From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <glibc-bugs-return-19433-listarch-glibc-bugs=sources.redhat.com@sourceware.org>
Received: (qmail 6602 invoked by alias); 29 Aug 2013 03:46:52 -0000
Mailing-List: contact glibc-bugs-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <glibc-bugs.sourceware.org>
List-Subscribe: <mailto:glibc-bugs-subscribe@sourceware.org>
List-Post: <mailto:glibc-bugs@sourceware.org>
List-Help: <mailto:glibc-bugs-help@sourceware.org>, <http://sourceware.org/lists.html#faqs>
Sender: glibc-bugs-owner@sourceware.org
Received: (qmail 6560 invoked by uid 48); 29 Aug 2013 03:46:49 -0000
From: "carlos at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/15905] New: [ARM] IFUNC support broken for REL relocs.
Date: Thu, 29 Aug 2013 03:46:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: libc
X-Bugzilla-Version: 2.18
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: carlos at redhat dot com
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter cc
Message-ID: <bug-15905-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2013-08/txt/msg00178.txt.bz2

http://sourceware.org/bugzilla/show_bug.cgi?id=15905

            Bug ID: 15905
           Summary: [ARM] IFUNC support broken for REL relocs.
           Product: glibc
           Version: 2.18
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: carlos at redhat dot com
                CC: drepper.fsp at gmail dot com

On ARM in dl-machine.h (elf_machine_rel) when handling R_ARM_IRELATIVE
relocations for STT_GNU_IFUNC we fail to pass dl_hwcap to the IFUNC resolver
resulting in the wrong function being selected for the current hardware.

When building glibc with multi-arch support and the VFP ABI this will cause the
NEON variants of functions to be selected even though NEON hardware might not
be present.

On hardware without NEON support the built glibc will fail to run correctly.
This is immediately obvious as most of the testsuite will fail with SIGILL on
this hardware.

-- 
You are receiving this mail because:
You are on the CC list for the bug.