/*
* 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 <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");
/* rtld_dynamic and rtld->bias were filled out by the bootstrap code */
rtld = &runtime_env.rtld;
dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn);
printf("Parse .dynamic section\n");
pcb = (pcb_t *)PCB_ADDRESS;
dynamic_parse(pcb->dynamic, 0, &prog.dyn);
prog.bias = 0;
prog.dyn.soname = "[program]";
printf("Program requested library '%s'\n", prog.
dyn.
needed);
rc = elf_load_file("/libc.so.0", 0x20000, &lib_info);
if (rc < 0) {
printf("failed to load library\n");
return;
}
dynamic_parse(lib_info.dynamic, 0x20000, &lib.dyn);
lib.bias = 0x20000;
printf("lib.bias=0x%x\n", lib.
bias);
runtime_env.program = &prog;
runtime_env.libc = &lib;
/* Parse program's relocation tables */
printf("Resolve references in program\n");
rel_table_process(&prog, prog.dyn.rel, prog.dyn.rel_sz);
rel_table_process(&prog, prog.dyn.jmp_rel, prog.dyn.plt_rel_sz);
/* Parse lib's relocation tables */
printf("Resolve references in library\n");
rel_table_process(&lib, lib.dyn.rel, lib.dyn.rel_sz);
rel_table_process(&lib, lib.dyn.jmp_rel, lib.dyn.plt_rel_sz);
printf("lib.bias=0x%x\n", lib.
bias);
pcb->entry();
}
/** @}
*/