darling-gdb/gold
Doug Kwan a6d1ef576a 2009-11-25 Doug Kwan <dougkwan@google.com>
Revert:

	2009-11-25  Doug Kwan  <dougkwan@google.com>

		* arm.cc (Target_arm::Target_arm): Move method definition
		outside of class definition.  Add code to handle
		--target1-rel, --target1-abs and --target2= options.
		(Target_arm::get_reloc_reloc_type): Change method to be
		non-static and const.
		(Target_arm::target1_is_rel_, Target_arm::target2_reloc_):
		New data member declaration.
		(Target_arm::Scan::local, Target_arm::Scan::global,
		Target_arm::Relocate::relocate,
		Target_arm::Relocatable_size_for_reloc::get_size_for_reloc):
		Adjust call to Target_arm::get_real_reloc_type.
		(Target_arm::get_real_reloc_type): Use command line options
		to determine real types of R_ARM_TARGET1 and R_ARM_TARGET2.
		* options.h (--target1-rel, --target1-abs, --target2): New
		ARM-only options.
2009-11-25 08:08:45 +00:00
..
po PR 10895 2009-11-03 15:20:30 +00:00
testsuite Include "config.h". 2009-11-09 16:11:34 +00:00
aclocal.m4 Regenerate tree using Autoconf 2.64 and Automake 1.11. 2009-08-22 16:56:56 +00:00
archive.cc 2009-10-10 Chris Demetriou <cgd@google.com> 2009-10-10 07:39:04 +00:00
archive.h 2009-05-19 Doug Kwan <dougkwan@google.com> 2009-05-19 22:14:17 +00:00
arm.cc 2009-11-25 Doug Kwan <dougkwan@google.com> 2009-11-25 08:08:45 +00:00
binary.cc
binary.h
ChangeLog 2009-11-25 Doug Kwan <dougkwan@google.com> 2009-11-25 08:08:45 +00:00
common.cc * layout.cc (Layout::get_output_section): Add is_interp and 2009-11-04 15:56:03 +00:00
common.h
compressed_output.cc
compressed_output.h
config.in * configure.ac: Check for (struct stat)::st_mtim 2009-11-06 15:47:06 +00:00
configure * configure.ac: Check for (struct stat)::st_mtim 2009-11-06 15:47:06 +00:00
configure.ac * configure.ac: Check for (struct stat)::st_mtim 2009-11-06 15:47:06 +00:00
configure.tgt 2009-05-28 Doug Kwan <dougkwan@google.com> 2009-05-29 00:15:12 +00:00
copy-relocs.cc * layout.cc (Layout::get_output_section): Add is_interp and 2009-11-04 15:56:03 +00:00
copy-relocs.h
cref.cc
cref.h
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 * 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.h
dwarf_reader.cc * dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info): 2009-10-09 23:05:21 +00:00
dwarf_reader.h * dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info): 2009-10-09 23:05:21 +00:00
dynobj.cc 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 19:11:32 +00:00
dynobj.h 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 19:11:32 +00:00
ehframe.cc
ehframe.h
errors.cc 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
errors.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
expression.cc 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 18:56:07 +00:00
ffsll.c * ffsll.c (ffsll): Correct implementation. 2009-03-30 23:17:11 +00:00
fileread.cc * configure.ac: Check for (struct stat)::st_mtim 2009-11-06 15:47:06 +00:00
fileread.h * fileread.cc: (File_read::View::~View): Use the new 2009-10-28 00:42:34 +00:00
freebsd.h * freebsd.h (Target_freebsd::do_adjust_elf_header): Use size 2009-07-01 16:21:36 +00:00
ftruncate.c * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
gc.cc
gc.h * object.h (class Relobj): Drop options parameter from 2009-10-29 05:16:23 +00:00
gold-threads.cc * target-select.cc (instantiate_target): Don't acquire the lock if 2009-03-24 17:32:43 +00:00
gold-threads.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
gold.cc * object.h (class Relobj): Drop options parameter from 2009-10-29 05:16:23 +00:00
gold.h 2009-10-21 Doug Kwan <dougkwan@google.com> 2009-10-21 08:08:41 +00:00
i386.cc 2009-11-10 Doug Kwan <dougkwan@google.com> 2009-11-09 23:07:30 +00:00
icf.cc * gc.h (gc_process_relocs): Check if icf is enabled using new 2009-10-13 21:17:43 +00:00
icf.h Sriraman Tallam <tmsriram@google.com> 2009-08-12 19:03:16 +00:00
