Re: Watchpoints in an ARM platform

["Ulisses Furquim" <ulissesf at gmail dot com>]

Hi Daniel,

On 5/31/07, Daniel Jacobowitz <drow@false.org> wrote:
> Correct.  ARM Linux has no support for hardware watchpoints; I don't
> think any ARM platform has watchpoints that can be used in user space
> like i386 / ppc do.  It might be possible to expose the same
> watchpoint controller that JTAG would use though.

Ok, thanks.

> > continue and it correctly stops the program the first time, but when I
> > continue again something goes wrong and gdb gets confused. Do you have
> > any idea why this happens? Am I missing anything here?
>
> A software watchpoint is implemented by repeatedly single stepping.
> You've stepped into something that confused GDB, probably the start of
> a PLT stub for a function from a dynamic library.  I thought recent
> ARM GDB would recognize those stubs fine, but I guess something has
> gone wrong.

Hmm.. a function from a dynamic library? Are you sure? I had only a
simple loop where variable "i" was incremented and then I was printing
something.

Regards,

-- Ulisses