/build/unix/elfhack/inject.c

http://github.com/zpao/v8monkey · C · 71 lines · 27 code · 7 blank · 37 comment · 3 complexity · 7b8bc461a758084d5b829770f20990a2 MD5 · raw file

  1. /* ***** BEGIN LICENSE BLOCK *****
  2. * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  3. *
  4. * The contents of this file are subject to the Mozilla Public License Version
  5. * 1.1 (the "License"); you may not use this file except in compliance with
  6. * the License. You may obtain a copy of the License at
  7. * http://www.mozilla.org/MPL/
  8. *
  9. * Software distributed under the License is distributed on an "AS IS" basis,
  10. * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  11. * for the specific language governing rights and limitations under the
  12. * License.
  13. *
  14. * The Original Code is elfhack.
  15. *
  16. * The Initial Developer of the Original Code is
  17. * Mozilla Foundation.
  18. * Portions created by the Initial Developer are Copyright (C) 2010
  19. * the Initial Developer. All Rights Reserved.
  20. *
  21. * Contributor(s):
  22. * Mike Hommey <mh@glandium.org>
  23. *
  24. * Alternatively, the contents of this file may be used under the terms of
  25. * either the GNU General Public License Version 2 or later (the "GPL"), or
  26. * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27. * in which case the provisions of the GPL or the LGPL are applicable instead
  28. * of those above. If you wish to allow use of your version of this file only
  29. * under the terms of either the GPL or the LGPL, and not to allow others to
  30. * use your version of this file under the terms of the MPL, indicate your
  31. * decision by deleting the provisions above and replace them with the notice
  32. * and other provisions required by the GPL or the LGPL. If you do not delete
  33. * the provisions above, a recipient may use your version of this file under
  34. * the terms of any one of the MPL, the GPL or the LGPL.
  35. *
  36. * ***** END LICENSE BLOCK ***** */
  37. #include <stdint.h>
  38. #include <elf.h>
  39. /* The Android NDK headers define those */
  40. #undef Elf_Ehdr
  41. #undef Elf_Addr
  42. #if BITS == 32
  43. #define Elf_Ehdr Elf32_Ehdr
  44. #define Elf_Addr Elf32_Addr
  45. #else
  46. #define Elf_Ehdr Elf64_Ehdr
  47. #define Elf_Addr Elf64_Addr
  48. #endif
  49. extern __attribute__((visibility("hidden"))) void original_init(int argc, char **argv, char **env);
  50. extern __attribute__((visibility("hidden"))) Elf32_Rel relhack[];
  51. extern __attribute__((visibility("hidden"))) Elf_Ehdr elf_header;
  52. void init(int argc, char **argv, char **env)
  53. {
  54. Elf32_Rel *rel;
  55. Elf_Addr *ptr, *start;
  56. for (rel = relhack; rel->r_offset; rel++) {
  57. start = (Elf_Addr *)((intptr_t)&elf_header + rel->r_offset);
  58. for (ptr = start; ptr < &start[rel->r_info]; ptr++)
  59. *ptr += (intptr_t)&elf_header;
  60. }
  61. #ifndef NOINIT
  62. original_init(argc, argv, env);
  63. #endif
  64. }