kgdb usage errors on strictly following kgdb authorss guide

[Lev Olshvang]

Hello all,

I am looking for explanation of the  kgdb errors and usage advice.

I am running Linux 2.6.15.5 system with a kgdb patches from the 
kgfb.linsyssoft.com.

I built a kernel with ethernet driver included (not module) and KGDB 
remote debug enable over Ethernet.

I am trying to strictly follow the guide I had downloaded from 
linsyssoft.com


First I tried to run debug other ethernet using kgdboe parameter on boot

I built a kernel with ethernet driver included (not module) and KGDB 
remote debug enable over Ethernet.

And the gdb session was stuck because the target system did not answered 
to ARP requsests
for 10.0.0.3
The corresponding section from gub.conf is

title Linux-2.6.15.5-kgdb(eth)
root (hd0,0)
kernel /boot/vmlinuz-2.6.15.5-kgdb ro root=/dev/hda1 
kgdboe=@10.0.0.6/, at 10.0.0.3/
console=ttyS0,115200


So I suppose I should manually load network driver, but how can I do it 
from boot line and assign IP address to it ?
-------------------------------------------------------------------------------------------------------------------

The second attempt I took with a serial 8250 driver
I had build new kernel with Serial driver configured  for remote 
debugging and

changed boot line to :

kernel /boot/vmlinuz-2.6.13-kgdb ro root=/dev/hda1 kgdbwait 
kgdb8250=1,115200

*Question1 :  - docs says it must be kgdb8250=ttyS1,115200,
*
but when I tried this , the debug session even did not come to kgdb 
breakpoint.


gdbmod-2.4 ./vmlinux itle Linux-2.6.15.5-kgdb(eth)


GNU gdb 6.4
Copyright 2005 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 "i686-pc-linux-gnu"...Using host libthread_db 
library "/lib/libthread_db.so.1".

(gdb) set remotebaud 115200
(gdb) target remote /dev/ttyS0
Remote debugging using /dev/ttyS0
breakpoint () at kernel/kgdb.c:1888
1888            atomic_set(&kgdb_setting_breakpoint, 0);
(gdb) cont
Continuing.
[17179569.184000] Waiting for connection from remote gdb...
[*17179569.184000] Invalid syntax for option kgdb8250=*

[New thread 1737]
Error while mapping shared library sections:
ide_disk.ko: Success.
Error while reading shared library symbols:
ide_disk.ko: No such file or directory.
Error while reading shared library symbols:
ide_disk.ko: No such file or directory.
[New thread 1774]
Error while reading shared library symbols:
ide_disk.ko: No such file or directory.
Error while reading shared library symbols:
ide_disk.ko: No such file or directory.
[New thread 1747]
Error while mapping shared library sections:
generic.ko: Success.
Error while reading shared library symbols:
ide_disk.ko: No such file or directory.
Error while reading shared library symbols:
generic.ko: No such file or directory.
Error while reading shared library symbols:
ide_disk.ko: No such file or directory.
Error while reading shared library symbols:
generic.ko: No such file or directory.
[New thread 1757]
Error while mapping shared library sections

Question 3 : Are those Succeses and Errors normal
Question  4: How I can command to load my module from gdb line and set a 
breakpoint to the function I would like to debug ?



Regards to the kenel gurus.

Lev