17.02.2016 10:21, Ingo Molnar пишет: > > * Andy Lutomirski <[email protected]> wrote: > >> + * If the kernel ever adds explicit fs, gs, fsbase, and gsbase >> + * save/restore, it will most likely need to be opt-in and use >> + * different context slots. > > Btw., that's not necessarily true: it could also be made opt-out, and a > modify_ldt() or any other cleanly identifiable legacy usage/signature that is > associated with DOSEMU might trigger the opt-out automatically as well. But there are the new versions of dosemu that still use "modify_ldt() or any other cleanly identifiable legacy usage/signature" and yet wants a new functionality. Please don't go for such an unreliable heuristic.
> I.e. behaviorally it would still keep the ABI and modern default behavior > could > still be whatever we want to make it. You can allow glibc to deal with the opt-ins. It has symbol versioning system AFAIK exactly for that.
