Binutils with MCST patches
Go to file
Andre Vieira 32c36c3ce9 [binutils, ARM, 16/16] Add support to VLDR and VSTR of system registers
GNU as' Arm backend assumes each mnemonic has a single entry in the instruction table but VLDR (system register) and VSTR (system register) are different instructions than VLDR and VSTR. It is thus necessary to add some form of demultiplexing in the parser. It starts by creating a new operand type OP_VLDR which indicate that the operand is either the existing OP_RVSD operand or a system register. The function parse_operands () then tries these two cases in order, calling the new parse_sys_vldr_vstr for the second case.

Since the encoding function is specified in the instruction table entry, it also need to have some sort of demultiplexing. This is done in do_vldr_vstr which either calls the existing do_neon_ldr_str () or calls the new do_t_vldr_vstr_sysreg ().

A new internal relocation is needed as well since the offset has a shorter range than in other Thumb coprocessor instructions. Disassembly also requires special care since VSTR (system register) reuse the STC encoding with the coprocessor number 15. Armv8.1-M Mainline ARM manual states that coprocessor 8, 14 and 15 are reserved for floating-point and MVE instructions a feature bit check is added if the coprocessor number is one of this value and we are trying to match a coprocessor instruction (eg. STC) to forbid the match.

ChangeLog entries are as follows:

*** bfd/ChangeLog ***

2019-04-15  Thomas Preud'homme  <thomas.preudhomme@arm.com>

	* reloc.c (BFD_RELOC_ARM_T32_VLDR_VSTR_OFF_IMM): New internal
	relocation.
	* bfd-in2.h: Regenerate.
	* libbfd.h: Likewise.

*** gas/ChangeLog ***

2019-04-15  Thomas Preud'homme  <thomas.preudhomme@arm.com>

	* config/tc-arm.c (parse_sys_vldr_vstr): New function.
	(OP_VLDR): New enum operand_parse_code enumerator.
	(parse_operands): Add logic for OP_VLDR.
	(do_t_vldr_vstr_sysreg): New function.
	(do_vldr_vstr): Likewise.
	(insns): Guard VLDR and VSTR by arm_ext_v4t for Thumb mode.
	(md_apply_fix): Add bound check for VLDR and VSTR co-processor offset.
	Add masking logic for BFD_RELOC_ARM_T32_VLDR_VSTR_OFF_IMM relocation.
	* testsuite/gas/arm/archv8m_1m-cmse-main-bad.s: Add examples of bad
	uses of VLDR and VSTR.
	* testsuite/gas/arm/archv8m_1m-cmse-main-bad.l: Add error messages for
	above bad uses.
	* testsuite/gas/arm/archv8m_1m-cmse-main.s: Add examples of VLDR and
	VSTR valid uses.
	* testsuite/gas/arm/archv8m_1m-cmse-main.d: Add disassembly for the
	above examples.

*** opcodes/ChangeLog ***

2019-04-15  Thomas Preud'homme  <thomas.preudhomme@arm.com>

	* arm-dis.c (coprocessor_opcodes): Document new %J and %K format
	specifier.  Add entries for VLDR and VSTR of system registers.
	(print_insn_coprocessor): Forbid coprocessor numbers 8, 14 and 15 in
	coprocessor instructions on Armv8.1-M Mainline targets.  Add handling
	of %J and %K format specifier.
2019-04-15 12:32:01 +01:00
bfd [binutils, ARM, 16/16] Add support to VLDR and VSTR of system registers 2019-04-15 12:32:01 +01:00
binutils [binutils, ARM, 1/16] Add support for Armv8.1-M Mainline CLI 2019-04-15 10:54:42 +01:00
config Add markers for 2.32 branch to NEWS and ChangeLog files. 2019-01-19 15:55:50 +00:00
contrib
cpu Add markers for 2.32 branch to NEWS and ChangeLog files. 2019-01-19 15:55:50 +00:00
elfcpp [binutils, ARM, 10/16] BFCSEL infrastructure with new global reloc R_ARM_THM_BF12 2019-04-15 12:31:34 +01:00
etc Update year range in copyright notice of binutils files 2019-01-01 22:06:53 +10:30
gas [binutils, ARM, 16/16] Add support to VLDR and VSTR of system registers 2019-04-15 12:32:01 +01:00
gdb gdb: Fix failure in gdb.base/complex-parts.exp for x86-32 2019-04-13 01:02:43 +01:00
gold Check whether symbols with MOVW_.ABS relocations require PLT entries (aarch64). 2019-02-19 16:13:24 -08:00
gprof PR24402, global buffer overflow in symtab_finalize 2019-04-01 13:35:15 +10:30
include [binutils, ARM, 10/16] BFCSEL infrastructure with new global reloc R_ARM_THM_BF12 2019-04-15 12:31:34 +01:00
intl Change version to 2.32.51 and regenerate configure and pot files. 2019-01-19 16:51:42 +00:00
ld [binutils, ARM, 11/16] New BFCSEL instruction for Armv8.1-M Mainline 2019-04-15 12:31:42 +01:00
libdecnumber
libiberty Pull in patch for libiberty that fixes a stack exhaustion bug when demangling a pathalogically constructed mangled name. 2019-04-10 15:49:36 +01:00
opcodes [binutils, ARM, 16/16] Add support to VLDR and VSTR of system registers 2019-04-15 12:32:01 +01:00
readline Readline: Cleanup some warnings 2019-01-31 17:25:06 +00:00
sim sim: Use host not target byte order for merging and splitting values 2019-04-13 22:21:14 +01:00
texinfo
zlib
.cvsignore
.gitattributes
.gitignore
ar-lib
ChangeLog Pull in patch for libiberty that fixes a stack exhaustion bug when demangling a pathalogically constructed mangled name. 2019-04-10 15:49:36 +01:00
compile
config-ml.in
config.guess Sync config.guess, config.sub from GCC 2019-01-14 15:47:35 +01:00
config.rpath
config.sub Sync config.guess, config.sub from GCC 2019-01-14 15:47:35 +01:00
configure Don't build readline/libreadline.a, when --with-system-readline is supplied 2019-01-03 00:03:34 -05:00
configure.ac Don't build readline/libreadline.a, when --with-system-readline is supplied 2019-01-03 00:03:34 -05:00
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
Makefile.def
Makefile.in
Makefile.tpl
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am
README
README-maintainer-mode
setup.com
src-release.sh Move potentially obsolete BFD targets into the definitely obsolete section. Add a note to the README-how-to-make-a-release document about doing this. 2019-02-07 14:30:02 +00:00
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.