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Date: Sun, 17 Jun 2007 01:38:52 -0600 (MDT)
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To: nathanw@uchicago.edu
From: "M. Warner Losh" <imp@bsdimp.com>
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References: <286AD52D-FCA7-4814-97B7-2870B42488C6@uchicago.edu>
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	Sun, 17 Jun 2007 01:38:22 -0600 (MDT)
Cc: freebsd-arm@FreeBSD.ORG
Subject: Re: PPP Bus Error
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In message: <20070616.223540.-1975970124.imp@bsdimp.com>
            "M. Warner Losh" <imp@bsdimp.com> writes:
: In message: <286AD52D-FCA7-4814-97B7-2870B42488C6@uchicago.edu>
:             Nathan Whitehorn <nathanw@uchicago.edu> writes:
: : I'm trying to establish a PPPoE connection and both ppp and mpd exit  
: : with bus errors, and weird traces. Reading through the list, I see  
: : someone experienced a similar error last year. Because they both  
: : fail, I suspect the bug is in the netgraph ppp stuff (an alignment  
: : bug, maybe?), but I was interested in knowing whether anyone else has  
: : solved this problem already. Thanks,
: 
: I'd check all the alignment of structures.  I suspect that's what's
: doing you in...  Not all the code in the FreeBSD kernel has been
: carefully audited for proper structure alignment.

P.S.  Can you send me a traceback?  Since it is ppp, the userland
program, the bus error is what you get when you do an unaligned
access.

Warner