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 | ||
c6f494e8 | 41 | #include "remote-utils.h" |
755892d6 | 42 | |
be58e87e | 43 | extern int sleep(); |
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 */ | |
755892d6 | 52 | static int bug_clear_breakpoints PARAMS((void)); |
be58e87e | 53 | |
c6f494e8 | 54 | static int bug_read_memory PARAMS((CORE_ADDR memaddr, |
755892d6 RP |
55 | unsigned char *myaddr, |
56 | int len)); | |
be58e87e | 57 | |
c6f494e8 | 58 | static int bug_write_memory PARAMS((CORE_ADDR memaddr, |
755892d6 RP |
59 | unsigned char *myaddr, |
60 | int len)); | |
be58e87e | 61 | |
be58e87e RP |
62 | /* This variable is somewhat arbitrary. It's here so that it can be |
63 | set from within a running gdb. */ | |
64 | ||
65 | static int srec_max_retries = 3; | |
66 | ||
67 | /* Each S-record download to the target consists of an S0 header | |
68 | record, some number of S3 data records, and one S7 termination | |
69 | record. I call this download a "frame". Srec_frame says how many | |
70 | bytes will be represented in each frame. */ | |
71 | ||
72 | static int srec_frame = 160; | |
73 | ||
74 | /* This variable determines how many bytes will be represented in each | |
75 | S3 s-record. */ | |
76 | ||
77 | static int srec_bytes = 40; | |
78 | ||
79 | /* At one point it appeared to me as though the bug monitor could not | |
80 | really be expected to receive two sequential characters at 9600 | |
81 | baud reliably. Echo-pacing is an attempt to force data across the | |
82 | line even in this condition. Specifically, in echo-pace mode, each | |
83 | character is sent one at a time and we look for the echo before | |
84 | sending the next. This is excruciatingly slow. */ | |
5905161c | 85 | |
be58e87e RP |
86 | static int srec_echo_pace = 0; |
87 | ||
88 | /* How long to wait after an srec for a possible error message. | |
89 | Similar to the above, I tried sleeping after sending each S3 record | |
90 | in hopes that I might actually see error messages from the bug | |
91 | monitor. This might actually work if we were to use sleep | |
92 | intervals smaller than 1 second. */ | |
93 | ||
94 | static int srec_sleep = 0; | |
95 | ||
96 | /* Every srec_noise records, flub the checksum. This is a debugging | |
97 | feature. Set the variable to something other than 1 in order to | |
98 | inject *deliberate* checksum errors. One might do this if one | |
99 | wanted to test error handling and recovery. */ | |
100 | ||
101 | static int srec_noise = 0; | |
5905161c | 102 | |
5905161c RP |
103 | /* Called when SIGALRM signal sent due to alarm() timeout. */ |
104 | ||
105 | /* Number of SIGTRAPs we need to simulate. That is, the next | |
106 | NEED_ARTIFICIAL_TRAP calls to bug_wait should just return | |
107 | SIGTRAP without actually waiting for anything. */ | |
108 | ||
109 | static int need_artificial_trap = 0; | |
110 | ||
5905161c RP |
111 | /* |
112 | * Download a file specified in 'args', to the bug. | |
113 | */ | |
be58e87e | 114 | |
5905161c RP |
115 | static void |
116 | bug_load (args, fromtty) | |
117 | char *args; | |
118 | int fromtty; | |
119 | { | |
120 | bfd *abfd; | |
121 | asection *s; | |
5905161c RP |
122 | char buffer[1024]; |
123 | ||
c6f494e8 | 124 | sr_check_open (); |
5905161c | 125 | |
c6f494e8 | 126 | dcache_flush (gr_get_dcache()); |
5905161c RP |
127 | inferior_pid = 0; |
128 | abfd = bfd_openr (args, 0); | |
129 | if (!abfd) | |
130 | { | |
131 | printf_filtered ("Unable to open file %s\n", args); | |
132 | return; | |
133 | } | |
134 | ||
135 | if (bfd_check_format (abfd, bfd_object) == 0) | |
136 | { | |
137 | printf_filtered ("File is not an object file\n"); | |
138 | return; | |
139 | } | |
140 | ||
141 | s = abfd->sections; | |
142 | while (s != (asection *) NULL) | |
143 | { | |
144 | if (s->flags & SEC_LOAD) | |
145 | { | |
146 | int i; | |
147 | ||
be58e87e | 148 | char *buffer = xmalloc (srec_frame); |
5905161c RP |
149 | |
150 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size); | |
be58e87e RP |
151 | fflush (stdout); |
152 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
5905161c | 153 | { |
be58e87e RP |
154 | if (srec_frame > s->_raw_size - i) |
155 | srec_frame = s->_raw_size - i; | |
5905161c | 156 | |
be58e87e | 157 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); |
c6f494e8 | 158 | bug_write_memory (s->vma + i, buffer, srec_frame); |
5905161c RP |
159 | printf_filtered ("*"); |
160 | fflush (stdout); | |
161 | } | |
162 | printf_filtered ("\n"); | |
163 | free (buffer); | |
164 | } | |
165 | s = s->next; | |
166 | } | |
be58e87e | 167 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); |
c6f494e8 RP |
168 | sr_write_cr (buffer); |
169 | gr_expect_prompt (); | |
5905161c RP |
170 | } |
171 | ||
c6f494e8 | 172 | #if 0 |
5905161c RP |
173 | static char * |
174 | get_word (p) | |
175 | char **p; | |
176 | { | |
177 | char *s = *p; | |
178 | char *word; | |
179 | char *copy; | |
180 | size_t len; | |
181 | ||
182 | while (isspace (*s)) | |
183 | s++; | |
184 | ||
185 | word = s; | |
186 | ||
187 | len = 0; | |
188 | ||
189 | while (*s && !isspace (*s)) | |
190 | { | |
191 | s++; | |
192 | len++; | |
193 | ||
194 | } | |
195 | copy = xmalloc (len + 1); | |
196 | memcpy (copy, word, len); | |
197 | copy[len] = 0; | |
198 | *p = s; | |
199 | return copy; | |
200 | } | |
c6f494e8 | 201 | #endif |
5905161c | 202 | |
c6f494e8 RP |
203 | static struct gr_settings bug_settings = { |
204 | NULL, /* dcache */ | |
205 | "Bug>", /* prompt */ | |
206 | &bug_ops, /* ops */ | |
207 | bug_clear_breakpoints, /* clear_all_breakpoints */ | |
208 | bug_read_memory, /* readfunc */ | |
209 | bug_write_memory, /* writefunc */ | |
210 | gr_generic_checkin, /* checkin */ | |
211 | }; | |
5905161c | 212 | |
c6f494e8 RP |
213 | static char *cpu_check_strings[] = { |
214 | "=", | |
215 | "Invalid Register", | |
216 | }; | |
5905161c RP |
217 | |
218 | static void | |
c6f494e8 | 219 | bug_open (args, from_tty) |
5905161c RP |
220 | char *args; |
221 | int from_tty; | |
222 | { | |
c6f494e8 RP |
223 | if (args == NULL) |
224 | args = ""; | |
5905161c | 225 | |
c6f494e8 RP |
226 | gr_open(args, from_tty, &bug_settings); |
227 | /* decide *now* whether we are on an 88100 or an 88110 */ | |
228 | sr_write_cr("rs cr06"); | |
229 | sr_expect("rs cr06"); | |
5905161c | 230 | |
c6f494e8 RP |
231 | switch (sr_multi_scan(cpu_check_strings, 0)) |
232 | { | |
233 | case 0: /* this is an m88100 */ | |
234 | target_is_m88110 = 0; | |
235 | break; | |
236 | case 1: /* this is an m88110 */ | |
237 | target_is_m88110 = 1; | |
238 | break; | |
239 | default: | |
240 | abort(); | |
241 | } | |
5905161c RP |
242 | } |
243 | ||
244 | /* Tell the remote machine to resume. */ | |
245 | ||
246 | void | |
be58e87e RP |
247 | bug_resume (pid, step, sig) |
248 | int pid, step, sig; | |
5905161c | 249 | { |
c6f494e8 | 250 | dcache_flush (gr_get_dcache()); |
5905161c RP |
251 | |
252 | if (step) | |
253 | { | |
c6f494e8 | 254 | sr_write_cr("t"); |
5905161c RP |
255 | |
256 | /* Force the next bug_wait to return a trap. Not doing anything | |
257 | about I/O from the target means that the user has to type | |
258 | "continue" to see any. FIXME, this should be fixed. */ | |
259 | need_artificial_trap = 1; | |
260 | } | |
261 | else | |
c6f494e8 | 262 | sr_write_cr ("g"); |
5905161c RP |
263 | |
264 | return; | |
265 | } | |
266 | ||
be58e87e RP |
267 | /* Wait until the remote machine stops, then return, |
268 | storing status in STATUS just as `wait' would. */ | |
269 | ||
16f6ab6b RP |
270 | static char *wait_strings[] = { |
271 | "At Breakpoint", | |
272 | "Exception: Data Access Fault (Local Bus Timeout)", | |
273 | "\r8???-Bug>", | |
c6f494e8 | 274 | "\r197-Bug>", |
16f6ab6b RP |
275 | NULL, |
276 | }; | |
277 | ||
be58e87e RP |
278 | int |
279 | bug_wait (status) | |
280 | WAITTYPE *status; | |
281 | { | |
c6f494e8 | 282 | int old_timeout = sr_get_timeout(); |
be58e87e RP |
283 | int old_immediate_quit = immediate_quit; |
284 | ||
285 | WSETEXIT ((*status), 0); | |
286 | ||
16f6ab6b RP |
287 | /* read off leftovers from resume so that the rest can be passed |
288 | back out as stdout. */ | |
289 | if (need_artificial_trap == 0) | |
5905161c | 290 | { |
c6f494e8 RP |
291 | sr_expect("Effective address: "); |
292 | (void) sr_get_hex_word(); | |
293 | sr_expect ("\r\n"); | |
5905161c | 294 | } |
be58e87e | 295 | |
c6f494e8 | 296 | sr_set_timeout(-1); /* Don't time out -- user program is running. */ |
be58e87e RP |
297 | immediate_quit = 1; /* Helps ability to QUIT */ |
298 | ||
c6f494e8 | 299 | switch (gr_multi_scan(wait_strings, need_artificial_trap == 0)) |
5905161c | 300 | { |
16f6ab6b | 301 | case 0: /* breakpoint case */ |
be58e87e | 302 | WSETSTOP ((*status), SIGTRAP); |
16f6ab6b | 303 | /* user output from the target can be discarded here. (?) */ |
c6f494e8 | 304 | gr_expect_prompt(); |
16f6ab6b RP |
305 | break; |
306 | ||
307 | case 1: /* bus error */ | |
308 | WSETSTOP ((*status), SIGBUS); | |
309 | /* user output from the target can be discarded here. (?) */ | |
c6f494e8 | 310 | gr_expect_prompt(); |
16f6ab6b RP |
311 | break; |
312 | ||
313 | case 2: /* normal case */ | |
c6f494e8 | 314 | case 3: |
16f6ab6b RP |
315 | if (need_artificial_trap != 0) |
316 | { | |
317 | /* stepping */ | |
318 | WSETSTOP ((*status), SIGTRAP); | |
319 | need_artificial_trap--; | |
320 | break; | |
321 | } | |
322 | else | |
323 | { | |
324 | /* exit case */ | |
325 | WSETEXIT ((*status), 0); | |
326 | break; | |
327 | } | |
be58e87e | 328 | |
16f6ab6b RP |
329 | case -1: /* trouble */ |
330 | default: | |
331 | fprintf_filtered (stderr, | |
332 | "Trouble reading target during wait\n"); | |
333 | break; | |
334 | } | |
5905161c | 335 | |
c6f494e8 | 336 | sr_set_timeout(old_timeout); |
5905161c RP |
337 | immediate_quit = old_immediate_quit; |
338 | return 0; | |
339 | } | |
340 | ||
341 | /* Return the name of register number REGNO | |
342 | in the form input and output by bug. | |
343 | ||
344 | Returns a pointer to a static buffer containing the answer. */ | |
345 | static char * | |
346 | get_reg_name (regno) | |
347 | int regno; | |
348 | { | |
349 | static char *rn[] = { | |
350 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", | |
351 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
352 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
353 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
354 | ||
355 | /* these get confusing because we omit a few and switch some ordering around. */ | |
356 | ||
357 | "cr01", /* 32 = psr */ | |
358 | "fcr62", /* 33 = fpsr*/ | |
359 | "fcr63", /* 34 = fpcr */ | |
be58e87e RP |
360 | "ip", /* this is something of a cheat. */ |
361 | /* 35 = sxip */ | |
5905161c RP |
362 | "cr05", /* 36 = snip */ |
363 | "cr06", /* 37 = sfip */ | |
c6f494e8 RP |
364 | |
365 | "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07", | |
366 | "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15", | |
367 | "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", | |
368 | "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", | |
5905161c RP |
369 | }; |
370 | ||
371 | return rn[regno]; | |
372 | } | |
373 | ||
16f6ab6b | 374 | #if 0 /* not currently used */ |
be58e87e RP |
375 | /* Read from remote while the input matches STRING. Return zero on |
376 | success, -1 on failure. */ | |
377 | ||
378 | static int | |
379 | bug_scan (s) | |
380 | char *s; | |
381 | { | |
382 | int c; | |
383 | ||
384 | while (*s) | |
385 | { | |
c6f494e8 | 386 | c = sr_readchar(); |
be58e87e RP |
387 | if (c != *s++) |
388 | { | |
389 | fflush(stdout); | |
390 | printf("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
391 | return(-1); | |
392 | } | |
393 | } | |
394 | ||
395 | return(0); | |
396 | } | |
16f6ab6b | 397 | #endif /* never */ |
be58e87e RP |
398 | |
399 | static int | |
400 | bug_srec_write_cr (s) | |
401 | char *s; | |
402 | { | |
403 | char *p = s; | |
404 | ||
405 | if (srec_echo_pace) | |
406 | for (p = s; *p; ++p) | |
407 | { | |
c6f494e8 | 408 | if (sr_get_debug() > 0) |
be58e87e RP |
409 | printf ("%c", *p); |
410 | ||
411 | do | |
c6f494e8 RP |
412 | SERIAL_WRITE(sr_get_desc(), p, 1); |
413 | while (sr_pollchar() != *p); | |
be58e87e RP |
414 | } |
415 | else | |
416 | { | |
c6f494e8 | 417 | sr_write_cr (s); |
be58e87e RP |
418 | /* return(bug_scan (s) || bug_scan ("\n")); */ |
419 | } | |
420 | ||
421 | return(0); | |
5905161c RP |
422 | } |
423 | ||
424 | /* Store register REGNO, or all if REGNO == -1. */ | |
425 | ||
426 | static void | |
427 | bug_fetch_register(regno) | |
428 | int regno; | |
429 | { | |
430 | REGISTER_TYPE regval; | |
c6f494e8 RP |
431 | |
432 | sr_check_open(); | |
5905161c RP |
433 | |
434 | if (regno == -1) | |
435 | { | |
436 | int i; | |
437 | ||
438 | for (i = 0; i < NUM_REGS; ++i) | |
439 | bug_fetch_register(i); | |
440 | } | |
c6f494e8 | 441 | else if (regno < XFP_REGNUM) |
5905161c | 442 | { |
c6f494e8 RP |
443 | sr_write("rs ", 3); |
444 | sr_write_cr(get_reg_name(regno)); | |
445 | sr_expect("="); | |
446 | regval = sr_get_hex_word(); | |
447 | gr_expect_prompt(); | |
5905161c RP |
448 | |
449 | /* the following registers contain flag bits in the lower to bit slots. | |
450 | Mask them off */ | |
451 | if (regno == PC_REGNUM /* aka sxip */ | |
452 | || regno == NPC_REGNUM /* aka snip */ | |
453 | || regno == SFIP_REGNUM) /* aka sfip */ | |
454 | regval &= ~0x3; | |
455 | ||
456 | supply_register(regno, (char *) ®val); | |
457 | } | |
c6f494e8 RP |
458 | else |
459 | { | |
460 | /* Float register so we need to parse a strange data format. */ | |
461 | long p; | |
462 | unsigned char value[10]; | |
463 | ||
464 | sr_write("rs ", 3); | |
465 | sr_write(get_reg_name(regno), strlen(get_reg_name(regno))); | |
466 | sr_write_cr(";d"); | |
467 | sr_expect("rs"); | |
468 | sr_expect(get_reg_name(regno)); | |
469 | sr_expect(";d"); | |
470 | sr_expect("="); | |
471 | ||
472 | /* sign */ | |
473 | p = sr_get_hex_digit(1); | |
474 | value[0] = p << 7; | |
475 | ||
476 | /* exponent */ | |
477 | sr_expect("_"); | |
478 | p = sr_get_hex_digit(1); | |
479 | value[0] += (p << 4); | |
480 | value[0] += sr_get_hex_digit(1); | |
481 | ||
482 | value[1] = sr_get_hex_digit(1) << 4; | |
483 | ||
484 | /* fraction */ | |
485 | sr_expect("_"); | |
486 | value[1] += sr_get_hex_digit(1); | |
487 | ||
488 | value[2] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
489 | value[3] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
490 | value[4] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
491 | value[5] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
492 | value[6] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
493 | value[7] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
494 | value[8] = 0; | |
495 | value[9] = 0; | |
496 | ||
497 | gr_expect_prompt(); | |
498 | supply_register(regno, value); | |
499 | } | |
5905161c RP |
500 | |
501 | return; | |
502 | } | |
503 | ||
504 | /* Store register REGNO, or all if REGNO == -1. */ | |
505 | ||
506 | static void | |
507 | bug_store_register (regno) | |
508 | int regno; | |
509 | { | |
5905161c | 510 | char buffer[1024]; |
c6f494e8 | 511 | sr_check_open(); |
5905161c RP |
512 | |
513 | if (regno == -1) | |
514 | { | |
515 | int i; | |
516 | ||
517 | for (i = 0; i < NUM_REGS; ++i) | |
518 | bug_store_register(i); | |
519 | } | |
520 | else | |
521 | { | |
522 | char *regname; | |
523 | ||
c6f494e8 | 524 | regname = get_reg_name(regno); |
5905161c | 525 | |
c6f494e8 RP |
526 | if (regno < XFP_REGNUM) |
527 | sprintf(buffer, "rs %s %08x", | |
528 | regname, | |
529 | read_register(regno)); | |
530 | else | |
531 | { | |
532 | unsigned char *value = ®isters[REGISTER_BYTE(regno)]; | |
533 | ||
534 | sprintf(buffer, "rs %s %1x_%2x%1x_%1x%2x%2x%2x%2x%2x%2x", | |
535 | regname, | |
536 | /* sign */ | |
537 | (value[0] >> 7) & 0xf, | |
538 | /* exponent */ | |
539 | value[0] & 0x7f, | |
540 | (value[1] >> 8) & 0xf, | |
541 | /* fraction */ | |
542 | value[1] & 0xf, | |
543 | value[2], | |
544 | value[3], | |
545 | value[4], | |
546 | value[5], | |
547 | value[6], | |
548 | value[7]); | |
549 | } | |
5905161c | 550 | |
c6f494e8 RP |
551 | sr_write_cr(buffer); |
552 | gr_expect_prompt(); | |
5905161c RP |
553 | } |
554 | ||
555 | return; | |
556 | } | |
557 | ||
5905161c | 558 | int |
c6f494e8 | 559 | bug_xfer_memory (memaddr, myaddr, len, write, target) |
5905161c RP |
560 | CORE_ADDR memaddr; |
561 | char *myaddr; | |
562 | int len; | |
563 | int write; | |
564 | struct target_ops *target; /* ignored */ | |
565 | { | |
566 | register int i; | |
567 | ||
568 | /* Round starting address down to longword boundary. */ | |
569 | register CORE_ADDR addr; | |
570 | ||
571 | /* Round ending address up; get number of longwords that makes. */ | |
572 | register int count; | |
573 | ||
574 | /* Allocate buffer of that many longwords. */ | |
575 | register int *buffer; | |
576 | ||
577 | addr = memaddr & -sizeof (int); | |
578 | count = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
579 | ||
580 | buffer = (int *) alloca (count * sizeof (int)); | |
581 | ||
582 | if (write) | |
583 | { | |
584 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
585 | ||
586 | if (addr != memaddr || len < (int) sizeof (int)) | |
587 | { | |
588 | /* Need part of initial word -- fetch it. */ | |
c6f494e8 | 589 | buffer[0] = gr_fetch_word (addr); |
5905161c RP |
590 | } |
591 | ||
592 | if (count > 1) /* FIXME, avoid if even boundary */ | |
593 | { | |
594 | buffer[count - 1] | |
c6f494e8 | 595 | = gr_fetch_word (addr + (count - 1) * sizeof (int)); |
5905161c RP |
596 | } |
597 | ||
598 | /* Copy data to be written over corresponding part of buffer */ | |
599 | ||
ade40d31 | 600 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); |
5905161c RP |
601 | |
602 | /* Write the entire buffer. */ | |
603 | ||
604 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
605 | { | |
606 | errno = 0; | |
c6f494e8 | 607 | gr_store_word (addr, buffer[i]); |
5905161c RP |
608 | if (errno) |
609 | { | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
614 | } | |
615 | } | |
616 | else | |
617 | { | |
618 | /* Read all the longwords */ | |
619 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
620 | { | |
621 | errno = 0; | |
c6f494e8 | 622 | buffer[i] = gr_fetch_word (addr); |
5905161c RP |
623 | if (errno) |
624 | { | |
625 | return 0; | |
626 | } | |
627 | QUIT; | |
628 | } | |
629 | ||
630 | /* Copy appropriate bytes out of the buffer. */ | |
ade40d31 | 631 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); |
5905161c RP |
632 | } |
633 | ||
634 | return len; | |
635 | } | |
636 | ||
be58e87e RP |
637 | static void |
638 | start_load() | |
639 | { | |
640 | char *command; | |
641 | ||
642 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
643 | ||
c6f494e8 RP |
644 | sr_write_cr (command); |
645 | sr_expect (command); | |
646 | sr_expect ("\r\n"); | |
be58e87e RP |
647 | bug_srec_write_cr ("S0030000FC"); |
648 | return; | |
649 | } | |
650 | ||
651 | /* This is an extremely vulnerable and fragile function. I've made | |
652 | considerable attempts to make this deterministic, but I've | |
653 | certainly forgotten something. The trouble is that S-records are | |
654 | only a partial file format, not a protocol. Worse, apparently the | |
655 | m88k bug monitor does not run in real time while receiving | |
656 | S-records. Hence, we must pay excruciating attention to when and | |
657 | where error messages are returned, and what has actually been sent. | |
5905161c | 658 | |
be58e87e RP |
659 | Each call represents a chunk of memory to be sent to the target. |
660 | We break that chunk into an S0 header record, some number of S3 | |
661 | data records each containing srec_bytes, and an S7 termination | |
662 | record. */ | |
663 | ||
16f6ab6b RP |
