From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C3B313B635B; Wed, 1 Jul 2026 21:24:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782941074; cv=none; b=UOXBNgKcuAGxOwKaoabArElQAuELjq3BDOhnzuSKCtzoPhuRY+PYMhpHmlb1eyrsnWxqkYYQHEqTqbxwG/BN94qjEp1O/3qrKm3w+j8PeidRoKh+YkaeHqGCOWajG8aM8d5MAPDQKMxws7bshNZ8lfJJJtojv7IJ/yY08TAL6AM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782941074; c=relaxed/simple; bh=m8ripGyiE37MyMaja2sSYbzInMCUq9VMHD8hMKTIxns=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=doGC+yGFa5yd+ZHZSPyBgHke8+10yHXKNDx1TurOrBvJ1dfphrVubTV/19Xc/vza3frGZBiPAxA1Ox4eS9QPiyw6Rdt2+WNLaS9eyNTp1TzP4tWcuKrPQFCD4ECx7OSTJUCeTN7dcRTTqUvmLTjdNRJ4ltziYMQY0oKek6JOj0g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YWfXviz+; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YWfXviz+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5F8A1F000E9; Wed, 1 Jul 2026 21:24:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782941070; bh=GwWQmzYjQdM3SVlSIcY+d2H7VNHT4JMX0xuI/U6wIOs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YWfXviz+HCivxfTHB4c03kpN+ZmhDPe3BsHPYZJaCTJcRAAcoYLkiddoonuHDAqNj sM7G6M8pNbQIlOWNSdBZJT7M0zcsgcNveU/FwI1z1d9tQvTKGJDqKDCyfUQWu7l60W PdYJvyfvxnR1XmvjPwg7xy3lDyK6Rlh9IJ+CWuwD9bQ/IFU6gka7hcD739pV5/SIZY UUmLy4P8wtYUguVcJkEiRCzB1sUtw+Z4yMSoMl6BWEaLcX+38K21QnxccazyNO00x0 y2fwJS3/1lRVx6ZnDAt0I8h72BKY9/fUnKoZwnB2OgN2GPmlhFAJX3auUhVskRMcau ZpZk4sF9DShog== From: Arnd Bergmann To: linux-arm-kernel@lists.infradead.org, soc@lists.linux.dev Cc: linux-kernel@vger.kernel.org, Arnd Bergmann , Aaro Koskinen , Alexander Sverdlin , Alexandre Belloni , Alexandre Torgue , Andrew Lunn , Ard Biesheuvel , Claudiu Beznea , Daniel Mack , Ethan Nelson-Moore , Frank Li , Gregory Clement , Haojian Zhuang , "Jeremy J. Peper" , Kristoffer Ericson , Krzysztof Kozlowski , Linus Walleij , Mark Brown , Marc Zyngier , Mike Rapoport , Nicolas Ferre , Patrice Chotard , Ralph Siemsen , Robert Jarzmik , Russell King , Sascha Hauer , Sebastian Hesselbarth , Stefan Agner , Stefan Wiehler , Tony Lindgren , Vladimir Zapolskiy , Will Deacon , Linus Walleij Subject: [PATCH v2 02/19] ARM: limit OABI support to StrongARM CPUs Date: Wed, 1 Jul 2026 23:23:36 +0200 Message-Id: <20260701212353.2196041-3-arnd@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260701212353.2196041-1-arnd@kernel.org> References: <20260701212353.2196041-1-arnd@kernel.org> Precedence: bulk X-Mailing-List: soc@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Arnd Bergmann As discussed on the mailing lists, there is no way to build OABI userspace binaries any more since gcc-4.8, and now support is also getting dropped in binutils, which will make it impossible to build pure OABI kernels at some point in the future. I found no evidence of anyone still sing OABI userspace on embedded systems that keep getting kernel updates, but there are a few desktop-class machines that date back to the 1990s using Intel StrongARM processors that were supported by old versions of Debian, Red Hat or the official Corel Netwinder distribution. Add a much stricter Kconfig dependency for both native OABI and OABI_COMPAT enabled kernels, only allowing either of them to be selected when building a kernel that targets a StrongARM based machine. Link: https://lore.kernel.org/lkml/2831c5a6-cfbf-4fe0-b51c-0396e5b0aeb7@app.fastmail.com/ Acked-by: Linus Walleij Signed-off-by: Arnd Bergmann --- arch/arm/Kconfig | 14 +++++++------- arch/arm/configs/am200epdkit_defconfig | 1 - arch/arm/configs/axm55xx_defconfig | 1 - arch/arm/configs/footbridge_defconfig | 2 +- arch/arm/configs/neponset_defconfig | 2 +- arch/arm/configs/versatile_defconfig | 1 - 6 files changed, 9 insertions(+), 12 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index ccc0114d30de..3b2316dc9d13 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1151,8 +1151,7 @@ config ARM_PATCH_IDIV code to do integer division. config