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