NtQueryTimer

NTSTATUS __stdcall NtQueryTimer(
        VOID *TimerHandle,
        _TIMER_INFORMATION_CLASS TimerInformationClass,
        VOID *TimerInformation,
        UINT64 TimerInformationLength,
        UINT64 *ReturnLength){
  char PreviousMode; 
  __int64 v9; 
  __int64 v10; 
  UINT64 *v11; 
  int v12; 
  int v13; 
  __int64 v14; 
  UINT64 v15; 
  PVOID Object; 

  if( TimerInformationClass )
    return -1073741821;
  if( (_DWORD)TimerInformationLength != 16 )
    return -1073741820;
  PreviousMode = KeGetCurrentThread()->PreviousMode;
  if( PreviousMode )
  {
    if( ((unsigned __int8)TimerInformation & 3) != 0 )
      ExRaiseDatatypeMisalignment();
    v9 = 0x7FFFFFFF0000i64;
    v10 = 0x7FFFFFFF0000i64;
    if( (unsigned __int64)TimerInformation < 0x7FFFFFFF0000i64 )
      v10 = (__int64)TimerInformation;
    *(_BYTE *)v10 = *(_BYTE *)v10;
    *(_BYTE *)(v10 + 15) = *(_BYTE *)(v10 + 15);
    v11 = ReturnLength;
    if( ReturnLength )
    {
      if( (unsigned __int64)ReturnLength < 0x7FFFFFFF0000i64 )
        v9 = (__int64)ReturnLength;
      *(_DWORD *)v9 = *(_DWORD *)v9;
    }
  }
  else
  {
    v11 = ReturnLength;
  }
  Object = 0i64;
  v12 = ObReferenceObjectByHandle(TimerHandle, 1ui64, ExTimerObjectType, PreviousMode, &Object, 0i64);
  if( v12 >= 0 )
  {
    v13 = *((_DWORD *)Object + 1);
    v14 = *(_QWORD *)&KUSER_SHARED_DATA.InterruptTime.LowPart;
    v15 = KeQueryTimerDueTime((_KTIMER *)Object) - v14;
    HalPutDmaAdapter((PADAPTER_OBJECT)Object);
    if( PreviousMode )
    {
      *((_BYTE *)TimerInformation + 8) = v13;
      *(_QWORD *)TimerInformation = v15;
      if( v11 )
        *(_DWORD *)v11 = 16;
    }
    else
    {
      *((_BYTE *)TimerInformation + 8) = v13;
      *(_QWORD *)TimerInformation = v15;
      if( v11 )
        *(_DWORD *)v11 = 16;
    }
  }
  return v12;
}

Referenced by: