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#include <ntddk.h>
#include <string.h>
#include "crashdrv.h"
#define MEMSIZE 4096
#define FCN(cc) ((cc >> 2) & 0xFFFFFF)
#define DEVICE_NAME L"\\Device\\CrashDrv"
#define DOSDEVICE_NAME L"\\DosDevices\\CrashDrv"
typedef VOID (*PTESTFUNC)(PULONG ub);
PTESTFUNC tests[] =
{
NULL,
CrashDrvBugCheck,
CrashDrvStackOverFlow,
CrashDrvSimpleTest,
CrashDrvExceptionTest,
CrashDrvHardError,
CrashSpecial
};
#define MaxTests (sizeof(tests)/sizeof(PTESTFUNC))
ULONG CrashDrvRequest;
KEVENT CrashEvent;
ULONG CrashRequest;
PULONG Funk;
NTSTATUS
CrashDrvOpenClose(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
VOID
CrashDrvUnload(
IN PDRIVER_OBJECT DriverObject
);
NTSTATUS
CrashDrvIoControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
VOID
CrashThread(
PVOID Context
);
NTSTATUS
DriverEntry(
IN PDRIVER_OBJECT DriverObject,
IN PUNICODE_STRING RegistryPath
)
{
UNICODE_STRING DeviceName;
PDEVICE_OBJECT deviceObject;
NTSTATUS status;
UNICODE_STRING LinkObject;
WCHAR LinkName[80];
ULONG DeviceSize;
HANDLE ThreadHandle;
RtlInitUnicodeString( &DeviceName, DEVICE_NAME );
status = IoCreateDevice( DriverObject,
0,
&DeviceName,
FILE_DEVICE_NULL,
0,
FALSE,
&deviceObject );
if (!NT_SUCCESS( status )) {
return status;
}
LinkName[0] = UNICODE_NULL;
RtlInitUnicodeString(&LinkObject, LinkName);
LinkObject.MaximumLength = sizeof(LinkName);
RtlAppendUnicodeToString(&LinkObject, L"\\DosDevices");
DeviceSize = sizeof(L"\\Device") - sizeof(UNICODE_NULL);
DeviceName.Buffer += DeviceSize / sizeof(WCHAR);
DeviceName.Length -= (USHORT)DeviceSize;
RtlAppendUnicodeStringToString(&LinkObject, &DeviceName);
DeviceName.Buffer -= DeviceSize / sizeof(WCHAR);
DeviceName.Length += (USHORT)DeviceSize;
status = IoCreateSymbolicLink(&LinkObject, &DeviceName);
if (!NT_SUCCESS(status)) {
IoDeleteDevice( deviceObject );
return status;
}
DriverObject->MajorFunction[IRP_MJ_CREATE] = CrashDrvOpenClose;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = CrashDrvOpenClose;
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = CrashDrvIoControl;
DriverObject->DriverUnload = CrashDrvUnload;
KeInitializeEvent( &CrashEvent, NotificationEvent, FALSE );
Funk = ExAllocatePool( PagedPool, MEMSIZE );
status = PsCreateSystemThread(
&ThreadHandle,
0,
NULL,
0,
NULL,
CrashThread,
NULL
);
return STATUS_SUCCESS;
}
NTSTATUS
CrashDrvOpenClose(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
{
NTSTATUS status = STATUS_SUCCESS;
Irp->IoStatus.Status = status;
Irp->IoStatus.Information = 0;
status = Irp->IoStatus.Status;
IoCompleteRequest( Irp, 0 );
return status;
}
VOID
CrashDrvUnload(
IN PDRIVER_OBJECT DriverObject
)
{
PDEVICE_OBJECT currentDevice = DriverObject->DeviceObject;
UNICODE_STRING fullLinkName;
while (currentDevice) {
RtlInitUnicodeString( &fullLinkName, DOSDEVICE_NAME );
IoDeleteSymbolicLink(&fullLinkName);
IoDeleteDevice(currentDevice);
currentDevice = DriverObject->DeviceObject;
}
}
NTSTATUS
CrashDrvIoControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
{
NTSTATUS Status = STATUS_SUCCESS;
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
PULONG ub;
ub = (PULONG) MmGetSystemAddressForMdl( Irp->MdlAddress );
if (IrpSp->Parameters.DeviceIoControl.IoControlCode == IOCTL_CRASHDRV_CHECK_REQUEST) {
ub[0] = CrashDrvRequest;
CrashDrvRequest = 0;
} else {
if (FCN(IrpSp->Parameters.DeviceIoControl.IoControlCode) > MaxTests) {
DbgBreakPoint();
} else {
tests[FCN(IrpSp->Parameters.DeviceIoControl.IoControlCode)]( ub );
}
}
Irp->IoStatus.Information = 0L;
Irp->IoStatus.Status = Status;
IoCompleteRequest( Irp, 0 );
return Status;
}
VOID
CrashThread(
PVOID Context
)
{
while( TRUE ) {
KeWaitForSingleObject( &CrashEvent, Executive, KernelMode, FALSE, NULL );
KeResetEvent( &CrashEvent );
switch( CrashRequest ) {
case KMODE_EXCEPTION_NOT_HANDLED:
{
ULONG i,j;
i = 0;
j = 0;
i = j / i;
}
break;
case IRQL_NOT_LESS_OR_EQUAL:
{
KIRQL irql;
KeRaiseIrql( DISPATCH_LEVEL, &irql );
Funk[0] = 0;
KeLowerIrql( irql );
}
break;
}
}
}
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