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 | 244 | bug_resume (pid, step, sig) |
67ac9759 JK |
245 | int pid, step; |
246 | enum target_signal sig; | |
5905161c | 247 | { |
c6f494e8 | 248 | dcache_flush (gr_get_dcache()); |
5905161c RP |
249 | |
250 | if (step) | |
251 | { | |
c6f494e8 | 252 | sr_write_cr("t"); |
5905161c RP |
253 | |
254 | /* Force the next bug_wait to return a trap. Not doing anything | |
255 | about I/O from the target means that the user has to type | |
256 | "continue" to see any. FIXME, this should be fixed. */ | |
257 | need_artificial_trap = 1; | |
258 | } | |
259 | else | |
c6f494e8 | 260 | sr_write_cr ("g"); |
5905161c RP |
261 | |
262 | return; | |
263 | } | |
264 | ||
be58e87e RP |
265 | /* Wait until the remote machine stops, then return, |
266 | storing status in STATUS just as `wait' would. */ | |
267 | ||
16f6ab6b RP |
268 | static char *wait_strings[] = { |
269 | "At Breakpoint", | |
270 | "Exception: Data Access Fault (Local Bus Timeout)", | |
271 | "\r8???-Bug>", | |
c6f494e8 | 272 | "\r197-Bug>", |
16f6ab6b RP |
273 | NULL, |
274 | }; | |
275 | ||
be58e87e | 276 | int |
de43d7d0 SG |
277 | bug_wait (pid, status) |
278 | int pid; | |
67ac9759 | 279 | struct target_waitstatus *status; |
be58e87e | 280 | { |
c6f494e8 | 281 | int old_timeout = sr_get_timeout(); |
be58e87e RP |
282 | int old_immediate_quit = immediate_quit; |
283 | ||
67ac9759 JK |
284 | status->kind = TARGET_WAITKIND_EXITED; |
285 | status->value.integer = 0; | |
be58e87e | 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 */ |
67ac9759 JK |
302 | status->kind = TARGET_WAITKIND_STOPPED; |
303 | status->value.sig = TARGET_SIGNAL_TRAP; | |
16f6ab6b | 304 | /* user output from the target can be discarded here. (?) */ |
c6f494e8 | 305 | gr_expect_prompt(); |
16f6ab6b RP |
306 | break; |
307 | ||
308 | case 1: /* bus error */ | |
67ac9759 JK |
309 | status->kind = TARGET_WAITKIND_STOPPED; |
310 | status->value.sig = TARGET_SIGNAL_BUS; | |
16f6ab6b | 311 | /* user output from the target can be discarded here. (?) */ |
c6f494e8 | 312 | gr_expect_prompt(); |
16f6ab6b RP |
313 | break; |
314 | ||
315 | case 2: /* normal case */ | |
c6f494e8 | 316 | case 3: |
16f6ab6b RP |
317 | if (need_artificial_trap != 0) |
318 | { | |
319 | /* stepping */ | |
67ac9759 JK |
320 | status->kind = TARGET_WAITKIND_STOPPED; |
321 | status->value.sig = TARGET_SIGNAL_TRAP; | |
16f6ab6b RP |
322 | need_artificial_trap--; |
323 | break; | |
324 | } | |
325 | else | |
326 | { | |
327 | /* exit case */ | |
67ac9759 JK |
328 | status->kind = TARGET_WAITKIND_EXITED; |
329 | status->value.integer = 0; | |
16f6ab6b RP |
330 | break; |
331 | } | |
be58e87e | 332 | |
16f6ab6b RP |
333 | case -1: /* trouble */ |
334 | default: | |
335 | fprintf_filtered (stderr, | |
336 | "Trouble reading target during wait\n"); | |
337 | break; | |
338 | } | |
5905161c | 339 | |
c6f494e8 | 340 | sr_set_timeout(old_timeout); |
5905161c RP |
341 | immediate_quit = old_immediate_quit; |
342 | return 0; | |
343 | } | |
344 | ||
345 | /* Return the name of register number REGNO | |
346 | in the form input and output by bug. | |
347 | ||
348 | Returns a pointer to a static buffer containing the answer. */ | |
349 | static char * | |
350 | get_reg_name (regno) | |
351 | int regno; | |
352 | { | |
353 | static char *rn[] = { | |
354 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", | |
355 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
356 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
357 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
