libssp/ssp/string.h

   1 /* Checking macros for string functions.
   2    Copyright (C) 2004-2021 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_STRING_H
  36 #define _SSP_STRING_H 1
  37
  38 #include <ssp.h>
  39 #include_next <string.h>
  40
  41 #if __SSP_FORTIFY_LEVEL > 0
  42
  43 #undef memcpy
  44 #undef memmove
  45 #undef memset
  46 #undef strcat
  47 #undef strcpy
  48 #undef strncat
  49 #undef strncpy
  50 #undef mempcpy
  51 #undef stpcpy
  52 #undef bcopy
  53 #undef bzero
  54
  55 #define memcpy(dest, src, len) \
  56   ((__ssp_bos0 (dest) != (size_t) -1)                                   \
  57    ? __builtin___memcpy_chk (dest, src, len, __ssp_bos0 (dest))         \
  58    : __memcpy_ichk (dest, src, len))
  59 static inline __attribute__((__always_inline__)) void *
  60 __memcpy_ichk (void *__restrict__ __dest, const void *__restrict__ __src,
  61                size_t __len)
  62 {
  63   return __builtin___memcpy_chk (__dest, __src, __len, __ssp_bos0 (__dest));
  64 }
  65
  66
  67 #define memmove(dest, src, len) \
  68   ((__ssp_bos0 (dest) != (size_t) -1)                                   \
  69    ? __builtin___memmove_chk (dest, src, len, __ssp_bos0 (dest))                \
  70    : __memmove_ichk (dest, src, len))
  71 static inline __attribute__((__always_inline__)) void *
  72 __memmove_ichk (void *__dest, const void *__src, size_t __len)
  73 {
  74   return __builtin___memmove_chk (__dest, __src, __len, __ssp_bos0 (__dest));
  75 }
  76
  77
  78 #define mempcpy(dest, src, len) \
  79   ((__ssp_bos0 (dest) != (size_t) -1)                                   \
  80    ? __builtin___mempcpy_chk (dest, src, len, __ssp_bos0 (dest))        \
  81    : __mempcpy_ichk (dest, src, len))
  82 static inline __attribute__((__always_inline__)) void *
  83 __mempcpy_ichk (void *__restrict__ __dest, const void *__restrict__ __src,
  84                 size_t __len)
  85 {
  86   return __builtin___mempcpy_chk (__dest, __src, __len, __ssp_bos0 (__dest));
  87 }
  88
  89
  90 #define memset(dest, ch, len) \
  91   ((__ssp_bos0 (dest) != (size_t) -1)                                   \
  92    ? __builtin___memset_chk (dest, ch, len, __ssp_bos0 (dest))          \
  93    : __memset_ichk (dest, ch, len))
  94 static inline __attribute__((__always_inline__)) void *
  95 __memset_ichk (void *__dest, int __ch, size_t __len)
  96 {
  97   return __builtin___memset_chk (__dest, __ch, __len, __ssp_bos0 (__dest));
  98 }
  99
 100 #define bcopy(src, dest, len) ((void) \
 101  ((__ssp_bos0 (dest) != (size_t) -1)                                    \
 102    ? __builtin___memmove_chk (dest, src, len, __ssp_bos0 (dest))        \
 103    : __memmove_ichk (dest, src, len)))
 104 #define bzero(dest, len) ((void) \
 105   ((__ssp_bos0 (dest) != (size_t) -1)                                   \
 106    ? __builtin___memset_chk (dest, '\0', len, __ssp_bos0 (dest))        \
 107    : __memset_ichk (dest, '\0', len)))
 108
 109
 110 #define strcpy(dest, src) \
 111   ((__ssp_bos (dest) != (size_t) -1)                                    \
 112    ? __builtin___strcpy_chk (dest, src, __ssp_bos (dest))               \
 113    : __strcpy_ichk (dest, src))
 114 static inline __attribute__((__always_inline__)) char *
 115 __strcpy_ichk (char *__restrict__ __dest, const char *__restrict__ __src)
 116 {
 117   return __builtin___strcpy_chk (__dest, __src, __ssp_bos (__dest));
 118 }
 119
 120
 121 #define stpcpy(dest, src) \
 122   ((__ssp_bos (dest) != (size_t) -1)                                    \
 123    ? __builtin___stpcpy_chk (dest, src, __ssp_bos (dest))               \
 124    : __stpcpy_ichk (dest, src))
 125 static inline __attribute__((__always_inline__)) char *
 126 __stpcpy_ichk (char *__restrict__ __dest, const char *__restrict__ __src)
 127 {
 128   return __builtin___stpcpy_chk (__dest, __src, __ssp_bos (__dest));
 129 }
 130
 131
 132 #define strncpy(dest, src, len) \
 133   ((__ssp_bos (dest) != (size_t) -1)                                    \
 134    ? __builtin___strncpy_chk (dest, src, len, __ssp_bos (dest))         \
 135    : __strncpy_ichk (dest, src, len))
 136 static inline __attribute__((__always_inline__)) char *
 137 __strncpy_ichk (char *__restrict__ __dest, const char *__restrict__ __src,
 138                 size_t __len)
 139 {
 140   return __builtin___strncpy_chk (__dest, __src, __len, __ssp_bos (__dest));
 141 }
 142
 143
 144 #define strcat(dest, src) \
 145   ((__ssp_bos (dest) != (size_t) -1)                                    \
 146    ? __builtin___strcat_chk (dest, src, __ssp_bos (dest))               \
 147    : __strcat_ichk (dest, src))
 148 static inline __attribute__((__always_inline__)) char *
 149 __strcat_ichk (char *__restrict__ __dest, const char *__restrict__ __src)
 150 {
 151   return __builtin___strcat_chk (__dest, __src, __ssp_bos (__dest));
 152 }
 153
 154
 155 #define strncat(dest, src, len) \
 156   ((__ssp_bos (dest) != (size_t) -1)                                    \
 157    ? __builtin___strncat_chk (dest, src, len, __ssp_bos (dest))         \
 158    : __strncat_ichk (dest, src, len))
 159 static inline __attribute__((__always_inline__)) char *
 160 __strncat_ichk (char *__restrict__ __dest, const char *__restrict__ __src,
 161                 size_t __len)
 162 {
 163   return __builtin___strncat_chk (__dest, __src, __len, __ssp_bos (__dest));
 164 }
 165
 166 #endif /* __SSP_FORTIFY_LEVEL > 0 */
 167 #endif /* _SSP_STRING_H */