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Re: [cdt-debug-dev] Re: Using hardware breakpoints
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Ray,
Thanks.
We are developing a hardware debugger, so are aware of the issues. We wish to
expose (to the user) the ability of our debugger to set hardware breakpoints.
[Note: in fact most debuggers, including GDB, have this ability. However,
hardware breakpoints are a limited resource (an ARM7 has 2 h/w breakpoints, for
example) and so some management of the resource is essential. Software
breakpoints work by patching a break/exception/interrupt instruction into the
code. This is OK in RAM based systems, but something that is not easily done in
flash/rom based system]
--
Derek
Ray Hurst wrote:
Derek Morris wrote:
Hi,
I was investigating how to add hardware breakpoints to my debugger
support in CDT. I notice that internally hardware breakpoints appear
to be supported, but I can't see how to use them in the UI. Can
anybody throw some light on this?
Thanks,
Derek,
Actually I may have answered too soon.
Hardware breakpoints are IC specific so most generic debuggers rely on
software breakpoints. Software breakpoints work across all CPU's that
belong to the same family and are easier to implement.
Ray
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