1 /*	$NetBSD: string.h,v 1.13 2014/11/29 13:23:48 pooka Exp $	*/
2 
3 /*-
4  * Copyright (c) 2006 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Christos Zoulas.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 #ifndef _SSP_STRING_H_
32 #define _SSP_STRING_H_
33 
34 #include <sys/cdefs.h>
35 #include <ssp/ssp.h>
36 
37 __BEGIN_DECLS
38 void *__memcpy_chk(void *, const void *, size_t, size_t);
39 void *__memmove_chk(void *, const void *, size_t, size_t);
40 void *__mempcpy_chk(void *, const void *, size_t, size_t);
41 void *__memset_chk(void *, int, size_t, size_t);
42 char *__stpcpy_chk(char *, const char *, size_t);
43 char *__strcat_chk(char *, const char *, size_t);
44 char *__strcpy_chk(char *, const char *, size_t);
45 char *__strncat_chk(char *, const char *, size_t, size_t);
46 char *__strncpy_chk(char *, const char *, size_t, size_t);
47 __END_DECLS
48 
49 #if __SSP_FORTIFY_LEVEL > 0
50 
51 #define __ssp_bos_check3(fun, dst, src, len) \
52     ((__ssp_bos0(dst) != (size_t)-1) ? \
53     __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)) : \
54     __ ## fun ## _ichk(dst, src, len))
55 
56 #define __ssp_bos_check2(fun, dst, src) \
57     ((__ssp_bos0(dst) != (size_t)-1) ? \
58     __builtin___ ## fun ## _chk(dst, src, __ssp_bos0(dst)) : \
59     __ ## fun ## _ichk(dst, src))
60 
61 #define __ssp_bos_icheck3_restrict(fun, type1, type2) \
62 __declare_extern_inline(type1) __ ## fun ## _ichk(type1 __restrict, type2 __restrict, size_t); \
63 __declare_extern_inline(type1) \
64 __ ## fun ## _ichk(type1 __restrict dst, type2 __restrict src, size_t len) { \
65 	return __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)); \
66 }
67 
68 #define __ssp_bos_icheck3(fun, type1, type2) \
69 __declare_extern_inline(type1) __ ## fun ## _ichk(type1, type2, size_t); \
70 __declare_extern_inline(type1) \
71 __ ## fun ## _ichk(type1 dst, type2 src, size_t len) { \
72 	return __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)); \
73 }
74 
75 #define __ssp_bos_icheck2_restrict(fun, type1, type2) \
76 __declare_extern_inline(type1) __ ## fun ## _ichk(type1, type2); \
77 __declare_extern_inline(type1) \
78 __ ## fun ## _ichk(type1 __restrict dst, type2 __restrict src) { \
79 	return __builtin___ ## fun ## _chk(dst, src, __ssp_bos0(dst)); \
80 }
81 
82 __BEGIN_DECLS
83 __ssp_bos_icheck3_restrict(memcpy, void *, const void *)
84 __ssp_bos_icheck3(memmove, void *, const void *)
85 __ssp_bos_icheck3_restrict(mempcpy, void *, const void *)
86 __ssp_bos_icheck3(memset, void *, int)
87 __ssp_bos_icheck2_restrict(stpcpy, char *, const char *)
88 #if __GNUC_PREREQ__(4,8) || defined(__clang__)
89 __ssp_bos_icheck3_restrict(stpncpy, char *, const char *)
90 #endif
91 __ssp_bos_icheck2_restrict(strcpy, char *, const char *)
92 __ssp_bos_icheck2_restrict(strcat, char *, const char *)
93 __ssp_bos_icheck3_restrict(strncpy, char *, const char *)
94 __ssp_bos_icheck3_restrict(strncat, char *, const char *)
95 __END_DECLS
96 
97 #define memcpy(dst, src, len) __ssp_bos_check3(memcpy, dst, src, len)
98 #define memmove(dst, src, len) __ssp_bos_check3(memmove, dst, src, len)
99 #if __GNU_VISIBLE
100 #define mempcpy(dst, src, len) __ssp_bos_check3(mempcpy, dst, src, len)
101 #endif
102 #define memset(dst, val, len) __ssp_bos_check3(memset, dst, val, len)
103 #if __POSIX_VISIBLE >= 200809
104 #define stpcpy(dst, src) __ssp_bos_check2(stpcpy, dst, src)
105 #if __GNUC_PREREQ__(4,8) || defined(__clang__)
106 #define stpncpy(dst, src, len) __ssp_bos_check3(stpncpy, dst, src, len)
107 #endif
108 #endif
109 #define strcpy(dst, src) __ssp_bos_check2(strcpy, dst, src)
110 #define strcat(dst, src) __ssp_bos_check2(strcat, dst, src)
111 #define strncpy(dst, src, len) __ssp_bos_check3(strncpy, dst, src, len)
112 #define strncat(dst, src, len) __ssp_bos_check3(strncat, dst, src, len)
113 
114 #endif /* __SSP_FORTIFY_LEVEL > 0 */
115 #endif /* _SSP_STRING_H_ */
116