setjmp.S 1.4 KB

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  1. /*
  2. * GRUB -- GRand Unified Bootloader
  3. * Copyright (C) 2003,2007 Free Software Foundation, Inc.
  4. *
  5. * GRUB is free software: you can redistribute it and/or modify
  6. * it under the terms of the GNU General Public License as published by
  7. * the Free Software Foundation, either version 3 of the License, or
  8. * (at your option) any later version.
  9. *
  10. * GRUB is distributed in the hope that it will be useful,
  11. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13. * GNU General Public License for more details.
  14. *
  15. * You should have received a copy of the GNU General Public License
  16. * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
  17. */
  18. #include <grub/symbol.h>
  19. #include <grub/dl.h>
  20. .file "setjmp.S"
  21. GRUB_MOD_LICENSE "GPLv3+"
  22. .text
  23. /*
  24. * int grub_setjmp (grub_jmp_buf env)
  25. */
  26. FUNCTION(grub_setjmp)
  27. movl %ebx, 0(%eax) /* EBX */
  28. movl %esi, 4(%eax) /* ESI */
  29. movl %edi, 8(%eax) /* EDI */
  30. movl %ebp, 12(%eax) /* EBP */
  31. popl %ecx
  32. movl %esp, 16(%eax) /* ESP */
  33. movl %ecx, 20(%eax) /* EIP */
  34. xorl %eax, %eax
  35. jmp *%ecx
  36. /*
  37. * int grub_longjmp (grub_jmp_buf env, int val)
  38. */
  39. FUNCTION(grub_longjmp)
  40. movl 0(%eax), %ebx
  41. movl 4(%eax), %esi
  42. movl 8(%eax), %edi
  43. movl 12(%eax), %ebp
  44. movl 16(%eax), %esp
  45. movl 20(%eax), %ecx
  46. movl %edx, %eax
  47. testl %eax, %eax
  48. jnz 1f
  49. incl %eax
  50. 1: jmp *%ecx