[U-Boot-Users] GDB support for ARM

[U-Boot-Users] GDB support for ARM

[Dirk Behme]

Hello,

using U-Boot at an ARM9 board, at the moment I download a image by tftp 
into board's SDRAM and then start the image by 'g 0x1000000' (0x10000000 
is the SDRAM base address).

Now, I wonder if it is possible to start the image under control of gdb. 
  As I understand it, there can run a small 'gdb-stub' on the target 
which talks by serial line or by ethernet with the gdb on the 
development host.

In common/kgdb.c there seems to be something like this small 'gdb-stub'? 
Does it work for ARM? How can it be used?

Thanks in advance and sorry if this is a FAQ.

Regards

Dirk

[U-Boot-Users] GDB support for ARM

[Robert Schwebel]

On Tue, Jun 01, 2004 at 09:23:04AM +0200, Dirk Behme wrote:
> using U-Boot at an ARM9 board, at the moment I download a image by tftp 
> into board's SDRAM and then start the image by 'g 0x1000000' (0x10000000 
> is the SDRAM base address).
> 
> Now, I wonder if it is possible to start the image under control of gdb. 
>  As I understand it, there can run a small 'gdb-stub' on the target 
> which talks by serial line or by ethernet with the gdb on the 
> development host.
> 
> In common/kgdb.c there seems to be something like this small 'gdb-stub'? 
> Does it work for ARM? How can it be used?

The code you are quoting suggests that it is for ppc. I personally would
not wast the time to try to make the serial kgdb stuff working - the
BDI2000 works fine with ARM9 cpus and you can use gdb with it as well. 

Robert
-- 
 Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de
 Pengutronix - Linux Solutions for Science and Industry
   Handelsregister:  Amtsgericht Hildesheim, HRA 2686
     Hornemannstra?e 12,  31137 Hildesheim, Germany
    Phone: +49-5121-28619-0 |  Fax: +49-5121-28619-4

[U-Boot-Users] GDB support for ARM

[Woodruff, Richard]

Hi Dirk,

I looked into this a while back.  The code necessary to make this work
for ARM is not present.  I added about 1/2 of the code (perhaps more
than half) necessary to get it to work on the OMAP1510 and can send it
if you like.  The missing bit has to do with handing exceptions
properly.

I added in a serial debug server which is used along with a
manufacturer's wireless tests.  I attempted to input this code in a
somewhat parallel way to what GDB needed, in hopes that I could also
make the GDB stuff work.

Given how useful JTAG is and schedules I didn't end up working though
the exception code.  It broken in several spots, some in its current use
of R8, some in its stacking for SWI mode, and in general its recovery
needs work.

Regards,

Richard W.

> -----Original Message-----
> From: u-boot-users-admin at lists.sourceforge.net [mailto:u-boot-users-
> admin at lists.sourceforge.net] On Behalf Of Dirk Behme
> Sent: Tuesday, June 01, 2004 2:23 AM
> To: u-boot-users at lists.sourceforge.net
> Subject: [U-Boot-Users] GDB support for ARM
> 
> Hello,
> 
> using U-Boot at an ARM9 board, at the moment I download a image by
tftp
> into board's SDRAM and then start the image by 'g 0x1000000'
(0x10000000
> is the SDRAM base address).
> 
> Now, I wonder if it is possible to start the image under control of
gdb.
>   As I understand it, there can run a small 'gdb-stub' on the target
> which talks by serial line or by ethernet with the gdb on the
> development host.
> 
> In common/kgdb.c there seems to be something like this small
'gdb-stub'?
> Does it work for ARM? How can it be used?
> 
> Thanks in advance and sorry if this is a FAQ.
> 
> Regards
> 
> Dirk
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by: Oracle 10g
> Get certified on the hottest thing ever to hit the market... Oracle
10g.
> Take an Oracle 10g class now, and we'll give you the exam FREE.
> http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click
> _______________________________________________
> U-Boot-Users mailing list
> U-Boot-Users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/u-boot-users