Commit | Line | Data |
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c906108c SS |
1 | /* Generic remote debugging interface for simulators. |
2 | Copyright 1993, 1994, 1996, 1997 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. | |
4 | Steve Chamberlain (sac@cygnus.com). | |
5 | ||
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
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. | |
c906108c | 12 | |
c5aa993b JM |
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. | |
c906108c | 17 | |
c5aa993b JM |
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. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "inferior.h" | |
25 | #include "wait.h" | |
26 | #include "value.h" | |
27 | #include "gdb_string.h" | |
28 | #include <ctype.h> | |
29 | #include <fcntl.h> | |
30 | #include <signal.h> | |
31 | #include <setjmp.h> | |
32 | #include <errno.h> | |
33 | #include "terminal.h" | |
34 | #include "target.h" | |
35 | #include "gdbcore.h" | |
36 | #include "callback.h" | |
37 | #include "remote-sim.h" | |
38 | #include "remote-utils.h" | |
39 | #include "command.h" | |
40 | ||
41 | /* Prototypes */ | |
42 | ||
392a587b JM |
43 | extern void _initialize_remote_sim PARAMS ((void)); |
44 | ||
7a292a7a SS |
45 | extern int (*ui_loop_hook) PARAMS ((int signo)); |
46 | ||
c906108c SS |
47 | static void dump_mem PARAMS ((char *buf, int len)); |
48 | ||
49 | static void init_callbacks PARAMS ((void)); | |
50 | ||
51 | static void end_callbacks PARAMS ((void)); | |
52 | ||
53 | static int gdb_os_write_stdout PARAMS ((host_callback *, const char *, int)); | |
54 | ||
55 | static void gdb_os_flush_stdout PARAMS ((host_callback *)); | |
56 | ||
57 | static int gdb_os_write_stderr PARAMS ((host_callback *, const char *, int)); | |
58 | ||
59 | static void gdb_os_flush_stderr PARAMS ((host_callback *)); | |
60 | ||
61 | static int gdb_os_poll_quit PARAMS ((host_callback *)); | |
62 | ||
63 | /* printf_filtered is depreciated */ | |
c5aa993b | 64 | static void gdb_os_printf_filtered PARAMS ((host_callback *, const char *,...)); |
c906108c SS |
65 | |
66 | static void gdb_os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list)); | |
67 | ||
68 | static void gdb_os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list)); | |
69 | ||
c5aa993b | 70 | static void gdb_os_error PARAMS ((host_callback *, const char *,...)); |
c906108c SS |
71 | |
72 | static void gdbsim_fetch_register PARAMS ((int regno)); | |
73 | ||
74 | static void gdbsim_store_register PARAMS ((int regno)); | |
75 | ||
76 | static void gdbsim_kill PARAMS ((void)); | |
77 | ||
78 | static void gdbsim_load PARAMS ((char *prog, int fromtty)); | |
79 | ||
80 | static void gdbsim_create_inferior PARAMS ((char *exec_file, char *args, char **env)); | |
81 | ||
82 | static void gdbsim_open PARAMS ((char *args, int from_tty)); | |
83 | ||
84 | static void gdbsim_close PARAMS ((int quitting)); | |
85 | ||
86 | static void gdbsim_detach PARAMS ((char *args, int from_tty)); | |
87 | ||
88 | static void gdbsim_resume PARAMS ((int pid, int step, enum target_signal siggnal)); | |
89 | ||
c5aa993b | 90 | static int gdbsim_wait PARAMS ((int pid, struct target_waitstatus * status)); |
c906108c SS |
91 | |
92 | static void gdbsim_prepare_to_store PARAMS ((void)); | |
93 | ||
94 | static int gdbsim_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr, | |
95 | char *myaddr, int len, | |
96 | int write, | |
c5aa993b | 97 | struct target_ops * target)); |
c906108c | 98 | |
c5aa993b | 99 | static void gdbsim_files_info PARAMS ((struct target_ops * target)); |
c906108c SS |
100 | |
101 | static void gdbsim_mourn_inferior PARAMS ((void)); | |
102 | ||
103 | static void gdbsim_stop PARAMS ((void)); | |
104 | ||
105 | void simulator_command PARAMS ((char *args, int from_tty)); | |
106 | ||
107 | /* Naming convention: | |
108 | ||
109 | sim_* are the interface to the simulator (see remote-sim.h). | |
110 | gdbsim_* are stuff which is internal to gdb. */ | |
111 | ||
112 | /* Forward data declarations */ | |
113 | extern struct target_ops gdbsim_ops; | |
114 | ||
115 | static int program_loaded = 0; | |
116 | ||
117 | /* We must keep track of whether the simulator has been opened or not because | |
118 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
119 | this. We also need to record the result of sim_open so we can pass it | |
120 | back to the other sim_foo routines. */ | |
121 | static SIM_DESC gdbsim_desc = 0; | |
122 | ||
123 | static void | |
124 | dump_mem (buf, len) | |
125 | char *buf; | |
126 | int len; | |
127 | { | |
128 | if (len <= 8) | |
129 | { | |
130 | if (len == 8 || len == 4) | |
131 | { | |
132 | long l[2]; | |
133 | memcpy (l, buf, len); | |
134 | printf_filtered ("\t0x%x", l[0]); | |
135 | printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]); | |
136 | } | |
137 | else | |
138 | { | |
139 | int i; | |
140 | printf_filtered ("\t"); | |
141 | for (i = 0; i < len; i++) | |
142 | printf_filtered ("0x%x ", buf[i]); | |
143 | printf_filtered ("\n"); | |
144 | } | |
145 | } | |
146 | } | |
147 | ||
148 | static host_callback gdb_callback; | |
149 | static int callbacks_initialized = 0; | |
150 | ||
151 | /* Initialize gdb_callback. */ | |
152 | ||
153 | static void | |
154 | init_callbacks () | |
155 | { | |
c5aa993b | 156 | if (!callbacks_initialized) |
c906108c SS |
157 | { |
158 | gdb_callback = default_callback; | |
159 | gdb_callback.init (&gdb_callback); | |
160 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
161 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
162 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
163 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
164 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
165 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
166 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
167 | gdb_callback.error = gdb_os_error; | |
168 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
169 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
170 | callbacks_initialized = 1; | |
171 | } | |
172 | } | |
173 | ||
174 | /* Release callbacks (free resources used by them). */ | |
175 | ||
176 | static void | |
177 | end_callbacks () | |
178 | { | |
179 | if (callbacks_initialized) | |
180 | { | |
181 | gdb_callback.shutdown (&gdb_callback); | |
182 | callbacks_initialized = 0; | |
183 | } | |
184 | } | |
185 | ||
186 | /* GDB version of os_write_stdout callback. */ | |
187 | ||
c5aa993b | 188 | static int |
c906108c SS |
189 | gdb_os_write_stdout (p, buf, len) |
190 | host_callback *p; | |
191 | const char *buf; | |
192 | int len; | |
193 | { | |
194 | int i; | |
195 | char b[2]; | |
196 | ||
c5aa993b | 197 | for (i = 0; i < len; i++) |
c906108c SS |
198 | { |
199 | b[0] = buf[i]; | |
200 | b[1] = 0; | |
43ff13b4 | 201 | fputs_unfiltered (b, gdb_stdtarg); |
c906108c SS |
202 | } |
203 | return len; | |
204 | } | |
205 | ||
206 | /* GDB version of os_flush_stdout callback. */ | |
207 | ||
208 | static void | |
209 | gdb_os_flush_stdout (p) | |
210 | host_callback *p; | |
211 | { | |
212 | gdb_flush (gdb_stdout); | |
213 | } | |
214 | ||
215 | /* GDB version of os_write_stderr callback. */ | |
216 | ||
c5aa993b | 217 | static int |
c906108c SS |
218 | gdb_os_write_stderr (p, buf, len) |
219 | host_callback *p; | |
220 | const char *buf; | |
221 | int len; | |
222 | { | |
223 | int i; | |
224 | char b[2]; | |
225 | ||
c5aa993b | 226 | for (i = 0; i < len; i++) |
c906108c SS |
227 | { |
228 | b[0] = buf[i]; | |
229 | b[1] = 0; | |
43ff13b4 | 230 | fputs_unfiltered (b, gdb_stdtarg); |
c906108c SS |
231 | } |
232 | return len; | |
233 | } | |
234 | ||
235 | /* GDB version of os_flush_stderr callback. */ | |
236 | ||
237 | static void | |
238 | gdb_os_flush_stderr (p) | |
239 | host_callback *p; | |
240 | { | |
241 | gdb_flush (gdb_stderr); | |
242 | } | |
243 | ||
244 | /* GDB version of printf_filtered callback. */ | |
245 | ||
c906108c | 246 | static void |
c5aa993b | 247 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
248 | { |
249 | va_list args; | |
c906108c | 250 | va_start (args, format); |
c906108c SS |
251 | |
252 | vfprintf_filtered (gdb_stdout, format, args); | |
253 | ||
254 | va_end (args); | |
255 | } | |
256 | ||
257 | /* GDB version of error vprintf_filtered. */ | |
