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Fix the issue to clear the high 16-bit of EAX before use it Thunk code. 

This patch updates MdePkg BaseLib, EcpPkg EdkIIGlueLib BaseLib and ThunkLib.

Signed-off-by: lgao4
Reviewed-by: rsun3

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12876 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
lgao4 2011-12-15 08:27:17 +00:00
parent cb40609c75
commit c577049aaf
4 changed files with 12 additions and 8 deletions
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5
MdePkg/Library/BaseLib/Ia32/Thunk16.S
View File

@ -1,6 +1,6 @@
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2006 - 2011, 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
@ -55,7 +55,8 @@ ASM_PFX(ThunkAttr): .space 4
orb $2, %al
outb %al, $0x92 # deactivate A20M#
2:
movw %ss, %ax
xorw %ax, %ax # xor eax, eax
movl %ss, %eax # mov ax, ss
.byte 0x67, 0x66, 0x8d, 0x6c, 0x24, 0x34, 0x66
mov %ebp, 0xffffffd8(%esi)
mov 0xfffffff8(%esi), %ebx

5
MdePkg/Library/BaseLib/Ia32/Thunk16.asm
View File

@ -3,7 +3,7 @@
;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
; Copyright (c) 2006 - 2011, 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
@ -109,7 +109,8 @@ _ThunkAttr DD ?
or al, 2
out 92h, al ; deactivate A20M#
@2:
mov ax, ss
xor ax, ax ; xor eax, eax
mov eax, ss ; mov ax, ss
DB 67h
lea bp, [esp + sizeof (IA32_REGS)]
;

5
MdePkg/Library/BaseLib/X64/Thunk16.S
View File

@ -1,6 +1,6 @@
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2006 - 2011, 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
@ -109,7 +109,8 @@ L_1:
orb $2,%al
outb %al, $0x92 # deactivate A20M#
L_2:
movw %ss,%ax
xorw %ax, %ax # xor eax, eax
movl %ss, %eax # mov ax, ss
lea IA32_REGS_SIZE(%esp), %bp
#
# rsi in the following 2 instructions is indeed bp in 16-bit code

5
MdePkg/Library/BaseLib/X64/Thunk16.asm
View File

@ -3,7 +3,7 @@
;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
; Copyright (c) 2006 - 2011, 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
@ -105,7 +105,8 @@ _ThunkAttr DD ?
or al, 2
out 92h, al ; deactivate A20M#
@2:
mov ax, ss
xor ax, ax ; xor eax, eax
mov eax, ss ; mov ax, ss
lea bp, [esp + sizeof (IA32_REGS)]
;
; rsi in the following 2 instructions is indeed bp in 16-bit code