* remote-nindy.c (nindy_fetch_word, nindy_store_word): Removed
[deliverable/binutils-gdb.git] / gdb / remote-bug.c
1 /* Remote debugging interface for Motorola's MVME187BUG monitor, an embedded
2 monitor for the m88k.
3
4 Copyright 1992, 1993 Free Software Foundation, Inc.
5 Contributed by Cygnus Support. Written by K. Richard Pixley.
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
23
24 #include "defs.h"
25 #include "inferior.h"
26 #include "gdb_wait.h"
27
28 #include "gdb_string.h"
29 #include <ctype.h>
30 #include <fcntl.h>
31 #include <signal.h>
32 #include <setjmp.h>
33 #include <errno.h>
34
35 #include "terminal.h"
36 #include "gdbcore.h"
37 #include "gdbcmd.h"
38
39 #include "remote-utils.h"
40
41
42 extern int sleep ();
43
44 /* External data declarations */
45 extern int stop_soon_quietly; /* for wait_for_inferior */
46
47 /* Forward data declarations */
48 extern struct target_ops bug_ops; /* Forward declaration */
49
50 /* Forward function declarations */
51 static int bug_clear_breakpoints (void);
52
53 static int bug_read_memory (CORE_ADDR memaddr,
54 unsigned char *myaddr, int len);
55
56 static int bug_write_memory (CORE_ADDR memaddr,
57 unsigned char *myaddr, int len);
58
59 /* This variable is somewhat arbitrary. It's here so that it can be
60 set from within a running gdb. */
61
62 static int srec_max_retries = 3;
63
64 /* Each S-record download to the target consists of an S0 header
65 record, some number of S3 data records, and one S7 termination
66 record. I call this download a "frame". Srec_frame says how many
67 bytes will be represented in each frame. */
68
69 #define SREC_SIZE 160
70 static int srec_frame = SREC_SIZE;
71
72 /* This variable determines how many bytes will be represented in each
73 S3 s-record. */
74
75 static int srec_bytes = 40;
76
77 /* At one point it appeared to me as though the bug monitor could not
78 really be expected to receive two sequential characters at 9600
79 baud reliably. Echo-pacing is an attempt to force data across the
80 line even in this condition. Specifically, in echo-pace mode, each
81 character is sent one at a time and we look for the echo before
82 sending the next. This is excruciatingly slow. */
83
84 static int srec_echo_pace = 0;
85
86 /* How long to wait after an srec for a possible error message.
87 Similar to the above, I tried sleeping after sending each S3 record
88 in hopes that I might actually see error messages from the bug
89 monitor. This might actually work if we were to use sleep
90 intervals smaller than 1 second. */
91
92 static int srec_sleep = 0;
93
94 /* Every srec_noise records, flub the checksum. This is a debugging
95 feature. Set the variable to something other than 1 in order to
96 inject *deliberate* checksum errors. One might do this if one
97 wanted to test error handling and recovery. */
98
99 static int srec_noise = 0;
100
101 /* Called when SIGALRM signal sent due to alarm() timeout. */
102
103 /* Number of SIGTRAPs we need to simulate. That is, the next
104 NEED_ARTIFICIAL_TRAP calls to bug_wait should just return
105 SIGTRAP without actually waiting for anything. */
106
107 static int need_artificial_trap = 0;
108
109 /*
110 * Download a file specified in 'args', to the bug.
111 */
112
113 static void
114 bug_load (args, fromtty)
115 char *args;
116 int fromtty;
117 {
118 bfd *abfd;
119 asection *s;
120 char buffer[1024];
121
122 sr_check_open ();
123
124 dcache_flush (gr_get_dcache ());
125 inferior_pid = 0;
126 abfd = bfd_openr (args, 0);
127 if (!abfd)
128 {
129 printf_filtered ("Unable to open file %s\n", args);
130 return;
131 }
132
133 if (bfd_check_format (abfd, bfd_object) == 0)
134 {
135 printf_filtered ("File is not an object file\n");
136 return;
137 }
138
139 s = abfd->sections;
140 while (s != (asection *) NULL)
141 {
142 srec_frame = SREC_SIZE;
143 if (s->flags & SEC_LOAD)
144 {
145 int i;
146
147 char *buffer = xmalloc (srec_frame);
148
149 printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, s->vma + s->_raw_size);
150 gdb_flush (gdb_stdout);
151 for (i = 0; i < s->_raw_size; i += srec_frame)
152 {
153 if (srec_frame > s->_raw_size - i)
154 srec_frame = s->_raw_size - i;
155
156 bfd_get_section_contents (abfd, s, buffer, i, srec_frame);
157 bug_write_memory (s->vma + i, buffer, srec_frame);
158 printf_filtered ("*");
159 gdb_flush (gdb_stdout);
160 }
161 printf_filtered ("\n");
162 free (buffer);
163 }
164 s = s->next;
165 }
166 sprintf (buffer, "rs ip %lx", (unsigned long) abfd->start_address);
167 sr_write_cr (buffer);
168 gr_expect_prompt ();
169 }
170
171 #if 0
172 static char *
173 get_word (p)
174 char **p;
175 {
176 char *s = *p;
177 char *word;
178 char *copy;
179 size_t len;
180
181 while (isspace (*s))
182 s++;
183
184 word = s;
185
186 len = 0;
187
188 while (*s && !isspace (*s))
189 {
190 s++;
191 len++;
192
193 }
194 copy = xmalloc (len + 1);
195 memcpy (copy, word, len);
196 copy[len] = 0;
197 *p = s;
198 return copy;
199 }
200 #endif
201
202 static struct gr_settings bug_settings =
203 {
204 NULL, /* dcache */
205 "Bug>", /* prompt */
206 &bug_ops, /* ops */
207 bug_clear_breakpoints, /* clear_all_breakpoints */
208 bug_read_memory, /* readfunc */
209 bug_write_memory, /* writefunc */
210 gr_generic_checkin, /* checkin */
211 };
212
213 static char *cpu_check_strings[] =
214 {
215 "=",
216 "Invalid Register",
217 };
218
219 static void
220 bug_open (args, from_tty)
221 char *args;
222 int from_tty;
223 {
224 if (args == NULL)
225 args = "";
226
227 gr_open (args, from_tty, &bug_settings);
228 /* decide *now* whether we are on an 88100 or an 88110 */
229 sr_write_cr ("rs cr06");
230 sr_expect ("rs cr06");
231
232 switch (gr_multi_scan (cpu_check_strings, 0))
233 {
234 case 0: /* this is an m88100 */
235 target_is_m88110 = 0;
236 break;
237 case 1: /* this is an m88110 */
238 target_is_m88110 = 1;
239 break;
240 default:
241 abort ();
242 }
243 }
244
245 /* Tell the remote machine to resume. */
246
247 void
248 bug_resume (pid, step, sig)
249 int pid, step;
250 enum target_signal sig;
251 {
252 dcache_flush (gr_get_dcache ());
253
254 if (step)
255 {
256 sr_write_cr ("t");
257
258 /* Force the next bug_wait to return a trap. Not doing anything
259 about I/O from the target means that the user has to type
260 "continue" to see any. FIXME, this should be fixed. */
261 need_artificial_trap = 1;
262 }
263 else
264 sr_write_cr ("g");
265
266 return;
267 }
268
269 /* Wait until the remote machine stops, then return,
270 storing status in STATUS just as `wait' would. */
271
