Commit | Line | Data |
---|---|---|
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 | |
56be3814 | 75 | static void gdbsim_fetch_register (struct regcache *regcache, int regno); |
c906108c | 76 | |
56be3814 | 77 | static void gdbsim_store_register (struct regcache *regcache, int regno); |
c906108c | 78 | |
a14ed312 | 79 | static void gdbsim_kill (void); |
c906108c | 80 | |
a14ed312 | 81 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 82 | |
a14ed312 | 83 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 84 | |
a14ed312 | 85 | static void gdbsim_close (int quitting); |
c906108c | 86 | |
136d6dae | 87 | static void gdbsim_detach (struct target_ops *ops, char *args, int from_tty); |
c906108c | 88 | |
39f77062 | 89 | static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal); |
c906108c | 90 | |
316f2060 | 91 | static void gdbsim_prepare_to_store (struct regcache *regcache); |
c906108c | 92 | |
a14ed312 | 93 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 94 | |
3c8b2eda | 95 | static void gdbsim_mourn_inferior (struct target_ops *target); |
c906108c | 96 | |
f9c72d52 | 97 | static void gdbsim_stop (ptid_t ptid); |
c906108c | 98 | |
a14ed312 | 99 | void simulator_command (char *args, int from_tty); |
c906108c SS |
100 | |
101 | /* Naming convention: | |
102 | ||
103 | sim_* are the interface to the simulator (see remote-sim.h). | |
104 | gdbsim_* are stuff which is internal to gdb. */ | |
105 | ||
106 | /* Forward data declarations */ | |
107 | extern struct target_ops gdbsim_ops; | |
108 | ||
109 | static int program_loaded = 0; | |
110 | ||
111 | /* We must keep track of whether the simulator has been opened or not because | |
112 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
113 | this. We also need to record the result of sim_open so we can pass it | |
114 | back to the other sim_foo routines. */ | |
115 | static SIM_DESC gdbsim_desc = 0; | |
116 | ||
9de2bdd7 PA |
117 | /* This is the ptid we use while we're connected to the simulator. |
118 | Its value is arbitrary, as the simulator target don't have a notion | |
119 | or processes or threads, but we need something non-null to place in | |
120 | inferior_ptid. */ | |
121 | static ptid_t remote_sim_ptid; | |
122 | ||
c906108c | 123 | static void |
fba45db2 | 124 | dump_mem (char *buf, int len) |
c906108c SS |
125 | { |
126 | if (len <= 8) | |
127 | { | |
128 | if (len == 8 || len == 4) | |
129 | { | |
130 | long l[2]; | |
131 | memcpy (l, buf, len); | |
d4f3574e | 132 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
133 | if (len == 8) |
134 | printf_filtered (" 0x%lx", l[1]); | |
135 | printf_filtered ("\n"); | |
c906108c SS |
136 | } |
137 | else | |
138 | { | |
139 | int i; | |
140 | printf_filtered ("\t"); | |
141 | for (i = 0; i < len; i++) | |
142 | printf_filtered ("0x%x ", buf[i]); | |
143 | printf_filtered ("\n"); | |
144 | } | |
145 | } | |
146 | } | |
147 | ||
148 | static host_callback gdb_callback; | |
149 | static int callbacks_initialized = 0; | |
150 | ||
151 | /* Initialize gdb_callback. */ | |
152 | ||
153 | static void | |
fba45db2 | 154 | init_callbacks (void) |
c906108c | 155 | { |
c5aa993b | 156 | if (!callbacks_initialized) |
c906108c SS |
157 | { |
158 | gdb_callback = default_callback; | |
159 | gdb_callback.init (&gdb_callback); | |
160 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
161 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
162 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
163 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
164 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
165 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
166 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
167 | gdb_callback.error = gdb_os_error; | |
168 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
169 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
170 | callbacks_initialized = 1; | |
171 | } | |
172 | } | |
173 | ||
