1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
|
/* Remote debugging interface for boot monitors, for GDB.
Copyright 1990, 1991, 1992, 1993, 1995, 1996, 1997
Free Software Foundation, Inc.
Contributed by Cygnus Support. Written by Rob Savoye for Cygnus.
Resurrected from the ashes by Stu Grossman.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This file was derived from various remote-* modules. It is a collection
of generic support functions so GDB can talk directly to a ROM based
monitor. This saves use from having to hack an exception based handler
into existance, and makes for quick porting.
This module talks to a debug monitor called 'MONITOR', which
We communicate with MONITOR via either a direct serial line, or a TCP
(or possibly TELNET) stream to a terminal multiplexor,
which in turn talks to the target board. */
/* FIXME 32x64: This code assumes that registers and addresses are at
most 32 bits long. If they can be larger, you will need to declare
values as LONGEST and use %llx or some such to print values when
building commands to send to the monitor. Since we don't know of
any actual 64-bit targets with ROM monitors that use this code,
it's not an issue right now. -sts 4/18/96 */
#include "defs.h"
#include "gdbcore.h"
#include "target.h"
#include "wait.h"
#ifdef ANSI_PROTOTYPES
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <signal.h>
#include <ctype.h>
#include "gdb_string.h"
#include <sys/types.h>
#include "command.h"
#include "serial.h"
#include "monitor.h"
#include "gdbcmd.h"
#include "inferior.h"
#include "gnu-regex.h"
#include "dcache.h"
#include "srec.h"
static char *dev_name;
static struct target_ops *targ_ops;
static int readchar PARAMS ((int timeout));
static void monitor_command PARAMS ((char *args, int fromtty));
static void monitor_fetch_register PARAMS ((int regno));
static void monitor_store_register PARAMS ((int regno));
static void monitor_detach PARAMS ((char *args, int from_tty));
static void monitor_resume PARAMS ((int pid, int step, enum target_signal sig));
static void monitor_interrupt PARAMS ((int signo));
static void monitor_interrupt_twice PARAMS ((int signo));
static void monitor_interrupt_query PARAMS ((void));
static void monitor_wait_cleanup PARAMS ((int old_timeout));
static int monitor_wait PARAMS ((int pid, struct target_waitstatus *status));
static void monitor_fetch_registers PARAMS ((int regno));
static void monitor_store_registers PARAMS ((int regno));
static void monitor_prepare_to_store PARAMS ((void));
static int monitor_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, int write, struct target_ops *target));
static void monitor_files_info PARAMS ((struct target_ops *ops));
static int monitor_insert_breakpoint PARAMS ((CORE_ADDR addr, char *shadow));
static int monitor_remove_breakpoint PARAMS ((CORE_ADDR addr, char *shadow));
static void monitor_kill PARAMS ((void));
static void monitor_load PARAMS ((char *file, int from_tty));
static void monitor_mourn_inferior PARAMS ((void));
static void monitor_stop PARAMS ((void));
static int monitor_read_memory PARAMS ((CORE_ADDR addr, char *myaddr,int len));
static int monitor_write_memory PARAMS ((CORE_ADDR addr, char *myaddr,int len));
static int monitor_expect_regexp PARAMS ((struct re_pattern_buffer *pat,
char *buf, int buflen));
#if 0
static int from_hex PARAMS ((int a));
static unsigned long get_hex_word PARAMS ((void));
#endif
static void parse_register_dump PARAMS ((char *, int));
static struct monitor_ops *current_monitor;
static int hashmark; /* flag set by "set hash" */
static int timeout = 30;
static int in_monitor_wait = 0; /* Non-zero means we are in monitor_wait() */
static void (*ofunc)(); /* Old SIGINT signal handler */
/* Descriptor for I/O to remote machine. Initialize it to NULL so
that monitor_open knows that we don't have a file open when the
program starts. */
static serial_t monitor_desc = NULL;
/* Pointer to regexp pattern matching data */
static struct re_pattern_buffer register_pattern;
static char register_fastmap[256];
static struct re_pattern_buffer getmem_resp_delim_pattern;
static char getmem_resp_delim_fastmap[256];
static int dump_reg_flag; /* Non-zero means do a dump_registers cmd when
monitor_wait wakes up. */
static DCACHE *remote_dcache;
static int first_time=0; /* is this the first time we're executing after
gaving created the child proccess? */
/* Convert hex digit A to a number. */
static int
fromhex (a)
int a;
{
if (a >= '0' && a <= '9')
return a - '0';
else if (a >= 'a' && a <= 'f')
return a - 'a' + 10;
else
error ("Invalid hex digit %d", a);
}
/* monitor_printf_noecho -- Send data to monitor, but don't expect an echo.
Works just like printf. */
void
#ifdef ANSI_PROTOTYPES
monitor_printf_noecho (char *pattern, ...)
#else
monitor_printf_noecho (va_alist)
va_dcl
#endif
{
va_list args;
char sndbuf[2000];
int len;
#if ANSI_PROTOTYPES
va_start (args, pattern);
#else
char *pattern;
va_start (args);
pattern = va_arg (args, char *);
#endif
vsprintf (sndbuf, pattern, args);
if (remote_debug > 0)
puts_debug ("sent -->", sndbuf, "<--");
len = strlen (sndbuf);
if (len + 1 > sizeof sndbuf)
abort ();
if (SERIAL_WRITE(monitor_desc, sndbuf, len))
fprintf_unfiltered (stderr, "SERIAL_WRITE failed: %s\n", safe_strerror (errno));
}
/* monitor_printf -- Send data to monitor and check the echo. Works just like
printf. */
void
#ifdef ANSI_PROTOTYPES
monitor_printf (char *pattern, ...)
#else
monitor_printf (va_alist)
va_dcl
#endif
{
va_list args;
char sndbuf[2000];
int len;
#ifdef ANSI_PROTOTYPES
va_start (args, pattern);
#else
char *pattern;
va_start (args);
pattern = va_arg (args, char *);
#endif
vsprintf (sndbuf, pattern, args);
if (remote_debug > 0)
puts_debug ("sent -->", sndbuf, "<--");
len = strlen (sndbuf);
if (len + 1 > sizeof sndbuf)
abort ();
if (SERIAL_WRITE(monitor_desc, sndbuf, len))
fprintf_unfiltered (stderr, "SERIAL_WRITE failed: %s\n", safe_strerror (errno));
/* We used to expect that the next immediate output was the characters we
just output, but sometimes some extra junk appeared before the characters
we expected, like an extra prompt, or a portmaster sending telnet negotiations.
So, just start searching for what we sent, and skip anything unknown. */
monitor_expect (sndbuf, (char *)0, 0);
}
/* Read a character from the remote system, doing all the fancy
timeout stuff. */
static int
readchar (timeout)
int timeout;
{
int c;
static enum { last_random, last_nl, last_cr, last_crnl } state = last_random;
int looping;
do
{
looping = 0;
c = SERIAL_READCHAR (monitor_desc, timeout);
if (c >= 0)
{
c &= 0x7f;
if (remote_debug > 0)
{
char buf[2];
buf[0] = c;
buf[1] = '\0';
puts_debug ("read -->", buf, "<--");
}
}
/* Canonicialize \n\r combinations into one \r */
if ((current_monitor->flags & MO_HANDLE_NL) != 0)
{
if ((c == '\r' && state == last_nl)
|| (c == '\n' && state == last_cr))
{
state = last_crnl;
looping = 1;
}
else if (c == '\r')
state = last_cr;
else if (c != '\n')
state = last_random;
else
{
state = last_nl;
c = '\r';
}
}
}
while (looping);
if (c >= 0)
return c;
if (c == SERIAL_TIMEOUT)
#ifdef MAINTENANCE_CMDS
if (in_monitor_wait) /* Watchdog went off */
{
target_mourn_inferior ();
error ("Watchdog has expired. Target detached.\n");
}
else
#endif
error ("Timeout reading from remote system.");
perror_with_name ("remote-monitor");
}
/* Scan input from the remote system, until STRING is found. If BUF is non-
zero, then collect input until we have collected either STRING or BUFLEN-1
chars. In either case we terminate BUF with a 0. If input overflows BUF
because STRING can't be found, return -1, else return number of chars in BUF
(minus the terminating NUL). Note that in the non-overflow case, STRING
will be at the end of BUF. */
int
monitor_expect (string, buf, buflen)
char *string;
char *buf;
int buflen;
{
char *p = string;
int obuflen = buflen;
int c;
extern struct target_ops *targ_ops;
immediate_quit = 1;
while (1)
{
if (buf)
{
if (buflen < 2)
{
*buf = '\000';
immediate_quit = 0;
return -1;
}
c = readchar (timeout);
if (c == '\000')
continue;
*buf++ = c;
buflen--;
}
else
c = readchar (timeout);
/* Don't expect any ^C sent to be echoed */
if (*p == '\003' || c == *p)
{
p++;
if (*p == '\0')
{
immediate_quit = 0;
if (buf)
{
*buf++ = '\000';
return obuflen - buflen;
}
else
return 0;
}
}
else if ((c == '\021' || c == '\023') &&
(strcmp(targ_ops->to_shortname, "m32r") == 0))
{ /* m32r monitor emits random DC1/DC3 chars */
continue;
}
else
{
p = string;
if (c == *p)
p++;
}
}
}
/* Search for a regexp. */
static int
monitor_expect_regexp (pat, buf, buflen)
struct re_pattern_buffer *pat;
char *buf;
int buflen;
{
char *mybuf;
char *p;
if (buf)
mybuf = buf;
else
{
mybuf = alloca (1024);
buflen = 1024;
}
p = mybuf;
while (1)
{
int retval;
if (p - mybuf >= buflen)
{ /* Buffer about to overflow */
/* On overflow, we copy the upper half of the buffer to the lower half. Not
great, but it usually works... */
memcpy (mybuf, mybuf + buflen / 2, buflen / 2);
p = mybuf + buflen / 2;
}
*p++ = readchar (timeout);
retval = re_search (pat, mybuf, p - mybuf, 0, p - mybuf, NULL);
if (retval >= 0)
return 1;
}
}
/* Keep discarding input until we see the MONITOR prompt.
The convention for dealing with the prompt is that you
o give your command
o *then* wait for the prompt.
