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  1. /*
  2.  * Copyright (c) 2008 Jiri Svoboda
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup rtld rtld
  30.  * @brief
  31.  * @{
  32.  */
  33. /**
  34.  * @file
  35.  */
  36.  
  37. #include <stdio.h>
  38. #include <unistd.h>
  39. #include <fcntl.h>
  40.  
  41. #include <rtld.h>
  42. #include <dynamic.h>
  43. #include <pcb.h>
  44. #include <elf_load.h>
  45. #include <arch.h>
  46.  
  47. runtime_env_t runtime_env;
  48.  
  49. void _rtld_main(void)
  50. {
  51.     pcb_t *pcb;
  52.     elf_info_t lib_info;
  53.     static module_t prog;
  54.     static module_t lib;
  55.     int rc;
  56.  
  57.     printf("Hello, world! (from rtld)\n");
  58.     getchar();
  59.  
  60.     printf("Parse .dynamic section\n");
  61.     pcb = (pcb_t *)PCB_ADDRESS;
  62.     dynamic_parse(pcb->dynamic, 0, &prog.dyn);
  63.     prog.bias = 0;
  64.     prog.dyn.soname = "[program]";
  65.  
  66.     printf("Program requested library '%s'\n", prog.dyn.needed);
  67.    
  68.     rc = elf_load_file("/libtest.so.0", 0x20000, &lib_info);
  69.     if (rc < 0) {
  70.         printf("failed to load library\n");
  71.         return;
  72.     }
  73.  
  74.     dynamic_parse(lib_info.dynamic, 0x20000, &lib.dyn);
  75.     lib.bias = 0x20000;
  76.     printf("lib.bias=0x%x\n", lib.bias);
  77.  
  78.     runtime_env.program = &prog;
  79.     runtime_env.libc = &lib;
  80.     runtime_env.rtld = NULL;
  81.  
  82.     /* Parse program's relocation tables */
  83.     rel_table_process(&prog, prog.dyn.rel, prog.dyn.rel_sz);
  84.     rel_table_process(&prog, prog.dyn.jmp_rel, prog.dyn.plt_rel_sz);
  85.  
  86.     printf("lib.bias=0x%x\n", lib.bias);
  87.  
  88.     printf("Run program..\n");
  89.     pcb->entry();
  90. }
  91.  
  92. /** @}
  93.  */
  94.