target: make target re-configuration possible again

Before commit 877cec2
("command: check command mode for native jim commands") all the jim commands
were erroneously treated as they had mode COMMAND_ANY.

The command '$_TARGET configure -xxx' was therefore applicable on running
OpenOCD to change the target configuration. It is handy e.g. for changing
an event handler or changes of the work area.

Change 'configure' command .mode to COMMAND_ANY to make it possible again.

The only parameter which cannot be re-configured after init is -gdb-port.
Test the command mode and refuse setting of gdb port after init.

Change-Id: I88493ac10a46647dc52a88fbc9f8ce6b5ba3bcd0
Signed-off-by: Tomas Vanek <[email protected]>
Reviewed-on: http:https://openocd.zylin.com/5214
Reviewed-by: Antonio Borneo <[email protected]>
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <[email protected]>

src/target/target.c

@@ -4893,6 +4893,12 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
 
  case TCFG_GDB_PORT:
  if (goi->isconfigure) {
+ struct command_context *cmd_ctx = current_command_context(goi->interp);
+ if (cmd_ctx->mode != COMMAND_CONFIG) {
+ Jim_SetResultString(goi->interp, "-gdb-port must be configured before 'init'", -1);
+ return JIM_ERR;
+ }
+
  const char *s;
  e = Jim_GetOpt_String(goi, &s, NULL);
  if (e != JIM_OK)
@@ -5194,7 +5200,7 @@ static int jim_target_invoke_event(Jim_Interp *interp, int argc, Jim_Obj *const
 static const struct command_registration target_instance_command_handlers[] = {
  {
  .name = "configure",
- .mode = COMMAND_CONFIG,
+ .mode = COMMAND_ANY,
  .jim_handler = jim_target_configure,
  .help = "configure a new target for use",
  .usage = "[target_attribute ...]",