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Alan Modra 252dcdf432 PowerPC TPREL_HA/LO optimisation
ppc64 ld optimises sequences like the following
	addis 3,13,wot@tprel@ha
	lwz 3,wot@tprel@l(3)
to
	nop
	lwz 3,wot@tprel(13)
when "wot" is located near enough to the thread pointer.
However, the ABI doesn't require that R_PPC64_TPREL16_HA always be on
an addis rt,13,imm instruction, and while ld checked for that on the
high-part instruction it didn't disable the optimisation on the
low-part instruction.  This patch fixes that problem, disabling the
tprel optimisation globally if high-part instructions don't pass
sanity checks.  The optimisation is also enabled for ppc32, where
before ld.bfd had the code in the wrong place and ld.gold had it in a
block only enabled for ppc64.

bfd/
	* elf32-ppc.c (ppc_elf_check_relocs): Set has_tls_reloc for
	high part tprel16 relocs.
	(ppc_elf_tls_optimize): Sanity check high part tprel16 relocs.
	Clear do_tls_opt on odd instructions.
	(ppc_elf_relocate_section): Move TPREL16_HA/LO optimisation later.
	Don't sanity check them here.
	* elf64-ppc.c (ppc64_elf_check_relocs): Set has_tls_reloc for
	high part tprel16 relocs.
	(ppc64_elf_tls_optimize): Sanity check high part tprel16 relocs.
	Clear do_tls_opt on odd instructions.
	(ppc64_elf_relocate_section): Don't sanity check TPREL16_HA.
ld/
	* testsuite/ld-powerpc/tls32.d: Update for TPREL_HA/LO optimisation.
	* testsuite/ld-powerpc/tlsexe32.d: Likewise.
	* testsuite/ld-powerpc/tlsldopt32.d: Likewise.
	* testsuite/ld-powerpc/tlsmark32.d: Likewise.
	* testsuite/ld-powerpc/tlsopt4_32.d: Likewise.
	* testsuite/ld-powerpc/tprel.s,
	* testsuite/ld-powerpc/tprel.d,
	* testsuite/ld-powerpc/tprel32.d: New tests.
	* testsuite/ld-powerpc/tprelbad.s,
	* testsuite/ld-powerpc/tprelbad.d: New test.
	* testsuite/ld-powerpc/powerpc.exp: Run them.
gold/
	* powerpc.cc (Target_powerpc): Add tprel_opt_ and accessors.
	(Target_powerpc::Scan::local): Sanity check tprel high relocs.
	(Target_powerpc::Scan::global): Likewise.
	(Target_powerpc::Relocate::relocate): Control tprel optimisation
	with tprel_opt_ and enable for 32-bit.
2020-08-24 21:15:06 +09:30
bfd PowerPC TPREL_HA/LO optimisation 2020-08-24 21:15:06 +09:30
binutils gcc-4 -Og false positive "may be used uninitialised" 2020-08-24 13:29:22 +09:30
config Unify Solaris procfs and largefile handling 2020-07-30 15:41:50 +02:00
contrib contrib: Update dg-extract-results.* from gcc 2020-05-15 11:41:22 +01:00
cpu Add markers for binutils 2.35 branch 2020-07-04 10:16:22 +01:00
elfcpp Add markers for binutils 2.35 branch 2020-07-04 10:16:22 +01:00
etc texi2pod.pl: import support for @t{...} from gcc 2020-01-15 12:58:09 -05:00
gas Remove "memory exhausted" messages 2020-08-24 13:29:33 +09:30
gdb ada-lex.l: Ignore register diagnostic also for g++ defaulting to ISO C++17 2020-08-23 12:14:34 +02:00
gdbserver gdb: allow specifying multiple filters when running selftests 2020-08-13 07:55:48 -04:00
gdbsupport gdb: allow specifying multiple filters when running selftests 2020-08-13 07:55:48 -04:00
gnulib Unify Solaris procfs and largefile handling 2020-07-30 15:41:50 +02:00
gold PowerPC TPREL_HA/LO optimisation 2020-08-24 21:15:06 +09:30
gprof Unify Solaris procfs and largefile handling 2020-07-30 15:41:50 +02:00
include CSKY: Add ck803r2 series cpu. 2020-08-24 10:25:03 +08:00
intl Regen with blessed automake-1.15.1 2020-02-20 13:02:24 +10:30
ld PowerPC TPREL_HA/LO optimisation 2020-08-24 21:15:06 +09:30
libctf libctf: compilation failure on MinGW due to missing errno values 2020-07-26 16:11:36 -07:00
libdecnumber Run autoreconf -vf throughout 2020-07-29 16:03:55 -04:00
libiberty Sync config, include and libiberty with GCC 2020-06-24 16:52:48 -07:00
opcodes CSKY: Add ck803r2 series cpu. 2020-08-24 10:25:03 +08:00
readline Update readline/README to mention patchlevel 2020-06-30 15:17:07 -06:00
sim sim/bfin: include config/pkg.m4 in configure.ac 2020-08-21 11:55:08 -04:00
texinfo
zlib Merge changes from GCC for the config/ directory 2020-02-19 17:51:24 +00:00
.cvsignore
.gitattributes
.gitignore Add profiling outputs to .gitignore 2019-12-26 06:54:58 +01:00
ar-lib
ChangeLog PKG_CHECK_MODULES: Check if $pkg_cv_[]$1[]_LIBS works 2020-07-28 03:56:34 -07:00
compile
config-ml.in
config.guess Update top level config files with copies from the official repository. 2020-01-18 13:43:19 +00:00
config.rpath
config.sub Update top level config files with copies from the official repository. 2020-01-18 13:43:19 +00:00
configure config/debuginfod.m4: Use PKG_CHECK_MODULES 2020-07-24 15:16:20 -04:00
configure.ac config/debuginfod.m4: Use PKG_CHECK_MODULES 2020-07-24 15:16:20 -04:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS Move gdbserver to top level 2020-02-07 08:42:25 -07:00
Makefile.def Change gdbserver to use existing gdbsupport 2020-03-12 13:32:16 -06:00
Makefile.in Change gdbserver to use existing gdbsupport 2020-03-12 13:32:16 -06:00
Makefile.tpl Revert "Sync top level files with versions from gcc." 2019-05-30 11:17:19 +01:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am Merge autoconf / automake update changes from GCC. 2018-10-31 17:10:56 +00:00
README
README-maintainer-mode
setup.com
src-release.sh Move gdbserver to top level 2020-02-07 08:42:25 -07:00
symlink-tree
test-driver
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.