Commit | Line | Data |
---|---|---|
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 | ||
899ff3a2 | 38 | #include "serial.h" |
c906108c SS |
39 | #include "remote-utils.h" |
40 | ||
c906108c SS |
41 | /* External data declarations */ |
42 | extern int stop_soon_quietly; /* for wait_for_inferior */ | |
43 | ||
44 | /* Forward data declarations */ | |
45 | extern struct target_ops bug_ops; /* Forward declaration */ | |
46 | ||
47 | /* Forward function declarations */ | |
a14ed312 | 48 | static int bug_clear_breakpoints (void); |
c906108c | 49 | |
a14ed312 KB |
50 | static int bug_read_memory (CORE_ADDR memaddr, |
51 | unsigned char *myaddr, int len); | |
c906108c | 52 | |
a14ed312 KB |
53 | static int bug_write_memory (CORE_ADDR memaddr, |
54 | unsigned char *myaddr, int len); | |
c906108c SS |
55 | |
56 | /* This variable is somewhat arbitrary. It's here so that it can be | |
57 | set from within a running gdb. */ | |
58 | ||
59 | static int srec_max_retries = 3; | |
60 | ||
61 | /* Each S-record download to the target consists of an S0 header | |
62 | record, some number of S3 data records, and one S7 termination | |
63 | record. I call this download a "frame". Srec_frame says how many | |
64 | bytes will be represented in each frame. */ | |
65 | ||
66 | #define SREC_SIZE 160 | |
67 | static int srec_frame = SREC_SIZE; | |
68 | ||
69 | /* This variable determines how many bytes will be represented in each | |
70 | S3 s-record. */ | |
71 | ||
72 | static int srec_bytes = 40; | |
73 | ||
74 | /* At one point it appeared to me as though the bug monitor could not | |
75 | really be expected to receive two sequential characters at 9600 | |
76 | baud reliably. Echo-pacing is an attempt to force data across the | |
77 | line even in this condition. Specifically, in echo-pace mode, each | |
78 | character is sent one at a time and we look for the echo before | |
79 | sending the next. This is excruciatingly slow. */ | |
80 | ||
81 | static int srec_echo_pace = 0; | |
82 | ||
83 | /* How long to wait after an srec for a possible error message. | |
84 | Similar to the above, I tried sleeping after sending each S3 record | |
85 | in hopes that I might actually see error messages from the bug | |
86 | monitor. This might actually work if we were to use sleep | |
87 | intervals smaller than 1 second. */ | |
88 | ||
89 | static int srec_sleep = 0; | |
90 | ||
91 | /* Every srec_noise records, flub the checksum. This is a debugging | |
92 | feature. Set the variable to something other than 1 in order to | |
93 | inject *deliberate* checksum errors. One might do this if one | |
94 | wanted to test error handling and recovery. */ | |
95 | ||
96 | static int srec_noise = 0; | |
97 | ||
98 | /* Called when SIGALRM signal sent due to alarm() timeout. */ | |
99 | ||
100 | /* Number of SIGTRAPs we need to simulate. That is, the next | |
101 | NEED_ARTIFICIAL_TRAP calls to bug_wait should just return | |
102 | SIGTRAP without actually waiting for anything. */ | |
103 | ||
104 | static int need_artificial_trap = 0; | |
105 | ||
106 | /* | |
107 | * Download a file specified in 'args', to the bug. | |
108 | */ | |
109 | ||
110 | static void | |
fba45db2 | 111 | bug_load (char *args, int fromtty) |
c906108c SS |
112 | { |
113 | bfd *abfd; | |
114 | asection *s; | |
115 | char buffer[1024]; | |
116 | ||
117 | sr_check_open (); | |
118 | ||
39f77062 | 119 | inferior_ptid = null_ptid; |
c906108c SS |
120 | abfd = bfd_openr (args, 0); |
121 | if (!abfd) | |
122 | { | |
123 | printf_filtered ("Unable to open file %s\n", args); | |
124 | return; | |
125 | } | |
126 | ||
127 | if (bfd_check_format (abfd, bfd_object) == 0) | |
128 | { | |
129 | printf_filtered ("File is not an object file\n"); | |
130 | return; | |
131 | } | |
132 | ||
133 | s = abfd->sections; | |
134 | while (s != (asection *) NULL) | |
135 | { | |
136 | srec_frame = SREC_SIZE; | |
137 | if (s->flags & SEC_LOAD) | |
138 | { | |
139 | int i; | |
140 | ||
141 | char *buffer = xmalloc (srec_frame); | |
142 | ||
971ff545 | 143 | printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name, s->vma, s->vma + s->_raw_size); |
c906108c SS |
144 | gdb_flush (gdb_stdout); |
145 | for (i = 0; i < s->_raw_size; i += srec_frame) | |
146 | { | |
147 | if (srec_frame > s->_raw_size - i) | |
148 | srec_frame = s->_raw_size - i; | |
149 | ||
150 | bfd_get_section_contents (abfd, s, buffer, i, srec_frame); | |
151 | bug_write_memory (s->vma + i, buffer, srec_frame); | |
152 | printf_filtered ("*"); | |
153 | gdb_flush (gdb_stdout); | |
154 | } | |
155 | printf_filtered ("\n"); | |
b8c9b27d | 156 | xfree (buffer); |
c906108c SS |
157 | } |
158 | s = s->next; | |
159 | } | |
160 | sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address); | |
161 | sr_write_cr (buffer); | |
162 | gr_expect_prompt (); | |
163 | } | |
164 | ||
165 | #if 0 | |
166 | static char * | |
fba45db2 | 167 | get_word (char **p) |
c906108c SS |
168 | { |
169 | char *s = *p; | |
170 | char *word; | |
171 | char *copy; | |
172 | size_t len; | |
173 | ||
174 | while (isspace (*s)) | |
175 | s++; | |
176 | ||
177 | word = s; | |
178 | ||
179 | len = 0; | |
180 | ||
181 | while (*s && !isspace (*s)) | |
182 | { | |
183 | s++; | |
184 | len++; | |
185 | ||
186 | } | |
187 | copy = xmalloc (len + 1); | |
188 | memcpy (copy, word, len); | |
189 | copy[len] = 0; | |
190 | *p = s; | |
191 | return copy; | |
192 | } | |
193 | #endif | |
194 | ||
c5aa993b JM |
195 | static struct gr_settings bug_settings = |
196 | { | |
c5aa993b JM |
197 | "Bug>", /* prompt */ |
198 | &bug_ops, /* ops */ | |
199 | bug_clear_breakpoints, /* clear_all_breakpoints */ | |
c5aa993b | 200 | gr_generic_checkin, /* checkin */ |
c906108c SS |
201 | }; |
202 | ||
c5aa993b JM |
203 | static char *cpu_check_strings[] = |
204 | { | |
c906108c SS |
205 | "=", |
206 | "Invalid Register", | |
207 | }; | |
208 | ||
209 | static void | |
fba45db2 | 210 | bug_open (char *args, int from_tty) |
c906108c SS |
211 | { |
212 | if (args == NULL) | |
c5aa993b | 213 | args = ""; |
c906108c | 214 | |
c5aa993b | 215 | gr_open (args, from_tty, &bug_settings); |
c906108c | 216 | /* decide *now* whether we are on an 88100 or an 88110 */ |
c5aa993b JM |
217 | sr_write_cr ("rs cr06"); |
218 | sr_expect ("rs cr06"); | |
c906108c | 219 | |
c5aa993b | 220 | switch (gr_multi_scan (cpu_check_strings, 0)) |
c906108c | 221 | { |
c5aa993b | 222 | case 0: /* this is an m88100 */ |
c906108c SS |
223 | target_is_m88110 = 0; |
224 | break; | |
c5aa993b | 225 | case 1: /* this is an m88110 */ |
c906108c SS |
226 | target_is_m88110 = 1; |
227 | break; | |
228 | default: | |
e1e9e218 | 229 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c SS |
230 | } |
231 | } | |
232 | ||
233 | /* Tell the remote machine to resume. */ | |
234 | ||
235 | void | |
39f77062 | 236 | bug_resume (ptid_t ptid, int step, enum target_signal sig) |
c906108c | 237 | { |
c906108c SS |
238 | if (step) |
239 | { | |
c5aa993b | 240 | sr_write_cr ("t"); |
c906108c SS |
241 | |
242 | /* Force the next bug_wait to return a trap. Not doing anything | |
c5aa993b JM |
243 | about I/O from the target means that the user has to type |
244 | "continue" to see any. FIXME, this should be fixed. */ | |
c906108c SS |
245 | need_artificial_trap = 1; |
246 | } | |
247 | else | |
c5aa993b | 248 | sr_write_cr ("g"); |
c906108c SS |
249 | |
250 | return; | |
251 | } | |
252 | ||
253 | /* Wait until the remote machine stops, then return, | |
254 | storing status in STATUS just as `wait' would. */ | |
255 | ||
c5aa993b JM |
256 | static char *wait_strings[] = |
257 | { | |
c906108c SS |
258 | "At Breakpoint", |
259 | "Exception: Data Access Fault (Local Bus Timeout)", | |
c5aa993b | 260 | "\r8??\?-Bug>", /* The '\?' avoids creating a trigraph */ |
c906108c SS |
261 | "\r197-Bug>", |
262 | NULL, | |
263 | }; | |
264 | ||
39f77062 KB |
265 | ptid_t |
266 | bug_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c | 267 | { |
c5aa993b | 268 | int old_timeout = sr_get_timeout (); |
c906108c SS |
269 | int old_immediate_quit = immediate_quit; |
270 | ||
271 | status->kind = TARGET_WAITKIND_EXITED; | |
272 | status->value.integer = 0; | |
273 | ||
274 | /* read off leftovers from resume so that the rest can be passed | |
275 | back out as stdout. */ | |
276 | if (need_artificial_trap == 0) | |
277 | { | |
c5aa993b JM |
278 | sr_expect ("Effective address: "); |
279 | (void) sr_get_hex_word (); | |
c906108c SS |
280 | sr_expect ("\r\n"); |
281 | } | |
282 | ||
c5aa993b JM |
283 | sr_set_timeout (-1); /* Don't time out -- user program is running. */ |
284 | immediate_quit = 1; /* Helps ability to QUIT */ | |
c906108c | 285 | |
c5aa993b | 286 | switch (gr_multi_scan (wait_strings, need_artificial_trap == 0)) |
c906108c | 287 | { |
c5aa993b | 288 | case 0: /* breakpoint case */ |
c906108c SS |
289 | status->kind = TARGET_WAITKIND_STOPPED; |
290 | status->value.sig = TARGET_SIGNAL_TRAP; | |
291 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 292 | gr_expect_prompt (); |
c906108c SS |
293 | break; |
294 | ||
c5aa993b | 295 | case 1: /* bus error */ |
c906108c SS |
296 | status->kind = TARGET_WAITKIND_STOPPED; |
297 | status->value.sig = TARGET_SIGNAL_BUS; | |
298 | /* user output from the target can be discarded here. (?) */ | |
c5aa993b | 299 | gr_expect_prompt (); |
c906108c SS |
300 | break; |
301 | ||
c5aa993b | 302 | case 2: /* normal case */ |
c906108c SS |
303 | case 3: |
304 | if (need_artificial_trap != 0) | |
305 | { | |
306 | /* stepping */ | |
307 | status->kind = TARGET_WAITKIND_STOPPED; | |
308 | status->value.sig = TARGET_SIGNAL_TRAP; | |
309 | need_artificial_trap--; | |
310 | break; | |
311 | } | |
312 | else | |
313 | { | |
314 | /* exit case */ | |
315 | status->kind = TARGET_WAITKIND_EXITED; | |
316 | status->value.integer = 0; | |
317 | break; | |
318 | } | |
319 | ||
c5aa993b | 320 | case -1: /* trouble */ |
c906108c SS |
321 | default: |
322 | fprintf_filtered (gdb_stderr, | |
323 | "Trouble reading target during wait\n"); | |
324 | break; | |
325 | } | |
326 | ||
c5aa993b | 327 | sr_set_timeout (old_timeout); |
c906108c | 328 | immediate_quit = old_immediate_quit; |
39f77062 | 329 | return inferior_ptid; |
c906108c SS |
330 | } |
331 | ||
332 | /* Return the name of register number REGNO | |
333 | in the form input and output by bug. | |
334 | ||
335 | Returns a pointer to a static buffer containing the answer. */ | |
336 | static char * | |
fba45db2 | 337 | get_reg_name (int regno) |
c906108c | 338 | { |
c5aa993b JM |
339 | static char *rn[] = |
340 | { | |
c906108c SS |
341 | "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07", |
342 | "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15", | |
343 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
344 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
345 | ||
c5aa993b | 346 | /* these get confusing because we omit a few and switch some ordering around. */ |
c906108c | 347 | |
c5aa993b JM |
348 | "cr01", /* 32 = psr */ |
349 | "fcr62", /* 33 = fpsr */ | |
350 | "fcr63", /* 34 = fpcr */ | |
c906108c SS |
351 | "ip", /* this is something of a cheat. */ |
352 | /* 35 = sxip */ | |
c5aa993b JM |
353 | "cr05", /* 36 = snip */ |
354 | "cr06", /* 37 = sfip */ | |
c906108c SS |
355 | |
356 | "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07", | |
357 | "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15", | |
358 | "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", | |
359 | "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31", | |
360 | }; | |
361 | ||
362 | return rn[regno]; | |
363 | } | |
364 | ||
c5aa993b | 365 | #if 0 /* not currently used */ |
c906108c SS |
366 | /* Read from remote while the input matches STRING. Return zero on |
367 | success, -1 on failure. */ | |
368 | ||
369 | static int | |
fba45db2 | 370 | bug_scan (char *s) |
c906108c SS |
371 | { |
372 | int c; | |
373 | ||
374 | while (*s) | |
375 | { | |
c5aa993b | 376 | c = sr_readchar (); |
c906108c SS |
377 | if (c != *s++) |
378 | { | |
c5aa993b JM |
379 | fflush (stdout); |
380 | printf ("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s); | |
381 | return (-1); | |
c906108c SS |
382 | } |
383 | } | |
384 | ||
c5aa993b | 385 | return (0); |
c906108c SS |
386 | } |
387 | #endif /* never */ | |
388 | ||
389 | static int | |
fba45db2 | 390 | bug_srec_write_cr (char *s) |
c906108c SS |
391 | { |
392 | char *p = s; | |
393 | ||
394 | if (srec_echo_pace) | |
395 | for (p = s; *p; ++p) | |
396 | { | |
c5aa993b | 397 | if (sr_get_debug () > 0) |
c906108c SS |
398 | printf ("%c", *p); |
399 | ||
400 | do | |
c5aa993b JM |
401 | SERIAL_WRITE (sr_get_desc (), p, 1); |
402 | while (sr_pollchar () != *p); | |
c906108c SS |
403 | } |
404 | else | |
c5aa993b | 405 | { |
c906108c SS |
406 | sr_write_cr (s); |
407 | /* return(bug_scan (s) || bug_scan ("\n")); */ | |
408 | } | |
409 | ||
c5aa993b | 410 | return (0); |
c906108c SS |
411 | } |
412 | ||
413 | /* Store register REGNO, or all if REGNO == -1. */ | |
414 | ||
415 | static void | |
fba45db2 | 416 | bug_fetch_register (int regno) |
c906108c | 417 | { |
c5aa993b | 418 | sr_check_open (); |
c906108c SS |
419 | |
420 | if (regno == -1) | |
421 | { | |
422 | int i; | |
423 | ||
424 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 425 | bug_fetch_register (i); |
c906108c SS |
426 | } |
427 | else if (target_is_m88110 && regno == SFIP_REGNUM) | |
428 | { | |
429 | /* m88110 has no sfip. */ | |
430 | long l = 0; | |
c5aa993b | 431 | supply_register (regno, (char *) &l); |
c906108c SS |
432 | } |
433 | else if (regno < XFP_REGNUM) | |
434 | { | |
435 | char buffer[MAX_REGISTER_RAW_SIZE]; | |
436 | ||
437 | sr_write ("rs ", 3); | |
c5aa993b | 438 | sr_write_cr (get_reg_name (regno)); |
c906108c SS |
439 | sr_expect ("="); |
440 | store_unsigned_integer (buffer, REGISTER_RAW_SIZE (regno), | |
c5aa993b | 441 | sr_get_hex_word ()); |
c906108c SS |
442 | gr_expect_prompt (); |
443 | supply_register (regno, buffer); | |
444 | } | |
445 | else | |
446 | { | |
447 | /* Float register so we need to parse a strange data format. */ | |
448 | long p; | |
449 | unsigned char fpreg_buf[10]; | |
450 | ||
c5aa993b JM |
451 | sr_write ("rs ", 3); |
452 | sr_write (get_reg_name (regno), strlen (get_reg_name (regno))); | |
453 | sr_write_cr (";d"); | |
454 | sr_expect ("rs"); | |
455 | sr_expect (get_reg_name (regno)); | |
456 | sr_expect (";d"); | |
457 | sr_expect ("="); | |
c906108c SS |
458 | |
459 | /* sign */ | |
c5aa993b | 460 | p = sr_get_hex_digit (1); |
c906108c SS |
461 | fpreg_buf[0] = p << 7; |
462 | ||
463 | /* exponent */ | |
c5aa993b JM |
464 | sr_expect ("_"); |
465 | p = sr_get_hex_digit (1); | |
c906108c | 466 | fpreg_buf[0] += (p << 4); |
c5aa993b | 467 | fpreg_buf[0] += sr_get_hex_digit (1); |
c906108c | 468 | |
c5aa993b | 469 | fpreg_buf[1] = sr_get_hex_digit (1) << 4; |
c906108c SS |
470 | |
471 | /* fraction */ | |
c5aa993b JM |
472 | sr_expect ("_"); |
473 | fpreg_buf[1] += sr_get_hex_digit (1); | |
474 | ||
475 | fpreg_buf[2] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
476 | fpreg_buf[3] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
477 | fpreg_buf[4] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
478 | fpreg_buf[5] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
479 | fpreg_buf[6] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
480 | fpreg_buf[7] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1); | |
c906108c SS |
481 | fpreg_buf[8] = 0; |
482 | fpreg_buf[9] = 0; | |
483 | ||
c5aa993b JM |
484 | gr_expect_prompt (); |
485 | supply_register (regno, fpreg_buf); | |
c906108c SS |
486 | } |
487 | ||
488 | return; | |
489 | } | |
490 | ||
491 | /* Store register REGNO, or all if REGNO == -1. */ | |
492 | ||
493 | static void | |
fba45db2 | 494 | bug_store_register (int regno) |
c906108c SS |
495 | { |
496 | char buffer[1024]; | |
c5aa993b | 497 | sr_check_open (); |
c906108c SS |
498 | |
499 | if (regno == -1) | |
500 | { | |
501 | int i; | |
502 | ||
503 | for (i = 0; i < NUM_REGS; ++i) | |
c5aa993b | 504 | bug_store_register (i); |
c906108c SS |
505 | } |
506 | else | |
507 | { | |
508 | char *regname; | |
509 | ||
c5aa993b | 510 | regname = get_reg_name (regno); |
c906108c SS |
511 | |
512 | if (target_is_m88110 && regno == SFIP_REGNUM) | |
513 | return; | |
514 | else if (regno < XFP_REGNUM) | |
971ff545 | 515 | sprintf (buffer, "rs %s %08lx", |
c5aa993b | 516 | regname, |
971ff545 | 517 | (long) read_register (regno)); |
c906108c SS |
518 | else |
519 | { | |
520 | unsigned char *fpreg_buf = | |
c5aa993b JM |
521 | (unsigned char *) ®isters[REGISTER_BYTE (regno)]; |
522 | ||
523 | sprintf (buffer, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d", | |
524 | regname, | |
525 | /* sign */ | |
526 | (fpreg_buf[0] >> 7) & 0xf, | |
527 | /* exponent */ | |
528 | fpreg_buf[0] & 0x7f, | |
529 | (fpreg_buf[1] >> 8) & 0xf, | |
530 | /* fraction */ | |
531 | fpreg_buf[1] & 0xf, | |
532 | fpreg_buf[2], | |
533 | fpreg_buf[3], | |
534 | fpreg_buf[4], | |
535 | fpreg_buf[5], | |
536 | fpreg_buf[6], | |
537 | fpreg_buf[7]); | |
c906108c SS |
538 | } |
539 | ||
c5aa993b JM |
540 | sr_write_cr (buffer); |
541 | gr_expect_prompt (); | |
c906108c SS |
542 | } |
543 | ||
544 | return; | |
545 | } | |
546 | ||
69dc947a KB |
547 | /* Transfer LEN bytes between GDB address MYADDR and target address |
548 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
549 | otherwise transfer them from the target. TARGET is unused. | |
550 | ||
551 | Returns the number of bytes transferred. */ | |
552 | ||
c906108c | 553 | int |
69dc947a | 554 | bug_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
29e57380 C |
555 | struct mem_attrib *attrib ATTRIBUTE_UNUSED, |
556 | struct target_ops *target ATTRIBUTE_UNUSED) | |
c906108c | 557 | { |
4930751a C |
558 | int res; |
559 | ||
8c9cdfe8 C |
560 | if (len <= 0) |
561 | return 0; | |
c906108c | 562 | |
4930751a C |
563 | if (write) |
564 | res = bug_write_memory (memaddr, myaddr, len); | |
565 | else | |
566 | res = bug_read_memory (memaddr, myaddr, len); | |
567 | ||
568 | return res; | |
c906108c SS |
569 | } |
570 | ||
571 | static void | |
fba45db2 | 572 | start_load (void) |
c906108c SS |
573 | { |
574 | char *command; | |
575 | ||
576 | command = (srec_echo_pace ? "lo 0 ;x" : "lo 0"); | |
577 | ||
578 | sr_write_cr (command); | |
579 | sr_expect (command); | |
580 | sr_expect ("\r\n"); | |
581 | bug_srec_write_cr ("S0030000FC"); | |
582 | return; | |
583 | } | |
584 | ||
585 | /* This is an extremely vulnerable and fragile function. I've made | |
586 | considerable attempts to make this deterministic, but I've | |
587 | certainly forgotten something. The trouble is that S-records are | |
588 | only a partial file format, not a protocol. Worse, apparently the | |
589 | m88k bug monitor does not run in real time while receiving | |
590 | S-records. Hence, we must pay excruciating attention to when and | |
591 | where error messages are returned, and what has actually been sent. | |
592 | ||
593 | Each call represents a chunk of memory to be sent to the target. | |
594 | We break that chunk into an S0 header record, some number of S3 | |
595 | data records each containing srec_bytes, and an S7 termination | |
596 | record. */ | |
597 | ||
c5aa993b JM |
598 | static char *srecord_strings[] = |
599 | { | |
c906108c SS |
600 | "S-RECORD", |
601 | "-Bug>", | |
602 | NULL, | |
603 | }; | |
604 | ||
605 | static int | |
fba45db2 | 606 | bug_write_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
c906108c SS |
607 | { |
608 | int done; | |
609 | int checksum; | |
610 | int x; | |
611 | int retries; | |
612 | char *buffer = alloca ((srec_bytes + 8) << 1); | |
613 | ||
614 | retries = 0; | |
615 | ||
616 | do | |
617 | { | |
618 | done = 0; | |
619 | ||
620 | if (retries > srec_max_retries) | |
c5aa993b | 621 | return (-1); |
c906108c SS |
622 | |
623 | if (retries > 0) | |
624 | { | |
c5aa993b JM |
625 | if (sr_get_debug () > 0) |
626 | printf ("\n<retrying...>\n"); | |
c906108c SS |
627 | |
628 | /* This gr_expect_prompt call is extremely important. Without | |
629 | it, we will tend to resend our packet so fast that it | |
630 | will arrive before the bug monitor is ready to receive | |
631 | it. This would lead to a very ugly resend loop. */ | |
632 | ||
c5aa993b | 633 | gr_expect_prompt (); |
c906108c SS |
634 | } |
635 | ||
c5aa993b | 636 | start_load (); |
c906108c SS |
637 | |
638 | while (done < len) | |
639 | { | |
640 | int thisgo; | |
641 | int idx; | |
642 | char *buf = buffer; | |
643 | CORE_ADDR address; | |
644 | ||
645 | checksum = 0; | |
646 | thisgo = len - done; | |
647 | if (thisgo > srec_bytes) | |
648 | thisgo = srec_bytes; | |
649 | ||
650 | address = memaddr + done; | |
971ff545 | 651 | sprintf (buf, "S3%02X%08lX", thisgo + 4 + 1, (long) address); |
c906108c SS |
652 | buf += 12; |
653 | ||
654 | checksum += (thisgo + 4 + 1 | |
655 | + (address & 0xff) | |
c5aa993b | 656 | + ((address >> 8) & 0xff) |
c906108c SS |
657 | + ((address >> 16) & 0xff) |
658 | + ((address >> 24) & 0xff)); | |
659 | ||
660 | for (idx = 0; idx < thisgo; idx++) | |
661 | { | |
662 | sprintf (buf, "%02X", myaddr[idx + done]); | |
663 | checksum += myaddr[idx + done]; | |
664 | buf += 2; | |
665 | } | |
666 | ||
667 | if (srec_noise > 0) | |
668 | { | |
669 | /* FIXME-NOW: insert a deliberate error every now and then. | |
c5aa993b JM |
670 | This is intended for testing/debugging the error handling |
671 | stuff. */ | |
c906108c SS |
672 | static int counter = 0; |
673 | if (++counter > srec_noise) | |
674 | { | |
675 | counter = 0; | |
676 | ++checksum; | |
677 | } | |
678 | } | |
679 | ||
c5aa993b | 680 | sprintf (buf, "%02X", ~checksum & 0xff); |
c906108c SS |
681 | bug_srec_write_cr (buffer); |
682 | ||
683 | if (srec_sleep != 0) | |
c5aa993b | 684 | sleep (srec_sleep); |
c906108c SS |
685 | |
686 | /* This pollchar is probably redundant to the gr_multi_scan | |
687 | below. Trouble is, we can't be sure when or where an | |
688 | error message will appear. Apparently, when running at | |
689 | full speed from a typical sun4, error messages tend to | |
690 | appear to arrive only *after* the s7 record. */ | |
691 | ||
c5aa993b | 692 | if ((x = sr_pollchar ()) != 0) |
c906108c | 693 | { |
c5aa993b JM |
694 | if (sr_get_debug () > 0) |
695 | printf ("\n<retrying...>\n"); | |
c906108c SS |
696 | |
697 | ++retries; | |
698 | ||
699 | /* flush any remaining input and verify that we are back | |
c5aa993b JM |
700 | at the prompt level. */ |
701 | gr_expect_prompt (); | |
c906108c | 702 | /* start all over again. */ |
c5aa993b | 703 | start_load (); |
c906108c SS |
704 | done = 0; |
705 | continue; | |
706 | } | |
707 | ||
708 | done += thisgo; | |
709 | } | |
710 | ||
c5aa993b | 711 | bug_srec_write_cr ("S7060000000000F9"); |
c906108c SS |
712 | ++retries; |
713 | ||
714 | /* Having finished the load, we need to figure out whether we | |
c5aa993b JM |
715 | had any errors. */ |
716 | } | |
717 | while (gr_multi_scan (srecord_strings, 0) == 0);; | |
c906108c | 718 | |
c5aa993b | 719 | return (0); |
c906108c SS |
720 | } |
721 | ||
722 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
723 | to inferior's memory at MEMADDR. Returns errno value. | |
c5aa993b | 724 | * sb/sh instructions don't work on unaligned addresses, when TU=1. |
c906108c SS |
725 | */ |
726 | ||
727 | /* Read LEN bytes from inferior memory at MEMADDR. Put the result | |
728 | at debugger address MYADDR. Returns errno value. */ | |
729 | static int | |
fba45db2 | 730 | bug_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
c906108c SS |
731 | { |
732 | char request[100]; | |
733 | char *buffer; | |
734 | char *p; | |
735 | char type; | |
736 | char size; | |
737 | unsigned char c; | |
738 | unsigned int inaddr; | |
739 | unsigned int checksum; | |
740 | ||
971ff545 | 741 | sprintf (request, "du 0 %lx:&%d", (long) memaddr, len); |
c5aa993b | 742 | sr_write_cr (request); |
c906108c | 743 | |
c5aa993b | 744 | p = buffer = alloca (len); |
c906108c SS |
745 | |
746 | /* scan up through the header */ | |
c5aa993b | 747 | sr_expect ("S0030000FC"); |
c906108c SS |
748 | |
749 | while (p < buffer + len) | |
750 | { | |
751 | /* scan off any white space. */ | |
c5aa993b | 752 | while (sr_readchar () != 'S');; |
c906108c SS |
753 | |
754 | /* what kind of s-rec? */ | |
c5aa993b | 755 | type = sr_readchar (); |
c906108c SS |
756 | |
757 | /* scan record size */ | |
c5aa993b | 758 | sr_get_hex_byte (&size); |
c906108c SS |
759 | checksum = size; |
760 | --size; | |
761 | inaddr = 0; | |
762 | ||
763 | switch (type) | |
764 | { | |
765 | case '7': | |
766 | case '8': | |
767 | case '9': | |
768 | goto done; | |
769 | ||
770 | case '3': | |
c5aa993b | 771 | sr_get_hex_byte (&c); |
c906108c SS |
772 | inaddr = (inaddr << 8) + c; |
773 | checksum += c; | |
774 | --size; | |
775 | /* intentional fall through */ | |
776 | case '2': | |
c5aa993b | 777 | sr_get_hex_byte (&c); |
c906108c SS |
778 | inaddr = (inaddr << 8) + c; |
779 | checksum += c; | |
780 | --size; | |
781 | /* intentional fall through */ | |
782 | case '1': | |
c5aa993b | 783 | sr_get_hex_byte (&c); |
c906108c SS |
784 | inaddr = (inaddr << 8) + c; |
785 | checksum += c; | |
786 | --size; | |
c5aa993b | 787 | sr_get_hex_byte (&c); |
c906108c SS |
788 | inaddr = (inaddr << 8) + c; |
789 | checksum += c; | |
790 | --size; | |
791 | break; | |
792 | ||
793 | default: | |
794 | /* bonk */ | |
c5aa993b | 795 | error ("reading s-records."); |
c906108c SS |
796 | } |
797 | ||
798 | if (inaddr < memaddr | |
799 | || (memaddr + len) < (inaddr + size)) | |
c5aa993b | 800 | error ("srec out of memory range."); |
c906108c SS |
801 | |
802 | if (p != buffer + inaddr - memaddr) | |
c5aa993b | 803 | error ("srec out of sequence."); |
c906108c SS |
804 | |
805 | for (; size; --size, ++p) | |
806 | { | |
c5aa993b | 807 | sr_get_hex_byte (p); |
c906108c SS |
808 | checksum += *p; |
809 | } | |
810 | ||
c5aa993b | 811 | sr_get_hex_byte (&c); |
c906108c | 812 | if (c != (~checksum & 0xff)) |
c5aa993b | 813 | error ("bad s-rec checksum"); |
c906108c SS |
814 | } |
815 | ||
c5aa993b JM |
816 | done: |
817 | gr_expect_prompt (); | |
c906108c | 818 | if (p != buffer + len) |
c5aa993b | 819 | return (1); |
c906108c | 820 | |
c5aa993b JM |
821 | memcpy (myaddr, buffer, len); |
822 | return (0); | |
c906108c SS |
823 | } |
824 | ||
825 | #define MAX_BREAKS 16 | |
826 | static int num_brkpts = 0; | |
69dc947a KB |
827 | |
828 | /* Insert a breakpoint at ADDR. SAVE is normally the address of the | |
829 | pattern buffer where the instruction that the breakpoint overwrites | |
830 | is saved. It is unused here since the bug is responsible for | |
831 | saving/restoring the original instruction. */ | |
832 | ||
c906108c | 833 | static int |
69dc947a | 834 | bug_insert_breakpoint (CORE_ADDR addr, char *save) |
c906108c SS |
835 | { |
836 | sr_check_open (); | |
837 | ||
838 | if (num_brkpts < MAX_BREAKS) | |
839 | { | |
840 | char buffer[100]; | |
841 | ||
842 | num_brkpts++; | |
971ff545 | 843 | sprintf (buffer, "br %lx", (long) addr); |
c906108c SS |
844 | sr_write_cr (buffer); |
845 | gr_expect_prompt (); | |
c5aa993b | 846 | return (0); |
c906108c SS |
847 | } |
848 | else | |
849 | { | |
850 | fprintf_filtered (gdb_stderr, | |
851 | "Too many break points, break point not installed\n"); | |
c5aa993b | 852 | return (1); |
c906108c SS |
853 | } |
854 | ||
855 | } | |
69dc947a KB |
856 | |
857 | /* Remove a breakpoint at ADDR. SAVE is normally the previously | |
858 | saved pattern, but is unused here since the bug is responsible | |
859 | for saving/restoring instructions. */ | |
860 | ||
c906108c | 861 | static int |
69dc947a | 862 | bug_remove_breakpoint (CORE_ADDR addr, char *save) |
c906108c SS |
863 | { |
864 | if (num_brkpts > 0) | |
865 | { | |
866 | char buffer[100]; | |
867 | ||
868 | num_brkpts--; | |
971ff545 | 869 | sprintf (buffer, "nobr %lx", (long) addr); |
c906108c SS |
870 | sr_write_cr (buffer); |
871 | gr_expect_prompt (); | |
872 | ||
873 | } | |
874 | return (0); | |
875 | } | |
876 | ||
877 | /* Clear the bugs notion of what the break points are */ | |
878 | static int | |
fba45db2 | 879 | bug_clear_breakpoints (void) |
c906108c SS |
880 | { |
881 | ||
c5aa993b | 882 | if (sr_is_open ()) |
c906108c SS |
883 | { |
884 | sr_write_cr ("nobr"); | |
c5aa993b | 885 | sr_expect ("nobr"); |
c906108c SS |
886 | gr_expect_prompt (); |
887 | } | |
888 | num_brkpts = 0; | |
c5aa993b | 889 | return (0); |
c906108c SS |
890 | } |
891 | ||
c5aa993b | 892 | struct target_ops bug_ops; |
c906108c | 893 | |
c5aa993b JM |
894 | static void |
895 | init_bug_ops (void) | |
c906108c | 896 | { |
c5aa993b JM |
897 | bug_ops.to_shortname = "bug"; |
898 | "Remote BUG monitor", | |
899 | bug_ops.to_longname = "Use the mvme187 board running the BUG monitor connected by a serial line."; | |
900 | bug_ops.to_doc = " "; | |
901 | bug_ops.to_open = bug_open; | |
902 | bug_ops.to_close = gr_close; | |
903 | bug_ops.to_attach = 0; | |
c906108c SS |
904 | bug_ops.to_post_attach = NULL; |
905 | bug_ops.to_require_attach = NULL; | |
c5aa993b | 906 | bug_ops.to_detach = gr_detach; |
c906108c | 907 | bug_ops.to_require_detach = NULL; |
c5aa993b JM |
908 | bug_ops.to_resume = bug_resume; |
909 | bug_ops.to_wait = bug_wait; | |
c906108c | 910 | bug_ops.to_post_wait = NULL; |
c5aa993b JM |
911 | bug_ops.to_fetch_registers = bug_fetch_register; |
912 | bug_ops.to_store_registers = bug_store_register; | |
913 | bug_ops.to_prepare_to_store = gr_prepare_to_store; | |
914 | bug_ops.to_xfer_memory = bug_xfer_memory; | |
915 | bug_ops.to_files_info = gr_files_info; | |
916 | bug_ops.to_insert_breakpoint = bug_insert_breakpoint; | |
917 | bug_ops.to_remove_breakpoint = bug_remove_breakpoint; | |
918 | bug_ops.to_terminal_init = 0; | |
919 | bug_ops.to_terminal_inferior = 0; | |
920 | bug_ops.to_terminal_ours_for_output = 0; | |
921 | bug_ops.to_terminal_ours = 0; | |
922 | bug_ops.to_terminal_info = 0; | |
923 | bug_ops.to_kill = gr_kill; | |
924 | bug_ops.to_load = bug_load; | |
