Re: [RFA/rs6000-aix] software_single_step gdbarch method no longer set

[Joel Brobecker <brobecker@adacore.com>]

Hey Daniel,

I am just realizing that I never got around to answering you.

> I have not looked at the patch much (won't this year).  However, if
> you're feeling especially motivated, we could sidestep this issue...
> there's a related cleanup I've been meaning to do for a long while.
> 
> The software single step method in the gdbarch is always used if it is
> set.  But, that doesn't make a lot of sense.  The gdbarch method should
> mean "software single step is supported"; the predicate "software
> single step is required" should live in the target vector instead! 
> It's a property of the target.  e.g. MIPS GNU/Linux doesn't implement
> PTRACE_SINGLESTEP, but if you're connected to a kernel debugging
> session using a hardware ICE, then maybe you've really got hardware
> single step.

Makes sense, but ...

> It's unfortunately a little trickier than that since remote targets
> don't currently report whether using software singlestep is OK :-(
> So setting the default behavior may not be simple.  I know gdbserver
> needs some adjustment here.

I don't have that much time in the forseeable future to work on this,
unfortunately. I would also like to work on some other cleanup
activities, including the procfs stuff (which I promised to Mark and
yet haven't had time to look at).

So I'd rather see if my proposal can go in for now.

Thanks,
-- 
Joel