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, |
0fb0cc75 | 4 | 2004, 2005, 2006, 2007, 2008, 2009 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" |
9de2bdd7 | 44 | #include "gdbthread.h" |
c906108c SS |
45 | |
46 | /* Prototypes */ | |
47 | ||
a14ed312 | 48 | extern void _initialize_remote_sim (void); |
392a587b | 49 | |
a14ed312 | 50 | static void dump_mem (char *buf, int len); |
c906108c | 51 | |
a14ed312 | 52 | static void init_callbacks (void); |
c906108c | 53 | |
a14ed312 | 54 | static void end_callbacks (void); |
c906108c | 55 | |
a14ed312 | 56 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 57 | |
a14ed312 | 58 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 59 | |
a14ed312 | 60 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 61 | |
a14ed312 | 62 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 63 | |
a14ed312 | 64 | static int gdb_os_poll_quit (host_callback *); |
c906108c SS |
65 | |
66 | /* printf_filtered is depreciated */ | |
a14ed312 | 67 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 68 | |
a14ed312 | 69 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 70 | |
a14ed312 | 71 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 72 | |
72ee8797 | 73 | static void gdb_os_error (host_callback *, const char *, ...) ATTR_NORETURN; |
c906108c | 74 | |
a14ed312 | 75 | static void gdbsim_kill (void); |
c906108c | 76 | |
a14ed312 | 77 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 78 | |
a14ed312 | 79 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 80 | |
a14ed312 | 81 | static void gdbsim_close (int quitting); |
c906108c | 82 | |
136d6dae | 83 | static void gdbsim_detach (struct target_ops *ops, char *args, int from_tty); |
c906108c | 84 | |
39f77062 | 85 | static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal); |
c906108c | 86 | |
316f2060 | 87 | static void gdbsim_prepare_to_store (struct regcache *regcache); |
c906108c | 88 | |
a14ed312 | 89 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 90 | |
3c8b2eda | 91 | static void gdbsim_mourn_inferior (struct target_ops *target); |
c906108c | 92 | |
f9c72d52 | 93 | static void gdbsim_stop (ptid_t ptid); |
c906108c | 94 | |
a14ed312 | 95 | void simulator_command (char *args, int from_tty); |
c906108c SS |
96 | |
97 | /* Naming convention: | |
98 | ||
99 | sim_* are the interface to the simulator (see remote-sim.h). | |
100 | gdbsim_* are stuff which is internal to gdb. */ | |
101 | ||
102 | /* Forward data declarations */ | |
103 | extern struct target_ops gdbsim_ops; | |
104 | ||
105 | static int program_loaded = 0; | |
106 | ||
107 | /* We must keep track of whether the simulator has been opened or not because | |
108 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
109 | this. We also need to record the result of sim_open so we can pass it | |
110 | back to the other sim_foo routines. */ | |
111 | static SIM_DESC gdbsim_desc = 0; | |
112 | ||
9de2bdd7 PA |
113 | /* This is the ptid we use while we're connected to the simulator. |
114 | Its value is arbitrary, as the simulator target don't have a notion | |
115 | or processes or threads, but we need something non-null to place in | |
116 | inferior_ptid. */ | |
117 | static ptid_t remote_sim_ptid; | |
118 | ||
c906108c | 119 | static void |
fba45db2 | 120 | dump_mem (char *buf, int len) |
c906108c SS |
121 | { |
122 | if (len <= 8) | |
123 | { | |
124 | if (len == 8 || len == 4) | |
125 | { | |
126 | long l[2]; | |
127 | memcpy (l, buf, len); | |
d4f3574e | 128 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
129 | if (len == 8) |
130 | printf_filtered (" 0x%lx", l[1]); | |
131 | printf_filtered ("\n"); | |
c906108c SS |
132 | } |
133 | else | |
134 | { | |
135 | int i; | |
136 | printf_filtered ("\t"); | |
137 | for (i = 0; i < len; i++) | |
138 | printf_filtered ("0x%x ", buf[i]); | |
139 | printf_filtered ("\n"); | |
140 | } | |
141 | } | |
142 | } | |
143 | ||
144 | static host_callback gdb_callback; | |
145 | static int callbacks_initialized = 0; | |
146 | ||
147 | /* Initialize gdb_callback. */ | |
148 | ||
