arch/x86_64-all/clib/vfork_longjmp.s

   1 /*
   2     Copyright © 1995-2008, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 /* This function works the same as longjmp() except it lacks the argument
   7    check. It's used only by vfork() implementation. */
   8
   9         #include "aros/x86_64/asm.h"
  10
  11         .text
  12         _ALIGNMENT
  13         .globl  AROS_CDEFNAME(vfork_longjmp)
  14         _FUNCTION(AROS_CDEFNAME(vfork_longjmp))
  15
  16         .set    FirstArg, 8 /* Skip Return-Adress */
  17         .set    env, FirstArg
  18         .set    val, env+8
  19         .set    retaddr, 0
  20
  21 AROS_CDEFNAME(vfork_longjmp):
  22     mov %rdi, %rax
  23         /* Restore stack pointer and all registers from env */
  24         mov 120(%rax),%rsp /* Restore original stack */
  25
  26         mov 0(%rax),%rcx
  27         mov %rcx,retaddr(%rsp) /* Restore return address */
  28
  29         push %rsi /* Save return value on new stack */
  30
  31         /* Restore all registers */
  32         mov 8(%rax),%rbx /* %ebx */
  33         mov 16(%rax),%rcx /* %ecx */
  34         mov 24(%rax),%rdx /* %edx */
  35         mov 32(%rax),%rsi /* %esi */
  36         mov 40(%rax),%rdi /* %edi */
  37         mov 48(%rax),%rbp /* %ebp */
  38         mov 56(%rax),%r8
  39         mov 64(%rax),%r9
  40         mov 72(%rax),%r10
  41         mov 80(%rax),%r11
  42         mov 88(%rax),%r12
  43         mov 96(%rax),%r13
  44         mov 104(%rax),%r14
  45         mov 112(%rax),%r15
  46
  47         pop %rax /* Fetch return value */
  48         ret