kdb for xen

[Mukesh Rathor <mukesh.rathor@oracle.com>]

Hi xen folks,

   It is my pleasure to announce an internal debugger for the xen hypervisor 
(64bit). It's a full fledged debugger that will "halt" the system, so the 
entire state can be examined. Some examples of commands:

xkdb> cpu all    : see one line state of all cpus
xkdb> cpu 7      : switch to cpu 7 (the leaving cpu will pause immed)
xkdb> dd addr 32 : display 32 bytes at address in doublewords
xkdb> dr sp      : display registers including special registers
xkdb> ni         : single step (go over function calls)
xkdb> dom 5      : display dom 5 details
xkdb> vcpu <ptr> : display vcpu details at give "ptr"

Type "h" at the prompt for all commands and usages.

It can be downloaded from:

http://xenbits.xensource.com/ext/kdb.hg

and built by running "make kdb=y" in xen-unstable.hg/xen


FEATURES:
   - set breakpoints in hypervisor
   - examine/modify memory, registers, special registers, domains, vcpus, etc..
   - single step, single step till jump/call, step over call to next
     instruction after the call.
   - examine/modify memory of a PV guest.
   - set breakpoints, single step, etc... for a PV guest.
   - above functionality for HVM guest if the debugger breaks into a running
     HVM guest.
   - breaking into the debugger will freeze the system, all CPUs will pause,
     no interrupts are acknowledged in the debugger. (Hence, the wall clock
     will drift)
   - single step will step only that cpu.

Regards,
Mukesh Rathor