Re: [PATCH] Add proper single-step support for arm-none-eabi

[Elouan Appere <elouan dot appere at club-internet dot fr>]

On 10/04/2017 12:35, Yao Qi wrote:
> Commit 750ce8d only affects arm-linux target.  It doesn't affect
> arm-none-eabi at all.
You're right. Sorry for that wrong claim.

> > Another non-breaking possibilty would be to check whether or not the
> > stub replies an error to "vCont;s" (or the deprecated "s" packet), but
> > this would then make the "s;S" vCont? kind of reply useless.
> We can extend .to_can_do_single_step interface a little to get more
> information.  Current .to_can_do_single_step only returns true if we
> definitely know the target can do single-step, otherwise return false.
> The change .to_can_do_single_step returning tribool (unknown, true and
> false).  true/false means we definitely know the target can/can't do
> single-step, unknown means we don't know that.  In arm-none-eabi target,
> we only use software single step if .to_can_do_single_step returns
> false.  In arm-linux target, we only use hardware single step if
> .to_can_do_single_step returns true.

This would, I think, be the best solution