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