Re: [patch 2/3] Implement support for PowerPC BookE ranged watchpoints

[Thiago Jung Bauermann <bauerman@br.ibm.com>]

On Sat, 2010-11-27 at 17:47 +0000, Pedro Alves wrote:
> On Friday 26 November 2010 21:15:22, Thiago Jung Bauermann wrote:
> > So in your opinion, the watch command should always use two watchpoint
> > registers to set up a ranged watchpoint in BookE ppc? I'm a bit
> > reluctant to use all the watchpoint registers to set up one
> > watchpoint...
> 
> Blame the hardware designers, not me.  :-)

Well, you know hardware designers. They're transistor counters. :-)

> WDYT?  Sounds reasonable?  I'd prefer doing these changes
> as first step.

Thank you very much for the detailed plans! I'm very sorry about my
delay answering this. I'm waiting for internal feedback about this
option.

> I haven't looked yet at what kind of masks
> masked watchpoints support, but if they only support masks in the form
> of (binary) 11110000, 1111111100, etc. (no alternating 1s and 0s),
> then no target_insert_watchpoint or remote protocol change is
> required either for those.

Masked watchpoints support arbitrary masks, so they warrant their own
place under the sun. :-)  They be considered independently of ranged
watchpoints then.
-- 
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center