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=-3.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 22117C433E7 for ; Thu, 15 Oct 2020 00:14:44 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BA068221FF for ; Thu, 15 Oct 2020 00:14:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="yBeTCds4"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="PgKjpNgr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA068221FF Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:To:Subject:Message-ID:Date:From:In-Reply-To: References:MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=wTMGpok+cgQLvIKeMGkvGBu/qWXg37sQt41MYRBg8fg=; b=yBeTCds4s91KIbCd+uPuXqa3e 26WVMLCWzDGNZ2uO6NpPIIfvqMLO8xPyb5Jsy6SxvY4M7/Q4wH7rZMB2eEE+EDtgGbpzvWwF8hLAk OH+Z5pbHqvyP7Oynec6/YLMa0oKFa7B9xuEJc7GpVPlO7xLE56XAk8KxEkpYjPISIHoLTxOFBt7Sd 2y9PX1I2s/yfDV06uniDqX00yguSPCg1RG6EwBdBUFbW/+6gUn5HlfwkA0DSS0+xQGJbTVtAcJJOs ZjKzE1KXX3a3dbqvfBBfZ+dBoSpApCI7bGg977+YosqJsFo1CttMLOhMRZlCbaSdqQOF45oERl3mn 51LK1GLug==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kSqtU-0001WO-QS; Thu, 15 Oct 2020 00:13:20 +0000 Received: from mail-lf1-x142.google.com ([2a00:1450:4864:20::142]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kSqtR-0001VG-3b for linux-arm-kernel@lists.infradead.org; Thu, 15 Oct 2020 00:13:18 +0000 Received: by mail-lf1-x142.google.com with SMTP id a9so1457970lfc.7 for ; Wed, 14 Oct 2020 17:13:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=LURiEnBAw2K4z9zIAiaFYTyrr5u9bQTopZRlsHwZQ30=; b=PgKjpNgrHeicAl8QzyJWoTs5A6rmp6R8Pmum8VjneOxNanE02C3iR0xMHPEKXRSwiA hgbPuEmU4Y/KvHEeIBgVzlegtYfQL/e1IYCy/LveXiVHXjGwp6JSkRsgM1KwAIfKJcKw xjiOyeSTmvlceona3bncz+d4u8W6hA+58+IV74pozmLNmVEOzj6zHtFH6BbvMPGb1Q1N SCAyW7rDspMISGiSvIfRrqTnMCItj6RGBKiMdjZQs84SXB/tH/0v/+6ZNBKtXVi4giBx 5O+k8MWQSqRdXTBoaXJdV4Sbx9ykfhv8CIwDyMJZ5tK/7VE1ZpxXSBqDafewuTLQ+EfB Zbrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=LURiEnBAw2K4z9zIAiaFYTyrr5u9bQTopZRlsHwZQ30=; b=P3vATBz8K/ukmEYpOvsz8QNjJ5hcxkOnpsqZI3feFcrJOs4B6qfBrUcin0x22RvhMZ g47/gnMc/+sKZ7sv91QIXsTwYi9pY5nvN7zRQ7fEbyius4oFRnzt96uosNE+oECvTVmE qSmyQpIwIwNr+0OKDfC9UWdpjd16pl3z4FnTqmFTkzAnKaA/lOVpveIFFKKLY8jJ+1fN wAYiPIloUz0W9CLqVdzkEn9Fl8nONGw3KvpMVQLhnFED17fX8OzuS2rQnhgBldf4ACD3 fC3G5djjpCZOKRrZqUvnhpeWf2G+CqXjuWxDxWl+wOvASZoKSssyg3dwMUoSlLw1jw4j onNQ== X-Gm-Message-State: AOAM532KZTTpMqlYd/irsR8iTEjByCK+4Pl1V1Lx0wXQhERDENy8hd3o zP8SUIqS+hRUeO9E2hHs4kUd2yZV8yKNw1X9+zwM2A== X-Google-Smtp-Source: ABdhPJzXFIHFpKtLKeaohPSTTFSTn1moPmFA2URXdVrEpwDK24AygeIW08WWsjsl1A8u32KKXSdaLbgxjj+v3FNFXjU= X-Received: by 2002:a05:6512:52f:: with SMTP id o15mr141586lfc.381.1602720794371; Wed, 14 Oct 2020 17:13:14 -0700 (PDT) MIME-Version: 1.0 References: <20201013003203.4168817-1-samitolvanen@google.com> <20201013003203.4168817-17-samitolvanen@google.com> In-Reply-To: <20201013003203.4168817-17-samitolvanen@google.com> From: Jann Horn Date: Thu, 15 Oct 2020 02:12:47 +0200 Message-ID: Subject: Re: [PATCH v6 16/25] init: lto: fix PREL32 relocations To: Sami Tolvanen X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201014_201317_233238_A856832E X-CRM114-Status: GOOD ( 15.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch , the arch/x86 maintainers , Kees Cook , "Paul E. McKenney" , Kernel Hardening , Peter Zijlstra , Greg Kroah-Hartman , Masahiro Yamada , linux-kbuild@vger.kernel.org, Nick Desaulniers , kernel list , Steven Rostedt , clang-built-linux , linux-pci@vger.kernel.org, Will Deacon , Linux ARM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Oct 13, 2020 at 2:34 AM Sami Tolvanen wrote: > With LTO, the compiler can rename static functions to avoid global > naming collisions. As initcall functions are typically static, > renaming can break references to them in inline assembly. This > change adds a global stub with a stable name for each initcall to > fix the issue when PREL32 relocations are used. While I understand that this may be necessary for now, are there any plans to fix this in the compiler in the future? There was a thread about this issue at , and possible solutions were discussed there, but it looks like that fizzled out... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel