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d45a4bef JB |
1 | /* gdb.c --- sim interface to GDB. |
2 | ||
9b254dd1 | 3 | Copyright (C) 2005, 2007, 2008 Free Software Foundation, Inc. |
d45a4bef JB |
4 | Contributed by Red Hat, Inc. |
5 | ||
6 | This file is part of the GNU simulators. | |
7 | ||
4744ac1b JB |
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. | |
d45a4bef | 12 | |
4744ac1b JB |
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. | |
d45a4bef JB |
17 | |
18 | You should have received a copy of the GNU General Public License | |
4744ac1b | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
d45a4bef JB |
20 | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <assert.h> | |
24 | #include <signal.h> | |
25 | #include <string.h> | |
26 | #include <ctype.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-m32c.h" | |
33 | ||
34 | #include "cpu.h" | |
35 | #include "mem.h" | |
36 | #include "load.h" | |
37 | #include "syscalls.h" | |
38 | ||
39 | /* I don't want to wrap up all the minisim's data structures in an | |
40 | object and pass that around. That'd be a big change, and neither | |
41 | GDB nor run needs that ability. | |
42 | ||
43 | So we just have one instance, that lives in global variables, and | |
44 | each time we open it, we re-initialize it. */ | |
45 | struct sim_state | |
46 | { | |
47 | const char *message; | |
48 | }; | |
49 | ||
50 | static struct sim_state the_minisim = { | |
51 | "This is the sole m32c minisim instance. See libsim.a's global variables." | |
52 | }; | |
53 | ||
54 | static int open; | |
55 | ||
56 | SIM_DESC | |
57 | sim_open (SIM_OPEN_KIND kind, | |
58 | struct host_callback_struct *callback, | |
59 | struct bfd *abfd, char **argv) | |
60 | { | |
3877a145 | 61 | setbuf (stdout, 0); |
d45a4bef JB |
62 | if (open) |
63 | fprintf (stderr, "m32c 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, "m32c minisim: sim_open KIND != SIM_OPEN_DEBUG: %d\n", | |
69 | kind); | |
70 | ||
71 | if (abfd) | |
72 | m32c_set_mach (bfd_get_mach (abfd)); | |
73 | ||
74 | /* We can use ABFD, if non-NULL to select the appropriate | |
75 | architecture. But we only support the r8c right now. */ | |
76 | ||
77 | set_callbacks (callback); | |
78 | ||
79 | /* We don't expect any command-line arguments. */ | |
80 | ||
81 | init_mem (); | |
82 | init_regs (); | |
83 | ||
84 | open = 1; | |
85 | return &the_minisim; | |
86 | } | |
87 | ||
88 | static void | |
89 | check_desc (SIM_DESC sd) | |
90 | { | |
91 | if (sd != &the_minisim) | |
92 | fprintf (stderr, "m32c minisim: desc != &the_minisim\n"); | |
93 | } | |
94 | ||
95 | void | |
96 | sim_close (SIM_DESC sd, int quitting) | |
97 | { | |
98 | check_desc (sd); | |
99 | ||
100 | /* Not much to do. At least free up our memory. */ | |
101 | init_mem (); | |
102 | ||
103 | open = 0; | |
104 | } | |
105 | ||
106 | static bfd * | |
107 | open_objfile (const char *filename) | |
108 | { | |
109 | bfd *prog = bfd_openr (filename, 0); | |
110 | ||
111 | if (!prog) | |
112 | { | |
113 | fprintf (stderr, "Can't read %s\n", filename); | |
114 | return 0; | |
115 | } | |
116 | ||
117 | if (!bfd_check_format (prog, bfd_object)) | |
118 | { | |
119 | fprintf (stderr, "%s not a m32c program\n", filename); | |
120 | return 0; | |
121 | } | |
122 | ||
123 | return prog; | |
124 | } | |
125 | ||
126 | ||
127 | SIM_RC | |
3877a145 | 128 | sim_load (SIM_DESC sd, char *prog, struct bfd * abfd, int from_tty) |
d45a4bef JB |
129 | { |
130 | check_desc (sd); | |
131 | ||
132 | if (!abfd) | |
133 | abfd = open_objfile (prog); | |
134 | if (!abfd) | |
135 | return SIM_RC_FAIL; | |
136 | ||
137 | m32c_load (abfd); | |
138 | ||
139 | return SIM_RC_OK; | |
140 | } | |
141 | ||
142 | SIM_RC | |
3877a145 | 143 | sim_create_inferior (SIM_DESC sd, struct bfd * abfd, char **argv, char **env) |
d45a4bef JB |
144 | { |
145 | check_desc (sd); | |
146 | ||
147 | if (abfd) | |
148 | m32c_load (abfd); | |
149 | ||
150 | return SIM_RC_OK; | |
151 | } | |
152 | ||
153 | int | |
154 | sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) | |
155 | { | |
156 | check_desc (sd); | |
157 | ||
158 | if (mem == 0) | |
159 | return 0; | |
160 | ||
161 | mem_get_blk ((int) mem, buf, length); | |
162 | ||
163 | return length; | |
164 | } | |
165 | ||
166 | int | |
167 | sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) | |
168 | { | |
169 | check_desc (sd); | |
170 | ||
171 | mem_put_blk ((int) mem, buf, length); | |
172 | ||
173 | return length; | |
174 | } | |
175 | ||
176 | ||
177 | /* Read the LENGTH bytes at BUF as an little-endian value. */ | |
178 | static DI | |
179 | get_le (unsigned char *buf, int length) | |
180 | { | |
181 | DI acc = 0; | |
182 | while (--length >= 0) | |
183 | acc = (acc << 8) + buf[length]; | |
184 | ||
185 | return acc; | |
186 | } | |
187 | ||
188 | /* Store VAL as a little-endian value in the LENGTH bytes at BUF. */ | |
189 | static void | |
190 | put_le (unsigned char *buf, int length, DI val) | |
191 | { | |
192 | int i; | |
193 | ||
194 | for (i = 0; i < length; i++) | |
195 | { | |
196 | buf[i] = val & 0xff; | |
197 | val >>= 8; | |
198 | } | |
199 | } | |
200 | ||
201 | static int | |
202 | check_regno (enum m32c_sim_reg regno) | |
203 | { | |
204 | return 0 <= regno && regno < m32c_sim_reg_num_regs; | |
205 | } | |
206 | ||
207 | static size_t | |
208 | mask_size (int addr_mask) | |
209 | { | |
210 | switch (addr_mask) | |
211 | { | |
212 | case 0xffff: | |
213 | return 2; | |
214 | case 0xfffff: | |
215 | case 0xffffff: | |
216 | return 3; | |
217 | default: | |
218 | fprintf (stderr, | |
219 | "m32c minisim: addr_mask_size: unexpected mask 0x%x\n", | |
220 | addr_mask); | |
221 | return sizeof (addr_mask); | |
222 | } | |
223 | } | |
224 | ||
225 | static size_t | |
226 | reg_size (enum m32c_sim_reg regno) | |
227 | { | |
228 | switch (regno) | |
229 | { | |
230 | case m32c_sim_reg_r0_bank0: | |
231 | case m32c_sim_reg_r1_bank0: | |
232 | case m32c_sim_reg_r2_bank0: | |
233 | case m32c_sim_reg_r3_bank0: | |
234 | case m32c_sim_reg_r0_bank1: | |
235 | case m32c_sim_reg_r1_bank1: | |
236 | case m32c_sim_reg_r2_bank1: | |
237 | case m32c_sim_reg_r3_bank1: | |
238 | case m32c_sim_reg_flg: | |
239 | case m32c_sim_reg_svf: | |
240 | return 2; | |
241 | ||
242 | case m32c_sim_reg_a0_bank0: | |
243 | case m32c_sim_reg_a1_bank0: | |
244 | case m32c_sim_reg_fb_bank0: | |
