Hi all,

I am a newbie with Xen. I was working on Xen and hit an assertion. I was trying to dump the hypervisor image from the /proc/vmcore file I obtained after kdump rebooted. However, I had trouble getting the python script dom0cut.py to work.

I followed the instruction on Xen wiki to install the latest libelf.0.8.9 from [1] and the libelf wrapper from [2]. I also had to create a softlink /usr/lib/libelf.so.1 to get the script to run. Here is the command I used: "dom0cut.py -o xenImage -d ~/dumpcore1 --target=x -x ~/stuff/xen/xen-3.1-testing.hg/xen/xen-syms -telf". However, the script seemed to require eu-readelf to work. Therefore, I had to install elfutils (0.123-3). Then, I get the following errors:

Traceback (most recent call la! st): File "/usr/bin/dom0cut.py", line 8, in ? import xendump.XenCore File "/usr/lib/python2.4/site-packages/xendump/XenCore.py", line 7, in ? import xendump.CoreDump as CoreDump File "/usr/lib/python2.4/site-packages/xendump/CoreDump.py", line 1, in ? import xendump.Arch as Arch File "/usr/lib/python2.4/site-packages/xendump/Arch.py", line 1, in ? import libelf File "/usr/lib/python2.4/site-packages/libelf/__init__.py", line 10, in ? from libelf import * File "/usr/lib/python2.4/site-packages/libelf/libelf.py", line 5, in ? import _libelf ImportError: /usr/lib/python2.4/site-packages/libelf/_libelf.so: undefined symbol: elfx_remscn

Apparently, elfutils installed another libelf and overwrote the symlink I created. So, I made the symlink point back to the original ! libelf that I installed but then I get a different error message: < br>eu-readelf: /usr/lib/libelf.so.1: no version information available (required by eu-readelf) eu-readelf: /usr/lib/libelf.so.1: no version information available (required by eu-readelf) eu-readelf: /usr/lib/libelf.so.1: no version information available (required by eu-readelf) eu-readelf: cannot generate Elf descriptor: Request error: invalid ELF_C_* argument

Traceback (most recent call last): File "/usr/bin/dom0cut.py", line 179, in ? main() File "/usr/bin/dom0cut.py", line 137, in main dump = xendump.ElfCore.ElfCoreReader(options.dumpname, options.arch) File "/usr/lib/python2.4/site-packages/xendump/ElfCore.py", line 214, in __init__ raise ValueError, 'section isn\'t found' ValueError: section isn't found

It looks to me that there are 2 different releases of libelf out there: [1] and the one with elfutils [3] (and maintained by Redhat !?).

Any clues on how to deal with this issues ? Does re-compiling eu-readelf from source work ? Thanks.

[1]: http://www.mr511.de/software/ [2]: http://people.valinux.co.jp/~moriwaka/dumpread/ [3]: http://packages.debian.org/unstable/libs/libelf1

Regards,

Levin

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