First, a gentle nudge. The registered ports are reserved for system library use. You should not be attempting to use them for your own services. We may likely use those slots for other system services in the future, and your software will not be compatible with that use. You should use the bootstrap namespace to pass ports between processes. If exposing the ports to other tasks is a problem, you can create a private bootstrap subset for passing ports shared between the parent and child only. At first, I was suspicious. That's too easy to cause a panic. But I get it too. I'll let you know when there is a fix. But it is triggered by a flaw in your logic. You created a receive right, and then made a call which assumed you have a send right as well (mach_ports_register() is defined to copy each of the send rights specified in the slots array into the kernel). You have to insert a send right (using mach_port_insert_right() or mach_port_extract_right()) for your newly created port before making the call. Of course, this should just return an error. As I said, I'm looking into why that isn't so. ;-( On Tuesday, August 13, 2002, at 02:04 PM, Joshua LeVasseur wrote: Hello. I run Darwin 1.4.1 on a Pismo. Just a plain Darwin install; not OS X. From sysctl: kern.osrelease = 1.4.1 kern.osrevision = 199506 kern.version = Darwin Kernel Version 1.4.1: Sun Sep 30 20:54:21 PDT 2001; root:xnu-201.roots/xnu-201.obj/RELEASE_PPC I cause a kernel panic when using mach_ports_register(). The offending code: --------------- mach_port_t *registered_ports; mach_msg_type_number_t count; mach_port_t my_service_port; mach_port_allocate( mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &my_service_port ); mach_ports_lookup( mach_task_self(), ®istered_ports, &count ); registered_ports[ ENVIRONMENT_SLOT ] = my_service_port; mach_ports_register( mach_task_self(), registered_ports, count ); ---------------- Sorry if this is an inappropriate forum for this info ... I'm new to Apple's Darwin resources and haven't figured out where to submit bugs. -jtl _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.