binutils-gdb/gold
Nick Clifton 3e01a7fd46 Updated Spanish translations. 2010-05-05 15:28:26 +00:00
..
po Updated Spanish translations. 2010-05-05 15:28:26 +00:00
testsuite 2010-04-23 Sriraman Tallam <tmsriram@google.com> 2010-04-23 18:49:23 +00:00
ChangeLog Updated Spanish translations. 2010-05-05 15:28:26 +00:00
Makefile.am Properly install gold/ld as default cross linker. 2010-04-27 16:05:54 +00:00
Makefile.in Properly install gold/ld as default cross linker. 2010-04-27 16:05:54 +00:00
NEWS * NEWS: New file. 2008-03-25 21:55:29 +00:00
README Add support for -pie. 2009-10-14 05:25:02 +00:00
TODO * TODO: New file. 2008-04-03 00:33:37 +00:00
aclocal.m4 Regenerate tree using Autoconf 2.64 and Automake 1.11. 2009-08-22 16:56:56 +00:00
archive.cc * archive.cc (include_member): Destroy Read_symbols_data object before 2010-04-07 22:58:23 +00:00
archive.h 2010-03-22 Rafael Espindola <espindola@google.com> 2010-03-22 14:18:24 +00:00
arm-reloc-property.cc 2010-02-04 Doug Kwan <dougkwan@google.com> 2010-02-05 00:30:35 +00:00
arm-reloc-property.h 2010-02-03 Doug Kwan <dougkwan@google.com> 2010-02-04 03:32:18 +00:00
arm-reloc.def 2010-02-18 Doug Kwan <dougkwan@google.com> 2010-02-19 22:53:54 +00:00
arm.cc 2010-04-15 Andrew Haley <aph@redhat.com> 2010-04-21 16:32:31 +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 Add support for --format binary for input files. 2008-02-08 07:06:58 +00:00
common.cc * gold.cc (queue_middle_gc_tasks): Use a separate blocker for each 2010-02-12 04:33:53 +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 Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
compressed_output.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +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: 2010-04-27 14:12:32 +00:00
configure.tgt 2010-02-02 Doug Kwan <dougkwan@google.com> 2010-02-03 05:36:55 +00:00
copy-relocs.cc Update copyright notice. 2010-02-11 07:29:31 +00:00
copy-relocs.h Handle output sections with more than 0x7fffffff bytes. 2008-07-10 23:01:20 +00:00
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 Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
descriptors.cc * descriptor.cc: Include <cstdio> and "binary-io.h". 2009-10-10 04:56:43 +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 Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
dwarf_reader.h 2009-12-08 Doug Kwan <dougkwan@google.com> 2009-12-09 03:02:28 +00:00
dynobj.cc 2010-03-22 Rafael Espindola <espindola@google.com> 2010-03-22 14:18:24 +00:00
dynobj.h 2010-03-22 Rafael Espindola <espindola@google.com> 2010-03-22 14:18:24 +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 * fileread.cc (find_or_make_view): Fix comment. 2010-03-24 01:27:57 +00:00
fileread.h * fileread.cc (File_read::~File_read): Don't delete whole_file_view_. 2010-03-10 17:37:11 +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 2010-04-23 Sriraman Tallam <tmsriram@google.com> 2010-04-23 18:49:23 +00:00
gold-threads.cc * gold-threads.h (class Once): Define. 2010-02-12 03:23:26 +00:00
gold-threads.h 2010-02-22 Doug Kwan <dougkwan@google.com> 2010-02-22 18:26:29 +00:00
gold.cc 2010-04-14 Doug Kwan <dougkwan@google.com> 2010-04-15 00:42:15 +00:00
gold.h * gc.h (Garbage_collection::Cident_section_map): New typedef. 2010-01-07 07:14:30 +00:00
i386.cc Adjust last patch--same ChangeLog entry, same e-mail. 2010-03-11 01:18:26 +00:00
icf.cc 2010-04-23 Sriraman Tallam <tmsriram@google.com> 2010-04-23 18:49:23 +00:00
icf.h * i386.cc (Target_i386::can_check_for_function_pointers): New function. 2010-03-04 01:33:22 +00:00
incremental-dump.cc 2009-12-07 Rafael Avila de Espindola <espindola@google.com> 2009-12-07 21:36:52 +00:00
incremental.cc * incremental.cc: Include "libiberty.h". 2010-03-05 22:04:48 +00:00
incremental.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
