darling-gdb/gold
David S. Miller a5a5f7a336 gold: Add linker relaxation of tail calls on sparc.
gold/

	* sparc.cc (Target_sparc::Relocate::relax_call): New function.
	(Target_sparc::Relocate::relocate): Call it for R_SPARC_WDISP30
	and R_SPARC_WPLT30.
2012-04-24 22:40:23 +00:00
..
po * po/it.po: New Italian translation. 2011-11-25 09:15:26 +00:00
testsuite gold: Build Gold IFUNC tests with -fPIC/-fPIE instead of -fpic/-fpie. 2012-04-17 02:09:42 +00:00
aclocal.m4 * configure.in (AC_CHECK_FUNCS): Add setlocale. 2012-04-05 08:43:41 +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 2012-03-19 Doug Kwan <dougkwan@google.com> 2012-03-19 23:54:07 +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
ChangeLog gold: Add linker relaxation of tail calls on sparc. 2012-04-24 22:40:23 +00:00
common.cc * common.cc (Symbol_table::do_allocate_commons_list): Call 2011-06-08 04:43:28 +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 binutils/ 2012-04-06 16:49:02 +00:00
configure binutils/ 2012-04-06 16:49:02 +00:00
configure.ac binutils/ 2012-04-06 16:49:02 +00:00
configure.tgt 2010-02-02 Doug Kwan <dougkwan@google.com> 2010-02-03 05:36:55 +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
descriptors.cc * descriptors.cc (set_close_on_exec): New function. 2011-04-22 23:20:28 +00:00
descriptors.h
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 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
dwarf_reader.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
dynobj.cc PR gold/12525 2011-07-02 05:30:00 +00:00
dynobj.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
ehframe.cc PR gold/12525 2011-07-02 00:03:25 +00:00
ehframe.h PR gold/12571 2011-07-01 22:05:01 +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
fileread.cc PR gold/13288 2011-10-17 23:36:43 +00:00
fileread.h * archive.cc (Archive::include_member): Adjust call to 2011-04-12 00:44:48 +00:00
freebsd.h * options.h (class General_options): Add --print-output-format. 2011-07-15 21:43:08 +00:00
ftruncate.c
gc.cc
gc.h * incremental-dump.cc (dump_incremental_inputs): Print dynamic reloc 2011-05-24 21:41:10 +00:00
gdb-index.cc elfcpp/ 2012-04-23 23:31:15 +00:00
gdb-index.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +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 2012-03-19 Doug Kwan <dougkwan@google.com> 2012-03-19 23:54:07 +00:00
gold.h * common.cc (Symbol_table::do_allocate_commons_list): Call 2011-06-08 04:43:28 +00:00
i386.cc PR gold/13617 2012-01-24 06:21:11 +00:00
icf.cc * target.h (Target::can_check_for_function_pointers): Rewrite. 2011-06-28 21:15:42 +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 * incremental-dump.cc (find_input_containing_global): Replace 2012-04-24 22:05:28 +00:00
incremental.h * incremental-dump.cc (find_input_containing_global): Replace 2012-04-24 22:05:28 +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 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
layout.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
main.cc 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
Makefile.am 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
Makefile.in 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
NEWS
object.cc 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
object.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
options.cc * options.cc (General_options::finalize): Disallow -pie and -static. 2012-02-15 00:56:16 +00:00
options.h * archive.cc (Library_base::should_include_member): Check for 2012-04-17 00:28:41 +00:00
output.cc gold: Allow use_plt_offset to be specified for global relocations. 2012-04-17 01:50:39 +00:00
output.h gold: Allow use_plt_offset to be specified for global relocations. 2012-04-17 01:50:39 +00:00
parameters.cc * gold.cc: Include timer.h. 2011-10-18 00:06:10 +00:00
parameters.h * gold.cc: Include timer.h. 2011-10-18 00:06:10 +00:00
plugin.cc 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
plugin.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
powerpc.cc gold: Allow use_plt_offset to be specified for global relocations. 2012-04-17 01:50:39 +00:00
pread.c
README * README: Update compilers known to work and fail. 2010-12-01 16:51:44 +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/ 2012-03-13 00:13:08 +00:00
reduced_debug_output.h Revert -Wshadow changes, all changes from: 2009-12-14 19:53:05 +00:00
reloc-types.h
reloc.cc * layout.cc: Include "object.h". 2011-06-25 00:40:57 +00:00
reloc.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +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 PR gold/13023 2011-10-31 22:51:03 +00:00
script-sections.h * script-sections.h (class Script_sections): Make 2010-10-12 19:21:41 +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: Add linker relaxation of tail calls on sparc. 2012-04-24 22:40:23 +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 * archive.cc (Library_base::should_include_member): Check for 2012-04-17 00:28:41 +00:00
symtab.h 2011-10-31 Sriraman Tallam <tmsriram@google.com> 2011-10-31 21:36:54 +00:00
target-reloc.h Replace <64, false> with <size, big_endian> 2011-12-15 23:29:24 +00:00
target-select.cc * options.h (class General_options): Add --print-output-format. 2011-07-15 21:43:08 +00:00
target-select.h * options.h (class General_options): Add --print-output-format. 2011-07-15 21:43:08 +00:00
target.cc gold: Fix parameterization of do_adjust_elf_header 2012-04-20 22:23:47 +00:00
target.h 2012-03-19 Doug Kwan <dougkwan@google.com> 2012-03-19 23:54:07 +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
TODO
token.h * dirsearch.cc (Dirsearch::initialize): Add all blockers before 2010-02-11 07:42:17 +00:00
version.cc * version.cc (version_string): Bump to 1.11. 2011-01-24 22:27:55 +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 gold: Allow use_plt_offset to be specified for global relocations. 2012-04-17 01:50:39 +00:00
yyscript.y 2011-11-11 Sterling Augustine <saugustine@google.com> 2011-11-11 22:29:43 +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 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.