sysdeps/i386/__longjmp.S

   1 /* longjmp for i386.
   2 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   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 Library General Public License as
   7 published by the Free Software Foundation; either version 2 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 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #include <sysdep.h>
  21 #define _ASM
  22 #include <jmp_buf.h>
  23
  24 ENTRY (__longjmp)
  25         movl 4(%esp), %ecx      /* User's jmp_buf in %ecx.  */
  26         movl 8(%esp), %eax      /* Second argument is return value.  */
  27         /* Restore registers.  */
  28         movl (JB_BX*4)(%ecx), %ebx
  29         movl (JB_SI*4)(%ecx), %esi
  30         movl (JB_DI*4)(%ecx), %edi
  31         movl (JB_BP*4)(%ecx), %ebp
  32         movl (JB_SP*4)(%ecx), %esp
  33         /* Jump to saved PC.  */
  34         movl (JB_PC*4)(%ecx), %ecx
  35         jmp *%ecx
  36 PSEUDO_END (__longjmp)