[Bug ld/15228] copy relocations against protected symbols should be disallowed

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https://sourceware.org/bugzilla/show_bug.cgi?id=15228

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6cabe1ea460c54c17ac877b2541eccf91d6b4b9c

commit 6cabe1ea460c54c17ac877b2541eccf91d6b4b9c
Author: Alan Modra <address@hidden>
Date:   Fri Dec 12 22:53:46 2014 +1030

    Copy relocations against protected symbols

    Copy relocs are used in a scheme to avoid dynamic text relocations in
    non-PIC executables that refer to variables defined in shared
    libraries.  The idea is to have the linker define any such variable in
    the executable, with a copy reloc copying the initial value, then have
    both the executable and shared library refer to the executable copy.
    If the shared library defines the variable as protected then we have
    two copies of the variable being used.

        PR 15228
        * elflink.c (_bfd_elf_adjust_dynamic_copy): Add "info" param.
        Error on copy relocs against protected symbols.
        (elf_merge_st_other): Set h->protected_def.
        * elf-bfd.h (struct elf_link_hash_entry): Add "protected_def".
        (_bfd_elf_adjust_dynamic_copy): Update prototype.
        * elf-m10300.c (_bfd_mn10300_elf_adjust_dynamic_symbol): Update
        _bfd_elf_adjust_dynamic_copy call.
        * elf32-arm.c (elf32_arm_adjust_dynamic_symbol): Likewise.
        * elf32-cr16.c (_bfd_cr16_elf_adjust_dynamic_symbol): Likewise.
        * elf32-cris.c (elf_cris_adjust_dynamic_symbol): Likewise.
        * elf32-hppa.c (elf32_hppa_adjust_dynamic_symbol): Likewise.
        * elf32-i370.c (i370_elf_adjust_dynamic_symbol): Likewise.
        * elf32-i386.c (elf_i386_adjust_dynamic_symbol): Likewise.
        * elf32-lm32.c (lm32_elf_adjust_dynamic_symbol): Likewise.
        * elf32-m32r.c (m32r_elf_adjust_dynamic_symbol): Likewise.
        * elf32-m68k.c (elf_m68k_adjust_dynamic_symbol): Likewise.
        * elf32-metag.c (elf_metag_adjust_dynamic_symbol): Likewise.
        * elf32-or1k.c (or1k_elf_adjust_dynamic_symbol): Likewise.
        * elf32-ppc.c (ppc_elf_adjust_dynamic_symbol): Likewise.
        * elf32-s390.c (elf_s390_adjust_dynamic_symbol): Likewise.
        * elf32-sh.c (sh_elf_adjust_dynamic_symbol): Likewise.
        * elf32-tic6x.c (elf32_tic6x_adjust_dynamic_symbol): Likewise.
        * elf32-tilepro.c (tilepro_elf_adjust_dynamic_symbol): Likewise.
        * elf32-vax.c (elf_vax_adjust_dynamic_symbol): Likewise.
        * elf64-ppc.c (ppc64_elf_adjust_dynamic_symbol): Likewise.
        * elf64-s390.c (elf_s390_adjust_dynamic_symbol): Likewise.
        * elf64-sh64.c (sh64_elf64_adjust_dynamic_symbol): Likewise.
        * elf64-x86-64.c (elf_x86_64_adjust_dynamic_symbol): Likewise.
        * elfnn-aarch64.c (elfNN_aarch64_adjust_dynamic_symbol): Likewise.
        * elfxx-mips.c (_bfd_mips_elf_adjust_dynamic_symbol): Likewise.
        * elfxx-sparc.c (_bfd_sparc_elf_adjust_dynamic_symbol): Likewise.
        * elfxx-tilegx.c (tilegx_elf_adjust_dynamic_symbol): Likewise.

-----------------------------------------------------------------------

Summary of changes:
 bfd/ChangeLog       |   36 ++++++++++++++++++++++++++++++++++++
 bfd/elf-bfd.h       |    4 +++-
 bfd/elf-m10300.c    |    2 +-
 bfd/elf32-arm.c     |    2 +-
 bfd/elf32-cr16.c    |    2 +-
 bfd/elf32-cris.c    |    2 +-
 bfd/elf32-hppa.c    |    2 +-
 bfd/elf32-i370.c    |    2 +-
 bfd/elf32-i386.c    |    2 +-
 bfd/elf32-lm32.c    |    2 +-
 bfd/elf32-m32r.c    |    2 +-
 bfd/elf32-m68k.c    |    2 +-
 bfd/elf32-metag.c   |    2 +-
 bfd/elf32-or1k.c    |    2 +-
 bfd/elf32-ppc.c     |    2 +-
 bfd/elf32-s390.c    |    2 +-
 bfd/elf32-sh.c      |    2 +-
 bfd/elf32-tic6x.c   |    2 +-
 bfd/elf32-tilepro.c |    2 +-
 bfd/elf32-vax.c     |    2 +-
 bfd/elf64-ppc.c     |    2 +-
 bfd/elf64-s390.c    |    2 +-
 bfd/elf64-sh64.c    |    2 +-
 bfd/elf64-x86-64.c  |    2 +-
 bfd/elflink.c       |   13 ++++++++++++-
 bfd/elfnn-aarch64.c |    2 +-
 bfd/elfxx-mips.c    |    2 +-
 bfd/elfxx-sparc.c   |    2 +-
 bfd/elfxx-tilegx.c  |    2 +-
 29 files changed, 77 insertions(+), 28 deletions(-)

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