setjmp.h 1.7 KB

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  1. /* Copyright (C) 1997, 1998, 2007 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
  14. Boston, MA 02110-1301, USA. */
  15. /* Define the machine-dependent type `jmp_buf'. Xtensa version. */
  16. #ifndef _BITS_SETJMP_H
  17. #define _BITS_SETJMP_H 1
  18. #if !defined _SETJMP_H && !defined _PTHREAD_H
  19. # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
  20. #endif
  21. /* The jmp_buf structure for Xtensa holds the following (where "proc"
  22. is the procedure that calls setjmp): 4-12 registers from the window
  23. of proc, the 4 words from the save area at proc's $sp (in case a
  24. subsequent alloca in proc moves $sp), and the return address within
  25. proc. Everything else is saved on the stack in the normal save areas. */
  26. #ifndef _ASM
  27. typedef int __jmp_buf[17];
  28. #endif
  29. #define JB_SP 1
  30. #define JB_PC 16
  31. /* Test if longjmp to JMPBUF would unwind the frame containing a local
  32. variable at ADDRESS. */
  33. #define _JMPBUF_UNWINDS(jmpbuf, address) \
  34. ((void *) (address) < (void *) (jmpbuf)[JB_SP])
  35. #endif /* bits/setjmp.h */