Commit | Line | Data |
---|---|---|
c906108c SS |
1 | /* Remote debugging interface for Motorola's MVME187BUG monitor, an embedded |
2 | monitor for the m88k. | |
3 | ||
29e57380 | 4 | Copyright 1992, 1993, 2001 Free Software Foundation, Inc. |
c906108c SS |
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" | |
c906108c | 26 | #include "gdb_string.h" |
4e052eda | 27 | #include "regcache.h" |
c906108c SS |
28 | #include <ctype.h> |
29 | #include <fcntl.h> | |
c906108c SS |
30 | #include <setjmp.h> |
31 | #include <errno.h> | |
32 | ||
33 | #include "terminal.h" | |
34 | #include "gdbcore.h" | |
35 | #include "gdbcmd.h" | |
36 | ||
37 | #include "remote-utils.h" | |
38 | ||
39 | ||
c5aa993b | 40 | extern int sleep (); |
c906108c SS |
41 | |
42 | /* External data declarations */ | |
43 | extern int stop_soon_quietly; /* for wait_for_inferior */ | |
44 | ||
45 | /* Forward data declarations */ | |
46 | extern struct target_ops bug_ops; /* Forward declaration */ | |
47 | ||
48 | /* Forward function declarations */ | |
a14ed312 | 49 | static int bug_clear_breakpoints (void); |
c906108c | 50 | |
a14ed312 KB |
51 | static int bug_read_memory (CORE_ADDR memaddr, |
52 | unsigned char *myaddr, int len); | |
c906108c | 53 | |
a14ed312 KB |
54 | static int bug_write_memory (CORE_ADDR memaddr, |
55 | unsigned char *myaddr, int len); | |
c906108c SS |
56 | |
57 | /* This variable is somewhat arbitrary. It's here so that it can be | |
58 | set from within a running gdb. */ | |
59 | ||
60 | static int srec_max_retries = 3; | |
61 | ||
62 | /* Each S-record download to the target consists of an S0 header | |
63 | record, some number of S3 data records, and one S7 termination | |
64 | record. I call this download a "frame". Srec_frame says how many | |
65 | bytes will be represented in each frame. */ | |
66 | ||
67 | #define SREC_SIZE 160 | |
68 | static int srec_frame = SREC_SIZE; | |
69 | ||
70 | /* This variable determines how many bytes will be represented in each | |
71 | S3 s-record. */ | |
72 | ||
73 | static int srec_bytes = 40; | |
74 | ||
75 | /* At one point it appeared to me as though the bug monitor could not | |
76 | really be expected to receive two sequential characters at 9600 | |
77 | baud reliably. Echo-pacing is an attempt to force data across the | |
78 | line even in this condition. Specifically, in echo-pace mode, each | |
79 | character is sent one at a time and we look for the echo before | |
80 | sending the next. This is excruciatingly slow. */ | |
81 | ||
82 | static int srec_echo_pace = 0; | |
83 | ||
84 | /* How long to wait after an srec for a possible error message. | |
85 | Similar to the above, I tried sleeping after sending each S3 record | |
86 | in hopes that I might actually see error messages from the bug | |
87 | monitor. This might actually work if we were to use sleep | |
88 | intervals smaller than 1 second. */ | |
89 | ||
90 | static int srec_sleep = 0; | |
91 | ||
92 | /* Every srec_noise records, flub the checksum. This is a debugging | |
93 | feature. Set the variable to something other than 1 in order to | |
94 | inject *deliberate* checksum errors. One might do this if one | |
95 | wanted to test error handling and recovery. */ | |
96 | ||
97 | static int srec_noise = 0; | |
98 | ||
99 | /* Called when SIGALRM signal sent due to alarm() timeout. */ | |
100 | ||
101 | /* Number of SIGTRAPs we need to simulate. That is, the next | |
102 | NEED_ARTIFICIAL_TRAP calls to bug_wait should just return | |
103 | SIGTRAP without actually waiting for anything. */ | |
104 | ||
105 | static int need_artificial_trap = 0; | |
106 | ||
107 | /* | |
108 | * Download a file specified in 'args', to the bug. | |
109 | */ | |
110 | ||
111 | static void | |
fba45db2 | 112 | bug_load (char *args, int fromtty) |
c906108c SS |
113 | { |
114 | bfd *abfd; | |
115 | asection *s; | |
116 | char buffer[1024]; | |
117 | ||
118 | sr_check_open (); | |
119 | ||
c906108c SS |
120 | inferior_pid = 0; |
121 | abfd = bfd_openr (args, 0); | |
122 | if (!abfd) | |
123 | { | |
124 | printf_filtered ("Unable to open file %s\n", args); | |
125 | return; | |
126 | } | |
127 | ||
128 | if (bfd_check_format (abfd, bfd_object) == 0) | |
129 | { | |
130 | printf_filtered ("File is not an object file\n"); | |
131 | return; | |
132 | } | |
133 | ||
