From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailserv2.iuinc.com (qmailr@mailserv2.iuinc.com [206.245.164.55]) by puffin.external.hp.com (8.8.7/8.8.7) with SMTP id QAA04954 for ; Thu, 16 Sep 1999 16:30:26 -0600 Date: Fri, 17 Sep 1999 00:32:09 +0200 From: Philipp Rumpf To: Grant Grundler Cc: parisc-linux@thepuffingroup.com Subject: Re: [parisc-linux] 715/100 data page fault and msg output Message-ID: <19990917003209.H8112@suse.de> References: <199909162158.OAA21289@milano.cup.hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <199909162158.OAA21289@milano.cup.hp.com>; from Grant Grundler on Thu, Sep 16, 1999 at 02:58:14PM -0700 List-ID: > bad address 00000004 > > PSW : 0004000b GR 1 : 00000000 GR 2 : 00014de8 GR 3 : c0079000 > GR 4 : c0079000 GR 5 : c010dd48 GR 6 : c00fe000 GR 7 : c0105800 > GR 8 : 00002000 GR 9 : 00000008 GR10 : c0015e84 GR11 : fc3ffe1f > GR12 : 00000000 GR13 : 00000001 GR14 : 0000000a GR15 : f0000704 > GR16 : f000b858 GR17 : 00000002 GR18 : 00000000 GR19 : c00eb92c > GR20 : 0001aa03 GR21 : f0105800 GR22 : 00000000 GR23 : 00000060 > GR24 : f0105800 GR25 : 00000001 GR26 : c00ddc8c GR27 : c0071000 > GR28 : 00000000 GR29 : 00000000 GR30 : 00000000 GR31 : c0017840 > SR0 : 00000000 SR1 : 00000000 SR2 : 00000000 SR3 : 00000000 > SR4 : 00000000 SR5 : 00000000 SR6 : 00000000 SR7 : 00000000 > IAOQ : c0067c4c c0067c50 > SHR 1: 50000800 SHR 8: 00000008 SHR 9: c00d7000 SHR16: c0076874 > SHR17: 00000002 SHR24: f0105800 SHR25: 00000001 > Kernel panic: bad address > > In swapper task - not syncing > ================================================ This is a NULL pointer, and most probably a bug in the CVS tree that is already fixed in my tree. I will send a diff between the trees to the list later. > Couple of things in the trap handler would help here: > o More white space - makes what to cut/paste easier to determine > o clear text describing the fault > o In this case the offending instruction and a stack trace. > o printing the invalid address, IOAQ and general registers was good basically look at what the x86 port does and implement it. > On a different note, the kernel prints lots of useful stuff along > with plenty of garbage. As a general rule, I would like to propose > folks use file name and line number instead of "here" and "Heya". > Remember we will be debugging stuff via other folks console output > quite a bit. Remember most of the messages will disappear soon (many of them as soon as Alex finishes moving the tree to 2.2.12). I do not intend to waste my time changing anything outside of arch/parisc and include/asm-parisc because that will mostly be replaced by the linus versions. > ps. Alex showed me the "la la la" work around in init_task.c. > Is anyone already working to make this a runtime check? you cannot. not without major pain at least Philipp Rumpf