From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-474158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 27651 invoked by alias); 21 Jan 2015 02:45:52 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 25177 invoked by uid 48); 21 Jan 2015 02:45:37 -0000
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64703] glibc sysdeps/powerpc/powerpc64/dl-machine.h miscompile
Date: Wed, 21 Jan 2015 02:45:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields:
Message-ID: <bug-64703-4-rrB6v7o8t4@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-64703-4@http.gcc.gnu.org/bugzilla/>
References: <bug-64703-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-01/txt/msg02152.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64703

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Even though I think there is a bug here.  I think the best way to work around
this issue is do:
unsigned long
resolve_ifunc (unsigned long value,
           const struct link_map *map, const struct link_map *sym_map)
{
  Elf64_FuncDesc opd;

  if (map != sym_map
      && sym_map != dl_rtld_map
      && !sym_map->l_relocated)
    {
      Elf64_FuncDesc *func = (Elf64_FuncDesc *) value;
      opd.fd_func = func->fd_func + sym_map->l_addr;
      opd.fd_toc = func->fd_toc + sym_map->l_addr;
      opd.fd_aux = func->fd_aux;
      value = (unsigned long) &opd;
    }
  asm("":"+r"(value): : "memory");
  return ((unsigned long (*) (unsigned long)) value) (dl_hwcap);
}