134 | s = abfd->sections; | |
135 | while (s != (asection *) NULL) | |
136 | { | |
137 | srec_frame = SREC_SIZE; | |
138 | if (s->flags & SEC_LOAD) | |
139 | { | |
140 | int i; | |
141 | ||
142 | char *buffer = xmalloc (srec_frame); | |
143 | ||
144 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size); | |
145 | gdb_flush (gdb_stdout); | |
146 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
147 | { | |
148 | if (srec_frame > s->_raw_size - i) | |
149 | srec_frame = s->_raw_size - i; | |
150 | ||
151 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); | |
152 | bug_write_memory (s->vma + i, buffer, srec_frame); | |
153 | printf_filtered ("*"); | |
154 | gdb_flush (gdb_stdout); | |
155 | } | |
156 | printf_filtered ("\n"); | |
b8c9b27d | 157 | xfree (buffer); |
c906108c SS |
158 | } |
159 | s = s->next; | |
160 | } | |
161 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); | |
162 | sr_write_cr (buffer); | |
163 | gr_expect_prompt (); | |
164 | } | |
165 | ||
166 | #if 0 | |
167 | static char * | |
fba45db2 | 168 | get_word (char **p) |
c906108c SS |
169 | { |
170 | char *s = *p; | |
171 | char *word; | |
172 | char *copy; | |
173 | size_t len; | |
174 | ||
175 | while (isspace (*s)) | |
176 | s++; | |
177 | ||
178 | word = s; | |
179 | ||
180 | len = 0; | |
181 | ||
182 | while (*s && !isspace (*s)) | |
183 | { | |
184 | s++; | |
185 | len++; | |
186 | ||
187 | } | |
188 | copy = xmalloc (len + 1); | |
189 | memcpy (copy, word, len); | |
190 | copy[len] = 0; | |
191 | *p = s; | |
192 | return copy; | |
193 | } | |
194 | #endif | |
195 | ||
c5aa993b JM |
196 | static struct gr_settings bug_settings = |
197 | { | |
c5aa993b JM |
198 | "Bug>", /* prompt */ |
199 | &bug_ops, /* ops */ | |
200 | bug_clear_breakpoints, /* clear_all_breakpoints */ | |
c5aa993b | 201 | gr_generic_checkin, /* checkin */ |
c906108c SS |
202 | }; |
203 | ||
c5aa993b JM |
204 | static char *cpu_check_strings[] = |
205 | { | |
c906108c SS |
206 | "=", |
207 | "Invalid Register", | |
208 | }; | |
209 | ||
210 | static void | |
fba45db2 | 211 | bug_open (char *args, int from_tty) |
c906108c SS |
212 | { |
213 | if (args == NULL) | |
c5aa993b | 214 | args = ""; |
c906108c | 215 | |
c5aa993b | 216 | gr_open (args, from_tty, &bug_settings); |
c906108c | 217 | /* decide *now* whether we are on an 88100 or an 88110 */ |
c5aa993b JM |
218 | sr_write_cr ("rs cr06"); |
219 | sr_expect ("rs cr06"); | |
c906108c | 220 | |
c5aa993b | 221 | switch (gr_multi_scan (cpu_check_strings, 0)) |
c906108c | 222 | { |
c5aa993b | 223 | case 0: /* this is an m88100 */ |
c906108c SS |
224 | target_is_m88110 = 0; |
225 | break; | |
c5aa993b | 226 | case 1: /* this is an m88110 */ |
c906108c SS |
227 | target_is_m88110 = 1; |
228 | break; | |
229 | default: | |
e1e9e218 | 230 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c SS |
231 | } |
232 | } | |
233 | ||
234 | /* Tell the remote machine to resume. */ | |
235 | ||
236 | void | |
fba45db2 | 237 | bug_resume (int pid, int step, enum target_signal sig) |
c906108c | 238 | { |
c906108c SS |
239 | if (step) |
240 | { | |
c5aa993b | 241 | sr_write_cr ("t"); |
c906108c SS |
242 | |
243 | /* Force the next bug_wait to return a trap. Not doing anything | |
c5aa993b JM |
244 | about I/O from the target means that the user has to type |
245 | "continue" to see any. FIXME, this should be fixed. */ | |
c906108c SS |
246 | need_artificial_trap = 1; |
247 | } | |
248 | else | |
c5aa993b | 249 | sr_write_cr ("g"); |
c906108c SS |
250 | |
251 | return; | |
252 | } | |
253 | ||
254 | /* Wait until the remote machine stops, then return, | |
255 | storing status in STATUS just as `wait' would. */ | |
256 | ||
c5aa993b JM |
257 | static char *wait_strings[] = |
258 | { | |
c906108c SS |
259 | "At Breakpoint", |
260 | "Exception: Data Access Fault (Local Bus Timeout)", | |
c5aa993b | 261 | "\r8??\?-Bug>", /* The '\?' avoids creating a trigraph */ |
c906108c SS |
262 | "\r197-Bug>", |
263 | NULL, | |
264 | }; | |
265 | ||
266 | int | |
fba45db2 | 267 | bug_wait (int pid, struct target_waitstatus *status) |
c906108c | 268 | { |
c5aa993b | 269 | int old_timeout = sr_get_timeout (); |
c906108c SS |
270 | int old_immediate_quit = immediate_quit; |
271 | ||
272 | status->kind = TARGET_WAITKIND_EXITED; | |
273 | status->value.integer = 0; | |
274 | ||
275 | /* read off leftovers from resume so that the rest can be passed | |
276 | back out as stdout. */ | |
277 | if (need_artificial_trap == 0) | |
278 | { | |
c5aa993b JM |
279 | sr_expect ("Effective address: "); |
280 | (void) sr_get_hex_word (); | |
c906108c SS |
281 | sr_expect ("\r\n"); |
282 | } | |
283 | ||
c5aa993b JM |
284 | sr_set_timeout (-1); /* Don't time out -- user program is running. */ |
285 | immediate_quit = 1; /* Helps ability to QUIT */ | |
c906108c | 286 | |
c5aa993b | 287 | switch (gr_multi_scan (wait_strings, need_artificial_trap == 0)) |
c906108c | 288 | { |
c5aa993b | 289 | case 0: /* breakpoint case */ |
c906108c SS |
290 | status->kind = TARGET_WAITKIND_STOPPED; |
291 | status->value.sig = TARGET_SIGNAL_TRAP; | |
292 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 293 | gr_expect_prompt (); |
c906108c SS |
294 | break; |
295 | ||
c5aa993b | 296 | case 1: /* bus error */ |
c906108c SS |
297 | status->kind = TARGET_WAITKIND_STOPPED; |
298 | status->value.sig = TARGET_SIGNAL_BUS; | |
299 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 300 | gr_expect_prompt (); |
c906108c SS |
301 | break; |
302 | ||
c5aa993b | 303 | case 2: /* normal case */ |
c906108c SS |
304 | case 3: |
305 | if (need_artificial_trap != 0) | |
306 | { | |
307 | /* stepping */ | |
308 | status->kind = TARGET_WAITKIND_STOPPED; | |
309 | status->value.sig = TARGET_SIGNAL_TRAP; | |
310 | need_artificial_trap--; | |
311 | break; | |
312 | } | |
313 | else | |
314 | { | |
315 | /* exit case */ | |
316 | status->kind = TARGET_WAITKIND_EXITED; | |
317 | status->value.integer = 0; | |
318 | break; | |
319 | } | |
320 | ||
c5aa993b | 321 | case -1: /* trouble */ |
c906108c SS |
322 | default: |
323 | fprintf_filtered (gdb_stderr, | |
324 | "Trouble reading target during wait\n"); | |
325 | break; | |
326 | } | |
327 | ||
c5aa993b | 328 | sr_set_timeout (old_timeout); |
c906108c SS |
329 | immediate_quit = old_immediate_quit; |
330 | return 0; | |
331 | } | |
332 | ||
333 | /* Return the name of register number REGNO | |
334 | in the form input and output by bug. | |
335 | ||
336 | Returns a pointer to a static buffer containing the answer. */ | |
337 | static char * | |
fba45db2 | 338 | get_reg_name (int regno) |
c906108c | 339 | { |
c5aa993b JM |
340 | static char *rn[] = |
341 | { | |
c906108c SS |
342 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", |
343 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
344 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
345 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
346 | ||
c5aa993b | 347 | /* these get confusing because we omit a few and switch some ordering around. */ |
c906108c | 348 | |
c5aa993b JM |
349 | "cr01", /* 32 = psr */ |
350 | "fcr62", /* 33 = fpsr */ | |
351 | "fcr63", /* 34 = fpcr */ | |
c906108c SS |
352 | "ip", /* this is something of a cheat. */ |
353 | /* 35 = sxip */ | |
c5aa993b JM |
354 | "cr05", /* 36 = snip */ |
355 | "cr06", /* 37 = sfip */ | |
c906108c SS |
356 | |
357 | "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07", | |
358 | "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15", | |
359 | "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", | |
360 | "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", | |
361 | }; | |
362 | ||
363 | return rn[regno]; | |
364 | } | |
365 | ||
c5aa993b | 366 | #if 0 /* not currently used */ |
c906108c SS |
367 | /* Read from remote while the input matches STRING. Return zero on |
368 | success, -1 on failure. */ | |
369 | ||
370 | static int | |
fba45db2 | 371 | bug_scan (char *s) |
c906108c SS |
372 | { |
373 | int c; | |
374 | ||
375 | while (*s) | |
376 | { | |
c5aa993b | 377 | c = sr_readchar (); |
c906108c SS |
378 | if (c != *s++) |
379 | { | |
c5aa993b JM |
380 | fflush (stdout); |
381 | printf ("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
382 | return (-1); | |
c906108c SS |
383 | } |
384 | } | |
385 | ||
c5aa993b | 386 | return (0); |
c906108c SS |
387 | } |
388 | #endif /* never */ | |
389 | ||
390 | static int | |
fba45db2 | 391 | bug_srec_write_cr (char *s) |
c906108c SS |
392 | { |
393 | char *p = s; | |
394 | ||
395 | if (srec_echo_pace) | |
396 | for (p = s; *p; ++p) | |
397 | { | |
c5aa993b | 398 | if (sr_get_debug () > 0) |
c906108c SS |
399 | printf ("%c", *p); |
400 | ||
401 | do | |
c5aa993b JM |
402 | SERIAL_WRITE (sr_get_desc (), p, 1); |
403 | while (sr_pollchar () != *p); | |
c906108c SS |
404 | } |
405 | else | |
c5aa993b | 406 | { |
c906108c SS |
407 | sr_write_cr (s); |
408 | /* return(bug_scan (s) || bug_scan ("\n")); */ | |
409 | } | |
410 | ||
c5aa993b | 411 | return (0); |
c906108c SS |
412 | } |
413 | ||
414 | /* Store register REGNO, or all if REGNO == -1. */ | |
415 | ||
416 | static void | |
fba45db2 | 417 | bug_fetch_register (int regno) |
c906108c | 418 | { |
c5aa993b | 419 | sr_check_open (); |
c906108c SS |
420 | |
421 | if (regno == -1) | |
422 | { | |
423 | int i; | |
424 | ||
425 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 426 | bug_fetch_register (i); |
c906108c SS |
427 | } |
428 | else if (target_is_m88110 && regno == SFIP_REGNUM) | |
429 | { | |
430 | /* m88110 has no sfip. */ | |
431 | long l = 0; | |
c5aa993b | 432 | supply_register (regno, (char *) &l); |
c906108c SS |
433 | } |
434 | else if (regno < XFP_REGNUM) | |
435 | { | |
436 | char buffer[MAX_REGISTER_RAW_SIZE]; | |
437 | ||
438 | sr_write ("rs ", 3); | |
c5aa993b | 439 | sr_write_cr (get_reg_name (regno)); |
c906108c SS |
440 | sr_expect ("="); |
441 | store_unsigned_integer (buffer, REGISTER_RAW_SIZE (regno), | |
c5aa993b | 442 | sr_get_hex_word ()); |
c906108c SS |
443 | gr_expect_prompt (); |
444 | supply_register (regno, buffer); | |
445 | } | |
446 | else | |
447 | { | |
448 | /* Float register so we need to parse a strange data format. */ | |
449 | long p; | |
450 | unsigned char fpreg_buf[10]; | |
451 | ||
c5aa993b JM |
452 | sr_write ("rs ", 3); |
453 | sr_write (get_reg_name (regno), strlen (get_reg_name (regno))); | |
454 | sr_write_cr (";d"); | |
455 | sr_expect ("rs"); | |
456 | sr_expect (get_reg_name (regno)); | |
457 | sr_expect (";d"); | |
458 | sr_expect ("="); | |
c906108c SS |
459 | |
460 | /* sign */ | |
c5aa993b | 461 | p = sr_get_hex_digit (1); |
c906108c SS |
462 | fpreg_buf[0] = p << 7; |
463 | ||
464 | /* exponent */ | |
c5aa993b JM |
465 | sr_expect ("_"); |
466 | p = sr_get_hex_digit (1); | |
c906108c | 467 | fpreg_buf[0] += (p << 4); |
c5aa993b | 468 | fpreg_buf[0] += sr_get_hex_digit (1); |
c906108c | 469 | |
c5aa993b | 470 | fpreg_buf[1] = sr_get_hex_digit (1) << 4; |
c906108c SS |
471 | |
472 | /* fraction */ | |
c5aa993b JM |
473 | sr_expect ("_"); |
474 | fpreg_buf[1] += sr_get_hex_digit (1); | |
475 | ||
476 | fpreg_buf[2] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
477 | fpreg_buf[3] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
478 | fpreg_buf[4] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
479 | fpreg_buf[5] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
480 | fpreg_buf[6] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
481 | fpreg_buf[7] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
c906108c SS |
482 | fpreg_buf[8] = 0; |
483 | fpreg_buf[9] = 0; | |
484 | ||
c5aa993b JM |
485 | gr_expect_prompt (); |
486 | supply_register (regno, fpreg_buf); | |
c906108c SS |
487 | } |
488 | ||
489 | return; | |
490 | } | |
491 | ||
492 | /* Store register REGNO, or all if REGNO == -1. */ | |
493 | ||
494 | static void | |
fba45db2 | 495 | bug_store_register (int regno) |
c906108c SS |
496 | { |
497 | char buffer[1024]; | |
c5aa993b | 498 | sr_check_open (); |
c906108c SS |
499 | |
500 | if (regno == -1) | |
501 | { | |
502 | int i; | |
503 | ||
504 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 505 | bug_store_register (i); |
c906108c SS |
506 | } |
507 | else | |
508 | { | |
509 | char *regname; | |
510 | ||
c5aa993b | 511 | regname = get_reg_name (regno); |
c906108c SS |
512 | |
513 | if (target_is_m88110 && regno == SFIP_REGNUM) | |
514 | return; | |
515 | else if (regno < XFP_REGNUM) | |
c5aa993b JM |
516 | sprintf (buffer, "rs %s %08x", |
517 | regname, | |
518 | read_register (regno)); | |
c906108c SS |
519 | else |
520 | { | |
521 | unsigned char *fpreg_buf = | |
c5aa993b JM |
522 | (unsigned char *) ®isters[REGISTER_BYTE (regno)]; |
523 | ||
524 | sprintf (buffer, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d", | |
525 | regname, | |
526 | /* sign */ | |
527 | (fpreg_buf[0] >> 7) & 0xf, | |
528 | /* exponent */ | |
529 | fpreg_buf[0] & 0x7f, | |
530 | (fpreg_buf[1] >> 8) & 0xf, | |
531 | /* fraction */ | |
532 | fpreg_buf[1] & 0xf, | |
533 | fpreg_buf[2], | |
534 | fpreg_buf[3], | |
535 | fpreg_buf[4], | |
536 | fpreg_buf[5], | |
537 | fpreg_buf[6], | |
538 | fpreg_buf[7]); | |
c906108c SS |
539 | } |
540 | ||
c5aa993b JM |
541 | sr_write_cr (buffer); |
542 | gr_expect_prompt (); | |
c906108c SS |
543 | } |
544 | ||
545 | return; | |
546 | } | |
547 | ||
69dc947a KB |
548 | /* Transfer LEN bytes between GDB address MYADDR and target address |
549 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
550 | otherwise transfer them from the target. TARGET is unused. | |
551 | ||
552 | Returns the number of bytes transferred. */ | |
553 | ||
c906108c | 554 | int |
69dc947a | 555 | bug_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
29e57380 C |
556 | struct mem_attrib *attrib ATTRIBUTE_UNUSED, |
557 | struct target_ops *target ATTRIBUTE_UNUSED) | |
c906108c | 558 | { |
4930751a C |
559 | int res; |
560 | ||
8c9cdfe8 C |
561 | if (len <= 0) |
562 | return 0; | |
c906108c | 563 | |
4930751a C |
564 | if (write) |
565 | res = bug_write_memory (memaddr, myaddr, len); | |
566 | else | |
567 | res = bug_read_memory (memaddr, myaddr, len); | |
568 | ||
569 | return res; | |
c906108c SS |
570 | } |
571 | ||
572 | static void | |
fba45db2 | 573 | start_load (void) |
c906108c SS |
574 | { |
575 | char *command; | |
576 | ||
577 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
578 | ||
579 | sr_write_cr (command); | |
580 | sr_expect (command); | |
581 | sr_expect ("\r\n"); | |
582 | bug_srec_write_cr ("S0030000FC"); | |
583 | return; | |
584 | } | |
585 | ||
586 | /* This is an extremely vulnerable and fragile function. I've made | |
587 | considerable attempts to make this deterministic, but I've | |
588 | certainly forgotten something. The trouble is that S-records are | |
589 | only a partial file format, not a protocol. Worse, apparently the | |
590 | m88k bug monitor does not run in real time while receiving | |
591 | S-records. Hence, we must pay excruciating attention to when and | |
592 | where error messages are returned, and what has actually been sent. | |
593 | ||
594 | Each call represents a chunk of memory to be sent to the target. | |
595 | We break that chunk into an S0 header record, some number of S3 | |
596 | data records each containing srec_bytes, and an S7 termination | |
597 | record. */ | |
598 | ||
c5aa993b JM |
599 | static char *srecord_strings[] = |
600 | { | |
c906108c SS |
601 | "S-RECORD", |
602 | "-Bug>", | |
603 | NULL, | |
604 | }; | |
605 | ||
606 | static int | |
fba45db2 | 607 | bug_write_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
c906108c SS |
608 | { |
609 | int done; | |
610 | int checksum; | |
611 | int x; | |
612 | int retries; | |
613 | char *buffer = alloca ((srec_bytes + 8) << 1); | |
614 | ||
615 | retries = 0; | |
616 | ||
617 | do | |
618 | { | |
619 | done = 0; | |
620 | ||
621 | if (retries > srec_max_retries) | |
c5aa993b | 622 | return (-1); |
c906108c SS |
623 | |
624 | if (retries > 0) | |
625 | { | |
c5aa993b JM |
626 | if (sr_get_debug () > 0) |
627 | printf ("\n<retrying...>\n"); | |
c906108c SS |
628 | |
629 | /* This gr_expect_prompt call is extremely important. Without | |
630 | it, we will tend to resend our packet so fast that it | |
631 | will arrive before the bug monitor is ready to receive | |
632 | it. This would lead to a very ugly resend loop. */ | |
633 | ||
c5aa993b | 634 | gr_expect_prompt (); |
c906108c SS |
635 | } |
636 | ||
c5aa993b | 637 | start_load (); |
c906108c SS |
638 | |
639 | while (done < len) | |
640 | { | |
641 | int thisgo; | |
642 | int idx; | |
643 | char *buf = buffer; | |
644 | CORE_ADDR address; | |
645 | ||
646 | checksum = 0; | |
647 | thisgo = len - done; | |
648 | if (thisgo > srec_bytes) | |
649 | thisgo = srec_bytes; | |
650 | ||
651 | address = memaddr + done; | |
652 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
653 | buf += 12; | |
654 | ||
655 | checksum += (thisgo + 4 + 1 | |
656 | + (address & 0xff) | |
c5aa993b | 657 | + ((address >> 8) & 0xff) |
c906108c SS |
658 | + ((address >> 16) & 0xff) |
659 | + ((address >> 24) & 0xff)); | |
660 | ||
661 | for (idx = 0; idx < thisgo; idx++) | |
662 | { | |
663 | sprintf (buf, "%02X", myaddr[idx + done]); | |
664 | checksum += myaddr[idx + done]; | |
665 | buf += 2; | |
666 | } | |
667 | ||
668 | if (srec_noise > 0) | |
669 | { | |
670 | /* FIXME-NOW: insert a deliberate error every now and then. | |
c5aa993b JM |
671 | This is intended for testing/debugging the error handling |
672 | stuff. */ | |
c906108c SS |
673 | static int counter = 0; |
674 | if (++counter > srec_noise) | |
675 | { | |
676 | counter = 0; | |
677 | ++checksum; | |
678 | } | |
679 | } | |
680 | ||
c5aa993b | 681 | sprintf (buf, "%02X", ~checksum & 0xff); |
c906108c SS |
682 | bug_srec_write_cr (buffer); |
683 | ||
684 | if (srec_sleep != 0) | |
c5aa993b | 685 | sleep (srec_sleep); |
c906108c SS |
686 | |
687 | /* This pollchar is probably redundant to the gr_multi_scan | |
688 | below. Trouble is, we can't be sure when or where an | |
689 | error message will appear. Apparently, when running at | |
690 | full speed from a typical sun4, error messages tend to | |
691 | appear to arrive only *after* the s7 record. */ | |
692 | ||
c5aa993b | 693 | if ((x = sr_pollchar ()) != 0) |
c906108c | 694 | { |
c5aa993b JM |
695 | if (sr_get_debug () > 0) |
696 | printf ("\n<retrying...>\n"); | |
c906108c SS |
697 | |
698 | ++retries; | |
699 | ||
700 | /* flush any remaining input and verify that we are back | |
c5aa993b JM |
701 | at the prompt level. */ |
702 | gr_expect_prompt (); | |
c906108c | 703 | /* start all over again. */ |
c5aa993b | 704 | start_load (); |
c906108c SS |
705 | done = 0; |
706 | continue; | |
707 | } | |
708 | ||
709 | done += thisgo; | |
710 | } | |
711 | ||
c5aa993b | 712 | bug_srec_write_cr ("S7060000000000F9"); |
c906108c SS |
713 | ++retries; |
714 | ||
715 | /* Having finished the load, we need to figure out whether we | |
c5aa993b JM |
716 | had any errors. */ |
717 | } | |
718 | while (gr_multi_scan (srecord_strings, 0) == 0);; | |
c906108c | 719 | |
c5aa993b | 720 | return (0); |
c906108c SS |
721 | } |
722 | ||
723 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
724 | to inferior's memory at MEMADDR. Returns errno value. | |
c5aa993b | 725 | * sb/sh instructions don't work on unaligned addresses, when TU=1. |
c906108c SS |
726 | */ |
727 | ||
728 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
729 | at debugger address MYADDR. Returns errno value. */ | |
730 | static int | |
fba45db2 | 731 | bug_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
c906108c SS |
732 | { |
733 | char request[100]; | |
734 | char *buffer; | |
735 | char *p; | |
736 | char type; | |
737 | char size; | |
738 | unsigned char c; | |
739 | unsigned int inaddr; | |
740 | unsigned int checksum; | |
741 | ||
c5aa993b JM |
742 | sprintf (request, "du 0 %x:&%d", memaddr, len); |
743 | sr_write_cr (request); | |
c906108c | 744 | |
c5aa993b | 745 | p = buffer = alloca (len); |
c906108c SS |
746 | |
747 | /* scan up through the header */ | |
c5aa993b | 748 | sr_expect ("S0030000FC"); |
c906108c SS |
749 | |
750 | while (p < buffer + len) | |
751 | { | |
752 | /* scan off any white space. */ | |
c5aa993b | 753 | while (sr_readchar () != 'S');; |
c906108c SS |
754 | |
755 | /* what kind of s-rec? */ | |
c5aa993b | 756 | type = sr_readchar (); |
c906108c SS |
757 | |
758 | /* scan record size */ | |
c5aa993b | 759 | sr_get_hex_byte (&size); |
c906108c SS |
760 | checksum = size; |
761 | --size; | |
762 | inaddr = 0; | |
763 | ||
764 | switch (type) | |
765 | { | |
766 | case '7': | |
767 | case '8': | |
768 | case '9': | |
769 | goto done; | |
770 | ||
771 | case '3': | |
c5aa993b | 772 | sr_get_hex_byte (&c); |
c906108c SS |
773 | inaddr = (inaddr << 8) + c; |
774 | checksum += c; | |
775 | --size; | |
776 | /* intentional fall through */ | |
777 | case '2': | |
c5aa993b | 778 | sr_get_hex_byte (&c); |
c906108c SS |
779 | inaddr = (inaddr << 8) + c; |
780 | checksum += c; | |
781 | --size; | |
782 | /* intentional fall through */ | |
783 | case '1': | |
c5aa993b | 784 | sr_get_hex_byte (&c); |
c906108c SS |
785 | inaddr = (inaddr << 8) + c; |
786 | checksum += c; | |
787 | --size; | |
c5aa993b | 788 | sr_get_hex_byte (&c); |
c906108c SS |
789 | inaddr = (inaddr << 8) + c; |
790 | checksum += c; | |
791 | --size; | |
792 | break; | |
793 | ||
794 | default: | |
795 | /* bonk */ | |
c5aa993b | 796 | error ("reading s-records."); |
c906108c SS |
797 | } |
798 | ||
799 | if (inaddr < memaddr | |
800 | || (memaddr + len) < (inaddr + size)) | |
