參考資訊：
https://wasm.in/
http://four-f.narod.ru/
https://github.com/steward-fu/ddk
StartIo提供一個序列化的機制，讓使用者可以依照順序處理IRP，這個機制對於某些只能序列處理資料的硬體相當有幫助，省去用軟體實現序列化的程式碼，StartIo使用步驟如下：
1. IoMarkIrpPending()
2. IoStartNextPacket()
main.asm
.386p
.model flat, stdcall
option casemap:none
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\Macros\Strings.mac
includelib c:\masm32\lib\wxp\i386\ntoskrnl.lib
public DriverEntry
MyDeviceExtension struct
pNextDev PDEVICE_OBJECT ?
szBuffer byte 255 dup(?)
MyDeviceExtension ends
.code
StartIo proc pMyDevice : PDEVICE_OBJECT, pIrp : PIRP
local pBuf : DWORD
local dwLen : DWORD
local pDevExt : ptr
mov eax, pMyDevice
push (DEVICE_OBJECT ptr [eax]).DeviceExtension
pop pDevExt
mov eax, pIrp
push (_IRP ptr [eax]).AssociatedIrp.SystemBuffer
pop pBuf
IoGetCurrentIrpStackLocation pIrp
movzx eax, (IO_STACK_LOCATION ptr [eax]).MajorFunction
.if eax == IRP_MJ_WRITE
invoke DbgPrint, $CTA0("StartIo, IRP_MJ_WRITE")
IoGetCurrentIrpStackLocation pIrp
Push (IO_STACK_LOCATION ptr [eax]).Parameters.Write._Length
pop dwLen
mov eax, pDevExt
invoke memcpy, addr (MyDeviceExtension ptr [eax]).szBuffer, pBuf, dwLen
invoke DbgPrint, $CTA0("Buffer: %s, Length: %d"), pBuf, dwLen
.elseif eax == IRP_MJ_READ
invoke DbgPrint, $CTA0("StartIo, IRP_MJ_READ")
mov eax, pDevExt
invoke strlen, addr (MyDeviceExtension ptr [eax]).szBuffer
mov dwLen, eax
mov eax, pDevExt
invoke memcpy, pBuf, addr (MyDeviceExtension ptr [eax]).szBuffer, dwLen
.endif
mov eax, pIrp
mov (_IRP ptr [eax]).IoStatus.Status, STATUS_SUCCESS
push dwLen
pop (_IRP ptr [eax]).IoStatus.Information
fastcall IofCompleteRequest, pIrp, IO_NO_INCREMENT
invoke IoStartNextPacket, pMyDevice, FALSE
mov eax, STATUS_SUCCESS
ret
StartIo endp
IrpFile proc pMyDevice : PDEVICE_OBJECT, pIrp : PIRP
IoGetCurrentIrpStackLocation pIrp
movzx eax, (IO_STACK_LOCATION ptr [eax]).MajorFunction
.if (eax == IRP_MJ_CREATE) || (eax == IRP_MJ_CLOSE)
.if (eax == IRP_MJ_CREATE)
invoke DbgPrint, $CTA0("IRP_MJ_CREATE")
.else
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
.elseif (eax == IRP_MJ_READ) || (eax == IRP_MJ_WRITE)
.if (eax == IRP_MJ_READ)
invoke DbgPrint, $CTA0("IrpFile, IRP_MJ_READ")
.else
invoke DbgPrint, $CTA0("IrpFile, IRP_MJ_WRITE")
.endif
IoGetCurrentIrpStackLocation pIrp
IoMarkIrpPending pIrp
invoke IoStartPacket, pMyDevice, pIrp, 0, NULL
mov eax, STATUS_PENDING
.endif
ret
IrpFile endp
IrpPnp proc pMyDevice : PDEVICE_OBJECT, pIrp : PIRP
local pDevExt : ptr
local szSymName : UNICODE_STRING
mov eax, pMyDevice
push (DEVICE_OBJECT ptr [eax]).DeviceExtension
pop pDevExt
IoGetCurrentIrpStackLocation pIrp
movzx eax, (IO_STACK_LOCATION ptr [eax]).MinorFunction
.if eax == IRP_MN_START_DEVICE
mov eax, pIrp
mov (_IRP ptr [eax]).IoStatus.Status, STATUS_SUCCESS
.elseif eax == IRP_MN_REMOVE_DEVICE
invoke RtlInitUnicodeString, addr szSymName, $CTW0("\\DosDevices\\MyDriver")
invoke IoDeleteSymbolicLink, addr szSymName
mov eax, pIrp
mov (_IRP ptr [eax]).IoStatus.Status, STATUS_SUCCESS
mov eax, pDevExt
invoke IoDetachDevice, (MyDeviceExtension ptr [eax]).pNextDev
