Messages in this thread | | | Date | Sat, 12 Jul 2014 20:37:48 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH 2/2] x86_64,signal: Remove 'fs' and 'gs' from sigcontext |
| |
> This seems like it's asking for trouble. I think wxe'd have to > separately save the selectors and the base registers to avoid breaking > something, especially once wrgsbase, etc are enabled.
I agree, it would likely break existing code.
> Linus, for context, the other patch in this series saves and restores > SS.
> Without that, 64-bit sigreturn to a nondefault stack segment is > basically impossible.
Why would you ever want to do that?
-Andi
| |