Revision: 17468
http://sourceforge.net/p/edk2/code/17468
Author: lzeng14
Date: 2015-05-19 01:33:25 +0000 (Tue, 19 May 2015)
Log Message:
-----------
SecurityPkg Variable: Prevent BS variable update in legacy OS runtime.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <[email protected]>
Reviewed-by: Jiewen Yao <[email protected]>
Reviewed-by: Liming Gao <[email protected]>
Modified Paths:
--------------
trunk/edk2/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c
Modified:
trunk/edk2/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c
===================================================================
---
trunk/edk2/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c
2015-05-19 01:32:52 UTC (rev 17467)
+++
trunk/edk2/SecurityPkg/VariableAuthenticated/RuntimeDxe/VariableSmmRuntimeDxe.c
2015-05-19 01:33:25 UTC (rev 17468)
@@ -1019,6 +1019,7 @@
VOID *SmmVariableWriteRegistration;
EFI_EVENT OnReadyToBootEvent;
EFI_EVENT ExitBootServiceEvent;
+ EFI_EVENT LegacyBootEvent;
EfiInitializeLock (&mVariableServicesLock, TPL_NOTIFY);
@@ -1087,6 +1088,17 @@
);
//
+ // Register the event to inform SMM variable that it is at runtime for
legacy boot.
+ // Reuse OnExitBootServices() here.
+ //
+ EfiCreateEventLegacyBootEx(
+ TPL_NOTIFY,
+ OnExitBootServices,
+ NULL,
+ &LegacyBootEvent
+ );
+
+ //
// Register the event to convert the pointer for runtime.
//
gBS->CreateEventEx (
------------------------------------------------------------------------------
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