Re: Patch 4/6 randomize the stack pointer

[Christoph Hellwig]

On Thu, Jan 27, 2005 at 03:40:48PM -0500, Rik van Riel wrote:
> On Thu, 27 Jan 2005, Christoph Hellwig wrote:
> 
> >>+unsigned long arch_align_stack(unsigned long sp)
> >>+{
> >>+	if (randomize_va_space)
> >>+		sp -= ((get_random_int() % 4096) << 4);
> >>+	return sp & ~0xf;
> >>+}
> >
> >this looks like it'd work nicely on all architectures.
> 
> I guess it should work for all architectures using ELF,
> not sure if it might break some of the more obscure
> architectures ...

So it works for all CONFIG_MMU architectures.  Arjan mentioned that
the minimum stack alignment might be different, so the 4 should
become a per-arch constant and we can make the code unconditional
for CONFIG_MMU?
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