sysdeps/x86_64/__longjmp.S

   1 /* Copyright (C) 2001 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 #include <sysdep.h>
  20 #define _ASM
  21 #define _SETJMP_H
  22 #include <bits/setjmp.h>
  23 #include <asm-syntax.h>
  24
  25 /* Jump to the position specified by ENV, causing the
  26    setjmp call there to return VAL, or 1 if VAL is 0.
  27    void __longjmp (__jmp_buf env, int val).  */
  28 ENTRY(__longjmp)
  29         /* Restore registers.  */
  30         movq (JB_RBX*8)(%rdi),%rbx
  31         movq (JB_RBP*8)(%rdi),%rbp
  32         movq (JB_R12*8)(%rdi),%r12
  33         movq (JB_R13*8)(%rdi),%r13
  34         movq (JB_R14*8)(%rdi),%r14
  35         movq (JB_R15*8)(%rdi),%r15
  36         /* Set return value for setjmp.  */
  37         test %esi,%esi
  38         mov $01,%eax
  39         cmove %eax,%esi
  40         mov %esi, %eax
  41         movq (JB_PC*8)(%rdi),%rdx
  42         movq (JB_RSP*8)(%rdi),%rsp
  43         jmpq *%rdx
  44 END (BP_SYM (__longjmp))