Commit | Line | Data |
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5905161c RP |
1 | /* Remote debugging interface for Motorola's MVME187BUG monitor, an embedded |
2 | monitor for the m88k. | |
3 | ||
4 | Copyright 1992, 1993 Free Software Foundation, Inc. | |
5 | Contributed by Cygnus Support. Written by K. Richard Pixley. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
22 | ||
23 | #include "defs.h" | |
24 | #include "inferior.h" | |
25 | #include "wait.h" | |
26 | #include "value.h" | |
be58e87e | 27 | |
5905161c RP |
28 | #include <string.h> |
29 | #include <ctype.h> | |
30 | #include <fcntl.h> | |
31 | #include <signal.h> | |
32 | #include <setjmp.h> | |
33 | #include <errno.h> | |
be58e87e | 34 | |
5905161c RP |
35 | #include "terminal.h" |
36 | #include "target.h" | |
37 | #include "gdbcore.h" | |
38 | #include "serial.h" | |
be58e87e RP |
39 | #include "gdbcmd.h" |
40 | ||
41 | extern int sleep(); | |
42 | extern int remque(); | |
43 | extern int insque(); | |
5905161c RP |
44 | |
45 | /* External data declarations */ | |
46 | extern int stop_soon_quietly; /* for wait_for_inferior */ | |
47 | ||
48 | /* Forward data declarations */ | |
ae87844d | 49 | extern struct target_ops bug_ops; /* Forward declaration */ |
5905161c RP |
50 | |
51 | /* Forward function declarations */ | |
5905161c RP |
52 | static void bug_close (); |
53 | static int bug_clear_breakpoints (); | |
be58e87e RP |
54 | static void bug_write_cr(); |
55 | ||
56 | #if __STDC__ == 1 | |
57 | ||
58 | static int bug_read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len); | |
59 | static int bug_write_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len); | |
60 | ||
61 | #else | |
62 | ||
63 | static int bug_read_inferior_memory (); | |
64 | static int bug_write_inferior_memory (); | |
65 | ||
66 | #endif /* not __STDC__ */ | |
67 | ||
68 | /* To be silent, or to loudly echo all input and output to and from | |
69 | the target. */ | |
5905161c RP |
70 | |
71 | static int quiet = 1; | |
72 | ||
be58e87e RP |
73 | /* This is the serial descriptor to our target. */ |
74 | ||
75 | static serial_t desc = NULL; | |
76 | ||
77 | /* This variable is somewhat arbitrary. It's here so that it can be | |
78 | set from within a running gdb. */ | |
79 | ||
80 | static int srec_max_retries = 3; | |
81 | ||
82 | /* Each S-record download to the target consists of an S0 header | |
83 | record, some number of S3 data records, and one S7 termination | |
84 | record. I call this download a "frame". Srec_frame says how many | |
85 | bytes will be represented in each frame. */ | |
86 | ||
87 | static int srec_frame = 160; | |
88 | ||
89 | /* This variable determines how many bytes will be represented in each | |
90 | S3 s-record. */ | |
91 | ||
92 | static int srec_bytes = 40; | |
93 | ||
94 | /* At one point it appeared to me as though the bug monitor could not | |
95 | really be expected to receive two sequential characters at 9600 | |
96 | baud reliably. Echo-pacing is an attempt to force data across the | |
97 | line even in this condition. Specifically, in echo-pace mode, each | |
98 | character is sent one at a time and we look for the echo before | |
99 | sending the next. This is excruciatingly slow. */ | |
5905161c | 100 | |
be58e87e RP |
101 | static int srec_echo_pace = 0; |
102 | ||
103 | /* How long to wait after an srec for a possible error message. | |
104 | Similar to the above, I tried sleeping after sending each S3 record | |
105 | in hopes that I might actually see error messages from the bug | |
106 | monitor. This might actually work if we were to use sleep | |
107 | intervals smaller than 1 second. */ | |
108 | ||
109 | static int srec_sleep = 0; | |
110 | ||
111 | /* Every srec_noise records, flub the checksum. This is a debugging | |
112 | feature. Set the variable to something other than 1 in order to | |
113 | inject *deliberate* checksum errors. One might do this if one | |
114 | wanted to test error handling and recovery. */ | |
115 | ||
116 | static int srec_noise = 0; | |
5905161c RP |
117 | |
118 | /***********************************************************************/ | |
119 | /* Caching stuff stolen from remote-nindy.c */ | |
120 | ||
121 | /* The data cache records all the data read from the remote machine | |
122 | since the last time it stopped. | |
123 | ||
124 | Each cache block holds LINE_SIZE bytes of data | |
125 | starting at a multiple-of-LINE_SIZE address. */ | |
126 | ||
127 | #define LINE_SIZE_POWER 4 | |
128 | #define LINE_SIZE (1<<LINE_SIZE_POWER) /* eg 1<<3 == 8 */ | |
129 | #define LINE_SIZE_MASK ((LINE_SIZE-1)) /* eg 7*2+1= 111*/ | |
130 | #define DCACHE_SIZE 64 /* Number of cache blocks */ | |
131 | #define XFORM(x) ((x&LINE_SIZE_MASK)>>2) | |
132 | struct dcache_block | |
133 | { | |
134 | struct dcache_block *next, *last; | |
135 | unsigned int addr; /* Address for which data is recorded. */ | |
136 | int data[LINE_SIZE / sizeof (int)]; | |
137 | }; | |
138 | ||
139 | struct dcache_block dcache_free, dcache_valid; | |
140 | ||
141 | /* Free all the data cache blocks, thus discarding all cached data. */ | |
142 | static | |
143 | void | |
144 | dcache_flush () | |
145 | { | |
146 | register struct dcache_block *db; | |
147 | ||
148 | while ((db = dcache_valid.next) != &dcache_valid) | |
149 | { | |
150 | remque (db); | |
151 | insque (db, &dcache_free); | |
152 | } | |
153 | } | |
154 | ||
155 | /* | |
156 | * If addr is present in the dcache, return the address of the block | |
157 | * containing it. | |
158 | */ | |
159 | static | |
160 | struct dcache_block * | |
161 | dcache_hit (addr) | |
162 | unsigned int addr; | |
163 | { | |
164 | register struct dcache_block *db; | |
165 | ||
166 | if (addr & 3) | |
167 | abort (); | |
168 | ||
169 | /* Search all cache blocks for one that is at this address. */ | |
170 | db = dcache_valid.next; | |
171 | while (db != &dcache_valid) | |
172 | { | |
173 | if ((addr & ~LINE_SIZE_MASK) == db->addr) | |
174 | return db; | |
175 | db = db->next; | |
