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" | |
be58e87e | 26 | |
5905161c RP |
27 | #include <string.h> |
28 | #include <ctype.h> | |
29 | #include <fcntl.h> | |
30 | #include <signal.h> | |
31 | #include <setjmp.h> | |
32 | #include <errno.h> | |
be58e87e | 33 | |
5905161c | 34 | #include "terminal.h" |
5905161c | 35 | #include "gdbcore.h" |
be58e87e RP |
36 | #include "gdbcmd.h" |
37 | ||
c6f494e8 | 38 | #include "remote-utils.h" |
755892d6 | 39 | |
be58e87e | 40 | extern int sleep(); |
5905161c RP |
41 | |
42 | /* External data declarations */ | |
43 | extern int stop_soon_quietly; /* for wait_for_inferior */ | |
44 | ||
45 | /* Forward data declarations */ | |
ae87844d | 46 | extern struct target_ops bug_ops; /* Forward declaration */ |
5905161c RP |
47 | |
48 | /* Forward function declarations */ | |
755892d6 | 49 | static int bug_clear_breakpoints PARAMS((void)); |
be58e87e | 50 | |
c6f494e8 | 51 | static int bug_read_memory PARAMS((CORE_ADDR memaddr, |
755892d6 RP |
52 | unsigned char *myaddr, |
53 | int len)); | |
be58e87e | 54 | |
c6f494e8 | 55 | static int bug_write_memory PARAMS((CORE_ADDR memaddr, |
755892d6 RP |
56 | unsigned char *myaddr, |
57 | int len)); | |
be58e87e | 58 | |
be58e87e RP |
59 | /* This variable is somewhat arbitrary. It's here so that it can be |
60 | set from within a running gdb. */ | |
61 | ||
62 | static int srec_max_retries = 3; | |
63 | ||
64 | /* Each S-record download to the target consists of an S0 header | |
65 | record, some number of S3 data records, and one S7 termination | |
66 | record. I call this download a "frame". Srec_frame says how many | |
67 | bytes will be represented in each frame. */ | |
68 | ||
69 | static int srec_frame = 160; | |
70 | ||
71 | /* This variable determines how many bytes will be represented in each | |
72 | S3 s-record. */ | |
73 | ||
74 | static int srec_bytes = 40; | |
75 | ||
76 | /* At one point it appeared to me as though the bug monitor could not | |
77 | really be expected to receive two sequential characters at 9600 | |
78 | baud reliably. Echo-pacing is an attempt to force data across the | |
79 | line even in this condition. Specifically, in echo-pace mode, each | |
80 | character is sent one at a time and we look for the echo before | |
81 | sending the next. This is excruciatingly slow. */ | |
5905161c | 82 | |
be58e87e RP |
83 | static int srec_echo_pace = 0; |
84 | ||
85 | /* How long to wait after an srec for a possible error message. | |
86 | Similar to the above, I tried sleeping after sending each S3 record | |
87 | in hopes that I might actually see error messages from the bug | |
88 | monitor. This might actually work if we were to use sleep | |
89 | intervals smaller than 1 second. */ | |
90 | ||
91 | static int srec_sleep = 0; | |
92 | ||
93 | /* Every srec_noise records, flub the checksum. This is a debugging | |
94 | feature. Set the variable to something other than 1 in order to | |
95 | inject *deliberate* checksum errors. One might do this if one | |
96 | wanted to test error handling and recovery. */ | |
97 | ||
98 | static int srec_noise = 0; | |
5905161c | 99 | |
5905161c RP |
100 | /* Called when SIGALRM signal sent due to alarm() timeout. */ |
101 | ||
102 | /* Number of SIGTRAPs we need to simulate. That is, the next | |
103 | NEED_ARTIFICIAL_TRAP calls to bug_wait should just return | |
104 | SIGTRAP without actually waiting for anything. */ | |
105 | ||
106 | static int need_artificial_trap = 0; | |
107 | ||
5905161c RP |
108 | /* |
109 | * Download a file specified in 'args', to the bug. | |
110 | */ | |
be58e87e | 111 | |
5905161c RP |
112 | static void |
113 | bug_load (args, fromtty) | |
114 | char *args; | |
115 | int fromtty; | |
116 | { | |
117 | bfd *abfd; | |
118 | asection *s; | |
5905161c RP |
119 | char buffer[1024]; |
120 | ||
c6f494e8 | 121 | sr_check_open (); |
5905161c | 122 | |
c6f494e8 | 123 | dcache_flush (gr_get_dcache()); |
5905161c RP |
124 | inferior_pid = 0; |
125 | abfd = bfd_openr (args, 0); | |
126 | if (!abfd) | |
127 | { | |
128 | printf_filtered ("Unable to open file %s\n", args); | |
129 | return; | |
130 | } | |
131 | ||
132 | if (bfd_check_format (abfd, bfd_object) == 0) | |
133 | { | |
134 | printf_filtered ("File is not an object file\n"); | |
135 | return; | |
136 | } | |
137 | ||
138 | s = abfd->sections; | |
139 | while (s != (asection *) NULL) | |
140 | { | |
141 | if (s->flags & SEC_LOAD) | |
142 | { | |
143 | int i; | |
144 | ||
be58e87e | 145 | char *buffer = xmalloc (srec_frame); |
5905161c RP |
146 | |
147 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size); | |
be58e87e RP |
148 | fflush (stdout); |
149 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
5905161c | 150 | { |
be58e87e RP |
151 | if (srec_frame > s->_raw_size - i) |
152 | srec_frame = s->_raw_size - i; | |
5905161c | 153 | |
be58e87e | 154 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); |
c6f494e8 | 155 | bug_write_memory (s->vma + i, buffer, srec_frame); |
5905161c RP |
156 | printf_filtered ("*"); |
157 | fflush (stdout); | |
158 | } | |
159 | printf_filtered ("\n"); | |
160 | free (buffer); | |
161 | } | |
162 | s = s->next; | |
163 | } | |
be58e87e | 164 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); |
c6f494e8 RP |
165 | sr_write_cr (buffer); |
166 | gr_expect_prompt (); | |
5905161c RP |
167 | } |
168 | ||
c6f494e8 | 169 | #if 0 |
5905161c RP |
170 | static char * |
171 | get_word (p) | |
172 | char **p; | |
173 | { | |
174 | char *s = *p; | |
175 | char *word; | |
176 | char *copy; | |
177 | size_t len; | |
178 | ||
179 | while (isspace (*s)) | |
180 | s++; | |
181 | ||
182 | word = s; | |
183 | ||
184 | len = 0; | |
185 | ||
186 | while (*s && !isspace (*s)) | |
187 | { | |
188 | s++; | |
189 | len++; | |
190 | ||
191 | } | |
192 | copy = xmalloc (len + 1); | |
193 | memcpy (copy, word, len); | |
194 | copy[len] = 0; | |
195 | *p = s; | |
196 | return copy; | |
197 | } | |
c6f494e8 | 198 | #endif |
5905161c | 199 | |
c6f494e8 RP |
200 | static struct gr_settings bug_settings = { |
201 | NULL, /* dcache */ | |
202 | "Bug>", /* prompt */ | |
203 | &bug_ops, /* ops */ | |
204 | bug_clear_breakpoints, /* clear_all_breakpoints */ | |
205 | bug_read_memory, /* readfunc */ | |
206 | bug_write_memory, /* writefunc */ | |
207 | gr_generic_checkin, /* checkin */ | |
208 | }; | |
5905161c | 209 | |
c6f494e8 RP |
210 | static char *cpu_check_strings[] = { |
211 | "=", | |
212 | "Invalid Register", | |
213 | }; | |
5905161c RP |
214 | |
215 | static void | |
c6f494e8 | 216 | bug_open (args, from_tty) |
5905161c RP |
217 | char *args; |
218 | int from_tty; | |
219 | { | |
c6f494e8 RP |
220 | if (args == NULL) |
221 | args = ""; | |
5905161c | 222 | |
c6f494e8 RP |
223 | gr_open(args, from_tty, &bug_settings); |
224 | /* decide *now* whether we are on an 88100 or an 88110 */ | |
225 | sr_write_cr("rs cr06"); | |
226 | sr_expect("rs cr06"); | |
5905161c | 227 | |
817ac7f8 | 228 | switch (gr_multi_scan(cpu_check_strings, 0)) |
c6f494e8 RP |
229 | { |
230 | case 0: /* this is an m88100 */ | |
231 | target_is_m88110 = 0; | |
232 | break; | |
233 | case 1: /* this is an m88110 */ | |
234 | target_is_m88110 = 1; | |
235 | break; | |
236 | default: | |
237 | abort(); | |
238 | } | |
5905161c RP |
239 | } |
240 | ||
241 | /* Tell the remote machine to resume. */ | |
242 | ||
243 | void | |
be58e87e RP |
244 | bug_resume (pid, step, sig) |
245 | int pid, step, sig; | |
5905161c | 246 | { |
c6f494e8 | 247 | dcache_flush (gr_get_dcache()); |
5905161c RP |
248 | |
249 | if (step) | |
250 | { | |
c6f494e8 | 251 | sr_write_cr("t"); |
5905161c RP |
252 | |
253 | /* Force the next bug_wait to return a trap. Not doing anything | |
254 | about I/O from the target means that the user has to type | |
255 | "continue" to see any. FIXME, this should be fixed. */ | |
256 | need_artificial_trap = 1; | |
257 | } | |
258 | else | |
c6f494e8 | 259 | sr_write_cr ("g"); |
5905161c RP |
260 | |
261 | return; | |
262 | } | |
263 | ||
be58e87e RP |
264 | /* Wait until the remote machine stops, then return, |
