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 | ||
be58e87e RP |
68 | /* This is the serial descriptor to our target. */ |
69 | ||
70 | static serial_t desc = NULL; | |
71 | ||
72 | /* This variable is somewhat arbitrary. It's here so that it can be | |
73 | set from within a running gdb. */ | |
74 | ||
75 | static int srec_max_retries = 3; | |
76 | ||
77 | /* Each S-record download to the target consists of an S0 header | |
78 | record, some number of S3 data records, and one S7 termination | |
79 | record. I call this download a "frame". Srec_frame says how many | |
80 | bytes will be represented in each frame. */ | |
81 | ||
82 | static int srec_frame = 160; | |
83 | ||
84 | /* This variable determines how many bytes will be represented in each | |
85 | S3 s-record. */ | |
86 | ||
87 | static int srec_bytes = 40; | |
88 | ||
89 | /* At one point it appeared to me as though the bug monitor could not | |
90 | really be expected to receive two sequential characters at 9600 | |
91 | baud reliably. Echo-pacing is an attempt to force data across the | |
92 | line even in this condition. Specifically, in echo-pace mode, each | |
93 | character is sent one at a time and we look for the echo before | |
94 | sending the next. This is excruciatingly slow. */ | |
5905161c | 95 | |
be58e87e RP |
96 | static int srec_echo_pace = 0; |
97 | ||
98 | /* How long to wait after an srec for a possible error message. | |
99 | Similar to the above, I tried sleeping after sending each S3 record | |
100 | in hopes that I might actually see error messages from the bug | |
101 | monitor. This might actually work if we were to use sleep | |
102 | intervals smaller than 1 second. */ | |
103 | ||
104 | static int srec_sleep = 0; | |
105 | ||
106 | /* Every srec_noise records, flub the checksum. This is a debugging | |
107 | feature. Set the variable to something other than 1 in order to | |
108 | inject *deliberate* checksum errors. One might do this if one | |
109 | wanted to test error handling and recovery. */ | |
110 | ||
111 | static int srec_noise = 0; | |
5905161c RP |
112 | |
113 | /***********************************************************************/ | |
114 | /* Caching stuff stolen from remote-nindy.c */ | |
115 | ||
116 | /* The data cache records all the data read from the remote machine | |
117 | since the last time it stopped. | |
118 | ||
119 | Each cache block holds LINE_SIZE bytes of data | |
120 | starting at a multiple-of-LINE_SIZE address. */ | |
121 | ||
122 | #define LINE_SIZE_POWER 4 | |
123 | #define LINE_SIZE (1<<LINE_SIZE_POWER) /* eg 1<<3 == 8 */ | |
124 | #define LINE_SIZE_MASK ((LINE_SIZE-1)) /* eg 7*2+1= 111*/ | |
125 | #define DCACHE_SIZE 64 /* Number of cache blocks */ | |
126 | #define XFORM(x) ((x&LINE_SIZE_MASK)>>2) | |
127 | struct dcache_block | |
128 | { | |
129 | struct dcache_block *next, *last; | |
130 | unsigned int addr; /* Address for which data is recorded. */ | |
131 | int data[LINE_SIZE / sizeof (int)]; | |
132 | }; | |
133 | ||
134 | struct dcache_block dcache_free, dcache_valid; | |
135 | ||
136 | /* Free all the data cache blocks, thus discarding all cached data. */ | |
137 | static | |
138 | void | |
139 | dcache_flush () | |
140 | { | |
141 | register struct dcache_block *db; | |
142 | ||
143 | while ((db = dcache_valid.next) != &dcache_valid) | |
144 | { | |
145 | remque (db); | |
146 | insque (db, &dcache_free); | |
147 | } | |
148 | } | |
149 | ||
150 | /* | |
151 | * If addr is present in the dcache, return the address of the block | |
152 | * containing it. | |
153 | */ | |
154 | static | |
155 | struct dcache_block * | |
156 | dcache_hit (addr) | |
157 | unsigned int addr; | |
158 | { | |
159 | register struct dcache_block *db; | |
160 | ||
161 | if (addr & 3) | |
162 | abort (); | |
163 | ||
164 | /* Search all cache blocks for one that is at this address. */ | |
165 | db = dcache_valid.next; | |
166 | while (db != &dcache_valid) | |
167 | { | |
168 | if ((addr & ~LINE_SIZE_MASK) == db->addr) | |
169 | return db; | |
170 | db = db->next; | |
171 | } | |
172 | return NULL; | |
173 | } | |
174 | ||
175 | /* Return the int data at address ADDR in dcache block DC. */ | |
176 | static | |
177 | int | |
178 | dcache_value (db, addr) | |
179 | struct dcache_block *db; | |
180 | unsigned int addr; | |
181 | { | |
182 | if (addr & 3) | |
183 | abort (); | |
184 | return (db->data[XFORM (addr)]); | |
185 | } | |
186 | ||
187 | /* Get a free cache block, put or keep it on the valid list, | |
188 | and return its address. The caller should store into the block | |
189 | the address and data that it describes, then remque it from the | |
190 | free list and insert it into the valid list. This procedure | |
191 | prevents errors from creeping in if a ninMemGet is interrupted | |
192 | (which used to put garbage blocks in the valid list...). */ | |
193 | static | |
194 | struct dcache_block * | |
195 | dcache_alloc () | |
196 | { | |
197 | register struct dcache_block *db; | |
198 | ||
199 | if ((db = dcache_free.next) == &dcache_free) | |
200 | { | |
201 | /* If we can't get one from the free list, take last valid and put | |
202 | it on the free list. */ | |
203 | db = dcache_valid.last; | |
204 | remque (db); | |
205 | insque (db, &dcache_free); | |
206 | } | |
207 | ||
208 | remque (db); | |
209 | insque (db, &dcache_valid); | |
210 | return (db); | |
211 | } | |
212 | ||
213 | /* Return the contents of the word at address ADDR in the remote machine, | |
214 | using the data cache. */ | |
215 | static | |
216 | int | |
217 | dcache_fetch (addr) | |
218 | CORE_ADDR addr; | |
219 | { | |
220 | register struct dcache_block *db; | |
221 | ||
222 | db = dcache_hit (addr); | |
223 | if (db == 0) | |
224 | { | |
225 | db = dcache_alloc (); | |
226 | immediate_quit++; | |
227 | bug_read_inferior_memory (addr & ~LINE_SIZE_MASK, (unsigned char *) db->data, LINE_SIZE); | |
228 | immediate_quit--; | |
229 | db->addr = addr & ~LINE_SIZE_MASK; | |
230 | remque (db); /* Off the free list */ | |
231 | insque (db, &dcache_valid); /* On the valid list */ | |
232 | } | |
233 | return (dcache_value (db, addr)); | |
234 | } | |
235 | ||
236 | /* Write the word at ADDR both in the data cache and in the remote machine. */ | |
237 | static void | |
238 | dcache_poke (addr, data) | |
239 | CORE_ADDR addr; | |
240 | int data; | |
241 | { | |
242 | register struct dcache_block *db; | |
243 | ||
244 | /* First make sure the word is IN the cache. DB is its cache block. */ | |
245 | db = dcache_hit (addr); | |
246 | if (db == 0) | |
247 | { | |
248 | db = dcache_alloc (); | |
249 | immediate_quit++; | |
250 | bug_write_inferior_memory (addr & ~LINE_SIZE_MASK, (unsigned char *) db->data, LINE_SIZE); | |
251 | immediate_quit--; | |
252 | db->addr = addr & ~LINE_SIZE_MASK; | |
253 | remque (db); /* Off the free list */ | |
254 | insque (db, &dcache_valid); /* On the valid list */ | |
255 | } | |
256 | ||
257 | /* Modify the word in the cache. */ | |
258 | db->data[XFORM (addr)] = data; | |
259 | ||
260 | /* Send the changed word. */ | |
261 | immediate_quit++; | |
262 | bug_write_inferior_memory (addr, (unsigned char *) &data, 4); | |
263 | immediate_quit--; | |
264 | } | |
265 | ||
266 | /* The cache itself. */ | |
267 | struct dcache_block the_cache[DCACHE_SIZE]; | |
268 | ||
269 | /* Initialize the data cache. */ | |
270 | static void | |
271 | dcache_init () | |
272 | { | |
273 | register i; | |
274 | register struct dcache_block *db; | |
275 | ||
276 | db = the_cache; | |
277 | dcache_free.next = dcache_free.last = &dcache_free; | |
278 | dcache_valid.next = dcache_valid.last = &dcache_valid; | |
279 | for (i = 0; i < DCACHE_SIZE; i++, db++) | |
280 | insque (db, &dcache_free); | |
281 | } | |
282 | ||
283 | /*********************************************************************** | |
284 | * I/O stuff stolen from remote-eb.c | |
285 | ***********************************************************************/ | |
286 | ||
be58e87e RP |
287 | /* with a timeout of 2, we time out waiting for the prompt after an |
288 | s-record dump. */ | |
289 | static int timeout = 4; | |
5905161c RP |
290 | |
291 | static const char *dev_name; | |
292 | ||
293 | /* Descriptor for I/O to remote machine. Initialize it to -1 so that | |
294 | bug_open knows that we don't have a file open when the program | |
295 | starts. */ | |
296 | ||
be58e87e RP |
297 | static int is_open = 0; |
298 | static int | |
5905161c RP |
299 | check_open () |
300 | { | |
301 | if (!is_open) | |
302 | { | |
303 | error ("remote device not open"); | |
304 | } | |
be58e87e RP |
305 | |
306 | return(1); | |
5905161c RP |
307 | } |
308 | ||
309 | #define ON 1 | |
310 | #define OFF 0 | |
311 | ||
312 | /* Read a character from the remote system, doing all the fancy | |
313 | timeout stuff. */ | |
314 | static int | |
315 | readchar () | |
316 | { | |
317 | int buf; | |
318 | ||
319 | buf = SERIAL_READCHAR (desc, timeout); | |
320 | ||
321 | if (buf == SERIAL_TIMEOUT) | |
322 | error ("Timeout reading from remote system."); | |
323 | ||
b11d53ba | 324 | if (remote_debug) |
5905161c RP |
325 | printf ("%c", buf); |
326 | ||
327 | return buf & 0x7f; | |
328 | } | |
329 | ||
330 | static int | |
331 | readchar_nofail () | |
332 | { | |
333 | int buf; | |
334 | ||
335 | buf = SERIAL_READCHAR (desc, timeout); | |
336 | if (buf == SERIAL_TIMEOUT) | |
337 | buf = 0; | |
b11d53ba | 338 | if (remote_debug) |
be58e87e RP |
339 | if (buf) |
340 | printf ("%c", buf); | |
341 | else | |
342 | printf ("<timeout>"); | |
5905161c RP |
343 | |
344 | return buf & 0x7f; | |
345 | ||
346 | } | |
347 | ||
be58e87e RP |
348 | static int |
349 | pollchar() | |
350 | { | |
351 | int buf; | |
352 | ||
353 | buf = SERIAL_READCHAR (desc, 0); | |
354 | if (buf == SERIAL_TIMEOUT) | |
355 | buf = 0; | |
b11d53ba | 356 | if (remote_debug) |
be58e87e RP |
357 | if (buf) |
358 | printf ("%c", buf); | |
359 | else | |
360 | printf ("<empty poll>"); | |
361 | ||
362 | return buf & 0x7f; | |
363 | } | |
364 | ||
5905161c RP |
365 | /* Keep discarding input from the remote system, until STRING is found. |
366 | Let the user break out immediately. */ | |
367 | static void | |
368 | expect (string) | |
369 | char *string; | |
370 | { | |
371 | char *p = string; | |
372 | ||
373 | immediate_quit = 1; | |
be58e87e | 374 | for (;;) |
5905161c RP |
375 | { |
376 | if (readchar () == *p) | |
377 | { | |
378 | p++; | |
379 | if (*p == '\0') | |
380 | { | |
381 | immediate_quit = 0; | |
382 | return; | |
383 | } | |
384 | } | |
385 | else | |
386 | p = string; | |
387 | } | |
388 | } | |
389 | ||
390 | /* Keep discarding input until we see the bug prompt. | |
391 | ||
392 | The convention for dealing with the prompt is that you | |
393 | o give your command | |
394 | o *then* wait for the prompt. | |
395 | ||
396 | Thus the last thing that a procedure does with the serial line | |
397 | will be an expect_prompt(). Exception: bug_resume does not | |
398 | wait for the prompt, because the terminal is being handed over | |
399 | to the inferior. However, the next thing which happens after that | |
400 | is a bug_wait which does wait for the prompt. | |
401 | Note that this includes abnormal exit, e.g. error(). This is | |
402 | necessary to prevent getting into states from which we can't | |
403 | recover. */ | |
404 | static void | |
405 | expect_prompt () | |
406 | { | |
407 | expect ("Bug>"); | |
408 | } | |
409 | ||
410 | /* Get a hex digit from the remote system & return its value. | |
411 | If ignore_space is nonzero, ignore spaces (not newline, tab, etc). */ | |
412 | static int | |
413 | get_hex_digit (ignore_space) | |
414 | int ignore_space; | |
415 | { | |
416 | int ch; | |
417 | ||
be58e87e | 418 | for (;;) |
5905161c RP |
419 | { |
420 | ch = readchar (); | |
421 | if (ch >= '0' && ch <= '9') | |
422 | return ch - '0'; | |
423 | else if (ch >= 'A' && ch <= 'F') | |
424 | return ch - 'A' + 10; | |
425 | else if (ch >= 'a' && ch <= 'f') | |
426 | return ch - 'a' + 10; | |
