ioregistryentry :: frompath（）fail

Question

私のiokit kextは失敗しています 古いiMacsで ioregistryのdevicetree平面内の /optionsパスを見つける。他の誰かがこれに遭遇したか、なぜそれが失敗するのか知っていますか？ thx-> adv

  IORegistryEntry* regEntry = IORegistryEntry::fromPath("/options", gIODTPlane);
  if(NULL == regEntry)
  {
    regEntry = IORegistryEntry::fromPath("IODeviceTree:/options");  
    if(NULL == regEntry)
    {
      DEBUG_LOG("getIORegOptionsEntry: FAILURE TO LOCATE: IODeviceTree:/options\n");
    }
  }

Answer 1

The path used to create IORegistryEntry is invalid as per the API: it should begins with a ':'. The I/O plane should not be included in the path, but as the second parameter.