mirror of https://github.com/acidanthera/audk.git
75 lines
2.1 KiB
NASM
75 lines
2.1 KiB
NASM
|
;------------------------------------------------------------------------------
|
||
|
|
;
|
||
|
|
; Copyright (c) 2016, 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.
|
||
|
|
;
|
||
|
|
; Abstract:
|
||
|
|
;
|
||
|
|
; Switch the stack from temporary memory to permenent memory.
|
||
|
|
;
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
SECTION .text
|
||
|
|
|
||
|
|
extern ASM_PFX(SwapStack)
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
; UINT32
|
||
|
|
; EFIAPI
|
||
|
|
; Pei2LoaderSwitchStack (
|
||
|
|
; VOID
|
||
|
|
; )
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
global ASM_PFX(Pei2LoaderSwitchStack)
|
||
|
|
ASM_PFX(Pei2LoaderSwitchStack):
|
||
|
|
xor eax, eax
|
||
|
|
jmp ASM_PFX(FspSwitchStack)
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
; UINT32
|
||
|
|
; EFIAPI
|
||
|
|
; Loader2PeiSwitchStack (
|
||
|
|
; VOID
|
||
|
|
; )
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
global ASM_PFX(Loader2PeiSwitchStack)
|
||
|
|
ASM_PFX(Loader2PeiSwitchStack):
|
||
|
|
jmp ASM_PFX(FspSwitchStack)
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
; UINT32
|
||
|
|
; EFIAPI
|
||
|
|
; FspSwitchStack (
|
||
|
|
; VOID
|
||
|
|
; )
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
global ASM_PFX(FspSwitchStack)
|
||
|
|
ASM_PFX(FspSwitchStack):
|
||
|
|
; Save current contexts
|
||
|
|
push eax
|
||
|
|
pushfd
|
||
|
|
cli
|
||
|
|
pushad
|
||
|
|
sub esp, 8
|
||
|
|
sidt [esp]
|
||
|
|
|
||
|
|
; Load new stack
|
||
|
|
push esp
|
||
|
|
call ASM_PFX(SwapStack)
|
||
|
|
mov esp, eax
|
||
|
|
|
||
|
|
; Restore previous contexts
|
||
|
|
lidt [esp]
|
||
|
|
add esp, 8
|
||
|
|
popad
|
||
|
|
popfd
|
||
|
|
add esp, 4
|
||
|
|
ret
|
||
|
|
|