binutils-gdb/gold
Stephen Crane c4e648430f Add plugin API for processing plugin-added input files
Gold plugins may wish to further process an input file added by a plugin. For
example, the plugin may need to assign a unique segment for sections in a
plugin-generated input file. This patch adds a plugin callback that the linker
will call when reading symbols from a new input file added after the
all_symbols_read event (i.e. an input file added by a plugin).

2017-12-11  Stephen Crane  <sjc@immunant.com>

	* plugin-api.h: Add new plugin hook to allow processing of input
	files added by a plugin.
	(ld_plugin_new_input_handler): New function hook type.
	(ld_plugin_register_new_input): New interface.
	(LDPT_REGISTER_NEW_INPUT_HOOK): New enum val.
	(tv_register_new_input): New member.

	* plugin.cc (Plugin::load): Include hooks for register_new_input
	in transfer vector.
	(Plugin::new_input): New function.
	(register_new_input): New function.
	(Plugin_manager::claim_file): Call Plugin::new_input if in
	replacement phase.
	* plugin.h (Plugin::set_new_input_handler): New function.
	* testsuite/plugin_new_section_layout.c: New plugin to test
	new_input plugin API.
	* testsuite/plugin_final_layout.sh: Add new input test.
	* testsuite/Makefile.am (plugin_layout_new_file): New test case.
	* testsuite/Makefile.in: Regenerate.
2017-12-11 14:58:38 -08:00
..
po Support --localedir, --datarootdir and --datadir 2017-11-29 20:10:52 +10:30
testsuite Add plugin API for processing plugin-added input files 2017-12-11 14:58:38 -08:00
aarch64-reloc-property.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
aarch64-reloc-property.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
aarch64-reloc.def Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
aarch64.cc Fix internal error in fix_errata on aarch64. 2017-11-30 15:08:21 -08:00
aclocal.m4 Regenerate Makefile.in/aclocal.m4 automake 1.11.6 2016-04-15 16:20:55 -07:00
archive.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
archive.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
arm-reloc-property.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
arm-reloc-property.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
arm-reloc.def Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
arm.cc Implement BE8 support for ARM. 2017-10-19 20:53:14 -07:00
attributes.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
attributes.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
binary.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
binary.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
ChangeLog Add plugin API for processing plugin-added input files 2017-12-11 14:58:38 -08:00
ChangeLog-0815 binutils ChangeLog rotation 2016-01-01 22:59:17 +10:30
ChangeLog-2016 ChangeLog rotation 2017-01-02 13:55:05 +10:30
common.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
common.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
compressed_output.cc gold: Add put_ch_reserved to 64-bit Chdr_write 2017-07-28 13:40:01 -07:00
compressed_output.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
config.in Add configure flag to enable gnu hash style by default. 2017-08-08 07:25:39 +09:30
configure Add configure flag to enable gnu hash style by default. 2017-08-08 07:25:39 +09:30
configure.ac Add configure flag to enable gnu hash style by default. 2017-08-08 07:25:39 +09:30
configure.tgt Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
copy-relocs.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
copy-relocs.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
cref.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
cref.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
debug.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
defstd.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
defstd.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
descriptors.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
descriptors.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
dirsearch.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
dirsearch.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
dwarf_reader.cc Fix DWARF reader to use correct size for DW_FORM_ref_addr. 2017-11-19 17:56:30 -08:00
dwarf_reader.h Fix DWARF reader to use correct size for DW_FORM_ref_addr. 2017-11-19 17:56:30 -08:00
dwp.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
dwp.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
dynobj.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
dynobj.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
ehframe.cc [GOLD] PowerPC recreate eh_frame for stubs on each relax pass 2017-08-01 14:08:53 +09:30
ehframe.h [GOLD] PowerPC recreate eh_frame for stubs on each relax pass 2017-08-01 14:08:53 +09:30
errors.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
errors.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
expression.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
ffsll.c Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
fileread.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
fileread.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
freebsd.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
ftruncate.c Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
gc.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
gc.h Improved support for --icf=safe when used with -pie. 2017-02-15 00:37:10 -08:00
gdb-index.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
gdb-index.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
gold-threads.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
gold-threads.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
