[Bug dynamic-link/17711] copy relocations against protected symbols don't work

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17711

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The branch, hjl/pr17711 has been created
        at  b3f3e110aefbb41da9acc553891cdfcd6f2c50f0 (commit)

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b3f3e110aefbb41da9acc553891cdfcd6f2c50f0

commit b3f3e110aefbb41da9acc553891cdfcd6f2c50f0
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Fri Mar 6 04:55:56 2015 -0800

    Replace __attribute__((visibility("protected")))

    With copy relocation, address of protected data defined in the shared
    library may be external.  Compiler shouldn't asssume protected data will
    be local.  But due to

    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65248

    __attribute__((visibility("protected"))) doesn't work correctly, we need
    to use asm (".protected xxx") instead.

        * elf/ifuncdep2.c (global): Replace
        __attribute__((visibility("protected"))) with
        asm (".protected global").
        * elf/ifuncmod1.c (global): Likewise.
        * elf/ifuncmod5.c (global): Likewise.

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=88af4693bd32e3658206b73c121de9a36c510f6b

commit 88af4693bd32e3658206b73c121de9a36c510f6b
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Thu Mar 5 11:36:35 2015 -0800

    Add a testcase for copy reloc against protected data

    Linkers in some versions of binutils 2.25 and 2.26 don't support protected
    data symbol with error messsage like:

    /usr/bin/ld: copy reloc against protected `bar' is invalid
    /usr/bin/ld: failed to set dynamic section sizes: Bad value

    We check if linker supports copy reloc against protected data symbol to
    avoid running the test if linker is broken.

        [BZ #17711]
        * config.make.in (have-protected-data): New.
        * configure.ac: Check linker support for protected data symbol.
        * configure: Regenerated.
        * elf/Makefile (modules-names): Add tst-protected1moda and
        tst-protected1modb if $(have-protected-data) is yes.
        (tests): Add tst-protected1a and tst-protected1b if
        $(have-protected-data) is yes.
        ($(objpfx)tst-protected1a): New.
        ($(objpfx)tst-protected1b): Likewise.
        (tst-protected1modb.so-no-z-defs): Likewise.
        * elf/tst-protected1a.c: New file.
        * elf/tst-protected1b.c: Likewise.
        * elf/tst-protected1mod.h: Likewise.
        * elf/tst-protected1moda.c: Likewise.
        * elf/tst-protected1modb.c: Likewise.

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