From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3DA6AC433DB for ; Thu, 7 Jan 2021 12:34:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF60A23356 for ; Thu, 7 Jan 2021 12:34:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728083AbhAGMe0 (ORCPT ); Thu, 7 Jan 2021 07:34:26 -0500 Received: from mail-40136.protonmail.ch ([185.70.40.136]:14172 "EHLO mail-40136.protonmail.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728091AbhAGMeZ (ORCPT ); Thu, 7 Jan 2021 07:34:25 -0500 Date: Thu, 07 Jan 2021 12:33:38 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=pm.me; s=protonmail; t=1610022823; bh=cGGCdvWu4PwKRz1S12Mzu82QSX0n1m3RhliddwWOBIo=; h=Date:To:From:Cc:Reply-To:Subject:From; b=g46HgMEoNVFPYStTMl2U0tiPPlynTb67J8pWxwlfvVy6Em26mrnGfYXJ/NHnzF9C0 2l0iJxG1l6L2MQmeYZiPk5ENNdy7OPJYqqUNgs8l5ON/RdkT7ZICusXDnJal0o/X3i Tj4cO9W6AOsYzEJ0gxL2+BDdGBbhOUiaYSHhiaYiMvQthW9Prgz9YMLvzYTSsqwFzf Y1JjpqrCobMYSRQ+oCsp1mj+LhXd0yY23z00kpxeH166K/JShx6Ws84LoZP/ZUU6Ty 4BRvaE0wALd41ERV9FeUwIZ0F7w7LKZEhl03kCs89rDDh8rRI5ktvz8h0G0KHnV8m6 XoOQIqhKZCu+Q== To: Thomas Bogendoerfer From: Alexander Lobakin Cc: Arnd Bergmann , Kees Cook , Nathan Chancellor , Nick Desaulniers , Fangrui Song , Huacai Chen , Pei Huang , Jiaxun Yang , Alexander Lobakin , Sami Tolvanen , Ingo Molnar , Ralf Baechle , Corey Minyard , linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, stable@vger.kernel.org, clang-built-linux@googlegroups.com Reply-To: Alexander Lobakin Subject: [PATCH v4 mips-next 0/7] MIPS: vmlinux.lds.S sections fixes & cleanup Message-ID: <20210107123331.354075-1-alobakin@pm.me> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org This series hunts the problems discovered after manual enabling of ARCH_WANT_LD_ORPHAN_WARN. Notably: - adds the missing PAGE_ALIGNED_DATA() section affecting VDSO placement (marked for stable); - properly stops .eh_frame section generation. Compile and runtime tested on MIPS32R2 CPS board with no issues using two different toolkits: - Binutils 2.35.1, GCC 10.2.0; - LLVM stack 11.0.0. Since v3 [2]: - fix the third patch as GNU stack emits .rel.dyn into VDSO for some reason if .cfi_sections is specified. Since v2 [1]: - stop discarding .eh_frame and just prevent it from generating (Kees); - drop redundant sections assertions (Fangrui); - place GOT table in .text instead of asserting as it's not empty when building with LLVM (Nathan); - catch compound literals in generic definitions when building with LD_DEAD_CODE_DATA_ELIMINATION (Kees); - collect two Reviewed-bys (Kees). Since v1 [0]: - catch .got entries too as LLD may produce it (Nathan); - check for unwanted sections to be zero-sized instead of discarding (Fangrui). [0] https://lore.kernel.org/linux-mips/20210104121729.46981-1-alobakin@pm.m= e [1] https://lore.kernel.org/linux-mips/20210106200713.31840-1-alobakin@pm.m= e [2] https://lore.kernel.org/linux-mips/20210107115120.281008-1-alobakin@pm.= me Alexander Lobakin (7): MIPS: vmlinux.lds.S: add missing PAGE_ALIGNED_DATA() section MIPS: vmlinux.lds.S: add ".gnu.attributes" to DISCARDS MIPS: properly stop .eh_frame generation MIPS: vmlinux.lds.S: catch bad .rel.dyn at link time MIPS: vmlinux.lds.S: explicitly declare .got table vmlinux.lds.h: catch compound literals into data and BSS MIPS: select ARCH_WANT_LD_ORPHAN_WARN arch/mips/Kconfig | 1 + arch/mips/include/asm/asm.h | 18 ++++++++++++++++++ arch/mips/kernel/vmlinux.lds.S | 15 ++++++++++++++- include/asm-generic/vmlinux.lds.h | 6 +++--- 4 files changed, 36 insertions(+), 4 deletions(-) --=20 2.30.0