darling-gdb/gold
Ian Lance Taylor 83896202bf * object.h (Relobj::local_symbol_value): New function.
(Relobj::local_plt_offset): New function.
	(Relobj::local_has_got_offset): New function.
	(Relobj::local_got_offset): New function.
	(Relobj::set_local_got_offset): New function.
	(Relobj::do_local_symbol_value): New pure virtual function.
	(Relobj::do_local_plt_offset): Likewise.
	(Relobj::do_local_has_got_offset): Likewise.
	(Relobj::do_local_got_offset): Likewise.
	(Relobj::do_set_local_got_offset): Likewise.
	(Sized_relobj::do_local_has_got_offset): Rename from
	local_has_got_offset.
	(Sized_relobj::do_local_got_offset): Rename from local_got_offset.
	(Sized_relobj::do_set_local_got_offset): Rename from
	set_local_got_offset.
	(Sized_relobj_file::do_local_plt_offset): Rename from
	local_plt_offset.
	(Sized_relobj_file::do_local_symbol_value): New function.
	* object.cc (Sized_relobj_file::do_local_plt_offset): Rename from
	local_plt_offset.
	* output.cc (Output_data_got::Got_entry::write): Change object to
	Relobj.  Use local_symbol_value.
	(Output_data_got::add_global_with_rel): Change rel_dyn to
	Output_data_reloc_generic*.  Use add_global_generic.
	(Output_data_got::add_global_with_rela): Remove.  Change all
	callers to use add_global_with_rel.
	(Output_data_got::add_global_pair_with_rel): Change rel_dyn to
	Output_data_reloc_generic*.  Use add_global_generic.
	(Output_data_got::add_global_pair_with_rela): Remove.  Change all
	callers to use add_global_pair_with_rel.
	(Output_data_got::add_local): Change object to Relobj*.
	(Output_data_got::add_local_plt): Likewise.
	(Output_data_got::add_local_with_rel): Change object to Relobj*,
	change rel_dyn to Output_data_reloc_generic*.  Use
	add_local_generic.
	(Output_data_got::add_local_with_rela): Remove.  Change all
	callers to use all_local_with_rel.
	(Output_data_got::add_local_pair_with_rel): Change object to
	Relobj*, change rel_dyn to Output_data_reloc_generic*.  Use
	add_output_section_generic.
	(Output_data_got::add_local_pair_with_rela): Remove.  Change all
	callers to use add_local_pair_with_rel.
	(Output_data_got::reserve_local): Change object to Relobj*.
	* output.h: (class Output_data_reloc_generic): Add pure virtual
	declarations for add_global_generic, add_local_generic,
	add_output_section_generic.
	(class Output_data_reloc) [SHT_REL, SHT_RELA]: Implement new
	functions for Output_data_reloc_generic.  Update declarations for
	changes listed in output.cc.
	(class Output_data_got): Change template parameter to got_size.
	Don't define Rel_dyn or Rela_dyn.  Update declarations per above.
	* incremental.h (Sized_relobj_incr::do_local_symbol_value): New
	function.
	(Sized_relobj_incr::do_local_plt_offset): New function.
	* copy-relocs.cc (Copy_relocs::Copy_reloc_entry::emit): Call
	add_global_generic.
2011-12-19 21:07:16 +00:00
..
po * po/it.po: New Italian translation. 2011-11-25 09:15:26 +00:00
testsuite 2011-11-09 Doug Kwan <dougkwan@google.com> 2011-11-10 00:41:53 +00:00
aclocal.m4 * Makefile.in: Rebuild with automake 1.11.1. 2010-08-19 23:42:03 +00:00
archive.cc 2011-07-13 Sriraman Tallam <tmsriram@google.com> 2011-07-14 00:55:18 +00:00
archive.h PR gold/12163 2011-06-02 20:13:23 +00:00
arm-reloc-property.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
arm-reloc-property.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
arm-reloc.def Fix typos in gold. 2010-12-14 19:03:30 +00:00
arm.cc 2011-11-11 Doug Kwan <dougkwan@google.com> 2011-11-11 21:49:36 +00:00
attributes.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
attributes.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
binary.cc * binary.cc (Binary_to_elf::sized_convert): Don't crash if the 2011-05-29 17:17:39 +00:00
binary.h
ChangeLog * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
common.cc * common.cc (Symbol_table::do_allocate_commons_list): Call 2011-06-08 04:43:28 +00:00
