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4f8d4a38 DD |
1 | /* gdb-if.c -- sim interface to GDB. |
2 | ||
dc3cf14f | 3 | Copyright (C) 2008, 2009, 2010 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 | ||
21 | #include <stdio.h> | |
22 | #include <assert.h> | |
23 | #include <signal.h> | |
24 | #include <string.h> | |
25 | #include <ctype.h> | |
26 | #include <stdlib.h> | |
27 | ||
28 | #include "ansidecl.h" | |
29 | #include "gdb/callback.h" | |
30 | #include "gdb/remote-sim.h" | |
31 | #include "gdb/signals.h" | |
32 | #include "gdb/sim-rx.h" | |
33 | ||
34 | #include "cpu.h" | |
35 | #include "mem.h" | |
36 | #include "load.h" | |
37 | #include "syscalls.h" | |
38 | #include "err.h" | |
39 | ||
40 | /* Ideally, we'd wrap up all the minisim's data structures in an | |
41 | object and pass that around. However, neither GDB nor run needs | |
42 | that ability. | |
43 | ||
44 | So we just have one instance, that lives in global variables, and | |
45 | each time we open it, we re-initialize it. */ | |
46 | struct sim_state | |
47 | { | |
48 | const char *message; | |
49 | }; | |
50 | ||
51 | static struct sim_state the_minisim = { | |
52 | "This is the sole rx minisim instance. See libsim.a's global variables." | |
53 | }; | |
54 | ||
55 | static int open; | |
56 | ||
57 | SIM_DESC | |
58 | sim_open (SIM_OPEN_KIND kind, | |
59 | struct host_callback_struct *callback, | |
60 | struct bfd *abfd, char **argv) | |
61 | { | |
62 | if (open) | |
63 | fprintf (stderr, "rx minisim: re-opened sim\n"); | |
64 | ||
65 | /* The 'run' interface doesn't use this function, so we don't care | |
66 | about KIND; it's always SIM_OPEN_DEBUG. */ | |
67 | if (kind != SIM_OPEN_DEBUG) | |
68 | fprintf (stderr, "rx minisim: sim_open KIND != SIM_OPEN_DEBUG: %d\n", | |
69 | kind); | |
70 | ||
71 | set_callbacks (callback); | |
72 | ||
73 | /* We don't expect any command-line arguments. */ | |
74 | ||
75 | init_mem (); | |
76 | init_regs (); | |
77 | execution_error_init_debugger (); | |
78 | ||
79 | sim_disasm_init (abfd); | |
80 | open = 1; | |
81 | return &the_minisim; | |
82 | } | |
83 | ||
84 | static void | |
85 | check_desc (SIM_DESC sd) | |
86 | { | |
87 | if (sd != &the_minisim) | |
88 | fprintf (stderr, "rx minisim: desc != &the_minisim\n"); | |
89 | } | |
90 | ||
91 | void | |
92 | sim_close (SIM_DESC sd, int quitting) | |
93 | { | |
94 | check_desc (sd); | |
95 | ||
96 | /* Not much to do. At least free up our memory. */ | |
97 | init_mem (); | |
98 | ||
99 | open = 0; | |
100 | } | |
101 | ||
102 | static bfd * | |
103 | open_objfile (const char *filename) | |
104 | { | |
105 | bfd *prog = bfd_openr (filename, 0); | |
106 | ||
107 | if (!prog) | |
108 | { | |
109 | fprintf (stderr, "Can't read %s\n", filename); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | if (!bfd_check_format (prog, bfd_object)) | |
114 | { | |
115 | fprintf (stderr, "%s not a rx program\n", filename); | |
116 | return 0; | |
117 | } | |
118 | ||
119 | return prog; | |
120 | } | |
121 | ||
122 | static struct swap_list | |
123 | { | |
