Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
6aba47ca | 3 | Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
9b254dd1 | 4 | 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
0a65a603 | 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 | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 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 | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "inferior.h" | |
c906108c SS |
26 | #include "value.h" |
27 | #include "gdb_string.h" | |
28 | #include <ctype.h> | |
29 | #include <fcntl.h> | |
30 | #include <signal.h> | |
31 | #include <setjmp.h> | |
32 | #include <errno.h> | |
33 | #include "terminal.h" | |
34 | #include "target.h" | |
35 | #include "gdbcore.h" | |
3c25f8c7 AC |
36 | #include "gdb/callback.h" |
37 | #include "gdb/remote-sim.h" | |
c906108c | 38 | #include "command.h" |
4e052eda | 39 | #include "regcache.h" |
8238d0bf AC |
40 | #include "gdb_assert.h" |
41 | #include "sim-regno.h" | |
a8cf2722 | 42 | #include "arch-utils.h" |
1986bccd | 43 | #include "readline/readline.h" |
c906108c SS |
44 | |
45 | /* Prototypes */ | |
46 | ||
a14ed312 | 47 | extern void _initialize_remote_sim (void); |
392a587b | 48 | |
a14ed312 | 49 | static void dump_mem (char *buf, int len); |
c906108c | 50 | |
a14ed312 | 51 | static void init_callbacks (void); |
c906108c | 52 | |
a14ed312 | 53 | static void end_callbacks (void); |
c906108c | 54 | |
a14ed312 | 55 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 56 | |
a14ed312 | 57 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 58 | |
a14ed312 | 59 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 60 | |
a14ed312 | 61 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 62 | |
a14ed312 | 63 | static int gdb_os_poll_quit (host_callback *); |
c906108c SS |
64 | |
65 | /* printf_filtered is depreciated */ | |
a14ed312 | 66 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 67 | |
a14ed312 | 68 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 69 | |
a14ed312 | 70 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 71 | |
a14ed312 | 72 | static void gdb_os_error (host_callback *, const char *, ...); |
c906108c | 73 | |
56be3814 | 74 | static void gdbsim_fetch_register (struct regcache *regcache, int regno); |
c906108c | 75 | |
56be3814 | 76 | static void gdbsim_store_register (struct regcache *regcache, int regno); |
c906108c | 77 | |
a14ed312 | 78 | static void gdbsim_kill (void); |
c906108c | 79 | |
a14ed312 | 80 | static void gdbsim_load (char *prog, int fromtty); |
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 | |
39f77062 | 88 | static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal); |
c906108c | 89 | |
39f77062 | 90 | static ptid_t gdbsim_wait (ptid_t ptid, struct target_waitstatus *status); |
c906108c | 91 | |
316f2060 | 92 | static void gdbsim_prepare_to_store (struct regcache *regcache); |
c906108c | 93 | |
a14ed312 | 94 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 95 | |
a14ed312 | 96 | static void gdbsim_mourn_inferior (void); |
c906108c | 97 | |
a14ed312 | 98 | static void gdbsim_stop (void); |
c906108c | 99 | |
a14ed312 | 100 | void simulator_command (char *args, int from_tty); |
c906108c SS |
101 | |
102 | /* Naming convention: | |
103 | ||
104 | sim_* are the interface to the simulator (see remote-sim.h). | |
105 | gdbsim_* are stuff which is internal to gdb. */ | |
106 | ||
107 | /* Forward data declarations */ | |
108 | extern struct target_ops gdbsim_ops; | |
109 | ||
110 | static int program_loaded = 0; | |
111 | ||
112 | /* We must keep track of whether the simulator has been opened or not because | |
113 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
114 | this. We also need to record the result of sim_open so we can pass it | |
115 | back to the other sim_foo routines. */ | |
116 | static SIM_DESC gdbsim_desc = 0; | |
117 | ||
118 | static void | |
fba45db2 | 119 | dump_mem (char *buf, int len) |
c906108c SS |
120 | { |
121 | if (len <= 8) | |
122 | { | |
123 | if (len == 8 || len == 4) | |
124 | { | |
125 | long l[2]; | |
126 | memcpy (l, buf, len); | |
d4f3574e | 127 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
128 | if (len == 8) |
129 | printf_filtered (" 0x%lx", l[1]); | |
130 | printf_filtered ("\n"); | |
c906108c SS |
131 | } |
132 | else | |
133 | { | |
134 | int i; | |
135 | printf_filtered ("\t"); | |
136 | for (i = 0; i < len; i++) | |
137 | printf_filtered ("0x%x ", buf[i]); | |
138 | printf_filtered ("\n"); | |
139 | } | |
140 | } | |
141 | } | |
142 | ||
143 | static host_callback gdb_callback; | |
144 | static int callbacks_initialized = 0; | |
145 | ||
146 | /* Initialize gdb_callback. */ | |
147 | ||
148 | static void | |
fba45db2 | 149 | init_callbacks (void) |
c906108c | 150 | { |
c5aa993b | 151 | if (!callbacks_initialized) |
c906108c SS |
152 | { |
153 | gdb_callback = default_callback; | |
154 | gdb_callback.init (&gdb_callback); | |
155 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
156 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
157 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
158 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
159 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
160 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
161 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
162 | gdb_callback.error = gdb_os_error; | |
163 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
164 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
165 | callbacks_initialized = 1; | |
166 | } | |
167 | } | |
168 | ||
169 | /* Release callbacks (free resources used by them). */ | |
170 | ||
171 | static void | |
fba45db2 | 172 | end_callbacks (void) |
c906108c SS |
173 | { |
174 | if (callbacks_initialized) | |
175 | { | |
176 | gdb_callback.shutdown (&gdb_callback); | |
177 | callbacks_initialized = 0; | |
178 | } | |
179 | } | |
180 | ||
181 | /* GDB version of os_write_stdout callback. */ | |
182 | ||
c5aa993b | 183 | static int |
fba45db2 | 184 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
185 | { |
186 | int i; | |
187 | char b[2]; | |
188 | ||
d9fcf2fb | 189 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
190 | return len; |
191 | } | |
192 | ||
193 | /* GDB version of os_flush_stdout callback. */ | |
194 | ||
195 | static void | |
fba45db2 | 196 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 197 | { |
4ce44c66 | 198 | gdb_flush (gdb_stdtarg); |
c906108c SS |
199 | } |
200 | ||
201 | /* GDB version of os_write_stderr callback. */ | |
202 | ||
c5aa993b | 203 | static int |
fba45db2 | 204 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
205 | { |
206 | int i; | |
207 | char b[2]; | |
208 | ||
c5aa993b | 209 | for (i = 0; i < len; i++) |
c906108c SS |
210 | { |
211 | b[0] = buf[i]; | |
212 | b[1] = 0; | |
22e8e3c7 | 213 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
214 | } |
215 | return len; | |
216 | } | |
217 | ||
218 | /* GDB version of os_flush_stderr callback. */ | |
219 | ||
220 | static void | |
fba45db2 | 221 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 222 | { |
22e8e3c7 | 223 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
224 | } |
225 | ||
226 | /* GDB version of printf_filtered callback. */ | |
227 | ||
c906108c | 228 | static void |
c5aa993b | 229 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
230 | { |
231 | va_list args; | |
c906108c | 232 | va_start (args, format); |
c906108c SS |
233 | |
234 | vfprintf_filtered (gdb_stdout, format, args); | |
235 | ||
236 | va_end (args); | |
237 | } | |
238 | ||
239 | /* GDB version of error vprintf_filtered. */ | |
240 | ||
c906108c | 241 | static void |
c5aa993b | 242 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
243 | { |
244 | vfprintf_filtered (gdb_stdout, format, ap); | |
245 | } | |
246 | ||
247 | /* GDB version of error evprintf_filtered. */ | |
248 | ||
c906108c | 249 | static void |
c5aa993b | 250 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
251 | { |
252 | vfprintf_filtered (gdb_stderr, format, ap); | |
253 | } | |
254 | ||
255 | /* GDB version of error callback. */ | |
256 | ||
c906108c | 257 | static void |
c5aa993b | 258 | gdb_os_error (host_callback * p, const char *format,...) |
c906108c | 259 | { |
9a4105ab AC |
260 | if (deprecated_error_hook) |
261 | (*deprecated_error_hook) (); | |
c5aa993b | 262 | else |
c906108c SS |
263 | { |
264 | va_list args; | |
c906108c | 265 | va_start (args, format); |
4ce44c66 | 266 | verror (format, args); |
c906108c | 267 | va_end (args); |
c906108c SS |
268 | } |
269 | } | |
270 | ||
8238d0bf | 271 | int |
e7faf938 | 272 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
273 | { |
274 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 275 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
276 | return regnum; |
277 | } | |
278 | ||
c906108c | 279 | static void |
56be3814 | 280 | gdbsim_fetch_register (struct regcache *regcache, int regno) |
c906108c | 281 | { |
40a6adc1 | 282 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c5aa993b | 283 | if (regno == -1) |
c906108c | 284 | { |
40a6adc1 | 285 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
56be3814 | 286 | gdbsim_fetch_register (regcache, regno); |
8238d0bf | 287 | return; |
c906108c | 288 | } |
8238d0bf | 289 | |
40a6adc1 | 290 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 291 | { |
8238d0bf AC |
292 | case LEGACY_SIM_REGNO_IGNORE: |
293 | break; | |
294 | case SIM_REGNO_DOES_NOT_EXIST: | |
295 | { | |
296 | /* For moment treat a `does not exist' register the same way | |
297 | as an ``unavailable'' register. */ | |
d9d9c31f | 298 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 299 | int nr_bytes; |
d9d9c31f | 300 | memset (buf, 0, MAX_REGISTER_SIZE); |
56be3814 | 301 | regcache_raw_supply (regcache, regno, buf); |
8238d0bf AC |
302 | break; |
303 | } | |
56be3814 | 304 | |
8238d0bf AC |
305 | default: |
306 | { | |
307 | static int warn_user = 1; | |
d9d9c31f | 308 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 309 | int nr_bytes; |
40a6adc1 | 310 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
d9d9c31f | 311 | memset (buf, 0, MAX_REGISTER_SIZE); |
d4f3574e | 312 | nr_bytes = sim_fetch_register (gdbsim_desc, |
474c1661 | 313 | gdbarch_register_sim_regno |
40a6adc1 | 314 | (gdbarch, regno), |
474c1661 | 315 | buf, |
40a6adc1 MD |
316 | register_size (gdbarch, regno)); |
317 | if (nr_bytes > 0 | |
318 | && nr_bytes != register_size (gdbarch, regno) && warn_user) | |
8238d0bf AC |
319 | { |
320 | fprintf_unfiltered (gdb_stderr, | |
321 | "Size of register %s (%d/%d) incorrect (%d instead of %d))", | |
40a6adc1 | 322 | gdbarch_register_name (gdbarch, regno), |
474c1661 UW |
323 | regno, |
324 | gdbarch_register_sim_regno | |
40a6adc1 MD |
325 | (gdbarch, regno), |
326 | nr_bytes, register_size (gdbarch, regno)); | |
8238d0bf AC |
327 | warn_user = 0; |
328 | } | |
329 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 330 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
331 | which registers are fetchable. */ |
332 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
333 | think to return the register size. Just assume all is ok. */ | |
56be3814 | 334 | regcache_raw_supply (regcache, regno, buf); |
ea35711c | 335 | if (remote_debug) |
8238d0bf AC |
336 | { |
337 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
338 | /* FIXME: We could print something more intelligible. */ | |
40a6adc1 | 339 | dump_mem (buf, register_size (gdbarch, regno)); |
8238d0bf AC |
340 | } |
341 | break; | |
342 | } | |
c906108c SS |
343 | } |
344 | } | |
345 | ||
346 | ||
347 | static void | |
56be3814 | 348 | gdbsim_store_register (struct regcache *regcache, int regno) |
c906108c | 349 | { |
40a6adc1 | 350 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c5aa993b | 351 | if (regno == -1) |
c906108c | 352 | { |
40a6adc1 | 353 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
56be3814 | 354 | gdbsim_store_register (regcache, regno); |
8238d0bf | 355 | return; |
c906108c | 356 | } |
40a6adc1 | 357 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 358 | { |
123a958e | 359 | char tmp[MAX_REGISTER_SIZE]; |
c906108c | 360 | int nr_bytes; |
56be3814 | 361 | regcache_cooked_read (regcache, regno, tmp); |
d4f3574e | 362 | nr_bytes = sim_store_register (gdbsim_desc, |
474c1661 | 363 | gdbarch_register_sim_regno |
40a6adc1 MD |
364 | (gdbarch, regno), |
365 | tmp, register_size (gdbarch, regno)); | |
366 | if (nr_bytes > 0 && nr_bytes != register_size (gdbarch, regno)) | |
8e65ff28 | 367 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 368 | _("Register size different to expected")); |
8238d0bf | 369 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' |
278a7cf7 | 370 | indicating that GDB and the SIM have different ideas about |
8238d0bf | 371 | which registers are fetchable. */ |
ea35711c | 372 | if (remote_debug) |
c906108c SS |
373 | { |
374 | printf_filtered ("gdbsim_store_register: %d", regno); | |
375 | /* FIXME: We could print something more intelligible. */ | |
40a6adc1 | 376 | dump_mem (tmp, register_size (gdbarch, regno)); |
c906108c SS |
377 | } |
378 | } | |
379 | } | |
380 | ||
381 | /* Kill the running program. This may involve closing any open files | |
382 | and releasing other resources acquired by the simulated program. */ | |
383 | ||
384 | static void | |
fba45db2 | 385 | gdbsim_kill (void) |
c906108c | 386 | { |
ea35711c | 387 | if (remote_debug) |
c906108c SS |
388 | printf_filtered ("gdbsim_kill\n"); |
389 | ||
390 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f DJ |
391 | not running. Mourning it is enough. */ |
392 | target_mourn_inferior (); | |
c906108c SS |
393 | } |
394 | ||
395 | /* Load an executable file into the target process. This is expected to | |
396 | not only bring new code into the target process, but also to update | |
397 | GDB's symbol tables to match. */ | |
398 | ||
399 | static void | |
1986bccd | 400 | gdbsim_load (char *args, int fromtty) |
c906108c | 401 | { |
1986bccd AS |
402 | char **argv = buildargv (args); |
403 | char *prog; | |
404 | ||
405 | if (argv == NULL) | |
406 | nomem (0); | |
407 | ||
408 | make_cleanup_freeargv (argv); | |
409 | ||
410 | prog = tilde_expand (argv[0]); | |
411 | ||
412 | if (argv[1] != NULL) | |
413 | error (_("GDB sim does not yet support a load offset.")); | |
414 | ||
ea35711c | 415 | if (remote_debug) |
c906108c SS |
416 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); |
417 | ||
c906108c SS |
418 | /* FIXME: We will print two messages on error. |
419 | Need error to either not print anything if passed NULL or need | |
420 | another routine that doesn't take any arguments. */ | |
421 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
8a3fe4f8 | 422 | error (_("unable to load program")); |
c906108c SS |
423 | |
424 | /* FIXME: If a load command should reset the targets registers then | |
425 | a call to sim_create_inferior() should go here. */ | |
426 | ||
427 | program_loaded = 1; | |
428 | } | |
429 | ||
430 | ||
39f77062 | 431 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
432 | EXEC_FILE is the file to run. |
433 | ARGS is a string containing the arguments to the program. | |
434 | ENV is the environment vector to pass. Errors reported with error(). | |
