uclibc-ng/libc/sysdeps/linux/x86_64/jmpbuf-offsets.h

/* Private macros for accessing __jmp_buf contents.  x86-64 version.
   Copyright (C) 2006 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, see
   <http://www.gnu.org/licenses/>.  */

#include <bits/wordsize.h>

#if __WORDSIZE == 64

/* We only need to save callee-saved registers plus stackpointer and
   program counter.  */
# define JB_RBX	0
# define JB_RBP	1
# define JB_R12	2
# define JB_R13	3
# define JB_R14	4
# define JB_R15	5
# define JB_RSP	6
# define JB_PC	7
# define JB_SIZE (8*8)

#else

# define JB_BX	0
# define JB_SI	1
# define JB_DI	2
# define JB_BP	3
# define JB_SP	4
# define JB_PC	5
# define JB_SIZE 24

#endif