ConSplitter

Function Table

Address	Name	Description
	ConSplitterInitializeHiiProtocol
	ConSplitterTextOutReset
	ConSplitterTextOutOutputString
	ConSplitterTextOutTestString
	ConSplitterTextOutQueryMode
	ConSplitterTextOutSetMode
	ConSplitterTextOutSetAttribute
	ConSplitterTextOutClearScreen
	ConSplitterTextOutSetCursorPosition
	ConSplitterTextOutEnableCursor
	ConSplitterTextInReset
	ConSplitterTextInReadKeyStroke
	ConSplitterTextInWaitForKey
	ConSplitterPointerReset
	ConSplitterPointerGetState
	ConSplitterTextOutDriverBindingSupported
	ConSplitterTextOutDriverBindingStart
	ConSplitterTextOutDriverBindingStop
	ConSplitterDriverEntryPoint
	ConSplitterRegisterKeyNotify
	ConSplitterUnregisterKeyNotify
	ConSplitterGetDriverName
	ConSplitterGetControllerName
	ConSplitterConOutNotifyHandler
	ConSplitterConInNotifyHandler
	ConSplitterStdErrNotifyHandler
	ConSplitterDumpModeTable
	ConSplitterGetDebugLevel
	ConSplitterCopyMem
	ConSplitterIsLanguageEnUs
	ConSplitterReadUnaligned64
	ConSplitterIsProtocolGuidMatch
	ConSplitterLocateHob
	ConSplitterSynchronizeTextOut
	ConSplitterFlushBuffer
	ConSplitterScrollTextBuffer
	ConSplitterClearTextBuffer
	ConSplitterReconstructModeTable
SECTION	1: Global Data (.data section)
The	following globals are defined in the .data section of
Driver	binding protocol instances (installed via InstallMultipleProtocolInterfaces)
Text	Out driver binding:
off_5E98	= protocol GUID array
off_5E80	= driver binding protocol structure
Text	In driver binding:
Pointer	driver binding:
Protocol	GUIDs referenced from .rdata
unk_5C20	= EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL GUID
unk_5C70	= EFI_GRAPHICS_OUTPUT_PROTOCOL GUID
unk_5CA0	= EFI_DEVICE_PATH_PROTOCOL GUID
unk_5CB0	= (secondary text output mode protocol)
unk_5CD0	= EFI_UGA_DRAW_PROTOCOL GUID (or GOP mode protocol)
unk_5C90	= EFI_SIMPLE_POINTER_PROTOCOL GUID
unk_5D00	= (text output mode protocol alt)
unk_5D50	= EFI_ABSOLUTE_POINTER_PROTOCOL GUID
unk_5D40	= gEfiConsoleOutDeviceGuid
unk_5CF0	= EFI_HII_DATABASE_PROTOCOL GUID
unk_5C40	= EFI_SERIAL_IO_PROTOCOL GUID (or debug port)
unk_5C30	= gEfiGlobalVariableGuid (for "ConOutDev"/"ConInDev" UEFI vars)
unk_5D20	= gEfiConsoleControlGuid or gEfiSimpleTextOutProtocolGuid for HOB matching
unk_6010	/ unk_6020 = DebugLib protocol GUIDs
System	table and boot services cached globally
UINT64	gImageHandle = 0; // 0x6118
0x6108	UINT64 gBootServices = 0; // 0x6110
0x6120	//
UINT64	gBootServicesLocal = 0; // 0x6138
0x6140	UINT64 gSystemTableLocal = 0; // 0x6148
Cached	image handles for each driver binding
UINT64	gImageHandleTextOut = 0; // 0x5EB8 (ImageHandle_0)
0x5D88	(ImageHandle_1)
0x5DD0	(ImageHandle_2)
