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mirror of https://sourceware.org/git/binutils-gdb.git synced 2024-12-15 04:31:49 +08:00
binutils-gdb/gold
Cary Coutant e0c5278066 * archive.cc (Library_base::should_include_member): Move
method here from class Archive.
	(Archive::Archive): Initialize base class.
	(Archive::should_include_member): Move to base class.
	(Archive::do_for_all_unused_symbols): New function.
	(Add_archive_symbols::run): Remove redundant access to
	incremental_inputs.
	(Lib_group::Lib_group): Initialize base class.
	(Lib_group::do_filename): New function.
	(Lib_group::include_member): Pass pointer to Lib_group to
	report_object.
	(Lib_group::do_for_all_unused_symbols): New function.
	(Add_lib_group_symbols::run): Report archive information for
	incremental links.
	* archive.h (class Library_base): New base class.
	(class Archive): Derive from Library_base.
	(Archive::filename): Move to base class.
	(Archive::set_incremental_info): Likewise.
	(Archive::incremental_info): Likewise.
	(Archive::Should_include): Likewise.
	(Archive::should_include_member): Likewise.
	(Archive::Armap_entry): Remove.
	(Archive::Unused_symbol_iterator): Remove.
	(Archive::unused_symbols_begin): Remove.
	(Archive::unused_symbols_end): Remove.
	(Archive::do_filename): New function.
	(Archive::do_get_mtime): New function.
	(Archive::do_for_all_unused_symbols): New function.
	(Archive::task_): Move to base class.
	(Archive::incremental_info_): Likewise.
	(class Lib_group): Derive from Library_base.
	(Lib_group::do_filename): New function.
	(Lib_group::do_get_mtime): New function.
	(Lib_group::do_for_all_unused_symbols): New function.
	(Lib_group::task_): Move to base class.
	* dynobj.cc (Sized_dynobj::do_for_all_global_symbols): New
	function.
	* dynobj.h (Sized_dynobj::do_for_all_global_symbols): New
	function.
	* incremental.cc (Incremental_inputs::report_archive_begin):
	Use Library_base; call library's get_mtime; add incremental inputs
	entry before members.
	(class Unused_symbol_visitor): New class.
	(Incremental_inputs::report_archive_end): Use Library_base; use
	visitor class to record unused symbols; don't add incremental inputs
	entry after members.
	(Incremental_inputs::report_object): Use Library_base.
	* incremental.h
	(Incremental_archive_entry::Incremental_archive_entry): Remove
	unused Archive parameter.
	(Incremental_inputs::report_archive_begin): Use Library_base.
	(Incremental_inputs::report_archive_end): Likewise.
	(Incremental_inputs::report_object): Likewise.
	* object.cc (Sized_relobj::do_for_all_global_symbols): New
	function.
	* object.h (Object::for_all_global_symbols): New function.
	(Object::do_for_all_global_symbols): New function.
	(Sized_relobj::do_for_all_global_symbols): New function.
	* plugin.cc (Sized_pluginobj::do_for_all_global_symbols):  New
	function.
	* plugin.h (Sized_pluginobj::do_for_all_global_symbols):  New
	function.
2011-03-30 01:31:57 +00:00
..
po
testsuite * testsuite/Makefile.am (final_layout.stdout): Use -n option with nm. 2011-03-25 22:58:49 +00:00
aclocal.m4
archive.cc * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
archive.h * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +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 Fix typos in gold. 2010-12-14 19:03:30 +00:00
attributes.cc
attributes.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
binary.cc
binary.h
ChangeLog * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
common.cc
common.h
compressed_output.cc
compressed_output.h
config.in
configure * configure.ac: Add check for gnu_indirect_function support in 2011-03-02 14:51:42 +00:00
configure.ac * configure.ac: Add check for gnu_indirect_function support in 2011-03-02 14:51:42 +00:00
configure.tgt
copy-relocs.cc
copy-relocs.h
cref.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
cref.h
debug.h
defstd.cc
defstd.h
descriptors.cc
descriptors.h
dirsearch.cc
dirsearch.h
dwarf_reader.cc * dwarf_reader.cc (Sized_dwarf_line_info): Include all lines, 2011-03-10 01:31:33 +00:00
dwarf_reader.h * dwarf_reader.cc (Sized_dwarf_line_info): Include all lines, 2011-03-10 01:31:33 +00:00
dynobj.cc * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
dynobj.h * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
ehframe.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
ehframe.h
errors.cc
errors.h
expression.cc
ffsll.c
fileread.cc * fileread.cc (File_read::clear_views): Don't delete the whole 2011-03-10 01:10:19 +00:00
fileread.h PR gold/12525 2011-03-09 01:50:33 +00:00
freebsd.h
ftruncate.c
gc.cc
gc.h
gold-threads.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
gold-threads.h
gold.cc
gold.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
i386.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
icf.cc 2011-02-02 Sriraman Tallam <tmsriram@google.com> 2011-02-02 21:55:29 +00:00
icf.h 2011-02-02 Sriraman Tallam <tmsriram@google.com> 2011-02-02 21:55:29 +00:00
incremental-dump.cc
incremental.cc * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
incremental.h * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
int_encoding.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
int_encoding.h
layout.cc * layout.cc (Layout::layout_eh_frame): Mark a writable .eh_frame 2011-01-10 21:57:31 +00:00
layout.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
main.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
Makefile.am
Makefile.in
mapfile.cc
mapfile.h
merge.cc
merge.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
mremap.c
NEWS
object.cc * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
object.h * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
options.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
options.h PR gold/12525 2011-03-07 22:51:39 +00:00
output.cc 2011-02-11 Sriraman Tallam <tmsriram@google.com> 2011-02-12 03:19:24 +00:00
output.h * output.h (Output_data_reloc::add_output_section): Pass OD instead 2010-12-23 19:56:14 +00:00
parameters.cc
parameters.h
plugin.cc * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
plugin.h * archive.cc (Library_base::should_include_member): Move 2011-03-30 01:31:57 +00:00
powerpc.cc
pread.c
README
readsyms.cc * plugin.cc (class Plugin_rescan): Define new class. 2011-01-24 21:48:40 +00:00
readsyms.h * plugin.cc (class Plugin_rescan): Define new class. 2011-01-24 21:48:40 +00:00
reduced_debug_output.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
reduced_debug_output.h
reloc-types.h
reloc.cc PR gold/12316 2011-02-10 01:12:37 +00:00
reloc.h
resolve.cc
script-c.h
script-sections.cc * script-sections.cc (Sort_output_sections::script_compare): 2011-03-14 15:22:16 +00:00
script-sections.h
script.cc * script.cc (script_add_extern): Rewrite to use 2011-01-25 18:55:24 +00:00
script.h
sparc.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
stringpool.cc
stringpool.h
symtab.cc * dwarf_reader.cc (Sized_dwarf_line_info): Include all lines, 2011-03-10 01:31:33 +00:00
symtab.h * dwarf_reader.cc (Sized_dwarf_line_info): Include all lines, 2011-03-10 01:31:33 +00:00
target-reloc.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
target-select.cc
target-select.h
target.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
target.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
timer.cc Fix typos in gold. 2010-12-14 19:03:30 +00:00
timer.h Fix typos in gold. 2010-12-14 19:03:30 +00:00
tls.h
TODO
token.h
version.cc * version.cc (version_string): Bump to 1.11. 2011-01-24 22:27:55 +00:00
workqueue-internal.h
workqueue-threads.cc
workqueue.cc
workqueue.h
x86_64.cc PR gold/12324 2010-12-15 15:35:27 +00:00
yyscript.y

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++/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 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.