Commit | Line | Data |
---|---|---|
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 */ | |
c5aa993b | 51 | static int bug_clear_breakpoints PARAMS ((void)); |
c906108c | 52 | |
c5aa993b JM |
53 | static int bug_read_memory PARAMS ((CORE_ADDR memaddr, |
54 | unsigned char *myaddr, | |
55 | int len)); | |
c906108c | 56 | |
c5aa993b JM |
57 | static int bug_write_memory PARAMS ((CORE_ADDR memaddr, |
58 | unsigned char *myaddr, | |
59 | int len)); | |
c906108c SS |
60 | |
61 | /* This variable is somewhat arbitrary. It's here so that it can be | |
62 | set from within a running gdb. */ | |
63 | ||
64 | static int srec_max_retries = 3; | |
65 | ||
66 | /* Each S-record download to the target consists of an S0 header | |
67 | record, some number of S3 data records, and one S7 termination | |
68 | record. I call this download a "frame". Srec_frame says how many | |
69 | bytes will be represented in each frame. */ | |
70 | ||
71 | #define SREC_SIZE 160 | |
72 | static int srec_frame = SREC_SIZE; | |
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. */ | |
85 | ||
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; | |
102 | ||
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 | ||
111 | /* | |
112 | * Download a file specified in 'args', to the bug. | |
113 | */ | |
114 | ||
115 | static void | |
116 | bug_load (args, fromtty) | |
117 | char *args; | |
118 | int fromtty; | |
119 | { | |
120 | bfd *abfd; | |
121 | asection *s; | |
122 | char buffer[1024]; | |
123 | ||
124 | sr_check_open (); | |
125 | ||
c5aa993b | 126 | dcache_flush (gr_get_dcache ()); |
c906108c SS |
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 | srec_frame = SREC_SIZE; | |
145 | if (s->flags & SEC_LOAD) | |
146 | { | |
147 | int i; | |
148 | ||
149 | char *buffer = xmalloc (srec_frame); | |
150 | ||
151 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size); | |
152 | gdb_flush (gdb_stdout); | |
153 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
154 | { | |
155 | if (srec_frame > s->_raw_size - i) | |
156 | srec_frame = s->_raw_size - i; | |
157 | ||
158 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); | |
159 | bug_write_memory (s->vma + i, buffer, srec_frame); | |
160 | printf_filtered ("*"); | |
161 | gdb_flush (gdb_stdout); | |
162 | } | |
163 | printf_filtered ("\n"); | |
164 | free (buffer); | |
165 | } | |
166 | s = s->next; | |
167 | } | |
168 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); | |
169 | sr_write_cr (buffer); | |
170 | gr_expect_prompt (); | |
171 | } | |
172 | ||
173 | #if 0 | |
174 | static char * | |
175 | get_word (p) | |
176 | char **p; | |
177 | { | |
178 | char *s = *p; | |
179 | char *word; | |
180 | char *copy; | |
181 | size_t len; | |
182 | ||
183 | while (isspace (*s)) | |
184 | s++; | |
185 | ||
186 | word = s; | |
187 | ||
188 | len = 0; | |
189 | ||
190 | while (*s && !isspace (*s)) | |
191 | { | |
192 | s++; | |
193 | len++; | |
194 | ||
195 | } | |
196 | copy = xmalloc (len + 1); | |
197 | memcpy (copy, word, len); | |
198 | copy[len] = 0; | |
199 | *p = s; | |
200 | return copy; | |
201 | } | |
202 | #endif | |
203 | ||
c5aa993b JM |
204 | static struct gr_settings bug_settings = |
205 | { | |
206 | NULL, /* dcache */ | |
207 | "Bug>", /* prompt */ | |
208 | &bug_ops, /* ops */ | |
209 | bug_clear_breakpoints, /* clear_all_breakpoints */ | |
210 | bug_read_memory, /* readfunc */ | |
211 | bug_write_memory, /* writefunc */ | |
212 | gr_generic_checkin, /* checkin */ | |
c906108c SS |
213 | }; |
214 | ||
c5aa993b JM |
215 | static char *cpu_check_strings[] = |
216 | { | |
c906108c SS |
217 | "=", |
218 | "Invalid Register", | |
219 | }; | |
220 | ||
221 | static void | |
222 | bug_open (args, from_tty) | |
223 | char *args; | |
224 | int from_tty; | |
225 | { | |
226 | if (args == NULL) | |
c5aa993b | 227 | args = ""; |
c906108c | 228 | |
c5aa993b | 229 | gr_open (args, from_tty, &bug_settings); |
c906108c | 230 | /* decide *now* whether we are on an 88100 or an 88110 */ |
c5aa993b JM |
231 | sr_write_cr ("rs cr06"); |
232 | sr_expect ("rs cr06"); | |
c906108c | 233 | |
c5aa993b | 234 | switch (gr_multi_scan (cpu_check_strings, 0)) |
c906108c | 235 | { |
c5aa993b | 236 | case 0: /* this is an m88100 */ |
c906108c SS |
237 | target_is_m88110 = 0; |
238 | break; | |
c5aa993b | 239 | case 1: /* this is an m88110 */ |
c906108c SS |
240 | target_is_m88110 = 1; |
241 | break; | |
242 | default: | |
c5aa993b | 243 | abort (); |
c906108c SS |
244 | } |
245 | } | |
246 | ||
247 | /* Tell the remote machine to resume. */ | |
248 | ||
249 | void | |
250 | bug_resume (pid, step, sig) | |
251 | int pid, step; | |
252 | enum target_signal sig; | |
253 | { | |
c5aa993b | 254 | dcache_flush (gr_get_dcache ()); |
c906108c SS |
255 | |
256 | if (step) | |
257 | { | |
c5aa993b | 258 | sr_write_cr ("t"); |
c906108c SS |
259 | |
260 | /* Force the next bug_wait to return a trap. Not doing anything | |
c5aa993b JM |
261 | about I/O from the target means that the user has to type |
262 | "continue" to see any. FIXME, this should be fixed. */ | |
c906108c SS |
263 | need_artificial_trap = 1; |
264 | } | |
265 | else | |
c5aa993b | 266 | sr_write_cr ("g"); |
c906108c SS |
267 | |
268 | return; | |
269 | } | |
270 | ||
271 | /* Wait until the remote machine stops, then return, | |
272 | storing status in STATUS just as `wait' would. */ | |
273 | ||
c5aa993b JM |
274 | static char *wait_strings[] = |
275 | { | |
c906108c SS |
276 | "At Breakpoint", |
277 | "Exception: Data Access Fault (Local Bus Timeout)", | |
c5aa993b | 278 | "\r8??\?-Bug>", /* The '\?' avoids creating a trigraph */ |
c906108c SS |
279 | "\r197-Bug>", |
280 | NULL, | |
281 | }; | |
282 | ||
283 | int | |
284 | bug_wait (pid, status) | |
285 | int pid; | |
286 | struct target_waitstatus *status; | |
287 | { | |
c5aa993b | 288 | int old_timeout = sr_get_timeout (); |
c906108c SS |
289 | int old_immediate_quit = immediate_quit; |
290 | ||
291 | status->kind = TARGET_WAITKIND_EXITED; | |
292 | status->value.integer = 0; | |
293 | ||
294 | /* read off leftovers from resume so that the rest can be passed | |
295 | back out as stdout. */ | |
296 | if (need_artificial_trap == 0) | |
297 | { | |
c5aa993b JM |
298 | sr_expect ("Effective address: "); |
299 | (void) sr_get_hex_word (); | |
c906108c SS |
300 | sr_expect ("\r\n"); |
301 | } | |
302 | ||
c5aa993b JM |
303 | sr_set_timeout (-1); /* Don't time out -- user program is running. */ |
304 | immediate_quit = 1; /* Helps ability to QUIT */ | |
c906108c | 305 | |
c5aa993b | 306 | switch (gr_multi_scan (wait_strings, need_artificial_trap == 0)) |
c906108c | 307 | { |
c5aa993b | 308 | case 0: /* breakpoint case */ |
c906108c SS |
309 | status->kind = TARGET_WAITKIND_STOPPED; |
310 | status->value.sig = TARGET_SIGNAL_TRAP; | |
311 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 312 | gr_expect_prompt (); |
c906108c SS |
313 | break; |
314 | ||
c5aa993b | 315 | case 1: /* bus error */ |
c906108c SS |
316 | status->kind = TARGET_WAITKIND_STOPPED; |
317 | status->value.sig = TARGET_SIGNAL_BUS; | |
318 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 319 | gr_expect_prompt (); |
c906108c SS |
320 | break; |
321 | ||
c5aa993b | 322 | case 2: /* normal case */ |
c906108c SS |
323 | case 3: |
324 | if (need_artificial_trap != 0) | |
325 | { | |
326 | /* stepping */ | |
327 | status->kind = TARGET_WAITKIND_STOPPED; | |
328 | status->value.sig = TARGET_SIGNAL_TRAP; | |
329 | need_artificial_trap--; | |
330 | break; | |
331 | } | |
332 | else | |
333 | { | |
334 | /* exit case */ | |
335 | status->kind = TARGET_WAITKIND_EXITED; | |
336 | status->value.integer = 0; | |
337 | break; | |
338 | } | |
339 | ||
c5aa993b | 340 | case -1: /* trouble */ |
c906108c SS |
341 | default: |
342 | fprintf_filtered (gdb_stderr, | |
343 | "Trouble reading target during wait\n"); | |
344 | break; | |
345 | } | |
346 | ||
c5aa993b | 347 | sr_set_timeout (old_timeout); |
c906108c SS |
348 | immediate_quit = old_immediate_quit; |
349 | return 0; | |
350 | } | |
351 | ||
352 | /* Return the name of register number REGNO | |
353 | in the form input and output by bug. | |
354 | ||
355 | Returns a pointer to a static buffer containing the answer. */ | |
356 | static char * | |
