mouclass!MouseClassReadCopyData函数分析之In前Out后的情形和Out前In后的情形----非常重要

mouclass!MouseClassReadCopyData函数分析之In前Out后的情形和Out前In后的情形
0: kd> g
Breakpoint 0 hit
mouclass!MouseClassReadCopyData:
f74f9d26 55              push    ebp
0: kd> kc 4
 #
00 mouclass!MouseClassReadCopyData
01 mouclass!MouseClassHandleRead
02 mouclass!MouseClassRead
03 nt!IofCallDriver
0: kd> dv DeviceExtension
DeviceExtension = 0x894060f0
0: kd> dx -r1 ((mouclass!_DEVICE_EXTENSION *)0x894060f0)
((mouclass!_DEVICE_EXTENSION *)0x894060f0)                 : 0x894060f0 [Type: _DEVICE_EXTENSION *]
    [+0x000] Self             : 0x89406038 : Device for "\Driver\Mouclass" [Type: _DEVICE_OBJECT *]
    [+0x004] TrueClassDevice  : 0x89406038 : Device for "\Driver\Mouclass" [Type: _DEVICE_OBJECT *]
    [+0x008] TopPort          : 0x898db158 : Device for "\Driver\mouhid" [Type: _DEVICE_OBJECT *]
    [+0x00c] PDO              : 0x89536cc0 : Device for "\Driver\hidusb" [Type: _DEVICE_OBJECT *]
    [+0x010] RemoveLock       [Type: _IO_REMOVE_LOCK]
    [+0x068] PnP              : 0x1 [Type: unsigned char]
    [+0x069] Started          : 0x1 [Type: unsigned char]
    [+0x06a] OkayToLogOverflow : 0x1 [Type: unsigned char]
    [+0x06c] WaitWakeSpinLock : 0x0 [Type: unsigned long]
    [+0x070] TrustedSubsystemCount : 0x1 [Type: unsigned long]
    [+0x074] InputCount       : 0x4 [Type: unsigned long]
    [+0x078] SymbolicLinkName : "\??\HID#Vid_0e0f&Pid_0003&MI_00#8&28f6544d&0&0000#{378de44c-56ef-11d1-bc8c-00a0c91405dd}" [Type: _UNICODE_STRING]
    [+0x080] InputData        : 0x898531b0 [Type: _MOUSE_INPUT_DATA *]
    [+0x084] DataIn           : 0x898534e0 [Type: _MOUSE_INPUT_DATA *]
    [+0x088] DataOut          : 0x89853480 [Type: _MOUSE_INPUT_DATA *]
    [+0x08c] MouseAttributes  [Type: _MOUSE_ATTRIBUTES]
    [+0x098] SpinLock         : 0x895aada1 [Type: unsigned long]
    [+0x09c] ReadQueue        [Type: _LIST_ENTRY]
    [+0x0a4] SequenceNumber   : 0x18 [Type: unsigned long]
    [+0x0a8] DeviceState      : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
    [+0x0ac] SystemState      : PowerSystemWorking (1) [Type: _SYSTEM_POWER_STATE]
    [+0x0b0] UnitId           : 0x0 [Type: unsigned long]
    [+0x0b4] WmiLibInfo       [Type: _WMILIB_CONTEXT]
    [+0x0d4] SystemToDeviceState [Type: _DEVICE_POWER_STATE [5]]
    [+0x0e8] MinDeviceWakeState : PowerDeviceD0 (1) [Type: _DEVICE_POWER_STATE]
    [+0x0ec] MinSystemWakeState : PowerSystemSleeping1 (2) [Type: _SYSTEM_POWER_STATE]
    [+0x0f0] WaitWakeIrp      : 0x0 [Type: _IRP *]
    [+0x0f4] ExtraWaitWakeIrp : 0x0 [Type: _IRP *]
    [+0x0f8] TargetNotifyHandle : 0x0 [Type: void *]
    [+0x0fc] Link             [Type: _LIST_ENTRY]
    [+0x104] File             : 0x0 [Type: _FILE_OBJECT *]
    [+0x108] Enabled          : 0x0 [Type: unsigned char]
    [+0x109] WaitWakeEnabled  : 0x0 [Type: unsigned char]
    [+0x10a] SurpriseRemoved  : 0x0 [Type: unsigned char]
0: kd> dx -r1 (*((mouclass!_MOUSE_ATTRIBUTES *)0x8940617c))
(*((mouclass!_MOUSE_ATTRIBUTES *)0x8940617c))                 [Type: _MOUSE_ATTRIBUTES]
    [+0x000] MouseIdentifier  : 0x0 [Type: unsigned short]
    [+0x002] NumberOfButtons  : 0x0 [Type: unsigned short]
    [+0x004] SampleRate       : 0x0 [Type: unsigned short]
    [+0x008] InputDataQueueLength : 0x960 [Type: unsigned long]
0: kd> dt MOUSE_INPUT_DATA 0x89853480
i8042prt!MOUSE_INPUT_DATA
   +0x000 UnitId           : 1
   +0x002 Flags            : 1
   +0x004 Buttons          : 0
   +0x004 ButtonFlags      : 0
   +0x006 ButtonData       : 0
   +0x008 RawButtons       : 0
   +0x00c LastX            : 0n37404
   +0x010 LastY            : 0n32466
   +0x014 ExtraInformation : 0
0: kd> dt MOUSE_INPUT_DATA 0x89853480+18
i8042prt!MOUSE_INPUT_DATA
   +0x000 UnitId           : 1
   +0x002 Flags            : 1
   +0x004 Buttons          : 0
   +0x004 ButtonFlags      : 0
   +0x006 ButtonData       : 0
   +0x008 RawButtons       : 0
   +0x00c LastX            : 0n37404
   +0x010 LastY            : 0n32466
   +0x014 ExtraInformation : 0
0: kd> dt MOUSE_INPUT_DATA 0x89853480+18*2
i8042prt!MOUSE_INPUT_DATA
   +0x000 UnitId           : 1
   +0x002 Flags            : 1
   +0x004 Buttons          : 0
   +0x004 ButtonFlags      : 0
   +0x006 ButtonData       : 0
   +0x008 RawButtons       : 0
   +0x00c LastX            : 0n37404
   +0x010 LastY            : 0n32466
   +0x014 ExtraInformation : 0
0: kd> dt MOUSE_INPUT_DATA 0x8985