[PATCH][m68k] Support generation of multiple GOTs

[Nick Clifton]

Hi Maxim,


> 2008-03-27  Maxim Kuvyrkov  <maxim@codesourcery.com>
> 	
> 	Multi-GOT support for m68k.
> 	
> 	bfd/
> 
> 	* elf32-m68k.c (struct elf_m68k_link_hash_entry: got_entry_key,
> 	glist): New fields.
> 	(struct elf_m68k_got_entry_key, struct elf_m68k_got_entry,
> 	struct elf_m68k_got, struct elf_m68k_bfd2got_entry,
> 	struct elf_m68k_multi_got): New data structures.
> 	(struct elf_m68k_link_hash_table: local_gp_p, use_neg_got_offsets_p,
> 	allow_multigot_p, multi_got_): New fields.
> 	(elf_m68k_multi_got): New macro.
> 	(elf_m68k_link_hash_newfunc): Initialize new fields of
> 	struct elf_m68k_link_hash_entry.
> 	(elf_m68k_link_hash_table_create): Initialize new fields of
> 	struct elf_m68k_link_hash_table.
> 	(elf_m68k_link_hash_table_free): New static function implementing hook.
> 	(elf_m68k_init_got, elf_m68k_clear_got, elf_m68k_create_empty_got): New
> 	static functions for struct elf_m68k_got.	
> 	(elf_m68k_init_got_entry_key, elf_m68k_got_entry_hash,
> 	elf_m68k_got_entry_eq): New static functions for
> 	struct elf_m68k_got_entry.
> 	(ELF_M68K_REL_8O_MAX_N_ENTRIES_IN_GOT,
> 	ELF_M68K_REL_8O_16O_MAX_N_ENTRIES_IN_GOT): New macros.
> 	(enum elf_m68k_get_entry_howto): New enum.
> 	(elf_m68k_get_got_entry, elf_m68k_update_got_entry_type,
> 	elf_m68k_remove_got_entry_type): New static functions for
> 	struct elf_m68k_got_entry.
> 	(elf_m68k_add_entry_to_got): New static function.
> 	(elf_m68k_bfd2got_entry_hash, elf_m68k_bfd2got_entry_eq,
> 	elf_m68k_bfd2got_entry_del, elf_m68k_get_bfd2got_entry): New static
> 	functions for struct elf_m68k_bfd2got_entry.
> 	(struct elf_m68k_can_merge_gots_arg, elf_m68k_can_merge_gots_1,
> 	elf_m68k_can_merge_gots): New traversal.
> 	(struct elf_m68k_merge_gots_arg, elf_m68k_merge_gots_1,
> 	elf_m68k_merge_gots): Ditto.
> 	(struct elf_m68k_finalize_got_offsets_arg,
> 	elf_m68k_finalize_got_offsets_1, elf_m68k_finalize_got_offsets): Ditto.
> 	(struct elf_m68k_partition_multi_got_arg,
> 	elf_m68k_partition_multi_got_1, elf_m68k_init_symndx2h_1,
> 	elf_m68k_partition_multi_got): Ditto.
> 	(elf_m68k_find_got_entry_ptr, elf_m68k_remove_got_entry): New static
> 	functions.
> 	(elf_m68k_copy_indirect_symbol): New static function implementing
> 	a hook.
> 	(elf_m68k_check_relocs): Update to add entries to multi-GOT.
> 	(elf_m68k_gc_sweep_hook): Update to remove entries from multi-GOT.
> 	(elf_m68k_always_size_sections): Assign BFDs to GOTs.
> 	(elf_m68k_relocate_section): Update to properly handle GOT relocations.
> 	(elf_m68k_finish_dynamic_symbol): Update to traverse all GOT entries
> 	of a global symbol.
> 	(bfd_elf_m68k_set_target_options): New function.
> 	(bfd_elf32_bfd_link_hash_table_free): Define hook.
> 	(bfd_elf32_bfd_final_link): Change expansion to bfd_elf_final_link
> 	to skip generic calculation of GOT offsets.
> 	(elf_backend_copy_indirect_symbol): Define hook.
> 
> 	* bfd-in.h (bfd_elf_m68k_set_target_options): Declare function.
> 	* bfd-in2.h: Regenerate.
> 	
> 	ld/
> 
> 	* configure.in (--enable-got): New option.  Handle it.
> 	* configure: Regenerate.
> 	* config.in: Regenerate.
> 
> 	* emultempl/m68kelf.em: (got_handling_target_default): New shell
> 	variable.
> 	(GOT_HANDLING_TARGET_DEFAULT): New macro.
> 	(GOT_HANDLING_DEFAULT): New macro.  Initialize it from configure
> 	option if one was given.
> 	(got_handling): New static variable.
> 	(elf_m68k_create_output_section_statements): New static function
> 	implementing hook.
> 	(PARSE_AND_LIST_PROLOGUE): Define shell variable.
> 	(OPTION_GOT): New macro.
> 	(PARSE_AND_LIST_LONGOPTS): Define shell variable.  Specify
> 	--got option.
> 	(got): New linker option.
> 	(PARSE_AND_LIST_OPTIONS): Define shell variable.  Print help string
> 	for --got option.
> 	(PARSE_AND_LIST_ARGS_CASES): Define shell variable.  Handle --got
> 	option.
> 	
> 	* ld.texinfo: Document --got=<type> option.
> 	* gen-doc.texi: Add M68K.
> 
> 	ld/testsuite/
> 
> 	* ld-m68k/got-12.s: New file.
> 	* ld-m68k/got-13.s: New file.
> 	* ld-m68k/got-14.s: New file.
> 	* ld-m68k/got-15.s: New file.
> 	* ld-m68k/got-34.s: New file.
> 	* ld-m68k/got-35.s: New file.
> 	* ld-m68k/got-single-12-ok.d: New dump test.
> 	* ld-m68k/got-single-13-er.d: New dump test.
> 	* ld-m68k/got-negative-14-ok.d: New dump test.
> 	* ld-m68k/got-negative-15-er.d: New dump test.
> 	* ld-m68k/got-negative-12-13-14-34-ok.d: New dump test.
> 	* ld-m68k/got-negative-12-13-14-35-er.d: New dump test.
> 	* ld-m68k/got-multigot-14-ok.d: New dump test.
> 	* ld-m68k/got-multigot-15-er.d: New dump test.
> 	* ld-m68k/got-multigot-12-13-14-34-35-ok.d: New dump test.
> 	* ld-m68k/xgot-15.s: New source.
> 	* ld-m68k/got-xgot-15-ok.d: New test.
> 	* ld-m68k/got-xgot-12-13-14-15-34-35-ok.d: New test.
> 	* ld-m68k/m68k.exp: Run new tests.

Approved and applied.  Finally!  Sorry about the very long wait to 
review and apply this patch.

Cheers
   Nick