B.2 Step 2 - Disable Default Extra Action Trigger B.4 Patch
Analyzer User's Guide  /  B Update UEFI For Notification Tracking  / 

B.3 Step 3 - Add Custom Trigger (Read CR3)

As a final step, add reading of CR3 to the extra action library. Reading CR3 be used to trigger a notification that is intercepted by the tracker. Add a call to AsmReadCr3 in PeCoffLoaderExtraActionCommon directly after the call to AsmWriteDr3 in the file:

SourceLevelDebugPkg/Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLib.c

The result end should be similar to: 


AsmWriteDr0 (Signature);
AsmWriteDr1 ((UINTN) ImageContext->PdbPointer);
AsmWriteDr2 ((UINTN) ImageContext);
AsmWriteDr3 (IO_PORT_BREAKPOINT_ADDRESS);
AsmReadCr3 (); # <--- Trigger Simics UEFI Tracker
B.2 Step 2 - Disable Default Extra Action Trigger B.4 Patch