sysdeps/x86_64/bits/setjmp.h

   1 /* Copyright (C) 2001, 2002, 2003 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'.  x86-64 version.  */
  20 #ifndef _BITS_SETJMP_H
  21 #define _BITS_SETJMP_H  1
  22
  23 #if !defined _SETJMP_H && !defined _PTHREAD_H
  24 # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
  25 #endif
  26
  27 #include <bits/wordsize.h>
  28
  29 #if __WORDSIZE == 64
  30
  31 /* We only need to save callee-saved registers plus stackpointer and
  32    program counter.  */
  33 # if defined __USE_MISC || defined _ASM
  34 #  define JB_RBX        0
  35 #  define JB_RBP        1
  36 #  define JB_R12        2
  37 #  define JB_R13        3
  38 #  define JB_R14        4
  39 #  define JB_R15        5
  40 #  define JB_RSP        6
  41 #  define JB_PC 7
  42 #  define JB_SIZE (8*8)
  43 # endif
  44
  45 #else
  46
  47 # if defined __USE_MISC || defined _ASM
  48 #  define JB_BX 0
  49 #  define JB_SI 1
  50 #  define JB_DI 2
  51 #  define JB_BP 3
  52 #  define JB_SP 4
  53 #  define JB_PC 5
  54 #  define JB_SIZE 24
  55 # endif
  56
  57 #endif
  58
  59 #ifndef _ASM
  60
  61 # if __WORDSIZE == 64
  62 typedef long int __jmp_buf[8];
  63 # else
  64 typedef int __jmp_buf[6];
  65 # endif
  66
  67 /* Test if longjmp to JMPBUF would unwind the frame
  68    containing a local variable at ADDRESS.  */
  69 # if __WORDSIZE == 64
  70 #  define _JMPBUF_UNWINDS(jmpbuf, address) \
  71   ((void *) (address) < (void *) (jmpbuf)[JB_RSP])
  72 # else
  73 #  define _JMPBUF_UNWINDS(jmpbuf, address) \
  74   ((void *) (address) < (void *) (jmpbuf)[JB_SP])
  75 # endif
  76 #endif
  77
  78 #endif  /* bits/setjmp.h */