176 | } | |
177 | return NULL; | |
178 | } | |
179 | ||
180 | /* Return the int data at address ADDR in dcache block DC. */ | |
181 | static | |
182 | int | |
183 | dcache_value (db, addr) | |
184 | struct dcache_block *db; | |
185 | unsigned int addr; | |
186 | { | |
187 | if (addr & 3) | |
188 | abort (); | |
189 | return (db->data[XFORM (addr)]); | |
190 | } | |
191 | ||
192 | /* Get a free cache block, put or keep it on the valid list, | |
193 | and return its address. The caller should store into the block | |
194 | the address and data that it describes, then remque it from the | |
195 | free list and insert it into the valid list. This procedure | |
196 | prevents errors from creeping in if a ninMemGet is interrupted | |
197 | (which used to put garbage blocks in the valid list...). */ | |
198 | static | |
199 | struct dcache_block * | |
200 | dcache_alloc () | |
201 | { | |
202 | register struct dcache_block *db; | |
203 | ||
204 | if ((db = dcache_free.next) == &dcache_free) | |
205 | { | |
206 | /* If we can't get one from the free list, take last valid and put | |
207 | it on the free list. */ | |
208 | db = dcache_valid.last; | |
209 | remque (db); | |
210 | insque (db, &dcache_free); | |
211 | } | |
212 | ||
213 | remque (db); | |
214 | insque (db, &dcache_valid); | |
215 | return (db); | |
216 | } | |
217 | ||
218 | /* Return the contents of the word at address ADDR in the remote machine, | |
219 | using the data cache. */ | |
220 | static | |
221 | int | |
222 | dcache_fetch (addr) | |
223 | CORE_ADDR addr; | |
224 | { | |
225 | register struct dcache_block *db; | |
226 | ||
227 | db = dcache_hit (addr); | |
228 | if (db == 0) | |
229 | { | |
230 | db = dcache_alloc (); | |
231 | immediate_quit++; | |
232 | bug_read_inferior_memory (addr & ~LINE_SIZE_MASK, (unsigned char *) db->data, LINE_SIZE); | |
233 | immediate_quit--; | |
234 | db->addr = addr & ~LINE_SIZE_MASK; | |
235 | remque (db); /* Off the free list */ | |
236 | insque (db, &dcache_valid); /* On the valid list */ | |
237 | } | |
238 | return (dcache_value (db, addr)); | |
239 | } | |
240 | ||
241 | /* Write the word at ADDR both in the data cache and in the remote machine. */ | |
242 | static void | |
243 | dcache_poke (addr, data) | |
244 | CORE_ADDR addr; | |
245 | int data; | |
246 | { | |
247 | register struct dcache_block *db; | |
248 | ||
249 | /* First make sure the word is IN the cache. DB is its cache block. */ | |
250 | db = dcache_hit (addr); | |
251 | if (db == 0) | |
252 | { | |
253 | db = dcache_alloc (); | |
254 | immediate_quit++; | |
255 | bug_write_inferior_memory (addr & ~LINE_SIZE_MASK, (unsigned char *) db->data, LINE_SIZE); | |
256 | immediate_quit--; | |
257 | db->addr = addr & ~LINE_SIZE_MASK; | |
258 | remque (db); /* Off the free list */ | |
259 | insque (db, &dcache_valid); /* On the valid list */ | |
260 | } | |
261 | ||
262 | /* Modify the word in the cache. */ | |
263 | db->data[XFORM (addr)] = data; | |
264 | ||
265 | /* Send the changed word. */ | |
266 | immediate_quit++; | |
267 | bug_write_inferior_memory (addr, (unsigned char *) &data, 4); | |
268 | immediate_quit--; | |
269 | } | |
270 | ||
271 | /* The cache itself. */ | |
272 | struct dcache_block the_cache[DCACHE_SIZE]; | |
273 | ||
274 | /* Initialize the data cache. */ | |
275 | static void | |
276 | dcache_init () | |
277 | { | |
278 | register i; | |
279 | register struct dcache_block *db; | |
280 | ||
281 | db = the_cache; | |
282 | dcache_free.next = dcache_free.last = &dcache_free; | |
283 | dcache_valid.next = dcache_valid.last = &dcache_valid; | |
284 | for (i = 0; i < DCACHE_SIZE; i++, db++) | |
285 | insque (db, &dcache_free); | |
286 | } | |
287 | ||
288 | /*********************************************************************** | |
289 | * I/O stuff stolen from remote-eb.c | |
290 | ***********************************************************************/ | |
291 | ||
be58e87e RP |
292 | /* with a timeout of 2, we time out waiting for the prompt after an |
293 | s-record dump. */ | |
294 | static int timeout = 4; | |
5905161c RP |
295 | |
296 | static const char *dev_name; | |
297 | ||
298 | /* Descriptor for I/O to remote machine. Initialize it to -1 so that | |
299 | bug_open knows that we don't have a file open when the program | |
300 | starts. */ | |
301 | ||
be58e87e RP |
302 | static int is_open = 0; |
303 | static int | |
5905161c RP |
304 | check_open () |
305 | { | |
306 | if (!is_open) | |
307 | { | |
308 | error ("remote device not open"); | |
309 | } | |
be58e87e RP |
310 | |
311 | return(1); | |
5905161c RP |
312 | } |
313 | ||
314 | #define ON 1 | |
315 | #define OFF 0 | |
316 | ||
317 | /* Read a character from the remote system, doing all the fancy | |
318 | timeout stuff. */ | |
319 | static int | |
320 | readchar () | |
321 | { | |
322 | int buf; | |
323 | ||
324 | buf = SERIAL_READCHAR (desc, timeout); | |
325 | ||
326 | if (buf == SERIAL_TIMEOUT) | |
327 | error ("Timeout reading from remote system."); | |
328 | ||
329 | if (!quiet) | |
330 | printf ("%c", buf); | |
331 | ||
332 | return buf & 0x7f; | |
333 | } | |
334 | ||
335 | static int | |
336 | readchar_nofail () | |
337 | { | |
338 | int buf; | |
339 | ||
340 | buf = SERIAL_READCHAR (desc, timeout); | |
341 | if (buf == SERIAL_TIMEOUT) | |
342 | buf = 0; | |
343 | if (!quiet) | |
be58e87e RP |
344 | if (buf) |
345 | printf ("%c", buf); | |
346 | else | |
347 | printf ("<timeout>"); | |
5905161c RP |
348 | |
349 | return buf & 0x7f; | |
350 | ||
351 | } | |
352 | ||
be58e87e RP |
353 | static int |
354 | pollchar() | |
355 | { | |
356 | int buf; | |
357 | ||
358 | buf = SERIAL_READCHAR (desc, 0); | |
359 | if (buf == SERIAL_TIMEOUT) | |
360 | buf = 0; | |
361 | if (!quiet) | |
362 | if (buf) | |
363 | printf ("%c", buf); | |
364 | else | |
365 | printf ("<empty poll>"); | |
366 | ||
367 | return buf & 0x7f; | |
368 | } | |
369 | ||
5905161c RP |
370 | /* Keep discarding input from the remote system, until STRING is found. |