gold.cc Fix internal error from command line with unbalanced --start-lib/--end-lib. 2017-12-01 12:59:36 -08:00
gold.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
i386.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
icf.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
icf.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
incremental-dump.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
incremental.cc Disallow --incremental with -pie and force -no-pie for incremental tests. 2017-12-01 23:46:03 -08:00
incremental.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
int_encoding.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
int_encoding.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
layout.cc gold: Ignore def/ref from a dynamic object for special symbols 2017-11-08 16:02:50 -08:00
layout.h [GOLD] PowerPC recreate eh_frame for stubs on each relax pass 2017-08-01 14:08:53 +09:30
main.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
Makefile.am Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
Makefile.in Check for export dynamic symbol options when doing symbol resolution in plugins. 2017-09-20 15:45:04 -07:00
mapfile.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
mapfile.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
merge.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
merge.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
mips.cc Gold: Fix mips.cc for GCC 4.2 2017-07-26 10:43:36 -07:00
mremap.c Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
nacl.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
nacl.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
NEWS Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
object.cc Allow multiple .eh_frame sections per object file. 2017-11-28 18:09:41 -08:00
object.h Allow multiple .eh_frame sections per object file. 2017-11-28 18:09:41 -08:00
options.cc Disallow --incremental with -pie and force -no-pie for incremental tests. 2017-12-01 23:46:03 -08:00
options.h Fix localized help string output for -fuse-ld. 2017-12-01 13:45:27 -08:00
output.cc Handle case where posix_fallocate is not supported for a filesystem. 2017-12-02 09:56:40 -08:00
output.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
parameters.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
parameters.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
plugin.cc Add plugin API for processing plugin-added input files 2017-12-11 14:58:38 -08:00
plugin.h Add plugin API for processing plugin-added input files 2017-12-11 14:58:38 -08:00
powerpc.cc Fix symbol values and relocation addends for relocatable links. 2017-11-27 17:32:55 -08:00
pread.c Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
README Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
readsyms.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
readsyms.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
reduced_debug_output.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
reduced_debug_output.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
reloc-types.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
reloc.cc Refactor Sized_relobj_file::do_relocate_sections. 2017-01-10 07:46:43 -08:00
reloc.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
resolve.cc Allow multiply-defined absolute symbols when they have the same value. 2017-11-28 18:48:12 -08:00
s390.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
script-c.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
script-sections.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
script-sections.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
script.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
script.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
sparc.cc Fix incorrect register mask. 2017-09-26 07:33:04 -07:00
stringpool.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
stringpool.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
symtab.cc Fix problem where undef can fail to trigger archive rescan. 2017-12-01 12:10:02 -08:00
symtab.h gold: Ignore def/ref from a dynamic object for special symbols 2017-11-08 16:02:50 -08:00
system.h ngettext support 2017-11-07 15:52:52 +10:30
target-reloc.h Fix symbol values and relocation addends for relocatable links. 2017-11-27 17:32:55 -08:00
target-select.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
target-select.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
target.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
target.h [GOLD] Symbol flag for PowerPC64 localentry:0 tracking 2017-08-28 16:27:33 +09:30
tilegx.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
timer.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
timer.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
tls.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
TODO * TODO: New file. 2008-04-03 00:33:37 +00:00
token.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
version.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
workqueue-internal.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
workqueue-threads.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
workqueue.cc Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
workqueue.h Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30
x86_64.cc Disallow --incremental with -pie and force -no-pie for incremental tests. 2017-12-01 23:46:03 -08:00
yyscript.y Update year range in copyright notice of all files. 2017-01-02 14:08:56 +10:30

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) 2012-2017 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.