RE: [ECOS] MPC860 GDB stub problem...

[Gary Thomas <gthomas at redhat dot com>]

On 13-Apr-00 Alexandre D'Alton wrote:
> Hi everybody,
> 
> First of all, I am about to have a port done for the PLX 9054RDK-860
> Board. If somebody is interested, just tell me.
> 
> In fact I have a problem :
> 
> I have compiled successfully the gdb stub and flashed it in rom, and
> when the board boots, the stub sends "#22$T0540:fff04010;01:00003394;"
> repeatedly on the serial port.
> I suppose that the BREAKPOINT macro does not work for my board.
> I would be pleased if somebody could explain me how does the breakpoints
> are or should be implemented on the powerpc port of ecos.
> 
> I wish that you will understand my english.
> 
> Thaks for your help,
> 
> Alexandre d'Alton.

Actually, it looks like it's working fine to me.  When the board resets,
with the GDB stubs in place, it will attempt to connect to a GDB client
program.  You would run this on your host, using a serial connection
to the target board.  You'll need to abandon using the "terminal" program
(minicom, winterm, whatever) that you used to get the message above.

Run the host-side GDB (e.g. on Linux)

  $ powerpc-eabi-gdb 

  (gdb) set remotebaud 38400
  (gdb) tar rem /dev/ttyS0
     -- at this point, the host side GDB communicates with the target (860)
     -- the '+$T0540:fe005d90;01:00004664;#29' message above, then tells
     -- the host program that a connection has been established
  (gdb)