On Tue, Jul 3, 2012 at 11:26 AM, Amit Nagal [off-list ref] wrote:

On Tue, Jul 3, 2012 at 11:15 AM, Sannu K [off-list ref] wrote:

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On Tue, Jul 3, 2012 at 11:09 AM, Peter Teoh [off-list ref]

wrote:

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have not heard of such feature available, but technically, the reason

why

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serial port is important is because it is initialized at a very early

stage

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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

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my approach is to use VirtualBox running a kernel with kgdb parameters

all

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setup, and then define a virtual serial port in VirtualBox, to connect

to a

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pipe, and then from host OS, use gdb to attach via "target remote" to

the

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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

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Regards,
Peter Teoh

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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

Why not try JTAG? I am not sure of how to use it or whether it is available
in your hardware but just suggested if that option is missed.

Thanks,
Sannu
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