linux-kernel - Re: [PATCH v3] arm64: lds: move .got section out of .text

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Date:   Tue,  2 May 2023 13:14:16 +0100
From:   Will Deacon <will@...nel.org>
To:     Fangrui Song <maskray@...gle.com>,
        linux-arm-kernel@...ts.infradead.org,
        Catalin Marinas <catalin.marinas@....com>,
        Ard Biesheuvel <ardb@...nel.org>
Cc:     kernel-team@...roid.com, Will Deacon <will@...nel.org>,
        Bill Wendling <morbo@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] arm64: lds: move .got section out of .text

On Tue, 2 May 2023 07:41:05 +0000, Fangrui Song wrote:
> Currently, the .got section is placed within the output section .text.
> However, when .got is non-empty, the SHF_WRITE flag is set for .text
> when linked by lld. GNU ld recognizes .text as a special section and
> ignores the SHF_WRITE flag. By renaming .text, we can also get the
> SHF_WRITE flag.
> 
> The kernel has performed R_AARCH64_RELATIVE resolving very early, and can
> then assume that .got is read-only. Let's move .got to the vmlinux_rodata
> pseudo-segment.
> 
> [...]

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

[1/1] arm64: lds: move .got section out of .text
      https://git.kernel.org/arm64/c/0fddb79bf283

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev