diff options
| author | lgao4 <lgao4@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-12-15 08:27:17 +0000 |
|---|---|---|
| committer | lgao4 <lgao4@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-12-15 08:27:17 +0000 |
| commit | c577049aafd5d00f96fe6d136e442da8b7520242 (patch) | |
| tree | 90aa447ee6129b3a136651c71c557b1824eea952 /MdePkg/Library/BaseLib/Ia32/Thunk16.S | |
| parent | cb40609c754e8ddd351b8f01a60f8097ed0b82dc (diff) | |
| download | edk2-platforms-c577049aafd5d00f96fe6d136e442da8b7520242.tar.xz | |
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
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/Thunk16.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/Thunk16.S | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/Thunk16.S b/MdePkg/Library/BaseLib/Ia32/Thunk16.S index df205e9a19..d45a0d40b1 100644 --- a/MdePkg/Library/BaseLib/Ia32/Thunk16.S +++ b/MdePkg/Library/BaseLib/Ia32/Thunk16.S @@ -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
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