245 | case m32c_sim_reg_sb_bank0: | |
246 | case m32c_sim_reg_a0_bank1: | |
247 | case m32c_sim_reg_a1_bank1: | |
248 | case m32c_sim_reg_fb_bank1: | |
249 | case m32c_sim_reg_sb_bank1: | |
250 | case m32c_sim_reg_usp: | |
251 | case m32c_sim_reg_isp: | |
252 | return mask_size (addr_mask); | |
253 | ||
254 | case m32c_sim_reg_pc: | |
255 | case m32c_sim_reg_intb: | |
256 | case m32c_sim_reg_svp: | |
257 | case m32c_sim_reg_vct: | |
258 | return mask_size (membus_mask); | |
259 | ||
260 | case m32c_sim_reg_dmd0: | |
261 | case m32c_sim_reg_dmd1: | |
262 | return 1; | |
263 | ||
264 | case m32c_sim_reg_dct0: | |
265 | case m32c_sim_reg_dct1: | |
266 | case m32c_sim_reg_drc0: | |
267 | case m32c_sim_reg_drc1: | |
268 | return 2; | |
269 | ||
270 | case m32c_sim_reg_dma0: | |
271 | case m32c_sim_reg_dma1: | |
272 | case m32c_sim_reg_dsa0: | |
273 | case m32c_sim_reg_dsa1: | |
274 | case m32c_sim_reg_dra0: | |
275 | case m32c_sim_reg_dra1: | |
276 | return 3; | |
277 | ||
278 | default: | |
279 | fprintf (stderr, "m32c minisim: unrecognized register number: %d\n", | |
280 | regno); | |
281 | return -1; | |
282 | } | |
283 | } | |
284 | ||
285 | int | |
286 | sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf, int length) | |
287 | { | |
288 | size_t size; | |
289 | ||
290 | check_desc (sd); | |
291 | ||
292 | if (!check_regno (regno)) | |
293 | return 0; | |
294 | ||
295 | size = reg_size (regno); | |
296 | if (length == size) | |
297 | { | |
298 | DI val; | |
299 | ||
300 | switch (regno) | |
301 | { | |
302 | case m32c_sim_reg_r0_bank0: | |
303 | val = regs.r[0].r_r0; | |
304 | break; | |
305 | case m32c_sim_reg_r1_bank0: | |
306 | val = regs.r[0].r_r1; | |
307 | break; | |
308 | case m32c_sim_reg_r2_bank0: | |
309 | val = regs.r[0].r_r2; | |
310 | break; | |
311 | case m32c_sim_reg_r3_bank0: | |
312 | val = regs.r[0].r_r3; | |
313 | break; | |
314 | case m32c_sim_reg_a0_bank0: | |
315 | val = regs.r[0].r_a0; | |
316 | break; | |
317 | case m32c_sim_reg_a1_bank0: | |
318 | val = regs.r[0].r_a1; | |
319 | break; | |
320 | case m32c_sim_reg_fb_bank0: | |
321 | val = regs.r[0].r_fb; | |
322 | break; | |
323 | case m32c_sim_reg_sb_bank0: | |
324 | val = regs.r[0].r_sb; | |
325 | break; | |
326 | case m32c_sim_reg_r0_bank1: | |
327 | val = regs.r[1].r_r0; | |
328 | break; | |
329 | case m32c_sim_reg_r1_bank1: | |
330 | val = regs.r[1].r_r1; | |
331 | break; | |
332 | case m32c_sim_reg_r2_bank1: | |
333 | val = regs.r[1].r_r2; | |
334 | break; | |
335 | case m32c_sim_reg_r3_bank1: | |
336 | val = regs.r[1].r_r3; | |
337 | break; | |
338 | case m32c_sim_reg_a0_bank1: | |
339 | val = regs.r[1].r_a0; | |
340 | break; | |
341 | case m32c_sim_reg_a1_bank1: | |
342 | val = regs.r[1].r_a1; | |
343 | break; | |
344 | case m32c_sim_reg_fb_bank1: | |
345 | val = regs.r[1].r_fb; | |
346 | break; | |
347 | case m32c_sim_reg_sb_bank1: | |
348 | val = regs.r[1].r_sb; | |
349 | break; | |
350 | ||
351 | case m32c_sim_reg_usp: | |
352 | val = regs.r_usp; | |
353 | break; | |
354 | case m32c_sim_reg_isp: | |
355 | val = regs.r_isp; | |
356 | break; | |
357 | case m32c_sim_reg_pc: | |
358 | val = regs.r_pc; | |
359 | break; | |
360 | case m32c_sim_reg_intb: | |
361 | val = regs.r_intbl * 65536 + regs.r_intbl; | |
362 | break; | |
363 | case m32c_sim_reg_flg: | |
364 | val = regs.r_flags; | |
365 | break; | |
366 | ||
367 | /* These registers aren't implemented by the minisim. */ | |
368 | case m32c_sim_reg_svf: | |
369 | case m32c_sim_reg_svp: | |
370 | case m32c_sim_reg_vct: | |
371 | case m32c_sim_reg_dmd0: | |
372 | case m32c_sim_reg_dmd1: | |
373 | case m32c_sim_reg_dct0: | |
374 | case m32c_sim_reg_dct1: | |
375 | case m32c_sim_reg_drc0: | |
376 | case m32c_sim_reg_drc1: | |
377 | case m32c_sim_reg_dma0: | |
378 | case m32c_sim_reg_dma1: | |
379 | case m32c_sim_reg_dsa0: | |
380 | case m32c_sim_reg_dsa1: | |
381 | case m32c_sim_reg_dra0: | |
382 | case m32c_sim_reg_dra1: | |
383 | return 0; | |
384 | ||
385 | default: | |
386 | fprintf (stderr, "m32c minisim: unrecognized register number: %d\n", | |
387 | regno); | |
388 | return -1; | |
389 | } | |
390 | ||
391 | put_le (buf, length, val); | |
392 | } | |
393 | ||
394 | return size; | |
395 | } | |
396 | ||
397 | int | |
398 | sim_store_register (SIM_DESC sd, int regno, unsigned char *buf, int length) | |
399 | { | |
400 | size_t size; | |
401 | ||
402 | check_desc (sd); | |
403 | ||
404 | if (!check_regno (regno)) | |
405 | return 0; | |
406 | ||
407 | size = reg_size (regno); | |
408 | ||
409 | if (length == size) | |
410 | { | |
411 | DI val = get_le (buf, length); | |
412 | ||
413 | switch (regno) | |
414 | { | |
415 | case m32c_sim_reg_r0_bank0: | |
416 | regs.r[0].r_r0 = val & 0xffff; | |
417 | break; | |
418 | case m32c_sim_reg_r1_bank0: | |
419 | regs.r[0].r_r1 = val & 0xffff; | |
420 | break; | |
421 | case m32c_sim_reg_r2_bank0: | |
422 | regs.r[0].r_r2 = val & 0xffff; | |
423 | break; | |
424 | case m32c_sim_reg_r3_bank0: | |
425 | regs.r[0].r_r3 = val & 0xffff; | |
426 | break; | |
427 | case m32c_sim_reg_a0_bank0: | |
428 | regs.r[0].r_a0 = val & addr_mask; | |
429 | break; | |
430 | case m32c_sim_reg_a1_bank0: | |
431 | regs.r[0].r_a1 = val & addr_mask; | |
432 | break; | |
433 | case m32c_sim_reg_fb_bank0: | |
434 | regs.r[0].r_fb = val & addr_mask; | |
435 | break; | |
436 | case m32c_sim_reg_sb_bank0: | |
437 | regs.r[0].r_sb = val & addr_mask; | |
438 | break; | |
439 | case m32c_sim_reg_r0_bank1: | |
440 | regs.r[1].r_r0 = val & 0xffff; | |
441 | break; | |
442 | case m32c_sim_reg_r1_bank1: | |
443 | regs.r[1].r_r1 = val & 0xffff; | |
444 | break; | |
445 | case m32c_sim_reg_r2_bank1: | |
446 | regs.r[1].r_r2 = val & 0xffff; | |
447 | break; | |
448 | case m32c_sim_reg_r3_bank1: | |
449 | regs.r[1].r_r3 = val & 0xffff; | |
450 | break; | |
451 | case m32c_sim_reg_a0_bank1: | |
452 | regs.r[1].r_a0 = val & addr_mask; | |
453 | break; | |
454 | case m32c_sim_reg_a1_bank1: | |
455 | regs.r[1].r_a1 = val & addr_mask; | |
456 | break; | |
457 | case m32c_sim_reg_fb_bank1: | |
458 | regs.r[1].r_fb = val & addr_mask; | |
459 | break; | |
460 | case m32c_sim_reg_sb_bank1: | |
461 | regs.r[1].r_sb = val & addr_mask; | |
462 | break; | |
463 | ||
464 | case m32c_sim_reg_usp: | |
465 | regs.r_usp = val & addr_mask; | |
466 | break; | |
467 | case m32c_sim_reg_isp: | |
468 | regs.r_isp = val & addr_mask; | |
469 | break; | |
