KGDB command line options not working for kernel 2.6.32

[Shaji Yusuf]

Sprio, thanks for the reply!
I root caused the issue by undoing my modifications and debugging again. The 
reason why kgdbwait did not kick in was that my point of debug was much before 
kgdb module loading. I think kgdb cannot be used for debugging my issue as i 
need to debug an issue much close to console init. Is there any way I can make 
kgdb load a little early?

As you said the space between kgdboc=ttyS0,  and 115200 also does matter. :)

Thanks
Shaji 

 


----- Original Message ----
From: Spiro Trikaliotis <ml-kernelnewbies at spiro.trikaliotis.net>
To: kernelnewbies at kernelnewbies.org
Sent: Fri, June 24, 2011 3:21:11 PM
Subject: Re: KGDB command line options not working for kernel 2.6.32

Hello,

* On Thu, Jun 23, 2011 at 10:39:44PM -0700 Shaji Yusuf wrote:

> Im using the following compile options for kernel 2.6.32
> CONFIG_KGDB = y
> CONFIG_KGDB_SERIAL_CONSOLE = y 

Same here. The only difference: It is not a vanilla 2.6.32, but a Debian
based 2.6.32-5-686 with only these things changed.

> While booting the kernel Im using the following command line options 
> 
> kgdboc=ttyS0, 115200 kgdbwait

Do you have the space between "," and "115200"? I use:

  kgdboc=ttyS0,115200 kgdbwait

It works as expected.


> I tried reordering the options with kgdbwait first, but both are not working.

I order for kgdbwait to work, it must be after kgdboc. That's what I
found out the hard way. ;)

> I 
> also tried kgdb8250 but no change. 

This one is wrong for 2.6.32.

> Any help would be highly appreciated. 

Other than the space above, I do not see a big difference between your
setup and mine. Perhaps, the space is the problem? 

Best regards
Spiro.

-- 
Spiro R. Trikaliotis                              http://opencbm.sf.net/
http://www.trikaliotis.net/                    http://www.viceteam.org/

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