Coldfire/RTEMS Debugging

[Victor V. Vengerov]

Steve,

As fine as I know, other options are available, but they are essentially 
more expensive. For example, you may consider Abatron BDI2000 box, 
http://www.abatron.ch. Abatron has an option when gdb debugging protocol 
supported over ethernet, and they support Coldfire processors. I guess, 
gdb "from the box" can communicate with this debugger (but I have not 
tried this, it's just a theory).

Victor

Steve Strobel wrote:

> I have been using m68k-bdm-elf-gdb with a P&E parallel port BDM 
> interface to debug Coldfire targets running RTEMS for the past few 
> years.  My new computer didn't have a parallel port and the PCI card I 
> got to add one doesn't support the standard I/O address for LPT ports, 
> so I am in need of a modified debugger.  I believe that last time I 
> built GDB that I used the GDB source from the sourceforge BDM Tools 
> project, without any RTEMS patches.  Is that the best thing to do now, 
> or would there be benefits in also applying the RTEMS patches?
>
> Is remote debugging (either via serial or ethernet) possible on the 
> Coldfire?  In Oct 2004, Chris Johns wrote, "I do not know of a stub 
> for remote ethernet debugging if BDM is not connected" 
> (<http://www.rtems.com/ml/rtems-users/2004/october/msg00338.html>). 
> Later in that thread, RTEMS librdbg, <
> http://sourceforge.net/projects/gdbstubs/
> > and <
> http://www.kegel.com/linux/gdbserver.html
> > were all mentioned, but I never saw anyone say that any of them were 
> working for the Coldfire.
> What about RTEMS awareness?  
> <http://www.rtems.org/wiki/index.php/DebuggingHints> says, "Currently 
> GDB is not RTEMS aware. GDB scripts exist that can help..." but the 
> RTEMS/GDB User's Guide at 
> <http://www.rtems.org/onlinedocs/doc-current/share/rtems/pdf/rtems_gdb.pdf> 
> talks about thread control.  Is that just using the scripts?  If so, I 
> presume that they will work with the stock GDB.
>
> How do people use the pre-compiled m68k binaries from the RTEMS site 
> (such as 
> <ftp://ftp.rtems.com/pub/rtems/cygwin/rtems-4.6/rtems-4.6-gdb-5.2-1/rtems-4.6-m68k-rtems-gdb-5.2-1.tar.bz2> 
> if they don't support BDM or remote debugging?  I must be missing 
> something obvious.  Thanks for any help or suggestions.
>
> Steve
>
>
>
> ---
> Steve Strobel
> Link Communications, Inc.
> 1035 Cerise Rd
> Billings, MT 59101-7378
> (406) 245-5002 ext 102
> (406) 245-4889 (fax)
> WWW: http://www.link-comm.com
> MailTo:steve.strobel at link-comm.com
>


-- 
Victor Vengerov
OKTET Labs, St.-Petersburg, Russia  http://www.oktetlabs.ru
Phone: +78124286709 (office) +78129389372 (mobile) +78124281653 (home)