358 | ||
359 | /* these get confusing because we omit a few and switch some ordering around. */ | |
360 | ||
361 | "cr01", /* 32 = psr */ | |
362 | "fcr62", /* 33 = fpsr*/ | |
363 | "fcr63", /* 34 = fpcr */ | |
be58e87e RP |
364 | "ip", /* this is something of a cheat. */ |
365 | /* 35 = sxip */ | |
5905161c RP |
366 | "cr05", /* 36 = snip */ |
367 | "cr06", /* 37 = sfip */ | |
c6f494e8 RP |
368 | |
369 | "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07", | |
370 | "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15", | |
371 | "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", | |
372 | "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", | |
5905161c RP |
373 | }; |
374 | ||
375 | return rn[regno]; | |
376 | } | |
377 | ||
16f6ab6b | 378 | #if 0 /* not currently used */ |
be58e87e RP |
379 | /* Read from remote while the input matches STRING. Return zero on |
380 | success, -1 on failure. */ | |
381 | ||
382 | static int | |
383 | bug_scan (s) | |
384 | char *s; | |
385 | { | |
386 | int c; | |
387 | ||
388 | while (*s) | |
389 | { | |
c6f494e8 | 390 | c = sr_readchar(); |
be58e87e RP |
391 | if (c != *s++) |
392 | { | |
393 | fflush(stdout); | |
394 | printf("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
395 | return(-1); | |
396 | } | |
397 | } | |
398 | ||
399 | return(0); | |
400 | } | |
16f6ab6b | 401 | #endif /* never */ |
be58e87e RP |
402 | |
403 | static int | |
404 | bug_srec_write_cr (s) | |
405 | char *s; | |
406 | { | |
407 | char *p = s; | |
408 | ||
409 | if (srec_echo_pace) | |
410 | for (p = s; *p; ++p) | |
411 | { | |
c6f494e8 | 412 | if (sr_get_debug() > 0) |
be58e87e RP |
413 | printf ("%c", *p); |
414 | ||
415 | do | |
c6f494e8 RP |
416 | SERIAL_WRITE(sr_get_desc(), p, 1); |
417 | while (sr_pollchar() != *p); | |
be58e87e RP |
418 | } |
419 | else | |
420 | { | |
c6f494e8 | 421 | sr_write_cr (s); |
be58e87e RP |
422 | /* return(bug_scan (s) || bug_scan ("\n")); */ |
423 | } | |
424 | ||
425 | return(0); | |
5905161c RP |
426 | } |
427 | ||
428 | /* Store register REGNO, or all if REGNO == -1. */ | |
429 | ||
430 | static void | |
431 | bug_fetch_register(regno) | |
432 | int regno; | |
433 | { | |
c6f494e8 | 434 | sr_check_open(); |
5905161c RP |
435 | |
436 | if (regno == -1) | |
437 | { | |
438 | int i; | |
439 | ||
440 | for (i = 0; i < NUM_REGS; ++i) | |
441 | bug_fetch_register(i); | |
442 | } | |
817ac7f8 RP |
443 | else if (target_is_m88110 && regno == SFIP_REGNUM) |
444 | { | |
445 | /* m88110 has no sfip. */ | |
446 | long l = 0; | |
447 | supply_register(regno, (char *) &l); | |
448 | } | |
c6f494e8 | 449 | else if (regno < XFP_REGNUM) |
5905161c | 450 | { |
f4f0d174 JK |
451 | char buffer[MAX_REGISTER_RAW_SIZE]; |
452 | ||
453 | sr_write ("rs ", 3); | |
454 | sr_write_cr (get_reg_name(regno)); | |
455 | sr_expect ("="); | |
456 | store_unsigned_integer (buffer, REGISTER_RAW_SIZE (regno), | |
457 | sr_get_hex_word()); | |
458 | gr_expect_prompt (); | |
459 | supply_register (regno, buffer); | |
5905161c | 460 | } |
c6f494e8 RP |
461 | else |
462 | { | |
463 | /* Float register so we need to parse a strange data format. */ | |
464 | long p; | |
465 | unsigned char value[10]; | |
466 | ||
467 | sr_write("rs ", 3); | |
468 | sr_write(get_reg_name(regno), strlen(get_reg_name(regno))); | |
469 | sr_write_cr(";d"); | |
470 | sr_expect("rs"); | |
471 | sr_expect(get_reg_name(regno)); | |
472 | sr_expect(";d"); | |
473 | sr_expect("="); | |
474 | ||
475 | /* sign */ | |
476 | p = sr_get_hex_digit(1); | |
477 | value[0] = p << 7; | |
478 | ||
