1 /*
2 * Copyright (C) 2019 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #if defined(__BIONIC_FORTIFY)
30
31 __BIONIC_FORTIFY_INLINE
__bionic_bcopy(const void * src,void * const dst __pass_object_size0,size_t len)32 void __bionic_bcopy(const void *src, void* const dst __pass_object_size0, size_t len)
33 __overloadable
34 __clang_error_if(__bos_unevaluated_lt(__bos0(dst), len),
35 "'bcopy' called with size bigger than buffer") {
36 #if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
37 size_t bos = __bos0(dst);
38 if (!__bos_trivially_ge(bos, len)) {
39 __builtin___memmove_chk(dst, src, len, bos);
40 return;
41 }
42 #endif
43 __builtin_memmove(dst, src, len);
44 }
45
46 __BIONIC_FORTIFY_INLINE
__bionic_bzero(void * const b __pass_object_size0,size_t len)47 void __bionic_bzero(void* const b __pass_object_size0, size_t len)
48 __overloadable
49 __clang_error_if(__bos_unevaluated_lt(__bos0(b), len),
50 "'bzero' called with size bigger than buffer") {
51 #if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
52 size_t bos = __bos0(b);
53 if (!__bos_trivially_ge(bos, len)) {
54 __builtin___memset_chk(b, 0, len, bos);
55 return;
56 }
57 #endif
58 __builtin_memset(b, 0, len);
59 }
60
61 #endif /* defined(__BIONIC_FORTIFY) */
62