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【原创】《windows驱动开发技术详解》第4章实验总结二

1 实验要求（WDM驱动）
 

【原创】《windows驱动开发技术详解》第4章实验总结二-LMLPHP

 
2 编写过程
 
2.1 确立整体架构
 
2.1.1 入口函数——DriverEntry
 
（1）作用
  • 设置pDriverObject结构体，注册AddDevice和相关PNP函数，包括IRP_MJ_PNP，IRP_MJ_CREATE等
（2）注意
  • AddDevice在Driver_Object结构体的DriverExtension->AddDevice，原型是NTSTATUS AddDevice (PDRIVER_OBJECT pDriverObject, PDEVICE_OBJECT PhysicaPhysicalDeviceObject)；因为它需要一个最基本的驱动对象以及用于附加的物理设备对象
  • 注册IRP_MJ_PNP请求函数，IRP请求函数的返回值和形参类型都一样
  • 注册IRP_MJ_CREATE、 IRP_MJ_READ、IRP_MJ_WRITE、IRP_MJ_CLOSE请求，这里注册为同一个函数
 
2.1.2 添加设备——AddDevice
 
（1）作用
  • 该函数由系统调用，用于创建设备对象，符号链接、附加到PDO
（2）注意
  • 顺序问题：创建设备对象->符号链接->附加到PDO->设置设备拓展->设置设备对象Flags；符号链接最好紧接放在创建设备对象之后，后面三步位置可以随意，这样做是因为当符号链接创建失败后，要删除设备对象。如果把PDO后面三步放在符号链接前，如果没有对PDO进行脱离，再删除设备对象会产生问题；造成时间浪费。
  • 附加到PDO函数：IoAttachDeviceToDeviceStack，注意返回值，返回的是附加设备的下层设备，如果没有过滤驱动，那么就是PDO。
  • pDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;这一步是必需的，保证设备初始化完毕。
 
2.1.3 驱动卸载——DriverUnLoad
 
（1）作用
  • 这个和NT驱动有点区别，NT驱动要删除设备对象和符号链接，以及释放资源。而WDM的只需要释放资源即可。
（2）注意
  • 返回值为VOID
 
2.1.4 驱动卸载——IRP_MN_REMOVE_DEVICE请求处理
 
（1）作用
  • 删除设备对象和符号链接，脱离PDO
（2）注意
  • 这个请求处理函数，名字自定义，但是返回值NTSTATUS，形参是PDEVICE_OBJECT和PIRP，这和所有PNP请求处理函数都一样
  • 要对IRP的返回状态进行设置，主要是IoStatus.Status和IoStatus.Information
  • IRP请求可以继续向底层转发，IoCallDriver
  • IoDetachDevice的实参是被附加的设备对象
  • 删除时，如果设备对象的NextDevice域不为空也要删除
 
2.1.5 PNP请求处理——IRP_MJ_PNP
 
（1）作用
  • 处理各种类型PNP请求
（2）注意
  • （根据Major分，这是一个大类）IRP_MJ_PNP请求，根据其Minor值还分了多种类型的PNP。
  • 函数内部，主要就是从当前IRP堆栈里获取Minor值，然后再调用相应的处理函数，比如上文的IRP_MN_REMOVE_DEVICE
  • 获取Minor值方法：PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(Irp);ULONG fcn = stack->MinorFunction;
  • 要知道PNP的请求列表，对于IRP_MN类的请求处理，如果是要转发到下一层则可以不用对IoStatus的返回情况进行设置，否则要对其进行设置
 
2.1.6 PNP请求Minor值对应的请求的默认处理
 
（1）作用
  • 处理具体类型PNP请求
（2）注意
  • 对于IRP_MN类的请求处理，如果是要转发到下一层则可以不用对IoStatus的返回情况进行设置，否则要对其进行设置
  • 请求可以转发给下层IoCallDriver，也可以进行完成处理
3 完整代码
 #include <wdm.h>

 typedef struct {

     UNICODE_STRING devName;

     UNICODE_STRING linkName;

     PDEVICE_OBJECT fdo;

     PDEVICE_OBJECT nextStackDevice;

 }DEVICE_EXTENSION, *PDEVICE_EXTENSION;

 #pragma PAGEDCODE

 void dump(PDEVICE_OBJECT pdo)

 {

     PAGED_CODE();

     //显示调试信息

     KdPrint(("-------------------------------------\n"));

     KdPrint(("Begin dump device stack\n"));

     for (int i = ; NULL != pdo; pdo = pdo->AttachedDevice, i++)

     {

         KdPrint(("the %d device in device stack\n", i));

