binutils-gdb/gold
Ian Lance Taylor e2054bcbe6 * testsuite/incremental_test_1.c: Add prototype to avoid warning. 2010-08-13 20:47:47 +00:00
..
po Updated Spanish translations. 2010-05-05 15:28:26 +00:00
testsuite * testsuite/incremental_test_1.c: Add prototype to avoid warning. 2010-08-13 20:47:47 +00:00
ChangeLog * testsuite/incremental_test_1.c: Add prototype to avoid warning. 2010-08-13 20:47:47 +00:00
Makefile.am Properly install gold/ld as default cross linker. 2010-04-27 16:05:54 +00:00
Makefile.in gold: running tests in parallel. 2010-07-28 21:30:13 +00:00
NEWS
README Add support for -pie. 2009-10-14 05:25:02 +00:00
TODO
aclocal.m4 Regenerate tree using Autoconf 2.64 and Automake 1.11. 2009-08-22 16:56:56 +00:00
archive.cc elfcpp/ChangeLog: 2010-08-12 22:01:11 +00:00
archive.h elfcpp/ChangeLog: 2010-08-12 22:01:11 +00:00
arm-reloc-property.cc 2010-06-29 Doug Kwan <dougkwan@google.com> 2010-06-30 06:41:09 +00:00
arm-reloc-property.h 2010-06-29 Doug Kwan <dougkwan@google.com> 2010-06-30 06:41:09 +00:00
arm-reloc.def 2010-02-18 Doug Kwan <dougkwan@google.com> 2010-02-19 22:53:54 +00:00
arm.cc elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
attributes.cc * arm.cc (Target_arm::do_finalize_sections): Create attribute 2010-02-23 17:45:38 +00:00
attributes.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
binary.cc * binary.cc: Fix file comment. 2009-02-07 01:03:32 +00:00
binary.h
common.cc 2010-08-03 Ian Lance Taylor <iant@google.com> 2010-08-03 14:07:13 +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 2009-12-17 Rafael Avila de Espindola <espindola@google.com> 2009-12-17 16:02:03 +00:00
configure gold: 2010-04-27 14:12:32 +00:00
configure.ac gold: running tests in parallel. 2010-07-28 21:30:13 +00:00
configure.tgt 2010-02-02 Doug Kwan <dougkwan@google.com> 2010-02-03 05:36:55 +00:00
copy-relocs.cc 2010-08-03 Ian Lance Taylor <iant@google.com> 2010-08-03 14:07:13 +00:00
copy-relocs.h
cref.cc PR 10980 2010-01-05 21:52:51 +00:00
cref.h PR 10980 2010-01-05 21:52:51 +00:00
debug.h 2009-09-17 Doug Kwan <dougkwan@google.com> 2009-09-18 01:10:38 +00:00
defstd.cc PR 10876 2009-11-07 02:02:29 +00:00
defstd.h
descriptors.cc * descriptors.cc (Descriptors::open): Report correct name in error 2010-07-14 10:38:59 +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 * readsyms.cc (Read_symbols::incompatible_warning): New function. 2009-03-14 05:56:46 +00:00
dwarf_reader.cc * compressed_output.cc (zlib_decompress): New function. 2010-07-12 17:59:58 +00:00
dwarf_reader.h 2009-12-08 Doug Kwan <dougkwan@google.com> 2009-12-09 03:02:28 +00:00
dynobj.cc PR 11855 2010-08-02 13:34:33 +00:00
dynobj.h PR 11855 2010-08-02 13:34:33 +00:00
ehframe.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
ehframe.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
errors.cc PR 10980 2010-01-07 18:31:30 +00:00
errors.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
expression.cc * expression.cc (Expression::Expression_eval_info): Add 2010-04-23 04:47:33 +00:00
ffsll.c * ffsll.c (ffsll): Correct implementation. 2009-03-30 23:17:11 +00:00
fileread.cc 2010-07-13 Rafael Espindola <espindola@google.com> 2010-07-13 14:59:02 +00:00
fileread.h 2010-07-13 Rafael Espindola <espindola@google.com> 2010-07-13 14:59:02 +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 * arm.cc (Target_arm<big_endian>::gc_process_relocs): Add template 2010-07-29 18:57:28 +00:00
gold-threads.cc * gold-threads.cc (Lock_impl_threads::Lock_impl_threads): Correct 2010-06-07 15:00:44 +00:00
gold-threads.h 2010-02-22 Doug Kwan <dougkwan@google.com> 2010-02-22 18:26:29 +00:00
gold.cc PR 11855 2010-08-02 13:34:33 +00:00
gold.h * gold.h (is_wildcard_string): New function. 2010-06-01 23:37:58 +00:00
i386.cc elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
icf.cc * arm.cc (Target_arm<big_endian>::gc_process_relocs): Add template 2010-07-29 18:57:28 +00:00
icf.h * arm.cc (Target_arm<big_endian>::gc_process_relocs): Add template 2010-07-29 18:57:28 +00:00