371 | Let the user break out immediately. */ | |
372 | static void | |
373 | expect (string) | |
374 | char *string; | |
375 | { | |
376 | char *p = string; | |
377 | ||
378 | immediate_quit = 1; | |
be58e87e | 379 | for (;;) |
5905161c RP |
380 | { |
381 | if (readchar () == *p) | |
382 | { | |
383 | p++; | |
384 | if (*p == '\0') | |
385 | { | |
386 | immediate_quit = 0; | |
387 | return; | |
388 | } | |
389 | } | |
390 | else | |
391 | p = string; | |
392 | } | |
393 | } | |
394 | ||
395 | /* Keep discarding input until we see the bug prompt. | |
396 | ||
397 | The convention for dealing with the prompt is that you | |
398 | o give your command | |
399 | o *then* wait for the prompt. | |
400 | ||
401 | Thus the last thing that a procedure does with the serial line | |
402 | will be an expect_prompt(). Exception: bug_resume does not | |
403 | wait for the prompt, because the terminal is being handed over | |
404 | to the inferior. However, the next thing which happens after that | |
405 | is a bug_wait which does wait for the prompt. | |
406 | Note that this includes abnormal exit, e.g. error(). This is | |
407 | necessary to prevent getting into states from which we can't | |
408 | recover. */ | |
409 | static void | |
410 | expect_prompt () | |
411 | { | |
412 | expect ("Bug>"); | |
413 | } | |
414 | ||
415 | /* Get a hex digit from the remote system & return its value. | |
416 | If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */ | |
417 | static int | |
418 | get_hex_digit (ignore_space) | |
419 | int ignore_space; | |
420 | { | |
421 | int ch; | |
422 | ||
be58e87e | 423 | for (;;) |
5905161c RP |
424 | { |
425 | ch = readchar (); | |
426 | if (ch >= '0' && ch <= '9') | |
427 | return ch - '0'; | |
428 | else if (ch >= 'A' && ch <= 'F') | |
429 | return ch - 'A' + 10; | |
430 | else if (ch >= 'a' && ch <= 'f') | |
431 | return ch - 'a' + 10; | |
be58e87e | 432 | else if (ch != ' ' || !ignore_space) |
5905161c RP |
433 | { |
434 | expect_prompt (); | |
435 | error ("Invalid hex digit from remote system."); | |
436 | } | |
437 | } | |
438 | } | |
439 | ||
440 | /* Get a byte from bug_desc and put it in *BYT. Accept any number | |
441 | leading spaces. */ | |
442 | static void | |
443 | get_hex_byte (byt) | |
444 | char *byt; | |
445 | { | |
446 | int val; | |
447 | ||
448 | val = get_hex_digit (1) << 4; | |
449 | val |= get_hex_digit (0); | |
450 | *byt = val; | |
451 | } | |
452 | ||
453 | /* Read a 32-bit hex word from the bug, preceded by a space */ | |
454 | static long | |
455 | get_hex_word () | |
456 | { | |
457 | long val; | |
458 | int j; | |
459 | ||
460 | val = 0; | |
461 | for (j = 0; j < 8; j++) | |
462 | val = (val << 4) + get_hex_digit (j == 0); | |
463 | return val; | |
464 | } | |
465 | ||
466 | /* Called when SIGALRM signal sent due to alarm() timeout. */ | |
467 | ||
468 | /* Number of SIGTRAPs we need to simulate. That is, the next | |
469 | NEED_ARTIFICIAL_TRAP calls to bug_wait should just return | |
470 | SIGTRAP without actually waiting for anything. */ | |
471 | ||
472 | static int need_artificial_trap = 0; | |
473 | ||
474 | void | |
475 | bug_kill (arg, from_tty) | |
476 | char *arg; | |
477 | int from_tty; | |
478 | { | |
479 | ||
480 | } | |
481 | ||
482 | /* | |
483 | * Download a file specified in 'args', to the bug. | |
484 | */ | |
be58e87e | 485 | |
5905161c RP |
486 | static void |
487 | bug_load (args, fromtty) | |
488 | char *args; | |
489 | int fromtty; | |
490 | { | |
491 | bfd *abfd; | |
492 | asection *s; | |
5905161c RP |
493 | char buffer[1024]; |
494 | ||
495 | check_open (); | |
496 | ||
497 | dcache_flush (); | |
498 | inferior_pid = 0; | |
499 | abfd = bfd_openr (args, 0); | |
500 | if (!abfd) | |
501 | { | |
502 | printf_filtered ("Unable to open file %s\n", args); | |
503 | return; | |
504 | } | |
505 | ||
506 | if (bfd_check_format (abfd, bfd_object) == 0) | |
507 | { | |
508 | printf_filtered ("File is not an object file\n"); | |
509 | return; | |
510 | } | |
511 | ||
512 | s = abfd->sections; | |
513 | while (s != (asection *) NULL) | |
514 | { | |
515 | if (s->flags & SEC_LOAD) | |
516 | { | |
517 | int i; | |
518 | ||
be58e87e | 519 | char *buffer = xmalloc (srec_frame); |
5905161c RP |
520 | |
521 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size); | |
be58e87e RP |
522 | fflush (stdout); |
523 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
5905161c | 524 | { |
be58e87e RP |
525 | if (srec_frame > s->_raw_size - i) |
526 | srec_frame = s->_raw_size - i; | |
5905161c | 527 | |
be58e87e RP |
528 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); |
529 | bug_write_inferior_memory (s->vma + i, buffer, srec_frame); | |
5905161c RP |
530 | printf_filtered ("*"); |
531 | fflush (stdout); | |
532 | } | |
533 | printf_filtered ("\n"); | |
534 | free (buffer); | |
535 | } | |
536 | s = s->next; | |
537 | } | |
be58e87e | 538 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); |
5905161c RP |
539 | bug_write_cr (buffer); |
540 | expect_prompt (); | |
541 | } | |
542 | ||
543 | /* This is called not only when we first attach, but also when the | |
544 | user types "run" after having attached. */ | |
545 | void | |
546 | bug_create_inferior (execfile, args, env) | |
547 | char *execfile; | |
548 | char *args; | |
549 | char **env; | |
550 | { | |
551 | int entry_pt; | |
5905161c RP |
552 | |
553 | if (args && *args) | |
554 | error ("Can't pass arguments to remote bug process."); | |
555 | ||
556 | if (execfile == 0 || exec_bfd == 0) | |
557 | error ("No exec file specified"); | |
558 | ||
559 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
560 | check_open (); | |
561 | ||
562 | bug_kill (NULL, NULL); | |
563 | bug_clear_breakpoints (); | |
564 | init_wait_for_inferior (); | |
565 | bug_write_cr (""); | |
566 | expect_prompt (); | |
567 | ||
568 | insert_breakpoints (); /* Needed to get correct instruction in cache */ | |
569 | proceed (entry_pt, -1, 0); | |
570 | } | |
571 | ||
5905161c RP |
572 | static char * |
573 | get_word (p) | |
