參考資訊:
https://wasm.in/
http://four-f.narod.ru/
https://github.com/steward-fu/ddk
由於I/O Timer的Timer間隔固定為一秒,如果使用者想要可以彈性設定的Timer間隔,則需要使用DPC Timer,使用步驟如下:
1. KeInitializeTimer()
2. KeInitializeDpc()
3. KeSetTimer()
4. KeCancelTimer()
DPC Timer如果使用KeSetTimer()做設定時,其Timer為一次性,也就是Callback僅會被呼叫一次,如果要使用週期性Timer,則需要改用KeSetTimerEx()
BOOLEAN KeSetTimerEx(PKTIMER Timer, LARGE_INTEGER DueTime, LONG Period, PKDPC Dpc);
DueTime是第一次Timer的間隔,之後的間隔則使用Period數值
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 dwTimerCnt DWORD ? stTimerDPC KDPC <> stTimerObj KTIMER <> pNextDev PDEVICE_OBJECT ? MyDeviceExtension ends IOCTL_START equ CTL_CODE(FILE_DEVICE_UNKNOWN, 800h, METHOD_BUFFERED, FILE_ANY_ACCESS) IOCTL_STOP equ CTL_CODE(FILE_DEVICE_UNKNOWN, 801h, METHOD_BUFFERED, FILE_ANY_ACCESS) .const MSG_START byte "IOCTL_START",0 MSG_STOP byte "IOCTL_STOP",0 .code OnTimer proc pDpc : PKDPC, pContext : PVOID, pArg1 : PVOID, PArg2 : PVOID mov eax, pContext mov eax, (DEVICE_OBJECT ptr [eax]).DeviceExtension inc (MyDeviceExtension ptr[eax]).dwTimerCnt invoke DbgPrint, $CTA0("DpcTimer: %d\n"), (MyDeviceExtension ptr[eax]).dwTimerCnt ret OnTimer endp 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 uses ebx pMyDevice : PDEVICE_OBJECT, pIrp : PIRP local pBuf : DWORD local dwLen : DWORD local pDevExt : ptr local hThread : DWORD local pThread : PVOID local stTimeCnt : LARGE_INTEGER 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_START invoke DbgPrint, offset MSG_START or stTimeCnt.HighPart, -1 mov stTimeCnt.LowPart, -10000000 mov ebx, pDevExt mov (MyDeviceExtension ptr[ebx]).dwTimerCnt, 0 ;invoke KeSetTimer, addr (MyDeviceExtension ptr[ebx]).stTimerObj, stTimeCnt.LowPart, stTimeCnt.HighPart, addr (MyDeviceExtension ptr[ebx]).stTimerDPC invoke KeSetTimerEx, addr (MyDeviceExtension ptr[ebx]).stTimerObj, stTimeCnt.LowPart, stTimeCnt.HighPart, 1000, addr (MyDeviceExtension ptr[ebx]).stTimerDPC .elseif eax == IOCTL_STOP invoke DbgPrint, offset MSG_STOP mov ebx, pDevExt invoke KeCancelTimer, addr (MyDeviceExtension ptr[ebx]).stTimerObj .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, $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 mov eax, STATUS_SUCCESS mov eax, pMyDevice mov eax, (DEVICE_OBJECT ptr [eax]).DeviceExtension invoke KeInitializeTimer, addr (MyDeviceExtension ptr [eax]).stTimerObj mov eax, pMyDevice mov eax, (DEVICE_OBJECT ptr [eax]).DeviceExtension invoke KeInitializeDpc, addr (MyDeviceExtension ptr [eax]).stTimerDPC, offset OnTimer, pMyDevice 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
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\include\kernel32.inc include c:\masm32\include\w2k\ntddkbd.inc include c:\masm32\Macros\Strings.mac includelib c:\masm32\lib\user32.lib includelib c:\masm32\lib\masm32.lib includelib c:\masm32\lib\msvcrt.lib includelib c:\masm32\lib\kernel32.lib IOCTL_START equ CTL_CODE(FILE_DEVICE_UNKNOWN, 800h, METHOD_BUFFERED, FILE_ANY_ACCESS) IOCTL_STOP equ CTL_CODE(FILE_DEVICE_UNKNOWN, 801h, METHOD_BUFFERED, FILE_ANY_ACCESS) .data? hFile dd ? dwRet dd ? .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 DeviceIoControl, hFile, IOCTL_START, NULL, 0, NULL, 0, offset dwRet, NULL invoke Sleep, 3000 invoke DeviceIoControl, hFile, IOCTL_STOP, NULL, 0, NULL, 0, offset dwRet, NULL invoke CloseHandle, hFile invoke ExitProcess, 0 end start end
完成