149 | static void | |
fba45db2 | 150 | init_callbacks (void) |
c906108c | 151 | { |
c5aa993b | 152 | if (!callbacks_initialized) |
c906108c SS |
153 | { |
154 | gdb_callback = default_callback; | |
155 | gdb_callback.init (&gdb_callback); | |
156 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
157 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
158 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
159 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
160 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
161 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
162 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
163 | gdb_callback.error = gdb_os_error; | |
164 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
165 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
166 | callbacks_initialized = 1; | |
167 | } | |
168 | } | |
169 | ||
170 | /* Release callbacks (free resources used by them). */ | |
171 | ||
172 | static void | |
fba45db2 | 173 | end_callbacks (void) |
c906108c SS |
174 | { |
175 | if (callbacks_initialized) | |
176 | { | |
177 | gdb_callback.shutdown (&gdb_callback); | |
178 | callbacks_initialized = 0; | |
179 | } | |
180 | } | |
181 | ||
182 | /* GDB version of os_write_stdout callback. */ | |
183 | ||
c5aa993b | 184 | static int |
fba45db2 | 185 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
186 | { |
187 | int i; | |
188 | char b[2]; | |
189 | ||
d9fcf2fb | 190 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
191 | return len; |
192 | } | |
193 | ||
194 | /* GDB version of os_flush_stdout callback. */ | |
195 | ||
196 | static void | |
fba45db2 | 197 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 198 | { |
4ce44c66 | 199 | gdb_flush (gdb_stdtarg); |
c906108c SS |
200 | } |
201 | ||
202 | /* GDB version of os_write_stderr callback. */ | |
203 | ||
c5aa993b | 204 | static int |
fba45db2 | 205 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
206 | { |
207 | int i; | |
208 | char b[2]; | |
209 | ||
c5aa993b | 210 | for (i = 0; i < len; i++) |
c906108c SS |
211 | { |
212 | b[0] = buf[i]; | |
213 | b[1] = 0; | |
22e8e3c7 | 214 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
215 | } |
216 | return len; | |
217 | } | |
218 | ||
219 | /* GDB version of os_flush_stderr callback. */ | |
220 | ||
221 | static void | |
fba45db2 | 222 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 223 | { |
22e8e3c7 | 224 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
225 | } |
226 | ||
227 | /* GDB version of printf_filtered callback. */ | |
228 | ||
c906108c | 229 | static void |
c5aa993b | 230 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
231 | { |
232 | va_list args; | |
c906108c | 233 | va_start (args, format); |
c906108c SS |
234 | |
235 | vfprintf_filtered (gdb_stdout, format, args); | |
236 | ||
237 | va_end (args); | |
238 | } | |
239 | ||
240 | /* GDB version of error vprintf_filtered. */ | |
241 | ||
c906108c | 242 | static void |
c5aa993b | 243 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
244 | { |
245 | vfprintf_filtered (gdb_stdout, format, ap); | |
246 | } | |
247 | ||
248 | /* GDB version of error evprintf_filtered. */ | |
249 | ||
c906108c | 250 | static void |
c5aa993b | 251 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
252 | { |
253 | vfprintf_filtered (gdb_stderr, format, ap); | |
254 | } | |
255 | ||
256 | /* GDB version of error callback. */ | |
257 | ||
c906108c | 258 | static void |
58d4abe1 | 259 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 260 | { |
58d4abe1 PA |
261 | va_list args; |
262 | va_start (args, format); | |
263 | verror (format, args); | |
264 | va_end (args); | |
c906108c SS |
265 | } |
266 | ||
8238d0bf | 267 | int |
e7faf938 | 268 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
269 | { |
270 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 271 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
272 | return regnum; |
273 | } | |
274 | ||
c906108c | 275 | static void |
28439f5e PA |
276 | gdbsim_fetch_register (struct target_ops *ops, |
277 | struct regcache *regcache, int regno) | |
c906108c | 278 | { |
40a6adc1 | 279 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c5aa993b | 280 | if (regno == -1) |
c906108c | 281 | { |
40a6adc1 | 282 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 283 | gdbsim_fetch_register (ops, regcache, regno); |
8238d0bf | 284 | return; |
c906108c | 285 | } |
8238d0bf | 286 | |
40a6adc1 | 287 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 288 | { |
8238d0bf AC |
289 | case LEGACY_SIM_REGNO_IGNORE: |
290 | break; | |
291 | case SIM_REGNO_DOES_NOT_EXIST: | |
292 | { | |
293 | /* For moment treat a `does not exist' register the same way | |
294 | as an ``unavailable'' register. */ | |
d9d9c31f | 295 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 296 | int nr_bytes; |
d9d9c31f | 297 | memset (buf, 0, MAX_REGISTER_SIZE); |
56be3814 | 298 | regcache_raw_supply (regcache, regno, buf); |
8238d0bf AC |
299 | break; |
300 | } | |
56be3814 | 301 | |
8238d0bf AC |
302 | default: |
303 | { | |
304 | static int warn_user = 1; | |
d9d9c31f | 305 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 306 | int nr_bytes; |
40a6adc1 | 307 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
d9d9c31f | 308 | memset (buf, 0, MAX_REGISTER_SIZE); |
d4f3574e | 309 | nr_bytes = sim_fetch_register (gdbsim_desc, |
474c1661 | 310 | gdbarch_register_sim_regno |
40a6adc1 | 311 | (gdbarch, regno), |
474c1661 | 312 | buf, |
40a6adc1 MD |
313 | register_size (gdbarch, regno)); |
314 | if (nr_bytes > 0 | |
315 | && nr_bytes != register_size (gdbarch, regno) && warn_user) | |
8238d0bf AC |
316 | { |
317 | fprintf_unfiltered (gdb_stderr, | |
318 | "Size of register %s (%d/%d) incorrect (%d instead of %d))", | |
40a6adc1 | 319 | gdbarch_register_name (gdbarch, regno), |
474c1661 UW |
320 | regno, |
321 | gdbarch_register_sim_regno | |
40a6adc1 MD |
322 | (gdbarch, regno), |
323 | nr_bytes, register_size (gdbarch, regno)); | |
8238d0bf AC |
324 | warn_user = 0; |
325 | } | |
326 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 327 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
328 | which registers are fetchable. */ |
329 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
330 | think to return the register size. Just assume all is ok. */ | |
56be3814 | 331 | regcache_raw_supply (regcache, regno, buf); |
ea35711c | 332 | if (remote_debug) |
8238d0bf AC |
333 | { |
334 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
335 | /* FIXME: We could print something more intelligible. */ | |
40a6adc1 | 336 | dump_mem (buf, register_size (gdbarch, regno)); |
8238d0bf AC |
337 | } |
338 | break; | |
339 | } | |
c906108c SS |
340 | } |
341 | } | |
342 | ||
343 | ||
344 | static void | |
28439f5e PA |
345 | gdbsim_store_register (struct target_ops *ops, |
346 | struct regcache *regcache, int regno) | |
c906108c | 347 | { |
40a6adc1 | 348 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c5aa993b | 349 | if (regno == -1) |
c906108c | 350 | { |
40a6adc1 | 351 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 352 | gdbsim_store_register (ops, regcache, regno); |
8238d0bf | 353 | return; |
c906108c | 354 | } |
40a6adc1 | 355 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 356 | { |
123a958e | 357 | char tmp[MAX_REGISTER_SIZE]; |
c906108c | 358 | int nr_bytes; |
56be3814 | 359 | regcache_cooked_read (regcache, regno, tmp); |
d4f3574e | 360 | nr_bytes = sim_store_register (gdbsim_desc, |
474c1661 | 361 | gdbarch_register_sim_regno |
40a6adc1 MD |
362 | (gdbarch, regno), |
363 | tmp, register_size (gdbarch, regno)); | |
364 | if (nr_bytes > 0 && nr_bytes != register_size (gdbarch, regno)) | |
8e65ff28 | 365 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 366 | _("Register size different to expected")); |
8238d0bf | 367 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' |
278a7cf7 | 368 | indicating that GDB and the SIM have different ideas about |
8238d0bf | 369 | which registers are fetchable. */ |
ea35711c | 370 | if (remote_debug) |
c906108c SS |
371 | { |
372 | printf_filtered ("gdbsim_store_register: %d", regno); | |
373 | /* FIXME: We could print something more intelligible. */ | |
40a6adc1 | 374 | dump_mem (tmp, register_size (gdbarch, regno)); |
c906108c SS |
375 | } |
376 | } | |
377 | } | |
378 | ||
379 | /* Kill the running program. This may involve closing any open files | |
380 | and releasing other resources acquired by the simulated program. */ | |
381 | ||
382 | static void | |
fba45db2 | 383 | gdbsim_kill (void) |
c906108c | 384 | { |
ea35711c | 385 | if (remote_debug) |
c906108c SS |
386 | printf_filtered ("gdbsim_kill\n"); |
387 | ||
388 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f DJ |
389 | not running. Mourning it is enough. */ |
390 | target_mourn_inferior (); | |
c906108c SS |
391 | } |
392 | ||
393 | /* Load an executable file into the target process. This is expected to | |
394 | not only bring new code into the target process, but also to update | |
395 | GDB's symbol tables to match. */ | |
396 | ||
397 | static void | |
1986bccd | 398 | gdbsim_load (char *args, int fromtty) |
c906108c | 399 | { |
d1a41061 | 400 | char **argv; |
1986bccd AS |
401 | char *prog; |
402 | ||
d1a41061 PP |
403 | if (args == NULL) |
404 | error_no_arg (_("program to load")); | |
1986bccd | 405 | |
d1a41061 | 406 | argv = gdb_buildargv (args); |
1986bccd AS |
407 | make_cleanup_freeargv (argv); |
408 | ||
409 | prog = tilde_expand (argv[0]); | |
410 | ||
411 | if (argv[1] != NULL) | |
412 | error (_("GDB sim does not yet support a load offset.")); | |
413 | ||
ea35711c | 414 | if (remote_debug) |
c906108c SS |
415 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); |
416 | ||
c906108c SS |
417 | /* FIXME: We will print two messages on error. |
418 | Need error to either not print anything if passed NULL or need | |
419 | another routine that doesn't take any arguments. */ | |
420 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
8a3fe4f8 | 421 | error (_("unable to load program")); |
c906108c SS |
422 | |
423 | /* FIXME: If a load command should reset the targets registers then | |
424 | a call to sim_create_inferior() should go here. */ | |
425 | ||
426 | program_loaded = 1; | |
427 | } | |
428 | ||
429 | ||
39f77062 | 430 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
431 | EXEC_FILE is the file to run. |
432 | ARGS is a string containing the arguments to the program. | |
433 | ENV is the environment vector to pass. Errors reported with error(). | |
434 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
435 | /* This is called not only when we first attach, but also when the | |
436 | user types "run" after having attached. */ | |
437 | ||
438 | static void | |
3c8b2eda TJB |
439 | gdbsim_create_inferior (struct target_ops *target, char *exec_file, char *args, |
440 | 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 | ||
9de2bdd7 PA |
455 | if (ptid_equal (inferior_ptid, remote_sim_ptid)) |
456 | gdbsim_kill (); | |
c906108c SS |
457 | remove_breakpoints (); |
458 | init_wait_for_inferior (); | |
459 | ||
460 | if (exec_file != NULL) | |
461 | { | |
c5aa993b | 462 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
463 | arg_buf = (char *) alloca (len); |
464 | arg_buf[0] = '\0'; | |
465 | strcat (arg_buf, exec_file); | |
466 | strcat (arg_buf, " "); | |
467 | strcat (arg_buf, args); | |
d1a41061 | 468 | argv = gdb_buildargv (arg_buf); |
7a292a7a | 469 | make_cleanup_freeargv (argv); |
c906108c SS |
470 | } |
471 | else | |
472 | argv = NULL; | |
473 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
474 | ||
9de2bdd7 | 475 | inferior_ptid = remote_sim_ptid; |
6fbd21a1 | 476 | add_inferior_silent (ptid_get_pid (inferior_ptid)); |
9de2bdd7 PA |
477 | add_thread_silent (inferior_ptid); |
478 | ||
52bb452f | 479 | target_mark_running (&gdbsim_ops); |
c5aa993b | 480 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
481 | |
482 | clear_proceed_status (); | |
c906108c SS |
483 | } |
484 | ||
485 | /* The open routine takes the rest of the parameters from the command, | |
486 | and (if successful) pushes a new target onto the stack. | |