be58e87e | 427 | else if (ch != ' ' || !ignore_space) |
5905161c RP |
428 | { |
429 | expect_prompt (); | |
430 | error ("Invalid hex digit from remote system."); | |
431 | } | |
432 | } | |
433 | } | |
434 | ||
435 | /* Get a byte from bug_desc and put it in *BYT. Accept any number | |
436 | leading spaces. */ | |
437 | static void | |
438 | get_hex_byte (byt) | |
439 | char *byt; | |
440 | { | |
441 | int val; | |
442 | ||
443 | val = get_hex_digit (1) << 4; | |
444 | val |= get_hex_digit (0); | |
445 | *byt = val; | |
446 | } | |
447 | ||
448 | /* Read a 32-bit hex word from the bug, preceded by a space */ | |
449 | static long | |
450 | get_hex_word () | |
451 | { | |
452 | long val; | |
453 | int j; | |
454 | ||
455 | val = 0; | |
456 | for (j = 0; j < 8; j++) | |
457 | val = (val << 4) + get_hex_digit (j == 0); | |
458 | return val; | |
459 | } | |
460 | ||
461 | /* Called when SIGALRM signal sent due to alarm() timeout. */ | |
462 | ||
463 | /* Number of SIGTRAPs we need to simulate. That is, the next | |
464 | NEED_ARTIFICIAL_TRAP calls to bug_wait should just return | |
465 | SIGTRAP without actually waiting for anything. */ | |
466 | ||
467 | static int need_artificial_trap = 0; | |
468 | ||
469 | void | |
470 | bug_kill (arg, from_tty) | |
471 | char *arg; | |
472 | int from_tty; | |
473 | { | |
474 | ||
475 | } | |
476 | ||
477 | /* | |
478 | * Download a file specified in 'args', to the bug. | |
479 | */ | |
be58e87e | 480 | |
5905161c RP |
481 | static void |
482 | bug_load (args, fromtty) | |
483 | char *args; | |
484 | int fromtty; | |
485 | { | |
486 | bfd *abfd; | |
487 | asection *s; | |
5905161c RP |
488 | char buffer[1024]; |
489 | ||
490 | check_open (); | |
491 | ||
492 | dcache_flush (); | |
493 | inferior_pid = 0; | |
494 | abfd = bfd_openr (args, 0); | |
495 | if (!abfd) | |
496 | { | |
497 | printf_filtered ("Unable to open file %s\n", args); | |
498 | return; | |
499 | } | |
500 | ||
501 | if (bfd_check_format (abfd, bfd_object) == 0) | |
502 | { | |
503 | printf_filtered ("File is not an object file\n"); | |
504 | return; | |
505 | } | |
506 | ||
507 | s = abfd->sections; | |
508 | while (s != (asection *) NULL) | |
509 | { | |
510 | if (s->flags & SEC_LOAD) | |
511 | { | |
512 | int i; | |
513 | ||
be58e87e | 514 | char *buffer = xmalloc (srec_frame); |
5905161c RP |
515 | |
516 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size); | |
be58e87e RP |
517 | fflush (stdout); |
518 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
5905161c | 519 | { |
be58e87e RP |
520 | if (srec_frame > s->_raw_size - i) |
521 | srec_frame = s->_raw_size - i; | |
5905161c | 522 | |
be58e87e RP |
523 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); |
524 | bug_write_inferior_memory (s->vma + i, buffer, srec_frame); | |
5905161c RP |
525 | printf_filtered ("*"); |
526 | fflush (stdout); | |
527 | } | |
528 | printf_filtered ("\n"); | |
529 | free (buffer); | |
530 | } | |
531 | s = s->next; | |
532 | } | |
be58e87e | 533 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); |
5905161c RP |
534 | bug_write_cr (buffer); |
535 | expect_prompt (); | |
536 | } | |
537 | ||
538 | /* This is called not only when we first attach, but also when the | |
539 | user types "run" after having attached. */ | |
540 | void | |
541 | bug_create_inferior (execfile, args, env) | |
542 | char *execfile; | |
543 | char *args; | |
544 | char **env; | |
545 | { | |
546 | int entry_pt; | |
5905161c RP |
547 | |
548 | if (args && *args) | |
549 | error ("Can't pass arguments to remote bug process."); | |
550 | ||
551 | if (execfile == 0 || exec_bfd == 0) | |
552 | error ("No exec file specified"); | |
553 | ||
554 | entry_pt = (int) bfd_get_start_address (exec_bfd); | |
555 | check_open (); | |
556 | ||
557 | bug_kill (NULL, NULL); | |
558 | bug_clear_breakpoints (); | |
559 | init_wait_for_inferior (); | |
560 | bug_write_cr (""); | |
561 | expect_prompt (); | |
562 | ||
563 | insert_breakpoints (); /* Needed to get correct instruction in cache */ | |
564 | proceed (entry_pt, -1, 0); | |
565 | } | |
566 | ||
5905161c RP |
567 | static char * |
568 | get_word (p) | |
569 | char **p; | |
570 | { | |
571 | char *s = *p; | |
572 | char *word; | |
573 | char *copy; | |
574 | size_t len; | |
575 | ||
576 | while (isspace (*s)) | |
577 | s++; | |
578 | ||
579 | word = s; | |
580 | ||
581 | len = 0; | |
582 | ||
583 | while (*s && !isspace (*s)) | |
584 | { | |
585 | s++; | |
586 | len++; | |
587 | ||
588 | } | |
589 | copy = xmalloc (len + 1); | |
590 | memcpy (copy, word, len); | |
591 | copy[len] = 0; | |
592 | *p = s; | |
593 | return copy; | |
594 | } | |
595 | ||
596 | static int baudrate = 9600; | |
597 | ||
5905161c RP |
598 | static void |
599 | bug_open (name, from_tty) | |
600 | char *name; | |
601 | int from_tty; | |
602 | { | |
5905161c RP |
603 | push_target (&bug_ops); |
604 | ||
605 | if (name == 0) | |
606 | { | |
607 | name = ""; | |
608 | } | |
609 | if (is_open) | |
610 | bug_close (0); | |
611 | dev_name = strdup (name); | |
612 | ||
613 | if (!(desc = SERIAL_OPEN (dev_name))) | |
614 | perror_with_name ((char *) dev_name); | |
615 | ||
616 | SERIAL_RAW (desc); | |
617 | is_open = 1; | |
618 | ||
619 | dcache_init (); | |
620 | ||
621 | /* Hello? Are you there? */ | |
622 | SERIAL_WRITE (desc, "\r", 1); | |
623 | expect_prompt (); | |
624 | ||
625 | /* Clear any break points */ | |
626 | bug_clear_breakpoints (); | |
627 | ||
628 | printf_filtered ("Connected to remote 187bug system.\n"); | |
629 | } | |
630 | ||
631 | /* Close out all files and local state before this target loses control. */ | |
632 | ||
633 | static void | |
634 | bug_close (quitting) | |
635 | int quitting; | |
636 | { | |
637 | /* Clear any break points */ | |
638 | bug_clear_breakpoints (); | |
639 | ||
640 | if (is_open) | |
641 | SERIAL_CLOSE (desc); | |
642 | ||
643 | is_open = 0; | |
644 | } | |
645 | ||
646 | /* Terminate the open connection to the remote debugger. | |
647 | Use this when you want to detach and do something else | |