Thus the last thing that a procedure does with the serial line will
be an monitor_expect_prompt(). Exception: monitor_resume does not
wait for the prompt, because the terminal is being handed over to
the inferior. However, the next thing which happens after that is
a monitor_wait which does wait for the prompt. Note that this
includes abnormal exit, e.g. error(). This is necessary to prevent
getting into states from which we can't recover. */
int
monitor_expect_prompt (buf, buflen)
char *buf;
int buflen;
{
return monitor_expect (current_monitor->prompt, buf, buflen);
}
/* Get N 32-bit words from remote, each preceded by a space, and put
them in registers starting at REGNO. */
#if 0
static unsigned long
get_hex_word ()
{
unsigned long val;
int i;
int ch;
do
ch = readchar (timeout);
while (isspace(ch));
val = from_hex (ch);
for (i = 7; i >= 1; i--)
{
ch = readchar (timeout);
if (!isxdigit (ch))
break;
val = (val << 4) | from_hex (ch);
}
return val;
}
#endif
static void
compile_pattern (pattern, compiled_pattern, fastmap)
char *pattern;
struct re_pattern_buffer *compiled_pattern;
char *fastmap;
{
int tmp;
char *val;
compiled_pattern->fastmap = fastmap;
tmp = re_set_syntax (RE_SYNTAX_EMACS);
val = re_compile_pattern (pattern,
strlen (pattern),
compiled_pattern);
re_set_syntax (tmp);
if (val)
error ("compile_pattern: Can't compile pattern string `%s': %s!", pattern, val);
if (fastmap)
re_compile_fastmap (compiled_pattern);
}
/* Open a connection to a remote debugger. NAME is the filename used
for communication. */
void
monitor_open (args, mon_ops, from_tty)
char *args;
struct monitor_ops *mon_ops;
int from_tty;
{
char *name;
char **p;
if (mon_ops->magic != MONITOR_OPS_MAGIC)
error ("Magic number of monitor_ops struct wrong.");
targ_ops = mon_ops->target;
name = targ_ops->to_shortname;
if (!args)
error ("Use `target %s DEVICE-NAME' to use a serial port, or \n\
`target %s HOST-NAME:PORT-NUMBER' to use a network connection.", name, name);
target_preopen (from_tty);
/* Setup pattern for register dump */
if (mon_ops->register_pattern)
compile_pattern (mon_ops->register_pattern, ®ister_pattern,
register_fastmap);
if (mon_ops->getmem.resp_delim)
compile_pattern (mon_ops->getmem.resp_delim, &getmem_resp_delim_pattern,
getmem_resp_delim_fastmap);
unpush_target (targ_ops);
if (dev_name)
free (dev_name);
dev_name = strsave (args);
monitor_desc = SERIAL_OPEN (dev_name);
if (!monitor_desc)
perror_with_name (dev_name);
if (baud_rate != -1)
{
if (SERIAL_SETBAUDRATE (monitor_desc, baud_rate))
{
SERIAL_CLOSE (monitor_desc);
perror_with_name (dev_name);
}
}
SERIAL_RAW (monitor_desc);
SERIAL_FLUSH_INPUT (monitor_desc);
/* some systems only work with 2 stop bits */
SERIAL_SETSTOPBITS (monitor_desc, mon_ops->stopbits);
current_monitor = mon_ops;
/* See if we can wake up the monitor. First, try sending a stop sequence,
then send the init strings. Last, remove all breakpoints. */
if (current_monitor->stop)
{
monitor_stop ();
if ((current_monitor->flags & MO_NO_ECHO_ON_OPEN) == 0)
{
monitor_expect_prompt (NULL, 0);
}
}
/* wake up the monitor and see if it's alive */
for (p = mon_ops->init; *p != NULL; p++)
{
/* Some of the characters we send may not be echoed,
but we hope to get a prompt at the end of it all. */
if ((current_monitor->flags & MO_NO_ECHO_ON_OPEN) == 0)
monitor_printf(*p);
else
monitor_printf_noecho (*p);
monitor_expect_prompt (NULL, 0);
}
SERIAL_FLUSH_INPUT (monitor_desc);
/* Remove all breakpoints */
if (mon_ops->clr_all_break)
{
monitor_printf (mon_ops->clr_all_break);
monitor_expect_prompt (NULL, 0);
}
if (from_tty)
printf_unfiltered ("Remote target %s connected to %s\n", name, dev_name);
push_target (targ_ops);
inferior_pid = 42000; /* Make run command think we are busy... */
/* Give monitor_wait something to read */
monitor_printf (current_monitor->line_term);
remote_dcache = dcache_init (monitor_read_memory, monitor_write_memory);
start_remote ();
}
/* Close out all files and local state before this target loses
control. */
void
monitor_close (quitting)
int quitting;
{
if (monitor_desc)
SERIAL_CLOSE (monitor_desc);
monitor_desc = NULL;
}
/* Terminate the open connection to the remote debugger. Use this
when you want to detach and do something else with your gdb. */
static void
monitor_detach (args, from_tty)
char *args;
int from_tty;
{
pop_target (); /* calls monitor_close to do the real work */
if (from_tty)
printf_unfiltered ("Ending remote %s debugging\n", target_shortname);
}
/* Convert VALSTR into the target byte-ordered value of REGNO and store it. */
char *
monitor_supply_register (regno, valstr)
int regno;
char *valstr;
{
unsigned int val;
unsigned char regbuf[MAX_REGISTER_RAW_SIZE];
char *p;
val = strtoul (valstr, &p, 16);
if (val == 0 && valstr == p)
error ("monitor_supply_register (%d): bad value from monitor: %s.",
regno, valstr);
/* supply register stores in target byte order, so swap here */
store_unsigned_integer (regbuf, REGISTER_RAW_SIZE (regno), val);
supply_register (regno, regbuf);
