Messages in this thread | | | From | Michael Buesch <> | Subject | Re: Really good idea to allow mmap(0, FIXED)? | Date | Fri, 6 Oct 2006 16:44:32 +0200 |
| |
On Thursday 05 October 2006 23:58, Alan Cox wrote: > Ar Iau, 2006-10-05 am 20:59 +0200, ysgrifennodd Michael Buesch: > > Is is really a good idea to allow processes to remap something > > to address 0? > > It is very useful indeed. Consider for example dosemu.
Ok, good point.
> > Besides that, I currently don't see a valid reason to mmap address 0. > > > > Comments? > > User zero is not neccessarily mapped at kernel zero so your argument > isn't portable either.
Eh, so what about the following. We _have_ arches which map user zero to kernel zero. What about specialcasing that on a per-arch case. So remapping user zero to something else in kernel.
-- Greetings Michael. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |