src/ucontext/i386/_setcontext.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 .private_extern __setcontext
  30 LABEL(__setcontext)
  31         movl  4(%esp), %ecx
  32         movl  28(%ecx), %ecx
  33         movl  16(%ecx), %ebx
  34         movl  28(%ecx), %edi
  35         movl  32(%ecx), %esi
  36         movl  36(%ecx), %ebp
  37         movl  40(%ecx), %esp
  38         pushl 48(%ecx)
  39         popfl
  40         movl  12(%ecx), %eax
  41         jmp   *52(%ecx)
  42
  43 #endif /* __i386__ */