1 /* Generic remote debugging interface for simulators.
3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
6 Contributed by Cygnus Support.
7 Steve Chamberlain (sac@cygnus.com).
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 Boston, MA 02110-1301, USA. */
29 #include "gdb_string.h"
38 #include "gdb/callback.h"
39 #include "gdb/remote-sim.h"
40 #include "remote-utils.h"
43 #include "gdb_assert.h"
44 #include "sim-regno.h"
45 #include "arch-utils.h"
49 extern void _initialize_remote_sim (void);
51 static void dump_mem (char *buf
, int len
);
53 static void init_callbacks (void);
55 static void end_callbacks (void);
57 static int gdb_os_write_stdout (host_callback
*, const char *, int);
59 static void gdb_os_flush_stdout (host_callback
*);
61 static int gdb_os_write_stderr (host_callback
*, const char *, int);
63 static void gdb_os_flush_stderr (host_callback
*);
65 static int gdb_os_poll_quit (host_callback
*);
67 /* printf_filtered is depreciated */
68 static void gdb_os_printf_filtered (host_callback
*, const char *, ...);
70 static void gdb_os_vprintf_filtered (host_callback
*, const char *, va_list);
72 static void gdb_os_evprintf_filtered (host_callback
*, const char *, va_list);
74 static void gdb_os_error (host_callback
*, const char *, ...);
76 static void gdbsim_fetch_register (int regno
);
78 static void gdbsim_store_register (int regno
);
80 static void gdbsim_kill (void);
82 static void gdbsim_load (char *prog
, int fromtty
);
84 static void gdbsim_open (char *args
, int from_tty
);
86 static void gdbsim_close (int quitting
);
88 static void gdbsim_detach (char *args
, int from_tty
);
90 static void gdbsim_resume (ptid_t ptid
, int step
, enum target_signal siggnal
);
92 static ptid_t
gdbsim_wait (ptid_t ptid
, struct target_waitstatus
*status
);
94 static void gdbsim_prepare_to_store (void);
96 static void gdbsim_files_info (struct target_ops
*target
);
98 static void gdbsim_mourn_inferior (void);
100 static void gdbsim_stop (void);
102 void simulator_command (char *args
, int from_tty
);
104 /* Naming convention:
106 sim_* are the interface to the simulator (see remote-sim.h).
107 gdbsim_* are stuff which is internal to gdb. */
109 /* Forward data declarations */
110 extern struct target_ops gdbsim_ops
;
112 static int program_loaded
= 0;
114 /* We must keep track of whether the simulator has been opened or not because
115 GDB can call a target's close routine twice, but sim_close doesn't allow
116 this. We also need to record the result of sim_open so we can pass it
117 back to the other sim_foo routines. */
118 static SIM_DESC gdbsim_desc
= 0;
121 dump_mem (char *buf
, int len
)
125 if (len
== 8 || len
== 4)
128 memcpy (l
, buf
, len
);
129 printf_filtered ("\t0x%lx", l
[0]);
131 printf_filtered (" 0x%lx", l
[1]);
132 printf_filtered ("\n");
137 printf_filtered ("\t");
138 for (i
= 0; i
< len
; i
++)
139 printf_filtered ("0x%x ", buf
[i
]);
140 printf_filtered ("\n");
145 static host_callback gdb_callback
;
146 static int callbacks_initialized
= 0;
148 /* Initialize gdb_callback. */
151 init_callbacks (void)
153 if (!callbacks_initialized
)
155 gdb_callback
= default_callback
;
156 gdb_callback
.init (&gdb_callback
);
157 gdb_callback
.write_stdout
= gdb_os_write_stdout
;
158 gdb_callback
.flush_stdout
= gdb_os_flush_stdout
;
159 gdb_callback
.write_stderr
= gdb_os_write_stderr
;
160 gdb_callback
.flush_stderr
= gdb_os_flush_stderr
;
161 gdb_callback
.printf_filtered
= gdb_os_printf_filtered
;
162 gdb_callback
.vprintf_filtered
= gdb_os_vprintf_filtered
;
163 gdb_callback
.evprintf_filtered
= gdb_os_evprintf_filtered
;
164 gdb_callback
.error
= gdb_os_error
;
165 gdb_callback
.poll_quit
= gdb_os_poll_quit
;
166 gdb_callback
.magic
= HOST_CALLBACK_MAGIC
;
167 callbacks_initialized
= 1;
171 /* Release callbacks (free resources used by them). */
176 if (callbacks_initialized
)
178 gdb_callback
.shutdown (&gdb_callback
);
179 callbacks_initialized
= 0;
183 /* GDB version of os_write_stdout callback. */
186 gdb_os_write_stdout (host_callback
*p
, const char *buf
, int len
)
191 ui_file_write (gdb_stdtarg
, buf
, len
);
195 /* GDB version of os_flush_stdout callback. */
198 gdb_os_flush_stdout (host_callback
*p
)
200 gdb_flush (gdb_stdtarg
);
203 /* GDB version of os_write_stderr callback. */
206 gdb_os_write_stderr (host_callback
*p
, const char *buf
, int len
)
211 for (i
= 0; i
< len
; i
++)
215 fputs_unfiltered (b
, gdb_stdtargerr
);
220 /* GDB version of os_flush_stderr callback. */
223 gdb_os_flush_stderr (host_callback
*p
)
225 gdb_flush (gdb_stdtargerr
);
228 /* GDB version of printf_filtered callback. */
231 gdb_os_printf_filtered (host_callback
* p
, const char *format
,...)
234 va_start (args
, format
);
236 vfprintf_filtered (gdb_stdout
, format
, args
);
241 /* GDB version of error vprintf_filtered. */
244 gdb_os_vprintf_filtered (host_callback
* p
, const char *format
, va_list ap
)
246 vfprintf_filtered (gdb_stdout
, format
, ap
);
249 /* GDB version of error evprintf_filtered. */
252 gdb_os_evprintf_filtered (host_callback
* p
, const char *format
, va_list ap
)
254 vfprintf_filtered (gdb_stderr
, format
, ap
);
257 /* GDB version of error callback. */
260 gdb_os_error (host_callback
* p
, const char *format
,...)
262 if (deprecated_error_hook
)
263 (*deprecated_error_hook
) ();
267 va_start (args
, format
);
268 verror (format
, args
);
274 one2one_register_sim_regno (int regnum
)
276 /* Only makes sense to supply raw registers. */
277 gdb_assert (regnum
>= 0 && regnum
< NUM_REGS
);
282 gdbsim_fetch_register (int regno
)
286 for (regno
= 0; regno
< NUM_REGS
; regno
++)
287 gdbsim_fetch_register (regno
);
291 switch (REGISTER_SIM_REGNO (regno
))
293 case LEGACY_SIM_REGNO_IGNORE
:
295 case SIM_REGNO_DOES_NOT_EXIST
:
297 /* For moment treat a `does not exist' register the same way
298 as an ``unavailable'' register. */
299 char buf
[MAX_REGISTER_SIZE
];
301 memset (buf
, 0, MAX_REGISTER_SIZE
);
302 regcache_raw_supply (current_regcache
, regno
, buf
);
303 set_register_cached (regno
, -1);
308 static int warn_user
= 1;
309 char buf
[MAX_REGISTER_SIZE
];
311 gdb_assert (regno
>= 0 && regno
< NUM_REGS
);
312 memset (buf
, 0, MAX_REGISTER_SIZE
);
313 nr_bytes
= sim_fetch_register (gdbsim_desc
,
314 REGISTER_SIM_REGNO (regno
),
315 buf
, register_size (current_gdbarch
, regno
));
316 if (nr_bytes
> 0 && nr_bytes
!= register_size (current_gdbarch
, regno
) && warn_user
)
318 fprintf_unfiltered (gdb_stderr
,
319 "Size of register %s (%d/%d) incorrect (%d instead of %d))",
320 REGISTER_NAME (regno
),
321 regno
, REGISTER_SIM_REGNO (regno
),
322 nr_bytes
, register_size (current_gdbarch
, regno
));
325 /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0'
326 indicating that GDB and the SIM have different ideas about
327 which registers are fetchable. */
328 /* Else if (nr_bytes < 0): an old simulator, that doesn't
329 think to return the register size. Just assume all is ok. */
330 regcache_raw_supply (current_regcache
, regno
, buf
);
333 printf_filtered ("gdbsim_fetch_register: %d", regno
