From owner-freebsd-arm@FreeBSD.ORG  Fri Feb 19 03:44:50 2010
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From: "M. Warner Losh" <imp@bsdimp.com>
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Cc: kostikbel@gmail.com, arm@freebsd.org, current@freebsd.org
Subject: Re: bind fails with sig11 on start / pthread failure on ARM?
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In message: <20100219033000.GZ43625@cicely7.cicely.de>
            Bernd Walter <ticso@cicely7.cicely.de> writes:
: On Fri, Feb 19, 2010 at 04:12:00AM +0100, Bernd Walter wrote:
: > On Thu, Feb 18, 2010 at 03:10:10PM +0200, Kostik Belousov wrote:
: > > On Thu, Feb 18, 2010 at 01:49:07PM +0100, Bernd Walter wrote:
: > > > On Tue, Feb 16, 2010 at 07:39:51PM +0100, Bernd Walter wrote:
: > > > > On Mon, Feb 15, 2010 at 10:39:07PM +0100, Bernd Walter wrote:
: > [Switching to thread 4 (Thread 20804140 (LWP 100053))]#0  0x0015755c in isc_atomic_cmpxchg ()
: > (gdb) bt
: > #0  0x0015755c in isc_atomic_cmpxchg ()
: > #1  0x00157dac in isc_rwlock_lock ()
: > #2  0x000f9790 in dns_db_register ()
: > #3  0x0004d590 in dns_sdb_register ()
: > #4  0x0000c974 in ns_builtin_init ()
: > #5  0x0001aa90 in $a ()
: > #6  0x0001aa90 in $a ()
: > 
: > isc_atomic_cmpxchg really sounds quite interesting though.
: > It is not only the crashing function it is also a type of function which
: > sounds error prune.
: 
: For me it looks like a bug in bind itself.
: It is in contrib/bind9/lib/isc/arm/include/isc/atomic.h.
: My assumption is that either the assembly is broken or it gets an
: invalid pointer.
: I'm not very expirienced with ARM assembly.
: Warner - it names you in the copyright, so very likely you know this code.
: I will build a debug version of bind, but as usual it will take some
: time...

Damn.  It wasn't me.

Oh, wait, maybe it was...

I'll try to look at it tomorrow...

Warner