174 | /* Release callbacks (free resources used by them). */ | |
175 | ||
176 | static void | |
fba45db2 | 177 | end_callbacks (void) |
c906108c SS |
178 | { |
179 | if (callbacks_initialized) | |
180 | { | |
181 | gdb_callback.shutdown (&gdb_callback); | |
182 | callbacks_initialized = 0; | |
183 | } | |
184 | } | |
185 | ||
186 | /* GDB version of os_write_stdout callback. */ | |
187 | ||
c5aa993b | 188 | static int |
fba45db2 | 189 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
190 | { |
191 | int i; | |
192 | char b[2]; | |
193 | ||
d9fcf2fb | 194 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
195 | return len; |
196 | } | |
197 | ||
198 | /* GDB version of os_flush_stdout callback. */ | |
199 | ||
200 | static void | |
fba45db2 | 201 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 202 | { |
4ce44c66 | 203 | gdb_flush (gdb_stdtarg); |
c906108c SS |
204 | } |
205 | ||
206 | /* GDB version of os_write_stderr callback. */ | |
207 | ||
c5aa993b | 208 | static int |
fba45db2 | 209 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
210 | { |
211 | int i; | |
212 | char b[2]; | |
213 | ||
c5aa993b | 214 | for (i = 0; i < len; i++) |
c906108c SS |
215 | { |
216 | b[0] = buf[i]; | |
217 | b[1] = 0; | |
22e8e3c7 | 218 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
219 | } |
220 | return len; | |
221 | } | |
222 | ||
223 | /* GDB version of os_flush_stderr callback. */ | |
224 | ||
225 | static void | |
fba45db2 | 226 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 227 | { |
22e8e3c7 | 228 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
229 | } |
230 | ||
231 | /* GDB version of printf_filtered callback. */ | |
232 | ||
c906108c | 233 | static void |
c5aa993b | 234 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
235 | { |
236 | va_list args; | |
c906108c | 237 | va_start (args, format); |
c906108c SS |
238 | |
239 | vfprintf_filtered (gdb_stdout, format, args); | |
240 | ||
241 | va_end (args); | |
242 | } | |
243 | ||
244 | /* GDB version of error vprintf_filtered. */ | |
245 | ||
c906108c | 246 | static void |
c5aa993b | 247 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
248 | { |
249 | vfprintf_filtered (gdb_stdout, format, ap); | |
250 | } | |
251 | ||
252 | /* GDB version of error evprintf_filtered. */ | |
253 | ||
c906108c | 254 | static void |
c5aa993b | 255 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
256 | { |
257 | vfprintf_filtered (gdb_stderr, format, ap); | |
258 | } | |
259 | ||
260 | /* GDB version of error callback. */ | |
261 | ||
c906108c | 262 | static void |
58d4abe1 | 263 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 264 | { |
58d4abe1 PA |
265 | va_list args; |
266 | va_start (args, format); | |
267 | verror (format, args); | |
268 | va_end (args); | |
c906108c SS |
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 | { |
d1a41061 | 402 | char **argv; |
1986bccd AS |
403 | char *prog; |
404 | ||
d1a41061 PP |
405 | if (args == NULL) |
406 | error_no_arg (_("program to load")); | |
1986bccd | 407 | |
d1a41061 | 408 | argv = gdb_buildargv (args); |
1986bccd AS |
409 | make_cleanup_freeargv (argv); |
410 | ||
411 | prog = tilde_expand (argv[0]); | |
412 | ||
413 | if (argv[1] != NULL) | |
414 | error (_("GDB sim does not yet support a load offset.")); | |
415 | ||
ea35711c | 416 | if (remote_debug) |
c906108c SS |
417 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); |
418 | ||
c906108c SS |
419 | /* FIXME: We will print two messages on error. |
420 | Need error to either not print anything if passed NULL or need | |
421 | another routine that doesn't take any arguments. */ | |
422 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
8a3fe4f8 | 423 | error (_("unable to load program")); |
c906108c SS |
424 | |
425 | /* FIXME: If a load command should reset the targets registers then | |
426 | a call to sim_create_inferior() should go here. */ | |
427 | ||
428 | program_loaded = 1; | |
429 | } | |
430 | ||
431 | ||
39f77062 | 432 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
433 | EXEC_FILE is the file to run. |
434 | ARGS is a string containing the arguments to the program. | |
435 | ENV is the environment vector to pass. Errors reported with error(). | |
436 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
437 | /* This is called not only when we first attach, but also when the | |
438 | user types "run" after having attached. */ | |
439 | ||
440 | static void | |
3c8b2eda TJB |
441 | gdbsim_create_inferior (struct target_ops *target, char *exec_file, char *args, |
442 | char **env, int from_tty) | |
c906108c SS |
443 | { |
444 | int len; | |
c5aa993b | 445 | char *arg_buf, **argv; |
c906108c SS |
446 | |
447 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 448 | warning (_("No executable file specified.")); |
c5aa993b | 449 | if (!program_loaded) |
8a3fe4f8 | 450 | warning (_("No program loaded.")); |
c906108c | 451 | |
ea35711c | 452 | if (remote_debug) |
c906108c | 453 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", |
c5aa993b | 454 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
455 | args); |
456 | ||
9de2bdd7 PA |
457 | if (ptid_equal (inferior_ptid, remote_sim_ptid)) |
458 | gdbsim_kill (); | |
c906108c SS |
459 | remove_breakpoints (); |
460 | init_wait_for_inferior (); | |
461 | ||
462 | if (exec_file != NULL) | |
463 | { | |
c5aa993b | 464 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
465 | arg_buf = (char *) alloca (len); |
466 | arg_buf[0] = '\0'; | |
467 | strcat (arg_buf, exec_file); | |
468 | strcat (arg_buf, " "); | |
469 | strcat (arg_buf, args); | |
d1a41061 | 470 | argv = gdb_buildargv (arg_buf); |
7a292a7a | 471 | make_cleanup_freeargv (argv); |
c906108c SS |
472 | } |
473 | else | |
474 | argv = NULL; | |
475 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
476 | ||
9de2bdd7 | 477 | inferior_ptid = remote_sim_ptid; |
6fbd21a1 | 478 | add_inferior_silent (ptid_get_pid (inferior_ptid)); |
9de2bdd7 PA |
479 | add_thread_silent (inferior_ptid); |
480 | ||
52bb452f | 481 | target_mark_running (&gdbsim_ops); |
c5aa993b | 482 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
483 | |
484 | clear_proceed_status (); | |
c906108c SS |
485 | } |
486 | ||
487 | /* The open routine takes the rest of the parameters from the command, | |
488 | and (if successful) pushes a new target onto the stack. | |
489 | Targets should supply this routine, if only to provide an error message. */ | |
490 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
491 | ||
492 | static void | |
fba45db2 | 493 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
494 | { |
495 | int len; | |
496 | char *arg_buf; | |
497 | char **argv; | |
498 | ||
ea35711c | 499 | if (remote_debug) |
c906108c SS |
500 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
501 | ||
502 | /* Remove current simulator if one exists. Only do this if the simulator | |
503 | has been opened because sim_close requires it. | |
504 | This is important because the call to push_target below will cause | |
505 | sim_close to be called if the simulator is already open, but push_target | |
506 | is called after sim_open! We can't move the call to push_target before | |
507 | the call to sim_open because sim_open may invoke `error'. */ | |
508 | if (gdbsim_desc != NULL) | |
509 | unpush_target (&gdbsim_ops); | |
510 | ||
c5aa993b | 511 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
512 | + strlen (" -E little") |
513 | + strlen (" --architecture=xxxxxxxxxx") | |
514 | + (args ? strlen (args) : 0) | |
c5aa993b | 515 | + 50) /* slack */ ; |
c906108c | 516 | arg_buf = (char *) alloca (len); |
c5aa993b | 517 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df DJ |
518 | /* Specify the byte order for the target when it is explicitly |
519 | specified by the user (not auto detected). */ | |
520 | switch (selected_byte_order ()) | |
c906108c | 521 | { |
a8cf2722 AC |
522 | case BFD_ENDIAN_BIG: |
523 | strcat (arg_buf, " -E big"); | |
524 | break; | |
525 | case BFD_ENDIAN_LITTLE: | |
526 | strcat (arg_buf, " -E little"); | |
527 | break; | |
528 | case BFD_ENDIAN_UNKNOWN: | |
529 | break; | |
c906108c SS |
530 | } |
531 | /* Specify the architecture of the target when it has been | |
532 | explicitly specified */ | |
a8cf2722 | 533 | if (selected_architecture_name () != NULL) |
c906108c SS |
534 | { |
535 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 536 | strcat (arg_buf, selected_architecture_name ()); |
c906108c SS |
537 | } |
538 | /* finally, any explicit args */ | |
539 | if (args) | |
540 | { | |
c5aa993b | 541 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
542 | strcat (arg_buf, args); |
543 | } | |
d1a41061 | 544 | argv = gdb_buildargv (arg_buf); |
7a292a7a | 545 | make_cleanup_freeargv (argv); |
c906108c SS |
546 | |
547 | init_callbacks (); | |
548 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
549 | ||
550 | if (gdbsim_desc == 0) | |
8a3fe4f8 | 551 | error (_("unable to create simulator instance")); |
c906108c SS |
552 | |
553 | push_target (&gdbsim_ops); | |
c906108c | 554 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
555 | |
556 | /* There's nothing running after "target sim" or "load"; not until | |
557 | "run". */ | |
558 | inferior_ptid = null_ptid; | |
559 | target_mark_exited (&gdbsim_ops); | |
c906108c SS |
560 | } |
561 | ||
562 | /* Does whatever cleanup is required for a target that we are no longer | |
563 | going to be calling. Argument says whether we are quitting gdb and | |
564 | should not get hung in case of errors, or whether we want a clean | |
565 | termination even if it takes a while. This routine is automatically | |
566 | always called just before a routine is popped off the target stack. | |
567 | Closing file descriptors and freeing memory are typical things it should | |
568 | do. */ | |
569 | /* Close out all files and local state before this target loses control. */ | |
570 | ||
571 | static void | |
fba45db2 | 572 | gdbsim_close (int quitting) |
c906108c | 573 | { |
ea35711c | 574 | if (remote_debug) |
c906108c SS |
575 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); |
576 | ||
577 | program_loaded = 0; | |
578 | ||
579 | if (gdbsim_desc != NULL) | |
580 | { | |
581 | sim_close (gdbsim_desc, quitting); | |
582 | gdbsim_desc = NULL; | |
583 | } | |
584 | ||
585 | end_callbacks (); | |
75660bc0 | 586 | generic_mourn_inferior (); |
9de2bdd7 | 587 | delete_thread_silent (remote_sim_ptid); |
7f9f62ba | 588 | delete_inferior_silent (ptid_get_pid (remote_sim_ptid)); |
c906108c SS |
589 | } |
590 | ||
591 | /* Takes a program previously attached to and detaches it. | |
592 | The program may resume execution (some targets do, some don't) and will | |
593 | no longer stop on signals, etc. We better not have left any breakpoints | |
594 | in the program or it'll die when it hits one. ARGS is arguments | |
595 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
596 | says whether to be verbose or not. */ | |
597 | /* Terminate the open connection to the remote debugger. | |
598 | Use this when you want to detach and do something else with your gdb. */ | |
599 | ||
600 | static void | |
136d6dae | 601 | gdbsim_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 602 | { |
ea35711c | 603 | if (remote_debug) |
c906108c SS |
604 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); |
605 | ||
606 | pop_target (); /* calls gdbsim_close to do the real work */ | |
607 | if (from_tty) | |
608 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
609 | } | |
c5aa993b | 610 | |
c906108c SS |
611 | /* Resume execution of the target process. STEP says whether to single-step |
612 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
613 | to the target, or zero for no signal. */ | |
614 | ||
615 | static enum target_signal resume_siggnal; | |
616 | static int resume_step; | |
617 | ||
618 | static void | |
39f77062 | 619 | gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c | 620 | { |
9de2bdd7 | 621 | if (!ptid_equal (inferior_ptid, remote_sim_ptid)) |
8a3fe4f8 | 622 | error (_("The program is not being run.")); |
c906108c | 623 | |
ea35711c | 624 | if (remote_debug) |
c906108c SS |
625 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); |
626 | ||
627 | resume_siggnal = siggnal; | |
628 | resume_step = step; | |
629 | } | |
630 | ||
631 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 632 | |
c906108c SS |
633 | The simulator shall ensure that the stop request is eventually |
634 | delivered to the simulator. If the call is made while the | |
635 | simulator is not running then the stop request is processed when | |
636 | the simulator is next resumed. | |
637 | ||
638 | For simulators that do not support this operation, just abort */ | |
639 | ||
640 | static void | |
f9c72d52 | 641 | gdbsim_stop (ptid_t ptid) |
c906108c | 642 | { |
c5aa993b | 643 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
644 | { |
645 | quit (); | |
646 | } | |
647 | } | |
648 | ||
649 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 650 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
651 | |
652 | static int | |
fba45db2 | 653 | gdb_os_poll_quit (host_callback *p) |
c906108c | 654 | { |
98bbd631 AC |
655 | if (deprecated_ui_loop_hook != NULL) |
656 | deprecated_ui_loop_hook (0); | |
7a292a7a | 657 | |
c5aa993b | 658 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 659 | { |
c5aa993b | 660 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
661 | return 1; |
662 | } | |
663 | else if (immediate_quit) | |
664 | { | |
665 | return 1; | |
666 | } | |
667 | return 0; | |
668 | } | |
669 | ||
670 | /* Wait for inferior process to do something. Return pid of child, | |
671 | or -1 in case of error; store status through argument pointer STATUS, | |
672 | just as `wait' would. */ | |
673 | ||
674 | static void | |
fba45db2 | 675 | gdbsim_cntrl_c (int signo) |
c906108c | 676 | { |
0aef6ba2 | 677 | gdbsim_stop (remote_sim_ptid); |
c906108c SS |
678 | } |
679 | ||
39f77062 | 680 | static ptid_t |
117de6a9 PA |
681 | gdbsim_wait (struct target_ops *ops, |
682 | ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
683 | { |
684 | static RETSIGTYPE (*prev_sigint) (); | |
685 | int sigrc = 0; | |
686 | enum sim_stop reason = sim_running; | |
687 | ||
ea35711c | 688 | if (remote_debug) |
c906108c SS |
689 | printf_filtered ("gdbsim_wait\n"); |
690 | ||
691 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
692 | { | |
693 | struct sigaction sa, osa; | |
694 | sa.sa_handler = gdbsim_cntrl_c; | |
695 | sigemptyset (&sa.sa_mask); | |
696 | sa.sa_flags = 0; | |
697 | sigaction (SIGINT, &sa, &osa); | |
698 | prev_sigint = osa.sa_handler; | |
699 | } | |
700 | #else | |
701 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
702 | #endif | |
aba6488e | 703 | sim_resume (gdbsim_desc, resume_step, resume_siggnal); |
c906108c SS |
704 | signal (SIGINT, prev_sigint); |
705 | resume_step = 0; | |
706 | ||
707 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
708 | ||
709 | switch (reason) | |
710 | { | |
711 | case sim_exited: | |
712 | status->kind = TARGET_WAITKIND_EXITED; | |
713 | status->value.integer = sigrc; | |
714 | break; | |
715 | case sim_stopped: | |
716 | switch (sigrc) | |
717 | { | |
aba6488e | 718 | case TARGET_SIGNAL_ABRT: |
c906108c SS |
719 | quit (); |
720 | break; | |
aba6488e MM |
721 | case TARGET_SIGNAL_INT: |
722 | case TARGET_SIGNAL_TRAP: | |
c906108c SS |
723 | default: |
724 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 725 | status->value.sig = sigrc; |
c906108c SS |
726 | break; |
727 | } | |
728 | break; | |
729 | case sim_signalled: | |
730 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 731 | status->value.sig = sigrc; |
c906108c SS |
732 | break; |
733 | case sim_running: | |
734 | case sim_polling: | |
735 | /* FIXME: Is this correct? */ | |
736 | break; | |
737 | } | |
738 | ||
39f77062 | 739 | return inferior_ptid; |
c906108c SS |
740 | } |
741 | ||
742 | /* Get ready to modify the registers array. On machines which store | |
743 | individual registers, this doesn't need to do anything. On machines | |
744 | which store all the registers in one fell swoop, this makes sure | |
745 | that registers contains all the registers from the program being | |
746 | debugged. */ | |
747 | ||
748 | static void | |
316f2060 | 749 | gdbsim_prepare_to_store (struct regcache *regcache) |
c906108c SS |
750 | { |
751 | /* Do nothing, since we can store individual regs */ | |
752 | } | |
753 | ||
d93bce06 KB |
754 | /* Transfer LEN bytes between GDB address MYADDR and target address |
755 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
756 | otherwise transfer them from the target. TARGET is unused. | |
757 | ||
758 | Returns the number of bytes transferred. */ | |
759 | ||
c906108c | 760 | static int |
8d7337bf | 761 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
0a65a603 AC |
762 | int write, struct mem_attrib *attrib, |
763 | struct target_ops *target) | |
c906108c | 764 | { |
52bb452f DJ |
765 | /* If no program is running yet, then ignore the simulator for |
766 | memory. Pass the request down to the next target, hopefully | |
767 | an exec file. */ | |
768 | if (!target_has_execution) | |
769 | return 0; | |
770 | ||
c5aa993b | 771 | if (!program_loaded) |
8a3fe4f8 | 772 | error (_("No program loaded.")); |
c906108c | 773 | |
ea35711c | 774 | if (remote_debug) |
c906108c | 775 | { |
d4f3574e SS |
776 | /* FIXME: Send to something other than STDOUT? */ |
777 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
778 | gdb_print_host_address (myaddr, gdb_stdout); | |
779 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
780 | paddr_nz (memaddr), len, write); | |
ea35711c | 781 | if (remote_debug && write) |
c5aa993b | 782 | dump_mem (myaddr, len); |
c906108c SS |
783 | } |
784 | ||
785 | if (write) | |
786 | { | |
787 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
788 | } | |
c5aa993b | 789 | else |
c906108c SS |
790 | { |
791 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
ea35711c | 792 | if (remote_debug && len > 0) |
c5aa993b JM |
793 | dump_mem (myaddr, len); |
794 | } | |
c906108c SS |
795 | return len; |
796 | } | |
797 | ||
798 | static void | |
fba45db2 | 799 | gdbsim_files_info (struct target_ops *target) |
c906108c SS |
800 | { |
801 | char *file = "nothing"; | |
802 | ||
803 | if (exec_bfd) | |
804 | file = bfd_get_filename (exec_bfd); | |
805 | ||
ea35711c | 806 | if (remote_debug) |
c906108c SS |
807 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); |
808 | ||
809 | if (exec_bfd) | |
810 | { | |
811 | printf_filtered ("\tAttached to %s running program %s\n", | |
812 | target_shortname, file); | |
813 | sim_info (gdbsim_desc, 0); | |
814 | } | |
815 | } | |
816 | ||
817 | /* Clear the simulator's notion of what the break points are. */ | |
818 | ||
819 | static void | |
3c8b2eda | 820 | gdbsim_mourn_inferior (struct target_ops *target) |
c5aa993b | 821 | { |
ea35711c | 822 | if (remote_debug) |
c906108c SS |
823 | printf_filtered ("gdbsim_mourn_inferior:\n"); |
824 | ||
825 | remove_breakpoints (); | |
84290f2f | 826 | target_mark_exited (target); |
c906108c | 827 | generic_mourn_inferior (); |
9de2bdd7 | 828 | delete_thread_silent (remote_sim_ptid); |
c906108c SS |
829 | } |
830 | ||
c906108c SS |
831 | /* Pass the command argument through to the simulator verbatim. The |
832 | simulator must do any command interpretation work. */ | |
833 | ||
834 | void | |
fba45db2 | 835 | simulator_command (char *args, int from_tty) |
c906108c SS |
836 | { |
837 | if (gdbsim_desc == NULL) | |
838 | { | |
839 | ||
840 | /* PREVIOUSLY: The user may give a command before the simulator | |
