summaryrefslogtreecommitdiff
path: root/include/strings.h
blob: 943b56504d67e4450166e9c9aaa921290c8a2588 (plain)
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
#ifndef FORTIFY_STRINGS_H_
#define FORTIFY_STRINGS_H_

#include_next <strings.h>

#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0

#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)
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 (n > bos)
		__builtin_trap();
	return bcopy(src, dest, n);
}

static inline __attribute__ ((always_inline))
void
__fortify_bzero(void *src, size_t n)
{
	size_t bos = __builtin_object_size(src, 0);

	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

#endif

#endif