binutils-gdb/gold
Alan Modra ebacd51e16 * layout.cc (Layout::set_segment_offsets): Accept writable .text
segment when omagic.
2013-03-21 04:52:55 +00:00
..
po Regenerate. 2012-11-08 03:03:26 +00:00
testsuite * powerpc.cc (is_branch_reloc): Forward declare. 2013-03-12 22:46:19 +00:00
ChangeLog * layout.cc (Layout::set_segment_offsets): Accept writable .text 2013-03-21 04:52:55 +00:00
Makefile.am Fix mingw gold build with plugins enabled 2013-01-11 14:36:36 +00:00
Makefile.in Fix mingw gold build with plugins enabled 2013-01-11 14:36:36 +00:00
NEWS Add copyright notices 2012-12-17 16:56:12 +00:00
README * README: Update coding style link. 2013-02-06 02:00:30 +00:00
TODO * TODO: New file. 2008-04-03 00:33:37 +00:00
aclocal.m4 * configure.ac (HAVE_ZLIB): Use AM_ZLIB instead of AC_SEARCH_LIBS. 2012-12-07 04:28:52 +00:00
archive.cc * archive.cc (Library_base::should_include_member): Check for 2012-04-17 00:28:41 +00:00
archive.h PR gold/12163 2011-06-02 20:13:23 +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 * arm.cc (Target_arm::attributes_accept_div): New function. 2013-01-09 15:27:24 +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 (Binary_to_elf::sized_convert): Don't crash if the 2011-05-29 17:17:39 +00:00
binary.h Add support for --format binary for input files. 2008-02-08 07:06:58 +00:00
common.cc * arm.cc (Arm_relocate_functions::abs16): Remove unused typedef. 2012-07-11 14:18:40 +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 Fix mingw gold build with plugins enabled 2013-01-11 14:36:36 +00:00
configure Fix mingw gold build with plugins enabled 2013-01-11 14:36:36 +00:00
configure.ac Fix mingw gold build with plugins enabled 2013-01-11 14:36:36 +00:00
configure.tgt Add support for tilegx in gold. 2012-09-15 17:11:28 +00:00
copy-relocs.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
copy-relocs.h * copy-relocs.cc (Copy_relocs::copy_reloc): Call make_copy_reloc 2011-06-08 03:50:12 +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 (Descriptors::close_all): New function. 2013-02-11 16:12:59 +00:00
descriptors.h * descriptors.cc (Descriptors::close_all): New function. 2013-02-11 16:12:59 +00:00
dirsearch.cc 2011-11-17 Sterling Augustine <saugustine@google.com> 2011-11-17 17:46:54 +00:00
dirsearch.h 2011-11-17 Sterling Augustine <saugustine@google.com> 2011-11-17 17:46:54 +00:00
dwarf_reader.cc Add dwp support for v2 DWARF package file format. 2013-03-01 23:05:27 +00:00
dwarf_reader.h Add dwp support for v2 DWARF package file format. 2013-03-01 23:05:27 +00:00
dwp.cc * dwp.cc (Dwp_output_file::add_contribution): Avoid signed/unsigned 2013-03-21 02:00:16 +00:00
dwp.h gold/ 2012-10-24 02:26:39 +00:00
dynobj.cc * dynobj.cc (Sized_dynobj::do_get_global_symbol_counts): Call 2012-06-04 20:00:31 +00:00
dynobj.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
ehframe.cc * ehframe.h (Post_fdes) Make it a vector of Post_fde rather than 2013-03-07 23:27:53 +00:00
ehframe.h * ehframe.h (Post_fdes) Make it a vector of Post_fde rather than 2013-03-07 23:27:53 +00:00
errors.cc * common.cc (Symbol_table::do_allocate_commons_list): Call 2011-06-08 04:43:28 +00:00
errors.h * common.cc (Symbol_table::do_allocate_commons_list): Call 2011-06-08 04:43:28 +00:00
expression.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
ffsll.c * ffsll.c (ffsll): Correct implementation. 2009-03-30 23:17:11 +00:00
fileread.cc gold/ 2012-12-10 17:38:42 +00:00
fileread.h gold/ 2012-10-23 21:29:20 +00:00
freebsd.h * configure.ac (ENABLE_GOLD): Consider *-*-nacl* targets ELF. 2012-05-02 21:37:24 +00:00
ftruncate.c Add copyright notices 2012-12-17 16:56:12 +00:00
gc.cc 2009-01-20 Sriraman Tallam <tmsriram@google.com> 2009-01-28 02:25:33 +00:00
gc.h * gc.h (gc_process_relocs): Don't look through function descriptors. 2013-03-15 07:51:32 +00:00
gdb-index.cc Add dwp support for v2 DWARF package file format. 2013-03-01 23:05:27 +00:00
gdb-index.h 2012-09-10 Sterling Augustine <saugustine@google.com> 2012-09-10 19:16:33 +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 * gold.cc (queue_middle_tasks): Move detect_odr_violations.. 2013-03-10 23:08:18 +00:00
gold.h gold/ 2012-10-24 02:26:39 +00:00
i386.cc gold/ 2012-11-02 19:50:36 +00:00
icf.cc * gc.h (gc_process_relocs): Don't look through function descriptors. 2013-03-15 07:51:32 +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 (find_input_containing_global): Replace 2012-04-24 22:05:28 +00:00
incremental.cc gold/ 2012-11-01 22:35:06 +00:00
incremental.h PR gold/14570 2012-09-12 18:29:18 +00:00
int_encoding.cc * int_encoding.cc (read_unsigned_LEB_128): Replaced with inline 2012-01-25 07:34:55 +00:00
int_encoding.h * int_encoding.cc (read_unsigned_LEB_128): Replaced with inline 2012-01-25 07:34:55 +00:00
