GDB for Mips Variant Multiprocessor system

[Rama Singh <rama10nov at yahoo dot co dot in>]

Hi,
I am working on the GNU toolchain for a Mips variant
multiprocessor syasem. I have ported GNU binutils for
the same. Now I am looking for porting GDB. I found
that there is some work on the MIPS EJTAG
implementation for GDB. I don't know how stable it is.
Basically my hardware has 4 Mips core in a bunch of 4.
So in each bunch you have shared memory accesses too
and at any time 16 threads can run in parallel. The
requirement is that you can get the debug info of any
of these threads at any given time. I am planning to
have a gdb server on a host machine that will
communicate with the gdb stab on _each_ of these
threads.
Now my question is
a) Is it possible to have just one EJTAG port to
communicate with as many threads?
b) How big the task is of having gdb stabs implemented
for each of these threads?
c) Stablity of the gdb ejtag for mips
http://gdbmipsejtag.sourceforge.net

Any help in this front shall be very useful.
Thanks in advance

Regards
Rama Singh


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