258 | ||
c906108c | 259 | static void |
c5aa993b | 260 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
261 | { |
262 | vfprintf_filtered (gdb_stdout, format, ap); | |
263 | } | |
264 | ||
265 | /* GDB version of error evprintf_filtered. */ | |
266 | ||
c906108c | 267 | static void |
c5aa993b | 268 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
269 | { |
270 | vfprintf_filtered (gdb_stderr, format, ap); | |
271 | } | |
272 | ||
273 | /* GDB version of error callback. */ | |
274 | ||
c906108c | 275 | static void |
c5aa993b | 276 | gdb_os_error (host_callback * p, const char *format,...) |
c906108c SS |
277 | { |
278 | if (error_hook) | |
279 | (*error_hook) (); | |
c5aa993b | 280 | else |
c906108c SS |
281 | { |
282 | va_list args; | |
c906108c | 283 | va_start (args, format); |
c906108c SS |
284 | |
285 | error_begin (); | |
286 | vfprintf_filtered (gdb_stderr, format, args); | |
287 | fprintf_filtered (gdb_stderr, "\n"); | |
288 | va_end (args); | |
289 | return_to_top_level (RETURN_ERROR); | |
290 | } | |
291 | } | |
292 | ||
293 | static void | |
294 | gdbsim_fetch_register (regno) | |
295 | int regno; | |
296 | { | |
297 | static int warn_user = 1; | |
c5aa993b | 298 | if (regno == -1) |
c906108c SS |
299 | { |
300 | for (regno = 0; regno < NUM_REGS; regno++) | |
301 | gdbsim_fetch_register (regno); | |
302 | } | |
303 | else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') | |
304 | { | |
305 | char buf[MAX_REGISTER_RAW_SIZE]; | |
306 | int nr_bytes = sim_fetch_register (gdbsim_desc, regno, buf, REGISTER_RAW_SIZE (regno)); | |
307 | if (nr_bytes == 0) | |
308 | /* register not applicable, supply zero's */ | |
309 | memset (buf, 0, MAX_REGISTER_RAW_SIZE); | |
310 | else if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno) | |
311 | && warn_user) | |
312 | { | |
313 | printf_unfiltered ("Size of register %s (%d) incorrect (%d instead of %d))", | |
314 | REGISTER_NAME (regno), regno, | |
315 | nr_bytes, REGISTER_RAW_SIZE (regno)); | |
316 | warn_user = 0; | |
317 | } | |
318 | supply_register (regno, buf); | |
319 | if (sr_get_debug ()) | |
320 | { | |
321 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
322 | /* FIXME: We could print something more intelligible. */ | |
323 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); | |
324 | } | |
325 | } | |
326 | } | |
327 | ||
328 | ||
329 | static void | |
330 | gdbsim_store_register (regno) | |
331 | int regno; | |
332 | { | |
c5aa993b | 333 | if (regno == -1) |
c906108c SS |
334 | { |
335 | for (regno = 0; regno < NUM_REGS; regno++) | |
336 | gdbsim_store_register (regno); | |
337 | } | |
338 | else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') | |
339 | { | |
340 | char tmp[MAX_REGISTER_RAW_SIZE]; | |
341 | int nr_bytes; | |
342 | read_register_gen (regno, tmp); | |
343 | nr_bytes = sim_store_register (gdbsim_desc, regno, tmp, REGISTER_RAW_SIZE (regno)); | |
344 | if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno)) | |
96baa820 | 345 | internal_error ("Register size different to expected"); |
c906108c SS |
346 | if (sr_get_debug ()) |
347 | { | |
348 | printf_filtered ("gdbsim_store_register: %d", regno); | |
349 | /* FIXME: We could print something more intelligible. */ | |
350 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
355 | /* Kill the running program. This may involve closing any open files | |
356 | and releasing other resources acquired by the simulated program. */ | |
357 | ||
358 | static void | |
359 | gdbsim_kill () | |
360 | { | |
361 | if (sr_get_debug ()) | |
362 | printf_filtered ("gdbsim_kill\n"); | |
363 | ||
364 | /* There is no need to `kill' running simulator - the simulator is | |
365 | not running */ | |
366 | inferior_pid = 0; | |
367 | } | |
368 | ||
369 | /* Load an executable file into the target process. This is expected to | |
370 | not only bring new code into the target process, but also to update | |
371 | GDB's symbol tables to match. */ | |
372 | ||
373 | static void | |
374 | gdbsim_load (prog, fromtty) | |
375 | char *prog; | |
376 | int fromtty; | |
377 | { | |
378 | if (sr_get_debug ()) | |
379 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
380 | ||
381 | inferior_pid = 0; | |
382 | ||
383 | /* FIXME: We will print two messages on error. | |
384 | Need error to either not print anything if passed NULL or need | |
385 | another routine that doesn't take any arguments. */ | |
386 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
387 | error ("unable to load program"); | |
388 | ||
389 | /* FIXME: If a load command should reset the targets registers then | |
390 | a call to sim_create_inferior() should go here. */ | |
391 | ||
392 | program_loaded = 1; | |
393 | } | |
394 | ||
395 | ||
396 | /* Start an inferior process and set inferior_pid to its pid. | |
397 | EXEC_FILE is the file to run. | |
398 | ARGS is a string containing the arguments to the program. | |
399 | ENV is the environment vector to pass. Errors reported with error(). | |
400 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
401 | /* This is called not only when we first attach, but also when the | |
402 | user types "run" after having attached. */ | |
403 | ||
404 | static void | |
405 | gdbsim_create_inferior (exec_file, args, env) | |
406 | char *exec_file; | |
407 | char *args; | |
408 | char **env; | |
409 | { | |
410 | int len; | |
c5aa993b | 411 | char *arg_buf, **argv; |
c906108c SS |
412 | |
413 | if (exec_file == 0 || exec_bfd == 0) | |
414 | warning ("No executable file specified."); | |
c5aa993b | 415 | if (!program_loaded) |
c906108c SS |
416 | warning ("No program loaded."); |
417 | ||
418 | if (sr_get_debug ()) | |
419 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
c5aa993b | 420 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
421 | args); |
422 | ||
c5aa993b | 423 | gdbsim_kill (); |
c906108c SS |
424 | remove_breakpoints (); |
425 | init_wait_for_inferior (); | |
426 | ||
427 | if (exec_file != NULL) | |
428 | { | |
c5aa993b | 429 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
430 | arg_buf = (char *) alloca (len); |
431 | arg_buf[0] = '\0'; | |
432 | strcat (arg_buf, exec_file); | |
433 | strcat (arg_buf, " "); | |
434 | strcat (arg_buf, args); | |
435 | argv = buildargv (arg_buf); | |
7a292a7a | 436 | make_cleanup_freeargv (argv); |
c906108c SS |
437 | } |
438 | else | |
439 | argv = NULL; | |
440 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
441 | ||
442 | inferior_pid = 42; | |
c5aa993b | 443 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
444 | |
445 | clear_proceed_status (); | |
446 | ||
447 | /* NB: Entry point already set by sim_create_inferior. */ | |
c5aa993b | 448 | proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_DEFAULT, 0); |
c906108c SS |
449 | } |
450 | ||
451 | /* The open routine takes the rest of the parameters from the command, | |
452 | and (if successful) pushes a new target onto the stack. | |
453 | Targets should supply this routine, if only to provide an error message. */ | |
454 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
455 | ||
456 | static void | |
457 | gdbsim_open (args, from_tty) | |
458 | char *args; | |
459 | int from_tty; | |
460 | { | |
461 | int len; | |
462 | char *arg_buf; | |
463 | char **argv; | |
464 | ||
465 | if (sr_get_debug ()) | |
466 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
467 | ||
468 | /* Remove current simulator if one exists. Only do this if the simulator | |
469 | has been opened because sim_close requires it. | |
470 | This is important because the call to push_target below will cause | |
471 | sim_close to be called if the simulator is already open, but push_target | |
472 | is called after sim_open! We can't move the call to push_target before | |
473 | the call to sim_open because sim_open may invoke `error'. */ | |
474 | if (gdbsim_desc != NULL) | |
475 | unpush_target (&gdbsim_ops); | |
476 | ||
c5aa993b | 477 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
478 | + strlen (" -E little") |
479 | + strlen (" --architecture=xxxxxxxxxx") | |
480 | + (args ? strlen (args) : 0) | |
c5aa993b | 481 | + 50) /* slack */ ; |
c906108c | 482 | arg_buf = (char *) alloca (len); |
c5aa993b | 483 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
c906108c SS |
484 | /* Specify the byte order for the target when it is both selectable |
485 | and explicitly specified by the user (not auto detected). */ | |
486 | if (TARGET_BYTE_ORDER_SELECTABLE_P | |
487 | && !TARGET_BYTE_ORDER_AUTO) | |
488 | { | |
489 | switch (TARGET_BYTE_ORDER) | |
490 | { | |
491 | case BIG_ENDIAN: | |
492 | strcat (arg_buf, " -E big"); | |
493 | break; | |
494 | case LITTLE_ENDIAN: | |
495 | strcat (arg_buf, " -E little"); | |
496 | break; | |
497 | default: | |
96baa820 | 498 | internal_error ("Value of TARGET_BYTE_ORDER unknown"); |
c906108c SS |
499 | } |
500 | } | |
501 | /* Specify the architecture of the target when it has been | |
502 | explicitly specified */ | |
503 | if (!TARGET_ARCHITECTURE_AUTO) | |
504 | { | |
505 | strcat (arg_buf, " --architecture="); | |
506 | strcat (arg_buf, TARGET_ARCHITECTURE->printable_name); | |
507 | } | |
508 | /* finally, any explicit args */ | |
509 | if (args) | |
510 | { | |
c5aa993b | 511 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
512 | strcat (arg_buf, args); |
513 | } | |
514 | argv = buildargv (arg_buf); | |
515 | if (argv == NULL) | |
516 | error ("Insufficient memory available to allocate simulator arg list."); | |
7a292a7a | 517 | make_cleanup_freeargv (argv); |
c906108c SS |
518 | |
519 | init_callbacks (); | |
520 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
521 | ||
522 | if (gdbsim_desc == 0) | |
523 | error ("unable to create simulator instance"); | |
524 | ||
525 | push_target (&gdbsim_ops); | |
526 | target_fetch_registers (-1); | |
527 | printf_filtered ("Connected to the simulator.\n"); | |
528 | } | |
529 | ||
530 | /* Does whatever cleanup is required for a target that we are no longer | |
531 | going to be calling. Argument says whether we are quitting gdb and | |
532 | should not get hung in case of errors, or whether we want a clean | |
533 | termination even if it takes a while. This routine is automatically | |
534 | always called just before a routine is popped off the target stack. | |
535 | Closing file descriptors and freeing memory are typical things it should | |
536 | do. */ | |
537 | /* Close out all files and local state before this target loses control. */ | |
538 | ||
539 | static void | |
540 | gdbsim_close (quitting) | |
541 | int quitting; | |
542 | { | |
543 | if (sr_get_debug ()) | |
544 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
545 | ||
546 | program_loaded = 0; | |
547 | ||
548 | if (gdbsim_desc != NULL) | |
549 | { | |
550 | sim_close (gdbsim_desc, quitting); | |
551 | gdbsim_desc = NULL; | |
552 | } | |
553 | ||
554 | end_callbacks (); | |
555 | } | |
556 | ||
557 | /* Takes a program previously attached to and detaches it. | |
558 | The program may resume execution (some targets do, some don't) and will | |
559 | no longer stop on signals, etc. We better not have left any breakpoints | |
560 | in the program or it'll die when it hits one. ARGS is arguments | |
561 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
562 | says whether to be verbose or not. */ | |
563 | /* Terminate the open connection to the remote debugger. | |
564 | Use this when you want to detach and do something else with your gdb. */ | |
565 | ||
566 | static void | |
c5aa993b | 567 | gdbsim_detach (args, from_tty) |
c906108c SS |
568 | char *args; |
569 | int from_tty; | |
570 | { | |
571 | if (sr_get_debug ()) | |
572 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
573 | ||
574 | pop_target (); /* calls gdbsim_close to do the real work */ | |
575 | if (from_tty) | |
576 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
577 | } | |
c5aa993b | 578 | |
c906108c SS |
579 | /* Resume execution of the target process. STEP says whether to single-step |
580 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
581 | to the target, or zero for no signal. */ | |
582 | ||
583 | static enum target_signal resume_siggnal; | |
584 | static int resume_step; | |
585 | ||
586 | static void | |
587 | gdbsim_resume (pid, step, siggnal) | |
588 | int pid, step; | |
589 | enum target_signal siggnal; | |
590 | { | |
591 | if (inferior_pid != 42) | |
592 | error ("The program is not being run."); | |
593 | ||
594 | if (sr_get_debug ()) | |
595 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
596 | ||
597 | resume_siggnal = siggnal; | |
598 | resume_step = step; | |
599 | } | |
600 | ||
601 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 602 | |
c906108c SS |
603 | The simulator shall ensure that the stop request is eventually |
604 | delivered to the simulator. If the call is made while the | |
605 | simulator is not running then the stop request is processed when | |
606 | the simulator is next resumed. | |
607 | ||
608 | For simulators that do not support this operation, just abort */ | |
609 | ||
610 | static void | |
611 | gdbsim_stop () | |
612 | { | |
c5aa993b | 613 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
614 | { |
615 | quit (); | |
616 | } | |
617 | } | |
618 | ||
619 | /* GDB version of os_poll_quit callback. | |
620 | Taken from gdb/util.c - should be in a library */ | |
621 | ||
622 | static int | |
623 | gdb_os_poll_quit (p) | |
624 | host_callback *p; | |
625 | { | |
7a292a7a SS |
626 | if (ui_loop_hook != NULL) |
627 | ui_loop_hook (0); | |
628 | ||
c906108c | 629 | notice_quit (); |
c5aa993b | 630 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 631 | { |
c5aa993b | 632 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
633 | return 1; |
634 | } | |
635 | else if (immediate_quit) | |
636 | { | |
637 | return 1; | |
638 | } | |
639 | return 0; | |
640 | } | |
641 | ||
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. */ | |
645 | ||
646 | static void | |
647 | gdbsim_cntrl_c (signo) | |
648 | int signo; | |
649 | { | |
650 | gdbsim_stop (); | |
651 | } | |
652 | ||
653 | static int | |
654 | gdbsim_wait (pid, status) | |
655 | int pid; | |
656 | struct target_waitstatus *status; | |
657 | { | |
658 | static RETSIGTYPE (*prev_sigint) (); | |
659 | int sigrc = 0; | |
660 | enum sim_stop reason = sim_running; | |
661 | ||
662 | if (sr_get_debug ()) | |
663 | printf_filtered ("gdbsim_wait\n"); | |
664 | ||
665 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
666 | { | |
667 | struct sigaction sa, osa; | |
668 | sa.sa_handler = gdbsim_cntrl_c; | |
669 | sigemptyset (&sa.sa_mask); | |
670 | sa.sa_flags = 0; | |
671 | sigaction (SIGINT, &sa, &osa); | |
672 | prev_sigint = osa.sa_handler; | |
673 | } | |
674 | #else | |
675 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
676 | #endif | |
677 | sim_resume (gdbsim_desc, resume_step, | |
678 | target_signal_to_host (resume_siggnal)); | |
679 | signal (SIGINT, prev_sigint); | |
680 | resume_step = 0; | |
681 | ||
682 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
683 | ||
684 | switch (reason) | |
685 | { | |
686 | case sim_exited: | |
687 | status->kind = TARGET_WAITKIND_EXITED; | |
688 | status->value.integer = sigrc; | |
689 | break; | |
690 | case sim_stopped: | |
691 | switch (sigrc) | |
692 | { | |
693 | case SIGABRT: | |
694 | quit (); | |
695 | break; | |
696 | case SIGINT: | |
697 | case SIGTRAP: | |
698 | default: | |
699 | status->kind = TARGET_WAITKIND_STOPPED; | |
700 | /* The signal in sigrc is a host signal. That probably | |
701 | should be fixed. */ | |
702 | status->value.sig = target_signal_from_host (sigrc); | |
703 | break; | |
704 | } | |
705 | break; | |
706 | case sim_signalled: | |
707 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
708 | /* The signal in sigrc is a host signal. That probably | |
c5aa993b | 709 | should be fixed. */ |
c906108c SS |
710 | status->value.sig = target_signal_from_host (sigrc); |
711 | break; | |
712 | case sim_running: | |
713 | case sim_polling: | |
714 | /* FIXME: Is this correct? */ | |
715 | break; | |
716 | } | |
717 | ||
718 | return inferior_pid; | |
719 | } | |
720 | ||
721 | /* Get ready to modify the registers array. On machines which store | |
722 | individual registers, this doesn't need to do anything. On machines | |
723 | which store all the registers in one fell swoop, this makes sure | |
724 | that registers contains all the registers from the program being | |
725 | debugged. */ | |
726 | ||
727 | static void | |
728 | gdbsim_prepare_to_store () | |
729 | { | |
