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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
#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 stpcpy
#undef stpncpy
#undef strcat
#undef strcpy
#undef strncat
#undef strncpy
extern void *__memcpy_orig(void *, const void *, size_t)
__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 = dest;
const char *s = 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);
}
extern void *__memmove_orig(void *, const void *, size_t)
__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);
}
extern void *__memset_orig(void *, int, size_t)
__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);
}
extern char *__stpcpy_orig(char *, const char *)
__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);
}
extern char *__stpncpy_orig(char *, const char *, size_t)
__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);
}
extern char *__strcat_orig(char *, const char *)
__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);
}
extern char *__strcpy_orig(char *, const char *)
__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);
}
extern char *__strncat_orig(char *, const char *, size_t)
__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);
}
extern char *__strncpy_orig(char *, const char *, size_t)
__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
extern void *__mempcpy_orig(void *, const void *, size_t n)
__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
extern size_t __strlcat_orig(char *, const char *, size_t)
__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);
}
extern size_t __strlcpy_orig(char *, const char *, size_t)
__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
|
