Commit | Line | Data |
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c906108c SS |
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 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
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. | |
c906108c | 13 | |
c5aa993b JM |
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. | |
c906108c | 18 | |
c5aa993b JM |
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., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "inferior.h" | |
03f2053f | 26 | #include "gdb_wait.h" |
c906108c SS |
27 | |
28 | #include "gdb_string.h" | |
29 | #include <ctype.h> | |
30 | #include <fcntl.h> | |
31 | #include <signal.h> | |
32 | #include <setjmp.h> | |
33 | #include <errno.h> | |
34 | ||
35 | #include "terminal.h" | |
36 | #include "gdbcore.h" | |
37 | #include "gdbcmd.h" | |
38 | ||
39 | #include "remote-utils.h" | |
40 | ||
41 | ||
c5aa993b | 42 | extern int sleep (); |
c906108c SS |
43 | |
44 | /* External data declarations */ | |
45 | extern int stop_soon_quietly; /* for wait_for_inferior */ | |
46 | ||
47 | /* Forward data declarations */ | |
48 | extern struct target_ops bug_ops; /* Forward declaration */ | |
49 | ||
50 | /* Forward function declarations */ | |
a14ed312 | 51 | static int bug_clear_breakpoints (void); |
c906108c | 52 | |
a14ed312 KB |
53 | static int bug_read_memory (CORE_ADDR memaddr, |
54 | unsigned char *myaddr, int len); | |
c906108c | 55 | |
a14ed312 KB |
56 | static int bug_write_memory (CORE_ADDR memaddr, |
57 | unsigned char *myaddr, int len); | |
c906108c SS |
58 | |
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 | #define SREC_SIZE 160 | |
70 | static int srec_frame = SREC_SIZE; | |
71 | ||
72 | /* This variable determines how many bytes will be represented in each | |
73 | S3 s-record. */ | |
74 | ||
75 | static int srec_bytes = 40; | |
76 | ||
77 | /* At one point it appeared to me as though the bug monitor could not | |
78 | really be expected to receive two sequential characters at 9600 | |
79 | baud reliably. Echo-pacing is an attempt to force data across the | |
80 | line even in this condition. Specifically, in echo-pace mode, each | |
81 | character is sent one at a time and we look for the echo before | |
82 | sending the next. This is excruciatingly slow. */ | |
83 | ||
84 | static int srec_echo_pace = 0; | |
85 | ||
86 | /* How long to wait after an srec for a possible error message. | |
87 | Similar to the above, I tried sleeping after sending each S3 record | |
88 | in hopes that I might actually see error messages from the bug | |
89 | monitor. This might actually work if we were to use sleep | |
90 | intervals smaller than 1 second. */ | |
91 | ||
92 | static int srec_sleep = 0; | |
93 | ||
94 | /* Every srec_noise records, flub the checksum. This is a debugging | |
95 | feature. Set the variable to something other than 1 in order to | |
96 | inject *deliberate* checksum errors. One might do this if one | |
97 | wanted to test error handling and recovery. */ | |
98 | ||
99 | static int srec_noise = 0; | |
100 | ||
101 | /* Called when SIGALRM signal sent due to alarm() timeout. */ | |
102 | ||
103 | /* Number of SIGTRAPs we need to simulate. That is, the next | |
104 | NEED_ARTIFICIAL_TRAP calls to bug_wait should just return | |
105 | SIGTRAP without actually waiting for anything. */ | |
106 | ||
107 | static int need_artificial_trap = 0; | |
108 | ||
109 | /* | |
110 | * Download a file specified in 'args', to the bug. | |
111 | */ | |
112 | ||
113 | static void | |
114 | bug_load (args, fromtty) | |
115 | char *args; | |
116 | int fromtty; | |
117 | { | |
118 | bfd *abfd; | |
119 | asection *s; | |
120 | char buffer[1024]; | |
121 | ||
122 | sr_check_open (); | |
123 | ||
c5aa993b | 124 | dcache_flush (gr_get_dcache ()); |
c906108c SS |
125 | inferior_pid = 0; |
126 | abfd = bfd_openr (args, 0); | |
127 | if (!abfd) | |
128 | { | |
129 | printf_filtered ("Unable to open file %s\n", args); | |
130 | return; | |
131 | } | |
132 | ||
133 | if (bfd_check_format (abfd, bfd_object) == 0) | |
134 | { | |
