?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
- Fixes '=' whitespace
[openocd.git] / src / server / gdb_server.c
blob4cf187576758639d0a3ab7a975dc7f2715867019
1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
7 * *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
20 * *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 #include "gdb_server.h"
31 #include "target_request.h"
32 #include "register.h"
33 #include "server.h"
34 #include "flash.h"
35 #include "image.h"
36 #include "jtag.h"
37
38
39 #if 0
40 #define _DEBUG_GDB_IO_
41 #endif
42
43 static int gdb_breakpoint_override;
44 static enum breakpoint_type gdb_breakpoint_override_type;
45
46 extern int gdb_error(connection_t *connection, int retval);
47 static unsigned short gdb_port = 3333;
48 static const char *DIGITS = "0123456789abcdef";
49
50 static void gdb_log_callback(void *priv, const char *file, int line,
51 const char *function, const char *string);
52
53 enum gdb_detach_mode
54 {
55 GDB_DETACH_RESUME,
56 GDB_DETACH_RESET,
57 GDB_DETACH_HALT,
58 GDB_DETACH_NOTHING
59 };
60
61 /* target behaviour on gdb detach */
62 enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME;
63
64 /* number of gdb connections, mainly to supress gdb related debugging spam
65 * in helper/log.c when no gdb connections are actually active */
66 int gdb_actual_connections;
67
68 /* set if we are sending a memory map to gdb
69 * via qXfer:memory-map:read packet */
70 /* enabled by default*/
71 int gdb_use_memory_map = 1;
72 /* enabled by default*/
73 int gdb_flash_program = 1;
74
75 /* if set, data aborts cause an error to be reported in memory read packets
76 * see the code in gdb_read_memory_packet() for further explanations */
77 int gdb_report_data_abort = 0;
78
79 int gdb_last_signal(target_t *target)
80 {
81 switch (target->debug_reason)
82 {
83 case DBG_REASON_DBGRQ:
84 return 0x2; /* SIGINT */
85 case DBG_REASON_BREAKPOINT:
86 case DBG_REASON_WATCHPOINT:
87 case DBG_REASON_WPTANDBKPT:
88 return 0x05; /* SIGTRAP */
89 case DBG_REASON_SINGLESTEP:
90 return 0x05; /* SIGTRAP */
91 case DBG_REASON_NOTHALTED:
92 return 0x0; /* no signal... shouldn't happen */
93 default:
94 LOG_USER("undefined debug reason %d - target needs reset", target->debug_reason);
95 return 0x0;
96 }
97 }
98
99 int check_pending(connection_t *connection, int timeout_s, int *got_data)
100 {
101 /* a non-blocking socket will block if there is 0 bytes available on the socket,
102 * but return with as many bytes as are available immediately
103 */
104 struct timeval tv;
105 fd_set read_fds;
106 gdb_connection_t *gdb_con = connection->priv;
107 int t;
108 if (got_data == NULL)
109 got_data=&t;
110 *got_data = 0;
111
112 if (gdb_con->buf_cnt>0)
113 {
114 *got_data = 1;
115 return ERROR_OK;
116 }
117
118 FD_ZERO(&read_fds);
119 FD_SET(connection->fd, &read_fds);
120
121 tv.tv_sec = timeout_s;
122 tv.tv_usec = 0;
123 if (socket_select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0)
124 {
125 /* This can typically be because a "monitor" command took too long
126 * before printing any progress messages
127 */
128 if (timeout_s>0)
129 {
130 return ERROR_GDB_TIMEOUT;
131 } else
132 {
133 return ERROR_OK;
134 }
135 }
136 *got_data = FD_ISSET(connection->fd, &read_fds) != 0;
137 return ERROR_OK;
138 }
139
140 int gdb_get_char(connection_t *connection, int* next_char)
141 {
142 gdb_connection_t *gdb_con = connection->priv;
143 int retval = ERROR_OK;
144
145 #ifdef _DEBUG_GDB_IO_
146 char *debug_buffer;
147 #endif
148
149 if (gdb_con->buf_cnt-- > 0)
150 {
151 *next_char = *(gdb_con->buf_p++);
152 if (gdb_con->buf_cnt > 0)
153 connection->input_pending = 1;
154 else
155 connection->input_pending = 0;
156
157 #ifdef _DEBUG_GDB_IO_
158 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
159 #endif
160
161 return ERROR_OK;
162 }
163
164 for (;;)
165 {
166 if (connection->service->type == CONNECTION_PIPE)
167 {
168 gdb_con->buf_cnt = read(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
169 }
170 else
171 {
172 retval = check_pending(connection, 1, NULL);
173 if (retval != ERROR_OK)
174 return retval;
175 gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
176 }
177
178 if (gdb_con->buf_cnt > 0)
179 {
180 break;
181 }
182 if (gdb_con->buf_cnt == 0)
183 {
184 gdb_con->closed = 1;
185 return ERROR_SERVER_REMOTE_CLOSED;
186 }
187
188 #ifdef _WIN32
189 errno = WSAGetLastError();
190
191 switch (errno)
192 {
193 case WSAEWOULDBLOCK:
194 usleep(1000);
195 break;
196 case WSAECONNABORTED:
197 gdb_con->closed = 1;
198 return ERROR_SERVER_REMOTE_CLOSED;
199 case WSAECONNRESET:
200 gdb_con->closed = 1;
201 return ERROR_SERVER_REMOTE_CLOSED;
202 default:
203 LOG_ERROR("read: %d", errno);
204 exit(-1);
205 }
206 #else
207 switch (errno)
208 {
209 case EAGAIN:
210 usleep(1000);
211 break;
212 case ECONNABORTED:
213 gdb_con->closed = 1;
214 return ERROR_SERVER_REMOTE_CLOSED;
215 case ECONNRESET:
216 gdb_con->closed = 1;
217 return ERROR_SERVER_REMOTE_CLOSED;
218 default:
219 LOG_ERROR("read: %s", strerror(errno));
220 gdb_con->closed = 1;
221 return ERROR_SERVER_REMOTE_CLOSED;
222 }
223 #endif
224 }
225
226 #ifdef _DEBUG_GDB_IO_
227 debug_buffer = malloc(gdb_con->buf_cnt + 1);
228 memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt);
229 debug_buffer[gdb_con->buf_cnt] = 0;
230 LOG_DEBUG("received '%s'", debug_buffer);
231 free(debug_buffer);
232 #endif
233
234 gdb_con->buf_p = gdb_con->buffer;
235 gdb_con->buf_cnt--;
236 *next_char = *(gdb_con->buf_p++);
237 if (gdb_con->buf_cnt > 0)
238 connection->input_pending = 1;
239 else
240 connection->input_pending = 0;
241 #ifdef _DEBUG_GDB_IO_
242 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
243 #endif
244
245 return retval;
246 }
247
248 int gdb_putback_char(connection_t *connection, int last_char)
249 {
250 gdb_connection_t *gdb_con = connection->priv;
251
252 if (gdb_con->buf_p > gdb_con->buffer)
253 {
254 *(--gdb_con->buf_p) = last_char;
255 gdb_con->buf_cnt++;
256 }
257 else
258 {
259 LOG_ERROR("BUG: couldn't put character back");
260 }
261
262 return ERROR_OK;
263 }
264
265 /* The only way we can detect that the socket is closed is the first time
266 * we write to it, we will fail. Subsequent write operations will
267 * succeed. Shudder! */
268 int gdb_write(connection_t *connection, void *data, int len)
269 {
270 gdb_connection_t *gdb_con = connection->priv;
271 if (gdb_con->closed)
272 return ERROR_SERVER_REMOTE_CLOSED;
273
274 if (connection->service->type == CONNECTION_PIPE)
275 {
276 /* write to stdout */
277 if (write(STDOUT_FILENO, data, len) == len)
278 {
279 return ERROR_OK;
280 }
281 }
282 else
283 {
284 if (write_socket(connection->fd, data, len) == len)
285 {
286 return ERROR_OK;
287 }
288 }
289 gdb_con->closed = 1;
290 return ERROR_SERVER_REMOTE_CLOSED;
291 }
292
293 int gdb_put_packet_inner(connection_t *connection, char *buffer, int len)
294 {
295 int i;
296 unsigned char my_checksum = 0;
297 #ifdef _DEBUG_GDB_IO_
298 char *debug_buffer;
299 #endif
300 int reply;
301 int retval;
302 gdb_connection_t *gdb_con = connection->priv;
303
304 for (i = 0; i < len; i++)
305 my_checksum += buffer[i];
306
307 #ifdef _DEBUG_GDB_IO_
308 /*
309 * At this point we should have nothing in the input queue from GDB,
310 * however sometimes '-' is sent even though we've already received
311 * an ACK (+) for everything we've sent off.