c5aa993b | 801 | error ("srec out of memory range."); |
c906108c SS |
802 | |
803 | if (p != buffer + inaddr - memaddr) | |
c5aa993b | 804 | error ("srec out of sequence."); |
c906108c SS |
805 | |
806 | for (; size; --size, ++p) | |
807 | { | |
c5aa993b | 808 | sr_get_hex_byte (p); |
c906108c SS |
809 | checksum += *p; |
810 | } | |
811 | ||
c5aa993b | 812 | sr_get_hex_byte (&c); |
c906108c | 813 | if (c != (~checksum & 0xff)) |
c5aa993b | 814 | error ("bad s-rec checksum"); |
c906108c SS |
815 | } |
816 | ||
c5aa993b JM |
817 | done: |
818 | gr_expect_prompt (); | |
c906108c | 819 | if (p != buffer + len) |
c5aa993b | 820 | return (1); |
c906108c | 821 | |
c5aa993b JM |
822 | memcpy (myaddr, buffer, len); |
823 | return (0); | |
c906108c SS |
824 | } |
825 | ||
826 | #define MAX_BREAKS 16 | |
827 | static int num_brkpts = 0; | |
69dc947a KB |
828 | |
829 | /* Insert a breakpoint at ADDR. SAVE is normally the address of the | |
830 | pattern buffer where the instruction that the breakpoint overwrites | |
831 | is saved. It is unused here since the bug is responsible for | |
832 | saving/restoring the original instruction. */ | |
833 | ||
c906108c | 834 | static int |
69dc947a | 835 | bug_insert_breakpoint (CORE_ADDR addr, char *save) |
c906108c SS |
836 | { |
837 | sr_check_open (); | |
838 | ||
839 | if (num_brkpts < MAX_BREAKS) | |
840 | { | |
841 | char buffer[100]; | |
842 | ||
843 | num_brkpts++; | |
844 | sprintf (buffer, "br %x", addr); | |
845 | sr_write_cr (buffer); | |
846 | gr_expect_prompt (); | |
c5aa993b | 847 | return (0); |
c906108c SS |
848 | } |
849 | else | |
850 | { | |
851 | fprintf_filtered (gdb_stderr, | |
852 | "Too many break points, break point not installed\n"); | |
c5aa993b | 853 | return (1); |
c906108c SS |
854 | } |
855 | ||
856 | } | |
69dc947a KB |
857 | |
858 | /* Remove a breakpoint at ADDR. SAVE is normally the previously | |
859 | saved pattern, but is unused here since the bug is responsible | |
860 | for saving/restoring instructions. */ | |
861 | ||
c906108c | 862 | static int |
69dc947a | 863 | bug_remove_breakpoint (CORE_ADDR addr, char *save) |
c906108c SS |
864 | { |
865 | if (num_brkpts > 0) | |
866 | { | |
867 | char buffer[100]; | |
868 | ||
869 | num_brkpts--; | |
870 | sprintf (buffer, "nobr %x", addr); | |
871 | sr_write_cr (buffer); | |
872 | gr_expect_prompt (); | |
873 | ||
874 | } | |
875 | return (0); | |
876 | } | |
877 | ||
878 | /* Clear the bugs notion of what the break points are */ | |
879 | static int | |
fba45db2 | 880 | bug_clear_breakpoints (void) |
c906108c SS |
881 | { |
882 | ||
c5aa993b | 883 | if (sr_is_open ()) |
c906108c SS |
884 | { |
885 | sr_write_cr ("nobr"); | |
c5aa993b | 886 | sr_expect ("nobr"); |
c906108c SS |
887 | gr_expect_prompt (); |
888 | } | |
889 | num_brkpts = 0; | |
c5aa993b | 890 | return (0); |
c906108c SS |
891 | } |
892 | ||
c5aa993b | 893 | struct target_ops bug_ops; |
c906108c | 894 | |
c5aa993b JM |
895 | static void |
896 | init_bug_ops (void) | |
c906108c | 897 | { |
c5aa993b JM |
898 | bug_ops.to_shortname = "bug"; |
899 | "Remote BUG monitor", | |
900 | bug_ops.to_longname = "Use the mvme187 board running the BUG monitor connected by a serial line."; | |
901 | bug_ops.to_doc = " "; | |
902 | bug_ops.to_open = bug_open; | |
903 | bug_ops.to_close = gr_close; | |
904 | bug_ops.to_attach = 0; | |
c906108c SS |
905 | bug_ops.to_post_attach = NULL; |
906 | bug_ops.to_require_attach = NULL; | |
c5aa993b | 907 | bug_ops.to_detach = gr_detach; |
c906108c | 908 | bug_ops.to_require_detach = NULL; |
c5aa993b JM |
909 | bug_ops.to_resume = bug_resume; |
910 | bug_ops.to_wait = bug_wait; | |
c906108c | 911 | bug_ops.to_post_wait = NULL; |
c5aa993b JM |
912 | bug_ops.to_fetch_registers = bug_fetch_register; |
913 | bug_ops.to_store_registers = bug_store_register; | |
914 | bug_ops.to_prepare_to_store = gr_prepare_to_store; | |
915 | bug_ops.to_xfer_memory = bug_xfer_memory; | |
916 | bug_ops.to_files_info = gr_files_info; | |
917 | bug_ops.to_insert_breakpoint = bug_insert_breakpoint; | |
918 | bug_ops.to_remove_breakpoint = bug_remove_breakpoint; | |
919 | bug_ops.to_terminal_init = 0; | |
920 | bug_ops.to_terminal_inferior = 0; | |
921 | bug_ops.to_terminal_ours_for_output = 0; | |
922 | bug_ops.to_terminal_ours = 0; | |
923 | bug_ops.to_terminal_info = 0; | |
