binutils-gdb/ld
H.J. Lu 338c190a92 Check run-time R_X86_64_32 relocation overflow
Since elf_x86_64_check_relocs is called after opening all input files,
we can detect dynamic R_X86_64_32 relocation overflow there.

bfd/

	PR ld/19969
	* elf64-x86-64.c (check_relocs_failed): New.
	(elf_x86_64_need_pic): Moved before elf_x86_64_check_relocs.
	Support relocation agaist local symbol.  Set check_relocs_failed.
	(elf_x86_64_check_relocs): Use elf_x86_64_need_pic.  Check
	R_X86_64_32 relocation overflow.
	(elf_x86_64_relocate_section): Skip if check_relocs failed.
	Update one elf_x86_64_need_pic and remove one elf_x86_64_need_pic.

ld/

	PR ld/19969
	* testsuite/ld-x86-64/pr19969.d: New file.
	* testsuite/ld-x86-64/pr19969a.S: Likewise.
	* testsuite/ld-x86-64/pr19969b.S: Likewise.
	* testsuite/ld-x86-64/x86-64.exp: Run pr19969 tests.
2016-04-20 11:10:38 -07:00
..
emulparams Check ELF relocs after opening all input files 2016-04-20 05:26:51 -07:00
emultempl Check ELF relocs after opening all input files 2016-04-20 05:26:51 -07:00
po
scripttempl Fix typo in name of MSP430 attribute section. 2016-04-07 12:09:20 +01:00
testsuite Check run-time R_X86_64_32 relocation overflow 2016-04-20 11:10:38 -07:00
.gitignore
aclocal.m4 Regenerate Makefile.in/aclocal.m4 automake 1.11.6 2016-04-15 16:20:55 -07:00
ChangeLog Check run-time R_X86_64_32 relocation overflow 2016-04-20 11:10:38 -07:00
ChangeLog-0001
ChangeLog-0203
ChangeLog-2004
ChangeLog-2005
ChangeLog-2006
ChangeLog-2007
ChangeLog-2008
ChangeLog-2009
ChangeLog-2010
ChangeLog-2011
ChangeLog-2012
ChangeLog-2013
ChangeLog-2014
ChangeLog-2015
ChangeLog-9197
ChangeLog-9899
config.in
configure enable -Wwrite-strings for gas 2016-03-31 07:30:56 -04:00
configure.ac Replace == with = in ld/configure.ac 2016-01-29 07:49:18 -08:00
configure.host
configure.tgt Add aarch64-*-rtems* target 2016-02-26 14:07:27 -06:00
deffile.h
deffilep.y
dep-in.sed
elf-hints-local.h
fdl.texi
gen-doc.texi
genscrba.sh
genscripts.sh
h8-doc.texi
ld.h Remove unused field from ld_config_type structure. 2016-02-25 10:33:29 +00:00
ld.texinfo Add new NOCROSSREFS_TO linker script command 2016-04-18 12:45:46 +01:00
ldbuildid.c
ldbuildid.h
ldcref.c Add new NOCROSSREFS_TO linker script command 2016-04-18 12:45:46 +01:00
ldctor.c
ldctor.h
ldemul.c
ldemul.h
ldexp.c
ldexp.h
ldfile.c
ldfile.h
ldgram.y Add new NOCROSSREFS_TO linker script command 2016-04-18 12:45:46 +01:00
ldint.texinfo
ldlang.c Add new NOCROSSREFS_TO linker script command 2016-04-18 12:45:46 +01:00
ldlang.h Add new NOCROSSREFS_TO linker script command 2016-04-18 12:45:46 +01:00
ldlex-wrapper.c
ldlex.h
ldlex.l Add new NOCROSSREFS_TO linker script command 2016-04-18 12:45:46 +01:00
ldmain.c [x86] Resolve non-PIC undefweak symbols in executable 2016-02-26 04:55:57 -08:00
ldmain.h
ldmisc.c
ldmisc.h
ldver.c
ldver.h
ldwrite.c
ldwrite.h
lexsup.c Properly implement STT_COMMON 2016-02-26 05:01:34 -08:00
MAINTAINERS
Makefile.am Add -z noreloc-overflow option to x86-64 ld 2016-03-15 11:07:54 -07:00
Makefile.in Regenerate Makefile.in/aclocal.m4 automake 1.11.6 2016-04-15 16:20:55 -07:00
mri.c
mri.h
NEWS Add new NOCROSSREFS_TO linker script command 2016-04-18 12:45:46 +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
pep-dll.c
pep-dll.h
plugin.c Remove use of alloca. 2016-03-21 16:31:46 +00:00
plugin.h
README
stamp-h.in
sysdep.h
testplug2.c
testplug3.c
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) 2012-2016 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.