linux-kernel - Re: [PATCH 5/7] arm64: keep .altinstructions and .altinstr

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Message-ID: <CAKwvOdn9TEO3G9+7DsQ+mR-nf=50Moydfvft=h_RketDZ2iODA@mail.gmail.com>
Date:   Thu, 30 Nov 2017 09:00:35 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Nicholas Piggin <npiggin@...il.com>
Cc:     Sami Tolvanen <samitolvanen@...gle.com>,
        Alex Matveev <alxmtvv@...il.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Greg Hackmann <ghackmann@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        linux-arm-kernel@...ts.infradead.org,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Maxim Kuvyrkov <maxim.kuvyrkov@...aro.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Yury Norov <ynorov@...iumnetworks.com>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: Re: [PATCH 5/7] arm64: keep .altinstructions and .altinstr_replacement

On Wed, Nov 29, 2017 at 5:58 PM, Nicholas Piggin <npiggin@...il.com> wrote:
> (Comparing `readelf -S` before/after is a way to spot bugs.)

Do you have a script that can be used to diff 2 `readelf -S`, look for
missing references, and report an error? Might be easier to rerun that
every so often and see what's missing.