312 */
313 int gotdata;
314 for (;;)
315 {
316 if ((retval = check_pending(connection, 0, &gotdata)) != ERROR_OK)
317 return retval;
318 if (!gotdata)
319 break;
320 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
321 return retval;
322 if ( reply == '$' ){
323 /* fix a problem with some IAR tools */
324 gdb_putback_char( connection, reply );
325 LOG_DEBUG("Unexpected start of new packet");
326 break;
327 }
328
329 LOG_WARNING("Discard unexpected char %c", reply);
330 }
331 #endif
332
333 while (1)
334 {
335 #ifdef _DEBUG_GDB_IO_
336 debug_buffer = malloc(len + 1);
337 memcpy(debug_buffer, buffer, len);
338 debug_buffer[len] = 0;
339 LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
340 free(debug_buffer);
341 #endif
342
343 char local_buffer[1024];
344 local_buffer[0] = '$';
345 if ((size_t)len + 4 <= sizeof(local_buffer))
346 {
347 /* performance gain on smaller packets by only a single call to gdb_write() */
348 memcpy(local_buffer+1, buffer, len++);
349 local_buffer[len++] = '#';
350 local_buffer[len++] = DIGITS[(my_checksum >> 4) & 0xf];
351 local_buffer[len++] = DIGITS[my_checksum & 0xf];
352 if ((retval = gdb_write(connection, local_buffer, len)) != ERROR_OK)
353 {
354 return retval;
355 }
356 }
357 else
358 {
359 /* larger packets are transmitted directly from caller supplied buffer
360 by several calls to gdb_write() to avoid dynamic allocation */
361 local_buffer[1] = '#';
362 local_buffer[2] = DIGITS[(my_checksum >> 4) & 0xf];
363 local_buffer[3] = DIGITS[my_checksum & 0xf];
364 if ((retval = gdb_write(connection, local_buffer, 1)) != ERROR_OK)
365 {
366 return retval;
367 }
368 if ((retval = gdb_write(connection, buffer, len)) != ERROR_OK)
369 {
370 return retval;
371 }
372 if ((retval = gdb_write(connection, local_buffer+1, 3)) != ERROR_OK)
373 {
374 return retval;
375 }
376 }
377
378 if (gdb_con->noack_mode)
379 break;
380
381 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
382 return retval;
383
384 if (reply == '+')
385 break;
386 else if (reply == '-')
387 {
388 /* Stop sending output packets for now */
389 log_remove_callback(gdb_log_callback, connection);
390 LOG_WARNING("negative reply, retrying");
391 }
392 else if (reply == 0x3)
393 {
394 gdb_con->ctrl_c = 1;
395 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
396 return retval;
397 if (reply == '+')
398 break;
399 else if (reply == '-')
400 {
401 /* Stop sending output packets for now */
402 log_remove_callback(gdb_log_callback, connection);
403 LOG_WARNING("negative reply, retrying");
404 }
405 else if ( reply == '$' ){
406 LOG_ERROR("GDB missing ack(1) - assumed good");
407 gdb_putback_char( connection, reply );
408 return ERROR_OK;
409 } else {
410
411 LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply);
412 gdb_con->closed = 1;
413 return ERROR_SERVER_REMOTE_CLOSED;
414 }
415 }
416 else if ( reply == '$' ){
417 LOG_ERROR("GDB missing ack(2) - assumed good");
418 gdb_putback_char( connection, reply );
419 return ERROR_OK;
420 }
421 else
422 {
423 LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection", reply);
424 gdb_con->closed = 1;
425 return ERROR_SERVER_REMOTE_CLOSED;
426 }
427 }
428 if (gdb_con->closed)
429 return ERROR_SERVER_REMOTE_CLOSED;
430
431 return ERROR_OK;
432 }
433
434 int gdb_put_packet(connection_t *connection, char *buffer, int len)
435 {
436 gdb_connection_t *gdb_con = connection->priv;
437 gdb_con->busy = 1;
438 int retval = gdb_put_packet_inner(connection, buffer, len);
439 gdb_con->busy = 0;
440
441 /* we sent some data, reset timer for keep alive messages */
442 kept_alive();
443
444 return retval;
445 }
446
447 static __inline__ int fetch_packet(connection_t *connection, int *checksum_ok, int noack, int *len, char *buffer)
448 {
449 unsigned char my_checksum = 0;
450 char checksum[3];
451 int character;
452 int retval;
453
454 gdb_connection_t *gdb_con = connection->priv;
455 my_checksum = 0;
456 int count = 0;
457 count = 0;
458 for (;;)
459 {
460 /* The common case is that we have an entire packet with no escape chars.
461 * We need to leave at least 2 bytes in the buffer to have
462 * gdb_get_char() update various bits and bobs correctly.
463 */
464 if ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt+count) < *len))
465 {
466 /* The compiler will struggle a bit with constant propagation and
467 * aliasing, so we help it by showing that these values do not
468 * change inside the loop
469 */
470 int i;
471 char *buf = gdb_con->buf_p;
472 int run = gdb_con->buf_cnt - 2;
473 i = 0;
474 int done = 0;
475 while (i < run)
476 {
477 character = *buf++;
478 i++;
479 if (character == '#')
480 {
481 /* Danger! character can be '#' when esc is
482 * used so we need an explicit boolean for done here.
483 */
484 done = 1;
485 break;
486 }
487
488 if (character == '}')
489 {
490 /* data transmitted in binary mode (X packet)
491 * uses 0x7d as escape character */
492 my_checksum += character & 0xff;
493 character = *buf++;
494 i++;
495 my_checksum += character & 0xff;
496 buffer[count++] = (character ^ 0x20) & 0xff;
497 }
498 else
499 {
500 my_checksum += character & 0xff;
501 buffer[count++] = character & 0xff;
502 }
503 }
504 gdb_con->buf_p += i;
505 gdb_con->buf_cnt -= i;
506 if (done)
507 break;
508 }
509 if (count > *len)
510 {
511 LOG_ERROR("packet buffer too small");
512 return ERROR_GDB_BUFFER_TOO_SMALL;
513 }
514
515 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
516 return retval;
517
518 if (character == '#')
519 break;
520
521 if (character == '}')
522 {
523 /* data transmitted in binary mode (X packet)
524 * uses 0x7d as escape character */
525 my_checksum += character & 0xff;
526 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
527 return retval;
528 my_checksum += character & 0xff;
529 buffer[count++] = (character ^ 0x20) & 0xff;
530 }
531 else
532 {
533 my_checksum += character & 0xff;
534 buffer[count++] = character & 0xff;
535 }
536 }
537
538 *len = count;
539
540 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
541 return retval;
542 checksum[0] = character;
543 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
544 return retval;
545 checksum[1] = character;
546 checksum[2] = 0;
547
548 if (!noack)
549 {
550 *checksum_ok = (my_checksum == strtoul(checksum, NULL, 16));
551 }
552
553 return ERROR_OK;
554 }
555
556 int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len)
557 {
558 int character;
559 int retval;
560 gdb_connection_t *gdb_con = connection->priv;
561
562 while (1)
563 {
564 do
565 {
566 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
567 return retval;
568
569 #ifdef _DEBUG_GDB_IO_
570 LOG_DEBUG("character: '%c'", character);
571 #endif
572
573 switch (character)
574 {
575 case '$':
576 break;
577 case '+':
578 /* gdb sends a dummy ack '+' at every remote connect - see remote_start_remote (remote.c)
579 * incase anyone tries to debug why they receive this warning every time */
580 LOG_WARNING("acknowledgment received, but no packet pending");
581 break;
582 case '-':
583 LOG_WARNING("negative acknowledgment, but no packet pending");
584 break;
585 case 0x3:
586 gdb_con->ctrl_c = 1;
587 *len = 0;
588 return ERROR_OK;
589 default:
590 LOG_WARNING("ignoring character 0x%x", character);
591 break;
592 }
593 } while (character != '$');
594
595
596
597 int checksum_ok = 0;
598 /* explicit code expansion here to get faster inlined code in -O3 by not
599 * calculating checksum
600 */
601 if (gdb_con->noack_mode)
602 {
603 if ((retval = fetch_packet(connection, &checksum_ok, 1, len, buffer)) != ERROR_OK)
604 return retval;
605 } else
606 {
607 if ((retval = fetch_packet(connection, &checksum_ok, 0, len, buffer)) != ERROR_OK)
608 return retval;
609 }
610
611 if (gdb_con->noack_mode)
612 {
613 /* checksum is not checked in noack mode */
614 break;
615 }
616 if (checksum_ok)
617 {
618 if ((retval = gdb_write(connection, "+", 1)) != ERROR_OK)
619 {
620 return retval;
621 }
622 break;
623 }
