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

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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/X64/Thunk16.S
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@@ -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