470 | case m32c_sim_reg_pc: | |
471 | regs.r_pc = val & membus_mask; | |
472 | break; | |
473 | case m32c_sim_reg_intb: | |
474 | regs.r_intbl = (val & membus_mask) & 0xffff; | |
475 | regs.r_intbh = (val & membus_mask) >> 16; | |
476 | break; | |
477 | case m32c_sim_reg_flg: | |
478 | regs.r_flags = val & 0xffff; | |
479 | break; | |
480 | ||
481 | /* These registers aren't implemented by the minisim. */ | |
482 | case m32c_sim_reg_svf: | |
483 | case m32c_sim_reg_svp: | |
484 | case m32c_sim_reg_vct: | |
485 | case m32c_sim_reg_dmd0: | |
486 | case m32c_sim_reg_dmd1: | |
487 | case m32c_sim_reg_dct0: | |
488 | case m32c_sim_reg_dct1: | |
489 | case m32c_sim_reg_drc0: | |
490 | case m32c_sim_reg_drc1: | |
491 | case m32c_sim_reg_dma0: | |
492 | case m32c_sim_reg_dma1: | |
493 | case m32c_sim_reg_dsa0: | |
494 | case m32c_sim_reg_dsa1: | |
495 | case m32c_sim_reg_dra0: | |
496 | case m32c_sim_reg_dra1: | |
497 | return 0; | |
498 | ||
499 | default: | |
500 | fprintf (stderr, "m32c minisim: unrecognized register number: %d\n", | |
501 | regno); | |
502 | return -1; | |
503 | } | |
504 | } | |
505 | ||
506 | return size; | |
507 | } | |
508 | ||
509 | void | |
510 | sim_info (SIM_DESC sd, int verbose) | |
511 | { | |
512 | check_desc (sd); | |
513 | ||
514 | printf ("The m32c minisim doesn't collect any statistics.\n"); | |
515 | } | |
516 | ||
517 | static volatile int stop; | |
518 | static enum sim_stop reason; | |
519 | int siggnal; | |
520 | ||
521 | ||
522 | /* Given a signal number used by the M32C bsp (that is, newlib), | |
523 | return a host signal number. (Oddly, the gdb/sim interface uses | |
524 | host signal numbers...) */ | |
525 | int | |
526 | m32c_signal_to_host (int m32c) | |
527 | { | |
528 | switch (m32c) | |
529 | { | |
530 | case 4: | |
531 | #ifdef SIGILL | |
532 | return SIGILL; | |
533 | #else | |
534 | return SIGSEGV; | |
535 | #endif | |
536 | ||
537 | case 5: | |
538 | return SIGTRAP; | |
539 | ||
540 | case 10: | |
541 | #ifdef SIGBUS | |
542 | return SIGBUS; | |
543 | #else | |
544 | return SIGSEGV; | |
545 | #endif | |
546 | ||
547 | case 11: | |
548 | return SIGSEGV; | |
549 | ||
550 | case 24: | |
551 | #ifdef SIGXCPU | |
552 | return SIGXCPU; | |
553 | #else | |
554 | break; | |
555 | #endif | |
556 | ||
557 | case 2: | |
558 | return SIGINT; | |
559 | ||
560 | case 8: | |
561 | #ifdef SIGFPE | |
562 | return SIGFPE; | |
563 | #else | |
564 | break; | |
565 | #endif | |
566 | ||
567 | case 6: | |
568 | return SIGABRT; | |
569 | } | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
574 | ||
575 | /* Take a step return code RC and set up the variables consulted by | |
576 | sim_stop_reason appropriately. */ | |
577 | void | |
578 | handle_step (int rc) | |
579 | { | |
580 | if (M32C_STEPPED (rc) || M32C_HIT_BREAK (rc)) | |
581 | { | |
582 | reason = sim_stopped; | |
583 | siggnal = TARGET_SIGNAL_TRAP; | |
584 | } | |
585 | else if (M32C_STOPPED (rc)) | |
586 | { | |
587 | reason = sim_stopped; | |
588 | siggnal = m32c_signal_to_host (M32C_STOP_SIG (rc)); | |
589 | } | |
590 | else | |
591 | { | |
592 | assert (M32C_EXITED (rc)); | |
593 | reason = sim_exited; | |
594 | siggnal = M32C_EXIT_STATUS (rc); | |