135 | printf_filtered ("File is not an object file\n"); | |
136 | return; | |
137 | } | |
138 | ||
139 | s = abfd->sections; | |
140 | while (s != (asection *) NULL) | |
141 | { | |
142 | srec_frame = SREC_SIZE; | |
143 | if (s->flags & SEC_LOAD) | |
144 | { | |
145 | int i; | |
146 | ||
147 | char *buffer = xmalloc (srec_frame); | |
148 | ||
149 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size); | |
150 | gdb_flush (gdb_stdout); | |
151 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
152 | { | |
153 | if (srec_frame > s->_raw_size - i) | |
154 | srec_frame = s->_raw_size - i; | |
155 | ||
156 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); | |
157 | bug_write_memory (s->vma + i, buffer, srec_frame); | |
158 | printf_filtered ("*"); | |
159 | gdb_flush (gdb_stdout); | |
160 | } | |
161 | printf_filtered ("\n"); | |
162 | free (buffer); | |
163 | } | |
164 | s = s->next; | |
165 | } | |
166 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); | |
167 | sr_write_cr (buffer); | |
168 | gr_expect_prompt (); | |
169 | } | |
170 | ||
171 | #if 0 | |
172 | static char * | |
173 | get_word (p) | |
174 | char **p; | |
175 | { | |
176 | char *s = *p; | |
177 | char *word; | |
178 | char *copy; | |
179 | size_t len; | |
180 | ||
181 | while (isspace (*s)) | |
182 | s++; | |
183 | ||
184 | word = s; | |
185 | ||
186 | len = 0; | |
187 | ||
188 | while (*s && !isspace (*s)) | |
189 | { | |
190 | s++; | |
191 | len++; | |
192 | ||
193 | } | |
194 | copy = xmalloc (len + 1); | |
195 | memcpy (copy, word, len); | |
196 | copy[len] = 0; | |
197 | *p = s; | |
198 | return copy; | |
199 | } | |
200 | #endif | |
201 | ||
c5aa993b JM |
202 | static struct gr_settings bug_settings = |
203 | { | |
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 */ | |
c906108c SS |
211 | }; |
212 | ||
c5aa993b JM |
213 | static char *cpu_check_strings[] = |
214 | { | |
c906108c SS |
215 | "=", |
216 | "Invalid Register", | |
217 | }; | |
218 | ||
219 | static void | |
220 | bug_open (args, from_tty) | |
221 | char *args; | |
222 | int from_tty; | |
223 | { | |
224 | if (args == NULL) | |
c5aa993b | 225 | args = ""; |
c906108c | 226 | |
c5aa993b | 227 | gr_open (args, from_tty, &bug_settings); |
c906108c | 228 | /* decide *now* whether we are on an 88100 or an 88110 */ |
c5aa993b JM |
229 | sr_write_cr ("rs cr06"); |
230 | sr_expect ("rs cr06"); | |
c906108c | 231 | |
c5aa993b | 232 | switch (gr_multi_scan (cpu_check_strings, 0)) |
c906108c | 233 | { |
c5aa993b | 234 | case 0: /* this is an m88100 */ |
c906108c SS |
235 | target_is_m88110 = 0; |
236 | break; | |
c5aa993b | 237 | case 1: /* this is an m88110 */ |
c906108c SS |
238 | target_is_m88110 = 1; |
239 | break; | |
240 | default: | |
c5aa993b | 241 | abort (); |
c906108c SS |
242 | } |
243 | } | |
244 | ||
245 | /* Tell the remote machine to resume. */ | |
246 | ||
247 | void | |
248 | bug_resume (pid, step, sig) | |
249 | int pid, step; | |
250 | enum target_signal sig; | |
251 | { | |
c5aa993b | 252 | dcache_flush (gr_get_dcache ()); |
c906108c SS |
253 | |
254 | if (step) | |
255 | { | |
c5aa993b | 256 | sr_write_cr ("t"); |
c906108c SS |
257 | |
258 | /* Force the next bug_wait to return a trap. Not doing anything | |
c5aa993b JM |
259 | about I/O from the target means that the user has to type |
260 | "continue" to see any. FIXME, this should be fixed. */ | |
c906108c SS |
261 | need_artificial_trap = 1; |
262 | } | |
263 | else | |
c5aa993b | 264 | sr_write_cr ("g"); |
c906108c SS |
265 | |
266 | return; | |
267 | } | |
268 | ||
269 | /* Wait until the remote machine stops, then return, | |
270 | storing status in STATUS just as `wait' would. */ | |
271 | ||
c5aa993b JM |
272 | static char *wait_strings[] = |
273 | { | |
c906108c SS |
274 | "At Breakpoint", |
275 | "Exception: Data Access Fault (Local Bus Timeout)", | |
c5aa993b | 276 | "\r8??\?-Bug>", /* The '\?' avoids creating a trigraph */ |
c906108c SS |
277 | "\r197-Bug>", |
278 | NULL, | |
279 | }; | |
280 | ||
281 | int | |
282 | bug_wait (pid, status) | |
283 | int pid; | |
