san/kasan-memintrinsics.c

   1 /*
   2  * Copyright (c) 2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <string.h>
  30 #include <mach/boolean.h>
  31
  32 #include <mach/boolean.h>
  33 #include <machine/limits.h>
  34 #include <kern/debug.h>
  35
  36 #include <kasan_internal.h>
  37 #include <memintrinsics.h>
  38
  39 #if MEMINTRINSICS
  40 static bool check_intrinsics = true;
  41 #else
  42 static bool check_intrinsics = false;
  43 #endif
  44
  45 void
  46 __asan_bcopy(const void *src, void *dst, size_t sz)
  47 {
  48         if (check_intrinsics) {
  49                 kasan_check_range(src, sz, TYPE_MEMLD);
  50                 kasan_check_range(dst, sz, TYPE_MEMSTR);
  51         }
  52         __nosan_bcopy(src, dst, sz);
  53 }
  54
  55 void *
  56 __asan_memmove(void *src, const void *dst, size_t sz)
  57 {
  58         if (check_intrinsics) {
  59                 kasan_check_range(src, sz, TYPE_MEMLD);
  60                 kasan_check_range(dst, sz, TYPE_MEMSTR);
  61         }
  62         return __nosan_memmove(src, dst, sz);
  63 }
  64
  65 void *
  66 __asan_memcpy(void *dst, const void *src, size_t sz)
  67 {
  68         if (check_intrinsics) {
  69                 kasan_check_range(src, sz, TYPE_MEMLD);
  70                 kasan_check_range(dst, sz, TYPE_MEMSTR);
  71         }
  72         return __nosan_memcpy(dst, src, sz);
  73 }
  74
  75 void *
  76 __asan_memset(void *dst, int c, size_t sz)
  77 {
  78         if (check_intrinsics) {
  79                 kasan_check_range(dst, sz, TYPE_MEMSTR);
  80         }
  81         return __nosan_memset(dst, c, sz);
  82 }
  83
  84 void
  85 __asan_bzero(void *dst, size_t sz)
  86 {
  87         if (check_intrinsics) {
  88                 kasan_check_range(dst, sz, TYPE_MEMSTR);
  89         }
  90         __nosan_bzero(dst, sz);
  91 }
  92
  93 int
  94 __asan_bcmp(const void *a, const void *b, size_t len)
  95 {
  96         if (check_intrinsics) {
  97                 kasan_check_range(a, len, TYPE_MEMLD);
  98                 kasan_check_range(b, len, TYPE_MEMLD);
  99         }
 100         return __nosan_bcmp(a, b, len);
 101 }
 102
 103 int
 104 __asan_memcmp(const void *a, const void *b, size_t n)
 105 {
 106         if (check_intrinsics) {
 107                 kasan_check_range(a, n, TYPE_MEMLD);
 108                 kasan_check_range(b, n, TYPE_MEMLD);
 109         }
 110         return __nosan_memcmp(a, b, n);
 111 }
 112
 113 size_t
 114 __asan_strlcpy(char *dst, const char *src, size_t sz)
 115 {
 116         if (check_intrinsics) {
 117                 kasan_check_range(dst, sz, TYPE_STRINGSTR);
 118         }
 119         return __nosan_strlcpy(dst, src, sz);
 120 }
 121
 122 size_t
 123 __asan_strlcat(char *dst, const char *src, size_t sz)
 124 {
 125         if (check_intrinsics) {
 126                 kasan_check_range(dst, sz, TYPE_STRINGSTR);
 127         }
 128         return __nosan_strlcat(dst, src, sz);
 129 }
 130
 131 char *
 132 __asan_strncpy(char *dst, const char *src, size_t sz)
 133 {
 134         if (check_intrinsics) {
 135                 kasan_check_range(dst, sz, TYPE_STRINGSTR);
 136         }
 137         return __nosan_strncpy(dst, src, sz);
 138 }
 139
 140 char *
 141 __asan_strncat(char *dst, const char *src, size_t sz)
 142 {
 143         if (check_intrinsics) {
 144                 kasan_check_range(dst, strlen(dst) + sz + 1, TYPE_STRINGSTR);
 145         }
 146         return __nosan_strncat(dst, src, sz);
 147 }
 148
 149 size_t
 150 __asan_strnlen(const char *src, size_t sz)
 151 {
 152         if (check_intrinsics) {
 153                 kasan_check_range(src, sz, TYPE_STRINGLD);
 154         }
 155
 156         return __nosan_strnlen(src, sz);
 157 }
 158
 159 size_t
 160 __asan_strlen(const char *src)
 161 {
 162         size_t sz = __nosan_strlen(src);
 163         if (check_intrinsics) {
 164                 kasan_check_range(src, sz + 1, TYPE_STRINGLD);
 165         }
 166         return sz;
 167 }