libssp/ssp/ssp.h.in

   1 /* Object size checking support macros.
   2    Copyright (C) 2004-2023 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 In addition to the permissions in the GNU General Public License, the
  12 Free Software Foundation gives you unlimited permission to link the
  13 compiled version of this file into combinations with other programs,
  14 and to distribute those combinations without any restriction coming
  15 from the use of this file.  (The General Public License restrictions
  16 do apply in other respects; for example, they cover modification of
  17 the file, and distribution when not linked into a combine
  18 executable.)
  19
  20 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  21 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  22 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  23 for more details.
  24
  25 Under Section 7 of GPL version 3, you are granted additional
  26 permissions described in the GCC Runtime Library Exception, version
  27 3.1, as published by the Free Software Foundation.
  28
  29 You should have received a copy of the GNU General Public License and
  30 a copy of the GCC Runtime Library Exception along with this program;
  31 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  32 <http://www.gnu.org/licenses/>.  */
  33
  34
  35 #ifndef _SSP_H
  36 #define _SSP_H 1
  37
  38 #if _FORTIFY_SOURCE > 0 && __OPTIMIZE__ > 0 \
  39     && defined __GNUC__ \
  40     && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)) \
  41     && !defined __cplusplus
  42 # if _FORTIFY_SOURCE == 1
  43 #  define __SSP_FORTIFY_LEVEL 1
  44 # elif _FORTIFY_SOURCE > 1
  45 #  define __SSP_FORTIFY_LEVEL 2
  46 # endif
  47 #endif
  48
  49 #if __SSP_FORTIFY_LEVEL > 0
  50 # include <stddef.h>
  51 # define __ssp_bos(ptr) __builtin_object_size (ptr, __SSP_FORTIFY_LEVEL > 1)
  52 # define __ssp_bos0(ptr) __builtin_object_size (ptr, 0)
  53
  54 # define __SSP_REDIRECT(name, proto, alias) \
  55   name proto __asm__ (__SSP_ASMNAME (#alias))
  56 # define __SSP_ASMNAME(cname)  __SSP_ASMNAME2 (__USER_LABEL_PREFIX__, cname)
  57 # define __SSP_ASMNAME2(prefix, cname) __SSP_ASMNAME3 (prefix) cname
  58 # define __SSP_ASMNAME3(prefix) #prefix
  59
  60 # @ssp_have_usable_vsnprintf@ __SSP_HAVE_VSNPRINTF
  61
  62 extern void __chk_fail (void) __attribute__((__noreturn__));
  63 #endif
  64
  65 #endif /* _SSP_H */