265 | storing status in STATUS just as `wait' would. */ | |
266 | ||
16f6ab6b RP |
267 | static char *wait_strings[] = { |
268 | "At Breakpoint", | |
269 | "Exception: Data Access Fault (Local Bus Timeout)", | |
270 | "\r8???-Bug>", | |
c6f494e8 | 271 | "\r197-Bug>", |
16f6ab6b RP |
272 | NULL, |
273 | }; | |
274 | ||
be58e87e | 275 | int |
de43d7d0 SG |
276 | bug_wait (pid, status) |
277 | int pid; | |
be58e87e RP |
278 | WAITTYPE *status; |
279 | { | |
c6f494e8 | 280 | int old_timeout = sr_get_timeout(); |
be58e87e RP |
281 | int old_immediate_quit = immediate_quit; |
282 | ||
283 | WSETEXIT ((*status), 0); | |
284 | ||
16f6ab6b RP |
285 | /* read off leftovers from resume so that the rest can be passed |
286 | back out as stdout. */ | |
287 | if (need_artificial_trap == 0) | |
5905161c | 288 | { |
c6f494e8 RP |
289 | sr_expect("Effective address: "); |
290 | (void) sr_get_hex_word(); | |
291 | sr_expect ("\r\n"); | |
5905161c | 292 | } |
be58e87e | 293 | |
c6f494e8 | 294 | sr_set_timeout(-1); /* Don't time out -- user program is running. */ |
be58e87e RP |
295 | immediate_quit = 1; /* Helps ability to QUIT */ |
296 | ||
c6f494e8 | 297 | switch (gr_multi_scan(wait_strings, need_artificial_trap == 0)) |
5905161c | 298 | { |
16f6ab6b | 299 | case 0: /* breakpoint case */ |
be58e87e | 300 | WSETSTOP ((*status), SIGTRAP); |
16f6ab6b | 301 | /* user output from the target can be discarded here. (?) */ |
c6f494e8 | 302 | gr_expect_prompt(); |
16f6ab6b RP |
303 | break; |
304 | ||
305 | case 1: /* bus error */ | |
306 | WSETSTOP ((*status), SIGBUS); | |
307 | /* user output from the target can be discarded here. (?) */ | |
c6f494e8 | 308 | gr_expect_prompt(); |
16f6ab6b RP |
309 | break; |
310 | ||
311 | case 2: /* normal case */ | |
c6f494e8 | 312 | case 3: |
16f6ab6b RP |
313 | if (need_artificial_trap != 0) |
314 | { | |
315 | /* stepping */ | |
316 | WSETSTOP ((*status), SIGTRAP); | |
317 | need_artificial_trap--; | |
318 | break; | |
319 | } | |
320 | else | |
321 | { | |
322 | /* exit case */ | |
323 | WSETEXIT ((*status), 0); | |
324 | break; | |
325 | } | |
be58e87e | 326 | |
16f6ab6b RP |
327 | case -1: /* trouble */ |
328 | default: | |
329 | fprintf_filtered (stderr, | |
330 | "Trouble reading target during wait\n"); | |
331 | break; | |
332 | } | |
5905161c | 333 | |
c6f494e8 | 334 | sr_set_timeout(old_timeout); |
5905161c RP |
335 | immediate_quit = old_immediate_quit; |
336 | return 0; | |
337 | } | |
338 | ||
339 | /* Return the name of register number REGNO | |
340 | in the form input and output by bug. | |
341 | ||
342 | Returns a pointer to a static buffer containing the answer. */ | |
343 | static char * | |
344 | get_reg_name (regno) | |
345 | int regno; | |
346 | { | |
347 | static char *rn[] = { | |
348 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", | |
349 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
350 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
351 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
352 | ||
353 | /* these get confusing because we omit a few and switch some ordering around. */ | |
354 | ||
355 | "cr01", /* 32 = psr */ | |
356 | "fcr62", /* 33 = fpsr*/ | |
357 | "fcr63", /* 34 = fpcr */ | |
be58e87e RP |
358 | "ip", /* this is something of a cheat. */ |
359 | /* 35 = sxip */ | |
5905161c RP |
360 | "cr05", /* 36 = snip */ |
361 | "cr06", /* 37 = sfip */ | |
c6f494e8 RP |
362 | |
363 | "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07", | |
364 | "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15", | |
365 | "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", | |
366 | "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", | |
5905161c RP |
367 | }; |
368 | ||
369 | return rn[regno]; | |
370 | } | |
371 | ||
16f6ab6b | 372 | #if 0 /* not currently used */ |
be58e87e RP |
373 | /* Read from remote while the input matches STRING. Return zero on |
374 | success, -1 on failure. */ | |
375 | ||
376 | static int | |
377 | bug_scan (s) | |
378 | char *s; | |
379 | { | |
380 | int c; | |
381 | ||
382 | while (*s) | |
383 | { | |
