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From: John Baldwin <jhb@freebsd.org>
To: Roar Pettersen <roar.pettersen@uib.no>
Date: Tue, 3 Feb 2009 13:40:08 -0500
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Cc: freebsd-gnats-submit@freebsd.org, freebsd-amd64@freebsd.org
Subject: Re: amd64/131209: 7.1-STABLE amd64 crash
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On Tuesday 03 February 2009 1:02:04 pm Roar Pettersen wrote:
> Hello !
> 
> > Hmm, it shouldn't be faulting here. :(  Can you do 'p m0' 'p 
sw_rx_cons_idx'
> > and 'p sc->rx_mbuf_ptr[sw_rx_cons_idx]'?  Also, 'x/i 0xffffffff8021d746'.
> 
> 
> (kgdb) p m0
> No symbol "m0" in current context.
> (kgdb) p sw_rx_cons_idx
> No symbol "sw_rx_cons_idx" in current context.
> (kgdb) p sc->rx_mbuf_ptr[sw_rx_cons_idx]
> No symbol "sc" in current context.

You have to be at 'frame 8' for these to work.

> (kgdb) x/i 0xffffffff8021d746
> 0xffffffff8021d746 <bce_intr+710>:      mov    0x10(%r14),%r10

Ok, so %r14 is presumably NULL.  Looking at the disassembly, I think m0 is 
NULL.  This is a bug in bce(4) of some sort.  You can try e-mailing davidch@.

-- 
John Baldwin