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 void
  40 __asan_bcopy(const void *src, void *dst, size_t sz)
  41 {
  42         kasan_check_range(src, sz, TYPE_MEMR);
  43         kasan_check_range(dst, sz, TYPE_MEMW);
  44         __nosan_bcopy(src, dst, sz);
  45 }
  46
  47 void *
  48 __asan_memmove(void *src, const void *dst, size_t sz)
  49 {
  50         kasan_check_range(src, sz, TYPE_MEMR);
  51         kasan_check_range(dst, sz, TYPE_MEMW);
  52         return __nosan_memmove(src, dst, sz);
  53 }
  54
  55 void *
  56 __asan_memcpy(void *dst, const void *src, size_t sz)
  57 {
  58         kasan_check_range(src, sz, TYPE_MEMR);
  59         kasan_check_range(dst, sz, TYPE_MEMW);
  60         return __nosan_memcpy(dst, src, sz);
  61 }
  62
  63 void *
  64 __asan_memset(void *dst, int c, size_t sz)
  65 {
  66         kasan_check_range(dst, sz, TYPE_MEMW);
  67         return __nosan_memset(dst, c, sz);
  68 }
  69
  70 void
  71 __asan_bzero(void *dst, size_t sz)
  72 {
  73         kasan_check_range(dst, sz, TYPE_MEMW);
  74         __nosan_bzero(dst, sz);
  75 }
  76
  77 int
  78 __asan_bcmp(const void *a, const void *b, size_t len)
  79 {
  80         kasan_check_range(a, len, TYPE_MEMR);
  81         kasan_check_range(b, len, TYPE_MEMR);
  82         return __nosan_bcmp(a, b, len);
  83 }
  84
  85 int
  86 __asan_memcmp(const void *a, const void *b, size_t n)
  87 {
  88         kasan_check_range(a, n, TYPE_MEMR);
  89         kasan_check_range(b, n, TYPE_MEMR);
  90         return __nosan_memcmp(a, b, n);
  91 }
  92
  93 size_t
  94 __asan_strlcpy(char *dst, const char *src, size_t sz)
  95 {
  96         kasan_check_range(dst, sz, TYPE_STRW);
  97         return __nosan_strlcpy(dst, src, sz);
  98 }
  99
 100 size_t
 101 __asan_strlcat(char *dst, const char *src, size_t sz)
 102 {
 103         kasan_check_range(dst, sz, TYPE_STRW);
 104         return __nosan_strlcat(dst, src, sz);
 105 }
 106
 107 char *
 108 __asan_strncpy(char *dst, const char *src, size_t sz)
 109 {
 110         kasan_check_range(dst, sz, TYPE_STRW);
 111         return __nosan_strncpy(dst, src, sz);
 112 }
 113
 114 char *
 115 __asan_strncat(char *dst, const char *src, size_t sz)
 116 {
 117         kasan_check_range(dst, strlen(dst) + sz + 1, TYPE_STRW);
 118         return __nosan_strncat(dst, src, sz);
 119 }
 120
 121 size_t
 122 __asan_strnlen(const char *src, size_t sz)
 123 {
 124         kasan_check_range(src, sz, TYPE_STRR);
 125         return __nosan_strnlen(src, sz);
 126 }
 127
 128 size_t
 129 __asan_strlen(const char *src)
 130 {
 131         size_t sz = __nosan_strlen(src);
 132         kasan_check_range(src, sz + 1, TYPE_STRR);
 133         return sz;
 134 }