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Max Filippov c451bb34ae xtensa: don't emit dynamic relocation for weak undefined symbol
Resolved reference to a weak undefined symbol in PIE must not have
a dynamic relative relocation against itself, otherwise the value of a
reference will be changed from 0 to the base of executable, breaking
code like the following:

  void weak_function (void);
  if (weak_function)
    weak_function ();

This fixes tests for PR ld/22269 and a number of PIE tests in xtensa gcc
testsuite.

bfd/
2018-07-06  Max Filippov  <jcmvbkbc@gmail.com>

	* elf32-xtensa.c (elf_xtensa_allocate_dynrelocs): Don't allocate
	space for dynamic relocation for undefined weak symbol.
	(elf_xtensa_relocate_section): Don't emit R_XTENSA_RELATIVE
	relocation for undefined weak symbols.
	(shrink_dynamic_reloc_sections): Don't shrink dynamic relocation
	section for relocations against undefined weak symbols.
2018-07-06 16:05:49 -07:00
bfd xtensa: don't emit dynamic relocation for weak undefined symbol 2018-07-06 16:05:49 -07:00
binutils Stop readelf from reporting gaps in the gnu build notes if the gap crosses a section boundary. 2018-07-06 13:52:59 +01:00
config Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
cpu PR22069, Several instances of register accidentally spelled as regsiter 2018-05-09 15:55:28 +09:30
elfcpp [GOLD] PowerPC .gnu.attributes support 2018-07-06 15:18:51 +09:30
etc Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
gas Fix the read/write flag for these registers on AArch64 2018-07-06 16:17:17 +01:00
gdb gdb/testsuite: Ensure test links in malloc and free 2018-07-06 14:31:37 +01:00
gold [GOLD] PowerPC .gnu.attributes support 2018-07-06 15:18:51 +09:30
gprof Fix use of "command line X" in binutils doc 2018-07-02 11:18:24 +01:00
include Fix diagnostic errors 2018-07-06 15:18:59 +09:30
intl Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ld RISC-V: Add riscv-*-* configure support, and minor cleanup. 2018-07-05 17:49:11 -07:00
libdecnumber Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
libiberty Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
opcodes Fix SBO bit in disassembly mask for ldrah on AArch64. 2018-07-06 16:18:47 +01:00
readline Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
sim Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
texinfo
zlib Regen doc/Makefile.in 2018-06-21 23:00:05 +09:30
.cvsignore
.gitattributes
.gitignore Add archives and make stamps to the .gitignore file. 2016-09-27 15:10:42 +01:00
ar-lib Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ChangeLog Update config.sub 2018-07-06 08:23:40 +02:00
compile
config-ml.in Update top level configure files by synchronizing them with gcc. 2018-01-10 15:29:21 +00:00
config.guess Update config.guess and config.sub 2018-07-05 13:35:19 +02:00
config.rpath
config.sub Update config.sub 2018-07-06 08:23:40 +02:00
configure Introduce @unless/@endunless and postbootstrap Makefile targets 2018-06-29 23:49:28 -03:00
configure.ac Introduce @unless/@endunless and postbootstrap Makefile targets 2018-06-29 23:49:28 -03:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS Update the address of the FSF in the copyright notice of files which were using the old address. 2017-12-14 12:48:55 +00:00
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4 Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def This was already applied on the GCC side. 2018-06-19 00:05:40 +02:00
Makefile.in Introduce @unless/@endunless and postbootstrap Makefile targets 2018-06-29 23:49:28 -03:00
Makefile.tpl Introduce @unless/@endunless and postbootstrap Makefile targets 2018-06-29 23:49:28 -03:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
README
README-maintainer-mode Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
setup.com
src-release.sh Improve junk file removal in source tarball creation script. 2018-01-30 17:48:24 +00:00
symlink-tree
test-driver Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ylwrap

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.