479 | /* exponent */ | |
480 | sr_expect("_"); | |
481 | p = sr_get_hex_digit(1); | |
482 | value[0] += (p << 4); | |
483 | value[0] += sr_get_hex_digit(1); | |
484 | ||
485 | value[1] = sr_get_hex_digit(1) << 4; | |
486 | ||
487 | /* fraction */ | |
488 | sr_expect("_"); | |
489 | value[1] += sr_get_hex_digit(1); | |
490 | ||
491 | value[2] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
492 | value[3] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
493 | value[4] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
494 | value[5] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
495 | value[6] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
496 | value[7] = (sr_get_hex_digit(1) << 4) + sr_get_hex_digit(1); | |
497 | value[8] = 0; | |
498 | value[9] = 0; | |
499 | ||
500 | gr_expect_prompt(); | |
501 | supply_register(regno, value); | |
502 | } | |
5905161c RP |
503 | |
504 | return; | |
505 | } | |
506 | ||
507 | /* Store register REGNO, or all if REGNO == -1. */ | |
508 | ||
509 | static void | |
510 | bug_store_register (regno) | |
511 | int regno; | |
512 | { | |
5905161c | 513 | char buffer[1024]; |
c6f494e8 | 514 | sr_check_open(); |
5905161c RP |
515 | |
516 | if (regno == -1) | |
517 | { | |
518 | int i; | |
519 | ||
520 | for (i = 0; i < NUM_REGS; ++i) | |
521 | bug_store_register(i); | |
522 | } | |
523 | else | |
524 | { | |
525 | char *regname; | |
526 | ||
c6f494e8 | 527 | regname = get_reg_name(regno); |
5905161c | 528 | |
817ac7f8 RP |
529 | if (target_is_m88110 && regno == SFIP_REGNUM) |
530 | return; | |
531 | else if (regno < XFP_REGNUM) | |
c6f494e8 RP |
532 | sprintf(buffer, "rs %s %08x", |
533 | regname, | |
534 | read_register(regno)); | |
535 | else | |
536 | { | |
537 | unsigned char *value = ®isters[REGISTER_BYTE(regno)]; | |
538 | ||
817ac7f8 | 539 | sprintf(buffer, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d", |
c6f494e8 RP |
540 | regname, |
541 | /* sign */ | |
542 | (value[0] >> 7) & 0xf, | |
543 | /* exponent */ | |
544 | value[0] & 0x7f, | |
545 | (value[1] >> 8) & 0xf, | |
546 | /* fraction */ | |
547 | value[1] & 0xf, | |
548 | value[2], | |
549 | value[3], | |
550 | value[4], | |
551 | value[5], | |
552 | value[6], | |
553 | value[7]); | |
554 | } | |
5905161c | 555 | |
c6f494e8 RP |
556 | sr_write_cr(buffer); |
557 | gr_expect_prompt(); | |
5905161c RP |
558 | } |
559 | ||
560 | return; | |
561 | } | |
562 | ||
5905161c | 563 | int |
c6f494e8 | 564 | bug_xfer_memory (memaddr, myaddr, len, write, target) |
5905161c RP |
565 | CORE_ADDR memaddr; |
566 | char *myaddr; | |
567 | int len; | |
568 | int write; | |
569 | struct target_ops *target; /* ignored */ | |
570 | { | |
571 | register int i; | |
572 | ||
573 | /* Round starting address down to longword boundary. */ | |
574 | register CORE_ADDR addr; | |
575 | ||
576 | /* Round ending address up; get number of longwords that makes. */ | |
577 | register int count; | |
578 | ||
579 | /* Allocate buffer of that many longwords. */ | |
580 | register int *buffer; | |
581 | ||
582 | addr = memaddr & -sizeof (int); | |
583 | count = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
584 | ||
585 | buffer = (int *) alloca (count * sizeof (int)); | |
586 | ||
587 | if (write) | |
588 | { | |
589 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
590 | ||
591 | if (addr != memaddr || len < (int) sizeof (int)) | |
592 | { | |
593 | /* Need part of initial word -- fetch it. */ | |
c6f494e8 | 594 | buffer[0] = gr_fetch_word (addr); |
5905161c RP |
595 | } |
596 | ||
597 | if (count > 1) /* FIXME, avoid if even boundary */ | |
