Commit | Line | Data |
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c906108c SS |
1 | /* Remote debugging interface for Motorola's MVME187BUG monitor, an embedded |
2 | monitor for the m88k. | |
3 | ||
b6ba6518 KB |
4 | Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001 |
5 | Free Software Foundation, Inc. | |
c906108c SS |
6 | Contributed by Cygnus Support. Written by K. Richard Pixley. |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
24 | |
25 | #include "defs.h" | |
26 | #include "inferior.h" | |
c906108c | 27 | #include "gdb_string.h" |
4e052eda | 28 | #include "regcache.h" |
c906108c SS |
29 | #include <ctype.h> |
30 | #include <fcntl.h> | |
c906108c SS |
31 | #include <setjmp.h> |
32 | #include <errno.h> | |
33 | ||
34 | #include "terminal.h" | |
35 | #include "gdbcore.h" | |
36 | #include "gdbcmd.h" | |
37 | ||
38 | #include "remote-utils.h" | |
39 | ||
40 | ||
c5aa993b | 41 | extern int sleep (); |
c906108c SS |
42 | |
43 | /* External data declarations */ | |
44 | extern int stop_soon_quietly; /* for wait_for_inferior */ | |
45 | ||
46 | /* Forward data declarations */ | |
47 | extern struct target_ops bug_ops; /* Forward declaration */ | |
48 | ||
49 | /* Forward function declarations */ | |
a14ed312 | 50 | static int bug_clear_breakpoints (void); |
c906108c | 51 | |
a14ed312 KB |
52 | static int bug_read_memory (CORE_ADDR memaddr, |
53 | unsigned char *myaddr, int len); | |
c906108c | 54 | |
a14ed312 KB |
55 | static int bug_write_memory (CORE_ADDR memaddr, |
56 | unsigned char *myaddr, int len); | |
c906108c SS |
57 | |
58 | /* This variable is somewhat arbitrary. It's here so that it can be | |
59 | set from within a running gdb. */ | |
60 | ||
61 | static int srec_max_retries = 3; | |
62 | ||
63 | /* Each S-record download to the target consists of an S0 header | |
64 | record, some number of S3 data records, and one S7 termination | |
65 | record. I call this download a "frame". Srec_frame says how many | |
66 | bytes will be represented in each frame. */ | |
67 | ||
68 | #define SREC_SIZE 160 | |
69 | static int srec_frame = SREC_SIZE; | |
70 | ||
71 | /* This variable determines how many bytes will be represented in each | |
72 | S3 s-record. */ | |
73 | ||
74 | static int srec_bytes = 40; | |
75 | ||
76 | /* At one point it appeared to me as though the bug monitor could not | |
77 | really be expected to receive two sequential characters at 9600 | |
78 | baud reliably. Echo-pacing is an attempt to force data across the | |
79 | line even in this condition. Specifically, in echo-pace mode, each | |
80 | character is sent one at a time and we look for the echo before | |
81 | sending the next. This is excruciatingly slow. */ | |
82 | ||
83 | static int srec_echo_pace = 0; | |
84 | ||
85 | /* How long to wait after an srec for a possible error message. | |
86 | Similar to the above, I tried sleeping after sending each S3 record | |
87 | in hopes that I might actually see error messages from the bug | |
88 | monitor. This might actually work if we were to use sleep | |
89 | intervals smaller than 1 second. */ | |
90 | ||
91 | static int srec_sleep = 0; | |
92 | ||
93 | /* Every srec_noise records, flub the checksum. This is a debugging | |
94 | feature. Set the variable to something other than 1 in order to | |
95 | inject *deliberate* checksum errors. One might do this if one | |
96 | wanted to test error handling and recovery. */ | |
97 | ||
98 | static int srec_noise = 0; | |
99 | ||
100 | /* Called when SIGALRM signal sent due to alarm() timeout. */ | |
101 | ||
102 | /* Number of SIGTRAPs we need to simulate. That is, the next | |
103 | NEED_ARTIFICIAL_TRAP calls to bug_wait should just return | |
104 | SIGTRAP without actually waiting for anything. */ | |
105 | ||
106 | static int need_artificial_trap = 0; | |
107 | ||
108 | /* | |
109 | * Download a file specified in 'args', to the bug. | |
110 | */ | |
111 | ||
112 | static void | |
fba45db2 | 113 | bug_load (char *args, int fromtty) |
c906108c SS |
114 | { |
115 | bfd *abfd; | |
116 | asection *s; | |
117 | char buffer[1024]; | |
118 | ||
119 | sr_check_open (); | |
120 | ||
c906108c SS |
121 | inferior_pid = 0; |
122 | abfd = bfd_openr (args, 0); | |
123 | if (!abfd) | |
124 | { | |
125 | printf_filtered ("Unable to open file %s\n", args); | |
126 | return; | |
127 | } | |
128 | ||
129 | if (bfd_check_format (abfd, bfd_object) == 0) | |
130 | { | |
131 | printf_filtered ("File is not an object file\n"); | |
132 | return; | |
133 | } | |
134 | ||
135 | s = abfd->sections; | |
136 | while (s != (asection *) NULL) | |
137 | { | |
138 | srec_frame = SREC_SIZE; | |
139 | if (s->flags & SEC_LOAD) | |
140 | { | |
141 | int i; | |
142 | ||
143 | char *buffer = xmalloc (srec_frame); | |
144 | ||
145 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size); | |
146 | gdb_flush (gdb_stdout); | |
147 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
148 | { | |
149 | if (srec_frame > s->_raw_size - i) | |
150 | srec_frame = s->_raw_size - i; | |
151 | ||
152 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); | |
153 | bug_write_memory (s->vma + i, buffer, srec_frame); | |
154 | printf_filtered ("*"); | |
155 | gdb_flush (gdb_stdout); | |
156 | } | |
157 | printf_filtered ("\n"); | |
b8c9b27d | 158 | xfree (buffer); |
c906108c SS |
159 | } |
160 | s = s->next; | |
161 | } | |
162 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); | |
163 | sr_write_cr (buffer); | |
164 | gr_expect_prompt (); | |
165 | } | |
166 | ||
167 | #if 0 | |
168 | static char * | |
fba45db2 | 169 | get_word (char **p) |
c906108c SS |
170 | { |
171 | char *s = *p; | |
172 | char *word; | |
173 | char *copy; | |
174 | size_t len; | |
175 | ||
176 | while (isspace (*s)) | |
177 | s++; | |
178 | ||
179 | word = s; | |
180 | ||
181 | len = 0; | |
182 | ||
183 | while (*s && !isspace (*s)) | |
184 | { | |
185 | s++; | |
186 | len++; | |
187 | ||
188 | } | |
189 | copy = xmalloc (len + 1); | |
190 | memcpy (copy, word, len); | |
191 | copy[len] = 0; | |
192 | *p = s; | |
193 | return copy; | |
194 | } | |
195 | #endif | |
196 | ||
c5aa993b JM |
197 | static struct gr_settings bug_settings = |
198 | { | |
c5aa993b JM |
199 | "Bug>", /* prompt */ |
200 | &bug_ops, /* ops */ | |
201 | bug_clear_breakpoints, /* clear_all_breakpoints */ | |
c5aa993b | 202 | gr_generic_checkin, /* checkin */ |
c906108c SS |
203 | }; |
204 | ||
c5aa993b JM |
205 | static char *cpu_check_strings[] = |
206 | { | |
c906108c SS |
207 | "=", |
208 | "Invalid Register", | |
209 | }; | |
210 | ||
211 | static void | |
fba45db2 | 212 | bug_open (char *args, int from_tty) |
c906108c SS |
213 | { |
214 | if (args == NULL) | |
c5aa993b | 215 | args = ""; |
c906108c | 216 | |
c5aa993b | 217 | gr_open (args, from_tty, &bug_settings); |
c906108c | 218 | /* decide *now* whether we are on an 88100 or an 88110 */ |
c5aa993b JM |
219 | sr_write_cr ("rs cr06"); |
220 | sr_expect ("rs cr06"); | |
c906108c | 221 | |
c5aa993b | 222 | switch (gr_multi_scan (cpu_check_strings, 0)) |
c906108c | 223 | { |
c5aa993b | 224 | case 0: /* this is an m88100 */ |
c906108c SS |
225 | target_is_m88110 = 0; |
226 | break; | |
c5aa993b | 227 | case 1: /* this is an m88110 */ |
c906108c SS |
228 | target_is_m88110 = 1; |
229 | break; | |
230 | default: | |
e1e9e218 | 231 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c SS |
232 | } |
233 | } | |
234 | ||
235 | /* Tell the remote machine to resume. */ | |
236 | ||
237 | void | |
fba45db2 | 238 | bug_resume (int pid, int step, enum target_signal sig) |
c906108c | 239 | { |
c906108c SS |
240 | if (step) |
241 | { | |
c5aa993b | 242 | sr_write_cr ("t"); |
c906108c SS |
243 | |
244 | /* Force the next bug_wait to return a trap. Not doing anything | |
c5aa993b JM |
245 | about I/O from the target means that the user has to type |
246 | "continue" to see any. FIXME, this should be fixed. */ | |
c906108c SS |
247 | need_artificial_trap = 1; |
248 | } | |
249 | else | |
c5aa993b | 250 | sr_write_cr ("g"); |
c906108c SS |
251 | |
252 | return; | |
253 | } | |
254 | ||
255 | /* Wait until the remote machine stops, then return, | |
256 | storing status in STATUS just as `wait' would. */ | |
257 | ||
c5aa993b JM |
258 | static char *wait_strings[] = |
259 | { | |
c906108c SS |
260 | "At Breakpoint", |
261 | "Exception: Data Access Fault (Local Bus Timeout)", | |
c5aa993b | 262 | "\r8??\?-Bug>", /* The '\?' avoids creating a trigraph */ |
c906108c SS |
263 | "\r197-Bug>", |
264 | NULL, | |
265 | }; | |
266 | ||
267 | int | |
fba45db2 | 268 | bug_wait (int pid, struct target_waitstatus *status) |
c906108c | 269 | { |
c5aa993b | 270 | int old_timeout = sr_get_timeout (); |
c906108c SS |
271 | int old_immediate_quit = immediate_quit; |
272 | ||
273 | status->kind = TARGET_WAITKIND_EXITED; | |
274 | status->value.integer = 0; | |
275 | ||
276 | /* read off leftovers from resume so that the rest can be passed | |
277 | back out as stdout. */ | |
278 | if (need_artificial_trap == 0) | |
279 | { | |
c5aa993b JM |
280 | sr_expect ("Effective address: "); |
281 | (void) sr_get_hex_word (); | |
c906108c SS |
282 | sr_expect ("\r\n"); |
283 | } | |
284 | ||
c5aa993b JM |
285 | sr_set_timeout (-1); /* Don't time out -- user program is running. */ |
286 | immediate_quit = 1; /* Helps ability to QUIT */ | |
c906108c | 287 | |
c5aa993b | 288 | switch (gr_multi_scan (wait_strings, need_artificial_trap == 0)) |
c906108c | 289 | { |
c5aa993b | 290 | case 0: /* breakpoint case */ |
c906108c SS |
291 | status->kind = TARGET_WAITKIND_STOPPED; |
292 | status->value.sig = TARGET_SIGNAL_TRAP; | |
293 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 294 | gr_expect_prompt (); |
c906108c SS |
295 | break; |
296 | ||
c5aa993b | 297 | case 1: /* bus error */ |
c906108c SS |
298 | status->kind = TARGET_WAITKIND_STOPPED; |
299 | status->value.sig = TARGET_SIGNAL_BUS; | |
300 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 301 | gr_expect_prompt (); |
c906108c SS |
302 | break; |
303 | ||
c5aa993b | 304 | case 2: /* normal case */ |
c906108c SS |
305 | case 3: |
306 | if (need_artificial_trap != 0) | |
307 | { | |
308 | /* stepping */ | |
309 | status->kind = TARGET_WAITKIND_STOPPED; | |
310 | status->value.sig = TARGET_SIGNAL_TRAP; | |
311 | need_artificial_trap--; | |
312 | break; | |
313 | } | |
314 | else | |
315 | { | |
316 | /* exit case */ | |
317 | status->kind = TARGET_WAITKIND_EXITED; | |
318 | status->value.integer = 0; | |
319 | break; | |
320 | } | |
321 | ||
c5aa993b | 322 | case -1: /* trouble */ |
c906108c SS |
323 | default: |
324 | fprintf_filtered (gdb_stderr, | |
325 | "Trouble reading target during wait\n"); | |
326 | break; | |
327 | } | |
328 | ||
c5aa993b | 329 | sr_set_timeout (old_timeout); |
c906108c SS |
330 | immediate_quit = old_immediate_quit; |
331 | return 0; | |
332 | } | |
333 | ||
334 | /* Return the name of register number REGNO | |
335 | in the form input and output by bug. | |
336 | ||
337 | Returns a pointer to a static buffer containing the answer. */ | |
338 | static char * | |
fba45db2 | 339 | get_reg_name (int regno) |
c906108c | 340 | { |
c5aa993b JM |
341 | static char *rn[] = |
342 | { | |
c906108c SS |
343 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", |
344 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
345 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
346 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
347 | ||
c5aa993b | 348 | /* these get confusing because we omit a few and switch some ordering around. */ |
c906108c | 349 | |
c5aa993b JM |
350 | "cr01", /* 32 = psr */ |
351 | "fcr62", /* 33 = fpsr */ | |
352 | "fcr63", /* 34 = fpcr */ | |
c906108c SS |
353 | "ip", /* this is something of a cheat. */ |
354 | /* 35 = sxip */ | |
c5aa993b JM |
355 | "cr05", /* 36 = snip */ |
356 | "cr06", /* 37 = sfip */ | |
c906108c SS |
357 | |
358 | "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07", | |
359 | "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15", | |
360 | "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", | |
361 | "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", | |
362 | }; | |
363 | ||
364 | return rn[regno]; | |
365 | } | |
366 | ||
c5aa993b | 367 | #if 0 /* not currently used */ |
c906108c SS |
368 | /* Read from remote while the input matches STRING. Return zero on |
369 | success, -1 on failure. */ | |
370 | ||
371 | static int | |
fba45db2 | 372 | bug_scan (char *s) |
c906108c SS |
373 | { |
374 | int c; | |
375 | ||
376 | while (*s) | |
377 | { | |
c5aa993b | 378 | c = sr_readchar (); |
c906108c SS |
379 | if (c != *s++) |
380 | { | |
c5aa993b JM |
381 | fflush (stdout); |
382 | printf ("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
383 | return (-1); | |
c906108c SS |
384 | } |
385 | } | |
386 | ||
c5aa993b | 387 | return (0); |
c906108c SS |
388 | } |
389 | #endif /* never */ | |
390 | ||
391 | static int | |
fba45db2 | 392 | bug_srec_write_cr (char *s) |
c906108c SS |
393 | { |
394 | char *p = s; | |
395 | ||
396 | if (srec_echo_pace) | |
397 | for (p = s; *p; ++p) | |
398 | { | |
c5aa993b | 399 | if (sr_get_debug () > 0) |
c906108c SS |
400 | printf ("%c", *p); |
401 | ||
402 | do | |
c5aa993b JM |
403 | SERIAL_WRITE (sr_get_desc (), p, 1); |
404 | while (sr_pollchar () != *p); | |
c906108c SS |
405 | } |
406 | else | |
c5aa993b | 407 | { |
c906108c SS |
408 | sr_write_cr (s); |
409 | /* return(bug_scan (s) || bug_scan ("\n")); */ | |
410 | } | |
411 | ||
c5aa993b | 412 | return (0); |
c906108c SS |
413 | } |
414 | ||
415 | /* Store register REGNO, or all if REGNO == -1. */ | |
416 | ||
417 | static void | |
fba45db2 | 418 | bug_fetch_register (int regno) |
c906108c | 419 | { |
c5aa993b | 420 | sr_check_open (); |
c906108c SS |
421 | |
422 | if (regno == -1) | |
423 | { | |
424 | int i; | |
425 | ||
426 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 427 | bug_fetch_register (i); |
c906108c SS |
428 | } |
429 | else if (target_is_m88110 && regno == SFIP_REGNUM) | |
430 | { | |
431 | /* m88110 has no sfip. */ | |
432 | long l = 0; | |
c5aa993b | 433 | supply_register (regno, (char *) &l); |
c906108c SS |
434 | } |
435 | else if (regno < XFP_REGNUM) | |
436 | { | |
437 | char buffer[MAX_REGISTER_RAW_SIZE]; | |
438 | ||
439 | sr_write ("rs ", 3); | |
c5aa993b | 440 | sr_write_cr (get_reg_name (regno)); |
c906108c SS |
441 | sr_expect ("="); |
442 | store_unsigned_integer (buffer, REGISTER_RAW_SIZE (regno), | |
c5aa993b | 443 | sr_get_hex_word ()); |
c906108c SS |
444 | gr_expect_prompt (); |
445 | supply_register (regno, buffer); | |
446 | } | |
447 | else | |
448 | { | |
449 | /* Float register so we need to parse a strange data format. */ | |
450 | long p; | |
451 | unsigned char fpreg_buf[10]; | |
452 | ||
c5aa993b JM |
453 | sr_write ("rs ", 3); |
454 | sr_write (get_reg_name (regno), strlen (get_reg_name (regno))); | |
455 | sr_write_cr (";d"); | |
456 | sr_expect ("rs"); | |
457 | sr_expect (get_reg_name (regno)); | |
458 | sr_expect (";d"); | |
459 | sr_expect ("="); | |
c906108c SS |
460 | |
461 | /* sign */ | |
c5aa993b | 462 | p = sr_get_hex_digit (1); |
c906108c SS |
463 | fpreg_buf[0] = p << 7; |
464 | ||
465 | /* exponent */ | |
c5aa993b JM |
466 | sr_expect ("_"); |
467 | p = sr_get_hex_digit (1); | |
c906108c | 468 | fpreg_buf[0] += (p << 4); |
c5aa993b | 469 | fpreg_buf[0] += sr_get_hex_digit (1); |
c906108c | 470 | |
c5aa993b | 471 | fpreg_buf[1] = sr_get_hex_digit (1) << 4; |
c906108c SS |
472 | |
473 | /* fraction */ | |
c5aa993b JM |
474 | sr_expect ("_"); |
475 | fpreg_buf[1] += sr_get_hex_digit (1); | |
476 | ||
477 | fpreg_buf[2] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
478 | fpreg_buf[3] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
479 | fpreg_buf[4] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
480 | fpreg_buf[5] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
481 | fpreg_buf[6] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
482 | fpreg_buf[7] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
c906108c SS |
483 | fpreg_buf[8] = 0; |
484 | fpreg_buf[9] = 0; | |
485 | ||
c5aa993b JM |
486 | gr_expect_prompt (); |
487 | supply_register (regno, fpreg_buf); | |
c906108c SS |
488 | } |
489 | ||
490 | return; | |
491 | } | |
492 | ||
493 | /* Store register REGNO, or all if REGNO == -1. */ | |
494 | ||
495 | static void | |
fba45db2 | 496 | bug_store_register (int regno) |
c906108c SS |
497 | { |
498 | char buffer[1024]; | |
c5aa993b | 499 | sr_check_open (); |
c906108c SS |
500 | |
501 | if (regno == -1) | |
502 | { | |
503 | int i; | |
504 | ||
505 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 506 | bug_store_register (i); |
c906108c SS |
507 | } |
508 | else | |
509 | { | |
510 | char *regname; | |
511 | ||
c5aa993b | 512 | regname = get_reg_name (regno); |
c906108c SS |
513 | |
514 | if (target_is_m88110 && regno == SFIP_REGNUM) | |
515 | return; | |
516 | else if (regno < XFP_REGNUM) | |
c5aa993b JM |
517 | sprintf (buffer, "rs %s %08x", |
518 | regname, | |
519 | read_register (regno)); | |
c906108c SS |
520 | else |
521 | { | |
522 | unsigned char *fpreg_buf = | |
c5aa993b JM |
523 | (unsigned char *) ®isters[REGISTER_BYTE (regno)]; |
524 | ||
525 | sprintf (buffer, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d", | |
526 | regname, | |
527 | /* sign */ | |
528 | (fpreg_buf[0] >> 7) & 0xf, | |
529 | /* exponent */ | |
530 | fpreg_buf[0] & 0x7f, | |
531 | (fpreg_buf[1] >> 8) & 0xf, | |
532 | /* fraction */ | |
533 | fpreg_buf[1] & 0xf, | |
534 | fpreg_buf[2], | |
535 | fpreg_buf[3], | |
536 | fpreg_buf[4], | |
537 | fpreg_buf[5], | |
538 | fpreg_buf[6], | |
539 | fpreg_buf[7]); | |
c906108c SS |
540 | } |
541 | ||
c5aa993b JM |
542 | sr_write_cr (buffer); |
543 | gr_expect_prompt (); | |
c906108c SS |
544 | } |
545 | ||
546 | return; | |
547 | } | |
548 | ||
69dc947a KB |
549 | /* Transfer LEN bytes between GDB address MYADDR and target address |
550 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
551 | otherwise transfer them from the target. TARGET is unused. | |
552 | ||
553 | Returns the number of bytes transferred. */ | |
554 | ||
c906108c | 555 | int |
69dc947a | 556 | bug_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
29e57380 C |
557 | struct mem_attrib *attrib ATTRIBUTE_UNUSED, |
558 | struct target_ops *target ATTRIBUTE_UNUSED) | |
c906108c | 559 | { |
4930751a C |
560 | int res; |
561 | ||
8c9cdfe8 C |
562 | if (len <= 0) |
563 | return 0; | |
c906108c | 564 | |
4930751a C |
565 | if (write) |
566 | res = bug_write_memory (memaddr, myaddr, len); | |
567 | else | |
568 | res = bug_read_memory (memaddr, myaddr, len); | |
569 | ||
570 | return res; | |
c906108c SS |
571 | } |
572 | ||
573 | static void | |
fba45db2 | 574 | start_load (void) |
c906108c SS |
575 | { |
576 | char *command; | |
577 | ||
578 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
579 | ||
580 | sr_write_cr (command); | |
581 | sr_expect (command); | |
582 | sr_expect ("\r\n"); | |
583 | bug_srec_write_cr ("S0030000FC"); | |
584 | return; | |
585 | } | |
586 | ||
587 | /* This is an extremely vulnerable and fragile function. I've made | |
588 | considerable attempts to make this deterministic, but I've | |
589 | certainly forgotten something. The trouble is that S-records are | |
590 | only a partial file format, not a protocol. Worse, apparently the | |
591 | m88k bug monitor does not run in real time while receiving | |
592 | S-records. Hence, we must pay excruciating attention to when and | |
593 | where error messages are returned, and what has actually been sent. | |
594 | ||
595 | Each call represents a chunk of memory to be sent to the target. | |
596 | We break that chunk into an S0 header record, some number of S3 | |
597 | data records each containing srec_bytes, and an S7 termination | |
598 | record. */ | |
599 | ||
c5aa993b JM |
600 | static char *srecord_strings[] = |
601 | { | |
c906108c SS |
602 | "S-RECORD", |
603 | "-Bug>", | |
604 | NULL, | |
605 | }; | |
606 | ||
607 | static int | |
fba45db2 | 608 | bug_write_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
c906108c SS |
609 | { |
610 | int done; | |
611 | int checksum; | |
612 | int x; | |
613 | int retries; | |
614 | char *buffer = alloca ((srec_bytes + 8) << 1); | |
615 | ||
616 | retries = 0; | |
617 | ||
618 | do | |
619 | { | |
620 | done = 0; | |
621 | ||
622 | if (retries > srec_max_retries) | |
c5aa993b | 623 | return (-1); |
c906108c SS |
624 | |
625 | if (retries > 0) | |
626 | { | |
c5aa993b JM |
627 | if (sr_get_debug () > 0) |
628 | printf ("\n<retrying...>\n"); | |
c906108c SS |
629 | |
630 | /* This gr_expect_prompt call is extremely important. Without | |
631 | it, we will tend to resend our packet so fast that it | |
632 | will arrive before the bug monitor is ready to receive | |
633 | it. This would lead to a very ugly resend loop. */ | |
634 | ||
c5aa993b | 635 | gr_expect_prompt (); |
c906108c SS |
636 | } |
637 | ||
c5aa993b | 638 | start_load (); |
c906108c SS |
639 | |
640 | while (done < len) | |
641 | { | |
642 | int thisgo; | |
643 | int idx; | |
644 | char *buf = buffer; | |
645 | CORE_ADDR address; | |
646 | ||
647 | checksum = 0; | |
648 | thisgo = len - done; | |
649 | if (thisgo > srec_bytes) | |
650 | thisgo = srec_bytes; | |
651 | ||
652 | address = memaddr + done; | |
653 | sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address); | |
654 | buf += 12; | |
655 | ||
656 | checksum += (thisgo + 4 + 1 | |
657 | + (address & 0xff) | |
c5aa993b | 658 | + ((address >> 8) & 0xff) |
c906108c SS |
659 | + ((address >> 16) & 0xff) |
660 | + ((address >> 24) & 0xff)); | |
661 | ||
662 | for (idx = 0; idx < thisgo; idx++) | |
663 | { | |
664 | sprintf (buf, "%02X", myaddr[idx + done]); | |
665 | checksum += myaddr[idx + done]; | |
666 | buf += 2; | |
667 | } | |
668 | ||
669 | if (srec_noise > 0) | |
670 | { | |
671 | /* FIXME-NOW: insert a deliberate error every now and then. | |
c5aa993b JM |
672 | This is intended for testing/debugging the error handling |
673 | stuff. */ | |
c906108c SS |
674 | static int counter = 0; |
675 | if (++counter > srec_noise) | |
676 | { | |
677 | counter = 0; | |
678 | ++checksum; | |
679 | } | |
680 | } | |
681 | ||
c5aa993b | 682 | sprintf (buf, "%02X", ~checksum & 0xff); |
c906108c SS |
683 | bug_srec_write_cr (buffer); |
684 | ||
685 | if (srec_sleep != 0) | |
c5aa993b | 686 | sleep (srec_sleep); |
c906108c SS |
687 | |
688 | /* This pollchar is probably redundant to the gr_multi_scan | |
689 | below. Trouble is, we can't be sure when or where an | |
690 | error message will appear. Apparently, when running at | |
691 | full speed from a typical sun4, error messages tend to | |
692 | appear to arrive only *after* the s7 record. */ | |
693 | ||
c5aa993b | 694 | if ((x = sr_pollchar ()) != 0) |
c906108c | 695 | { |
c5aa993b JM |
696 | if (sr_get_debug () > 0) |
697 | printf ("\n<retrying...>\n"); | |
c906108c SS |
698 | |
699 | ++retries; | |
700 | ||
701 | /* flush any remaining input and verify that we are back | |
c5aa993b JM |
702 | at the prompt level. */ |
703 | gr_expect_prompt (); | |
c906108c | 704 | /* start all over again. */ |
c5aa993b | 705 | start_load (); |
c906108c SS |
706 | done = 0; |
707 | continue; | |
708 | } | |
709 | ||
710 | done += thisgo; | |
711 | } | |
712 | ||
c5aa993b | 713 | bug_srec_write_cr ("S7060000000000F9"); |
c906108c SS |
714 | ++retries; |
715 | ||
716 | /* Having finished the load, we need to figure out whether we | |
c5aa993b JM |
717 | had any errors. */ |
718 | } | |
719 | while (gr_multi_scan (srecord_strings, 0) == 0);; | |
c906108c | 720 | |
c5aa993b | 721 | return (0); |
c906108c SS |
722 | } |
723 | ||
724 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
725 | to inferior's memory at MEMADDR. Returns errno value. | |
c5aa993b | 726 | * sb/sh instructions don't work on unaligned addresses, when TU=1. |
c906108c SS |
727 | */ |
728 | ||
729 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
730 | at debugger address MYADDR. Returns errno value. */ | |
731 | static int | |
fba45db2 | 732 | bug_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
c906108c SS |
733 | { |
734 | char request[100]; | |
735 | char *buffer; | |
736 | char *p; | |
737 | char type; | |
738 | char size; | |
739 | unsigned char c; | |
740 | unsigned int inaddr; | |
741 | unsigned int checksum; | |
742 | ||
c5aa993b JM |
743 | sprintf (request, "du 0 %x:&%d", memaddr, len); |
744 | sr_write_cr (request); | |
c906108c | 745 | |
c5aa993b | 746 | p = buffer = alloca (len); |
c906108c SS |
747 | |
748 | /* scan up through the header */ | |
c5aa993b | 749 | sr_expect ("S0030000FC"); |
c906108c SS |
750 | |
751 | while (p < buffer + len) | |
752 | { | |
753 | /* scan off any white space. */ | |
c5aa993b | 754 | while (sr_readchar () != 'S');; |
c906108c SS |
755 | |
756 | /* what kind of s-rec? */ | |
c5aa993b | 757 | type = sr_readchar (); |
c906108c SS |
758 | |
759 | /* scan record size */ | |
c5aa993b | 760 | sr_get_hex_byte (&size); |
c906108c SS |
761 | checksum = size; |
762 | --size; | |
763 | inaddr = 0; | |
764 | ||
765 | switch (type) | |
766 | { | |
767 | case '7': | |
768 | case '8': | |
769 | case '9': | |
770 | goto done; | |
771 | ||
772 | case '3': | |
c5aa993b | 773 | sr_get_hex_byte (&c); |
c906108c SS |
774 | inaddr = (inaddr << 8) + c; |
775 | checksum += c; | |
776 | --size; | |
777 | /* intentional fall through */ | |
778 | case '2': | |
c5aa993b | 779 | sr_get_hex_byte (&c); |
c906108c SS |
780 | inaddr = (inaddr << 8) + c; |
781 | checksum += c; | |
782 | --size; | |
783 | /* intentional fall through */ | |
784 | case '1': | |
c5aa993b | 785 | sr_get_hex_byte (&c); |
c906108c SS |
786 | inaddr = (inaddr << 8) + c; |
787 | checksum += c; | |
788 | --size; | |
c5aa993b | 789 | sr_get_hex_byte (&c); |
c906108c SS |
790 | inaddr = (inaddr << 8) + c; |
791 | checksum += c; | |
792 | --size; | |
793 | break; | |
794 | ||
795 | default: | |
796 | /* bonk */ | |
c5aa993b | 797 | error ("reading s-records."); |
c906108c SS |
798 | } |
799 | ||
800 | if (inaddr < memaddr | |
801 | || (memaddr + len) < (inaddr + size)) | |
c5aa993b | 802 | error ("srec out of memory range."); |
c906108c SS |
803 | |
804 | if (p != buffer + inaddr - memaddr) | |
c5aa993b | 805 | error ("srec out of sequence."); |
c906108c SS |
806 | |
807 | for (; size; --size, ++p) | |
808 | { | |
c5aa993b | 809 | sr_get_hex_byte (p); |
c906108c SS |
810 | checksum += *p; |
811 | } | |
812 | ||
c5aa993b | 813 | sr_get_hex_byte (&c); |
c906108c | 814 | if (c != (~checksum & 0xff)) |
c5aa993b | 815 | error ("bad s-rec checksum"); |
c906108c SS |
816 | } |
817 | ||
c5aa993b JM |
818 | done: |
819 | gr_expect_prompt (); | |
c906108c | 820 | if (p != buffer + len) |
c5aa993b | 821 | return (1); |
c906108c | 822 | |
c5aa993b JM |
823 | memcpy (myaddr, buffer, len); |
824 | return (0); | |
c906108c SS |
825 | } |
826 | ||
827 | #define MAX_BREAKS 16 | |
828 | static int num_brkpts = 0; | |
69dc947a KB |
829 | |
830 | /* Insert a breakpoint at ADDR. SAVE is normally the address of the | |
831 | pattern buffer where the instruction that the breakpoint overwrites | |
832 | is saved. It is unused here since the bug is responsible for | |
833 | saving/restoring the original instruction. */ | |
834 | ||
c906108c | 835 | static int |
69dc947a | 836 | bug_insert_breakpoint (CORE_ADDR addr, char *save) |
c906108c SS |
837 | { |
838 | sr_check_open (); | |
839 | ||
840 | if (num_brkpts < MAX_BREAKS) | |
841 | { | |
842 | char buffer[100]; | |
843 | ||
844 | num_brkpts++; | |
845 | sprintf (buffer, "br %x", addr); | |
846 | sr_write_cr (buffer); | |
847 | gr_expect_prompt (); | |
c5aa993b | 848 | return (0); |
c906108c SS |
849 | } |
850 | else | |
851 | { | |
852 | fprintf_filtered (gdb_stderr, | |
853 | "Too many break points, break point not installed\n"); | |
c5aa993b | 854 | return (1); |
c906108c SS |
855 | } |
856 | ||
857 | } | |
69dc947a KB |
858 | |
859 | /* Remove a breakpoint at ADDR. SAVE is normally the previously | |
860 | saved pattern, but is unused here since the bug is responsible | |
861 | for saving/restoring instructions. */ | |
862 | ||
c906108c | 863 | static int |
69dc947a | 864 | bug_remove_breakpoint (CORE_ADDR addr, char *save) |
c906108c SS |
865 | { |
866 | if (num_brkpts > 0) | |
867 | { | |
868 | char buffer[100]; | |
869 | ||
870 | num_brkpts--; | |
871 | sprintf (buffer, "nobr %x", addr); | |
872 | sr_write_cr (buffer); | |
873 | gr_expect_prompt (); | |
874 | ||
875 | } | |
876 | return (0); | |
877 | } | |
878 | ||
879 | /* Clear the bugs notion of what the break points are */ | |
880 | static int | |
fba45db2 | 881 | bug_clear_breakpoints (void) |
c906108c SS |
882 | { |
883 | ||
c5aa993b | 884 | if (sr_is_open ()) |
c906108c SS |
885 | { |
886 | sr_write_cr ("nobr"); | |
c5aa993b | 887 | sr_expect ("nobr"); |
c906108c SS |
888 | gr_expect_prompt (); |
889 | } | |
890 | num_brkpts = 0; | |
c5aa993b | 891 | return (0); |
c906108c SS |
892 | } |
893 | ||
c5aa993b | 894 | struct target_ops bug_ops; |
c906108c | 895 | |
c5aa993b JM |
896 | static void |
897 | init_bug_ops (void) | |
c906108c | 898 | { |
c5aa993b JM |
899 | bug_ops.to_shortname = "bug"; |
900 | "Remote BUG monitor", | |
901 | bug_ops.to_longname = "Use the mvme187 board running the BUG monitor connected by a serial line."; | |
902 | bug_ops.to_doc = " "; | |
903 | bug_ops.to_open = bug_open; | |
904 | bug_ops.to_close = gr_close; | |
905 | bug_ops.to_attach = 0; | |
c906108c SS |
906 | bug_ops.to_post_attach = NULL; |
907 | bug_ops.to_require_attach = NULL; | |
c5aa993b | 908 | bug_ops.to_detach = gr_detach; |
c906108c | 909 | bug_ops.to_require_detach = NULL; |
c5aa993b JM |
910 | bug_ops.to_resume = bug_resume; |
911 | bug_ops.to_wait = bug_wait; | |
c906108c | 912 | bug_ops.to_post_wait = NULL; |
c5aa993b JM |
913 | bug_ops.to_fetch_registers = bug_fetch_register; |
914 | bug_ops.to_store_registers = bug_store_register; | |
915 | bug_ops.to_prepare_to_store = gr_prepare_to_store; | |
916 | bug_ops.to_xfer_memory = bug_xfer_memory; | |
917 | bug_ops.to_files_info = gr_files_info; | |
918 | bug_ops.to_insert_breakpoint = bug_insert_breakpoint; | |
919 | bug_ops.to_remove_breakpoint = bug_remove_breakpoint; | |
920 | bug_ops.to_terminal_init = 0; | |
921 | bug_ops.to_terminal_inferior = 0; | |
922 | bug_ops.to_terminal_ours_for_output = 0; | |
923 | bug_ops.to_terminal_ours = 0; | |
924 | bug_ops.to_terminal_info = 0; | |
925 | bug_ops.to_kill = gr_kill; | |
926 | bug_ops.to_load = bug_load; | |
927 | bug_ops.to_lookup_symbol = 0; | |
928 | bug_ops.to_create_inferior = gr_create_inferior; | |
c906108c SS |
929 | bug_ops.to_post_startup_inferior = NULL; |
930 | bug_ops.to_acknowledge_created_inferior = NULL; | |
c5aa993b JM |
931 | bug_ops.to_clone_and_follow_inferior = NULL; |
932 | bug_ops.to_post_follow_inferior_by_clone = NULL; | |
c906108c SS |
933 | bug_ops.to_insert_fork_catchpoint = NULL; |
934 | bug_ops.to_remove_fork_catchpoint = NULL; | |
935 | bug_ops.to_insert_vfork_catchpoint = NULL; | |
c5aa993b | 936 | bug_ops.to_remove_vfork_catchpoint = NULL; |
c906108c | 937 | bug_ops.to_has_forked = NULL; |
c5aa993b JM |
938 | bug_ops.to_has_vforked = NULL; |
939 | bug_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
c906108c SS |
940 | bug_ops.to_post_follow_vfork = NULL; |
941 | bug_ops.to_insert_exec_catchpoint = NULL; | |
942 | bug_ops.to_remove_exec_catchpoint = NULL; | |
943 | bug_ops.to_has_execd = NULL; | |
944 | bug_ops.to_reported_exec_events_per_exec_call = NULL; | |
945 | bug_ops.to_has_exited = NULL; | |
c5aa993b JM |
946 | bug_ops.to_mourn_inferior = gr_mourn; |
947 | bug_ops.to_can_run = 0; | |
948 | bug_ops.to_notice_signals = 0; | |
949 | bug_ops.to_thread_alive = 0; | |
950 | bug_ops.to_stop = 0; | |
c906108c SS |
951 | bug_ops.to_pid_to_exec_file = NULL; |
952 | bug_ops.to_core_file_to_sym_file = NULL; | |
c5aa993b JM |
953 | bug_ops.to_stratum = process_stratum; |
954 | bug_ops.DONT_USE = 0; | |
955 | bug_ops.to_has_all_memory = 1; | |
956 | bug_ops.to_has_memory = 1; | |
957 | bug_ops.to_has_stack = 1; | |
958 | bug_ops.to_has_registers = 0; | |
959 | bug_ops.to_has_execution = 0; | |
960 | bug_ops.to_sections = 0; | |
961 | bug_ops.to_sections_end = 0; | |
962 | bug_ops.to_magic = OPS_MAGIC; /* Always the last thing */ | |
963 | } /* init_bug_ops */ | |
c906108c SS |
964 | |
965 | void | |
fba45db2 | 966 | _initialize_remote_bug (void) |
c906108c | 967 | { |
c5aa993b | 968 | init_bug_ops (); |
c906108c SS |
969 | add_target (&bug_ops); |
970 | ||
971 | add_show_from_set | |
972 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
973 | (char *) &srec_bytes, | |
974 | "\ | |
975 | Set the number of bytes represented in each S-record.\n\ | |
976 | This affects the communication protocol with the remote target.", | |
977 | &setlist), | |
978 | &showlist); | |
979 | ||
980 | add_show_from_set | |
981 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
982 | (char *) &srec_max_retries, | |
983 | "\ | |
984 | Set the number of retries for shipping S-records.\n\ | |
985 | This affects the communication protocol with the remote target.", | |
986 | &setlist), | |
987 | &showlist); | |
988 | ||
989 | #if 0 | |
990 | /* This needs to set SREC_SIZE, not srec_frame which gets changed at the | |
991 | end of a download. But do we need the option at all? */ | |
992 | add_show_from_set | |
993 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
994 | (char *) &srec_frame, | |
995 | "\ | |
996 | Set the number of bytes in an S-record frame.\n\ | |
997 | This affects the communication protocol with the remote target.", | |
998 | &setlist), | |
999 | &showlist); | |
1000 | #endif /* 0 */ | |
1001 | ||
1002 | add_show_from_set | |
1003 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1004 | (char *) &srec_noise, | |
1005 | "\ | |
1006 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1007 | Zero means flub none at all. This affects the communication protocol\n\ | |
1008 | with the remote target.", | |
1009 | &setlist), | |
1010 | &showlist); | |
1011 | ||
1012 | add_show_from_set | |
1013 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1014 | (char *) &srec_sleep, | |
1015 | "\ | |
1016 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1017 | This affects the communication protocol with the remote target.", | |
1018 | &setlist), | |
1019 | &showlist); | |
1020 | ||
1021 | add_show_from_set | |
1022 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1023 | (char *) &srec_echo_pace, | |
1024 | "\ | |
1025 | Set echo-verification.\n\ | |
1026 | When on, use verification by echo when downloading S-records. This is\n\ | |
c5aa993b | 1027 | much slower, but generally more reliable.", |
c906108c SS |
1028 | &setlist), |
1029 | &showlist); | |
1030 | } |