return p;
}
/* Tell the remote machine to resume. */
static void
monitor_resume (pid, step, sig)
int pid, step;
enum target_signal sig;
{
/* Some monitors require a different command when starting a program */
if (current_monitor->flags & MO_RUN_FIRST_TIME && first_time == 1)
{
first_time = 0;
monitor_printf ("run\r");
if (current_monitor->flags & MO_NEED_REGDUMP_AFTER_CONT)
dump_reg_flag = 1;
return;
}
dcache_flush (remote_dcache);
if (step)
monitor_printf (current_monitor->step);
else
{
monitor_printf (current_monitor->cont);
if (current_monitor->flags & MO_NEED_REGDUMP_AFTER_CONT)
dump_reg_flag = 1;
}
}
/* Parse the output of a register dump command. A monitor specific
regexp is used to extract individual register descriptions of the
form REG=VAL. Each description is split up into a name and a value
string which are passed down to monitor specific code. */
static void
parse_register_dump (buf, len)
char *buf;
int len;
{
while (1)
{
int regnamelen, vallen;
char *regname, *val;
/* Element 0 points to start of register name, and element 1
points to the start of the register value. */
struct re_registers register_strings;
if (re_search (®ister_pattern, buf, len, 0, len,
®ister_strings) == -1)
break;
regnamelen = register_strings.end[1] - register_strings.start[1];
regname = buf + register_strings.start[1];
vallen = register_strings.end[2] - register_strings.start[2];
val = buf + register_strings.start[2];
current_monitor->supply_register (regname, regnamelen, val, vallen);
buf += register_strings.end[0];
len -= register_strings.end[0];
}
}
/* Send ^C to target to halt it. Target will respond, and send us a
packet. */
static void
monitor_interrupt (signo)
int signo;
{
/* If this doesn't work, try more severe steps. */
signal (signo, monitor_interrupt_twice);
if (remote_debug)
printf_unfiltered ("monitor_interrupt called\n");
target_stop ();
}
/* The user typed ^C twice. */
static void
monitor_interrupt_twice (signo)
int signo;
{
signal (signo, ofunc);
monitor_interrupt_query ();
signal (signo, monitor_interrupt);
}
/* Ask the user what to do when an interrupt is received. */
static void
monitor_interrupt_query ()
{
target_terminal_ours ();
if (query ("Interrupted while waiting for the program.\n\
Give up (and stop debugging it)? "))
{
target_mourn_inferior ();
return_to_top_level (RETURN_QUIT);
}
target_terminal_inferior ();
}
static void
monitor_wait_cleanup (old_timeout)
int old_timeout;
{
timeout = old_timeout;
signal (SIGINT, ofunc);
in_monitor_wait = 0;
}
/* Wait until the remote machine stops, then return, storing status in
status just as `wait' would. */
static int
monitor_wait (pid, status)
int pid;
struct target_waitstatus *status;
{
int old_timeout = timeout;
char buf[1024];
int resp_len;
struct cleanup *old_chain;
status->kind = TARGET_WAITKIND_EXITED;
status->value.integer = 0;
old_chain = make_cleanup (monitor_wait_cleanup, old_timeout);
#ifdef MAINTENANCE_CMDS
in_monitor_wait = 1;
timeout = watchdog > 0 ? watchdog : -1;
#else
timeout = -1; /* Don't time out -- user program is running. */
#endif
ofunc = (void (*)()) signal (SIGINT, monitor_interrupt);
do
{
resp_len = monitor_expect_prompt (buf, sizeof (buf));
if (resp_len <= 0)
fprintf_unfiltered (gdb_stderr, "monitor_wait: excessive response from monitor: %s.", buf);
}
while (resp_len < 0);
signal (SIGINT, ofunc);
timeout = old_timeout;
if (dump_reg_flag && current_monitor->dump_registers)
{
dump_reg_flag = 0;
monitor_printf (current_monitor->dump_registers);
resp_len = monitor_expect_prompt (buf, sizeof (buf));
}
if (current_monitor->register_pattern)
parse_register_dump (buf, resp_len);
status->kind = TARGET_WAITKIND_STOPPED;
status->value.sig = TARGET_SIGNAL_TRAP;
discard_cleanups (old_chain);
in_monitor_wait = 0;
return inferior_pid;
}
/* Fetch register REGNO, or all registers if REGNO is -1. Returns
errno value. */
static void
monitor_fetch_register (regno)
int regno;
{
char *name;
static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
char regbuf[MAX_REGISTER_RAW_SIZE * 2 + 1];
int i;
name = current_monitor->regnames[regno];
if (!name)
{
supply_register (regno, zerobuf);
return;
}
/* send the register examine command */
monitor_printf (current_monitor->getreg.cmd, name);
/* If RESP_DELIM is specified, we search for that as a leading
delimiter for the register value. Otherwise, we just start
searching from the start of the buf. */
if (current_monitor->getreg.resp_delim)
{
monitor_expect (current_monitor->getreg.resp_delim, NULL, 0);
/* Handle case of first 32 registers listed in pairs. */
if (current_monitor->flags & MO_32_REGS_PAIRED
&& regno & 1 == 1 && regno < 32)
monitor_expect (current_monitor->getreg.resp_delim, NULL, 0);
}
/* Skip leading spaces and "0x" if MO_HEX_PREFIX flag is set */
if (current_monitor->flags & MO_HEX_PREFIX)
{
int c;
c = readchar (timeout);
while (c == ' ')
c = readchar (timeout);
if ((c == '0') && ((c = readchar (timeout)) == 'x'))
;
else