664 | static char *srecord_strings[] = { |
665 | "S-RECORD", | |
c6f494e8 | 666 | "-Bug>", |
16f6ab6b RP |
667 | NULL, |
668 | }; | |
669 | ||
be58e87e | 670 | static int |
c6f494e8 | 671 | bug_write_memory (memaddr, myaddr, len) |
5905161c RP |
672 | CORE_ADDR memaddr; |
673 | unsigned char *myaddr; | |
674 | int len; | |
675 | { | |
676 | int done; | |
5905161c | 677 | int checksum; |
be58e87e RP |
678 | int x; |
679 | int retries; | |
680 | char buffer[(srec_bytes + 8) << 1]; | |
5905161c | 681 | |
be58e87e | 682 | retries = 0; |
5905161c | 683 | |
be58e87e | 684 | do |
5905161c | 685 | { |
be58e87e RP |
686 | done = 0; |
687 | ||
688 | if (retries > srec_max_retries) | |
689 | return(-1); | |
690 | ||
691 | if (retries > 0) | |
5905161c | 692 | { |
c6f494e8 | 693 | if (sr_get_debug() > 0) |
be58e87e RP |
694 | printf("\n<retrying...>\n"); |
695 | ||
c6f494e8 | 696 | /* This gr_expect_prompt call is extremely important. Without |
be58e87e RP |
697 | it, we will tend to resend our packet so fast that it |
698 | will arrive before the bug monitor is ready to receive | |
699 | it. This would lead to a very ugly resend loop. */ | |
700 | ||
c6f494e8 | 701 | gr_expect_prompt(); |
5905161c | 702 | } |
5905161c | 703 | |
be58e87e RP |
704 | start_load(); |
705 | ||
706 | while (done < len) | |
707 | { | |
708 | int thisgo; | |
709 | int idx; | |
710 | char *buf = buffer; | |
711 | CORE_ADDR address; | |
712 | ||
713 | checksum = 0; | |
714 | thisgo = len - done; | |
715 | if (thisgo > srec_bytes) | |
716 | thisgo = srec_bytes; | |
717 | ||
718 | address = memaddr + done; | |
719 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
720 | buf += 12; | |
721 | ||
722 | checksum += (thisgo + 4 + 1 | |
723 | + (address & 0xff) | |
724 | + ((address >> 8) & 0xff) | |
725 | + ((address >> 16) & 0xff) | |
726 | + ((address >> 24) & 0xff)); | |
727 | ||
728 | for (idx = 0; idx < thisgo; idx++) | |
729 | { | |
730 | sprintf (buf, "%02X", myaddr[idx + done]); | |
731 | checksum += myaddr[idx + done]; | |
732 | buf += 2; | |
733 | } | |
734 | ||
735 | if (srec_noise > 0) | |
736 | { | |
737 | /* FIXME-NOW: insert a deliberate error every now and then. | |
738 | This is intended for testing/debugging the error handling | |
739 | stuff. */ | |
740 | static int counter = 0; | |
741 | if (++counter > srec_noise) | |
742 | { | |
743 | counter = 0; | |
744 | ++checksum; | |
745 | } | |
746 | } | |
747 | ||
748 | sprintf(buf, "%02X", ~checksum & 0xff); | |
749 | bug_srec_write_cr (buffer); | |
750 | ||
751 | if (srec_sleep != 0) | |
752 | sleep(srec_sleep); | |
753 | ||
c6f494e8 | 754 | /* This pollchar is probably redundant to the gr_multi_scan |
be58e87e RP |
755 | below. Trouble is, we can't be sure when or where an |
756 | error message will appear. Apparently, when running at | |
757 | full speed from a typical sun4, error messages tend to | |
758 | appear to arrive only *after* the s7 record. */ | |
759 | ||
c6f494e8 | 760 | if ((x = sr_pollchar()) != 0) |
be58e87e | 761 | { |
c6f494e8 | 762 | if (sr_get_debug() > 0) |
be58e87e RP |
763 | printf("\n<retrying...>\n"); |
764 | ||
765 | ++retries; | |
766 | ||
767 | /* flush any remaining input and verify that we are back | |
768 | at the prompt level. */ | |
c6f494e8 | 769 | gr_expect_prompt(); |
be58e87e RP |
770 | /* start all over again. */ |
771 | start_load(); | |
772 | done = 0; | |
773 | continue; | |
774 | } | |
775 | ||
776 | done += thisgo; | |
777 | } | |
778 | ||
779 | bug_srec_write_cr("S7060000000000F9"); | |
780 | ++retries; | |
781 | ||
782 | /* Having finished the load, we need to figure out whether we | |
783 | had any errors. */ | |
c6f494e8 | 784 | } while (gr_multi_scan(srecord_strings, 0) == 0);; |
be58e87e RP |
785 | |
786 | return(0); | |
5905161c RP |
787 | } |
788 | ||
5905161c RP |
789 | /* Copy LEN bytes of data from debugger memory at MYADDR |
790 | to inferior's memory at MEMADDR. Returns errno value. | |