730 | /* Do nothing, since we can store individual regs */ | |
731 | } | |
732 | ||
733 | static int | |
734 | gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
735 | CORE_ADDR memaddr; | |
736 | char *myaddr; | |
737 | int len; | |
738 | int write; | |
c5aa993b | 739 | struct target_ops *target; /* ignored */ |
c906108c | 740 | { |
c5aa993b | 741 | if (!program_loaded) |
c906108c SS |
742 | error ("No program loaded."); |
743 | ||
744 | if (sr_get_debug ()) | |
745 | { | |
746 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n", | |
747 | myaddr, memaddr, len, write); | |
748 | if (sr_get_debug () && write) | |
c5aa993b | 749 | dump_mem (myaddr, len); |
c906108c SS |
750 | } |
751 | ||
752 | if (write) | |
753 | { | |
754 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
755 | } | |
c5aa993b | 756 | else |
c906108c SS |
757 | { |
758 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
759 | if (sr_get_debug () && len > 0) | |
c5aa993b JM |
760 | dump_mem (myaddr, len); |
761 | } | |
c906108c SS |
762 | return len; |
763 | } | |
764 | ||
765 | static void | |
766 | gdbsim_files_info (target) | |
767 | struct target_ops *target; | |
768 | { | |
769 | char *file = "nothing"; | |
770 | ||
771 | if (exec_bfd) | |
772 | file = bfd_get_filename (exec_bfd); | |
773 | ||
774 | if (sr_get_debug ()) | |
775 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
776 | ||
777 | if (exec_bfd) | |
778 | { | |
779 | printf_filtered ("\tAttached to %s running program %s\n", | |
780 | target_shortname, file); | |
781 | sim_info (gdbsim_desc, 0); | |
782 | } | |
783 | } | |
784 | ||
785 | /* Clear the simulator's notion of what the break points are. */ | |
786 | ||
787 | static void | |
c5aa993b JM |
788 | gdbsim_mourn_inferior () |
789 | { | |
c906108c SS |
790 | if (sr_get_debug ()) |
791 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
792 | ||
793 | remove_breakpoints (); | |
794 | generic_mourn_inferior (); | |
795 | } | |
796 | ||
797 | static int | |
798 | gdbsim_insert_breakpoint (addr, contents_cache) | |
799 | CORE_ADDR addr; | |
800 | char *contents_cache; | |
801 | { | |
802 | #ifdef SIM_HAS_BREAKPOINTS | |
803 | SIM_RC retcode; | |
804 | ||
805 | retcode = sim_set_breakpoint (gdbsim_desc, addr); | |
806 | ||
807 | switch (retcode) | |
808 | { | |
809 | case SIM_RC_OK: | |
810 | return 0; | |
811 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
812 | return ENOMEM; | |
813 | default: | |
814 | return EIO; | |
815 | } | |
816 | #else | |
817 | return memory_insert_breakpoint (addr, contents_cache); | |
818 | #endif | |
819 | } | |
820 | ||
821 | static int | |
822 | gdbsim_remove_breakpoint (addr, contents_cache) | |
823 | CORE_ADDR addr; | |
824 | char *contents_cache; | |
825 | { | |
826 | #ifdef SIM_HAS_BREAKPOINTS | |
827 | SIM_RC retcode; | |
828 | ||
829 | retcode = sim_clear_breakpoint (gdbsim_desc, addr); | |
830 | ||
831 | switch (retcode) | |
832 | { | |
833 | case SIM_RC_OK: | |
834 | case SIM_RC_UNKNOWN_BREAKPOINT: | |
835 | return 0; | |
836 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
837 | return ENOMEM; | |
838 | default: | |
839 | return EIO; | |
840 | } | |
841 | #else | |
842 | return memory_remove_breakpoint (addr, contents_cache); | |
843 | #endif | |
844 | } | |
845 | ||
846 | /* Pass the command argument through to the simulator verbatim. The | |
847 | simulator must do any command interpretation work. */ | |
848 | ||
849 | void | |
850 | simulator_command (args, from_tty) | |
851 | char *args; | |
852 | int from_tty; | |
853 | { | |
854 | if (gdbsim_desc == NULL) | |
855 | { | |
856 | ||
857 | /* PREVIOUSLY: The user may give a command before the simulator | |
858 | is opened. [...] (??? assuming of course one wishes to | |
859 | continue to allow commands to be sent to unopened simulators, | |
860 | which isn't entirely unreasonable). */ | |
861 | ||
862 | /* The simulator is a builtin abstraction of a remote target. | |
863 | Consistent with that model, access to the simulator, via sim | |
864 | commands, is restricted to the period when the channel to the | |
865 | simulator is open. */ | |
866 | ||
