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The PeriodicSmiDispatchFunction() in SmmPeriodicSmiLib may assert with "Bad CR signature". Currently, the SetActivePeriodicSmiLibraryHandler() function (invoked at the beginning of the PeriodicSmiDispatchFunction() function) attempts to locate the PERIODIC_SMI_LIBRARY_HANDLER_CONTEXT structure pointer for the current periodic SMI from a given EFI_SMM_PERIODIC_TIMER_REGISTER_CONTEXT (RegiserContext) structure pointer (using the CR macro). The RegisterContext structure pointer passed to the PeriodicSmiDispatchFunction() is assumed to point to the same RegisterContext structure address given to the SmmPeriodicTimerDispatch2 protocol Register() API in PeriodicSmiEnable(). However, certain SmmPeriodicTimerDispatch2 implementation may copy the RegisterContext to a local buffer and pass that address as the context to PeriodicSmiDispatchFunction() in which case usage of the CR macro to find the parent structure base fails. The patch uses the LookupPeriodicSmiLibraryHandler() function to find the PERIODIC_SMI_LIBRARY_HANDLER_CONTEXT structure pointer. This works even in this scenario since the DispatchHandle returned from the SmmPeriodicTimerDispatch2 Register() function uniquely identifies that registration. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
EDK II Project
A modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications from www.uefi.org.
Contributions to the EDK II open source project are covered by the TianoCore Contribution Agreement 1.1
The majority of the content in the EDK II open source project uses a BSD 2-Clause License. The EDK II open source project contains the following components that are covered by additional licenses:
- AppPkg/Applications/Python/Python-2.7.2/Tools/pybench
- AppPkg/Applications/Python/Python-2.7.2
- AppPkg/Applications/Python/Python-2.7.10
- BaseTools/Source/C/BrotliCompress
- MdeModulePkg/Library/BrotliCustomDecompressLib
- OvmfPkg
- CryptoPkg/Library/OpensslLib/openssl
The EDK II Project is composed of packages. The maintainers for each package are listed in Maintainers.txt.