Text	Out state
VOID	*gConSplitterTextOutPrivate = NULL; // 0x6070 (qword_6070)
0x61E0	(p_n0xA = active count)
Text	In state
VOID	*gConSplitterTextInPrivate = NULL; // 0x5D90
0x61A0	(n0xA = active count)
0x61C0	(n0xA_2)
Pointer	state
UINT64	gConSplitterPointerActiveCount = 0; // 0x6200 (n0xA_0)
0x61E8	(i count)
0x6208	(i_0 count)
0x61A8	(j count)
0x6188	(j_0 count)
Linked	list anchors for child devices
Text	Out children: anchored at gConSplitterTextOutChildren
0x61E8	(i, i_1)
0x6208	(i_0, i_1_2)
Text	In children
0x61A0	(j, j_1)
0x61C0	/ 0x61A8 / 0x6188
Mode	management
UINT32	gConSplitterModeCount = 0; // 0x605C (dword_605C)
0x6100	(dword_6100)
0x5FF4	(dword_5FF4)
0x5FF0	(dword_5FF0)
Mode	table (9 bytes per entry: columns(4) + rows(4) + valid(1))
VOID	*gConSplitterModeTable = NULL; // 0x60D0 (qword_60D0)
Text	buffer pointers (double-buffered for scrollback)
VOID	*gConSplitterTextBuffer = NULL; // 0x60C8 (src / qword_60C8)
0x60D8	(src_0 / qword_60D8)
0x60B8	(src_1 / qword_60B8)
0x60F8	(dst / qword_60F8)
0x60F0	(dst_0 / qword_60F0)
Cursor	and display state
UINT32	gConSplitterCursorColumn = 0; // low part of n15
high	part of n15
n0x19	UINT32 gConSplitterColumns = 0; // n80
qword_5FF8	(n15)
Reentrancy	guards (nested call protection)
UINT8	gConSplitterTextOutRecursionCount = 0; // 0x6040 (byte_6040)
0x6041	(byte_6041)
0x6042	(byte_6042)
0x6058	(byte_6058)
0x606C	(byte_606C)
Text	In blocked state
UINT8	gConSplitterTextInBlocked = 0; // 0x6059 (byte_6059)
0x6179	(byte_6179)
0x607E	(byte_607E)
Attribute	/ cursor visibility
UINT8	gConSplitterCursorVisible = 0; // 0x6004 (byte_6004)
0x6008	(byte_6008)
Keyboard	LED state (low 2 bits = Scroll Lock state)
UINT8	gConSplitterLedState = 0; // 0x5D60 (byte_5D60)
0x5D61	(byte_5D61)
Debug	output mask (determines which debug level messages print)
UINT32	gConSplitterDebugMask = 0; // 0x5FFC
HII	protocol handle (keyboard layout database)
UINT64	gConSplitterHiiHandle = 0; // 0x6048 (qword_6048)
0x6060	(qword_6060)
HOB	list handle
UINT64	gConSplitterHobListHandle = 0; // 0x6130 (qword_6130)
DebugLib	protocol handles
UINT64	gConSplitterDebugProtocol = 0; // 0x6128 (qword_6128)
0x6140	/ 0x6168 / 0x6158
Key	notification state
UINT16	gConSplitterLastKeyScan = 0; // 0x6078 (word_6078)
0x5E40	(word_5E40)
Key	filter table (8 entries, 12 bytes each)
Each	entry has: ScanCode(2) + UnicodeChar(2) + ShiftState(4) + Reserved(4)
These	define which key combinations the splitter intercepts for
special	handling (e.g. hotkeys for console switching).
UINT8	*gConSplitterKeyFilter[8 12]; // 0x5DE0 (word_5DE0)**
Key	filter override flags (1 byte per filter entry)
Set	to 1 when a default notification handler is overridden.
