Watch point support for PPC and Linux with GDB

Watch point support for PPC and Linux with GDB

[Jeff Dallacqua]

Hello,

           Can anybody give me some specifics about what sort of watch
point support GDB 6.7.1 has running on a Freescale 8540 with Linux?
Neither hardware nor software watch points seem to behave properly,
even though both can be set. The watch points can be set but execution
never stops when those memory locations are written to or read from.
Looking over previous postings it seems like perhaps hardware watch
points aren't supported but I'm not even able to get them to work in
software.

Thanks!

Re: Watch point support for PPC and Linux with GDB

[Thiago Jung Bauermann]

On Wed, 2008-08-20 at 09:33 -0700, Jeff Dallacqua wrote:
>            Can anybody give me some specifics about what sort of watch
> point support GDB 6.7.1 has running on a Freescale 8540 with Linux?
> Neither hardware nor software watch points seem to behave properly,
> even though both can be set. The watch points can be set but execution
> never stops when those memory locations are written to or read from.
> Looking over previous postings it seems like perhaps hardware watch
> points aren't supported but I'm not even able to get them to work in
> software.

Luis recently committed a patch adding basic support for BookE hardware
watchpoint:

http://sourceware.org/ml/gdb-patches/2008-08/msg00087.html

You would also need this fix from Ulrich:

http://sourceware.org/ml/gdb-patches/2008-08/msg00321.html

And Luis' kernel patch which is mentioned in the first link. It will
show up in 2.6.27.

I don't know about the software watchpoint issues...
-- 
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center