595 | } | |
596 | } | |
597 | ||
598 | ||
599 | void | |
600 | sim_resume (SIM_DESC sd, int step, int sig_to_deliver) | |
601 | { | |
602 | check_desc (sd); | |
603 | ||
604 | if (sig_to_deliver != 0) | |
605 | { | |
606 | fprintf (stderr, | |
607 | "Warning: the m32c minisim does not implement " | |
608 | "signal delivery yet.\n" "Resuming with no signal.\n"); | |
609 | } | |
610 | ||
611 | if (step) | |
3877a145 DD |
612 | { |
613 | handle_step (decode_opcode ()); | |
614 | #ifdef TIMER_A | |
615 | update_timer_a (); | |
616 | #endif | |
617 | } | |
d45a4bef JB |
618 | else |
619 | { | |
620 | /* We don't clear 'stop' here, because then we would miss | |
621 | interrupts that arrived on the way here. Instead, we clear | |
622 | the flag in sim_stop_reason, after GDB has disabled the | |
623 | interrupt signal handler. */ | |
624 | for (;;) | |
625 | { | |
626 | if (stop) | |
627 | { | |
628 | stop = 0; | |
629 | reason = sim_stopped; | |
630 | siggnal = TARGET_SIGNAL_INT; | |
631 | break; | |
632 | } | |
633 | ||
634 | int rc = decode_opcode (); | |
3877a145 DD |
635 | #ifdef TIMER_A |
636 | update_timer_a (); | |
637 | #endif | |
d45a4bef JB |
638 | |
639 | if (!M32C_STEPPED (rc)) | |
640 | { | |
641 | handle_step (rc); | |
642 | break; | |
643 | } | |
644 | } | |
645 | } | |
3877a145 | 646 | m32c_sim_restore_console (); |
d45a4bef JB |
647 | } |
648 | ||
649 | int | |
650 | sim_stop (SIM_DESC sd) | |
651 | { | |
652 | stop = 1; | |
653 | ||
654 | return 1; | |
655 | } | |
656 | ||
657 | void | |
658 | sim_stop_reason (SIM_DESC sd, enum sim_stop *reason_p, int *sigrc_p) | |
659 | { | |
660 | check_desc (sd); | |
661 | ||
662 | *reason_p = reason; | |
663 | *sigrc_p = siggnal; | |
664 | } | |
665 | ||
666 | void | |
667 | sim_do_command (SIM_DESC sd, char *cmd) | |
668 | { | |
669 | check_desc (sd); | |
670 | ||
671 | char *p = cmd; | |
672 | ||
673 | /* Skip leading whitespace. */ | |
674 | while (isspace (*p)) | |
675 | p++; | |
676 | ||
677 | /* Find the extent of the command word. */ | |
678 | for (p = cmd; *p; p++) | |
679 | if (isspace (*p)) | |
680 | break; | |
681 | ||
682 | /* Null-terminate the command word, and record the start of any | |
683 | further arguments. */ | |
684 | char *args; | |
685 | if (*p) | |
686 | { | |
687 | *p = '\0'; | |
688 | args = p + 1; | |
689 | while (isspace (*args)) | |
690 | args++; | |
691 | } | |
692 | else | |
693 | args = p; | |
694 | ||
695 | if (strcmp (cmd, "trace") == 0) | |
696 | { | |
697 | if (strcmp (args, "on") == 0) | |
698 | trace = 1; | |
699 | else if (strcmp (args, "off") == 0) | |
700 | trace = 0; | |
701 | else | |
702 | printf ("The 'sim trace' command expects 'on' or 'off' " | |
703 | "as an argument.\n"); | |
704 | } | |
705 | else if (strcmp (cmd, "verbose") == 0) | |
706 | { | |
707 | if (strcmp (args, "on") == 0) | |
708 | verbose = 1; | |
709 | else if (strcmp (args, "off") == 0) | |
710 | verbose = 0; | |
711 | else | |
712 | printf ("The 'sim verbose' command expects 'on' or 'off'" | |
713 | " as an argument.\n"); | |
714 | } | |
715 | else | |
716 | printf ("The 'sim' command expects either 'trace' or 'verbose'" | |
717 | " as a subcommand.\n"); | |
718 | } |