Add support for target switches in simulator

[Nick Clifton <nickc@cambridge.redhat.com>]

Hi Guys,

  I would like permission to apply the following patch.  It adds the
  ability for simulator backends to parse their own command line
  switches, thus creating target specific simulator options.

  I would like this facility in order to be able to add a new switch
  to the ARM simulator - a switch to select which set(s) of SWI
  emulations it should perform.

  I have not worked out how this feature would be accessed from GDB.
  My guess is that the switches could be added to the arguments passed
  via sim_open(), but how would a GDB user tell GDB to add these
  switches ?

Cheers
        Nick

sim/common/ChangeLog
2002-05-16  Nick Clifton  <nickc@cambridge.redhat.com>

	* run.c (main): Call sim_target_parse_command_line if
	SIM_TARGET_SWITCHES is defined.
	(usage): Call sim_target_display_usage if SIM_TARGET_SWITCHES
	is defined.

include/ChangeLog
2002-05-16  Nick Clifton  <nickc@cambridge.redhat.com>

	* remote-sim.h: Provide prototypes for
	sim_target_parse_command_line and sim_target_display_usage
	if SIM_TARGET_SWITCHES is defined.

Index: sim/common/run.c
===================================================================
RCS file: /cvs/src/src/sim/common/run.c,v
retrieving revision 1.7
diff -c -3 -p -w -r1.7 run.c
*** sim/common/run.c	21 Dec 2001 00:47:18 -0000	1.7
--- sim/common/run.c	16 May 2002 16:04:36 -0000
*************** main (ac, av)
*** 111,116 ****
--- 111,120 ----
    default_callback.init (&default_callback);
    sim_set_callbacks (&default_callback);
  
+ #ifdef SIM_TARGET_SWITCHES
+   ac = sim_target_parse_command_line (ac, av);
+ #endif
+ 
    /* FIXME: This is currently being rewritten to have each simulator
       do all argv processing.  */
  
*************** usage ()
*** 334,338 ****
--- 338,346 ----
    fprintf (stderr, "\n");
    fprintf (stderr, "program args    Arguments to pass to simulated program.\n");
    fprintf (stderr, "                Note: Very few simulators support this.\n");
+ #ifdef SIM_TARGET_SWITCHES
+   fprintf (stderr, "\nTarget specific options:\n");
+   sim_target_display_usage ();
+ #endif
    exit (1);
  }

Index: include/remote-sim.h
===================================================================
RCS file: /cvs/src/src/include/remote-sim.h,v
retrieving revision 1.4
diff -c -3 -p -w -r1.4 remote-sim.h
*** include/remote-sim.h	14 Mar 2001 02:27:43 -0000	1.4
--- include/remote-sim.h	16 May 2002 16:07:49 -0000
*************** void sim_set_profile_size PARAMS ((int n
*** 346,351 ****
--- 346,362 ----
     multi-cpu simulators. */
  
  void sim_kill PARAMS ((SIM_DESC sd));
+ 
+ #ifdef SIM_TARGET_SWITCHES
+   /* Parse the command line, extracting any target specific switches
+      before the generic simulator code gets a chance to complain
+      about them.  Returns the adjusted value of argc.  */
+ int sim_target_parse_command_line PARAMS ((int, char **));
+ 
+   /* Display a list of target specific switches supported by this
+      target.  */
+ void sim_target_display_usage PARAMS ((void));
+ #endif
  
  #ifdef __cplusplus
  }