_local_for_pseudo_reg (enum machine_mode,
  54                                               HOST_WIDE_INT, int);
  55
  56 #endif