Commit | Line | Data |
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40b92220 | 1 | /* Generic remote debugging interface for simulators. |
286f83b4 | 2 | Copyright 1993, 1994, 1996, 1997 Free Software Foundation, Inc. |
40b92220 | 3 | Contributed by Cygnus Support. |
47424e79 | 4 | Steve Chamberlain (sac@cygnus.com). |
ec25d19b SC |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
6c9638b4 | 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
ec25d19b SC |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "wait.h" | |
25 | #include "value.h" | |
2b576293 | 26 | #include "gdb_string.h" |
ec25d19b SC |
27 | #include <ctype.h> |
28 | #include <fcntl.h> | |
29 | #include <signal.h> | |
30 | #include <setjmp.h> | |
31 | #include <errno.h> | |
32 | #include "terminal.h" | |
33 | #include "target.h" | |
34 | #include "gdbcore.h" | |
4da8b2a5 | 35 | #include "callback.h" |
59c2be48 | 36 | #include "remote-sim.h" |
f1e7bafc | 37 | #include "remote-utils.h" |
40b647e9 | 38 | #include "command.h" |
40b92220 | 39 | |
8501c742 SG |
40 | /* Prototypes */ |
41 | ||
42 | static void dump_mem PARAMS ((char *buf, int len)); | |
43 | ||
4da8b2a5 DE |
44 | static void init_callbacks PARAMS ((void)); |
45 | ||
46 | static void end_callbacks PARAMS ((void)); | |
47 | ||
48 | static int gdb_os_write_stdout PARAMS ((host_callback *, const char *, int)); | |
49 | ||
48ae8057 AC |
50 | static void gdb_os_flush_stdout PARAMS ((host_callback *)); |
51 | ||
52 | static int gdb_os_write_stderr PARAMS ((host_callback *, const char *, int)); | |
53 | ||
54 | static void gdb_os_flush_stderr PARAMS ((host_callback *)); | |
55 | ||
8517f62b AC |
56 | static int gdb_os_poll_quit PARAMS ((host_callback *)); |
57 | ||
48ae8057 | 58 | /* printf_filtered is depreciated */ |
4da8b2a5 DE |
59 | static void gdb_os_printf_filtered PARAMS ((host_callback *, const char *, ...)); |
60 | ||
8902803f | 61 | static void gdb_os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
48ae8057 | 62 | |
8902803f | 63 | static void gdb_os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
48ae8057 | 64 | |
163a75af DE |
65 | static void gdb_os_error PARAMS ((host_callback *, const char *, ...)); |
66 | ||
8501c742 SG |
67 | static void gdbsim_fetch_register PARAMS ((int regno)); |
68 | ||
69 | static void gdbsim_store_register PARAMS ((int regno)); | |
70 | ||
71 | static void gdbsim_kill PARAMS ((void)); | |
72 | ||
73 | static void gdbsim_load PARAMS ((char *prog, int fromtty)); | |
74 | ||
75 | static void gdbsim_create_inferior PARAMS ((char *exec_file, char *args, char **env)); | |
76 | ||
77 | static void gdbsim_open PARAMS ((char *args, int from_tty)); | |
78 | ||
79 | static void gdbsim_close PARAMS ((int quitting)); | |
80 | ||
81 | static void gdbsim_detach PARAMS ((char *args, int from_tty)); | |
82 | ||
83 | static void gdbsim_resume PARAMS ((int pid, int step, enum target_signal siggnal)); | |
84 | ||
85 | static int gdbsim_wait PARAMS ((int pid, struct target_waitstatus *status)); | |
86 | ||
87 | static void gdbsim_prepare_to_store PARAMS ((void)); | |
88 | ||
89 | static int gdbsim_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr, | |
90 | char *myaddr, int len, | |
91 | int write, | |
92 | struct target_ops *target)); | |
93 | ||
94 | static void gdbsim_files_info PARAMS ((struct target_ops *target)); | |
95 | ||
96 | static void gdbsim_mourn_inferior PARAMS ((void)); | |
97 | ||
8517f62b AC |
98 | static void gdbsim_stop PARAMS ((void)); |
99 | ||
253ceee6 | 100 | void simulator_command PARAMS ((char *args, int from_tty)); |
8501c742 | 101 | |
40b92220 JK |
102 | /* Naming convention: |
103 | ||
104 | sim_* are the interface to the simulator (see remote-sim.h). | |
40b92220 | 105 | gdbsim_* are stuff which is internal to gdb. */ |
ec25d19b SC |
106 | |
107 | /* Forward data declarations */ | |
40b92220 | 108 | extern struct target_ops gdbsim_ops; |
ec25d19b | 109 | |
40b92220 JK |
110 | static int program_loaded = 0; |
111 | ||
d9ad8adf DE |
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 | |
286f83b4 DE |
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; | |
d9ad8adf | 117 | |
40b92220 JK |
118 | static void |
119 | dump_mem (buf, len) | |
120 | char *buf; | |
ec25d19b SC |
121 | int len; |
122 | { | |
40b92220 JK |
123 | if (len <= 8) |
124 | { | |
125 | if (len == 8 || len == 4) | |
126 | { | |
127 | long l[2]; | |
128 | memcpy (l, buf, len); | |
129 | printf_filtered ("\t0x%x", l[0]); | |
130 | printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]); | |
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 | ||
4da8b2a5 DE |
143 | static host_callback gdb_callback; |
144 | static int callbacks_initialized = 0; | |
145 | ||
146 | /* Initialize gdb_callback. */ | |
147 | ||
148 | static void | |
149 | init_callbacks () | |
150 | { | |
151 | if (! callbacks_initialized) | |
152 | { | |
153 | gdb_callback = default_callback; | |
163a75af DE |
154 | gdb_callback.init (&gdb_callback); |
155 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
48ae8057 AC |
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; | |
163a75af | 159 | gdb_callback.printf_filtered = gdb_os_printf_filtered; |
48ae8057 AC |
160 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; |
161 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
1387cba1 | 162 | gdb_callback.error = gdb_os_error; |
8517f62b AC |
163 | gdb_callback.poll_quit = gdb_os_poll_quit; |
164 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
4da8b2a5 DE |
165 | callbacks_initialized = 1; |
166 | } | |
167 | } | |
168 | ||
169 | /* Release callbacks (free resources used by them). */ | |
170 | ||
171 | static void | |
172 | end_callbacks () | |
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 | ||
183 | static int | |
184 | gdb_os_write_stdout (p, buf, len) | |
185 | host_callback *p; | |
186 | const char *buf; | |
187 | int len; | |
188 | { | |
189 | int i; | |
190 | char b[2]; | |
191 | ||
192 | for (i = 0; i < len; i++) | |
193 | { | |
194 | b[0] = buf[i]; | |
195 | b[1] = 0; | |
196 | if (target_output_hook) | |
197 | target_output_hook (b); | |
198 | else | |
199 | fputs_filtered (b, gdb_stdout); | |
200 | } | |
201 | return len; | |
202 | } | |
203 | ||
48ae8057 AC |
204 | /* GDB version of os_flush_stdout callback. */ |
205 | ||
206 | static void | |
207 | gdb_os_flush_stdout (p) | |
208 | host_callback *p; | |
209 | { | |
210 | gdb_flush (gdb_stdout); | |
211 | } | |
212 | ||
213 | /* GDB version of os_write_stderr callback. */ | |
214 | ||
215 | static int | |
216 | gdb_os_write_stderr (p, buf, len) | |
217 | host_callback *p; | |
218 | const char *buf; | |
219 | int len; | |
220 | { | |
221 | int i; | |
222 | char b[2]; | |
223 | ||
224 | for (i = 0; i < len; i++) | |
225 | { | |
226 | b[0] = buf[i]; | |
227 | b[1] = 0; | |
228 | if (target_output_hook) | |
229 | target_output_hook (b); | |
230 | else | |
231 | fputs_filtered (b, gdb_stderr); | |
232 | } | |
233 | return len; | |
234 | } | |
235 | ||
236 | /* GDB version of os_flush_stderr callback. */ | |
237 | ||
238 | static void | |
239 | gdb_os_flush_stderr (p) | |
240 | host_callback *p; | |
241 | { | |
242 | gdb_flush (gdb_stderr); | |
243 | } | |
244 | ||
4da8b2a5 DE |
245 | /* GDB version of printf_filtered callback. */ |
246 | ||
247 | /* VARARGS */ | |
248 | static void | |
249 | #ifdef ANSI_PROTOTYPES | |
250 | gdb_os_printf_filtered (host_callback *p, const char *format, ...) | |
251 | #else | |
252 | gdb_os_printf_filtered (p, va_alist) | |
253 | host_callback *p; | |
254 | va_dcl | |
255 | #endif | |
256 | { | |
257 | va_list args; | |
258 | #ifdef ANSI_PROTOTYPES | |
259 | va_start (args, format); | |
260 | #else | |
261 | char *format; | |
262 | ||
263 | va_start (args); | |
264 | format = va_arg (args, char *); | |
265 | #endif | |
266 | ||
163a75af | 267 | vfprintf_filtered (gdb_stdout, format, args); |
4da8b2a5 DE |
268 | |
269 | va_end (args); | |
270 | } | |
271 | ||
48ae8057 AC |
272 | /* GDB version of error vprintf_filtered. */ |
273 | ||
274 | /* VARARGS */ | |
275 | static void | |
276 | #ifdef ANSI_PROTOTYPES | |
8902803f | 277 | gdb_os_vprintf_filtered (host_callback *p, const char *format, va_list ap) |
48ae8057 | 278 | #else |
011fa671 | 279 | gdb_os_vprintf_filtered (p, format, ap) |
48ae8057 | 280 | host_callback *p; |
011fa671 | 281 | char *format; |
8902803f | 282 | va_list ap; |
48ae8057 AC |
283 | #endif |
284 | { | |
8902803f | 285 | vfprintf_filtered (gdb_stdout, format, ap); |
48ae8057 AC |
286 | } |
287 | ||
288 | /* GDB version of error evprintf_filtered. */ | |
289 | ||
290 | /* VARARGS */ | |
291 | static void | |
292 | #ifdef ANSI_PROTOTYPES | |
8902803f | 293 | gdb_os_evprintf_filtered (host_callback *p, const char *format, va_list ap) |
48ae8057 | 294 | #else |
011fa671 | 295 | gdb_os_evprintf_filtered (p, format, ap) |
48ae8057 | 296 | host_callback *p; |
011fa671 | 297 | char *format; |
8902803f | 298 | va_list ap; |
48ae8057 AC |
299 | #endif |
300 | { | |
8902803f | 301 | vfprintf_filtered (gdb_stderr, format, ap); |
48ae8057 AC |
302 | } |
303 | ||
163a75af DE |
304 | /* GDB version of error callback. */ |
305 | ||
306 | /* VARARGS */ | |
307 | static void | |
308 | #ifdef ANSI_PROTOTYPES | |
309 | gdb_os_error (host_callback *p, const char *format, ...) | |
310 | #else | |
311 | gdb_os_error (p, va_alist) | |
312 | host_callback *p; | |
313 | va_dcl | |
314 | #endif | |
315 | { | |
316 | if (error_hook) | |
317 | (*error_hook) (); | |
318 | else | |
319 | { | |
320 | va_list args; | |
321 | #ifdef ANSI_PROTOTYPES | |
322 | va_start (args, format); | |
323 | #else | |
324 | char *format; | |
325 | ||
326 | va_start (args); | |
327 | format = va_arg (args, char *); | |
328 | #endif | |
329 | ||
330 | error_begin (); | |
331 | vfprintf_filtered (gdb_stderr, format, args); | |
332 | fprintf_filtered (gdb_stderr, "\n"); | |
333 | va_end (args); | |
334 | return_to_top_level (RETURN_ERROR); | |
335 | } | |
336 | } | |
337 | ||
40b92220 JK |
338 | static void |
339 | gdbsim_fetch_register (regno) | |
bccb2e7f | 340 | int regno; |
40b92220 | 341 | { |
5af9fc5f | 342 | static int warn_user = 1; |
40b92220 JK |
343 | if (regno == -1) |
344 | { | |
345 | for (regno = 0; regno < NUM_REGS; regno++) | |
346 | gdbsim_fetch_register (regno); | |
347 | } | |
9ddf9aa9 | 348 | else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') |
40b92220 JK |
349 | { |
350 | char buf[MAX_REGISTER_RAW_SIZE]; | |
bccb2e7f AC |
351 | int nr_bytes = sim_fetch_register (gdbsim_desc, regno, buf, REGISTER_RAW_SIZE (regno)); |
352 | if (nr_bytes == 0) | |
353 | /* register not applicable, supply zero's */ | |
354 | memset (buf, 0, MAX_REGISTER_RAW_SIZE); | |
5af9fc5f AC |
355 | else if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno) |
356 | && warn_user) | |
357 | { | |
358 | printf_unfiltered ("Size of register %s (%d) incorrect (%d instead of %d))", | |
9ddf9aa9 | 359 | REGISTER_NAME (regno), regno, |
5af9fc5f AC |
360 | nr_bytes, REGISTER_RAW_SIZE (regno)); |
361 | warn_user = 0; | |
362 | } | |
40b92220 JK |
363 | supply_register (regno, buf); |
364 | if (sr_get_debug ()) | |
365 | { | |
366 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
367 | /* FIXME: We could print something more intelligible. */ | |
368 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); | |
369 | } | |
370 | } | |
ec25d19b SC |
371 | } |
372 | ||
6b009ef6 | 373 | |
a944e79a | 374 | static void |
40b92220 | 375 | gdbsim_store_register (regno) |
bccb2e7f | 376 | int regno; |
ec25d19b SC |
377 | { |
378 | if (regno == -1) | |
40b92220 JK |
379 | { |
380 | for (regno = 0; regno < NUM_REGS; regno++) | |
381 | gdbsim_store_register (regno); | |
382 | } | |
9ddf9aa9 | 383 | else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') |
40b92220 | 384 | { |
3beff94e | 385 | char tmp[MAX_REGISTER_RAW_SIZE]; |
bccb2e7f | 386 | int nr_bytes; |
3beff94e | 387 | read_register_gen (regno, tmp); |
bccb2e7f AC |
388 | nr_bytes = sim_store_register (gdbsim_desc, regno, tmp, REGISTER_RAW_SIZE (regno)); |
389 | if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno)) | |
390 | fatal ("Register size different to expected"); | |
40b92220 JK |
391 | if (sr_get_debug ()) |
392 | { | |
393 | printf_filtered ("gdbsim_store_register: %d", regno); | |
394 | /* FIXME: We could print something more intelligible. */ | |
3beff94e | 395 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); |
40b92220 JK |
396 | } |
397 | } | |
ec25d19b SC |
398 | } |
399 | ||
47424e79 DE |
400 | /* Kill the running program. This may involve closing any open files |
401 | and releasing other resources acquired by the simulated program. */ | |
402 | ||
40b92220 JK |
403 | static void |
404 | gdbsim_kill () | |
405 | { | |
406 | if (sr_get_debug ()) | |
407 | printf_filtered ("gdbsim_kill\n"); | |
408 | ||
aa02a0b0 AC |
409 | /* There is no need to `kill' running simulator - the simulator is |