common.h * gold.cc (queue_middle_gc_tasks): Use a separate blocker for each 2010-02-12 04:33:53 +00:00
compressed_output.cc * compressed_output.cc (zlib_decompress): Fix signature in 2010-07-13 11:59:02 +00:00
compressed_output.h * compressed_output.cc (zlib_decompress): New function. 2010-07-12 17:59:58 +00:00
config.in * configure.ac: Add --with-lib-path option. Define LIB_PATH and 2011-11-03 04:32:01 +00:00
configure * configure.ac: Add --with-lib-path option. Define LIB_PATH and 2011-11-03 04:32:01 +00:00
configure.ac * configure.ac: Add --with-lib-path option. Define LIB_PATH and 2011-11-03 04:32:01 +00:00
configure.tgt 2010-02-02 Doug Kwan <dougkwan@google.com> 2010-02-03 05:36:55 +00:00
copy-relocs.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
copy-relocs.h * copy-relocs.cc (Copy_relocs::copy_reloc): Call make_copy_reloc 2011-06-08 03:50:12 +00:00
cref.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
cref.h
debug.h * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
defstd.cc PR 10893 2010-08-19 22:50:16 +00:00
defstd.h
descriptors.cc * descriptors.cc (set_close_on_exec): New function. 2011-04-22 23:20:28 +00:00
descriptors.h
dirsearch.cc 2011-11-17 Sterling Augustine <saugustine@google.com> 2011-11-17 17:46:54 +00:00
dirsearch.h 2011-11-17 Sterling Augustine <saugustine@google.com> 2011-11-17 17:46:54 +00:00
dwarf_reader.cc 2011-12-17 Cary Coutant <ccoutant@google.com> 2011-12-17 22:39:52 +00:00
dwarf_reader.h * dwarf_reader.cc (Sized_dwarf_line_info): Include all lines, 2011-03-10 01:31:33 +00:00
dynobj.cc PR gold/12525 2011-07-02 05:30:00 +00:00
dynobj.h PR gold/12525 2011-07-02 05:30:00 +00:00
ehframe.cc PR gold/12525 2011-07-02 00:03:25 +00:00
ehframe.h PR gold/12571 2011-07-01 22:05:01 +00:00
errors.cc * common.cc (Symbol_table::do_allocate_commons_list): Call 2011-06-08 04:43:28 +00:00
errors.h * common.cc (Symbol_table::do_allocate_commons_list): Call 2011-06-08 04:43:28 +00:00
expression.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
ffsll.c
fileread.cc PR gold/13288 2011-10-17 23:36:43 +00:00
fileread.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
freebsd.h * options.h (class General_options): Add --print-output-format. 2011-07-15 21:43:08 +00:00
ftruncate.c
gc.cc
gc.h * incremental-dump.cc (dump_incremental_inputs): Print dynamic reloc 2011-05-24 21:41:10 +00:00
gold-threads.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
gold-threads.h 2010-02-22 Doug Kwan <dougkwan@google.com> 2010-02-22 18:26:29 +00:00
gold.cc * gold.cc: Include timer.h. 2011-10-18 00:06:10 +00:00
gold.h * common.cc (Symbol_table::do_allocate_commons_list): Call 2011-06-08 04:43:28 +00:00
i386.cc 2011-12-17 Cary Coutant <ccoutant@google.com> 2011-12-17 22:39:52 +00:00
icf.cc * target.h (Target::can_check_for_function_pointers): Rewrite. 2011-06-28 21:15:42 +00:00
icf.h 2011-02-02 Sriraman Tallam <tmsriram@google.com> 2011-02-02 21:55:29 +00:00
incremental-dump.cc * common.cc (Symbol_table::do_allocate_commons_list): For incremental 2011-06-08 04:05:25 +00:00
incremental.cc * gold/incremental.cc (Sized_relobj_incr::Sized_relobj_incr): 2011-10-10 17:38:07 +00:00
incremental.h * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
int_encoding.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
int_encoding.h * arm.cc (Target_arm<big_endian>::gc_process_relocs): Add template 2010-07-29 18:57:28 +00:00
layout.cc PR gold/13204 2011-10-19 15:05:58 +00:00
layout.h 2011-09-29 Sriraman Tallam <tmsriram@google.com> 2011-09-29 23:45:57 +00:00
main.cc * gold.cc: Include timer.h. 2011-10-18 00:06:10 +00:00
Makefile.am * configure.ac: Add --with-lib-path option. Define LIB_PATH and 2011-11-03 04:32:01 +00:00
Makefile.in * configure.ac: Add --with-lib-path option. Define LIB_PATH and 2011-11-03 04:32:01 +00:00
mapfile.cc * incremental-dump.cc (dump_incremental_inputs): Print dynamic reloc 2011-05-24 21:41:10 +00:00
