_FIRMWARE_INFORMATION_LOADER_BLOCK

//0x20 bytes (sizeof) struct _FIRMWARE_INFORMATION_LOADER_BLOCK { ULONG FirmwareTypeEfi:1; //0x0 ULONG Reserved:31; //0x0 union { struct _EFI_FIRMWARE_INFORMATION EfiInformation; //0x8 struct _PCAT_FIRMWARE_INFORMATION PcatInformation; //0x8 } u; //0x8 };