Re: proposed PATCH: make watchpoints work correctly

["Eli Zaretskii" <eliz at elta dot co dot il>]

> Date: Wed, 28 May 2003 16:27:33 -0400
> From: Paul Koning <pkoning@equallogic.com>
> 
>  Eli> The above description made me nervous: it almost sounds like the
>  Eli> current watchpoint support is pretty much dysfunctional, as most
>  Eli> of the changes you suggest are not specific neither to remote.c
>  Eli> nor to HAVE_NONSTEPPABLE_WATCHPOINT.  So could you please
>  Eli> explain how, given those deficiencies, watchpoints do work for
>  Eli> native targets such as x86, but did not work for your target?
> 
> I'm not sure. I just built a gdb for x86 on NetBSD, and all I get is
> software write watchpoints, no hardware watch support seems to be
> present.

That's strange: I thought hardware-assisted watchpoints were supported
for all native x86 platforms.  Mark, could you please help us out
here? is NetBSD an exception?

I don't have time right now to read the parts of breakpoint.c that you
describe, but I promise to do that later today.  Thanks for taking
time to explain your reasoning.

> The purpose of this patch submission is to
> get input from experts -- not necessarily to claim that the fix I
> submitted is the best way to solve the problem...

Certainly, I understand that.  I just was surprised that your
description of the problem was so different from my recollection of
how watchpoints work.