284 | struct target_waitstatus *status; | |
285 | { | |
c5aa993b | 286 | int old_timeout = sr_get_timeout (); |
c906108c SS |
287 | int old_immediate_quit = immediate_quit; |
288 | ||
289 | status->kind = TARGET_WAITKIND_EXITED; | |
290 | status->value.integer = 0; | |
291 | ||
292 | /* read off leftovers from resume so that the rest can be passed | |
293 | back out as stdout. */ | |
294 | if (need_artificial_trap == 0) | |
295 | { | |
c5aa993b JM |
296 | sr_expect ("Effective address: "); |
297 | (void) sr_get_hex_word (); | |
c906108c SS |
298 | sr_expect ("\r\n"); |
299 | } | |
300 | ||
c5aa993b JM |
301 | sr_set_timeout (-1); /* Don't time out -- user program is running. */ |
302 | immediate_quit = 1; /* Helps ability to QUIT */ | |
c906108c | 303 | |
c5aa993b | 304 | switch (gr_multi_scan (wait_strings, need_artificial_trap == 0)) |
c906108c | 305 | { |
c5aa993b | 306 | case 0: /* breakpoint case */ |
c906108c SS |
307 | status->kind = TARGET_WAITKIND_STOPPED; |
308 | status->value.sig = TARGET_SIGNAL_TRAP; | |
309 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 310 | gr_expect_prompt (); |
c906108c SS |
311 | break; |
312 | ||
c5aa993b | 313 | case 1: /* bus error */ |
c906108c SS |
314 | status->kind = TARGET_WAITKIND_STOPPED; |
315 | status->value.sig = TARGET_SIGNAL_BUS; | |
316 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 317 | gr_expect_prompt (); |
c906108c SS |
318 | break; |
319 | ||
c5aa993b | 320 | case 2: /* normal case */ |
c906108c SS |
321 | case 3: |
322 | if (need_artificial_trap != 0) | |
323 | { | |
324 | /* stepping */ | |
325 | status->kind = TARGET_WAITKIND_STOPPED; | |
326 | status->value.sig = TARGET_SIGNAL_TRAP; | |
327 | need_artificial_trap--; | |
328 | break; | |
329 | } | |
330 | else | |
331 | { | |
332 | /* exit case */ | |
333 | status->kind = TARGET_WAITKIND_EXITED; | |
334 | status->value.integer = 0; | |
335 | break; | |
336 | } | |
337 | ||
c5aa993b | 338 | case -1: /* trouble */ |
c906108c SS |
339 | default: |
340 | fprintf_filtered (gdb_stderr, | |
341 | "Trouble reading target during wait\n"); | |
342 | break; | |
343 | } | |
344 | ||
c5aa993b | 345 | sr_set_timeout (old_timeout); |
c906108c SS |
346 | immediate_quit = old_immediate_quit; |
347 | return 0; | |
348 | } | |
349 | ||
350 | /* Return the name of register number REGNO | |
351 | in the form input and output by bug. | |
352 | ||
353 | Returns a pointer to a static buffer containing the answer. */ | |
354 | static char * | |
355 | get_reg_name (regno) | |
356 | int regno; | |
357 | { | |
c5aa993b JM |
358 | static char *rn[] = |
359 | { | |
c906108c SS |
360 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", |
361 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
362 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
363 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
364 | ||
c5aa993b | 365 | /* these get confusing because we omit a few and switch some ordering around. */ |
c906108c | 366 | |
c5aa993b JM |
367 | "cr01", /* 32 = psr */ |
368 | "fcr62", /* 33 = fpsr */ | |
369 | "fcr63", /* 34 = fpcr */ | |
c906108c SS |
370 | "ip", /* this is something of a cheat. */ |
371 | /* 35 = sxip */ | |
c5aa993b JM |
372 | "cr05", /* 36 = snip */ |
373 | "cr06", /* 37 = sfip */ | |
c906108c SS |
374 | |
375 | "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07", | |
376 | "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15", | |
377 | "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", | |
378 | "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", | |
379 | }; | |
380 | ||
381 | return rn[regno]; | |
382 | } | |
383 | ||
c5aa993b | 384 | #if 0 /* not currently used */ |
c906108c SS |
385 | /* Read from remote while the input matches STRING. Return zero on |
386 | success, -1 on failure. */ | |
387 | ||
388 | static int | |
389 | bug_scan (s) | |
390 | char *s; | |
391 | { | |
392 | int c; | |
393 | ||
394 | while (*s) | |
395 | { | |
c5aa993b | 396 | c = sr_readchar (); |
c906108c SS |
397 | if (c != *s++) |
398 | { | |
c5aa993b JM |
399 | fflush (stdout); |
