MdePkg/Library/BaseLib/Ia32/LongJump.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   4 ; This program and the accompanying materials
   5 ; are licensed and made available under the terms and conditions of the BSD License
   6 ; which accompanies this distribution.  The full text of the license may be found at
   7 ; http://opensource.org/licenses/bsd-license.php.
   8 ;
   9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 ;
  12 ; Module Name:
  13 ;
  14 ;   LongJump.Asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   Implementation of _LongJump() on IA-32.
  19 ;
  20 ;------------------------------------------------------------------------------
  21
  22     .386
  23     .model  flat,C
  24     .code
  25
  26 ;------------------------------------------------------------------------------
  27 ; VOID
  28 ; EFIAPI
  29 ; InternalLongJump (
  30 ;   IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,
  31 ;   IN      UINTN                     Value
  32 ;   );
  33 ;------------------------------------------------------------------------------
  34 InternalLongJump    PROC
  35     pop     eax                         ; skip return address
  36     pop     edx                         ; edx <- JumpBuffer
  37     pop     eax                         ; eax <- Value
  38     mov     ebx, [edx]
  39     mov     esi, [edx + 4]
  40     mov     edi, [edx + 8]
  41     mov     ebp, [edx + 12]
  42     mov     esp, [edx + 16]
  43     jmp     dword ptr [edx + 20]        ; restore "eip"
  44 InternalLongJump    ENDP
  45
  46     END