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From:   Arvind Sankar <nivedita@alum.mit.edu>
Date:   Tue, 14 Jul 2020 16:21:00 -0400
To:     Sedat Dilek <sedat.dilek@gmail.com>
Cc:     Arvind Sankar <nivedita@alum.mit.edu>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
        Nick Desaulniers <ndesaulniers@google.com>,
        Fangrui Song <maskray@google.com>,
        Dmitry Golovin <dima@golovin.in>,
        Clang-Built-Linux ML <clang-built-linux@googlegroups.com>,
        Ard Biesheuvel <ardb@kernel.org>,
        Masahiro Yamada <masahiroy@kernel.org>,
        Daniel Kiper <daniel.kiper@oracle.com>,
        Kees Cook <keescook@chromium.org>,
        Nathan Chancellor <natechancellor@gmail.com>,
        Arnd Bergmann <arnd@arndb.de>,
        "H . J . Lu" <hjl@sourceware.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 0/7] x86/boot: Remove runtime relocations from
 compressed kernel
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On Tue, Jul 14, 2020 at 10:08:04PM +0200, Sedat Dilek wrote:
> > >
> > > In any case, I think the right fix here would be to add -pie and
> > > --no-dynamic-linker to LDFLAGS_vmlinux instead of KBUILD_LDFLAGS.
> >
> > Hmm, you might be right with moving to LDFLAGS_vmlinux.
> >
> 
> We will need the "ifndef CONFIG_LD_IS_LLD" as -r and -pie cannot be
> used together.
> Is that the or not the fact when moving to LDFLAGS_vmlinux?

LDFLAGS_vmlinux will only be used to link boot/compressed/vmlinux,
whereas KBUILD_LDFLAGS is used for all linker invocations, and in
particular the little link to do the modversions stuff ends up using it.

So once we move -pie --no-dynamic-linker to the more correct
LDFLAGS_vmlinux and/or stop modversions running, we'll be fine. Being
able to use -pie with lld is one of the goals of this series.

> 
> I cannot test as I modified my local Git and re-invoking my
> build-script is doing a whole new build-dance.
> 
> - Sedat -