435 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
436 | /* This is called not only when we first attach, but also when the | |
437 | user types "run" after having attached. */ | |
438 | ||
439 | static void | |
c27cda74 | 440 | gdbsim_create_inferior (char *exec_file, char *args, char **env, int from_tty) |
c906108c SS |
441 | { |
442 | int len; | |
c5aa993b | 443 | char *arg_buf, **argv; |
c906108c SS |
444 | |
445 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 446 | warning (_("No executable file specified.")); |
c5aa993b | 447 | if (!program_loaded) |
8a3fe4f8 | 448 | warning (_("No program loaded.")); |
c906108c | 449 | |
ea35711c | 450 | if (remote_debug) |
c906108c | 451 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", |
c5aa993b | 452 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
453 | args); |
454 | ||
c5aa993b | 455 | gdbsim_kill (); |
c906108c SS |
456 | remove_breakpoints (); |
457 | init_wait_for_inferior (); | |
458 | ||
459 | if (exec_file != NULL) | |
460 | { | |
c5aa993b | 461 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
462 | arg_buf = (char *) alloca (len); |
463 | arg_buf[0] = '\0'; | |
464 | strcat (arg_buf, exec_file); | |
465 | strcat (arg_buf, " "); | |
466 | strcat (arg_buf, args); | |
467 | argv = buildargv (arg_buf); | |
7a292a7a | 468 | make_cleanup_freeargv (argv); |
c906108c SS |
469 | } |
470 | else | |
471 | argv = NULL; | |
472 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
473 | ||
39f77062 | 474 | inferior_ptid = pid_to_ptid (42); |
52bb452f | 475 | target_mark_running (&gdbsim_ops); |
c5aa993b | 476 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
477 | |
478 | clear_proceed_status (); | |
c906108c SS |
479 | } |
480 | ||
481 | /* The open routine takes the rest of the parameters from the command, | |
482 | and (if successful) pushes a new target onto the stack. | |
483 | Targets should supply this routine, if only to provide an error message. */ | |
484 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
485 | ||
486 | static void | |
fba45db2 | 487 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
488 | { |
489 | int len; | |
490 | char *arg_buf; | |
491 | char **argv; | |
492 | ||
ea35711c | 493 | if (remote_debug) |
c906108c SS |
494 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
495 | ||
496 | /* Remove current simulator if one exists. Only do this if the simulator | |
497 | has been opened because sim_close requires it. | |
498 | This is important because the call to push_target below will cause | |
499 | sim_close to be called if the simulator is already open, but push_target | |
500 | is called after sim_open! We can't move the call to push_target before | |
501 | the call to sim_open because sim_open may invoke `error'. */ | |
502 | if (gdbsim_desc != NULL) | |
503 | unpush_target (&gdbsim_ops); | |
504 | ||
c5aa993b | 505 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
506 | + strlen (" -E little") |
507 | + strlen (" --architecture=xxxxxxxxxx") | |
508 | + (args ? strlen (args) : 0) | |
c5aa993b | 509 | + 50) /* slack */ ; |
c906108c | 510 | arg_buf = (char *) alloca (len); |
c5aa993b | 511 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df DJ |
512 | /* Specify the byte order for the target when it is explicitly |
513 | specified by the user (not auto detected). */ | |
514 | switch (selected_byte_order ()) | |
c906108c | 515 | { |
a8cf2722 AC |
516 | case BFD_ENDIAN_BIG: |
517 | strcat (arg_buf, " -E big"); | |
518 | break; | |
519 | case BFD_ENDIAN_LITTLE: | |
520 | strcat (arg_buf, " -E little"); | |
521 | break; | |
522 | case BFD_ENDIAN_UNKNOWN: | |
523 | break; | |
c906108c SS |
524 | } |
525 | /* Specify the architecture of the target when it has been | |
526 | explicitly specified */ | |
a8cf2722 | 527 | if (selected_architecture_name () != NULL) |
c906108c SS |
528 | { |
529 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 530 | strcat (arg_buf, selected_architecture_name ()); |
c906108c SS |
531 | } |
532 | /* finally, any explicit args */ | |
533 | if (args) | |
534 | { | |
c5aa993b | 535 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
536 | strcat (arg_buf, args); |
537 | } | |
538 | argv = buildargv (arg_buf); | |
539 | if (argv == NULL) | |
8a3fe4f8 | 540 | error (_("Insufficient memory available to allocate simulator arg list.")); |
7a292a7a | 541 | make_cleanup_freeargv (argv); |
c906108c SS |
542 | |
543 | init_callbacks (); | |
544 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
545 | ||
546 | if (gdbsim_desc == 0) | |
8a3fe4f8 | 547 | error (_("unable to create simulator instance")); |
c906108c SS |
548 | |
549 | push_target (&gdbsim_ops); | |
c906108c | 550 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
551 | |
552 | /* There's nothing running after "target sim" or "load"; not until | |
553 | "run". */ | |
554 | inferior_ptid = null_ptid; | |
555 | target_mark_exited (&gdbsim_ops); | |
c906108c SS |
556 | } |
557 | ||
558 | /* Does whatever cleanup is required for a target that we are no longer | |
559 | going to be calling. Argument says whether we are quitting gdb and | |
560 | should not get hung in case of errors, or whether we want a clean | |
561 | termination even if it takes a while. This routine is automatically | |
562 | always called just before a routine is popped off the target stack. | |
563 | Closing file descriptors and freeing memory are typical things it should | |
564 | do. */ | |
565 | /* Close out all files and local state before this target loses control. */ | |
566 | ||
567 | static void | |
fba45db2 | 568 | gdbsim_close (int quitting) |
c906108c | 569 | { |
ea35711c | 570 | if (remote_debug) |
c906108c SS |
571 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); |
572 | ||
573 | program_loaded = 0; | |
574 | ||
575 | if (gdbsim_desc != NULL) | |
576 | { | |
577 | sim_close (gdbsim_desc, quitting); | |
578 | gdbsim_desc = NULL; | |
579 | } | |
580 | ||
581 | end_callbacks (); | |
75660bc0 | 582 | generic_mourn_inferior (); |
c906108c SS |
583 | } |
584 | ||
585 | /* Takes a program previously attached to and detaches it. | |
586 | The program may resume execution (some targets do, some don't) and will | |
587 | no longer stop on signals, etc. We better not have left any breakpoints | |
588 | in the program or it'll die when it hits one. ARGS is arguments | |
589 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
590 | says whether to be verbose or not. */ | |
591 | /* Terminate the open connection to the remote debugger. | |
592 | Use this when you want to detach and do something else with your gdb. */ | |
593 | ||
594 | static void | |
fba45db2 | 595 | gdbsim_detach (char *args, int from_tty) |
c906108c | 596 | { |
ea35711c | 597 | if (remote_debug) |
c906108c SS |
598 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); |
599 | ||
600 | pop_target (); /* calls gdbsim_close to do the real work */ | |
601 | if (from_tty) | |
602 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
603 | } | |
c5aa993b | 604 | |
c906108c SS |
605 | /* Resume execution of the target process. STEP says whether to single-step |
606 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
607 | to the target, or zero for no signal. */ | |
608 | ||
609 | static enum target_signal resume_siggnal; | |
610 | static int resume_step; | |
611 | ||
612 | static void | |
39f77062 | 613 | gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c | 614 | { |
39f77062 | 615 | if (PIDGET (inferior_ptid) != 42) |
8a3fe4f8 | 616 | error (_("The program is not being run.")); |
c906108c | 617 | |
ea35711c | 618 | if (remote_debug) |
