RtlGetNtSystemRoot

WCHAR *__stdcall RtlGetNtSystemRoot(){
  _KSPIN_LOCK *v0; 

  if( PsIsCurrentThreadInServerSilo() )
    return PsGetCurrentServerSiloGlobals(v0)->UserSharedData->NtSystemRoot;
  else
    return(_WORD *)(&KUSER_SHARED_DATA + 48);
}

Referenced by:

AslEnvVarQuery
MiDriverLoadSucceeded
SdbpGetProcessHistory