Re: kgdb over ethernet support for 3.x kernel

On Tue, Jul 3, 2012 at 11:26 AM, Amit Nagal <helloin.amit@xxxxxxxxx> wrote:

On Tue, Jul 3, 2012 at 11:15 AM, Sannu K <sannumail4foss@xxxxxxxxx> wrote:
>
>
> On Tue, Jul 3, 2012 at 11:09 AM, Peter Teoh <htmldeveloper@xxxxxxxxx> wrote:
>>
>> have not heard of such feature available, but technically, the reason why
>> serial port is important is because it is initialized at a very early stage
>> in linux kernel bootup, and anything that happened before that cannot be
>> analyzed via kgdb as well. i am not sure why u need ethernet. normally
>> my approach is to use VirtualBox running a kernel with kgdb parameters all
>> setup, and then define a virtual serial port in VirtualBox, to connect to a
>> pipe, and then from host OS, use gdb to attach via "target remote" to the
>> virtual terminal, which is created via the "socat" command.
>>
>> Search the web for details.
>>
>> http://www.google.com.sg/search?q=socat+virtualbox+serial+kgdb
>>
>>
>>>

>>> _______________________________________________
>>> Kernelnewbies mailing list
>>> Kernelnewbies@xxxxxxxxxxxxxxxxx
>>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>>
>>
>>
>> --
>> Regards,
>> Peter Teoh
>>
>> _______________________________________________
>> Kernelnewbies mailing list
>> Kernelnewbies@xxxxxxxxxxxxxxxxx
>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>
> Hi Amit,
>
> KGDB over ethernet is not merged to linux kernel. It is available as a
> separate patch. Ethernet is very fast compared to serial communication.
> While trying to debug a driver it may not be possible to use virtualbox.
>
> Thanks,
> Sannu

Thanx for all useful insights .

The reason i want to use ethernet is that on my embedded target serial
port is already used for message
logging purpose . so cannot use serial port for debugging .

basically i want to put breakpoints at runtime and debug modules .
please suggest me alternative
debug mechanism too especially useful for debugging modules on
embedded targets .

can i know the exact repository from where i can download kgdboe patch
which i can apply for 2.6.35 kernel onwards or 3.x series kernels .

Regards
Amit Nagal