UINT8	gConSplitterKeyFilterOverride[8]; // 0x6050 (byte_6050)
Text	In keyboard self-test state
UINT8	gConSplitterKeyboardTestPassed = 0; // 0x6068 (dword_6068, but used as byte)
0x6041	(byte_6041) - shared with blocked flag
Timer	event for keyboard polling
UINT64	gConSplitterTimerEvent = 0; // 0x5EC0 area
Resolution	scaling factors
UINT32	gConSplitterScaleX = 0; // 0x5F80 (dword_5F80)
0x5F88	(dword_5F88)
0x5F90	(dword_5F90)
Resolution	mode tracking data (off_5F10)
UINT64	gConSplitterResolutionModeData[6] = {0}; // 0x5F10
Notification	events
VOID	*gConSplitterConOutNotifyEvent = NULL; // 0x5EE8
0x5F18	*VOID gConSplitterConInNotifyReg = NULL; // 0x5F30**
Protocol	interface pointers (installed on system table)
VOID	*gConSplitterConOutInterface = NULL; // off_5FA0
off_5F18	*VOID gConSplitterStdErrInterface = NULL; // off_5F30**
Resolution	change notification structures
UINT64	gConSplitterResolutionEvent = 0; // 0x5F70 (off_5F70)
SECTION	2: Library Helpers
SECTION	3: Text Out Protocol Implementation
Update	mode state from current mode table
No	children - reset to defaults
Clear	internal text buffer
Mark	buffer as dirty (needs re-initialization)
Calculate	starting position in the scrollback buffer
Backspace	if (CursorCol > 0) {
Newline	if ((UINTN)(BufferPos + 2) >= (UINTN)gConSplitterTextBufEnd) {
Recalculate	position after scroll
Carriage	return
Normal	character
Recalculate	position
Write	character to buffer
Update	global cursor position
will	be recalculated
Now	dispatch to all active child devices
by	resetting cursor position and dispatching)
Update	mode state
No	children - return defaults
Already	in this mode
Update	each child's mode
No	children - reset cursor to origin
No	children - update local state
SECTION	4: Text In (Keyboard) Protocol Implementation
SECTION	6: Simple Pointer Protocol Implementation
SECTION	7: Driver Binding Protocol Implementation
Check	if controller supports text output protocol
Validate	the controller supports text output
Check	if already connected
Open	protocol to get the text output interface
Check	for duplicate device path
Create	child device node
Insert	into linked list of text out children
If	this is the first child, set up the mode table
Set	up graphics output protocol notification
Find	the child node for this controller
Close	protocols on this handle
Remove	from linked list
Free	the node
Check	if we need to update mode state
All	children removed - clean up resources
SECTION	8: Driver Entry Point
if	(gSystemTableLocal == 0) {
gConSplitterTextOutStartPrivate	= 0;
Status	= gBS->CreateEvent (
Status	= gBS->RegisterProtocolNotify (
Read	Setup variable for default mode configuration
Setup	variable exists - check its contents
Check	console mode bit (offset depends on
setup	variable layout - bit 0 in first byte)
and	configure the default mode
if	(gConSplitterModeTable != NULL) {
Set	the mode and cursor
50ms	= 20Hz keyboard poll
SECTION	9: Key Notification Support
Console	is blocked (self-test mode) - register in the global
notification	list for later activation
Insert	into notification linked list (i_1 list)
Normal	path - register on each child device
Status	= gBS->AllocatePool (
Register	on each Text In child device
Store	the child pointer
Register	on this child (if it supports KeyNotify)
Check	if this replaces a default key filter
Insert	into notification list
Find	the notification node in the linked list
Unregister	from each child device
SECTION	10: Component Name Protocol
SECTION	11: Console Notification Handlers
Find	any text output handles
Try	to start the driver on this handle
Register	device path protocol notify if not yet done
Find	any text input handles
Start	the driver
Set	the system table console input handle and protocol
Set	up system table mode
Register	the 8 default key filters
Similar	to ConOutNotifyHandler but for StdErr
Opens	EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL on the handle
SECTION	12: Debug and Diagnostic Functions
Read	CMOS index register 0x70, save high bit (NMI enable)
EFI_D_ERROR	only
EFI_D_ERROR	**	EFI_D_WARN**
Get	HOB list from SystemTable->BootServices
SECTION	13: Console Mode Management
We	have UGA Draw protocol - use it for mode switching
Synchronize	display buffer
No	UGA Draw - use text output scrolling
Restore	cursor position and attribute
Get	UGA Draw protocol from the reference device
Calculate	Blt buffer size from current mode dimensions
Blt	the buffer to the screen
Read	the attribute of the first character in the first line
Set	mode and cursor
Scroll	character by character
End	of line marker found
Set	new attribute
Get	max mode from reference device
Allocate	mode table: 9 bytes per mode entry
sizeof	= 4(cols) + 4(rows) + 1(valid)
Free	old table if it exists
Fill	mode table
Store	previous mode if valid
Set	mode to 0
Apply	default cursor setting

Generated by HR650X BIOS Decompilation Project