mapfile.h * incremental-dump.cc (dump_incremental_inputs): Print dynamic reloc 2011-05-24 21:41:10 +00:00
merge.cc PR gold/12571 2011-07-01 22:05:01 +00:00
merge.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
mremap.c * configure.ac: Check for sys/mman.h and mmap. Check for mremap 2011-04-12 18:06:16 +00:00
NEWS
object.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
object.h * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
options.cc * configure.ac: Add --with-lib-path option. Define LIB_PATH and 2011-11-03 04:32:01 +00:00
options.h * configure.ac: Add --with-lib-path option. Define LIB_PATH and 2011-11-03 04:32:01 +00:00
output.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
output.h * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
parameters.cc * gold.cc: Include timer.h. 2011-10-18 00:06:10 +00:00
parameters.h * gold.cc: Include timer.h. 2011-10-18 00:06:10 +00:00
plugin.cc PR gold/13245 2011-10-18 00:25:53 +00:00
plugin.h include/ChangeLog 2011-09-26 23:00:17 +00:00
powerpc.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
pread.c
README * README: Update compilers known to work and fail. 2010-12-01 16:51:44 +00:00
readsyms.cc * readsyms.cc (Read_symbols::run): Don't queue an unblocker 2011-10-17 23:43:18 +00:00
readsyms.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
reduced_debug_output.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
reduced_debug_output.h
reloc-types.h
reloc.cc * layout.cc: Include "object.h". 2011-06-25 00:40:57 +00:00
reloc.h 2011-11-10 Doug Kwan <dougkwan@google.com> 2011-11-10 20:53:36 +00:00
resolve.cc 2011-12-17 Cary Coutant <ccoutant@google.com> 2011-12-17 22:39:52 +00:00
script-c.h * README: Remove claim that MEMORY is not supported. 2010-09-08 16:10:33 +00:00
script-sections.cc PR gold/13023 2011-10-31 22:51:03 +00:00
script-sections.h * script-sections.h (class Script_sections): Make 2010-10-12 19:21:41 +00:00
script.cc 2011-11-17 Sterling Augustine <saugustine@google.com> 2011-11-17 17:46:54 +00:00
script.h PR gold/13023 2011-10-31 22:51:03 +00:00
sparc.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
stringpool.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
stringpool.h * symtab.cc (Symbol::versioned_name): New function. 2011-06-28 05:39:45 +00:00
symtab.cc * options.h (class General_options): Add --[no-]gnu-unique options. 2011-10-31 22:43:49 +00:00
symtab.h 2011-10-31 Sriraman Tallam <tmsriram@google.com> 2011-10-31 21:36:54 +00:00
target-reloc.h Replace <64, false> with <size, big_endian> 2011-12-15 23:29:24 +00:00
target-select.cc * options.h (class General_options): Add --print-output-format. 2011-07-15 21:43:08 +00:00
target-select.h * options.h (class General_options): Add --print-output-format. 2011-07-15 21:43:08 +00:00
target.cc * layout.cc (Layout::set_segment_offsets): Don't realign text 2011-08-01 18:25:22 +00:00
target.h PR gold/12372 2011-07-08 22:48:08 +00:00
timer.cc * gold.cc: Include timer.h. 2011-10-18 00:06:10 +00:00
timer.h * gold.cc: Include timer.h. 2011-10-18 00:06:10 +00:00
tls.h
TODO
token.h * dirsearch.cc (Dirsearch::initialize): Add all blockers before 2010-02-11 07:42:17 +00:00
version.cc * version.cc (version_string): Bump to 1.11. 2011-01-24 22:27:55 +00:00
workqueue-internal.h * workqueue-internal.h (Workqueue_threader::should_cancel_thread): 2011-07-28 23:25:06 +00:00
workqueue-threads.cc * workqueue-internal.h (Workqueue_threader::should_cancel_thread): 2011-07-28 23:25:06 +00:00
workqueue.cc * workqueue-internal.h (Workqueue_threader::should_cancel_thread): 2011-07-28 23:25:06 +00:00
workqueue.h * workqueue-internal.h (Workqueue_threader::should_cancel_thread): 2011-07-28 23:25:06 +00:00
x86_64.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
yyscript.y 2011-11-11 Sterling Augustine <saugustine@google.com> 2011-11-11 22:29:43 +00:00

