For relocatable link, we should clear the SHF_COMPRESSED flag bit from
input group section.
PR gold/18689
* layout.cc (Layout::layout): Clear the SHF_COMPRESSED flag bit
from input group section for relocatable link.
* testsuite/Makefile.am (check_SCRIPTS): Add pr18689.sh.
(check_DATA): Add pr18689.stdout.
(MOSTLYCLEANFILES): Add pr18689a.o pr18689b.o.
(pr18689.stdout): New rule.
(pr18689a.o): Likewise.
(pr18689b.o): Likewise.
(pr18689.o): Likewise.
* testsuite/pr18689.c: New file.
* testsuite/pr18689.sh: Likewise.
* testsuite/Makefile.in: Regenerated.
This patch adds SHF_COMPRESSED section decompression to gold.
PR gold/18321
* compressed_output.h (decompress_input_section): Add arguments
for ELF class, big endian and sh_flags.
* compressed_output.cc (decompress_input_section): Likewise.
Support the SHF_COMPRESSED section.
* dynobj.h (Dynobj): Add elfsize and is_big_endian member
functions.
* plugin.h (Pluginobj): Likewise.
* layout.cc (Layout::get_output_section_flags): Also clear the
SHF_COMPRESSED bit.
* object.h (Compressed_section_info): Add flag to store sh_flags.
(Object): Add pure virtual elfsize and is_big_endian member
functions.
* object.cc (need_decompressed_section): Don't skip the ".zdebug"
prefix here.
(build_compressed_section_map): Check SHF_COMPRESSED for
uncompressed size. Store sh_flags in Compressed_section_info.
Pass size, big_endian and sh_flags to decompress_input_section.
Skip the ".debug"/".zdebug" prefix when passing section name to
need_decompressed_section.
(Sized_relobj_file<size, big_endian>::do_find_special_section):
Don't check ".zdebug_*" sections.
(Object::decompressed_section_contents): Pass ELF class, big
endian and sh_flags to decompress_input_section.
* reloc.cc (Sized_relobj_file<size, big_endian>::write_sections):
Likewise.
* testsuite/Makefile.am (check_DATA): Add
debug_msg_cdebug_gabi.err and gdb_index_test_2_gabi.stdout.
(MOSTLYCLEANFILES): Add debug_msg_cdebug_gabi.err and
gdb_index_test_2_gabi.stdout.
(debug_msg_cdebug_gabi.o): New.
(odr_violation1_cdebug_gabi.o): Likewise.
(odr_violation2_cdebug_gabi.o): Likewise.
(debug_msg_cdebug_gabi.err): Likewise.
(check_SCRIPTS): Add gdb_index_test_2_gabi.sh.
(gdb_index_test_cdebug_gabi.o): Likewise.
(gdb_index_test_2_gabi): Likewise.
(gdb_index_test_2_gabi.stdout): Likewise.
* testsuite/gdb_index_test_2_gabi.sh: New file.
* testsuite/Makefile.in: Regenerated.
When laying out .debug_* sections, we translate the names of compressed
debug sections that start with ".zdebug", but when processing input
section specs in a linker script, we do not handle the translation there.
This results in an internal error as reported in PR 17731.
gold/
PR gold/17731
* layout.cc (corresponding_uncompressed_section_name): New function.
(Layout::choose_output_section): Call it.
* layout.h (corresponding_uncompressed_section_name): New function.
* script-sections.cc (Input_section_info::set_section_name): Check
for compressed debug section (.zdebug style).
When --build-id=tree is selected, gold would schedule a set of
tasks to run to compute md5 hashes in parallel on chunks of the
file. The scheduling was done before the
Write_after_input_sections_task ran, so if we are compressing
debug sections, the output file will change size and be remapped
to a new address, sometimes causing the build id computation to
crash, but even when it doesn't crash, it wouldn't include the
debug information in the hash computation.
This patch delays the scheduling of the md5 tasks until after
Write_after_input_sections_task.
gold/
PR gold/17819
* gold.cc (queue_final_tasks): When --build-id=tree, queue a
separate task to schedule the build id computation.
* layout.cc (Hash_task::Hash_task): Remove build_id_blocker,
add Output_file and offset.
(Hash_task::run): Get and release the input views.
(Hash_task::is_runnable): Always return NULL (always runnable).