357 | get_reg_name (regno) | |
358 | int regno; | |
359 | { | |
c5aa993b JM |
360 | static char *rn[] = |
361 | { | |
c906108c SS |
362 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", |
363 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
364 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
365 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
366 | ||
c5aa993b | 367 | /* these get confusing because we omit a few and switch some ordering around. */ |
c906108c | 368 | |
c5aa993b JM |
369 | "cr01", /* 32 = psr */ |
370 | "fcr62", /* 33 = fpsr */ | |
371 | "fcr63", /* 34 = fpcr */ | |
c906108c SS |
372 | "ip", /* this is something of a cheat. */ |
373 | /* 35 = sxip */ | |
c5aa993b JM |
374 | "cr05", /* 36 = snip */ |
375 | "cr06", /* 37 = sfip */ | |
c906108c SS |
376 | |
377 | "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07", | |
378 | "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15", | |
379 | "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", | |
380 | "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", | |
381 | }; | |
382 | ||
383 | return rn[regno]; | |
384 | } | |
385 | ||
c5aa993b | 386 | #if 0 /* not currently used */ |
c906108c SS |
387 | /* Read from remote while the input matches STRING. Return zero on |
388 | success, -1 on failure. */ | |
389 | ||
390 | static int | |
391 | bug_scan (s) | |
392 | char *s; | |
393 | { | |
394 | int c; | |
395 | ||
396 | while (*s) | |
397 | { | |
c5aa993b | 398 | c = sr_readchar (); |
c906108c SS |
399 | if (c != *s++) |
400 | { | |
c5aa993b JM |
401 | fflush (stdout); |
402 | printf ("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
403 | return (-1); | |
c906108c SS |
404 | } |
405 | } | |
406 | ||
c5aa993b | 407 | return (0); |
c906108c SS |
408 | } |
409 | #endif /* never */ | |
410 | ||
411 | static int | |
412 | bug_srec_write_cr (s) | |
413 | char *s; | |
414 | { | |
415 | char *p = s; | |
416 | ||
417 | if (srec_echo_pace) | |
418 | for (p = s; *p; ++p) | |
419 | { | |
c5aa993b | 420 | if (sr_get_debug () > 0) |
c906108c SS |
421 | printf ("%c", *p); |
422 | ||
423 | do | |
c5aa993b JM |
424 | SERIAL_WRITE (sr_get_desc (), p, 1); |
425 | while (sr_pollchar () != *p); | |
c906108c SS |
426 | } |
427 | else | |
c5aa993b | 428 | { |
c906108c SS |
429 | sr_write_cr (s); |
430 | /* return(bug_scan (s) || bug_scan ("\n")); */ | |
431 | } | |
432 | ||
c5aa993b | 433 | return (0); |
c906108c SS |
434 | } |
435 | ||
436 | /* Store register REGNO, or all if REGNO == -1. */ | |
437 | ||
438 | static void | |
c5aa993b | 439 | bug_fetch_register (regno) |
c906108c SS |
440 | int regno; |
441 | { | |
c5aa993b | 442 | sr_check_open (); |
c906108c SS |
443 | |
444 | if (regno == -1) | |
445 | { | |
446 | int i; | |
447 | ||
448 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 449 | bug_fetch_register (i); |
c906108c SS |
450 | } |
451 | else if (target_is_m88110 && regno == SFIP_REGNUM) | |
452 | { | |
453 | /* m88110 has no sfip. */ | |
454 | long l = 0; | |
c5aa993b | 455 | supply_register (regno, (char *) &l); |
c906108c SS |
456 | } |
457 | else if (regno < XFP_REGNUM) | |
458 | { | |
459 | char buffer[MAX_REGISTER_RAW_SIZE]; | |
460 | ||
461 | sr_write ("rs ", 3); | |
c5aa993b | 462 | sr_write_cr (get_reg_name (regno)); |
c906108c SS |
463 | sr_expect ("="); |
464 | store_unsigned_integer (buffer, REGISTER_RAW_SIZE (regno), | |
c5aa993b | 465 | sr_get_hex_word ()); |
c906108c SS |
466 | gr_expect_prompt (); |
467 | supply_register (regno, buffer); | |
468 | } | |
469 | else | |
470 | { | |
471 | /* Float register so we need to parse a strange data format. */ | |
472 | long p; | |
473 | unsigned char fpreg_buf[10]; | |
474 | ||
c5aa993b JM |
475 | sr_write ("rs ", 3); |
476 | sr_write (get_reg_name (regno), strlen (get_reg_name (regno))); | |
477 | sr_write_cr (";d"); | |
478 | sr_expect ("rs"); | |
479 | sr_expect (get_reg_name (regno)); | |
480 | sr_expect (";d"); | |
481 | sr_expect ("="); | |
c906108c SS |
482 | |
483 | /* sign */ | |
c5aa993b | 484 | p = sr_get_hex_digit (1); |
c906108c SS |
485 | fpreg_buf[0] = p << 7; |
486 | ||
487 | /* exponent */ | |
c5aa993b JM |
488 | sr_expect ("_"); |
489 | p = sr_get_hex_digit (1); | |
c906108c | 490 | fpreg_buf[0] += (p << 4); |
c5aa993b | 491 | fpreg_buf[0] += sr_get_hex_digit (1); |
c906108c | 492 | |
c5aa993b | 493 | fpreg_buf[1] = sr_get_hex_digit (1) << 4; |
c906108c SS |
494 | |
495 | /* fraction */ | |
c5aa993b JM |
496 | sr_expect ("_"); |
497 | fpreg_buf[1] += sr_get_hex_digit (1); | |
498 | ||
499 | fpreg_buf[2] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
500 | fpreg_buf[3] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
501 | fpreg_buf[4] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
502 | fpreg_buf[5] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
503 | fpreg_buf[6] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
504 | fpreg_buf[7] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
c906108c SS |
505 | fpreg_buf[8] = 0; |
506 | fpreg_buf[9] = 0; | |
507 | ||
c5aa993b JM |
508 | gr_expect_prompt (); |
509 | supply_register (regno, fpreg_buf); | |
c906108c SS |
510 | } |
511 | ||
512 | return; | |
513 | } | |
514 | ||
515 | /* Store register REGNO, or all if REGNO == -1. */ | |
516 | ||
517 | static void | |
518 | bug_store_register (regno) | |
519 | int regno; | |
520 | { | |
521 | char buffer[1024]; | |
c5aa993b | 522 | sr_check_open (); |
c906108c SS |
523 | |
524 | if (regno == -1) | |
525 | { | |
526 | int i; | |
527 | ||
528 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 529 | bug_store_register (i); |
c906108c SS |
530 | } |
531 | else | |
532 | { | |
533 | char *regname; | |
534 | ||
c5aa993b | 535 | regname = get_reg_name (regno); |
c906108c SS |
536 | |
537 | if (target_is_m88110 && regno == SFIP_REGNUM) | |
538 | return; | |
539 | else if (regno < XFP_REGNUM) | |
c5aa993b JM |
540 | sprintf (buffer, "rs %s %08x", |
541 | regname, | |
542 | read_register (regno)); | |
c906108c SS |
543 | else |
544 | { | |
545 | unsigned char *fpreg_buf = | |
c5aa993b JM |
546 | (unsigned char *) ®isters[REGISTER_BYTE (regno)]; |
547 | ||
548 | sprintf (buffer, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d", | |
549 | regname, | |
550 | /* sign */ | |
551 | (fpreg_buf[0] >> 7) & 0xf, | |
552 | /* exponent */ | |
553 | fpreg_buf[0] & 0x7f, | |
554 | (fpreg_buf[1] >> 8) & 0xf, | |
555 | /* fraction */ | |
556 | fpreg_buf[1] & 0xf, | |
557 | fpreg_buf[2], | |
558 | fpreg_buf[3], | |
559 | fpreg_buf[4], | |
560 | fpreg_buf[5], | |
561 | fpreg_buf[6], | |
562 | fpreg_buf[7]); | |
c906108c SS |
563 | } |
564 | ||
c5aa993b JM |
565 | sr_write_cr (buffer); |
566 | gr_expect_prompt (); | |
c906108c SS |
567 | } |
568 | ||
569 | return; | |
570 | } | |
571 | ||
572 | int | |
573 | bug_xfer_memory (memaddr, myaddr, len, write, target) | |
574 | CORE_ADDR memaddr; | |
575 | char *myaddr; | |
576 | int len; | |
577 | int write; | |
578 | struct target_ops *target; /* ignored */ | |
579 | { | |
580 | register int i; | |
581 | ||
582 | /* Round starting address down to longword boundary. */ | |
583 | register CORE_ADDR addr; | |
584 | ||
585 | /* Round ending address up; get number of longwords that makes. */ | |
586 | register int count; | |
587 | ||
588 | /* Allocate buffer of that many longwords. */ | |
589 | register int *buffer; | |
590 | ||
591 | addr = memaddr & -sizeof (int); | |
592 | count = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int); | |
593 | ||
594 | buffer = (int *) alloca (count * sizeof (int)); | |
595 | ||
596 | if (write) | |
597 | { | |
598 | /* Fill start and end extra bytes of buffer with existing memory data. */ | |
599 | ||
600 | if (addr != memaddr || len < (int) sizeof (int)) | |
601 | { | |
602 | /* Need part of initial word -- fetch it. */ | |
603 | buffer[0] = gr_fetch_word (addr); | |
604 | } | |
605 | ||
606 | if (count > 1) /* FIXME, avoid if even boundary */ | |
607 | { | |
608 | buffer[count - 1] | |
609 | = gr_fetch_word (addr + (count - 1) * sizeof (int)); | |
610 | } | |
611 | ||
612 | /* Copy data to be written over corresponding part of buffer */ | |
613 | ||
614 | memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len); | |
615 | ||
616 | /* Write the entire buffer. */ | |
617 | ||
618 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
619 | { | |
620 | errno = 0; | |
621 | gr_store_word (addr, buffer[i]); | |
622 | if (errno) | |
623 | { | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | } | |
629 | } | |
630 | else | |
631 | { | |
632 | /* Read all the longwords */ | |
633 | for (i = 0; i < count; i++, addr += sizeof (int)) | |
634 | { | |
635 | errno = 0; | |
636 | buffer[i] = gr_fetch_word (addr); | |
637 | if (errno) | |
638 | { | |
639 | return 0; | |
640 | } | |
641 | QUIT; | |
642 | } | |
643 | ||
644 | /* Copy appropriate bytes out of the buffer. */ | |
645 | memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len); | |
646 | } | |
647 | ||
648 | return len; | |
649 | } | |
650 | ||
651 | static void | |
c5aa993b | 652 | start_load () |
c906108c SS |
653 | { |
654 | char *command; | |
655 | ||
656 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
657 | ||
658 | sr_write_cr (command); | |
659 | sr_expect (command); | |
660 | sr_expect ("\r\n"); | |
661 | bug_srec_write_cr ("S0030000FC"); | |
662 | return; | |
663 | } | |
664 | ||
665 | /* This is an extremely vulnerable and fragile function. I've made | |
666 | considerable attempts to make this deterministic, but I've | |
667 | certainly forgotten something. The trouble is that S-records are | |
668 | only a partial file format, not a protocol. Worse, apparently the | |
669 | m88k bug monitor does not run in real time while receiving | |
670 | S-records. Hence, we must pay excruciating attention to when and | |
671 | where error messages are returned, and what has actually been sent. | |
672 | ||
673 | Each call represents a chunk of memory to be sent to the target. | |
674 | We break that chunk into an S0 header record, some number of S3 | |
675 | data records each containing srec_bytes, and an S7 termination | |
676 | record. */ | |
677 | ||
c5aa993b JM |
678 | static char *srecord_strings[] = |
679 | { | |
c906108c SS |
680 | "S-RECORD", |
681 | "-Bug>", | |
682 | NULL, | |
683 | }; | |
684 | ||
685 | static int | |
686 | bug_write_memory (memaddr, myaddr, len) | |
687 | CORE_ADDR memaddr; | |
688 | unsigned char *myaddr; | |
689 | int len; | |
690 | { | |
691 | int done; | |
692 | int checksum; | |
693 | int x; | |
694 | int retries; | |
695 | char *buffer = alloca ((srec_bytes + 8) << 1); | |
696 | ||
697 | retries = 0; | |
698 | ||
699 | do | |
700 | { | |
701 | done = 0; | |
702 | ||
703 | if (retries > srec_max_retries) | |
c5aa993b | 704 | return (-1); |
c906108c SS |
705 | |
706 | if (retries > 0) | |
707 | { | |
c5aa993b JM |
708 | if (sr_get_debug () > 0) |
709 | printf ("\n<retrying...>\n"); | |
c906108c SS |
710 | |
711 | /* This gr_expect_prompt call is extremely important. Without | |
712 | it, we will tend to resend our packet so fast that it | |
713 | will arrive before the bug monitor is ready to receive | |
714 | it. This would lead to a very ugly resend loop. */ | |
715 | ||
c5aa993b | 716 | gr_expect_prompt (); |
c906108c SS |
717 | } |
718 | ||
c5aa993b | 719 | start_load (); |
c906108c SS |
720 | |
721 | while (done < len) | |
722 | { | |
723 | int thisgo; | |
724 | int idx; | |
725 | char *buf = buffer; | |
726 | CORE_ADDR address; | |
727 | ||
728 | checksum = 0; | |
729 | thisgo = len - done; | |
730 | if (thisgo > srec_bytes) | |
731 | thisgo = srec_bytes; | |
732 | ||
733 | address = memaddr + done; | |
734 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
735 | buf += 12; | |
736 | ||
737 | checksum += (thisgo + 4 + 1 | |
738 | + (address & 0xff) | |
c5aa993b | 739 | + ((address >> 8) & 0xff) |
c906108c SS |
740 | + ((address >> 16) & 0xff) |
741 | + ((address >> 24) & 0xff)); | |
742 | ||
743 | for (idx = 0; idx < thisgo; idx++) | |
744 | { | |
745 | sprintf (buf, "%02X", myaddr[idx + done]); | |
746 | checksum += myaddr[idx + done]; | |
747 | buf += 2; | |
748 | } | |
749 | ||
750 | if (srec_noise > 0) | |
751 | { | |
752 | /* FIXME-NOW: insert a deliberate error every now and then. | |
c5aa993b JM |
753 | This is intended for testing/debugging the error handling |
754 | stuff. */ | |
c906108c SS |
