DEVICE_OBJECT ；struct _DEVICE_OBJECT *AttachedDevice; // 附载的设备，与AttachedTo域构成双链表关系
DEVICE_OBJECT
(2011-08-08 00:33:45)
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typedef struct _DEVICE_OBJECT {
CSHORT Type;
USHORT Size;
LONG ReferenceCount; // 引用计数值
struct _DRIVER_OBJECT *DriverObject; // 指向关联的驱动程序对象
struct _DEVICE_OBJECT *NextDevice; // 指向关联同一驱动程序对象的下一个设备对象
struct _DEVICE_OBJECT *AttachedDevice; // 附载的设备，与AttachedTo域构成双链表关系
struct _IRP *CurrentIrp; // 当前正在处理的I/O请求包
PIO_TIMER Timer; // 设备对象的定时器
ULONG Flags; // 设备对象标志，以DO_作为前缀的一组常量
ULONG Characteristics; // 设备的特征，以FILE_作为前缀的一组常量
PVPB Vpb; // 指向设备的卷参数块（Volumn Parameter Block）
PVOID DeviceExtension; // 指向设备对象的扩展部分
DEVICE_TYPE DeviceType; // 设备类型
CCHAR StackSize; // 设备栈的大小
union {
LIST_ENTRY ListEntry; // 用于文件系统的设备对象，形成一个链表
WAIT_CONTEXT_BLOCK Wcb; // 等待环境块，用于与控制器对象协作
} Queue;
ULONG AlignmentRequirement; // 缓冲区的对齐要求，其值等于对齐边界减一
KDEVICE_QUEUE DeviceQueue; // 设备队列，存放针对该设备的I/O请求
KDPC Dpc;
ULONG ActiveThreadCount; // 用于文件系统：使用此设备对象的线程数
PSECURITY_DESCRIPTOR SecurityDescriptor; // 设备的安全描述符
KEVENT DeviceLock; // 设备锁
USHORT SectorSize; // 扇区大小
USHORT Spare1;
struct _DEVOBJ_EXTENSION *DeviceObjectExtension; // 指向扩展部分
PVOID Reserved;
} DEVICE_OBJECT;
typedef struct _DEVICE_OBJECT *PDEVICE_OBJECT;
; Device Object structure definition
DEVICE_OBJECT STRUCT ; sizeof = 0B8h
_Type SWORD ? ; 0000h (IO_TYPE_DEVICE = 3) (original field name Type)
_Size WORD ? ; 0002h (original name Size)
ReferenceCount SDWORD ? ; 0004h
DriverObject PVOID ? ; 0008h PTR DRIVER_OBJECT
NextDevice PVOID ? ; 000Ch PTR DEVICE_OBJECT
AttachedDevice PVOID ? ; 0010h PTR DEVICE_OBJECT
CurrentIrp PVOID ? ; 0014h PTR IRP
Timer PVOID ? ; 0018h PTR IO_TIMER
Flags DWORD ? ; 001Ch DO_*
Characteristics DWORD ? ; 0020h FILE_*
Vpb PVOID ? ; 0024h PTR VPB
DeviceExtension PVOID ? ; 0028h
DeviceType DWORD ? ; 002Ch DEVICE_TYPE
StackSize BYTE ? ; 0030h
db 3 dup(?); padding
UNION Queue
ListEntry LIST_ENTRY <> ; 0034h
Wcb WAIT_CONTEXT_BLOCK <> ; 0034h
ENDS ; Queue
AlignmentRequirement DWORD ? ; 005Ch
DeviceQueue KDEVICE_QUEUE <>; 0060h
Dpc KDPC <> ; 0074h
; The following field is for exclusive use by the filesystem to keep
; track of the number of Fsp threads currently using the device
ActiveThreadCount DWORD ? ; 0094h
SecurityDescriptor PVOID ? ; 0098h PSECURITY_DESCRIPTOR
DeviceLock KEVENT <> ; 009Ch
SectorSize WORD ? ; 00ACh
Spare1 WORD ? ; 00AEh
DeviceObjectExtension PVOID ? ; 00B0h PTR DEVOBJ_EXTENSION
Reserved PVOID ? ; 00B4h
DEVICE_OBJECT ENDS
PDEVICE_OBJECT typedef PTR DEVICE_OBJECT
typedef struct _DEVICE_OBJECT {
CSHORT Type;
USHORT Size;
LONG ReferenceCount;
PDRIVER_OBJECT DriverObject;
PDEVICE_OBJECT NextDevice;
PDEVICE_OBJECT AttachedDevice;
PIRP CurrentIrp;
PIO_TIMER Timer;
ULONG Flags;
ULONG Characteristics;
__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;
ULONG ActiveThreadCount;
PSECURITY_DESCRIPTOR SecurityDescriptor;
KEVENT DeviceLock;
USHORT SectorSize;
USHORT Spare1;
PDEVOBJ_EXTENSION DeviceObjectExtension;
PVOID Reserved;
} DEVICE_OBJECT, *PDEVICE_OBJECT;
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