freebsd-skq/contrib/binutils/ld
emaste 08c91459af use INT3 instead of NOP for x86 binary padding
We should never end up executing the inter-function padding, so we
are better off faulting than silently carrying on to whatever function
happens to be next.

Note that LLD will soon do this by default (although it currently pads
with zeros).

Reviewed by:	dim, kib
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D10047
2017-03-19 00:22:13 +00:00
..
emulparams use INT3 instead of NOP for x86 binary padding 2017-03-19 00:22:13 +00:00
emultempl In r253839 the default behaviour of ld(1) was changed such that all 2014-08-28 18:33:42 +00:00
po
scripttempl Fix ldscripts such that ld(1) collects the .fini_array section in the same 2015-02-11 17:25:23 +00:00
aclocal.m4
ChangeLog
ChangeLog-0001
ChangeLog-0203
ChangeLog-2006
ChangeLog-9197
ChangeLog-9899
config.in
configdoc.texi Add pregenerated documentation for as(1) and ld(1) 2015-01-04 00:58:30 +00:00
configure
configure.host
configure.in
configure.tgt
deffile.h
deffilep.y
dep-in.sed
fdl.texi
gen-doc.texi
genscripts.sh
h8-doc.texi
ld.7 Generate manpage out of the texinfo files using texi2mdoc 2015-03-02 17:20:34 +00:00
ld.h
ld.texinfo Fix generating documentation with modern texinfo 2015-01-04 00:54:29 +00:00
ldcref.c
ldctor.c
ldctor.h
ldemul.c
ldemul.h
ldexp.c
ldexp.h
ldfile.c
ldfile.h
ldgram.y
ldint.7 Generate manpage out of the texinfo files using texi2mdoc 2015-03-02 17:20:34 +00:00
ldint.texinfo
ldlang.c
ldlang.h
ldlex.h
ldlex.l
ldmain.c
ldmain.h
ldmisc.c
ldmisc.h
ldver.c
ldver.h
ldwrite.c
ldwrite.h
lexsup.c Implement --no-fatal-warning for compatibility with newer ld 2014-11-29 11:50:19 +00:00
MAINTAINERS
Makefile.am
Makefile.in
mri.c
mri.h
NEWS
pe-dll.c
pe-dll.h
pep-dll.c
pep-dll.h
README
stamp-h.in
sysdep.h
TODO

		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.