487 | Targets should supply this routine, if only to provide an error message. */ | |
488 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
489 | ||
490 | static void | |
fba45db2 | 491 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
492 | { |
493 | int len; | |
494 | char *arg_buf; | |
495 | char **argv; | |
496 | ||
ea35711c | 497 | if (remote_debug) |
c906108c SS |
498 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
499 | ||
500 | /* Remove current simulator if one exists. Only do this if the simulator | |
501 | has been opened because sim_close requires it. | |
502 | This is important because the call to push_target below will cause | |
503 | sim_close to be called if the simulator is already open, but push_target | |
504 | is called after sim_open! We can't move the call to push_target before | |
505 | the call to sim_open because sim_open may invoke `error'. */ | |
506 | if (gdbsim_desc != NULL) | |
507 | unpush_target (&gdbsim_ops); | |
508 | ||
c5aa993b | 509 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
510 | + strlen (" -E little") |
511 | + strlen (" --architecture=xxxxxxxxxx") | |
512 | + (args ? strlen (args) : 0) | |
c5aa993b | 513 | + 50) /* slack */ ; |
c906108c | 514 | arg_buf = (char *) alloca (len); |
c5aa993b | 515 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df DJ |
516 | /* Specify the byte order for the target when it is explicitly |
517 | specified by the user (not auto detected). */ | |
518 | switch (selected_byte_order ()) | |
c906108c | 519 | { |
a8cf2722 AC |
520 | case BFD_ENDIAN_BIG: |
521 | strcat (arg_buf, " -E big"); | |
522 | break; | |
523 | case BFD_ENDIAN_LITTLE: | |
524 | strcat (arg_buf, " -E little"); | |
525 | break; | |
526 | case BFD_ENDIAN_UNKNOWN: | |
527 | break; | |
c906108c SS |
528 | } |
529 | /* Specify the architecture of the target when it has been | |
530 | explicitly specified */ | |
a8cf2722 | 531 | if (selected_architecture_name () != NULL) |
c906108c SS |
532 | { |
533 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 534 | strcat (arg_buf, selected_architecture_name ()); |
c906108c SS |
535 | } |
536 | /* finally, any explicit args */ | |
537 | if (args) | |
538 | { | |
c5aa993b | 539 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
540 | strcat (arg_buf, args); |
541 | } | |
d1a41061 | 542 | argv = gdb_buildargv (arg_buf); |
7a292a7a | 543 | make_cleanup_freeargv (argv); |
c906108c SS |
544 | |
545 | init_callbacks (); | |
546 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
547 | ||
548 | if (gdbsim_desc == 0) | |
8a3fe4f8 | 549 | error (_("unable to create simulator instance")); |
c906108c SS |
550 | |
551 | push_target (&gdbsim_ops); | |
c906108c | 552 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
553 | |
554 | /* There's nothing running after "target sim" or "load"; not until | |
555 | "run". */ | |
556 | inferior_ptid = null_ptid; | |
557 | target_mark_exited (&gdbsim_ops); | |
c906108c SS |
558 | } |
559 | ||
560 | /* Does whatever cleanup is required for a target that we are no longer | |
561 | going to be calling. Argument says whether we are quitting gdb and | |
562 | should not get hung in case of errors, or whether we want a clean | |
563 | termination even if it takes a while. This routine is automatically | |
564 | always called just before a routine is popped off the target stack. | |
565 | Closing file descriptors and freeing memory are typical things it should | |
566 | do. */ | |
567 | /* Close out all files and local state before this target loses control. */ | |
568 | ||
569 | static void | |
fba45db2 | 570 | gdbsim_close (int quitting) |
c906108c | 571 | { |
ea35711c | 572 | if (remote_debug) |
c906108c SS |
573 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); |
574 | ||
575 | program_loaded = 0; | |
576 | ||
577 | if (gdbsim_desc != NULL) | |
578 | { | |
579 | sim_close (gdbsim_desc, quitting); | |
580 | gdbsim_desc = NULL; | |
581 | } | |
582 | ||
583 | end_callbacks (); | |
75660bc0 | 584 | generic_mourn_inferior (); |
9de2bdd7 | 585 | delete_thread_silent (remote_sim_ptid); |
