驅動程式 - Windows Driver Model (WDM) - 使用範例 - Assembly (MASM32) - Handle IOCTL IRP - Choose METHOD_BUFFERED

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\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
 
IOCTL_GET   equ CTL_CODE(FILE_DEVICE_UNKNOWN, 800h, METHOD_BUFFERED, FILE_ANY_ACCESS)
IOCTL_SET   equ CTL_CODE(FILE_DEVICE_UNKNOWN, 801h, METHOD_BUFFERED, FILE_ANY_ACCESS)
    
.const
MSG_GET     byte "IOCTL_GET",0
MSG_SET     byte "IOCTL_SET",0
 
.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
 
IrpIOCTL proc pMyDevice : PDEVICE_OBJECT, pIrp : PIRP
    local pBuf : DWORD
    local dwLen : DWORD
    local pDevExt : ptr
 
    and dwLen, 0
    mov eax, pMyDevice
    push (DEVICE_OBJECT ptr [eax]).DeviceExtension
    pop pDevExt
 
    IoGetCurrentIrpStackLocation pIrp
    mov eax, (IO_STACK_LOCATION ptr [eax]).Parameters.DeviceIoControl.IoControlCode
    .if eax == IOCTL_GET
        invoke DbgPrint, offset MSG_GET
        mov eax, pIrp
        push (_IRP ptr [eax]).AssociatedIrp.SystemBuffer
        pop pBuf
 
        mov eax, pDevExt
        invoke strcpy, pBuf, addr (MyDeviceExtension ptr [eax]).szBuffer
         
        mov eax, pDevExt
        invoke strlen, addr (MyDeviceExtension ptr [eax]).szBuffer
        mov dwLen, eax
    .elseif eax == IOCTL_SET
        invoke DbgPrint, offset MSG_SET
 
        IoGetCurrentIrpStackLocation pIrp
        push (IO_STACK_LOCATION ptr [eax]).Parameters.DeviceIoControl.InputBufferLength 
        pop dwLen
 
        mov eax, pIrp
        push (_IRP ptr [eax]).AssociatedIrp.SystemBuffer
        pop pBuf
 
        mov eax, pDevExt
        invoke memcpy, addr (MyDeviceExtension ptr [eax]).szBuffer, pBuf, dwLen
        invoke DbgPrint, $CTA0("Buffer: %s, Length: %d"), pBuf, 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
    mov eax, STATUS_SUCCESS
    ret
IrpIOCTL 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, offset $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 IrpOpenClose
    mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_CLOSE          * (sizeof PVOID)], offset IrpOpenClose
    mov (DRIVER_OBJECT ptr [eax]).MajorFunction[IRP_MJ_DEVICE_CONTROL * (sizeof PVOID)], offset IrpIOCTL
    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

完成