| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #if defined(__clang__) |
| // clang interprets -fno-builtin more loosely than you might expect, |
| // and thinks it's okay to still substitute builtins as long as they're |
| // named __aeabi_* rather than __builtin_*, which causes infinite |
| // recursion if we have the fortified memcpy visible in this file. |
| #undef _FORTIFY_SOURCE |
| #endif |
| |
| #include <stddef.h> |
| #include <string.h> |
| |
| extern int __cxa_atexit(void (*)(void*), void*, void*); |
| |
| // All of these are weak symbols to avoid multiple definition errors when |
| // linking with libstdc++-v3 or compiler-rt. |
| |
| /* The "C++ ABI for ARM" document states that static C++ constructors, |
| * which are called from the .init_array, should manually call |
| * __aeabi_atexit() to register static destructors explicitly. |
| * |
| * Note that 'dso_handle' is the address of a magic linker-generate |
| * variable from the shared object that contains the constructor/destructor |
| */ |
| |
| int __attribute__((weak)) |
| __aeabi_atexit_impl(void *object, void (*destructor) (void *), void *dso_handle) { |
| return __cxa_atexit(destructor, object, dso_handle); |
| } |
| |
| int __attribute__((weak)) |
| __aeabi_atexit_impl2(void *object, void (*destructor) (void *), void *dso_handle) { |
| return __cxa_atexit(destructor, object, dso_handle); |
| } |
| |
| |
| void __attribute__((weak)) __aeabi_memcpy8_impl(void *dest, const void *src, size_t n) { |
| memcpy(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memcpy4_impl(void *dest, const void *src, size_t n) { |
| memcpy(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memcpy_impl(void *dest, const void *src, size_t n) { |
| memcpy(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memcpy8_impl2(void *dest, const void *src, size_t n) { |
| memcpy(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memcpy4_impl2(void *dest, const void *src, size_t n) { |
| memcpy(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memcpy_impl2(void *dest, const void *src, size_t n) { |
| memcpy(dest, src, n); |
| } |
| |
| |
| void __attribute__((weak)) __aeabi_memmove8_impl(void *dest, const void *src, size_t n) { |
| memmove(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memmove4_impl(void *dest, const void *src, size_t n) { |
| memmove(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memmove_impl(void *dest, const void *src, size_t n) { |
| memmove(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memmove8_impl2(void *dest, const void *src, size_t n) { |
| memmove(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memmove4_impl2(void *dest, const void *src, size_t n) { |
| memmove(dest, src, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memmove_impl2(void *dest, const void *src, size_t n) { |
| memmove(dest, src, n); |
| } |
| |
| /* |
| * __aeabi_memset has the order of its second and third arguments reversed. |
| * This allows __aeabi_memclr to tail-call __aeabi_memset |
| */ |
| |
| void __attribute__((weak)) __aeabi_memset8_impl(void *dest, size_t n, int c) { |
| memset(dest, c, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memset4_impl(void *dest, size_t n, int c) { |
| memset(dest, c, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memset_impl(void *dest, size_t n, int c) { |
| memset(dest, c, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memset8_impl2(void *dest, size_t n, int c) { |
| memset(dest, c, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memset4_impl2(void *dest, size_t n, int c) { |
| memset(dest, c, n); |
| } |
| |
| void __attribute__((weak)) __aeabi_memset_impl2(void *dest, size_t n, int c) { |
| memset(dest, c, n); |
| } |
| |
| |
| void __attribute__((weak)) __aeabi_memclr8_impl(void *dest, size_t n) { |
| __aeabi_memset8_impl(dest, n, 0); |
| } |
| |
| void __attribute__((weak)) __aeabi_memclr4_impl(void *dest, size_t n) { |
| __aeabi_memset4_impl(dest, n, 0); |
| } |
| |
| void __attribute__((weak)) __aeabi_memclr_impl(void *dest, size_t n) { |
| __aeabi_memset_impl(dest, n, 0); |
| } |
| |
| void __attribute__((weak)) __aeabi_memclr8_impl2(void *dest, size_t n) { |
| __aeabi_memset8_impl(dest, n, 0); |
| } |
| |
| void __attribute__((weak)) __aeabi_memclr4_impl2(void *dest, size_t n) { |
| __aeabi_memset4_impl(dest, n, 0); |
| } |
| |
| void __attribute__((weak)) __aeabi_memclr_impl2(void *dest, size_t n) { |
| __aeabi_memset_impl(dest, n, 0); |
| } |
| |
| #define __AEABI_SYMVERS(fn_name) \ |
| __asm__(".symver " #fn_name "_impl, " #fn_name "@@LIBC"); \ |
| __asm__(".symver " #fn_name "_impl2, " #fn_name "@LIBC_PRIVATE") |
| |
| __AEABI_SYMVERS(__aeabi_atexit); |
| __AEABI_SYMVERS(__aeabi_memcpy8); |
| __AEABI_SYMVERS(__aeabi_memcpy4); |
| __AEABI_SYMVERS(__aeabi_memcpy); |
| __AEABI_SYMVERS(__aeabi_memmove8); |
| __AEABI_SYMVERS(__aeabi_memmove4); |
| __AEABI_SYMVERS(__aeabi_memmove); |
| __AEABI_SYMVERS(__aeabi_memset8); |
| __AEABI_SYMVERS(__aeabi_memset4); |
| __AEABI_SYMVERS(__aeabi_memset); |
| __AEABI_SYMVERS(__aeabi_memclr8); |
| __AEABI_SYMVERS(__aeabi_memclr4); |
| __AEABI_SYMVERS(__aeabi_memclr); |
| |
| #undef __AEABI_SYMVERS |