typedef struct _KPRCB
{
     WORD MinorVersion;
     WORD MajorVersion;
     PKTHREAD CurrentThread;
     PKTHREAD NextThread;
     PKTHREAD IdleThread;
     UCHAR Number;
     UCHAR NestingLevel;
     WORD BuildType;
     ULONG SetMember;
     CHAR CpuType;
     CHAR CpuID;
     union
     {
          WORD CpuStep;
          struct
          {
               UCHAR CpuStepping;
               UCHAR CpuModel;
          };
     };
     KPROCESSOR_STATE ProcessorState;
     ULONG KernelReserved[16];
     ULONG HalReserved[16];
     ULONG CFlushSize;
     UCHAR PrcbPad0[88];
     KSPIN_LOCK_QUEUE LockQueue[33];
     PKTHREAD NpxThread;
     ULONG InterruptCount;
     ULONG KernelTime;
     ULONG UserTime;
     ULONG DpcTime;
     ULONG DpcTimeCount;
     ULONG InterruptTime;
     ULONG AdjustDpcThreshold;
     ULONG PageColor;
     UCHAR SkipTick;
     UCHAR DebuggerSavedIRQL;
     UCHAR NodeColor;
     UCHAR PollSlot;
     ULONG NodeShiftedColor;
     PKNODE ParentNode;
     ULONG MultiThreadProcessorSet;
     PKPRCB MultiThreadSetMaster;
     ULONG SecondaryColorMask;
     ULONG DpcTimeLimit;
     ULONG CcFastReadNoWait;
     ULONG CcFastReadWait;
     ULONG CcFastReadNotPossible;
     ULONG CcCopyReadNoWait;
     ULONG CcCopyReadWait;
     ULONG CcCopyReadNoWaitMiss;
     LONG MmSpinLockOrdering;
     LONG IoReadOperationCount;
     LONG IoWriteOperationCount;
     LONG IoOtherOperationCount;
     LARGE_INTEGER IoReadTransferCount;
     LARGE_INTEGER IoWriteTransferCount;
     LARGE_INTEGER IoOtherTransferCount;
     ULONG CcFastMdlReadNoWait;
     ULONG CcFastMdlReadWait;
     ULONG CcFastMdlReadNotPossible;
     ULONG CcMapDataNoWait;
     ULONG CcMapDataWait;
     ULONG CcPinMappedDataCount;
     ULONG CcPinReadNoWait;
     ULONG CcPinReadWait;
     ULONG CcMdlReadNoWait;
     ULONG CcMdlReadWait;
     ULONG CcLazyWriteHotSpots;
     ULONG CcLazyWriteIos;
     ULONG CcLazyWritePages;
     ULONG CcDataFlushes;
     ULONG CcDataPages;
     ULONG CcLostDelayedWrites;
     ULONG CcFastReadResourceMiss;
     ULONG CcCopyReadWaitMiss;
     ULONG CcFastMdlReadResourceMiss;
     ULONG CcMapDataNoWaitMiss;
     ULONG CcMapDataWaitMiss;
     ULONG CcPinReadNoWaitMiss;
     ULONG CcPinReadWaitMiss;
     ULONG CcMdlReadNoWaitMiss;
     ULONG CcMdlReadWaitMiss;
     ULONG CcReadAheadIos;
     ULONG KeAlignmentFixupCount;
     ULONG KeExceptionDispatchCount;
     ULONG KeSystemCalls;
     ULONG PrcbPad1[3];
     PP_LOOKASIDE_LIST PPLookasideList[16];
     GENERAL_LOOKASIDE_POOL PPNPagedLookasideList[32];
     GENERAL_LOOKASIDE_POOL PPPagedLookasideList[32];
     ULONG PacketBarrier;
     LONG ReverseStall;
     PVOID IpiFrame;
     UCHAR PrcbPad2[52];
     VOID * CurrentPacket[3];
     ULONG TargetSet;
