diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 6ae5e69721b..72277c12894 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,7 @@
+2015-07-24  Yao Qi  <yao.qi@linaro.org>
+
+	* server.c (process_serial_event): Set general_thread.
+
 2015-07-21  Yao Qi  <yao.qi@linaro.org>
 
 	* linux-aarch64-low.c (aarch64_arch_setup): Remove code and call
diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
index 7e388ddcc9b..fd5f6dc7458 100644
--- a/gdb/gdbserver/server.c
+++ b/gdb/gdbserver/server.c
@@ -4112,7 +4112,20 @@ process_serial_event (void)
 
 	  /* Wait till we are at 1st instruction in prog.  */
 	  if (program_argv != NULL)
-	    start_inferior (program_argv);
+	    {
+	      start_inferior (program_argv);
+	      if (last_status.kind == TARGET_WAITKIND_STOPPED)
+		{
+		  /* Stopped at the first instruction of the target
+		     process.  */
+		  general_thread = last_ptid;
+		}
+	      else
+		{
+		  /* Something went wrong.  */
+		  general_thread = null_ptid;
+		}
+	    }
 	  else
 	    {
 	      last_status.kind = TARGET_WAITKIND_EXITED;
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index f92f5b5db00..a7938f15305 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2015-07-24  Yao Qi  <yao.qi@linaro.org>
+
+	* gdb.server/ext-restart.exp: New file.
+
 2015-07-24  Yao Qi  <yao.qi@linaro.org>
 
 	* lib/gdbserver-support.exp (gdbserver_start_extended): Add
diff --git a/gdb/testsuite/gdb.server/ext-restart.exp b/gdb/testsuite/gdb.server/ext-restart.exp
new file mode 100644
index 00000000000..6995796a930
--- /dev/null
+++ b/gdb/testsuite/gdb.server/ext-restart.exp
@@ -0,0 +1,65 @@
+# This testcase is part of GDB, the GNU debugger.
+
+# Copyright 2015 Free Software Foundation, Inc.
+
+# 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/>.
+
+# Test restarting programs with the R packet.
+
+load_lib gdbserver-support.exp
+
+standard_testfile server.c
+
+if { [skip_gdbserver_tests] } {
+    return 0
+}
+
+if { [prepare_for_testing $testfile.exp $testfile $srcfile debug] } {
+    return -1
+}
+
+# Make sure we're disconnected, in case we're testing with an
+# extended-remote board, therefore already connected.
+gdb_test "disconnect" ".*"
+
+set target_exec [gdbserver_download_current_prog]
+gdbserver_start_extended
+
+gdb_test_no_output "set remote exec-file $target_exec" "set remote exec-file"
+
+gdb_breakpoint main
+gdb_test "run" "Breakpoint.* main .*" "run to main"
+
+# Restart the process.
+with_test_prefix "restart" {
+    # Disable vRun packet and clear remote exec-file, so that GDB will
+    # use R packet to restart the process.
+    gdb_test_no_output "set remote run-packet off"
+    gdb_test_no_output "set remote exec-file"
+
+    set test "run to main"
+    gdb_test_multiple "run" $test {
+	-re {Start it from the beginning\? \(y or n\) $} {
+	    send_gdb "y\n"
+	    exp_continue
+	}
+	-re "Breakpoint.* main .*\r\n$gdb_prompt $" {
+	    pass $test
+	}
+    }
+}
+
+gdb_test "kill" "" "kill" "Kill the program being debugged.*" "y"
+
+gdb_test_no_output "monitor exit"