darling-gdb/gold
Cary Coutant f0f9babffe * incremental-dump.cc (dump_incremental_inputs): Print local
symbol info for each input file.
	* incremental.cc
	(Output_section_incremental_inputs::set_final_data_size): Add local
	symbol info to input file entries in incremental info.
	(Output_section_incremental_inputs::write_info_blocks): Likewise.
	(Sized_incr_relobj::Sized_incr_relobj): Initialize new data members.
	(Sized_incr_relobj::do_add_symbols): Cosmetic change.
	(Sized_incr_relobj::do_count_local_symbols): Replace stub with
	implementation.
	(Sized_incr_relobj::do_finalize_local_symbols): Likewise.
	(Sized_incr_relobj::do_relocate): Write the local symbols.
	(Sized_incr_dynobj::do_add_symbols): Cosmetic change.
	* incremental.h (Incremental_inputs_reader::get_symbol_offset):
	Adjust size of input file header.
	(Incremental_inputs_reader::get_local_symbol_offset): New function.
	(Incremental_inputs_reader::get_local_symbol_count): New function.
	(Incremental_inputs_reader::get_input_section): Adjust size of input
	file header.
	(Incremental_inputs_reader::get_global_symbol_reader): Likewise.
	(Sized_incr_relobj::This): New typedef.
	(Sized_incr_relobj::sym_size): New const data member.
	(Sized_incr_relobj::Local_symbol): New struct.
	(Sized_incr_relobj::do_output_local_symbol_count): New function.
	(Sized_incr_relobj::do_local_symbol_offset): New function.
	(Sized_incr_relobj::local_symbol_count_): New data member.
	(Sized_incr_relobj::output_local_dynsym_count_): New data member.
	(Sized_incr_relobj::local_symbol_index_): New data member.
	(Sized_incr_relobj::local_symbol_offset_): New data member.
	(Sized_incr_relobj::local_dynsym_offset_): New data member.
	(Sized_incr_relobj::local_symbols_): New data member.
	* object.h (Relobj::output_local_symbol_count): New function.
	(Relobj::local_symbol_offset): New function.
	(Relobj::do_output_local_symbol_count): New function.
	(Relobj::do_local_symbol_offset): New function.
	(Sized_relobj::do_output_local_symbol_count): New function.
	(Sized_relobj::do_local_symbol_offset): New function.
2011-04-25 20:28:48 +00:00
..
po Updated Spanish translations. 2010-05-05 15:28:26 +00:00
testsuite 2011-04-22 Doug Kwan <dougkwan@google.com> 2011-04-22 21:50:03 +00:00
aclocal.m4 * Makefile.in: Rebuild with automake 1.11.1. 2010-08-19 23:42:03 +00:00
archive.cc * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
archive.h PR gold/12689 2011-04-20 18:20:51 +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 2011-04-22 Doug Kwan <dougkwan@google.com> 2011-04-22 21:50:03 +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: Fix file comment. 2009-02-07 01:03:32 +00:00
binary.h Add support for --format binary for input files. 2008-02-08 07:06:58 +00:00
ChangeLog * incremental-dump.cc (dump_incremental_inputs): Print local 2011-04-25 20:28:48 +00:00
common.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +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: Check for sys/mman.h and mmap. Check for mremap 2011-04-12 18:06:16 +00:00
configure * configure.ac: Check for sys/mman.h and mmap. Check for mremap 2011-04-12 18:06:16 +00:00
configure.ac * configure.ac: Check for sys/mman.h and mmap. Check for mremap 2011-04-12 18:06:16 +00:00
configure.tgt 2010-02-02 Doug Kwan <dougkwan@google.com> 2010-02-03 05:36:55 +00:00
copy-relocs.cc PR gold/10708 2010-11-05 21:14:33 +00:00
copy-relocs.h Handle output sections with more than 0x7fffffff bytes. 2008-07-10 23:01:20 +00:00
cref.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
cref.h PR 10980 2010-01-05 21:52:51 +00:00
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 Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
descriptors.cc * descriptors.cc (set_close_on_exec): New function. 2011-04-22 23:20:28 +00:00
descriptors.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
dirsearch.cc * dirsearch.cc (Dirsearch::initialize): Add all blockers before 2010-02-11 07:42:17 +00:00
dirsearch.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
dwarf_reader.cc 2011-04-05 Paul Pluzhnikov <ppluzhnikov@google.com> 2011-04-05 19:19:42 +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 * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
dynobj.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
ehframe.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
ehframe.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
errors.cc * object.cc (Relocate_info::location): Simplify location string. 2011-04-18 05:39:43 +00:00
errors.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
expression.cc 2010-11-18 Doug Kwan <dougkwan@google.com> 2010-11-18 23:25:08 +00:00
ffsll.c * ffsll.c (ffsll): Correct implementation. 2009-03-30 23:17:11 +00:00
fileread.cc * configure.ac: Check for sys/mman.h and mmap. Check for mremap 2011-04-12 18:06:16 +00:00
fileread.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
freebsd.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
ftruncate.c * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
gc.cc 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
