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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. #include <loader/pcb.h>
  41.  
  42. #include <rtld.h>
  43. #include <dynamic.h>
  44. #include <elf_load.h>
  45. #include <module.h>
  46. #include <rtld_arch.h>
  47.  
  48. runtime_env_t runtime_env;
  49.  
  50. void program_run(void *entry, pcb_t *pcb);
  51.  
  52. static void rtld_main(void)
  53. {
  54.     static module_t prog;
  55.  
  56.     DPRINTF("Hello, world! (from rtld)\n");
  57.  
  58.     /*
  59.      * First we need to process dynamic sections of the executable
  60.      * program and insert it into the module graph.
  61.      */
  62.  
  63.     DPRINTF("Parse program .dynamic section at 0x%x\n", __pcb->dynamic);
  64.     dynamic_parse(__pcb->dynamic, 0, &prog.dyn);
  65.     prog.bias = 0;
  66.     prog.dyn.soname = "[program]";
  67.  
  68.     /* Initialize list of loaded modules */
  69.     list_initialize(&runtime_env.modules_head);
  70.     list_append(&prog.modules_link, &runtime_env.modules_head);
  71.  
  72.     /* Pointer to program module. Used as root of the module graph. */
  73.     runtime_env.program = &prog;
  74.  
  75.     /*
  76.      * Now we can continue with loading all other modules.
  77.      */
  78.  
  79.     DPRINTF("Load all program dependencies\n");
  80.     module_load_deps(&prog);
  81.  
  82.     /*
  83.      * Now relocate/link all modules together.
  84.      */
  85.  
  86.     /* Process relocations in all modules */
  87.     DPRINTF("Relocate all modules\n");
  88.     modules_process_relocs();
  89.  
  90.     /*
  91.      * Finally, run the main program.
  92.      */
  93.     DPRINTF("Run program.. (at 0x%lx)\n", (uintptr_t)__pcb->entry);
  94.  
  95. #ifndef RTLD_DEBUG
  96.     close_console();
  97. #endif
  98.     program_run(__pcb->entry, __pcb);
  99. }
  100.  
  101. int main(int argc, char *argv[])
  102. {
  103.     rtld_main();
  104.     return 0;
  105. }
  106.  
  107. /** @}
  108.  */
  109.