624 }
625 if (gdb_con->closed)
626 return ERROR_SERVER_REMOTE_CLOSED;
627
628 return ERROR_OK;
629 }
630
631 int gdb_get_packet(connection_t *connection, char *buffer, int *len)
632 {
633 gdb_connection_t *gdb_con = connection->priv;
634 gdb_con->busy = 1;
635 int retval = gdb_get_packet_inner(connection, buffer, len);
636 gdb_con->busy = 0;
637 return retval;
638 }
639
640 int gdb_output_con(connection_t *connection, const char* line)
641 {
642 char *hex_buffer;
643 int i, bin_size;
644
645 bin_size = strlen(line);
646
647 hex_buffer = malloc(bin_size*2 + 2);
648 if (hex_buffer == NULL)
649 return ERROR_GDB_BUFFER_TOO_SMALL;
650
651 hex_buffer[0] = 'O';
652 for (i = 0; i<bin_size; i++)
653 snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);
654 hex_buffer[bin_size*2+1] = 0;
655
656 int retval = gdb_put_packet(connection, hex_buffer, bin_size*2 + 1);
657
658 free(hex_buffer);
659 return retval;
660 }
661
662 int gdb_output(struct command_context_s *context, const char* line)
663 {
664 /* this will be dumped to the log and also sent as an O packet if possible */
665 LOG_USER_N("%s", line);
666 return ERROR_OK;
667 }
668
669
670 static void gdb_frontend_halted(struct target_s *target, connection_t *connection)
671 {
672 gdb_connection_t *gdb_connection = connection->priv;
673
674 /* In the GDB protocol when we are stepping or coninuing execution,
675 * we have a lingering reply. Upon receiving a halted event
676 * when we have that lingering packet, we reply to the original
677 * step or continue packet.
678 *
679 * Executing monitor commands can bring the target in and
680 * out of the running state so we'll see lots of TARGET_EVENT_XXX
681 * that are to be ignored.
682 */
683 if (gdb_connection->frontend_state == TARGET_RUNNING)
684 {
685 char sig_reply[4];
686 int signal;
687
688 /* stop forwarding log packets! */
689 log_remove_callback(gdb_log_callback, connection);
690
691 if (gdb_connection->ctrl_c)
692 {
693 signal = 0x2;
694 gdb_connection->ctrl_c = 0;
695 }
696 else
697 {
698 signal = gdb_last_signal(target);
699 }
700
701 snprintf(sig_reply, 4, "T%2.2x", signal);
702 gdb_put_packet(connection, sig_reply, 3);
703 gdb_connection->frontend_state = TARGET_HALTED;
704 }
705 }
706
707 int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
708 {
709 int retval;
710 connection_t *connection = priv;
711
712 target_handle_event( target, event );
713 switch (event)
714 {
715 case TARGET_EVENT_EARLY_HALTED:
716 gdb_frontend_halted(target, connection);
717 break;
718 case TARGET_EVENT_HALTED:
719 target_call_event_callbacks(target, TARGET_EVENT_GDB_END);
720 break;
721 case TARGET_EVENT_GDB_FLASH_ERASE_START:
722 target_handle_event( target, TARGET_EVENT_OLD_gdb_program_config );
723 if ((retval = jtag_execute_queue()) != ERROR_OK)
724 {
725 return retval;
726 }
727 break;
728 default:
729 break;
730 }
731
732 return ERROR_OK;
733 }
734
735 int gdb_new_connection(connection_t *connection)
736 {
737 gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t));
738 gdb_service_t *gdb_service = connection->service->priv;
739 int retval;
740 int initial_ack;
741
742 connection->priv = gdb_connection;
743
744 /* initialize gdb connection information */
745 gdb_connection->buf_p = gdb_connection->buffer;
746 gdb_connection->buf_cnt = 0;
747 gdb_connection->ctrl_c = 0;
748 gdb_connection->frontend_state = TARGET_HALTED;
749 gdb_connection->vflash_image = NULL;
750 gdb_connection->closed = 0;
751 gdb_connection->busy = 0;
752 gdb_connection->noack_mode = 0;
753
754 /* send ACK to GDB for debug request */
755 gdb_write(connection, "+", 1);
756
757 /* output goes through gdb connection */
758 command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
759
760 /* we must remove all breakpoints registered to the target as a previous
761 * GDB session could leave dangling breakpoints if e.g. communication
762 * timed out.
