linux-kernel - Re: [PATCH v2 2/2] arm64: Kconfig: ptrauth: Add binutils version check to fix mismatch

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Message-ID: <20200401122805.GD9434@mbp>
Date:   Wed, 1 Apr 2020 13:28:22 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Amit Daniel Kachhap <amit.kachhap@....com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Vincenzo Frascino <Vincenzo.Frascino@....com>,
        Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] arm64: Kconfig: ptrauth: Add binutils version
 check to fix mismatch

On Mon, Mar 30, 2020 at 05:11:39PM +0530, Amit Daniel Kachhap wrote:
> Recent addition of ARM64_PTR_AUTH exposed a mismatch issue with binutils.
> 9.1+ versions of gcc inserts a section note .note.gnu.property but this
> can be used properly by binutils version greater than 2.33.1. If older
> binutils are used then the following warnings are generated,
> 
> aarch64-linux-ld: warning: arch/arm64/kernel/vdso/vgettimeofday.o: unsupported GNU_PROPERTY_TYPE (5) type: 0xc0000000
> aarch64-linux-objdump: warning: arch/arm64/lib/csum.o: unsupported GNU_PROPERTY_TYPE (5) type: 0xc0000000
> aarch64-linux-nm: warning: .tmp_vmlinux1: unsupported GNU_PROPERTY_TYPE (5) type: 0xc0000000

I queued both patches for 5.7. Thanks.

-- 
Catalin