c906108c SS |
619 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); |
620 | ||
621 | resume_siggnal = siggnal; | |
622 | resume_step = step; | |
623 | } | |
624 | ||
625 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 626 | |
c906108c SS |
627 | The simulator shall ensure that the stop request is eventually |
628 | delivered to the simulator. If the call is made while the | |
629 | simulator is not running then the stop request is processed when | |
630 | the simulator is next resumed. | |
631 | ||
632 | For simulators that do not support this operation, just abort */ | |
633 | ||
634 | static void | |
fba45db2 | 635 | gdbsim_stop (void) |
c906108c | 636 | { |
c5aa993b | 637 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
638 | { |
639 | quit (); | |
640 | } | |
641 | } | |
642 | ||
643 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 644 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
645 | |
646 | static int | |
fba45db2 | 647 | gdb_os_poll_quit (host_callback *p) |
c906108c | 648 | { |
98bbd631 AC |
649 | if (deprecated_ui_loop_hook != NULL) |
650 | deprecated_ui_loop_hook (0); | |
7a292a7a | 651 | |
c5aa993b | 652 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 653 | { |
c5aa993b | 654 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
655 | return 1; |
656 | } | |
657 | else if (immediate_quit) | |
658 | { | |
659 | return 1; | |
660 | } | |
661 | return 0; | |
662 | } | |
663 | ||
664 | /* Wait for inferior process to do something. Return pid of child, | |
665 | or -1 in case of error; store status through argument pointer STATUS, | |
666 | just as `wait' would. */ | |
667 | ||
668 | static void | |
fba45db2 | 669 | gdbsim_cntrl_c (int signo) |
c906108c SS |
670 | { |
671 | gdbsim_stop (); | |
672 | } | |
673 | ||
39f77062 KB |
674 | static ptid_t |
675 | gdbsim_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
676 | { |
677 | static RETSIGTYPE (*prev_sigint) (); | |
678 | int sigrc = 0; | |
679 | enum sim_stop reason = sim_running; | |
680 | ||
ea35711c | 681 | if (remote_debug) |
c906108c SS |
682 | printf_filtered ("gdbsim_wait\n"); |
683 | ||
684 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
685 | { | |
686 | struct sigaction sa, osa; | |
687 | sa.sa_handler = gdbsim_cntrl_c; | |
688 | sigemptyset (&sa.sa_mask); | |
689 | sa.sa_flags = 0; | |
690 | sigaction (SIGINT, &sa, &osa); | |
691 | prev_sigint = osa.sa_handler; | |
692 | } | |
693 | #else | |
694 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
695 | #endif | |
aba6488e | 696 | sim_resume (gdbsim_desc, resume_step, resume_siggnal); |
c906108c SS |
697 | signal (SIGINT, prev_sigint); |
698 | resume_step = 0; | |
699 | ||
700 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
701 | ||
702 | switch (reason) | |
703 | { | |
704 | case sim_exited: | |
705 | status->kind = TARGET_WAITKIND_EXITED; | |
706 | status->value.integer = sigrc; | |
707 | break; | |
708 | case sim_stopped: | |
709 | switch (sigrc) | |
710 | { | |
aba6488e | 711 | case TARGET_SIGNAL_ABRT: |
c906108c SS |
712 | quit (); |
713 | break; | |
aba6488e MM |
714 | case TARGET_SIGNAL_INT: |
715 | case TARGET_SIGNAL_TRAP: | |
c906108c SS |
716 | default: |
717 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 718 | status->value.sig = sigrc; |
c906108c SS |
719 | break; |
720 | } | |
721 | break; | |
722 | case sim_signalled: | |
723 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 724 | status->value.sig = sigrc; |
c906108c SS |
725 | break; |
726 | case sim_running: | |
727 | case sim_polling: | |
728 | /* FIXME: Is this correct? */ | |
729 | break; | |
730 | } | |
731 | ||
39f77062 | 732 | return inferior_ptid; |
c906108c SS |
733 | } |
734 | ||
735 | /* Get ready to modify the registers array. On machines which store | |
