1/*
2 * Copyright (C) 2008 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(__clang__)
30// clang interprets -fno-builtin more loosely than you might expect,
31// and thinks it's okay to still substitute builtins as long as they're
32// named __aeabi_* rather than __builtin_*, which causes infinite
33// recursion if we have the fortified memcpy visible in this file.
34#undef _FORTIFY_SOURCE
35#endif
36
37#include <stddef.h>
38#include <string.h>
39
40extern int __cxa_atexit(void (*)(void*), void*, void*);
41
42/* The "C++ ABI for ARM" document states that static C++ constructors,
43 * which are called from the .init_array, should manually call
44 * __aeabi_atexit() to register static destructors explicitly.
45 *
46 * Note that 'dso_handle' is the address of a magic linker-generate
47 * variable from the shared object that contains the constructor/destructor
48 */
49
50// Make this a weak symbol to avoid a multiple definition error when linking with libstdc++-v3.
51int __attribute__((weak))
52__aeabi_atexit(void *object, void (*destructor) (void *), void *dso_handle) {
53    return __cxa_atexit(destructor, object, dso_handle);
54}
55
56
57void __aeabi_memcpy8(void *dest, const void *src, size_t n) {
58    memcpy(dest, src, n);
59}
60
61void __aeabi_memcpy4(void *dest, const void *src, size_t n) {
62    memcpy(dest, src, n);
63}
64
65void __aeabi_memcpy(void *dest, const void *src, size_t n) {
66    memcpy(dest, src, n);
67}
68
69
70void __aeabi_memmove8(void *dest, const void *src, size_t n) {
71    memmove(dest, src, n);
72}
73
74void __aeabi_memmove4(void *dest, const void *src, size_t n) {
75    memmove(dest, src, n);
76}
77
78void __aeabi_memmove(void *dest, const void *src, size_t n) {
79    memmove(dest, src, n);
80}
81
82/*
83 * __aeabi_memset has the order of its second and third arguments reversed.
84 *  This allows __aeabi_memclr to tail-call __aeabi_memset
85 */
86
87void __aeabi_memset8(void *dest, size_t n, int c) {
88    memset(dest, c, n);
89}
90
91void __aeabi_memset4(void *dest, size_t n, int c) {
92    memset(dest, c, n);
93}
94
95void __aeabi_memset(void *dest, size_t n, int c) {
96    memset(dest, c, n);
97}
98
99
100void __aeabi_memclr8(void *dest, size_t n) {
101    __aeabi_memset8(dest, n, 0);
102}
103
104void __aeabi_memclr4(void *dest, size_t n) {
105    __aeabi_memset4(dest, n, 0);
106}
107
108void __aeabi_memclr(void *dest, size_t n) {
109    __aeabi_memset(dest, n, 0);
110}
111