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#ifndef _FORTIFY_STRING_H
#define _FORTIFY_STRING_H
#include_next <string.h>
#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
#ifdef __cplusplus
extern "C" {
#endif
#undef memcpy
#undef memmove
#undef memset
#undef strcat
#undef strcpy
#undef strncat
#undef strncpy
__typeof__(memcpy) __memcpy_orig __asm__(__USER_LABEL_PREFIX__ "memcpy");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
void *memcpy(void *dest, const void *src, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
char *d = (char *)dest;
const char *s = (const char *)src;
/* trap if pointers are overlapping but not if dest == src.
* gcc seems to like to generate code that relies on dest == src */
if ((d < s && d + n > s) ||
(s < d && s + n > d))
__builtin_trap();
if (n > bos)
__builtin_trap();
return __memcpy_orig(dest, src, n);
}
__typeof__(memmove) __memmove_orig __asm__(__USER_LABEL_PREFIX__ "memmove");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
void *memmove(void *dest, const void *src, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
if (n > bos)
__builtin_trap();
return __memmove_orig(dest, src, n);
}
__typeof__(memset) __memset_orig __asm__(__USER_LABEL_PREFIX__ "memset");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
void *memset(void *dest, int c, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
if (n > bos)
__builtin_trap();
return __memset_orig(dest, c, n);
}
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
|| defined(_BSD_SOURCE)
#undef stpcpy
__typeof__(stpcpy) __stpcpy_orig __asm__(__USER_LABEL_PREFIX__ "stpcpy");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
char *stpcpy(char *dest, const char *src)
{
size_t bos = __builtin_object_size(dest, 0);
if (strlen(src) + 1 > bos)
__builtin_trap();
return __stpcpy_orig(dest, src);
}
#undef stpncpy
__typeof__(stpncpy) __stpncpy_orig __asm__(__USER_LABEL_PREFIX__ "stpncpy");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
char *stpncpy(char *dest, const char *src, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
if (n > bos)
__builtin_trap();
return __stpncpy_orig(dest, src, n);
}
#endif
__typeof__(strcat) __strcat_orig __asm__(__USER_LABEL_PREFIX__ "strcat");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
char *strcat(char *dest, const char *src)
{
size_t bos = __builtin_object_size(dest, 0);
if (strlen(src) + strlen(dest) + 1 > bos)
__builtin_trap();
return __strcat_orig(dest, src);
}
__typeof__(strcpy) __strcpy_orig __asm__(__USER_LABEL_PREFIX__ "strcpy");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
char *strcpy(char *dest, const char *src)
{
size_t bos = __builtin_object_size(dest, 0);
if (strlen(src) + 1 > bos)
__builtin_trap();
return __strcpy_orig(dest, src);
}
__typeof__(strncat) __strncat_orig __asm__(__USER_LABEL_PREFIX__ "strncat");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
char *strncat(char *dest, const char *src, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
size_t slen, dlen;
if (n > bos) {
slen = strlen(src);
dlen = strlen(dest);
if (slen > n)
slen = n;
if (slen + dlen + 1 > bos)
__builtin_trap();
}
return __strncat_orig(dest, src, n);
}
__typeof__(strncpy) __strncpy_orig __asm__(__USER_LABEL_PREFIX__ "strncpy");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
char *strncpy(char *dest, const char *src, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
if (n > bos)
__builtin_trap();
return __strncpy_orig(dest, src, n);
}
#ifdef _GNU_SOURCE
#undef mempcpy
__typeof__(mempcpy) __mempcpy_orig __asm__(__USER_LABEL_PREFIX__ "mempcpy");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
void *mempcpy(void *dest, const void *src, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
if (n > bos)
__builtin_trap();
return __mempcpy_orig(dest, src, n);
}
#endif
#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#undef strlcat
#undef strlcpy
__typeof__(strlcat) __strlcat_orig __asm__(__USER_LABEL_PREFIX__ "strlcat");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
size_t strlcat(char *dest, const char *src, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
if (n > bos)
__builtin_trap();
return __strlcat_orig(dest, src, n);
}
__typeof__(strlcpy) __strlcpy_orig __asm__(__USER_LABEL_PREFIX__ "strlcpy");
extern __inline __attribute__((__always_inline__,__gnu_inline__,__artificial__))
size_t strlcpy(char *dest, const char *src, size_t n)
{
size_t bos = __builtin_object_size(dest, 0);
if (n > bos)
__builtin_trap();
return __strlcpy_orig(dest, src, n);
}
#endif
#ifdef __cplusplus
}
#endif
#endif
#endif
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