> The patch below replaces the existing 8Kb randomisation of the userspace
> stack pointer (which is currently only done for Hyperthreaded P-IVs) with a
> more general randomisation over a 64Kb range. 64Kb is not a lot, but it's a
> start and once the dust settles we can increase this value to a more
> agressive value.
Why are we doing this for x86 only, btw?
> +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.
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