755 | static int counter = 0; |
756 | if (++counter > srec_noise) | |
757 | { | |
758 | counter = 0; | |
759 | ++checksum; | |
760 | } | |
761 | } | |
762 | ||
c5aa993b | 763 | sprintf (buf, "%02X", ~checksum & 0xff); |
c906108c SS |
764 | bug_srec_write_cr (buffer); |
765 | ||
766 | if (srec_sleep != 0) | |
c5aa993b | 767 | sleep (srec_sleep); |
c906108c SS |
768 | |
769 | /* This pollchar is probably redundant to the gr_multi_scan | |
770 | below. Trouble is, we can't be sure when or where an | |
771 | error message will appear. Apparently, when running at | |
772 | full speed from a typical sun4, error messages tend to | |
773 | appear to arrive only *after* the s7 record. */ | |
774 | ||
c5aa993b | 775 | if ((x = sr_pollchar ()) != 0) |
c906108c | 776 | { |
c5aa993b JM |
777 | if (sr_get_debug () > 0) |
778 | printf ("\n<retrying...>\n"); | |
c906108c SS |
779 | |
780 | ++retries; | |
781 | ||
782 | /* flush any remaining input and verify that we are back | |
c5aa993b JM |
783 | at the prompt level. */ |
784 | gr_expect_prompt (); | |
c906108c | 785 | /* start all over again. */ |
c5aa993b | 786 | start_load (); |
c906108c SS |
787 | done = 0; |
788 | continue; | |
789 | } | |
790 | ||
791 | done += thisgo; | |
792 | } | |
793 | ||
c5aa993b | 794 | bug_srec_write_cr ("S7060000000000F9"); |
c906108c SS |
795 | ++retries; |
796 | ||
797 | /* Having finished the load, we need to figure out whether we | |
c5aa993b JM |
798 | had any errors. */ |
799 | } | |
800 | while (gr_multi_scan (srecord_strings, 0) == 0);; | |
c906108c | 801 | |
c5aa993b | 802 | return (0); |
c906108c SS |
803 | } |
804 | ||
805 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
806 | to inferior's memory at MEMADDR. Returns errno value. | |
c5aa993b | 807 | * sb/sh instructions don't work on unaligned addresses, when TU=1. |
c906108c SS |
808 | */ |
809 | ||
810 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
811 | at debugger address MYADDR. Returns errno value. */ | |
812 | static int | |
813 | bug_read_memory (memaddr, myaddr, len) | |
814 | CORE_ADDR memaddr; | |
815 | unsigned char *myaddr; | |
816 | int len; | |
817 | { | |
818 | char request[100]; | |
819 | char *buffer; | |
820 | char *p; | |
821 | char type; | |
822 | char size; | |
823 | unsigned char c; | |
824 | unsigned int inaddr; | |
825 | unsigned int checksum; | |
826 | ||
c5aa993b JM |
827 | sprintf (request, "du 0 %x:&%d", memaddr, len); |
828 | sr_write_cr (request); | |
c906108c | 829 | |
c5aa993b | 830 | p = buffer = alloca (len); |
c906108c SS |
831 | |
832 | /* scan up through the header */ | |
c5aa993b | 833 | sr_expect ("S0030000FC"); |
c906108c SS |
834 | |
835 | while (p < buffer + len) | |
836 | { | |
837 | /* scan off any white space. */ | |
c5aa993b | 838 | while (sr_readchar () != 'S');; |
c906108c SS |
839 | |
840 | /* what kind of s-rec? */ | |
c5aa993b | 841 | type = sr_readchar (); |
c906108c SS |
842 | |
843 | /* scan record size */ | |
c5aa993b | 844 | sr_get_hex_byte (&size); |
c906108c SS |
845 | checksum = size; |
846 | --size; | |
847 | inaddr = 0; | |
848 | ||
849 | switch (type) | |
850 | { | |
851 | case '7': | |
852 | case '8': | |
853 | case '9': | |
854 | goto done; | |
855 | ||
856 | case '3': | |
c5aa993b | 857 | sr_get_hex_byte (&c); |
c906108c SS |
858 | inaddr = (inaddr << 8) + c; |
859 | checksum += c; | |
860 | --size; | |
861 | /* intentional fall through */ | |
862 | case '2': | |
c5aa993b | 863 | sr_get_hex_byte (&c); |
c906108c SS |
864 | inaddr = (inaddr << 8) + c; |
865 | checksum += c; | |
866 | --size; | |
867 | /* intentional fall through */ | |
868 | case '1': | |
c5aa993b | 869 | sr_get_hex_byte (&c); |
c906108c SS |
870 | inaddr = (inaddr << 8) + c; |
871 | checksum += c; | |
872 | --size; | |
c5aa993b | 873 | sr_get_hex_byte (&c); |
c906108c SS |
874 | inaddr = (inaddr << 8) + c; |
875 | checksum += c; | |
876 | --size; | |
877 | break; | |
878 | ||
879 | default: | |
880 | /* bonk */ | |
c5aa993b | 881 | error ("reading s-records."); |
c906108c SS |
882 | } |
883 | ||
884 | if (inaddr < memaddr | |
885 | || (memaddr + len) < (inaddr + size)) | |
