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Use a local variable and assign 0 to it, then use it as legacy interrupt table base address. 

Signed-off-by: li-elvin
Reviewed-by: mdkinney, ydong10

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12544 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
li-elvin 2011-10-18 02:42:34 +00:00
parent d6c06dd776
commit 515327a3e3
1 changed files with 10 additions and 3 deletions
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13
EdkCompatibilityPkg/Foundation/Library/Thunk16/X86Thunk.c
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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 This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License 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 which accompanies this distribution. The full text of the license may be found at
@ -381,8 +381,15 @@ Returns:
--*/ --*/
{ {
RegisterSet->E.EIP = (UINT16)((UINT32 *)NULL)[IntNumber]; UINT32 *VectorBase;
RegisterSet->E.CS = (UINT16)(((UINT32 *)NULL)[IntNumber] >> 16);
//
// The base address of legacy interrupt vector table is 0.
// We use this base address to get the legacy interrupt handler.
//
VectorBase = 0;
RegisterSet->E.EIP = (UINT16)(VectorBase)[IntNumber];
RegisterSet->E.CS = (UINT16)((VectorBase)[IntNumber] >> 16);
return AsmThunk16 (ThunkContext, RegisterSet, Flags | THUNK_INTERRUPT); return AsmThunk16 (ThunkContext, RegisterSet, Flags | THUNK_INTERRUPT);
} }