Date: Fri, 08 Dec 2000 13:11:16 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: Wilko Bulte <wkb@freebie.demon.nl> Cc: Bill Paul <wpaul@FreeBSD.org>, alpha@FreeBSD.org Subject: Re: cvs commit: src/sys/alpha/conf GENERIC Message-ID: <XFMail.001208131116.jhb@FreeBSD.org> In-Reply-To: <20001208212540.A750@freebie.demon.nl>
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On 08-Dec-00 Wilko Bulte wrote: > On Fri, Dec 08, 2000 at 11:23:55AM -0800, John Baldwin wrote: >> >> On 08-Dec-00 Wilko Bulte wrote: >> > On Fri, Dec 08, 2000 at 11:00:04AM -0800, John Baldwin wrote: >> >> [ moved to -alpha ] >> >> >> >> On 08-Dec-00 Bill Paul wrote: >> >> >> mx5# ifconfig tx0 10.0.0.1 >> >> >> >> >> >> fatal kernel trap: >> >> >> >> >> >> trap entry = 0x2 (memory management fault) >> >> >> a0 = 0x464000 >> >> >> a1 = 0x1 >> >> >> a2 = 0x0 >> >> >> pc = 0xfffffc000046b008 >> >> >> ra = 0xfffffc0000469dac >> >> >> curproc = 0xfffffe00042f5e40 >> >> >> pid = 206, comm = ifconfig >> >> >> >> >> >> panic: trap >> >> > >> >> > Hm. This doesn't look like an alignment problem. Unfortunately, I'd >> >> > need >> >> > an EPIC card to fix this, and I don't have one. >> >> >> >> Looks like a NULL dereference. ra is the offending address. Wilko, if >> >> you >> >> have >> >> a kernel.debug laying around, do a gdb -k kernel.debug /dev/mem and then >> >> do >> >> 'l *0xfffffc0000469dac' to get the source line associated with the panic. >> >> Argh, ok. ra is where the function was called. Oops. So now we know it is >> in >> the epic_init_rings() function. Can you do a 'l *' on the pc address? This >> should give us the actual line it died on. > > You mean this? Yes, it looks like sc->rx_desc[i] (pointer arith ugly) is NULL. I can't say more w/o digging into the code though as I don't know how/when the RX descriptors are set up. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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