几个驱动重要的结构

DEVICE_OBJECT:
typedef struct DECLSPEC_ALIGN(MEMORY_ALLOCATION_ALIGNMENT) _DEVICE_OBJECT {
CSHORT Type;
USHORT Size;
LONG ReferenceCount;
struct _DRIVER_OBJECT *DriverObject;
struct _DEVICE_OBJECT *NextDevice;
struct _DEVICE_OBJECT *AttachedDevice;
struct _IRP *CurrentIrp;
PIO_TIMER Timer;
ULONG Flags; // See above: DO_...
ULONG Characteristics; // See ntioapi: FILE_...
__volatile PVPB Vpb;
PVOID DeviceExtension;
DEVICE_TYPE DeviceType;
CCHAR StackSize;
union {
LIST_ENTRY ListEntry;
WAIT_CONTEXT_BLOCK Wcb;
} Queue;
ULONG AlignmentRequirement;
KDEVICE_QUEUE DeviceQueue;
KDPC Dpc;

//
// The following field is for exclusive use by the filesystem to keep
// track of the number of Fsp threads currently using the device
//

ULONG ActiveThreadCount;
PSECURITY_DESCRIPTOR SecurityDescriptor;
KEVENT DeviceLock;

USHORT SectorSize;
USHORT Spare1;

struct _DEVOBJ_EXTENSION *DeviceObjectExtension;
PVOID Reserved;

} DEVICE_OBJECT;

typedef struct _DEVICE_OBJECT *PDEVICE_OBJECT;
DRIVER_OBJECT:
typedef struct _DRIVER_OBJECT {
CSHORT Type;
CSHORT Size;

//
// The following links all of the devices created by a single driver
// together on a list, and the Flags word provides an extensible flag
// location for driver objects.
//

PDEVICE_OBJECT DeviceObject;
ULONG Flags;

//
// The following section describes where the driver is loaded. The count
// field is used to count the number of times the driver has had its
// registered reinitialization routine invoked.
//

PVOID DriverStart;
ULONG DriverSize;
PVOID DriverSection;
PDRIVER_EXTENSION DriverExtension;

//
// The driver name field is used by the error log thread
// determine the name of the driver that an I/O request is/was bound.
//

UNICODE_STRING DriverName;

//
// The following section is for registry support. Thise is a pointer
// to the path to the hardware information in the registry
//

PUNICODE_STRING HardwareDatabase;

//
// The following section contains the optional pointer to an array of
// alternate entry points to a driver for "fast I/O" support. Fast I/O
// is performed by invoking the driver routine directly with separate
// parameters, rather than using the standard IRP call mechanism. Note
// that these functions may only be used for synchronous I/O, and when
// the file is cached.
//

PFAST_IO_DISPATCH FastIoDispatch;

//
// The following section describes the entry points to this particular
// driver. Note that the major function dispatch table must be the last
// field in the object so that it remains extensible.
//

PDRIVER_INITIALIZE DriverInit;
PDRIVER_STARTIO DriverStartIo;
PDRIVER_UNLOAD DriverUnload;
PDRIVER_DISPATCH MajorFunction[IRP_MJ_MAXIMUM_FUNCTION + 1];

} DRIVER_OBJECT;
typedef struct _DRIVER_OBJECT *PDRIVER_OBJECT;
UNICODE_STRING:
typedef struct _UNICODE_STRING {
USHORT Length;
USHORT MaximumLength;
#ifdef MIDL_PASS
[size_is(MaximumLength / 2), length_is((Length) / 2) ] USHORT * Buffer;
#else // MIDL_PASS
__field_bcount_part(MaximumLength, Length) PWCH Buffer;
#endif // MIDL_PASS
} UNICODE_STRING;
typedef UNICODE_STRING *PUNICODE_STRING;
typedef const UNICODE_STRING *PCUNICODE_STRING;
#define UNICODE_NULL ((WCHAR)0) // winnt