400 | printf ("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
401 | return (-1); | |
c906108c SS |
402 | } |
403 | } | |
404 | ||
c5aa993b | 405 | return (0); |
c906108c SS |
406 | } |
407 | #endif /* never */ | |
408 | ||
409 | static int | |
410 | bug_srec_write_cr (s) | |
411 | char *s; | |
412 | { | |
413 | char *p = s; | |
414 | ||
415 | if (srec_echo_pace) | |
416 | for (p = s; *p; ++p) | |
417 | { | |
c5aa993b | 418 | if (sr_get_debug () > 0) |
c906108c SS |
419 | printf ("%c", *p); |
420 | ||
421 | do | |
c5aa993b JM |
422 | SERIAL_WRITE (sr_get_desc (), p, 1); |
423 | while (sr_pollchar () != *p); | |
c906108c SS |
424 | } |
425 | else | |
c5aa993b | 426 | { |
c906108c SS |
427 | sr_write_cr (s); |
428 | /* return(bug_scan (s) || bug_scan ("\n")); */ | |
429 | } | |
430 | ||
c5aa993b | 431 | return (0); |
c906108c SS |
432 | } |
433 | ||
434 | /* Store register REGNO, or all if REGNO == -1. */ | |
435 | ||
436 | static void | |
c5aa993b | 437 | bug_fetch_register (regno) |
c906108c SS |
438 | int regno; |
439 | { | |
c5aa993b | 440 | sr_check_open (); |
c906108c SS |
441 | |
442 | if (regno == -1) | |
443 | { | |
444 | int i; | |
445 | ||
446 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 447 | bug_fetch_register (i); |
c906108c SS |
448 | } |
449 | else if (target_is_m88110 && regno == SFIP_REGNUM) | |
450 | { | |
451 | /* m88110 has no sfip. */ | |
452 | long l = 0; | |
c5aa993b | 453 | supply_register (regno, (char *) &l); |
c906108c SS |
454 | } |
455 | else if (regno < XFP_REGNUM) | |
456 | { | |
457 | char buffer[MAX_REGISTER_RAW_SIZE]; | |
458 | ||
459 | sr_write ("rs ", 3); | |
c5aa993b | 460 | sr_write_cr (get_reg_name (regno)); |
c906108c SS |
461 | sr_expect ("="); |
462 | store_unsigned_integer (buffer, REGISTER_RAW_SIZE (regno), | |
c5aa993b | 463 | sr_get_hex_word ()); |
c906108c SS |
464 | gr_expect_prompt (); |
465 | supply_register (regno, buffer); | |
466 | } | |
467 | else | |
468 | { | |
469 | /* Float register so we need to parse a strange data format. */ | |
470 | long p; | |
471 | unsigned char fpreg_buf[10]; | |
472 | ||
c5aa993b JM |
473 | sr_write ("rs ", 3); |
474 | sr_write (get_reg_name (regno), strlen (get_reg_name (regno))); | |
475 | sr_write_cr (";d"); | |
476 | sr_expect ("rs"); | |
477 | sr_expect (get_reg_name (regno)); | |
478 | sr_expect (";d"); | |
479 | sr_expect ("="); | |
c906108c SS |
480 | |
481 | /* sign */ | |
c5aa993b | 482 | p = sr_get_hex_digit (1); |
c906108c SS |
483 | fpreg_buf[0] = p << 7; |
484 | ||
485 | /* exponent */ | |
c5aa993b JM |
486 | sr_expect ("_"); |
487 | p = sr_get_hex_digit (1); | |
c906108c | 488 | fpreg_buf[0] += (p << 4); |
c5aa993b | 489 | fpreg_buf[0] += sr_get_hex_digit (1); |
c906108c | 490 | |
c5aa993b | 491 | fpreg_buf[1] = sr_get_hex_digit (1) << 4; |
c906108c SS |
492 | |
493 | /* fraction */ | |
c5aa993b JM |
494 | sr_expect ("_"); |
495 | fpreg_buf[1] += sr_get_hex_digit (1); | |
496 | ||
497 | fpreg_buf[2] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
498 | fpreg_buf[3] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
499 | fpreg_buf[4] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
500 | fpreg_buf[5] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
501 | fpreg_buf[6] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
502 | fpreg_buf[7] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
c906108c SS |
503 | fpreg_buf[8] = 0; |
504 | fpreg_buf[9] = 0; | |
505 | ||
c5aa993b JM |
506 | gr_expect_prompt (); |
507 | supply_register (regno, fpreg_buf); | |
c906108c SS |
508 | } |
509 | ||
510 | return; | |
511 | } | |
512 | ||
513 | /* Store register REGNO, or all if REGNO == -1. */ | |
514 | ||
515 | static void | |
516 | bug_store_register (regno) | |
517 | int regno; | |
518 | { | |
519 | char buffer[1024]; | |
c5aa993b | 520 | sr_check_open (); |
c906108c SS |
521 | |
522 | if (regno == -1) | |
523 | { | |
524 | int i; | |
525 | ||
526 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 527 | bug_store_register (i); |
c906108c SS |
528 | } |
529 | else | |
530 | { | |
531 | char *regname; | |