410 | not running */ | |
40b92220 JK |
411 | inferior_pid = 0; |
412 | } | |
413 | ||
414 | /* Load an executable file into the target process. This is expected to | |
415 | not only bring new code into the target process, but also to update | |
416 | GDB's symbol tables to match. */ | |
ec25d19b | 417 | |
ec25d19b | 418 | static void |
40b92220 JK |
419 | gdbsim_load (prog, fromtty) |
420 | char *prog; | |
421 | int fromtty; | |
ec25d19b | 422 | { |
40b92220 JK |
423 | if (sr_get_debug ()) |
424 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
ec25d19b | 425 | |
47424e79 DE |
426 | inferior_pid = 0; |
427 | ||
44cd79e4 DE |
428 | /* FIXME: We will print two messages on error. |
429 | Need error to either not print anything if passed NULL or need | |
430 | another routine that doesn't take any arguments. */ | |
431 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
432 | error ("unable to load program"); | |
47424e79 | 433 | |
fafce69a AC |
434 | /* FIXME: If a load command should reset the targets registers then |
435 | a call to sim_create_inferior() should go here. */ | |
436 | ||
44cd79e4 | 437 | program_loaded = 1; |
40b92220 JK |
438 | } |
439 | ||
ec25d19b | 440 | |
40b92220 JK |
441 | /* Start an inferior process and set inferior_pid to its pid. |
442 | EXEC_FILE is the file to run. | |
163a75af | 443 | ARGS is a string containing the arguments to the program. |
40b92220 JK |
444 | ENV is the environment vector to pass. Errors reported with error(). |
445 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
ec25d19b SC |
446 | /* This is called not only when we first attach, but also when the |
447 | user types "run" after having attached. */ | |
40b92220 JK |
448 | |
449 | static void | |
450 | gdbsim_create_inferior (exec_file, args, env) | |
451 | char *exec_file; | |
ec25d19b SC |
452 | char *args; |
453 | char **env; | |
454 | { | |
47424e79 | 455 | int len; |
40b92220 | 456 | char *arg_buf,**argv; |
ec25d19b | 457 | |
fafce69a | 458 | if (exec_file == 0 || exec_bfd == 0) |
b8464c15 | 459 | warning ("No executable file specified."); |
40b92220 | 460 | if (! program_loaded) |
fafce69a | 461 | warning ("No program loaded."); |
ec25d19b | 462 | |
40b92220 JK |
463 | if (sr_get_debug ()) |
464 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
fafce69a AC |
465 | (exec_file ? exec_file: "(NULL)"), |
466 | args); | |
40b92220 | 467 | |
8501c742 | 468 | gdbsim_kill (); |
40b92220 | 469 | remove_breakpoints (); |
ec25d19b | 470 | init_wait_for_inferior (); |
ec25d19b | 471 | |
fafce69a AC |
472 | if (exec_file != NULL) |
473 | { | |
474 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10; | |
475 | arg_buf = (char *) alloca (len); | |
476 | arg_buf[0] = '\0'; | |
477 | strcat (arg_buf, exec_file); | |
478 | strcat (arg_buf, " "); | |
479 | strcat (arg_buf, args); | |
480 | argv = buildargv (arg_buf); | |
c8623080 | 481 | make_cleanup ((make_cleanup_func) freeargv, argv); |
fafce69a AC |
482 | } |
483 | else | |
484 | argv = NULL; | |
485 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
40b92220 JK |
486 | |
487 | inferior_pid = 42; | |
fafce69a AC |
488 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
489 | ||
1931ea8d AC |
490 | clear_proceed_status (); |
491 | ||
fafce69a AC |
492 | /* NB: Entry point already set by sim_create_inferior. */ |
493 | proceed ((CORE_ADDR)-1, TARGET_SIGNAL_DEFAULT, 0); | |
40b92220 | 494 | } |
ec25d19b | 495 | |
40b92220 JK |
496 | /* The open routine takes the rest of the parameters from the command, |
497 | and (if successful) pushes a new target onto the stack. | |
498 | Targets should supply this routine, if only to provide an error message. */ | |
499 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
ec25d19b | 500 | |
a944e79a | 501 | static void |
40b92220 JK |
502 | gdbsim_open (args, from_tty) |
503 | char *args; | |
ec25d19b SC |
504 | int from_tty; |
505 | { | |
286f83b4 DE |
506 | int len; |
507 | char *arg_buf; | |
508 | char **argv; | |
509 | ||
40b92220 | 510 | if (sr_get_debug ()) |
47424e79 | 511 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
7a29d686 | 512 | |
d9ad8adf DE |
513 | /* Remove current simulator if one exists. Only do this if the simulator |
514 | has been opened because sim_close requires it. | |
515 | This is important because the call to push_target below will cause | |
516 | sim_close to be called if the simulator is already open, but push_target | |
517 | is called after sim_open! We can't move the call to push_target before | |
518 | the call to sim_open because sim_open may invoke `error'. */ | |
286f83b4 | 519 | if (gdbsim_desc != NULL) |
d9ad8adf DE |
520 | unpush_target (&gdbsim_ops); |
521 | ||
d0aba53f AC |
522 | len = (7 + 1 /* gdbsim */ |
523 | + strlen (" -E little") | |
2f1d67ec | 524 | + strlen (" --architecture=xxxxxxxxxx") |
d0aba53f AC |
525 | + (args ? strlen (args) : 0) |
526 | + 50) /* slack */; | |
286f83b4 | 527 | arg_buf = (char *) alloca (len); |
750b7942 AC |
528 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
529 | /* Specify the byte order for the target when it is both selectable | |
530 | and explicitly specified by the user (not auto detected). */ | |
0c4cec9f | 531 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
750b7942 AC |
532 | if (!target_byte_order_auto) |
533 | { | |
534 | switch (TARGET_BYTE_ORDER) | |
535 | { | |
536 | case BIG_ENDIAN: | |
537 | strcat (arg_buf, " -E big"); | |
538 | break; | |
539 | case LITTLE_ENDIAN: | |
540 | strcat (arg_buf, " -E little"); | |
541 | break; | |
542 | default: | |
543 | fatal ("Value of TARGET_BYTE_ORDER unknown"); | |
544 | } | |
545 | } | |
0c4cec9f | 546 | #endif |
d0aba53f AC |
547 | /* Specify the architecture of the target when it has been |
548 | explicitly specified */ | |
549 | if (!target_architecture_auto) | |
550 | { | |
2f1d67ec | 551 | strcat (arg_buf, " --architecture="); |
d0aba53f AC |
552 | strcat (arg_buf, target_architecture->printable_name); |
553 | } | |
750b7942 AC |
554 | /* finally, any explicit args */ |
555 | if (args) | |
556 | { | |
557 | strcat (arg_buf, " "); /* 1 */ | |
558 | strcat (arg_buf, args); | |
559 | } | |
286f83b4 DE |
560 | argv = buildargv (arg_buf); |
561 | if (argv == NULL) | |
562 | error ("Insufficient memory available to allocate simulator arg list."); | |
c8623080 | 563 | make_cleanup ((make_cleanup_func) freeargv, argv); |
286f83b4 | 564 | |
24aa2b57 | 565 | init_callbacks (); |
247fccde | 566 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); |
24aa2b57 | 567 | |
99097077 DE |
568 | if (gdbsim_desc == 0) |
569 | error ("unable to create simulator instance"); | |
3e38efa0 | 570 | |
40b92220 JK |
571 | push_target (&gdbsim_ops); |
572 | target_fetch_registers (-1); | |
40b92220 | 573 | printf_filtered ("Connected to the simulator.\n"); |
ec25d19b SC |
574 | } |
575 | ||
40b92220 JK |
576 | /* Does whatever cleanup is required for a target that we are no longer |
577 | going to be calling. Argument says whether we are quitting gdb and | |
578 | should not get hung in case of errors, or whether we want a clean | |
579 | termination even if it takes a while. This routine is automatically | |
580 | always called just before a routine is popped off the target stack. | |
581 | Closing file descriptors and freeing memory are typical things it should | |
582 | do. */ | |
ec25d19b SC |
583 | /* Close out all files and local state before this target loses control. */ |
584 | ||
a944e79a | 585 | static void |
40b92220 | 586 | gdbsim_close (quitting) |
ec25d19b SC |
587 | int quitting; |
588 | { | |
40b92220 JK |
589 | if (sr_get_debug ()) |
590 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
591 | ||
592 | program_loaded = 0; | |
593 | ||
286f83b4 | 594 | if (gdbsim_desc != NULL) |
d9ad8adf | 595 | { |
286f83b4 DE |
596 | sim_close (gdbsim_desc, quitting); |
597 | gdbsim_desc = NULL; | |
d9ad8adf | 598 | } |
4da8b2a5 DE |
599 | |
600 | end_callbacks (); | |
ec25d19b SC |
601 | } |
602 | ||
40b92220 JK |
603 | /* Takes a program previously attached to and detaches it. |
604 | The program may resume execution (some targets do, some don't) and will | |
605 | no longer stop on signals, etc. We better not have left any breakpoints | |
606 | in the program or it'll die when it hits one. ARGS is arguments | |
607 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
608 | says whether to be verbose or not. */ | |
ec25d19b | 609 | /* Terminate the open connection to the remote debugger. |
40b92220 JK |
610 | Use this when you want to detach and do something else with your gdb. */ |
611 | ||
612 | static void | |
613 | gdbsim_detach (args,from_tty) | |
