Binutils with MCST patches
Go to file
Thomas Preud'homme 173205ca33 [ARM] Remove ARMv6S-M special casing
=== Context ===

This patch is part of a patch series to add support for ARMv8-R
architecture. Its purpose is to remove special casing for ARMv6S-M
autodetection.

=== Motivation ===

Currently, SWI and SVC mnemonics are enabled for ARMv4T and successor
architectures with extra checks in the handler function (do_t_swi) to
give an error message when ARMv6-M is targeted and some more special
casing in aeabi_set_public_attributes. This was made to exclude these
mnemonics for ARMv6-M unless the OS extension is in use.

However this logic is superfluous: there is already code to check
whether an instruction is available based on the feature bit it is part
of and whether the targeted architecture has that feature bit. This
patch aims at removing that unneeded complexity.

=== Patch description ===

The OS extension is already limited to the ARMv6-M architecture so all
this patch does is redefined availability of the ARM_EXT_OS feature bit
to not be present for ARM_ARCH_V6M. ARM_ARCH_V6SM does not need any
change either because it already includes ARM_EXT_OS.

The patch also make sure that the error message that was given by
do_t_swi when SWI/SVC is unavailable is still the same by detecting the
situation in md_assemble.

2017-06-24  Thomas Preud'homme  <thomas.preudhomme@arm.com>

gas/
	* config/tc-arm.c (arm_ext_v6m): Delete.
	(arm_ext_v7m): Delete.
	(arm_ext_m): Remove ARM_EXT_OS from the set of feature defined M
	profile.
	(arm_arch_v6m_only): Delete.
	(do_t_swi): Remove special case for ARMv6S-M.
	(md_assemble): Display error message previously in do_t_swi when
	SVC is not available.
	(insns): Guard swi and svc by arm_ext_os for Thumb mode.
	(aeabi_set_public_attributes): Remove special case for ARMv6S-M.

include/
	* opcode/arm.h (ARM_AEXT_V4TxM): Add ARM_EXT_OS bit to the set.
	(ARM_AEXT_V4T): Likewise.
	(ARM_AEXT_V5TxM): Likewise.
	(ARM_AEXT_V5T): Likewise.
	(ARM_AEXT_V6M): Mask off ARM_EXT_OS bit.
2017-06-24 10:26:41 +01:00
bfd Automatic date update in version.in 2017-06-24 00:00:42 +00:00
binutils Make the strings utility reject directories. 2017-06-23 10:24:39 +01:00
config
cpu
elfcpp [GOLD] PowerPC64 localentry:0 plt call optimization 2017-06-23 20:39:43 +09:30
etc
gas [ARM] Remove ARMv6S-M special casing 2017-06-24 10:26:41 +01:00
gdb Add XTENSA_MAX_REGISTER_SIZE 2017-06-23 10:21:39 +01:00
gold [GOLD] PowerPC64 localentry:0 plt call optimization 2017-06-23 20:39:43 +09:30
gprof
include [ARM] Remove ARMv6S-M special casing 2017-06-24 10:26:41 +01:00
intl
ld S/390: Add support for pgste marker 2017-06-23 08:00:46 +02:00
libdecnumber
libiberty
opcodes RISC-V: Fix SLTI disassembly 2017-06-23 09:23:58 -07:00
readline
sim
texinfo
zlib
.cvsignore
.gitattributes
.gitignore
ChangeLog
compile
config-ml.in
config.guess
config.rpath
config.sub
configure
configure.ac
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
Makefile.def
Makefile.in
Makefile.tpl
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
README
README-maintainer-mode
setup.com
src-release.sh
symlink-tree
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.