sravan/system76-edk2
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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.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11048 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
li-elvin
2010-11-12 07:48:32 +00:00
parent 4d4c535a32
commit 13f06a56bf
2 changed files with 4 additions and 4 deletions
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4
UnixPkg/Library/UnixBaseLib/X64/Thunk16.S
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@@ -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