1 /* Generic remote debugging interface for simulators.
2 Copyright 1993, 1994, 1996, 1997, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Support.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
27 #include "gdb_string.h"
37 #include "remote-sim.h"
38 #include "remote-utils.h"
43 extern void _initialize_remote_sim (void);
45 extern int (*ui_loop_hook) (int signo);
47 static void dump_mem (char *buf, int len);
49 static void init_callbacks (void);
51 static void end_callbacks (void);
53 static int gdb_os_write_stdout (host_callback *, const char *, int);
55 static void gdb_os_flush_stdout (host_callback *);
57 static int gdb_os_write_stderr (host_callback *, const char *, int);
59 static void gdb_os_flush_stderr (host_callback *);
61 static int gdb_os_poll_quit (host_callback *);
63 /* printf_filtered is depreciated */
64 static void gdb_os_printf_filtered (host_callback *, const char *, ...);
66 static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list);
68 static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list);
70 static void gdb_os_error (host_callback *, const char *, ...);
72 static void gdbsim_fetch_register (int regno);
74 static void gdbsim_store_register (int regno);
76 static void gdbsim_kill (void);
78 static void gdbsim_load (char *prog, int fromtty);
80 static void gdbsim_create_inferior (char *exec_file, char *args, char **env);
82 static void gdbsim_open (char *args, int from_tty);
84 static void gdbsim_close (int quitting);
86 static void gdbsim_detach (char *args, int from_tty);
88 static void gdbsim_resume (int pid, int step, enum target_signal siggnal);
90 static int gdbsim_wait (int pid, struct target_waitstatus *status);
92 static void gdbsim_prepare_to_store (void);
94 static int gdbsim_xfer_inferior_memory (CORE_ADDR memaddr,
95 char *myaddr, int len,
96 int write, struct target_ops *target);
98 static void gdbsim_files_info (struct target_ops *target);
100 static void gdbsim_mourn_inferior (void);
102 static void gdbsim_stop (void);
104 void simulator_command (char *args, int from_tty);
106 /* Naming convention:
108 sim_* are the interface to the simulator (see remote-sim.h).
109 gdbsim_* are stuff which is internal to gdb. */
111 /* Forward data declarations */
112 extern struct target_ops gdbsim_ops;
114 static int program_loaded = 0;
116 /* We must keep track of whether the simulator has been opened or not because
117 GDB can call a target's close routine twice, but sim_close doesn't allow
118 this. We also need to record the result of sim_open so we can pass it
119 back to the other sim_foo routines. */
120 static SIM_DESC gdbsim_desc = 0;
129 if (len == 8 || len == 4)
132 memcpy (l, buf, len);
133 printf_filtered ("\t0x%lx", l[0]);
134 printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]);
139 printf_filtered ("\t");
140 for (i = 0; i < len; i++)
141 printf_filtered ("0x%x ", buf[i]);
142 printf_filtered ("\n");
147 static host_callback gdb_callback;
148 static int callbacks_initialized = 0;
150 /* Initialize gdb_callback. */
155 if (!callbacks_initialized)
157 gdb_callback = default_callback;
158 gdb_callback.init (&gdb_callback);
159 gdb_callback.write_stdout = gdb_os_write_stdout;
160 gdb_callback.flush_stdout = gdb_os_flush_stdout;
161 gdb_callback.write_stderr = gdb_os_write_stderr;
162 gdb_callback.flush_stderr = gdb_os_flush_stderr;
163 gdb_callback.printf_filtered = gdb_os_printf_filtered;
164 gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered;
165 gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered;
166 gdb_callback.error = gdb_os_error;
167 gdb_callback.poll_quit = gdb_os_poll_quit;
168 gdb_callback.magic = HOST_CALLBACK_MAGIC;
169 callbacks_initialized = 1;
173 /* Release callbacks (free resources used by them). */
178 if (callbacks_initialized)
180 gdb_callback.shutdown (&gdb_callback);
181 callbacks_initialized = 0;
185 /* GDB version of os_write_stdout callback. */
188 gdb_os_write_stdout (p, buf, len)
196 ui_file_write (gdb_stdtarg, buf, len);
200 /* GDB version of os_flush_stdout callback. */
203 gdb_os_flush_stdout (p)
206 gdb_flush (gdb_stdtarg);
209 /* GDB version of os_write_stderr callback. */
212 gdb_os_write_stderr (p, buf, len)
220 for (i = 0; i < len; i++)
224 fputs_unfiltered (b, gdb_stdtarg);
229 /* GDB version of os_flush_stderr callback. */
232 gdb_os_flush_stderr (p)
235 gdb_flush (gdb_stderr);
238 /* GDB version of printf_filtered callback. */
241 gdb_os_printf_filtered (host_callback * p, const char *format,...)
244 va_start (args, format);
246 vfprintf_filtered (gdb_stdout, format, args);
251 /* GDB version of error vprintf_filtered. */
254 gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap)
256 vfprintf_filtered (gdb_stdout, format, ap);
259 /* GDB version of error evprintf_filtered. */
262 gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap)
264 vfprintf_filtered (gdb_stderr, format, ap);
267 /* GDB version of error callback. */
270 gdb_os_error (host_callback * p, const char *format,...)
277 va_start (args, format);
278 verror (format, args);
283 #ifndef REGISTER_SIM_REGNO
284 #define REGISTER_SIM_REGNO(N) (N)
288 gdbsim_fetch_register (regno)
291 static int warn_user = 1;
294 for (regno = 0; regno < NUM_REGS; regno++)
295 gdbsim_fetch_register (regno);
297 else if (REGISTER_NAME (regno) != NULL
298 && *REGISTER_NAME (regno) != '\0')
300 char buf[MAX_REGISTER_RAW_SIZE];
302 if (REGISTER_SIM_REGNO (regno) >= 0)
303 nr_bytes = sim_fetch_register (gdbsim_desc,
304 REGISTER_SIM_REGNO (regno),
305 buf, REGISTER_RAW_SIZE (regno));
309 /* register not applicable, supply zero's */
310 memset (buf, 0, MAX_REGISTER_RAW_SIZE);
311 else if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno)
314 fprintf_unfiltered (gdb_stderr,
315 "Size of register %s (%d/%d) incorrect (%d instead of %d))",
316 REGISTER_NAME (regno),
317 regno, REGISTER_SIM_REGNO (regno),
318 nr_bytes, REGISTER_RAW_SIZE (regno));
321 supply_register (regno, buf);
324 printf_filtered ("gdbsim_fetch_register: %d", regno);
325 /* FIXME: We could print something more intelligible. */
326 dump_mem (buf, REGISTER_RAW_SIZE (regno));
333 gdbsim_store_register (regno)
338 for (regno = 0; regno < NUM_REGS; regno++)
339 gdbsim_store_register (regno);
341 else if (REGISTER_NAME (regno) != NULL
342 && *REGISTER_NAME (regno) != '\0'
343 && REGISTER_SIM_REGNO (regno) >= 0)
345 char tmp[MAX_REGISTER_RAW_SIZE];
347 read_register_gen (regno, tmp);
348 nr_bytes = sim_store_register (gdbsim_desc,
349 REGISTER_SIM_REGNO (regno),
350 tmp, REGISTER_RAW_SIZE (regno));
351 if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno))
352 internal_error ("Register size different to expected");
355 printf_filtered ("gdbsim_store_register: %d", regno);
356 /* FIXME: We could print something more intelligible. */
357 dump_mem (tmp, REGISTER_RAW_SIZE (regno));
362 /* Kill the running program. This may involve closing any open files
363 and releasing other resources acquired by the simulated program. */
369 printf_filtered ("gdbsim_kill\n");
371 /* There is no need to `kill' running simulator - the simulator is
376 /* Load an executable file into the target process. This is expected to
377 not only bring new code into the target process, but also to update
378 GDB's symbol tables to match. */
381 gdbsim_load (prog, fromtty)
386 printf_filtered ("gdbsim_load: prog \"%s\"\n", prog);
390 /* FIXME: We will print two messages on error.