error ("Bad value returned from monitor while fetching register %x.",
regno);
}
/* Read upto the maximum number of hex digits for this register, skipping
spaces, but stop reading if something else is seen. Some monitors
like to drop leading zeros. */
for (i = 0; i < REGISTER_RAW_SIZE (regno) * 2; i++)
{
int c;
c = readchar (timeout);
while (c == ' ')
c = readchar (timeout);
if (!isxdigit (c))
break;
regbuf[i] = c;
}
regbuf[i] = '\000'; /* terminate the number */
/* If TERM is present, we wait for that to show up. Also, (if TERM
is present), we will send TERM_CMD if that is present. In any
case, we collect all of the output into buf, and then wait for
the normal prompt. */
if (current_monitor->getreg.term)
{
monitor_expect (current_monitor->getreg.term, NULL, 0); /* get response */
if (current_monitor->getreg.term_cmd)
{
monitor_printf (current_monitor->getreg.term_cmd);
monitor_expect_prompt (NULL, 0);
}
}
else
monitor_expect_prompt (NULL, 0); /* get response */
monitor_supply_register (regno, regbuf);
}
/* Read the remote registers into the block regs. */
static void
monitor_dump_regs ()
{
char buf[1024];
int resp_len;
if (current_monitor->dump_registers)
{
monitor_printf (current_monitor->dump_registers);
resp_len = monitor_expect_prompt (buf, sizeof (buf));
parse_register_dump (buf, resp_len);
}
else
abort(); /* Need some way to read registers */
}
static void
monitor_fetch_registers (regno)
int regno;
{
if (current_monitor->getreg.cmd)
{
if (regno >= 0)
{
monitor_fetch_register (regno);
return;
}
for (regno = 0; regno < NUM_REGS; regno++)
monitor_fetch_register (regno);
}
else {
monitor_dump_regs ();
}
}
/* Store register REGNO, or all if REGNO == 0. Return errno value. */
static void
monitor_store_register (regno)
int regno;
{
char *name;
unsigned int val;
name = current_monitor->regnames[regno];
if (!name)
return;
val = read_register (regno);
/* send the register deposit command */
if (current_monitor->flags & MO_REGISTER_VALUE_FIRST)
monitor_printf (current_monitor->setreg.cmd, val, name);
else if (current_monitor->flags & MO_SETREG_INTERACTIVE)
monitor_printf (current_monitor->setreg.cmd, name);
else
monitor_printf (current_monitor->setreg.cmd, name, val);
if (current_monitor->setreg.term)
{
monitor_expect (current_monitor->setreg.term, NULL, 0);
if (current_monitor->flags & MO_SETREG_INTERACTIVE)
monitor_printf ("%x\r", val);
monitor_expect_prompt (NULL, 0);
}
else
monitor_expect_prompt (NULL, 0);
}
/* Store the remote registers. */
static void
monitor_store_registers (regno)
int regno;
{
if (regno >= 0)
{
monitor_store_register (regno);
return;
}
for (regno = 0; regno < NUM_REGS; regno++)
monitor_store_register (regno);
}
/* Get ready to modify the registers array. On machines which store
individual registers, this doesn't need to do anything. On machines
which store all the registers in one fell swoop, this makes sure
that registers contains all the registers from the program being
debugged. */
static void
monitor_prepare_to_store ()
{
/* Do nothing, since we can store individual regs */
}
static void
monitor_files_info (ops)
struct target_ops *ops;
{
printf_unfiltered ("\tAttached to %s at %d baud.\n", dev_name, baud_rate);
}
static int
monitor_write_memory (memaddr, myaddr, len)
CORE_ADDR memaddr;
char *myaddr;
int len;
{
unsigned int val;
char *cmd;
int i;
if (current_monitor->flags & MO_ADDR_BITS_REMOVE)
memaddr = ADDR_BITS_REMOVE (memaddr);
/* Use memory fill command for leading 0 bytes. */
if (current_monitor->fill)
{
for (i = 0; i < len; i++)
if (myaddr[i] != 0)
break;
if (i > 4) /* More than 4 zeros is worth doing */
{
if (current_monitor->flags & MO_FILL_USES_ADDR)
monitor_printf (current_monitor->fill, memaddr, memaddr + i, 0);
else
monitor_printf (current_monitor->fill, memaddr, i, 0);
monitor_expect_prompt (NULL, 0);
return i;
}
}
#if 0
/* Can't actually use long longs if VAL is an int (nice idea, though). */
if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->setmem.cmdll)
{
len = 8;
cmd = current_monitor->setmem.cmdll;
}
else
#endif
if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->setmem.cmdl)
{
len = 4;
cmd = current_monitor->setmem.cmdl;
}
else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->setmem.cmdw)
{
len = 2;
cmd = current_monitor->setmem.cmdw;
}
else
{
len = 1;
cmd = current_monitor->setmem.cmdb;
}
val = extract_unsigned_integer (myaddr, len);
if (current_monitor->flags & MO_NO_ECHO_ON_SETMEM)
monitor_printf_noecho (cmd, memaddr, val);
else if (current_monitor->flags & MO_SETMEM_INTERACTIVE)
{
monitor_printf_noecho (cmd, memaddr);
if (current_monitor->setmem.term)
{
monitor_expect (current_monitor->setmem.term, NULL, 0);
monitor_printf ("%x\r", val);
}
}
else
monitor_printf (cmd, memaddr, val);
monitor_expect_prompt (NULL, 0);
return len;
}
/* This is an alternate form of monitor_read_memory which is used for monitors
which can only read a single byte/word/etc. at a time. */
static int
monitor_read_memory_single (memaddr, myaddr, len)
CORE_ADDR memaddr;
