binutils-gdb/ld
Roland McGrath c2763e270c Fix references to __ehdr_start when it cannot be defined
ld/
	* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation):
	Don't use bfd_elf_record_link_assignment to mark __ehdr_start
	hidden.  Instead, just do it directly here, and only if it was
	referenced but not defined.

ld/testsuite/
	* ld-elf/ehdr_start-userdef.t: New file.
	* ld-elf/ehdr_start-userdef.d: New file.
	* ld-elf/ehdr_start-strongref.s: New file.
	* ld-elf/ehdr_start-missing.t: New file.
	* ld-elf/ehdr_start-missing.d: New file.
	* ld-elf/ehdr_start-weak.d: New file.
	* ld-mips-elf/ehdr_start-2.nd: Expect __ehdr_start to be global.
2013-11-19 10:54:00 -08:00
..
emulparams Separate emulations for nios2-elf and nios2-linux. 2013-11-18 06:57:28 -08:00
emultempl Fix references to __ehdr_start when it cannot be defined 2013-11-19 10:54:00 -08:00
po
scripttempl Fix typo. 2013-08-23 15:21:53 +00:00
testsuite Fix references to __ehdr_start when it cannot be defined 2013-11-19 10:54:00 -08:00
.gitignore
aclocal.m4
ChangeLog Fix references to __ehdr_start when it cannot be defined 2013-11-19 10:54:00 -08:00
ChangeLog-0001
ChangeLog-0203
ChangeLog-2004
ChangeLog-2005
ChangeLog-2006
ChangeLog-2007
ChangeLog-2008
ChangeLog-2009
ChangeLog-2010
ChangeLog-2011
ChangeLog-2012
ChangeLog-9197
ChangeLog-9899
config.in
configure * libtool.m4 (_LT_ENABLE_LOCK <ld -m flags>): Remove non-canonical 2013-09-20 09:51:25 +00:00
configure.host
configure.in
configure.tgt Separate emulations for nios2-elf and nios2-linux. 2013-11-18 06:57:28 -08:00
deffile.h
deffilep.y PR ld/15957 2013-09-17 13:57:21 +00:00
dep-in.sed
elf-hints-local.h
fdl.texi
gen-doc.texi
genscrba.sh
genscripts.sh * genscripts.sh (LIB_PATH): Don't exclude libdir or tooldir when 2013-09-24 05:59:55 +00:00
h8-doc.texi
ld.h
ld.texinfo PR ld/15896 2013-08-28 09:17:35 +00:00
ldcref.c
ldctor.c
ldctor.h
ldemul.c
ldemul.h
ldexp.c * ldexp.c: Add LOG2CEIL() builtin function to linker script language 2013-08-15 07:30:15 +00:00
ldexp.h
ldfile.c
ldfile.h
ldgram.y * ldexp.c: Add LOG2CEIL() builtin function to linker script language 2013-08-15 07:30:15 +00:00
ldint.texinfo
ldlang.c * ldgram.y: Add ALIGN_WITH_INPUT output section attribute. 2013-07-19 10:39:51 +00:00
ldlang.h * ldgram.y: Add ALIGN_WITH_INPUT output section attribute. 2013-07-19 10:39:51 +00:00
ldlex-wrapper.c
ldlex.h
ldlex.l * ldexp.c: Add LOG2CEIL() builtin function to linker script language 2013-08-15 07:30:15 +00:00
ldmain.c PR ld/16028 2013-10-09 16:30:02 +00:00
ldmain.h
ldmisc.c ld/ 2013-10-10 22:50:40 +00:00
ldmisc.h
ldver.c
ldver.h
ldwrite.c
ldwrite.h
lexsup.c
MAINTAINERS
Makefile.am Separate emulations for nios2-elf and nios2-linux. 2013-11-18 06:57:28 -08:00
Makefile.in Separate emulations for nios2-elf and nios2-linux. 2013-11-18 06:57:28 -08:00
mri.c * ldgram.y: Add ALIGN_WITH_INPUT output section attribute. 2013-07-19 10:39:51 +00:00
mri.h
NEWS binutils/ 2013-09-18 10:39:38 +00:00
pe-dll.c
pe-dll.h
pep-dll.c
pep-dll.h
plugin.c ld/ 2013-10-09 18:16:18 +00:00
plugin.h
README
stamp-h.in
sysdep.h
testplug.c
TODO

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		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 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.