On Sun, May 31, 2020 at 12:13:18PM -0400, Keno Fischer wrote:

quoted

Keno -- are you planning to send out a patch? You previously spoke about
implementing this using PTRACE_SETOPTIONS.

Yes, I'll have a patch for you. Though I've come to the conclusion
that introducing a new regset is probably a better way to solve it.
We can then also expose orig_x0 at the same time and give it sane semantics
(there's some problems with the way it works currently - I'll write it up
together with the patch).

I'd worry that having a new ptrace option would be useless bug-
compatibility that is just going to bitrot.

Can you explain why userspace would write a changed value for x7
but at the same time need that new to be thrown away?

That sounds like a nonsensical thing for userspace to be doing.

Cheers
---Dave

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