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