841 | is opened. [...] (??? assuming of course one wishes to | |
842 | continue to allow commands to be sent to unopened simulators, | |
843 | which isn't entirely unreasonable). */ | |
844 | ||
845 | /* The simulator is a builtin abstraction of a remote target. | |
846 | Consistent with that model, access to the simulator, via sim | |
847 | commands, is restricted to the period when the channel to the | |
848 | simulator is open. */ | |
849 | ||
8a3fe4f8 | 850 | error (_("Not connected to the simulator target")); |
c906108c SS |
851 | } |
852 | ||
853 | sim_do_command (gdbsim_desc, args); | |
854 | ||
855 | /* Invalidate the register cache, in case the simulator command does | |
856 | something funny. */ | |
c5aa993b | 857 | registers_changed (); |
c906108c SS |
858 | } |
859 | ||
9de2bdd7 PA |
860 | /* Check to see if a thread is still alive. */ |
861 | ||
862 | static int | |
863 | gdbsim_thread_alive (ptid_t ptid) | |
864 | { | |
865 | if (ptid_equal (ptid, remote_sim_ptid)) | |
866 | /* The simulators' task is always alive. */ | |
867 | return 1; | |
868 | ||
869 | return 0; | |
870 | } | |
871 | ||
872 | /* Convert a thread ID to a string. Returns the string in a static | |
873 | buffer. */ | |
874 | ||
875 | static char * | |
117de6a9 | 876 | gdbsim_pid_to_str (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 PA |
877 | { |
878 | static char buf[64]; | |
879 | ||
880 | if (ptid_equal (remote_sim_ptid, ptid)) | |
881 | { | |
882 | xsnprintf (buf, sizeof buf, "Thread <main>"); | |
883 | return buf; | |
884 | } | |
885 | ||
886 | return normal_pid_to_str (ptid); | |
887 | } | |
888 | ||
c906108c SS |
889 | /* Define the target subroutine names */ |
890 | ||
c5aa993b JM |
891 | struct target_ops gdbsim_ops; |
892 | ||
893 | static void | |
894 | init_gdbsim_ops (void) | |
895 | { | |
896 | gdbsim_ops.to_shortname = "sim"; | |
897 | gdbsim_ops.to_longname = "simulator"; | |
898 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
899 | gdbsim_ops.to_open = gdbsim_open; | |
900 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 901 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
902 | gdbsim_ops.to_resume = gdbsim_resume; |
903 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
904 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
905 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
906 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
c8e73a31 | 907 | gdbsim_ops.deprecated_xfer_memory = gdbsim_xfer_inferior_memory; |
c5aa993b | 908 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
909 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
910 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
911 | gdbsim_ops.to_kill = gdbsim_kill; |
912 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 913 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 914 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 915 | gdbsim_ops.to_stop = gdbsim_stop; |
9de2bdd7 PA |
916 | gdbsim_ops.to_thread_alive = gdbsim_thread_alive; |
917 | gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str; | |
c5aa993b | 918 | gdbsim_ops.to_stratum = process_stratum; |
c5aa993b JM |
919 | gdbsim_ops.to_has_all_memory = 1; |
920 | gdbsim_ops.to_has_memory = 1; | |
921 | gdbsim_ops.to_has_stack = 1; | |
922 | gdbsim_ops.to_has_registers = 1; | |
923 | gdbsim_ops.to_has_execution = 1; | |
c5aa993b | 924 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
925 | } |
926 | ||
927 | void | |
fba45db2 | 928 | _initialize_remote_sim (void) |
c906108c | 929 | { |
c5aa993b | 930 | init_gdbsim_ops (); |
c906108c SS |
931 | add_target (&gdbsim_ops); |
932 | ||
24ec834b | 933 | add_com ("sim", class_obscure, simulator_command, |
1bedd215 | 934 | _("Send a command to the simulator.")); |
9de2bdd7 PA |
935 | |
936 | /* Yes, 42000 is arbitrary. The only sense out of it, is that it | |
937 | isn't 0. */ | |
938 | remote_sim_ptid = ptid_build (42000, 0, 42000); | |
c906108c | 939 | } |