[RFC, PATCH] aarch64: Add support for GNU indirect functions.

[Will Newton]

On 7 June 2013 15:24, Nick Clifton <nick@nickclifton.clara.co.uk> wrote:
> Hi Will,
>
>
>>> bfd/ChangeLog:
>>>
>>> 2013-05-17  Will Newton  <will.newton@linaro.org>
>>>
>>>          * configure.in: Build elf-ifunc.o for AArch64.
>>>          * elf64-aarch64.c: Include objalloc.h.
>>>          (elf64_aarch64_howto_dynrelocs): Add R_AARCH64_IRELATIVE howto.
>>>          (struct elf64_aarch64_link_hash_table): Add members for handling
>>>          R_AARCH64_IRELATIVE relocations.
>>>          (elf_aarch64_local_htab_hash): New function.
>>>          (elf_aarch64_local_htab_eq): New function.
>>>          (elf_aarch64_get_local_sym_hash): New function.
>>>          (elf64_aarch64_link_hash_table_create): Initialize local
>>> STT_GNU_IFUNC
>>>          symbol hash.
>>>          (elf64_aarch64_hash_table_free): Free local STT_GNU_IFUNC symbol
>>> hash.
>>>          (elf64_aarch64_final_link_relocate): Add sym argument.  Add
>>> support
>>>          for handling STT_GNU_IFUNC symbols.
>>>          (elf64_aarch64_gc_sweep_hook): Add support for garbage
>>> collecting
>>>          references to STT_GNU_IFUNC symbols.
>>>          (elf64_aarch64_adjust_dynamic_symbol): Add support for handling
>>>          STT_GNU_IFUNC symbols.
>>>          (elf64_aarch64_check_relocs): Add support for handling
>>> STT_GNU_IFUNC
>>>          symbols.  Ensure we don't increase plt.refcount from -1 to 0.
>>>          (elf64_aarch64_post_process_headers): Call _bfd_elf_set_osabi.
>>>          (elf64_aarch64_is_function_type): Remove function.
>>>          (elf64_aarch64_allocate_dynrelocs): Call
>>>          _bfd_elf_allocate_ifunc_dyn_relocs for STT_GNU_IFUNC symbols.
>>>          (elf_aarch64_allocate_local_dynrelocs): New function.
>>>          (elf64_aarch64_size_dynamic_sections): Call
>>>          elf_aarch64_allocate_local_dynrelocs.  Initialize
>>> next_irelative_index.
>>>          (elf64_aarch64_create_small_pltn_entry): Add info argument.
>>>          Add support for creating .iplt entries for STT_GNU_IFUNC
>>> symbols.
>>>          (elf64_aarch64_finish_dynamic_symbol): Add support for handling
>>>          STT_GNU_IFUNC symbols and .iplt.
>>>          (elf_aarch64_finish_local_dynamic_symbol): New function.
>>>          (elf64_aarch64_finish_dynamic_sections): Call
>>>          elf_aarch64_finish_local_dynamic_symbol.
>>>          (elf64_aarch64_add_symbol_hook): New function.
>>>
>>> include/elf/ChangeLog:
>>>
>>> 2013-05-17  Will Newton  <will.newton@linaro.org>
>>>
>>>          * aarch64.h: Add R_AARCH64_IRELATIVE reloc.
>>>
>>> ld/testsuite/ChangeLog:
>>>
>>> 2013-05-17  Will Newton  <will.newton@linaro.org>
>>>
>>>          * ld-ifunc/ifunc.exp: Enable ifunc tests for AArch64.
>>>          * ld-aarch64/aarch64-elf.exp: Add ifunc tests.
>>>          * ld-aarch64/ifunc-1-local.d: New file.
>>>          * ld-aarch64/ifunc-1-local.s: Likewise.
>>>          * ld-aarch64/ifunc-1.d: Likewise.
>>>          * ld-aarch64/ifunc-1.s: Likewise.
>>>          * ld-aarch64/ifunc-10.d: Likewise.
>>>          * ld-aarch64/ifunc-10.s: Likewise.