         KdPrint(("device attcheddevice:%#010x", pdo->AttachedDevice));

         KdPrint(("device nextdevice:%#010x", pdo->NextDevice));

         KdPrint(("device stacksize:%d\n", pdo->StackSize));

         KdPrint(("device's driverobject:%#010x", pdo->DriverObject));

     }

     KdPrint(("Dump over\n"));

     KdPrint(("-------------------------------------\n"));

 }

 #pragma PAGEDCODE

 NTSTATUS AddDevice(PDRIVER_OBJECT pDriverObject, PDEVICE_OBJECT PhysicalDeviceObject) //形参不知道

 {

     PAGED_CODE();

     KdPrint(("Enter AddDevice\n"));

     NTSTATUS status;

     PDEVICE_OBJECT pDeviceObject;

     UNICODE_STRING devName, linkName;

     PDEVICE_EXTENSION pDevExt;

     //创建设备对象

     RtlInitUnicodeString(&devName, L"\\Device\\WDM_ChenJiaqi");

     status = IoCreateDevice(pDriverObject, sizeof(DEVICE_EXTENSION), &devName, FILE_DEVICE_UNKNOWN, , TRUE, &pDeviceObject);

     if (!NT_SUCCESS(status))

     {

         return status;

     }

     //创建符号链接

     RtlInitUnicodeString(&linkName, L"\\??\\WDM_ChenJiaqi");

     status = IoCreateSymbolicLink(&linkName, &devName);

     if (!NT_SUCCESS(status))

     {

         IoDeleteDevice(pDeviceObject);

         return status;

     }

     //将FDO附加到PDO之上

     PDEVICE_OBJECT pNextStackDevice = IoAttachDeviceToDeviceStack(pDeviceObject, PhysicalDeviceObject);

     //设置设备扩展

     pDevExt = reinterpret_cast<PDEVICE_EXTENSION>(pDeviceObject->DeviceExtension);

     pDevExt->devName = devName;

     pDevExt->linkName = linkName;

     pDevExt->fdo = pDeviceObject;

     pDevExt->nextStackDevice = pNextStackDevice;

     //设备对象Flags

     pDeviceObject->Flags |= DO_BUFFERED_IO | DO_POWER_PAGABLE;

     pDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;

     dump(pNextStackDevice);

     KdPrint(("Leave AddDevice\n"));

     return STATUS_SUCCESS;

 }

 #pragma PAGEDCODE

 VOID DriverUnLoad(PDRIVER_OBJECT pDriverObject)

 {

     PAGED_CODE();

     //释放内存等相关操作

     pDriverObject;

     KdPrint(("Enter DriverUnLoad\n"));

     KdPrint(("Leave DriverUnLoad\n"));

 }

 #pragma PAGEDCODE

 NTSTATUS DefaultPnpHandler(PDEVICE_EXTENSION pdx, PIRP pIrp)

 {

     PAGED_CODE();

     KdPrint(("Enter DefaultPnpHandler\n"));

     //

     IoSkipCurrentIrpStackLocation(pIrp);

     KdPrint(("Leave DefaultPnpHandler\n"));

     //

     return IoCallDriver(pdx->nextStackDevice, pIrp);

 }

 //对IRP_MN_REMOVE_DEVICE的处理，从DriverUnLoad的功能分离出来

 #pragma PAGEDCODE

 NTSTATUS HandleRemoveDevice(PDEVICE_EXTENSION pDeviceExtension, PIRP pIrp)

 {

     PAGED_CODE();

     KdPrint(("Enter HandleRemoveDevice\n"));

     //设置IRP的完成状态

     pIrp->IoStatus.Status = STATUS_SUCCESS;

     pIrp->IoStatus.Information = ; //读写字节数

     //将IRP请求向底层驱动转发

     NTSTATUS status = DefaultPnpHandler(pDeviceExtension, pIrp); //这个函数由我们自己编写

     //删除符号链接

     IoDeleteSymbolicLink(&pDeviceExtension->linkName);

     //调用IoDetechDevice()把FDO从设备栈脱离开

     IoDetachDevice(pDeviceExtension->nextStackDevice);

     //删除FDO

     IoDeleteDevice(pDeviceExtension->fdo);

     KdPrint(("Leave HandleRemoveDevice\n"));

     return status;

 }

 #pragma PAGEDCODE

 NTSTATUS DefaultDispatchRoutinue(PDEVICE_OBJECT pDeviceObject, PIRP pIrp)

 {

     //对IRP的处理

     PAGED_CODE();

