RuntimeSmm

Index: 0204
Size: 5,476 bytes (1564h)
Phase: SMM (DXE_SMM_DRIVER)
Source Package: AmiModulePkg\RuntimeSmm\RuntimeSmm.c

Overview

Minimal UEFI SMM runtime driver that bridges boot-time and SMM runtime services. Initializes global pointers to Boot Services, Runtime Services, and System Table; locates the SmmBase2 protocol to obtain the SMM Services Table (gSmst); registers a protocol notification handler for the SMM Runtime Services Table protocol. Uses SetJump/LongJump for error recovery. Has no import table -- all protocol interfaces resolved via LocateProtocol.

Key Functions

• sub_44C -- Initializes gImageHandle, gST, gBS, gRT, locates SmmBase2, retrieves gSmst
• sub_58C -- Main dispatch: SetJump error recovery, calls sub_768 init, cleans up with LongJump
• sub_768 -- Driver init: caches system tables, locates SMM Runtime Services Table protocol, calls its callback, installs protocol handlers
• sub_300 / sub_3A0 -- SetJump/LongJump: saves/restores GP registers, XMM registers, MXCSR into 248-byte buffer
• sub_64C -- Allocates buffer with protocol GUID data, registers via SmmRegisterProtocolNotify
• sub_9F8 / sub_A80 -- Protocol registration for Runtime Services and Status Code in both SMM and boot modes

Protocols

• SmmBase2 protocol (SMM_SERVICES_TABLE_GUID)
• SMM Runtime Services Table protocol
• gEfiStatusCodeRuntimeProtocolGuid (DebugLib)

Platform

HR650X (Purley), built from PurleyPlatformPkg/AmiModulePkg, DEBUG VS2015 X64