char *myaddr;
int len;
{
unsigned int val;
char membuf[sizeof(int) * 2 + 1];
char *p;
char *cmd;
int i;
#if 0
/* Can't actually use long longs (nice idea, though). In fact, the
call to strtoul below will fail if it tries to convert a value
that's too big to fit in a long. */
if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->getmem.cmdll)
{
len = 8;
cmd = current_monitor->getmem.cmdll;
}
else
#endif
if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->getmem.cmdl)
{
len = 4;
cmd = current_monitor->getmem.cmdl;
}
else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->getmem.cmdw)
{
len = 2;
cmd = current_monitor->getmem.cmdw;
}
else
{
len = 1;
cmd = current_monitor->getmem.cmdb;
}
/* Send the examine command. */
monitor_printf (cmd, memaddr);
/* If RESP_DELIM is specified, we search for that as a leading
delimiter for the memory value. Otherwise, we just start
searching from the start of the buf. */
if (current_monitor->getmem.resp_delim)
monitor_expect_regexp (&getmem_resp_delim_pattern, NULL, 0);
/* Now, read the appropriate number of hex digits for this loc,
skipping spaces. */
/* Skip leading spaces and "0x" if MO_HEX_PREFIX flag is set. */
if (current_monitor->flags & MO_HEX_PREFIX)
{
int c;
c = readchar (timeout);
while (c == ' ')
c = readchar (timeout);
if ((c == '0') && ((c = readchar (timeout)) == 'x'))
;
else
error ("monitor_read_memory_single (0x%x): bad response from monitor: %.*s%c.",
memaddr, i, membuf, c);
}
for (i = 0; i < len * 2; i++)
{
int c;
while (1)
{
c = readchar (timeout);
if (isxdigit (c))
break;
if (c == ' ')
continue;
error ("monitor_read_memory_single (0x%x): bad response from monitor: %.*s%c.",
memaddr, i, membuf, c);
}
membuf[i] = c;
}
membuf[i] = '\000'; /* terminate the number */
/* If TERM is present, we wait for that to show up. Also, (if TERM is
present), we will send TERM_CMD if that is present. In any case, we collect
all of the output into buf, and then wait for the normal prompt. */
if (current_monitor->getmem.term)
{
monitor_expect (current_monitor->getmem.term, NULL, 0); /* get response */
if (current_monitor->getmem.term_cmd)
{
monitor_printf (current_monitor->getmem.term_cmd);
monitor_expect_prompt (NULL, 0);
}
}
else
monitor_expect_prompt (NULL, 0); /* get response */
p = membuf;
val = strtoul (membuf, &p, 16);
if (val == 0 && membuf == p)
error ("monitor_read_memory_single (0x%x): bad value from monitor: %s.",
memaddr, membuf);
/* supply register stores in target byte order, so swap here */
store_unsigned_integer (myaddr, len, val);
return len;
}
/* Copy LEN bytes of data from debugger memory at MYADDR to inferior's
memory at MEMADDR. Returns length moved. Currently, we do no more
than 16 bytes at a time. */
static int
monitor_read_memory (memaddr, myaddr, len)
CORE_ADDR memaddr;
char *myaddr;
int len;
{
unsigned int val;
char buf[512];
char *p, *p1;
int resp_len;
int i;
CORE_ADDR dumpaddr;
if (current_monitor->flags & MO_ADDR_BITS_REMOVE)
memaddr = ADDR_BITS_REMOVE (memaddr);
if (current_monitor->flags & MO_GETMEM_READ_SINGLE)
return monitor_read_memory_single (memaddr, myaddr, len);
len = min (len, 16);
dumpaddr = memaddr & ~0xf;
/* See if xfer would cross a 16 byte boundary. If so, clip it. */
if (((memaddr ^ (memaddr + len - 1)) & ~0xf) != 0)
len = ((memaddr + len) & ~0xf) - memaddr;
/* send the memory examine command */
if (current_monitor->flags & MO_GETMEM_NEEDS_RANGE)
monitor_printf (current_monitor->getmem.cmdb, memaddr, memaddr + len - 1);
else if (current_monitor->flags & MO_GETMEM_16_BOUNDARY)
monitor_printf (current_monitor->getmem.cmdb, dumpaddr);
else
monitor_printf (current_monitor->getmem.cmdb, memaddr, len);
/* If TERM is present, we wait for that to show up. Also, (if TERM
is present), we will send TERM_CMD if that is present. In any
case, we collect all of the output into buf, and then wait for
the normal prompt. */
if (current_monitor->getmem.term)
{
resp_len = monitor_expect (current_monitor->getmem.term, buf, sizeof buf); /* get response */
if (resp_len <= 0)
error ("monitor_read_memory (0x%x): excessive response from monitor: %.*s.",
memaddr, resp_len, buf);
if (current_monitor->getmem.term_cmd)
{
SERIAL_WRITE (monitor_desc, current_monitor->getmem.term_cmd,
strlen (current_monitor->getmem.term_cmd));
monitor_expect_prompt (NULL, 0);
}
}
else
resp_len = monitor_expect_prompt (buf, sizeof buf); /* get response */
p = buf;
/* If RESP_DELIM is specified, we search for that as a leading
delimiter for the values. Otherwise, we just start searching
from the start of the buf. */
if (current_monitor->getmem.resp_delim)
{
int retval, tmp;
struct re_registers resp_strings;
tmp = strlen (p);
retval = re_search (&getmem_resp_delim_pattern, p, tmp, 0, tmp,
&resp_strings);
if (retval < 0)
error ("monitor_read_memory (0x%x): bad response from monitor: %.*s.",
memaddr, resp_len, buf);
p += resp_strings.end[0];
#if 0
p = strstr (p, current_monitor->getmem.resp_delim);
if (!p)
error ("monitor_read_memory (0x%x): bad response from monitor: %.*s.",