532 | ||
c5aa993b | 533 | regname = get_reg_name (regno); |
c906108c SS |
534 | |
535 | if (target_is_m88110 && regno == SFIP_REGNUM) | |
536 | return; | |
537 | else if (regno < XFP_REGNUM) | |
c5aa993b JM |
538 | sprintf (buffer, "rs %s %08x", |
539 | regname, | |
540 | read_register (regno)); | |
c906108c SS |
541 | else |
542 | { | |
543 | unsigned char *fpreg_buf = | |
c5aa993b JM |
544 | (unsigned char *) ®isters[REGISTER_BYTE (regno)]; |
545 | ||
546 | sprintf (buffer, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d", | |
547 | regname, | |
548 | /* sign */ | |
549 | (fpreg_buf[0] >> 7) & 0xf, | |
550 | /* exponent */ | |
551 | fpreg_buf[0] & 0x7f, | |
552 | (fpreg_buf[1] >> 8) & 0xf, | |
553 | /* fraction */ | |
554 | fpreg_buf[1] & 0xf, | |
555 | fpreg_buf[2], | |
556 | fpreg_buf[3], | |
557 | fpreg_buf[4], | |
558 | fpreg_buf[5], | |
559 | fpreg_buf[6], | |
560 | fpreg_buf[7]); | |
c906108c SS |
561 | } |
562 | ||
c5aa993b JM |
563 | sr_write_cr (buffer); |
564 | gr_expect_prompt (); | |
c906108c SS |
565 | } |
566 | ||
567 | return; | |
568 | } | |
569 | ||
570 | int | |
571 | bug_xfer_memory (memaddr, myaddr, len, write, target) | |
572 | CORE_ADDR memaddr; | |
573 | char *myaddr; | |
574 | int len; | |
575 | int write; | |
576 | struct target_ops *target; /* ignored */ | |
577 | { | |
8c9cdfe8 C |
578 | if (len <= 0) |
579 | return 0; | |
c906108c | 580 | |
8c9cdfe8 | 581 | return dcache_xfer_memory (gr_get_dcache (), memaddr, myaddr, len, write); |
c906108c SS |
582 | } |
583 | ||
584 | static void | |
c5aa993b | 585 | start_load () |
c906108c SS |
586 | { |
587 | char *command; | |
588 | ||
589 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
590 | ||
591 | sr_write_cr (command); | |
592 | sr_expect (command); | |
593 | sr_expect ("\r\n"); | |
594 | bug_srec_write_cr ("S0030000FC"); | |
595 | return; | |
596 | } | |
597 | ||
598 | /* This is an extremely vulnerable and fragile function. I've made | |
599 | considerable attempts to make this deterministic, but I've | |
600 | certainly forgotten something. The trouble is that S-records are | |
601 | only a partial file format, not a protocol. Worse, apparently the | |
602 | m88k bug monitor does not run in real time while receiving | |
603 | S-records. Hence, we must pay excruciating attention to when and | |
604 | where error messages are returned, and what has actually been sent. | |
605 | ||
606 | Each call represents a chunk of memory to be sent to the target. | |
607 | We break that chunk into an S0 header record, some number of S3 | |
608 | data records each containing srec_bytes, and an S7 termination | |
609 | record. */ | |
610 | ||
c5aa993b JM |
611 | static char *srecord_strings[] = |
612 | { | |
c906108c SS |
613 | "S-RECORD", |
614 | "-Bug>", | |
615 | NULL, | |
616 | }; | |
617 | ||
618 | static int | |
619 | bug_write_memory (memaddr, myaddr, len) | |
620 | CORE_ADDR memaddr; | |
621 | unsigned char *myaddr; | |
622 | int len; | |
623 | { | |
624 | int done; | |
625 | int checksum; | |
626 | int x; | |
627 | int retries; | |
628 | char *buffer = alloca ((srec_bytes + 8) << 1); | |
629 | ||
630 | retries = 0; | |
631 | ||
632 | do | |
633 | { | |
634 | done = 0; | |
635 | ||
636 | if (retries > srec_max_retries) | |
c5aa993b | 637 | return (-1); |
c906108c SS |
638 | |
639 | if (retries > 0) | |
640 | { | |
c5aa993b JM |
641 | if (sr_get_debug () > 0) |
642 | printf ("\n<retrying...>\n"); | |
c906108c SS |
643 | |
644 | /* This gr_expect_prompt call is extremely important. Without | |
645 | it, we will tend to resend our packet so fast that it | |
646 | will arrive before the bug monitor is ready to receive | |
647 | it. This would lead to a very ugly resend loop. */ | |
648 | ||
c5aa993b | 649 | gr_expect_prompt (); |
c906108c SS |
650 | } |
651 | ||
c5aa993b | 652 | start_load (); |
c906108c SS |
653 | |
654 | while (done < len) | |
655 | { | |
656 | int thisgo; | |
657 | int idx; | |
658 | char *buf = buffer; | |
659 | CORE_ADDR address; | |
660 | ||
661 | checksum = 0; | |
662 | thisgo = len - done; | |
663 | if (thisgo > srec_bytes) | |
664 | thisgo = srec_bytes; | |
665 | ||
666 | address = memaddr + done; | |
667 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
668 | buf += 12; | |
669 | ||
670 | checksum += (thisgo + 4 + 1 | |
671 | + (address & 0xff) | |
c5aa993b | 672 | + ((address >> 8) & 0xff) |
c906108c SS |
673 | + ((address >> 16) & 0xff) |
674 | + ((address >> 24) & 0xff)); | |
675 | ||
676 | for (idx = 0; idx < thisgo; idx++) | |
677 | { | |
678 | sprintf (buf, "%02X", myaddr[idx + done]); | |
679 | checksum += myaddr[idx + done]; | |
680 | buf += 2; | |
681 | } | |
682 | ||
683 | if (srec_noise > 0) | |
684 | { | |
685 | /* FIXME-NOW: insert a deliberate error every now and then. | |
c5aa993b JM |
686 | This is intended for testing/debugging the error handling |
687 | stuff. */ | |
c906108c SS |
688 | static int counter = 0; |
689 | if (++counter > srec_noise) | |
690 | { | |
691 | counter = 0; | |
692 | ++checksum; | |
693 | } | |
694 | } | |
695 | ||
c5aa993b | 696 | sprintf (buf, "%02X", ~checksum & 0xff); |
c906108c SS |
697 | bug_srec_write_cr (buffer); |
698 | ||
699 | if (srec_sleep != 0) | |
c5aa993b | 700 | sleep (srec_sleep); |
c906108c SS |
701 | |
702 | /* This pollchar is probably redundant to the gr_multi_scan | |
703 | below. Trouble is, we can't be sure when or where an | |
704 | error message will appear. Apparently, when running at | |
705 | full speed from a typical sun4, error messages tend to | |
706 | appear to arrive only *after* the s7 record. */ | |
707 | ||
c5aa993b | 708 | if ((x = sr_pollchar ()) != 0) |
c906108c | 709 | { |
c5aa993b JM |
710 | if (sr_get_debug () > 0) |
711 | printf ("\n<retrying...>\n"); | |
c906108c SS |
712 | |
713 | ++retries; | |
714 | ||
715 | /* flush any remaining input and verify that we are back | |
c5aa993b JM |
716 | at the prompt level. */ |
717 | gr_expect_prompt (); | |
c906108c | 718 | /* start all over again. */ |
c5aa993b | 719 | start_load (); |
c906108c SS |
720 | done = 0; |
721 | continue; | |
722 | } | |
723 | ||
724 | done += thisgo; | |
725 | } | |
726 | ||
c5aa993b | 727 | bug_srec_write_cr ("S7060000000000F9"); |
c906108c SS |
728 | ++retries; |
729 | ||
730 | /* Having finished the load, we need to figure out whether we | |
c5aa993b JM |
731 | had any errors. */ |
732 | } | |
733 | while (gr_multi_scan (srecord_strings, 0) == 0);; | |
c906108c | 734 | |
c5aa993b | 735 | return (0); |
c906108c SS |
736 | } |
737 | ||
738 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
739 | to inferior's memory at MEMADDR. Returns errno value. | |
c5aa993b | 740 | * sb/sh instructions don't work on unaligned addresses, when TU=1. |
c906108c SS |
741 | */ |
742 | ||
743 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
744 | at debugger address MYADDR. Returns errno value. */ | |
745 | static int | |
746 | bug_read_memory (memaddr, myaddr, len) | |
747 | CORE_ADDR memaddr; | |
748 | unsigned char *myaddr; | |
749 | int len; | |
750 | { | |
751 | char request[100]; | |
752 | char *buffer; | |
753 | char *p; | |
754 | char type; | |
755 | char size; | |
756 | unsigned char c; | |
757 | unsigned int inaddr; | |
758 | unsigned int checksum; | |
759 | ||
c5aa993b JM |
760 | sprintf (request, "du 0 %x:&%d", memaddr, len); |
761 | sr_write_cr (request); | |
c906108c | 762 | |
c5aa993b | 763 | p = buffer = alloca (len); |
c906108c SS |
764 | |
765 | /* scan up through the header */ | |
c5aa993b | 766 | sr_expect ("S0030000FC"); |
c906108c SS |
767 | |
768 | while (p < buffer + len) | |
769 | { | |
770 | /* scan off any white space. */ | |
c5aa993b | 771 | while (sr_readchar () != 'S');; |
c906108c SS |
772 | |
773 | /* what kind of s-rec? */ | |
c5aa993b | 774 | type = sr_readchar (); |
c906108c SS |
775 | |
776 | /* scan record size */ | |
c5aa993b | 777 | sr_get_hex_byte (&size); |
c906108c SS |
778 | checksum = size; |
779 | --size; | |
780 | inaddr = 0; | |
781 | ||
782 | switch (type) | |
783 | { | |
784 | case '7': | |
785 | case '8': | |
786 | case '9': | |
787 | goto done; | |
788 | ||
789 | case '3': | |
c5aa993b | 790 | sr_get_hex_byte (&c); |
c906108c SS |
791 | inaddr = (inaddr << 8) + c; |
792 | checksum += c; | |
793 | --size; | |
794 | /* intentional fall through */ | |
795 | case '2': | |
c5aa993b | 796 | sr_get_hex_byte (&c); |
c906108c SS |
797 | inaddr = (inaddr << 8) + c; |
798 | checksum += c; | |
799 | --size; | |
800 | /* intentional fall through */ | |
801 | case '1': | |
c5aa993b | 802 | sr_get_hex_byte (&c); |
c906108c SS |
803 | inaddr = (inaddr << 8) + c; |
804 | checksum += c; | |
805 | --size; | |
c5aa993b | 806 | sr_get_hex_byte (&c); |
c906108c SS |
807 | inaddr = (inaddr << 8) + c; |
808 | checksum += c; | |
809 | --size; | |
810 | break; | |
811 | ||
812 | default: | |
813 | /* bonk */ | |
c5aa993b | 814 | error ("reading s-records."); |
c906108c SS |
815 | } |
816 | ||
817 | if (inaddr < memaddr | |
818 | || (memaddr + len) < (inaddr + size)) | |
c5aa993b | 819 | error ("srec out of memory range."); |
c906108c SS |
820 | |
821 | if (p != buffer + inaddr - memaddr) | |
c5aa993b | 822 | error ("srec out of sequence."); |
c906108c SS |
823 | |
824 | for (; size; --size, ++p) | |
825 | { | |
c5aa993b | 826 | sr_get_hex_byte (p); |
c906108c SS |
827 | checksum += *p; |
828 | } | |
829 | ||
c5aa993b | 830 | sr_get_hex_byte (&c); |
c906108c | 831 | if (c != (~checksum & 0xff)) |
c5aa993b | 832 | error ("bad s-rec checksum"); |
c906108c SS |
833 | } |
834 | ||
c5aa993b JM |
835 | done: |
836 | gr_expect_prompt (); | |
c906108c | 837 | if (p != buffer + len) |
c5aa993b | 838 | return (1); |
c906108c | 839 | |
c5aa993b JM |
840 | memcpy (myaddr, buffer, len); |
841 | return (0); | |
c906108c SS |
842 | } |
843 | ||
844 | #define MAX_BREAKS 16 | |
845 | static int num_brkpts = 0; | |
846 | static int | |
847 | bug_insert_breakpoint (addr, save) | |
848 | CORE_ADDR addr; | |
849 | char *save; /* Throw away, let bug save instructions */ | |
850 | { | |
851 | sr_check_open (); | |
852 | ||
853 | if (num_brkpts < MAX_BREAKS) | |
854 | { | |
855 | char buffer[100]; | |
856 | ||
857 | num_brkpts++; | |
858 | sprintf (buffer, "br %x", addr); | |
859 | sr_write_cr (buffer); | |
860 | gr_expect_prompt (); | |
c5aa993b | 861 | return (0); |
c906108c SS |
862 | } |
863 | else | |
864 | { | |
865 | fprintf_filtered (gdb_stderr, | |
866 | "Too many break points, break point not installed\n"); | |
c5aa993b | 867 | return (1); |
c906108c SS |
868 | } |
869 | ||
870 | } | |
871 | static int | |
872 | bug_remove_breakpoint (addr, save) | |
873 | CORE_ADDR addr; | |
874 | char *save; /* Throw away, let bug save instructions */ | |
875 | { | |
876 | if (num_brkpts > 0) | |
877 | { | |
878 | char buffer[100]; | |
879 | ||
880 | num_brkpts--; | |
881 | sprintf (buffer, "nobr %x", addr); | |
882 | sr_write_cr (buffer); | |
883 | gr_expect_prompt (); | |
884 | ||
885 | } | |
886 | return (0); | |
887 | } | |
888 | ||
889 | /* Clear the bugs notion of what the break points are */ | |
890 | static int | |
891 | bug_clear_breakpoints () | |
892 | { | |
893 | ||
c5aa993b | 894 | if (sr_is_open ()) |
c906108c SS |
895 | { |
896 | sr_write_cr ("nobr"); | |
c5aa993b | 897 | sr_expect ("nobr"); |
c906108c SS |
898 | gr_expect_prompt (); |
899 | } | |
900 | num_brkpts = 0; | |
c5aa993b | 901 | return (0); |
c906108c SS |
902 | } |
903 | ||
c5aa993b | 904 | struct target_ops bug_ops; |
c906108c | 905 | |
c5aa993b JM |
906 | static void |
907 | init_bug_ops (void) | |
c906108c | 908 | { |
c5aa993b JM |
909 | bug_ops.to_shortname = "bug"; |
910 | "Remote BUG monitor", | |
911 | bug_ops.to_longname = "Use the mvme187 board running the BUG monitor connected by a serial line."; | |
912 | bug_ops.to_doc = " "; | |
913 | bug_ops.to_open = bug_open; | |
914 | bug_ops.to_close = gr_close; | |
915 | bug_ops.to_attach = 0; | |
c906108c SS |
916 | bug_ops.to_post_attach = NULL; |
917 | bug_ops.to_require_attach = NULL; | |
c5aa993b | 918 | bug_ops.to_detach = gr_detach; |
c906108c | 919 | bug_ops.to_require_detach = NULL; |
c5aa993b JM |
920 | bug_ops.to_resume = bug_resume; |
921 | bug_ops.to_wait = bug_wait; | |
c906108c | 922 | bug_ops.to_post_wait = NULL; |
