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Alan Modra e10a07b32d Power10 stub selection
This patch better supports mixing of power10 and non-power10 code,
as might be seen in a cpu-optimized library using ifuncs to select
functions optimized for a given cpu.  Using -Wl,--no-power10-stubs
isn't that good in this situation since non-power10 notoc stubs are
slower and larger than the power10 variants, which you'd like to use
on power10 code paths.

With this change, power10 pc-relative code that makes calls marked
@notoc uses power10 stubs if stubs are necessary, and other calls use
non-power10 instructions in stubs.  This will mean that if gcc is
generating code for -mcpu=power10 but with pc-rel disabled then you'll
get the older stubs even on power10 (unless you force with
-Wl,--power10-stubs).  That shouldn't be too big a problem: stubs that
use r2 are reasonable.  It's just the ones that set up addressing
using "mflr 12; bcl 20,31,.+4; mflr 11; mtlr 12" that should be
avoided if possible.

bfd/
	* elf64-ppc.c (struct ppc_link_hash_table): Add has_power10_relocs.
	(select_alt_stub): New function.
	(ppc_get_stub_entry): Use it here.
	(ppc64_elf_check_relocs): Set had_power10_relocs rather than
	power10_stubs.
	(ppc64_elf_size_stubs): Clear power10_stubs here instead.  Don't
	merge notoc stubs with other varieties when power10_stubs is "auto".
	Instead dup the stub hash table entry.
	(plt_stub_size, ppc_build_one_stub, ppc_size_one_stub): Adjust
	tests of power10_stubs.
ld/
	* emultempl/ppc64elf.em (power10-stubs): Accept optional "auto" arg.
	* ld.texi (power10-stubs): Update.
	* testsuite/ld-powerpc/callstub-1.d: Force --power10-stubs.
	* testsuite/ld-powerpc/callstub-2.d: Relax branch offset comparison.
	* testsuite/ld-powerpc/callstub-4.d: New test.
	* testsuite/ld-powerpc/notoc.d: Force --no-power10-stubs.
	* testsuite/ld-powerpc/notoc3.d,
	* testsuite/ld-powerpc/notoc3.s,
	* testsuite/ld-powerpc/notoc3.wf: New test.
	* testsuite/ld-powerpc/powerpc.exp: Run new tests.  Pass
	--no-power10-stubs for notoc link.
2020-07-19 12:27:47 +09:30
bfd Power10 stub selection 2020-07-19 12:27:47 +09:30
binutils arc: Detect usage of illegal double register pairs 2020-07-14 14:51:15 +03:00
config Add markers for binutils 2.35 branch 2020-07-04 10:16:22 +01:00
contrib contrib: Update dg-extract-results.* from gcc 2020-05-15 11:41:22 +01:00
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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 x86: Don't display eiz with no scale 2020-07-15 06:57:47 -07:00
gdb Remove "linux_multi_process" global 2020-07-18 10:43:16 -06:00
gdbserver gdb/riscv: delete target descriptions when gdb exits 2020-07-17 21:15:32 +01:00
gdbsupport gdb/riscv: delete target descriptions when gdb exits 2020-07-17 21:15:32 +01:00
gnulib gdb: update gnulib import 2020-02-22 20:37:18 -05:00
gold Commit: Fix GOLD testsuite failures for 2.35 branch. 2020-07-08 11:08:05 +01:00
gprof Update Turkish translation in the gprof sub-directory 2020-07-09 14:25:11 +01:00
include x86: Support GNU_PROPERTY_X86_FEATURE_2_TMM 2020-07-11 04:04:20 -07:00
intl Regen with blessed automake-1.15.1 2020-02-20 13:02:24 +10:30
ld Power10 stub selection 2020-07-19 12:27:47 +09:30
libctf Add markers for binutils 2.35 branch 2020-07-04 10:16:22 +01:00
libdecnumber
libiberty Sync config, include and libiberty with GCC 2020-06-24 16:52:48 -07:00
opcodes x86: Don't display eiz with no scale 2020-07-15 06:57:47 -07:00
readline Update readline/README to mention patchlevel 2020-06-30 15:17:07 -06:00
sim sim/igen: Fix linker error with -fno-common 2020-07-03 21:03:47 +02:00
texinfo
zlib Merge changes from GCC for the config/ directory 2020-02-19 17:51:24 +00:00
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.gitignore Add profiling outputs to .gitignore 2019-12-26 06:54:58 +01:00
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ChangeLog Add markers for binutils 2.35 branch 2020-07-04 10:16:22 +01:00
compile
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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 Since the pdp11-aout target does not support gdb, gdbserver or gprof these should be excluded in configure. 2020-04-21 10:27:50 +01:00
configure.ac Since the pdp11-aout target does not support gdb, gdbserver or gprof these should be excluded in configure. 2020-04-21 10:27:50 +01:00
COPYING
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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
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src-release.sh Move gdbserver to top level 2020-02-07 08:42:25 -07:00
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		   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.