Add an AArch64 simulator to GDB.

sim	* configure.tgt: Add aarch64 entry.
	* configure: Regenerate.
	* sim/aarch64/configure.ac: New configure template.
	* sim/aarch64/aclocal.m4: Generate.
	* sim/aarch64/config.in: Generate.
	* sim/aarch64/configure: Generate.
	* sim/aarch64/cpustate.c: New file - functions for accessing
	AArch64 registers.
	* sim/aarch64/cpustate.h: New header.
	* sim/aarch64/decode.h: New header.
	* sim/aarch64/interp.c: New file - interface between GDB and
	simulator.
	* sim/aarch64/Makefile.in: New makefile template.
	* sim/aarch64/memory.c: New file - functions for simulating
	aarch64 memory accesses.
	* sim/aarch64/memory.h: New header.
	* sim/aarch64/sim-main.h: New header.
	* sim/aarch64/simulator.c: New file - aarch64 simulator
	functions.
	* sim/aarch64/simulator.h: New header.

include/gdb * sim-aarch64.h: New file.

sim/test * configure: Regenerate.
	* sim/aarch64: New directory.

1 files changed, 39 insertions, 0 deletions

diff --git a/sim/aarch64/configure.ac b/sim/aarch64/configure.ac
new file mode 100644
index 0000000..25342d4
--- /dev/null
+++ b/sim/aarch64/configure.ac
@@ -0,0 +1,39 @@
+dnl Process this file with autoconf to produce a configure script.
+
+dnl Copyright (C) 2015 Free Software Foundation, Inc.
+dnl
+dnl Contributed by Red Hat.
+dnl
+dnl This file is part of GDB.
+
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+AC_PREREQ(2.64)dnl
+AC_INIT(Makefile.in)
+sinclude(../common/acinclude.m4)
+
+SIM_AC_COMMON
+
+SIM_AC_OPTION_ENDIAN
+## We use NONSTRICT_ALIGNMENT as the default because AArch64 only
+## enforces 4-byte alignment, even for 8-byte reads/writes.  The
+## common core does not support this, so we opt for non-strict
+## alignment instead.
+SIM_AC_OPTION_ALIGNMENT(NONSTRICT_ALIGNMENT,NONSTRICT_ALIGNMENT)
+SIM_AC_OPTION_HOSTENDIAN
+SIM_AC_OPTION_ENVIRONMENT
+SIM_AC_OPTION_INLINE
+SIM_AC_OPTION_WARNINGS
+
+SIM_AC_OUTPUT