A subset of fields in the EFI_SMM_SYSTEM_TABLE2 structure are identical to the fields in the SMM_ENTRY_CONTEXT structure. CopyMem() is used to transfer the contents of the SMM_ENTRY_CONTEXT structure into the EFI_SMM_SYSTEM_TABLE2. This is confusing because SMM_ENTRY_CONTEXT is not used in the declaration of EFI_SMM_SYSTEM_TABLE2 and field contents are transferred without any reference to individual field names (i.e. CurrentlyExecutingCpu). In order to make the code easier to maintain and understand, the CopyMem() is replaced with statements that transfer each field of SMM_ENTRY_CONTEXT into EFI_SMM_SYSTEM_TABLE2.
Reported-by: Laszlo Ersek <[email protected]> Link: http://news.gmane.org/gmane.comp.bios.edk2.devel Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Michael Kinney <[email protected]> --- MdeModulePkg/Core/PiSmmCore/PiSmmCore.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/MdeModulePkg/Core/PiSmmCore/PiSmmCore.c b/MdeModulePkg/Core/PiSmmCore/PiSmmCore.c index 496638a..cc7ccec 100644 --- a/MdeModulePkg/Core/PiSmmCore/PiSmmCore.c +++ b/MdeModulePkg/Core/PiSmmCore/PiSmmCore.c @@ -430,13 +430,17 @@ SmmEntryPoint ( BOOLEAN IsOverlapped; PERF_START (NULL, "SMM", NULL, 0) ; // - // Update SMST using the context + // Update SMST with contents of the SmmEntryContext structure // - CopyMem (&gSmmCoreSmst.SmmStartupThisAp, SmmEntryContext, sizeof (EFI_SMM_ENTRY_CONTEXT)); + gSmmCoreSmst.SmmStartupThisAp = SmmEntryContext->SmmStartupThisAp; + gSmmCoreSmst.CurrentlyExecutingCpu = SmmEntryContext->CurrentlyExecutingCpu; + gSmmCoreSmst.NumberOfCpus = SmmEntryContext->NumberOfCpus; + gSmmCoreSmst.CpuSaveStateSize = SmmEntryContext->CpuSaveStateSize; + gSmmCoreSmst.CpuSaveState = SmmEntryContext->CpuSaveState; // // Call platform hook before Smm Dispatch // PlatformHookBeforeSmmDispatch (); -- 1.9.5.msysgit.1 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
