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 #include <stddef.h> 29 #include <string.h> 30 31 extern int __cxa_atexit(void (*)(void*), void*, void* ); 32 33 /* Temporary hack: this variable should not be part of the C library 34 * itself, but placed in the .bss section of each executable or 35 * shared library instead. 36 * 37 * We keep it here temporarily until the build system has been 38 * modified properly to use crtbegin_so.S and crtend_so.S when 39 * generating shared libraries. 40 * 41 * It must be a 'weak' symbol to avoid conflicts with the definitions 42 * that have been moved to crtbegin_static.S and crtbegin_dynamic.S 43 * 44 * For the record, it is used for static C++ object construction 45 * and destruction. See http://www.codesourcery.com/public/cxx-abi/abi.html#dso-dtor 46 */ 47 void* __attribute__((weak)) __dso_handle; 48 49 /* The "C++ ABI for ARM" document states that static C++ constructors, 50 * which are called from the .init_array, should manually call 51 * __aeabi_atexit() to register static destructors explicitely. 52 * 53 * Note that 'dso_handle' is the address of a magic linker-generate 54 * variable from the shared object that contains the constructor/destructor 55 */ 56 57 /* Make this a weak symbol to avoid a multiple definition error when linking 58 * with libstdc++-v3. */ 59 int __attribute__((weak)) 60 __aeabi_atexit (void *object, void (*destructor) (void *), void *dso_handle) 61 { 62 return __cxa_atexit(destructor, object, dso_handle); 63 } 64 65 66 void __aeabi_memcpy8(void *dest, const void *src, size_t n) { 67 memcpy(dest, src, n); 68 } 69 70 void __aeabi_memcpy4(void *dest, const void *src, size_t n) { 71 memcpy(dest, src, n); 72 } 73 74 void __aeabi_memcpy(void *dest, const void *src, size_t n) { 75 memcpy(dest, src, n); 76 } 77 78 79 void __aeabi_memmove8(void *dest, const void *src, size_t n) { 80 memmove(dest, src, n); 81 } 82 83 void __aeabi_memmove4(void *dest, const void *src, size_t n) { 84 memmove(dest, src, n); 85 } 86 87 void __aeabi_memmove(void *dest, const void *src, size_t n) { 88 memmove(dest, src, n); 89 } 90 91 /* 92 * __aeabi_memset has the order of its second and third arguments reversed. 93 * This allows __aeabi_memclr to tail-call __aeabi_memset 94 */ 95 96 void __aeabi_memset8(void *dest, size_t n, int c) { 97 memset(dest, c, n); 98 } 99 100 void __aeabi_memset4(void *dest, size_t n, int c) { 101 memset(dest, c, n); 102 } 103 104 void __aeabi_memset(void *dest, size_t n, int c) { 105 memset(dest, c, n); 106 } 107 108 109 void __aeabi_memclr8(void *dest, size_t n) { 110 __aeabi_memset8(dest, n, 0); 111 } 112 113 void __aeabi_memclr4(void *dest, size_t n) { 114 __aeabi_memset4(dest, n, 0); 115 } 116 117 void __aeabi_memclr(void *dest, size_t n) { 118 __aeabi_memset(dest, n, 0); 119 } 120