391 Need error to either not print anything if passed NULL or need
392 another routine that doesn't take any arguments. */
393 if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL)
394 error ("unable to load program");
396 /* FIXME: If a load command should reset the targets registers then
397 a call to sim_create_inferior() should go here. */
403 /* Start an inferior process and set inferior_pid to its pid.
404 EXEC_FILE is the file to run.
405 ARGS is a string containing the arguments to the program.
406 ENV is the environment vector to pass. Errors reported with error().
407 On VxWorks and various standalone systems, we ignore exec_file. */
408 /* This is called not only when we first attach, but also when the
409 user types "run" after having attached. */
412 gdbsim_create_inferior (exec_file, args, env)
418 char *arg_buf, **argv;
420 if (exec_file == 0 || exec_bfd == 0)
421 warning ("No executable file specified.");
423 warning ("No program loaded.");
426 printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
427 (exec_file ? exec_file : "(NULL)"),
431 remove_breakpoints ();
432 init_wait_for_inferior ();
434 if (exec_file != NULL)
436 len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10;
437 arg_buf = (char *) alloca (len);
439 strcat (arg_buf, exec_file);
440 strcat (arg_buf, " ");
441 strcat (arg_buf, args);
442 argv = buildargv (arg_buf);
443 make_cleanup_freeargv (argv);
447 sim_create_inferior (gdbsim_desc, exec_bfd, argv, env);
450 insert_breakpoints (); /* Needed to get correct instruction in cache */
452 clear_proceed_status ();
454 /* NB: Entry point already set by sim_create_inferior. */
455 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
458 /* The open routine takes the rest of the parameters from the command,
459 and (if successful) pushes a new target onto the stack.
460 Targets should supply this routine, if only to provide an error message. */
461 /* Called when selecting the simulator. EG: (gdb) target sim name. */
464 gdbsim_open (args, from_tty)
473 printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)");
475 /* Remove current simulator if one exists. Only do this if the simulator
476 has been opened because sim_close requires it.
477 This is important because the call to push_target below will cause
478 sim_close to be called if the simulator is already open, but push_target
479 is called after sim_open! We can't move the call to push_target before
480 the call to sim_open because sim_open may invoke `error'. */
481 if (gdbsim_desc != NULL)
482 unpush_target (&gdbsim_ops);
484 len = (7 + 1 /* gdbsim */
485 + strlen (" -E little")
486 + strlen (" --architecture=xxxxxxxxxx")
487 + (args ? strlen (args) : 0)
489 arg_buf = (char *) alloca (len);
490 strcpy (arg_buf, "gdbsim"); /* 7 */
491 /* Specify the byte order for the target when it is both selectable
492 and explicitly specified by the user (not auto detected). */
493 if (TARGET_BYTE_ORDER_SELECTABLE_P
494 && !TARGET_BYTE_ORDER_AUTO)
496 switch (TARGET_BYTE_ORDER)
499 strcat (arg_buf, " -E big");
502 strcat (arg_buf, " -E little");
505 internal_error ("Value of TARGET_BYTE_ORDER unknown");
508 /* Specify the architecture of the target when it has been
509 explicitly specified */
510 if (!TARGET_ARCHITECTURE_AUTO)
512 strcat (arg_buf, " --architecture=");
513 strcat (arg_buf, TARGET_ARCHITECTURE->printable_name);
515 /* finally, any explicit args */
518 strcat (arg_buf, " "); /* 1 */
519 strcat (arg_buf, args);
521 argv = buildargv (arg_buf);
523 error ("Insufficient memory available to allocate simulator arg list.");
524 make_cleanup_freeargv (argv);
527 gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv);
529 if (gdbsim_desc == 0)
530 error ("unable to create simulator instance");
532 push_target (&gdbsim_ops);
533 target_fetch_registers (-1);
534 printf_filtered ("Connected to the simulator.\n");
537 /* Does whatever cleanup is required for a target that we are no longer
538 going to be calling. Argument says whether we are quitting gdb and
539 should not get hung in case of errors, or whether we want a clean
540 termination even if it takes a while. This routine is automatically
541 always called just before a routine is popped off the target stack.
542 Closing file descriptors and freeing memory are typical things it should
544 /* Close out all files and local state before this target loses control. */
547 gdbsim_close (quitting)
551 printf_filtered ("gdbsim_close: quitting %d\n", quitting);
555 if (gdbsim_desc != NULL)
557 sim_close (gdbsim_desc, quitting);
562 generic_mourn_inferior ();
565 /* Takes a program previously attached to and detaches it.
566 The program may resume execution (some targets do, some don't) and will
567 no longer stop on signals, etc. We better not have left any breakpoints
568 in the program or it'll die when it hits one. ARGS is arguments
569 typed by the user (e.g. a signal to send the process). FROM_TTY
570 says whether to be verbose or not. */
571 /* Terminate the open connection to the remote debugger.
572 Use this when you want to detach and do something else with your gdb. */
575 gdbsim_detach (args, from_tty)
580 printf_filtered ("gdbsim_detach: args \"%s\"\n", args);
582 pop_target (); /* calls gdbsim_close to do the real work */
584 printf_filtered ("Ending simulator %s debugging\n", target_shortname);
587 /* Resume execution of the target process. STEP says whether to single-step
588 or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given
589 to the target, or zero for no signal. */
591 static enum target_signal resume_siggnal;
592 static int resume_step;
595 gdbsim_resume (pid, step, siggnal)
597 enum target_signal siggnal;
599 if (inferior_pid != 42)
600 error ("The program is not being run.");
603 printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal);
605 resume_siggnal = siggnal;
609 /* Notify the simulator of an asynchronous request to stop.
611 The simulator shall ensure that the stop request is eventually
612 delivered to the simulator. If the call is made while the
613 simulator is not running then the stop request is processed when
614 the simulator is next resumed.
616 For simulators that do not support this operation, just abort */
621 if (!sim_stop (gdbsim_desc))
627 /* GDB version of os_poll_quit callback.
628 Taken from gdb/util.c - should be in a library */
634 if (ui_loop_hook != NULL)
638 if (quit_flag) /* gdb's idea of quit */
640 quit_flag = 0; /* we've stolen it */
643 else if (immediate_quit)
650 /* Wait for inferior process to do something. Return pid of child,
651 or -1 in case of error; store status through argument pointer STATUS,
652 just as `wait' would. */
655 gdbsim_cntrl_c (signo)
662 gdbsim_wait (pid, status)
664 struct target_waitstatus *status;
666 static RETSIGTYPE (*prev_sigint) ();
668 enum sim_stop reason = sim_running;
671 printf_filtered ("gdbsim_wait\n");
673 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
675 struct sigaction sa, osa;
676 sa.sa_handler = gdbsim_cntrl_c;
677 sigemptyset (&sa.sa_mask);
679 sigaction (SIGINT, &sa, &osa);
680 prev_sigint = osa.sa_handler;
683 prev_sigint = signal (SIGINT, gdbsim_cntrl_c);
685 sim_resume (gdbsim_desc, resume_step,
686 target_signal_to_host (resume_siggnal));
687 signal (SIGINT, prev_sigint);
690 sim_stop_reason (gdbsim_desc, &reason, &sigrc);
695 status->kind = TARGET_WAITKIND_EXITED;
696 status->value.integer = sigrc;
707 status->kind = TARGET_WAITKIND_STOPPED;
708 /* The signal in sigrc is a host signal. That probably
710 status->value.sig = target_signal_from_host (sigrc);
715 status->kind = TARGET_WAITKIND_SIGNALLED;
716 /* The signal in sigrc is a host signal. That probably
718 status->value.sig = target_signal_from_host (sigrc);
722 /* FIXME: Is this correct? */
729 /* Get ready to modify the registers array. On machines which store
730 individual registers, this doesn't need to do anything. On machines
731 which store all the registers in one fell swoop, this makes sure
732 that registers contains all the registers from the program being
736 gdbsim_prepare_to_store ()
738 /* Do nothing, since we can store individual regs */
742 gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target)
747 struct target_ops *target; /* ignored */
750 error ("No program loaded.");
754 /* FIXME: Send to something other than STDOUT? */
755 printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x");
756 gdb_print_host_address (myaddr, gdb_stdout);
757 printf_filtered (", memaddr 0x%s, len %d, write %d\n",
758 paddr_nz (memaddr), len, write);
759 if (sr_get_debug () && write)
760 dump_mem (myaddr, len);
765 len = sim_write (gdbsim_desc, memaddr, myaddr, len);
769 len = sim_read (gdbsim_desc, memaddr, myaddr, len);
770 if (sr_get_debug () && len > 0)
771 dump_mem (myaddr, len);
777 gdbsim_files_info (target)
778 struct target_ops *target;
780 char *file = "nothing";
783 file = bfd_get_filename (exec_bfd);
786 printf_filtered ("gdbsim_files_info: file \"%s\"\n", file);
790 printf_filtered ("\tAttached to %s running program %s\n",
791 target_shortname, file);
792 sim_info (gdbsim_desc, 0);
796 /* Clear the simulator's notion of what the break points are. */
799 gdbsim_mourn_inferior ()
802 printf_filtered ("gdbsim_mourn_inferior:\n");
804 remove_breakpoints ();
805 generic_mourn_inferior ();
809 gdbsim_insert_breakpoint (addr, contents_cache)
811 char *contents_cache;
813 #ifdef SIM_HAS_BREAKPOINTS
816 retcode = sim_set_breakpoint (gdbsim_desc, addr);
822 case SIM_RC_INSUFFICIENT_RESOURCES:
828 return memory_insert_breakpoint (addr, contents_cache);
833 gdbsim_remove_breakpoint (addr, contents_cache)
835 char *contents_cache;
837 #ifdef SIM_HAS_BREAKPOINTS
840 retcode = sim_clear_breakpoint (gdbsim_desc, addr);
845 case SIM_RC_UNKNOWN_BREAKPOINT:
847 case SIM_RC_INSUFFICIENT_RESOURCES:
853 return memory_remove_breakpoint (addr, contents_cache);
857 /* Pass the command argument through to the simulator verbatim. The
858 simulator must do any command interpretation work. */
861 simulator_command (args, from_tty)
865 if (gdbsim_desc == NULL)
868 /* PREVIOUSLY: The user may give a command before the simulator
869 is opened. [...] (??? assuming of course one wishes to
870 continue to allow commands to be sent to unopened simulators,
871 which isn't entirely unreasonable). */
873 /* The simulator is a builtin abstraction of a remote target.
874 Consistent with that model, access to the simulator, via sim
875 commands, is restricted to the period when the channel to the
876 simulator is open. */
878 error ("Not connected to the simulator target");
881 sim_do_command (gdbsim_desc, args);
883 /* Invalidate the register cache, in case the simulator command does
885 registers_changed ();
888 /* Define the target subroutine names */
890 struct target_ops gdbsim_ops;
893 init_gdbsim_ops (void)
895 gdbsim_ops.to_shortname = "sim";
896 gdbsim_ops.to_longname = "simulator";
897 gdbsim_ops.to_doc = "Use the compiled-in simulator.";
898 gdbsim_ops.to_open = gdbsim_open;
899 gdbsim_ops.to_close = gdbsim_close;
900 gdbsim_ops.to_attach = NULL;
901 gdbsim_ops.to_post_attach = NULL;
902 gdbsim_ops.to_require_attach = NULL;
903 gdbsim_ops.to_detach = gdbsim_detach;
904 gdbsim_ops.to_require_detach = NULL;
905 gdbsim_ops.to_resume = gdbsim_resume;
906 gdbsim_ops.to_wait = gdbsim_wait;
907 gdbsim_ops.to_post_wait = NULL;
908 gdbsim_ops.to_fetch_registers = gdbsim_fetch_register;
909 gdbsim_ops.to_store_registers = gdbsim_store_register;
910 gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store;
911 gdbsim_ops.to_xfer_memory = gdbsim_xfer_inferior_memory;
912 gdbsim_ops.to_files_info = gdbsim_files_info;
913 gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint;
914 gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint;
915 gdbsim_ops.to_terminal_init = NULL;
916 gdbsim_ops.to_terminal_inferior = NULL;
917 gdbsim_ops.to_terminal_ours_for_output = NULL;
918 gdbsim_ops.to_terminal_ours = NULL;
919 gdbsim_ops.to_terminal_info = NULL;
920 gdbsim_ops.to_kill = gdbsim_kill;
921 gdbsim_ops.to_load = gdbsim_load;
922 gdbsim_ops.to_lookup_symbol = NULL;
923 gdbsim_ops.to_create_inferior = gdbsim_create_inferior;
924 gdbsim_ops.to_post_startup_inferior = NULL;
925 gdbsim_ops.to_acknowledge_created_inferior = NULL;
926 gdbsim_ops.to_clone_and_follow_inferior = NULL;
927 gdbsim_ops.to_post_follow_inferior_by_clone = NULL;
928 gdbsim_ops.to_insert_fork_catchpoint = NULL;
929 gdbsim_ops.to_remove_fork_catchpoint = NULL;
930 gdbsim_ops.to_insert_vfork_catchpoint = NULL;
931 gdbsim_ops.to_remove_vfork_catchpoint = NULL;
932 gdbsim_ops.to_has_forked = NULL;
933 gdbsim_ops.to_has_vforked = NULL;
934 gdbsim_ops.to_can_follow_vfork_prior_to_exec = NULL;
935 gdbsim_ops.to_post_follow_vfork = NULL;
936 gdbsim_ops.to_insert_exec_catchpoint = NULL;
937 gdbsim_ops.to_remove_exec_catchpoint = NULL;
938 gdbsim_ops.to_has_execd = NULL;
939 gdbsim_ops.to_reported_exec_events_per_exec_call = NULL;
940 gdbsim_ops.to_has_exited = NULL;
941 gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior;
942 gdbsim_ops.to_can_run = 0;
943 gdbsim_ops.to_notice_signals = 0;
944 gdbsim_ops.to_thread_alive = 0;
945 gdbsim_ops.to_stop = gdbsim_stop;
946 gdbsim_ops.to_pid_to_exec_file = NULL;
947 gdbsim_ops.to_core_file_to_sym_file = NULL;
948 gdbsim_ops.to_stratum = process_stratum;
949 gdbsim_ops.DONT_USE = NULL;
950 gdbsim_ops.to_has_all_memory = 1;
951 gdbsim_ops.to_has_memory = 1;
952 gdbsim_ops.to_has_stack = 1;
953 gdbsim_ops.to_has_registers = 1;
954 gdbsim_ops.to_has_execution = 1;
955 gdbsim_ops.to_sections = NULL;
956 gdbsim_ops.to_sections_end = NULL;
957 gdbsim_ops.to_magic = OPS_MAGIC;
959 #ifdef TARGET_REDEFINE_DEFAULT_OPS
960 TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops);
965 _initialize_remote_sim ()
968 add_target (&gdbsim_ops);
970 add_com ("sim <command>", class_obscure, simulator_command,
971 "Send a command to the simulator.");