[U-Boot-Users] u-boot debugging using gdb and BDI2000

[Demke, Torsten]

> -----Original Message-----
> From: Wolfgang Denk [mailto:wd at denx.de]
> Sent: Dienstag, 1. Juli 2003 20:02
> To: Demke, Torsten
> Cc: U-Boot Mailing List (E-mail)
> Subject: Re: [U-Boot-Users] u-boot debugging using gdb and BDI2000 
> 
> 
> In message 
> <9CFB9DA5261CD611A29B00508B78904804E5945A at ex-deu-munich02.forc
> e.de> you wrote:
> > 
> > we recently purchased a BDI2000 to debug some of our products.
> > I have u-boot-0.4.0 running on our board with a MPC8245. For
> > a first test I connected the BDI2000 and at the telnet window a can
> > see the u-boot code (md 0xfff00100) and can single-step through it.
> > 1) general question:
> > I removed DRAM etc initialization from the config. file because 
> 
> Good idea.
> 
> > it will be initialized from the u-boot code. Will it work 
> that way or is
> > DRAM
> > access needed for proper work of BDI2000/gdb?
> 
> Yes, this is exactly what you should do. It will work that way.
> 
> > 2) Problem:
> > Now I start the gdb and attach it to the BDI2000 
> > ((gdb) target remote bdi:2001)
> > After that I cannot see the code in flash anymore - md command in 
> > telnet window returns all "0". Disassemble in gdb also 
> returns all "0".
> > What did I make wrong?
> 
> Which commands did  you  enter  at  the  GDB  prompt?  Is  there  any
> ".gdbinit" file in action? What does it contain?
> 
No, there is no .gdbinit file in my $HOME.
This is how I start gdb:

tode at gagarin:~ -> gdb
GNU gdb 2002-04-01-cvs
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "powerpc-linux".	
	---> until here I can see my code in flash
(gdb) target remote bdi:2001
Remote debugging using bdi:2001
0xfff00100 in ?? ()	
	---> returns all "0"
(gdb) detach
Ending remote debugging.
(gdb) target remote bdi:2001
Remote debugging using bdi:2001
0xfff00100 in ?? ()
(gdb)

> Best regards,
> 
> Wolfgang Denk
> 
> -- 
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
> Thought for the day: What if there were no hypothetical situations?
>