MdePkg/BaseLib: Support IA32 processors without CLFLUSH

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / SetJump.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r
; This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution.  The full text of the license may be found at\r
; http://opensource.org/licenses/bsd-license.php.\r
;\r
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
;\r
; Module Name:\r
;\r
;   SetJump.Asm\r
;\r
; Abstract:\r
;\r
;   Implementation of SetJump() on IA-32.\r
;\r
;------------------------------------------------------------------------------\r
\r
    .386\r
    .model  flat,C\r
    .code\r
\r
InternalAssertJumpBuffer    PROTO   C\r
\r
;------------------------------------------------------------------------------\r
; UINTN\r
; EFIAPI\r
; SetJump (\r
;   OUT     BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer\r
;   );\r
;------------------------------------------------------------------------------\r
SetJump     PROC\r
    push    [esp + 4]\r
    call    InternalAssertJumpBuffer    ; To validate JumpBuffer\r
    pop     ecx\r
    pop     ecx                         ; ecx <- return address\r
    mov     edx, [esp]\r
    mov     [edx], ebx\r
    mov     [edx + 4], esi\r
    mov     [edx + 8], edi\r
    mov     [edx + 12], ebp\r
    mov     [edx + 16], esp\r
    mov     [edx + 20], ecx             ; eip value to restore in LongJump\r
    xor     eax, eax\r
    jmp     ecx\r
SetJump     ENDP\r
\r
    END\r