598 | { | |
599 | buffer[count - 1] | |
c6f494e8 | 600 | = gr_fetch_word (addr + (count - 1) * sizeof (int)); |
5905161c RP |
601 | } |
602 | ||
603 | /* Copy data to be written over corresponding part of buffer */ | |
604 | ||
ade40d31 | 605 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); |
5905161c RP |
606 | |
607 | /* Write the entire buffer. */ | |
608 | ||
609 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
610 | { | |
611 | errno = 0; | |
c6f494e8 | 612 | gr_store_word (addr, buffer[i]); |
5905161c RP |
613 | if (errno) |
614 | { | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
619 | } | |
620 | } | |
621 | else | |
622 | { | |
623 | /* Read all the longwords */ | |
624 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
625 | { | |
626 | errno = 0; | |
c6f494e8 | 627 | buffer[i] = gr_fetch_word (addr); |
5905161c RP |
628 | if (errno) |
629 | { | |
630 | return 0; | |
631 | } | |
632 | QUIT; | |
633 | } | |
634 | ||
635 | /* Copy appropriate bytes out of the buffer. */ | |
ade40d31 | 636 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); |
5905161c RP |
637 | } |
638 | ||
639 | return len; | |
640 | } | |
641 | ||
be58e87e RP |
642 | static void |
643 | start_load() | |
644 | { | |
645 | char *command; | |
646 | ||
647 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
648 | ||
c6f494e8 RP |
649 | sr_write_cr (command); |
650 | sr_expect (command); | |
651 | sr_expect ("\r\n"); | |
be58e87e RP |
652 | bug_srec_write_cr ("S0030000FC"); |
653 | return; | |
654 | } | |
655 | ||
656 | /* This is an extremely vulnerable and fragile function. I've made | |
657 | considerable attempts to make this deterministic, but I've | |
658 | certainly forgotten something. The trouble is that S-records are | |
659 | only a partial file format, not a protocol. Worse, apparently the | |
660 | m88k bug monitor does not run in real time while receiving | |
661 | S-records. Hence, we must pay excruciating attention to when and | |
662 | where error messages are returned, and what has actually been sent. | |
5905161c | 663 | |
be58e87e RP |
664 | Each call represents a chunk of memory to be sent to the target. |
665 | We break that chunk into an S0 header record, some number of S3 | |
666 | data records each containing srec_bytes, and an S7 termination | |
667 | record. */ | |
668 | ||
16f6ab6b RP |
669 | static char *srecord_strings[] = { |
670 | "S-RECORD", | |
c6f494e8 | 671 | "-Bug>", |
16f6ab6b RP |
672 | NULL, |
673 | }; | |
674 | ||
be58e87e | 675 | static int |
c6f494e8 | 676 | bug_write_memory (memaddr, myaddr, len) |
5905161c RP |
677 | CORE_ADDR memaddr; |
678 | unsigned char *myaddr; | |
679 | int len; | |
680 | { | |
681 | int done; | |
5905161c | 682 | int checksum; |
be58e87e RP |
683 | int x; |
684 | int retries; | |
685 | char buffer[(srec_bytes + 8) << 1]; | |
5905161c | 686 | |
be58e87e | 687 | retries = 0; |
5905161c | 688 | |
be58e87e | 689 | do |
5905161c | 690 | { |
be58e87e RP |
691 | done = 0; |
692 | ||
693 | if (retries > srec_max_retries) | |
694 | return(-1); | |
695 | ||
696 | if (retries > 0) | |
5905161c | 697 | { |
c6f494e8 | 698 | if (sr_get_debug() > 0) |
be58e87e RP |
699 | printf("\n<retrying...>\n"); |
700 | ||
c6f494e8 | 701 | /* This gr_expect_prompt call is extremely important. Without |
be58e87e RP |
702 | it, we will tend to resend our packet so fast that it |
703 | will arrive before the bug monitor is ready to receive | |
704 | it. This would lead to a very ugly resend loop. */ | |
705 | ||
c6f494e8 | 706 | gr_expect_prompt(); |
5905161c | 707 | } |
5905161c | 708 | |
be58e87e RP |
709 | start_load(); |
710 | ||
711 | while (done < len) | |
712 | { | |
713 | int thisgo; | |
714 | int idx; | |
715 | char *buf = buffer; | |
716 | CORE_ADDR address; | |
717 | ||
718 | checksum = 0; | |
719 | thisgo = len - done; | |
720 | if (thisgo > srec_bytes) | |
721 | thisgo = srec_bytes; | |
722 | ||
723 | address = memaddr + done; | |
724 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
725 | buf += 12; | |
726 | ||
727 | checksum += (thisgo + 4 + 1 | |
728 | + (address & 0xff) | |
729 | + ((address >> 8) & 0xff) | |
730 | + ((address >> 16) & 0xff) | |
731 | + ((address >> 24) & 0xff)); | |
732 | ||
733 | for (idx = 0; idx < thisgo; idx++) | |
734 | { | |
735 | sprintf (buf, "%02X", myaddr[idx + done]); | |
736 | checksum += myaddr[idx + done]; | |
737 | buf += 2; | |
738 | } | |
739 | ||
740 | if (srec_noise > 0) | |
741 | { | |
742 | /* FIXME-NOW: insert a deliberate error every now and then. | |
743 | This is intended for testing/debugging the error handling | |
744 | stuff. */ | |
745 | static int counter = 0; | |
746 | if (++counter > srec_noise) | |
747 | { | |
748 | counter = 0; | |
749 | ++checksum; | |
750 | } | |
751 | } | |
752 | ||
753 | sprintf(buf, "%02X", ~checksum & 0xff); | |
754 | bug_srec_write_cr (buffer); | |
755 | ||
756 | if (srec_sleep != 0) | |
757 | sleep(srec_sleep); | |
758 | ||
c6f494e8 | 759 | /* This pollchar is probably redundant to the gr_multi_scan |
be58e87e RP |
760 | below. Trouble is, we can't be sure when or where an |
761 | error message will appear. Apparently, when running at | |
762 | full speed from a typical sun4, error messages tend to | |
763 | appear to arrive only *after* the s7 record. */ | |
764 | ||
c6f494e8 | 765 | if ((x = sr_pollchar()) != 0) |
be58e87e | 766 | { |
c6f494e8 | 767 | if (sr_get_debug() > 0) |
be58e87e RP |
768 | printf("\n<retrying...>\n"); |
769 | ||
770 | ++retries; | |
771 | ||
772 | /* flush any remaining input and verify that we are back | |
773 | at the prompt level. */ | |
c6f494e8 | 774 | gr_expect_prompt(); |
be58e87e RP |
775 | /* start all over again. */ |
776 | start_load(); | |
777 | done = 0; | |
778 | continue; | |
779 | } | |
780 | ||
781 | done += thisgo; | |
782 | } | |
783 | ||
784 | bug_srec_write_cr("S7060000000000F9"); | |
785 | ++retries; | |
786 | ||
787 | /* Having finished the load, we need to figure out whether we | |
788 | had any errors. */ | |
c6f494e8 | 789 | } while (gr_multi_scan(srecord_strings, 0) == 0);; |
be58e87e RP |
790 | |
791 | return(0); | |
5905161c RP |
792 | } |
793 | ||
5905161c RP |
794 | /* Copy LEN bytes of data from debugger memory at MYADDR |
795 | to inferior's memory at MEMADDR. Returns errno value. | |
796 | * sb/sh instructions don't work on unaligned addresses, when TU=1. | |
797 | */ | |
798 | ||
799 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
800 | at debugger address MYADDR. Returns errno value. */ | |
be58e87e | 801 | static int |
c6f494e8 | 802 | bug_read_memory (memaddr, myaddr, len) |
5905161c | 803 | CORE_ADDR memaddr; |
755892d6 | 804 | unsigned char *myaddr; |
5905161c RP |
805 | int len; |
806 | { | |
807 | char request[100]; | |
808 | char *buffer; | |
809 | char *p; | |
810 | char type; | |
811 | char size; | |
812 | unsigned char c; | |
813 | unsigned int inaddr; | |
814 | unsigned int checksum; | |
815 | ||
816 | sprintf(request, "du 0 %x:&%d", memaddr, len); | |
c6f494e8 | 817 | sr_write_cr(request); |
5905161c RP |
818 | |
819 | p = buffer = alloca(len); | |
820 | ||
