MdePkg/Library/BaseLib/Ia32/LongJump.c

   1 /** @file
   2   Implementation of _LongJump() on IA-32.
   3
   4   Copyright (c) 2006 - 2007, 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 //
  16 // Include common header file for this module.
  17 //
  18 #include <BaseLibInternals.h>
  19
  20
  21 __declspec (naked)
  22 VOID
  23 EFIAPI
  24 InternalLongJump (
  25   IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,
  26   IN      UINTN                     Value
  27   )
  28 {
  29   _asm {
  30     pop     eax                         ; skip return address
  31     pop     edx                         ; edx <- JumpBuffer
  32     pop     eax                         ; eax <- Value
  33     mov     ebx, [edx]
  34     mov     esi, [edx + 4]
  35     mov     edi, [edx + 8]
  36     mov     ebp, [edx + 12]
  37     mov     esp, [edx + 16]
  38     jmp     dword ptr [edx + 20]
  39   }
  40 }
  41