Re: Congratulation on Etch release
Paul Slootman wrote:
> Unaligned traps point to code needing fixing, not binutils / whatever.
>
> > radvd (IPv6 support)? Version 1.0-1 of that package is what's generating
> > most of the "unaligned trap" messages I'm seeing.
>
> Network code often displays unaligned traps, because it does a read of
> network data, and then wants to access e.g. a 32-bit value from that;
> and typically that data is somewhere halfway a word and thus not
> aligned. The code needs to be fixed to eg. first copy the data with
> memcpy to an aligned address before accessing the value.
>
> Tracking down where the unaligned access takes place can be done with
> gdb and the address the kernel gives. This could be reported via a bug
> report, perhaps with severity minor. It's worth fixing, as unaligned
> traps cost performance. See also
> http://www.alphalinux.org/archives/debian-alpha/May2001/0062.html
> http://lists.debian.org/debian-alpha/2005/08/msg00051.html
Good info. Now I have some idea where to look. Apologies for missing
the above references in my research. I was (am) basically at the point
Craig Small was -- needing a way to track down and describe the bug in
such a way that code/package maintainers might be motivated to apply an
appropriate fix. The second reference above looks like the ticket as
far as tracking down the offending userspace code.
Many thanks!
--
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Bob Tracy WTO + WIPO = DMCA? http://www.anti-dmca.org
rct@frus.com
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