From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 06C722E7BD2; Tue, 12 Aug 2025 05:44:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754977492; cv=none; b=aq0SGKDfSwIhB47DWwEAt+zJAb7Yj6ZRrHr1djrblgltUU2CjerTUPJ0T9wLc/GzxNrRzi/AtZ+XcbFvc1RVrYd2IIUyV5NgZiKSCETP9EQ2OhQknrdqM7GpzprGzodPuXx+nJr/eMcze98aZIs82p74YoJaehiTqCGDj/YuJ+g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754977492; c=relaxed/simple; bh=r7UGwjKWy5Zeb3xhIIrMh9pf0ciHc2+w+MWcQSjDNGA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=lhfiJDNyO+5LnGgLr63v3TY7d9W4Ld+S1sQ4D7uoQoDkZz2abotWQ9UYfuhTCFCCkrl7Z7pF4efAbJGnsUcK2N7aJsevudPaqVOj/gXbbvSIMrn4VZhZ4ipVbLocCU+MLUhME3zPUcL2IYrP3x1J7nq6ufw48SQj20l1Xk+BVAc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=F22xZcK2; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=CIvDa3NH; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="F22xZcK2"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="CIvDa3NH" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1754977478; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8J7TMiJJPZpKeE1Ou1BERsW/DWLgHHFhkRd6+bQxh4o=; b=F22xZcK20TXBf5jZYwevz3QDaZU3UZdkYRKPWY6C4m9SOtAW/94DLHjYy+CQODOajcbuP8 MPuKnXuduuI/jhqsirbr4WDRq0UCEwLS9ico7i3W51ZwBK//QX5U/DFAfzE1ZfWMKRv1fo U204HMGXOXouMg9NvdzgNnQ3u5xAm7roz2wc8MIoolSJvm4oYaWLKrkRHYueW7rKS1NB1M M66TWmw08jIG99a4Abb4Ty+uqba/s3TVFyhenXOKgI+lnOHn0VOL47w8Nbea7L7Aa9lbbq qDIyaw6x+h/5wdjGBDsWrXJDjrCbuIbIvo6NedGG2NbzD7A6pnHseaNfqod0Fg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1754977478; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8J7TMiJJPZpKeE1Ou1BERsW/DWLgHHFhkRd6+bQxh4o=; b=CIvDa3NH3jry3aeRacozBMFDrQSzLfZ5hYqcOa0ZRn/0gu5GgdotOJzL+xdQny7o5u5pZT TOIV6QFRAgoN9fCw== Date: Tue, 12 Aug 2025 07:44:29 +0200 Subject: [PATCH v4 16/24] powerpc/vdso: Enable the vdsocheck tool Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20250812-vdso-absolute-reloc-v4-16-61a8b615e5ec@linutronix.de> References: <20250812-vdso-absolute-reloc-v4-0-61a8b615e5ec@linutronix.de> In-Reply-To: <20250812-vdso-absolute-reloc-v4-0-61a8b615e5ec@linutronix.de> To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Andy Lutomirski , Thomas Gleixner , Vincenzo Frascino , Kees Cook , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Richard Weinberger , Anton Ivanov , Johannes Berg , Russell King , Catalin Marinas , Will Deacon , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Huacai Chen , WANG Xuerui , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Bogendoerfer , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Nicolas Schier Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-mm@kvack.org, linux-um@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, linux-s390@vger.kernel.org, linux-mips@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kbuild@vger.kernel.org, Jan Stancek , Arnaldo Carvalho de Melo , Alexandre Ghiti , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Developer-Signature: v=1; a=ed25519-sha256; t=1754977469; l=3422; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=r7UGwjKWy5Zeb3xhIIrMh9pf0ciHc2+w+MWcQSjDNGA=; b=Q0EZvSWT3Q75vpmTxwYRVjiyR2O2xw9tAfm1kD1FblKw0cRCQJd0iAfyLt/+gYR+ZyTVxexIt TIIS6p5vayTD8+ve2mOSceJuJpTEl1kRVjS440cBUU/8+/7OHdQGucC X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= The vdsocheck tool validates the object files and final .so library. It can detect if the compiler created relocations which are incompatible with the vDSO which need to be worked around. Wire it up for the architecture. Signed-off-by: Thomas Weißschuh --- arch/powerpc/kernel/vdso/Makefile | 4 ++-- lib/vdso/Kconfig | 1 + lib/vdso/check/vdsocheck.rs | 25 +++++++++++++++++++++++++ 3 files changed, 28 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/vdso/Makefile b/arch/powerpc/kernel/vdso/Makefile index 8834dfe9d72796c8f1e20b84ebcb33a6b74b82f0..193af6877eba25898aeaf55a04cd834f7a2eb753 100644 --- a/arch/powerpc/kernel/vdso/Makefile +++ b/arch/powerpc/kernel/vdso/Makefile @@ -75,9 +75,9 @@ targets += vdso64.lds CPPFLAGS_vdso64.lds += -P -C # link rule for the .so file, .lds has to be first -$(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday-32.o $(obj)/vgetrandom-32.o $(obj)/crtsavres-32.o FORCE +$(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday-32.o $(obj)/vgetrandom-32.o $(obj)/crtsavres-32.o $(vdsocheck) FORCE $(call if_changed,vdso32ld_and_check) -$(obj)/vdso64.so.dbg: $(obj)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday-64.o $(obj)/vgetrandom-64.o FORCE +$(obj)/vdso64.so.dbg: $(obj)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday-64.o $(obj)/vgetrandom-64.o $(vdsocheck) FORCE $(call if_changed,vdso64ld_and_check) # assembly rules for the .S files diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig index 3037b15476bb60ee47c1e083eae3968ab9604f59..8994419d90e7b5c66ac77449b6c3bd96c968983d 100644 --- a/lib/vdso/Kconfig +++ b/lib/vdso/Kconfig @@ -54,6 +54,7 @@ config HAVE_VDSOCHECK default y if X86 default y if ARM default y if ARM64 + default y if PPC help Selected for architectures that are supported by the 'vdsocheck' progam. Only transitional. diff --git a/lib/vdso/check/vdsocheck.rs b/lib/vdso/check/vdsocheck.rs index a695aed95ad391a0c55e5388bc6d1f1141fd784e..54372a547b1cde05c1a4454b9a21de357b22b0df 100644 --- a/lib/vdso/check/vdsocheck.rs +++ b/lib/vdso/check/vdsocheck.rs @@ -65,6 +65,31 @@ fn allowed_relocations_for_machine(machine: u16) -> Option Some(AllowedRelocations { + ignored_object_file_sections: None, + in_object_file: &[ + bindings::R_PPC_REL24, + bindings::R_PPC_REL14, + bindings::R_PPC_REL32, + bindings::R_PPC_REL16, + bindings::R_PPC_REL16_LO, + bindings::R_PPC_REL16_HI, + bindings::R_PPC_REL16_HA, + ], + }), + bindings::EM_PPC64 => Some(AllowedRelocations { + ignored_object_file_sections: None, + in_object_file: &[ + bindings::R_PPC64_REL24, + bindings::R_PPC64_REL14, + bindings::R_PPC64_REL32, + bindings::R_PPC64_REL64, + bindings::R_PPC64_REL16, + bindings::R_PPC64_REL16_LO, + bindings::R_PPC64_REL16_HI, + bindings::R_PPC64_REL16_HA, + ], + }), _ => None, } } -- 2.50.1