i386/gen/getcontext.S

   1 /*
   2  * Copyright (c) 2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #if defined(__i386__)
  25
  26 #include <architecture/i386/asm_help.h>
  27
  28 TEXT
  29 LABEL(_getcontext)
  30         subl  $28, %esp
  31         movl  32(%esp), %eax
  32         movl  %eax,   (%esp)
  33         movl  %esp,  4(%esp)
  34         CALL_EXTERN(_getmcontext)
  35         movl  %eax, %ecx
  36         addl  $28, %esp
  37         movl  %ebx, 16(%ecx)
  38         movl  %edi, 28(%ecx)
  39         movl  %esi, 32(%ecx)
  40         movl  %ebp, 36(%ecx)
  41         movl  (%esp), %eax
  42         movl  %eax, 52(%ecx)
  43         movl  %esp, %eax
  44         addl  $4, %eax
  45         movl  %eax, 40(%ecx)
  46         pushf
  47         popl  %eax
  48         movl  %eax, 48(%ecx)
  49         xorl  %eax, %eax
  50         movl  %eax, 12(%ecx)
  51         ret
  52
  53 #endif /* __i386__ */