);
334 /* FIXME: We could print something more intelligible. */
335 dump_mem (buf
, register_size (current_gdbarch
, regno
));
344 gdbsim_store_register (int regno
)
348 for (regno
= 0; regno
< NUM_REGS
; regno
++)
349 gdbsim_store_register (regno
);
352 else if (REGISTER_SIM_REGNO (regno
) >= 0)
354 char tmp
[MAX_REGISTER_SIZE
];
356 deprecated_read_register_gen (regno
, tmp
);
357 nr_bytes
= sim_store_register (gdbsim_desc
,
358 REGISTER_SIM_REGNO (regno
),
359 tmp
, register_size (current_gdbarch
, regno
));
360 if (nr_bytes
> 0 && nr_bytes
!= register_size (current_gdbarch
, regno
))
361 internal_error (__FILE__
, __LINE__
,
362 _("Register size different to expected"));
363 /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0'
364 indicating that GDB and the SIM have different ideas about
365 which registers are fetchable. */
368 printf_filtered ("gdbsim_store_register: %d", regno
);
369 /* FIXME: We could print something more intelligible. */
370 dump_mem (tmp
, register_size (current_gdbarch
, regno
));
375 /* Kill the running program. This may involve closing any open files
376 and releasing other resources acquired by the simulated program. */
382 printf_filtered ("gdbsim_kill\n");
384 /* There is no need to `kill' running simulator - the simulator is
386 inferior_ptid
= null_ptid
;
389 /* Load an executable file into the target process. This is expected to
390 not only bring new code into the target process, but also to update
391 GDB's symbol tables to match. */
394 gdbsim_load (char *prog
, int fromtty
)
397 printf_filtered ("gdbsim_load: prog \"%s\"\n", prog
);
399 inferior_ptid
= null_ptid
;
401 /* FIXME: We will print two messages on error.
402 Need error to either not print anything if passed NULL or need
403 another routine that doesn't take any arguments. */
404 if (sim_load (gdbsim_desc
, prog
, NULL
, fromtty
) == SIM_RC_FAIL
)
405 error (_("unable to load program"));
407 /* FIXME: If a load command should reset the targets registers then
408 a call to sim_create_inferior() should go here. */
414 /* Start an inferior process and set inferior_ptid to its pid.
415 EXEC_FILE is the file to run.
416 ARGS is a string containing the arguments to the program.
417 ENV is the environment vector to pass. Errors reported with error().
418 On VxWorks and various standalone systems, we ignore exec_file. */
419 /* This is called not only when we first attach, but also when the
420 user types "run" after having attached. */
423 gdbsim_create_inferior (char *exec_file
, char *args
, char **env
, int from_tty
)
426 char *arg_buf
, **argv
;
428 if (exec_file
== 0 || exec_bfd
== 0)
429 warning (_("No executable file specified."));
431 warning (_("No program loaded."));
434 printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
435 (exec_file
? exec_file
: "(NULL)"),
439 remove_breakpoints ();
440 init_wait_for_inferior ();
442 if (exec_file
!= NULL
)
444 len
= strlen (exec_file
) + 1 + strlen (args
) + 1 + /*slop */ 10;
445 arg_buf
= (char *) alloca (len
);
447 strcat (arg_buf
, exec_file
);
448 strcat (arg_buf
, " ");
449 strcat (arg_buf
, args
);
450 argv
= buildargv (arg_buf
);
451 make_cleanup_freeargv (argv
);
455 sim_create_inferior (gdbsim_desc
, exec_bfd
, argv
, env
);
457 inferior_ptid
= pid_to_ptid (42);
458 insert_breakpoints (); /* Needed to get correct instruction in cache */
460 clear_proceed_status ();
463 /* The open routine takes the rest of the parameters from the command,
464 and (if successful) pushes a new target onto the stack.
465 Targets should supply this routine, if only to provide an error message. */
466 /* Called when selecting the simulator. EG: (gdb) target sim name. */
469 gdbsim_open (char *args
, int from_tty
)
476 printf_filtered ("gdbsim_open: args \"%s\"\n", args
? args
: "(null)");
478 /* Remove current simulator if one exists. Only do this if the simulator
479 has been opened because sim_close requires it.
480 This is important because the call to push_target below will cause
481 sim_close to be called if the simulator is already open, but push_target
482 is called after sim_open! We can't move the call to push_target before
483 the call to sim_open because sim_open may invoke `error'. */
484 if (gdbsim_desc
!= NULL
)
485 unpush_target (&gdbsim_ops
);
487 len
= (7 + 1 /* gdbsim */
488 + strlen (" -E little")
489 + strlen (" --architecture=xxxxxxxxxx")
490 + (args
? strlen (args
) : 0)
492 arg_buf
= (char *) alloca (len
);
493 strcpy (arg_buf
, "gdbsim"); /* 7 */
494 /* Specify the byte order for the target when it is both selectable
495 and explicitly specified by the user (not auto detected). */
496 switch (selected_byte_order ())
499 strcat (arg_buf
, " -E big");
501 case BFD_ENDIAN_LITTLE
:
502 strcat (arg_buf
, " -E little");
504 case BFD_ENDIAN_UNKNOWN
:
507 /* Specify the architecture of the target when it has been
508 explicitly specified */
509 if (selected_architecture_name () != NULL
)
511 strcat (arg_buf
, " --architecture=");
512 strcat (arg_buf
, selected_architecture_name ());
514 /* finally, any explicit args */
517 strcat (arg_buf
, " "); /* 1 */
518 strcat (arg_buf
, args
);
520 argv
= buildargv (arg_buf
);
522 error (_("Insufficient memory available to allocate simulator arg list."));
523 make_cleanup_freeargv (argv
);
526 gdbsim_desc
= sim_open (SIM_OPEN_DEBUG
, &gdb_callback
, exec_bfd
, argv
);
528 if (gdbsim_desc
== 0)
529 error (_("unable to create simulator instance"));
531 push_target (&gdbsim_ops
);
532 target_fetch_registers (-1);
533 printf_filtered ("Connected to the simulator.\n");
536 /* Does whatever cleanup is required for a target that we are no longer
537 going to be calling. Argument says whether we are quitting gdb and
538 should not get hung in case of errors, or whether we want a clean
539 termination even if it takes a while. This routine is automatically
540 always called just before a routine is popped off the target stack.
541 Closing file descriptors and freeing memory are typical things it should
543 /* Close out all files and local state before this target loses control. */
546 gdbsim_close (int quitting
)
549 printf_filtered ("gdbsim_close: quitting %d\n", quitting
);
553 if (gdbsim_desc
!= NULL
)
555 sim_close (gdbsim_desc
, quitting
);
560 generic_mourn_inferior ();
563 /* Takes a program previously attached to and detaches it.
564 The program may resume execution (some targets do, some don't) and will
565 no longer stop on signals, etc. We better not have left any breakpoints
566 in the program or it'll die when it hits one. ARGS is arguments
567 typed by the user (e.g. a signal to send the process). FROM_TTY
568 says whether to be verbose or not. */
569 /* Terminate the open connection to the remote debugger.
570 Use this when you want to detach and do something else with your gdb. */
573 gdbsim_detach (char *args
, int from_tty
)
576 printf_filtered ("gdbsim_detach: args \"%s\"\n", args
);
578 pop_target (); /* calls gdbsim_close to do the real work */
580 printf_filtered ("Ending simulator %s debugging\n", target_shortname
);
583 /* Resume execution of the target process. STEP says whether to single-step
584 or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given
585 to the target, or zero for no signal. */
587 static enum target_signal resume_siggnal
;
588 static int resume_step
;
591 gdbsim_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
593 if (PIDGET (inferior_ptid
) != 42)
594 error (_("The program is not being run."));
597 printf_filtered ("gdbsim_resume: step %d, signal %d\n", step
, siggnal
);
599 resume_siggnal
= siggnal
;
603 /* Notify the simulator of an asynchronous request to stop.
