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=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_IN_DEF_DKIM_WL 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 1E5D0C4363A for ; Fri, 23 Oct 2020 18:05:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B288424654 for ; Fri, 23 Oct 2020 18:05:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="H446iHuF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754260AbgJWSE4 (ORCPT ); Fri, 23 Oct 2020 14:04:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35116 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754255AbgJWSEz (ORCPT ); Fri, 23 Oct 2020 14:04:55 -0400 Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7AB9DC0613CE for ; Fri, 23 Oct 2020 11:04:55 -0700 (PDT) Received: by mail-pg1-x542.google.com with SMTP id n16so1832425pgv.13 for ; Fri, 23 Oct 2020 11:04:55 -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=z2CWJzY4MEDXxaHnxhlpdNlYwFX3Mo9zkPfuZorsI9Y=; b=H446iHuFmhIJ0PjfsWOZIKXkYAAiR/qMysy2kifq9bqj5rLg66KEEyAVqwEd6WbUps sED9acTBSiZNv81RCdLvgIloMgQLDb+aFM5BPO1vDUgmdb53vkLHOMlLeHPYF5J2GI/9 Z+MbNrJoO74axniKTBHA3C1/D9nDIjz1K4lJHHNl2nRfv6LOv+lKtXlKdyYXYoGp5NB+ 7T7nAiEeuvoEbWogVAiqxDBfix5RG4KG371ZC7nDh6hwqBoQCAIdn40mLA4qNCiMwGEZ AovbwwbjEYw2V+/jU9UAf4YaXaxsLPa2O+0f0DuRvcHS0eEwto36FosnHGYs9K20Iwe3 qTlA== 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=z2CWJzY4MEDXxaHnxhlpdNlYwFX3Mo9zkPfuZorsI9Y=; b=f/1Mr4/LtEpKahSpOwopITDapO530pgd4yJlJIXPAHQRKqu0kK4kROZvG4w1Eh6T5N 4SMuyUfmZED/X+Ee6TSNONwph5q2Uxg0Ywyjo6S15qk6ZyDJpo/7gAf8p/2Wzc+sOfV8 +Vwz3yp1WF08JMbU+foamRgZkdJ2GwW0x/WdlShZlTggnGTQ6SrqzHrcIa/yxTRpCT3Z 1u2qaVOaN7GOWit7FCe0qvxnOc6COPRiFNw0x+VRDcRM8/BIqbhBaKvpuS12u1OCETXY cOAUzuwRdrvU+eHTR/+XDD3fM5pZZ9dzN3zNAO68oqY20w/YcLpnOAzFcXc6wzJVae+8 24AA== X-Gm-Message-State: AOAM53003rSISwKlXXSjsxXV5vLJYzjuNv6hN3ci9YlvNoDlww7v6Zh0 XxJQ9bBieOSa9RHUt6DC8AsqihQtBKIajO5u6jms9w== X-Google-Smtp-Source: ABdhPJwlSbFR06Dbf2v2Zs9Rk9xNmHPrLyORGSrOkf63VY1RitmJdrnqA+NYcyLnEJ0BT0Cjn2BIz92MfzdbNr+EW3s= X-Received: by 2002:a63:70d:: with SMTP id 13mr3178657pgh.263.1603476294852; Fri, 23 Oct 2020 11:04:54 -0700 (PDT) MIME-Version: 1.0 References: <20201015102216.GB2611@hirez.programming.kicks-ass.net> <20201015203942.f3kwcohcwwa6lagd@treble> <20201020185217.ilg6w5l7ujau2246@treble> <20201021085606.GZ2628@hirez.programming.kicks-ass.net> <20201021093213.GV2651@hirez.programming.kicks-ass.net> <20201021212747.ofk74lugt4hhjdzg@treble> <20201022072553.GN2628@hirez.programming.kicks-ass.net> <20201023174822.GA2696347@google.com> In-Reply-To: <20201023174822.GA2696347@google.com> From: Nick Desaulniers Date: Fri, 23 Oct 2020 11:04:43 -0700 Message-ID: Subject: Re: [PATCH v6 22/25] x86/asm: annotate indirect jumps To: Sami Tolvanen Cc: Peter Zijlstra , Josh Poimboeuf , Jann Horn , "the arch/x86 maintainers" , Masahiro Yamada , Steven Rostedt , Will Deacon , Greg Kroah-Hartman , "Paul E. McKenney" , Kees Cook , clang-built-linux , Kernel Hardening , linux-arch , Linux ARM , linux-kbuild , kernel list , linux-pci@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org On Fri, Oct 23, 2020 at 10:48 AM Sami Tolvanen wrote: > > On Thu, Oct 22, 2020 at 09:25:53AM +0200, Peter Zijlstra wrote: > > > There's a new linker flag for renaming duplicates: > > > > > > https://sourceware.org/bugzilla/show_bug.cgi?id=26391 > > > > > > But I guess that doesn't help us now. > > > > Well, depends a bit if clang can do it; we only need this for LTO builds > > for now. > > LLD doesn't seem to support -z unique-symbol. https://github.com/ClangBuiltLinux/linux/issues/1184 -- Thanks, ~Nick Desaulniers