821 | /* scan up through the header */ | |
c6f494e8 | 822 | sr_expect("S0030000FC"); |
5905161c RP |
823 | |
824 | while (p < buffer + len) | |
825 | { | |
826 | /* scan off any white space. */ | |
c6f494e8 | 827 | while (sr_readchar() != 'S') ;; |
5905161c RP |
828 | |
829 | /* what kind of s-rec? */ | |
c6f494e8 | 830 | type = sr_readchar(); |
5905161c RP |
831 | |
832 | /* scan record size */ | |
c6f494e8 | 833 | sr_get_hex_byte(&size); |
5905161c RP |
834 | checksum = size; |
835 | --size; | |
836 | inaddr = 0; | |
837 | ||
838 | switch (type) | |
839 | { | |
840 | case '7': | |
841 | case '8': | |
842 | case '9': | |
843 | goto done; | |
844 | ||
845 | case '3': | |
c6f494e8 | 846 | sr_get_hex_byte(&c); |
5905161c RP |
847 | inaddr = (inaddr << 8) + c; |
848 | checksum += c; | |
849 | --size; | |
850 | /* intentional fall through */ | |
851 | case '2': | |
c6f494e8 | 852 | sr_get_hex_byte(&c); |
5905161c RP |
853 | inaddr = (inaddr << 8) + c; |
854 | checksum += c; | |
855 | --size; | |
856 | /* intentional fall through */ | |
857 | case '1': | |
c6f494e8 | 858 | sr_get_hex_byte(&c); |
5905161c RP |
859 | inaddr = (inaddr << 8) + c; |
860 | checksum += c; | |
861 | --size; | |
c6f494e8 | 862 | sr_get_hex_byte(&c); |
5905161c RP |
863 | inaddr = (inaddr << 8) + c; |
864 | checksum += c; | |
865 | --size; | |
866 | break; | |
867 | ||
868 | default: | |
869 | /* bonk */ | |
870 | error("reading s-records."); | |
871 | } | |
872 | ||
873 | if (inaddr < memaddr | |
874 | || (memaddr + len) < (inaddr + size)) | |
875 | error("srec out of memory range."); | |
876 | ||
877 | if (p != buffer + inaddr - memaddr) | |
878 | error("srec out of sequence."); | |
879 | ||
880 | for (; size; --size, ++p) | |
881 | { | |
c6f494e8 | 882 | sr_get_hex_byte(p); |
5905161c RP |
883 | checksum += *p; |
884 | } | |
885 | ||
c6f494e8 | 886 | sr_get_hex_byte(&c); |
5905161c RP |
887 | if (c != (~checksum & 0xff)) |
888 | error("bad s-rec checksum"); | |
889 | } | |
890 | ||
891 | done: | |
c6f494e8 | 892 | gr_expect_prompt(); |
5905161c RP |
893 | if (p != buffer + len) |
894 | return(1); | |
895 | ||
896 | memcpy(myaddr, buffer, len); | |
897 | return(0); | |
898 | } | |
899 | ||
5905161c RP |
900 | #define MAX_BREAKS 16 |
901 | static int num_brkpts = 0; | |
902 | static int | |
903 | bug_insert_breakpoint (addr, save) | |
904 | CORE_ADDR addr; | |
905 | char *save; /* Throw away, let bug save instructions */ | |
906 | { | |
c6f494e8 | 907 | sr_check_open (); |
5905161c RP |
908 | |
909 | if (num_brkpts < MAX_BREAKS) | |
910 | { | |
911 | char buffer[100]; | |
912 | ||
913 | num_brkpts++; | |
914 | sprintf (buffer, "br %x", addr); | |
c6f494e8 RP |
915 | sr_write_cr (buffer); |
916 | gr_expect_prompt (); | |
5905161c RP |
917 | return(0); |
918 | } | |
919 | else | |
920 | { | |
921 | fprintf_filtered (stderr, | |
922 | "Too many break points, break point not installed\n"); | |
923 | return(1); | |
924 | } | |
925 | ||
926 | } | |
927 | static int | |
928 | bug_remove_breakpoint (addr, save) | |
929 | CORE_ADDR addr; | |
930 | char *save; /* Throw away, let bug save instructions */ | |
931 | { | |
932 | if (num_brkpts > 0) | |
933 | { | |
934 | char buffer[100]; | |
935 | ||
936 | num_brkpts--; | |
937 | sprintf (buffer, "nobr %x", addr); | |
c6f494e8 RP |
938 | sr_write_cr (buffer); |
939 | gr_expect_prompt (); | |
5905161c RP |
940 | |
941 | } | |
942 | return (0); | |
943 | } | |
944 | ||
945 | /* Clear the bugs notion of what the break points are */ | |
946 | static int | |
947 | bug_clear_breakpoints () | |
948 | { | |
949 | ||
