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1 : /* Copyright (C) 2004-2024 Free Software Foundation, Inc.
2 : This file is part of the GNU C Library.
3 :
4 : The GNU C Library is free software; you can redistribute it and/or
5 : modify it under the terms of the GNU Lesser General Public
6 : License as published by the Free Software Foundation; either
7 : version 2.1 of the License, or (at your option) any later version.
8 :
9 : The GNU C Library is distributed in the hope that it will be useful,
10 : but WITHOUT ANY WARRANTY; without even the implied warranty of
11 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 : Lesser General Public License for more details.
13 :
14 : You should have received a copy of the GNU Lesser General Public
15 : License along with the GNU C Library; if not, see
16 : <https://www.gnu.org/licenses/>. */
17 :
18 : #ifndef _BITS_STRING_FORTIFIED_H
19 : #define _BITS_STRING_FORTIFIED_H 1
20 :
21 : #ifndef _STRING_H
22 : # error "Never use <bits/string_fortified.h> directly; include <string.h> instead."
23 : #endif
24 :
25 : __fortify_function void *
26 323798 : __NTH (memcpy (void *__restrict __dest, const void *__restrict __src,
27 : size_t __len))
28 : {
29 323798 : return __builtin___memcpy_chk (__dest, __src, __len,
30 : __glibc_objsize0 (__dest));
31 : }
32 :
33 : __fortify_function void *
34 1863569 : __NTH (memmove (void *__dest, const void *__src, size_t __len))
35 : {
36 1863569 : return __builtin___memmove_chk (__dest, __src, __len,
37 : __glibc_objsize0 (__dest));
38 : }
39 :
40 : #ifdef __USE_GNU
41 : __fortify_function void *
42 : __NTH (mempcpy (void *__restrict __dest, const void *__restrict __src,
43 : size_t __len))
44 : {
45 : return __builtin___mempcpy_chk (__dest, __src, __len,
46 : __glibc_objsize0 (__dest));
47 : }
48 : #endif
49 :
50 :
51 : /* The first two tests here help to catch a somewhat common problem
52 : where the second and third parameter are transposed. This is
53 : especially problematic if the intended fill value is zero. In this
54 : case no work is done at all. We detect these problems by referring
55 : non-existing functions. */
56 : __fortify_function void *
57 36 : __NTH (memset (void *__dest, int __ch, size_t __len))
58 : {
59 36 : return __builtin___memset_chk (__dest, __ch, __len,
60 : __glibc_objsize0 (__dest));
61 : }
62 :
63 : #ifdef __USE_MISC
64 : # include <bits/strings_fortified.h>
65 :
66 : void __explicit_bzero_chk (void *__dest, size_t __len, size_t __destlen)
67 : __THROW __nonnull ((1)) __fortified_attr_access (__write_only__, 1, 2);
68 :
69 : __fortify_function void
70 : __NTH (explicit_bzero (void *__dest, size_t __len))
71 : {
72 : __explicit_bzero_chk (__dest, __len, __glibc_objsize0 (__dest));
73 : }
74 : #endif
75 :
76 : __fortify_function char *
77 : __NTH (strcpy (char *__restrict __dest, const char *__restrict __src))
78 : {
79 : return __builtin___strcpy_chk (__dest, __src, __glibc_objsize (__dest));
80 : }
81 :
82 : #ifdef __USE_XOPEN2K8
83 : __fortify_function char *
84 : __NTH (stpcpy (char *__restrict __dest, const char *__restrict __src))
85 : {
86 : return __builtin___stpcpy_chk (__dest, __src, __glibc_objsize (__dest));
87 : }
88 : #endif
89 :
90 :
91 : __fortify_function char *
92 : __NTH (strncpy (char *__restrict __dest, const char *__restrict __src,
93 : size_t __len))
94 : {
95 : return __builtin___strncpy_chk (__dest, __src, __len,
96 : __glibc_objsize (__dest));
97 : }
98 :
99 : #ifdef __USE_XOPEN2K8
100 : # if __GNUC_PREREQ (4, 7) || __glibc_clang_prereq (2, 6)
101 : __fortify_function char *
102 : __NTH (stpncpy (char *__dest, const char *__src, size_t __n))
103 : {
104 : return __builtin___stpncpy_chk (__dest, __src, __n,
105 : __glibc_objsize (__dest));
106 : }
107 : # else
108 : extern char *__stpncpy_chk (char *__dest, const char *__src, size_t __n,
109 : size_t __destlen) __THROW
110 : __fortified_attr_access (__write_only__, 1, 3)
111 : __attr_access ((__read_only__, 2));
112 : extern char *__REDIRECT_NTH (__stpncpy_alias, (char *__dest, const char *__src,
113 : size_t __n), stpncpy);
114 :
115 : __fortify_function char *
116 : __NTH (stpncpy (char *__dest, const char *__src, size_t __n))
117 : {
118 : if (__bos (__dest) != (size_t) -1
119 : && (!__builtin_constant_p (__n) || __n > __bos (__dest)))
120 : return __stpncpy_chk (__dest, __src, __n, __bos (__dest));
121 : return __stpncpy_alias (__dest, __src, __n);
122 : }
123 : # endif
124 : #endif
125 :
126 :
127 : __fortify_function char *
128 : __NTH (strcat (char *__restrict __dest, const char *__restrict __src))
129 : {
130 : return __builtin___strcat_chk (__dest, __src, __glibc_objsize (__dest));
131 : }
132 :
133 :
134 : __fortify_function char *
135 : __NTH (strncat (char *__restrict __dest, const char *__restrict __src,
136 : size_t __len))
137 : {
138 : return __builtin___strncat_chk (__dest, __src, __len,
139 : __glibc_objsize (__dest));
140 : }
141 :
142 : #ifdef __USE_MISC
143 : extern size_t __strlcpy_chk (char *__dest, const char *__src, size_t __n,
144 : size_t __destlen) __THROW;
145 : extern size_t __REDIRECT_NTH (__strlcpy_alias,
146 : (char *__dest, const char *__src, size_t __n),
147 : strlcpy);
148 :
149 : __fortify_function size_t
150 : __NTH (strlcpy (char *__restrict __dest, const char *__restrict __src,
151 : size_t __n))
152 : {
153 : if (__glibc_objsize (__dest) != (size_t) -1
154 : && (!__builtin_constant_p (__n > __glibc_objsize (__dest))
155 : || __n > __glibc_objsize (__dest)))
156 : return __strlcpy_chk (__dest, __src, __n, __glibc_objsize (__dest));
157 : return __strlcpy_alias (__dest, __src, __n);
158 : }
159 :
160 : extern size_t __strlcat_chk (char *__dest, const char *__src, size_t __n,
161 : size_t __destlen) __THROW;
162 : extern size_t __REDIRECT_NTH (__strlcat_alias,
163 : (char *__dest, const char *__src, size_t __n),
164 : strlcat);
165 :
166 : __fortify_function size_t
167 : __NTH (strlcat (char *__restrict __dest, const char *__restrict __src,
168 : size_t __n))
169 : {
170 : if (__glibc_objsize (__dest) != (size_t) -1
171 : && (!__builtin_constant_p (__n > __glibc_objsize (__dest))
172 : || __n > __glibc_objsize (__dest)))
173 : return __strlcat_chk (__dest, __src, __n, __glibc_objsize (__dest));
174 : return __strlcat_alias (__dest, __src, __n);
175 : }
176 : #endif /* __USE_MISC */
177 :
178 : #endif /* bits/string_fortified.h */
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