在驱动开发中我们有时需要得到驱动自身是否被加载成功的状态，这个功能看似没啥用实际上在某些特殊场景中还是需要的，如下代码实现了判断当前驱动是否加载成功，如果加载成功, 则输出该驱动的详细路径信息。

该功能实现的核心函数是NtQuerySystemInformation这是一个微软未公开的函数，也没有文档化，不过我们仍然可以通过动态指针的方式调用到它，该函数可以查询到很多系统信息状态，首先需要定义一个指针。

typedef NTSTATUS(*NTQUERYSYSTEMINFORMATION)(
IN ULONG SystemInformationClass,
OUT PVOID   SystemInformation,
IN ULONG_PTR    SystemInformationLength,
OUT PULONG_PTR  ReturnLength OPTIONAL);

其次还需要一个SYSTEM_MODULE_INFORMATION该结构内可以得到模块入口信息模块名称等，调用NtQuerySystemInformation数据会被格式化为SYSTEM_MODULE_INFORMATION方便调用。

typedef struct _SYSTEM_MODULE_INFORMATION {
	HANDLE Section;
	PVOID MappedBase;
	PVOID Base;
	ULONG Size;
	ULONG Flags;
	USHORT LoadOrderIndex;
	USHORT InitOrderIndex;
	USHORT LoadCount;
	USHORT PathLength;
	CHAR ImageName[256];
} SYSTEM_MODULE_INFORMATION, *PSYSTEM_MODULE_INFORMATION;

最后是SYSTEM_INFORMATION_CLASS该结构同样是一个未文档化的结构体，本此代码中需要用到的枚举类型是SystemModuleInformation其他类型也放这里后期做参考用。

typedef enum _SYSTEM_INFORMATION_CLASS
{
	SystemBasicInformation = 0x0,
	SystemProcessorInformation = 0x1,
	SystemPerformanceInformation = 0x2,
	SystemTimeOfDayInformation = 0x3,
	SystemPathInformation = 0x4,
	SystemProcessInformation = 0x5,
	SystemCallCountInformation = 0x6,
	SystemDeviceInformation = 0x7,
	SystemProcessorPerformanceInformation = 0x8,
	SystemFlagsInformation = 0x9,
	SystemCallTimeInformation = 0xa,
	SystemModuleInformation = 0xb,
	SystemLocksInformation = 0xc,
	SystemStackTraceInformation = 0xd,
	SystemPagedPoolInformation = 0xe,
	SystemNonPagedPoolInformation = 0xf,
	SystemHandleInformation = 0x10,
	SystemObjectInformation = 0x11,
	SystemPageFileInformation = 0x12,
	SystemVdmInstemulInformation = 0x13,
	SystemVdmBopInformation = 0x14,
	SystemFileCacheInformation = 0x15,
	SystemPoolTagInformation = 0x16,
	SystemInterruptInformation = 0x17,
	SystemDpcBehaviorInformation = 0x18,
	SystemFullMemoryInformation = 0x19,
	SystemLoadGdiDriverInformation = 0x1a,
	SystemUnloadGdiDriverInformation = 0x1b,
	SystemTimeAdjustmentInformation = 0x1c,
	SystemSummaryMemoryInformation = 0x1d,
	SystemMirrorMemoryInformation = 0x1e,
	SystemPerformanceTraceInformation = 0x1f,
	SystemObsolete0 = 0x20,
	SystemExceptionInformation = 0x21,
	SystemCrashDumpStateInformation = 0x22,
	SystemKernelDebuggerInformation = 0x23,
	SystemContextSwitchInformation = 0x24,
	SystemRegistryQuotaInformation = 0x25,
	SystemExtendServiceTableInformation = 0x26,
	SystemPrioritySeperation = 0x27,
	SystemVerifierAddDriverInformation = 0x28,
	SystemVerifierRemoveDriverInformation = 0x29,
	SystemProcessorIdleInformation = 0x2a,
	SystemLegacyDriverInformation = 0x2b,
	SystemCurrentTimeZoneInformation = 0x2c,
	SystemLookasideInformation = 0x2d,
	SystemTimeSlipNotification = 0x2e,
	SystemSessionCreate = 0x2f,
	SystemSessionDetach = 0x30,
	SystemSessionInformation = 0x31,
	SystemRangeStartInformation = 0x32,
	SystemVerifierInformation = 0x33,
	SystemVerifierThunkExtend = 0x34,
	SystemSessionProcessInformation = 0x35,
	SystemLoadGdiDriverInSystemSpace = 0x36,
	SystemNumaProcessorMap = 0x37,
	SystemPrefetcherInformation = 0x38,
	SystemExtendedProcessInformation = 0x39,
	SystemRecommendedSharedDataAlignment = 0x3a,
	SystemComPlusPackage = 0x3b,
	SystemNum