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, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>