PATCH: Move some STT_GNU_IFUNC support to generic ELF linker

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Sun, Jun 14, 2009 at 5:54 PM, H.J. Lu<hongjiu.lu@intel.com> wrote:
> Hi,
>
> STT_GNU_IFUNC has been implemented in i386 and x86-64 ELF backends.
> Most of non-relocation STT_GNU_IFUNC codes are very similar. It is
> possible to move most STT_GNU_IFUNC support to generic ELF linker
> so that they can be reused by other backends. ?Here is the first
> step toward that goal. ?Is this a good idea? ?If we want this, I'd
> like to get pre-approval for this change since I will need to update
> generic ELF linker. I can put all generic STT_GNU_IFUNC codes into a
> separate elf-ifunc.c if it helps.
>
> BTW, I will only add a few field to elf_link_hash_table and I have no
> plan to increase the size of struct elf_link_hash_entry.
>
> Thanks.
>
> H.J.
> ----

Hi,

Here is the first patch.  OK for trunk?

Thanks.


H.J.
----
2009-06-15  H.J. Lu  <hongjiu.lu@intel.com>

	* configure.in (elf): Add elf-ifunc.lo.

	* configure: Regenerated.
	* Makefile.in: Likewise.

	* elf-bfd.h (elf_link_hash_table): Add sgot, sgotplt,
	srelgot, splt, srelplt, igotplt, iplt, irelplt and irelifunc.

	* elf32-i386.c (elf_i386_link_hash_table): Remove sgot,
	sgotplt, srelgot, splt, srelplt, igotplt, iplt, irelplt and
	irelifunc.
	(elf_i386_link_hash_table_create): Likewise.
	(elf_i386_create_dynamic_sections): Likewise.
	(elf_i386_check_relocs): Likewise.
	(elf_i386_allocate_dynrelocs): Likewise.
	(elf_i386_size_dynamic_sections): Likewise.
	(elf_i386_relocate_section): Likewise.
	(elf_i386_finish_dynamic_symbol): Likewise.
	(elf_i386_finish_dynamic_sections): Likewise.
	(elf_i386_create_got_section): Removed.

	* elf64-x86-64.c (elf64_x86_64_link_hash_table): Remove sgot,
	sgotplt, srelgot, splt, srelplt, igotplt, iplt, irelplt and
	irelifunc.
	(elf64_x86_64_compute_jump_table_size): Updated.
	(elf64_x86_64_link_hash_table_create): Likewise.
	(elf64_x86_64_create_dynamic_sections): Likewise.
	(elf64_x86_64_check_relocs): Likewise.
	(elf64_x86_64_allocate_dynrelocs): Likewise.
	(elf64_x86_64_size_dynamic_sections): Likewise.
	(elf64_x86_64_relocate_section): Likewise.
	(elf64_x86_64_finish_dynamic_symbol): Likewise.
	(elf64_x86_64_finish_dynamic_sections): Likewise.
	(elf64_x86_64_create_got_section): Removed.

	* elflink.c (_bfd_elf_create_got_section): Use log_file_align
	for pointer alignment.  Set up section pointers.
	(_bfd_elf_create_dynamic_sections): Likewise.
	(_bfd_elf_create_ifunc_sections): Moved to ...
	* elf-ifunc.c: Here.  New.

	* Makefile.am (BFD32_BACKENDS): Add elf-ifunc.lo.
	(BFD32_BACKENDS_CFILES): Add elf-ifunc.c.
	Run "make dep-am".

Attachment: bfd-ifunc-1.patch
Description: Text document