c6f494e8 | 384 | c = sr_readchar(); |
be58e87e RP |
385 | if (c != *s++) |
386 | { | |
387 | fflush(stdout); | |
388 | printf("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
389 | return(-1); | |
390 | } | |
391 | } | |
392 | ||
393 | return(0); | |
394 | } | |
16f6ab6b | 395 | #endif /* never */ |
be58e87e RP |
396 | |
397 | static int | |
398 | bug_srec_write_cr (s) | |
399 | char *s; | |
400 | { | |
401 | char *p = s; | |
402 | ||
403 | if (srec_echo_pace) | |
404 | for (p = s; *p; ++p) | |
405 | { | |
c6f494e8 | 406 | if (sr_get_debug() > 0) |
be58e87e RP |
407 | printf ("%c", *p); |
408 | ||
409 | do | |
c6f494e8 RP |
410 | SERIAL_WRITE(sr_get_desc(), p, 1); |
411 | while (sr_pollchar() != *p); | |
be58e87e RP |
412 | } |
413 | else | |
414 | { | |
c6f494e8 | 415 | sr_write_cr (s); |
be58e87e RP |
416 | /* return(bug_scan (s) || bug_scan ("\n")); */ |
417 | } | |
418 | ||
419 | return(0); | |
5905161c RP |
420 | } |
421 | ||
422 | /* Store register REGNO, or all if REGNO == -1. */ | |
423 | ||
424 | static void | |
425 | bug_fetch_register(regno) | |
426 | int regno; | |
427 | { | |
428 | REGISTER_TYPE regval; | |
c6f494e8 RP |
429 | |
430 | sr_check_open(); | |
5905161c RP |
431 | |
432 | if (regno == -1) | |
433 | { | |
434 | int i; | |
435 | ||
436 | for (i = 0; i < NUM_REGS; ++i) | |
437 | bug_fetch_register(i); | |
438 | } | |
817ac7f8 RP |
439 | else if (target_is_m88110 && regno == SFIP_REGNUM) |
440 | { | |
441 | /* m88110 has no sfip. */ | |
442 | long l = 0; | |
443 | supply_register(regno, (char *) &l); | |
444 | } | |
c6f494e8 | 445 | else if (regno < XFP_REGNUM) |
5905161c | 446 | { |
c6f494e8 RP |
447 | sr_write("rs ", 3); |
448 | sr_write_cr(get_reg_name(regno)); | |
449 | sr_expect("="); | |
450 | regval = sr_get_hex_word(); | |
451 | gr_expect_prompt(); | |
5905161c RP |
452 | supply_register(regno, (char *) ®val); |
453 | } | |
c6f494e8 RP |
454 | else |
455 | { | |
456 | /* Float register so we need to parse a strange data format. */ | |
457 | long p; | |
458 | unsigned char value[10]; | |
459 | ||
460 | sr_write("rs ", 3); | |
461 | sr_write(get_reg_name(regno), strlen(get_reg_name(regno))); | |
462 | sr_write_cr(";d"); | |
463 | sr_expect("rs"); | |
464 | sr_expect(get_reg_name(regno)); | |
465 | sr_expect(";d"); | |
466 | sr_expect("="); | |
467 | ||
468 | /* sign */ | |
469 | p = sr_get_hex_digit(1); | |
470 | value[0] = p << 7; | |
471 | ||
472 | /* exponent */ | |
473 | sr_expect("_"); | |
474 | p = sr_get_hex_digit(1); | |
475 | value[0] += (p << 4); | |
476 | value[0] += sr_get_hex_digit(1); | |
477 | ||
478 | value[1] = sr_get_hex_digit(1) << 4; | |
479 | ||
480 | /* fraction */ | |
481 | sr_expect("_"); | |
482 | value[1] += sr_get_hex_digit(1); | |
483 | ||
484 | value[2] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
485 | value[3] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
486 | value[4] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
487 | value[5] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
488 | value[6] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
489 | value[7] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
490 | value[8] = 0; | |
491 | value[9] = 0; | |
492 | ||
493 | gr_expect_prompt(); | |
494 | supply_register(regno, value); | |
495 | } | |
5905161c RP |
496 | |
497 | return; | |
498 | } | |
499 | ||
500 | /* Store register REGNO, or all if REGNO == -1. */ | |
501 | ||
502 | static void | |
503 | bug_store_register (regno) | |
504 | int regno; | |
505 | { | |
5905161c | 506 | char buffer[1024]; |
c6f494e8 | 507 | sr_check_open(); |
5905161c RP |
508 | |
509 | if (regno == -1) | |
510 | { | |
511 | int i; | |
512 | ||
513 | for (i = 0; i < NUM_REGS; ++i) | |
514 | bug_store_register(i); | |
515 | } | |
516 | else | |
517 | { | |
518 | char *regname; | |
519 | ||
c6f494e8 | 520 | regname = get_reg_name(regno); |
5905161c | 521 | |
817ac7f8 RP |
522 | if (target_is_m88110 && regno == SFIP_REGNUM) |
523 | return; | |
524 | else if (regno < XFP_REGNUM) | |
c6f494e8 RP |
