glibc/sysdeps/powerpc/bits/setjmp.h

/* Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

/* Define the machine-dependent type `jmp_buf'.  PowerPC version.  */

#ifndef _SETJMP_H
# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
#endif

/* The previous bits/setjmp.h had __jmp_buf defined as a structure.
   We use an array of 'long int' instead, to make writing the
   assembler easier. Naturally, user code should not depend on
   either representation. */

#if defined __USE_MISC || defined _ASM
# define JB_GPR1   0  /* Also known as the stack pointer */
# define JB_GPR2   1
# define JB_LR     2  /* The address we will return to */
# if __WORDSIZE == 64
#  define JB_GPRS   3  /* GPRs 14 through 31 are saved, 18*2 words total.  */
#  define JB_CR     21 /* Condition code registers. */
#  define JB_FPRS   22 /* FPRs 14 through 31 are saved, 18*2 words total.  */
#  define JB_SIZE   (40*8)
# else
#  define JB_GPRS   3  /* GPRs 14 through 31 are saved, 18 in total.  */
#  define JB_CR     21 /* Condition code registers.  */
#  define JB_FPRS   22 /* FPRs 14 through 31 are saved, 18*2 words total.  */
#  define JB_SIZE   (58*4)
# endif 
#endif

#ifndef	_ASM
# if __WORDSIZE == 64
typedef long int __jmp_buf[40];
# else
typedef long int __jmp_buf[58];
# endif
#endif

/* Test if longjmp to JMPBUF would unwind the frame
   containing a local variable at ADDRESS.  */
#define _JMPBUF_UNWINDS(jmpbuf, address) \
  ((void *) (address) < (void *) (jmpbuf)[JB_GPR1])