bsd-setjmp.S 1.8 KB

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  1. /* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 version.
  2. Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. .global setjmp
  16. .type setjmp,%function
  17. setjmp:
  18. movl 4 (%esp), %eax
  19. /* Save registers. */
  20. movl %ebx, (0 *4)(%eax)
  21. movl %esi, (1 *4)(%eax)
  22. movl %edi, (2 *4)(%eax)
  23. /* Save SP as it will be after we return. */
  24. leal 4 (%esp), %ecx
  25. movl %ecx, (4 *4)(%eax)
  26. /* Save PC we are returning to now. */
  27. movl 0 (%esp), %ecx
  28. movl %ecx, (5 *4)(%eax)
  29. /* Save caller's frame pointer. */
  30. movl %ebp, (3 *4)(%eax)
  31. /* Call __sigjmp_save. */
  32. pushl $1
  33. pushl 8(%esp)
  34. #ifdef __PIC__
  35. /* We cannot use the PLT, because it requires that %ebx be set, but
  36. we can't save and restore our caller's value. Instead, we do an
  37. indirect jump through the GOT, using for the temporary register
  38. %ecx, which is call-clobbered. */
  39. call here2
  40. here2: popl %ecx
  41. addl $_GLOBAL_OFFSET_TABLE_+[.-here2], %ecx
  42. movl __sigjmp_save @GOT (%ecx), %ecx
  43. call *%ecx
  44. #else
  45. call __sigjmp_save
  46. #endif
  47. popl %ecx
  48. popl %edx
  49. ret
  50. .size setjmp,.-setjmp