1  /* Copyright (C) 1997-2023 Free Software Foundation, Inc.
       2  
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public License as
       7     published by the Free Software Foundation; either version 2.1 of the
       8     License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  /* Define the machine-dependent type `jmp_buf'.  */
      20  
      21  #ifndef _BITS_SETJMP_H
      22  # define _BITS_SETJMP_H 1
      23  
      24  #if !defined _SETJMP_H && !defined _PTHREAD_H
      25  # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
      26  #endif
      27  
      28  typedef struct __jmp_buf_internal_tag
      29    {
      30      /* There are 21 4-byte registers that should be saved:
      31         r1, r2, r13-r31. Actually, there seems no need to save
      32         r14, r16, r17, r18 (return addresses for interrupt/exception/trap).  */
      33      int *__sp; /* dedicated name for r1.  */
      34      long int __gregs[20];
      35    } __jmp_buf[1];
      36  
      37  #endif