[Bug libc/15905] [ARM] IFUNC support broken for REL relocs.

[Bug libc/15905] [ARM] IFUNC support broken for REL relocs.

[carlos at redhat dot com]

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

Carlos O'Donell <carlos at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at sourceware dot org   |carlos at redhat dot com

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[Bug libc/15905] New: [ARM] IFUNC support broken for REL relocs.

[carlos at redhat dot com]

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.

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[Bug libc/15905] [ARM] IFUNC support broken for REL relocs.

[carlos at redhat dot com]

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

--- Comment #1 from Carlos O'Donell <carlos at redhat dot com> ---
Posted patch:
http://sourceware.org/ml/libc-ports/2013-08/msg00053.html

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[Bug libc/15905] [ARM] IFUNC support broken for REL relocs.

[carlos at redhat dot com]

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

Carlos O'Donell <carlos at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Carlos O'Donell <carlos at redhat dot com> ---
commit d0721e703d222c01a9e8c329311c4fb01dac6972
Author: Carlos O'Donell <carlos@redhat.com>
Date:   Thu Aug 29 00:17:33 2013 -0400

    ARM: Pass dl_hwcap to IFUNC resolver.

    For REL relocs pass dl_hwcap to the IFUNC resolver
    as is required by the IFUNC API (bug 15905).

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[Bug libc/15905] [ARM] IFUNC support broken for REL relocs.

[fweimer at redhat dot com]

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

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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