574 | char **p; | |
575 | { | |
576 | char *s = *p; | |
577 | char *word; | |
578 | char *copy; | |
579 | size_t len; | |
580 | ||
581 | while (isspace (*s)) | |
582 | s++; | |
583 | ||
584 | word = s; | |
585 | ||
586 | len = 0; | |
587 | ||
588 | while (*s && !isspace (*s)) | |
589 | { | |
590 | s++; | |
591 | len++; | |
592 | ||
593 | } | |
594 | copy = xmalloc (len + 1); | |
595 | memcpy (copy, word, len); | |
596 | copy[len] = 0; | |
597 | *p = s; | |
598 | return copy; | |
599 | } | |
600 | ||
601 | static int baudrate = 9600; | |
602 | ||
5905161c RP |
603 | static void |
604 | bug_open (name, from_tty) | |
605 | char *name; | |
606 | int from_tty; | |
607 | { | |
5905161c RP |
608 | push_target (&bug_ops); |
609 | ||
610 | if (name == 0) | |
611 | { | |
612 | name = ""; | |
613 | } | |
614 | if (is_open) | |
615 | bug_close (0); | |
616 | dev_name = strdup (name); | |
617 | ||
618 | if (!(desc = SERIAL_OPEN (dev_name))) | |
619 | perror_with_name ((char *) dev_name); | |
620 | ||
621 | SERIAL_RAW (desc); | |
622 | is_open = 1; | |
623 | ||
624 | dcache_init (); | |
625 | ||
626 | /* Hello? Are you there? */ | |
627 | SERIAL_WRITE (desc, "\r", 1); | |
628 | expect_prompt (); | |
629 | ||
630 | /* Clear any break points */ | |
631 | bug_clear_breakpoints (); | |
632 | ||
633 | printf_filtered ("Connected to remote 187bug system.\n"); | |
634 | } | |
635 | ||
636 | /* Close out all files and local state before this target loses control. */ | |
637 | ||
638 | static void | |
639 | bug_close (quitting) | |
640 | int quitting; | |
641 | { | |
642 | /* Clear any break points */ | |
643 | bug_clear_breakpoints (); | |
644 | ||
645 | if (is_open) | |
646 | SERIAL_CLOSE (desc); | |
647 | ||
648 | is_open = 0; | |
649 | } | |
650 | ||
651 | /* Terminate the open connection to the remote debugger. | |
652 | Use this when you want to detach and do something else | |
653 | with your gdb. */ | |
654 | void | |
655 | bug_detach (args, from_tty) | |
656 | char *args; | |
657 | int from_tty; | |
658 | { | |
659 | if (is_open) | |
660 | bug_clear_breakpoints (); | |
661 | ||
662 | pop_target (); /* calls bug_close to do the real work */ | |
663 | ||
664 | if (from_tty) | |
665 | printf_filtered ("Ending remote %s debugging\n", target_shortname); | |
666 | } | |
667 | ||
668 | /* Tell the remote machine to resume. */ | |
669 | ||
670 | void | |
be58e87e RP |
671 | bug_resume (pid, step, sig) |
672 | int pid, step, sig; | |
5905161c RP |
673 | { |
674 | dcache_flush (); | |
675 | ||
676 | if (step) | |
677 | { | |
678 | bug_write_cr("t"); | |
679 | ||
680 | /* Force the next bug_wait to return a trap. Not doing anything | |
681 | about I/O from the target means that the user has to type | |
682 | "continue" to see any. FIXME, this should be fixed. */ | |
683 | need_artificial_trap = 1; | |
684 | } | |
685 | else | |
686 | bug_write_cr ("g"); | |
687 | ||
688 | return; | |
689 | } | |
690 | ||
be58e87e RP |
691 | static int |
692 | double_scan (a, b) | |
693 | char *a, *b; | |
5905161c RP |
694 | { |
695 | /* Strings to look for. '?' means match any single character. | |
696 | Note that with the algorithm we use, the initial character | |
697 | of the string cannot recur in the string, or we will not | |
698 | find some cases of the string in the input. */ | |
699 | ||
be58e87e RP |
700 | char *pa = a; |
701 | char *pb = b; | |
5905161c RP |
702 | |
703 | /* Large enough for either sizeof (bpt) or sizeof (exitmsg) chars. */ | |
704 | char swallowed[50]; | |
705 | ||
706 | /* Current position in swallowed. */ | |
707 | char *swallowed_p = swallowed; | |
708 | ||
be58e87e | 709 | int ch = readchar(); |
5905161c | 710 | int ch_handled; |
5905161c RP |
711 | int swallowed_cr = 0; |
712 | ||
be58e87e | 713 | for (;;) |
5905161c | 714 | { |
be58e87e | 715 | QUIT; /* Let user quit and leave process running */ |
5905161c | 716 | ch_handled = 0; |
be58e87e | 717 | if (ch == *pa) |
5905161c | 718 | { |
be58e87e RP |
719 | pa++; |
720 | if (*pa == '\0') | |
5905161c RP |
721 | break; |
722 | ch_handled = 1; | |
723 | ||
724 | *swallowed_p++ = ch; | |
725 | } | |
726 | else | |
be58e87e RP |
727 | pa = a; |
728 | ||
729 | if (ch == *pb || *pb == '?') | |
5905161c | 730 | { |
be58e87e RP |
731 | pb++; |
732 | if (*pb == '\0') | |
5905161c RP |
733 | break; |
734 | ||
735 | if (!ch_handled) | |
736 | *swallowed_p++ = ch; | |
737 | ch_handled = 1; | |
738 | } | |
739 | else | |
be58e87e | 740 | pb = b; |
5905161c RP |
741 | |
742 | if (!ch_handled) | |
743 | { | |
744 | char *p; | |
745 | ||
746 | /* Print out any characters which have been swallowed. */ | |
747 | for (p = swallowed; p < swallowed_p; ++p) | |
748 | putc (*p, stdout); | |
749 | swallowed_p = swallowed; | |
750 | ||
751 | if ((ch != '\r' && ch != '\n') || swallowed_cr > 10) | |
752 | { | |
753 | putc (ch, stdout); | |
754 | swallowed_cr = 10; | |
755 | } | |
756 | swallowed_cr++; | |
757 | ||
758 | } | |
759 | ||
760 | ch = readchar (); | |
761 | } | |
be58e87e RP |
762 | |
763 | return(*pa == '\0'); | |
764 | } | |
765 | ||
766 | /* Wait until the remote machine stops, then return, | |
767 | storing status in STATUS just as `wait' would. */ | |
768 | ||
769 | int | |
770 | bug_wait (status) | |
771 | WAITTYPE *status; | |
772 | { | |
773 | int old_timeout = timeout; | |
774 | int old_immediate_quit = immediate_quit; | |
775 | ||
776 | WSETEXIT ((*status), 0); | |
777 | ||
778 | if (need_artificial_trap != 0) | |
5905161c RP |
779 | { |
780 | WSETSTOP ((*status), SIGTRAP); | |
be58e87e RP |
781 | need_artificial_trap--; |
782 | /* user output from the target can be discarded here. (?) */ | |
783 | expect_prompt(); | |
784 | return 0; | |
5905161c | 785 | } |
be58e87e RP |
786 | |
787 | /* read off leftovers from resume */ | |
788 | expect("Effective address: "); | |
789 | (void) get_hex_word(); | |
790 | expect ("\r\n"); | |
791 | ||
792 | timeout = -1; /* Don't time out -- user program is running. */ | |
793 | immediate_quit = 1; /* Helps ability to QUIT */ | |
794 | ||
