MdePkg/Library/BaseLib/Ia32/LongJump.c

   1 /** @file
   2   Implementation of _LongJump() on IA-32.
   3
   4   Copyright (c) 2006, Intel Corporation<BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #if _MSC_EXTENSIONS
  16
  17 __declspec (naked)
  18 VOID
  19 EFIAPI
  20 InternalLongJump (
  21   IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,
  22   IN      UINTN                     Value
  23   )
  24 {
  25   _asm {
  26     pop     eax                         ; skip return address
  27     pop     edx                         ; edx <- JumpBuffer
  28     pop     eax                         ; eax <- Value
  29     mov     ebx, [edx]
  30     mov     esi, [edx + 4]
  31     mov     edi, [edx + 8]
  32     mov     ebp, [edx + 12]
  33     mov     esp, [edx + 16]
  34     jmp     dword ptr [edx + 20]
  35   }
  36 }
  37
  38 #endif