invoke IoDeleteDevice, pMyDevice
fastcall IofCompleteRequest, pIrp, IO_NO_INCREMENT
ret
.endif
IoSkipCurrentIrpStackLocation pIrp
mov eax, pDevExt
invoke IoCallDriver, (MyDeviceExtension ptr [eax]).pNextDev, pIrp
ret
IrpPnp endp
AddDevice proc pMyDriver : PDRIVER_OBJECT, pPhyDevice : PDEVICE_OBJECT
local pMyDevice : PDEVICE_OBJECT
local szDevName : UNICODE_STRING
local szSymName : UNICODE_STRING
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
invoke IoAttachDeviceToDeviceStack, pMyDevice, pPhyDevice
.if eax != NULL
push eax
mov eax, pMyDevice
mov eax, (DEVICE_OBJECT ptr [eax]).DeviceExtension
pop (MyDeviceExtension ptr [eax]).pNextDev
mov eax, pMyDevice
or (DEVICE_OBJECT ptr [eax]).Flags, DO_BUFFERED_IO
and (DEVICE_OBJECT ptr [eax]).Flags, not DO_DEVICE_INITIALIZING
invoke IoCreateSymbolicLink, addr szSymName, addr szDevName
.endif
.endif
ret
AddDevice endp
Unload proc pMyDriver : PDRIVER_OBJECT
ret
Unload endp
DriverEntry proc pMyDriver : PDRIVER_OBJECT, pMyRegistry : PUNICODE_STRING
mov eax, pMyDriver
mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_PNP * (sizeof PVOID)], offset IrpPnp
mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_CREATE * (sizeof PVOID)], offset IrpFile
mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_CLOSE * (sizeof PVOID)], offset IrpFile
mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_WRITE * (sizeof PVOID)], offset IrpFile
mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_READ * (sizeof PVOID)], offset IrpFile
mov (DRIVER_OBJECT ptr [eax]).DriverStartIo, offset StartIo
mov (DRIVER_OBJECT ptr [eax]).DriverUnload, offset Unload
mov eax, (DRIVER_OBJECT ptr [eax]).DriverExtension
mov (DRIVER_EXTENSION ptr [eax]).AddDevice, AddDevice
mov eax, STATUS_SUCCESS
ret
DriverEntry endp
end
app.asm
.386p
.model flat, stdcall
option casemap:none
include c:\masm32\include\windows.inc
include c:\masm32\include\masm32.inc
include c:\masm32\include\user32.inc
include c:\masm32\include\msvcrt.inc
include c:\masm32\Macros\Strings.mac
include c:\masm32\include\kernel32.inc
includelib c:\masm32\lib\user32.lib
includelib c:\masm32\lib\masm32.lib
includelib c:\masm32\lib\msvcrt.lib
includelib c:\masm32\lib\kernel32.lib
.const
MSG_INFO db "I am error",0
MSG_WRITE db "WR: %s",10,13,0
MSG_READ db "RD: %s",10,13,0
MSG_LEN db "Length: %d",10,13,0
.data?
hFile dd ?
dwRet dd ?
szBuffer db 256 dup(?)
.code
start:
invoke CreateFile, $CTA0("\\\\.\\MyDriver"), GENERIC_READ or GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0
mov hFile, eax
invoke wsprintf, offset szBuffer, offset MSG_INFO
invoke StrLen, offset szBuffer
mov dwRet, eax
invoke crt_printf, offset MSG_WRITE, offset szBuffer
invoke crt_printf, offset MSG_LEN, dwRet
invoke WriteFile, hFile, offset szBuffer, dwRet, offset dwRet, 0
invoke crt_memset, offset szBuffer, 0, 255
invoke ReadFile, hFile, offset szBuffer, 255, offset dwRet, 0
invoke crt_printf, offset MSG_READ, offset szBuffer
invoke crt_printf, offset MSG_LEN, dwRet
invoke CloseHandle, hFile
invoke ExitProcess, 0
end start
end
完成