791 | * sb/sh instructions don't work on unaligned addresses, when TU=1. | |
792 | */ | |
793 | ||
794 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
795 | at debugger address MYADDR. Returns errno value. */ | |
be58e87e | 796 | static int |
c6f494e8 | 797 | bug_read_memory (memaddr, myaddr, len) |
5905161c | 798 | CORE_ADDR memaddr; |
755892d6 | 799 | unsigned char *myaddr; |
5905161c RP |
800 | int len; |
801 | { | |
802 | char request[100]; | |
803 | char *buffer; | |
804 | char *p; | |
805 | char type; | |
806 | char size; | |
807 | unsigned char c; | |
808 | unsigned int inaddr; | |
809 | unsigned int checksum; | |
810 | ||
811 | sprintf(request, "du 0 %x:&%d", memaddr, len); | |
c6f494e8 | 812 | sr_write_cr(request); |
5905161c RP |
813 | |
814 | p = buffer = alloca(len); | |
815 | ||
816 | /* scan up through the header */ | |
c6f494e8 | 817 | sr_expect("S0030000FC"); |
5905161c RP |
818 | |
819 | while (p < buffer + len) | |
820 | { | |
821 | /* scan off any white space. */ | |
c6f494e8 | 822 | while (sr_readchar() != 'S') ;; |
5905161c RP |
823 | |
824 | /* what kind of s-rec? */ | |
c6f494e8 | 825 | type = sr_readchar(); |
5905161c RP |
826 | |
827 | /* scan record size */ | |
c6f494e8 | 828 | sr_get_hex_byte(&size); |
5905161c RP |
829 | checksum = size; |
830 | --size; | |
831 | inaddr = 0; | |
832 | ||
833 | switch (type) | |
834 | { | |
835 | case '7': | |
836 | case '8': | |
837 | case '9': | |
838 | goto done; | |
839 | ||
840 | case '3': | |
c6f494e8 | 841 | sr_get_hex_byte(&c); |
5905161c RP |
842 | inaddr = (inaddr << 8) + c; |
843 | checksum += c; | |
844 | --size; | |
845 | /* intentional fall through */ | |
846 | case '2': | |
c6f494e8 | 847 | sr_get_hex_byte(&c); |
5905161c RP |
848 | inaddr = (inaddr << 8) + c; |
849 | checksum += c; | |
850 | --size; | |
851 | /* intentional fall through */ | |
852 | case '1': | |
c6f494e8 | 853 | sr_get_hex_byte(&c); |
5905161c RP |
854 | inaddr = (inaddr << 8) + c; |
855 | checksum += c; | |
856 | --size; | |
c6f494e8 | 857 | sr_get_hex_byte(&c); |
5905161c RP |
858 | inaddr = (inaddr << 8) + c; |
859 | checksum += c; | |
860 | --size; | |
861 | break; | |
862 | ||
863 | default: | |
864 | /* bonk */ | |
865 | error("reading s-records."); | |
866 | } | |
867 | ||
868 | if (inaddr < memaddr | |
869 | || (memaddr + len) < (inaddr + size)) | |
870 | error("srec out of memory range."); | |
871 | ||
872 | if (p != buffer + inaddr - memaddr) | |
873 | error("srec out of sequence."); | |
874 | ||
875 | for (; size; --size, ++p) | |
876 | { | |
c6f494e8 | 877 | sr_get_hex_byte(p); |
5905161c RP |
878 | checksum += *p; |
879 | } | |
880 | ||
c6f494e8 | 881 | sr_get_hex_byte(&c); |
5905161c RP |
882 | if (c != (~checksum & 0xff)) |
883 | error("bad s-rec checksum"); | |
884 | } | |
885 | ||
886 | done: | |
c6f494e8 | 887 | gr_expect_prompt(); |
5905161c RP |
888 | if (p != buffer + len) |
889 | return(1); | |
890 | ||
891 | memcpy(myaddr, buffer, len); | |
892 | return(0); | |
893 | } | |
894 | ||
5905161c RP |
895 | #define MAX_BREAKS 16 |
896 | static int num_brkpts = 0; | |
897 | static int | |
898 | bug_insert_breakpoint (addr, save) | |
899 | CORE_ADDR addr; | |
900 | char *save; /* Throw away, let bug save instructions */ | |
901 | { | |
c6f494e8 | 902 | sr_check_open (); |
5905161c RP |
903 | |
904 | if (num_brkpts < MAX_BREAKS) | |
905 | { | |
906 | char buffer[100]; | |
907 | ||
908 | num_brkpts++; | |
909 | sprintf (buffer, "br %x", addr); | |
c6f494e8 RP |
910 | sr_write_cr (buffer); |
911 | gr_expect_prompt (); | |
5905161c RP |
912 | return(0); |
913 | } | |
914 | else | |
915 | { | |
916 | fprintf_filtered (stderr, | |
917 | "Too many break points, break point not installed\n"); | |
918 | return(1); | |
919 | } | |
920 | ||
921 | } | |
922 | static int | |
923 | bug_remove_breakpoint (addr, save) | |
924 | CORE_ADDR addr; | |
925 | char *save; /* Throw away, let bug save instructions */ | |
926 | { | |
927 | if (num_brkpts > 0) | |
928 | { | |