795 | if (double_scan("At Breakpoint", "8???-Bug>")) | |
5905161c | 796 | { |
be58e87e RP |
797 | /* breakpoint case */ |
798 | WSETSTOP ((*status), SIGTRAP); | |
799 | expect_prompt (); | |
5905161c | 800 | } |
be58e87e RP |
801 | else /* exit case */ |
802 | WSETEXIT ((*status), 0); | |
803 | ||
5905161c RP |
804 | |
805 | timeout = old_timeout; | |
806 | immediate_quit = old_immediate_quit; | |
807 | return 0; | |
808 | } | |
809 | ||
810 | /* Return the name of register number REGNO | |
811 | in the form input and output by bug. | |
812 | ||
813 | Returns a pointer to a static buffer containing the answer. */ | |
814 | static char * | |
815 | get_reg_name (regno) | |
816 | int regno; | |
817 | { | |
818 | static char *rn[] = { | |
819 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", | |
820 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
821 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
822 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
823 | ||
824 | /* these get confusing because we omit a few and switch some ordering around. */ | |
825 | ||
826 | "cr01", /* 32 = psr */ | |
827 | "fcr62", /* 33 = fpsr*/ | |
828 | "fcr63", /* 34 = fpcr */ | |
be58e87e RP |
829 | "ip", /* this is something of a cheat. */ |
830 | /* 35 = sxip */ | |
5905161c RP |
831 | "cr05", /* 36 = snip */ |
832 | "cr06", /* 37 = sfip */ | |
833 | }; | |
834 | ||
835 | return rn[regno]; | |
836 | } | |
837 | ||
838 | static int | |
5905161c RP |
839 | bug_write (a, l) |
840 | char *a; | |
be58e87e | 841 | int l; |
5905161c RP |
842 | { |
843 | int i; | |
844 | ||
845 | SERIAL_WRITE (desc, a, l); | |
846 | ||
847 | if (!quiet) | |
848 | for (i = 0; i < l; i++) | |
849 | { | |
850 | printf ("%c", a[i]); | |
851 | } | |
be58e87e RP |
852 | |
853 | return(0); | |
5905161c RP |
854 | } |
855 | ||
be58e87e | 856 | static void |
5905161c RP |
857 | bug_write_cr (s) |
858 | char *s; | |
859 | { | |
860 | bug_write (s, strlen (s)); | |
861 | bug_write ("\r", 1); | |
be58e87e RP |
862 | return; |
863 | } | |
864 | ||
865 | /* Read from remote while the input matches STRING. Return zero on | |
866 | success, -1 on failure. */ | |
867 | ||
868 | static int | |
869 | bug_scan (s) | |
870 | char *s; | |
871 | { | |
872 | int c; | |
873 | ||
874 | while (*s) | |
875 | { | |
876 | c = readchar(); | |
877 | if (c != *s++) | |
878 | { | |
879 | fflush(stdout); | |
880 | printf("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
881 | return(-1); | |
882 | } | |
883 | } | |
884 | ||
885 | return(0); | |
886 | } | |
887 | ||
888 | static int | |
889 | bug_srec_write_cr (s) | |
890 | char *s; | |
891 | { | |
892 | char *p = s; | |
893 | ||
894 | if (srec_echo_pace) | |
895 | for (p = s; *p; ++p) | |
896 | { | |
897 | if (!quiet) | |
898 | printf ("%c", *p); | |
899 | ||
900 | do | |
901 | SERIAL_WRITE(desc, p, 1); | |
902 | while (readchar_nofail() != *p); | |
903 | } | |
904 | else | |
905 | { | |
906 | bug_write_cr (s); | |
907 | /* return(bug_scan (s) || bug_scan ("\n")); */ | |
908 | } | |
909 | ||
910 | return(0); | |
5905161c RP |
911 | } |
912 | ||
913 | /* Store register REGNO, or all if REGNO == -1. */ | |
914 | ||
915 | static void | |
916 | bug_fetch_register(regno) | |
917 | int regno; | |
918 | { | |
919 | REGISTER_TYPE regval; | |
920 | check_open(); | |
921 | ||
922 | if (regno == -1) | |
923 | { | |
924 | int i; | |
925 | ||
926 | for (i = 0; i < NUM_REGS; ++i) | |
927 | bug_fetch_register(i); | |
928 | } | |
929 | else | |
930 | { | |
931 | bug_write("rs ", 3); | |
932 | bug_write_cr(get_reg_name(regno)); | |
933 | expect("="); | |
934 | regval = get_hex_word(); | |
935 | expect_prompt(); | |
936 | ||
937 | /* the following registers contain flag bits in the lower to bit slots. | |
938 | Mask them off */ | |
939 | if (regno == PC_REGNUM /* aka sxip */ | |
940 | || regno == NPC_REGNUM /* aka snip */ | |
941 | || regno == SFIP_REGNUM) /* aka sfip */ | |
942 | regval &= ~0x3; | |
943 | ||
944 | supply_register(regno, (char *) ®val); | |
945 | } | |
946 | ||
947 | return; | |
948 | } | |
949 | ||
950 | /* Store register REGNO, or all if REGNO == -1. */ | |
951 | ||
952 | static void | |
953 | bug_store_register (regno) | |
954 | int regno; | |
955 | { | |
5905161c RP |
956 | char buffer[1024]; |
957 | check_open(); | |
958 | ||
959 | if (regno == -1) | |
960 | { | |
961 | int i; | |
962 | ||
963 | for (i = 0; i < NUM_REGS; ++i) | |
964 | bug_store_register(i); | |
965 | } | |
966 | else | |
967 | { | |
968 | char *regname; | |
969 | ||
be58e87e | 970 | regname = (get_reg_name(regno)); |
5905161c RP |
971 | |
972 | sprintf(buffer, "rs %s %08x", | |
973 | regname, | |
974 | read_register(regno)); | |
975 | ||
976 | bug_write_cr(buffer); | |
977 | expect_prompt(); | |
978 | } | |
979 | ||
980 | return; | |
981 | } | |
982 | ||
983 | /* Get ready to modify the registers array. On machines which store | |
984 | individual registers, this doesn't need to do anything. On machines | |
985 | which store all the registers in one fell swoop, this makes sure | |
986 | that registers contains all the registers from the program being | |
987 | debugged. */ | |
988 | ||
989 | void | |
990 | bug_prepare_to_store () | |
991 | { | |
992 | /* Do nothing, since we can store individual regs */ | |
993 | } | |
994 | ||
5905161c RP |
995 | /* Read a word from remote address ADDR and return it. |
996 | * This goes through the data cache. | |
997 | */ | |
998 | int | |
999 | bug_fetch_word (addr) | |
1000 | CORE_ADDR addr; | |
1001 | { | |
1002 | return dcache_fetch (addr); | |
1003 | } | |
1004 | ||
1005 | /* Write a word WORD into remote address ADDR. | |
1006 | This goes through the data cache. */ | |
1007 | ||
1008 | void | |
1009 | bug_store_word (addr, word) | |
1010 | CORE_ADDR addr; | |
1011 | int word; | |
1012 | { | |
1013 | dcache_poke (addr, word); | |
1014 | } | |
1015 | ||
1016 | int | |
1017 | bug_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
1018 | CORE_ADDR memaddr; | |
1019 | char *myaddr; | |
1020 | int len; | |