7f9f62ba | 586 | delete_inferior_silent (ptid_get_pid (remote_sim_ptid)); |
c906108c SS |
587 | } |
588 | ||
589 | /* Takes a program previously attached to and detaches it. | |
590 | The program may resume execution (some targets do, some don't) and will | |
591 | no longer stop on signals, etc. We better not have left any breakpoints | |
592 | in the program or it'll die when it hits one. ARGS is arguments | |
593 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
594 | says whether to be verbose or not. */ | |
595 | /* Terminate the open connection to the remote debugger. | |
596 | Use this when you want to detach and do something else with your gdb. */ | |
597 | ||
598 | static void | |
136d6dae | 599 | gdbsim_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 600 | { |
ea35711c | 601 | if (remote_debug) |
c906108c SS |
602 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); |
603 | ||
604 | pop_target (); /* calls gdbsim_close to do the real work */ | |
605 | if (from_tty) | |
606 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
607 | } | |
c5aa993b | 608 | |
c906108c SS |
609 | /* Resume execution of the target process. STEP says whether to single-step |
610 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
611 | to the target, or zero for no signal. */ | |
612 | ||
613 | static enum target_signal resume_siggnal; | |
614 | static int resume_step; | |
615 | ||
616 | static void | |
39f77062 | 617 | gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c | 618 | { |
9de2bdd7 | 619 | if (!ptid_equal (inferior_ptid, remote_sim_ptid)) |
8a3fe4f8 | 620 | error (_("The program is not being run.")); |
c906108c | 621 | |
ea35711c | 622 | if (remote_debug) |
c906108c SS |
623 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); |
624 | ||
625 | resume_siggnal = siggnal; | |
626 | resume_step = step; | |
627 | } | |
628 | ||
629 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 630 | |
c906108c SS |
631 | The simulator shall ensure that the stop request is eventually |
632 | delivered to the simulator. If the call is made while the | |
633 | simulator is not running then the stop request is processed when | |
634 | the simulator is next resumed. | |
635 | ||
636 | For simulators that do not support this operation, just abort */ | |
637 | ||
638 | static void | |
f9c72d52 | 639 | gdbsim_stop (ptid_t ptid) |
c906108c | 640 | { |
c5aa993b | 641 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
642 | { |
643 | quit (); | |
644 | } | |
645 | } | |
646 | ||
647 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 648 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
649 | |
650 | static int | |
fba45db2 | 651 | gdb_os_poll_quit (host_callback *p) |
c906108c | 652 | { |
98bbd631 AC |
653 | if (deprecated_ui_loop_hook != NULL) |
654 | deprecated_ui_loop_hook (0); | |
7a292a7a | 655 | |
c5aa993b | 656 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 657 | { |
c5aa993b | 658 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
659 | return 1; |
660 | } | |
661 | else if (immediate_quit) | |
662 | { | |
663 | return 1; | |
664 | } | |
665 | return 0; | |
666 | } | |
667 | ||
668 | /* Wait for inferior process to do something. Return pid of child, | |
669 | or -1 in case of error; store status through argument pointer STATUS, | |
670 | just as `wait' would. */ | |
671 | ||
672 | static void | |
fba45db2 | 673 | gdbsim_cntrl_c (int signo) |
c906108c | 674 | { |
0aef6ba2 | 675 | gdbsim_stop (remote_sim_ptid); |
c906108c SS |
676 | } |
677 | ||
39f77062 | 678 | static ptid_t |
117de6a9 PA |
679 | gdbsim_wait (struct target_ops *ops, |
680 | ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
681 | { |
682 | static RETSIGTYPE (*prev_sigint) (); | |
683 | int sigrc = 0; | |
684 | enum sim_stop reason = sim_running; | |
685 | ||
ea35711c | 686 | if (remote_debug) |
c906108c SS |
687 | printf_filtered ("gdbsim_wait\n"); |
688 | ||
689 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
690 | { | |
691 | struct sigaction sa, osa; | |
692 | sa.sa_handler = gdbsim_cntrl_c; | |
693 | sigemptyset (&sa.sa_mask); | |