ec25d19b SC |
614 | char *args; |
615 | int from_tty; | |
616 | { | |
40b92220 JK |
617 | if (sr_get_debug ()) |
618 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
a944e79a | 619 | |
40b92220 JK |
620 | pop_target (); /* calls gdbsim_close to do the real work */ |
621 | if (from_tty) | |
622 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
ec25d19b SC |
623 | } |
624 | ||
40b92220 JK |
625 | /* Resume execution of the target process. STEP says whether to single-step |
626 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
627 | to the target, or zero for no signal. */ | |
628 | ||
8517f62b AC |
629 | static enum target_signal resume_siggnal; |
630 | static int resume_step; | |
631 | ||
40b92220 JK |
632 | static void |
633 | gdbsim_resume (pid, step, siggnal) | |
67ac9759 JK |
634 | int pid, step; |
635 | enum target_signal siggnal; | |
40b92220 | 636 | { |
6bafbdfb JL |
637 | if (inferior_pid != 42) |
638 | error ("The program is not being run."); | |
639 | ||
40b92220 JK |
640 | if (sr_get_debug ()) |
641 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
ec25d19b | 642 | |
8517f62b AC |
643 | resume_siggnal = siggnal; |
644 | resume_step = step; | |
645 | } | |
646 | ||
647 | /* Notify the simulator of an asynchronous request to stop. | |
c14cabba AC |
648 | |
649 | The simulator shall ensure that the stop request is eventually | |
650 | delivered to the simulator. If the call is made while the | |
651 | simulator is not running then the stop request is processed when | |
652 | the simulator is next resumed. | |
653 | ||
654 | For simulators that do not support this operation, just abort */ | |
8517f62b AC |
655 | |
656 | static void | |
657 | gdbsim_stop () | |
658 | { | |
659 | if (! sim_stop (gdbsim_desc)) | |
660 | { | |
c14cabba | 661 | quit (); |
8517f62b | 662 | } |
40b92220 | 663 | } |
ec25d19b | 664 | |
c14cabba AC |
665 | /* GDB version of os_poll_quit callback. |
666 | Taken from gdb/util.c - should be in a library */ | |
667 | ||
668 | static int | |
669 | gdb_os_poll_quit (p) | |
670 | host_callback *p; | |
671 | { | |
672 | notice_quit (); | |
673 | if (quit_flag) /* gdb's idea of quit */ | |
674 | { | |
675 | quit_flag = 0; /* we've stolen it */ | |
676 | return 1; | |
677 | } | |
678 | else if (immediate_quit) | |
679 | { | |
680 | return 1; | |
681 | } | |
682 | return 0; | |
683 | } | |
684 | ||
40b92220 JK |
685 | /* Wait for inferior process to do something. Return pid of child, |
686 | or -1 in case of error; store status through argument pointer STATUS, | |
8517f62b AC |
687 | just as `wait' would. */ |
688 | ||
8517f62b | 689 | static void |
9447f05f JL |
690 | gdbsim_cntrl_c (signo) |
691 | int signo; | |
8517f62b AC |
692 | { |
693 | gdbsim_stop (); | |
694 | } | |
ec25d19b | 695 | |
40b92220 | 696 | static int |
de43d7d0 SG |
697 | gdbsim_wait (pid, status) |
698 | int pid; | |
67ac9759 | 699 | struct target_waitstatus *status; |
ec25d19b | 700 | { |
c14cabba | 701 | static RETSIGTYPE (*prev_sigint) (); |
8517f62b AC |
702 | int sigrc = 0; |
703 | enum sim_stop reason = sim_running; | |
592f517a | 704 | |
40b92220 | 705 | if (sr_get_debug ()) |
67ac9759 JK |
706 | printf_filtered ("gdbsim_wait\n"); |
707 | ||
e7ab2a47 AC |
708 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
709 | { | |
710 | struct sigaction sa, osa; | |
711 | sa.sa_handler = gdbsim_cntrl_c; | |
712 | sigemptyset (&sa.sa_mask); | |
713 | sa.sa_flags = 0; | |
714 | sigaction (SIGINT, &sa, &osa); | |
715 | prev_sigint = osa.sa_handler; | |
716 | } | |
717 | #else | |
8517f62b | 718 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); |
02475394 | 719 | #endif |
8517f62b AC |
720 | sim_resume (gdbsim_desc, resume_step, |
721 | target_signal_to_host (resume_siggnal)); | |
722 | signal (SIGINT, prev_sigint); | |
723 | resume_step = 0; | |
724 | ||
286f83b4 | 725 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); |
8517f62b | 726 | |
67ac9759 JK |
727 | switch (reason) |
728 | { | |
729 | case sim_exited: | |
730 | status->kind = TARGET_WAITKIND_EXITED; | |
731 | status->value.integer = sigrc; | |
732 | break; | |
733 | case sim_stopped: | |
8517f62b AC |
734 | switch (sigrc) |
735 | { | |
736 | case SIGABRT: | |
737 | quit (); | |
738 | break; | |
739 | case SIGINT: | |
740 | case SIGTRAP: | |
