Hi Alex,
Sorry for the late reply, I've been out of office and did not check my
mail.
On 05/08/2025 17:30, Alex Bennée wrote:
I think to read the PC we would just need to make sure we properly
resolve it - internally QEMU does this for faults with:
tb = tcg_tb_lookup(retaddr);
cpu_restore_state_from_tb(cpu, tb, retaddr);
where retaddr is the address of the translated code. We just need to
special case PC handling in the read path.
*snip*
No need - we just need to exit the loop via cpu_loop_exit_restore() and
the code will do the right thing. However we probably don't want to
trigger that via register write as we would surprise the plugin -
especially if there are other hooks still to run. So we would want an
explicit helper to do it.
Is this something the QEMU maintainers would be interested in? If yes,
I'm happy to dig into the codebase and submit some patches for review.
But this of course depends on whether such a feature is even desirable
in QEMU (cf. the parallel discussion thread).
Best regards,
Florian
