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      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 /* The "C++ ABI for ARM" document states that static C++ constructors,
     34  * which are called from the .init_array, should manually call
     35  * __aeabi_atexit() to register static destructors explicitely.
     36  *
     37  * Note that 'dso_handle' is the address of a magic linker-generate
     38  * variable from the shared object that contains the constructor/destructor
     39  */
     40 
     41 /* Make this a weak symbol to avoid a multiple definition error when linking
     42  * with libstdc++-v3.  */
     43 int __attribute__((weak))
     44 __aeabi_atexit (void *object, void (*destructor) (void *), void *dso_handle)
     45 {
     46     return __cxa_atexit(destructor, object, dso_handle);
     47 }
     48 
     49 
     50 void __aeabi_memcpy8(void *dest, const void *src, size_t n) {
     51     memcpy(dest, src, n);
     52 }
     53 
     54 void __aeabi_memcpy4(void *dest, const void *src, size_t n) {
     55     memcpy(dest, src, n);
     56 }
     57 
     58 void __aeabi_memcpy(void *dest, const void *src, size_t n) {
     59     memcpy(dest, src, n);
     60 }
     61 
     62 
     63 void __aeabi_memmove8(void *dest, const void *src, size_t n) {
     64     memmove(dest, src, n);
     65 }
     66 
     67 void __aeabi_memmove4(void *dest, const void *src, size_t n) {
     68     memmove(dest, src, n);
     69 }
     70 
     71 void __aeabi_memmove(void *dest, const void *src, size_t n) {
     72     memmove(dest, src, n);
     73 }
     74 
     75 /*
     76  * __aeabi_memset has the order of its second and third arguments reversed.
     77  *  This allows __aeabi_memclr to tail-call __aeabi_memset
     78  */
     79 
     80 void __aeabi_memset8(void *dest, size_t n, int c) {
     81     memset(dest, c, n);
     82 }
     83 
     84 void __aeabi_memset4(void *dest, size_t n, int c) {
     85     memset(dest, c, n);
     86 }
     87 
     88 void __aeabi_memset(void *dest, size_t n, int c) {
     89     memset(dest, c, n);
     90 }
     91 
     92 
     93 void __aeabi_memclr8(void *dest, size_t n) {
     94     __aeabi_memset8(dest, n, 0);
     95 }
     96 
     97 void __aeabi_memclr4(void *dest, size_t n) {
     98     __aeabi_memset4(dest, n, 0);
     99 }
    100 
    101 void __aeabi_memclr(void *dest, size_t n) {
    102     __aeabi_memset(dest, n, 0);
    103 }
    104