1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/* See LICENSE file for copyright and license details. */
#ifndef FORTIFY_STRINGS_H_
#define FORTIFY_STRINGS_H_
#include_next <strings.h>
#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
#define __errordecl(name, msg) extern void name(void) __attribute__ ((__error__(msg)))
#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) || defined(_POSIX_SOURCE) \
|| (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE+0 < 200809L) \
|| (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)
__errordecl(__bcopy_error, "bcopy: buffer overflow detected");
static inline __attribute__ ((always_inline))
void
__fortify_bcopy(const void *src, void *dest, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
if (__builtin_constant_p(n) && n > bos)
__bcopy_error();
if (n > bos)
__builtin_trap();
return bcopy(src, dest, n);
}
__errordecl(__bzero_error, "bzero: buffer overflow detected");
static inline __attribute__ ((always_inline))
void
__fortify_bzero(void *src, size_t n)
{
size_t bos = __builtin_object_size(src, 0);
if (__builtin_constant_p(n) && n > bos)
__bzero_error();
if (n > bos)
__builtin_trap();
return bzero(src, n);
}
#undef bcopy
#define bcopy(src, dest, n) __fortify_bcopy(src, dest, n)
#undef bzero
#define bzero(src, n) __fortify_bzero(src, n)
#endif
#undef __errordecl
#endif
#endif
|
