[Xen-devel] Coredumps and 'crash' utility...

["Roger Cruz" <rcruz@xxxxxxxxxxxxxxxxxxxxxxxx>]

I'm using XenSource 4.0 and have the need to debug the
XenSource-provided hypervisor's coredump file produce at /proc/vmcore.
I tried using Anderson's "crash" utility to read that file but I'm
getting the following error:

crash ./vmlinuz /dom0/proc/vmcore

crash 4.0-4.7
Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006  IBM Corporation
Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005, 2006  Fujitsu Limited
Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
Copyright (C) 2005  NEC Corporation
Copyright (C) 1999, 2002, 2007  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: /dom0/proc/vmcore: not a supported file format


I examined the core file and this is what it says its type is.

#file /dom0/proc/vmcore
/dom0/proc/vmcore: ELF 64-bit LSB core file AMD x86-64, version 1
(SYSV), SVR4-style


1) Has anyone been able to use 'crash' with XenSource's kernels?
2) What is the right vmcore file format for an open-source Xen?  Can
someone show me the output of 'file' on their vmcore so I can compare?

Thank you in advance!
Roger Cruz


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