All symbols starting with `o' in iokit/Kernel

• onThread iokit/Kernel/IOEventSource.cpp:97
• OSDefineMetaClass iokit/Kernel/IOEventSource.cpp:36
• OSDefineMetaClassAndStructors iokit/Kernel/IOCommandGate.cpp:29
• OSKernelStackRemaining iokit/Kernel/IOLib.c:373
• Otherwise iokit/Kernel/IOServicePM.cpp:130