incremental-dump.cc 2009-11-24 Rafael Avila de Espindola <espindola@google.com> 2009-11-25 00:10:05 +00:00
incremental.cc 2009-11-24 Rafael Avila de Espindola <espindola@google.com> 2009-11-25 00:10:05 +00:00
incremental.h 2009-11-24 Rafael Avila de Espindola <espindola@google.com> 2009-11-25 00:10:05 +00:00
layout.cc PR 10880 2009-11-05 06:24:39 +00:00
layout.h * layout.cc (Layout::get_output_section): Add is_interp and 2009-11-04 15:56:03 +00:00
main.cc * gc.h (gc_process_relocs): Check if icf is enabled using new 2009-10-13 21:17:43 +00:00
Makefile.am 2009-11-24 Rafael Avila de Espindola <espindola@google.com> 2009-11-25 00:10:05 +00:00
Makefile.in 2009-11-24 Rafael Avila de Espindola <espindola@google.com> 2009-11-25 00:10:05 +00:00
mapfile.cc
mapfile.h
merge.cc * merge.cc (Object_merge_map::initialize_input_to_output_map): 2009-07-09 23:29:55 +00:00
merge.h 2009-10-09 Doug Kwan <dougkwan@google.com> 2009-10-09 23:18:19 +00:00
mremap.c * ffsll.c: New file. 2009-03-28 05:22:30 +00:00
NEWS
object.cc 2009-11-10 Doug Kwan <dougkwan@google.com> 2009-11-09 23:07:30 +00:00
object.h PR 10880 2009-11-05 06:24:39 +00:00
options.cc Add support for -pie. 2009-10-14 05:25:02 +00:00
options.h 2009-11-25 Doug Kwan <dougkwan@google.com> 2009-11-25 08:08:45 +00:00
output.cc Remove debugging code accidentally included in last commit. 2009-11-05 19:56:41 +00:00
output.h * layout.cc (Layout::get_output_section): Add is_interp and 2009-11-04 15:56:03 +00:00
parameters.cc * object.h (class Object): Remove target_ field, and target, 2009-09-30 22:21:13 +00:00
parameters.h * object.h (class Object): Remove target_ field, and target, 2009-09-30 22:21:13 +00:00
plugin.cc * plugin.h (Plugin::Plugin): Initialize cleanup_done_. 2009-10-28 18:07:25 +00:00
plugin.h * plugin.h (Plugin::Plugin): Initialize cleanup_done_. 2009-10-28 18:07:25 +00:00
powerpc.cc PR 10887 2009-11-04 16:35:51 +00:00
pread.c * pread.c: Include stdio.h. 2009-10-09 23:10:15 +00:00
README Add support for -pie. 2009-10-14 05:25:02 +00:00
readsyms.cc 2009-10-10 Chris Demetriou <cgd@google.com> 2009-10-10 07:39:04 +00:00
readsyms.h
reduced_debug_output.cc
reduced_debug_output.h
reloc-types.h
reloc.cc PR 10925 2009-11-09 02:02:01 +00:00
reloc.h * object.h (class Relobj): Drop options parameter from 2009-10-29 05:16:23 +00:00
resolve.cc PR 10860 2009-11-04 01:24:41 +00:00
script-c.h 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 18:56:07 +00:00
script-sections.cc * layout.cc (Layout::get_output_section): Add is_interp and 2009-11-04 15:56:03 +00:00
script-sections.h 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 18:56:07 +00:00
script.cc 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 18:56:07 +00:00
script.h * fileread.cc (File_read::get_mtime): New method. 2009-07-06 23:11:21 +00:00
sparc.cc PR 10887 2009-11-04 16:35:51 +00:00
stringpool.cc 2009-10-21 Doug Kwan <dougkwan@google.com> 2009-10-21 08:08:41 +00:00
stringpool.h PR 10133 2009-06-23 07:04:10 +00:00
symtab.cc PR 10880 2009-11-05 06:24:39 +00:00
symtab.h PR 10860 2009-11-04 01:24:41 +00:00
target-reloc.h * object.h (class Relobj): Drop options parameter from 2009-10-29 05:16:23 +00:00
target-select.cc * target-select.cc (instantiate_target): Don't acquire the lock if 2009-03-24 17:32:43 +00:00
target-select.h 2009-03-23 Ian Lance Taylor <iant@google.com> 2009-03-24 04:50:32 +00:00
target.cc 2009-10-09 Doug Kwan <dougkwan@google.com> 2009-10-09 23:18:19 +00:00
target.h 2009-10-30 Doug Kwan <dougkwan@google.com> 2009-10-30 18:49:59 +00:00
tls.h
TODO
token.h
version.cc
workqueue-internal.h
workqueue-threads.cc
workqueue.cc
workqueue.h
x86_64.cc 2009-11-10 Doug Kwan <dougkwan@google.com> 2009-11-09 23:07:30 +00:00
yyscript.y 2009-10-16 Doug Kwan <dougkwan@google.com> 2009-10-16 18:56:07 +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:
  * 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.