1021 | int write; | |
1022 | struct target_ops *target; /* ignored */ | |
1023 | { | |
1024 | register int i; | |
1025 | ||
1026 | /* Round starting address down to longword boundary. */ | |
1027 | register CORE_ADDR addr; | |
1028 | ||
1029 | /* Round ending address up; get number of longwords that makes. */ | |
1030 | register int count; | |
1031 | ||
1032 | /* Allocate buffer of that many longwords. */ | |
1033 | register int *buffer; | |
1034 | ||
1035 | addr = memaddr & -sizeof (int); | |
1036 | count = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
1037 | ||
1038 | buffer = (int *) alloca (count * sizeof (int)); | |
1039 | ||
1040 | if (write) | |
1041 | { | |
1042 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
1043 | ||
1044 | if (addr != memaddr || len < (int) sizeof (int)) | |
1045 | { | |
1046 | /* Need part of initial word -- fetch it. */ | |
1047 | buffer[0] = bug_fetch_word (addr); | |
1048 | } | |
1049 | ||
1050 | if (count > 1) /* FIXME, avoid if even boundary */ | |
1051 | { | |
1052 | buffer[count - 1] | |
1053 | = bug_fetch_word (addr + (count - 1) * sizeof (int)); | |
1054 | } | |
1055 | ||
1056 | /* Copy data to be written over corresponding part of buffer */ | |
1057 | ||
1058 | bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
1059 | ||
1060 | /* Write the entire buffer. */ | |
1061 | ||
1062 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
1063 | { | |
1064 | errno = 0; | |
1065 | bug_store_word (addr, buffer[i]); | |
1066 | if (errno) | |
1067 | { | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | } | |
1073 | } | |
1074 | else | |
1075 | { | |
1076 | /* Read all the longwords */ | |
1077 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
1078 | { | |
1079 | errno = 0; | |
1080 | buffer[i] = bug_fetch_word (addr); | |
1081 | if (errno) | |
1082 | { | |
1083 | return 0; | |
1084 | } | |
1085 | QUIT; | |
1086 | } | |
1087 | ||
1088 | /* Copy appropriate bytes out of the buffer. */ | |
1089 | bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); | |
1090 | } | |
1091 | ||
1092 | return len; | |
1093 | } | |
1094 | ||
be58e87e RP |
1095 | static void |
1096 | start_load() | |
1097 | { | |
1098 | char *command; | |
1099 | ||
1100 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
1101 | ||
1102 | bug_write_cr (command); | |
1103 | expect (command); | |
1104 | expect ("\r\n"); | |
1105 | bug_srec_write_cr ("S0030000FC"); | |
1106 | return; | |
1107 | } | |
1108 | ||
1109 | /* This is an extremely vulnerable and fragile function. I've made | |
1110 | considerable attempts to make this deterministic, but I've | |
1111 | certainly forgotten something. The trouble is that S-records are | |
1112 | only a partial file format, not a protocol. Worse, apparently the | |
1113 | m88k bug monitor does not run in real time while receiving | |
1114 | S-records. Hence, we must pay excruciating attention to when and | |
1115 | where error messages are returned, and what has actually been sent. | |
5905161c | 1116 | |
be58e87e RP |
1117 | Each call represents a chunk of memory to be sent to the target. |
1118 | We break that chunk into an S0 header record, some number of S3 | |
1119 | data records each containing srec_bytes, and an S7 termination | |
1120 | record. */ | |
1121 | ||
1122 | static int | |
5905161c RP |
1123 | bug_write_inferior_memory (memaddr, myaddr, len) |
1124 | CORE_ADDR memaddr; | |
1125 | unsigned char *myaddr; | |
1126 | int len; | |
1127 | { | |
1128 | int done; | |
5905161c | 1129 | int checksum; |
be58e87e RP |
1130 | int x; |
1131 | int retries; | |
1132 | char buffer[(srec_bytes + 8) << 1]; | |
5905161c | 1133 | |
be58e87e | 1134 | retries = 0; |
5905161c | 1135 | |
be58e87e | 1136 | do |
5905161c | 1137 | { |
be58e87e RP |
1138 | done = 0; |
1139 | ||
1140 | if (retries > srec_max_retries) | |
1141 | return(-1); | |
1142 | ||
1143 | if (retries > 0) | |
5905161c | 1144 | { |
be58e87e RP |
1145 | if (!quiet) |
1146 | printf("\n<retrying...>\n"); | |
1147 | ||
1148 | /* This expect_prompt call is extremely important. Without | |
1149 | it, we will tend to resend our packet so fast that it | |
1150 | will arrive before the bug monitor is ready to receive | |
1151 | it. This would lead to a very ugly resend loop. */ | |
1152 | ||
1153 | expect_prompt(); | |
5905161c | 1154 | } |
5905161c | 1155 | |
be58e87e RP |
1156 | start_load(); |
1157 | ||
1158 | while (done < len) | |
1159 | { | |
1160 | int thisgo; | |
1161 | int idx; | |
1162 | char *buf = buffer; | |
1163 | CORE_ADDR address; | |
1164 | ||
1165 | checksum = 0; | |
1166 | thisgo = len - done; | |
1167 | if (thisgo > srec_bytes) | |
1168 | thisgo = srec_bytes; | |
1169 | ||
1170 | address = memaddr + done; | |
1171 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
1172 | buf += 12; | |
1173 | ||
1174 | checksum += (thisgo + 4 + 1 | |
1175 | + (address & 0xff) | |
1176 | + ((address >> 8) & 0xff) | |
1177 | + ((address >> 16) & 0xff) | |
1178 | + ((address >> 24) & 0xff)); | |
1179 | ||
1180 | for (idx = 0; idx < thisgo; idx++) | |
1181 | { | |
1182 | sprintf (buf, "%02X", myaddr[idx + done]); | |
1183 | checksum += myaddr[idx + done]; | |
1184 | buf += 2; | |
1185 | } | |
1186 | ||
1187 | if (srec_noise > 0) | |
1188 | { | |
1189 | /* FIXME-NOW: insert a deliberate error every now and then. | |
1190 | This is intended for testing/debugging the error handling | |
1191 | stuff. */ | |
1192 | static int counter = 0; | |
1193 | if (++counter > srec_noise) | |
1194 | { | |
1195 | counter = 0; | |
1196 | ++checksum; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | sprintf(buf, "%02X", ~checksum & 0xff); | |
1201 | bug_srec_write_cr (buffer); | |
1202 | ||
1203 | if (srec_sleep != 0) | |
1204 | sleep(srec_sleep); | |
1205 | ||
1206 | /* This pollchar is probably redundant to the double_scan | |
1207 | below. Trouble is, we can't be sure when or where an | |
1208 | error message will appear. Apparently, when running at | |
1209 | full speed from a typical sun4, error messages tend to | |
