C / C++ / MFC

Mattzimmerer wrote:

Say my driver:
1) allocates its own memory
2) copies a byte from a specified address into its own memory

I should be fine right? How could I possibly screw that up right?

#if !defined(_MEMORYREADER_H_)<br />
#define _MEMORYREADER_H_<br />
<br />
#include <ntddk.h><br />
#include <wdf.h><br />
<br />
#define __DRIVER_NAME "MR: "<br />
<br />
typedef struct _DEVICE_CONTEXT {<br />
  WDFQUEUE          IoDefaultQueue;<br />
} DEVICE_CONTEXT, *PDEVICE_CONTEXT;<br />
<br />
WDF_DECLARE_CONTEXT_TYPE_WITH_NAME(DEVICE_CONTEXT, GetDeviceContext);<br />
<br />
<br />
NTSTATUS<br />
DriverEntry(<br />
    IN PDRIVER_OBJECT  DriverObject, <br />
    IN PUNICODE_STRING  RegistryPath<br />
    );<br />
<br />
NTSTATUS<br />
EvtDriverDeviceAdd(<br />
    IN WDFDRIVER        Driver,<br />
    IN PWDFDEVICE_INIT  DeviceInit<br />
    );<br />
<br />
NTSTATUS<br />
EvtDevicePrepareHardware(<br />
    IN WDFDEVICE    Device,<br />
    IN WDFCMRESLIST ResourceList,<br />
    IN WDFCMRESLIST ResourceListTranslated<br />
    );<br />
<br />
VOID<br />
EvtDeviceIoDefault(<br />
    IN WDFQUEUE  Queue,<br />
    IN WDFREQUEST  Request<br />
    );<br />
<br />
NTSTATUS<br />
EvtDeviceD0Entry(<br />
    IN WDFDEVICE  Device,<br />
    IN WDF_POWER_DEVICE_STATE  PreviousState<br />
    );<br />
<br />
NTSTATUS<br />
EvtDeviceD0Exit(<br />
    IN WDFDEVICE  Device,<br />
    IN WDF_POWER_DEVICE_STATE  TargetState<br />
    );<br />
<br />
#endif //(_MEMORYREADER_H_)<br />
<br />

Mattzimmerer wrote:

So if my driver calls DriverEntry

Mattzimmerer wrote:

Is this still in ring-0

Ubid007 wrote:

Programming methods to read data from / write data to a USB port in C++