參考資訊：
https://wasm.in/
http://four-f.narod.ru/
https://github.com/steward-fu/ddk
main.asm
.386p
.model flat, stdcall
option casemap:none
include c:\masm32\Macros\Strings.mac
include c:\masm32\include\w2k\ntstatus.inc
include c:\masm32\include\w2k\ntddk.inc
include c:\masm32\include\w2k\ntoskrnl.inc
include c:\masm32\include\w2k\ntddkbd.inc
include c:\masm32\include\wxp\wdm.inc
include c:\masm32\include\wxp\seh0.inc
includelib c:\masm32\lib\wxp\i386\ntoskrnl.lib
public DriverEntry
MyDeviceExtension struct
szBuffer byte 255 dup(?)
pNextDevice PDEVICE_OBJECT ?
MyDeviceExtension ends
.code
IrpOpenClose proc pMyDevice : PDEVICE_OBJECT, pIrp : PIRP
IoGetCurrentIrpStackLocation pIrp
movzx eax, (IO_STACK_LOCATION ptr [eax]).MajorFunction
.if eax == IRP_MJ_CREATE
invoke DbgPrint, $CTA0("IRP_MJ_CREATE")
.elseif eax == IRP_MJ_CLOSE
invoke DbgPrint, $CTA0("IRP_MJ_CLOSE")
.endif
mov eax, pIrp
and (_IRP ptr [eax]).IoStatus.Information, 0
mov (_IRP ptr [eax]).IoStatus.Status, STATUS_SUCCESS
fastcall IofCompleteRequest, pIrp, IO_NO_INCREMENT
mov eax, STATUS_SUCCESS
ret
IrpOpenClose endp
IrpReadWrite proc uses esi edi pMyDevice : PDEVICE_OBJECT, pIrp : PIRP
local len : dword
local bReadable : dword
local bWritable : dword
and len, 0
mov eax, pMyDevice
mov eax, (DEVICE_OBJECT ptr [eax]).DeviceExtension
lea edi, (MyDeviceExtension ptr [eax]).szBuffer
mov eax, pIrp
push (_IRP ptr [eax]).UserBuffer
pop esi
IoGetCurrentIrpStackLocation pIrp
movzx eax, (IO_STACK_LOCATION ptr [eax]).MajorFunction
.if eax == IRP_MJ_WRITE
invoke DbgPrint, $CTA0("IRP_MJ_WRITE")
IoGetCurrentIrpStackLocation pIrp
push (IO_STACK_LOCATION ptr [eax]).Parameters.Write._Length
pop len
mov bReadable, 0
_try
invoke ProbeForRead, esi, len, 1
invoke memcpy, edi, esi, len
invoke DbgPrint, $CTA0("Address: 0x%x, Length: %d"), esi, len
mov bReadable, 1
_finally
.if bReadable == 0
invoke DbgPrint, $CTA0("Failed to read from user buffer")
.endif
.elseif eax == IRP_MJ_READ
invoke DbgPrint, $CTA0("IRP_MJ_READ")
mov bWritable, 0
_try
invoke ProbeForWrite, esi, len, 1
invoke strcpy, esi, edi
invoke strlen, edi
mov len, eax
mov bWritable, 1
_finally
.if bWritable == 0
invoke DbgPrint, $CTA0("Failed to write to user buffer")
.endif
.endif
mov eax, pIrp
push len
pop (_IRP ptr [eax]).IoStatus.Information
mov (_IRP ptr [eax]).IoStatus.Status, STATUS_SUCCESS
fastcall IofCompleteRequest, pIrp, IO_NO_INCREMENT
mov eax, STATUS_SUCCESS
ret
IrpReadWrite endp
Unload proc pMyDriver : PDRIVER_OBJECT
local szSymName : UNICODE_STRING
invoke RtlInitUnicodeString, addr szSymName, $CTW0("\\DosDevices\\MyDriver")
invoke IoDeleteSymbolicLink, addr szSymName
mov eax, pMyDriver
invoke IoDeleteDevice, (DRIVER_OBJECT ptr [eax]).DeviceObject
ret
Unload endp
DriverEntry proc pMyDriver : PDRIVER_OBJECT, pMyRegistry : PUNICODE_STRING
local pMyDevice : PDEVICE_OBJECT
local szDevName : UNICODE_STRING
local szSymName : UNICODE_STRING
mov eax, pMyDriver
mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_CREATE * (sizeof PVOID)], offset IrpOpenClose
mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_CLOSE * (sizeof PVOID)], offset IrpOpenClose
mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_WRITE * (sizeof PVOID)], offset IrpReadWrite
mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_READ * (sizeof PVOID)], offset IrpReadWrite
mov (DRIVER_OBJECT ptr [eax]).DriverUnload, offset Unload
invoke RtlInitUnicodeString, addr szDevName, $CTW0("\\Device\\MyDriver")
invoke RtlInitUnicodeString, addr szSymName, $CTW0("\\DosDevices\\MyDriver")
invoke IoCreateDevice, pMyDriver, sizeof MyDeviceExtension, addr szDevName, FILE_DEVICE_UNKNOWN, 0, FALSE, addr pMyDevice
.if eax == STATUS_SUCCESS
mov eax, pMyDevice
and (DEVICE_OBJECT ptr [eax]).Flags, not DO_DEVICE_INITIALIZING
invoke IoCreateSymbolicLink, addr szSymName, addr szDevName
.endif
ret
DriverEntry endp
end DriverEntry
.end
完成