c5aa993b JM |
923 | bug_ops.to_fetch_registers = bug_fetch_register; |
924 | bug_ops.to_store_registers = bug_store_register; | |
925 | bug_ops.to_prepare_to_store = gr_prepare_to_store; | |
926 | bug_ops.to_xfer_memory = bug_xfer_memory; | |
927 | bug_ops.to_files_info = gr_files_info; | |
928 | bug_ops.to_insert_breakpoint = bug_insert_breakpoint; | |
929 | bug_ops.to_remove_breakpoint = bug_remove_breakpoint; | |
930 | bug_ops.to_terminal_init = 0; | |
931 | bug_ops.to_terminal_inferior = 0; | |
932 | bug_ops.to_terminal_ours_for_output = 0; | |
933 | bug_ops.to_terminal_ours = 0; | |
934 | bug_ops.to_terminal_info = 0; | |
935 | bug_ops.to_kill = gr_kill; | |
936 | bug_ops.to_load = bug_load; | |
937 | bug_ops.to_lookup_symbol = 0; | |
938 | bug_ops.to_create_inferior = gr_create_inferior; | |
c906108c SS |
939 | bug_ops.to_post_startup_inferior = NULL; |
940 | bug_ops.to_acknowledge_created_inferior = NULL; | |
c5aa993b JM |
941 | bug_ops.to_clone_and_follow_inferior = NULL; |
942 | bug_ops.to_post_follow_inferior_by_clone = NULL; | |
c906108c SS |
943 | bug_ops.to_insert_fork_catchpoint = NULL; |
944 | bug_ops.to_remove_fork_catchpoint = NULL; | |
945 | bug_ops.to_insert_vfork_catchpoint = NULL; | |
c5aa993b | 946 | bug_ops.to_remove_vfork_catchpoint = NULL; |
c906108c | 947 | bug_ops.to_has_forked = NULL; |
c5aa993b JM |
948 | bug_ops.to_has_vforked = NULL; |
949 | bug_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
c906108c SS |
950 | bug_ops.to_post_follow_vfork = NULL; |
951 | bug_ops.to_insert_exec_catchpoint = NULL; | |
952 | bug_ops.to_remove_exec_catchpoint = NULL; | |
953 | bug_ops.to_has_execd = NULL; | |
954 | bug_ops.to_reported_exec_events_per_exec_call = NULL; | |
955 | bug_ops.to_has_exited = NULL; | |
c5aa993b JM |
956 | bug_ops.to_mourn_inferior = gr_mourn; |
957 | bug_ops.to_can_run = 0; | |
958 | bug_ops.to_notice_signals = 0; | |
959 | bug_ops.to_thread_alive = 0; | |
960 | bug_ops.to_stop = 0; | |
c906108c SS |
961 | bug_ops.to_pid_to_exec_file = NULL; |
962 | bug_ops.to_core_file_to_sym_file = NULL; | |
c5aa993b JM |
963 | bug_ops.to_stratum = process_stratum; |
964 | bug_ops.DONT_USE = 0; | |
965 | bug_ops.to_has_all_memory = 1; | |
966 | bug_ops.to_has_memory = 1; | |
967 | bug_ops.to_has_stack = 1; | |
968 | bug_ops.to_has_registers = 0; | |
969 | bug_ops.to_has_execution = 0; | |
970 | bug_ops.to_sections = 0; | |
971 | bug_ops.to_sections_end = 0; | |
972 | bug_ops.to_magic = OPS_MAGIC; /* Always the last thing */ | |
973 | } /* init_bug_ops */ | |
c906108c SS |
974 | |
975 | void | |
976 | _initialize_remote_bug () | |
977 | { | |
c5aa993b | 978 | init_bug_ops (); |
c906108c SS |
979 | add_target (&bug_ops); |
980 | ||
981 | add_show_from_set | |
982 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
983 | (char *) &srec_bytes, | |
984 | "\ | |
985 | Set the number of bytes represented in each S-record.\n\ | |
986 | This affects the communication protocol with the remote target.", | |
987 | &setlist), | |
988 | &showlist); | |
989 | ||
990 | add_show_from_set | |
991 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
992 | (char *) &srec_max_retries, | |
993 | "\ | |
994 | Set the number of retries for shipping S-records.\n\ | |
995 | This affects the communication protocol with the remote target.", | |
996 | &setlist), | |
997 | &showlist); | |
998 | ||
999 | #if 0 | |
1000 | /* This needs to set SREC_SIZE, not srec_frame which gets changed at the | |
1001 | end of a download. But do we need the option at all? */ | |
1002 | add_show_from_set | |
1003 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
1004 | (char *) &srec_frame, | |
1005 | "\ | |
1006 | Set the number of bytes in an S-record frame.\n\ | |
1007 | This affects the communication protocol with the remote target.", | |
1008 | &setlist), | |
1009 | &showlist); | |
1010 | #endif /* 0 */ | |
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\ | |
c5aa993b | 1037 | much slower, but generally more reliable.", |
c906108c SS |
1038 | &setlist), |
1039 | &showlist); | |
1040 | } |