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authorli-elvin <li-elvin@6f19259b-4bc3-4df7-8a09-765794883524>2011-10-18 02:42:34 +0000
committerli-elvin <li-elvin@6f19259b-4bc3-4df7-8a09-765794883524>2011-10-18 02:42:34 +0000
commit515327a3e3f39f201da09a4916e8c820a104c3c4 (patch)
tree2382b7f3ff3fcfd39e305e9f566b985527a57d5d /EdkCompatibilityPkg/Foundation/Library/Thunk16
parentd6c06dd77645c84654c51d5aa3582aaa241c429c (diff)
downloadedk2-platforms-515327a3e3f39f201da09a4916e8c820a104c3c4.tar.xz
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
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/Thunk16')
-rw-r--r--EdkCompatibilityPkg/Foundation/Library/Thunk16/X86Thunk.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/Thunk16/X86Thunk.c b/EdkCompatibilityPkg/Foundation/Library/Thunk16/X86Thunk.c
index ed24663b48..7f562cf484 100644
--- a/EdkCompatibilityPkg/Foundation/Library/Thunk16/X86Thunk.c
+++ b/EdkCompatibilityPkg/Foundation/Library/Thunk16/X86Thunk.c
@@ -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
@@ -381,8 +381,15 @@ Returns:
--*/
{
- RegisterSet->E.EIP = (UINT16)((UINT32 *)NULL)[IntNumber];
- RegisterSet->E.CS = (UINT16)(((UINT32 *)NULL)[IntNumber] >> 16);
+ UINT32 *VectorBase;
+
+ //
+ // 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);
}