648 | with your gdb. */ | |
649 | void | |
650 | bug_detach (args, from_tty) | |
651 | char *args; | |
652 | int from_tty; | |
653 | { | |
654 | if (is_open) | |
655 | bug_clear_breakpoints (); | |
656 | ||
657 | pop_target (); /* calls bug_close to do the real work */ | |
658 | ||
659 | if (from_tty) | |
660 | printf_filtered ("Ending remote %s debugging\n", target_shortname); | |
661 | } | |
662 | ||
663 | /* Tell the remote machine to resume. */ | |
664 | ||
665 | void | |
be58e87e RP |
666 | bug_resume (pid, step, sig) |
667 | int pid, step, sig; | |
5905161c RP |
668 | { |
669 | dcache_flush (); | |
670 | ||
671 | if (step) | |
672 | { | |
673 | bug_write_cr("t"); | |
674 | ||
675 | /* Force the next bug_wait to return a trap. Not doing anything | |
676 | about I/O from the target means that the user has to type | |
677 | "continue" to see any. FIXME, this should be fixed. */ | |
678 | need_artificial_trap = 1; | |
679 | } | |
680 | else | |
681 | bug_write_cr ("g"); | |
682 | ||
683 | return; | |
684 | } | |
685 | ||
16f6ab6b RP |
686 | /* Given a null terminated list of strings LIST, read the input until we find one of |
687 | them. Return the index of the string found or -1 on error. '?' means match | |
688 | any single character. Note that with the algorithm we use, the initial | |
689 | character of the string cannot recur in the string, or we will not find some | |
690 | cases of the string in the input. If PASSTHROUGH is non-zero, then | |
691 | pass non-matching data on. */ | |
692 | ||
be58e87e | 693 | static int |
16f6ab6b RP |
694 | multi_scan (list, passthrough) |
695 | char *list[]; | |
696 | int passthrough; | |
5905161c | 697 | { |
16f6ab6b RP |
698 | char *swallowed = NULL; /* holding area */ |
699 | char *swallowed_p = swallowed; /* Current position in swallowed. */ | |
700 | int ch; | |
701 | int ch_handled; | |
702 | int i; | |
703 | int string_count; | |
704 | int max_length; | |
705 | char **plist; | |
5905161c | 706 | |
16f6ab6b RP |
707 | /* Look through the strings. Count them. Find the largest one so we can |
708 | allocate a holding area. */ | |
5905161c | 709 | |
16f6ab6b RP |
710 | for (max_length = string_count = i = 0; |
711 | list[i] != NULL; | |
712 | ++i, ++string_count) | |
713 | { | |
714 | int length = strlen(list[i]); | |
5905161c | 715 | |
16f6ab6b RP |
716 | if (length > max_length) |
717 | max_length = length; | |
718 | } | |
5905161c | 719 | |
16f6ab6b RP |
720 | /* if we have no strings, then something is wrong. */ |
721 | if (string_count == 0) | |
722 | return(-1); | |
5905161c | 723 | |
16f6ab6b RP |
724 | /* otherwise, we will need a holding area big enough to hold almost two |
725 | copies of our largest string. */ | |
726 | swallowed_p = swallowed = alloca(max_length << 1); | |
727 | ||
728 | /* and a list of pointers to current scan points. */ | |
729 | plist = alloca(string_count * sizeof(*plist)); | |
730 | ||
731 | /* and initialize */ | |
732 | for (i = 0; i < string_count; ++i) | |
733 | plist[i] = list[i]; | |
734 | ||
735 | for (ch = readchar(); /* loop forever */ ; ch = readchar()) | |
5905161c | 736 | { |
be58e87e | 737 | QUIT; /* Let user quit and leave process running */ |
5905161c | 738 | ch_handled = 0; |
be58e87e | 739 | |
16f6ab6b | 740 | for (i = 0; i < string_count; ++i) |
5905161c | 741 | { |
16f6ab6b RP |
742 | if (ch == *plist[i] || *plist[i] == '?') |
743 | { | |
744 | ++plist[i]; | |
745 | if (*plist[i] == '\0') | |
746 | return(i); | |
747 | ||
748 | if (!ch_handled) | |
749 | *swallowed_p++ = ch; | |
5905161c | 750 | |
16f6ab6b RP |
751 | ch_handled = 1; |
752 | } | |
753 | else | |
754 | plist[i] = list[i]; | |
5905161c | 755 | } |
5905161c RP |
756 | |
757 | if (!ch_handled) | |
758 | { | |
759 | char *p; | |
760 | ||
761 | /* Print out any characters which have been swallowed. */ | |
16f6ab6b | 762 | if (passthrough) |
5905161c | 763 | { |
16f6ab6b RP |
764 | for (p = swallowed; p < swallowed_p; ++p) |
765 | putc (*p, stdout); | |
766 | ||
5905161c | 767 | putc (ch, stdout); |
5905161c | 768 | } |
5905161c | 769 | |
16f6ab6b | 770 | swallowed_p = swallowed; |
5905161c | 771 | } |
5905161c | 772 | } |
be58e87e | 773 | |
16f6ab6b | 774 | return(-1); |
be58e87e RP |
775 | } |
776 | ||
777 | /* Wait until the remote machine stops, then return, | |
778 | storing status in STATUS just as `wait' would. */ | |
779 | ||
16f6ab6b RP |
780 | static char *wait_strings[] = { |
781 | "At Breakpoint", | |
782 | "Exception: Data Access Fault (Local Bus Timeout)", | |
783 | "\r8???-Bug>", | |
784 | NULL, | |
785 | }; | |
786 | ||
be58e87e RP |
787 | int |
788 | bug_wait (status) | |
789 | WAITTYPE *status; | |
790 | { | |
791 | int old_timeout = timeout; | |
792 | int old_immediate_quit = immediate_quit; | |
793 | ||
794 | WSETEXIT ((*status), 0); | |
795 | ||
16f6ab6b RP |
796 | /* read off leftovers from resume so that the rest can be passed |
797 | back out as stdout. */ | |
798 | if (need_artificial_trap == 0) | |
5905161c | 799 | { |
16f6ab6b RP |
800 | expect("Effective address: "); |
801 | (void) get_hex_word(); | |
802 | expect ("\r\n"); | |
5905161c | 803 | } |
be58e87e | 804 | |
be58e87e RP |
805 | timeout = -1; /* Don't time out -- user program is running. */ |
806 | immediate_quit = 1; /* Helps ability to QUIT */ | |
807 | ||
16f6ab6b | 808 | switch (multi_scan(wait_strings, need_artificial_trap == 0)) |
5905161c | 809 | { |
16f6ab6b | 810 | case 0: /* breakpoint case */ |
be58e87e | 811 | WSETSTOP ((*status), SIGTRAP); |
16f6ab6b RP |
812 | /* user output from the target can be discarded here. (?) */ |
813 | expect_prompt(); | |
814 | break; | |
815 | ||
816 | case 1: /* bus error */ | |
817 | WSETSTOP ((*status), SIGBUS); | |
818 | /* user output from the target can be discarded here. (?) */ | |
819 | expect_prompt(); | |
820 | break; | |
821 | ||
822 | case 2: /* normal case */ | |
823 | if (need_artificial_trap != 0) | |
824 | { | |
825 | /* stepping */ | |
826 | WSETSTOP ((*status), SIGTRAP); | |
827 | need_artificial_trap--; | |
828 | break; | |
829 | } | |
830 | else | |
831 | { | |
832 | /* exit case */ | |
833 | WSETEXIT ((*status), 0); | |
834 | break; | |
835 | } | |
be58e87e | 836 | |
16f6ab6b RP |
837 | case -1: /* trouble */ |
838 | default: | |
839 | fprintf_filtered (stderr, | |
840 | "Trouble reading target during wait\n"); | |
841 | break; | |
842 | } | |
5905161c RP |
843 | |
844 | timeout = old_timeout; | |
845 | immediate_quit = old_immediate_quit; | |
846 | return 0; | |
847 | } | |
848 | ||
849 | /* Return the name of register number REGNO | |
850 | in the form input and output by bug. | |
851 | ||
852 | Returns a pointer to a static buffer containing the answer. */ | |
853 | static char * | |
854 | get_reg_name (regno) | |
855 | int regno; | |
856 | { | |
857 | static char *rn[] = { | |
858 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", | |
859 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
860 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
861 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
862 | ||
863 | /* these get confusing because we omit a few and switch some ordering around. */ | |
864 | ||
865 | "cr01", /* 32 = psr */ | |
866 | "fcr62", /* 33 = fpsr*/ | |
867 | "fcr63", /* 34 = fpcr */ | |
be58e87e RP |
868 | "ip", /* this is something of a cheat. */ |
869 | /* 35 = sxip */ | |
5905161c RP |
870 | "cr05", /* 36 = snip */ |
871 | "cr06", /* 37 = sfip */ | |
872 | }; | |
873 | ||
874 | return rn[regno]; | |
875 | } | |
876 | ||
877 | static int | |
5905161c RP |
878 | bug_write (a, l) |
879 | char *a; | |
be58e87e | 880 | int l; |
5905161c RP |
881 | { |
882 | int i; | |
883 | ||
884 | SERIAL_WRITE (desc, a, l); | |
885 | ||
b11d53ba | 886 | if (remote_debug) |
5905161c RP |
887 | for (i = 0; i < l; i++) |
888 | { | |
889 | printf ("%c", a[i]); | |
890 | } | |
be58e87e RP |
891 | |
892 | return(0); | |
5905161c RP |
893 | } |
894 | ||
be58e87e | 895 | static void |
5905161c RP |
896 | bug_write_cr (s) |
897 | char *s; | |
898 | { | |
899 | bug_write (s, strlen (s)); | |
900 | bug_write ("\r", 1); | |
be58e87e RP |
901 | return; |
902 | } | |
903 | ||
16f6ab6b | 904 | #if 0 /* not currently used */ |
be58e87e RP |
905 | /* Read from remote while the input matches STRING. Return zero on |
906 | success, -1 on failure. */ | |
907 | ||
908 | static int | |
909 | bug_scan (s) | |
910 | char *s; | |
911 | { | |
912 | int c; | |
913 | ||
914 | while (*s) | |
915 | { | |
916 | c = readchar(); | |
917 | if (c != *s++) | |
918 | { | |
919 | fflush(stdout); | |
920 | printf("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
921 | return(-1); | |
922 | } | |
923 | } | |
924 | ||
925 | return(0); | |
926 | } | |
16f6ab6b | 927 | #endif /* never */ |
be58e87e RP |
928 | |
929 | static int | |
930 | bug_srec_write_cr (s) | |
931 | char *s; | |
932 | { | |
933 | char *p = s; | |
934 | ||
935 | if (srec_echo_pace) | |
936 | for (p = s; *p; ++p) | |
937 | { | |
b11d53ba | 938 | if (remote_debug) |
be58e87e RP |
939 | printf ("%c", *p); |
940 | ||
941 | do | |
942 | SERIAL_WRITE(desc, p, 1); | |
943 | while (readchar_nofail() != *p); | |
944 | } | |
945 | else | |
946 | { | |
947 | bug_write_cr (s); | |
948 | /* return(bug_scan (s) || bug_scan ("\n")); */ | |
949 | } | |
950 | ||
951 | return(0); | |
5905161c RP |
952 | } |
953 | ||
954 | /* Store register REGNO, or all if REGNO == -1. */ | |
955 | ||
956 | static void | |
957 | bug_fetch_register(regno) | |
958 | int regno; | |
959 | { | |
960 | REGISTER_TYPE regval; | |
961 | check_open(); | |
962 | ||
963 | if (regno == -1) | |
964 | { | |
965 | int i; | |
966 | ||
967 | for (i = 0; i < NUM_REGS; ++i) | |
968 | bug_fetch_register(i); | |
969 | } | |
970 | else | |
971 | { | |
972 | bug_write("rs ", 3); | |
973 | bug_write_cr(get_reg_name(regno)); | |
974 | expect("="); | |
975 | regval = get_hex_word(); | |
976 | expect_prompt(); | |
977 | ||
978 | /* the following registers contain flag bits in the lower to bit slots. | |
979 | Mask them off */ | |
980 | if (regno == PC_REGNUM /* aka sxip */ | |
981 | || regno == NPC_REGNUM /* aka snip */ | |
982 | || regno == SFIP_REGNUM) /* aka sfip */ | |
983 | regval &= ~0x3; | |
984 | ||
985 | supply_register(regno, (char *) ®val); | |
986 | } | |
987 | ||
988 | return; | |
989 | } | |
990 | ||
991 | /* Store register REGNO, or all if REGNO == -1. */ | |
992 | ||
993 | static void | |
994 | bug_store_register (regno) | |
995 | int regno; | |
996 | { | |
5905161c RP |
997 | char buffer[1024]; |
998 | check_open(); | |
999 | ||
1000 | if (regno == -1) | |
1001 | { | |
1002 | int i; | |
1003 | ||
1004 | for (i = 0; i < NUM_REGS; ++i) | |
1005 | bug_store_register(i); | |
1006 | } | |
1007 | else | |
1008 | { | |
1009 | char *regname; | |
1010 | ||
be58e87e | 1011 | regname = (get_reg_name(regno)); |
5905161c RP |
1012 | |
1013 | sprintf(buffer, "rs %s %08x", | |
1014 | regname, | |
1015 | read_register(regno)); | |
1016 | ||
1017 | bug_write_cr(buffer); | |
1018 | expect_prompt(); | |
1019 | } | |
1020 | ||
1021 | return; | |
1022 | } | |
1023 | ||
1024 | /* Get ready to modify the registers array. On machines which store | |
1025 | individual registers, this doesn't need to do anything. On machines | |
1026 | which store all the registers in one fell swoop, this makes sure | |
1027 | that registers contains all the registers from the program being | |
1028 | debugged. */ | |
1029 | ||
1030 | void | |
1031 | bug_prepare_to_store () | |
1032 | { | |
1033 | /* Do nothing, since we can store individual regs */ | |
1034 | } | |
1035 | ||
5905161c RP |
1036 | /* Read a word from remote address ADDR and return it. |
1037 | * This goes through the data cache. | |
1038 | */ | |
1039 | int | |
1040 | bug_fetch_word (addr) | |
1041 | CORE_ADDR addr; | |
1042 | { | |
1043 | return dcache_fetch (addr); | |
1044 | } | |
1045 | ||
1046 | /* Write a word WORD into remote address ADDR. | |
1047 | This goes through the data cache. */ | |
1048 | ||
1049 | void | |
1050 | bug_store_word (addr, word) | |
1051 | CORE_ADDR addr; | |
