Add native target for FreeBSD/aarch64.

gdb/ChangeLog:

	* Makefile.in (ALLDEPFILES): Add mips-fbsd-nat.c.
	* NEWS: Mention new FreeBSD/mips native configuration.
	* configure.host: Add aarch64*-*-freebsd*.
	* configure.nat: Likewise.
	* aarch64-fbsd-nat.c: New file.

6 files changed, 148 insertions, 0 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c44401c..3d83ee3 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
 2017-09-06  John Baldwin  <jhb@FreeBSD.org>
 
+	* Makefile.in (ALLDEPFILES): Add mips-fbsd-nat.c.
+	* NEWS: Mention new FreeBSD/mips native configuration.
+	* configure.host: Add aarch64*-*-freebsd*.
+	* configure.nat: Likewise.
+	* aarch64-fbsd-nat.c: New file.
+
+2017-09-06  John Baldwin  <jhb@FreeBSD.org>
+
 	* Makefile.in (ALL_64_TARGET_OBS): Add aarch64-fbsd-tdep.o.
 	(ALLDEPFILES): Add aarch64-fbsd-tdep.c.
 	* NEWS: Mention new FreeBSD/aarch64 target.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 8593f73..2aa474e 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -2497,6 +2497,7 @@ force_update:
 MAKEOVERRIDES =
 
 ALLDEPFILES = \
+	aarch64-fbsd-nat.c \
 	aarch64-fbsd-tdep.c \
 	aarch64-linux-nat.c \
 	aarch64-linux-tdep.c \
diff --git a/gdb/NEWS b/gdb/NEWS
index 038abbf..0280a2e 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -92,6 +92,10 @@ show debug separate-debug-file
     (gdb) p (float) var
     $3 = 3.14
 
+* New native configurations
+
+FreeBSD/aarch64			aarch64*-*-freebsd*
+
 * New targets
 
 FreeBSD/aarch64			aarch64*-*-freebsd*
diff --git a/gdb/aarch64-fbsd-nat.c b/gdb/aarch64-fbsd-nat.c
new file mode 100644
index 0000000..ffe7d5b
--- /dev/null
+++ b/gdb/aarch64-fbsd-nat.c
@@ -0,0 +1,129 @@
+/* Native-dependent code for FreeBSD/aarch64.
+
+   Copyright (C) 2017 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "target.h"
+
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+
+#include "fbsd-nat.h"
+#include "aarch64-tdep.h"
+#include "aarch64-fbsd-tdep.h"
+#include "inf-ptrace.h"
+
+/* Determine if PT_GETREGS fetches REGNUM.  */
+
+static bool
+getregs_supplies (struct gdbarch *gdbarch, int regnum)
+{
+  return (regnum >= AARCH64_X0_REGNUM && regnum <= AARCH64_CPSR_REGNUM);
+}
+
+/* Determine if PT_GETFPREGS fetches REGNUM.  */
+
+static bool
+getfpregs_supplies (struct gdbarch *gdbarch, int regnum)
+{
+  return (regnum >= AARCH64_V0_REGNUM && regnum <= AARCH64_FPCR_REGNUM);
+}
+
+/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
+   for all registers.  */
+
+static void
+aarch64_fbsd_fetch_inferior_registers (struct target_ops *ops,
+				    struct regcache *regcache, int regnum)
+{
+  pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache));
+
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+    {
+      struct reg regs;
+
+      if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+	perror_with_name (_("Couldn't get registers"));
+
+      regcache->supply_regset (&aarch64_fbsd_gregset, regnum, &regs,
+			       sizeof (regs));
+    }
+
+  if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
+    {
+      struct fpreg fpregs;
+
+      if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+	perror_with_name (_("Couldn't get floating point status"));
+
+      regcache->supply_regset (&aarch64_fbsd_fpregset, regnum, &fpregs,
+			       sizeof (fpregs));
+    }
+}
+
+/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
+   this for all registers.  */
+
+static void
+aarch64_fbsd_store_inferior_registers (struct target_ops *ops,
+				    struct regcache *regcache, int regnum)
+{
+  pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache));
+
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+    {
+      struct reg regs;
+
+      if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+	perror_with_name (_("Couldn't get registers"));
+
+      regcache->collect_regset (&aarch64_fbsd_gregset, regnum, &regs,
+			       sizeof (regs));
+
+      if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+	perror_with_name (_("Couldn't write registers"));
+    }
+
+  if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
+    {
+      struct fpreg fpregs;
+
+      if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+	perror_with_name (_("Couldn't get floating point status"));
+
+      regcache->collect_regset (&aarch64_fbsd_fpregset, regnum, &fpregs,
+				sizeof (fpregs));
+
+      if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+	perror_with_name (_("Couldn't write floating point status"));
+    }
+}
+
+void
+_initialize_aarch64_fbsd_nat (void)
+{
+  struct target_ops *t;
+
+  t = inf_ptrace_target ();
+  t->to_fetch_registers = aarch64_fbsd_fetch_inferior_registers;
+  t->to_store_registers = aarch64_fbsd_store_inferior_registers;
+  fbsd_nat_add_target (t);
+}
diff --git a/gdb/configure.host b/gdb/configure.host
index d74fd04..304675f 100644
--- a/gdb/configure.host
+++ b/gdb/configure.host
@@ -84,6 +84,7 @@ case "${host}" in
 *-*-darwin*)		gdb_host=darwin ;;
 
 aarch64*-*-linux*)	gdb_host=linux ;;
+aarch64*-*-freebsd*)	gdb_host=fbsd ;;
 
 alpha*-*-linux*)	gdb_host=alpha-linux ;;
 alpha*-*-netbsd* | alpha*-*-knetbsd*-gnu)
diff --git a/gdb/configure.nat b/gdb/configure.nat
index b1dda30..8a01f4b 100644
--- a/gdb/configure.nat
+++ b/gdb/configure.nat
@@ -144,6 +144,11 @@ case ${gdb_host} in
 	;;
     fbsd)
 	case ${gdb_host_cpu} in
+	    aarch64)
+		# Host: FreeBSD/aarch64
+		NATDEPFILES="${NATDEPFILES} aarch64-fbsd-nat.o"
+		LOADLIBES=
+		;;
 	    i386)
 		# Host: FreeBSD/i386
 		NATDEPFILES="${NATDEPFILES} x86-nat.o x86-dregs.o \