[Crash-utility] how to generate xen hypervisor core though kdump or other way?

Hi guys: My server is Suse Linux SLES11 sp2 verison , HjCloud:~ # uname -a Linux HjCloud 3.0.38-0.5-xen #1 SMP Fri Aug 3 09:02:17 UTC 2012 (358029e) x86_64 x86_64 x86_64 GNU/Linux I know to get dom0 kdump core by "echo c >/proc/sysrq-trigger ", but don't know how to get xen hypervisor core , then how to analysis the hypervisor core by Crash software. Can you help me?