1052 | int word; | |
1053 | { | |
1054 | dcache_poke (addr, word); | |
1055 | } | |
1056 | ||
1057 | int | |
1058 | bug_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
1059 | CORE_ADDR memaddr; | |
1060 | char *myaddr; | |
1061 | int len; | |
1062 | int write; | |
1063 | struct target_ops *target; /* ignored */ | |
1064 | { | |
1065 | register int i; | |
1066 | ||
1067 | /* Round starting address down to longword boundary. */ | |
1068 | register CORE_ADDR addr; | |
1069 | ||
1070 | /* Round ending address up; get number of longwords that makes. */ | |
1071 | register int count; | |
1072 | ||
1073 | /* Allocate buffer of that many longwords. */ | |
1074 | register int *buffer; | |
1075 | ||
1076 | addr = memaddr & -sizeof (int); | |
1077 | count = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
1078 | ||
1079 | buffer = (int *) alloca (count * sizeof (int)); | |
1080 | ||
1081 | if (write) | |
1082 | { | |
1083 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
1084 | ||
1085 | if (addr != memaddr || len < (int) sizeof (int)) | |
1086 | { | |
1087 | /* Need part of initial word -- fetch it. */ | |
1088 | buffer[0] = bug_fetch_word (addr); | |
1089 | } | |
1090 | ||
1091 | if (count > 1) /* FIXME, avoid if even boundary */ | |
1092 | { | |
1093 | buffer[count - 1] | |
1094 | = bug_fetch_word (addr + (count - 1) * sizeof (int)); | |
1095 | } | |
1096 | ||
1097 | /* Copy data to be written over corresponding part of buffer */ | |
1098 | ||
1099 | bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
1100 | ||
1101 | /* Write the entire buffer. */ | |
1102 | ||
1103 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
1104 | { | |
1105 | errno = 0; | |
1106 | bug_store_word (addr, buffer[i]); | |
1107 | if (errno) | |
1108 | { | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | } | |
1114 | } | |
1115 | else | |
1116 | { | |
1117 | /* Read all the longwords */ | |
1118 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
1119 | { | |
1120 | errno = 0; | |
1121 | buffer[i] = bug_fetch_word (addr); | |
1122 | if (errno) | |
1123 | { | |
1124 | return 0; | |
1125 | } | |
1126 | QUIT; | |
1127 | } | |
1128 | ||
1129 | /* Copy appropriate bytes out of the buffer. */ | |
1130 | bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); | |
1131 | } | |
1132 | ||
1133 | return len; | |
1134 | } | |
1135 | ||
be58e87e RP |
1136 | static void |
1137 | start_load() | |
1138 | { | |
1139 | char *command; | |
1140 | ||
1141 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
1142 | ||
1143 | bug_write_cr (command); | |
1144 | expect (command); | |
1145 | expect ("\r\n"); | |
1146 | bug_srec_write_cr ("S0030000FC"); | |
1147 | return; | |
1148 | } | |
1149 | ||
1150 | /* This is an extremely vulnerable and fragile function. I've made | |
1151 | considerable attempts to make this deterministic, but I've | |
1152 | certainly forgotten something. The trouble is that S-records are | |
1153 | only a partial file format, not a protocol. Worse, apparently the | |
1154 | m88k bug monitor does not run in real time while receiving | |
1155 | S-records. Hence, we must pay excruciating attention to when and | |
1156 | where error messages are returned, and what has actually been sent. | |
5905161c | 1157 | |
be58e87e RP |
1158 | Each call represents a chunk of memory to be sent to the target. |
1159 | We break that chunk into an S0 header record, some number of S3 | |
1160 | data records each containing srec_bytes, and an S7 termination | |
1161 | record. */ | |
1162 | ||
16f6ab6b RP |
1163 | static char *srecord_strings[] = { |
1164 | "S-RECORD", | |
1165 | "8???-Bug>", | |
1166 | NULL, | |
1167 | }; | |
1168 | ||
be58e87e | 1169 | static int |
5905161c RP |
1170 | bug_write_inferior_memory (memaddr, myaddr, len) |
1171 | CORE_ADDR memaddr; | |
1172 | unsigned char *myaddr; | |
1173 | int len; | |
1174 | { | |
1175 | int done; | |
5905161c | 1176 | int checksum; |
be58e87e RP |
1177 | int x; |
1178 | int retries; | |
1179 | char buffer[(srec_bytes + 8) << 1]; | |
5905161c | 1180 | |
be58e87e | 1181 | retries = 0; |
5905161c | 1182 | |
be58e87e | 1183 | do |
5905161c | 1184 | { |
be58e87e RP |
1185 | done = 0; |
1186 | ||
1187 | if (retries > srec_max_retries) | |
1188 | return(-1); | |
1189 | ||
1190 | if (retries > 0) | |
5905161c | 1191 | { |
b11d53ba | 1192 | if (remote_debug) |
be58e87e RP |
1193 | printf("\n<retrying...>\n"); |
1194 | ||
1195 | /* This expect_prompt call is extremely important. Without | |
1196 | it, we will tend to resend our packet so fast that it | |
1197 | will arrive before the bug monitor is ready to receive | |
1198 | it. This would lead to a very ugly resend loop. */ | |
1199 | ||
1200 | expect_prompt(); | |
5905161c | 1201 | } |
5905161c | 1202 | |
be58e87e RP |
1203 | start_load(); |
1204 | ||
1205 | while (done < len) | |
1206 | { | |
1207 | int thisgo; | |
1208 | int idx; | |
1209 | char *buf = buffer; | |
1210 | CORE_ADDR address; | |
1211 | ||
1212 | checksum = 0; | |
1213 | thisgo = len - done; | |
1214 | if (thisgo > srec_bytes) | |
1215 | thisgo = srec_bytes; | |
1216 | ||
1217 | address = memaddr + done; | |
1218 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
1219 | buf += 12; | |
1220 | ||
1221 | checksum += (thisgo + 4 + 1 | |
1222 | + (address & 0xff) | |
1223 | + ((address >> 8) & 0xff) | |
1224 | + ((address >> 16) & 0xff) | |
1225 | + ((address >> 24) & 0xff)); | |
1226 | ||
1227 | for (idx = 0; idx < thisgo; idx++) | |
1228 | { | |
1229 | sprintf (buf, "%02X", myaddr[idx + done]); | |
1230 | checksum += myaddr[idx + done]; | |
1231 | buf += 2; | |
1232 | } | |
1233 | ||
1234 | if (srec_noise > 0) | |
1235 | { | |
1236 | /* FIXME-NOW: insert a deliberate error every now and then. | |
1237 | This is intended for testing/debugging the error handling | |
1238 | stuff. */ | |
1239 | static int counter = 0; | |
1240 | if (++counter > srec_noise) | |
1241 | { | |
1242 | counter = 0; | |
1243 | ++checksum; | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | sprintf(buf, "%02X", ~checksum & 0xff); | |
