remote debugging?

[Charles Lepple]

Andreas Tobler wrote:
[...]
> The kernel is compiled with xmon included, the one I test boots and is a
> 2214pre18. It's only to find out how 'remote' works.

Once you have a kernel with xmon support, you can generate an NMI
(command-power, I believe) and that drops you into xmon (assuming the
machine is not too far gone). In addition, xmon will come up when a
fatal exception occurs, or when you put a xmon(0) call into a function
in the kernel.

When debugging an embedded system, I just put a bunch of xmon(0) calls
at strategic locations, and when I got close to where the system was
hanging, I poked around with xmon.

Paul Mackerras wrote some documentation for xmon that you may want to
check out. It doesn't seem to be in Documentation/ but it's probably at
linuxppc.cs.nmt.edu or something (search the mail archives -- it has
been discussed before).

-- 
Charles Lepple
clepple at mitre.org


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