c5aa993b | 886 | error ("srec out of memory range."); |
c906108c SS |
887 | |
888 | if (p != buffer + inaddr - memaddr) | |
c5aa993b | 889 | error ("srec out of sequence."); |
c906108c SS |
890 | |
891 | for (; size; --size, ++p) | |
892 | { | |
c5aa993b | 893 | sr_get_hex_byte (p); |
c906108c SS |
894 | checksum += *p; |
895 | } | |
896 | ||
c5aa993b | 897 | sr_get_hex_byte (&c); |
c906108c | 898 | if (c != (~checksum & 0xff)) |
c5aa993b | 899 | error ("bad s-rec checksum"); |
c906108c SS |
900 | } |
901 | ||
c5aa993b JM |
902 | done: |
903 | gr_expect_prompt (); | |
c906108c | 904 | if (p != buffer + len) |
c5aa993b | 905 | return (1); |
c906108c | 906 | |
c5aa993b JM |
907 | memcpy (myaddr, buffer, len); |
908 | return (0); | |
c906108c SS |
909 | } |
910 | ||
911 | #define MAX_BREAKS 16 | |
912 | static int num_brkpts = 0; | |
913 | static int | |
914 | bug_insert_breakpoint (addr, save) | |
915 | CORE_ADDR addr; | |
916 | char *save; /* Throw away, let bug save instructions */ | |
917 | { | |
918 | sr_check_open (); | |
919 | ||
920 | if (num_brkpts < MAX_BREAKS) | |
921 | { | |
922 | char buffer[100]; | |
923 | ||
924 | num_brkpts++; | |
925 | sprintf (buffer, "br %x", addr); | |
926 | sr_write_cr (buffer); | |
927 | gr_expect_prompt (); | |
c5aa993b | 928 | return (0); |
c906108c SS |
929 | } |
930 | else | |
931 | { | |
932 | fprintf_filtered (gdb_stderr, | |
933 | "Too many break points, break point not installed\n"); | |
c5aa993b | 934 | return (1); |
c906108c SS |
935 | } |
936 | ||
937 | } | |
938 | static int | |
939 | bug_remove_breakpoint (addr, save) | |
940 | CORE_ADDR addr; | |
941 | char *save; /* Throw away, let bug save instructions */ | |
942 | { | |
943 | if (num_brkpts > 0) | |
944 | { | |
945 | char buffer[100]; | |
946 | ||
947 | num_brkpts--; | |
948 | sprintf (buffer, "nobr %x", addr); | |
949 | sr_write_cr (buffer); | |
950 | gr_expect_prompt (); | |
951 | ||
952 | } | |
953 | return (0); | |
954 | } | |
955 | ||
956 | /* Clear the bugs notion of what the break points are */ | |
957 | static int | |
958 | bug_clear_breakpoints () | |
959 | { | |
960 | ||
c5aa993b | 961 | if (sr_is_open ()) |
c906108c SS |
962 | { |
963 | sr_write_cr ("nobr"); | |
c5aa993b | 964 | sr_expect ("nobr"); |
c906108c SS |
965 | gr_expect_prompt (); |
966 | } | |
967 | num_brkpts = 0; | |
c5aa993b | 968 | return (0); |
c906108c SS |
969 | } |
970 | ||
c5aa993b | 971 | struct target_ops bug_ops; |
c906108c | 972 | |
c5aa993b JM |
973 | static void |
974 | init_bug_ops (void) | |
c906108c | 975 | { |
c5aa993b JM |
976 | bug_ops.to_shortname = "bug"; |
977 | "Remote BUG monitor", | |
978 | bug_ops.to_longname = "Use the mvme187 board running the BUG monitor connected by a serial line."; | |
979 | bug_ops.to_doc = " "; | |
980 | bug_ops.to_open = bug_open; | |
981 | bug_ops.to_close = gr_close; | |
982 | bug_ops.to_attach = 0; | |
c906108c SS |
983 | bug_ops.to_post_attach = NULL; |
984 | bug_ops.to_require_attach = NULL; | |
c5aa993b | 985 | bug_ops.to_detach = gr_detach; |
c906108c | 986 | bug_ops.to_require_detach = NULL; |
c5aa993b JM |
987 | bug_ops.to_resume = bug_resume; |
988 | bug_ops.to_wait = bug_wait; | |
c906108c | 989 | bug_ops.to_post_wait = NULL; |
c5aa993b JM |
990 | bug_ops.to_fetch_registers = bug_fetch_register; |
991 | bug_ops.to_store_registers = bug_store_register; | |
992 | bug_ops.to_prepare_to_store = gr_prepare_to_store; | |
993 | bug_ops.to_xfer_memory = bug_xfer_memory; | |
994 | bug_ops.to_files_info = gr_files_info; | |
995 | bug_ops.to_insert_breakpoint = bug_insert_breakpoint; | |
996 | bug_ops.to_remove_breakpoint = bug_remove_breakpoint; | |
997 | bug_ops.to_terminal_init = 0; | |
998 | bug_ops.to_terminal_inferior = 0; | |
999 | bug_ops.to_terminal_ours_for_output = 0; | |
1000 | bug_ops.to_terminal_ours = 0; | |
1001 | bug_ops.to_terminal_info = 0; | |
1002 | bug_ops.to_kill = gr_kill; | |
1003 | bug_ops.to_load = bug_load; | |
1004 | bug_ops.to_lookup_symbol = 0; | |
1005 | bug_ops.to_create_inferior = gr_create_inferior; | |
c906108c SS |
1006 | bug_ops.to_post_startup_inferior = NULL; |