(Layout::queue_build_id_tasks): Remove.
(Layout::write_build_id): Add array_of_hashes and size_of_hashes
parameters; use them instead of class members.
(Build_id_task_runner::run): New function.
(Close_task_runner::run): Pass array_of_hashes and size_of_hashes
to write_build_id.
* layout.h (Layout::queue_build_id_tasks): Remove.
(Layout::write_build_id): Add array_of_hashes and size_of_hashes
parameters.
(Layout::array_of_hashes_): Remove.
(Layout::size_of_array_of_hashes_): Remove.
(Layout::input_view_): Remove.
(Build_id_task_runner): New class.
(Close_task_runner::Close_task_runner): Add array_of_hashes and
size_of_hashes parameters.
(Close_task_runner::array_of_hashes_): New data member.
(Close_task_runner::size_of_hashes_): New data member.
* testsuite/Makefile.am
(flagstest_compress_debug_sections_and_build_id_tree): New test.
* testsuite/Makefile.in: Regenerate.
Because the __EH_FRAME_BEGIN__ symbol is provided in an empty .eh_frame
section in crtbeginT.o, if crt1.o has a non-empty .eh_frame section,
we place all optimized .eh_frame sections into the output section ahead
of the __EH_FRAME_BEGIN__ symbol, which breaks EH for statically-linked
binaries.
This patch fixes the problem by delaying the attachment of the optimized
.eh_frame sections to the output section until we see the end marker
section (or to the end of pass 1 if we never see an end marker).
gold/
PR gold/14675
* ehframe.cc (Eh_frame::add_ehframe_input_section): Change return type;
return enum indicating whether .eh_frame section is empty, optimizable,
unrecognized, or an end marker. Adjust explicit instantiations.
* ehframe.h (Eh_frame::Eh_frame_section_disposition): New enum type.
(Eh_frame::add_ehframe_input_section): Change return type.
* gold.cc (queue_middle_tasks): Call Layout::finalize_eh_frame_section.
* layout.cc (Layout::layout_eh_frame): Don't add optimized sections
to the .eh_frame output section until we see the end marker.
(Layout::finalize_eh_frame_section): New.
* layout.h: (Layout::finalize_eh_frame_section): New.
In PR 13577, the complaint was that -Bsymbolic was overriding the binding
behavior for symbols listed in the --dynamic-list by setting the DT_SYMBOLIC
tag in the dynamic table. In reading the Gnu ld manual, I decided that
--dynamic-list should be mutually exclusive of -Bsymbolic, and modified
gold so that --dynamic-list would treat symbols listed as preemptible,
and all other symbols as internally bound. I was wrong.
PR 16992 shows that with --dynamic-list (and not -Bsymbolic), a symbol
not listed in the dynamic list is being internally bound within the
shared library, but because it's still in the dynamic symbol table, we
expose it to a COPY relocation, and things go really bad from there.
(I can reproduce the same failure, simply by turning on -Bsymbolic-functions
with the Gnu linker. Even though the symbol is bound internally, it's
still exported to the dynamic symbol table, and is exposed to a COPY
relocation.)
I've backed out part of the fix for PR 13577, and -Bsymbolic (or
-Bsymbolic-functions) can now be used with --dynamic-list, but if the
two are used together, we do not set DT_SYMBOLIC or DF_SYMBOLIC
(this matches Gnu ld behavior). We now treat symbols listed in the
dynamic list as premptible, but we do not automatically treat symbols
not listed there as non-premptible.
gold/
PR gold/13577
PR gold/16992
* layout.cc (Layout::finish_dynamic_section): Don't set DT_SYMBOLIC or
DF_SYMBOLIC if --dynamic-list option is used.
* options.cc (General_options::finalize): --dynamic-list is not
mutually exclusive with -Bsymbolic.
* symtab.h (Symbol::is_preemptible): Don't exclude dynamic symbols not
listed in --dynamic-list.
* testsuite/Makefile.am (dynamic_list_lib2.so): Add
-Bsymbolic-functions.
* testsuite/Makefile.in: Regenerate.
This fixes an issue where a page-aligned data section, combined with -z relro,
could lead to a gap between text and data segments larger than a page, and
we would fail to overlap the segments in the file.
gold/
* layout.cc (Layout::set_segment_offsets): Don't align start of segment
unless alignment is larger than page size.
gold/
* layout.cc (Layout::finish_dynamic_section): When '-z global'
is specified set DF_1_GLOBAL in DT_FLAGS_1 flags.