1210 | appear to arrive only *after* the s7 record. */ | |
1211 | ||
1212 | if ((x = pollchar()) != 0) | |
1213 | { | |
1214 | if (!quiet) | |
1215 | printf("\n<retrying...>\n"); | |
1216 | ||
1217 | ++retries; | |
1218 | ||
1219 | /* flush any remaining input and verify that we are back | |
1220 | at the prompt level. */ | |
1221 | expect_prompt(); | |
1222 | /* start all over again. */ | |
1223 | start_load(); | |
1224 | done = 0; | |
1225 | continue; | |
1226 | } | |
1227 | ||
1228 | done += thisgo; | |
1229 | } | |
1230 | ||
1231 | bug_srec_write_cr("S7060000000000F9"); | |
1232 | ++retries; | |
1233 | ||
1234 | /* Having finished the load, we need to figure out whether we | |
1235 | had any errors. */ | |
1236 | } while (double_scan("S-RECORD", "8???-Bug>"));; | |
1237 | ||
1238 | return(0); | |
5905161c RP |
1239 | } |
1240 | ||
1241 | void | |
1242 | bug_files_info () | |
1243 | { | |
1244 | char *file = "nothing"; | |
1245 | ||
1246 | if (exec_bfd) | |
1247 | file = bfd_get_filename (exec_bfd); | |
1248 | ||
1249 | if (exec_bfd) | |
1250 | #ifdef __GO32__ | |
1251 | printf_filtered ("\tAttached to DOS asynctsr and running program %s\n", file); | |
1252 | #else | |
1253 | printf_filtered ("\tAttached to %s at %d baud and running program %s\n", dev_name, baudrate, file); | |
1254 | #endif | |
1255 | printf_filtered ("\ton an m88k processor.\n"); | |
1256 | } | |
1257 | ||
1258 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
1259 | to inferior's memory at MEMADDR. Returns errno value. | |
1260 | * sb/sh instructions don't work on unaligned addresses, when TU=1. | |
1261 | */ | |
1262 | ||
1263 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
1264 | at debugger address MYADDR. Returns errno value. */ | |
be58e87e | 1265 | static int |
5905161c RP |
1266 | bug_read_inferior_memory (memaddr, myaddr, len) |
1267 | CORE_ADDR memaddr; | |
1268 | char *myaddr; | |
1269 | int len; | |
1270 | { | |
1271 | char request[100]; | |
1272 | char *buffer; | |
1273 | char *p; | |
1274 | char type; | |
1275 | char size; | |
1276 | unsigned char c; | |
1277 | unsigned int inaddr; | |
1278 | unsigned int checksum; | |
1279 | ||
1280 | sprintf(request, "du 0 %x:&%d", memaddr, len); | |
1281 | bug_write_cr(request); | |
1282 | ||
1283 | p = buffer = alloca(len); | |
1284 | ||
1285 | /* scan up through the header */ | |
1286 | expect("S0030000FC"); | |
1287 | ||
1288 | while (p < buffer + len) | |
1289 | { | |
1290 | /* scan off any white space. */ | |
1291 | while (readchar() != 'S') ;; | |
1292 | ||
1293 | /* what kind of s-rec? */ | |
1294 | type = readchar(); | |
1295 | ||
1296 | /* scan record size */ | |
1297 | get_hex_byte(&size); | |
1298 | checksum = size; | |
1299 | --size; | |
1300 | inaddr = 0; | |
1301 | ||
1302 | switch (type) | |
1303 | { | |
1304 | case '7': | |
1305 | case '8': | |
1306 | case '9': | |
1307 | goto done; | |
1308 | ||
1309 | case '3': | |
1310 | get_hex_byte(&c); | |
1311 | inaddr = (inaddr << 8) + c; | |
1312 | checksum += c; | |
1313 | --size; | |
1314 | /* intentional fall through */ | |
1315 | case '2': | |
1316 | get_hex_byte(&c); | |
1317 | inaddr = (inaddr << 8) + c; | |
1318 | checksum += c; | |
1319 | --size; | |
1320 | /* intentional fall through */ | |
1321 | case '1': | |
1322 | get_hex_byte(&c); | |
1323 | inaddr = (inaddr << 8) + c; | |
1324 | checksum += c; | |
1325 | --size; | |
1326 | get_hex_byte(&c); | |
1327 | inaddr = (inaddr << 8) + c; | |
1328 | checksum += c; | |
1329 | --size; | |
1330 | break; | |
1331 | ||
1332 | default: | |
1333 | /* bonk */ | |
1334 | error("reading s-records."); | |
1335 | } | |
1336 | ||
1337 | if (inaddr < memaddr | |
1338 | || (memaddr + len) < (inaddr + size)) | |
1339 | error("srec out of memory range."); | |
1340 | ||
1341 | if (p != buffer + inaddr - memaddr) | |
1342 | error("srec out of sequence."); | |
1343 | ||
1344 | for (; size; --size, ++p) | |
1345 | { | |
1346 | get_hex_byte(p); | |
1347 | checksum += *p; | |
1348 | } | |
1349 | ||
1350 | get_hex_byte(&c); | |
1351 | if (c != (~checksum & 0xff)) | |
1352 | error("bad s-rec checksum"); | |
1353 | } | |
1354 | ||
1355 | done: | |
1356 | expect_prompt(); | |
1357 | if (p != buffer + len) | |
1358 | return(1); | |
1359 | ||
1360 | memcpy(myaddr, buffer, len); | |
1361 | return(0); | |
1362 | } | |
1363 | ||
5905161c RP |
1364 | #define MAX_BREAKS 16 |
1365 | static int num_brkpts = 0; | |
1366 | static int | |
1367 | bug_insert_breakpoint (addr, save) | |
1368 | CORE_ADDR addr; | |
1369 | char *save; /* Throw away, let bug save instructions */ | |
1370 | { | |
1371 | check_open (); | |
1372 | ||
1373 | if (num_brkpts < MAX_BREAKS) | |
1374 | { | |
1375 | char buffer[100]; | |
1376 | ||
1377 | num_brkpts++; | |
1378 | sprintf (buffer, "br %x", addr); | |
1379 | bug_write_cr (buffer); | |
1380 | expect_prompt (); | |
1381 | return(0); | |
1382 | } | |
1383 | else | |
1384 | { | |
1385 | fprintf_filtered (stderr, | |
1386 | "Too many break points, break point not installed\n"); | |
1387 | return(1); | |
1388 | } | |
1389 | ||
1390 | } | |
1391 | static int | |
1392 | bug_remove_breakpoint (addr, save) | |
1393 | CORE_ADDR addr; | |
1394 | char *save; /* Throw away, let bug save instructions */ | |
1395 | { | |
1396 | if (num_brkpts > 0) | |
1397 | { | |
1398 | char buffer[100]; | |
1399 | ||
1400 | num_brkpts--; | |
1401 | sprintf (buffer, "nobr %x", addr); | |
1402 | bug_write_cr (buffer); | |
1403 | expect_prompt (); | |
1404 | ||
1405 | } | |
1406 | return (0); | |
1407 | } | |
1408 | ||
1409 | /* Clear the bugs notion of what the break points are */ | |
1410 | static int | |
1411 | bug_clear_breakpoints () | |
1412 | { | |
1413 | ||
1414 | if (is_open) | |
1415 | { | |
1416 | bug_write_cr ("nobr"); | |
be58e87e | 1417 | expect("nobr"); |
5905161c RP |
1418 | expect_prompt (); |
1419 | } | |
1420 | num_brkpts = 0; | |
be58e87e | 1421 | return(0); |
5905161c | 1422 | } |
be58e87e | 1423 | |
5905161c RP |
1424 | static void |
1425 | bug_mourn () | |
1426 | { | |