>>>          * ld-aarch64/ifunc-11.d: Likewise.
>>>          * ld-aarch64/ifunc-11.s: Likewise.
>>>          * ld-aarch64/ifunc-12.d: Likewise.
>>>          * ld-aarch64/ifunc-12.s: Likewise.
>>>          * ld-aarch64/ifunc-13.d: Likewise.
>>>          * ld-aarch64/ifunc-13a.s: Likewise.
>>>          * ld-aarch64/ifunc-13b.s: Likewise.
>>>          * ld-aarch64/ifunc-14a.d: Likewise.
>>>          * ld-aarch64/ifunc-14a.s: Likewise.
>>>          * ld-aarch64/ifunc-14b.d: Likewise.
>>>          * ld-aarch64/ifunc-14b.s: Likewise.
>>>          * ld-aarch64/ifunc-14c.d: Likewise.
>>>          * ld-aarch64/ifunc-14c.s: Likewise.
>>>          * ld-aarch64/ifunc-14d.d: Likewise.
>>>          * ld-aarch64/ifunc-14e.d: Likewise.
>>>          * ld-aarch64/ifunc-14f.d: Likewise.
>>>          * ld-aarch64/ifunc-15.d: Likewise.
>>>          * ld-aarch64/ifunc-15.s: Likewise.
>>>          * ld-aarch64/ifunc-16.d: Likewise.
>>>          * ld-aarch64/ifunc-16.s: Likewise.
>>>          * ld-aarch64/ifunc-17a.d: Likewise.
>>>          * ld-aarch64/ifunc-17a.s: Likewise.
>>>          * ld-aarch64/ifunc-17b.d: Likewise.
>>>          * ld-aarch64/ifunc-17b.s: Likewise.
>>>          * ld-aarch64/ifunc-18a.d: Likewise.
>>>          * ld-aarch64/ifunc-18a.s: Likewise.
>>>          * ld-aarch64/ifunc-18b.d: Likewise.
>>>          * ld-aarch64/ifunc-18b.s: Likewise.
>>>          * ld-aarch64/ifunc-19a.d: Likewise.
>>>          * ld-aarch64/ifunc-19a.s: Likewise.
>>>          * ld-aarch64/ifunc-19b.d: Likewise.
>>>          * ld-aarch64/ifunc-19b.s: Likewise.
>>>          * ld-aarch64/ifunc-2-local.d: Likewise.
>>>          * ld-aarch64/ifunc-2-local.s: Likewise.
>>>          * ld-aarch64/ifunc-2.d: Likewise.
>>>          * ld-aarch64/ifunc-2.s: Likewise.
>>>          * ld-aarch64/ifunc-20.d: Likewise.
>>>          * ld-aarch64/ifunc-20.s: Likewise.
>>>          * ld-aarch64/ifunc-3.s: Likewise.
>>>          * ld-aarch64/ifunc-3a.d: Likewise.
>>>          * ld-aarch64/ifunc-3b.d: Likewise.
>>>          * ld-aarch64/ifunc-4.d: Likewise.
>>>          * ld-aarch64/ifunc-4.s: Likewise.
>>>          * ld-aarch64/ifunc-4a.d: Likewise.
>>>          * ld-aarch64/ifunc-5-local.s: Likewise.
>>>          * ld-aarch64/ifunc-5.s: Likewise.
>>>          * ld-aarch64/ifunc-5a-local.d: Likewise.
>>>          * ld-aarch64/ifunc-5a.d: Likewise.
>>>          * ld-aarch64/ifunc-5b-local.d: Likewise.
>>>          * ld-aarch64/ifunc-5b.d: Likewise.
>>>          * ld-aarch64/ifunc-5r-local.d: Likewise.
>>>          * ld-aarch64/ifunc-6.s: Likewise.
>>>          * ld-aarch64/ifunc-6a.d: Likewise.
>>>          * ld-aarch64/ifunc-6b.d: Likewise.
>>>          * ld-aarch64/ifunc-7.s: Likewise.
>>>          * ld-aarch64/ifunc-7a.d: Likewise.
>>>          * ld-aarch64/ifunc-7b.d: Likewise.
>>>          * ld-aarch64/ifunc-8.d: Likewise.
>>>          * ld-aarch64/ifunc-8a.s: Likewise.
>>>          * ld-aarch64/ifunc-8b.s: Likewise.
>>>          * ld-aarch64/ifunc-9.d: Likewise.
>>>          * ld-aarch64/ifunc-9.s: Likewise.
>
>
> Approved - please apply.

Thanks, applied.

--
Will Newton
Toolchain Working Group, Linaro