binutils-gdb/gold
Ian Lance Taylor 031cdbed18 PR 9918
* target-reloc.h (relocate_section): Pass output_section to
	relocate.
	* i386.cc (Target_i386::should_apply_static_reloc): Add
	output_section parameter.  Change all callers.
	(Target_i386::Relocate::relocate): Add output_section parameter.
	* x86_64.cc (Target_x86_64::Relocate::relocate): Likewise.
	* sparc.cc (Target_sparc::Relocate::relocate): Likewise.
	* powerpc.cc (Target_powerpc::Relocate::relocate): Likewise.
	* testsuite/two_file_shared.sh: New script.
	* testsuite/Makefile.am (check_SCRIPTS): Add two_file_shared.sh.
	(check_DATA): Add two_file_shared.dbg.
	(two_file_shared.dbg): New target.
	* testsuite/Makefile.in: Rebuild.
2009-03-04 06:46:27 +00:00
..
po Set LC_ALL=C rather than unsetting LC_COLLATE for sort. 2008-08-04 06:55:33 +00:00
testsuite PR 9918 2009-03-04 06:46:27 +00:00
ChangeLog PR 9918 2009-03-04 06:46:27 +00:00
Makefile.am 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
Makefile.in * layout.cc (Layout::choose_output_section): Don't rename sections 2009-02-25 19:05:21 +00:00
NEWS * NEWS: New file. 2008-03-25 21:55:29 +00:00
README * README: --gc-sections and map files are now supported. Document 2009-02-28 18:08:30 +00:00
TODO * TODO: New file. 2008-04-03 00:33:37 +00:00
aclocal.m4 bfd/ 2008-04-23 16:11:47 +00:00
archive.cc (From Rafael Espindola) 2009-02-13 19:04:45 +00:00
archive.h Add plugin functionality for link-time optimization (LTO). 2008-09-19 22:54:57 +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 * mapfile.cc: New file. 2008-05-21 21:37:44 +00:00
common.h * mapfile.cc: New file. 2008-05-21 21:37:44 +00:00
compressed_output.cc * compressed_output.h (class Output_compressed_section): Use 2008-04-03 14:18:37 +00:00
compressed_output.h * compressed_output.h (class Output_compressed_section): Use 2008-04-03 14:18:37 +00:00
config.in elfcpp:/ 2009-03-02 02:45:29 +00:00
configure elfcpp:/ 2009-03-02 02:45:29 +00:00
configure.ac elfcpp:/ 2009-03-02 02:45:29 +00:00
configure.tgt * configure.tgt (powerpc64-*): Fix targ_obj. 2009-01-19 19:55:26 +00:00
copy-relocs.cc Handle output sections with more than 0x7fffffff bytes. 2008-07-10 23:01:20 +00:00
copy-relocs.h Handle output sections with more than 0x7fffffff bytes. 2008-07-10 23:01:20 +00:00
cref.cc * cref.cc: New file. 2008-07-22 22:08:43 +00:00
cref.h * cref.cc: New file. 2008-07-22 22:08:43 +00:00
debug.h PR gold/5986 2008-03-26 23:36:46 +00:00
defstd.cc Fully implement the SECTIONS clause. 2008-02-04 05:43:05 +00:00
defstd.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
descriptors.cc PR 5990 2009-02-28 03:05:08 +00:00
descriptors.h PR 5990 2009-02-28 03:05:08 +00:00
dirsearch.cc Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
dirsearch.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
dwarf_reader.cc elfcpp/: 2008-05-28 20:48:16 +00:00
dwarf_reader.h elfcpp/: 2008-05-28 20:48:16 +00:00
dynobj.cc (From Rafael Espindola) 2009-02-13 19:04:45 +00:00
dynobj.h (From Rafael Espindola) 2009-02-13 19:04:45 +00:00
ehframe.cc PR 6048 2008-07-24 21:23:09 +00:00
ehframe.h * mapfile.cc: New file. 2008-05-21 21:37:44 +00:00
errors.cc 2009-02-06 Chris Demetriou <cgd@google.com> 2009-02-06 19:20:10 +00:00
errors.h 2009-02-06 Chris Demetriou <cgd@google.com> 2009-02-06 19:20:10 +00:00
expression.cc Permit scripts to refer to the addresses of output sections which were 2008-02-29 00:04:06 +00:00
fileread.cc PR 6811 2009-02-28 04:39:57 +00:00
fileread.h PR 6811 2009-02-28 04:39:57 +00:00
gc.cc 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
gc.h 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
gold-threads.cc Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
gold-threads.h PR 5990 2008-07-25 04:25:49 +00:00
gold.cc 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