1248 | bug_srec_write_cr (buffer); | |
1249 | ||
1250 | if (srec_sleep != 0) | |
1251 | sleep(srec_sleep); | |
1252 | ||
16f6ab6b | 1253 | /* This pollchar is probably redundant to the multi_scan |
be58e87e RP |
1254 | below. Trouble is, we can't be sure when or where an |
1255 | error message will appear. Apparently, when running at | |
1256 | full speed from a typical sun4, error messages tend to | |
1257 | appear to arrive only *after* the s7 record. */ | |
1258 | ||
1259 | if ((x = pollchar()) != 0) | |
1260 | { | |
b11d53ba | 1261 | if (remote_debug) |
be58e87e RP |
1262 | printf("\n<retrying...>\n"); |
1263 | ||
1264 | ++retries; | |
1265 | ||
1266 | /* flush any remaining input and verify that we are back | |
1267 | at the prompt level. */ | |
1268 | expect_prompt(); | |
1269 | /* start all over again. */ | |
1270 | start_load(); | |
1271 | done = 0; | |
1272 | continue; | |
1273 | } | |
1274 | ||
1275 | done += thisgo; | |
1276 | } | |
1277 | ||
1278 | bug_srec_write_cr("S7060000000000F9"); | |
1279 | ++retries; | |
1280 | ||
1281 | /* Having finished the load, we need to figure out whether we | |
1282 | had any errors. */ | |
16f6ab6b | 1283 | } while (multi_scan(srecord_strings, 0) == 0);; |
be58e87e RP |
1284 | |
1285 | return(0); | |
5905161c RP |
1286 | } |
1287 | ||
1288 | void | |
1289 | bug_files_info () | |
1290 | { | |
1291 | char *file = "nothing"; | |
1292 | ||
1293 | if (exec_bfd) | |
1294 | file = bfd_get_filename (exec_bfd); | |
1295 | ||
1296 | if (exec_bfd) | |
1297 | #ifdef __GO32__ | |
1298 | printf_filtered ("\tAttached to DOS asynctsr and running program %s\n", file); | |
1299 | #else | |
1300 | printf_filtered ("\tAttached to %s at %d baud and running program %s\n", dev_name, baudrate, file); | |
1301 | #endif | |
1302 | printf_filtered ("\ton an m88k processor.\n"); | |
1303 | } | |
1304 | ||
1305 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
1306 | to inferior's memory at MEMADDR. Returns errno value. | |
1307 | * sb/sh instructions don't work on unaligned addresses, when TU=1. | |
1308 | */ | |
1309 | ||
1310 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
1311 | at debugger address MYADDR. Returns errno value. */ | |
be58e87e | 1312 | static int |
5905161c RP |
1313 | bug_read_inferior_memory (memaddr, myaddr, len) |
1314 | CORE_ADDR memaddr; | |
1315 | char *myaddr; | |
1316 | int len; | |
1317 | { | |
1318 | char request[100]; | |
1319 | char *buffer; | |
1320 | char *p; | |
1321 | char type; | |
1322 | char size; | |
1323 | unsigned char c; | |
1324 | unsigned int inaddr; | |
1325 | unsigned int checksum; | |
1326 | ||
1327 | sprintf(request, "du 0 %x:&%d", memaddr, len); | |
1328 | bug_write_cr(request); | |
1329 | ||
1330 | p = buffer = alloca(len); | |
1331 | ||
1332 | /* scan up through the header */ | |
1333 | expect("S0030000FC"); | |
1334 | ||
1335 | while (p < buffer + len) | |
1336 | { | |
1337 | /* scan off any white space. */ | |
1338 | while (readchar() != 'S') ;; | |
1339 | ||
1340 | /* what kind of s-rec? */ | |
1341 | type = readchar(); | |
1342 | ||
1343 | /* scan record size */ | |
1344 | get_hex_byte(&size); | |
1345 | checksum = size; | |
1346 | --size; | |
1347 | inaddr = 0; | |
1348 | ||
1349 | switch (type) | |
1350 | { | |
1351 | case '7': | |
1352 | case '8': | |
1353 | case '9': | |
1354 | goto done; | |
1355 | ||
1356 | case '3': | |
1357 | get_hex_byte(&c); | |
1358 | inaddr = (inaddr << 8) + c; | |
1359 | checksum += c; | |
1360 | --size; | |
1361 | /* intentional fall through */ | |
1362 | case '2': | |
1363 | get_hex_byte(&c); | |
1364 | inaddr = (inaddr << 8) + c; | |
1365 | checksum += c; | |
1366 | --size; | |
1367 | /* intentional fall through */ | |
1368 | case '1': | |
1369 | get_hex_byte(&c); | |
1370 | inaddr = (inaddr << 8) + c; | |
1371 | checksum += c; | |
1372 | --size; | |
1373 | get_hex_byte(&c); | |
1374 | inaddr = (inaddr << 8) + c; | |
1375 | checksum += c; | |
1376 | --size; | |
1377 | break; | |
1378 | ||
1379 | default: | |
1380 | /* bonk */ | |
1381 | error("reading s-records."); | |
1382 | } | |
1383 | ||
1384 | if (inaddr < memaddr | |
1385 | || (memaddr + len) < (inaddr + size)) | |
1386 | error("srec out of memory range."); | |
1387 | ||
1388 | if (p != buffer + inaddr - memaddr) | |
1389 | error("srec out of sequence."); | |
1390 | ||
1391 | for (; size; --size, ++p) | |
1392 | { | |
1393 | get_hex_byte(p); | |
1394 | checksum += *p; | |
1395 | } | |
1396 | ||
1397 | get_hex_byte(&c); | |
1398 | if (c != (~checksum & 0xff)) | |
1399 | error("bad s-rec checksum"); | |
1400 | } | |
1401 | ||
1402 | done: | |
1403 | expect_prompt(); | |
1404 | if (p != buffer + len) | |
1405 | return(1); | |
1406 | ||
1407 | memcpy(myaddr, buffer, len); | |
1408 | return(0); | |
1409 | } | |
1410 | ||
5905161c RP |
1411 | #define MAX_BREAKS 16 |
1412 | static int num_brkpts = 0; | |
1413 | static int | |
1414 | bug_insert_breakpoint (addr, save) | |
1415 | CORE_ADDR addr; | |
1416 | char *save; /* Throw away, let bug save instructions */ | |
1417 | { | |
1418 | check_open (); | |
1419 | ||
1420 | if (num_brkpts < MAX_BREAKS) | |
1421 | { | |
1422 | char buffer[100]; | |
1423 | ||
1424 | num_brkpts++; | |
1425 | sprintf (buffer, "br %x", addr); | |
1426 | bug_write_cr (buffer); | |
1427 | expect_prompt (); | |
1428 | return(0); | |
1429 | } | |
1430 | else | |
1431 | { | |
1432 | fprintf_filtered (stderr, | |
1433 | "Too many break points, break point not installed\n"); | |
1434 | return(1); | |
1435 | } | |
1436 | ||
1437 | } | |
1438 | static int | |
1439 | bug_remove_breakpoint (addr, save) | |
1440 | CORE_ADDR addr; | |
1441 | char *save; /* Throw away, let bug save instructions */ | |
1442 | { | |
1443 | if (num_brkpts > 0) | |
1444 | { | |
1445 | char buffer[100]; | |
1446 | ||
1447 | num_brkpts--; | |
1448 | sprintf (buffer, "nobr %x", addr); | |
1449 | bug_write_cr (buffer); | |
1450 | expect_prompt (); | |
1451 | ||
1452 | } | |
1453 | return (0); | |
1454 | } | |
1455 | ||