124 | bfd_vma start, end; | |
125 | struct swap_list *next; | |
126 | } *swap_list = NULL; | |
127 | ||
128 | static void | |
129 | free_swap_list (void) | |
130 | { | |
131 | while (swap_list) | |
132 | { | |
133 | struct swap_list *next = swap_list->next; | |
134 | free (swap_list); | |
135 | swap_list = next; | |
136 | } | |
137 | } | |
138 | ||
139 | /* When running in big endian mode, we must do an additional | |
140 | byte swap of memory areas used to hold instructions. See | |
141 | the comment preceding rx_load in load.c to see why this is | |
142 | so. | |
143 | ||
144 | Construct a list of memory areas that must be byte swapped. | |
145 | This list will be consulted when either reading or writing | |
146 | memory. */ | |
147 | ||
148 | static void | |
149 | build_swap_list (struct bfd *abfd) | |
150 | { | |
151 | asection *s; | |
152 | free_swap_list (); | |
153 | ||
154 | /* Nothing to do when in little endian mode. */ | |
155 | if (!rx_big_endian) | |
156 | return; | |
157 | ||
158 | for (s = abfd->sections; s; s = s->next) | |
159 | { | |
160 | if ((s->flags & SEC_LOAD) && (s->flags & SEC_CODE)) | |
161 | { | |
162 | struct swap_list *sl; | |
163 | bfd_size_type size; | |
164 | ||
165 | size = bfd_get_section_size (s); | |
166 | if (size <= 0) | |
167 | continue; | |
168 | ||
169 | sl = malloc (sizeof (struct swap_list)); | |
170 | assert (sl != NULL); | |
171 | sl->next = swap_list; | |
172 | sl->start = bfd_section_lma (abfd, s); | |
173 | sl->end = sl->start + size; | |
174 | swap_list = sl; | |
175 | } | |
176 | } | |
177 | } | |
178 | ||
179 | static int | |
180 | addr_in_swap_list (bfd_vma addr) | |
181 | { | |
182 | struct swap_list *s; | |
183 | ||
184 | for (s = swap_list; s; s = s->next) | |
185 | { | |
186 | if (s->start <= addr && addr < s->end) | |
187 | return 1; | |
188 | } | |
189 | return 0; | |
190 | } | |
191 | ||
192 | SIM_RC | |
193 | sim_load (SIM_DESC sd, char *prog, struct bfd *abfd, int from_tty) | |
194 | { | |
195 | check_desc (sd); | |
196 | ||
197 | if (!abfd) | |
198 | abfd = open_objfile (prog); | |
199 | if (!abfd) | |
200 | return SIM_RC_FAIL; | |
201 | ||
202 | rx_load (abfd); | |
203 | build_swap_list (abfd); | |
204 | ||
205 | return SIM_RC_OK; | |
206 | } | |
207 | ||
208 | SIM_RC | |
209 | sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char **argv, char **env) | |
210 | { | |
211 | check_desc (sd); | |
212 | ||
213 | if (abfd) | |
214 | { | |
215 | rx_load (abfd); | |
216 | build_swap_list (abfd); | |
217 | } | |
218 | ||
219 | return SIM_RC_OK; | |
220 | } | |
221 | ||
222 | int | |
223 | sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) | |
224 | { | |
225 | int i; | |
226 | ||
227 | check_desc (sd); | |
228 | ||
229 | if (mem == 0) | |
230 | return 0; | |
231 | ||
232 | execution_error_clear_last_error (); | |
233 | ||
234 | for (i = 0; i < length; i++) | |
235 | { | |
236 | bfd_vma addr = mem + i; | |
237 | int do_swap = addr_in_swap_list (addr); | |
238 | buf[i] = mem_get_qi (addr ^ (do_swap ? 3 : 0)); | |
239 | ||
240 | if (execution_error_get_last_error () != SIM_ERR_NONE) | |
241 | return i; | |
242 | } | |
243 | ||
244 | return length; | |
245 | } | |
246 | ||
247 | int | |
248 | sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) | |
249 | { | |
250 | int i; | |
251 | ||
252 | check_desc (sd); | |
253 | ||
254 | execution_error_clear_last_error (); | |
255 | ||
256 | for (i = 0; i < length; i++) | |
257 | { | |
258 | bfd_vma addr = mem + i; | |
259 | int do_swap = addr_in_swap_list (addr); | |
260 | mem_put_qi (addr ^ (do_swap ? 3 : 0), buf[i]); | |
261 | ||
262 | if (execution_error_get_last_error () != SIM_ERR_NONE) | |
263 | return i; | |
264 | } | |
265 | ||
266 | return length; | |
267 | } | |
268 | ||
269 | /* Read the LENGTH bytes at BUF as an little-endian value. */ | |
270 | static DI | |
271 | get_le (unsigned char *buf, int length) | |
272 | { | |
273 | DI acc = 0; | |
274 | while (--length >= 0) | |
275 | acc = (acc << 8) + buf[length]; | |
276 | ||
277 | return acc; | |
278 | } | |
279 | ||
280 | /* Read the LENGTH bytes at BUF as a big-endian value. */ | |
281 | static DI | |
282 | get_be (unsigned char *buf, int length) | |
283 | { | |
284 | DI acc = 0; | |
285 | while (length-- > 0) | |
286 | acc = (acc << 8) + *buf++; | |
287 | ||
288 | return acc; | |
289 | } | |
290 | ||
291 | /* Store VAL as a little-endian value in the LENGTH bytes at BUF. */ | |
292 | static void | |
293 | put_le (unsigned char *buf, int length, DI val) | |
294 | { | |
295 | int i; | |
296 | ||
297 | for (i = 0; i < length; i++) | |
298 | { | |
299 | buf[i] = val & 0xff; | |
300 | val >>= 8; | |
301 | } | |
302 | } | |
303 | ||
304 | /* Store VAL as a big-endian value in the LENGTH bytes at BUF. */ | |
305 | static void | |
306 | put_be (unsigned char *buf, int length, DI val) | |
307 | { | |
308 | int i; | |
309 | ||
310 | for (i = length-1; i >= 0; i--) | |
311 | { | |
312 | buf[i] = val & 0xff; | |
313 | val >>= 8; | |
314 | } | |
315 | } | |
316 | ||
317 | ||
318 | static int | |
319 | check_regno (enum sim_rx_regnum regno) | |
320 | { | |
321 | return 0 <= regno && regno < sim_rx_num_regs; | |
322 | } | |
323 | ||
324 | static size_t | |
325 | reg_size (enum sim_rx_regnum regno) | |
326 | { | |
327 | size_t size; | |
328 | ||
329 | switch (regno) | |
330 | { | |
331 | case sim_rx_r0_regnum: | |
332 | size = sizeof (regs.r[0]); | |
333 | break; | |
334 | case sim_rx_r1_regnum: | |
335 | size = sizeof (regs.r[1]); | |
336 | break; | |
337 | case sim_rx_r2_regnum: | |
338 | size = sizeof (regs.r[2]); | |
339 | break; | |
340 | case sim_rx_r3_regnum: | |
341 | size = sizeof (regs.r[3]); | |
342 | break; | |
343 | case sim_rx_r4_regnum: | |
344 | size = sizeof (regs.r[4]); | |
345 | break; | |
346 | case sim_rx_r5_regnum: | |
347 | size = sizeof (regs.r[5]); | |
348 | break; | |
349 | case sim_rx_r6_regnum: | |
350 | size = sizeof (regs.r[6]); | |
351 | break; | |
352 | case sim_rx_r7_regnum: | |
353 | size = sizeof (regs.r[7]); | |
354 | break; | |
355 | case sim_rx_r8_regnum: | |
356 | size = sizeof (regs.r[8]); | |
357 | break; | |
358 | case sim_rx_r9_regnum: | |
359 | size = sizeof (regs.r[9]); | |
360 | break; | |
361 | case sim_rx_r10_regnum: | |
362 | size = sizeof (regs.r[10]); | |
363 | break; | |
364 | case sim_rx_r11_regnum: | |
365 | size = sizeof (regs.r[11]); | |
366 | break; | |
367 | case sim_rx_r12_regnum: | |
368 | size = sizeof (regs.r[12]); | |
369 | break; | |
370 | case sim_rx_r13_regnum: | |
371 | size = sizeof (regs.r[13]); | |
372 | break; | |
373 | case sim_rx_r14_regnum: | |
374 | size = sizeof (regs.r[14]); | |
375 | break; | |
376 | case sim_rx_r15_regnum: | |
377 | size = sizeof (regs.r[15]); | |
378 | break; | |
379 | case sim_rx_isp_regnum: | |
380 | size = sizeof (regs.r_isp); | |
381 | break; | |
382 | case sim_rx_usp_regnum: | |
383 | size = sizeof (regs.r_usp); | |
384 | break; | |
385 | case sim_rx_intb_regnum: | |
386 | size = sizeof (regs.r_intb); | |
387 | break; | |
388 | case sim_rx_pc_regnum: | |
389 | size = sizeof (regs.r_pc); | |
390 | break; | |
391 | case sim_rx_ps_regnum: | |
392 | size = sizeof (regs.r_psw); | |
393 | break; | |
394 | case sim_rx_bpc_regnum: | |
395 | size = sizeof (regs.r_bpc); | |
396 | break; | |
397 | case sim_rx_bpsw_regnum: | |
398 | size = sizeof (regs.r_bpsw); | |
399 | break; | |
400 | case sim_rx_fintv_regnum: | |
401 | size = sizeof (regs.r_fintv); | |
402 | break; | |
403 | case sim_rx_fpsw_regnum: | |
404 | size = sizeof (regs.r_fpsw); | |
405 | break; | |
406 | default: | |
407 | size = 0; | |
408 | break; | |
409 | } | |
410 | return size; | |
411 | } | |
412 | ||
413 | int | |
414 | sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf, int length) | |
415 | { | |
416 | size_t size; | |
417 | DI val; | |
418 | ||
419 | check_desc (sd); | |
420 | ||
421 | if (!check_regno (regno)) | |
422 | return 0; | |
423 | ||
424 | size = reg_size (regno); | |
425 | ||
426 | if (length != size) | |
427 | return 0; | |
428 | ||
429 | switch (regno) | |
430 | { | |
431 | case sim_rx_r0_regnum: | |
432 | val = get_reg (0); | |
433 | break; | |
434 | case sim_rx_r1_regnum: | |
435 | val = get_reg (1); | |
436 | break; | |
437 | case sim_rx_r2_regnum: | |
438 | val = get_reg (2); | |
439 | break; | |
440 | case sim_rx_r3_regnum: | |
441 | val = get_reg (3); | |
442 | break; | |
443 | case sim_rx_r4_regnum: | |
444 | val = get_reg (4); | |
445 | break; | |
446 | case sim_rx_r5_regnum: | |
447 | val = get_reg (5); | |
448 | break; | |
449 | case sim_rx_r6_regnum: | |
450 | val = get_reg (6); | |
451 | break; | |
452 | case sim_rx_r7_regnum: | |
453 | val = get_reg (7); | |
454 | break; | |
455 | case sim_rx_r8_regnum: | |
456 | val = get_reg (8); | |
457 | break; | |
458 | case sim_rx_r9_regnum: | |
459 | val = get_reg (9); | |
460 | break; | |
461 | case sim_rx_r10_regnum: | |
462 | val = get_reg (10); | |
463 | break; | |
464 | case sim_rx_r11_regnum: | |
465 | val = get_reg (11); | |
466 | break; | |
467 | case sim_rx_r12_regnum: | |
468 | val = get_reg (12); | |
469 | break; | |
470 | case sim_rx_r13_regnum: | |
471 | val = get_reg (13); | |
472 | break; | |
473 | case sim_rx_r14_regnum: | |
474 | val = get_reg (14); | |
475 | break; | |
476 | case sim_rx_r15_regnum: | |
477 | val = get_reg (15); | |
478 | break; | |
479 | case sim_rx_isp_regnum: | |
480 | val = get_reg (isp); | |
481 | break; | |
482 | case sim_rx_usp_regnum: | |
483 | val = get_reg (usp); | |
484 | break; | |
485 | case sim_rx_intb_regnum: | |
486 | val = get_reg (intb); | |
487 | break; | |
488 | case sim_rx_pc_regnum: | |
489 | val = get_reg (pc); | |
490 | break; | |
491 | case sim_rx_ps_regnum: | |
492 | val = get_reg (psw); | |
493 | break; | |
494 | case sim_rx_bpc_regnum: | |
495 | val = get_reg (bpc); | |
496 | break; | |
497 | case sim_rx_bpsw_regnum: | |
498 | val = get_reg (bpsw); | |
499 | break; | |
500 | case sim_rx_fintv_regnum: | |
501 | val = get_reg (fintv); | |
502 | break; | |
503 | case sim_rx_fpsw_regnum: | |
504 | val = get_reg (fpsw); | |
505 | break; | |
506 | default: | |
507 | fprintf (stderr, "rx minisim: unrecognized register number: %d\n", | |
508 | regno); | |
509 | return -1; | |
510 | } | |
511 | ||
512 | if (rx_big_endian) | |
513 | put_be (buf, length, val); | |
514 | else | |
515 | put_le (buf, length, val); | |
516 | ||
517 | return size; | |
518 | } | |
519 | ||
520 | int | |
521 | sim_store_register (SIM_DESC sd, int regno, unsigned char *buf, int length) | |
522 | { | |
523 | size_t size; | |
524 | DI val; | |
525 | ||
526 | check_desc (sd); | |
527 | ||
528 | if (!check_regno (regno)) | |
529 | return 0; | |
530 | ||
531 | size = reg_size (regno); | |
532 | ||
533 | if (length != size) | |
534 | return 0; | |
535 | ||
536 | if (rx_big_endian) | |
537 | val = get_be (buf, length); | |
538 | else | |
539 | val = get_le (buf, length); | |
540 | ||
541 | switch (regno) | |
542 | { | |
543 | case sim_rx_r0_regnum: | |
544 | put_reg (0, val); | |
545 | break; | |
546 | case sim_rx_r1_regnum: | |
547 | put_reg (1, val); | |
548 | break; | |
549 | case sim_rx_r2_regnum: | |
550 | put_reg (2, val); | |
551 | break; | |
552 | case sim_rx_r3_regnum: | |
553 | put_reg (3, val); | |
554 | break; | |
555 | case sim_rx_r4_regnum: | |
556 | put_reg (4, val); | |
557 | break; | |
558 | case sim_rx_r5_regnum: | |
559 | put_reg (5, val); | |
560 | break; | |
561 | case sim_rx_r6_regnum: | |
562 | put_reg (6, val); | |
563 | break; | |
564 | case sim_rx_r7_regnum: | |
565 | put_reg (7, val); | |
566 | break; | |
567 | case sim_rx_r8_regnum: | |
568 | put_reg (8, val); | |
569 | break; | |
570 | case sim_rx_r9_regnum: | |
571 | put_reg (9, val); | |
572 | break; | |
573 | case sim_rx_r10_regnum: | |
574 | put_reg (10, val); | |
575 | break; | |
576 | case sim_rx_r11_regnum: | |
577 | put_reg (11, val); | |
578 | break; | |
579 | case sim_rx_r12_regnum: | |
580 | put_reg (12, val); | |
581 | break; | |
582 | case sim_rx_r13_regnum: | |
583 | put_reg (13, val); | |
584 | break; | |
585 | case sim_rx_r14_regnum: | |
586 | put_reg (14, val); | |
587 | break; | |
588 | case sim_rx_r15_regnum: | |
589 | put_reg (15, val); | |
590 | break; | |
591 | case sim_rx_isp_regnum: | |
592 | put_reg (isp, val); | |
593 | break; | |
594 | case sim_rx_usp_regnum: | |
