1 /* $NetBSD: string.h,v 1.14 2020/09/05 13:37:59 mrg Exp $ */ 2 3 /*- 4 * 5 * SPDX-License-Identifier: BSD-2-Clause 6 * 7 * Copyright (c) 2006 The NetBSD Foundation, Inc. 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Christos Zoulas. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 #ifndef _SSP_STRING_H_ 35 #define _SSP_STRING_H_ 36 37 #include <ssp/ssp.h> 38 39 __BEGIN_DECLS 40 void *__memcpy_chk(void *, const void *, size_t, size_t); 41 void *__memmove_chk(void *, const void *, size_t, size_t); 42 void *__memset_chk(void *, int, size_t, size_t); 43 char *__stpcpy_chk(char *, const char *, size_t); 44 char *__stpncpy_chk(char *, const char *, size_t, size_t); 45 char *__strcat_chk(char *, const char *, size_t); 46 char *__strcpy_chk(char *, const char *, size_t); 47 char *__strncat_chk(char *, const char *, size_t, size_t); 48 size_t __strlcat_chk(char *, const char *, size_t, size_t); 49 char *__strncpy_chk(char *, const char *, size_t, size_t); 50 size_t __strlcpy_chk(char *, const char *, size_t, size_t); 51 __END_DECLS 52 53 #if __SSP_FORTIFY_LEVEL > 0 54 55 #define __ssp_bos_check3_typed_var(fun, dsttype, dsrvar, dst, srctype, srcvar, \ 56 src, lenvar, len) __extension__ ({ \ 57 srctype srcvar = (src); \ 58 dsttype dstvar = (dst); \ 59 size_t lenvar = (len); \ 60 ((__ssp_bos0(dstvar) != (size_t)-1) ? \ 61 __builtin___ ## fun ## _chk(dstvar, srcvar, lenvar, \ 62 __ssp_bos0(dstvar)) : \ 63 __ ## fun ## _ichk(dstvar, srcvar, lenvar)); \ 64 }) 65 66 #define __ssp_bos_check3_typed(fun, dsttype, dst, srctype, src, len) \ 67 __ssp_bos_check3_typed_var(fun, dsttype, __ssp_var(dstv), dst, \ 68 srctype, __ssp_var(srcv), src, __ssp_var(lenv), len) 69 70 #define __ssp_bos_check3(fun, dst, src, len) \ 71 __ssp_bos_check3_typed_var(fun, void *, __ssp_var(dstv), dst, \ 72 const void *, __ssp_var(srcv), src, __ssp_var(lenv), len) 73 74 #define __ssp_bos_check2_var(fun, dstvar, dst, srcvar, src) __extension__ ({ \ 75 const void *srcvar = (src); \ 76 void *dstvar = (dst); \ 77 ((__ssp_bos0(dstvar) != (size_t)-1) ? \ 78 __builtin___ ## fun ## _chk(dstvar, srcvar, \ 79 __ssp_bos0(dstvar)) : \ 80 __ ## fun ## _ichk(dstvar, srcvar)); \ 81 }) 82 83 #define __ssp_bos_check2(fun, dst, src) \ 84 __ssp_bos_check2_var(fun, __ssp_var(dstv), dst, __ssp_var(srcv), src) 85 86 #define __ssp_bos_icheck3_restrict(fun, type1, type2) \ 87 static __inline type1 __ ## fun ## _ichk(type1 __restrict, type2 __restrict, size_t); \ 88 static __inline __attribute__((__always_inline__)) type1 \ 89 __ ## fun ## _ichk(type1 __restrict dst, type2 __restrict src, size_t len) { \ 90 return __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)); \ 91 } 92 93 #define __ssp_bos_icheck3(fun, type1, type2) \ 94 static __inline type1 __ ## fun ## _ichk(type1, type2, size_t); \ 95 static __inline __attribute__((__always_inline__)) type1 \ 96 __ ## fun ## _ichk(type1 dst, type2 src, size_t len) { \ 97 return __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)); \ 98 } 99 100 #define __ssp_bos_icheck2_restrict(fun, type1, type2) \ 101 static __inline type1 __ ## fun ## _ichk(type1, type2); \ 102 static __inline __attribute__((__always_inline__)) type1 \ 103 __ ## fun ## _ichk(type1 __restrict dst, type2 __restrict src) { \ 104 return __builtin___ ## fun ## _chk(dst, src, __ssp_bos0(dst)); \ 105 } 106 107 __BEGIN_DECLS 108 __ssp_bos_icheck3_restrict(memcpy, void *, const void *) 109 __ssp_bos_icheck3_restrict(mempcpy, void *, const void *) 110 __ssp_bos_icheck3(memmove, void *, const void *) 111 __ssp_bos_icheck3(memset, void *, int) 112 __ssp_bos_icheck2_restrict(stpcpy, char *, const char *) 113 __ssp_bos_icheck3_restrict(stpncpy, char *, const char *) 114 __ssp_bos_icheck2_restrict(strcpy, char *, const char *) 115 __ssp_bos_icheck2_restrict(strcat, char *, const char *) 116 __ssp_redirect0(int, strerror_r, (int __errnum, char *__buf, size_t __len), 117 (__errnum, __buf, __len)); 118 __ssp_bos_icheck3_restrict(strncpy, char *, const char *) 119 __ssp_bos_icheck3_restrict(strncat, char *, const char *) 120 __END_DECLS 121 122 #define memcpy(dst, src, len) __ssp_bos_check3(memcpy, dst, src, len) 123 #define mempcpy(dst, src, len) __ssp_bos_check3(mempcpy, dst, src, len) 124 #define memmove(dst, src, len) __ssp_bos_check3(memmove, dst, src, len) 125 #define memset(dst, val, len) \ 126 __ssp_bos_check3_typed(memset, void *, dst, int, val, len) 127 #define stpcpy(dst, src) __ssp_bos_check2(stpcpy, dst, src) 128 #define stpncpy(dst, src, len) __ssp_bos_check3(stpncpy, dst, src, len) 129 #define strcpy(dst, src) __ssp_bos_check2(strcpy, dst, src) 130 #define strcat(dst, src) __ssp_bos_check2(strcat, dst, src) 131 #define strlcpy(dst, src, dstlen) \ 132 __strlcpy_chk(dst, src, dstlen, __ssp_bos(dst)) 133 #define strncpy(dst, src, len) __ssp_bos_check3(strncpy, dst, src, len) 134 #define strlcat(dst, src, dstlen) \ 135 __strlcat_chk(dst, src, dstlen, __ssp_bos(dst)) 136 #define strncat(dst, src, len) __ssp_bos_check3(strncat, dst, src, len) 137 138 #endif /* __SSP_FORTIFY_LEVEL > 0 */ 139 #endif /* _SSP_STRING_H_ */ 140