linux-kernel - Re: [PATCH 1/2] powerpc/vdso64: link vdso64 with linker

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Message-ID: <3d837a36-a186-6789-7924-eaa97f056b68@csgroup.eu>
Date:   Wed, 2 Sep 2020 20:02:00 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Christophe Leroy <christophe.leroy@....fr>,
        Joe Lawrence <joe.lawrence@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Fangrui Song <maskray@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Nicholas Piggin <npiggin@...il.com>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH 1/2] powerpc/vdso64: link vdso64 with linker



Le 02/09/2020 à 19:41, Nick Desaulniers a écrit :
> On Wed, Sep 2, 2020 at 5:14 AM Michael Ellerman <mpe@...erman.id.au> wrote:
>>
>> Nick Desaulniers <ndesaulniers@...gle.com> writes:
>>> Fixes: commit f2af201002a8 ("powerpc/build: vdso linker warning for orphan sections")
>>
>> I think I'll just revert that for v5.9 ?
> 
> SGTM; you'll probably still want these changes with some modifications
> at some point; vdso32 did have at least one orphaned section, and will
> be important for hermetic builds.  Seeing crashes in supported
> versions of the tools ties our hands at the moment.
> 

Keeping the tool problem aside with binutils 2.26, do you have a way to 
really link an elf32ppc object when  building vdso32 for PPC64 ?

Christophe