Hi,

Peter Maydell schrieb:
> On 25 March 2011 10:54, Alex Zuepke <azuepke@sysgo.com> wrote:
>> while digging through some problems with BKPT exceptions on ARM, I
>> discovered that QEMU does not update IFSR on prefetch aborts. This
>> should be done since ARMv6 according to ARM docs. Please include.
> 
> This patch is the wrong approach to fixing this bug -- the
> updating of the IFSR needs to be done when the exception
> is taken, not when we translate the breakpoint instruction.
> 
> I'll put this on my todo list. If you happen to have a convenient
> test case demonstrating the problem, that would make a fix happen
> faster ;-)
> 
> -- PMM

I tried to fix it, new patch attached.
But I'm not sure if it is required for semihosting as well.

On ARMv7-M bkpt works differently, and debug registers aren't
implemented yet, so I didn't touch it.

Best Regards,
Alex

-- 
Alexander Zuepke                                azuepke@sysgo.com
SYSGO AG ~ Am Pfaffenstein 14 ~ 55270 Klein-Winternheim ~ Germany