Implementation of different software breakpoint kinds in gdb server

[Yao Qi]

On 10/18/2012 06:08 PM, Pedro Alves wrote:
> Offhand, the main issues with tracepoints on ARM are:
>
> #1 - gdbserver needs to know how to step over the tracepoints, without gdb's intervention.
>
> #2 - ARM can't hw single-step, so that needs to be done the hard way, with breakpoints
>      (a.k.a., software single-step).
>      All the logic to do that is in gdb.  This conflicts with #1.
>
> So we'd need to teach gdbserver to software single-step.  Maybe it's possible
> to tell offline all the possible destinations of an instruction, so we could still
> leave that logic in gdb, but I suspect not.

I am wondering that it might be relatively easier to implement fast 
tracepoint in which step-over is not needed, if finding a jumppad is not 
a problem :)

-- 
Yao