On Tue, Mar 15, 2005 at 10:23:54AM -0500, Albert Cahalan wrote: > On Mon, 2005-03-14 at 19:22 -0800, Christoph Lameter wrote: > > On Mon, 14 Mar 2005, Albert Cahalan wrote: > > > > > When the vsyscall page is created, copy the one needed function > > > into it. The kernel is already self-modifying in many places; this > > > is nothing new. > > > > AFAIK this will only works on ia32 and x86_64 and not definitely not > > on ia64. Who knows about the other platforms .... > > I'll bet it does work fine on IA-64. If it didn't, you would > be unable to load the kernel or load an executable. > > I know it works for PowerPC. You'll need an isync instruction > of course. You may also want a sync instruction and some code > to invalidate the cache. > > Setting up the page content should be a 1-time operation done > at boot. Check your processor manuals as needed.
Won't work on ARM. We have XIP kernels, which prevents the use of self-modifying code. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - 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/
