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Shahab Vahedi fdd8731bd1 arc: Add hardware loop detection
For ARC there are registers that are not part of a required set in XML
target descriptions by default, but are almost always present on ARC
targets and are universally exposed by the ptrace interface.  Hardware
loop registers being one of them.

LP_START and LP_END auxiliary registers are hardware loop start and end.
Formally, they are optional, but it is hard to find an ARC configuration
that doesn't have them.  They are always present in processors that can
run GNU/Linux.  GDB needs to know about those registers to implement
proper software single stepping, since they affect  what instruction
will be next.

This commit adds the code to check for the existance of "lp_start" and
"lp_end" in XML target descriptions. If they exist, then the function
reports that the target supports hardware loops.

gdb/ChangeLog:

	* arc-tdep.c (arc_check_for_hardware_loop): New.
	* arc-tdep.h (gdbarch_tdep): New field has_hw_loops.

gdb/doc/ChangeLog:

	* gdb.texinfo (Synopsys ARC): Document LP_START, LP_END and BTA.
2020-08-25 17:31:29 +02:00
bfd Fix the linker's handling of DWARF-5 line number tables. 2020-08-25 15:33:00 +01:00
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 PR26501, ASAN: tic54x_undefined_symbol tc-tic54x.c:5015 2020-08-25 23:07:10 +09:30
gdb arc: Add hardware loop detection 2020-08-25 17:31:29 +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 new arch CK860. 2020-08-24 20:27:07 +08:00
intl Regen with blessed automake-1.15.1 2020-02-20 13:02:24 +10:30
ld tic54x ld testsuite 2020-08-25 19:31:57 +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 PR26504, ASAN: parse_disassembler_options vax-dis.c:142 2020-08-25 23:07:10 +09:30
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 Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ChangeLog PKG_CHECK_MODULES: Check if $pkg_cv_[]$1[]_LIBS works 2020-07-28 03:56:34 -07:00
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 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 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 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 Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
setup.com
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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.