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" | |
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 | |
fba45db2 | 114 | bug_load (char *args, int fromtty) |
c906108c SS |
115 | { |
116 | bfd *abfd; | |
117 | asection *s; | |
118 | char buffer[1024]; | |
119 | ||
120 | sr_check_open (); | |
121 | ||
c906108c SS |
122 | inferior_pid = 0; |
123 | abfd = bfd_openr (args, 0); | |
124 | if (!abfd) | |
125 | { | |
126 | printf_filtered ("Unable to open file %s\n", args); | |
127 | return; | |
128 | } | |
129 | ||
130 | if (bfd_check_format (abfd, bfd_object) == 0) | |
131 | { | |
132 | printf_filtered ("File is not an object file\n"); | |
133 | return; | |
134 | } | |
135 | ||
136 | s = abfd->sections; | |
137 | while (s != (asection *) NULL) | |
138 | { | |
139 | srec_frame = SREC_SIZE; | |
140 | if (s->flags & SEC_LOAD) | |
141 | { | |
142 | int i; | |
143 | ||
144 | char *buffer = xmalloc (srec_frame); | |
145 | ||
146 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size); | |
147 | gdb_flush (gdb_stdout); | |
148 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
149 | { | |
150 | if (srec_frame > s->_raw_size - i) | |
151 | srec_frame = s->_raw_size - i; | |
152 | ||
153 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); | |
154 | bug_write_memory (s->vma + i, buffer, srec_frame); | |
155 | printf_filtered ("*"); | |
156 | gdb_flush (gdb_stdout); | |
157 | } | |
158 | printf_filtered ("\n"); | |
b8c9b27d | 159 | xfree (buffer); |
c906108c SS |
160 | } |
161 | s = s->next; | |
162 | } | |
163 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); | |
164 | sr_write_cr (buffer); | |
165 | gr_expect_prompt (); | |
166 | } | |
167 | ||
168 | #if 0 | |
169 | static char * | |
fba45db2 | 170 | get_word (char **p) |
c906108c SS |
171 | { |
172 | char *s = *p; | |
173 | char *word; | |
174 | char *copy; | |
175 | size_t len; | |
176 | ||
177 | while (isspace (*s)) | |
178 | s++; | |
179 | ||
180 | word = s; | |
181 | ||
182 | len = 0; | |
183 | ||
184 | while (*s && !isspace (*s)) | |
185 | { | |
186 | s++; | |
187 | len++; | |
188 | ||
189 | } | |
190 | copy = xmalloc (len + 1); | |
191 | memcpy (copy, word, len); | |
192 | copy[len] = 0; | |
193 | *p = s; | |
194 | return copy; | |
195 | } | |
196 | #endif | |
197 | ||
c5aa993b JM |
198 | static struct gr_settings bug_settings = |
199 | { | |
c5aa993b JM |
200 | "Bug>", /* prompt */ |
201 | &bug_ops, /* ops */ | |
202 | bug_clear_breakpoints, /* clear_all_breakpoints */ | |
c5aa993b | 203 | gr_generic_checkin, /* checkin */ |
c906108c SS |
204 | }; |
205 | ||
c5aa993b JM |
206 | static char *cpu_check_strings[] = |
207 | { | |
c906108c SS |
208 | "=", |
209 | "Invalid Register", | |
210 | }; | |
211 | ||
212 | static void | |
fba45db2 | 213 | bug_open (char *args, int from_tty) |
c906108c SS |
214 | { |
215 | if (args == NULL) | |
c5aa993b | 216 | args = ""; |
c906108c | 217 | |
c5aa993b | 218 | gr_open (args, from_tty, &bug_settings); |
c906108c | 219 | /* decide *now* whether we are on an 88100 or an 88110 */ |
c5aa993b JM |
220 | sr_write_cr ("rs cr06"); |
221 | sr_expect ("rs cr06"); | |
c906108c | 222 | |
c5aa993b | 223 | switch (gr_multi_scan (cpu_check_strings, 0)) |
c906108c | 224 | { |
c5aa993b | 225 | case 0: /* this is an m88100 */ |
c906108c SS |
226 | target_is_m88110 = 0; |
227 | break; | |
c5aa993b | 228 | case 1: /* this is an m88110 */ |
c906108c SS |
229 | target_is_m88110 = 1; |
230 | break; | |
231 | default: | |
c5aa993b | 232 | abort (); |
c906108c SS |
233 | } |
234 | } | |
235 | ||
236 | /* Tell the remote machine to resume. */ | |
237 | ||
238 | void | |
fba45db2 | 239 | bug_resume (int pid, int step, enum target_signal sig) |
c906108c | 240 | { |
c906108c SS |
241 | if (step) |
242 | { | |
c5aa993b | 243 | sr_write_cr ("t"); |
c906108c SS |
244 | |
245 | /* Force the next bug_wait to return a trap. Not doing anything | |
c5aa993b JM |
246 | about I/O from the target means that the user has to type |
247 | "continue" to see any. FIXME, this should be fixed. */ | |
c906108c SS |
248 | need_artificial_trap = 1; |
249 | } | |
250 | else | |
c5aa993b | 251 | sr_write_cr ("g"); |
c906108c SS |
252 | |
253 | return; | |
254 | } | |
255 | ||
256 | /* Wait until the remote machine stops, then return, | |
257 | storing status in STATUS just as `wait' would. */ | |
258 | ||
c5aa993b JM |
259 | static char *wait_strings[] = |
260 | { | |
c906108c SS |
261 | "At Breakpoint", |
262 | "Exception: Data Access Fault (Local Bus Timeout)", | |
c5aa993b | 263 | "\r8??\?-Bug>", /* The '\?' avoids creating a trigraph */ |
c906108c SS |
264 | "\r197-Bug>", |
265 | NULL, | |
266 | }; | |
267 | ||
268 | int | |
fba45db2 | 269 | bug_wait (int pid, struct target_waitstatus *status) |
c906108c | 270 | { |
c5aa993b | 271 | int old_timeout = sr_get_timeout (); |
c906108c SS |
272 | int old_immediate_quit = immediate_quit; |
273 | ||
274 | status->kind = TARGET_WAITKIND_EXITED; | |
275 | status->value.integer = 0; | |
276 | ||
277 | /* read off leftovers from resume so that the rest can be passed | |
278 | back out as stdout. */ | |
279 | if (need_artificial_trap == 0) | |
280 | { | |
c5aa993b JM |
281 | sr_expect ("Effective address: "); |
282 | (void) sr_get_hex_word (); | |
c906108c SS |
283 | sr_expect ("\r\n"); |
284 | } | |
285 | ||
c5aa993b JM |
286 | sr_set_timeout (-1); /* Don't time out -- user program is running. */ |
287 | immediate_quit = 1; /* Helps ability to QUIT */ | |
c906108c | 288 | |
c5aa993b | 289 | switch (gr_multi_scan (wait_strings, need_artificial_trap == 0)) |
c906108c | 290 | { |
c5aa993b | 291 | case 0: /* breakpoint case */ |
c906108c SS |
292 | status->kind = TARGET_WAITKIND_STOPPED; |
293 | status->value.sig = TARGET_SIGNAL_TRAP; | |
294 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 295 | gr_expect_prompt (); |
c906108c SS |
296 | break; |
297 | ||
c5aa993b | 298 | case 1: /* bus error */ |
c906108c SS |
299 | status->kind = TARGET_WAITKIND_STOPPED; |
300 | status->value.sig = TARGET_SIGNAL_BUS; | |
301 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 302 | gr_expect_prompt (); |
c906108c SS |
303 | break; |
304 | ||
c5aa993b | 305 | case 2: /* normal case */ |
c906108c SS |
306 | case 3: |
307 | if (need_artificial_trap != 0) | |
308 | { | |
309 | /* stepping */ | |
310 | status->kind = TARGET_WAITKIND_STOPPED; | |
311 | status->value.sig = TARGET_SIGNAL_TRAP; | |
312 | need_artificial_trap--; | |
313 | break; | |
314 | } | |
315 | else | |
316 | { | |
317 | /* exit case */ | |
318 | status->kind = TARGET_WAITKIND_EXITED; | |
319 | status->value.integer = 0; | |
320 | break; | |
321 | } | |
322 | ||
c5aa993b | 323 | case -1: /* trouble */ |
c906108c SS |
324 | default: |
325 | fprintf_filtered (gdb_stderr, | |
326 | "Trouble reading target during wait\n"); | |
327 | break; | |
328 | } | |
329 | ||
c5aa993b | 330 | sr_set_timeout (old_timeout); |
c906108c SS |
331 | immediate_quit = old_immediate_quit; |
332 | return 0; | |
333 | } | |
334 | ||
335 | /* Return the name of register number REGNO | |
336 | in the form input and output by bug. | |
337 | ||
338 | Returns a pointer to a static buffer containing the answer. */ | |
339 | static char * | |
fba45db2 | 340 | get_reg_name (int regno) |
c906108c | 341 | { |
c5aa993b JM |
342 | static char *rn[] = |
343 | { | |
c906108c SS |
344 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", |
345 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
346 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
347 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
348 | ||
c5aa993b | 349 | /* these get confusing because we omit a few and switch some ordering around. */ |
c906108c | 350 | |
c5aa993b JM |
351 | "cr01", /* 32 = psr */ |
352 | "fcr62", /* 33 = fpsr */ | |
353 | "fcr63", /* 34 = fpcr */ | |
c906108c SS |
354 | "ip", /* this is something of a cheat. */ |
355 | /* 35 = sxip */ | |
c5aa993b JM |
356 | "cr05", /* 36 = snip */ |
357 | "cr06", /* 37 = sfip */ | |
c906108c SS |
358 | |
359 | "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07", | |
360 | "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15", | |
361 | "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", | |
362 | "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", | |
363 | }; | |
364 | ||
365 | return rn[regno]; | |
366 | } | |
367 | ||
c5aa993b | 368 | #if 0 /* not currently used */ |
c906108c SS |
369 | /* Read from remote while the input matches STRING. Return zero on |
370 | success, -1 on failure. */ | |
371 | ||
372 | static int | |
fba45db2 | 373 | bug_scan (char *s) |
c906108c SS |
374 | { |
375 | int c; | |
376 | ||
377 | while (*s) | |
378 | { | |
c5aa993b | 379 | c = sr_readchar (); |
c906108c SS |
380 | if (c != *s++) |
381 | { | |
c5aa993b JM |
382 | fflush (stdout); |
383 | printf ("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
384 | return (-1); | |
c906108c SS |
385 | } |
386 | } | |
387 | ||
c5aa993b | 388 | return (0); |
c906108c SS |
389 | } |
390 | #endif /* never */ | |
391 | ||
392 | static int | |
fba45db2 | 393 | bug_srec_write_cr (char *s) |
c906108c SS |
394 | { |
395 | char *p = s; | |
396 | ||
397 | if (srec_echo_pace) | |
398 | for (p = s; *p; ++p) | |
399 | { | |
c5aa993b | 400 | if (sr_get_debug () > 0) |
c906108c SS |
401 | printf ("%c", *p); |
402 | ||
403 | do | |
c5aa993b JM |
404 | SERIAL_WRITE (sr_get_desc (), p, 1); |
405 | while (sr_pollchar () != *p); | |
c906108c SS |
406 | } |
407 | else | |
c5aa993b | 408 | { |
c906108c SS |
409 | sr_write_cr (s); |
410 | /* return(bug_scan (s) || bug_scan ("\n")); */ | |
411 | } | |
412 | ||
c5aa993b | 413 | return (0); |
c906108c SS |
414 | } |
415 | ||
416 | /* Store register REGNO, or all if REGNO == -1. */ | |
417 | ||
418 | static void | |
fba45db2 | 419 | bug_fetch_register (int regno) |
c906108c | 420 | { |
c5aa993b | 421 | sr_check_open (); |
c906108c SS |
422 | |
423 | if (regno == -1) | |
424 | { | |
425 | int i; | |
426 | ||
427 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 428 | bug_fetch_register (i); |
c906108c SS |
429 | } |
430 | else if (target_is_m88110 && regno == SFIP_REGNUM) | |
431 | { | |
432 | /* m88110 has no sfip. */ | |
433 | long l = 0; | |
c5aa993b | 434 | supply_register (regno, (char *) &l); |
c906108c SS |
435 | } |
436 | else if (regno < XFP_REGNUM) | |
437 | { | |
438 | char buffer[MAX_REGISTER_RAW_SIZE]; | |
439 | ||
440 | sr_write ("rs ", 3); | |
c5aa993b | 441 | sr_write_cr (get_reg_name (regno)); |
c906108c SS |
442 | sr_expect ("="); |
443 | store_unsigned_integer (buffer, REGISTER_RAW_SIZE (regno), | |
c5aa993b | 444 | sr_get_hex_word ()); |
c906108c SS |
445 | gr_expect_prompt (); |
446 | supply_register (regno, buffer); | |
447 | } | |
448 | else | |
449 | { | |
450 | /* Float register so we need to parse a strange data format. */ | |
451 | long p; | |
452 | unsigned char fpreg_buf[10]; | |
453 | ||
c5aa993b JM |
454 | sr_write ("rs ", 3); |
455 | sr_write (get_reg_name (regno), strlen (get_reg_name (regno))); | |
456 | sr_write_cr (";d"); | |
457 | sr_expect ("rs"); | |
458 | sr_expect (get_reg_name (regno)); | |
459 | sr_expect (";d"); | |
460 | sr_expect ("="); | |
c906108c SS |
461 | |
462 | /* sign */ | |
c5aa993b | 463 | p = sr_get_hex_digit (1); |
c906108c SS |
464 | fpreg_buf[0] = p << 7; |
465 | ||
466 | /* exponent */ | |
c5aa993b JM |
467 | sr_expect ("_"); |
468 | p = sr_get_hex_digit (1); | |
c906108c | 469 | fpreg_buf[0] += (p << 4); |
c5aa993b | 470 | fpreg_buf[0] += sr_get_hex_digit (1); |
c906108c | 471 | |
c5aa993b | 472 | fpreg_buf[1] = sr_get_hex_digit (1) << 4; |
c906108c SS |
473 | |
474 | /* fraction */ | |
c5aa993b JM |
475 | sr_expect ("_"); |
476 | fpreg_buf[1] += sr_get_hex_digit (1); | |
477 | ||
478 | fpreg_buf[2] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
479 | fpreg_buf[3] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
480 | fpreg_buf[4] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
481 | fpreg_buf[5] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
482 | fpreg_buf[6] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
483 | fpreg_buf[7] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
c906108c SS |
484 | fpreg_buf[8] = 0; |
485 | fpreg_buf[9] = 0; | |
486 | ||
c5aa993b JM |
487 | gr_expect_prompt (); |
488 | supply_register (regno, fpreg_buf); | |
c906108c SS |
489 | } |
490 | ||
491 | return; | |
492 | } | |
493 | ||
494 | /* Store register REGNO, or all if REGNO == -1. */ | |
495 | ||
496 | static void | |
fba45db2 | 497 | bug_store_register (int regno) |
c906108c SS |
498 | { |
499 | char buffer[1024]; | |
c5aa993b | 500 | sr_check_open (); |
c906108c SS |
501 | |
502 | if (regno == -1) | |
503 | { | |
504 | int i; | |
505 | ||
506 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 507 | bug_store_register (i); |
c906108c SS |
508 | } |
509 | else | |
510 | { | |
511 | char *regname; | |
512 | ||
c5aa993b | 513 | regname = get_reg_name (regno); |
c906108c SS |
514 | |
515 | if (target_is_m88110 && regno == SFIP_REGNUM) | |
516 | return; | |
517 | else if (regno < XFP_REGNUM) | |
c5aa993b JM |
518 | sprintf (buffer, "rs %s %08x", |
519 | regname, | |
520 | read_register (regno)); | |
c906108c SS |
521 | else |
522 | { | |
523 | unsigned char *fpreg_buf = | |
c5aa993b JM |
524 | (unsigned char *) ®isters[REGISTER_BYTE (regno)]; |
525 | ||
526 | sprintf (buffer, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d", | |
527 | regname, | |
528 | /* sign */ | |
529 | (fpreg_buf[0] >> 7) & 0xf, | |
530 | /* exponent */ | |
531 | fpreg_buf[0] & 0x7f, | |
532 | (fpreg_buf[1] >> 8) & 0xf, | |
533 | /* fraction */ | |
534 | fpreg_buf[1] & 0xf, | |
535 | fpreg_buf[2], | |
536 | fpreg_buf[3], | |
537 | fpreg_buf[4], | |
538 | fpreg_buf[5], | |
539 | fpreg_buf[6], | |
540 | fpreg_buf[7]); | |
c906108c SS |
541 | } |
542 | ||
c5aa993b JM |
543 | sr_write_cr (buffer); |
544 | gr_expect_prompt (); | |
c906108c SS |
545 | } |
546 | ||
547 | return; | |
548 | } | |
549 | ||
69dc947a KB |
550 | /* Transfer LEN bytes between GDB address MYADDR and target address |
551 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
552 | otherwise transfer them from the target. TARGET is unused. | |
553 | ||
554 | Returns the number of bytes transferred. */ | |
555 | ||
c906108c | 556 | int |
69dc947a | 557 | bug_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
29e57380 C |
558 | struct mem_attrib *attrib ATTRIBUTE_UNUSED, |
559 | struct target_ops *target ATTRIBUTE_UNUSED) | |
c906108c | 560 | { |
4930751a C |
561 | int res; |
562 | ||
8c9cdfe8 C |
563 | if (len <= 0) |
564 | return 0; | |
c906108c | 565 | |
4930751a C |
566 | if (write) |
567 | res = bug_write_memory (memaddr, myaddr, len); | |
568 | else | |
569 | res = bug_read_memory (memaddr, myaddr, len); | |
570 | ||
571 | return res; | |
c906108c SS |
572 | } |
573 | ||
574 | static void | |
fba45db2 | 575 | start_load (void) |
c906108c SS |
576 | { |
577 | char *command; | |
578 | ||
579 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
580 | ||
581 | sr_write_cr (command); | |
582 | sr_expect (command); | |
583 | sr_expect ("\r\n"); | |
584 | bug_srec_write_cr ("S0030000FC"); | |
585 | return; | |
586 | } | |
587 | ||
588 | /* This is an extremely vulnerable and fragile function. I've made | |
589 | considerable attempts to make this deterministic, but I've | |
590 | certainly forgotten something. The trouble is that S-records are | |
591 | only a partial file format, not a protocol. Worse, apparently the | |
592 | m88k bug monitor does not run in real time while receiving | |
593 | S-records. Hence, we must pay excruciating attention to when and | |
594 | where error messages are returned, and what has actually been sent. | |
595 | ||
596 | Each call represents a chunk of memory to be sent to the target. | |
597 | We break that chunk into an S0 header record, some number of S3 | |
598 | data records each containing srec_bytes, and an S7 termination | |
599 | record. */ | |
600 | ||
c5aa993b JM |
601 | static char *srecord_strings[] = |
602 | { | |
c906108c SS |
603 | "S-RECORD", |
604 | "-Bug>", | |
605 | NULL, | |
606 | }; | |
607 | ||
608 | static int | |
fba45db2 | 609 | bug_write_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
c906108c SS |
610 | { |
611 | int done; | |
612 | int checksum; | |
613 | int x; | |
614 | int retries; | |
615 | char *buffer = alloca ((srec_bytes + 8) << 1); | |
616 | ||
617 | retries = 0; | |
618 | ||
619 | do | |
620 | { | |
621 | done = 0; | |
622 | ||
623 | if (retries > srec_max_retries) | |
c5aa993b | 624 | return (-1); |
c906108c SS |
625 | |
626 | if (retries > 0) | |
627 | { | |
c5aa993b JM |
628 | if (sr_get_debug () > 0) |
629 | printf ("\n<retrying...>\n"); | |
c906108c SS |
630 | |
631 | /* This gr_expect_prompt call is extremely important. Without | |
632 | it, we will tend to resend our packet so fast that it | |
633 | will arrive before the bug monitor is ready to receive | |
634 | it. This would lead to a very ugly resend loop. */ | |
635 | ||
c5aa993b | 636 | gr_expect_prompt (); |
c906108c SS |
637 | } |
638 | ||
c5aa993b | 639 | start_load (); |
c906108c SS |
640 | |
641 | while (done < len) | |
642 | { | |
643 | int thisgo; | |
644 | int idx; | |
645 | char *buf = buffer; | |
646 | CORE_ADDR address; | |
647 | ||
648 | checksum = 0; | |
649 | thisgo = len - done; | |
650 | if (thisgo > srec_bytes) | |
651 | thisgo = srec_bytes; | |
652 | ||
653 | address = memaddr + done; | |
654 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
655 | buf += 12; | |
656 | ||
657 | checksum += (thisgo + 4 + 1 | |
658 | + (address & 0xff) | |
c5aa993b | 659 | + ((address >> 8) & 0xff) |
c906108c SS |
660 | + ((address >> 16) & 0xff) |
661 | + ((address >> 24) & 0xff)); | |
662 | ||
663 | for (idx = 0; idx < thisgo; idx++) | |
664 | { | |
665 | sprintf (buf, "%02X", myaddr[idx + done]); | |
666 | checksum += myaddr[idx + done]; | |
667 | buf += 2; | |
668 | } | |
669 | ||
670 | if (srec_noise > 0) | |
671 | { | |
672 | /* FIXME-NOW: insert a deliberate error every now and then. | |
c5aa993b JM |
673 | This is intended for testing/debugging the error handling |
674 | stuff. */ | |
c906108c SS |
675 | static int counter = 0; |
676 | if (++counter > srec_noise) | |
677 | { | |
678 | counter = 0; | |
679 | ++checksum; | |
680 | } | |
681 | } | |
682 | ||
c5aa993b | 683 | sprintf (buf, "%02X", ~checksum & 0xff); |
c906108c SS |
684 | bug_srec_write_cr (buffer); |
685 | ||
686 | if (srec_sleep != 0) | |
c5aa993b | 687 | sleep (srec_sleep); |
c906108c SS |
688 | |
689 | /* This pollchar is probably redundant to the gr_multi_scan | |
690 | below. Trouble is, we can't be sure when or where an | |
691 | error message will appear. Apparently, when running at | |
692 | full speed from a typical sun4, error messages tend to | |
693 | appear to arrive only *after* the s7 record. */ | |
694 | ||
c5aa993b | 695 | if ((x = sr_pollchar ()) != 0) |
c906108c | 696 | { |
c5aa993b JM |
697 | if (sr_get_debug () > 0) |
698 | printf ("\n<retrying...>\n"); | |
c906108c SS |
699 | |
700 | ++retries; | |
701 | ||
702 | /* flush any remaining input and verify that we are back | |
c5aa993b JM |
703 | at the prompt level. */ |
704 | gr_expect_prompt (); | |
c906108c | 705 | /* start all over again. */ |
c5aa993b | 706 | start_load (); |
c906108c SS |
707 | done = 0; |
708 | continue; | |
709 | } | |
710 | ||
711 | done += thisgo; | |
712 | } | |
713 | ||
c5aa993b | 714 | bug_srec_write_cr ("S7060000000000F9"); |
c906108c SS |
715 | ++retries; |
716 | ||
717 | /* Having finished the load, we need to figure out whether we | |
c5aa993b JM |
718 | had any errors. */ |
719 | } | |
720 | while (gr_multi_scan (srecord_strings, 0) == 0);; | |
c906108c | 721 | |
c5aa993b | 722 | return (0); |
c906108c SS |
723 | } |
724 | ||
725 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
726 | to inferior's memory at MEMADDR. Returns errno value. | |
c5aa993b | 727 | * sb/sh instructions don't work on unaligned addresses, when TU=1. |
c906108c SS |
728 | */ |
729 | ||
730 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
731 | at debugger address MYADDR. Returns errno value. */ | |
732 | static int | |
fba45db2 | 733 | bug_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
c906108c SS |
734 | { |
735 | char request[100]; | |
736 | char *buffer; | |
737 | char *p; | |
738 | char type; | |
739 | char size; | |
740 | unsigned char c; | |
741 | unsigned int inaddr; | |
742 | unsigned int checksum; | |
743 | ||
c5aa993b JM |
744 | sprintf (request, "du 0 %x:&%d", memaddr, len); |
745 | sr_write_cr (request); | |
c906108c | 746 | |
c5aa993b | 747 | p = buffer = alloca (len); |
c906108c SS |
748 | |
749 | /* scan up through the header */ | |
c5aa993b | 750 | sr_expect ("S0030000FC"); |
c906108c SS |
751 | |
752 | while (p < buffer + len) | |
753 | { | |
754 | /* scan off any white space. */ | |
c5aa993b | 755 | while (sr_readchar () != 'S');; |
c906108c SS |
756 | |
757 | /* what kind of s-rec? */ | |
c5aa993b | 758 | type = sr_readchar (); |
c906108c SS |
759 | |
760 | /* scan record size */ | |
c5aa993b | 761 | sr_get_hex_byte (&size); |
c906108c SS |
762 | checksum = size; |
763 | --size; | |
764 | inaddr = 0; | |
765 | ||
766 | switch (type) | |
767 | { | |
768 | case '7': | |
769 | case '8': | |
770 | case '9': | |
771 | goto done; | |
772 | ||
773 | case '3': | |
c5aa993b | 774 | sr_get_hex_byte (&c); |
c906108c SS |
775 | inaddr = (inaddr << 8) + c; |
776 | checksum += c; | |
777 | --size; | |
778 | /* intentional fall through */ | |
779 | case '2': | |
c5aa993b | 780 | sr_get_hex_byte (&c); |
c906108c SS |
781 | inaddr = (inaddr << 8) + c; |
782 | checksum += c; | |
783 | --size; | |
784 | /* intentional fall through */ | |
785 | case '1': | |
c5aa993b | 786 | sr_get_hex_byte (&c); |
c906108c SS |
787 | inaddr = (inaddr << 8) + c; |
788 | checksum += c; | |
789 | --size; | |
c5aa993b | 790 | sr_get_hex_byte (&c); |
c906108c SS |
791 | inaddr = (inaddr << 8) + c; |
792 | checksum += c; | |
793 | --size; | |
794 | break; | |
795 | ||
796 | default: | |
797 | /* bonk */ | |
c5aa993b | 798 | error ("reading s-records."); |
c906108c SS |
799 | } |
800 | ||
801 | if (inaddr < memaddr | |
802 | || (memaddr + len) < (inaddr + size)) | |
c5aa993b | 803 | error ("srec out of memory range."); |
c906108c SS |
804 | |
805 | if (p != buffer + inaddr - memaddr) | |
c5aa993b | 806 | error ("srec out of sequence."); |
c906108c SS |
807 | |
808 | for (; size; --size, ++p) | |
809 | { | |
c5aa993b | 810 | sr_get_hex_byte (p); |
c906108c SS |
811 | checksum += *p; |
812 | } | |
813 | ||
c5aa993b | 814 | sr_get_hex_byte (&c); |
c906108c | 815 | if (c != (~checksum & 0xff)) |
c5aa993b | 816 | error ("bad s-rec checksum"); |
c906108c SS |
817 | } |
818 | ||
c5aa993b JM |
819 | done: |
820 | gr_expect_prompt (); | |
c906108c | 821 | if (p != buffer + len) |
c5aa993b | 822 | return (1); |
c906108c | 823 | |
c5aa993b JM |
824 | memcpy (myaddr, buffer, len); |
825 | return (0); | |
c906108c SS |
826 | } |
827 | ||
828 | #define MAX_BREAKS 16 | |
829 | static int num_brkpts = 0; | |
69dc947a KB |
830 | |
831 | /* Insert a breakpoint at ADDR. SAVE is normally the address of the | |
832 | pattern buffer where the instruction that the breakpoint overwrites | |
833 | is saved. It is unused here since the bug is responsible for | |
834 | saving/restoring the original instruction. */ | |
835 | ||
c906108c | 836 | static int |
69dc947a | 837 | bug_insert_breakpoint (CORE_ADDR addr, char *save) |
c906108c SS |
838 | { |
839 | sr_check_open (); | |
840 | ||
841 | if (num_brkpts < MAX_BREAKS) | |
842 | { | |
843 | char buffer[100]; | |
844 | ||
845 | num_brkpts++; | |
846 | sprintf (buffer, "br %x", addr); | |
847 | sr_write_cr (buffer); | |
848 | gr_expect_prompt (); | |
c5aa993b | 849 | return (0); |
c906108c SS |
850 | } |
851 | else | |
852 | { | |
853 | fprintf_filtered (gdb_stderr, | |
854 | "Too many break points, break point not installed\n"); | |
c5aa993b | 855 | return (1); |
c906108c SS |
856 | } |
857 | ||
858 | } | |
69dc947a KB |
859 | |
860 | /* Remove a breakpoint at ADDR. SAVE is normally the previously | |
861 | saved pattern, but is unused here since the bug is responsible | |
862 | for saving/restoring instructions. */ | |
863 | ||
c906108c | 864 | static int |
69dc947a | 865 | bug_remove_breakpoint (CORE_ADDR addr, char *save) |
c906108c SS |
866 | { |
867 | if (num_brkpts > 0) | |
868 | { | |
869 | char buffer[100]; | |
870 | ||
871 | num_brkpts--; | |
872 | sprintf (buffer, "nobr %x", addr); | |
873 | sr_write_cr (buffer); | |
874 | gr_expect_prompt (); | |
875 | ||
876 | } | |
877 | return (0); | |
878 | } | |
879 | ||
880 | /* Clear the bugs notion of what the break points are */ | |
881 | static int | |
fba45db2 | 882 | bug_clear_breakpoints (void) |
c906108c SS |
883 | { |
884 | ||
c5aa993b | 885 | if (sr_is_open ()) |
c906108c SS |
886 | { |
887 | sr_write_cr ("nobr"); | |
c5aa993b | 888 | sr_expect ("nobr"); |
c906108c SS |
889 | gr_expect_prompt (); |
890 | } | |
891 | num_brkpts = 0; | |
c5aa993b | 892 | return (0); |
c906108c SS |
893 | } |
894 | ||
c5aa993b | 895 | struct target_ops bug_ops; |
c906108c | 896 | |
c5aa993b JM |
897 | static void |
898 | init_bug_ops (void) | |
c906108c | 899 | { |
c5aa993b JM |
900 | bug_ops.to_shortname = "bug"; |
901 | "Remote BUG monitor", | |
902 | bug_ops.to_longname = "Use the mvme187 board running the BUG monitor connected by a serial line."; | |
903 | bug_ops.to_doc = " "; | |
904 | bug_ops.to_open = bug_open; | |
905 | bug_ops.to_close = gr_close; | |
906 | bug_ops.to_attach = 0; | |
c906108c SS |
907 | bug_ops.to_post_attach = NULL; |
908 | bug_ops.to_require_attach = NULL; | |
c5aa993b | 909 | bug_ops.to_detach = gr_detach; |
c906108c | 910 | bug_ops.to_require_detach = NULL; |
c5aa993b JM |
911 | bug_ops.to_resume = bug_resume; |
912 | bug_ops.to_wait = bug_wait; | |
c906108c | 913 | bug_ops.to_post_wait = NULL; |
c5aa993b JM |
914 | bug_ops.to_fetch_registers = bug_fetch_register; |
915 | bug_ops.to_store_registers = bug_store_register; | |
916 | bug_ops.to_prepare_to_store = gr_prepare_to_store; | |
917 | bug_ops.to_xfer_memory = bug_xfer_memory; | |
918 | bug_ops.to_files_info = gr_files_info; | |
919 | bug_ops.to_insert_breakpoint = bug_insert_breakpoint; | |
920 | bug_ops.to_remove_breakpoint = bug_remove_breakpoint; | |
921 | bug_ops.to_terminal_init = 0; | |
922 | bug_ops.to_terminal_inferior = 0; | |
923 | bug_ops.to_terminal_ours_for_output = 0; | |
924 | bug_ops.to_terminal_ours = 0; | |
925 | bug_ops.to_terminal_info = 0; | |
926 | bug_ops.to_kill = gr_kill; | |
927 | bug_ops.to_load = bug_load; | |
928 | bug_ops.to_lookup_symbol = 0; | |
929 | bug_ops.to_create_inferior = gr_create_inferior; | |
c906108c SS |
930 | bug_ops.to_post_startup_inferior = NULL; |
931 | bug_ops.to_acknowledge_created_inferior = NULL; | |
c5aa993b JM |
932 | bug_ops.to_clone_and_follow_inferior = NULL; |
933 | bug_ops.to_post_follow_inferior_by_clone = NULL; | |
c906108c SS |
934 | bug_ops.to_insert_fork_catchpoint = NULL; |
935 | bug_ops.to_remove_fork_catchpoint = NULL; | |
936 | bug_ops.to_insert_vfork_catchpoint = NULL; | |
c5aa993b | 937 | bug_ops.to_remove_vfork_catchpoint = NULL; |
c906108c | 938 | bug_ops.to_has_forked = NULL; |
c5aa993b JM |
939 | bug_ops.to_has_vforked = NULL; |
940 | bug_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
c906108c SS |
941 | bug_ops.to_post_follow_vfork = NULL; |
942 | bug_ops.to_insert_exec_catchpoint = NULL; | |
943 | bug_ops.to_remove_exec_catchpoint = NULL; | |
944 | bug_ops.to_has_execd = NULL; | |
945 | bug_ops.to_reported_exec_events_per_exec_call = NULL; | |
946 | bug_ops.to_has_exited = NULL; | |
c5aa993b JM |
947 | bug_ops.to_mourn_inferior = gr_mourn; |
948 | bug_ops.to_can_run = 0; | |
949 | bug_ops.to_notice_signals = 0; | |
950 | bug_ops.to_thread_alive = 0; | |
951 | bug_ops.to_stop = 0; | |
c906108c SS |
952 | bug_ops.to_pid_to_exec_file = NULL; |
953 | bug_ops.to_core_file_to_sym_file = NULL; | |
c5aa993b JM |
954 | bug_ops.to_stratum = process_stratum; |
955 | bug_ops.DONT_USE = 0; | |
956 | bug_ops.to_has_all_memory = 1; | |
957 | bug_ops.to_has_memory = 1; | |
958 | bug_ops.to_has_stack = 1; | |
959 | bug_ops.to_has_registers = 0; | |
960 | bug_ops.to_has_execution = 0; | |
961 | bug_ops.to_sections = 0; | |
962 | bug_ops.to_sections_end = 0; | |
963 | bug_ops.to_magic = OPS_MAGIC; /* Always the last thing */ | |
964 | } /* init_bug_ops */ | |
c906108c SS |
965 | |
966 | void | |
fba45db2 | 967 | _initialize_remote_bug (void) |
c906108c | 968 | { |
c5aa993b | 969 | init_bug_ops (); |
c906108c SS |
970 | add_target (&bug_ops); |
971 | ||
972 | add_show_from_set | |
973 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
974 | (char *) &srec_bytes, | |
975 | "\ | |
976 | Set the number of bytes represented in each S-record.\n\ | |
977 | This affects the communication protocol with the remote target.", | |
978 | &setlist), | |
979 | &showlist); | |
980 | ||
981 | add_show_from_set | |
982 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
983 | (char *) &srec_max_retries, | |
984 | "\ | |
985 | Set the number of retries for shipping S-records.\n\ | |
986 | This affects the communication protocol with the remote target.", | |
987 | &setlist), | |
988 | &showlist); | |
989 | ||
990 | #if 0 | |
991 | /* This needs to set SREC_SIZE, not srec_frame which gets changed at the | |
992 | end of a download. But do we need the option at all? */ | |
993 | add_show_from_set | |
994 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
995 | (char *) &srec_frame, | |
996 | "\ | |
997 | Set the number of bytes in an S-record frame.\n\ | |
998 | This affects the communication protocol with the remote target.", | |
999 | &setlist), | |
1000 | &showlist); | |
1001 | #endif /* 0 */ | |
1002 | ||
1003 | add_show_from_set | |
1004 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1005 | (char *) &srec_noise, | |
1006 | "\ | |
1007 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1008 | Zero means flub none at all. This affects the communication protocol\n\ | |
1009 | with the remote target.", | |
1010 | &setlist), | |
1011 | &showlist); | |
1012 | ||
1013 | add_show_from_set | |
1014 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1015 | (char *) &srec_sleep, | |
1016 | "\ | |
1017 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1018 | This affects the communication protocol with the remote target.", | |
1019 | &setlist), | |
1020 | &showlist); | |
1021 | ||
1022 | add_show_from_set | |
1023 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1024 | (char *) &srec_echo_pace, | |
1025 | "\ | |
1026 | Set echo-verification.\n\ | |
1027 | When on, use verification by echo when downloading S-records. This is\n\ | |
c5aa993b | 1028 | much slower, but generally more reliable.", |
c906108c SS |
1029 | &setlist), |
1030 | &showlist); | |
1031 | } |