Re: panic at serial boot

From: Oliver Pinter <oliver.pntr_at_gmail.com>
Date: Wed, 3 Apr 2013 00:25:28 +0200
On 4/2/13, mh_at_kernel32.de <mh_at_kernel32.de> wrote:
> Hi again,
>
> Am 2013-04-02 21:52, schrieb Konstantin Belousov:
>> On Tue, Apr 02, 2013 at 08:23:20PM +0200, mh_at_kernel32.de wrote:
>>
>> Try breaking into the debugger and see where it progresses. To do
>> this,
>> you would need to boot with the 'boot -d' command from the loader
>> prompt,
>> then do 'w kbd_break_to_debugger 1', then ctrl-alt-esc when you want
>> to
>> activate the debugger. In the debugger, start with the 'ps' command.
>>
>
> After the beastie menu I went to the loader prompt and did "boot -d".
> I was sent to the debugger and did "w kbd_break_to_debugger 1".
>
> This is the output I get.
>
> INT 13 08: Success, count = 1, BPT = 0000:0000
>         GDB: no debug ports present
> KDB: debugger backends: ddbhift limit: 0x82
> KDB: current backend: ddbt15 = f000f859  int1e = f000ef6d
> KDB: enter: Boot flags requested debuggerint1e = f000ef6d
> [ thread pid 0 tid 0 ] booting...
> Stopped at      kdb_enter+0x3e: movq    $0,kdb_why
> db> w kbd_break_to_debugger 1
> Symbol not found
>
>
> Where to go from now? A good pointer to documentation is okay too ;)
> Sorry if asking too many questions, but although being a FreeBSD user
> since 4.0, I never had to debug or been to where I am now.
> So in advance another sorry if the question sounds stupid.
>
> A quick google for 'FreeBSD "w kbd_break_to_debugger 1" "Symbol not
> found"' didn't return anything.

change the order from console="comconsole,vidconsole" to
console="comconsole,vidconsole" in /boot/loader.conf, i think that
fixed the problem

>
> a little helpless regards,
> ./Marian
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Received on Tue Apr 02 2013 - 20:25:34 UTC

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