On Wed, Feb 24, 2010 at 12:21 PM, Dave Anderson < anderson(a)redhat.com > wrote: That's right. That is the stack value that will be restored upon return to user-space, and the EIP will be restored to 00f14402. One thing to make sure of is that when you do the "rd -u", you have set the crash utility to the context of the task whose "bt" output you're showing. "rd -u" will read the user space of the current task (i.e., the task shown if you do a "set" command). Could that be adapted into a way to produce a userspace core dump that we could feed to regular old gdb?