binutils-gdb/gold
Cary Coutant fc497986a3 * layout.cc (Layout::set_segment_offsets): Don't try to realign data
segment that has been aligned for relro.
	* output.cc (Output_segment::set_section_addresses): Change signature;
	adjust all callers.  Account for alignment when totalling
	size of relro sections.
	* output.h (Output_segment::set_section_addresses): Change signature.
	* testsuite/Makefile.am (relro_test.sh, relro_test.stdout): New
	targets.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/relro_test.cc: Add alignment attributes to test proper
	alignment of relro sections when padding is necessary.
	* testsuite/relro_test.sh: New script.
2010-10-16 00:37:25 +00:00
..
po
testsuite * layout.cc (Layout::set_segment_offsets): Don't try to realign data 2010-10-16 00:37:25 +00:00
aclocal.m4 * Makefile.in: Rebuild with automake 1.11.1. 2010-08-19 23:42:03 +00:00
archive.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
archive.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
arm-reloc-property.cc
arm-reloc-property.h
arm-reloc.def
arm.cc * arm.cc (Target_arm::Scan::local): Report the unsupported reloc 2010-10-12 19:00:30 +00:00
attributes.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
attributes.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
binary.cc
binary.h
ChangeLog * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
common.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
common.h
compressed_output.cc
compressed_output.h
config.in
configure * script-sections.h (class Script_sections): Make 2010-10-12 19:21:41 +00:00
configure.ac * script-sections.h (class Script_sections): Make 2010-10-12 19:21:41 +00:00
configure.tgt
copy-relocs.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
copy-relocs.h
cref.cc
cref.h
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
descriptors.cc
descriptors.h
dirsearch.cc
dirsearch.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
dwarf_reader.cc
dwarf_reader.h
dynobj.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
dynobj.h PR 11855 2010-08-02 13:34:33 +00:00
ehframe.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
ehframe.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
errors.cc
errors.h
expression.cc * expression.cc (eval): Replace dummy argument with NULL. 2010-10-01 15:02:33 +00:00
ffsll.c
fileread.cc gold/ 2010-10-12 15:30:24 +00:00
fileread.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
freebsd.h
ftruncate.c
gc.cc
gc.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
gold-threads.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
gold-threads.h
gold.cc * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
gold.h
i386.cc 2010-09-28 Sriraman Tallam <tmsriram@google.com> 2010-09-28 17:14:15 +00:00
icf.cc 2010-09-28 Sriraman Tallam <tmsriram@google.com> 2010-09-28 17:14:15 +00:00
icf.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
incremental-dump.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
incremental.cc * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
incremental.h * incremental.h (class Incremental_input_entry): Add virtual 2010-08-27 18:00:58 +00:00
int_encoding.cc
int_encoding.h * arm.cc (Target_arm<big_endian>::gc_process_relocs): Add template 2010-07-29 18:57:28 +00:00
layout.cc * layout.cc (Layout::set_segment_offsets): Don't try to realign data 2010-10-16 00:37:25 +00:00
layout.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
main.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
Makefile.am
Makefile.in * Makefile.in: Rebuild with automake 1.11.1. 2010-08-19 23:42:03 +00:00
mapfile.cc
mapfile.h
merge.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
merge.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
mremap.c
NEWS
object.cc Support building gold with gcc 4.2/4.3. 2010-09-09 19:57:06 +00:00
object.h 2010-09-08 Doug Kwan <dougkwan@google.com> 2010-09-08 23:54:51 +00:00
options.cc * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
options.h * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
output.cc * layout.cc (Layout::set_segment_offsets): Don't try to realign data 2010-10-16 00:37:25 +00:00
output.h * layout.cc (Layout::set_segment_offsets): Don't try to realign data 2010-10-16 00:37:25 +00:00
parameters.cc * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
parameters.h * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
plugin.cc * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
plugin.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
powerpc.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
pread.c
README * README: Remove claim that MEMORY is not supported. 2010-09-08 16:10:33 +00:00
readsyms.cc * gold/archive.h (Add_lib_group_symbols): Add readsyms_blocker_, adjust 2010-08-20 00:35:13 +00:00
readsyms.h
reduced_debug_output.cc
reduced_debug_output.h
reloc-types.h
reloc.cc * debug.h (DEBUG_INCREMENTAL): New flag. 2010-10-14 22:10:22 +00:00
reloc.h
resolve.cc * resolve.cc (symbol_to_bits): Report the value of the unsupported 2010-10-11 20:04:04 +00:00
script-c.h * README: Remove claim that MEMORY is not supported. 2010-09-08 16:10:33 +00:00
script-sections.cc * script-sections.h (class Script_sections): Make 2010-10-12 19:21:41 +00:00
script-sections.h * script-sections.h (class Script_sections): Make 2010-10-12 19:21:41 +00:00
script.cc 2010-09-08 Rafael Espindola <espindola@google.com> 2010-09-08 20:08:14 +00:00
script.h PR 11855 2010-08-02 13:34:33 +00:00
sparc.cc elfcpp/ChangeLog: 2010-08-12 22:15:00 +00:00
stringpool.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
stringpool.h * merge.cc (Output_merge_string::do_add_input_section): Count strings 2010-08-03 20:38:09 +00:00
symtab.cc 2010-10-02 Doug Kwan <dougkwan@google.com> 2010-10-02 09:35:20 +00:00
symtab.h 2010-10-02 Doug Kwan <dougkwan@google.com> 2010-10-02 09:35:20 +00:00
target-reloc.h PR 10893 2010-08-19 22:50:16 +00:00
target-select.cc
target-select.h
target.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
target.h 2010-09-28 Sriraman Tallam <tmsriram@google.com> 2010-09-28 17:14:15 +00:00
timer.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
timer.h * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
tls.h
TODO
token.h
version.cc * archive.cc: Formatting fixes: Remove whitespace between 2010-08-25 08:36:54 +00:00
workqueue-internal.h
workqueue-threads.cc
workqueue.cc
workqueue.h
x86_64.cc 2010-09-28 Sriraman Tallam <tmsriram@google.com> 2010-09-28 17:14:15 +00:00
yyscript.y * README: Remove claim that MEMORY is not supported. 2010-09-08 16:10:33 +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:
  * 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.