gdb support for ppcbug

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>>>>> "Stan" == Stan Shebs <shebs@cygnus.com> writes:

    Stan> rj@eli.elilabs.com (Robert J. Brown) writes:
    >> I am working on a project using a MCP750 Compact PCI board.
    >> This board has a JTAG/BDM capability, but only to the extent
    >> that there are pads on the artwork; there are no pins soldered
    >> into the pads.  This is apparently because they would stick up
    >> and interefere with the memory card that sits piggyback on the
    >> board.  We were planning to use the SDS Single Step BDM
    >> debugger, but I do not think that will work now, due to the
    >> mechanical fit problem.

    Stan> D*mn physics... :-)

It has actually been reported by a hardware guy that if I crimp pins
on wires but do not push them into the plastic connector body, that it 
can be made to work.  :-)

Nonetheless, I still would like a gdb solution that does not rely on
having a cross-debug kernel pre-loaded in order to work.  The ppcbug
solutions seem like a very good one to me, being an old hand at emacs
and gdb.

    >> I heard somewhere that there is an extension to gdb that allows
    >> gdb to gain control of the board by sending and receiving
    >> PPCbug commands instead of using the remote gdb support code in
    >> the target.  This would be great.  Does anyone know abything
    >> about this?

    Stan> Yes, it's been in the GDB sources for a long time actually.
    Stan> From "help target":

    Stan> target ppcbug -- Debug via the PowerPC PPCBug monitor using
    Stan> port 0 target ppcbug1 -- Debug via the PowerPC PPCBug
    Stan> monitor using port 1

    Stan> PPCBug's prompt is different depending on which port it's
    Stan> talking to, thus the two slightly different target commands.

So do I have to recompile the cross gdb to get this working?  I
suspect so.  That would not be such a pain, except for the fact that
we are doing development from NT.  :-<

I could always build a set of tools under Linux ala Canadian cross, so 
things would compile.  Can I also do this under cygwin on NT?

-- 
--------  "And there came a writing to him from Elijah"  [2Ch 21:12]  --------
R. J. Brown III  rj@elilabs.com http://www.elilabs.com/~rj  voice 847 543-4060
Elijah Laboratories Inc. 457 Signal Lane, Grayslake IL 60030  fax 847 543-4061
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