867 | error ("Not connected to the simulator target"); | |
868 | } | |
869 | ||
870 | sim_do_command (gdbsim_desc, args); | |
871 | ||
872 | /* Invalidate the register cache, in case the simulator command does | |
873 | something funny. */ | |
c5aa993b | 874 | registers_changed (); |
c906108c SS |
875 | } |
876 | ||
877 | /* Define the target subroutine names */ | |
878 | ||
c5aa993b JM |
879 | struct target_ops gdbsim_ops; |
880 | ||
881 | static void | |
882 | init_gdbsim_ops (void) | |
883 | { | |
884 | gdbsim_ops.to_shortname = "sim"; | |
885 | gdbsim_ops.to_longname = "simulator"; | |
886 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
887 | gdbsim_ops.to_open = gdbsim_open; | |
888 | gdbsim_ops.to_close = gdbsim_close; | |
889 | gdbsim_ops.to_attach = NULL; | |
890 | gdbsim_ops.to_post_attach = NULL; | |
891 | gdbsim_ops.to_require_attach = NULL; | |
892 | gdbsim_ops.to_detach = gdbsim_detach; | |
893 | gdbsim_ops.to_require_detach = NULL; | |
894 | gdbsim_ops.to_resume = gdbsim_resume; | |
895 | gdbsim_ops.to_wait = gdbsim_wait; | |
896 | gdbsim_ops.to_post_wait = NULL; | |
897 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; | |
898 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
899 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
900 | gdbsim_ops.to_xfer_memory = gdbsim_xfer_inferior_memory; | |
901 | gdbsim_ops.to_files_info = gdbsim_files_info; | |
902 | gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint; | |
903 | gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint; | |
904 | gdbsim_ops.to_terminal_init = NULL; | |
905 | gdbsim_ops.to_terminal_inferior = NULL; | |
906 | gdbsim_ops.to_terminal_ours_for_output = NULL; | |
907 | gdbsim_ops.to_terminal_ours = NULL; | |
908 | gdbsim_ops.to_terminal_info = NULL; | |
909 | gdbsim_ops.to_kill = gdbsim_kill; | |
910 | gdbsim_ops.to_load = gdbsim_load; | |
911 | gdbsim_ops.to_lookup_symbol = NULL; | |
912 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; | |
c906108c SS |
913 | gdbsim_ops.to_post_startup_inferior = NULL; |
914 | gdbsim_ops.to_acknowledge_created_inferior = NULL; | |
915 | gdbsim_ops.to_clone_and_follow_inferior = NULL; | |
916 | gdbsim_ops.to_post_follow_inferior_by_clone = NULL; | |
917 | gdbsim_ops.to_insert_fork_catchpoint = NULL; | |
918 | gdbsim_ops.to_remove_fork_catchpoint = NULL; | |
919 | gdbsim_ops.to_insert_vfork_catchpoint = NULL; | |
920 | gdbsim_ops.to_remove_vfork_catchpoint = NULL; | |
921 | gdbsim_ops.to_has_forked = NULL; | |
922 | gdbsim_ops.to_has_vforked = NULL; | |
923 | gdbsim_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
924 | gdbsim_ops.to_post_follow_vfork = NULL; | |
925 | gdbsim_ops.to_insert_exec_catchpoint = NULL; | |
926 | gdbsim_ops.to_remove_exec_catchpoint = NULL; | |
927 | gdbsim_ops.to_has_execd = NULL; | |
928 | gdbsim_ops.to_reported_exec_events_per_exec_call = NULL; | |
929 | gdbsim_ops.to_has_exited = NULL; | |
c5aa993b JM |
930 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
931 | gdbsim_ops.to_can_run = 0; | |
932 | gdbsim_ops.to_notice_signals = 0; | |
933 | gdbsim_ops.to_thread_alive = 0; | |
934 | gdbsim_ops.to_stop = gdbsim_stop; | |
935 | gdbsim_ops.to_pid_to_exec_file = NULL; | |
936 | gdbsim_ops.to_core_file_to_sym_file = NULL; | |
937 | gdbsim_ops.to_stratum = process_stratum; | |
938 | gdbsim_ops.DONT_USE = NULL; | |
939 | gdbsim_ops.to_has_all_memory = 1; | |
940 | gdbsim_ops.to_has_memory = 1; | |
941 | gdbsim_ops.to_has_stack = 1; | |
942 | gdbsim_ops.to_has_registers = 1; | |
943 | gdbsim_ops.to_has_execution = 1; | |
944 | gdbsim_ops.to_sections = NULL; | |
945 | gdbsim_ops.to_sections_end = NULL; | |
946 | gdbsim_ops.to_magic = OPS_MAGIC; | |
c906108c SS |
947 | |
948 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
949 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
950 | #endif | |
951 | } | |
952 | ||
953 | void | |
954 | _initialize_remote_sim () | |
955 | { | |
c5aa993b | 956 | init_gdbsim_ops (); |
c906108c SS |
957 | add_target (&gdbsim_ops); |
958 | ||
959 | add_com ("sim <command>", class_obscure, simulator_command, | |
c5aa993b | 960 | "Send a command to the simulator."); |
c906108c | 961 | } |