/*
 * Copyright (c) 2010, Courtney Cavin
 *
 * 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 HOLDER 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.
 */

#include <types.h>
#include <stdint.h>
#include <stdlib.h>

char **environ;

int __libc_start_main(int (*main) (int, char **, char **),
                   	int argc, char **argv,
                   	void (*init) (void), void (*fini) (void),
                   	void (*rtld_fini) (void), void *stack_end)

{
	if (rtld_fini)
		atexit(rtld_fini);
	if (fini)
		atexit(fini);

	environ = &argv[argc + 1];

	if (init)
		(*init)();

	exit((*main)(argc, argv, environ));
}

extern void (*__preinit_array_start [])(void);
extern void (*__preinit_array_end [])(void);
extern void (*__init_array_start [])(void);
extern void (*__init_array_end [])(void);
extern void (*__fini_array_start [])(void);
extern void (*__fini_array_end [])(void);

extern void _init(void);
extern void _fini(void);

void __libc_csu_init(void)
{
	size_t size = __preinit_array_end - __preinit_array_start;
	size_t i;
	for (i = 0; i < size; i++)
		(*__preinit_array_start[i])();

	_init();

	size = __init_array_end - __init_array_start;
	for (i = 0; i < size; i++)
		(*__init_array_start[i])();
}

void __libc_csu_fini(void)
{
	size_t i = __fini_array_end - __fini_array_start;
	while (i-- > 0)
		(*__fini_array_start[i])();
	_fini();
}