Re: [Crash-utility] crash can not read ia64 lkcd v9 dump
Hello,
* Dave Anderson <anderson(a)redhat.com> [2006-11-08 22:26]:
Olaf Hering wrote:
> On Wed, Nov 08, Dave Anderson wrote:
> > Olaf Hering wrote:
> >
> > > crash 4.0-3.9 can not read a dump file from an ia64 box running 2.6.5.
> > > Is this supposed to work?
> > >
> > > crash -s boot/System.map-2.6.5-7.267-sn2 boot/Kerntypes-2.6.5-7.267-sn2
dump.3
> >
> > Well, if it did work, it would be news to me. I've certainly never run
crash
> > with a "Kerntypes" file as a substitute for a -g built vmlinux file.
>
> Thats all we have right now. And sadly, I have been told that gcc will
> generate different asm depending on what host the kernel is compiled
> (memory config etc.). So getting the exact vmlinux again may be a
> challenge with gcc3.2.
Well, that's always been the case, and that's OK. In that case,
all you have to do is compile the identical kernel source code
with -g, but also pass the System.map file of the "real" dumped
vmlinux on the command line, as in:
# crash vmlinux-rebuilt-with-g System.map-of-dumped-vmlinux dumpfile
That's the sole purpose of the System.map argument, which should
*only* be used in such a case.
I get this output here:
# crash ./vmlinux-2.6.5-7.282-debug map.4 dump.4
crash 4.0-53.1
Copyright (C) 2002, 2003, 2004, 2005, 2006 Red Hat, Inc.
Copyright (C) 2004, 2005, 2006 IBM Corporation
Copyright (C) 1999-2006 Hewlett-Packard Co
Copyright (C) 2005 Fujitsu Limited
Copyright (C) 2005 NEC Corporation
Copyright (C) 1999, 2002 Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
This program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. Enter "help copying" to see the conditions.
This program has absolutely no warranty. Enter "help warranty" for
details.
crash: map.4: not a supported file format
Usage:
crash [-h [opt]][-v][-s][-i file][-d num] [-S] [mapfile] [namelist] [dumpfile]
Enter "crash -h" for details.
./vmlinux-2.6.5-7.282-debug is a uncompressed kernel image without
debug information (IA 64), map.4 is a normal System.map file and
dump.4 is the LKCD dump file.
Without the map.4 argument, crash doesn't complain about the file
formats.
Any hints? Thanks!
Regards,
Bernhard
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