Alexandra (Sasha) Fedorova wrote:
> Hello,
>
> When I used to debug Solaris on SPARC, I'd send a "break" signal Ctrl-] to
> the console, the system would drop into "ok" prompt and I'd start mdb like
> this: "mdb -k". However, on x86 platform the break signal does not drop you
> into the ok prompt, and I recall reading somewhere online that there isn't
> such a thing as "ok" prompt on x86 architectures.
>
> Could you please guide me in the right direction? How do I drop into the
> kernel debugger on x86 architectures?
>
There is no PROM debugger (ok prompt).
However: on both architectures, mdb -K on the system console will drop
into the kernel debugger (kmdb) for you, even if you forgot to boot via
kmdb.
Break on a serial console should also drop you to the debugger, but
*only* if you have the kernel debugger loaded (e.g. via mdb -K or the
appropriate boot command in the GRUB command line.)
There's also a keyboard sequence to do it for PS/2 keyboards -- I'm
pretty sure its CTRL-ALT-D (note that is "D" as in David, not
DELETE!) I've not tested to find out if it works for USB keyboards.
-- Garrett
> Thanks!
>
>
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