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From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Will Deacon <will@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>
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        =?UTF-8?q?F=C4=81ng-ru=C3=AC=20S=C3=B2ng?= <maskray@google.com>,
        Alan Modra <amodra@gmail.com>,
        Ard Biesheuvel <ardb@kernel.org>,
        Peter Smith <Peter.Smith@arm.com>,
        Quentin Perret <qperret@google.com>,
        linux-kernel@vger.kernel.org, stable <stable@vger.kernel.org>,
        clang-built-linux <clang-built-linux@googlegroups.com>
Subject: Re: [PATCH v2] arm64: link with -z norelro for LLD or aarch64-elf
Date:   Tue,  5 Jan 2021 12:26:03 +0000
Message-Id: <160984952218.5069.304716966175823056.b4-ty@arm.com>
In-Reply-To: <20201218002432.788499-1-ndesaulniers@google.com>
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On Thu, 17 Dec 2020 16:24:32 -0800, Nick Desaulniers wrote:
> With GNU binutils 2.35+, linking with BFD produces warnings for vmlinux:
> aarch64-linux-gnu-ld: warning: -z norelro ignored
> 
> BFD can produce this warning when the target emulation mode does not
> support RELRO program headers, and -z relro or -z norelro is passed.
> 
> Alan Modra clarifies:
>   The default linker emulation for an aarch64-linux ld.bfd is
>   -maarch64linux, the default for an aarch64-elf linker is
>   -maarch64elf.  They are not equivalent.  If you choose -maarch64elf
>   you get an emulation that doesn't support -z relro.
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64: link with -z norelro for LLD or aarch64-elf
      https://git.kernel.org/arm64/c/311bea3cb9ee

Also added the second Fixes tag with a cc stable.

-- 
Catalin