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Date:      Mon, 10 Apr 2000 18:04:41 -0400 (EDT)
From:      Andrew Gallatin <gallatin@cs.duke.edu>
To:        Todd Cohen <cohentl@clarkson.edu>
Cc:        freebsd-alpha@FreeBSD.ORG
Subject:   Re: unaligned access
Message-ID:  <14578.20128.272421.32560@grasshopper.cs.duke.edu>
In-Reply-To: <Pine.GSO.4.10.10004101751430.10228-100000@isis.aoc.clarkson.edu>
References:  <Pine.GSO.4.10.10004101751430.10228-100000@isis.aoc.clarkson.edu>

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Todd Cohen writes:
 > Hey guys,
 > 	I just installed FreeBSD 4.0/AXP the other day, switching from
 > linux and netbsd. I used to have some applications working perfectly on
 > Linux/AXP, but when I've tried using them on FreeBSD, I get the
 > following..
 > 
 > 
 > pid 90910 (gaim): unaligned access: va=0x11ffa07c pc=0x16052e24c


They're caused by the application doing an unaligned access.  You can
either fix them or shut them up.  Fixing them is greatly preferreable
because fixing them is rather expensive (the app traps into the
kernel, which fixes up the access).

See the uac(1) man page.  If you want to fix them, use uac -s & run
gdb on the app.  If you just want to shut up the warning, use uac -p.

As to why you see them on FreeBSD & not linux; I think some linux
distros may come with uac printing turned off...

Drew

------------------------------------------------------------------------------
Andrew Gallatin, Sr Systems Programmer	http://www.cs.duke.edu/~gallatin
Duke University				Email: gallatin@cs.duke.edu
Department of Computer Science		Phone: (919) 660-6590




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