Re: [RFC][v7][PATCH 8/9]: Define clone2() syscall

On Wed, 30 Sep 2009, Arnd Bergmann wrote:

One more argument for this is that the new code is architecture independent
using user_stack_pointer(), while the original sys_clone is highly
architecture specific, which is a source for bugs when trying to
extend it.

Umm. I don't think that is possible.

You need architecture-specific code to even get access to all registers to 
copy and get a signal-handler-compatible stack frame. See for example 
arch/alpha/kernel/entry.S with the switch-stack thing etc.  I don't think 
there is any way to make that even remotely architecture-neutral.

			Linus