Commit | Line | Data |
---|---|---|
4f8d4a38 DD |
1 | /* gdb-if.c -- sim interface to GDB. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2008-2020 Free Software Foundation, Inc. |
4f8d4a38 DD |
4 | Contributed by Red Hat, Inc. |
5 | ||
6 | This file is part of the GNU simulators. | |
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 3 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, see <http://www.gnu.org/licenses/>. */ | |
20 | ||
8d794149 | 21 | #include "config.h" |
4f8d4a38 DD |
22 | #include <stdio.h> |
23 | #include <assert.h> | |
24 | #include <signal.h> | |
25 | #include <string.h> | |
26 | #include <ctype.h> | |
27 | #include <stdlib.h> | |
28 | ||
29 | #include "ansidecl.h" | |
30 | #include "gdb/callback.h" | |
31 | #include "gdb/remote-sim.h" | |
32 | #include "gdb/signals.h" | |
33 | #include "gdb/sim-rx.h" | |
34 | ||
35 | #include "cpu.h" | |
36 | #include "mem.h" | |
37 | #include "load.h" | |
38 | #include "syscalls.h" | |
39 | #include "err.h" | |
fd60dc69 | 40 | #include "trace.h" |
4f8d4a38 DD |
41 | |
42 | /* Ideally, we'd wrap up all the minisim's data structures in an | |
43 | object and pass that around. However, neither GDB nor run needs | |
44 | that ability. | |
45 | ||
46 | So we just have one instance, that lives in global variables, and | |
47 | each time we open it, we re-initialize it. */ | |
48 | struct sim_state | |
49 | { | |
50 | const char *message; | |
51 | }; | |
52 | ||
53 | static struct sim_state the_minisim = { | |
54 | "This is the sole rx minisim instance. See libsim.a's global variables." | |
55 | }; | |
56 | ||
a300380e | 57 | static int rx_sim_is_open; |
4f8d4a38 DD |
58 | |
59 | SIM_DESC | |
60 | sim_open (SIM_OPEN_KIND kind, | |
61 | struct host_callback_struct *callback, | |
2e3d4f4d | 62 | struct bfd *abfd, char * const *argv) |
4f8d4a38 | 63 | { |
a300380e | 64 | if (rx_sim_is_open) |
4f8d4a38 DD |
65 | fprintf (stderr, "rx minisim: re-opened sim\n"); |
66 | ||
67 | /* The 'run' interface doesn't use this function, so we don't care | |
68 | about KIND; it's always SIM_OPEN_DEBUG. */ | |
69 | if (kind != SIM_OPEN_DEBUG) | |
70 | fprintf (stderr, "rx minisim: sim_open KIND != SIM_OPEN_DEBUG: %d\n", | |
71 | kind); | |
72 | ||
73 | set_callbacks (callback); | |
74 | ||
75 | /* We don't expect any command-line arguments. */ | |
76 | ||
77 | init_mem (); | |
78 | init_regs (); | |
79 | execution_error_init_debugger (); | |
80 | ||
81 | sim_disasm_init (abfd); | |
a300380e | 82 | rx_sim_is_open = 1; |
4f8d4a38 DD |
83 | return &the_minisim; |
84 | } | |
85 | ||
86 | static void | |
87 | check_desc (SIM_DESC sd) | |
88 | { | |
89 | if (sd != &the_minisim) | |
90 | fprintf (stderr, "rx minisim: desc != &the_minisim\n"); | |
91 | } | |
92 | ||
93 | void | |
94 | sim_close (SIM_DESC sd, int quitting) | |
95 | { | |
96 | check_desc (sd); | |
97 | ||
98 | /* Not much to do. At least free up our memory. */ | |
99 | init_mem (); | |
100 | ||
a300380e | 101 | rx_sim_is_open = 0; |
4f8d4a38 DD |
102 | } |
103 | ||
104 | static bfd * | |
105 | open_objfile (const char *filename) | |
106 | { | |
107 | bfd *prog = bfd_openr (filename, 0); | |
108 | ||
109 | if (!prog) | |
110 | { | |
111 | fprintf (stderr, "Can't read %s\n", filename); | |
112 | return 0; | |
113 | } | |
114 | ||
115 | if (!bfd_check_format (prog, bfd_object)) | |
116 | { | |
117 | fprintf (stderr, "%s not a rx program\n", filename); | |
118 | return 0; | |
119 | } | |
120 | ||
121 | return prog; | |
122 | } | |
123 | ||
124 | static struct swap_list | |
125 | { | |
126 | bfd_vma start, end; | |
127 | struct swap_list *next; | |
128 | } *swap_list = NULL; | |
129 | ||
130 | static void | |
131 | free_swap_list (void) | |
132 | { | |
133 | while (swap_list) | |
134 | { | |
135 | struct swap_list *next = swap_list->next; | |
136 | free (swap_list); | |
137 | swap_list = next; | |
138 | } | |
139 | } | |
140 | ||
141 | /* When running in big endian mode, we must do an additional | |
142 | byte swap of memory areas used to hold instructions. See | |
143 | the comment preceding rx_load in load.c to see why this is | |
144 | so. | |
145 | ||
146 | Construct a list of memory areas that must be byte swapped. | |
147 | This list will be consulted when either reading or writing | |
148 | memory. */ | |
149 | ||
150 | static void | |
151 | build_swap_list (struct bfd *abfd) | |
152 | { | |
153 | asection *s; | |
154 | free_swap_list (); | |
155 | ||
156 | /* Nothing to do when in little endian mode. */ | |
157 | if (!rx_big_endian) | |
158 | return; | |
159 | ||
160 | for (s = abfd->sections; s; s = s->next) | |
161 | { | |
162 | if ((s->flags & SEC_LOAD) && (s->flags & SEC_CODE)) | |
163 | { | |
164 | struct swap_list *sl; | |
165 | bfd_size_type size; | |
166 | ||
fd361982 | 167 | size = bfd_section_size (s); |
4f8d4a38 DD |
168 | if (size <= 0) |
169 | continue; | |
170 | ||
171 | sl = malloc (sizeof (struct swap_list)); | |
172 | assert (sl != NULL); | |
173 | sl->next = swap_list; | |
fd361982 | 174 | sl->start = bfd_section_lma (s); |
4f8d4a38 DD |
175 | sl->end = sl->start + size; |
176 | swap_list = sl; | |
177 | } | |
178 | } | |
179 | } | |
180 | ||
181 | static int | |
182 | addr_in_swap_list (bfd_vma addr) | |
183 | { | |
184 | struct swap_list *s; | |
185 | ||
186 | for (s = swap_list; s; s = s->next) | |
187 | { | |
188 | if (s->start <= addr && addr < s->end) | |
189 | return 1; | |
190 | } | |
191 | return 0; | |
192 | } | |
193 | ||
194 | SIM_RC | |
b2b255bd | 195 | sim_load (SIM_DESC sd, const char *prog, struct bfd *abfd, int from_tty) |
4f8d4a38 DD |
196 | { |
197 | check_desc (sd); | |
198 | ||
199 | if (!abfd) | |
200 | abfd = open_objfile (prog); | |
201 | if (!abfd) | |
202 | return SIM_RC_FAIL; | |
203 | ||
d98bfeb0 | 204 | rx_load (abfd, get_callbacks ()); |
4f8d4a38 DD |
205 | build_swap_list (abfd); |
206 | ||
207 | return SIM_RC_OK; | |
208 | } | |
209 | ||
210 | SIM_RC | |
2e3d4f4d MF |
211 | sim_create_inferior (SIM_DESC sd, struct bfd *abfd, |
212 | char * const *argv, char * const *env) | |
4f8d4a38 DD |
213 | { |
214 | check_desc (sd); | |
215 | ||
216 | if (abfd) | |
217 | { | |
d98bfeb0 | 218 | rx_load (abfd, NULL); |
4f8d4a38 DD |
219 | build_swap_list (abfd); |
220 | } | |
221 | ||
222 | return SIM_RC_OK; | |
223 | } | |
224 | ||
225 | int | |
226 | sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) | |
227 | { | |
228 | int i; | |
229 | ||
230 | check_desc (sd); | |
231 | ||
232 | if (mem == 0) | |
233 | return 0; | |
234 | ||
235 | execution_error_clear_last_error (); | |
236 | ||
237 | for (i = 0; i < length; i++) | |
238 | { | |
239 | bfd_vma addr = mem + i; | |
240 | int do_swap = addr_in_swap_list (addr); | |
241 | buf[i] = mem_get_qi (addr ^ (do_swap ? 3 : 0)); | |
242 | ||
243 | if (execution_error_get_last_error () != SIM_ERR_NONE) | |
244 | return i; | |
245 | } | |
246 | ||
247 | return length; | |
248 | } | |
249 | ||
250 | int | |
5558e7e6 | 251 | sim_write (SIM_DESC sd, SIM_ADDR mem, const unsigned char *buf, int length) |
4f8d4a38 DD |
252 | { |
253 | int i; | |
254 | ||
255 | check_desc (sd); | |
256 | ||
257 | execution_error_clear_last_error (); | |
258 | ||
259 | for (i = 0; i < length; i++) | |
260 | { | |
261 | bfd_vma addr = mem + i; | |
262 | int do_swap = addr_in_swap_list (addr); | |
263 | mem_put_qi (addr ^ (do_swap ? 3 : 0), buf[i]); | |
264 | ||
265 | if (execution_error_get_last_error () != SIM_ERR_NONE) | |
266 | return i; | |
267 | } | |
268 | ||
269 | return length; | |
270 | } | |
271 | ||
272 | /* Read the LENGTH bytes at BUF as an little-endian value. */ | |
273 | static DI | |
274 | get_le (unsigned char *buf, int length) | |
275 | { | |
276 | DI acc = 0; | |
277 | while (--length >= 0) | |
278 | acc = (acc << 8) + buf[length]; | |
279 | ||
280 | return acc; | |
281 | } | |
282 | ||
283 | /* Read the LENGTH bytes at BUF as a big-endian value. */ | |
284 | static DI | |
285 | get_be (unsigned char *buf, int length) | |
286 | { | |
287 | DI acc = 0; | |
288 | while (length-- > 0) | |
289 | acc = (acc << 8) + *buf++; | |
290 | ||
291 | return acc; | |
292 | } | |
293 | ||
294 | /* Store VAL as a little-endian value in the LENGTH bytes at BUF. */ | |
295 | static void | |
296 | put_le (unsigned char *buf, int length, DI val) | |
297 | { | |
298 | int i; | |
299 | ||
300 | for (i = 0; i < length; i++) | |
301 | { | |
302 | buf[i] = val & 0xff; | |
303 | val >>= 8; | |
304 | } | |
305 | } | |
306 | ||
307 | /* Store VAL as a big-endian value in the LENGTH bytes at BUF. */ | |
308 | static void | |
309 | put_be (unsigned char *buf, int length, DI val) | |
310 | { | |
311 | int i; | |
312 | ||
313 | for (i = length-1; i >= 0; i--) | |
314 | { | |
315 | buf[i] = val & 0xff; | |
316 | val >>= 8; | |
317 | } | |
318 | } | |
319 | ||
320 | ||
321 | static int | |
322 | check_regno (enum sim_rx_regnum regno) | |
323 | { | |
324 | return 0 <= regno && regno < sim_rx_num_regs; | |
325 | } | |
326 | ||
327 | static size_t | |
328 | reg_size (enum sim_rx_regnum regno) | |
329 | { | |
330 | size_t size; | |
331 | ||
332 | switch (regno) | |
333 | { | |
334 | case sim_rx_r0_regnum: | |
335 | size = sizeof (regs.r[0]); | |
336 | break; | |
337 | case sim_rx_r1_regnum: | |
338 | size = sizeof (regs.r[1]); | |
339 | break; | |
340 | case sim_rx_r2_regnum: | |
341 | size = sizeof (regs.r[2]); | |
342 | break; | |
343 | case sim_rx_r3_regnum: | |
344 | size = sizeof (regs.r[3]); | |
345 | break; | |
346 | case sim_rx_r4_regnum: | |
347 | size = sizeof (regs.r[4]); | |
348 | break; | |
349 | case sim_rx_r5_regnum: | |
350 | size = sizeof (regs.r[5]); | |
351 | break; | |
352 | case sim_rx_r6_regnum: | |
353 | size = sizeof (regs.r[6]); | |
354 | break; | |
355 | case sim_rx_r7_regnum: | |
356 | size = sizeof (regs.r[7]); | |
357 | break; | |
358 | case sim_rx_r8_regnum: | |
359 | size = sizeof (regs.r[8]); | |
360 | break; | |
361 | case sim_rx_r9_regnum: | |
362 | size = sizeof (regs.r[9]); | |
363 | break; | |
364 | case sim_rx_r10_regnum: | |
365 | size = sizeof (regs.r[10]); | |
366 | break; | |
367 | case sim_rx_r11_regnum: | |
368 | size = sizeof (regs.r[11]); | |
369 | break; | |
370 | case sim_rx_r12_regnum: | |
371 | size = sizeof (regs.r[12]); | |
372 | break; | |
373 | case sim_rx_r13_regnum: | |
374 | size = sizeof (regs.r[13]); | |
375 | break; | |
376 | case sim_rx_r14_regnum: | |
377 | size = sizeof (regs.r[14]); | |
378 | break; | |
379 | case sim_rx_r15_regnum: | |
380 | size = sizeof (regs.r[15]); | |
381 | break; | |
382 | case sim_rx_isp_regnum: | |
383 | size = sizeof (regs.r_isp); | |
384 | break; | |
385 | case sim_rx_usp_regnum: | |
386 | size = sizeof (regs.r_usp); | |
387 | break; | |
388 | case sim_rx_intb_regnum: | |
389 | size = sizeof (regs.r_intb); | |
390 | break; | |
391 | case sim_rx_pc_regnum: | |
392 | size = sizeof (regs.r_pc); | |
393 | break; | |
394 | case sim_rx_ps_regnum: | |
395 | size = sizeof (regs.r_psw); | |
396 | break; | |
397 | case sim_rx_bpc_regnum: | |
398 | size = sizeof (regs.r_bpc); | |
399 | break; | |
400 | case sim_rx_bpsw_regnum: | |
401 | size = sizeof (regs.r_bpsw); | |
402 | break; | |
403 | case sim_rx_fintv_regnum: | |
404 | size = sizeof (regs.r_fintv); | |
405 | break; | |
406 | case sim_rx_fpsw_regnum: | |
407 | size = sizeof (regs.r_fpsw); | |
408 | break; | |
fd60dc69 KB |
409 | case sim_rx_acc_regnum: |
410 | size = sizeof (regs.r_acc); | |
411 | break; | |
4f8d4a38 DD |
412 | default: |
413 | size = 0; | |
414 | break; | |
415 | } | |
416 | return size; | |
417 | } | |
418 | ||
419 | int | |
420 | sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf, int length) | |
421 | { | |
422 | size_t size; | |
423 | DI val; | |
424 | ||
425 | check_desc (sd); | |
426 | ||
427 | if (!check_regno (regno)) | |
428 | return 0; | |
429 | ||
430 | size = reg_size (regno); | |
431 | ||
432 | if (length != size) | |
433 | return 0; | |
434 | ||
435 | switch (regno) | |
436 | { | |
437 | case sim_rx_r0_regnum: | |
438 | val = get_reg (0); | |
439 | break; | |
440 | case sim_rx_r1_regnum: | |
441 | val = get_reg (1); | |
442 | break; | |
443 | case sim_rx_r2_regnum: | |
444 | val = get_reg (2); | |
445 | break; | |
446 | case sim_rx_r3_regnum: | |
447 | val = get_reg (3); | |
448 | break; | |
449 | case sim_rx_r4_regnum: | |
450 | val = get_reg (4); | |
451 | break; | |
452 | case sim_rx_r5_regnum: | |
453 | val = get_reg (5); | |
454 | break; | |
455 | case sim_rx_r6_regnum: | |
456 | val = get_reg (6); | |
457 | break; | |
458 | case sim_rx_r7_regnum: | |
459 | val = get_reg (7); | |
460 | break; | |
461 | case sim_rx_r8_regnum: | |
462 | val = get_reg (8); | |
463 | break; | |
464 | case sim_rx_r9_regnum: | |
465 | val = get_reg (9); | |
466 | break; | |
467 | case sim_rx_r10_regnum: | |
468 | val = get_reg (10); | |
469 | break; | |
470 | case sim_rx_r11_regnum: | |
471 | val = get_reg (11); | |
472 | break; | |
473 | case sim_rx_r12_regnum: | |
474 | val = get_reg (12); | |
475 | break; | |
476 | case sim_rx_r13_regnum: | |
477 | val = get_reg (13); | |
478 | break; | |
479 | case sim_rx_r14_regnum: | |
480 | val = get_reg (14); | |
481 | break; | |
482 | case sim_rx_r15_regnum: | |
483 | val = get_reg (15); | |
484 | break; | |
485 | case sim_rx_isp_regnum: | |
486 | val = get_reg (isp); | |
487 | break; | |
488 | case sim_rx_usp_regnum: | |
489 | val = get_reg (usp); | |
490 | break; | |
491 | case sim_rx_intb_regnum: | |
492 | val = get_reg (intb); | |
493 | break; | |
494 | case sim_rx_pc_regnum: | |
495 | val = get_reg (pc); | |
496 | break; | |
497 | case sim_rx_ps_regnum: | |
498 | val = get_reg (psw); | |
499 | break; | |
500 | case sim_rx_bpc_regnum: | |
501 | val = get_reg (bpc); | |
502 | break; | |
503 | case sim_rx_bpsw_regnum: | |
504 | val = get_reg (bpsw); | |
505 | break; | |
506 | case sim_rx_fintv_regnum: | |
507 | val = get_reg (fintv); | |
508 | break; | |
509 | case sim_rx_fpsw_regnum: | |
510 | val = get_reg (fpsw); | |
511 | break; | |
fd60dc69 KB |
512 | case sim_rx_acc_regnum: |
513 | val = ((DI) get_reg (acchi) << 32) | get_reg (acclo); | |
514 | break; | |
4f8d4a38 DD |
515 | default: |
516 | fprintf (stderr, "rx minisim: unrecognized register number: %d\n", | |
517 | regno); | |
518 | return -1; | |
519 | } | |
520 | ||
521 | if (rx_big_endian) | |
522 | put_be (buf, length, val); | |
523 | else | |
524 | put_le (buf, length, val); | |
525 | ||
526 | return size; | |
527 | } | |
528 | ||
529 | int | |
530 | sim_store_register (SIM_DESC sd, int regno, unsigned char *buf, int length) | |
531 | { | |
532 | size_t size; | |
533 | DI val; | |
534 | ||
535 | check_desc (sd); | |
536 | ||
537 | if (!check_regno (regno)) | |
dae477fe | 538 | return -1; |
4f8d4a38 DD |
539 | |
540 | size = reg_size (regno); | |
541 | ||
542 | if (length != size) | |
dae477fe | 543 | return -1; |
4f8d4a38 DD |
544 | |
545 | if (rx_big_endian) | |
546 | val = get_be (buf, length); | |
547 | else | |
548 | val = get_le (buf, length); | |
549 | ||
550 | switch (regno) | |
551 | { | |
552 | case sim_rx_r0_regnum: | |
553 | put_reg (0, val); | |
554 | break; | |
555 | case sim_rx_r1_regnum: | |
556 | put_reg (1, val); | |
557 | break; | |
558 | case sim_rx_r2_regnum: | |
559 | put_reg (2, val); | |
560 | break; | |
561 | case sim_rx_r3_regnum: | |
562 | put_reg (3, val); | |
563 | break; | |
564 | case sim_rx_r4_regnum: | |
565 | put_reg (4, val); | |
566 | break; | |
567 | case sim_rx_r5_regnum: | |
568 | put_reg (5, val); | |
569 | break; | |
570 | case sim_rx_r6_regnum: | |
571 | put_reg (6, val); | |
572 | break; | |
573 | case sim_rx_r7_regnum: | |
574 | put_reg (7, val); | |
575 | break; | |
576 | case sim_rx_r8_regnum: | |
577 | put_reg (8, val); | |
578 | break; | |
579 | case sim_rx_r9_regnum: | |
580 | put_reg (9, val); | |
581 | break; | |
582 | case sim_rx_r10_regnum: | |
583 | put_reg (10, val); | |
584 | break; | |
585 | case sim_rx_r11_regnum: | |
586 | put_reg (11, val); | |
587 | break; | |
588 | case sim_rx_r12_regnum: | |
589 | put_reg (12, val); | |
590 | break; | |
591 | case sim_rx_r13_regnum: | |
592 | put_reg (13, val); | |
593 | break; | |
594 | case sim_rx_r14_regnum: | |
595 | put_reg (14, val); | |
596 | break; | |
597 | case sim_rx_r15_regnum: | |
598 | put_reg (15, val); | |
599 | break; | |
600 | case sim_rx_isp_regnum: | |
601 | put_reg (isp, val); | |
602 | break; | |
603 | case sim_rx_usp_regnum: | |
604 | put_reg (usp, val); | |
605 | break; | |
606 | case sim_rx_intb_regnum: | |
607 | put_reg (intb, val); | |
608 | break; | |
609 | case sim_rx_pc_regnum: | |
610 | put_reg (pc, val); | |
611 | break; | |
612 | case sim_rx_ps_regnum: | |
613 | put_reg (psw, val); | |
614 | break; | |
615 | case sim_rx_bpc_regnum: | |
616 | put_reg (bpc, val); | |
617 | break; | |
618 | case sim_rx_bpsw_regnum: | |
619 | put_reg (bpsw, val); | |
620 | break; | |
621 | case sim_rx_fintv_regnum: | |
622 | put_reg (fintv, val); | |
623 | break; | |
624 | case sim_rx_fpsw_regnum: | |
625 | put_reg (fpsw, val); | |
626 | break; | |
a1669f9a KB |
627 | case sim_rx_acc_regnum: |
628 | put_reg (acclo, val & 0xffffffff); | |
629 | put_reg (acchi, (val >> 32) & 0xffffffff); | |
630 | break; | |
4f8d4a38 DD |
631 | default: |
632 | fprintf (stderr, "rx minisim: unrecognized register number: %d\n", | |
633 | regno); | |
dae477fe | 634 | return 0; |
4f8d4a38 DD |
635 | } |
636 | ||
637 | return size; | |
638 | } | |
639 | ||
640 | void | |
641 | sim_info (SIM_DESC sd, int verbose) | |
642 | { | |
643 | check_desc (sd); | |
644 | ||
645 | printf ("The rx minisim doesn't collect any statistics.\n"); | |
646 | } | |
647 | ||
648 | static volatile int stop; | |
649 | static enum sim_stop reason; | |
650 | int siggnal; | |
651 | ||
652 | ||
653 | /* Given a signal number used by the RX bsp (that is, newlib), | |
fa0dd93e KB |
654 | return a target signal number used by GDB. */ |
655 | static int | |
656 | rx_signal_to_gdb_signal (int rx) | |
4f8d4a38 DD |
657 | { |
658 | switch (rx) | |
659 | { | |
660 | case 4: | |
fa0dd93e | 661 | return GDB_SIGNAL_ILL; |
4f8d4a38 DD |
662 | |
663 | case 5: | |
fa0dd93e | 664 | return GDB_SIGNAL_TRAP; |
4f8d4a38 DD |
665 | |
666 | case 10: | |
fa0dd93e | 667 | return GDB_SIGNAL_BUS; |
4f8d4a38 DD |
668 | |
669 | case 11: | |
fa0dd93e | 670 | return GDB_SIGNAL_SEGV; |
4f8d4a38 DD |
671 | |
672 | case 24: | |
fa0dd93e | 673 | return GDB_SIGNAL_XCPU; |
4f8d4a38 DD |
674 | |
675 | case 2: | |
fa0dd93e | 676 | return GDB_SIGNAL_INT; |
4f8d4a38 DD |
677 | |
678 | case 8: | |
fa0dd93e | 679 | return GDB_SIGNAL_FPE; |
4f8d4a38 DD |
680 | |
681 | case 6: | |
fa0dd93e | 682 | return GDB_SIGNAL_ABRT; |
4f8d4a38 DD |
683 | } |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | ||
689 | /* Take a step return code RC and set up the variables consulted by | |
690 | sim_stop_reason appropriately. */ | |
691 | void | |
692 | handle_step (int rc) | |
693 | { | |
694 | if (execution_error_get_last_error () != SIM_ERR_NONE) | |
695 | { | |
696 | reason = sim_stopped; | |
a493e3e2 | 697 | siggnal = GDB_SIGNAL_SEGV; |
4f8d4a38 DD |
698 | } |
699 | if (RX_STEPPED (rc) || RX_HIT_BREAK (rc)) | |
700 | { | |
701 | reason = sim_stopped; | |
a493e3e2 | 702 | siggnal = GDB_SIGNAL_TRAP; |
4f8d4a38 DD |
703 | } |
704 | else if (RX_STOPPED (rc)) | |
705 | { | |
706 | reason = sim_stopped; | |
fa0dd93e | 707 | siggnal = rx_signal_to_gdb_signal (RX_STOP_SIG (rc)); |
4f8d4a38 DD |
708 | } |
709 | else | |
710 | { | |
711 | assert (RX_EXITED (rc)); | |
712 | reason = sim_exited; | |
713 | siggnal = RX_EXIT_STATUS (rc); | |
714 | } | |
715 | } | |
716 | ||
717 | ||
718 | void | |
719 | sim_resume (SIM_DESC sd, int step, int sig_to_deliver) | |
720 | { | |
f9c7014e DD |
721 | int rc; |
722 | ||
4f8d4a38 DD |
723 | check_desc (sd); |
724 | ||
725 | if (sig_to_deliver != 0) | |
726 | { | |
727 | fprintf (stderr, | |
728 | "Warning: the rx minisim does not implement " | |
729 | "signal delivery yet.\n" "Resuming with no signal.\n"); | |
730 | } | |
731 | ||
732 | execution_error_clear_last_error (); | |
733 | ||
734 | if (step) | |
f9c7014e DD |
735 | { |
736 | rc = setjmp (decode_jmp_buf); | |
737 | if (rc == 0) | |
738 | rc = decode_opcode (); | |
739 | handle_step (rc); | |
740 | } | |
4f8d4a38 DD |
741 | else |
742 | { | |
743 | /* We don't clear 'stop' here, because then we would miss | |
744 | interrupts that arrived on the way here. Instead, we clear | |
745 | the flag in sim_stop_reason, after GDB has disabled the | |
746 | interrupt signal handler. */ | |
747 | for (;;) | |
748 | { | |
749 | if (stop) | |
750 | { | |
751 | stop = 0; | |
752 | reason = sim_stopped; | |
a493e3e2 | 753 | siggnal = GDB_SIGNAL_INT; |
4f8d4a38 DD |
754 | break; |
755 | } | |
756 | ||
f9c7014e DD |
757 | rc = setjmp (decode_jmp_buf); |
758 | if (rc == 0) | |
759 | rc = decode_opcode (); | |
4f8d4a38 DD |
760 | |
761 | if (execution_error_get_last_error () != SIM_ERR_NONE) | |
762 | { | |
763 | reason = sim_stopped; | |
a493e3e2 | 764 | siggnal = GDB_SIGNAL_SEGV; |
4f8d4a38 DD |
765 | break; |
766 | } | |
767 | ||
768 | if (!RX_STEPPED (rc)) | |
769 | { | |
770 | handle_step (rc); | |
771 | break; | |
772 | } | |
773 | } | |
774 | } | |
775 | } | |
776 | ||
777 | int | |
778 | sim_stop (SIM_DESC sd) | |
779 | { | |
780 | stop = 1; | |
781 | ||
782 | return 1; | |
783 | } | |
784 | ||
785 | void | |
786 | sim_stop_reason (SIM_DESC sd, enum sim_stop *reason_p, int *sigrc_p) | |
787 | { | |
788 | check_desc (sd); | |
789 | ||
790 | *reason_p = reason; | |
791 | *sigrc_p = siggnal; | |
792 | } | |
793 | ||
794 | void | |
60d847df | 795 | sim_do_command (SIM_DESC sd, const char *cmd) |
4f8d4a38 | 796 | { |
60d847df MF |
797 | const char *args; |
798 | char *p = strdup (cmd); | |
4f8d4a38 | 799 | |
60d847df | 800 | check_desc (sd); |
4f8d4a38 DD |
801 | |
802 | /* Skip leading whitespace. */ | |
803 | while (isspace (*p)) | |
804 | p++; | |
805 | ||
806 | /* Find the extent of the command word. */ | |
807 | for (p = cmd; *p; p++) | |
808 | if (isspace (*p)) | |
809 | break; | |
810 | ||
811 | /* Null-terminate the command word, and record the start of any | |
812 | further arguments. */ | |
4f8d4a38 DD |
813 | if (*p) |
814 | { | |
815 | *p = '\0'; | |
816 | args = p + 1; | |
817 | while (isspace (*args)) | |
818 | args++; | |
819 | } | |
820 | else | |
821 | args = p; | |
822 | ||
823 | if (strcmp (cmd, "trace") == 0) | |
824 | { | |
825 | if (strcmp (args, "on") == 0) | |
826 | trace = 1; | |
827 | else if (strcmp (args, "off") == 0) | |
828 | trace = 0; | |
829 | else | |
830 | printf ("The 'sim trace' command expects 'on' or 'off' " | |
831 | "as an argument.\n"); | |
832 | } | |
833 | else if (strcmp (cmd, "verbose") == 0) | |
834 | { | |
835 | if (strcmp (args, "on") == 0) | |
836 | verbose = 1; | |
12cb7388 KB |
837 | else if (strcmp (args, "noisy") == 0) |
838 | verbose = 2; | |
4f8d4a38 DD |
839 | else if (strcmp (args, "off") == 0) |
840 | verbose = 0; | |
841 | else | |
12cb7388 | 842 | printf ("The 'sim verbose' command expects 'on', 'noisy', or 'off'" |
4f8d4a38 DD |
843 | " as an argument.\n"); |
844 | } | |
845 | else | |
846 | printf ("The 'sim' command expects either 'trace' or 'verbose'" | |
847 | " as a subcommand.\n"); | |
60d847df MF |
848 | |
849 | free (p); | |
4f8d4a38 | 850 | } |
af9f7da7 MF |
851 | |
852 | char ** | |
3cb2ab1a | 853 | sim_complete_command (SIM_DESC sd, const char *text, const char *word) |
af9f7da7 MF |
854 | { |
855 | return NULL; | |
856 | } |