binutils-gdb/gold
Sriraman Tallam 28f2a4ac6f Group text sections with prefixes .text.unlikely,.text.hot and .text.startup
by default.


2012-12-18  Sriraman Tallam  <tmsriram@google.com>

	* layout.cc (Layout::is_section_name_prefix_grouped): New function.
	* layout.h (Layout::is_section_name_prefix_grouped): New function.
	* output.cc (Output_section::add_input_section): Check if section
	name contains special prefix.  Keep input sections to sort such
	sections.
	(Output_section::Input_section_sort_section_order_index_compare
	 ::operator()): Group sections according to prefixes.
	* (Output_section::sort_attached_input_sections): Add condition
	to Input_section_entry constructor call.
	* testsuite/Makefile.am (text_section_grouping): New test.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/text_section_grouping.cc: New file.
	* testsuite/text_section_grouping.sh: New file.
2012-12-19 02:55:15 +00:00
..
po Regenerate. 2012-11-08 03:03:26 +00:00
testsuite Group text sections with prefixes .text.unlikely,.text.hot and .text.startup 2012-12-19 02:55:15 +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
arm-reloc-property.cc
arm-reloc-property.h
arm-reloc.def
arm.cc * layout.h (Layout::get_executable_sections): Declare. 2012-12-03 05:30:59 +00:00
attributes.cc
attributes.h
binary.cc
binary.h
ChangeLog Group text sections with prefixes .text.unlikely,.text.hot and .text.startup 2012-12-19 02:55:15 +00:00
common.cc * arm.cc (Arm_relocate_functions::abs16): Remove unused typedef. 2012-07-11 14:18:40 +00:00
common.h
compressed_output.cc
compressed_output.h
config.in * config.in: Disable sanity check for kfreebsd. 2012-09-10 22:30:57 +00:00
configure * configure.ac (HAVE_ZLIB): Use AM_ZLIB instead of AC_SEARCH_LIBS. 2012-12-07 04:28:52 +00:00
configure.ac Add copyright notices 2012-12-17 16:56:12 +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
cref.cc
cref.h
debug.h
defstd.cc
defstd.h
descriptors.cc gold/ 2012-11-01 22:43:26 +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 gold/ 2012-11-01 22:35:06 +00:00
dwarf_reader.h gold/ 2012-10-23 21:41:37 +00:00
dwp.cc gold/ 2012-12-15 00:57:30 +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 * arm.cc (Arm_relocate_functions::abs16): Remove unused typedef. 2012-07-11 14:18:40 +00:00
ehframe.h
errors.cc
errors.h
expression.cc * object.h (Relobj::local_symbol_value): New function. 2011-12-19 21:07:16 +00:00
ffsll.c
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
gc.h * target.h (Target::gc_mark_symbol, do_gc_mark_symbol): New functions. 2012-09-09 03:43:51 +00:00
gdb-index.cc gold/ 2012-10-23 21:41:37 +00:00
gdb-index.h 2012-09-10 Sterling Augustine <saugustine@google.com> 2012-09-10 19:16:33 +00:00
gold-threads.cc
gold-threads.h
gold.cc PR gold/14726 2012-10-17 11:58:39 +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
icf.h
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 Group text sections with prefixes .text.unlikely,.text.hot and .text.startup 2012-12-19 02:55:15 +00:00
layout.h Group text sections with prefixes .text.unlikely,.text.hot and .text.startup 2012-12-19 02:55:15 +00:00
main.cc 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
Makefile.am Add copyright notices 2012-12-17 16:56:12 +00:00
Makefile.in Add copyright notices 2012-12-17 16:56:12 +00:00
mapfile.cc
mapfile.h
merge.cc * dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info): 2012-02-29 21:22:29 +00:00
merge.h
mremap.c
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
NEWS Add copyright notices 2012-12-17 16:56:12 +00:00
object.cc PR gold/14727 2012-10-18 05:36:02 +00:00
object.h gold/ 2012-10-23 21:34:58 +00:00
options.cc * options.cc (General_options::finalize): Disallow -pie and -static. 2012-02-15 00:56:16 +00:00
options.h * options.h (General_options): Add --toc-sort/--no-toc-sort. 2012-12-12 03:41:40 +00:00
output.cc Group text sections with prefixes .text.unlikely,.text.hot and .text.startup 2012-12-19 02:55:15 +00:00
output.h * options.h (General_options): Add --toc-sort/--no-toc-sort. 2012-12-12 03:41:40 +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 Patch adds support to allow plugins to map selected subset of sections to unique 2012-08-24 18:35:35 +00:00
plugin.h 2012-03-21 Cary Coutant <ccoutant@google.com> 2012-03-21 19:02:22 +00:00
powerpc.cc * powerpc.cc (class Track_tls): New. 2012-12-12 08:09:41 +00:00
pread.c
README Add copyright notices 2012-12-17 16:56:12 +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
reduced_debug_output.cc elfcpp/ 2012-05-01 22:46:36 +00:00
reduced_debug_output.h
reloc-types.h
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
script-sections.cc PR ld/14265 2012-08-14 08:31:57 +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
stringpool.h
symtab.cc * target.h (Target::gc_mark_symbol, do_gc_mark_symbol): New functions. 2012-09-09 03:43:51 +00:00
symtab.h * powerpc.cc: Formatting and white space. 2012-08-18 11:12:50 +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 gold: Fix parameterization of do_adjust_elf_header 2012-04-20 22:23:47 +00:00
target.h gold/ 2012-11-01 23:27:00 +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
TODO
token.h
version.cc
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

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++/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.


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.