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=-14.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 2FF0BC432C0 for ; Tue, 26 Nov 2019 14:46:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 04B3E20656 for ; Tue, 26 Nov 2019 14:46:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="b2TOTmIs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728031AbfKZOqq (ORCPT ); Tue, 26 Nov 2019 09:46:46 -0500 Received: from mail-wr1-f65.google.com ([209.85.221.65]:37551 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726049AbfKZOqq (ORCPT ); Tue, 26 Nov 2019 09:46:46 -0500 Received: by mail-wr1-f65.google.com with SMTP id g7so2086075wrw.4 for ; Tue, 26 Nov 2019 06:46:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Z4d670MtFAZBRVHDDr7y0hwhh3jdjrRCwzJNRcQEIpE=; b=b2TOTmIssjHAdfu33yethPu4DPKpr4YhsGK0jiWYpI4rByPGN6vKrELD6l/eWkO5Pj JwsxE59R4krfQTwhLW/J2sVsJvp0r616lQcwOq/fprrfZMYtnFFUpWcLQdCEX/ehF8wO VULG/somi6ZYO+lGfnZgzyHswOwE1dgdrO67woKr/PF/4CXPGntHp6PDq+Ao0yoeDW43 Q/UvWkHMNQ2A9sLohyiUJZTaFjfA7V1NyMYDRy0O209j42zNyjU9icdjwiD8ShXQJUZ+ ss9v9JtpHF6BP598vF/Oe/BxVVBihnbjK33XmDbS9QQp/F/ZgepjPbrv1MB2nCvpSVZy UONg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Z4d670MtFAZBRVHDDr7y0hwhh3jdjrRCwzJNRcQEIpE=; b=B4Bv9eLG81iyirk5zHV4/+WfmH7EPSB6oBZFTH5k+buErmkzZQtF6lAs2cwcFIR8Q6 TSPHJBJd94NYeGtkSIz55rXq2UjzcrfR8zgDSnNKyPhpXgvZRm6b9Yihl3hnnTPkFF0K KM7HFSCJu2e7uK+wV3RHWkLRBNeCSm35e2uDmphVBw3yAVY3xbInZ3yXL0T2JyyxOJAI 9Qc0YHm2ZB5BjeZsGEmxdzT0WznsM8NyWEAxorWOLX3vfkRZNbcxSLiSYcSXr2bpe1cE 5GWdB3J/ZQom8FQC1bBcAwRkmtS56aQ6BG8c2rjnBrx9ZtFQLJl5pD4dy86OH/11MtN+ GqjQ== X-Gm-Message-State: APjAAAU27YEriN0yZFLQ3pkz7zy5uG4BLvg54Sc3iRIviWKqqGW5a0uX CZdJfO8ThZKSCMndAxlWVlM8x3THDfk= X-Google-Smtp-Source: APXvYqz7zA8LG92MJSyDd2eRIISQ4Qcp/e84JCJxgZqxCKET9zDZXwoc5lrMqJeg6GKWYIPxTIWQKw== X-Received: by 2002:a05:6000:12:: with SMTP id h18mr14314290wrx.87.1574779604252; Tue, 26 Nov 2019 06:46:44 -0800 (PST) Received: from localhost.localdomain ([2a02:a58:8166:7500:6c1e:69e9:a832:6384]) by smtp.gmail.com with ESMTPSA id s82sm3325380wms.28.2019.11.26.06.46.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Nov 2019 06:46:43 -0800 (PST) From: Ilie Halip To: linux-kernel@vger.kernel.org Cc: Nick Desaulniers , Andy , Ilie Halip , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , x86@kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH v3] x86/boot: discard .eh_frame sections Date: Tue, 26 Nov 2019 16:45:44 +0200 Message-Id: <20191126144545.19354-1-ilie.halip@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191118175223.GM6363@zn.tnic> References: <20191118175223.GM6363@zn.tnic> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When using GCC as compiler and LLVM's lld as linker, linking setup.elf fails: LD arch/x86/boot/setup.elf ld.lld: error: init sections too big! This happens because GCC generates .eh_frame sections for most of the files in that directory, then ld.lld places the merged section before __end_init, triggering an assert in the linker script. Fix this by discarding the .eh_frame sections, as suggested by Boris. The kernel proper linker script discards them too. Signed-off-by: Ilie Halip Link: https://lore.kernel.org/lkml/20191118175223.GM6363@zn.tnic/ Link: https://github.com/ClangBuiltLinux/linux/issues/760 Suggested-by: Borislav Petkov --- Changes in V3: * discard .eh_frame instead of placing it after .rodata Changes in V2: * removed wildcard for input sections (.eh_frame* -> .eh_frame) arch/x86/boot/setup.ld | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/x86/boot/setup.ld b/arch/x86/boot/setup.ld index 0149e41d42c2..3da1c37c6dd5 100644 --- a/arch/x86/boot/setup.ld +++ b/arch/x86/boot/setup.ld @@ -51,7 +51,10 @@ SECTIONS . = ALIGN(16); _end = .; - /DISCARD/ : { *(.note*) } + /DISCARD/ : { + *(.eh_frame) + *(.note*) + } /* * The ASSERT() sink to . is intentional, for binutils 2.14 compatibility: -- 2.17.1