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Date: Thu, 10 Dec 2015 10:42:27 -0800
From: Kees Cook <>
To: "" <>
Cc: Catalin Marinas <>, PaX Team <>
Subject: Re: Self Introduction

I've put the matrix up on the wiki here:

On Thu, Dec 10, 2015 at 9:55 AM, Daniel Micay <> wrote:
>> ARMv8 64-bit: ??
> The worst case scenario would be doing something like the x86_64 UDEREF.
>> x86 pre-late-Broadwell: nothing upstream (though UDEREF in PaX exists)
> It's worth noting that there's the pre-PCID implementation (slow and
> vulnerable to races) and then two choices of better implementations when
> PCID is available. You probably know that already, but it's not obvious
> to everyone else.

Yeah. PCID was Sandybridge and later?


Kees Cook
Chrome OS & Brillo Security

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