Op Wed, 27 Sep 2017 16:44:01 +0200 schreef Theo de Raadt
<dera...@openbsd.org>:
Firefox has W^X compliance and so runs with the secure defaults.
it uses page aliasing, which is a shitty way of being compliant
Do you mean dual-mapping a.k.a. double-mapping? I found some old patches
using a temporarily file and mmap w/ fd to achieve this, but they never
went in.
This blog:
https://jandemooij.nl/blog/2015/12/29/wx-jit-code-enabled-in-firefox/
suggests that it is simply switching between RW and RX using mprotect.
Can you please elaborate?
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