605 The simulator shall ensure that the stop request is eventually
606 delivered to the simulator. If the call is made while the
607 simulator is not running then the stop request is processed when
608 the simulator is next resumed.
610 For simulators that do not support this operation, just abort */
615 if (!sim_stop (gdbsim_desc
))
621 /* GDB version of os_poll_quit callback.
622 Taken from gdb/util.c - should be in a library. */
625 gdb_os_poll_quit (host_callback
*p
)
627 if (deprecated_ui_loop_hook
!= NULL
)
628 deprecated_ui_loop_hook (0);
630 if (quit_flag
) /* gdb's idea of quit */
632 quit_flag
= 0; /* we've stolen it */
635 else if (immediate_quit
)
642 /* Wait for inferior process to do something. Return pid of child,
643 or -1 in case of error; store status through argument pointer STATUS,
644 just as `wait' would. */
647 gdbsim_cntrl_c (int signo
)
653 gdbsim_wait (ptid_t ptid
, struct target_waitstatus
*status
)
655 static RETSIGTYPE (*prev_sigint
) ();
657 enum sim_stop reason
= sim_running
;
660 printf_filtered ("gdbsim_wait\n");
662 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
664 struct sigaction sa
, osa
;
665 sa
.sa_handler
= gdbsim_cntrl_c
;
666 sigemptyset (&sa
.sa_mask
);
668 sigaction (SIGINT
, &sa
, &osa
);
669 prev_sigint
= osa
.sa_handler
;
672 prev_sigint
= signal (SIGINT
, gdbsim_cntrl_c
);
674 sim_resume (gdbsim_desc
, resume_step
, resume_siggnal
);
675 signal (SIGINT
, prev_sigint
);
678 sim_stop_reason (gdbsim_desc
, &reason
, &sigrc
);
683 status
->kind
= TARGET_WAITKIND_EXITED
;
684 status
->value
.integer
= sigrc
;
689 case TARGET_SIGNAL_ABRT
:
692 case TARGET_SIGNAL_INT
:
693 case TARGET_SIGNAL_TRAP
:
695 status
->kind
= TARGET_WAITKIND_STOPPED
;
696 status
->value
.sig
= sigrc
;
701 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
702 status
->value
.sig
= sigrc
;
706 /* FIXME: Is this correct? */
710 return inferior_ptid
;
713 /* Get ready to modify the registers array. On machines which store
714 individual registers, this doesn't need to do anything. On machines
715 which store all the registers in one fell swoop, this makes sure
716 that registers contains all the registers from the program being
720 gdbsim_prepare_to_store (void)
722 /* Do nothing, since we can store individual regs */
725 /* Transfer LEN bytes between GDB address MYADDR and target address
726 MEMADDR. If WRITE is non-zero, transfer them to the target,
727 otherwise transfer them from the target. TARGET is unused.
