sysdeps/m68k/bits/setjmp.h

   1 /* Copyright (C) 1997, 1998 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'.  m68k version.  */
  20
  21 #ifndef _SETJMP_H
  22 # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
  23 #endif
  24
  25 typedef struct
  26   {
  27     /* There are eight 4-byte data registers, but D0 is not saved.  */
  28     long int __dregs[7];
  29
  30     /* There are six 4-byte address registers, plus the FP and SP.  */
  31     int *__aregs[6];
  32     int *__fp;
  33     int *__sp;
  34
  35 #if defined __HAVE_68881__ || defined __HAVE_FPU__
  36     /* There are eight floating point registers which
  37        are saved in IEEE 96-bit extended format.  */
  38     char __fpregs[8 * (96 / 8)];
  39 #endif
  40
  41   } __jmp_buf[1];
  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)->__sp)