include/ssp/string.h

   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 *, void *, size_t, size_t);
  40 void *__memset_chk(void *, int, size_t, size_t);
  41 char *__stpcpy_chk(char *, const char *, size_t);
  42 char *__strcat_chk(char *, const char *, size_t);
  43 char *__strcpy_chk(char *, const char *, size_t);
  44 char *__strncat_chk(char *, const char *, size_t, size_t);
  45 char *__strncpy_chk(char *, const char *, size_t, size_t);
  46 __END_DECLS
  47
  48 #if __SSP_FORTIFY_LEVEL > 0
  49
  50 #define __ssp_bos_check3(fun, dst, src, len) \
  51     ((__ssp_bos0(dst) != (size_t)-1) ? \
  52     __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)) : \
  53     __ ## fun ## _ichk(dst, src, len))
  54
  55 #define __ssp_bos_check2(fun, dst, src) \
  56     ((__ssp_bos0(dst) != (size_t)-1) ? \
  57     __builtin___ ## fun ## _chk(dst, src, __ssp_bos0(dst)) : \
  58     __ ## fun ## _ichk(dst, src))
  59
  60 #define __ssp_bos_icheck3_restrict(fun, type1, type2) \
  61 static __inline type1 __ ## fun ## _ichk(type1 __restrict, type2 __restrict, size_t); \
  62 static __inline __attribute__((__always_inline__)) type1 \
  63 __ ## fun ## _ichk(type1 __restrict dst, type2 __restrict src, size_t len) { \
  64         return __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)); \
  65 }
  66
  67 #define __ssp_bos_icheck3(fun, type1, type2) \
  68 static __inline type1 __ ## fun ## _ichk(type1, type2, size_t); \
  69 static __inline __attribute__((__always_inline__)) type1 \
  70 __ ## fun ## _ichk(type1 dst, type2 src, size_t len) { \
  71         return __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)); \
  72 }
  73
  74 #define __ssp_bos_icheck2_restrict(fun, type1, type2) \
  75 static __inline type1 __ ## fun ## _ichk(type1, type2); \
  76 static __inline __attribute__((__always_inline__)) type1 \
  77 __ ## fun ## _ichk(type1 __restrict dst, type2 __restrict src) { \
  78         return __builtin___ ## fun ## _chk(dst, src, __ssp_bos0(dst)); \
  79 }
  80
  81 __BEGIN_DECLS
  82 __ssp_bos_icheck3_restrict(memcpy, void *, const void *)
  83 __ssp_bos_icheck3(memmove, void *, const void *)
  84 __ssp_bos_icheck3(memset, void *, int)
  85 __ssp_bos_icheck2_restrict(stpcpy, char *, const char *)
  86 #if __GNUC_PREREQ__(4,8) || defined(__clang__)
  87 __ssp_bos_icheck3_restrict(stpncpy, char *, const char *)
  88 #endif
  89 __ssp_bos_icheck2_restrict(strcpy, char *, const char *)
  90 __ssp_bos_icheck2_restrict(strcat, char *, const char *)
  91 __ssp_bos_icheck3_restrict(strncpy, char *, const char *)
  92 __ssp_bos_icheck3_restrict(strncat, char *, const char *)
  93 __END_DECLS
  94
  95 #define memcpy(dst, src, len) __ssp_bos_check3(memcpy, dst, src, len)
  96 #define memmove(dst, src, len) __ssp_bos_check3(memmove, dst, src, len)
  97 #define memset(dst, val, len) __ssp_bos_check3(memset, dst, val, len)
  98 #define stpcpy(dst, src) __ssp_bos_check2(stpcpy, dst, src)
  99 #if __GNUC_PREREQ__(4,8) || defined(__clang__)
 100 #define stpncpy(dst, src, len) __ssp_bos_check3(stpncpy, dst, src, len)
 101 #endif
 102 #define strcpy(dst, src) __ssp_bos_check2(strcpy, dst, src)
 103 #define strcat(dst, src) __ssp_bos_check2(strcat, dst, src)
 104 #define strncpy(dst, src, len) __ssp_bos_check3(strncpy, dst, src, len)
 105 #define strncat(dst, src, len) __ssp_bos_check3(strncat, dst, src, len)
 106
 107 #endif /* __SSP_FORTIFY_LEVEL > 0 */
 108 #endif /* _SSP_STRING_H_ */