     PVOID WorkerRoutine;
     ULONG IpiFrozen;
     UCHAR PrcbPad3[40];
     ULONG RequestSummary;
     PKPRCB SignalDone;
     UCHAR PrcbPad4[56];
     KDPC_DATA DpcData[2];
     PVOID DpcStack;
     LONG MaximumDpcQueueDepth;
     ULONG DpcRequestRate;
     ULONG MinimumDpcRate;
     UCHAR DpcInterruptRequested;
     UCHAR DpcThreadRequested;
     UCHAR DpcRoutineActive;
     UCHAR DpcThreadActive;
     ULONG PrcbLock;
     ULONG DpcLastCount;
     ULONG TimerHand;
     ULONG TimerRequest;
     PVOID PrcbPad41;
     KEVENT DpcEvent;
     UCHAR ThreadDpcEnable;
     UCHAR QuantumEnd;
     UCHAR PrcbPad50;
     UCHAR IdleSchedule;
     LONG DpcSetEventRequest;
     LONG Sleeping;
     ULONG PeriodicCount;
     ULONG PeriodicBias;
     UCHAR PrcbPad5[6];
     LONG TickOffset;
     KDPC CallDpc;
     LONG ClockKeepAlive;
     UCHAR ClockCheckSlot;
     UCHAR ClockPollCycle;
     UCHAR PrcbPad6[2];
     LONG DpcWatchdogPeriod;
     LONG DpcWatchdogCount;
     LONG ThreadWatchdogPeriod;
     LONG ThreadWatchdogCount;
     ULONG PrcbPad70[2];
     LIST_ENTRY WaitListHead;
     ULONG WaitLock;
     ULONG ReadySummary;
     ULONG QueueIndex;
     SINGLE_LIST_ENTRY DeferredReadyListHead;
     UINT64 StartCycles;
     UINT64 CycleTime;
     UINT64 PrcbPad71[3];
     LIST_ENTRY DispatcherReadyListHead[32];
     PVOID ChainedInterruptList;
     LONG LookasideIrpFloat;
     LONG MmPageFaultCount;
     LONG MmCopyOnWriteCount;
     LONG MmTransitionCount;
     LONG MmCacheTransitionCount;
     LONG MmDemandZeroCount;
     LONG MmPageReadCount;
     LONG MmPageReadIoCount;
     LONG MmCacheReadCount;
     LONG MmCacheIoCount;
     LONG MmDirtyPagesWriteCount;
     LONG MmDirtyWriteIoCount;
     LONG MmMappedPagesWriteCount;
     LONG MmMappedWriteIoCount;
     ULONG CachedCommit;
     ULONG CachedResidentAvailable;
     PVOID HyperPte;
     UCHAR CpuVendor;
     UCHAR PrcbPad9[3];
     UCHAR VendorString[13];
     UCHAR InitialApicId;
     UCHAR CoresPerPhysicalProcessor;
     UCHAR LogicalProcessorsPerPhysicalProcessor;
     ULONG MHz;
     ULONG FeatureBits;
     LARGE_INTEGER UpdateSignature;
     UINT64 IsrTime;
     UINT64 SpareField1;
     FX_SAVE_AREA NpxSaveArea;
     PROCESSOR_POWER_STATE PowerState;
     KDPC DpcWatchdogDpc;
     KTIMER DpcWatchdogTimer;
     PVOID WheaInfo;
     PVOID EtwSupport;
     SLIST_HEADER InterruptObjectPool;
     LARGE_INTEGER HypercallPagePhysical;
     PVOID HypercallPageVirtual;
     PVOID RateControl;
     CACHE_DESCRIPTOR Cache[5];
     ULONG CacheCount;
     ULONG CacheProcessorMask[5];
     UCHAR LogicalProcessorsPerCore;
     UCHAR PrcbPad8[3];
     ULONG PackageProcessorSet;
     ULONG CoreProcessorSet;
} KPRCB, *PKPRCB;

Windows Vista Kernel Structures