ports/sysdeps/hppa/bits/setjmp.h

   1 /* Copyright (C) 2000-2014 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 /* Define the machine-dependent type `jmp_buf'.  HPPA version.  */
  19 #ifndef _BITS_SETJMP_H
  20 #define _BITS_SETJMP_H  1
  21
  22 #if !defined _SETJMP_H && !defined _PTHREAD_H
  23 # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
  24 #endif
  25
  26 #ifndef _ASM
  27 /* The entire jump buffer must be 168 bytes long and laid
  28    out in exactly as follows for ABI consistency.
  29    * 20 x 32-bit gprs, with 8-bytes of padding, arranged so:
  30      - r3 (callee saves)
  31      - 4 bytes of padding.
  32      - r4-r18 (callee saves)
  33      - r19 (PIC register)
  34      - r27 (static link register)
  35      - r30 (stcack pointer)
  36      - r2 (return pointer)
  37      - 4 bytes of padding.
  38    * 10 x 64-bit fprs in this order:
  39      - fr12-fr21 (callee saves)
  40    Note: We have 8 bytes of free space for future uses.  */
  41 typedef union
  42   {
  43     struct __jmp_buf_internal_tag
  44       {
  45         int __r3;
  46         int __pad0;
  47         int __r4_r18[15];
  48         int __r19;
  49         int __r27;
  50         int __sp;
  51         int __rp;
  52         int __pad1;
  53         double __fr12_fr21[10];
  54       } __jmp_buf;
  55     /* Legacy definition. Ensures double alignment for fpsrs.  */
  56     double __align[21];
  57   } __jmp_buf[1];
  58 #endif
  59
  60 #endif  /* bits/setjmp.h */