525 | sprintf(buffer, "rs %s %08x", |
526 | regname, | |
527 | read_register(regno)); | |
528 | else | |
529 | { | |
530 | unsigned char *value = ®isters[REGISTER_BYTE(regno)]; | |
531 | ||
817ac7f8 | 532 | sprintf(buffer, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d", |
c6f494e8 RP |
533 | regname, |
534 | /* sign */ | |
535 | (value[0] >> 7) & 0xf, | |
536 | /* exponent */ | |
537 | value[0] & 0x7f, | |
538 | (value[1] >> 8) & 0xf, | |
539 | /* fraction */ | |
540 | value[1] & 0xf, | |
541 | value[2], | |
542 | value[3], | |
543 | value[4], | |
544 | value[5], | |
545 | value[6], | |
546 | value[7]); | |
547 | } | |
5905161c | 548 | |
c6f494e8 RP |
549 | sr_write_cr(buffer); |
550 | gr_expect_prompt(); | |
5905161c RP |
551 | } |
552 | ||
553 | return; | |
554 | } | |
555 | ||
5905161c | 556 | int |
c6f494e8 | 557 | bug_xfer_memory (memaddr, myaddr, len, write, target) |
5905161c RP |
558 | CORE_ADDR memaddr; |
559 | char *myaddr; | |
560 | int len; | |
561 | int write; | |
562 | struct target_ops *target; /* ignored */ | |
563 | { | |
564 | register int i; | |
565 | ||
566 | /* Round starting address down to longword boundary. */ | |
567 | register CORE_ADDR addr; | |
568 | ||
569 | /* Round ending address up; get number of longwords that makes. */ | |
570 | register int count; | |
571 | ||
572 | /* Allocate buffer of that many longwords. */ | |
573 | register int *buffer; | |
574 | ||
575 | addr = memaddr & -sizeof (int); | |
576 | count = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
577 | ||
578 | buffer = (int *) alloca (count * sizeof (int)); | |
579 | ||
580 | if (write) | |
581 | { | |
582 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
583 | ||
584 | if (addr != memaddr || len < (int) sizeof (int)) | |
585 | { | |
586 | /* Need part of initial word -- fetch it. */ | |
c6f494e8 | 587 | buffer[0] = gr_fetch_word (addr); |
5905161c RP |
588 | } |
589 | ||
590 | if (count > 1) /* FIXME, avoid if even boundary */ | |
591 | { | |
592 | buffer[count - 1] | |
c6f494e8 | 593 | = gr_fetch_word (addr + (count - 1) * sizeof (int)); |
5905161c RP |
594 | } |
595 | ||
596 | /* Copy data to be written over corresponding part of buffer */ | |
597 | ||
ade40d31 | 598 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); |
5905161c RP |
599 | |
600 | /* Write the entire buffer. */ | |
601 | ||
602 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
603 | { | |
604 | errno = 0; | |
c6f494e8 | 605 | gr_store_word (addr, buffer[i]); |
5905161c RP |
606 | if (errno) |
607 | { | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | } | |
613 | } | |
614 | else | |
615 | { | |
616 | /* Read all the longwords */ | |
617 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
618 | { | |
619 | errno = 0; | |
c6f494e8 | 620 | buffer[i] = gr_fetch_word (addr); |
5905161c RP |
621 | if (errno) |
622 | { | |
623 | return 0; | |
624 | } | |
625 | QUIT; | |
626 | } | |
627 | ||
628 | /* Copy appropriate bytes out of the buffer. */ | |
ade40d31 | 629 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); |
5905161c RP |
630 | } |
631 | ||
632 | return len; | |
633 | } | |
634 | ||
be58e87e RP |
635 | static void |
636 | start_load() | |
637 | { | |
638 | char *command; | |
639 | ||
640 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
641 | ||
c6f494e8 RP |
642 | sr_write_cr (command); |
643 | sr_expect (command); | |
644 | sr_expect ("\r\n"); | |
be58e87e RP |
645 | bug_srec_write_cr ("S0030000FC"); |
646 | return; | |
647 | } | |
648 | ||
649 | /* This is an extremely vulnerable and fragile function. I've made | |
650 | considerable attempts to make this deterministic, but I've | |
651 | certainly forgotten something. The trouble is that S-records are | |
652 | only a partial file format, not a protocol. Worse, apparently the | |
653 | m88k bug monitor does not run in real time while receiving | |
654 | S-records. Hence, we must pay excruciating attention to when and | |
655 | where error messages are returned, and what has actually been sent. | |
5905161c | 656 | |
be58e87e RP |