694 | sa.sa_flags = 0; | |
695 | sigaction (SIGINT, &sa, &osa); | |
696 | prev_sigint = osa.sa_handler; | |
697 | } | |
698 | #else | |
699 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
700 | #endif | |
aba6488e | 701 | sim_resume (gdbsim_desc, resume_step, resume_siggnal); |
c906108c SS |
702 | signal (SIGINT, prev_sigint); |
703 | resume_step = 0; | |
704 | ||
705 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
706 | ||
707 | switch (reason) | |
708 | { | |
709 | case sim_exited: | |
710 | status->kind = TARGET_WAITKIND_EXITED; | |
711 | status->value.integer = sigrc; | |
712 | break; | |
713 | case sim_stopped: | |
714 | switch (sigrc) | |
715 | { | |
aba6488e | 716 | case TARGET_SIGNAL_ABRT: |
c906108c SS |
717 | quit (); |
718 | break; | |
aba6488e MM |
719 | case TARGET_SIGNAL_INT: |
720 | case TARGET_SIGNAL_TRAP: | |
c906108c SS |
721 | default: |
722 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 723 | status->value.sig = sigrc; |
c906108c SS |
724 | break; |
725 | } | |
726 | break; | |
727 | case sim_signalled: | |
728 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 729 | status->value.sig = sigrc; |
c906108c SS |
730 | break; |
731 | case sim_running: | |
732 | case sim_polling: | |
733 | /* FIXME: Is this correct? */ | |
734 | break; | |
735 | } | |
736 | ||
39f77062 | 737 | return inferior_ptid; |
c906108c SS |
738 | } |
739 | ||
740 | /* Get ready to modify the registers array. On machines which store | |
741 | individual registers, this doesn't need to do anything. On machines | |
742 | which store all the registers in one fell swoop, this makes sure | |
743 | that registers contains all the registers from the program being | |
744 | debugged. */ | |
745 | ||
746 | static void | |
316f2060 | 747 | gdbsim_prepare_to_store (struct regcache *regcache) |
c906108c SS |
748 | { |
749 | /* Do nothing, since we can store individual regs */ | |
750 | } | |
751 | ||
d93bce06 KB |
752 | /* Transfer LEN bytes between GDB address MYADDR and target address |
753 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
754 | otherwise transfer them from the target. TARGET is unused. | |
755 | ||
756 | Returns the number of bytes transferred. */ | |
757 | ||
c906108c | 758 | static int |
8d7337bf | 759 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
0a65a603 AC |
760 | int write, struct mem_attrib *attrib, |
761 | struct target_ops *target) | |
c906108c | 762 | { |
52bb452f DJ |
763 | /* If no program is running yet, then ignore the simulator for |
764 | memory. Pass the request down to the next target, hopefully | |
765 | an exec file. */ | |
766 | if (!target_has_execution) | |
767 | return 0; | |
768 | ||
c5aa993b | 769 | if (!program_loaded) |
8a3fe4f8 | 770 | error (_("No program loaded.")); |
c906108c | 771 | |
ea35711c | 772 | if (remote_debug) |
c906108c | 773 | { |
d4f3574e SS |
774 | /* FIXME: Send to something other than STDOUT? */ |
775 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
776 | gdb_print_host_address (myaddr, gdb_stdout); | |
777 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
778 | paddr_nz (memaddr), len, write); | |
ea35711c | 779 | if (remote_debug && write) |
c5aa993b | 780 | dump_mem (myaddr, len); |
c906108c SS |
781 | } |
782 | ||
783 | if (write) | |
784 | { | |
785 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
786 | } | |
c5aa993b | 787 | else |
c906108c SS |
788 | { |
789 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
ea35711c | 790 | if (remote_debug && len > 0) |
c5aa993b JM |
791 | dump_mem (myaddr, len); |
792 | } | |
c906108c SS |
793 | return len; |
794 | } | |
795 | ||
796 | static void | |
fba45db2 | 797 | gdbsim_files_info (struct target_ops *target) |
c906108c SS |
798 | { |
799 | char *file = "nothing"; | |
800 | ||
801 | if (exec_bfd) | |
802 | file = bfd_get_filename (exec_bfd); | |
803 | ||
ea35711c | 804 | if (remote_debug) |
c906108c SS |
805 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); |
806 | ||
807 | if (exec_bfd) | |
808 | { | |
809 | printf_filtered ("\tAttached to %s running program %s\n", | |
