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" | |
3c25f8c7 AC |
38 | #include "gdb/callback.h" |
39 | #include "gdb/remote-sim.h" | |
c906108c SS |
40 | #include "remote-utils.h" |
41 | #include "command.h" | |
4e052eda | 42 | #include "regcache.h" |
8238d0bf AC |
43 | #include "gdb_assert.h" |
44 | #include "sim-regno.h" | |
a8cf2722 | 45 | #include "arch-utils.h" |
c906108c SS |
46 | |
47 | /* Prototypes */ | |
48 | ||
a14ed312 | 49 | extern void _initialize_remote_sim (void); |
392a587b | 50 | |
507f3c78 | 51 | extern int (*ui_loop_hook) (int signo); |
7a292a7a | 52 | |
a14ed312 | 53 | static void dump_mem (char *buf, int len); |
c906108c | 54 | |
a14ed312 | 55 | static void init_callbacks (void); |
c906108c | 56 | |
a14ed312 | 57 | static void end_callbacks (void); |
c906108c | 58 | |
a14ed312 | 59 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 60 | |
a14ed312 | 61 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 62 | |
a14ed312 | 63 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 64 | |
a14ed312 | 65 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 66 | |
a14ed312 | 67 | static int gdb_os_poll_quit (host_callback *); |
c906108c SS |
68 | |
69 | /* printf_filtered is depreciated */ | |
a14ed312 | 70 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 71 | |
a14ed312 | 72 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 73 | |
a14ed312 | 74 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 75 | |
a14ed312 | 76 | static void gdb_os_error (host_callback *, const char *, ...); |
c906108c | 77 | |
a14ed312 | 78 | static void gdbsim_fetch_register (int regno); |
c906108c | 79 | |
a14ed312 | 80 | static void gdbsim_store_register (int regno); |
c906108c | 81 | |
a14ed312 | 82 | static void gdbsim_kill (void); |
c906108c | 83 | |
a14ed312 | 84 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 85 | |
a14ed312 | 86 | static void gdbsim_create_inferior (char *exec_file, char *args, char **env); |
c906108c | 87 | |
a14ed312 | 88 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 89 | |
a14ed312 | 90 | static void gdbsim_close (int quitting); |
c906108c | 91 | |
a14ed312 | 92 | static void gdbsim_detach (char *args, int from_tty); |
c906108c | 93 | |
39f77062 | 94 | static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal); |
c906108c | 95 | |
39f77062 | 96 | static ptid_t gdbsim_wait (ptid_t ptid, struct target_waitstatus *status); |
c906108c | 97 | |
a14ed312 | 98 | static void gdbsim_prepare_to_store (void); |
c906108c | 99 | |
29e57380 C |
100 | static int gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, |
101 | int len, int write, | |
102 | struct mem_attrib *attrib, | |
103 | struct target_ops *target); | |
c906108c | 104 | |
a14ed312 | 105 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 106 | |
a14ed312 | 107 | static void gdbsim_mourn_inferior (void); |
c906108c | 108 | |
a14ed312 | 109 | static void gdbsim_stop (void); |
c906108c | 110 | |
a14ed312 | 111 | void simulator_command (char *args, int from_tty); |
c906108c SS |
112 | |
113 | /* Naming convention: | |
114 | ||
115 | sim_* are the interface to the simulator (see remote-sim.h). | |
116 | gdbsim_* are stuff which is internal to gdb. */ | |
117 | ||
118 | /* Forward data declarations */ | |
119 | extern struct target_ops gdbsim_ops; | |
120 | ||
121 | static int program_loaded = 0; | |
122 | ||
123 | /* We must keep track of whether the simulator has been opened or not because | |
124 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
125 | this. We also need to record the result of sim_open so we can pass it | |
126 | back to the other sim_foo routines. */ | |
127 | static SIM_DESC gdbsim_desc = 0; | |
128 | ||
129 | static void | |
fba45db2 | 130 | dump_mem (char *buf, int len) |
c906108c SS |
131 | { |
132 | if (len <= 8) | |
133 | { | |
134 | if (len == 8 || len == 4) | |
135 | { | |
136 | long l[2]; | |
137 | memcpy (l, buf, len); | |
d4f3574e | 138 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
139 | if (len == 8) |
140 | printf_filtered (" 0x%lx", l[1]); | |
141 | printf_filtered ("\n"); | |
c906108c SS |
142 | } |
143 | else | |
144 | { | |
145 | int i; | |
146 | printf_filtered ("\t"); | |
147 | for (i = 0; i < len; i++) | |
148 | printf_filtered ("0x%x ", buf[i]); | |
149 | printf_filtered ("\n"); | |
150 | } | |
151 | } | |
152 | } | |
153 | ||
154 | static host_callback gdb_callback; | |
155 | static int callbacks_initialized = 0; | |
156 | ||
157 | /* Initialize gdb_callback. */ | |
158 | ||
159 | static void | |
fba45db2 | 160 | init_callbacks (void) |
c906108c | 161 | { |
c5aa993b | 162 | if (!callbacks_initialized) |
c906108c SS |
163 | { |
164 | gdb_callback = default_callback; | |
165 | gdb_callback.init (&gdb_callback); | |
166 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
167 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
168 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
169 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
170 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
171 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
172 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
173 | gdb_callback.error = gdb_os_error; | |
174 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
175 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
176 | callbacks_initialized = 1; | |
177 | } | |
178 | } | |
179 | ||
180 | /* Release callbacks (free resources used by them). */ | |
181 | ||
182 | static void | |
fba45db2 | 183 | end_callbacks (void) |
c906108c SS |
184 | { |
185 | if (callbacks_initialized) | |
186 | { | |
187 | gdb_callback.shutdown (&gdb_callback); | |
188 | callbacks_initialized = 0; | |
189 | } | |
190 | } | |
191 | ||
192 | /* GDB version of os_write_stdout callback. */ | |
193 | ||
c5aa993b | 194 | static int |
fba45db2 | 195 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
196 | { |
197 | int i; | |
198 | char b[2]; | |
199 | ||
d9fcf2fb | 200 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
201 | return len; |
202 | } | |
203 | ||
204 | /* GDB version of os_flush_stdout callback. */ | |
205 | ||
206 | static void | |
fba45db2 | 207 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 208 | { |
4ce44c66 | 209 | gdb_flush (gdb_stdtarg); |
c906108c SS |
210 | } |
211 | ||
212 | /* GDB version of os_write_stderr callback. */ | |
213 | ||
c5aa993b | 214 | static int |
fba45db2 | 215 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
216 | { |
217 | int i; | |
218 | char b[2]; | |
219 | ||
c5aa993b | 220 | for (i = 0; i < len; i++) |
c906108c SS |
221 | { |
222 | b[0] = buf[i]; | |
223 | b[1] = 0; | |
43ff13b4 | 224 | fputs_unfiltered (b, gdb_stdtarg); |
c906108c SS |
225 | } |
226 | return len; | |
227 | } | |
228 | ||
229 | /* GDB version of os_flush_stderr callback. */ | |
230 | ||
231 | static void | |
fba45db2 | 232 | gdb_os_flush_stderr (host_callback *p) |
c906108c SS |
233 | { |
234 | gdb_flush (gdb_stderr); | |
235 | } | |
236 | ||
237 | /* GDB version of printf_filtered callback. */ | |
238 | ||
c906108c | 239 | static void |
c5aa993b | 240 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
241 | { |
242 | va_list args; | |
c906108c | 243 | va_start (args, format); |
c906108c SS |
244 | |
245 | vfprintf_filtered (gdb_stdout, format, args); | |
246 | ||
247 | va_end (args); | |
248 | } | |
249 | ||
250 | /* GDB version of error vprintf_filtered. */ | |
251 | ||
c906108c | 252 | static void |
c5aa993b | 253 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
254 | { |
255 | vfprintf_filtered (gdb_stdout, format, ap); | |
256 | } | |
257 | ||
258 | /* GDB version of error evprintf_filtered. */ | |
259 | ||
c906108c | 260 | static void |
c5aa993b | 261 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
262 | { |
263 | vfprintf_filtered (gdb_stderr, format, ap); | |
264 | } | |
265 | ||
266 | /* GDB version of error callback. */ | |
267 | ||
c906108c | 268 | static void |
c5aa993b | 269 | gdb_os_error (host_callback * p, const char *format,...) |
