KDB in ameslab

[Anton Blanchard]

> I don't have the urge to update it but I'm motivated (today) to fix it
> up enough to work.  Do you want a patch on the mailing list, or just
> a bk push?

Im OK with a push, it probably just requires fixes to the code that
initialises the debugger hooks.

The xmon stuff now can be enabled/disabled at runtime (at this stage you
have to use sysrq to do it), it would be nice if kdb did too. That would
mean we could have both debuggers compiled in and we can enable either
at runtime.

With a bit of effort xmon could become a module too.

Anton

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