c6f494e8 | 950 | if (sr_is_open()) |
5905161c | 951 | { |
c6f494e8 RP |
952 | sr_write_cr ("nobr"); |
953 | sr_expect("nobr"); | |
954 | gr_expect_prompt (); | |
5905161c RP |
955 | } |
956 | num_brkpts = 0; | |
be58e87e | 957 | return(0); |
5905161c | 958 | } |
be58e87e | 959 | |
ae87844d | 960 | struct target_ops bug_ops = |
5905161c RP |
961 | { |
962 | "bug", "Remote BUG monitor", | |
963 | "Use the mvme187 board running the BUG monitor connected\n\ | |
964 | by a serial line.", | |
965 | ||
c6f494e8 RP |
966 | bug_open, gr_close, |
967 | 0, gr_detach, bug_resume, bug_wait, /* attach */ | |
5905161c | 968 | bug_fetch_register, bug_store_register, |
c6f494e8 RP |
969 | gr_prepare_to_store, |
970 | bug_xfer_memory, | |
971 | gr_files_info, | |
5905161c RP |
972 | bug_insert_breakpoint, bug_remove_breakpoint, /* Breakpoints */ |
973 | 0, 0, 0, 0, 0, /* Terminal handling */ | |
c6f494e8 | 974 | gr_kill, /* FIXME, kill */ |
5905161c RP |
975 | bug_load, |
976 | 0, /* lookup_symbol */ | |
c6f494e8 RP |
977 | gr_create_inferior, /* create_inferior */ |
978 | gr_mourn, /* mourn_inferior FIXME */ | |
5905161c RP |
979 | 0, /* can_run */ |
980 | 0, /* notice_signals */ | |
981 | process_stratum, 0, /* next */ | |
982 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ | |
983 | 0, 0, /* Section pointers */ | |
984 | OPS_MAGIC, /* Always the last thing */ | |
985 | }; | |
986 | ||
987 | void | |
988 | _initialize_remote_bug () | |
989 | { | |
990 | add_target (&bug_ops); | |
991 | ||
be58e87e RP |
992 | add_show_from_set |
993 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
994 | (char *) &srec_bytes, | |
995 | "\ | |
996 | Set the number of bytes represented in each S-record.\n\ | |
997 | This affects the communication protocol with the remote target.", | |
998 | &setlist), | |
999 | &showlist); | |
1000 | ||
1001 | add_show_from_set | |
1002 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
1003 | (char *) &srec_max_retries, | |
1004 | "\ | |
1005 | Set the number of retries for shipping S-records.\n\ | |
1006 | This affects the communication protocol with the remote target.", | |
1007 | &setlist), | |
1008 | &showlist); | |
1009 | ||
1010 | add_show_from_set | |
1011 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
1012 | (char *) &srec_frame, | |
1013 | "\ | |
1014 | Set the number of bytes in an S-record frame.\n\ | |
1015 | This affects the communication protocol with the remote target.", | |
1016 | &setlist), | |
1017 | &showlist); | |
1018 | ||
1019 | add_show_from_set | |
1020 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1021 | (char *) &srec_noise, | |
1022 | "\ | |
1023 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1024 | Zero means flub none at all. This affects the communication protocol\n\ | |
1025 | with the remote target.", | |
1026 | &setlist), | |
1027 | &showlist); | |
1028 | ||
1029 | add_show_from_set | |
1030 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1031 | (char *) &srec_sleep, | |
1032 | "\ | |
1033 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1034 | This affects the communication protocol with the remote target.", | |
1035 | &setlist), | |
1036 | &showlist); | |
1037 | ||
1038 | add_show_from_set | |
1039 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1040 | (char *) &srec_echo_pace, | |
1041 | "\ | |
1042 | Set echo-verification.\n\ | |
1043 | When on, use verification by echo when downloading S-records. This is\n\ | |
1044 | much slower, but generally more reliable.", | |
1045 | &setlist), | |
1046 | &showlist); | |
5905161c | 1047 | } |