Date: Sat, 15 Nov 2014 10:15:23 -0800 From: John-Mark Gurney <jmg@funkthat.com> To: Julian Elischer <julian@freebsd.org> Cc: freebsd-virtualization@freebsd.org Subject: Re: bhyve remote kgdb does not support kernel modules... Message-ID: <20141115181523.GA24601@funkthat.com> In-Reply-To: <54677DFC.70708@freebsd.org> References: <20141115093713.GY24601@funkthat.com> <20141115094340.GZ24601@funkthat.com> <54677DFC.70708@freebsd.org>
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Julian Elischer wrote this message on Sun, Nov 16, 2014 at 00:23 +0800:
> On 11/15/14, 5:43 PM, John-Mark Gurney wrote:
> >John-Mark Gurney wrote this message on Sat, Nov 15, 2014 at 01:37 -0800:
> >>So, I got remote kgdb working w/ bhyve, but kernel modules aren't
> >>loaded...
> >>
> >>I'm getting:
> >>(kgdb) bt
> >>#0 kdb_enter (why=0xffffffff8102ee88 "panic", msg=<value optimized out>)
> >> at ../../../kern/subr_kdb.c:444
> >>#1 0xffffffff8094aa79 in vpanic (fmt=<value optimized out>,
> >> ap=<value optimized out>) at ../../../kern/kern_shutdown.c:739
> >>#2 0xffffffff8094a8c9 in kassert_panic (fmt=<value optimized out>)
> >> at ../../../kern/kern_shutdown.c:634
> >>#3 0xffffffff8093583c in __mtx_lock_flags (c=0xfffff80002919720, opts=0,
> >> file=0xffffffff81c3f0fa
> >> "/usr/home/jmg/freebsd.p4/opencrypto/sys/modules/aesni/../../crypto/aesni/aesni.c", line=442) at ../../../kern/kern_mutex.c:217
> >>#4 0xffffffff81c3e3a7 in ?? ()
> >>#5 0xfffff80002a474a0 in ?? ()
> >>#6 0xfffff80002919720 in ?? ()
> >>
> >>Where those should be in the aesni.ko module... If I run kgdb on a
> >>local machine, it properly finds the kernel modules... Any hits on
> >>how to fix this?
>
> works for me..
> the modules I'm debugging are not compiled in.
> you have to have the modules in the standard place ONE THE GDB HOST.
> I make a chroot with an image of the machine being debugged, PLUS the
> sources.
> and then run kgdb from inside that chroot.
Ahh, that's right, kgdb isn't smart enough to know when you've pointed
it to the kernel build dir whereh the modules are... :(
Thanks for the reminder...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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