Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 AC |
2 | |
3 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, | |
4 | 2002 Free Software Foundation, Inc. | |
5 | ||
c906108c SS |
6 | Contributed by Cygnus Support. |
7 | Steve Chamberlain (sac@cygnus.com). | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
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. | |
c906108c | 15 | |
c5aa993b JM |
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. | |
c906108c | 20 | |
c5aa993b JM |
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., 59 Temple Place - Suite 330, | |
24 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
25 | |
26 | #include "defs.h" | |
27 | #include "inferior.h" | |
c906108c SS |
28 | #include "value.h" |
29 | #include "gdb_string.h" | |
30 | #include <ctype.h> | |
31 | #include <fcntl.h> | |
32 | #include <signal.h> | |
33 | #include <setjmp.h> | |
34 | #include <errno.h> | |
35 | #include "terminal.h" | |
36 | #include "target.h" | |
37 | #include "gdbcore.h" | |
38 | #include "callback.h" | |
39 | #include "remote-sim.h" | |
40 | #include "remote-utils.h" | |
41 | #include "command.h" | |
4e052eda | 42 | #include "regcache.h" |
c906108c SS |
43 | |
44 | /* Prototypes */ | |
45 | ||
a14ed312 | 46 | extern void _initialize_remote_sim (void); |
392a587b | 47 | |
507f3c78 | 48 | extern int (*ui_loop_hook) (int signo); |
7a292a7a | 49 | |
a14ed312 | 50 | static void dump_mem (char *buf, int len); |
c906108c | 51 | |
a14ed312 | 52 | static void init_callbacks (void); |
c906108c | 53 | |
a14ed312 | 54 | static void end_callbacks (void); |
c906108c | 55 | |
a14ed312 | 56 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 57 | |
a14ed312 | 58 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 59 | |
a14ed312 | 60 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 61 | |
a14ed312 | 62 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 63 | |
a14ed312 | 64 | static int gdb_os_poll_quit (host_callback *); |
c906108c SS |
65 | |
66 | /* printf_filtered is depreciated */ | |
a14ed312 | 67 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 68 | |
a14ed312 | 69 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 70 | |
a14ed312 | 71 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 72 | |
a14ed312 | 73 | static void gdb_os_error (host_callback *, const char *, ...); |
c906108c | 74 | |
a14ed312 | 75 | static void gdbsim_fetch_register (int regno); |
c906108c | 76 | |
a14ed312 | 77 | static void gdbsim_store_register (int regno); |
c906108c | 78 | |
a14ed312 | 79 | static void gdbsim_kill (void); |
c906108c | 80 | |
a14ed312 | 81 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 82 | |
a14ed312 | 83 | static void gdbsim_create_inferior (char *exec_file, char *args, char **env); |
c906108c | 84 | |
a14ed312 | 85 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 86 | |
a14ed312 | 87 | static void gdbsim_close (int quitting); |
c906108c | 88 | |
a14ed312 | 89 | static void gdbsim_detach (char *args, int from_tty); |
c906108c | 90 | |
39f77062 | 91 | static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal); |
c906108c | 92 | |
39f77062 | 93 | static ptid_t gdbsim_wait (ptid_t ptid, struct target_waitstatus *status); |
c906108c | 94 | |
a14ed312 | 95 | static void gdbsim_prepare_to_store (void); |
c906108c | 96 | |
29e57380 C |
97 | static int gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, |
98 | int len, int write, | |
99 | struct mem_attrib *attrib, | |
100 | struct target_ops *target); | |
c906108c | 101 | |
a14ed312 | 102 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 103 | |
a14ed312 | 104 | static void gdbsim_mourn_inferior (void); |
c906108c | 105 | |
a14ed312 | 106 | static void gdbsim_stop (void); |
c906108c | 107 | |
a14ed312 | 108 | void simulator_command (char *args, int from_tty); |
c906108c SS |
109 | |
110 | /* Naming convention: | |
111 | ||
112 | sim_* are the interface to the simulator (see remote-sim.h). | |
113 | gdbsim_* are stuff which is internal to gdb. */ | |
114 | ||
115 | /* Forward data declarations */ | |
116 | extern struct target_ops gdbsim_ops; | |
117 | ||
118 | static int program_loaded = 0; | |
119 | ||
120 | /* We must keep track of whether the simulator has been opened or not because | |
121 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
122 | this. We also need to record the result of sim_open so we can pass it | |
123 | back to the other sim_foo routines. */ | |
124 | static SIM_DESC gdbsim_desc = 0; | |
125 | ||
126 | static void | |
fba45db2 | 127 | dump_mem (char *buf, int len) |
c906108c SS |
128 | { |
129 | if (len <= 8) | |
130 | { | |
131 | if (len == 8 || len == 4) | |
132 | { | |
133 | long l[2]; | |
134 | memcpy (l, buf, len); | |
d4f3574e | 135 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
136 | if (len == 8) |
137 | printf_filtered (" 0x%lx", l[1]); | |
138 | printf_filtered ("\n"); | |
c906108c SS |
139 | } |
140 | else | |
141 | { | |
142 | int i; | |
143 | printf_filtered ("\t"); | |
144 | for (i = 0; i < len; i++) | |
145 | printf_filtered ("0x%x ", buf[i]); | |
146 | printf_filtered ("\n"); | |
147 | } | |
148 | } | |
149 | } | |
150 | ||
151 | static host_callback gdb_callback; | |
152 | static int callbacks_initialized = 0; | |
153 | ||
154 | /* Initialize gdb_callback. */ | |
155 | ||
156 | static void | |
fba45db2 | 157 | init_callbacks (void) |
c906108c | 158 | { |
c5aa993b | 159 | if (!callbacks_initialized) |
c906108c SS |
160 | { |
161 | gdb_callback = default_callback; | |
162 | gdb_callback.init (&gdb_callback); | |
163 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
164 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
165 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
166 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
167 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
168 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
169 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
170 | gdb_callback.error = gdb_os_error; | |
171 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
172 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
173 | callbacks_initialized = 1; | |
174 | } | |
175 | } | |
176 | ||
177 | /* Release callbacks (free resources used by them). */ | |
178 | ||
179 | static void | |
fba45db2 | 180 | end_callbacks (void) |
c906108c SS |
181 | { |
182 | if (callbacks_initialized) | |
183 | { | |
184 | gdb_callback.shutdown (&gdb_callback); | |
185 | callbacks_initialized = 0; | |
186 | } | |
187 | } | |
188 | ||
189 | /* GDB version of os_write_stdout callback. */ | |
190 | ||
c5aa993b | 191 | static int |
fba45db2 | 192 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
193 | { |
194 | int i; | |
195 | char b[2]; | |
196 | ||
d9fcf2fb | 197 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
198 | return len; |
199 | } | |
200 | ||
201 | /* GDB version of os_flush_stdout callback. */ | |
202 | ||
203 | static void | |
fba45db2 | 204 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 205 | { |
4ce44c66 | 206 | gdb_flush (gdb_stdtarg); |
c906108c SS |
207 | } |
208 | ||
209 | /* GDB version of os_write_stderr callback. */ | |
210 | ||
c5aa993b | 211 | static int |
fba45db2 | 212 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
213 | { |
214 | int i; | |
215 | char b[2]; | |
216 | ||
c5aa993b | 217 | for (i = 0; i < len; i++) |
c906108c SS |
218 | { |
219 | b[0] = buf[i]; | |
220 | b[1] = 0; | |
43ff13b4 | 221 | fputs_unfiltered (b, gdb_stdtarg); |
c906108c SS |
222 | } |
223 | return len; | |
224 | } | |
225 | ||
226 | /* GDB version of os_flush_stderr callback. */ | |
227 | ||
228 | static void | |
fba45db2 | 229 | gdb_os_flush_stderr (host_callback *p) |
c906108c SS |
230 | { |
231 | gdb_flush (gdb_stderr); | |
232 | } | |
233 | ||
234 | /* GDB version of printf_filtered callback. */ | |
235 | ||
c906108c | 236 | static void |
c5aa993b | 237 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
238 | { |
239 | va_list args; | |
c906108c | 240 | va_start (args, format); |
c906108c SS |
241 | |
242 | vfprintf_filtered (gdb_stdout, format, args); | |
243 | ||
244 | va_end (args); | |
245 | } | |
246 | ||
247 | /* GDB version of error vprintf_filtered. */ | |
248 | ||
c906108c | 249 | static void |
c5aa993b | 250 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
251 | { |
252 | vfprintf_filtered (gdb_stdout, format, ap); | |
253 | } | |
254 | ||
255 | /* GDB version of error evprintf_filtered. */ | |
256 | ||
c906108c | 257 | static void |
c5aa993b | 258 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
259 | { |
260 | vfprintf_filtered (gdb_stderr, format, ap); | |
261 | } | |
262 | ||
263 | /* GDB version of error callback. */ | |
264 | ||
c906108c | 265 | static void |
c5aa993b | 266 | gdb_os_error (host_callback * p, const char *format,...) |
c906108c SS |
267 | { |
268 | if (error_hook) | |
269 | (*error_hook) (); | |
c5aa993b | 270 | else |
c906108c SS |
271 | { |
272 | va_list args; | |
c906108c | 273 | va_start (args, format); |
4ce44c66 | 274 | verror (format, args); |
c906108c | 275 | va_end (args); |
c906108c SS |
276 | } |
277 | } | |
278 | ||
279 | static void | |
fba45db2 | 280 | gdbsim_fetch_register (int regno) |
c906108c SS |
281 | { |
282 | static int warn_user = 1; | |
c5aa993b | 283 | if (regno == -1) |
c906108c SS |
284 | { |
285 | for (regno = 0; regno < NUM_REGS; regno++) | |
286 | gdbsim_fetch_register (regno); | |
287 | } | |
d4f3574e SS |
288 | else if (REGISTER_NAME (regno) != NULL |
289 | && *REGISTER_NAME (regno) != '\0') | |
c906108c SS |
290 | { |
291 | char buf[MAX_REGISTER_RAW_SIZE]; | |
d4f3574e SS |
292 | int nr_bytes; |
293 | if (REGISTER_SIM_REGNO (regno) >= 0) | |
294 | nr_bytes = sim_fetch_register (gdbsim_desc, | |
295 | REGISTER_SIM_REGNO (regno), | |
296 | buf, REGISTER_RAW_SIZE (regno)); | |
297 | else | |
298 | nr_bytes = 0; | |
c906108c SS |
299 | if (nr_bytes == 0) |
300 | /* register not applicable, supply zero's */ | |
301 | memset (buf, 0, MAX_REGISTER_RAW_SIZE); | |
302 | else if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno) | |
303 | && warn_user) | |
304 | { | |
d4f3574e SS |
305 | fprintf_unfiltered (gdb_stderr, |
306 | "Size of register %s (%d/%d) incorrect (%d instead of %d))", | |
307 | REGISTER_NAME (regno), | |
308 | regno, REGISTER_SIM_REGNO (regno), | |
309 | nr_bytes, REGISTER_RAW_SIZE (regno)); | |
c906108c SS |
310 | warn_user = 0; |
311 | } | |
312 | supply_register (regno, buf); | |
313 | if (sr_get_debug ()) | |
314 | { | |
315 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
316 | /* FIXME: We could print something more intelligible. */ | |
317 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); | |
318 | } | |
319 | } | |
320 | } | |
321 | ||
322 | ||
323 | static void | |
fba45db2 | 324 | gdbsim_store_register (int regno) |
c906108c | 325 | { |
c5aa993b | 326 | if (regno == -1) |
c906108c SS |
327 | { |
328 | for (regno = 0; regno < NUM_REGS; regno++) | |
329 | gdbsim_store_register (regno); | |
330 | } | |
d4f3574e SS |
331 | else if (REGISTER_NAME (regno) != NULL |
332 | && *REGISTER_NAME (regno) != '\0' | |
333 | && REGISTER_SIM_REGNO (regno) >= 0) | |
c906108c SS |
334 | { |
335 | char tmp[MAX_REGISTER_RAW_SIZE]; | |
336 | int nr_bytes; | |
337 | read_register_gen (regno, tmp); | |
d4f3574e SS |
338 | nr_bytes = sim_store_register (gdbsim_desc, |
339 | REGISTER_SIM_REGNO (regno), | |
340 | tmp, REGISTER_RAW_SIZE (regno)); | |
c906108c | 341 | if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno)) |
8e65ff28 AC |
342 | internal_error (__FILE__, __LINE__, |
343 | "Register size different to expected"); | |
c906108c SS |
344 | if (sr_get_debug ()) |
345 | { | |
346 | printf_filtered ("gdbsim_store_register: %d", regno); | |
347 | /* FIXME: We could print something more intelligible. */ | |
348 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | /* Kill the running program. This may involve closing any open files | |
354 | and releasing other resources acquired by the simulated program. */ | |
355 | ||
356 | static void | |
fba45db2 | 357 | gdbsim_kill (void) |
c906108c SS |
358 | { |
359 | if (sr_get_debug ()) | |
360 | printf_filtered ("gdbsim_kill\n"); | |
361 | ||
362 | /* There is no need to `kill' running simulator - the simulator is | |
363 | not running */ | |
39f77062 | 364 | inferior_ptid = null_ptid; |
c906108c SS |
365 | } |
366 | ||
367 | /* Load an executable file into the target process. This is expected to | |
368 | not only bring new code into the target process, but also to update | |
369 | GDB's symbol tables to match. */ | |
370 | ||
371 | static void | |
fba45db2 | 372 | gdbsim_load (char *prog, int fromtty) |
c906108c SS |
373 | { |
374 | if (sr_get_debug ()) | |
375 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
376 | ||
39f77062 | 377 | inferior_ptid = null_ptid; |
c906108c SS |
378 | |
379 | /* FIXME: We will print two messages on error. | |
380 | Need error to either not print anything if passed NULL or need | |
381 | another routine that doesn't take any arguments. */ | |
382 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
383 | error ("unable to load program"); | |
384 | ||
385 | /* FIXME: If a load command should reset the targets registers then | |
386 | a call to sim_create_inferior() should go here. */ | |
387 | ||
388 | program_loaded = 1; | |
389 | } | |
390 | ||
391 | ||
39f77062 | 392 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
393 | EXEC_FILE is the file to run. |
394 | ARGS is a string containing the arguments to the program. | |
395 | ENV is the environment vector to pass. Errors reported with error(). | |
396 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
397 | /* This is called not only when we first attach, but also when the | |
398 | user types "run" after having attached. */ | |
399 | ||
400 | static void | |
fba45db2 | 401 | gdbsim_create_inferior (char *exec_file, char *args, char **env) |
c906108c SS |
402 | { |
403 | int len; | |
c5aa993b | 404 | char *arg_buf, **argv; |
c906108c SS |
405 | |
406 | if (exec_file == 0 || exec_bfd == 0) | |
407 | warning ("No executable file specified."); | |
c5aa993b | 408 | if (!program_loaded) |
c906108c SS |
409 | warning ("No program loaded."); |
410 | ||
411 | if (sr_get_debug ()) | |
412 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
c5aa993b | 413 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
414 | args); |
415 | ||
c5aa993b | 416 | gdbsim_kill (); |
c906108c SS |
417 | remove_breakpoints (); |
418 | init_wait_for_inferior (); | |
419 | ||
420 | if (exec_file != NULL) | |
421 | { | |
c5aa993b | 422 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
423 | arg_buf = (char *) alloca (len); |
424 | arg_buf[0] = '\0'; | |
425 | strcat (arg_buf, exec_file); | |
426 | strcat (arg_buf, " "); | |
427 | strcat (arg_buf, args); | |
428 | argv = buildargv (arg_buf); | |
7a292a7a | 429 | make_cleanup_freeargv (argv); |
c906108c SS |
430 | } |
431 | else | |
432 | argv = NULL; | |
433 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
434 | ||
39f77062 | 435 | inferior_ptid = pid_to_ptid (42); |
c5aa993b | 436 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
437 | |
438 | clear_proceed_status (); | |
439 | ||
440 | /* NB: Entry point already set by sim_create_inferior. */ | |
2acceee2 | 441 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); |
c906108c SS |
442 | } |
443 | ||
444 | /* The open routine takes the rest of the parameters from the command, | |
445 | and (if successful) pushes a new target onto the stack. | |
446 | Targets should supply this routine, if only to provide an error message. */ | |
447 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
448 | ||
449 | static void | |
fba45db2 | 450 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
451 | { |
452 | int len; | |
453 | char *arg_buf; | |
454 | char **argv; | |
455 | ||
456 | if (sr_get_debug ()) | |
457 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
458 | ||
459 | /* Remove current simulator if one exists. Only do this if the simulator | |
460 | has been opened because sim_close requires it. | |
461 | This is important because the call to push_target below will cause | |
462 | sim_close to be called if the simulator is already open, but push_target | |
463 | is called after sim_open! We can't move the call to push_target before | |
464 | the call to sim_open because sim_open may invoke `error'. */ | |
465 | if (gdbsim_desc != NULL) | |
466 | unpush_target (&gdbsim_ops); | |
467 | ||
c5aa993b | 468 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
469 | + strlen (" -E little") |
470 | + strlen (" --architecture=xxxxxxxxxx") | |
471 | + (args ? strlen (args) : 0) | |
c5aa993b | 472 | + 50) /* slack */ ; |
c906108c | 473 | arg_buf = (char *) alloca (len); |
c5aa993b | 474 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
c906108c SS |
475 | /* Specify the byte order for the target when it is both selectable |
476 | and explicitly specified by the user (not auto detected). */ | |
477 | if (TARGET_BYTE_ORDER_SELECTABLE_P | |
478 | && !TARGET_BYTE_ORDER_AUTO) | |
479 | { | |
480 | switch (TARGET_BYTE_ORDER) | |
481 | { | |
d7449b42 | 482 | case BFD_ENDIAN_BIG: |
c906108c SS |
483 | strcat (arg_buf, " -E big"); |
484 | break; | |
778eb05e | 485 | case BFD_ENDIAN_LITTLE: |
c906108c SS |
486 | strcat (arg_buf, " -E little"); |
487 | break; | |
488 | default: | |
8e65ff28 AC |
489 | internal_error (__FILE__, __LINE__, |
490 | "Value of TARGET_BYTE_ORDER unknown"); | |
c906108c SS |
491 | } |
492 | } | |
493 | /* Specify the architecture of the target when it has been | |
494 | explicitly specified */ | |
495 | if (!TARGET_ARCHITECTURE_AUTO) | |
496 | { | |
497 | strcat (arg_buf, " --architecture="); | |
498 | strcat (arg_buf, TARGET_ARCHITECTURE->printable_name); | |
499 | } | |
500 | /* finally, any explicit args */ | |
501 | if (args) | |
502 | { | |
c5aa993b | 503 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
504 | strcat (arg_buf, args); |
505 | } | |
506 | argv = buildargv (arg_buf); | |
507 | if (argv == NULL) | |
508 | error ("Insufficient memory available to allocate simulator arg list."); | |
7a292a7a | 509 | make_cleanup_freeargv (argv); |
c906108c SS |
510 | |
511 | init_callbacks (); | |
512 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
513 | ||
514 | if (gdbsim_desc == 0) | |
515 | error ("unable to create simulator instance"); | |
516 | ||
517 | push_target (&gdbsim_ops); | |
518 | target_fetch_registers (-1); | |
519 | printf_filtered ("Connected to the simulator.\n"); | |
520 | } | |
521 | ||
522 | /* Does whatever cleanup is required for a target that we are no longer | |
523 | going to be calling. Argument says whether we are quitting gdb and | |
524 | should not get hung in case of errors, or whether we want a clean | |
525 | termination even if it takes a while. This routine is automatically | |
526 | always called just before a routine is popped off the target stack. | |
527 | Closing file descriptors and freeing memory are typical things it should | |
528 | do. */ | |
529 | /* Close out all files and local state before this target loses control. */ | |
530 | ||
531 | static void | |
fba45db2 | 532 | gdbsim_close (int quitting) |
c906108c SS |
533 | { |
534 | if (sr_get_debug ()) | |
535 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
536 | ||
537 | program_loaded = 0; | |
538 | ||
539 | if (gdbsim_desc != NULL) | |
540 | { | |
541 | sim_close (gdbsim_desc, quitting); | |
542 | gdbsim_desc = NULL; | |
543 | } | |
544 | ||
545 | end_callbacks (); | |
75660bc0 | 546 | generic_mourn_inferior (); |
c906108c SS |
547 | } |
548 | ||
549 | /* Takes a program previously attached to and detaches it. | |
550 | The program may resume execution (some targets do, some don't) and will | |
551 | no longer stop on signals, etc. We better not have left any breakpoints | |
552 | in the program or it'll die when it hits one. ARGS is arguments | |
553 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
554 | says whether to be verbose or not. */ | |
555 | /* Terminate the open connection to the remote debugger. | |
556 | Use this when you want to detach and do something else with your gdb. */ | |
557 | ||
558 | static void | |
fba45db2 | 559 | gdbsim_detach (char *args, int from_tty) |
c906108c SS |
560 | { |
561 | if (sr_get_debug ()) | |
562 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
563 | ||
564 | pop_target (); /* calls gdbsim_close to do the real work */ | |
565 | if (from_tty) | |
566 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
567 | } | |
c5aa993b | 568 | |
c906108c SS |
569 | /* Resume execution of the target process. STEP says whether to single-step |
570 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
571 | to the target, or zero for no signal. */ | |
572 | ||
573 | static enum target_signal resume_siggnal; | |
574 | static int resume_step; | |
575 | ||
576 | static void | |
39f77062 | 577 | gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c | 578 | { |
39f77062 | 579 | if (PIDGET (inferior_ptid) != 42) |
c906108c SS |
580 | error ("The program is not being run."); |
581 | ||
582 | if (sr_get_debug ()) | |
583 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
584 | ||
585 | resume_siggnal = siggnal; | |
586 | resume_step = step; | |
587 | } | |
588 | ||
589 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 590 | |
c906108c SS |
591 | The simulator shall ensure that the stop request is eventually |
592 | delivered to the simulator. If the call is made while the | |
593 | simulator is not running then the stop request is processed when | |
594 | the simulator is next resumed. | |
595 | ||
596 | For simulators that do not support this operation, just abort */ | |
597 | ||
598 | static void | |
fba45db2 | 599 | gdbsim_stop (void) |
c906108c | 600 | { |
c5aa993b | 601 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
602 | { |
603 | quit (); | |
604 | } | |
605 | } | |
606 | ||
607 | /* GDB version of os_poll_quit callback. | |
608 | Taken from gdb/util.c - should be in a library */ | |
609 | ||
610 | static int | |
fba45db2 | 611 | gdb_os_poll_quit (host_callback *p) |
c906108c | 612 | { |
7a292a7a SS |
613 | if (ui_loop_hook != NULL) |
614 | ui_loop_hook (0); | |
615 | ||
c5aa993b | 616 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 617 | { |
c5aa993b | 618 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
619 | return 1; |
620 | } | |
621 | else if (immediate_quit) | |
622 | { | |
623 | return 1; | |
624 | } | |
625 | return 0; | |
626 | } | |
627 | ||
628 | /* Wait for inferior process to do something. Return pid of child, | |
629 | or -1 in case of error; store status through argument pointer STATUS, | |
630 | just as `wait' would. */ | |
631 | ||
632 | static void | |
fba45db2 | 633 | gdbsim_cntrl_c (int signo) |
c906108c SS |
634 | { |
635 | gdbsim_stop (); | |
636 | } | |
637 | ||
39f77062 KB |
638 | static ptid_t |
639 | gdbsim_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
640 | { |
641 | static RETSIGTYPE (*prev_sigint) (); | |
642 | int sigrc = 0; | |
643 | enum sim_stop reason = sim_running; | |
644 | ||
645 | if (sr_get_debug ()) | |
646 | printf_filtered ("gdbsim_wait\n"); | |
647 | ||
648 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
649 | { | |
650 | struct sigaction sa, osa; | |
651 | sa.sa_handler = gdbsim_cntrl_c; | |
652 | sigemptyset (&sa.sa_mask); | |
653 | sa.sa_flags = 0; | |
654 | sigaction (SIGINT, &sa, &osa); | |
655 | prev_sigint = osa.sa_handler; | |
656 | } | |
657 | #else | |
658 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
659 | #endif | |
660 | sim_resume (gdbsim_desc, resume_step, | |
661 | target_signal_to_host (resume_siggnal)); | |
662 | signal (SIGINT, prev_sigint); | |
663 | resume_step = 0; | |
664 | ||
665 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
666 | ||
667 | switch (reason) | |
668 | { | |
669 | case sim_exited: | |
670 | status->kind = TARGET_WAITKIND_EXITED; | |
671 | status->value.integer = sigrc; | |
672 | break; | |
673 | case sim_stopped: | |
674 | switch (sigrc) | |
675 | { | |
676 | case SIGABRT: | |
677 | quit (); | |
678 | break; | |
679 | case SIGINT: | |
680 | case SIGTRAP: | |
681 | default: | |
682 | status->kind = TARGET_WAITKIND_STOPPED; | |
683 | /* The signal in sigrc is a host signal. That probably | |
684 | should be fixed. */ | |
685 | status->value.sig = target_signal_from_host (sigrc); | |
686 | break; | |
687 | } | |
688 | break; | |
689 | case sim_signalled: | |
690 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
691 | /* The signal in sigrc is a host signal. That probably | |
c5aa993b | 692 | should be fixed. */ |
c906108c SS |
693 | status->value.sig = target_signal_from_host (sigrc); |
694 | break; | |
695 | case sim_running: | |
696 | case sim_polling: | |
697 | /* FIXME: Is this correct? */ | |
698 | break; | |
699 | } | |
700 | ||
39f77062 | 701 | return inferior_ptid; |
c906108c SS |
702 | } |
703 | ||
704 | /* Get ready to modify the registers array. On machines which store | |
705 | individual registers, this doesn't need to do anything. On machines | |
706 | which store all the registers in one fell swoop, this makes sure | |
707 | that registers contains all the registers from the program being | |
708 | debugged. */ | |
709 | ||
710 | static void | |
fba45db2 | 711 | gdbsim_prepare_to_store (void) |
c906108c SS |
712 | { |
713 | /* Do nothing, since we can store individual regs */ | |
714 | } | |
715 | ||
d93bce06 KB |
716 | /* Transfer LEN bytes between GDB address MYADDR and target address |
717 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
718 | otherwise transfer them from the target. TARGET is unused. | |
719 | ||
720 | Returns the number of bytes transferred. */ | |
721 | ||
c906108c | 722 | static int |
d93bce06 | 723 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len, |
0a65a603 AC |
724 | int write, struct mem_attrib *attrib, |
725 | struct target_ops *target) | |
c906108c | 726 | { |
c5aa993b | 727 | if (!program_loaded) |
c906108c SS |
728 | error ("No program loaded."); |
729 | ||
730 | if (sr_get_debug ()) | |
731 | { | |
d4f3574e SS |
732 | /* FIXME: Send to something other than STDOUT? */ |
733 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
734 | gdb_print_host_address (myaddr, gdb_stdout); | |
735 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
736 | paddr_nz (memaddr), len, write); | |
c906108c | 737 | if (sr_get_debug () && write) |
c5aa993b | 738 | dump_mem (myaddr, len); |
c906108c SS |
739 | } |
740 | ||
741 | if (write) | |
742 | { | |
743 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
744 | } | |
c5aa993b | 745 | else |
c906108c SS |
746 | { |
747 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
748 | if (sr_get_debug () && len > 0) | |
c5aa993b JM |
749 | dump_mem (myaddr, len); |
750 | } | |
c906108c SS |
751 | return len; |
752 | } | |
753 | ||
754 | static void | |
fba45db2 | 755 | gdbsim_files_info (struct target_ops *target) |
c906108c SS |
756 | { |
757 | char *file = "nothing"; | |
758 | ||
759 | if (exec_bfd) | |
760 | file = bfd_get_filename (exec_bfd); | |
761 | ||
762 | if (sr_get_debug ()) | |
763 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
764 | ||
765 | if (exec_bfd) | |
766 | { | |
767 | printf_filtered ("\tAttached to %s running program %s\n", | |
768 | target_shortname, file); | |
769 | sim_info (gdbsim_desc, 0); | |
770 | } | |
771 | } | |
772 | ||
773 | /* Clear the simulator's notion of what the break points are. */ | |
774 | ||
775 | static void | |
fba45db2 | 776 | gdbsim_mourn_inferior (void) |
c5aa993b | 777 | { |
c906108c SS |
778 | if (sr_get_debug ()) |
779 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
780 | ||
781 | remove_breakpoints (); | |
782 | generic_mourn_inferior (); | |
783 | } | |
784 | ||
785 | static int | |
fba45db2 | 786 | gdbsim_insert_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
787 | { |
788 | #ifdef SIM_HAS_BREAKPOINTS | |
789 | SIM_RC retcode; | |
790 | ||
791 | retcode = sim_set_breakpoint (gdbsim_desc, addr); | |
792 | ||
793 | switch (retcode) | |
794 | { | |
795 | case SIM_RC_OK: | |
796 | return 0; | |
797 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
798 | return ENOMEM; | |
799 | default: | |
800 | return EIO; | |
801 | } | |
802 | #else | |
803 | return memory_insert_breakpoint (addr, contents_cache); | |
804 | #endif | |
805 | } | |
806 | ||
807 | static int | |
fba45db2 | 808 | gdbsim_remove_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
809 | { |
810 | #ifdef SIM_HAS_BREAKPOINTS | |
811 | SIM_RC retcode; | |
812 | ||
813 | retcode = sim_clear_breakpoint (gdbsim_desc, addr); | |
814 | ||
815 | switch (retcode) | |
816 | { | |
817 | case SIM_RC_OK: | |
818 | case SIM_RC_UNKNOWN_BREAKPOINT: | |
819 | return 0; | |
820 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
821 | return ENOMEM; | |
822 | default: | |
823 | return EIO; | |
824 | } | |
825 | #else | |
826 | return memory_remove_breakpoint (addr, contents_cache); | |
827 | #endif | |
828 | } | |
829 | ||
830 | /* Pass the command argument through to the simulator verbatim. The | |
831 | simulator must do any command interpretation work. */ | |
832 | ||
833 | void | |
fba45db2 | 834 | simulator_command (char *args, int from_tty) |
c906108c SS |
835 | { |
836 | if (gdbsim_desc == NULL) | |
837 | { | |
838 | ||
839 | /* PREVIOUSLY: The user may give a command before the simulator | |
840 | is opened. [...] (??? assuming of course one wishes to | |
841 | continue to allow commands to be sent to unopened simulators, | |
842 | which isn't entirely unreasonable). */ | |
843 | ||
844 | /* The simulator is a builtin abstraction of a remote target. | |
845 | Consistent with that model, access to the simulator, via sim | |
846 | commands, is restricted to the period when the channel to the | |
847 | simulator is open. */ | |
848 | ||
849 | error ("Not connected to the simulator target"); | |
850 | } | |
851 | ||
852 | sim_do_command (gdbsim_desc, args); | |
853 | ||
854 | /* Invalidate the register cache, in case the simulator command does | |
855 | something funny. */ | |
c5aa993b | 856 | registers_changed (); |
c906108c SS |
857 | } |
858 | ||
859 | /* Define the target subroutine names */ | |
860 | ||
c5aa993b JM |
861 | struct target_ops gdbsim_ops; |
862 | ||
863 | static void | |
864 | init_gdbsim_ops (void) | |
865 | { | |
866 | gdbsim_ops.to_shortname = "sim"; | |
867 | gdbsim_ops.to_longname = "simulator"; | |
868 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
869 | gdbsim_ops.to_open = gdbsim_open; | |
870 | gdbsim_ops.to_close = gdbsim_close; | |
871 | gdbsim_ops.to_attach = NULL; | |
872 | gdbsim_ops.to_post_attach = NULL; | |
873 | gdbsim_ops.to_require_attach = NULL; | |
874 | gdbsim_ops.to_detach = gdbsim_detach; | |
875 | gdbsim_ops.to_require_detach = NULL; | |
876 | gdbsim_ops.to_resume = gdbsim_resume; | |
877 | gdbsim_ops.to_wait = gdbsim_wait; | |
878 | gdbsim_ops.to_post_wait = NULL; | |
879 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; | |
880 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
881 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
882 | gdbsim_ops.to_xfer_memory = gdbsim_xfer_inferior_memory; | |
883 | gdbsim_ops.to_files_info = gdbsim_files_info; | |
884 | gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint; | |
885 | gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint; | |
886 | gdbsim_ops.to_terminal_init = NULL; | |
887 | gdbsim_ops.to_terminal_inferior = NULL; | |
888 | gdbsim_ops.to_terminal_ours_for_output = NULL; | |
889 | gdbsim_ops.to_terminal_ours = NULL; | |
890 | gdbsim_ops.to_terminal_info = NULL; | |
891 | gdbsim_ops.to_kill = gdbsim_kill; | |
892 | gdbsim_ops.to_load = gdbsim_load; | |
893 | gdbsim_ops.to_lookup_symbol = NULL; | |
894 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; | |
c906108c SS |
895 | gdbsim_ops.to_post_startup_inferior = NULL; |
896 | gdbsim_ops.to_acknowledge_created_inferior = NULL; | |
897 | gdbsim_ops.to_clone_and_follow_inferior = NULL; | |
898 | gdbsim_ops.to_post_follow_inferior_by_clone = NULL; | |
899 | gdbsim_ops.to_insert_fork_catchpoint = NULL; | |
900 | gdbsim_ops.to_remove_fork_catchpoint = NULL; | |
901 | gdbsim_ops.to_insert_vfork_catchpoint = NULL; | |
902 | gdbsim_ops.to_remove_vfork_catchpoint = NULL; | |
903 | gdbsim_ops.to_has_forked = NULL; | |
904 | gdbsim_ops.to_has_vforked = NULL; | |
905 | gdbsim_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
906 | gdbsim_ops.to_post_follow_vfork = NULL; | |
907 | gdbsim_ops.to_insert_exec_catchpoint = NULL; | |
908 | gdbsim_ops.to_remove_exec_catchpoint = NULL; | |
909 | gdbsim_ops.to_has_execd = NULL; | |
910 | gdbsim_ops.to_reported_exec_events_per_exec_call = NULL; | |
911 | gdbsim_ops.to_has_exited = NULL; | |
c5aa993b JM |
912 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
913 | gdbsim_ops.to_can_run = 0; | |
914 | gdbsim_ops.to_notice_signals = 0; | |
915 | gdbsim_ops.to_thread_alive = 0; | |
916 | gdbsim_ops.to_stop = gdbsim_stop; | |
917 | gdbsim_ops.to_pid_to_exec_file = NULL; | |
c5aa993b JM |
918 | gdbsim_ops.to_stratum = process_stratum; |
919 | gdbsim_ops.DONT_USE = NULL; | |
920 | gdbsim_ops.to_has_all_memory = 1; | |
921 | gdbsim_ops.to_has_memory = 1; | |
922 | gdbsim_ops.to_has_stack = 1; | |
923 | gdbsim_ops.to_has_registers = 1; | |
924 | gdbsim_ops.to_has_execution = 1; | |
925 | gdbsim_ops.to_sections = NULL; | |
926 | gdbsim_ops.to_sections_end = NULL; | |
927 | gdbsim_ops.to_magic = OPS_MAGIC; | |
c906108c SS |
928 | |
929 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
930 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
931 | #endif | |
932 | } | |
933 | ||
934 | void | |
fba45db2 | 935 | _initialize_remote_sim (void) |
c906108c | 936 | { |
c5aa993b | 937 | init_gdbsim_ops (); |
c906108c SS |
938 | add_target (&gdbsim_ops); |
939 | ||
940 | add_com ("sim <command>", class_obscure, simulator_command, | |
c5aa993b | 941 | "Send a command to the simulator."); |
c906108c | 942 | } |