Re: Hardware watchpoint support for MIPS?

On Thu, Mar 20, 2008 at 09:22:55AM -0700, David Daney
wrote:
> GDB has had support for i386 debug registers on linux
for quite some time 
> now.
>
> I was wondering if anyone has worked on similar support
for the hardware  
> debug support available in some MIPS processors?

The issue's not GDB support, but kernel support.  I've seen
several
proposals to expose watchpoint registers over ptrace on
MIPS, but so
far none of them have merged.  The usual place they bog down
is how to
explain to GDB what capabilities are available; x86 has it
easy,
there's basically only one type.

-- 
Daniel Jacobowitz
CodeSourcery

On Thu, 2008-03-20 at 13:01 -0400, Daniel Jacobowitz wrote:
> On Thu, Mar 20, 2008 at 09:22:55AM -0700, David Daney
wrote:
> > GDB has had support for i386 debug registers on
linux for quite some time 
> > now.
> >
> > I was wondering if anyone has worked on similar
support for the hardware  
> > debug support available in some MIPS processors?
> 
> The issue's not GDB support, but kernel support.  I've
seen several
> proposals to expose watchpoint registers over ptrace on
MIPS, but so
> far none of them have merged.  The usual place they bog
down is how to
> explain to GDB what capabilities are available; x86 has
it easy,
> there's basically only one type.

That's a problem in Power as well... What's currently there
is
simplistic and hardly adequate.
-- 
[]'s
Thiago Jung Bauermann
Software Engineer
IBM Linux Technology Center