* options.h (General_options): New -z option (global).
PR gold/17578 notes that gold will print a warning about an executable stack
when the -z execstack option is given, even when there is no --warn_execstack
option. The warning is completely useless and unexpected, since the user
explicitly requested an executable stack, and did not even ask for warnings.
This patch fixes that, and adds an extra warning when --warn_execstack
and -z noexecstack are both given and an input file requires an executable
stack.
gold/
PR gold/17578
* layout.cc (Layout::layout_gnu_stack): Don't warn when -z execstack
is given.
(Layout::create_executable_stack_info): Warn when -z noexecstack is
given but some inputs require executable stack.
Add .debug_gdb_scripts, .debug_gnu_pubnames, .debug_gnu_pubtypes,
and .debug_str_offsets to lists of sections to strip or keep
when stripping debug info.
gold/
* layout.cc (gdb_sections): Keep .debug_gdb_scripts and
.debug_str_offsets; strip .debug_gnu_pubnames and
.debug_gnu_pubtypes.
(lines_only_debug_sections): Strip all four new sections.
When --hash-style-both is used, gold currently builds the sysv hash
table first, then the gnu hash table. Building the gnu hash table
renumbers the dynamic symbol table, invalidating the sysv hash
table. This patch reverses the order in which the hash tables are
build so that both hash tables are correct.
gold/
PR gold/13597
* layout.cc (Layout::create_dynamic_symtab): Build gnu-style
hash table before sysv-style hash table.
When not stripping those sections, there was a bug where gold was incorrectly
adjusting section-relative offsets by the offset of the input section within
the output section. That adjustment was both unnecessary and wrong, causing
gold to miss a number of debug entries that should have been added to
.gdb_index. (With stripping, the adjustment was always 0, so the bug in
dwarf_reader.cc would have been hidden by the change to layout.cc.)
gold/
* dwarf_reader.h (Dwarf_pubnames_table): Remove output_section_offset_.
* dwarf_reader.cc (Dwarf_pubnames_table::read_section): Likewise.
(Dwarf_pubnames_table::read_header): Likewise.
* layout.cc (gdb_fast_lookup_sections): Add .debug_gnu_pubnames and
.debug_gnu_pubtypes.
2014-04-15 Sasa Stankovic <Sasa.Stankovic@imgtec.com>
gold/
* layout.cc (Layout::include_section): Allow a target to decide
whether to include a section.
* target.h (Target::should_include_section): New function.
(Target::do_should_include_section): New function.
* output.cc (Output_segment::set_section_addresses): Take new
Target* argument. If target->isolate_execinstr() and the segment
is executable and starts at a target->abi_pagesize() boundary,
pad its end out to a target->abi_pagesize() boundary with code fill.
* output.h (Output_segment::set_section_addresses): Update decl.
* layout.h (Layout::check_output_data_for_reset_values): Take new
argument RELAX_OUTPUTS.
(Layout): New member relax_output_list_.
(Layout::add_relax_output): New method.
* layout.cc (Layout::Layout): Update constructor.
(Layout::reset_relax_output): New method.
(Layout::clean_up_after_relaxation): Call it.
(Layout::prepare_for_relaxation): Update caller.
(Layout::set_segment_offsets): Update callers of set_section_addresses.
Call reset_relax_output before re-processing segments for
isolate_execinstr case.
(Layout::write_data): Handle relax_output_list_.
(Layout::Relaxation_debug_check::check_output_data_for_reset_values):
Take new argument RELAX_OUTPUTS. Assert it's an empty collection.
* options.h (General_options): Add -Trodata-segment option.
* parameters.cc (Parameters::check_rodata_segment): New function.
(Parameters::set_target_once): Call it.
* parameters.h (Parameters): Declare it (private member function).
* layout.cc (load_seg_unusable_for_headers): New function, broken
out of Layout::relaxation_loop_body. If TARGET->isolate_execinstr()
then validate rodata segment rather than text segment.
(relaxation_loop_body): Call that.
(is_text_segment): New function. Don't admit a non-executable
segment if TARGET->isolate_execinstr().