810 | target_shortname, file); | |
811 | sim_info (gdbsim_desc, 0); | |
812 | } | |
813 | } | |
814 | ||
815 | /* Clear the simulator's notion of what the break points are. */ | |
816 | ||
817 | static void | |
3c8b2eda | 818 | gdbsim_mourn_inferior (struct target_ops *target) |
c5aa993b | 819 | { |
ea35711c | 820 | if (remote_debug) |
c906108c SS |
821 | printf_filtered ("gdbsim_mourn_inferior:\n"); |
822 | ||
823 | remove_breakpoints (); | |
84290f2f | 824 | target_mark_exited (target); |
c906108c | 825 | generic_mourn_inferior (); |
9de2bdd7 | 826 | delete_thread_silent (remote_sim_ptid); |
c906108c SS |
827 | } |
828 | ||
c906108c SS |
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 | ||
8a3fe4f8 | 848 | error (_("Not connected to the simulator target")); |
c906108c SS |
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 | ||
9de2bdd7 PA |
858 | /* Check to see if a thread is still alive. */ |
859 | ||
860 | static int | |
28439f5e | 861 | gdbsim_thread_alive (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 PA |
862 | { |
863 | if (ptid_equal (ptid, remote_sim_ptid)) | |
864 | /* The simulators' task is always alive. */ | |
865 | return 1; | |
866 | ||
867 | return 0; | |
868 | } | |
869 | ||
870 | /* Convert a thread ID to a string. Returns the string in a static | |
871 | buffer. */ | |
872 | ||
873 | static char * | |
117de6a9 | 874 | gdbsim_pid_to_str (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 PA |
875 | { |
876 | static char buf[64]; | |
877 | ||
878 | if (ptid_equal (remote_sim_ptid, ptid)) | |
879 | { | |
880 | xsnprintf (buf, sizeof buf, "Thread <main>"); | |
881 | return buf; | |
882 | } | |
883 | ||
884 | return normal_pid_to_str (ptid); | |
885 | } | |
886 | ||
c906108c SS |
887 | /* Define the target subroutine names */ |
888 | ||
c5aa993b JM |
889 | struct target_ops gdbsim_ops; |
890 | ||
891 | static void | |
892 | init_gdbsim_ops (void) | |
893 | { | |
894 | gdbsim_ops.to_shortname = "sim"; | |
895 | gdbsim_ops.to_longname = "simulator"; | |
896 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
897 | gdbsim_ops.to_open = gdbsim_open; | |
898 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 899 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
900 | gdbsim_ops.to_resume = gdbsim_resume; |
901 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
902 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
903 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
904 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
c8e73a31 | 905 | gdbsim_ops.deprecated_xfer_memory = gdbsim_xfer_inferior_memory; |
c5aa993b | 906 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
907 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
908 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
909 | gdbsim_ops.to_kill = gdbsim_kill; |
910 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 911 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 912 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 913 | gdbsim_ops.to_stop = gdbsim_stop; |
9de2bdd7 PA |
914 | gdbsim_ops.to_thread_alive = gdbsim_thread_alive; |
915 | gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str; | |
c5aa993b | 916 | gdbsim_ops.to_stratum = process_stratum; |
c5aa993b JM |
917 | gdbsim_ops.to_has_all_memory = 1; |
918 | gdbsim_ops.to_has_memory = 1; | |
919 | gdbsim_ops.to_has_stack = 1; | |
920 | gdbsim_ops.to_has_registers = 1; | |
921 | gdbsim_ops.to_has_execution = 1; | |
c5aa993b | 922 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
923 | } |
924 | ||
925 | void | |
fba45db2 | 926 | _initialize_remote_sim (void) |
c906108c | 927 | { |
c5aa993b | 928 | init_gdbsim_ops (); |
c906108c SS |
929 | add_target (&gdbsim_ops); |
930 | ||
24ec834b | 931 | add_com ("sim", class_obscure, simulator_command, |
1bedd215 | 932 | _("Send a command to the simulator.")); |
9de2bdd7 PA |
933 | |
934 | /* Yes, 42000 is arbitrary. The only sense out of it, is that it | |
935 | isn't 0. */ | |
936 | remote_sim_ptid = ptid_build (42000, 0, 42000); | |
c906108c | 937 | } |