setjmp.h 1.9 KB

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  1. /* Copyright (C) 1997, 1998, 2000 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'. PowerPC version. */
  16. #ifndef _SETJMP_H
  17. # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
  18. #endif
  19. /* The previous bits/setjmp.h had __jmp_buf defined as a structure.
  20. We use an array of 'long int' instead, to make writing the
  21. assembler easier. Naturally, user code should not depend on
  22. either representation. */
  23. #if defined __USE_MISC || defined _ASM
  24. # define JB_GPR1 0 /* Also known as the stack pointer */
  25. # define JB_GPR2 1
  26. # define JB_LR 2 /* The address we will return to */
  27. # define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18 in total */
  28. # define JB_CR 21 /* Condition code registers. */
  29. # define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total */
  30. # define JB_SIZE (58*4)
  31. #endif
  32. #ifndef _ASM
  33. typedef long int __jmp_buf[58];
  34. #endif
  35. /* Test if longjmp to JMPBUF would unwind the frame
  36. containing a local variable at ADDRESS. */
  37. #define _JMPBUF_UNWINDS(jmpbuf, address) \
  38. ((void *) (address) < (void *) (jmpbuf)[JB_GPR1])