272 static char *wait_strings[] =
273 {
274 "At Breakpoint",
275 "Exception: Data Access Fault (Local Bus Timeout)",
276 "\r8??\?-Bug>", /* The '\?' avoids creating a trigraph */
277 "\r197-Bug>",
278 NULL,
279 };
280
281 int
282 bug_wait (pid, status)
283 int pid;
284 struct target_waitstatus *status;
285 {
286 int old_timeout = sr_get_timeout ();
287 int old_immediate_quit = immediate_quit;
288
289 status->kind = TARGET_WAITKIND_EXITED;
290 status->value.integer = 0;
291
292 /* read off leftovers from resume so that the rest can be passed
293 back out as stdout. */
294 if (need_artificial_trap == 0)
295 {
296 sr_expect ("Effective address: ");
297 (void) sr_get_hex_word ();
298 sr_expect ("\r\n");
299 }
300
301 sr_set_timeout (-1); /* Don't time out -- user program is running. */
302 immediate_quit = 1; /* Helps ability to QUIT */
303
304 switch (gr_multi_scan (wait_strings, need_artificial_trap == 0))
305 {
306 case 0: /* breakpoint case */
307 status->kind = TARGET_WAITKIND_STOPPED;
308 status->value.sig = TARGET_SIGNAL_TRAP;
309 /* user output from the target can be discarded here. (?) */
310 gr_expect_prompt ();
311 break;
312
313 case 1: /* bus error */
314 status->kind = TARGET_WAITKIND_STOPPED;
315 status->value.sig = TARGET_SIGNAL_BUS;
316 /* user output from the target can be discarded here. (?) */
317 gr_expect_prompt ();
318 break;
319
320 case 2: /* normal case */
321 case 3:
322 if (need_artificial_trap != 0)
323 {
324 /* stepping */
325 status->kind = TARGET_WAITKIND_STOPPED;
326 status->value.sig = TARGET_SIGNAL_TRAP;
327 need_artificial_trap--;
328 break;
329 }
330 else
331 {
332 /* exit case */
333 status->kind = TARGET_WAITKIND_EXITED;
334 status->value.integer = 0;
335 break;
336 }
337
338 case -1: /* trouble */
339 default:
340 fprintf_filtered (gdb_stderr,
341 "Trouble reading target during wait\n");
342 break;
343 }
344
345 sr_set_timeout (old_timeout);
346 immediate_quit = old_immediate_quit;
347 return 0;
348 }
349
350 /* Return the name of register number REGNO
351 in the form input and output by bug.
352
353 Returns a pointer to a static buffer containing the answer. */
354 static char *
355 get_reg_name (regno)
356 int regno;
357 {
358 static char *rn[] =
359 {
360 "r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07",
361 "r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15",
362 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
363 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
364
365 /* these get confusing because we omit a few and switch some ordering around. */
366
367 "cr01", /* 32 = psr */
368 "fcr62", /* 33 = fpsr */
369 "fcr63", /* 34 = fpcr */
370 "ip", /* this is something of a cheat. */
371 /* 35 = sxip */
372 "cr05", /* 36 = snip */
373 "cr06", /* 37 = sfip */
374
375 "x00", "x01", "x02", "x03", "x04", "x05", "x06", "x07",
376 "x08", "x09", "x10", "x11", "x12", "x13", "x14", "x15",
377 "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23",
378 "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31",
379 };
380
381 return rn[regno];
382 }
383
384 #if 0 /* not currently used */
385 /* Read from remote while the input matches STRING. Return zero on
386 success, -1 on failure. */
387
388 static int
389 bug_scan (s)
390 char *s;
391 {
392 int c;
393
394 while (*s)
395 {
396 c = sr_readchar ();
397 if (c != *s++)
398 {
399 fflush (stdout);
400 printf ("\nNext character is '%c' - %d and s is \"%s\".\n", c, c, --s);
401 return (-1);
402 }
403 }
404
405 return (0);
406 }
407 #endif /* never */
408
409 static int
410 bug_srec_write_cr (s)
411 char *s;
412 {
413 char *p = s;
414
415 if (srec_echo_pace)
416 for (p = s; *p; ++p)
417 {
418 if (sr_get_debug () > 0)
419 printf ("%c", *p);
420
421 do
422 SERIAL_WRITE (sr_get_desc (), p, 1);
423 while (sr_pollchar () != *p);
424 }
425 else
426 {
427 sr_write_cr (s);
428 /* return(bug_scan (s) || bug_scan ("\n")); */
429 }
430
431 return (0);
432 }
433
434 /* Store register REGNO, or all if REGNO == -1. */
435
436 static void
437 bug_fetch_register (regno)
438 int regno;
439 {
440 sr_check_open ();
441
442 if (regno == -1)
443 {
444 int i;
445
446 for (i = 0; i < NUM_REGS; ++i)
447 bug_fetch_register (i);
448 }
449 else if (target_is_m88110 && regno == SFIP_REGNUM)
450 {
451 /* m88110 has no sfip. */
452 long l = 0;
453 supply_register (regno, (char *) &l);
454 }
455 else if (regno < XFP_REGNUM)
456 {
457 char buffer[MAX_REGISTER_RAW_SIZE];
458
459 sr_write ("rs ", 3);
460 sr_write_cr (get_reg_name (regno));
461 sr_expect ("=");
462 store_unsigned_integer (buffer, REGISTER_RAW_SIZE (regno),
463 sr_get_hex_word ());
464 gr_expect_prompt ();
465 supply_register (regno, buffer);
466 }
467 else
468 {
469 /* Float register so we need to parse a strange data format. */
470 long p;
471 unsigned char fpreg_buf[10];
472
473 sr_write ("rs ", 3);
474 sr_write (get_reg_name (regno), strlen (get_reg_name (regno)));
475 sr_write_cr (";d");
476 sr_expect ("rs");
477 sr_expect (get_reg_name (regno));
478 sr_expect (";d");
479 sr_expect ("=");
480
481 /* sign */
482 p = sr_get_hex_digit (1);
483 fpreg_buf[0] = p << 7;
484
485 /* exponent */
486 sr_expect ("_");
487 p = sr_get_hex_digit (1);
488 fpreg_buf[0] += (p << 4);
489 fpreg_buf[0] += sr_get_hex_digit (1);
490
491 fpreg_buf[1] = sr_get_hex_digit (1) << 4;
492
493 /* fraction */
494 sr_expect ("_");
495 fpreg_buf[1] += sr_get_hex_digit (1);
496
497 fpreg_buf[2] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
498 fpreg_buf[3] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
499 fpreg_buf[4] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
500 fpreg_buf[5] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
501 fpreg_buf[6] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
502 fpreg_buf[7] = (sr_get_hex_digit (1) << 4) + sr_get_hex_digit (1);
503 fpreg_buf[8] = 0;
504 fpreg_buf[9] = 0;
505
506 gr_expect_prompt ();
507 supply_register (regno, fpreg_buf);
508 }
509
510 return;
511 }
512
513 /* Store register REGNO, or all if REGNO == -1. */
514
515 static void
516 bug_store_register (regno)
517 int regno;
518 {
519 char buffer[1024];
520 sr_check_open ();
521
522 if (regno == -1)
523 {
524 int i;
525
526 for (i = 0; i < NUM_REGS; ++i)
527 bug_store_register (i);
528 }
529 else
530 {
531 char *regname;
532
533 regname = get_reg_name (regno);
534
535 if (target_is_m88110 && regno == SFIP_REGNUM)
536 return;
537 else if (regno < XFP_REGNUM)
538 sprintf (buffer, "rs %s %08x",
539 regname,
540 read_register (regno));
541 else
542 {
543 unsigned char *fpreg_buf =
544 (unsigned char *) &registers[REGISTER_BYTE (regno)];
545
546 sprintf (buffer, "rs %s %1x_%02x%1x_%1x%02x%02x%02x%02x%02x%02x;d",
547 regname,
548 /* sign */
549 (fpreg_buf[0] >> 7) & 0xf,
550 /* exponent */
551 fpreg_buf[0] & 0x7f,
552 (fpreg_buf[1] >> 8) & 0xf,
553 /* fraction */
554 fpreg_buf[1] & 0xf,
555 fpreg_buf[2],
556 fpreg_buf[3],
557 fpreg_buf[4],
558 fpreg_buf[5],
559 fpreg_buf[6],
560 fpreg_buf[7]);
561 }
562
563 sr_write_cr (buffer);
564 gr_expect_prompt ();
565 }
566
567 return;
568 }
569
570 int
571 bug_xfer_memory (memaddr, myaddr, len, write, target)
572 CORE_ADDR memaddr;
573 char *myaddr;
574 int len;
575 int write;
576 struct target_ops *target; /* ignored */
577 {
578 if (len <= 0)
579 return 0;
580
581 return dcache_xfer_memory (gr_get_dcache (), memaddr, myaddr, len, write);
582 }
583
584 static void
585 start_load ()
586 {
587 char *command;
588
589 command = (srec_echo_pace ? "lo 0 ;x" : "lo 0");
590
591 sr_write_cr (command);
592 sr_expect (command);
593 sr_expect ("\r\n");
594 bug_srec_write_cr ("S0030000FC");
595 return;
596 }
597
598 /* This is an extremely vulnerable and fragile function. I've made
599 considerable attempts to make this deterministic, but I've
600 certainly forgotten something. The trouble is that S-records are
601 only a partial file format, not a protocol. Worse, apparently the
602 m88k bug monitor does not run in real time while receiving
603 S-records. Hence, we must pay excruciating attention to when and
604 where error messages are returned, and what has actually been sent.
605
606 Each call represents a chunk of memory to be sent to the target.
607 We break that chunk into an S0 header record, some number of S3
608 data records each containing srec_bytes, and an S7 termination
609 record. */
610
611 static char *srecord_strings[] =
612 {
613 "S-RECORD",
614 "-Bug>",
615 NULL,
616 };
617
618 static int
619 bug_write_memory (memaddr, myaddr, len)
620 CORE_ADDR memaddr;
621 unsigned char *myaddr;
622 int len;
623 {
624 int done;
625 int checksum;
626 int x;
627 int retries;
628 char *buffer = alloca ((srec_bytes + 8) << 1);
629
630 retries = 0;
631
632 do
633 {
634 done = 0;
635
636 if (retries > srec_max_retries)
637 return (-1);
638
639 if (retries > 0)
640 {
641 if (sr_get_debug () > 0)
642 printf ("\n<retrying...>\n");
643
644 /* This gr_expect_prompt call is extremely important. Without
645 it, we will tend to resend our packet so fast that it
646 will arrive before the bug monitor is ready to receive
647 it. This would lead to a very ugly resend loop. */
648
649 gr_expect_prompt ();
650 }
651
652 start_load ();
653
654 while (done < len)
655 {
656 int thisgo;
657 int idx;
658 char *buf = buffer;
659 CORE_ADDR address;
660
661 checksum = 0;
662 thisgo = len - done;
663 if (thisgo > srec_bytes)
664 thisgo = srec_bytes;
665
666 address = memaddr + done;
667 sprintf (buf, "S3%02X%08X", thisgo + 4 + 1, address);
668 buf += 12;
669
670 checksum += (thisgo + 4 + 1
671 + (address & 0xff)
672 + ((address >> 8) & 0xff)
673 + ((address >> 16) & 0xff)
674 + ((address >> 24) & 0xff));
675
676 for (idx = 0; idx < thisgo; idx++)
677 {
678 sprintf (buf, "%02X", myaddr[idx + done]);
679 checksum += myaddr[idx + done];
680 buf += 2;
681 }
682
683 if (srec_noise > 0)
684 {
685 /* FIXME-NOW: insert a deliberate error every now and then.
