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1 /* Object size checking support macros.
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2 Copyright (C) 2004, 2005, 2009 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 In addition to the permissions in the GNU General Public License, the
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12 Free Software Foundation gives you unlimited permission to link the
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13 compiled version of this file into combinations with other programs,
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14 and to distribute those combinations without any restriction coming
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15 from the use of this file. (The General Public License restrictions
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16 do apply in other respects; for example, they cover modification of
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17 the file, and distribution when not linked into a combine
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18 executable.)
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19
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20 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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21 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 for more details.
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24
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25 Under Section 7 of GPL version 3, you are granted additional
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26 permissions described in the GCC Runtime Library Exception, version
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27 3.1, as published by the Free Software Foundation.
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28
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29 You should have received a copy of the GNU General Public License and
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30 a copy of the GCC Runtime Library Exception along with this program;
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31 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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32 <http://www.gnu.org/licenses/>. */
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33
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34
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35 #ifndef _SSP_H
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36 #define _SSP_H 1
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37
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38 #if _FORTIFY_SOURCE > 0 && __OPTIMIZE__ > 0 \
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39 && defined __GNUC__ \
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40 && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)) \
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41 && !defined __cplusplus
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42 # if _FORTIFY_SOURCE == 1
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43 # define __SSP_FORTIFY_LEVEL 1
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44 # elif _FORTIFY_SOURCE > 1
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45 # define __SSP_FORTIFY_LEVEL 2
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46 # endif
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47 #endif
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48
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49 #if __SSP_FORTIFY_LEVEL > 0
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50 # include <stddef.h>
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51 # define __ssp_bos(ptr) __builtin_object_size (ptr, __SSP_FORTIFY_LEVEL > 1)
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52 # define __ssp_bos0(ptr) __builtin_object_size (ptr, 0)
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53
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54 # define __SSP_REDIRECT(name, proto, alias) \
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55 name proto __asm__ (__SSP_ASMNAME (#alias))
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56 # define __SSP_ASMNAME(cname) __SSP_ASMNAME2 (__USER_LABEL_PREFIX__, cname)
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57 # define __SSP_ASMNAME2(prefix, cname) __SSP_ASMNAME3 (prefix) cname
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58 # define __SSP_ASMNAME3(prefix) #prefix
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59
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60 # @ssp_have_usable_vsnprintf@ __SSP_HAVE_VSNPRINTF
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61
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62 extern void __chk_fail (void) __attribute__((__noreturn__));
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63 #endif
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64
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65 #endif /* _SSP_H */
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