JTAG debugging

Stephen.Kimball at bench.com Stephen.Kimball at bench.com
Fri Oct 22 14:57:00 CEST 2004

I agree with Ron.  JTAG debuggers are more robust.  But I am interested
in stepping through LinuxBIOS on a working target to quickly understand
the code, so I'm able to attempt a port to a new target.  I view it as a
learning tool and a productivity tool.  If you could show people how to
use  a product like the American Arium, you might get more help.


-----Original Message-----
From: Ronald G. Minnich [mailto:rminnich at lanl.gov] 
Sent: Friday, October 22, 2004 3:06 PM
To: Eric W. Biederman
Cc: Kimball, Stephen; linuxbios at clustermatic.org
Subject: Re: Makefile changes for symbols

On Fri, 22 Oct 2004, Eric W. Biederman wrote:

> Alternatively it might be work adding gdb stubs into LinuxBIOS.  And
> using a remote debugger that way.  What a jtag interface provides
> is really not much more than what gdb stubs provides.  At least
> not after memory is initialized.

that's not quite correct. There are a host of cpu failures you can
with a jtag interface that gdb stubs are useless for. GDB stubs requires

that the processor be basically sane, jtag interfaces are not near as 


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