1007 | bug_ops.to_acknowledge_created_inferior = NULL; | |
c5aa993b JM |
1008 | bug_ops.to_clone_and_follow_inferior = NULL; |
1009 | bug_ops.to_post_follow_inferior_by_clone = NULL; | |
c906108c SS |
1010 | bug_ops.to_insert_fork_catchpoint = NULL; |
1011 | bug_ops.to_remove_fork_catchpoint = NULL; | |
1012 | bug_ops.to_insert_vfork_catchpoint = NULL; | |
c5aa993b | 1013 | bug_ops.to_remove_vfork_catchpoint = NULL; |
c906108c | 1014 | bug_ops.to_has_forked = NULL; |
c5aa993b JM |
1015 | bug_ops.to_has_vforked = NULL; |
1016 | bug_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
c906108c SS |
1017 | bug_ops.to_post_follow_vfork = NULL; |
1018 | bug_ops.to_insert_exec_catchpoint = NULL; | |
1019 | bug_ops.to_remove_exec_catchpoint = NULL; | |
1020 | bug_ops.to_has_execd = NULL; | |
1021 | bug_ops.to_reported_exec_events_per_exec_call = NULL; | |
1022 | bug_ops.to_has_exited = NULL; | |
c5aa993b JM |
1023 | bug_ops.to_mourn_inferior = gr_mourn; |
1024 | bug_ops.to_can_run = 0; | |
1025 | bug_ops.to_notice_signals = 0; | |
1026 | bug_ops.to_thread_alive = 0; | |
1027 | bug_ops.to_stop = 0; | |
c906108c SS |
1028 | bug_ops.to_pid_to_exec_file = NULL; |
1029 | bug_ops.to_core_file_to_sym_file = NULL; | |
c5aa993b JM |
1030 | bug_ops.to_stratum = process_stratum; |
1031 | bug_ops.DONT_USE = 0; | |
1032 | bug_ops.to_has_all_memory = 1; | |
1033 | bug_ops.to_has_memory = 1; | |
1034 | bug_ops.to_has_stack = 1; | |
1035 | bug_ops.to_has_registers = 0; | |
1036 | bug_ops.to_has_execution = 0; | |
1037 | bug_ops.to_sections = 0; | |
1038 | bug_ops.to_sections_end = 0; | |
1039 | bug_ops.to_magic = OPS_MAGIC; /* Always the last thing */ | |
1040 | } /* init_bug_ops */ | |
c906108c SS |
1041 | |
1042 | void | |
1043 | _initialize_remote_bug () | |
1044 | { | |
c5aa993b | 1045 | init_bug_ops (); |
c906108c SS |
1046 | add_target (&bug_ops); |
1047 | ||
1048 | add_show_from_set | |
1049 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
1050 | (char *) &srec_bytes, | |
1051 | "\ | |
1052 | Set the number of bytes represented in each S-record.\n\ | |
1053 | This affects the communication protocol with the remote target.", | |
1054 | &setlist), | |
1055 | &showlist); | |
1056 | ||
1057 | add_show_from_set | |
1058 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
1059 | (char *) &srec_max_retries, | |
1060 | "\ | |
1061 | Set the number of retries for shipping S-records.\n\ | |
1062 | This affects the communication protocol with the remote target.", | |
1063 | &setlist), | |
1064 | &showlist); | |
1065 | ||
1066 | #if 0 | |
1067 | /* This needs to set SREC_SIZE, not srec_frame which gets changed at the | |
1068 | end of a download. But do we need the option at all? */ | |
1069 | add_show_from_set | |
1070 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
1071 | (char *) &srec_frame, | |
1072 | "\ | |
1073 | Set the number of bytes in an S-record frame.\n\ | |
1074 | This affects the communication protocol with the remote target.", | |
1075 | &setlist), | |
1076 | &showlist); | |
1077 | #endif /* 0 */ | |
1078 | ||
1079 | add_show_from_set | |
1080 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1081 | (char *) &srec_noise, | |
1082 | "\ | |
1083 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1084 | Zero means flub none at all. This affects the communication protocol\n\ | |
1085 | with the remote target.", | |
1086 | &setlist), | |
1087 | &showlist); | |
1088 | ||
1089 | add_show_from_set | |
1090 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1091 | (char *) &srec_sleep, | |
1092 | "\ | |
1093 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1094 | This affects the communication protocol with the remote target.", | |
1095 | &setlist), | |
1096 | &showlist); | |
1097 | ||
1098 | add_show_from_set | |
1099 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1100 | (char *) &srec_echo_pace, | |
1101 | "\ | |
1102 | Set echo-verification.\n\ | |
1103 | When on, use verification by echo when downloading S-records. This is\n\ | |
c5aa993b | 1104 | much slower, but generally more reliable.", |
c906108c SS |
1105 | &setlist), |
1106 | &showlist); | |
1107 | } |