925 | bug_ops.to_lookup_symbol = 0; | |
926 | bug_ops.to_create_inferior = gr_create_inferior; | |
c906108c SS |
927 | bug_ops.to_post_startup_inferior = NULL; |
928 | bug_ops.to_acknowledge_created_inferior = NULL; | |
c5aa993b JM |
929 | bug_ops.to_clone_and_follow_inferior = NULL; |
930 | bug_ops.to_post_follow_inferior_by_clone = NULL; | |
c906108c SS |
931 | bug_ops.to_insert_fork_catchpoint = NULL; |
932 | bug_ops.to_remove_fork_catchpoint = NULL; | |
933 | bug_ops.to_insert_vfork_catchpoint = NULL; | |
c5aa993b | 934 | bug_ops.to_remove_vfork_catchpoint = NULL; |
c906108c | 935 | bug_ops.to_has_forked = NULL; |
c5aa993b JM |
936 | bug_ops.to_has_vforked = NULL; |
937 | bug_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
c906108c SS |
938 | bug_ops.to_post_follow_vfork = NULL; |
939 | bug_ops.to_insert_exec_catchpoint = NULL; | |
940 | bug_ops.to_remove_exec_catchpoint = NULL; | |
941 | bug_ops.to_has_execd = NULL; | |
942 | bug_ops.to_reported_exec_events_per_exec_call = NULL; | |
943 | bug_ops.to_has_exited = NULL; | |
c5aa993b JM |
944 | bug_ops.to_mourn_inferior = gr_mourn; |
945 | bug_ops.to_can_run = 0; | |
946 | bug_ops.to_notice_signals = 0; | |
947 | bug_ops.to_thread_alive = 0; | |
948 | bug_ops.to_stop = 0; | |
c906108c | 949 | bug_ops.to_pid_to_exec_file = NULL; |
c5aa993b JM |
950 | bug_ops.to_stratum = process_stratum; |
951 | bug_ops.DONT_USE = 0; | |
952 | bug_ops.to_has_all_memory = 1; | |
953 | bug_ops.to_has_memory = 1; | |
954 | bug_ops.to_has_stack = 1; | |
955 | bug_ops.to_has_registers = 0; | |
956 | bug_ops.to_has_execution = 0; | |
957 | bug_ops.to_sections = 0; | |
958 | bug_ops.to_sections_end = 0; | |
959 | bug_ops.to_magic = OPS_MAGIC; /* Always the last thing */ | |
960 | } /* init_bug_ops */ | |
c906108c SS |
961 | |
962 | void | |
fba45db2 | 963 | _initialize_remote_bug (void) |
c906108c | 964 | { |
c5aa993b | 965 | init_bug_ops (); |
c906108c SS |
966 | add_target (&bug_ops); |
967 | ||
968 | add_show_from_set | |
969 | (add_set_cmd ("srec-bytes", class_support, var_uinteger, | |
970 | (char *) &srec_bytes, | |
971 | "\ | |
972 | Set the number of bytes represented in each S-record.\n\ | |
973 | This affects the communication protocol with the remote target.", | |
974 | &setlist), | |
975 | &showlist); | |
976 | ||
977 | add_show_from_set | |
978 | (add_set_cmd ("srec-max-retries", class_support, var_uinteger, | |
979 | (char *) &srec_max_retries, | |
980 | "\ | |
981 | Set the number of retries for shipping S-records.\n\ | |
982 | This affects the communication protocol with the remote target.", | |
983 | &setlist), | |
984 | &showlist); | |
985 | ||
986 | #if 0 | |
987 | /* This needs to set SREC_SIZE, not srec_frame which gets changed at the | |
988 | end of a download. But do we need the option at all? */ | |
989 | add_show_from_set | |
990 | (add_set_cmd ("srec-frame", class_support, var_uinteger, | |
991 | (char *) &srec_frame, | |
992 | "\ | |
993 | Set the number of bytes in an S-record frame.\n\ | |
994 | This affects the communication protocol with the remote target.", | |
995 | &setlist), | |
996 | &showlist); | |
997 | #endif /* 0 */ | |
998 | ||
999 | add_show_from_set | |
1000 | (add_set_cmd ("srec-noise", class_support, var_zinteger, | |
1001 | (char *) &srec_noise, | |
1002 | "\ | |
1003 | Set number of S-record to send before deliberately flubbing a checksum.\n\ | |
1004 | Zero means flub none at all. This affects the communication protocol\n\ | |
1005 | with the remote target.", | |
1006 | &setlist), | |
1007 | &showlist); | |
1008 | ||
1009 | add_show_from_set | |
1010 | (add_set_cmd ("srec-sleep", class_support, var_zinteger, | |
1011 | (char *) &srec_sleep, | |
1012 | "\ | |
1013 | Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\ | |
1014 | This affects the communication protocol with the remote target.", | |
1015 | &setlist), | |
1016 | &showlist); | |
1017 | ||
1018 | add_show_from_set | |
1019 | (add_set_cmd ("srec-echo-pace", class_support, var_boolean, | |
1020 | (char *) &srec_echo_pace, | |
1021 | "\ | |
1022 | Set echo-verification.\n\ | |
1023 | When on, use verification by echo when downloading S-records. This is\n\ | |
c5aa993b | 1024 | much slower, but generally more reliable.", |
c906108c SS |
1025 | &setlist), |
1026 | &showlist); | |
1027 | } |