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Date:      Thu, 5 Nov 2015 13:09:50 +0100
From:      Lars Engels <lars.engels@0x20.net>
To:        Hans Petter Selasky <hps@selasky.org>
Cc:        arm@freebsd.org
Subject:   Re: [Banana Pi] Fatal kernel mode data abort: 'Alignment Fault' on read
Message-ID:  <20151105120950.GR66179@e-new.0x20.net>
In-Reply-To: <563B372E.20607@selasky.org>
References:  <20151105104859.GQ66179@e-new.0x20.net> <563B372E.20607@selasky.org>

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On Thu, Nov 05, 2015 at 12:02:06PM +0100, Hans Petter Selasky wrote:
> On 11/05/15 11:48, Lars Engels wrote:
> > Using FreeBSD-armv6-11.0-A20-290366.img I can reproducible crash the
> > kernel by USB-tethering the Banana Pi to a mobile phone and run "
> > pkg bootstrap". It looks like this:
> >
> > root@bananapi:/ # pkg bootstrap
> > The package management tool is not yet installed on your system.
> > Do you want to fetch and install it now? [y/N]: y
> > Bootstrapping pkg from pkg+http://pkg.FreeBSD.org/FreeBSD:11:armv6/late=
st, please wait...
> > Fatal kernel mode data abort: 'Alignment Fault' on read
> > trapframe: 0xea576a90
> > FSR=3D00000001, FAR=3Dc43a1d6e, spsr=3D60000113
> > r0 =3D00000014, r1 =3D0000003c, r2 =3D0000003c, r3 =3D00000903
> > r4 =3D00000000, r5 =3Dc43a1d6a, r6 =3D00000028, r7 =3Dc43a1d56
> > r8 =3D00000000, r9 =3D00000014, r10=3D00000028, r11=3Dea576bf8
> > r12=3D00000000, ssp=3Dea576b20, slr=3Dc061aba4, pc =3Dc04f68e8
> >
> > [ thread pid 13 tid 100024 ]
> > Stopped at      tcp_input+0x820:        ldr     r0, [r5, #0x004]
>=20
> Hi,
>=20
> Could you "objdump -Dx --source /boot/kernel/kernel" and figure out=20
> which code line "tcp_input+0x820" corresponds to?

You mean like "objdump ... | grep -C10 tcp_input+0x820"?

I started that half an hour ago and it's still not finished.

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