924 | bug_ops.to_kill = gr_kill; | |
925 | bug_ops.to_load = bug_load; | |
926 | bug_ops.to_lookup_symbol = 0; | |
927 | bug_ops.to_create_inferior = gr_create_inferior; | |
c906108c SS |
928 | bug_ops.to_post_startup_inferior = NULL; |
929 | bug_ops.to_acknowledge_created_inferior = NULL; | |
c5aa993b JM |
930 | bug_ops.to_clone_and_follow_inferior = NULL; |
931 | bug_ops.to_post_follow_inferior_by_clone = NULL; | |
c906108c SS |
932 | bug_ops.to_insert_fork_catchpoint = NULL; |
933 | bug_ops.to_remove_fork_catchpoint = NULL; | |
934 | bug_ops.to_insert_vfork_catchpoint = NULL; | |
c5aa993b | 935 | bug_ops.to_remove_vfork_catchpoint = NULL; |
c906108c | 936 | bug_ops.to_has_forked = NULL; |
c5aa993b JM |
937 | bug_ops.to_has_vforked = NULL; |
938 | bug_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
c906108c SS |
939 | bug_ops.to_post_follow_vfork = NULL; |
940 | bug_ops.to_insert_exec_catchpoint = NULL; | |
941 | bug_ops.to_remove_exec_catchpoint = NULL; | |
942 | bug_ops.to_has_execd = NULL; | |
943 | bug_ops.to_reported_exec_events_per_exec_call = NULL; | |
944 | bug_ops.to_has_exited = NULL; | |
c5aa993b JM |
945 | bug_ops.to_mourn_inferior = gr_mourn; |
946 | bug_ops.to_can_run = 0; | |
947 | bug_ops.to_notice_signals = 0; | |
948 | bug_ops.to_thread_alive = 0; | |
949 | bug_ops.to_stop = 0; | |
c906108c SS |
950 | bug_ops.to_pid_to_exec_file = NULL; |
951 | bug_ops.to_core_file_to_sym_file = NULL; | |
c5aa993b JM |
952 | bug_ops.to_stratum = process_stratum; |
953 | bug_ops.DONT_USE = 0; | |
954 | bug_ops.to_has_all_memory = 1; | |
955 | bug_ops.to_has_memory = 1; | |
956 | bug_ops.to_has_stack = 1; | |
957 | bug_ops.to_has_registers = 0; | |
958 | bug_ops.to_has_execution = 0; | |
959 | bug_ops.to_sections = 0; | |
960 | bug_ops.to_sections_end = 0; | |
961 | bug_ops.to_magic = OPS_MAGIC; /* Always the last thing */ | |
962 | } /* init_bug_ops */ | |
c906108c SS |
963 | |
964 | void | |
fba45db2 | 965 | _initialize_remote_bug (void) |
c906108c | 966 | { |
c5aa993b | 967 | init_bug_ops (); |
c906108c SS |
968 | add_target (&bug_ops); |
969 | ||
970 | add_show_from_set | |
971 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
972 | (char *) &srec_bytes, | |
973 | "\ | |
974 | Set the number of bytes represented in each S-record.\n\ | |
975 | This affects the communication protocol with the remote target.", | |
976 | &setlist), | |
977 | &showlist); | |
978 | ||
979 | add_show_from_set | |
980 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
981 | (char *) &srec_max_retries, | |
982 | "\ | |
983 | Set the number of retries for shipping S-records.\n\ | |
984 | This affects the communication protocol with the remote target.", | |
985 | &setlist), | |
986 | &showlist); | |
987 | ||
988 | #if 0 | |
989 | /* This needs to set SREC_SIZE, not srec_frame which gets changed at the | |
990 | end of a download. But do we need the option at all? */ | |
991 | add_show_from_set | |
992 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
993 | (char *) &srec_frame, | |
994 | "\ | |
995 | Set the number of bytes in an S-record frame.\n\ | |
996 | This affects the communication protocol with the remote target.", | |
997 | &setlist), | |
998 | &showlist); | |
999 | #endif /* 0 */ | |
1000 | ||
1001 | add_show_from_set | |
1002 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1003 | (char *) &srec_noise, | |
1004 | "\ | |
1005 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1006 | Zero means flub none at all. This affects the communication protocol\n\ | |
1007 | with the remote target.", | |
1008 | &setlist), | |
1009 | &showlist); | |
1010 | ||
1011 | add_show_from_set | |
1012 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1013 | (char *) &srec_sleep, | |
1014 | "\ | |
1015 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1016 | This affects the communication protocol with the remote target.", | |
1017 | &setlist), | |
1018 | &showlist); | |
1019 | ||
1020 | add_show_from_set | |
1021 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1022 | (char *) &srec_echo_pace, | |
1023 | "\ | |
1024 | Set echo-verification.\n\ | |
1025 | When on, use verification by echo when downloading S-records. This is\n\ | |
c5aa993b | 1026 | much slower, but generally more reliable.", |
c906108c SS |
1027 | &setlist), |
1028 | &showlist); | |
1029 | } |