On Sat, 2007-03-31 at 04:35 +0200, Andi Kleen wrote: > On Saturday 31 March 2007 04:00, Jeremy Fitzhardinge wrote: > > Currently x86 (similar to x84-64) has a special per-cpu structure > > called "i386_pda" which can be easily and efficiently referenced via > > the %fs register. An ELF section is more flexible than a structure, > > allowing any piece of code to use this area. Indeed, such a section > > already exists: the per-cpu area. > > Hmm, I'm a little reluctant. This moves i386 more away from x86-64 > again. If we ever merge them it would mean more work. Do you really need it? Well, I think the merge should go the other way in this case: this really does simplify things. The only thing stopping x86-64 from doing the same as i386 is the stack-protector stuff. And that can be fixed (unfortunately requires a gcc patch to change the %gs:40 to %gs:__gcc_stack_protector_offset and emit a weak absolute symbol __gss_stack_protector_offset = 40). I shall prepare a patch for that next week; I've been busy Kleening up lguest 8) Rusty. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