741 | default: | |
742 | status->kind = TARGET_WAITKIND_STOPPED; | |
743 | /* The signal in sigrc is a host signal. That probably | |
744 | should be fixed. */ | |
745 | status->value.sig = target_signal_from_host (sigrc); | |
746 | break; | |
747 | } | |
67ac9759 JK |
748 | break; |
749 | case sim_signalled: | |
750 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
751 | /* The signal in sigrc is a host signal. That probably | |
752 | should be fixed. */ | |
753 | status->value.sig = target_signal_from_host (sigrc); | |
754 | break; | |
40b647e9 FF |
755 | case sim_running: |
756 | case sim_polling: | |
757 | /* FIXME: Is this correct? */ | |
758 | break; | |
67ac9759 JK |
759 | } |
760 | ||
3f0184ac | 761 | return inferior_pid; |
ec25d19b SC |
762 | } |
763 | ||
40b92220 JK |
764 | /* Get ready to modify the registers array. On machines which store |
765 | individual registers, this doesn't need to do anything. On machines | |
766 | which store all the registers in one fell swoop, this makes sure | |
767 | that registers contains all the registers from the program being | |
768 | debugged. */ | |
769 | ||
ec25d19b | 770 | static void |
40b92220 | 771 | gdbsim_prepare_to_store () |
ec25d19b | 772 | { |
40b92220 | 773 | /* Do nothing, since we can store individual regs */ |
ec25d19b SC |
774 | } |
775 | ||
40b92220 JK |
776 | static int |
777 | gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
ec25d19b SC |
778 | CORE_ADDR memaddr; |
779 | char *myaddr; | |
780 | int len; | |
781 | int write; | |
782 | struct target_ops *target; /* ignored */ | |
783 | { | |
40b92220 JK |
784 | if (! program_loaded) |
785 | error ("No program loaded."); | |
786 | ||
787 | if (sr_get_debug ()) | |
788 | { | |
789 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n", | |
790 | myaddr, memaddr, len, write); | |
791 | if (sr_get_debug () && write) | |
792 | dump_mem(myaddr, len); | |
793 | } | |
794 | ||
ec25d19b | 795 | if (write) |
40b92220 | 796 | { |
286f83b4 | 797 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); |
40b92220 | 798 | } |
ec25d19b | 799 | else |
40b92220 | 800 | { |
286f83b4 | 801 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); |
40b92220 JK |
802 | if (sr_get_debug () && len > 0) |
803 | dump_mem(myaddr, len); | |
804 | } | |
ec25d19b SC |
805 | return len; |
806 | } | |
807 | ||
40b92220 JK |
808 | static void |
809 | gdbsim_files_info (target) | |
810 | struct target_ops *target; | |
811 | { | |
812 | char *file = "nothing"; | |
ec25d19b | 813 | |
40b92220 JK |
814 | if (exec_bfd) |
815 | file = bfd_get_filename (exec_bfd); | |
ec25d19b | 816 | |
40b92220 JK |
817 | if (sr_get_debug ()) |
818 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
819 | ||
820 | if (exec_bfd) | |
821 | { | |
822 | printf_filtered ("\tAttached to %s running program %s\n", | |
823 | target_shortname, file); | |
286f83b4 | 824 | sim_info (gdbsim_desc, 0); |
40b92220 | 825 | } |
ec25d19b SC |
826 | } |
827 | ||
fb506180 | 828 | /* Clear the simulator's notion of what the break points are. */ |
ec25d19b | 829 | |
40b92220 JK |
830 | static void |
831 | gdbsim_mourn_inferior () | |
832 | { | |
833 | if (sr_get_debug ()) | |
834 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
ec25d19b | 835 | |
40b92220 JK |
836 | remove_breakpoints (); |
837 | generic_mourn_inferior (); | |
ec25d19b | 838 | } |
40b92220 | 839 | |
45a70ed6 SG |
840 | static int |
841 | gdbsim_insert_breakpoint (addr, contents_cache) | |
842 | CORE_ADDR addr; | |
843 | char *contents_cache; | |
844 | { | |
845 | #ifdef SIM_HAS_BREAKPOINTS | |
846 | SIM_RC retcode; | |
847 | ||
848 | retcode = sim_set_breakpoint (gdbsim_desc, addr); | |
849 | ||
850 | switch (retcode) | |
851 | { | |
852 | case SIM_RC_OK: | |
853 | return 0; | |
854 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
855 | return ENOMEM; | |
856 | default: | |
857 | return EIO; | |
858 | } | |
859 | #else | |
860 | return memory_insert_breakpoint (addr, contents_cache); | |
861 | #endif | |
862 | } | |
863 | ||
864 | static int | |
865 | gdbsim_remove_breakpoint (addr, contents_cache) | |
866 | CORE_ADDR addr; | |
867 | char *contents_cache; | |
868 | { | |
869 | #ifdef SIM_HAS_BREAKPOINTS | |
870 | SIM_RC retcode; | |
871 | ||
872 | retcode = sim_clear_breakpoint (gdbsim_desc, addr); | |