incremental-dump.cc elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
incremental.cc elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
incremental.h elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
int_encoding.cc 2009-12-08 Doug Kwan <dougkwan@google.com> 2009-12-09 03:02:28 +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 elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
layout.h elfcpp/ChangeLog: 2010-08-12 22:01:11 +00:00
main.cc elfcpp/ChangeLog: 2010-08-12 22:01:11 +00:00
mapfile.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
mapfile.h PR 10980 2010-01-05 21:52:51 +00:00
merge.cc * merge.cc (Output_merge_string::do_add_input_section): Count strings 2010-08-03 20:38:09 +00:00
merge.h * merge.cc (Output_merge_string::do_add_input_section): Count strings 2010-08-03 20:38:09 +00:00
mremap.c * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
object.cc elfcpp/ChangeLog: 2010-08-12 22:01:11 +00:00
object.h elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
options.cc 2010-05-18 Rafael Espindola <espindola@google.com> 2010-05-18 18:08:03 +00:00
options.h Index: gold/arm.cc 2010-08-12 18:27:46 +00:00
output.cc 2010-08-03 Ian Lance Taylor <iant@google.com> 2010-08-03 14:07:13 +00:00
output.h 2010-08-03 Ian Lance Taylor <iant@google.com> 2010-08-03 14:07:13 +00:00
parameters.cc 2010-04-07 Doug Kwan <dougkwan@google.com> 2010-04-07 21:42:22 +00:00
parameters.h 2010-04-07 Doug Kwan <dougkwan@google.com> 2010-04-07 21:42:22 +00:00
plugin.cc elfcpp/ChangeLog: 2010-08-12 22:01:11 +00:00
plugin.h PR 11855 2010-08-02 13:34:33 +00:00
powerpc.cc elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
pread.c * pread.c: Include stdio.h. 2009-10-09 23:10:15 +00:00
readsyms.cc elfcpp/ChangeLog: 2010-08-12 22:01:11 +00:00
readsyms.h 2010-03-22 Rafael Espindola <espindola@google.com> 2010-03-22 14:18:24 +00:00
reduced_debug_output.cc Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
reduced_debug_output.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
reloc-types.h
reloc.cc elfcpp/ChangeLog: 2010-08-12 22:01:11 +00:00
reloc.h * gold.cc (queue_middle_gc_tasks): Use a separate blocker for each 2010-02-12 04:33:53 +00:00
resolve.cc 2010-08-12 Cary Coutant <ccoutant@google.com> 2010-08-13 00:18:19 +00:00
script-c.h PR 11855 2010-08-02 13:34:33 +00:00
script-sections.cc 2010-08-03 Ian Lance Taylor <iant@google.com> 2010-08-03 14:07:13 +00:00
script-sections.h * expression.cc (Expression::Expression_eval_info): Add 2010-04-23 04:47:33 +00:00
script.cc elfcpp/ChangeLog: 2010-08-12 22:01:11 +00:00
script.h PR 11855 2010-08-02 13:34:33 +00:00
sparc.cc elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
stringpool.cc * merge.cc (Output_merge_string::do_add_input_section): Count strings 2010-08-03 20:38:09 +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 2010-08-12 Cary Coutant <ccoutant@google.com> 2010-08-13 00:18:19 +00:00
symtab.h elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
target-reloc.h * object.cc (Sized_relobj::do_layout): Defer layout for reloc sections. 2010-06-10 17:20:27 +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 Adjust last patch--same ChangeLog entry, same e-mail. 2010-03-11 01:18:26 +00:00
target.h elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
timer.cc * timer.cc: Only #include <sys/times.h> if HAVE_TIMES is defined. 2010-05-26 00:13:05 +00:00
timer.h 2009-12-17 Rafael Avila de Espindola <espindola@google.com> 2009-12-17 16:02:03 +00:00
tls.h
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 1.10. 2010-08-03 14:29:27 +00:00
workqueue-internal.h
workqueue-threads.cc
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 elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
yyscript.y PR 11855 2010-08-02 13:34:33 +00:00

README

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:
  * MEMORY regions in linker scripts
  * 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 is known to work.  g++ 3.2 and g++
3.4.3 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.