AEABI - bool "Use the ARM EABI to compile the kernel" if !CPU_V7 && \ - !CPU_V7M && !CPU_V6 && !CPU_V6K && !CC_IS_CLANG + bool "Use the ARM EABI to compile the kernel" if CPU_SA110 || CPU_SA1100 default y help The Arm EABI is the default ABI on all modern Linux @@ -1162,9 +1161,13 @@ config AEABI Everyone should enable this, as support for OABI user space was dropped in gcc-4.8 and most distributions after ca. 2013. + Support for OABI mode will be removed from the kernel + once Intel StrongARM CPUs are phased out. + config OABI_COMPAT bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" depends on AEABI && !THUMB2_KERNEL + depends on CPU_SA110 || CPU_SA1100 help This option preserves the old syscall interface along with the new (ARM EABI) one. It also provides a compatibility layer to @@ -1177,11 +1180,8 @@ config OABI_COMPAT selected, since there is no way yet to sensibly distinguish between calling conventions during filtering. - If you know you'll be using only pure EABI user space then you - can say N here. If this option is not selected and you attempt - to execute a legacy ABI binary then the result will be - UNPREDICTABLE (in fact it can be predicted that it won't work - at all). If in doubt say N. + Support for OABI_COMPAT will be removed from the kernel + once Intel StrongARM CPUs are phased out. config ARCH_SELECT_MEMORY_MODEL def_bool y diff --git a/arch/arm/configs/am200epdkit_defconfig b/arch/arm/configs/am200epdkit_defconfig index b3f81237c6e1..d4745b0f3dcb 100644 --- a/arch/arm/configs/am200epdkit_defconfig +++ b/arch/arm/configs/am200epdkit_defconfig @@ -7,7 +7,6 @@ CONFIG_EXPERT=y # CONFIG_ARCH_MULTI_V7 is not set CONFIG_ARCH_PXA=y CONFIG_ARCH_GUMSTIX=y -# CONFIG_OABI_COMPAT is not set CONFIG_CMDLINE="console=ttyS0,115200n8 root=1f01 rootfstype=jffs2" CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y diff --git a/arch/arm/configs/axm55xx_defconfig b/arch/arm/configs/axm55xx_defconfig index 12c59a4ee504..541e38e2205b 100644 --- a/arch/arm/configs/axm55xx_defconfig +++ b/arch/arm/configs/axm55xx_defconfig @@ -38,7 +38,6 @@ CONFIG_PCIE_AXXIA=y CONFIG_SMP=y CONFIG_NR_CPUS=16 CONFIG_HOTPLUG_CPU=y -CONFIG_OABI_COMPAT=y CONFIG_HIGHMEM=y CONFIG_ARM_APPENDED_DTB=y CONFIG_ARM_ATAG_DTB_COMPAT=y diff --git a/arch/arm/configs/footbridge_defconfig b/arch/arm/configs/footbridge_defconfig index 589b7b1df8c6..e8bf9847d35d 100644 --- a/arch/arm/configs/footbridge_defconfig +++ b/arch/arm/configs/footbridge_defconfig @@ -9,9 +9,9 @@ CONFIG_ARCH_MULTI_V4=y CONFIG_ARCH_FOOTBRIDGE=y CONFIG_ARCH_EBSA285_HOST=y CONFIG_ARCH_NETWINDER=y +# CONFIG_AEABI is not set CONFIG_FPE_NWFPE=y CONFIG_FPE_NWFPE_XP=y -# CONFIG_AEABI is not set CONFIG_MODULES=y CONFIG_PARTITION_ADVANCED=y CONFIG_ACORN_PARTITION=y diff --git a/arch/arm/configs/neponset_defconfig b/arch/arm/configs/neponset_defconfig index c3010a4d93a8..16f0afd770c1 100644 --- a/arch/arm/configs/neponset_defconfig +++ b/arch/arm/configs/neponset_defconfig @@ -6,12 +6,12 @@ CONFIG_ARCH_MULTI_V4=y CONFIG_ARCH_SA1100=y CONFIG_SA1100_ASSABET=y CONFIG_ASSABET_NEPONSET=y +# CONFIG_AEABI is not set CONFIG_ZBOOT_ROM_TEXT=0x80000 CONFIG_ZBOOT_ROM_BSS=0xc1000000 CONFIG_ZBOOT_ROM=y CONFIG_CMDLINE="console=ttySA0,38400n8 cpufreq=221200 rw root=/dev/mtdblock2 mtdparts=sa1100:512K(boot),1M(kernel),2560K(initrd),4M(root) mem=32M noinitrd initrd=0xc0800000,3M" CONFIG_FPE_NWFPE=y -# CONFIG_AEABI is not set CONFIG_PM=y CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y diff --git a/arch/arm/configs/versatile_defconfig b/arch/arm/configs/versatile_defconfig index 8e89debb5a5b..bb9eb9ccbbde 100644 --- a/arch/arm/configs/versatile_defconfig +++ b/arch/arm/configs/versatile_defconfig @@ -6,7 +6,6 @@ CONFIG_LOG_BUF_SHIFT=14 CONFIG_BLK_DEV_INITRD=y # CONFIG_ARCH_MULTI_V7 is not set CONFIG_ARCH_VERSATILE=y -CONFIG_OABI_COMPAT=y CONFIG_CMDLINE="root=1f03 mem=32M" CONFIG_FPE_NWFPE=y CONFIG_VFP=y -- 2.39.5