audk/IntelFspPkg/Include/Library/FspSwitchStackLib.h

46 lines
1.3 KiB
C
Raw Normal View History

/** @file
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _FSP_SWITCH_STACK_LIB_H_
#define _FSP_SWITCH_STACK_LIB_H_
/**
This funciton will switch the current stack to the previous saved stack.
Before calling the previous stack has to be set in FSP_GLOBAL_DATA.CoreStack.
EIP
FLAGS 16 bit FLAGS 16 bit
EDI
ESI
EBP
ESP
EBX
EDX
ECX
EAX
DWORD IDT base1
StackPointer: DWORD IDT base2
@return ReturnKey After switching to the saved stack,
this value will be saved in eax before returning.
**/
UINT32
EFIAPI
Pei2LoaderSwitchStack (
VOID
);
#endif