On 2008-11-23, at 18:36 , Barbara wrote:
About kgdb...
I never used freebsd-update, so sorry if I'm saying
something
stupid, but could it be the case that the kernel has been
built
without debugging symbols or something like that? Does freebsd-
update provide a kernel.debug?
I haven't had to use a the kernel.debug file
in the obj dir in a long
time. As far as I know, these days, the GENERIC
kernel includes debug
symbols. And in cases when there aren't any debug
symbols, that
shouldn't prevent kgdb from loading, I wouldn't think.
Hello,
I had a k panic some hours ago but I think that's related to a
problem with one
of my HDs.
I've got a dump in /var/crash, and as you were interested, I run:
# kgdb /boot/kernel/kernel /var/crash/vmcore.6
GNU gdb 6.1.1
[FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free
software, covered by the GNU General Public License, and you are
welcome
to change it and/or distribute copies of it under certain conditions.
Type
"show copying" to see the conditions.
There is absolutely no warranty for
GDB. Type "show warranty" for details.
This GDB was configured as "i386-
marcel-freebsd"...(no debugging symbols found)...
Attempt to extract a
component of a value that is not a structure pointer.
Attempt to extract a
component of a value that is not a structure pointer.
Attempt to extract a
component of a value that is not a structure pointer.
Attempt to extract a
component of a value that is not a structure pointer.
Terminated
I had
to pkill kgdb as it was in a loop.
Running it against kernel.debug in
/usr/obj/usr/src/sys/$KERNCONF/ worked as expected.
I've always followed this
way, so I don't know if it was working with earlier releases.
Ah, well you must not be using GENERIC then, because it does have the
debugging symbols.
I think this is the setting in the GENERIC config that controls it:
makeoptions DEBUG=-g
But I guess what you're doing works if you're using a custom kernel
that does not have that config setting.
- rory
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