On Mon, Dec 14, 2015 at 3:44 PM, Dave Hansen <[email protected]> wrote: > On 12/14/2015 03:39 PM, Andy Lutomirski wrote: >>> > Nope. My linker-fu is weak. >>> > >>> > Can we even depend on the linker by itself? Even if the sections were >>> > marked --x, we can't actually use them with those permissions unless we >>> > have protection keys. >>> > >>> > Do we need some special tag on the section to tell the linker to map it >>> > as --x under some conditions and r-x for others? >>> > >> Why? Wouldn't --x just end up acting like r-x if PKRU is absent? > > An app doing --x would expect it to be unreadable. I don't think we can > just silently turn it in to r-x.
I don't see why. After all, an app doing --x right now gets rx. An app doing r-- still gets r-x on some systems. --Andy -- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