memaddr, resp_len, buf);
p += strlen (current_monitor->getmem.resp_delim);
#endif
}
if (current_monitor->flags & MO_GETMEM_16_BOUNDARY)
{
i = len;
while (!(*p == '\000' || *p == '\n' || *p == '\r') && i > 0)
{
if (isxdigit (*p))
{
if (dumpaddr >= memaddr && i > 0)
{
val = fromhex (*p) * 16 + fromhex (*(p+1));
*myaddr++ = val;
--i;
}
++dumpaddr;
++p;
}
++p;
}
return len;
}
for (i = len; i > 0; i--)
{
/* Skip non-hex chars, but bomb on end of string and newlines */
while (1)
{
if (isxdigit (*p))
break;
if (*p == '\000' || *p == '\n' || *p == '\r')
error ("monitor_read_memory (0x%x): badly terminated response from monitor: %.*s", memaddr, resp_len, buf);
p++;
}
val = strtoul (p, &p1, 16);
if (val == 0 && p == p1)
error ("monitor_read_memory (0x%x): bad value from monitor: %.*s.", memaddr,
resp_len, buf);
*myaddr++ = val;
if (i == 1)
break;
p = p1;
}
return len;
}
static int
monitor_xfer_memory (memaddr, myaddr, len, write, target)
CORE_ADDR memaddr;
char *myaddr;
int len;
int write;
struct target_ops *target; /* ignored */
{
return dcache_xfer_memory (remote_dcache, memaddr, myaddr, len, write);
}
static void
monitor_kill ()
{
return; /* ignore attempts to kill target system */
}
/* All we actually do is set the PC to the start address of exec_bfd, and start
the program at that point. */
static void
monitor_create_inferior (exec_file, args, env)
char *exec_file;
char *args;
char **env;
{
if (args && (*args != '\000'))
error ("Args are not supported by the monitor.");
first_time = 1;
clear_proceed_status ();
proceed (bfd_get_start_address (exec_bfd), TARGET_SIGNAL_0, 0);
}
/* Clean up when a program exits.
The program actually lives on in the remote processor's RAM, and may be
run again without a download. Don't leave it full of breakpoint
instructions. */
static void
monitor_mourn_inferior ()
{
unpush_target (targ_ops);
generic_mourn_inferior (); /* Do all the proper things now */
}
#define NUM_MONITOR_BREAKPOINTS 8
static CORE_ADDR breakaddr[NUM_MONITOR_BREAKPOINTS] = {0};
/* Tell the monitor to add a breakpoint. */
static int
monitor_insert_breakpoint (addr, shadow)
CORE_ADDR addr;
char *shadow;
{
int i;
unsigned char *bp;
int bplen;
if (current_monitor->set_break == NULL)
error ("No set_break defined for this monitor");
if (current_monitor->flags & MO_ADDR_BITS_REMOVE)
addr = ADDR_BITS_REMOVE (addr);
/* Determine appropriate breakpoint size for this address. */
bp = memory_breakpoint_from_pc (&addr, &bplen);
for (i = 0; i < NUM_MONITOR_BREAKPOINTS; i++)
{
if (breakaddr[i] == 0)
{
breakaddr[i] = addr;
monitor_read_memory (addr, shadow, bplen);
monitor_printf (current_monitor->set_break, addr);
monitor_expect_prompt (NULL, 0);
return 0;
}
}
error ("Too many breakpoints (> %d) for monitor.", NUM_MONITOR_BREAKPOINTS);
}
/* Tell the monitor to remove a breakpoint. */
static int
monitor_remove_breakpoint (addr, shadow)
CORE_ADDR addr;
char *shadow;
{
int i;
if (current_monitor->clr_break == NULL)
error ("No clr_break defined for this monitor");
if (current_monitor->flags & MO_ADDR_BITS_REMOVE)
addr = ADDR_BITS_REMOVE (addr);
for (i = 0; i < NUM_MONITOR_BREAKPOINTS; i++)
{
if (breakaddr[i] == addr)
{
breakaddr[i] = 0;
/* some monitors remove breakpoints based on the address */
if (current_monitor->flags & MO_CLR_BREAK_USES_ADDR)
monitor_printf (current_monitor->clr_break, addr);
else if (current_monitor->flags & MO_CLR_BREAK_1_BASED)
monitor_printf (current_monitor->clr_break, i + 1);
else
monitor_printf (current_monitor->clr_break, i);
monitor_expect_prompt (NULL, 0);
return 0;
}
}
fprintf_unfiltered (stderr, "Can't find breakpoint associated with 0x%x\n", addr);
return 1;
}
/* monitor_wait_srec_ack -- wait for the target to send an acknowledgement for
an S-record. Return non-zero if the ACK is received properly. */
static int
monitor_wait_srec_ack ()
{
int i, ch;
if (current_monitor->flags & MO_SREC_ACK_PLUS)
{
return (readchar (timeout) == '+');
}
else if (current_monitor->flags & MO_SREC_ACK_ROTATE)
{
/* Eat two backspaces, a "rotating" char (|/-\), and a space. */
if ((ch = readchar (1)) < 0)
return 0;
if ((ch = readchar (1)) < 0)
return 0;
if ((ch = readchar (1)) < 0)
return 0;
if ((ch = readchar (1)) < 0)
return 0;
}
return 1;
}
/* monitor_load -- download a file. */
static void
monitor_load (file, from_tty)
char *file;
int from_tty;
{
dcache_flush (remote_dcache);
if (current_monitor->load_routine)
current_monitor->load_routine (monitor_desc, file, hashmark);
else
{ /* The default is ascii S-records */
int n;
unsigned long load_offset;
char buf[128];
/* enable user to specify address for downloading as 2nd arg to load */
n = sscanf (file, "%s 0x%lx", buf, &load_offset);
if (n > 1)
file = buf;
else
load_offset = 0;
monitor_printf (current_monitor->load);
if (current_monitor->loadresp)
monitor_expect (current_monitor->loadresp, NULL, 0);
load_srec (monitor_desc, file, (bfd_vma) load_offset,
32, SREC_ALL, hashmark,
current_monitor->flags & MO_SREC_ACK ?