gc.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +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 * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
gold.h * configure.ac: Check for sys/mman.h and mmap. Check for mremap 2011-04-12 18:06:16 +00:00
i386.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
icf.cc 2011-02-02 Sriraman Tallam <tmsriram@google.com> 2011-02-02 21:55:29 +00:00
icf.h 2011-02-02 Sriraman Tallam <tmsriram@google.com> 2011-02-02 21:55:29 +00:00
incremental-dump.cc * incremental-dump.cc (dump_incremental_inputs): Print local 2011-04-25 20:28:48 +00:00
incremental.cc * incremental-dump.cc (dump_incremental_inputs): Print local 2011-04-25 20:28:48 +00:00
incremental.h * incremental-dump.cc (dump_incremental_inputs): Print local 2011-04-25 20:28:48 +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 * incremental.cc (Sized_incremental_binary::setup_readers): Allocate 2011-04-22 22:39:55 +00:00
layout.h * gold/layout.cc (Layout::symtab_section_offset): New function. 2011-04-14 23:29:41 +00:00
main.cc * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
Makefile.am Properly install gold/ld as default cross linker. 2010-04-27 16:05:54 +00:00
Makefile.in * Makefile.in: Rebuild with automake 1.11.1. 2010-08-19 23:42:03 +00:00
mapfile.cc PR gold/10708 2010-11-05 21:14:33 +00:00
mapfile.h PR 10980 2010-01-05 21:52:51 +00:00
merge.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +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 * NEWS: New file. 2008-03-25 21:55:29 +00:00
object.cc * object.cc (Relocate_info::location): Simplify location string. 2011-04-18 05:39:43 +00:00
object.h * incremental-dump.cc (dump_incremental_inputs): Print local 2011-04-25 20:28:48 +00:00
options.cc * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
options.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
output.cc * descriptors.cc (set_close_on_exec): New function. 2011-04-22 23:20:28 +00:00
output.h * configure.ac: Check for sys/mman.h and mmap. Check for mremap 2011-04-12 18:06:16 +00:00
parameters.cc * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
parameters.h * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
plugin.cc * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
plugin.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
powerpc.cc gold/ 2010-11-11 10:43:30 +00:00
pread.c * pread.c: Include stdio.h. 2009-10-09 23:10:15 +00:00
README * README: Update compilers known to work and fail. 2010-12-01 16:51:44 +00:00
readsyms.cc * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +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 Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
reloc-types.h * copy-relocs.cc: New file. 2008-04-16 22:54:29 +00:00
reloc.cc * gold/layout.cc (Layout::symtab_section_offset): New function. 2011-04-14 23:29:41 +00:00
reloc.h * dwarf_reader.h (class Sized_dwarf_line_info): Add 2010-12-01 19:49:22 +00:00
resolve.cc * resolve.cc (symbol_to_bits): Report the value of the unsupported 2010-10-11 20:04:04 +00:00
script-c.h * README: Remove claim that MEMORY is not supported. 2010-09-08 16:10:33 +00:00
script-sections.cc * script-sections.cc (Sort_output_sections::script_compare): 2011-03-14 15:22:16 +00:00
script-sections.h * script-sections.h (class Script_sections): Make 2010-10-12 19:21:41 +00:00
script.cc * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
script.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
sparc.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
stringpool.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
stringpool.h * merge.cc (Output_merge_string::do_add_input_section): Count strings 2010-08-03 20:38:09 +00:00
symtab.cc * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
symtab.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
target-reloc.h * incremental.cc (Sized_incremental_binary::setup_readers): Allocate 2011-04-22 22:39:55 +00:00
target-select.cc * gold-threads.h (class Once): Define. 2010-02-12 03:23:26 +00:00
target-select.h * gold-threads.h (class Once): Define. 2010-02-12 03:23:26 +00:00
target.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
target.h * incremental.cc (Sized_incremental_binary::setup_readers): Allocate 2011-04-22 22:39:55 +00:00
timer.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
timer.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
tls.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
TODO * TODO: New file. 2008-04-03 00:33:37 +00:00
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 Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
workqueue-threads.cc Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
workqueue.cc 2009-12-29 Rafael Espindola <espindola@google.com> 2009-12-29 23:45:10 +00:00
workqueue.h * gold.cc (queue_middle_tasks): If no input files were opened, 2010-02-23 17:42:26 +00:00
x86_64.cc * incremental.cc (Sized_incremental_binary::setup_readers): Allocate 2011-04-22 22:39:55 +00:00
yyscript.y * README: Remove claim that MEMORY is not supported. 2010-09-08 16:10:33 +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.