diff options
| author | li-elvin <li-elvin@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-11-12 07:47:27 +0000 |
|---|---|---|
| committer | li-elvin <li-elvin@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-11-12 07:47:27 +0000 |
| commit | 4d4c535a329a605ec4ea2a39dbfceef443afe4a7 (patch) | |
| tree | b5222a0fda27db433d5325a93c93cf20055a57d0 /MdePkg/Library/BaseLib/X64 | |
| parent | be3b67bca5dfd62cea1148470554f6628efb9b7b (diff) | |
| download | edk2-platforms-4d4c535a329a605ec4ea2a39dbfceef443afe4a7.tar.xz | |
Fix the issue that the high 16-bit of EAX may contain invalid data, which cause bad stack pointer, the change will ensure the high 16-bit of EAX is cleared.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11047 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/X64')
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/Thunk16.S | 4 | ||||
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/Thunk16.asm | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/MdePkg/Library/BaseLib/X64/Thunk16.S b/MdePkg/Library/BaseLib/X64/Thunk16.S index fa9b3d6035..049ec86355 100644 --- a/MdePkg/Library/BaseLib/X64/Thunk16.S +++ b/MdePkg/Library/BaseLib/X64/Thunk16.S @@ -1,6 +1,6 @@ #------------------------------------------------------------------------------
#
-# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2006 - 2010, 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
@@ -104,7 +104,7 @@ L_1: orb $2,%al
outb %al, $0x92 # deactivate A20M#
L_2:
- movl %ss,%eax
+ movw %ss,%ax
lea IA32_REGS_SIZE(%esp), %bp
#
# rsi in the following 2 instructions is indeed bp in 16-bit code
diff --git a/MdePkg/Library/BaseLib/X64/Thunk16.asm b/MdePkg/Library/BaseLib/X64/Thunk16.asm index 459966a43f..829df1c2a0 100644 --- a/MdePkg/Library/BaseLib/X64/Thunk16.asm +++ b/MdePkg/Library/BaseLib/X64/Thunk16.asm @@ -3,7 +3,7 @@ ;------------------------------------------------------------------------------
;
-; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2006 - 2010, 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 +105,7 @@ _ThunkAttr DD ? or al, 2
out 92h, al ; deactivate A20M#
@2:
- 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
|