Re: Remote watchpoint support.

[jtc at redback dot com (J.T. Conklin)]

>>>>> "Michael" == Michael Snyder <msnyder@redhat.com> writes:

>> Mark Salter wrote:
>> I'm adding hw break/watchpoint support to a remote target. I'm using
>> the Z-packet support that is in remote.c to install/remove the
>> watchpoints and breakpoints. When a watchpoint is triggered by a
>> read access, GDB needs a way to tell if the target stopped because
>> of the watchpoint. This is done through a target specific function:

Michael> That really sounds like more of a gdb thing.  xxx-tdep.c
Michael> should have the knowledge about the registers, though, not
Michael> remote.c.

Well, that's one thing that Mark's change has going for it.  Like the
"Z" packet, the proposed "qWaddr" packet knows nothing about how the
target implements hardware break/watchpoints.  Those details are left
up to the debug agent.  While it's probably processor debug registers,
it could be an external device that speaks the remote debug protocol
and talks to the target over BDM or some other on-chip-debugging tech-
nology.

        --jtc

-- 
J.T. Conklin
RedBack Networks