sysdeps/hppa/bits/setjmp.h

   1 /* Copyright (C) 2000 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'.  HPPA 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 'double' instead, to make writing the assembler
  27    easier, and to ensure proper alignment. Naturally, user code should
  28    not depend on either representation. */
  29
  30 #if defined __USE_MISC || defined _ASM
  31 #define JB_SP (76/4)
  32 #endif
  33
  34 #ifndef _ASM
  35 typedef double __jmp_buf[21];
  36 #endif
  37
  38 /* Test if longjmp to JMPBUF would unwind the frame containing a local
  39    variable at ADDRESS.  */
  40 #define _JMPBUF_UNWINDS(_jmpbuf, _address)                              \
  41      ((void *)(_address) > (void *)(((unsigned long *) _jmpbuf)[JB_SP]))