729 Returns the number of bytes transferred. */
732 gdbsim_xfer_inferior_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
,
733 int write
, struct mem_attrib
*attrib
,
734 struct target_ops
*target
)
737 error (_("No program loaded."));
741 /* FIXME: Send to something other than STDOUT? */
742 printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x");
743 gdb_print_host_address (myaddr
, gdb_stdout
);
744 printf_filtered (", memaddr 0x%s, len %d, write %d\n",
745 paddr_nz (memaddr
), len
, write
);
746 if (sr_get_debug () && write
)
747 dump_mem (myaddr
, len
);
752 len
= sim_write (gdbsim_desc
, memaddr
, myaddr
, len
);
756 len
= sim_read (gdbsim_desc
, memaddr
, myaddr
, len
);
757 if (sr_get_debug () && len
> 0)
758 dump_mem (myaddr
, len
);
764 gdbsim_files_info (struct target_ops
*target
)
766 char *file
= "nothing";
769 file
= bfd_get_filename (exec_bfd
);
772 printf_filtered ("gdbsim_files_info: file \"%s\"\n", file
);
776 printf_filtered ("\tAttached to %s running program %s\n",
777 target_shortname
, file
);
778 sim_info (gdbsim_desc
, 0);
782 /* Clear the simulator's notion of what the break points are. */
785 gdbsim_mourn_inferior (void)
788 printf_filtered ("gdbsim_mourn_inferior:\n");
790 remove_breakpoints ();
791 generic_mourn_inferior ();
795 gdbsim_insert_breakpoint (CORE_ADDR addr
, bfd_byte
*contents_cache
)
797 return memory_insert_breakpoint (addr
, contents_cache
);
801 gdbsim_remove_breakpoint (CORE_ADDR addr
, bfd_byte
*contents_cache
)
803 return memory_remove_breakpoint (addr
, contents_cache
);
806 /* Pass the command argument through to the simulator verbatim. The
807 simulator must do any command interpretation work. */
810 simulator_command (char *args
, int from_tty
)
812 if (gdbsim_desc
== NULL
)
815 /* PREVIOUSLY: The user may give a command before the simulator
816 is opened. [...] (??? assuming of course one wishes to
817 continue to allow commands to be sent to unopened simulators,
818 which isn't entirely unreasonable). */
820 /* The simulator is a builtin abstraction of a remote target.
821 Consistent with that model, access to the simulator, via sim
822 commands, is restricted to the period when the channel to the
823 simulator is open. */
825 error (_("Not connected to the simulator target"));
828 sim_do_command (gdbsim_desc
, args
);
830 /* Invalidate the register cache, in case the simulator command does
832 registers_changed ();
835 /* Define the target subroutine names */
837 struct target_ops gdbsim_ops
;
840 init_gdbsim_ops (void)
842 gdbsim_ops
.to_shortname
= "sim";
843 gdbsim_ops
.to_longname
= "simulator";
844 gdbsim_ops
.to_doc
= "Use the compiled-in simulator.";
845 gdbsim_ops
.to_open
= gdbsim_open
;
846 gdbsim_ops
.to_close
= gdbsim_close
;
847 gdbsim_ops
.to_detach
= gdbsim_detach
;
848 gdbsim_ops
.to_resume
= gdbsim_resume
;
849 gdbsim_ops
.to_wait
= gdbsim_wait
;
850 gdbsim_ops
.to_fetch_registers
= gdbsim_fetch_register
;
851 gdbsim_ops
.to_store_registers
= gdbsim_store_register
;
852 gdbsim_ops
.to_prepare_to_store
= gdbsim_prepare_to_store
;
853 gdbsim_ops
.deprecated_xfer_memory
= gdbsim_xfer_inferior_memory
;
854 gdbsim_ops
.to_files_info
= gdbsim_files_info
;
855 gdbsim_ops
.to_insert_breakpoint
= gdbsim_insert_breakpoint
;
856 gdbsim_ops
.to_remove_breakpoint
= gdbsim_remove_breakpoint
;
857 gdbsim_ops
.to_kill
= gdbsim_kill
;
858 gdbsim_ops
.to_load
= gdbsim_load
;
859 gdbsim_ops
.to_create_inferior
= gdbsim_create_inferior
;
860 gdbsim_ops
.to_mourn_inferior
= gdbsim_mourn_inferior
;
861 gdbsim_ops
.to_stop
= gdbsim_stop
;
862 gdbsim_ops
.to_stratum
= process_stratum
;
863 gdbsim_ops
.to_has_all_memory
= 1;
864 gdbsim_ops
.to_has_memory
= 1;
865 gdbsim_ops
.to_has_stack
= 1;
866 gdbsim_ops
.to_has_registers
= 1;
867 gdbsim_ops
.to_has_execution
= 1;
868 gdbsim_ops
.to_magic
= OPS_MAGIC
;
870 #ifdef TARGET_REDEFINE_DEFAULT_OPS
871 TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops
);
876 _initialize_remote_sim (void)
879 add_target (&gdbsim_ops
);
881 add_com ("sim", class_obscure
, simulator_command
,
882 _("Send a command to the simulator."));