686 This is intended for testing/debugging the error handling
687 stuff. */
688 static int counter = 0;
689 if (++counter > srec_noise)
690 {
691 counter = 0;
692 ++checksum;
693 }
694 }
695
696 sprintf (buf, "%02X", ~checksum & 0xff);
697 bug_srec_write_cr (buffer);
698
699 if (srec_sleep != 0)
700 sleep (srec_sleep);
701
702 /* This pollchar is probably redundant to the gr_multi_scan
703 below. Trouble is, we can't be sure when or where an
704 error message will appear. Apparently, when running at
705 full speed from a typical sun4, error messages tend to
706 appear to arrive only *after* the s7 record. */
707
708 if ((x = sr_pollchar ()) != 0)
709 {
710 if (sr_get_debug () > 0)
711 printf ("\n<retrying...>\n");
712
713 ++retries;
714
715 /* flush any remaining input and verify that we are back
716 at the prompt level. */
717 gr_expect_prompt ();
718 /* start all over again. */
719 start_load ();
720 done = 0;
721 continue;
722 }
723
724 done += thisgo;
725 }
726
727 bug_srec_write_cr ("S7060000000000F9");
728 ++retries;
729
730 /* Having finished the load, we need to figure out whether we
731 had any errors. */
732 }
733 while (gr_multi_scan (srecord_strings, 0) == 0);;
734
735 return (0);
736 }
737
738 /* Copy LEN bytes of data from debugger memory at MYADDR
739 to inferior's memory at MEMADDR. Returns errno value.
740 * sb/sh instructions don't work on unaligned addresses, when TU=1.
741 */
742
743 /* Read LEN bytes from inferior memory at MEMADDR. Put the result
744 at debugger address MYADDR. Returns errno value. */
745 static int
746 bug_read_memory (memaddr, myaddr, len)
747 CORE_ADDR memaddr;
748 unsigned char *myaddr;
749 int len;
750 {
751 char request[100];
752 char *buffer;
753 char *p;
754 char type;
755 char size;
756 unsigned char c;
757 unsigned int inaddr;
758 unsigned int checksum;
759
760 sprintf (request, "du 0 %x:&%d", memaddr, len);
761 sr_write_cr (request);
762
763 p = buffer = alloca (len);
764
765 /* scan up through the header */
766 sr_expect ("S0030000FC");
767
768 while (p < buffer + len)
769 {
770 /* scan off any white space. */
771 while (sr_readchar () != 'S');;
772
773 /* what kind of s-rec? */
774 type = sr_readchar ();
775
776 /* scan record size */
777 sr_get_hex_byte (&size);
778 checksum = size;
779 --size;
780 inaddr = 0;
781
782 switch (type)
783 {
784 case '7':
785 case '8':
786 case '9':
787 goto done;
788
789 case '3':
790 sr_get_hex_byte (&c);
791 inaddr = (inaddr << 8) + c;
792 checksum += c;
793 --size;
794 /* intentional fall through */
795 case '2':
796 sr_get_hex_byte (&c);
797 inaddr = (inaddr << 8) + c;
798 checksum += c;
799 --size;
800 /* intentional fall through */
801 case '1':
802 sr_get_hex_byte (&c);
803 inaddr = (inaddr << 8) + c;
804 checksum += c;
805 --size;
806 sr_get_hex_byte (&c);
807 inaddr = (inaddr << 8) + c;
808 checksum += c;
809 --size;
810 break;
811
812 default:
813 /* bonk */
814 error ("reading s-records.");
815 }
816
817 if (inaddr < memaddr
818 || (memaddr + len) < (inaddr + size))
819 error ("srec out of memory range.");
820
821 if (p != buffer + inaddr - memaddr)
822 error ("srec out of sequence.");
823
824 for (; size; --size, ++p)
825 {
826 sr_get_hex_byte (p);
827 checksum += *p;
828 }
829
830 sr_get_hex_byte (&c);
831 if (c != (~checksum & 0xff))
832 error ("bad s-rec checksum");
833 }
834
835 done:
836 gr_expect_prompt ();
837 if (p != buffer + len)
838 return (1);
839
840 memcpy (myaddr, buffer, len);
841 return (0);
842 }
843
844 #define MAX_BREAKS 16
845 static int num_brkpts = 0;
846 static int
847 bug_insert_breakpoint (addr, save)
848 CORE_ADDR addr;
849 char *save; /* Throw away, let bug save instructions */
850 {
851 sr_check_open ();
852
853 if (num_brkpts < MAX_BREAKS)
854 {
855 char buffer[100];
856
857 num_brkpts++;
858 sprintf (buffer, "br %x", addr);
859 sr_write_cr (buffer);
860 gr_expect_prompt ();
861 return (0);
862 }
863 else
864 {
865 fprintf_filtered (gdb_stderr,
866 "Too many break points, break point not installed\n");
867 return (1);
868 }
869
870 }
871 static int
872 bug_remove_breakpoint (addr, save)
873 CORE_ADDR addr;
874 char *save; /* Throw away, let bug save instructions */
875 {
876 if (num_brkpts > 0)
877 {
878 char buffer[100];
879
880 num_brkpts--;
881 sprintf (buffer, "nobr %x", addr);
882 sr_write_cr (buffer);
883 gr_expect_prompt ();
884
885 }
886 return (0);
887 }
888
889 /* Clear the bugs notion of what the break points are */
890 static int
891 bug_clear_breakpoints ()
892 {
893
894 if (sr_is_open ())
895 {
896 sr_write_cr ("nobr");
897 sr_expect ("nobr");
898 gr_expect_prompt ();
899 }
900 num_brkpts = 0;
901 return (0);
902 }
903
904 struct target_ops bug_ops;
905
906 static void
907 init_bug_ops (void)
908 {
909 bug_ops.to_shortname = "bug";
910 "Remote BUG monitor",
911 bug_ops.to_longname = "Use the mvme187 board running the BUG monitor connected by a serial line.";
912 bug_ops.to_doc = " ";
913 bug_ops.to_open = bug_open;
914 bug_ops.to_close = gr_close;
915 bug_ops.to_attach = 0;
916 bug_ops.to_post_attach = NULL;
917 bug_ops.to_require_attach = NULL;
918 bug_ops.to_detach = gr_detach;
919 bug_ops.to_require_detach = NULL;
920 bug_ops.to_resume = bug_resume;
921 bug_ops.to_wait = bug_wait;
922 bug_ops.to_post_wait = NULL;
923 bug_ops.to_fetch_registers = bug_fetch_register;
924 bug_ops.to_store_registers = bug_store_register;
925 bug_ops.to_prepare_to_store = gr_prepare_to_store;
926 bug_ops.to_xfer_memory = bug_xfer_memory;
927 bug_ops.to_files_info = gr_files_info;
928 bug_ops.to_insert_breakpoint = bug_insert_breakpoint;
929 bug_ops.to_remove_breakpoint = bug_remove_breakpoint;
930 bug_ops.to_terminal_init = 0;
931 bug_ops.to_terminal_inferior = 0;
932 bug_ops.to_terminal_ours_for_output = 0;
933 bug_ops.to_terminal_ours = 0;
934 bug_ops.to_terminal_info = 0;
935 bug_ops.to_kill = gr_kill;
936 bug_ops.to_load = bug_load;
937 bug_ops.to_lookup_symbol = 0;
938 bug_ops.to_create_inferior = gr_create_inferior;
939 bug_ops.to_post_startup_inferior = NULL;
940 bug_ops.to_acknowledge_created_inferior = NULL;
941 bug_ops.to_clone_and_follow_inferior = NULL;
942 bug_ops.to_post_follow_inferior_by_clone = NULL;
943 bug_ops.to_insert_fork_catchpoint = NULL;
944 bug_ops.to_remove_fork_catchpoint = NULL;
945 bug_ops.to_insert_vfork_catchpoint = NULL;
946 bug_ops.to_remove_vfork_catchpoint = NULL;