gold is an ELF linker.  It is intended to have complete support for
ELF and to run as fast as possible on modern systems.  For normal use
it is a drop-in replacement for the older GNU linker.

gold is part of the GNU binutils.  See ../binutils/README for more
general notes, including where to send bug reports.

gold was originally developed at Google, and was contributed to the
Free Software Foundation in March 2008.  At Google it was designed by
Ian Lance Taylor, with major contributions by Cary Coutant, Craig
Silverstein, and Andrew Chatham.

The existing GNU linker manual is intended to be accurate
documentation for features which gold supports.  gold supports most of
the features of the GNU linker for ELF targets.  Notable
omissions--features of the GNU linker not currently supported in
gold--are:
  * MRI compatible linker scripts
  * cross-reference reports (--cref)
  * various other minor options


Notes on the code
=================

These are some notes which may be helpful to people working on the
source code of gold itself.

gold is written in C++.  It is a GNU program, and therefore follows
the GNU formatting standards as modified for C++.  Source documents in
order of decreasing precedence:
    http://www.gnu.org/prep/standards/
    http://gcc.gnu.org/onlinedocs/libstdc++/17_intro/C++STYLE
    http://www.zembu.com/eng/procs/c++style.html

The linker is intended to have complete support for cross-compilation,
while still supporting the normal case of native linking as fast as
possible.  In order to do this, many classes are actually templates
whose parameter is the ELF file class (e.g., 32 bits or 64 bits).  The
C++ code is the same, but we don't pay the execution time cost of
always using 64-bit integers if the target is 32 bits.  Many of these
class templates also have an endianness parameter: true for
big-endian, false for little-endian.

The linker is multi-threaded.  The Task class represents a single unit
of work.  Task objects are stored on a single Workqueue object.  Tasks
communicate via Task_token objects.  Task_token objects are only
manipulated while holding the master Workqueue lock.  Relatively few
mutexes are used.


Build requirements
==================

The gold source code uses templates heavily.  Building it requires a
recent version of g++.  g++ 4.0.3 and 4.1.3 are known to work.  g++
3.2, 3.4.3, and 4.1.2 are known to fail.

The linker script parser uses features which are only in newer
versions of bison.  bison 2.3 is known to work.  bison 1.26 is known
to fail.  If you are building gold from an official binutils release,
the bison output should already be included.