gold.h 2009-02-06 Chris Demetriou <cgd@google.com> 2009-02-06 19:20:10 +00:00
i386.cc PR 9918 2009-03-04 06:46:27 +00:00
layout.cc * layout.cc (Layout::find_or_add_kept_section): New function. 2009-03-01 22:22:02 +00:00
layout.h * layout.cc (Layout::find_or_add_kept_section): New function. 2009-03-01 22:22:02 +00:00
main.cc 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
mapfile.cc * mapfile.cc (Mapfile::print_input_section): Change -1U to -1ULL. 2008-09-29 21:10:26 +00:00
mapfile.h 2008-08-06 Cary Coutant <ccoutant@google.com> 2008-08-07 17:02:11 +00:00
merge.cc * merge.cc (Object_merge_map::get_output_offset): Remove inline 2008-04-08 18:46:43 +00:00
merge.h Handle output sections with more than 0x7fffffff bytes. 2008-07-10 23:01:20 +00:00
object.cc * layout.cc (Layout::find_or_add_kept_section): New function. 2009-03-01 22:22:02 +00:00
object.h * layout.cc (Layout::find_or_add_kept_section): New function. 2009-03-01 22:22:02 +00:00
options.cc PR 6811 2009-02-28 04:39:57 +00:00
options.h PR 6811 2009-02-28 04:39:57 +00:00
output.cc PR 7091 2009-02-28 00:12:26 +00:00
output.h PR 7091 2009-02-28 00:12:26 +00:00
parameters.cc Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
parameters.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
plugin.cc * layout.cc (Layout::find_or_add_kept_section): New function. 2009-03-01 22:22:02 +00:00
plugin.h (From Rafael Espindola) 2009-02-13 19:04:45 +00:00
powerpc.cc PR 9918 2009-03-04 06:46:27 +00:00
pread.c Rework File_read interface. Get file size. Use pread when 2007-09-25 06:43:17 +00:00
readsyms.cc (From Rafael Espindola) 2009-02-13 19:04:45 +00:00
readsyms.h * mapfile.cc: New file. 2008-05-21 21:37:44 +00:00
reduced_debug_output.cc * gold.h: Include <cstring> and <stdint.h>. 2009-01-28 20:09:18 +00:00
reduced_debug_output.h PR 9812 2009-02-04 15:18:51 +00:00
reloc-types.h * copy-relocs.cc: New file. 2008-04-16 22:54:29 +00:00
reloc.cc PR 9918 2009-03-04 06:46:27 +00:00
reloc.h 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
resolve.cc PR 9836 2009-02-27 19:57:46 +00:00
script-c.h * layout.cc (Layout::attach_allocated_section_to_segment): Don't 2008-08-13 07:37:46 +00:00
script-sections.cc * layout.cc (Layout::attach_allocated_section_to_segment): Don't 2008-08-13 07:37:46 +00:00
script-sections.h * layout.cc (Layout::attach_allocated_section_to_segment): Don't 2008-08-13 07:37:46 +00:00
script.cc * script.cc (Lazy_demangler): New class. 2009-02-01 00:45:28 +00:00
script.h * options.cc (General_options::parse_dynamic_list): New function. 2008-11-06 07:23:31 +00:00
sparc.cc PR 9918 2009-03-04 06:46:27 +00:00
stringpool.cc * stringpool.cc (Stringpool_template::add_with_length): Set key to 2008-07-24 07:23:20 +00:00
stringpool.h * stringpool.cc (Stringpool_template::add_with_length): Set key to 2008-07-24 07:23:20 +00:00
symtab.cc PR 6992 2009-02-28 17:53:16 +00:00
symtab.h PR 6811 2009-02-28 04:39:57 +00:00
target-reloc.h PR 9918 2009-03-04 06:46:27 +00:00
target-select.cc PR gold/5986 2008-03-26 23:36:46 +00:00
target-select.h * options.cc (options::help): Print list of supported targets. 2008-03-25 21:39:01 +00:00
target.h 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
tls.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
token.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
version.cc * version.cc (version_string): Bump to 1.8. 2009-01-28 20:18:11 +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 Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
workqueue.h Update copyright years. Update language files. 2008-03-13 21:04:21 +00:00
x86_64.cc PR 9918 2009-03-04 06:46:27 +00:00
yyscript.y PR 7088 2008-12-09 16:09:32 +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)
  * position independent executables (-pie)
  * 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.