Date: Wed, 15 May 2002 17:46:18 -0400 (EDT) From: Andrew Gallatin <gallatin@cs.duke.edu> To: Rich Bud <rbud@fortean.com> Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: natd sig 10 under stable Message-ID: <15586.55082.170680.378288@grasshopper.cs.duke.edu> In-Reply-To: <20020515160407.T28044-100000@nemesis.fortean.com> References: <20020515160407.T28044-100000@nemesis.fortean.com>
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Rich Bud writes:
> BTW, Craig Burgess posted about a sig 10 in natd back in february under
> different conditions. I didn't see any replies, so i'm guessing this is
> the same problem...
Probably, but this is much more useful information that Craig was ever
able to supply. With your information, it may be possible to diagnose
& fix the problem.
> Program received signal SIGBUS, Bus error.
> 0x120008614 in AliasHandleQuestion (count=1, q=0x11feb911, pmax=0x11feb926 "", nbtarg=0x11feb838) at /usr/src/lib/libalias/alias_nbt.c:290
> 290 switch ( ntohs(q->type) ) {
> (gdb) ptype q
> type = struct {
> u_short type;
> u_short class;
> } *
> q = (NBTNsQuestion *) 0x11feb911, q->class = 1, q->type = 0
>
This address is unaligned. Is one of machdep.unaligned_sigbus
== 1, machdep.unaligned_fix == 0 true? (or the uac equivalent)
If not, perhaps the unaligned fixup handler needs to be enhanced to
handle a new sort of instruction. Can you disassemble the code at the
faulting PC & see what instruction generated the access, please?
(or enable unaligned printing via uac -p in the shell which starts natd).
Thanks,
Drew
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