linux-kernel - Re: [PATCH] arm64: kvm: use -fno-jump-tables with clang

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 18 May 2018 10:40:06 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     marc.zyngier@....com
Cc:     Sami Tolvanen <samitolvanen@...gle.com>, christoffer.dall@....com,
        Takahiro Akashi <takahiro.akashi@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: kvm: use -fno-jump-tables with clang

On Fri, May 18, 2018 at 10:30 AM Marc Zyngier <marc.zyngier@....com> wrote:
> I'm going to ask the question I've asked before when this patch cropped
> up (must be the 4th time now):

> Is it guaranteed that this is the only case where LLVM/clang is going to
> generate absolute addresses instead of using relative addressing?

It seems like if there's requirements that only relative addressing be
used, then the compiler should be told explicitly about this restriction,
no?
-- 
Thanks,
~Nick Desaulniers