On Mon, Jul 20, 2015 at 10:41:09AM -0700, Andy Lutomirski wrote: > On Mon, Jul 20, 2015 at 8:32 AM, Florian Weimer <fweimer@xxxxxxxxxx> wrote: > > On 07/20/2015 05:31 PM, Andy Lutomirski wrote: > >> On Jul 20, 2015 1:35 AM, "Florian Weimer" <fweimer@xxxxxxxxxx> wrote: > >>> > >>> On 07/18/2015 01:33 AM, Andy Lutomirski wrote: > >>> > >>>> I think the API should be "set gsbase to x + y*(cpu number)". On > >>>> x86_64, userspace just allocates a big swath of virtual space and > >>>> populates it as needed. > >>> > >>> This will break WINE and similar applications which use %gs today. > >> > >> Presumably WINE could just opt not to use this facility, just like > >> WINE will have to opt out of whatever the enterprise people who want > >> WRGSBASE were thinking of doing with it. > > > > How is this possible if it's process-global attribute and glibc or some > > library in the process starts using it? > > > > glibc will have to expose a way to turn it off, I guess. (ELF flag?) Or a way to turn it on. - Josh Triplett -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