657 | Each call represents a chunk of memory to be sent to the target. |
658 | We break that chunk into an S0 header record, some number of S3 | |
659 | data records each containing srec_bytes, and an S7 termination | |
660 | record. */ | |
661 | ||
16f6ab6b RP |
662 | static char *srecord_strings[] = { |
663 | "S-RECORD", | |
c6f494e8 | 664 | "-Bug>", |
16f6ab6b RP |
665 | NULL, |
666 | }; | |
667 | ||
be58e87e | 668 | static int |
c6f494e8 | 669 | bug_write_memory (memaddr, myaddr, len) |
5905161c RP |
670 | CORE_ADDR memaddr; |
671 | unsigned char *myaddr; | |
672 | int len; | |
673 | { | |
674 | int done; | |
5905161c | 675 | int checksum; |
be58e87e RP |
676 | int x; |
677 | int retries; | |
678 | char buffer[(srec_bytes + 8) << 1]; | |
5905161c | 679 | |
be58e87e | 680 | retries = 0; |
5905161c | 681 | |
be58e87e | 682 | do |
5905161c | 683 | { |
be58e87e RP |
684 | done = 0; |
685 | ||
686 | if (retries > srec_max_retries) | |
687 | return(-1); | |
688 | ||
689 | if (retries > 0) | |
5905161c | 690 | { |
c6f494e8 | 691 | if (sr_get_debug() > 0) |
be58e87e RP |
692 | printf("\n<retrying...>\n"); |
693 | ||
c6f494e8 | 694 | /* This gr_expect_prompt call is extremely important. Without |
be58e87e RP |
695 | it, we will tend to resend our packet so fast that it |
696 | will arrive before the bug monitor is ready to receive | |
697 | it. This would lead to a very ugly resend loop. */ | |
698 | ||
c6f494e8 | 699 | gr_expect_prompt(); |
5905161c | 700 | } |
5905161c | 701 | |
be58e87e RP |
702 | start_load(); |
703 | ||
704 | while (done < len) | |
705 | { | |
706 | int thisgo; | |
707 | int idx; | |
708 | char *buf = buffer; | |
709 | CORE_ADDR address; | |
710 | ||
711 | checksum = 0; | |
712 | thisgo = len - done; | |
713 | if (thisgo > srec_bytes) | |
714 | thisgo = srec_bytes; | |
715 | ||
716 | address = memaddr + done; | |
717 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
718 | buf += 12; | |
719 | ||
720 | checksum += (thisgo + 4 + 1 | |
721 | + (address & 0xff) | |
722 | + ((address >> 8) & 0xff) | |
723 | + ((address >> 16) & 0xff) | |
724 | + ((address >> 24) & 0xff)); | |
725 | ||
726 | for (idx = 0; idx < thisgo; idx++) | |
727 | { | |
728 | sprintf (buf, "%02X", myaddr[idx + done]); | |
729 | checksum += myaddr[idx + done]; | |
730 | buf += 2; | |
731 | } | |
732 | ||
733 | if (srec_noise > 0) | |
734 | { | |
735 | /* FIXME-NOW: insert a deliberate error every now and then. | |
736 | This is intended for testing/debugging the error handling | |
737 | stuff. */ | |
738 | static int counter = 0; | |
739 | if (++counter > srec_noise) | |
740 | { | |
741 | counter = 0; | |
742 | ++checksum; | |
743 | } | |
744 | } | |
745 | ||
746 | sprintf(buf, "%02X", ~checksum & 0xff); | |
747 | bug_srec_write_cr (buffer); | |
748 | ||
749 | if (srec_sleep != 0) | |
750 | sleep(srec_sleep); | |
751 | ||
c6f494e8 | 752 | /* This pollchar is probably redundant to the gr_multi_scan |
be58e87e RP |
753 | below. Trouble is, we can't be sure when or where an |
754 | error message will appear. Apparently, when running at | |
755 | full speed from a typical sun4, error messages tend to | |
756 | appear to arrive only *after* the s7 record. */ | |
757 | ||
c6f494e8 | 758 | if ((x = sr_pollchar()) != 0) |
be58e87e | 759 | { |
c6f494e8 | 760 | if (sr_get_debug() > 0) |
be58e87e RP |
761 | printf("\n<retrying...>\n"); |
762 | ||
763 | ++retries; | |
764 | ||
765 | /* flush any remaining input and verify that we are back | |
766 | at the prompt level. */ | |
c6f494e8 | 767 | gr_expect_prompt(); |
be58e87e RP |
768 | /* start all over again. */ |
769 | start_load(); | |
770 | done = 0; | |
771 | continue; | |
772 | } | |
773 | ||
774 | done += thisgo; | |
775 | } | |
776 | ||
777 | bug_srec_write_cr("S7060000000000F9"); | |
778 | ++retries; | |
779 | ||
780 | /* Having finished the load, we need to figure out whether we | |
781 | had any errors. */ | |
c6f494e8 | 782 | } while (gr_multi_scan(srecord_strings, 0) == 0);; |
be58e87e RP |
783 | |
784 | return(0); | |
5905161c RP |
785 | } |
786 | ||
5905161c RP |
787 | /* Copy LEN bytes of data from debugger memory at MYADDR |
788 | to inferior's memory at MEMADDR. Returns errno value. | |
789 | * sb/sh instructions don't work on unaligned addresses, when TU=1. | |
790 | */ | |
791 | ||
792 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
793 | at debugger address MYADDR. Returns errno value. */ | |
be58e87e | 794 | static int |
c6f494e8 | 795 | bug_read_memory (memaddr, myaddr, len) |
5905161c | 796 | CORE_ADDR memaddr; |
755892d6 | 797 | unsigned char *myaddr; |
5905161c RP |
798 | int len; |
799 | { | |
800 | char request[100]; | |
801 | char *buffer; | |
802 | char *p; | |
803 | char type; | |
804 | char size; | |
805 | unsigned char c; | |
806 | unsigned int inaddr; | |
807 | unsigned int checksum; | |
808 | ||
809 | sprintf(request, "du 0 %x:&%d", memaddr, len); | |
c6f494e8 | 810 | sr_write_cr(request); |
5905161c RP |
811 | |
812 | p = buffer = alloca(len); | |
813 | ||
814 | /* scan up through the header */ | |
c6f494e8 | 815 | sr_expect("S0030000FC"); |
5905161c RP |
816 | |
817 | while (p < buffer + len) | |
818 | { | |
819 | /* scan off any white space. */ | |
c6f494e8 | 820 | while (sr_readchar() != 'S') ;; |
5905161c RP |
821 | |
822 | /* what kind of s-rec? */ | |
c6f494e8 | 823 | type = sr_readchar(); |
5905161c RP |
824 | |
825 | /* scan record size */ | |
c6f494e8 | 826 | sr_get_hex_byte(&size); |
5905161c RP |
827 | checksum = size; |
828 | --size; | |
829 | inaddr = 0; | |
830 | ||
831 | switch (type) | |
832 | { | |
833 | case '7': | |
834 | case '8': | |
835 | case '9': | |
836 | goto done; | |
837 | ||
838 | case '3': | |
c6f494e8 | 839 | sr_get_hex_byte(&c); |
5905161c RP |
840 | inaddr = (inaddr << 8) + c; |
841 | checksum += c; | |
842 | --size; | |
843 | /* intentional fall through */ | |
844 | case '2': | |
c6f494e8 | 845 | sr_get_hex_byte(&c); |
5905161c RP |
846 | inaddr = (inaddr << 8) + c; |
847 | checksum += c; | |
848 | --size; | |
849 | /* intentional fall through */ | |
850 | case '1': | |
c6f494e8 | 851 | sr_get_hex_byte(&c); |
5905161c RP |
852 | inaddr = (inaddr << 8) + c; |
853 | checksum += c; | |
854 | --size; | |
c6f494e8 | 855 | sr_get_hex_byte(&c); |
5905161c RP |
856 | inaddr = (inaddr << 8) + c; |
857 | checksum += c; | |
858 | --size; | |
859 | break; | |
860 | ||
861 | default: | |
862 | /* bonk */ | |
863 | error("reading s-records."); | |
864 | } | |
865 | ||
866 | if (inaddr < memaddr | |
867 | || (memaddr + len) < (inaddr + size)) | |
868 | error("srec out of memory range."); | |
869 | ||
870 | if (p != buffer + inaddr - memaddr) | |
871 | error("srec out of sequence."); | |
872 | ||
873 | for (; size; --size, ++p) | |
874 | { | |
c6f494e8 | 875 | sr_get_hex_byte(p); |
5905161c RP |
876 | checksum += *p; |
877 | } | |
878 | ||
c6f494e8 | 879 | sr_get_hex_byte(&c); |
5905161c RP |
880 | if (c != (~checksum & 0xff)) |
881 | error("bad s-rec checksum"); | |
882 | } | |
883 | ||
884 | done: | |
c6f494e8 | 885 | gr_expect_prompt(); |
5905161c RP |
886 | if (p != buffer + len) |
887 | return(1); | |
888 | ||
889 | memcpy(myaddr, buffer, len); | |
890 | return(0); | |
891 | } | |
892 | ||
5905161c RP |
893 | #define MAX_BREAKS 16 |
894 | static int num_brkpts = 0; | |
895 | static int | |
896 | bug_insert_breakpoint (addr, save) | |
897 | CORE_ADDR addr; | |
898 | char *save; /* Throw away, let bug save instructions */ | |
899 | { | |
c6f494e8 | 900 | sr_check_open (); |
5905161c RP |
901 | |
902 | if (num_brkpts < MAX_BREAKS) | |
903 | { | |
904 | char buffer[100]; | |
905 | ||
906 | num_brkpts++; | |
907 | sprintf (buffer, "br %x", addr); | |
c6f494e8 RP |
908 | sr_write_cr (buffer); |
909 | gr_expect_prompt (); | |
5905161c RP |
910 | return(0); |
911 | } | |
912 | else | |
913 | { | |
914 | fprintf_filtered (stderr, | |
915 | "Too many break points, break point not installed\n"); | |
916 | return(1); | |
917 | } | |
918 | ||
919 | } | |
920 | static int | |
921 | bug_remove_breakpoint (addr, save) | |
922 | CORE_ADDR addr; | |
923 | char *save; /* Throw away, let bug save instructions */ | |
924 | { | |
925 | if (num_brkpts > 0) | |
926 | { | |
927 | char buffer[100]; | |
928 | ||
929 | num_brkpts--; | |
930 | sprintf (buffer, "nobr %x", addr); | |
c6f494e8 RP |
931 | sr_write_cr (buffer); |
932 | gr_expect_prompt (); | |
5905161c RP |
933 | |
934 | } | |
935 | return (0); | |
936 | } | |
937 | ||
938 | /* Clear the bugs notion of what the break points are */ | |
939 | static int | |
940 | bug_clear_breakpoints () | |
941 | { | |
942 | ||
c6f494e8 | 943 | if (sr_is_open()) |
5905161c | 944 | { |
c6f494e8 RP |
945 | sr_write_cr ("nobr"); |
946 | sr_expect("nobr"); | |
947 | gr_expect_prompt (); | |
5905161c RP |
948 | } |
949 | num_brkpts = 0; | |
be58e87e | 950 | return(0); |
5905161c | 951 | } |
be58e87e | 952 | |
ae87844d | 953 | struct target_ops bug_ops = |
5905161c RP |
954 | { |
955 | "bug", "Remote BUG monitor", | |
956 | "Use the mvme187 board running the BUG monitor connected\n\ | |
957 | by a serial line.", | |
958 | ||
c6f494e8 RP |
959 | bug_open, gr_close, |
960 | 0, gr_detach, bug_resume, bug_wait, /* attach */ | |
5905161c | 961 | bug_fetch_register, bug_store_register, |
c6f494e8 RP |
962 | gr_prepare_to_store, |
963 | bug_xfer_memory, | |
964 | gr_files_info, | |
5905161c RP |
965 | bug_insert_breakpoint, bug_remove_breakpoint, /* Breakpoints */ |
966 | 0, 0, 0, 0, 0, /* Terminal handling */ | |
c6f494e8 | 967 | gr_kill, /* FIXME, kill */ |
5905161c RP |
968 | bug_load, |
969 | 0, /* lookup_symbol */ | |
c6f494e8 RP |
970 | gr_create_inferior, /* create_inferior */ |
971 | gr_mourn, /* mourn_inferior FIXME */ | |
5905161c RP |
972 | 0, /* can_run */ |
973 | 0, /* notice_signals */ | |
974 | process_stratum, 0, /* next */ | |
975 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ | |
976 | 0, 0, /* Section pointers */ | |
977 | OPS_MAGIC, /* Always the last thing */ | |
978 | }; | |
979 | ||
980 | void | |
981 | _initialize_remote_bug () | |
982 | { | |
983 | add_target (&bug_ops); | |
984 | ||
be58e87e RP |
985 | add_show_from_set |
986 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
987 | (char *) &srec_bytes, | |
988 | "\ | |
989 | Set the number of bytes represented in each S-record.\n\ | |
990 | This affects the communication protocol with the remote target.", | |
991 | &setlist), | |
992 | &showlist); | |
993 | ||
994 | add_show_from_set | |
995 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
996 | (char *) &srec_max_retries, | |
997 | "\ | |
998 | Set the number of retries for shipping S-records.\n\ | |
999 | This affects the communication protocol with the remote target.", | |
1000 | &setlist), | |
1001 | &showlist); | |
1002 | ||
1003 | add_show_from_set | |
1004 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
1005 | (char *) &srec_frame, | |
1006 | "\ | |
1007 | Set the number of bytes in an S-record frame.\n\ | |
1008 | This affects the communication protocol with the remote target.", | |
1009 | &setlist), | |
1010 | &showlist); | |
1011 | ||
1012 | add_show_from_set | |
1013 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1014 | (char *) &srec_noise, | |
1015 | "\ | |
1016 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1017 | Zero means flub none at all. This affects the communication protocol\n\ | |
1018 | with the remote target.", | |
1019 | &setlist), | |
1020 | &showlist); | |
1021 | ||
1022 | add_show_from_set | |
1023 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1024 | (char *) &srec_sleep, | |
1025 | "\ | |
1026 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1027 | This affects the communication protocol with the remote target.", | |
1028 | &setlist), | |
1029 | &showlist); | |
1030 | ||
1031 | add_show_from_set | |
1032 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1033 | (char *) &srec_echo_pace, | |
1034 | "\ | |
1035 | Set echo-verification.\n\ | |
1036 | When on, use verification by echo when downloading S-records. This is\n\ | |
1037 | much slower, but generally more reliable.", | |
1038 | &setlist), | |
1039 | &showlist); | |
5905161c | 1040 | } |