1427 | bug_clear_breakpoints (); | |
1428 | generic_mourn_inferior (); | |
1429 | } | |
1430 | ||
1431 | /* Put a command string, in args, out to the bug. The bug is assumed to | |
1432 | be in raw mode, all writing/reading done through desc. | |
1433 | Ouput from the bug is placed on the users terminal until the | |
1434 | prompt from the bug is seen. | |
1435 | FIXME: Can't handle commands that take input. */ | |
1436 | ||
1437 | void | |
1438 | bug_com (args, fromtty) | |
1439 | char *args; | |
1440 | int fromtty; | |
1441 | { | |
1442 | check_open (); | |
1443 | ||
1444 | if (!args) | |
1445 | return; | |
1446 | ||
1447 | /* Clear all input so only command relative output is displayed */ | |
1448 | ||
1449 | bug_write_cr (args); | |
1450 | bug_write ("\030", 1); | |
1451 | expect_prompt (); | |
1452 | } | |
1453 | ||
be58e87e RP |
1454 | static void |
1455 | bug_quiet (args, fromtty) | |
1456 | char *args; | |
1457 | int fromtty; | |
5905161c RP |
1458 | { |
1459 | quiet = !quiet; | |
1460 | if (quiet) | |
1461 | printf_filtered ("Snoop disabled\n"); | |
1462 | else | |
1463 | printf_filtered ("Snoop enabled\n"); | |
1464 | ||
be58e87e | 1465 | return; |
5905161c RP |
1466 | } |
1467 | ||
be58e87e RP |
1468 | static void |
1469 | bug_device (args, fromtty) | |
1470 | char *args; | |
1471 | int fromtty; | |
5905161c | 1472 | { |
be58e87e RP |
1473 | if (args) |
1474 | dev_name = get_word (&args); | |
1475 | ||
1476 | return; | |
5905161c RP |
1477 | } |
1478 | ||
1479 | #if 0 | |
1480 | static | |
1481 | bug_speed (s) | |
1482 | char *s; | |
1483 | { | |
1484 | check_open (); | |
1485 | ||
1486 | if (s) | |
1487 | { | |
1488 | char buffer[100]; | |
1489 | int newrate = atoi (s); | |
1490 | int which = 0; | |
1491 | ||
1492 | if (SERIAL_SETBAUDRATE (desc, newrate)) | |
1493 | error ("Can't use %d baud\n", newrate); | |
1494 | ||
1495 | printf_filtered ("Checking target is in sync\n"); | |
1496 | ||
1497 | printf_filtered ("Sending commands to set target to %d\n", | |
1498 | baudrate); | |
1499 | ||
1500 | sprintf (buffer, "tm %d. N 8 1", baudrate); | |
1501 | bug_write_cr (buffer); | |
1502 | } | |
1503 | } | |
1504 | #endif /* 0 */ | |
1505 | ||
ae87844d | 1506 | struct target_ops bug_ops = |
5905161c RP |
1507 | { |
1508 | "bug", "Remote BUG monitor", | |
1509 | "Use the mvme187 board running the BUG monitor connected\n\ | |
1510 | by a serial line.", | |
1511 | ||
1512 | bug_open, bug_close, | |
1513 | 0, bug_detach, bug_resume, bug_wait, /* attach */ | |
1514 | bug_fetch_register, bug_store_register, | |
1515 | bug_prepare_to_store, | |
1516 | bug_xfer_inferior_memory, | |
1517 | bug_files_info, | |
1518 | bug_insert_breakpoint, bug_remove_breakpoint, /* Breakpoints */ | |
1519 | 0, 0, 0, 0, 0, /* Terminal handling */ | |
1520 | bug_kill, /* FIXME, kill */ | |
1521 | bug_load, | |
1522 | 0, /* lookup_symbol */ | |
1523 | bug_create_inferior, /* create_inferior */ | |
1524 | bug_mourn, /* mourn_inferior FIXME */ | |
1525 | 0, /* can_run */ | |
1526 | 0, /* notice_signals */ | |
1527 | process_stratum, 0, /* next */ | |
1528 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ | |
1529 | 0, 0, /* Section pointers */ | |
1530 | OPS_MAGIC, /* Always the last thing */ | |
1531 | }; | |
1532 | ||
1533 | void | |
1534 | _initialize_remote_bug () | |
1535 | { | |
1536 | add_target (&bug_ops); | |
1537 | ||
1538 | add_com ("bug <command>", class_obscure, bug_com, | |
1539 | "Send a command to the BUG monitor."); | |
1540 | add_com ("snoop", class_obscure, bug_quiet, | |
1541 | "Show what commands are going to the monitor"); | |
1542 | ||
1543 | add_com ("device", class_obscure, bug_device, | |
1544 | "Set the terminal line for BUG communications"); | |
1545 | ||
1546 | #if 0 | |
1547 | add_com ("speed", class_obscure, bug_speed, | |
1548 | "Set the terminal line speed for BUG communications"); | |
1549 | #endif /* 0 */ | |
1550 | ||
be58e87e RP |
1551 | add_show_from_set |
1552 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
1553 | (char *) &srec_bytes, | |
1554 | "\ | |
1555 | Set the number of bytes represented in each S-record.\n\ | |
1556 | This affects the communication protocol with the remote target.", | |
1557 | &setlist), | |
1558 | &showlist); | |
1559 | ||
1560 | add_show_from_set | |
1561 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
1562 | (char *) &srec_max_retries, | |
1563 | "\ | |
1564 | Set the number of retries for shipping S-records.\n\ | |
1565 | This affects the communication protocol with the remote target.", | |
1566 | &setlist), | |
1567 | &showlist); | |
1568 | ||
1569 | add_show_from_set | |
1570 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
1571 | (char *) &srec_frame, | |
1572 | "\ | |
1573 | Set the number of bytes in an S-record frame.\n\ | |
1574 | This affects the communication protocol with the remote target.", | |
1575 | &setlist), | |
1576 | &showlist); | |
1577 | ||
1578 | add_show_from_set | |
1579 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1580 | (char *) &srec_noise, | |
1581 | "\ | |
1582 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1583 | Zero means flub none at all. This affects the communication protocol\n\ | |
1584 | with the remote target.", | |
1585 | &setlist), | |
1586 | &showlist); | |
1587 | ||
1588 | add_show_from_set | |
1589 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1590 | (char *) &srec_sleep, | |
1591 | "\ | |
1592 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1593 | This affects the communication protocol with the remote target.", | |
1594 | &setlist), | |
1595 | &showlist); | |
1596 | ||
1597 | add_show_from_set | |
1598 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1599 | (char *) &srec_echo_pace, | |
1600 | "\ | |
1601 | Set echo-verification.\n\ | |
1602 | When on, use verification by echo when downloading S-records. This is\n\ | |
1603 | much slower, but generally more reliable.", | |
1604 | &setlist), | |
1605 | &showlist); | |
1606 | ||
5905161c RP |
1607 | dev_name = NULL; |
1608 | } |