monitor_wait_srec_ack : NULL);
monitor_expect_prompt (NULL, 0);
}
/* Finally, make the PC point at the start address */
if (exec_bfd)
write_pc (bfd_get_start_address (exec_bfd));
inferior_pid = 0; /* No process now */
/* This is necessary because many things were based on the PC at the time that
we attached to the monitor, which is no longer valid now that we have loaded
new code (and just changed the PC). Another way to do this might be to call
normal_stop, except that the stack may not be valid, and things would get
horribly confused... */
clear_symtab_users ();
}
static void
monitor_stop ()
{
if ((current_monitor->flags & MO_SEND_BREAK_ON_STOP) != 0)
SERIAL_SEND_BREAK (monitor_desc);
if (current_monitor->stop)
monitor_printf_noecho (current_monitor->stop);
}
/* Put a command string, in args, out to MONITOR. Output from MONITOR
is placed on the users terminal until the prompt is seen. FIXME: We
read the characters ourseleves here cause of a nasty echo. */
static void
monitor_command (args, from_tty)
char *args;
int from_tty;
{
char *p;
int resp_len;
char buf[1000];
if (monitor_desc == NULL)
error ("monitor target not open.");
p = current_monitor->prompt;
/* Send the command. Note that if no args were supplied, then we're
just sending the monitor a newline, which is sometimes useful. */
monitor_printf ("%s\r", (args ? args : ""));
resp_len = monitor_expect_prompt (buf, sizeof buf);
fputs_unfiltered (buf, gdb_stdout); /* Output the response */
}
/* Convert hex digit A to a number. */
#if 0
static int
from_hex (a)
int a;
{
if (a >= '0' && a <= '9')
return a - '0';
if (a >= 'a' && a <= 'f')
return a - 'a' + 10;
if (a >= 'A' && a <= 'F')
return a - 'A' + 10;
error ("Reply contains invalid hex digit 0x%x", a);
}
#endif
char *
monitor_get_dev_name ()
{
return dev_name;
}
static struct target_ops monitor_ops =
{
NULL, /* to_shortname */
NULL, /* to_longname */
NULL, /* to_doc */
NULL, /* to_open */
monitor_close, /* to_close */
NULL, /* to_attach */
monitor_detach, /* to_detach */
monitor_resume, /* to_resume */
monitor_wait, /* to_wait */
monitor_fetch_registers, /* to_fetch_registers */
monitor_store_registers, /* to_store_registers */
monitor_prepare_to_store, /* to_prepare_to_store */
monitor_xfer_memory, /* to_xfer_memory */
monitor_files_info, /* to_files_info */
monitor_insert_breakpoint, /* to_insert_breakpoint */
monitor_remove_breakpoint, /* to_remove_breakpoint */
0, /* to_terminal_init */
0, /* to_terminal_inferior */
0, /* to_terminal_ours_for_output */
0, /* to_terminal_ours */
0, /* to_terminal_info */
monitor_kill, /* to_kill */
monitor_load, /* to_load */
0, /* to_lookup_symbol */
monitor_create_inferior, /* to_create_inferior */
monitor_mourn_inferior, /* to_mourn_inferior */
0, /* to_can_run */
0, /* to_notice_signals */
0, /* to_thread_alive */
monitor_stop, /* to_stop */
process_stratum, /* to_stratum */
0, /* to_next */
1, /* to_has_all_memory */
1, /* to_has_memory */
1, /* to_has_stack */
1, /* to_has_registers */
1, /* to_has_execution */
0, /* sections */
0, /* sections_end */
OPS_MAGIC /* to_magic */
};
/* Init the target_ops structure pointed at by OPS */
void
init_monitor_ops (ops)
struct target_ops *ops;
{
memcpy (ops, &monitor_ops, sizeof monitor_ops);
}
/* Define additional commands that are usually only used by monitors. */
void
_initialize_remote_monitors ()
{
add_show_from_set (add_set_cmd ("hash", no_class, var_boolean,
(char *)&hashmark,
"Set display of activity while downloading a file.\n\
When enabled, a hashmark \'#\' is displayed.",
&setlist),
&showlist);
add_com ("monitor", class_obscure, monitor_command,
"Send a command to the debug monitor.");
}
|