Re: [PATCH v3] [gdb] Add Z80 CPU basic support

[Sergey Belyashov via Gdb-patches <gdb-patches@sourceware.org>]

> GCC is not required, it is possible to write a board file that specifies
> another compiler.  It would be good to have a board file that allows a
> developer to test a change against Z80.  A bit like
> testsuite/boards/simavr.exp for AVR.

There is no gdb-compatible simulator yet.

> So, do we need to mention eZ80 at all?  Can't we just talk about Z80 and
> never talk about eZ80?

eZ80 in Z80 mode has additional instructions. Theoretically, GDB may
support eZ80 in ADL mode too, but I do not test it (I have no
simulator and device).

> Ok, it would be good to give an example of how to use it, otherwise it's
> pretty much dead code (like all other files in this directories are).

I will add a small instruction on how to embed it to the project to
the stub source.

> Most people won't actually have a device and setup to play with.  Would
> it be possible to provide some explicit/clear steps for somebody to run
> and debug an hello world program using any simulator?  Either using the
> stub you have provided, or I see there's a qemu Z80 port, does it work
> to debug against that?

There is a modified version required: https://github.com/b-s-a/qemu-z80
but it is based on a qemu snapshot from 2012 year and does not work for me.

Best regards,
Sergey Belyashov