diff options
author | Nick Clifton <nickc@redhat.com> | 2008-05-21 12:01:37 +0000 |
---|---|---|
committer | Nick Clifton <nickc@redhat.com> | 2008-05-21 12:01:37 +0000 |
commit | 7fb9f789e396b4653bba0ff56d786f5470a870c9 (patch) | |
tree | bb01440a6b01700909481064c73ebfa0ee9be648 /ld/ld.texinfo | |
parent | 90b5b1a5e42372c0fde6186d08235aa4746d9707 (diff) | |
download | gdb-7fb9f789e396b4653bba0ff56d786f5470a870c9.zip gdb-7fb9f789e396b4653bba0ff56d786f5470a870c9.tar.gz gdb-7fb9f789e396b4653bba0ff56d786f5470a870c9.tar.bz2 |
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.
* NEWS: Mention the new feature.
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.
Diffstat (limited to 'ld/ld.texinfo')
-rw-r--r-- | ld/ld.texinfo | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/ld/ld.texinfo b/ld/ld.texinfo index acafbd3..e7dbd7b 100644 --- a/ld/ld.texinfo +++ b/ld/ld.texinfo @@ -25,6 +25,7 @@ @set HPPA @set I960 @set M68HC11 +@set M68K @set MMIX @set MSP430 @set POWERPC @@ -145,6 +146,9 @@ section entitled ``GNU Free Documentation License''. @ifset M68HC11 * M68HC11/68HC12:: ld and the Motorola 68HC11 and 68HC12 families @end ifset +@ifset M68K +* M68K:: ld and Motorola 68K family +@end ifset @ifset POWERPC * PowerPC ELF32:: ld and PowerPC 32-bit ELF Support @end ifset @@ -2440,6 +2444,28 @@ paging and addresses within the memory window. @c man end @end ifset +@ifset M68K +@subsection Options specific to Motorola 68K target + +@c man begin OPTIONS + +The following options are supported to control handling of GOT generation +when linking for 68K targets. + +@table @gcctabopt + +@kindex --got +@item --got=@var{type} +This option tells the linker which GOT generation scheme to use. +@var{type} should be one of @samp{single}, @samp{negative}, +@samp{multigot} or @samp{target}. For more information refer to the +Info entry for @file{ld}. + +@end table + +@c man end +@end ifset + @ifset UsesEnvVars @node Environment @section Environment Variables @@ -5309,6 +5335,9 @@ functionality are not listed. @ifset HPPA * HPPA ELF32:: @command{ld} and HPPA 32-bit ELF @end ifset +@ifset M68K +* M68K:: @command{ld} and the Motorola 68K family +@end ifset @ifset MMIX * MMIX:: @command{ld} and MMIX @end ifset @@ -5731,6 +5760,35 @@ large, it may not be possible for a branch to reach its stub. @end ifclear @end ifset +@ifset M68K +@ifclear GENERIC +@raisesections +@end ifclear + +@node M68K +@section @command{ld} and the Motorola 68K family + +@cindex Motorola 68K GOT generation +@kindex --got=@var{type} +The @samp{--got=@var{type}} option lets you choose the GOT generation scheme. +The choices are @samp{single}, @samp{negative}, @samp{multigot} and +@samp{target}. When @samp{target} is selected the linker chooses +the default GOT generation scheme for the current target. +@samp{single} tells the linker to generate a single GOT with +entries only at non-negative offsets. +@samp{negative} instructs the linker to generate a single GOT with +entries at both negative and positive offsets. Not all environments +support such GOTs. +@samp{multigot} allows the linker to generate several GOTs in the +output file. All GOT references from a single input object +file access the same GOT, but references from different input object +files might access different GOTs. Not all environments support such GOTs. + +@ifclear GENERIC +@lowersections +@end ifclear +@end ifset + @ifset MMIX @ifclear GENERIC @raisesections |