linux-kernel - Re: [PATCH] arm: vdso: pass --be8 to linker if necessary

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Date:   Tue, 18 Jun 2019 23:56:11 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: [PATCH] arm: vdso: pass --be8 to linker if necessary

Hi.

On Fri, May 31, 2019 at 5:20 PM Jason A. Donenfeld <Jason@...c4.com> wrote:
>
> Hey Masahiro,
>
> I'm not sure exactly. I did just notice another place --be8 is being added:

That is not my question.

I just asked about your commit log:
"big-endian ARM was relying on gcc to translate
its -mbe8 option into ld's --be8 option"

I grepped '-mbe8', but I did not see it anywhere
in the source tree.

So, I just wondered where it came from.


> ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
> LDFLAGS_vmlinux += --be8
> KBUILD_LDFLAGS_MODULE   += --be8
> endif
>
> I suppose it's possible that this is kbuild related where one of those
> isn't winding up in the right place. I did see that the commit that
> this patch addresses uses "=" instead of the more usual ":=" or "+="
> for whatever reason.
>
> Jason

Perhaps, the following will be cleaner:

ldflags-$(CONFIG_CPU_ENDIAN_BE8) += --be8
ldflags-y += -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
            -z max-page-size=4096 -z common-page-size=4096 \
            -nostdlib -shared \
            $(call ld-option, --hash-style=sysv) \
            $(call ld-option, --build-id) \
            -T


I think this fix-up should be applied by Russell.
Please note he does not pick up patches directly from ML.
To ask him to pick up patches, you need to put
patches into his patch tracker.
(patches@....linux.org.uk)


-- 
Best Regards
Masahiro Yamada