c906108c SS |
270 | { |
271 | if (error_hook) | |
272 | (*error_hook) (); | |
c5aa993b | 273 | else |
c906108c SS |
274 | { |
275 | va_list args; | |
c906108c | 276 | va_start (args, format); |
4ce44c66 | 277 | verror (format, args); |
c906108c | 278 | va_end (args); |
c906108c SS |
279 | } |
280 | } | |
281 | ||
8238d0bf AC |
282 | int |
283 | one2one_register_sim_regno (int regnum) | |
284 | { | |
285 | /* Only makes sense to supply raw registers. */ | |
286 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
287 | return regnum; | |
288 | } | |
289 | ||
c906108c | 290 | static void |
fba45db2 | 291 | gdbsim_fetch_register (int regno) |
c906108c | 292 | { |
c5aa993b | 293 | if (regno == -1) |
c906108c SS |
294 | { |
295 | for (regno = 0; regno < NUM_REGS; regno++) | |
296 | gdbsim_fetch_register (regno); | |
8238d0bf | 297 | return; |
c906108c | 298 | } |
8238d0bf AC |
299 | |
300 | switch (REGISTER_SIM_REGNO (regno)) | |
c906108c | 301 | { |
8238d0bf AC |
302 | case LEGACY_SIM_REGNO_IGNORE: |
303 | break; | |
304 | case SIM_REGNO_DOES_NOT_EXIST: | |
305 | { | |
306 | /* For moment treat a `does not exist' register the same way | |
307 | as an ``unavailable'' register. */ | |
d9d9c31f | 308 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 309 | int nr_bytes; |
d9d9c31f | 310 | memset (buf, 0, MAX_REGISTER_SIZE); |
8238d0bf AC |
311 | supply_register (regno, buf); |
312 | set_register_cached (regno, -1); | |
313 | break; | |
314 | } | |
315 | default: | |
316 | { | |
317 | static int warn_user = 1; | |
d9d9c31f | 318 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf AC |
319 | int nr_bytes; |
320 | gdb_assert (regno >= 0 && regno < NUM_REGS); | |
d9d9c31f | 321 | memset (buf, 0, MAX_REGISTER_SIZE); |
d4f3574e SS |
322 | nr_bytes = sim_fetch_register (gdbsim_desc, |
323 | REGISTER_SIM_REGNO (regno), | |
12c266ea AC |
324 | buf, DEPRECATED_REGISTER_RAW_SIZE (regno)); |
325 | if (nr_bytes > 0 && nr_bytes != DEPRECATED_REGISTER_RAW_SIZE (regno) && warn_user) | |
8238d0bf AC |
326 | { |
327 | fprintf_unfiltered (gdb_stderr, | |
328 | "Size of register %s (%d/%d) incorrect (%d instead of %d))", | |
329 | REGISTER_NAME (regno), | |
330 | regno, REGISTER_SIM_REGNO (regno), | |
12c266ea | 331 | nr_bytes, DEPRECATED_REGISTER_RAW_SIZE (regno)); |
8238d0bf AC |
332 | warn_user = 0; |
333 | } | |
334 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 335 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
336 | which registers are fetchable. */ |
337 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
338 | think to return the register size. Just assume all is ok. */ | |
339 | supply_register (regno, buf); | |
340 | if (sr_get_debug ()) | |
341 | { | |
342 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
343 | /* FIXME: We could print something more intelligible. */ | |
12c266ea | 344 | dump_mem (buf, DEPRECATED_REGISTER_RAW_SIZE (regno)); |
8238d0bf AC |
345 | } |
346 | break; | |
347 | } | |
c906108c SS |
348 | } |
349 | } | |
350 | ||
351 | ||
352 | static void | |
fba45db2 | 353 | gdbsim_store_register (int regno) |
c906108c | 354 | { |
c5aa993b | 355 | if (regno == -1) |
c906108c SS |
356 | { |
357 | for (regno = 0; regno < NUM_REGS; regno++) | |
358 | gdbsim_store_register (regno); | |
8238d0bf | 359 | return; |
c906108c | 360 | } |
8238d0bf | 361 | else if (REGISTER_SIM_REGNO (regno) >= 0) |
c906108c | 362 | { |
123a958e | 363 | char tmp[MAX_REGISTER_SIZE]; |
c906108c | 364 | int nr_bytes; |
4caf0990 | 365 | deprecated_read_register_gen (regno, tmp); |
d4f3574e SS |
366 | nr_bytes = sim_store_register (gdbsim_desc, |
367 | REGISTER_SIM_REGNO (regno), | |
12c266ea AC |
368 | tmp, DEPRECATED_REGISTER_RAW_SIZE (regno)); |
369 | if (nr_bytes > 0 && nr_bytes != DEPRECATED_REGISTER_RAW_SIZE (regno)) | |
8e65ff28 AC |
370 | internal_error (__FILE__, __LINE__, |
371 | "Register size different to expected"); | |
8238d0bf | 372 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' |
278a7cf7 | 373 | indicating that GDB and the SIM have different ideas about |
8238d0bf | 374 | which registers are fetchable. */ |
c906108c SS |
375 | if (sr_get_debug ()) |
376 | { | |
377 | printf_filtered ("gdbsim_store_register: %d", regno); | |
378 | /* FIXME: We could print something more intelligible. */ | |
12c266ea | 379 | dump_mem (tmp, DEPRECATED_REGISTER_RAW_SIZE (regno)); |
c906108c SS |
380 | } |
381 | } | |
382 | } | |
383 | ||
384 | /* Kill the running program. This may involve closing any open files | |
385 | and releasing other resources acquired by the simulated program. */ | |
386 | ||
387 | static void | |
fba45db2 | 388 | gdbsim_kill (void) |
c906108c SS |
389 | { |
390 | if (sr_get_debug ()) | |
391 | printf_filtered ("gdbsim_kill\n"); | |
392 | ||
393 | /* There is no need to `kill' running simulator - the simulator is | |
394 | not running */ | |
39f77062 | 395 | inferior_ptid = null_ptid; |
c906108c SS |
396 | } |
397 | ||
398 | /* Load an executable file into the target process. This is expected to | |
399 | not only bring new code into the target process, but also to update | |
400 | GDB's symbol tables to match. */ | |
401 | ||
402 | static void | |
fba45db2 | 403 | gdbsim_load (char *prog, int fromtty) |
c906108c SS |
404 | { |
405 | if (sr_get_debug ()) | |
406 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
407 | ||
39f77062 | 408 | inferior_ptid = null_ptid; |
c906108c SS |
409 | |
410 | /* FIXME: We will print two messages on error. | |
411 | Need error to either not print anything if passed NULL or need | |
412 | another routine that doesn't take any arguments. */ | |
413 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
414 | error ("unable to load program"); | |
415 | ||
416 | /* FIXME: If a load command should reset the targets registers then | |
417 | a call to sim_create_inferior() should go here. */ | |
418 | ||
419 | program_loaded = 1; | |
420 | } | |
421 | ||
422 | ||
39f77062 | 423 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
424 | EXEC_FILE is the file to run. |
425 | ARGS is a string containing the arguments to the program. | |
426 | ENV is the environment vector to pass. Errors reported with error(). | |
427 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
428 | /* This is called not only when we first attach, but also when the | |
429 | user types "run" after having attached. */ | |
430 | ||
431 | static void | |
fba45db2 | 432 | gdbsim_create_inferior (char *exec_file, char *args, char **env) |
c906108c SS |
433 | { |
434 | int len; | |
c5aa993b | 435 | char *arg_buf, **argv; |
c906108c SS |
436 | |
437 | if (exec_file == 0 || exec_bfd == 0) | |
438 | warning ("No executable file specified."); | |
c5aa993b | 439 | if (!program_loaded) |
c906108c SS |
440 | warning ("No program loaded."); |
441 | ||
442 | if (sr_get_debug ()) | |
443 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
c5aa993b | 444 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
445 | args); |
446 | ||
c5aa993b | 447 | gdbsim_kill (); |
c906108c SS |
448 | remove_breakpoints (); |
449 | init_wait_for_inferior (); | |
450 | ||
451 | if (exec_file != NULL) | |
452 | { | |
c5aa993b | 453 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
454 | arg_buf = (char *) alloca (len); |
455 | arg_buf[0] = '\0'; | |
456 | strcat (arg_buf, exec_file); | |
457 | strcat (arg_buf, " "); | |
458 | strcat (arg_buf, args); | |
459 | argv = buildargv (arg_buf); | |
7a292a7a | 460 | make_cleanup_freeargv (argv); |
c906108c SS |
461 | } |
462 | else | |
463 | argv = NULL; | |
464 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
465 | ||
39f77062 | 466 | inferior_ptid = pid_to_ptid (42); |
c5aa993b | 467 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
468 | |
469 | clear_proceed_status (); | |
470 | ||
471 | /* NB: Entry point already set by sim_create_inferior. */ | |
2acceee2 | 472 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); |
c906108c SS |
473 | } |
474 | ||
475 | /* The open routine takes the rest of the parameters from the command, | |
476 | and (if successful) pushes a new target onto the stack. | |
477 | Targets should supply this routine, if only to provide an error message. */ | |
478 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
479 | ||
480 | static void | |
fba45db2 | 481 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
482 | { |
483 | int len; | |
484 | char *arg_buf; | |
485 | char **argv; | |
486 | ||
487 | if (sr_get_debug ()) | |
488 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
489 | ||
490 | /* Remove current simulator if one exists. Only do this if the simulator | |
491 | has been opened because sim_close requires it. | |
492 | This is important because the call to push_target below will cause | |
493 | sim_close to be called if the simulator is already open, but push_target | |
494 | is called after sim_open! We can't move the call to push_target before | |
495 | the call to sim_open because sim_open may invoke `error'. */ | |
496 | if (gdbsim_desc != NULL) | |
497 | unpush_target (&gdbsim_ops); | |
498 | ||
c5aa993b | 499 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
500 | + strlen (" -E little") |
501 | + strlen (" --architecture=xxxxxxxxxx") | |
502 | + (args ? strlen (args) : 0) | |
c5aa993b | 503 | + 50) /* slack */ ; |
c906108c | 504 | arg_buf = (char *) alloca (len); |
c5aa993b | 505 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
c906108c SS |
506 | /* Specify the byte order for the target when it is both selectable |
507 | and explicitly specified by the user (not auto detected). */ | |
a8cf2722 | 508 | switch (selected_byte_order ()) |
c906108c | 509 | { |
a8cf2722 AC |
510 | case BFD_ENDIAN_BIG: |
511 | strcat (arg_buf, " -E big"); | |
512 | break; | |
513 | case BFD_ENDIAN_LITTLE: | |
514 | strcat (arg_buf, " -E little"); | |
515 | break; | |
516 | case BFD_ENDIAN_UNKNOWN: | |
517 | break; | |
c906108c SS |
518 | } |
519 | /* Specify the architecture of the target when it has been | |
520 | explicitly specified */ | |
a8cf2722 | 521 | if (selected_architecture_name () != NULL) |
c906108c SS |
522 | { |
523 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 524 | strcat (arg_buf, selected_architecture_name ()); |
c906108c SS |
525 | } |
526 | /* finally, any explicit args */ | |
527 | if (args) | |
528 | { | |
c5aa993b | 529 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
530 | strcat (arg_buf, args); |
531 | } | |
532 | argv = buildargv (arg_buf); | |
533 | if (argv == NULL) | |
534 | error ("Insufficient memory available to allocate simulator arg list."); | |
7a292a7a | 535 | make_cleanup_freeargv (argv); |
c906108c SS |
536 | |
537 | init_callbacks (); | |
538 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
539 | ||
540 | if (gdbsim_desc == 0) | |
541 | error ("unable to create simulator instance"); | |
542 | ||
543 | push_target (&gdbsim_ops); | |
544 | target_fetch_registers (-1); | |
545 | printf_filtered ("Connected to the simulator.\n"); | |
546 | } | |
547 | ||
548 | /* Does whatever cleanup is required for a target that we are no longer | |
549 | going to be calling. Argument says whether we are quitting gdb and | |
550 | should not get hung in case of errors, or whether we want a clean | |
551 | termination even if it takes a while. This routine is automatically | |
552 | always called just before a routine is popped off the target stack. | |
553 | Closing file descriptors and freeing memory are typical things it should | |
554 | do. */ | |
555 | /* Close out all files and local state before this target loses control. */ | |
556 | ||
557 | static void | |
fba45db2 | 558 | gdbsim_close (int quitting) |
c906108c SS |
559 | { |
560 | if (sr_get_debug ()) | |
561 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
562 | ||
563 | program_loaded = 0; | |
564 | ||
565 | if (gdbsim_desc != NULL) | |
566 | { | |
567 | sim_close (gdbsim_desc, quitting); | |
568 | gdbsim_desc = NULL; | |
569 | } | |
570 | ||
571 | end_callbacks (); | |
75660bc0 | 572 | generic_mourn_inferior (); |
c906108c SS |
573 | } |
574 | ||
575 | /* Takes a program previously attached to and detaches it. | |
576 | The program may resume execution (some targets do, some don't) and will | |
577 | no longer stop on signals, etc. We better not have left any breakpoints | |
578 | in the program or it'll die when it hits one. ARGS is arguments | |
579 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
580 | says whether to be verbose or not. */ | |
581 | /* Terminate the open connection to the remote debugger. | |
582 | Use this when you want to detach and do something else with your gdb. */ | |
583 | ||
584 | static void | |
fba45db2 | 585 | gdbsim_detach (char *args, int from_tty) |
c906108c SS |
586 | { |
587 | if (sr_get_debug ()) | |
588 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
589 | ||
590 | pop_target (); /* calls gdbsim_close to do the real work */ | |
591 | if (from_tty) | |
592 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
593 | } | |
c5aa993b | 594 | |
c906108c SS |
595 | /* Resume execution of the target process. STEP says whether to single-step |
596 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
597 | to the target, or zero for no signal. */ | |
598 | ||
599 | static enum target_signal resume_siggnal; | |
600 | static int resume_step; | |
601 | ||
602 | static void | |
39f77062 | 603 | gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c | 604 | { |
39f77062 | 605 | if (PIDGET (inferior_ptid) != 42) |
c906108c SS |
606 | error ("The program is not being run."); |
607 | ||
608 | if (sr_get_debug ()) | |
609 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
610 | ||
611 | resume_siggnal = siggnal; | |
612 | resume_step = step; | |
613 | } | |
614 | ||
615 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 616 | |
c906108c SS |
617 | The simulator shall ensure that the stop request is eventually |
618 | delivered to the simulator. If the call is made while the | |
619 | simulator is not running then the stop request is processed when | |
620 | the simulator is next resumed. | |
621 | ||
622 | For simulators that do not support this operation, just abort */ | |
623 | ||
624 | static void | |
fba45db2 | 625 | gdbsim_stop (void) |
c906108c | 626 | { |
c5aa993b | 627 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
628 | { |
629 | quit (); | |
630 | } | |
631 | } | |
632 | ||
633 | /* GDB version of os_poll_quit callback. | |
634 | Taken from gdb/util.c - should be in a library */ | |
635 | ||
636 | static int | |
fba45db2 | 637 | gdb_os_poll_quit (host_callback *p) |
c906108c | 638 | { |
7a292a7a SS |
639 | if (ui_loop_hook != NULL) |
640 | ui_loop_hook (0); | |
641 | ||
c5aa993b | 642 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 643 | { |
c5aa993b | 644 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
645 | return 1; |
646 | } | |
647 | else if (immediate_quit) | |
648 | { | |
649 | return 1; | |
650 | } | |
651 | return 0; | |
652 | } | |
653 | ||
654 | /* Wait for inferior process to do something. Return pid of child, | |
655 | or -1 in case of error; store status through argument pointer STATUS, | |
656 | just as `wait' would. */ | |
657 | ||
658 | static void | |
fba45db2 | 659 | gdbsim_cntrl_c (int signo) |
c906108c SS |
660 | { |
661 | gdbsim_stop (); | |
662 | } | |
663 | ||
39f77062 KB |
664 | static ptid_t |
665 | gdbsim_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
666 | { |
667 | static RETSIGTYPE (*prev_sigint) (); | |
668 | int sigrc = 0; | |
669 | enum sim_stop reason = sim_running; | |
670 | ||
671 | if (sr_get_debug ()) | |
672 | printf_filtered ("gdbsim_wait\n"); | |
673 | ||
674 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
675 | { | |
676 | struct sigaction sa, osa; | |
677 | sa.sa_handler = gdbsim_cntrl_c; | |
678 | sigemptyset (&sa.sa_mask); | |
679 | sa.sa_flags = 0; | |
680 | sigaction (SIGINT, &sa, &osa); | |
681 | prev_sigint = osa.sa_handler; | |
682 | } | |
683 | #else | |
684 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
685 | #endif | |
686 | sim_resume (gdbsim_desc, resume_step, | |
687 | target_signal_to_host (resume_siggnal)); | |
688 | signal (SIGINT, prev_sigint); | |
689 | resume_step = 0; | |
690 | ||
691 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
692 | ||
693 | switch (reason) | |
694 | { | |
695 | case sim_exited: | |
696 | status->kind = TARGET_WAITKIND_EXITED; | |
697 | status->value.integer = sigrc; | |
698 | break; | |
699 | case sim_stopped: | |
700 | switch (sigrc) | |
701 | { | |
702 | case SIGABRT: | |
703 | quit (); | |
704 | break; | |
705 | case SIGINT: | |
706 | case SIGTRAP: | |
707 | default: | |
708 | status->kind = TARGET_WAITKIND_STOPPED; | |
709 | /* The signal in sigrc is a host signal. That probably | |
710 | should be fixed. */ | |
711 | status->value.sig = target_signal_from_host (sigrc); | |
712 | break; | |
713 | } | |
714 | break; | |
715 | case sim_signalled: | |
716 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
717 | /* The signal in sigrc is a host signal. That probably | |
c5aa993b | 718 | should be fixed. */ |
c906108c SS |
719 | status->value.sig = target_signal_from_host (sigrc); |
720 | break; | |
721 | case sim_running: | |
722 | case sim_polling: | |
723 | /* FIXME: Is this correct? */ | |
724 | break; | |
725 | } | |
726 | ||
39f77062 | 727 | return inferior_ptid; |
c906108c SS |
728 | } |
729 | ||
730 | /* Get ready to modify the registers array. On machines which store | |
731 | individual registers, this doesn't need to do anything. On machines | |
732 | which store all the registers in one fell swoop, this makes sure | |
733 | that registers contains all the registers from the program being | |
734 | debugged. */ | |
735 | ||
736 | static void | |
fba45db2 | 737 | gdbsim_prepare_to_store (void) |
c906108c SS |
738 | { |
739 | /* Do nothing, since we can store individual regs */ | |
740 | } | |
741 | ||
d93bce06 KB |
742 | /* Transfer LEN bytes between GDB address MYADDR and target address |
743 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
744 | otherwise transfer them from the target. TARGET is unused. | |
745 | ||
746 | Returns the number of bytes transferred. */ | |
747 | ||
c906108c | 748 | static int |
d93bce06 | 749 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len, |
0a65a603 AC |
750 | int write, struct mem_attrib *attrib, |
751 | struct target_ops *target) | |
c906108c | 752 | { |
c5aa993b | 753 | if (!program_loaded) |
c906108c SS |
754 | error ("No program loaded."); |
755 | ||
756 | if (sr_get_debug ()) | |
757 | { | |
d4f3574e SS |
758 | /* FIXME: Send to something other than STDOUT? */ |
759 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
760 | gdb_print_host_address (myaddr, gdb_stdout); | |
761 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
762 | paddr_nz (memaddr), len, write); | |
c906108c | 763 | if (sr_get_debug () && write) |
c5aa993b | 764 | dump_mem (myaddr, len); |
c906108c SS |
765 | } |
766 | ||
767 | if (write) | |
768 | { | |
769 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
770 | } | |
c5aa993b | 771 | else |
c906108c SS |
772 | { |
773 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
774 | if (sr_get_debug () && len > 0) | |
c5aa993b JM |
775 | dump_mem (myaddr, len); |
776 | } | |
c906108c SS |
777 | return len; |
778 | } | |
779 | ||
780 | static void | |
fba45db2 | 781 | gdbsim_files_info (struct target_ops *target) |
c906108c SS |
782 | { |
783 | char *file = "nothing"; | |
784 | ||
785 | if (exec_bfd) | |
786 | file = bfd_get_filename (exec_bfd); | |
787 | ||
788 | if (sr_get_debug ()) | |
789 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
790 | ||
791 | if (exec_bfd) | |
792 | { | |
793 | printf_filtered ("\tAttached to %s running program %s\n", | |
794 | target_shortname, file); | |
795 | sim_info (gdbsim_desc, 0); | |
796 | } | |
797 | } | |
798 | ||
799 | /* Clear the simulator's notion of what the break points are. */ | |
800 | ||
801 | static void | |
fba45db2 | 802 | gdbsim_mourn_inferior (void) |
c5aa993b | 803 | { |
c906108c SS |
804 | if (sr_get_debug ()) |
805 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
806 | ||
807 | remove_breakpoints (); | |
808 | generic_mourn_inferior (); | |
809 | } | |
810 | ||
811 | static int | |
fba45db2 | 812 | gdbsim_insert_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c | 813 | { |
c906108c | 814 | return memory_insert_breakpoint (addr, contents_cache); |
c906108c SS |
815 | } |
816 | ||
817 | static int | |
fba45db2 | 818 | gdbsim_remove_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c | 819 | { |
c906108c | 820 | return memory_remove_breakpoint (addr, contents_cache); |
c906108c SS |
821 | } |
822 | ||
823 | /* Pass the command argument through to the simulator verbatim. The | |
824 | simulator must do any command interpretation work. */ | |
825 | ||
826 | void | |
fba45db2 | 827 | simulator_command (char *args, int from_tty) |
c906108c SS |
828 | { |
829 | if (gdbsim_desc == NULL) | |
830 | { | |
831 | ||
832 | /* PREVIOUSLY: The user may give a command before the simulator | |
833 | is opened. [...] (??? assuming of course one wishes to | |
834 | continue to allow commands to be sent to unopened simulators, | |
835 | which isn't entirely unreasonable). */ | |
836 | ||
837 | /* The simulator is a builtin abstraction of a remote target. | |
838 | Consistent with that model, access to the simulator, via sim | |
839 | commands, is restricted to the period when the channel to the | |
840 | simulator is open. */ | |
841 | ||
842 | error ("Not connected to the simulator target"); | |
843 | } | |
844 | ||
845 | sim_do_command (gdbsim_desc, args); | |
846 | ||
847 | /* Invalidate the register cache, in case the simulator command does | |
848 | something funny. */ | |
c5aa993b | 849 | registers_changed (); |
c906108c SS |
850 | } |
851 | ||
852 | /* Define the target subroutine names */ | |
853 | ||
c5aa993b JM |
854 | struct target_ops gdbsim_ops; |
855 | ||
856 | static void | |
857 | init_gdbsim_ops (void) | |
858 | { | |
859 | gdbsim_ops.to_shortname = "sim"; | |
860 | gdbsim_ops.to_longname = "simulator"; | |
861 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
862 | gdbsim_ops.to_open = gdbsim_open; | |
863 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 864 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
865 | gdbsim_ops.to_resume = gdbsim_resume; |
866 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
867 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
868 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
869 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
870 | gdbsim_ops.to_xfer_memory = gdbsim_xfer_inferior_memory; | |
871 | gdbsim_ops.to_files_info = gdbsim_files_info; | |
872 | gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint; | |
873 | gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint; | |
c5aa993b JM |
874 | gdbsim_ops.to_kill = gdbsim_kill; |
875 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 876 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 877 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 878 | gdbsim_ops.to_stop = gdbsim_stop; |
c5aa993b | 879 | gdbsim_ops.to_stratum = process_stratum; |
c5aa993b JM |
880 | gdbsim_ops.to_has_all_memory = 1; |
881 | gdbsim_ops.to_has_memory = 1; | |
882 | gdbsim_ops.to_has_stack = 1; | |
883 | gdbsim_ops.to_has_registers = 1; | |
884 | gdbsim_ops.to_has_execution = 1; | |
c5aa993b | 885 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
886 | |
887 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
888 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
889 | #endif | |
890 | } | |
891 | ||
892 | void | |
fba45db2 | 893 | _initialize_remote_sim (void) |
c906108c | 894 | { |
c5aa993b | 895 | init_gdbsim_ops (); |
c906108c SS |
896 | add_target (&gdbsim_ops); |
897 | ||
898 | add_com ("sim <command>", class_obscure, simulator_command, | |
c5aa993b | 899 | "Send a command to the simulator."); |
c906108c | 900 | } |