595 | put_reg (usp, val); | |
596 | break; | |
597 | case sim_rx_intb_regnum: | |
598 | put_reg (intb, val); | |
599 | break; | |
600 | case sim_rx_pc_regnum: | |
601 | put_reg (pc, val); | |
602 | break; | |
603 | case sim_rx_ps_regnum: | |
604 | put_reg (psw, val); | |
605 | break; | |
606 | case sim_rx_bpc_regnum: | |
607 | put_reg (bpc, val); | |
608 | break; | |
609 | case sim_rx_bpsw_regnum: | |
610 | put_reg (bpsw, val); | |
611 | break; | |
612 | case sim_rx_fintv_regnum: | |
613 | put_reg (fintv, val); | |
614 | break; | |
615 | case sim_rx_fpsw_regnum: | |
616 | put_reg (fpsw, val); | |
617 | break; | |
618 | default: | |
619 | fprintf (stderr, "rx minisim: unrecognized register number: %d\n", | |
620 | regno); | |
621 | return -1; | |
622 | } | |
623 | ||
624 | return size; | |
625 | } | |
626 | ||
627 | void | |
628 | sim_info (SIM_DESC sd, int verbose) | |
629 | { | |
630 | check_desc (sd); | |
631 | ||
632 | printf ("The rx minisim doesn't collect any statistics.\n"); | |
633 | } | |
634 | ||
635 | static volatile int stop; | |
636 | static enum sim_stop reason; | |
637 | int siggnal; | |
638 | ||
639 | ||
640 | /* Given a signal number used by the RX bsp (that is, newlib), | |
641 | return a host signal number. (Oddly, the gdb/sim interface uses | |
642 | host signal numbers...) */ | |
643 | int | |
644 | rx_signal_to_host (int rx) | |
645 | { | |
646 | switch (rx) | |
647 | { | |
648 | case 4: | |
649 | #ifdef SIGILL | |
650 | return SIGILL; | |
651 | #else | |
652 | return SIGSEGV; | |
653 | #endif | |
654 | ||
655 | case 5: | |
656 | return SIGTRAP; | |
657 | ||
658 | case 10: | |
659 | #ifdef SIGBUS | |
660 | return SIGBUS; | |
661 | #else | |
662 | return SIGSEGV; | |
663 | #endif | |
664 | ||
665 | case 11: | |
666 | return SIGSEGV; | |
667 | ||
668 | case 24: | |
669 | #ifdef SIGXCPU | |
670 | return SIGXCPU; | |
671 | #else | |
672 | break; | |
673 | #endif | |
674 | ||
675 | case 2: | |
676 | return SIGINT; | |
677 | ||
678 | case 8: | |
679 | #ifdef SIGFPE | |
680 | return SIGFPE; | |
681 | #else | |
682 | break; | |
683 | #endif | |
684 | ||
685 | case 6: | |
686 | return SIGABRT; | |
687 | } | |
688 | ||
689 | return 0; | |
690 | } | |
691 | ||
692 | ||
693 | /* Take a step return code RC and set up the variables consulted by | |
694 | sim_stop_reason appropriately. */ | |
695 | void | |
696 | handle_step (int rc) | |
697 | { | |
698 | if (execution_error_get_last_error () != SIM_ERR_NONE) | |
699 | { | |
700 | reason = sim_stopped; | |
701 | siggnal = TARGET_SIGNAL_SEGV; | |
702 | } | |
703 | if (RX_STEPPED (rc) || RX_HIT_BREAK (rc)) | |
704 | { | |
705 | reason = sim_stopped; | |
706 | siggnal = TARGET_SIGNAL_TRAP; | |
707 | } | |
708 | else if (RX_STOPPED (rc)) | |
709 | { | |
710 | reason = sim_stopped; | |
711 | siggnal = rx_signal_to_host (RX_STOP_SIG (rc)); | |
712 | } | |
713 | else | |
714 | { | |
715 | assert (RX_EXITED (rc)); | |
716 | reason = sim_exited; | |
717 | siggnal = RX_EXIT_STATUS (rc); | |
718 | } | |
719 | } | |
720 | ||
721 | ||
722 | void | |
