linux-kernel - Re: [PATCH 13/15] arm64: add a workaround for GNU gold with ARM64_MODULE

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Message-ID: <20171103202902.GC137924@samitolvanen.mtv.corp.google.com>
Date:   Fri, 3 Nov 2017 13:29:02 -0700
From:   Sami Tolvanen <samitolvanen@...gle.com>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Greg Hackmann <ghackmann@...gle.com>
Subject: Re: [PATCH 13/15] arm64: add a workaround for GNU gold with
 ARM64_MODULE_PLTS

On Fri, Nov 03, 2017 at 08:09:42PM +0000, Ard Biesheuvel wrote:
> This is not true. Even when RANDOMIZE_MODULE_REGION_FULL is not
> enabled, we may need module PLTs.

Got it. PLTs themselves are not a problem with gold, only the bug when
processing a linker script of this particular format. I'll see if I can
find a better workaround for this for v2.

Sami