(set_segment_offsets): Call it. Honor -Trodata-segment option.
gold/
* layout.cc (Layout::set_segment_offsets): Taking care of the case when
the maximum segment alignment is larger than the page size.
* testsuite/Makefile.am (large_symbol_alignment): Test that Gold
correctly aligns the symbols with large alignemnt.
* testsuite/Makefile.in: Regenerate.
* testsuite/large_symbol_alignment.cc: New file.
Sriraman Tallam <tmsriram@google.com>
* options.h (sort_section): New option.
* output.h (Input_section_sort_section_prefix_special_ordering_compare):
Rename from Input_section_sort_section_name_special_ordering_compare.
(Input_section_sort_section_name_compare): New struct.
* output.cc (Output_section::Input_section_sort_section_name_compare::
operator()): New function.
(Output_section::sort_attached_input_sections): Use new sort function
for .text if --sort-section=name is specified.
* layout.cc (Layout::make_output_section):
Add sorting by name when --sort-section=name is specified.
* testsuite/Makefile.am (text_section_grouping): Test option
--sort-section=name.
* testsuite/Makefile.in: Regenerate.
* testsuite/section_sorting_name.cc: New file.
* testsuite/section_sorting_name.sh: New file.
PR ld/15365
* layout.cc (Layout::finalize): Make __ehdr_start STV_HIDDEN.
ld/
PR ld/15365
* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation):
Restrict __ehdr_start's export class to no less than STV_HIDDEN.
ld/testsuite/
PR ld/15365
* ld-elf/ehdr_start.d: Expect __ehdr_start to be STB_LOCAL.
* ld-mips-elf/ehdr_start-1.nd: New test.
* ld-mips-elf/ehdr_start-2.nd: New test.
* ld-mips-elf/ehdr_start-1.ld: New test linker script.
* ld-mips-elf/ehdr_start-2.ld: New test linker script.
* ld-mips-elf/ehdr_start-new.s: New test source.
* ld-mips-elf/ehdr_start-o32.s: New test source.
* ld-mips-elf/mips-elf.exp: Run the new tests.
gold/
* gold.cc (queue_final_tasks): invoke layout->queue_build_id_tasks().
* layout.cc (Hash_task): New class.
(Layout::queue_build_id_tasks): New function.
(Layout::write_build_id): Handle single-thread portion of build ID
computation. (In some cases, all of it is single-threaded.) Replace
{sha1,md5}_process_bytes with {sha1,md5}_buffer to get the same
functionality in fewer lines of code.
* layout.h (Layout::queue_build_id_tasks): New function declaration.
* options.h (General_options): make "--build-id" default to tree
rather than sha1. Add two new options related to --build-id=tree:
--build-id-chunk-size-for-treehash and
--build-id-min-file-size-for-treehash.
* Makefile.am: add testing of --build-id=tree and related new options
(these tests will be invoked by "make check").
* Makefile.in: Regenerate.
2013-01-24 Sriraman Tallam <tmsriram@google.com>
* layout.cc (Layout::layout): Check for option text_reorder.
(Layout::make_output_section): Ditto.
* options.h (text_reorder): New option.
* output.cc (Input_section_sort_compare): Remove special ordering
of section names.
(Output_section::
Input_section_sort_section_name_special_ordering_compare::
operator()): New function.
(Output_section::sort_attached_input_sections): Use new sort function
for .text.
* output.h (Input_section_sort_section_name_special_ordering_compare):
New struct.
* testsuite/Makefile.am (text_section_grouping): Test option
--no-text-reorder
* testsuite/Makefile.in: Regenerate.
* testsuite/text_section_grouping.sh: Check order of functions without
default text reordering.
The "new" dtags options have been around for 14+ years, so there
shouldn't be a need to generate both new & old tags anymore.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* layout.cc (Layout::layout): Do not do default sorting for
text sections when section ordering is specified.
(make_output_section): Ditto.
* testsuite/plugin_final_layout.cc: Name the function sections
to catch reordering issues.
function.
(Layout::layout): If input section requires special ordering, must
sort input sections.
(Layout::make_output_section): May sort .text input sections.
(Layout::is_section_name_prefix_grouped): Remove.
* layout.h (class Layout): Declare
special_ordering_of_input_section. Don't declare
is_section_name_prefix_grouped.
* output.cc (Output_section::add_input_section): Revert last
change.