     KdPrint(("Enter DefaultDispatchRoutinue\n"));

     pDeviceObject;

     //设置IRP返回情况

     pIrp->IoStatus.Status = STATUS_SUCCESS;

     pIrp->IoStatus.Information = ;    // no bytes xfered

     //完成对IRP的处理

     IoCompleteRequest(pIrp, IO_NO_INCREMENT);

     KdPrint(("Leave DefaultDispatchRoutinue\n"));

     return STATUS_SUCCESS;

 }

 #pragma PAGEDCODE

 NTSTATUS WDMPnp(IN PDEVICE_OBJECT fdo,IN PIRP Irp)

 {

     PAGED_CODE();

     KdPrint(("Enter HelloWDMPnp\n"));

     NTSTATUS status = STATUS_SUCCESS;

     //得到设备拓展

     PDEVICE_EXTENSION pdx = (PDEVICE_EXTENSION)fdo->DeviceExtension;

     //得到当前IRP堆栈

     PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(Irp);

     //定义函数指针列表

     static NTSTATUS(*fcntab[])(PDEVICE_EXTENSION pdx, PIRP Irp) =

     {

         DefaultPnpHandler,        // IRP_MN_START_DEVICE

         DefaultPnpHandler,        // IRP_MN_QUERY_REMOVE_DEVICE

         HandleRemoveDevice,        // IRP_MN_REMOVE_DEVICE

         DefaultPnpHandler,        // IRP_MN_CANCEL_REMOVE_DEVICE

         DefaultPnpHandler,        // IRP_MN_STOP_DEVICE

         DefaultPnpHandler,        // IRP_MN_QUERY_STOP_DEVICE

         DefaultPnpHandler,        // IRP_MN_CANCEL_STOP_DEVICE

         DefaultPnpHandler,        // IRP_MN_QUERY_DEVICE_RELATIONS

         DefaultPnpHandler,        // IRP_MN_QUERY_INTERFACE

         DefaultPnpHandler,        // IRP_MN_QUERY_CAPABILITIES

         DefaultPnpHandler,        // IRP_MN_QUERY_RESOURCES

         DefaultPnpHandler,        // IRP_MN_QUERY_RESOURCE_REQUIREMENTS

         DefaultPnpHandler,        // IRP_MN_QUERY_DEVICE_TEXT

         DefaultPnpHandler,        // IRP_MN_FILTER_RESOURCE_REQUIREMENTS

         DefaultPnpHandler,        //

         DefaultPnpHandler,        // IRP_MN_READ_CONFIG

         DefaultPnpHandler,        // IRP_MN_WRITE_CONFIG

         DefaultPnpHandler,        // IRP_MN_EJECT

         DefaultPnpHandler,        // IRP_MN_SET_LOCK

         DefaultPnpHandler,        // IRP_MN_QUERY_ID

         DefaultPnpHandler,        // IRP_MN_QUERY_PNP_DEVICE_STATE

         DefaultPnpHandler,        // IRP_MN_QUERY_BUS_INFORMATION

         DefaultPnpHandler,        // IRP_MN_DEVICE_USAGE_NOTIFICATION

         DefaultPnpHandler,        // IRP_MN_SURPRISE_REMOVAL

     };

     //得到IRP的Minor编号，了解它是哪种类型的PNP请求

     ULONG fcn = stack->MinorFunction;

     if (fcn >= sizeof(fcntab) / sizeof(fcntab[]))

     {                        // 未知的子功能代码

         status = DefaultPnpHandler(pdx, Irp); // some function we don't know about

         return status;

     }

     //PNP请求名列表

     static char* fcnname[] =

     {

         "IRP_MN_START_DEVICE",

         "IRP_MN_QUERY_REMOVE_DEVICE",

         "IRP_MN_REMOVE_DEVICE",

         "IRP_MN_CANCEL_REMOVE_DEVICE",

         "IRP_MN_STOP_DEVICE",

         "IRP_MN_QUERY_STOP_DEVICE",

         "IRP_MN_CANCEL_STOP_DEVICE",

         "IRP_MN_QUERY_DEVICE_RELATIONS",

         "IRP_MN_QUERY_INTERFACE",

         "IRP_MN_QUERY_CAPABILITIES",

         "IRP_MN_QUERY_RESOURCES",

         "IRP_MN_QUERY_RESOURCE_REQUIREMENTS",

         "IRP_MN_QUERY_DEVICE_TEXT",

         "IRP_MN_FILTER_RESOURCE_REQUIREMENTS",

         "",

         "IRP_MN_READ_CONFIG",

         "IRP_MN_WRITE_CONFIG",

         "IRP_MN_EJECT",

         "IRP_MN_SET_LOCK",

         "IRP_MN_QUERY_ID",

         "IRP_MN_QUERY_PNP_DEVICE_STATE",

         "IRP_MN_QUERY_BUS_INFORMATION",

         "IRP_MN_DEVICE_USAGE_NOTIFICATION",

         "IRP_MN_SURPRISE_REMOVAL",

     };

