24 Apr
2018
24 Apr
'18
5:14 p.m.
On Tue, 24 Apr 2018, Paul Koning via cctalk wrote:
One drawback is that there aren't all that many
SIMH architectures that
have GDB support. VAX does, and Alpha; that's about it. I don't know
how hard it is to do a basic platform in GDB, probably not all that
difficult. At least for machines like PDP-11. One's complement might
be harder (PDP-1), never mind things like the IBM 1620... :-)
You need target BFD and libopcodes support for a GDB port to be possible.
There is such support already present for PDP-11, so wiring in GDB parts
should be straightforward. A remote protocol stub for SimH should also be
easy to write as you don't need all the fancy stuff and GDB will be happy
to work with just the `?', `G', `M', `c', `g', `m' request packets
and the
`S' stop reply packet implemented. The rest is optional.
HTH,
Maciej