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 7F0BC2DE709; Tue, 12 Aug 2025 05:44:54 +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=1754977496; cv=none; b=AQ1AF8sp4SG8mq2l5WkJjMUtBdcqQDVZiPEwAs6KoPx3W4qnovQs0+CeSOJUoXpmaUydASoVqaTyCA2fUZ7uYf+mrfu/j61cYsvxWD2Y2mMNxOdkh5oTKqikfpO2gw9/tr0KTV+Vr6pROiKCdFO7uddCn7F9kWkNS8kBKhGL8nU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754977496; c=relaxed/simple; bh=1IZrubHrqMbaFtOk3hdvCwRPSsl7pLGR/UJMuiLBbOY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Tkvi6ATsH7icNBex++W0P2mwP+vCoOexLrt0xzlM12PUmkHJwxx5cEnYn197sIJ5CB5JfN/xHoKiZ+3rCrsHv0jMAV81U4Rc/SGd4Q9mcIGAzkO/3QNECbUY2/epWYYuXnsA9w5JqN0kA16gKjShasTvaGP51cgyMi0ipeGqLRA= 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=y6kJZp/a; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=NXZQJgvp; 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="y6kJZp/a"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="NXZQJgvp" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1754977480; 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=Mxk1j7bQVP7gkeGhqiBaJTM8Rt+qR7YGqcRddWJjs3Q=; b=y6kJZp/aMepqZyqIpu2Ge7fuGhIrg50IqAa8/kDWQydm7It5QCDOz2yKzkQ3nTVNspTLSa 0Z4k7oD1Q+xCqfzj5lYWkxPTS1MmOTr51kIJLK870+GnX/yGOhUkdCBK3uwWNwW6iPZVQC tgpAkrU7Zb0EAA6ZRz5RBZ6MPFx1SbJhfTBFQA4FevsFC+l/Zzx62GlvL4c5g3ZKDTbJWh 7bvJslx0+0Y9/A2L7wtCdcBkbz4Hhs6lfksVYdjmQ5h4IYF4Bv1fx8akKwgCXeg+i8kq/k X4D8gv59NZLmB7c4EWhKN/Uxh5AX9lhl4fWV3oXKTC2YK9nd/9yxz6HJGp2oAA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1754977480; 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=Mxk1j7bQVP7gkeGhqiBaJTM8Rt+qR7YGqcRddWJjs3Q=; b=NXZQJgvpthSi0X2yy7bk/mKr8cSd4B68z61qxsqtB551PCUPMszU49Btx/qpuXPqLXGzsR LaQJ4RnSqXSXw+DA== Date: Tue, 12 Aug 2025 07:44:33 +0200 Subject: [PATCH v4 20/24] LoongArch: vDSO: Enable the vdsocheck tool Precedence: bulk X-Mailing-List: linux-s390@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-v4-20-61a8b615e5ec@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=3338; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=1IZrubHrqMbaFtOk3hdvCwRPSsl7pLGR/UJMuiLBbOY=; b=LqYg38rSkBwpE7p9p2L9QYuv0JUyTLtER245hHstQoHs7MiLUh2lPURSIZcAihCYxsat6bpQV An04KjctmxQDRVzmaoiEcTtq1AzmJcVR/h2OWecT6+BVOcWz8b8Wtr+ 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/loongarch/vdso/Makefile | 4 ++-- lib/vdso/Kconfig | 1 + lib/vdso/check/vdsocheck.rs | 23 +++++++++++++++++++++++ 3 files changed, 26 insertions(+), 2 deletions(-) diff --git a/arch/loongarch/vdso/Makefile b/arch/loongarch/vdso/Makefile index d8316f993482406c2633b49b1daa475fc415a82c..a9b1934dce7c821df96e636a9833e70f22ee1b31 100644 --- a/arch/loongarch/vdso/Makefile +++ b/arch/loongarch/vdso/Makefile @@ -43,7 +43,7 @@ ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \ # quiet_cmd_vdsold_and_vdso_check = LD $@ - cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check) + cmd_vdsold_and_vdso_check = $(cmd_ld_vdso); $(cmd_vdso_check) quiet_cmd_vdsoas_o_S = AS $@ cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $< @@ -72,7 +72,7 @@ $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi) $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi) -$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE +$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) $(vdsocheck) FORCE $(call if_changed,vdsold_and_vdso_check) $(obj)/vdso.so: OBJCOPYFLAGS := -S diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig index 441ff03e1028f7bde5104bd01941c6a9b006e21f..0fe70b3604f9925ef8c5608bb4cac24d3a28faab 100644 --- a/lib/vdso/Kconfig +++ b/lib/vdso/Kconfig @@ -56,6 +56,7 @@ config HAVE_VDSOCHECK default y if ARM64 default y if PPC default y if RISCV + default y if LOONGARCH 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 d48c9da6f18270afe883d167955f73f061b9c472..93819f668d8a4f623f41403bb09b42c4aec2c8de 100644 --- a/lib/vdso/check/vdsocheck.rs +++ b/lib/vdso/check/vdsocheck.rs @@ -115,6 +115,29 @@ fn allowed_relocations_for_machine(machine: u16) -> Option Some(AllowedRelocations { + ignored_object_file_sections: None, + in_object_file: &[ + bindings::R_LARCH_ADD8, + bindings::R_LARCH_ADD16, + bindings::R_LARCH_ADD24, + bindings::R_LARCH_ADD32, + bindings::R_LARCH_ADD64, + bindings::R_LARCH_SUB8, + bindings::R_LARCH_SUB16, + bindings::R_LARCH_SUB24, + bindings::R_LARCH_SUB32, + bindings::R_LARCH_SUB64, + bindings::R_LARCH_B16, + bindings::R_LARCH_B21, + bindings::R_LARCH_B26, + bindings::R_LARCH_PCALA_HI20, + bindings::R_LARCH_PCALA_LO12, + bindings::R_LARCH_PCALA64_LO20, + bindings::R_LARCH_PCALA64_HI12, + bindings::R_LARCH_32_PCREL, + ], + }), _ => None, } } -- 2.50.1