MdePkg/Library/BaseLib/Ia32/SetJump.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 ;   SetJump.Asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   Implementation of SetJump() on IA-32.
  19 ;
  20 ;------------------------------------------------------------------------------
  21
  22     .386
  23     .model  flat,C
  24     .code
  25
  26 InternalAssertJumpBuffer    PROTO   C
  27
  28 ;------------------------------------------------------------------------------
  29 ; UINTN
  30 ; EFIAPI
  31 ; SetJump (
  32 ;   OUT     BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer
  33 ;   );
  34 ;------------------------------------------------------------------------------
  35 SetJump     PROC
  36     push    DWORD [esp + 4]
  37     call    InternalAssertJumpBuffer    ; To validate JumpBuffer
  38     pop     ecx
  39     pop     ecx                         ; ecx <- return address
  40     mov     edx, [esp]
  41     mov     [edx], ebx
  42     mov     [edx + 4], esi
  43     mov     [edx + 8], edi
  44     mov     [edx + 12], ebp
  45     mov     [edx + 16], esp
  46     mov     [edx + 20], ecx             ; eip value to restore in LongJump
  47     xor     eax, eax
  48     jmp     ecx
  49 SetJump     ENDP
  50
  51     END