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* Copyright (C) 2008 The Android Open Source Project
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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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* * 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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* 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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* The program startup function __libc_init() defined here is
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* used for static executables only (i.e. those that don't depend
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* on shared libraries). It is called from arch-$ARCH/bionic/crtbegin_static.S
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* which is directly invoked by the kernel when the program is launched.
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* The 'structors' parameter contains pointers to various initializer
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* arrays that must be run before the program's 'main' routine is launched.
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#include "pthread_internal.h"
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#include "libc_init_common.h"
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#include <bionic_tls.h>
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static void call_array(void(**list)())
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// First element is -1, list is null-terminated
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__noreturn void __libc_init(uintptr_t *elfdata,
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int (*slingshot)(int, char**, char**),
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structors_array_t const * const structors)
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__libc_init_tls(NULL);
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/* get the initial thread from TLS and add it to gThreadList */
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_pthread_internal_add(__get_thread());
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/* Initialize the C runtime environment */
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__libc_init_common(elfdata);
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/* Several Linux ABIs don't pass the onexit pointer, and the ones that
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* do never use it. Therefore, we ignore it.
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call_array(structors->preinit_array);
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/* .ctors section initializers, for non-arm-eabi ABIs */
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call_array(structors->ctors_array);
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// call static constructors
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call_array(structors->init_array);
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argc = (int) *elfdata;
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argv = (char**)(elfdata + 1);
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envp = argv + argc + 1;
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/* The executable may have its own destructors listed in its .fini_array
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* so we need to ensure that these are called when the program exits
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if (structors->fini_array)
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__cxa_atexit(__libc_fini,structors->fini_array,NULL);
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exit(slingshot(argc, argv, envp));