Debugging the linux kernel core dump

[Akash]

Hello,

I have a core dump from following machine :
<http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies>
# uname -a
Linux sing-vto2-dst 2.6.34.8-0.2-desktop #1 SMP PREEMPT 2011-04-06 18:11:26
+0200 x86_64 x86_64 x86_64 GNU/Linux

I have opened this core in gdb

# gdb vmlinux-2.6.34.8-0.2-desktop kernel.core0
GNU gdb 6.6 (build 2009-10-05)
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(no debugging symbols found)
Program terminated with signal 11, Segmentation fault.
#0  0xffffffff8100ba60 in default_idle ()


How can I add symbols to gdb ?
When I try to add symbols from System.map I get following error :

(gdb) add-symbol-file System.map-2.6.34.8-0.2-desktop
The address where System.map-2.6.34.8-0.2-desktop has been loaded is missing


At what address should the System.map be added ? How can I find out that
address ?

Thanks for any help.

Akash
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