873 | ||
874 | switch (retcode) | |
875 | { | |
876 | case SIM_RC_OK: | |
877 | case SIM_RC_UNKNOWN_BREAKPOINT: | |
878 | return 0; | |
879 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
880 | return ENOMEM; | |
881 | default: | |
882 | return EIO; | |
883 | } | |
884 | #else | |
885 | return memory_remove_breakpoint (addr, contents_cache); | |
886 | #endif | |
887 | } | |
888 | ||
07997f65 SS |
889 | /* Pass the command argument through to the simulator verbatim. The |
890 | simulator must do any command interpretation work. */ | |
ec25d19b | 891 | |
253ceee6 | 892 | void |
fb506180 SS |
893 | simulator_command (args, from_tty) |
894 | char *args; | |
895 | int from_tty; | |
ec25d19b | 896 | { |
1fa0cc2d AC |
897 | if (gdbsim_desc == NULL) |
898 | { | |
899 | ||
900 | /* PREVIOUSLY: The user may give a command before the simulator | |
901 | is opened. [...] (??? assuming of course one wishes to | |
902 | continue to allow commands to be sent to unopened simulators, | |
903 | which isn't entirely unreasonable). */ | |
904 | ||
905 | /* The simulator is a builtin abstraction of a remote target. | |
906 | Consistent with that model, access to the simulator, via sim | |
907 | commands, is restricted to the period when the channel to the | |
908 | simulator is open. */ | |
909 | ||
910 | error ("Not connected to the simulator target"); | |
911 | } | |
07997f65 | 912 | |
286f83b4 | 913 | sim_do_command (gdbsim_desc, args); |
902459f2 FCE |
914 | |
915 | /* Invalidate the register cache, in case the simulator command does | |
916 | something funny. */ | |
917 | registers_changed (); | |
fb506180 SS |
918 | } |
919 | ||
920 | /* Define the target subroutine names */ | |
921 | ||
c719b714 JM |
922 | struct target_ops gdbsim_ops ; |
923 | static void init_gdbsim_ops(void) | |
924 | { | |
925 | gdbsim_ops.to_shortname = "sim"; | |
926 | gdbsim_ops.to_longname = "simulator"; | |
927 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
928 | gdbsim_ops.to_open = gdbsim_open; | |
929 | gdbsim_ops.to_close = gdbsim_close; | |
930 | gdbsim_ops.to_attach = NULL; | |
931 | gdbsim_ops.to_detach = gdbsim_detach; | |
932 | gdbsim_ops.to_resume = gdbsim_resume; | |
933 | gdbsim_ops.to_wait = gdbsim_wait; | |
934 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; | |
935 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
936 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
937 | gdbsim_ops.to_xfer_memory = gdbsim_xfer_inferior_memory; | |
938 | gdbsim_ops.to_files_info = gdbsim_files_info; | |
939 | gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint; | |
940 | gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint; | |
941 | gdbsim_ops.to_terminal_init = NULL; | |
942 | gdbsim_ops.to_terminal_inferior = NULL; | |
943 | gdbsim_ops.to_terminal_ours_for_output = NULL; | |
944 | gdbsim_ops.to_terminal_ours = NULL; | |
945 | gdbsim_ops.to_terminal_info = NULL; | |
946 | gdbsim_ops.to_kill = gdbsim_kill; | |
947 | gdbsim_ops.to_load = gdbsim_load; | |
948 | gdbsim_ops.to_lookup_symbol = NULL; | |
949 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; | |
950 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; | |
951 | gdbsim_ops.to_can_run = 0; | |
952 | gdbsim_ops.to_notice_signals = 0; | |
953 | gdbsim_ops.to_thread_alive = 0; | |
954 | gdbsim_ops.to_stop = gdbsim_stop; | |
955 | gdbsim_ops.to_stratum = process_stratum; | |
956 | gdbsim_ops.DONT_USE = NULL; | |
957 | gdbsim_ops.to_has_all_memory = 1; | |
958 | gdbsim_ops.to_has_memory = 1; | |
959 | gdbsim_ops.to_has_stack = 1; | |
960 | gdbsim_ops.to_has_registers = 1; | |
961 | gdbsim_ops.to_has_execution = 1; | |
962 | gdbsim_ops.to_sections = NULL; | |
963 | gdbsim_ops.to_sections_end = NULL; | |
964 | gdbsim_ops.to_magic = OPS_MAGIC; | |
ec076280 RU |
965 | |
966 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
967 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
968 | #endif | |
c719b714 | 969 | } |
ec25d19b | 970 | |
ec25d19b SC |
971 | void |
972 | _initialize_remote_sim () | |
973 | { | |
c719b714 | 974 | init_gdbsim_ops() ; |
ec076280 | 975 | |
40b92220 | 976 | add_target (&gdbsim_ops); |
fb506180 SS |
977 | |
978 | add_com ("sim <command>", class_obscure, simulator_command, | |
979 | "Send a command to the simulator."); | |
ec25d19b | 980 | } |