947 bug_ops.to_has_forked = NULL;
948 bug_ops.to_has_vforked = NULL;
949 bug_ops.to_can_follow_vfork_prior_to_exec = NULL;
950 bug_ops.to_post_follow_vfork = NULL;
951 bug_ops.to_insert_exec_catchpoint = NULL;
952 bug_ops.to_remove_exec_catchpoint = NULL;
953 bug_ops.to_has_execd = NULL;
954 bug_ops.to_reported_exec_events_per_exec_call = NULL;
955 bug_ops.to_has_exited = NULL;
956 bug_ops.to_mourn_inferior = gr_mourn;
957 bug_ops.to_can_run = 0;
958 bug_ops.to_notice_signals = 0;
959 bug_ops.to_thread_alive = 0;
960 bug_ops.to_stop = 0;
961 bug_ops.to_pid_to_exec_file = NULL;
962 bug_ops.to_core_file_to_sym_file = NULL;
963 bug_ops.to_stratum = process_stratum;
964 bug_ops.DONT_USE = 0;
965 bug_ops.to_has_all_memory = 1;
966 bug_ops.to_has_memory = 1;
967 bug_ops.to_has_stack = 1;
968 bug_ops.to_has_registers = 0;
969 bug_ops.to_has_execution = 0;
970 bug_ops.to_sections = 0;
971 bug_ops.to_sections_end = 0;
972 bug_ops.to_magic = OPS_MAGIC; /* Always the last thing */
973 } /* init_bug_ops */
974
975 void
976 _initialize_remote_bug ()
977 {
978 init_bug_ops ();
979 add_target (&bug_ops);
980
981 add_show_from_set
982 (add_set_cmd ("srec-bytes", class_support, var_uinteger,
983 (char *) &srec_bytes,
984 "\
985 Set the number of bytes represented in each S-record.\n\
986 This affects the communication protocol with the remote target.",
987 &setlist),
988 &showlist);
989
990 add_show_from_set
991 (add_set_cmd ("srec-max-retries", class_support, var_uinteger,
992 (char *) &srec_max_retries,
993 "\
994 Set the number of retries for shipping S-records.\n\
995 This affects the communication protocol with the remote target.",
996 &setlist),
997 &showlist);
998
999 #if 0
1000 /* This needs to set SREC_SIZE, not srec_frame which gets changed at the
1001 end of a download. But do we need the option at all? */
1002 add_show_from_set
1003 (add_set_cmd ("srec-frame", class_support, var_uinteger,
1004 (char *) &srec_frame,
1005 "\
1006 Set the number of bytes in an S-record frame.\n\
1007 This affects the communication protocol with the remote target.",
1008 &setlist),
1009 &showlist);
1010 #endif /* 0 */
1011
1012 add_show_from_set
1013 (add_set_cmd ("srec-noise", class_support, var_zinteger,
1014 (char *) &srec_noise,
1015 "\
1016 Set number of S-record to send before deliberately flubbing a checksum.\n\
1017 Zero means flub none at all. This affects the communication protocol\n\
1018 with the remote target.",
1019 &setlist),
1020 &showlist);
1021
1022 add_show_from_set
1023 (add_set_cmd ("srec-sleep", class_support, var_zinteger,
1024 (char *) &srec_sleep,
1025 "\
1026 Set number of seconds to sleep after an S-record for a possible error message to arrive.\n\
1027 This affects the communication protocol with the remote target.",
1028 &setlist),
1029 &showlist);
1030
1031 add_show_from_set
1032 (add_set_cmd ("srec-echo-pace", class_support, var_boolean,
1033 (char *) &srec_echo_pace,
1034 "\
1035 Set echo-verification.\n\
1036 When on, use verification by echo when downloading S-records. This is\n\
1037 much slower, but generally more reliable.",
1038 &setlist),
1039 &showlist);
1040 }
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