binutils-gdb/ld
Alan Modra b751e639fc Early expression evaluation
Folding a constant expression early can lead to loss of tokens, eg.
ABSOLUTE, that are significant in ld's horrible context sensitive
expression evaluation.  Also, MAXPAGESIZE and other "constants" may
not have taken values specified on the command line, leading to the
wrong value being cached.

	* ldexp.c (exp_unop, exp_binop, exp_trinop, exp_nameop): Don't
	fold expression.
	* testsuite/ld-elf/maxpage3b.d: Expect correct maxpagesize.
2016-07-20 10:55:45 +09:30
..
emulparams Support -pie for aarch64*-elf targets. 2016-07-19 10:19:06 -07:00
emultempl Don't include libbfd.h outside of bfd, part 1 2016-07-16 13:25:11 +09:30
po Copyright update for binutils 2016-01-01 23:00:01 +10:30
scripttempl FT32 linker script cleanup 2016-07-06 18:58:10 -07:00
testsuite Early expression evaluation 2016-07-20 10:55:45 +09:30
.gitignore
aclocal.m4 Regenerate Makefile.in/aclocal.m4 automake 1.11.6 2016-04-15 16:20:55 -07:00
ChangeLog Early expression evaluation 2016-07-20 10:55:45 +09:30
ChangeLog-0001 Add copyright notices 2012-12-10 12:48:03 +00:00
ChangeLog-0203 Add copyright notices 2012-12-10 12:48:03 +00:00
ChangeLog-2004 Add copyright notices 2012-12-10 12:48:03 +00:00
ChangeLog-2005 Add copyright notices 2012-12-10 12:48:03 +00:00
ChangeLog-2006 Add copyright notices 2012-12-10 12:48:03 +00:00
ChangeLog-2007 Add copyright notices 2012-12-10 12:48:03 +00:00
ChangeLog-2008 strip off +x bits on non-executable/script files 2013-12-07 02:03:03 -05:00
ChangeLog-2009 Remove trailing spaces in ld 2015-08-12 04:46:43 -07:00
ChangeLog-2010 Add copyright notices 2012-12-10 12:48:03 +00:00
ChangeLog-2011 Add copyright notices 2012-12-10 12:48:03 +00:00
ChangeLog-2012 Rotate binutils ChangeLog for 2013 2013-01-02 17:06:32 +00:00
ChangeLog-2013 New Year - binutils ChangeLog rotation 2014-01-08 05:32:12 -08:00
ChangeLog-2014 ChangeLog rotatation and copyright year update 2015-01-02 00:53:45 +10:30
ChangeLog-2015 binutils ChangeLog rotation 2016-01-01 22:59:17 +10:30
ChangeLog-9197 Remove trailing spaces in ld 2015-08-12 04:46:43 -07:00
ChangeLog-9899 Add copyright notices 2012-12-10 12:48:03 +00:00
config.in ld: Add a linker configure option --enable-relro 2016-06-22 05:37:38 -07:00
configure ld: Add a linker configure option --enable-relro 2016-06-22 05:37:38 -07:00
configure.ac ld: Add a linker configure option --enable-relro 2016-06-22 05:37:38 -07:00
configure.host Copyright update for binutils 2016-01-01 23:00:01 +10:30
configure.tgt ld: Add a linker configure option --enable-relro 2016-06-22 05:37:38 -07:00
deffile.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
deffilep.y Copyright update for binutils 2016-01-01 23:00:01 +10:30
dep-in.sed
elf-hints-local.h Remove trailing white spaces in ld 2013-01-10 20:08:03 +00:00
fdl.texi
gen-doc.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
genscrba.sh
genscripts.sh Copyright update for binutils 2016-01-01 23:00:01 +10:30
h8-doc.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
ld.h Add support for creating ELF import libraries 2016-07-15 17:50:48 +01:00
ld.texinfo Add support for creating ELF import libraries 2016-07-15 17:50:48 +01:00
ldbuildid.c Formatting fixes. 2016-06-14 13:25:21 +09:30
ldbuildid.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldcref.c Formatting fixes. 2016-06-14 13:25:21 +09:30
ldctor.c Formatting fixes. 2016-06-14 13:25:21 +09:30
ldctor.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldemul.c Formatting fixes. 2016-06-14 13:25:21 +09:30
ldemul.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldexp.c Early expression evaluation 2016-07-20 10:55:45 +09:30
ldexp.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldfile.c Formatting fixes. 2016-06-14 13:25:21 +09:30
ldfile.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldgram.y Add new NOCROSSREFS_TO linker script command 2016-04-18 12:45:46 +01:00
ldint.texinfo Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldlang.c Don't include libbfd.h outside of bfd, part 4 2016-07-16 13:29:35 +09:30
ldlang.h Add new NOCROSSREFS_TO linker script command 2016-04-18 12:45:46 +01:00
ldlex-wrapper.c Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldlex.h Add support for creating ELF import libraries 2016-07-15 17:50:48 +01:00
ldlex.l ld: track linker-definedness of symbols 2016-07-05 11:36:08 +02:00
ldmain.c Formatting fixes. 2016-06-14 13:25:21 +09:30
ldmain.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldmisc.c Delete bfd_my_archive macro 2016-06-14 13:24:37 +09:30
ldmisc.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldver.c Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldver.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
ldwrite.c Formatting fixes. 2016-06-14 13:25:21 +09:30
ldwrite.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
lexsup.c Add support for creating ELF import libraries 2016-07-15 17:50:48 +01:00
MAINTAINERS Copyright update for binutils 2016-01-01 23:00:01 +10:30
Makefile.am Don't include libbfd.h outside of bfd, part 1 2016-07-16 13:25:11 +09:30
Makefile.in Don't include libbfd.h outside of bfd, part 1 2016-07-16 13:25:11 +09:30
mri.c Copyright update for binutils 2016-01-01 23:00:01 +10:30
mri.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
NEWS Add support for creating ELF import libraries 2016-07-15 17:50:48 +01:00
pe-dll.c Ignore DWARF debug information with a version of 0 - assume that it is padding. 2016-04-04 12:53:33 +01:00
pe-dll.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
pep-dll.c Copyright update for binutils 2016-01-01 23:00:01 +10:30
pep-dll.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
plugin.c ld: Restore file offset after a plugin fails to claim a file 2016-07-19 09:58:01 +01:00
plugin.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
README Copyright update for binutils 2016-01-01 23:00:01 +10:30
stamp-h.in
sysdep.h Copyright update for binutils 2016-01-01 23:00:01 +10:30
testplug2.c Remove redundant sizeof on EXPECTED_VIEW_LENGTH 2016-05-14 05:51:28 -07:00
testplug3.c Copyright update for binutils 2016-01-01 23:00:01 +10:30
testplug4.c Remove redundant sizeof on EXPECTED_VIEW_LENGTH 2016-05-14 05:51:28 -07:00
testplug.c ld: Restore file offset after a plugin fails to claim a file 2016-07-19 09:58:01 +01:00
TODO