layout.cc * layout.cc (Layout::set_segment_offsets): Accept writable .text 2013-03-21 04:52:55 +00:00
layout.h * layout.cc (Layout::special_ordering_of_input_section): New 2012-12-21 06:24:31 +00:00
main.cc 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
mapfile.cc * incremental-dump.cc (dump_incremental_inputs): Print dynamic reloc 2011-05-24 21:41:10 +00:00
mapfile.h * incremental-dump.cc (dump_incremental_inputs): Print dynamic reloc 2011-05-24 21:41:10 +00:00
merge.cc * dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info): 2012-02-29 21:22:29 +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
nacl.cc gold/ 2012-11-01 18:16:23 +00:00
nacl.h * configure.ac (ENABLE_GOLD): Consider *-*-nacl* targets ELF. 2012-05-02 21:37:24 +00:00
object.cc * gold.cc (queue_middle_tasks): Move detect_odr_violations.. 2013-03-10 23:08:18 +00:00
object.h * gold.cc (queue_middle_tasks): Move detect_odr_violations.. 2013-03-10 23:08:18 +00:00
options.cc * options.cc (General_options::string_to_object_format): Accept 2013-03-08 22:34:46 +00:00
options.h * options.h (DEFINE_uint64_alias): Define. 2013-02-15 15:44:03 +00:00
output.cc Default text reordering fix with a flag to turn it off. 2013-01-24 18:49:55 +00:00
output.h Default text reordering fix with a flag to turn it off. 2013-01-24 18:49:55 +00:00
parameters.cc * configure.ac (ENABLE_GOLD): Consider *-*-nacl* targets ELF. 2012-05-02 21:37:24 +00:00
parameters.h * gold.cc: Include timer.h. 2011-10-18 00:06:10 +00:00
plugin.cc * descriptors.cc (Descriptors::close_all): New function. 2013-02-11 16:12:59 +00:00
plugin.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
powerpc.cc * powerpc.cc (Target_powerpc::Scan::reloc_needs_plt_for_ifunc): Make 2013-03-15 08:40:49 +00:00
pread.c * pread.c: Include stdio.h. 2009-10-09 23:10:15 +00:00
readsyms.cc * dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info): 2012-02-29 21:22:29 +00:00
readsyms.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
reduced_debug_output.cc elfcpp/ 2012-05-01 22:46:36 +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 * object.h (Sized_relobj_file::emit_relocs): Delete. 2012-09-05 00:34:20 +00:00
reloc.h * arm.cc (Target_arm::do_is_defined_by_abi): Make sym a const 2012-04-26 00:07:21 +00:00
resolve.cc * resolve.cc (Symbol_table::resolve): When merging common symbols, 2012-03-13 16:08:53 +00:00
script-c.h * README: Remove claim that MEMORY is not supported. 2010-09-08 16:10:33 +00:00
script-sections.cc Make linker scripts and section ordering via --section-ordering-file or 2013-01-10 00:18:15 +00:00
script-sections.h PR ld/14265 2012-08-14 08:31:57 +00:00
script.cc 2011-11-17 Sterling Augustine <saugustine@google.com> 2011-11-17 17:46:54 +00:00
script.h PR gold/13023 2011-10-31 22:51:03 +00:00
sparc.cc gold/ 2012-11-01 23:27:00 +00:00
stringpool.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
stringpool.h * symtab.cc (Symbol::versioned_name): New function. 2011-06-28 05:39:45 +00:00
symtab.cc * symtab.h (Symbol::clear_version): New function. 2013-03-20 00:25:28 +00:00
symtab.h * symtab.h (Symbol::clear_version): New function. 2013-03-20 00:25:28 +00:00
system.h gold/ 2012-11-01 22:44:58 +00:00
target-reloc.h gold/ 2012-11-01 23:27:00 +00:00
target-select.cc * configure.ac (ENABLE_GOLD): Consider *-*-nacl* targets ELF. 2012-05-02 21:37:24 +00:00
target-select.h * configure.ac (ENABLE_GOLD): Consider *-*-nacl* targets ELF. 2012-05-02 21:37:24 +00:00
target.cc * target.h (Target::plt_fde_location, do_plt_fde_location): Declare. 2013-02-27 23:11:56 +00:00
target.h * gold.cc (queue_middle_tasks): Move detect_odr_violations.. 2013-03-10 23:08:18 +00:00
tilegx.cc gold/ 2012-11-01 23:27:00 +00:00
timer.cc * timer.cc: #include <unistd.h>. 2012-04-06 17:21:55 +00:00
timer.h * gold.cc: Include timer.h. 2011-10-18 00:06:10 +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 Update gold copyright year to 2013 2013-01-02 18:39:21 +00:00
workqueue-internal.h * workqueue-internal.h (Workqueue_threader::should_cancel_thread): 2011-07-28 23:25:06 +00:00
workqueue-threads.cc * workqueue-internal.h (Workqueue_threader::should_cancel_thread): 2011-07-28 23:25:06 +00:00
workqueue.cc * workqueue-internal.h (Workqueue_threader::should_cancel_thread): 2011-07-28 23:25:06 +00:00
workqueue.h * workqueue-internal.h (Workqueue_threader::should_cancel_thread): 2011-07-28 23:25:06 +00:00
x86_64.cc Fix TLS to LE optimization for x32 2012-11-20 05:56:06 +00:00
yyscript.y 2011-11-11 Sterling Augustine <saugustine@google.com> 2011-11-11 22:29:43 +00:00

README

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

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++/manual/source_code_style.html
    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.


Copyright (C) 2012 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.