NtWaitForSingleObject

NTSTATUS __fastcall NtWaitForSingleObject(UINT64 a1, INT8 a2, UINT64 a3){
  char PreviousMode; 
  UINT64 Timeout; 
  _LARGE_INTEGER v7; 

  v7.QuadPart = 0i64;
  PreviousMode = KeGetCurrentThread()->PreviousMode;
  Timeout = a3;
  if( a3 && PreviousMode )
  {
    if( a3 >= 0x7FFFFFFF0000i64 )
      Timeout = 0x7FFFFFFF0000i64;
    v7 = *(_LARGE_INTEGER *)Timeout;
    Timeout = (UINT64)&v7;
  }
  return ObWaitForSingleObject((VOID *)a1, PreviousMode, PreviousMode, a2, (_LARGE_INTEGER *)Timeout);
}

Referenced by:

PfSnPrefetchFileMetadata
SepRmCallLsa