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