乙個簡單的串列埠過濾驅動

學習驅動開發一段時間了，在嘗試著從最簡單的驅動開發著手學習，我再嘗試著編寫乙個最簡單的串列埠過濾驅動，可是多次嘗試都沒有成功，總是一載入就藍屏。看了網上的例子他們都是採用的ioattachdevicetodevicestack，而我採用的是ioattachdevice，現在把網上的**整理成最簡單的形式給大家分享一下，希望初學者能從中受益。我會再後面的部落格裡詳細介紹。

#include #include static pdevice_object m_fltobj;

static pdevice_object m_topobj;
//定義乙個讀的完成處理函式
ntstatus fengreadcomplete(in pdevice_object deviectobject, in pirp irp, in pvoid context)
dbgprint("\r\n");
} if( irp->pendingreturned)
iomarkirppending( irp);
return irp->iostatus.status;
}ntstatus driver1_dispatchdevicecontrol(in pdevice_object deviceobject,in pirp irp)
else if(irpsp->majorfunction == irp_mj_write)
dbgprint("\r\n");
} else if(irpsp->majorfunction == irp_mj_read)
ioskipcurrentirpstacklocation(irp);
return iocalldriver(m_topobj, irp);
} irp->iostatus.information = 0;
irp->iostatus.status = status_invalid_parameter;
iocompleterequest(irp, io_no_increment);
return status;
}void driver1_driverunload(in pdriver_object driverobject)
#pragma code_seg("init")
ntstatus driverentry(in out pdriver_object driverobject,in punicode_string registrypath)
driverobject->driverunload = driver1_driverunload;
rtlinitunicodestring(&namestr, l"\\device\\serial0");
status = iogetdeviceobjectpointer( &namestr, file_all_access, &fileobj, &devobj);
if(status == status_success)
obdereferenceobject(fileobj);
if(status == status_success)
dbgprint(("driverentry 成功\r\n"));
m_topobj= topdev;
m_fltobj->flags &= ~do_device_initializing;
return status_success;
} return status_success;
}

#include #include static pdevice_object m_fltobj;

static pdevice_object m_topobj;
ntstatus driver1_dispatchdevicecontrol(in pdevice_object deviceobject,in pirp irp)
void driver1_driverunload(in pdriver_object driverobject)
#pragma code_seg("init")
ntstatus driverentry(in out pdriver_object driverobject,in punicode_string registrypath)
driverobject->driverunload = driver1_driverunload;
rtlinitunicodestring(&namestr, l"\\device\\serial0");
status = iogetdeviceobjectpointer( &namestr, file_all_access, &fileobj, &devobj);
if(status == status_success)
obdereferenceobject(fileobj);
if(status == status_success)
dbgprint(("driverentry 成功\r\n"));
m_topobj= topdev;
m_fltobj->flags &= ~do_device_initializing;
return status_success;
} return status_success;
}

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