The background is :
The SmmMemoryAllocationLib of one of the instance of MemoryAllocation library class. As in MdePkg comment for AllocatePool() : “If AllocationSize is 0, then a valid buffer of 0 size is returned.”,the SMM library implements AllocatePool by SMST service SmmAllocatePool which does NOT support the zero size.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10171 6f19259b-4bc3-4df7-8a09-765794883524
1. Update PiSmmIpl.c DoCommunicate() to prevent exception in case call SmiManage directly if SMRAM is closed or locked. That case causes exception.
2. Update PiSmmCore.c SmmEntryPoint(). It is not required to save/restore InSmm. Because SMM is non-reentrant.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10131 6f19259b-4bc3-4df7-8a09-765794883524