On 12/08/16 12:20, Borislav Petkov wrote: > On Thu, Dec 08, 2016 at 12:08:53PM -0800, Linus Torvalds wrote: >> Especially since that's some of the ugliest inline asm ever due to the >> nasty BX handling. > > Yeah, about that: why doesn't gcc handle that for us like it would > handle a clobbered register? I mean, it *should* know that BX is live > when building with -fPIC... The .ifnc thing looks really silly. > When compiling with -fPIC gcc treats ebx as a "fixed register". A fixed register can't be spilled, and so a clobber of a fixed register is a fatal error. Like it or not, it's how it works. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
