escape to kernel debugger
Greg 'groggy' Lehey
grog at FreeBSD.org
Thu Dec 25 23:51:04 PST 2003
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On Friday, 26 December 2003 at 9:35:05 +0200, Danny Braniss wrote:
>> On Friday, 26 December 2003 at 9:13:57 +0200, Danny Braniss wrote:
>>> hi,
>>> how can i break into the kernel debugger when the console
>>> is a serial one? (Ctrl-Alt-Esc has now ascii equivalent :-)
>>
>> Try:
>>
>> sysctl debug.enter_debugger=gdb
>>
>> to go into gdb, or
>>
>> sysctl debug.enter_debugger=ddb
>>
>> to go into ddb.
>
> wups, sorry, forgot to mention,
>
> the machine is hung
In that case, you could have trouble either way. There are
possibilities with firewire, but you've probably lost. If you can't
get local access, I think it's time for the Big Red Button.
Greg
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