Re: [RFA] set/show enable-software-singlestep

[Daniel Jacobowitz <drow@false.org>]

On Wed, Jun 25, 2008 at 03:14:38PM +0100, Pedro Alves wrote:
> A Wednesday 25 June 2008 14:34:57, Daniel Jacobowitz wrote:
> >
> > I think it should already be auto.  can-use-software-singlestep is
> > unintuitive - either do use it, don't use it, or use GDB's best
> > judgement.  And if the user selects to use it and it isn't supported,
> > that's an error when we next want to singlestep.  WDYT?
> 
> Well, not really auto.  If a ARM stub does software singlestepping itself
> (say we add it to gdbserver), gdb will still do software
> single-stepping (breakpoint dance), wont it?

What Joel said elsewhere in the thread just now.  If we get a stub
that reports definitively that it can single step, that should take
priority over GDB knowing that software singlestep is implemented for
this architecture.

Um, uh-oh.  This will break the overloading of software single step
for bypassing atomic operations.  Clearly more thought is required!

Another unfortunate note: we can't trust the vCont reply for this even
though it's clearly the right thing :-(  Since current versions of GDB
reject replies without s/S.

-- 
Daniel Jacobowitz
CodeSourcery