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/*
 * Copyright (c) 2008 Jiri Svoboda
 * 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/** @addtogroup rtld rtld
 * @brief
 * @{
 */ 
/**
 * @file
 */

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

#include <rtld.h>
#include <dynamic.h>
#include <pcb.h>
#include <elf_load.h>
#include <module.h>
#include <arch.h>

runtime_env_t runtime_env;

void _rtld_main(void)
{
    pcb_t *pcb;
    elf_info_t lib_info;
    static module_t prog;
    static module_t lib;
    module_t *rtld;
    int rc;

    printf("Hello, world! (from rtld)\n");

    /*
     * First we need to process dynamic sections of the two modules
     * that have been already loaded, that is, of ourselves and of
     * the executable program.
     */

    /* rtld_dynamic and rtld->bias were filled out by the bootstrap code */
    rtld = &runtime_env.rtld;
    printf("Parse rtld .dynamic section at 0x%x\n", runtime_env.rtld_dynamic);
    dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn);

    pcb = __pcb_get();
    printf("Parse program .dynamic section at 0x%x\n", pcb->dynamic);
    dynamic_parse(pcb->dynamic, 0, &prog.dyn);
    prog.bias = 0;
    prog.dyn.soname = "[program]";

    /* Initialize list of loaded modules */
    list_initialize(&runtime_env.modules_head);
    list_append(&prog.modules_link, &runtime_env.modules_head);
    list_append(&rtld->modules_link, &runtime_env.modules_head);

    /* Pointer to program module. Used as root of the dependency graph */
    runtime_env.program = &prog;

    /*
     * Now we can continue with loading all other modules.
     */

    printf("Load all program dependencies\n");
    module_load_deps(&prog);

    /*
     * Now relocate/link all modules together.
     */

    /* Process relocations in all modules */
    printf("Relocate all modules\n");
    modules_process_relocs();

    /*
     * Finally, run the main program.
     */
    printf("Run program.. (at 0x%x)\n", (uintptr_t)pcb->entry);
    pcb->entry();
}

/** @}
 */