setjmp.h 1.6 KB

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  1. /* Copyright (C) 1997, 1998 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., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. /* Define the machine-dependent type `jmp_buf'. m68k version. */
  16. #ifndef _SETJMP_H
  17. # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
  18. #endif
  19. typedef struct
  20. {
  21. /* There are eight 4-byte data registers, but D0 is not saved. */
  22. long int __dregs[7];
  23. /* There are six 4-byte address registers, plus the FP and SP. */
  24. int *__aregs[6];
  25. int *__fp;
  26. int *__sp;
  27. #if defined __HAVE_68881__ || defined __HAVE_FPU__
  28. /* There are eight floating point registers which
  29. are saved in IEEE 96-bit extended format. */
  30. char __fpregs[8 * (96 / 8)];
  31. #endif
  32. } __jmp_buf[1];
  33. /* Test if longjmp to JMPBUF would unwind the frame
  34. containing a local variable at ADDRESS. */
  35. #define _JMPBUF_UNWINDS(jmpbuf, address) \
  36. ((void *) (address) < (void *) (jmpbuf)->__sp)