target remote and UDP source port (needed for kgdb debugging)

target remote and UDP source port (needed for kgdb debugging)

[sfora dim]

Hi all,

When I "target remote udp:192.168.1.1:6433" I do not control
my source UDP port, and it is picken randomly, usually above
the 30K.

Is there a way to ask gdb to use a specific UDP port when debugging
a remote target ?

This is important to me because when using kgdb as a target,
I need to let it know what source port the gdb packets will come from.

Thank you,
sfora

Re: target remote and UDP source port (needed for kgdb debugging)

[Daniel Jacobowitz]

On Wed, Dec 19, 2007 at 02:40:28PM +0200, sfora dim wrote:
> Hi all,
> 
> When I "target remote udp:192.168.1.1:6433" I do not control
> my source UDP port, and it is picken randomly, usually above
> the 30K.
> 
> Is there a way to ask gdb to use a specific UDP port when debugging
> a remote target ?

No, there is not.

-- 
Daniel Jacobowitz
CodeSourcery

Re: target remote and UDP source port (needed for kgdb debugging)

[sfora dim]

On 12/19/07, Daniel Jacobowitz <drow@false.org> wrote:
> On Wed, Dec 19, 2007 at 02:40:28PM +0200, sfora dim wrote:
> > Is there a way to ask gdb to use a specific UDP port when debugging
> > a remote target ?
>
> No, there is not.

So how do people work with this ?

I use tcpdump every time I begin a debugging session, and once I see
the source port, I reconfigure my kgdb.

Is there a better way (this is rather awkward) ?

thank you
sfora


>
> --
> Daniel Jacobowitz
> CodeSourcery
>

Re: target remote and UDP source port (needed for kgdb debugging)

[Andreas Schwab]

"sfora dim" <sfora.dim@gmail.com> writes:

> Is there a better way (this is rather awkward) ?

netstat?

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Re: target remote and UDP source port (needed for kgdb debugging)

[Paul Koning]

>>>>> "sfora" == sfora dim <sfora.dim@gmail.com> writes:

 sfora> On 12/19/07, Daniel Jacobowitz <drow@false.org> wrote:
 >> On Wed, Dec 19, 2007 at 02:40:28PM +0200, sfora dim wrote: > Is
 >> there a way to ask gdb to use a specific UDP port when debugging >
 >> a remote target ?
 >> 
 >> No, there is not.

 sfora> So how do people work with this ?

 sfora> I use tcpdump every time I begin a debugging session, and once
 sfora> I see the source port, I reconfigure my kgdb.

 sfora> Is there a better way (this is rather awkward) ?

Fix the stub so it doesn't require a hardcoded source port?  It's
pretty weird to expect the originator of traffic to have a fixed port
number. 

	paul