VerifyFwBootGuard

Overview

Firmware Boot Guard Verification DXE Driver. Validates Intel Boot Guard (also known as Boot Guard ACM) verification status during DXE initialization. A single-function module that reads Boot Guard verification results and takes appropriate action if verification fails (e.g., logging errors, asserting, or halting boot). Intel Boot Guard is a hardware-protected boot integrity mechanism that verifies the initialization code (IBB) before it executes.

Key Functions

• ModuleEntryPoint (0x490): UEFI driver entry point; calls sub_4CC for preliminary initialization, sub_788 for Boot Guard verification, and sub_1170 for error handling on failure.

Dependencies

• Boot Guard hardware status registers: Accessed via MMIO or platform-specific interfaces
• Intel Boot Guard ACM: Boot Guard Authenticated Code Module verification status
• UEFI Boot Services: Protocol and event management
• Related modules: BootGuardPei

Platform

Intel Purley (HR650X server platform), x86-64, PE32+ format, 5 sections (.text, .rdata, .data, section_3, .xdata)