Doug Rabson wrote this message on Sun, Jul 18, 2004 at 21:04 +0100: > > 4) Does the loader know about dcons? Eg, can I do "unload <ret> boot > > kernel.test" using dcons? > > Actually thats the only downside of dcons. It doesn't cut in until the > firewire controller attaches. It relies on the fact that the fwohci > driver allows access to physical memory from any node on the bus > (implemeted in hardware so you can examine the memory of a hung > machine). The dconschat program uses this feature to access the dcons > ring buffers in the target machine. > > I could imagine a dcons driver in the loader which just enabled physical > access and used some kind of loader trick to hand off the ring buffers > to the kernel dcons driver. It doesn't exist though - say nice things > to the author and he might find the time for it :-) You guys might want to check out nextboot.. it's very nice utility that I've been using in my recent kernel debugging... should do what you need to do w/o loader knowing about dcons... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."Received on Fri Jul 23 2004 - 04:16:16 UTC
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