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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.  
  46. static void kputint(unsigned i)
  47. {
  48.     unsigned dummy;
  49.     asm volatile (
  50.         "movl $30, %%eax;"
  51.         "int $0x30"
  52.         : "=d" (dummy) /* output - %edx clobbered */
  53.         : "d" (i) /* input */
  54.         : "%eax","%ecx" /* all scratch registers clobbered */
  55.     );
  56. }
  57.  
  58. void _rtld_main(void)
  59. {
  60.     pcb_t *pcb;
  61.     static dyn_info_t dyn_info;
  62.     elf_info_t lib_info;
  63.     int rc;
  64.  
  65.     printf("Hello, world! (from rtld)\n");
  66.     getchar();
  67.  
  68.     printf("Parse .dynamic section\n");
  69.     pcb = (pcb_t *)PCB_ADDRESS;
  70.     dynamic_parse(pcb->dynamic, 0, &dyn_info);
  71.  
  72.     printf("Program requested library '%s'\n", dyn_info.needed);
  73.    
  74.     rc = elf_load_file("/libtest.so.0", &lib_info);
  75.     if (rc < 0) {
  76.         printf("failed to load library\n");
  77.         return;
  78.     }
  79.  
  80.     printf("Run program..\n");
  81.     pcb->entry();
  82. }
  83.  
  84. /** @}
  85.  */
  86.