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.

		README for LD

This is the GNU linker.  It is distributed with other "binary
utilities" which should be in ../binutils.  See ../binutils/README for
more general notes, including where to send bug reports.

There are many features of the linker:

* The linker uses a Binary File Descriptor library (../bfd)
  that it uses to read and write object files.  This helps
  insulate the linker itself from the format of object files.

* The linker supports a number of different object file
  formats.  It can even handle multiple formats at once:
  Read two input formats and write a third.

* The linker can be configured for cross-linking.

* The linker supports a control language.

* There is a user manual (ld.texinfo), as well as the
  beginnings of an internals manual (ldint.texinfo).

Installation
============

See ../binutils/README.

If you want to make a cross-linker, you may want to specify
a different search path of -lfoo libraries than the default.
You can do this by setting the LIB_PATH variable in ./Makefile
or using the --with-lib-path configure switch.

To build just the linker, make the target all-ld from the top level
directory (one directory above this one).

Porting to a new target
=======================

See the ldint.texinfo manual.

Reporting bugs etc
===========================

See ../binutils/README.

Known problems
==============

The Solaris linker normally exports all dynamic symbols from an
executable.  The GNU linker does not do this by default.  This is
because the GNU linker tries to present the same interface for all
similar targets (in this case, all native ELF targets).  This does not
matter for normal programs, but it can make a difference for programs
which try to dlopen an executable, such as PERL or Tcl.  You can make
the GNU linker export all dynamic symbols with the -E or
--export-dynamic command line option.

HP/UX 9.01 has a shell bug that causes the linker scripts to be
generated incorrectly.  The symptom of this appears to be "fatal error
- scanner input buffer overflow" error messages.  There are various
workarounds to this:
  * Build and install bash, and build with "make SHELL=bash".
  * Update to a version of HP/UX with a working shell (e.g., 9.05).
  * Replace "(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc)" in
    genscripts.sh with "sh ${srcdir}..." (no parens) and make sure the
    emulparams script used exports any shell variables it sets.

Copyright (C) 2012-2016 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.