1456 | /* Clear the bugs notion of what the break points are */ | |
1457 | static int | |
1458 | bug_clear_breakpoints () | |
1459 | { | |
1460 | ||
1461 | if (is_open) | |
1462 | { | |
1463 | bug_write_cr ("nobr"); | |
be58e87e | 1464 | expect("nobr"); |
5905161c RP |
1465 | expect_prompt (); |
1466 | } | |
1467 | num_brkpts = 0; | |
be58e87e | 1468 | return(0); |
5905161c | 1469 | } |
be58e87e | 1470 | |
5905161c RP |
1471 | static void |
1472 | bug_mourn () | |
1473 | { | |
1474 | bug_clear_breakpoints (); | |
1475 | generic_mourn_inferior (); | |
1476 | } | |
1477 | ||
1478 | /* Put a command string, in args, out to the bug. The bug is assumed to | |
1479 | be in raw mode, all writing/reading done through desc. | |
1480 | Ouput from the bug is placed on the users terminal until the | |
1481 | prompt from the bug is seen. | |
1482 | FIXME: Can't handle commands that take input. */ | |
1483 | ||
1484 | void | |
1485 | bug_com (args, fromtty) | |
1486 | char *args; | |
1487 | int fromtty; | |
1488 | { | |
1489 | check_open (); | |
1490 | ||
1491 | if (!args) | |
1492 | return; | |
1493 | ||
1494 | /* Clear all input so only command relative output is displayed */ | |
1495 | ||
1496 | bug_write_cr (args); | |
1497 | bug_write ("\030", 1); | |
1498 | expect_prompt (); | |
1499 | } | |
1500 | ||
be58e87e RP |
1501 | static void |
1502 | bug_device (args, fromtty) | |
1503 | char *args; | |
1504 | int fromtty; | |
5905161c | 1505 | { |
be58e87e RP |
1506 | if (args) |
1507 | dev_name = get_word (&args); | |
1508 | ||
1509 | return; | |
5905161c RP |
1510 | } |
1511 | ||
1512 | #if 0 | |
1513 | static | |
1514 | bug_speed (s) | |
1515 | char *s; | |
1516 | { | |
1517 | check_open (); | |
1518 | ||
1519 | if (s) | |
1520 | { | |
1521 | char buffer[100]; | |
1522 | int newrate = atoi (s); | |
1523 | int which = 0; | |
1524 | ||
1525 | if (SERIAL_SETBAUDRATE (desc, newrate)) | |
1526 | error ("Can't use %d baud\n", newrate); | |
1527 | ||
1528 | printf_filtered ("Checking target is in sync\n"); | |
1529 | ||
1530 | printf_filtered ("Sending commands to set target to %d\n", | |
1531 | baudrate); | |
1532 | ||
1533 | sprintf (buffer, "tm %d. N 8 1", baudrate); | |
1534 | bug_write_cr (buffer); | |
1535 | } | |
1536 | } | |
1537 | #endif /* 0 */ | |
1538 | ||
ae87844d | 1539 | struct target_ops bug_ops = |
5905161c RP |
1540 | { |
1541 | "bug", "Remote BUG monitor", | |
1542 | "Use the mvme187 board running the BUG monitor connected\n\ | |
1543 | by a serial line.", | |
1544 | ||
1545 | bug_open, bug_close, | |
1546 | 0, bug_detach, bug_resume, bug_wait, /* attach */ | |
1547 | bug_fetch_register, bug_store_register, | |
1548 | bug_prepare_to_store, | |
1549 | bug_xfer_inferior_memory, | |
1550 | bug_files_info, | |
1551 | bug_insert_breakpoint, bug_remove_breakpoint, /* Breakpoints */ | |
1552 | 0, 0, 0, 0, 0, /* Terminal handling */ | |
1553 | bug_kill, /* FIXME, kill */ | |
1554 | bug_load, | |
1555 | 0, /* lookup_symbol */ | |
1556 | bug_create_inferior, /* create_inferior */ | |
1557 | bug_mourn, /* mourn_inferior FIXME */ | |
1558 | 0, /* can_run */ | |
1559 | 0, /* notice_signals */ | |
1560 | process_stratum, 0, /* next */ | |
1561 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ | |
1562 | 0, 0, /* Section pointers */ | |
1563 | OPS_MAGIC, /* Always the last thing */ | |
1564 | }; | |
1565 | ||
1566 | void | |
1567 | _initialize_remote_bug () | |
1568 | { | |
1569 | add_target (&bug_ops); | |
1570 | ||
1571 | add_com ("bug <command>", class_obscure, bug_com, | |
1572 | "Send a command to the BUG monitor."); | |
5905161c RP |
1573 | |
1574 | add_com ("device", class_obscure, bug_device, | |
1575 | "Set the terminal line for BUG communications"); | |
1576 | ||
1577 | #if 0 | |
1578 | add_com ("speed", class_obscure, bug_speed, | |
1579 | "Set the terminal line speed for BUG communications"); | |
1580 | #endif /* 0 */ | |
1581 | ||
be58e87e RP |
1582 | add_show_from_set |
1583 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
1584 | (char *) &srec_bytes, | |
1585 | "\ | |
1586 | Set the number of bytes represented in each S-record.\n\ | |
1587 | This affects the communication protocol with the remote target.", | |
1588 | &setlist), | |
1589 | &showlist); | |
1590 | ||
1591 | add_show_from_set | |
1592 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
1593 | (char *) &srec_max_retries, | |
1594 | "\ | |
1595 | Set the number of retries for shipping S-records.\n\ | |
1596 | This affects the communication protocol with the remote target.", | |
1597 | &setlist), | |
1598 | &showlist); | |
1599 | ||
1600 | add_show_from_set | |
1601 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
1602 | (char *) &srec_frame, | |
1603 | "\ | |
1604 | Set the number of bytes in an S-record frame.\n\ | |
1605 | This affects the communication protocol with the remote target.", | |
1606 | &setlist), | |
1607 | &showlist); | |
1608 | ||
1609 | add_show_from_set | |
1610 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1611 | (char *) &srec_noise, | |
1612 | "\ | |
1613 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1614 | Zero means flub none at all. This affects the communication protocol\n\ | |
1615 | with the remote target.", | |
1616 | &setlist), | |
1617 | &showlist); | |
1618 | ||
1619 | add_show_from_set | |
1620 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1621 | (char *) &srec_sleep, | |
1622 | "\ | |
1623 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1624 | This affects the communication protocol with the remote target.", | |
1625 | &setlist), | |
1626 | &showlist); | |
1627 | ||
1628 | add_show_from_set | |
1629 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1630 | (char *) &srec_echo_pace, | |
1631 | "\ | |
1632 | Set echo-verification.\n\ | |
1633 | When on, use verification by echo when downloading S-records. This is\n\ | |
1634 | much slower, but generally more reliable.", | |
1635 | &setlist), | |
1636 | &showlist); | |
1637 | ||
5905161c RP |
1638 | dev_name = NULL; |
1639 | } |