How about setting it up to read the screen buffer during boot.. Maxim Sobolev wrote: > Doug Rabson wrote: > >> On Wed, 2004-07-21 at 15:41, Andrew Gallatin wrote: >> >>> Doug Rabson writes: >>> > 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. >>> >>> Does remote access to physical memory require dcons to be loaded >>> on the target? >> >> >> >> No. The remote access to physical memory is a hardware-implemented >> feature of the firewire ohci hardware. Its enabled in fwohci_attach(). >> In the long term, I would like to restrict this a bit but right now all >> you have to have is fwohci loaded on the target machine. > > > It would be nice to have some sysctl which to disable such access, > since it is BAD THING[tm] from the security POV. > > -Maxim > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to > "freebsd-current-unsubscribe_at_freebsd.org"Received on Fri Jul 23 2004 - 17:14:08 UTC
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