UbaConfigDatabaseDxe

Function Table

Address	Name	Description
	UbaConfigDatabaseGetInfo
	UbaConfigDatabaseSetData
	UbaConfigDatabaseGetData
	ReadUnaligned64
	AssertPrint
	DebugPrint
	InternalBaseLibIsListValid
	AsciiStrLen
	AsciiStrnLenS
	UbaConfigDatabaseGetListNode
	UbaConfigDatabaseNodeInit
	CompareGuid
	AsciiStrCpyS
	AsciiStrnCpyS
	UbaConfigDatabaseDxeEntry
	UbaConfigDatabaseInstallDriver
	UbaConfigDatabaseLoadFromHob
	UbaConfigDatabaseSetDataDispatch
	UbaConfigDatabaseGetDataDispatch
	UbaConfigDatabaseFindData
	ModuleEntryPoint
Include	UEFI types
typedef	unsigned long long UINT64;
EFI_STATUS	codes
EFI_GUID	structure (16 bytes)
typedef	struct {
EFI_SYSTEM_TABLE	(abbreviated for this module)
0x00	- 0x5F: header, firmware vendor, etc.
0x60	*VOID RuntimeServices; // 0x68**
EFI_BOOT_SERVICES	(function table at offset 0x60 from SystemTable)
Only	the entries used by this module are defined.
0x00	- 0x17: RaiseTPL, RestoreTPL, AllocatePages, FreePages
0x18	*UINT64 (AllocatePool)(UINTN PoolType, UINTN Size, VOID Buffer); // 0x20 (index 4)
0x28	char _pad1[0x18]; // 0x30 - 0x47
0x48	(index 9)
0x50	- 0x87
0x88	(index 17)
0x90	- 0xD7
0xD8	(index 27)
0xE0	- 0xFF
EFI_RUNTIME_SERVICES	(function table at offset 0x68 from SystemTable)
LIST_ENTRY	- standard UEFI doubly-linked list
typedef	struct _LIST_ENTRY {
UBA_CONFIG_NODE	- a single configuration data node in the linked list
Structure	layout:
0x04	LIST_ENTRY Link; // 0x08
0x18	EFI_GUID ConfigGuid; // 0x1C
0x2C	UINT32 ConfigDataSize; // 0x3C
0x40	UINT32 NodeCount; // 0x48
UBA_CONFIG_DATABASE_PRIVATE	- private structure for the config database
0x08	UINT64 ConfigCount; // 0x10
0x18	EFI_GUID ConfigGuid; // 0x1C
Protocol	interface starts here
0x2C	*EFI_STATUS (SetData)(VOID* This, EFI_GUID ConfigGuid, VOID ConfigData, UINTN ConfigDataSize); // 0x34**
0x3C	} UBA_CONFIG_DATABASE_PRIVATE;
HOB	(Hand-Off Block) structures
0x00	UINT16 HobLength; // 0x02
0x04	} EFI_HOB_HEADER; // Total: 8 bytes
0x00	UINT32 DataCount; // 0x10: number of config entries
followed	by per-entry data starting at offset 0x14 (0x14 + 4 = 0x18 if 1st entry)
UBA	config HOB per-entry structure (36 bytes each)
Each	entry has a relative offset to data + data size
EFI	SYSTEM TABLE globals (assigned by _ModuleEntryPoint)
extern	UINTN ImageHandle;
Module	globals
EFI_HANDLE	mImageHandle;
Globals	for this module
VOID	*mDebugProtocol; // 0x1F50: cached debug logging protocol
0x1F10	EFI_GUID gUbaConfigHobGuid = {0xCC4CC9E4, 0x4E5EF25B, 0x252CFB26, 0x8D8D8D8D}; // 0x1F20 (example - not exact)
Forward	declarations
Overlapping	case: source is before destination and overlaps
copy	from end to start (backward copy not shown, IDA optimizes to same)
return	InternalCopyMemBackward(Dst, Src, Count);
UINTN	Count8 = Count >> 3;
Read	CMOS status register to determine debug level
EFI_D_INFO	break;
EFI_D_ERROR	**	EFI_D_INFO**
UBA_CONFIG_DATABASE_PRIVATE	helper: CR-based node access
CR	= CONTAINER_RECORD macro: from a member pointer, get the containing struct
Initialize	linked list entry to point to itself (empty list)
GUID	for HOB list
each	entry = GUID + Address (3 UINT64s)
Check	if debug is available via CMOS diagnostic port
Check	overlap
if	(Source > Destination && Source < &Destination[DestMax]) {
Initialize	private structure
Set	protocol GUID (0x504C4342 = "BCLP")
This	is the UBA protocol GUID data that identifies this interface
Load	initial configuration from HOB
Status	= UbaConfigDatabaseLoadFromHob(&Private->ConfigGuid);
Install	the protocol interface
Handle	= NULL;
Signature	check - will ASSERT if invalid
GUID	to search for in HOB (target config HOB)
Initialize	the config database with data from HOB
Status	= UbaConfigDatabaseNodeInit(
First	config GUID data
Config	name
Process	each config entry in the HOB
if	(Hob->DataCount > 0) {
Already	the right pointer from CR macro
Allocate	and initialize a new config node
Node	= AllocatePool((UINTN)This, 60);
Copy	the GUID data
Store	the GUID
Set	GUID from parameter
Insert	into linked list
Update	counters
This	+ 0x24 from CR macro
Walk	the linked list looking for a matching GUID
if	(!InternalBaseLibIsListValid(ListHead)) return EFI_NOT_FOUND;
Found	a matching node, copy data if buffer is large enough
if	(ConfigDataSize) {
Get	the HOB list (for later config loading)
Install	the UBA config database protocol
return	UbaConfigDatabaseInstallDriver(ImageHandle, SystemTable);

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