From owner-freebsd-arm@freebsd.org Thu Nov 5 20:42:14 2015 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3AD54A27DA1 for ; Thu, 5 Nov 2015 20:42:14 +0000 (UTC) (envelope-from lars@e-new.0x20.net) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 1C8721D7E for ; Thu, 5 Nov 2015 20:42:14 +0000 (UTC) (envelope-from lars@e-new.0x20.net) Received: by mailman.ysv.freebsd.org (Postfix) id 18C52A27DA0; Thu, 5 Nov 2015 20:42:14 +0000 (UTC) Delivered-To: arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id F288EA27D9F for ; Thu, 5 Nov 2015 20:42:13 +0000 (UTC) (envelope-from lars@e-new.0x20.net) Received: from mail.0x20.net (mail.0x20.net [IPv6:2001:aa8:fffb:1::3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.0x20.net", Issuer "mail.0x20.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 85EF81D7A for ; Thu, 5 Nov 2015 20:42:13 +0000 (UTC) (envelope-from lars@e-new.0x20.net) Received: from e-new.0x20.net (mail.0x20.net [IPv6:2001:aa8:fffb:1::3]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.0x20.net (Postfix) with ESMTPS id 3E66C6DF91B; Thu, 5 Nov 2015 21:42:10 +0100 (CET) Received: from e-new.0x20.net (localhost [127.0.0.1]) by e-new.0x20.net (8.14.7/8.14.7) with ESMTP id tA5Kg9N7043177; Thu, 5 Nov 2015 21:42:09 +0100 (CET) (envelope-from lars@e-new.0x20.net) Received: (from lars@localhost) by e-new.0x20.net (8.14.7/8.14.7/Submit) id tA5Kg9sF042795; Thu, 5 Nov 2015 21:42:09 +0100 (CET) (envelope-from lars) Date: Thu, 5 Nov 2015 21:42:09 +0100 From: Lars Engels To: Hans Petter Selasky Cc: arm@freebsd.org Subject: Re: [Banana Pi] Fatal kernel mode data abort: 'Alignment Fault' on read Message-ID: <20151105204209.GT66179@e-new.0x20.net> References: <20151105104859.GQ66179@e-new.0x20.net> <563B372E.20607@selasky.org> <20151105120950.GR66179@e-new.0x20.net> <563B4813.1060403@selasky.org> <20151105153423.GS66179@e-new.0x20.net> <563BAA36.60208@selasky.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="zAi3veRTHMyLkSNS" Content-Disposition: inline In-Reply-To: <563BAA36.60208@selasky.org> X-Editor: VIM - Vi IMproved 7.4 X-Operation-System: FreeBSD 8.4-RELEASE-p23 User-Agent: Mutt/1.5.23 (2014-03-12) X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Nov 2015 20:42:14 -0000 --zAi3veRTHMyLkSNS Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Nov 05, 2015 at 08:12:54PM +0100, Hans Petter Selasky wrote: > On 11/05/15 16:34, Lars Engels wrote: > > On Thu, Nov 05, 2015 at 01:14:11PM +0100, Hans Petter Selasky wrote: > >> On 11/05/15 13:09, Lars Engels wrote: > >>> 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/= latest, 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] > >>>> > >>>> Hi, > >>>> > >>>> Could you "objdump -Dx --source /boot/kernel/kernel" and figure out > >>>> 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. > >>> > >> > >> No, you need to find where tcp_input starts, by less-ing it, then add > >> 0x820 to that address and then verify that the assembly instruction > >> there matches. > > > > Ok, I have no idea what I am doing, but here's what I did: > > # objdump -Dx --source /boot/kernel/kernel --start-address=3D"0xc04f5= 1c8" --stop-address=3D"0xC04F59E8" > > > > The result is a 1,3MB text file at: > > http://bsd-geek.de/FreeBSD/objdump.txt > > > > Can you see anything there? > > >=20 > Hi, >=20 > I cannot find "ldr r0, [r5, #4]" at the given location, though if that=20 > is the faulting instruction, it might be related to an unaligned SACK=20 > option. Can you test a new kernel with a patch? I think I could build an image with crochet, so if you have a patch, I can try. --zAi3veRTHMyLkSNS Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQF8BAEBCgBmBQJWO78hXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQ4RjQwMDE3RTRERjUzMTI1N0FGRTUxNDlF NTRDQjM3RDNBMDg5RDZEAAoJEOVMs306CJ1twOoH/0ms7E19D+vSzFLk6sIln6k4 l1xQWJxqp+5lZQLNElxdVoYQGm972/4Am/Qec/srdm1Sj3bTzPlfTSxS8IQAWn9+ npLUoBrCmLmMcEZj6fghXd/KOxycrgTOfPfBGRnHjuuNypWM98EyO2om2S1w9P37 suR/Eya9dDTfGJdYkHKPFXuIAvbiDVEC3WvZnWawuAMgZLxsNL7gVXZGNTkRVo3X ZnGFh7m9kR1nSSHn5eItnzmZBJjTM9bFFL9Hhb4Hz7JKleps0WCgYh9mwrGyXzj1 iYCWGyLt8ZPmdxWuijs/Gmed8790SsOjvVRP/8taaM11Pcr18HUWLneoMK1XT5M= =QXKQ -----END PGP SIGNATURE----- --zAi3veRTHMyLkSNS--