sysdeps/unix/sysv/aix/bits/setjmp.h

   1 /* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   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
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /* Define the machine-dependent type `jmp_buf'.  PowerPC version.  */
  20
  21 #ifndef _SETJMP_H
  22 # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
  23 #endif
  24
  25 /* The previous bits/setjmp.h had __jmp_buf defined as a structure.
  26    We use an array of 'long int' instead, to make writing the
  27    assembler easier. Naturally, user code should not depend on
  28    either representation. */
  29
  30 #if defined __USE_MISC || defined _ASM
  31 # define JB_GPR1   0  /* Also known as the stack pointer */
  32 # define JB_GPR2   1
  33 # define JB_LR     2  /* The address we will return to */
  34 # define JB_GPRS   3  /* GPRs 14 through 31 are saved, 18 in total */
  35 # define JB_CR     21 /* Condition code registers. */
  36 # define JB_FPRS   22 /* FPRs 14 through 31 are saved, 18*2 words total */
  37 #endif
  38
  39 #ifndef _ASM
  40 typedef long int __jmp_buf[64];
  41 #endif
  42
  43 /* Test if longjmp to JMPBUF would unwind the frame
  44    containing a local variable at ADDRESS.  */
  45 #define _JMPBUF_UNWINDS(jmpbuf, address) \
  46   ((void *) (address) < (void *) (jmpbuf)[JB_GPR1])