Line data    Source code

       1             : /*
       2             :  * Copyright (C) 2015-2016 Dimitris Papastamos <sin@2f30.org>
       3             :  * Copyright (C) 2022 q66 <q66@chimera-linux.org>
       4             :  *
       5             :  * Permission to use, copy, modify, and/or distribute this software for any
       6             :  * purpose with or without fee is hereby granted.
       7             :  *
       8             :  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
       9             :  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
      10             :  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
      11             :  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
      12             :  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
      13             :  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
      14             :  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
      15             :  */
      16             : 
      17             : #ifndef _FORTIFY_STRINGS_H
      18             : #define _FORTIFY_STRINGS_H
      19             : 
      20             : #include_next <strings.h>
      21             : 
      22             : #if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
      23             : #include "fortify-headers.h"
      24             : 
      25             : #ifdef __cplusplus
      26             : extern "C" {
      27             : #endif
      28             : 
      29             : #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) || defined(_POSIX_SOURCE) \
      30             :  || (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE+0 < 200809L) \
      31             :  || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)
      32             : #undef bcopy
      33             : #undef bzero
      34             : __fh_access(write_only, 2, 3)
      35             : __fh_access(read_only, 1, 3)
      36             : #if __has_builtin(__builtin_bcopy) && !defined(__clang__)
      37             : // parameter 1 of function '__orig_bcopy' has type 'const void *', but parameter 1 of function '__builtin_bcopy' has type 'void *'
      38             : __diagnose_as_builtin(__builtin_bcopy, 1, 2, 3)
      39             : #endif
      40             : _FORTIFY_FN(bcopy) void bcopy(const void * _FORTIFY_POS0 __s,
      41             :                               void * _FORTIFY_POS0 __d, size_t __n)
      42             : {
      43             :         __fh_size_t __bd = __fh_bos(__d, 0);
      44             :         __fh_size_t __bs = __fh_bos(__s, 0);
      45             : 
      46           2 :         if (__n > __bd || __n > __bs)
      47           4 :                 __builtin_trap();
      48           4 :         return __orig_bcopy(__s, __d, __n);
      49             : }
      50             : 
      51             : __fh_access(write_only, 1, 2)
      52             : #if __has_builtin(__builtin_bzero)
      53             : __diagnose_as_builtin(__builtin_bzero, 1, 2)
      54             : #endif
      55             : _FORTIFY_FN(bzero) void bzero(void * _FORTIFY_POS0 __s, size_t __n)
      56             : {
      57             :         __fh_size_t __b = __fh_bos(__s, 0);
      58             : 
      59           1 :         if (__n > __b)
      60           2 :                 __builtin_trap();
      61           2 :         return __orig_bzero(__s, __n);
      62             : }
      63             : #endif
      64             : 
      65             : #ifdef __cplusplus
      66             : }
      67             : #endif
      68             : 
      69             : #endif
      70             : 
      71             : #endif