EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/SetJump.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 ;   SetJump.Asm
  13 ;
  14 ; Abstract:
  15 ;
  16 ;   Implementation of SetJump() on IA-32.
  17 ;
  18 ;------------------------------------------------------------------------------
  19
  20     .386
  21     .model  flat,C
  22     .code
  23
  24 InternalAssertJumpBuffer    PROTO   C
  25
  26 ;------------------------------------------------------------------------------
  27 ; UINTN
  28 ; EFIAPI
  29 ; SetJump (
  30 ;   OUT     BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer
  31 ;   );
  32 ;------------------------------------------------------------------------------
  33 SetJump     PROC
  34     push    [esp + 4]
  35     call    InternalAssertJumpBuffer    ; To validate JumpBuffer
  36     pop     ecx
  37     pop     ecx                         ; ecx <- return address
  38     mov     edx, [esp]
  39     mov     [edx], ebx
  40     mov     [edx + 4], esi
  41     mov     [edx + 8], edi
  42     mov     [edx + 12], ebp
  43     mov     [edx + 16], esp
  44     mov     [edx + 20], ecx             ; eip value to restore in LongJump
  45     xor     eax, eax
  46     jmp     ecx
  47 SetJump     ENDP
  48
  49     END