bsd-_setjmp.S 1.7 KB

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  1. /* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. i386 version.
  2. Copyright (C) 1994,1995,1996,1997,2000,2001 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, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. /* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
  17. We cannot do it in C because it must be a tail-call, so frame-unwinding
  18. in setjmp doesn't clobber the state restored by longjmp. */
  19. #define _ASM
  20. #define _SETJMP_H
  21. #include <bits/setjmp.h>
  22. .global _setjmp
  23. .type _setjmp,%function
  24. _setjmp:
  25. xorl %eax, %eax
  26. movl 4 (%esp), %edx
  27. /* Save registers. */
  28. movl %ebx, (JB_BX*4)(%edx)
  29. movl %esi, (JB_SI*4)(%edx)
  30. movl %edi, (JB_DI*4)(%edx)
  31. leal 4 (%esp), %ecx /* Save SP as it will be after we return. */
  32. movl %ecx, (JB_SP*4)(%edx)
  33. movl 0 (%esp), %ecx /* Save PC we are returning to now. */
  34. movl %ecx, (JB_PC*4)(%edx)
  35. movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */
  36. movl %eax, JB_SIZE(%edx) /* No signal mask set. */
  37. ret
  38. .size _setjmp,.-_setjmp