int_encoding.cc 2009-12-08 Doug Kwan <dougkwan@google.com> 2009-12-09 03:02:28 +00:00
int_encoding.h 2009-12-08 Doug Kwan <dougkwan@google.com> 2009-12-09 03:02:28 +00:00
layout.cc * layout.cc (Layout::layout_reloc): In relocatable link don't 2010-04-24 14:32:23 +00:00
layout.h 2010-04-09 Doug Kwan <dougkwan@google.com> 2010-04-09 17:32:58 +00:00
main.cc 2010-03-22 Rafael Espindola <espindola@google.com> 2010-03-22 14:18:24 +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 2010-04-08 Doug Kwan <dougkwan@google.com> 2010-04-09 00:04:30 +00:00
merge.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
mremap.c * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
object.cc * archive.cc (include_member): Destroy Read_symbols_data object before 2010-04-07 22:58:23 +00:00
object.h * archive.cc (include_member): Destroy Read_symbols_data object before 2010-04-07 22:58:23 +00:00
options.cc 2010-04-07 Doug Kwan <dougkwan@google.com> 2010-04-07 21:42:22 +00:00
options.h 2010-04-15 Andrew Haley <aph@redhat.com> 2010-04-21 16:32:31 +00:00
output.cc 2010-04-09 Doug Kwan <dougkwan@google.com> 2010-04-09 17:32:58 +00:00
output.h * expression.cc (Expression::Expression_eval_info): Add 2010-04-23 04:47:33 +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 gcc PR lto/42757 2010-04-06 21:56:24 +00:00
plugin.h 2010-03-22 Rafael Espindola <espindola@google.com> 2010-03-22 14:18:24 +00:00
powerpc.cc 2010-02-12 Sriraman Tallam <tmsriram@google.com> 2010-02-13 02:04:21 +00:00
pread.c * pread.c: Include stdio.h. 2009-10-09 23:10:15 +00:00
readsyms.cc 2010-03-22 Rafael Espindola <espindola@google.com> 2010-03-22 14:18:24 +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 * copy-relocs.cc: New file. 2008-04-16 22:54:29 +00:00
reloc.cc * reloc.cc (Sized_relobj::split_stack_adjust_reltype): Call the 2010-03-11 01:10:53 +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 2010-02-04 Doug Kwan <dougkwan@google.com> 2010-02-05 00:30:35 +00:00
script-c.h 2010-04-09 Doug Kwan <dougkwan@google.com> 2010-04-09 17:32:58 +00:00
script-sections.cc * expression.cc (Expression::Expression_eval_info): Add 2010-04-23 04:47:33 +00:00
script-sections.h * expression.cc (Expression::Expression_eval_info): Add 2010-04-23 04:47:33 +00:00
script.cc * expression.cc (Expression::Expression_eval_info): Add 2010-04-23 04:47:33 +00:00
script.h * expression.cc (Expression::Expression_eval_info): Add 2010-04-23 04:47:33 +00:00
sparc.cc * sparc.cc (Target_sparc::Scan::local): Accept R_SPARC_WPLT30. 2010-03-10 17:07:26 +00:00
stringpool.cc 2010-03-19 Doug Kwan <dougkwan@google.com> 2010-03-19 19:11:21 +00:00
stringpool.h 2010-03-19 Doug Kwan <dougkwan@google.com> 2010-03-19 19:11:21 +00:00
symtab.cc 2010-04-18 Sriraman Tallam <tmsriram@google.com> 2010-04-20 21:13:30 +00:00
symtab.h 2010-04-18 Sriraman Tallam <tmsriram@google.com> 2010-04-20 21:13:30 +00:00
target-reloc.h 2010-04-18 Sriraman Tallam <tmsriram@google.com> 2010-04-20 21:13:30 +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 2010-04-07 Doug Kwan <dougkwan@google.com> 2010-04-07 21:42:22 +00:00
timer.cc 2009-12-17 Rafael Avila de Espindola <espindola@google.com> 2009-12-17 16:02:03 +00:00
timer.h 2009-12-17 Rafael Avila de Espindola <espindola@google.com> 2009-12-17 16:02:03 +00:00
tls.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
token.h * dirsearch.cc (Dirsearch::initialize): Add all blockers before 2010-02-11 07:42:17 +00:00
version.cc Change to "Copyright 2010" 2010-01-08 19:48:09 +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 2010-04-18 Sriraman Tallam <tmsriram@google.com> 2010-04-20 21:13:30 +00:00
yyscript.y 2010-04-09 Doug Kwan <dougkwan@google.com> 2010-04-09 17:32:58 +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.