RE: [microblaze-uclinux] kernel debuggers

["Jeff Fellin" <jeff.fellin@xxxxxxxxxxxxxxxxxxx>]

-----Original Message-----
From: owner-microblaze-uclinux@xxxxxxxxxxxxxx
[mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxx] On Behalf Of John Williams
Sent: Tuesday, March 20, 2007 1:11 AM
To: microblaze-uclinux@xxxxxxxxxxxxxx
Subject: Re: [microblaze-uclinux] kernel debuggers

Hello Jeff,

Jeff Fellin wrote:
> I am having problems where my system intermittently has a timeout and
> reboots. In previous places I have built the kernel with either kgdb or
xmon
> 
> to be entered on system failure to diagnose the problem. From the FAQ I
see
> starting the system with gdb for remote debugging. I was wondering if
anyone
> has incorporated either kgdb or xmon into the microblaze kernel?

I am not aware of anyone doing kgdb support for MicroBlaze, and 
certainly within the kernel version in PetaLinux and the uClinux CVS 
tree, there is no support for it.

HW debugging the kernel via JTAG, using the opb_mdm core and XMD on the 
host with GDB, works well in most cases.  Is there a specific reason you 
cannot, or don't want to use this?

John, The main reason is familiarity with xmon debugging from previous
embedded PowerPC Linux work. I liked the fact that when a system paniced the
debugger was there and didn't have to always start the system via the
debugger. But there is always time to learn new things

Regards,

John


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