(Output_section::Input_section_sort::match_file_name): Don't crash
if called on output section data.
(Output_section::Input_section_sort_compare): Sort based on
special ordering.
(Output_section::Input_section_sort_section_order_index_compare):
Revert last patch.
(Output_section::sort_attached_input_sections): Likewise.
by default.
2012-12-18 Sriraman Tallam <tmsriram@google.com>
* layout.cc (Layout::is_section_name_prefix_grouped): New function.
* layout.h (Layout::is_section_name_prefix_grouped): New function.
* output.cc (Output_section::add_input_section): Check if section
name contains special prefix. Keep input sections to sort such
sections.
(Output_section::Input_section_sort_section_order_index_compare
::operator()): Group sections according to prefixes.
* (Output_section::sort_attached_input_sections): Add condition
to Input_section_entry constructor call.
* testsuite/Makefile.am (text_section_grouping): New test.
* testsuite/Makefile.in: Regenerate.
* testsuite/text_section_grouping.cc: New file.
* testsuite/text_section_grouping.sh: New file.
* layout.cc (Layout::get_executable_sections): New function.
* arm.cc (Target_arm::group_sections): Use it.
(Arm_output_section::group_sections): Delete now redundant test.
* output.cc (Output_reloc::Output_reloc): Add is_relative.
param to handle relative relocs.
* output.h (Output_reloc::Output_reloc <absolute reloc>): Likewise.
(Output_data_reloc::add_absolute): Adjust.
(Output_data_reloc::add_relative): New function.
(Output_data::reset_data_size): New function.
(Output_relaxed_input_section::set_relobj, set_shndx): New functions.
(Output_section::set_addralign): New function.
(Output_section::checkpoint_set_addralign): New function.
(Output_section::clear_section_offsets_need_adjustment): New function.
(Output_section::input_sections): Make public.
* powerpc.cc (class Output_data_brlt_powerpc): New.
(class Stub_table, class Stub_control): New.
(Powerpc_relobj::has14_, set_has_14bit_branch, has_14bit_branch,
stub_table_, set_stub_table, stub_table): New vectors and accessor
functions.
(Target_powerpc::do_may_relax, do_relax, push_branch,
new_stub_table, stub_tables, brlt_section, group_sections,
add_branch_lookup_table, find_branch_lookup_table,
write_branch_lookup_table, make_brlt_section): New functions.
(Target_powerpc::struct Sort_sections, class Branch_info): New.
(Target_powerpc::brlt_section_, stub_tables_, branch_lookup_table_,
branch_info_): New vars.
(Target_powerpc::make_plt_entry, make_local_ifunc_plt_entry): Don't
make call stubs here.
(Output_data_glink): Remove all call stub handling from this class.
(Target_powerpc::Scan::local, global): Save interesting branch
relocs and relocs for ifunc. Adjust calls to plt entry functions.
(Target_powerpc::do_finalize_sections): Only make reg save/restore
functions on final link.
(Target_powerpc::Relocate::relocate): Adjust lookup of call stubs.
Handle long branch destinations too.
(Target_powerpc::do_dynsym_value, do_plt_address_for_global,
do_plt_address_for_local): Adjust lookup of plt call stubs.
* layout.cc (Layout::set_segment_offsets): When using
common-page-size alignment, ensure we are on a new max-page-size
page.
* output.cc (Output_segment::set_section_addresses): Use
abi_pagesize, not common_pagesize for relro boundary.
(Output_segment::set_offset): Likewise.
segments.
2012-08-24 Sriraman Tallam <tmsriram@google.com>
* gold.cc (queue_middle_tasks): Call layout again when unique
segments for sections is desired.
* layout.cc (Layout::Layout): Initialize new members.
(Layout::get_output_section_flags): New function.
(Layout::choose_output_section): Call get_output_section_flags.
(Layout::layout): Make output section for mapping to a unique segment.
(Layout::insert_section_segment_map): New function.
(Layout::attach_allocated_section_to_segment): Make unique segment for
output sections marked so.
(Layout::segment_precedes): Check for unique segments when sorting.
* layout.h (Layout::Unique_segment_info): New struct.
(Layout::Section_segment_map): New typedef.
(Layout::insert_section_segment_map): New function.
(Layout::get_output_section_flags): New function.
