From nobody Sun Dec 14 13:52:56 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B3CB018A6D4; Tue, 4 Feb 2025 17:49:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738691351; cv=none; b=m9yIz34yBF1I0faHJkcqn/drglsr5oK+x2d+vQv6IIKdSj2QlNaf8JsncHOp74t8E6l1WT20YPFvEH2ho3m/x7+7gW7nfIjCEHD8xNu5IwoVZVFJJINuCjyBUj5wfvrvC7JUfSF1faVKA017LUPps/vPO7y7WVIy108fvvqSs/s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738691351; c=relaxed/simple; bh=rXAK34OphyEItP6/+639hQrb7zlf+ZgtdRAQ99Mc1xA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=jbil56Qpa7lm5WI5VC8XceXzYoanEF55L51EtDFH27KgcKEnxO5GsP636RyrG8yvsnhThu3U8inzjDXvGKkZtQf6YCA6AKHdYJT+unlpvGirSVPOlmOQRw/CKctfPueKUc7r/uTbEx0NyAYO6jDzqYMZXMD36IKdKEgaYMN42aM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SHtnS5Kt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SHtnS5Kt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5820C4CEDF; Tue, 4 Feb 2025 17:49:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738691351; bh=rXAK34OphyEItP6/+639hQrb7zlf+ZgtdRAQ99Mc1xA=; h=From:Date:Subject:To:Cc:From; b=SHtnS5KtsZ/GOENUm5oQLadqfIxf887yWaCuZngDsiv7/CyDO9QC34fijUzxSRrVQ kngZDnCH3unbXVxFTR1GxMquyEiACyFsVKrPj4yeLVPUlnNETP0mXxW7iswjxU3KlW /McoIFOGzYDLIuIXTUiRu4dlzQ7HXgW8WB1z+iTtn18pR6AMMLGsxZzC/x9kHfcIOh T3da3wf/qvYrWehDk8r5wVS0UMofLrV8hFynf+w7TTf+PY99/jrik4Y1hsfVmA6kxR tytim7CxgxFzQeV/FTL/cQmo6RQkZsCG7Olaw14EdKN/pSFujkGTkWP4PuNtNbF9jn 0fogOD/mQ/kAQ== From: Nathan Chancellor Date: Tue, 04 Feb 2025 10:48:55 -0700 Subject: [PATCH v2] arm64: Handle .ARM.attributes section in linker scripts Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250204-arm64-handle-arm-attributes-in-linker-script-v2-1-d684097f5554@kernel.org> X-B4-Tracking: v=1; b=H4sIAAZTomcC/5WNyw6CMBBFf4V07Rj6AB8r/8OwKGWAiVjItBIN4 d8tJH6Ay3NPcs8iAjJhENdsEYwzBRp9AnXIhOut7xCoSSxUropcKg2Wn6WBpJoBNwAbI1P9ihi APAzkH8gQHNMU4awsoiq01NaJdDkxtvTec/cqcU8hjvzZ67Pc1l/I/BeaJUg4GamLunStNpdbk h6H48idqNZ1/QLKQtx56QAAAA== X-Change-ID: 20250123-arm64-handle-arm-attributes-in-linker-script-82aee25313ac To: Catalin Marinas , Will Deacon Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, stable@vger.kernel.org, Nathan Chancellor X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=2567; i=nathan@kernel.org; h=from:subject:message-id; bh=rXAK34OphyEItP6/+639hQrb7zlf+ZgtdRAQ99Mc1xA=; b=owGbwMvMwCUmm602sfCA1DTG02pJDOmLgkVPWnK9OzmvIvdskY3O/JnndpzanxPoV98gZS8Uo c038eCCjlIWBjEuBlkxRZbqx6rHDQ3nnGW8cWoSzBxWJpAhDFycAjARhamMDB0LlsU8eMydZMf/ Jz9cUGOBxqbSa3cXLD0levu1rdbunX8ZGTa3exwvDM59N3HSnji5A3vPGxt9M9++e3fGg5o/iss j7dkA X-Developer-Key: i=nathan@kernel.org; a=openpgp; fpr=2437CB76E544CB6AB3D9DFD399739260CB6CB716 A recent LLVM commit [1] started generating an .ARM.attributes section similar to the one that exists for 32-bit, which results in orphan section warnings (or errors if CONFIG_WERROR is enabled) from the linker because it is not handled in the arm64 linker scripts. ld.lld: error: arch/arm64/kernel/vdso/vgettimeofday.o:(.ARM.attributes) i= s being placed in '.ARM.attributes' ld.lld: error: arch/arm64/kernel/vdso/vgetrandom.o:(.ARM.attributes) is b= eing placed in '.ARM.attributes' ld.lld: error: vmlinux.a(lib/vsprintf.o):(.ARM.attributes) is being place= d in '.ARM.attributes' ld.lld: error: vmlinux.a(lib/win_minmax.o):(.ARM.attributes) is being pla= ced in '.ARM.attributes' ld.lld: error: vmlinux.a(lib/xarray.o):(.ARM.attributes) is being placed = in '.ARM.attributes' Discard the new sections in the necessary linker scripts to resolve the warnings, as the kernel and vDSO do not need to retain it, similar to the .note.gnu.property section. Cc: stable@vger.kernel.org Fixes: b3e5d80d0c48 ("arm64/build: Warn on orphan section placement") Link: https://github.com/llvm/llvm-project/commit/ee99c4d4845db66c4daa23733= 52133f4b237c942 [1] Signed-off-by: Nathan Chancellor --- Changes in v2: - Discard the section instead of adding it to the final artifacts to mirror the .note.gnu.property section handling (Will). - Link to v1: https://lore.kernel.org/r/20250124-arm64-handle-arm-attribute= s-in-linker-script-v1-1-74135b6cf349@kernel.org --- arch/arm64/kernel/vdso/vdso.lds.S | 1 + arch/arm64/kernel/vmlinux.lds.S | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/arm64/kernel/vdso/vdso.lds.S b/arch/arm64/kernel/vdso/vds= o.lds.S index 4ec32e86a8da..8095fef66209 100644 --- a/arch/arm64/kernel/vdso/vdso.lds.S +++ b/arch/arm64/kernel/vdso/vdso.lds.S @@ -80,6 +80,7 @@ SECTIONS *(.data .data.* .gnu.linkonce.d.* .sdata*) *(.bss .sbss .dynbss .dynsbss) *(.eh_frame .eh_frame_hdr) + *(.ARM.attributes) } } =20 diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.ld= s.S index f84c71f04d9e..e73326bd3ff7 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -162,6 +162,7 @@ SECTIONS /DISCARD/ : { *(.interp .dynamic) *(.dynsym .dynstr .hash .gnu.hash) + *(.ARM.attributes) } =20 . =3D KIMAGE_VADDR; --- base-commit: 1dd3393696efba1598aa7692939bba99d0cffae3 change-id: 20250123-arm64-handle-arm-attributes-in-linker-script-82aee25313= ac Best regards, --=20 Nathan Chancellor