929 | char buffer[100]; | |
930 | ||
931 | num_brkpts--; | |
932 | sprintf (buffer, "nobr %x", addr); | |
c6f494e8 RP |
933 | sr_write_cr (buffer); |
934 | gr_expect_prompt (); | |
5905161c RP |
935 | |
936 | } | |
937 | return (0); | |
938 | } | |
939 | ||
940 | /* Clear the bugs notion of what the break points are */ | |
941 | static int | |
942 | bug_clear_breakpoints () | |
943 | { | |
944 | ||
c6f494e8 | 945 | if (sr_is_open()) |
5905161c | 946 | { |
c6f494e8 RP |
947 | sr_write_cr ("nobr"); |
948 | sr_expect("nobr"); | |
949 | gr_expect_prompt (); | |
5905161c RP |
950 | } |
951 | num_brkpts = 0; | |
be58e87e | 952 | return(0); |
5905161c | 953 | } |
be58e87e | 954 | |
ae87844d | 955 | struct target_ops bug_ops = |
5905161c RP |
956 | { |
957 | "bug", "Remote BUG monitor", | |
958 | "Use the mvme187 board running the BUG monitor connected\n\ | |
959 | by a serial line.", | |
960 | ||
c6f494e8 RP |
961 | bug_open, gr_close, |
962 | 0, gr_detach, bug_resume, bug_wait, /* attach */ | |
5905161c | 963 | bug_fetch_register, bug_store_register, |
c6f494e8 RP |
964 | gr_prepare_to_store, |
965 | bug_xfer_memory, | |
966 | gr_files_info, | |
5905161c RP |
967 | bug_insert_breakpoint, bug_remove_breakpoint, /* Breakpoints */ |
968 | 0, 0, 0, 0, 0, /* Terminal handling */ | |
c6f494e8 | 969 | gr_kill, /* FIXME, kill */ |
5905161c RP |
970 | bug_load, |
971 | 0, /* lookup_symbol */ | |
c6f494e8 RP |
972 | gr_create_inferior, /* create_inferior */ |
973 | gr_mourn, /* mourn_inferior FIXME */ | |
5905161c RP |
974 | 0, /* can_run */ |
975 | 0, /* notice_signals */ | |
976 | process_stratum, 0, /* next */ | |
977 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ | |
978 | 0, 0, /* Section pointers */ | |
979 | OPS_MAGIC, /* Always the last thing */ | |
980 | }; | |
981 | ||
982 | void | |
983 | _initialize_remote_bug () | |
984 | { | |
985 | add_target (&bug_ops); | |
986 | ||
be58e87e RP |
987 | add_show_from_set |
988 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
989 | (char *) &srec_bytes, | |
990 | "\ | |
991 | Set the number of bytes represented in each S-record.\n\ | |
992 | This affects the communication protocol with the remote target.", | |
993 | &setlist), | |
994 | &showlist); | |
995 | ||
996 | add_show_from_set | |
997 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
998 | (char *) &srec_max_retries, | |
999 | "\ | |
1000 | Set the number of retries for shipping S-records.\n\ | |
1001 | This affects the communication protocol with the remote target.", | |
1002 | &setlist), | |
1003 | &showlist); | |
1004 | ||
1005 | add_show_from_set | |
1006 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
1007 | (char *) &srec_frame, | |
1008 | "\ | |
1009 | Set the number of bytes in an S-record frame.\n\ | |
1010 | This affects the communication protocol with the remote target.", | |
1011 | &setlist), | |
1012 | &showlist); | |
1013 | ||
1014 | add_show_from_set | |
1015 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1016 | (char *) &srec_noise, | |
1017 | "\ | |
1018 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1019 | Zero means flub none at all. This affects the communication protocol\n\ | |
1020 | with the remote target.", | |
1021 | &setlist), | |
1022 | &showlist); | |
1023 | ||
1024 | add_show_from_set | |
1025 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1026 | (char *) &srec_sleep, | |
1027 | "\ | |
1028 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1029 | This affects the communication protocol with the remote target.", | |
1030 | &setlist), | |
1031 | &showlist); | |
1032 | ||
1033 | add_show_from_set | |
1034 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1035 | (char *) &srec_echo_pace, | |
1036 | "\ | |
1037 | Set echo-verification.\n\ | |
1038 | When on, use verification by echo when downloading S-records. This is\n\ | |
1039 | much slower, but generally more reliable.", | |
1040 | &setlist), | |
1041 | &showlist); | |
5905161c | 1042 | } |