gdb: sim: add command line completion

For now, only the sub-command name is completed.  No support yet for
completing options to that command.  But even this is a huge step as
currently, nothing is completed, and the basic "help sim" is fairly
obtuse as to what exactly the "sim" command accepts.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 17 insertions, 2 deletions

diff --git a/gdb/remote-sim.c b/gdb/remote-sim.c
index baaf4397a42..bf4e0ee715e 100644
--- a/gdb/remote-sim.c
+++ b/gdb/remote-sim.c
@@ -1193,6 +1193,18 @@ simulator_command (char *args, int from_tty)
   registers_changed ();
 }
 
+static char **
+sim_command_completer (struct cmd_list_element *ignore, char *text, char *word)
+{
+  struct sim_inferior_data *sim_data;
+
+  sim_data = inferior_data (current_inferior (), sim_inferior_data_key);
+  if (sim_data == NULL || sim_data->gdbsim_desc == NULL)
+    return NULL;
+
+  return sim_complete_command (sim_data->gdbsim_desc, text, word);
+}
+
 /* Check to see if a thread is still alive.  */
 
 static int
@@ -1287,11 +1299,14 @@ init_gdbsim_ops (void)
 void
 _initialize_remote_sim (void)
 {
+  struct cmd_list_element *c;
+
   init_gdbsim_ops ();
   add_target (&gdbsim_ops);
 
-  add_com ("sim", class_obscure, simulator_command,
-	   _("Send a command to the simulator."));
+  c = add_com ("sim", class_obscure, simulator_command,
+	       _("Send a command to the simulator."));
+  set_cmd_completer (c, sim_command_completer);
 
   sim_inferior_data_key
     = register_inferior_data_with_cleanup (sim_inferior_data_cleanup);