     KdPrint(("PNP Request (%s)\n", fcnname[fcn]));

     //!!!根据IRP的MINOR编号，调用相应的请求处理函数

     status = (*fcntab[fcn])(pdx, Irp);

     KdPrint(("Leave HelloWDMPnp\n"));

     return status;

 }

 #pragma INITCODE

 extern "C" NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObject, PUNICODE_STRING pRegisterPath)

 {

     //设置pDriverObject结构体，注册AddDevice和相关PNP函数，包括IRP_MJ_PNP，IRP_MJ_CREATE等

     KdPrint(("Enter DriverEntry\n"));

     pRegisterPath;

     //设置AddDevice函数

     pDriverObject->DriverExtension->AddDevice = AddDevice;

     //注册PNP

     pDriverObject->MajorFunction[IRP_MJ_PNP] = WDMPnp;

     pDriverObject->MajorFunction[IRP_MJ_CREATE] =

         pDriverObject->MajorFunction[IRP_MJ_WRITE] =

         pDriverObject->MajorFunction[IRP_MJ_READ] =

         pDriverObject->MajorFunction[IRP_MJ_CLOSE] = DefaultDispatchRoutinue;

     KdPrint(("Leave DriverEntry\n"));

     return STATUS_SUCCESS;

 }

4 inf文件

;;WDM_Driver inf文件--2015年8月14日

[Version]

Signature = "$Windows NT$"

Class = WDM_Driver

ClassGUID = {EF2962F0-0D55-4bff-B8AA-2221EE8A79B0}

Provider = cposture

DriverVer =

CatalogFile=WDM_Driver.cat

CatalogFile.ntamd64=WDM_Driver.cat

CatalogFile.nt=WDM_Driver.cat

[ClassInstall32.NTamd64]

AddReg=Class_AddReg

[Class_AddReg]

HKR,,,,%DeviceClassName%

HKR,,Icon,,"-5"

[SourceDisksNames]

1 = %DiskName%,,

[SourceDisksFiles]

WDM_Driver层次结构.sys = 1

WDM_Driver层次结构.sys = 1

[DestinationDirs]

DefaultDestDir = 12

my_files_driver = 12

[my_files_driver]

WDM_Driver层次结构.sys

[my_files_driver64]

WDM_Driver层次结构.sys

[Manufacturer]

%MfgName%=Mfg0,NT,NTamd64

[Mfg0.NT]

%DeviceDesc%=InstallLauncher, PCI\VEN_9999&DEV_9999

[Mfg0.NTamd64]

%DeviceDesc%=InstallLauncher, PCI\VEN_9999&DEV_9999

;---------- DDInstall Sections -----------------------------------------------

[InstallLauncher.NT]

CopyFiles=my_files_driver

AddReg=Install_NT_AddReg

[InstallLauncher.NT.Services]

Addservice = WDM_Driver, 0x00000002, Sys_AddService

[Sys_AddService]

DisplayName = %DeviceDesc%

ServiceType = 1

StartType = 3

ErrorControl = 1

ServiceBinary = %12%\WDM_Driver层次结构.sys

[Install_NT_AddReg]

HKLM, "System\CurrentControlSet\Services\WDM_Driver\Parameters","BreakOnEntry", 0x00010001, 0

;---------------------64位支持---------------

[InstallLauncher.NTamd64]

CopyFiles=my_files_driver64

AddReg=Install_NT_AddReg64

[InstallLauncher.NTamd64.Services]

Addservice = WDM_Driver, 0x00000002, Sys_AddService64

[Sys_AddService64]

DisplayName = %DeviceDesc%

ServiceType = 1

StartType = 3

ErrorControl = 1

ServiceBinary = %12%\WDM_Driver层次结构.sys

[Install_NT_AddReg64]

HKLM, "System\CurrentControlSet\Services\WDM_Driver\Parameters","BreakOnEntry", 0x00010001, 0

[Strings]

MfgName="cpostute"

DeviceDesc="WDM_Driver"

DiskName="WDM_Driver Source Disk"

DeviceClassName = WDM_Driver

本文链接：http://www.cnblogs.com/cposture/p/4734288.html

04-26 09:20
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