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Re: Display of read/access watchpoints when HAVE_NONSTEPPABLE_WATCHPOINT

Eli Zaretskii wrote:


I could try, but I need help: I need to know how hardware watchpoints
work on supported platforms, including remote ones.  If global and
area maintainers could describe that for systems they know, I will try
to come up with a proposal.


This for a not-yet-submitted remote target, called CRISv32.

It has 6 hardware data watchpoints, configurable as read/write or both (i.e. access). There are no alignment or length restriction on the memory regions that are watched.

When a watchpoint hits, an exception register tells which watchpoints that triggered, and whether they trigged on read or write.

I have defined HAVE_NONSTEPPABLE_WATCHPOINT, to make GDB disable the watchpoint and step over it to evaluate it.

(In addition there is also one hardware instruction breakpoint, but I guess that doesn't matter in this context.)

Check these bug/threads threads for background info.

http://sources.redhat.com/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=967
http://sources.redhat.com/ml/gdb-patches/2002-09/msg00739.html

Andrew


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