Help with Remote debbugging of PowerPC

[Murray]

Can anyone help with a problem I'm having getting GDB talking to a
remote target. I'm trying to get GDB working with an application
running on a proprietary board with a Motorola MPC755. The comms is
through shared memory, so I have written a TCP/IP socket to shared
memory comms program, and use the 'target remote <host>:<port>'
command in GDB to start things off.

I have taken the ppc-stub file and modified it to work with our
application, and I start to get GDB talking the to remote program, but
when it asks for the registers ($g#67) and we send back the contents,
GDB reports -

Couldn't establish connection to remote target
procfs: couldn't find pid 42000 in procinfo list.

I am running GDB under Solaris 2.8. Do I need to build gdb for the
power-pc target or does it automatically determine the target type ?

Is there any more documentation on remote debugging other than the GDB
manual at gnu.org ?

I'm pretty sure the comms are ok because I'm dumping the data
following through the socket and I see the following:

from socket data[9]='+$Hc-1#09'
from card data[7]='+$OK#9a'
from socket data[7]='+$qC#b4'
from card data[5]='+$#00'
from socket data[13]='+$qOffsets#4b'
from card data[5]='+$#00'
from socket data[6]='+$?#3f'
from card data[8]='+$S05#b8'
from socket data[8]='+$Hg0#df'
from card data[7]='+$OK#9a'
from socket data[6]='+$g#67'
from card data[1]='+'
from card 
data[260]='$fff0cbdcffffffa8fff0f0b8fff1a0d8fff1a51000009070000000000000000700000007ffffff58fffffe58ffffffa800010000fff1a49000000000000000000000000000000000000000000000000000000000fff141b0fff141b0fff10000fff10000ffffff98ffffffa8ffffffb0fff10000fff1448cfff14488ffffffe0#04'
from socket data[1]='+'
other end closed
the client has disconnected

The regsiter contents is this example are shorter than the full list
in ppc-stub.c, as I thought there might have been too much data.

Any help or pointers would be great.

Thanks,

Murray.