EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/LongJump.asm

   1 ; Copyright (c) 2004, Intel Corporation
   2 ; All rights reserved. This program and the accompanying materials
   3 ; are licensed and made available under the terms and conditions of the BSD License
   4 ; which accompanies this distribution.  The full text of the license may be found at
   5 ; http://opensource.org/licenses/bsd-license.php
   6 ;
   7 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   8 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   9 ;
  10 ; Module Name:
  11 ;
  12 ;   LongJump.Asm
  13 ;
  14 ; Abstract:
  15 ;
  16 ;   Implementation of _LongJump() on IA-32.
  17 ;
  18 ;------------------------------------------------------------------------------
  19
  20     .386
  21     .model  flat,C
  22     .code
  23
  24 ;------------------------------------------------------------------------------
  25 ; VOID
  26 ; EFIAPI
  27 ; InternalLongJump (
  28 ;   IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,
  29 ;   IN      UINTN                     Value
  30 ;   );
  31 ;------------------------------------------------------------------------------
  32 InternalLongJump    PROC
  33     pop     eax                         ; skip return address
  34     pop     edx                         ; edx <- JumpBuffer
  35     pop     eax                         ; eax <- Value
  36     mov     ebx, [edx]
  37     mov     esi, [edx + 4]
  38     mov     edi, [edx + 8]
  39     mov     ebp, [edx + 12]
  40     mov     esp, [edx + 16]
  41     jmp     dword ptr [edx + 20]        ; restore "eip"
  42 InternalLongJump    ENDP
  43
  44     END