From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Sun, 31 Oct 2004 19:26:59 +0000 (GMT) Received: from lug-owl.de ([IPv6:::ffff:195.71.106.12]:3297 "EHLO lug-owl.de") by linux-mips.org with ESMTP id ; Sun, 31 Oct 2004 19:26:54 +0000 Received: by lug-owl.de (Postfix, from userid 1001) id D57F34AB6C; Sun, 31 Oct 2004 20:26:53 +0100 (CET) Date: Sun, 31 Oct 2004 20:26:53 +0100 From: Jan-Benedict Glaw To: Dennis Grevenstein Cc: linux-mips@linux-mips.org Subject: Re: unable to handle kernel paging request Message-ID: <20041031192653.GG2094@lug-owl.de> Mail-Followup-To: Dennis Grevenstein , linux-mips@linux-mips.org References: <20041031184233.GA11120@aton.pcde.inka.de> <20041031191631.GB11681@aton.pcde.inka.de> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="j2AXaZ4YhVcLc+PQ" Content-Disposition: inline In-Reply-To: <20041031191631.GB11681@aton.pcde.inka.de> X-Operating-System: Linux mail 2.6.8-rc4 X-gpg-fingerprint: 250D 3BCF 7127 0D8C A444 A961 1DBD 5E75 8399 E1BB X-gpg-key: wwwkeys.de.pgp.net User-Agent: Mutt/1.5.6+20040907i Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 6234 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: jbglaw@lug-owl.de Precedence: bulk X-list: linux-mips --j2AXaZ4YhVcLc+PQ Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, 2004-10-31 20:16:31 +0100, Dennis Grevenstein wrote in message <20041031191631.GB11681@aton.pcde.inka.de>: > On Sun, Oct 31, 2004 at 07:48:15PM +0100, Stanislaw Skowronek wrote: > > > <1>CPU 0 Unable to handle kernel paging request at\ > > > virtual address 00000000, epc =3D=3D 8810da1c, ra =3D=3D 8810e22c > >=20 > > Look into your System.map and tell us what is there. > =20 > At 8810da1c or 8810e22c? Nothing directly. > Closest thing is this: System.map is a list of function start addresses. Typically, functions don't crash at their very first instructions, this is why you don't see "exact" matches. > 8810d9b0 t ip22zilog_maybe_update_regs > 8810d9fc t ip22zilog_receive_chars This is epc (+0x20). > 8810dd18 t ip22zilog_status_handle > 8810def0 t ip22zilog_transmit_chars > 8810e0e0 t ip22zilog_interrupt =2E..and this is ra. > 8810e26c t ip22zilog_tx_empty >>From my fading MIPS knowledge, ip22zilog_interrupt called ip22zilog_receive_chars and the later one crashed. Now, use objdump and create a disassembly dump of the object file that contains the IP22 Zilog stuff. There, find the part that's 0x20 bytes away from the start of ip22zilog_receive_chars. Now you know the cause of this oops. From here, try to figure out the reason for it... MfG, JBG --=20 Jan-Benedict Glaw jbglaw@lug-owl.de . +49-172-7608481 = _ O _ "Eine Freie Meinung in einem Freien Kopf | Gegen Zensur | Gegen Krieg = _ _ O fuer einen Freien Staat voll Freier B=FCrger" | im Internet! | im Irak! = O O O ret =3D do_actions((curr | FREE_SPEECH) & ~(NEW_COPYRIGHT_LAW | DRM | TCPA)= ); --j2AXaZ4YhVcLc+PQ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) iD8DBQFBhTx9Hb1edYOZ4bsRAkYSAJwLbPffuXF7PBQ1QBrB5HL7nEhWQACeOkyK kaZT7PBUY/flH9uuSsF8ZSs= =/RBU -----END PGP SIGNATURE----- --j2AXaZ4YhVcLc+PQ-- From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sun, 31 Oct 2004 20:26:53 +0100 From: Jan-Benedict Glaw Subject: Re: unable to handle kernel paging request Message-ID: <20041031192653.GG2094@lug-owl.de> References: <20041031184233.GA11120@aton.pcde.inka.de> <20041031191631.GB11681@aton.pcde.inka.de> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="j2AXaZ4YhVcLc+PQ" Content-Disposition: inline In-Reply-To: <20041031191631.GB11681@aton.pcde.inka.de> Return-Path: Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org To: Dennis Grevenstein Cc: linux-mips@linux-mips.org Message-ID: <20041031192653.iBDHgnxq2cnfZVUZ_jYNLJDrda3poN_e25E02mjnMhw@z> --j2AXaZ4YhVcLc+PQ Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, 2004-10-31 20:16:31 +0100, Dennis Grevenstein wrote in message <20041031191631.GB11681@aton.pcde.inka.de>: > On Sun, Oct 31, 2004 at 07:48:15PM +0100, Stanislaw Skowronek wrote: > > > <1>CPU 0 Unable to handle kernel paging request at\ > > > virtual address 00000000, epc =3D=3D 8810da1c, ra =3D=3D 8810e22c > >=20 > > Look into your System.map and tell us what is there. > =20 > At 8810da1c or 8810e22c? Nothing directly. > Closest thing is this: System.map is a list of function start addresses. Typically, functions don't crash at their very first instructions, this is why you don't see "exact" matches. > 8810d9b0 t ip22zilog_maybe_update_regs > 8810d9fc t ip22zilog_receive_chars This is epc (+0x20). > 8810dd18 t ip22zilog_status_handle > 8810def0 t ip22zilog_transmit_chars > 8810e0e0 t ip22zilog_interrupt =2E..and this is ra. > 8810e26c t ip22zilog_tx_empty >From my fading MIPS knowledge, ip22zilog_interrupt called ip22zilog_receive_chars and the later one crashed. Now, use objdump and create a disassembly dump of the object file that contains the IP22 Zilog stuff. There, find the part that's 0x20 bytes away from the start of ip22zilog_receive_chars. Now you know the cause of this oops. From here, try to figure out the reason for it... MfG, JBG --=20 Jan-Benedict Glaw jbglaw@lug-owl.de . +49-172-7608481 = _ O _ "Eine Freie Meinung in einem Freien Kopf | Gegen Zensur | Gegen Krieg = _ _ O fuer einen Freien Staat voll Freier B=FCrger" | im Internet! | im Irak! = O O O ret =3D do_actions((curr | FREE_SPEECH) & ~(NEW_COPYRIGHT_LAW | DRM | TCPA)= ); --j2AXaZ4YhVcLc+PQ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) iD8DBQFBhTx9Hb1edYOZ4bsRAkYSAJwLbPffuXF7PBQ1QBrB5HL7nEhWQACeOkyK kaZT7PBUY/flH9uuSsF8ZSs= =/RBU -----END PGP SIGNATURE----- --j2AXaZ4YhVcLc+PQ--