Date: Tue, 02 Apr 2013 23:06:06 +0200 From: mh@kernel32.de To: Konstantin Belousov <kostikbel@gmail.com> Cc: freebsd-current@freebsd.org Subject: Re: panic at serial boot Message-ID: <80b2deb3359ca04fb784334d60719860@kernel32.de> In-Reply-To: <20130402195223.GU3794@kib.kiev.ua> References: <e755813a47d9e5a05dd2d308a6b3d8a9@kernel32.de> <515289AC.3050204@FreeBSD.org> <936608f069b988fcd58707edb9b4dde0@kernel32.de> <20130327133220.GZ3794@kib.kiev.ua> <24096f01453ab9d0fe898522874cd928@kernel32.de> <941a3c1e7cb49087c8bf941399b1e5ae@kernel32.de> <20130402195223.GU3794@kib.kiev.ua>
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Hi again,
Am 2013-04-02 21:52, schrieb Konstantin Belousov:
> On Tue, Apr 02, 2013 at 08:23:20PM +0200, mh@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.
a little helpless regards,
./Marian
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