;------------------------------------------------------------------------------ ; ; Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.
; SPDX-License-Identifier: BSD-2-Clause-Patent ; ; Abstract: ; ; Switch the stack from temporary memory to permenent memory. ; ;------------------------------------------------------------------------------ .586p .model flat,C .code ;------------------------------------------------------------------------------ ; UINT32 ; EFIAPI ; Pei2LoaderSwitchStack ( ; VOID ; ) ;------------------------------------------------------------------------------ EXTERNDEF C MeasurePoint:PROC Pei2LoaderSwitchStack PROC C PUBLIC xor eax, eax jmp FspSwitchStack Pei2LoaderSwitchStack ENDP ;------------------------------------------------------------------------------ ; UINT32 ; EFIAPI ; Loader2PeiSwitchStack ( ; VOID ; ) ;------------------------------------------------------------------------------ Loader2PeiSwitchStack PROC C PUBLIC jmp FspSwitchStack Loader2PeiSwitchStack ENDP ;------------------------------------------------------------------------------ ; UINT32 ; EFIAPI ; FspSwitchStack ( ; VOID ; ) ;------------------------------------------------------------------------------ EXTERNDEF C SwapStack:PROC FspSwitchStack PROC C PUBLIC ; Save current contexts push eax pushfd cli pushad sub esp, 8 sidt fword ptr [esp] ; Load new stack push esp call SwapStack mov esp, eax ; Restore previous contexts lidt fword ptr [esp] add esp, 8 popad popfd add esp, 4 ret FspSwitchStack ENDP END