1 files changed, 64 insertions, 0 deletions
diff --git a/gdb/nat/aarch64-linux.c b/gdb/nat/aarch64-linux.c
new file mode 100644
index 0000000..7b4ead7
--- /dev/null
+++ b/gdb/nat/aarch64-linux.c
@@ -0,0 +1,64 @@
+/* Copyright (C) 2009-2015 Free Software Foundation, Inc.
+   Contributed by ARM Ltd.
+
+   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 "common-defs.h"
+#include "break-common.h"
+#include "nat/linux-nat.h"
+#include "nat/aarch64-linux-hw-point.h"
+#include "nat/aarch64-linux.h"
+
+/* Called when resuming a thread LWP.
+   The hardware debug registers are updated when there is any change.  */
+
+void
+aarch64_linux_prepare_to_resume (struct lwp_info *lwp)
+{
+  struct arch_lwp_info *info = lwp_arch_private_info (lwp);
+
+  /* NULL means this is the main thread still going through the shell,
+     or, no watchpoint has been set yet.  In that case, there's
+     nothing to do.  */
+  if (info == NULL)
+    return;
+
+  if (DR_HAS_CHANGED (info->dr_changed_bp)
+      || DR_HAS_CHANGED (info->dr_changed_wp))
+    {
+      ptid_t ptid = ptid_of_lwp (lwp);
+      int tid = ptid_get_lwp (ptid);
+      struct aarch64_debug_reg_state *state
+	= aarch64_get_debug_reg_state (ptid_get_pid (ptid));
+
+      if (show_debug_regs)
+	debug_printf ("prepare_to_resume thread %d\n", tid);
+
+      /* Watchpoints.  */
+      if (DR_HAS_CHANGED (info->dr_changed_wp))
+	{
+	  aarch64_linux_set_debug_regs (state, tid, 1);
+	  DR_CLEAR_CHANGED (info->dr_changed_wp);
+	}
+
+      /* Breakpoints.  */
+      if (DR_HAS_CHANGED (info->dr_changed_bp))
+	{
+	  aarch64_linux_set_debug_regs (state, tid, 0);
+	  DR_CLEAR_CHANGED (info->dr_changed_bp);
+	}
+    }
+}