723 | sim_resume (SIM_DESC sd, int step, int sig_to_deliver) | |
724 | { | |
725 | check_desc (sd); | |
726 | ||
727 | if (sig_to_deliver != 0) | |
728 | { | |
729 | fprintf (stderr, | |
730 | "Warning: the rx minisim does not implement " | |
731 | "signal delivery yet.\n" "Resuming with no signal.\n"); | |
732 | } | |
733 | ||
734 | execution_error_clear_last_error (); | |
735 | ||
736 | if (step) | |
737 | handle_step (decode_opcode ()); | |
738 | else | |
739 | { | |
740 | /* We don't clear 'stop' here, because then we would miss | |
741 | interrupts that arrived on the way here. Instead, we clear | |
742 | the flag in sim_stop_reason, after GDB has disabled the | |
743 | interrupt signal handler. */ | |
744 | for (;;) | |
745 | { | |
746 | if (stop) | |
747 | { | |
748 | stop = 0; | |
749 | reason = sim_stopped; | |
750 | siggnal = TARGET_SIGNAL_INT; | |
751 | break; | |
752 | } | |
753 | ||
754 | int rc = decode_opcode (); | |
755 | ||
756 | if (execution_error_get_last_error () != SIM_ERR_NONE) | |
757 | { | |
758 | reason = sim_stopped; | |
759 | siggnal = TARGET_SIGNAL_SEGV; | |
760 | break; | |
761 | } | |
762 | ||
763 | if (!RX_STEPPED (rc)) | |
764 | { | |
765 | handle_step (rc); | |
766 | break; | |
767 | } | |
768 | } | |
769 | } | |
770 | } | |
771 | ||
772 | int | |
773 | sim_stop (SIM_DESC sd) | |
774 | { | |
775 | stop = 1; | |
776 | ||
777 | return 1; | |
778 | } | |
779 | ||
780 | void | |
781 | sim_stop_reason (SIM_DESC sd, enum sim_stop *reason_p, int *sigrc_p) | |
782 | { | |
783 | check_desc (sd); | |
784 | ||
785 | *reason_p = reason; | |
786 | *sigrc_p = siggnal; | |
787 | } | |
788 | ||
789 | void | |
790 | sim_do_command (SIM_DESC sd, char *cmd) | |
791 | { | |
792 | check_desc (sd); | |
793 | ||
794 | char *p = cmd; | |
795 | ||
796 | /* Skip leading whitespace. */ | |
797 | while (isspace (*p)) | |
798 | p++; | |
799 | ||
800 | /* Find the extent of the command word. */ | |
801 | for (p = cmd; *p; p++) | |
802 | if (isspace (*p)) | |
803 | break; | |
804 | ||
805 | /* Null-terminate the command word, and record the start of any | |
806 | further arguments. */ | |
807 | char *args; | |
808 | if (*p) | |
809 | { | |
810 | *p = '\0'; | |
811 | args = p + 1; | |
812 | while (isspace (*args)) | |
813 | args++; | |
814 | } | |
815 | else | |
816 | args = p; | |
817 | ||
818 | if (strcmp (cmd, "trace") == 0) | |
819 | { | |
820 | if (strcmp (args, "on") == 0) | |
821 | trace = 1; | |
822 | else if (strcmp (args, "off") == 0) | |
823 | trace = 0; | |
824 | else | |
825 | printf ("The 'sim trace' command expects 'on' or 'off' " | |
826 | "as an argument.\n"); | |
827 | } | |
828 | else if (strcmp (cmd, "verbose") == 0) | |
829 | { | |
830 | if (strcmp (args, "on") == 0) | |
831 | verbose = 1; | |
832 | else if (strcmp (args, "off") == 0) | |
833 | verbose = 0; | |
834 | else | |
835 | printf ("The 'sim verbose' command expects 'on' or 'off'" | |
836 | " as an argument.\n"); | |
837 | } | |
838 | else | |
839 | printf ("The 'sim' command expects either 'trace' or 'verbose'" | |
840 | " as a subcommand.\n"); | |
841 | } |