736 | individual registers, this doesn't need to do anything. On machines | |
737 | which store all the registers in one fell swoop, this makes sure | |
738 | that registers contains all the registers from the program being | |
739 | debugged. */ | |
740 | ||
741 | static void | |
316f2060 | 742 | gdbsim_prepare_to_store (struct regcache *regcache) |
c906108c SS |
743 | { |
744 | /* Do nothing, since we can store individual regs */ | |
745 | } | |
746 | ||
d93bce06 KB |
747 | /* Transfer LEN bytes between GDB address MYADDR and target address |
748 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
749 | otherwise transfer them from the target. TARGET is unused. | |
750 | ||
751 | Returns the number of bytes transferred. */ | |
752 | ||
c906108c | 753 | static int |
8d7337bf | 754 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
0a65a603 AC |
755 | int write, struct mem_attrib *attrib, |
756 | struct target_ops *target) | |
c906108c | 757 | { |
52bb452f DJ |
758 | /* If no program is running yet, then ignore the simulator for |
759 | memory. Pass the request down to the next target, hopefully | |
760 | an exec file. */ | |
761 | if (!target_has_execution) | |
762 | return 0; | |
763 | ||
c5aa993b | 764 | if (!program_loaded) |
8a3fe4f8 | 765 | error (_("No program loaded.")); |
c906108c | 766 | |
ea35711c | 767 | if (remote_debug) |
c906108c | 768 | { |
d4f3574e SS |
769 | /* FIXME: Send to something other than STDOUT? */ |
770 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
771 | gdb_print_host_address (myaddr, gdb_stdout); | |
772 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
773 | paddr_nz (memaddr), len, write); | |
ea35711c | 774 | if (remote_debug && write) |
c5aa993b | 775 | dump_mem (myaddr, len); |
c906108c SS |
776 | } |
777 | ||
778 | if (write) | |
779 | { | |
780 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
781 | } | |
c5aa993b | 782 | else |
c906108c SS |
783 | { |
784 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
ea35711c | 785 | if (remote_debug && len > 0) |
c5aa993b JM |
786 | dump_mem (myaddr, len); |
787 | } | |
c906108c SS |
788 | return len; |
789 | } | |
790 | ||
791 | static void | |
fba45db2 | 792 | gdbsim_files_info (struct target_ops *target) |
c906108c SS |
793 | { |
794 | char *file = "nothing"; | |
795 | ||
796 | if (exec_bfd) | |
797 | file = bfd_get_filename (exec_bfd); | |
798 | ||
ea35711c | 799 | if (remote_debug) |
c906108c SS |
800 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); |
801 | ||
802 | if (exec_bfd) | |
803 | { | |
804 | printf_filtered ("\tAttached to %s running program %s\n", | |
805 | target_shortname, file); | |
806 | sim_info (gdbsim_desc, 0); | |
807 | } | |
808 | } | |
809 | ||
810 | /* Clear the simulator's notion of what the break points are. */ | |
811 | ||
812 | static void | |
fba45db2 | 813 | gdbsim_mourn_inferior (void) |
c5aa993b | 814 | { |
ea35711c | 815 | if (remote_debug) |
c906108c SS |
816 | printf_filtered ("gdbsim_mourn_inferior:\n"); |
817 | ||
818 | remove_breakpoints (); | |
52bb452f | 819 | target_mark_exited (&gdbsim_ops); |
c906108c SS |
820 | generic_mourn_inferior (); |
821 | } | |
822 | ||
c906108c SS |
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 | ||
8a3fe4f8 | 842 | error (_("Not connected to the simulator target")); |
c906108c SS |
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; | |
c8e73a31 | 870 | gdbsim_ops.deprecated_xfer_memory = gdbsim_xfer_inferior_memory; |
c5aa993b | 871 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
872 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
873 | gdbsim_ops.to_remove_breakpoint = memory_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 | ||
24ec834b | 898 | add_com ("sim", class_obscure, simulator_command, |
1bedd215 | 899 | _("Send a command to the simulator.")); |
c906108c | 900 | } |