From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <hjl.tools@gmail.com>
Received: from mail-lf1-x144.google.com (mail-lf1-x144.google.com
 [IPv6:2a00:1450:4864:20::144])
 by sourceware.org (Postfix) with ESMTPS id E89DE388A01B
 for <binutils@sourceware.org>; Thu,  2 Apr 2020 14:11:31 +0000 (GMT)
DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org E89DE388A01B
Received: by mail-lf1-x144.google.com with SMTP id c5so2854117lfp.5
 for <binutils@sourceware.org>; Thu, 02 Apr 2020 07:11:31 -0700 (PDT)
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=3xr/9NoecGiFvqd+zJ39UjuXx+Ws23Ogd/G57BwcSZQ=;
 b=fUeOpw7dSvvMHQwF4n3ZejVn3NrXpAC3C2BXRHFvUBYOdcMjrCSiBIyE6iRa9JBKEe
 FYHIjKobPOnil4swXPXVjqsXFQWWeiDIgaMl3O9q8Kq9z1mhyZn2U0ztMBqy0xV2+qiR
 l1DOljoSB9q5cMKMW8KS5NYl6slVWgmaazMTXb6n2hd6Nr++6RBxkB5KTWPrMjKBrabe
 RqdkDVQrux1Z7wrEW7BMJ/R3gp5DbAZo6hF1E9hIv1cv1dKbQCkE4/jAR4nOkbPutAzb
 wZKU+co7wFGkQ2y6KTeVoR+cA/cRVlC30mKBLyM00fG92rDSgLT6QaZruyBy0NggErmm
 tgVA==
X-Gm-Message-State: AGi0PubuOXQN+O/mUz2b0xdlAMHMf7Vn8jME11R4XEZ7gPC0WZWD2hjA
 VXngpgDhGwX0wYU9Sk56derjvi9XklSiKTMf8sU=
X-Google-Smtp-Source: APiQypKAnGWunzLXZSkmCfN10nEqx6JaYcU8j246kPZyT/IdsYf0viA6qLoAQT4djpcU5UIE7pkebe8T+1mjZdfuQOA=
X-Received: by 2002:ac2:42c5:: with SMTP id n5mr2241539lfl.20.1585836689858;
 Thu, 02 Apr 2020 07:11:29 -0700 (PDT)
MIME-Version: 1.0
References: <20200331044350.808132-1-hjl.tools@gmail.com>
 <20200331061751.qjcv7z5z4rbyu45l@gmail.com>
 <CAMe9rOpXJJLnf1fEAQcWjTC7swtar5ytkCZH=Zv4xu9yfbPEJw@mail.gmail.com>
 <CAMe9rOqBgPZNCRzwt9gBvg9r8z+afB2SkbSBaQdhofyv-QQOWw@mail.gmail.com>
 <CAMe9rOr=LDYqYR4y8C3KMTE0LC+TN6F_R5x5Z4o9PUJqVSbVCA@mail.gmail.com>
 <CAMe9rOoC=5TO4yB4rpGv9Lu18odXZJ0yU=ACBgVfRwPTki_5FA@mail.gmail.com>
 <CAMe9rOqfShis+WPMKJ4KkMU6RF9fDSrcLQFm+GzVUZXEp4rnOA@mail.gmail.com>
 <20200402032454.GD4583@bubble.grove.modra.org>
 <CAMe9rOqr8+mUw3ga-AnV=p3hWBPW-E2JfJ4Ko=s5yiXPXu+v4A@mail.gmail.com>
In-Reply-To: <CAMe9rOqr8+mUw3ga-AnV=p3hWBPW-E2JfJ4Ko=s5yiXPXu+v4A@mail.gmail.com>
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Thu, 2 Apr 2020 07:10:29 -0700
Message-ID: <CAMe9rOq=HyRv2mxwjzyN-O=ZuPZ_gipLVCMZSJzupd-ZSCmZkA@mail.gmail.com>
Subject: Re: V6 [PATCH] x86: Only allow S - A relocations against absolute
 symbol
To: Alan Modra <amodra@gmail.com>
Cc: Binutils <binutils@sourceware.org>
Content-Type: text/plain; charset="UTF-8"
X-Spam-Status: No, score=-8.1 required=5.0 tests=BAYES_00, DKIM_SIGNED,
 DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_1,
 RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS,
 TXREP autolearn=ham autolearn_force=no version=3.4.2
X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on
 server2.sourceware.org
X-BeenThere: binutils@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Binutils mailing list <binutils.sourceware.org>
List-Unsubscribe: <http://sourceware.org/mailman/options/binutils>,
 <mailto:binutils-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/binutils/>
List-Post: <mailto:binutils@sourceware.org>
List-Help: <mailto:binutils-request@sourceware.org?subject=help>
List-Subscribe: <http://sourceware.org/mailman/listinfo/binutils>,
 <mailto:binutils-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Thu, 02 Apr 2020 14:11:35 -0000

On Thu, Apr 2, 2020 at 4:54 AM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> On Wed, Apr 1, 2020 at 8:25 PM Alan Modra <amodra@gmail.com> wrote:
> >
> > Seen here on Ubuntu 18.04 when using a number of different gcc
> > versions.
> >
> > FAIL: Run pr25749-1bb (-no-pie -fno-PIE)
> > FAIL: Run pr25749-1bb (-pie -fPIE)
> > FAIL: Run pr25749-2ab (-no-pie -fno-PIE)
> > FAIL: Run pr25749-2ab (-pie -fPIE)
>
> Ubuntu 18.04 has glibc 2.27 which doesn't have
>
> commit e7feec374c635b6a29d65c39ae5e1855528fed39
> Author: Maciej W. Rozycki <macro@mips.com>
> Date:   Wed Apr 4 23:09:37 2018 +0100
>
>     elf: Correct absolute (SHN_ABS) symbol run-time calculation [BZ #19818]
>
>     Do not relocate absolute symbols by the base address.  Such symbols have
>     SHN_ABS as the section index and their value is not supposed to be
>     affected by relocation as per the ELF gABI[1]:
>
>     "SHN_ABS
>         The symbol has an absolute value that will not change because of
>         relocation."
>
> Glibc 2.28 and above are OK.
>

These tests are OK on Ubuntu 20.04.

-- 
H.J.