6a9b888d7c
With this patch, _and_ an upcoming build/ patch, the destruction
of static C++ objects contained in shared libraries will happen
properly when dlclose() is called.
Note that this change introduces crtbegin_so.S and crtend_so.S which
are currently ignored by the build system.
+ move definition of __dso_handle to the right place
(before that, all shared libraries used the __dso_handle
global variable from the C library).
Note that we keep a 'weak' __dso_handle in aeabi.c to avoid
breaking the build until the next patch to build/core/combo/
appears. We will be able to remove that later.
+ move bionic/aeabi.c to arch-arm/bionic/ (its proper location)
Change-Id: Ie771aa204e3acbdf02fd30ebd4150373a1398f39
NOTE: The NDK will need to be modified to enable this feature in
the shared libraries that are generated through it.
119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stddef.h>
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#include <string.h>
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extern int __cxa_atexit(void (*)(void*), void*, void* );
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/* Temporary hack: this variable should not be part of the C library
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* itself, but placed in the .bss section of each executable or
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* shared library instead.
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*
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* We keep it here temporarily until the build system has been
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* modified properly to use crtbegin_so.S and crtend_so.S when
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* generating shared libraries.
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*
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* It must be a 'weak' symbol to avoid conflicts with the definitions
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* that have been moved to crtbegin_static.S and crtbegin_dynamic.S
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*
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* For the record, it is used for static C++ object construction
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* and destruction. See http://www.codesourcery.com/public/cxx-abi/abi.html#dso-dtor
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*/
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void* __attribute__((weak)) __dso_handle;
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/* The "C++ ABI for ARM" document states that static C++ constructors,
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* which are called from the .init_array, should manually call
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* __aeabi_atexit() to register static destructors explicitely.
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*
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* Note that 'dso_handle' is the address of a magic linker-generate
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* variable from the shared object that contains the constructor/destructor
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*/
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/* Make this a weak symbol to avoid a multiple definition error when linking
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* with libstdc++-v3. */
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int __attribute__((weak))
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__aeabi_atexit (void *object, void (*destructor) (void *), void *dso_handle)
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{
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return __cxa_atexit(destructor, object, dso_handle);
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}
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void __aeabi_memcpy8(void *dest, const void *src, size_t n) {
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memcpy(dest, src, n);
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}
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void __aeabi_memcpy4(void *dest, const void *src, size_t n) {
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memcpy(dest, src, n);
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}
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void __aeabi_memcpy(void *dest, const void *src, size_t n) {
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memcpy(dest, src, n);
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}
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void __aeabi_memmove8(void *dest, const void *src, size_t n) {
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memmove(dest, src, n);
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}
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void __aeabi_memmove4(void *dest, const void *src, size_t n) {
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memmove(dest, src, n);
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}
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void __aeabi_memmove(void *dest, const void *src, size_t n) {
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memmove(dest, src, n);
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}
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/*
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* __aeabi_memset has the order of its second and third arguments reversed.
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* This allows __aeabi_memclr to tail-call __aeabi_memset
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*/
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void __aeabi_memset8(void *dest, size_t n, int c) {
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memset(dest, c, n);
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}
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void __aeabi_memset4(void *dest, size_t n, int c) {
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memset(dest, c, n);
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}
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void __aeabi_memset(void *dest, size_t n, int c) {
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memset(dest, c, n);
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}
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void __aeabi_memclr8(void *dest, size_t n) {
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__aeabi_memset8(dest, n, 0);
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}
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void __aeabi_memclr4(void *dest, size_t n) {
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__aeabi_memset4(dest, n, 0);
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}
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void __aeabi_memclr(void *dest, size_t n) {
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__aeabi_memset(dest, n, 0);
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}
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