(Layout::is_unique_segment_for_sections_specified): New function.
(Layout::set_unique_segment_for_sections_specified): New function.
(Layout::unique_segment_for_sections_specified_): New member.
(Layout::section_segment_map_): New member.
* object.cc (Sized_relobj_file<size, big_endian>::do_layout):
Rename is_gc_pass_one to is_pass_one.
Rename is_gc_pass_two to is_pass_two.
Rename is_gc_or_icf to is_two_pass.
Check for which pass based on whether symbols data is present.
Make it two pass when unique segments for sections is desired.
* output.cc (Output_section::Output_section): Initialize new
members.
* output.h (Output_section::is_unique_segment): New function.
(Output_section::set_is_unique_segment): New function.
(Output_section::is_unique_segment_): New member.
(Output_section::extra_segment_flags): New function.
(Output_section::set_extra_segment_flags): New function.
(Output_section::extra_segment_flags_): New member.
(Output_section::segment_alignment): New function.
(Output_section::set_segment_alignment): New function.
(Output_section::segment_alignment_): New member.
(Output_segment::Output_segment): Initialize is_unique_segment_.
(Output_segment::is_unique_segment): New function.
(Output_segment::set_is_unique_segment): New function.
(Output_segment::is_unique_segment_): New member.
* plugin.cc (allow_unique_segment_for_sections): New function.
(unique_segment_for_sections): New function.
(Plugin::load): Add new functions to transfer vector.
* Makefile.am (plugin_final_layout.readelf.stdout): Add readelf output.
* Makefile.in: Regenerate.
* testsuite/plugin_final_layout.sh: Check if unique segment
functionality works.
* testsuite/plugin_section_order.c (onload): Check if new interfaces
are available.
(allow_unique_segment_for_sections): New global.
(unique_segment_for_sections): New global.
(claim_file_hook): Call allow_unique_segment_for_sections.
(all_symbols_read_hook): Call unique_segment_for_sections.
2012-08-24 Sriraman Tallam <tmsriram@google.com>
* plugin-api.h (ld_plugin_allow_unique_segment_for_sections):
New interface.
(ld_plugin_unique_segment_for_sections): New interface.
(LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS): New enum val.
(LDPT_UNIQUE_SEGMENT_FOR_SECTIONS): New enum val.
(tv_allow_unique_segment_for_sections): New member.
(tv_unique_segment_for_sections): New member.
* script-sections.cc (Sections_element::output_section_name): Add
keep return parameter.
(Output_section_element::match_name): Add keep return parameter.
Return the value of the keep_ member.
* script-sections.h (class Output_section): Update
output_section_name prototype.
* layout.cc (Layout::keep_input_section): New public member
function.
(Layout::choose_output_section): Pass keep parameter to
output_section_name.
* layout.h (class Layout): Add keep_input_section.
* object.cc (Sized_relobj_file::do_layout): Check for kept input
sections.
* testsuite/Makefile.am: Add a test.
* testsuite/Makefile.in: Regenerate.
* testsuite/pr14265.c: Source file for the test.
* testsuite/pr14265.t: Linker script for the test.
* testsuite/pr14265.sh: Shell script for the test.
* ld-gc/gc.exp: Add a new test.
* ld-gc/pr14265.c: Source file for the new test.
* ld-gc/pr14265.t: Linker script for the new test.
* ld-gc/pr14265.d: Expected symbol dump.
(Target::do_output_section_name): New function.
* layout.cc (Layout::choose_output_section): Call the above.
* powerpc.cc (Target_powerpc::do_output_section_name): New function.
* layout.cc (gdb_sections): Remove ".debug_" prefixes,
add .debug_macro.
(lines_only_debug_sections): Likewise.
(gdb_fast_lookup_sections): New static array.
(is_gdb_debug_section): Rename formal parameter.
(is_lines_only_debug_section): Likewise.
(is_gdb_fast_lookup_section): New function.
(Layout::include_section): Check for ".zdebug_" prefix; pass
section name suffix to is_gdb_debug_section, et al.; check for
fast-lookup sections when building .gdb_index.
* options.h (--strip-debug-gdb): Update GDB version number.
* layout.cc (Layout::section_name_mapping): Add rules to handle
exact match on .data.rel.ro.local or .data.rel.ro.
(Layout::output_section_name): Check for exact matches.