763 */
764 breakpoint_clear_target(gdb_service->target);
765 watchpoint_clear_target(gdb_service->target);
766
767 /* register callback to be informed about target events */
768 target_register_event_callback(gdb_target_callback_event_handler, connection);
769
770 /* a gdb session just attached, try to put the target in halt mode.
771 *
772 * DANGER!!!!
773 *
774 * If the halt fails(e.g. target needs a reset, JTAG communication not
775 * working, etc.), then the GDB connect will succeed as
776 * the get_gdb_reg_list() will lie and return a register list with
777 * dummy values.
778 *
779 * This allows GDB monitor commands to be run from a GDB init script to
780 * initialize the target
781 *
782 * Also, since the halt() is asynchronous target connect will be
783 * instantaneous and thus avoiding annoying timeout problems during
784 * connect.
785 */
786 target_halt(gdb_service->target);
787 /* FIX!!!! could extended-remote work better here?
788 *
789 * wait a tiny bit for halted state or we just continue. The
790 * GDB register packet will then contain garbage
791 */
792 target_wait_state(gdb_service->target, TARGET_HALTED, 500);
793
794 /* remove the initial ACK from the incoming buffer */
795 if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
796 return retval;
797
798 /* FIX!!!??? would we actually ever receive a + here???
799 * Not observed.
800 */
801 if (initial_ack != '+')
802 gdb_putback_char(connection, initial_ack);
803 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_ATTACH );
804
805 gdb_actual_connections++;
806
807 return ERROR_OK;
808 }
809
810 int gdb_connection_closed(connection_t *connection)
811 {
812 gdb_service_t *gdb_service = connection->service->priv;
813 gdb_connection_t *gdb_connection = connection->priv;
814
815 gdb_actual_connections--;
816
817 /* see if an image built with vFlash commands is left */
818 if (gdb_connection->vflash_image)
819 {
820 image_close(gdb_connection->vflash_image);
821 free(gdb_connection->vflash_image);
822 gdb_connection->vflash_image = NULL;
823 }
824
825 /* if this connection registered a debug-message receiver delete it */
826 delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
827
828 if (connection->priv)
829 {
830 free(connection->priv);
831 connection->priv = NULL;
832 }
833 else
834 {
835 LOG_ERROR("BUG: connection->priv == NULL");
836 }
837
838 target_unregister_event_callback(gdb_target_callback_event_handler, connection);
839 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_END);
840 log_remove_callback(gdb_log_callback, connection);
841
842 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_DETACH );
843
844 return ERROR_OK;
845 }
846
847 void gdb_send_error(connection_t *connection, uint8_t the_error)
848 {
849 char err[4];
850 snprintf(err, 4, "E%2.2X", the_error );
851 gdb_put_packet(connection, err, 3);
852 }
853
854 int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
855 {
856 char sig_reply[4];
857 int signal;
858
859 signal = gdb_last_signal(target);
860
861 snprintf(sig_reply, 4, "S%2.2x", signal);
862 gdb_put_packet(connection, sig_reply, 3);
863
864 return ERROR_OK;
865 }
866
867 static int gdb_reg_pos(target_t *target, int pos, int len)
868 {
869 if (target->endianness == TARGET_LITTLE_ENDIAN)
870 return pos;
871 else
872 return len - 1 - pos;
873 }
874
875 /* Convert register to string of bytes. NB! The # of bits in the
876 * register might be non-divisible by 8(a byte), in which
877 * case an entire byte is shown.
878 *
879 * NB! the format on the wire is the target endianess
880 *
881 * The format of reg->value is little endian
882 *
883 */
884 void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg)
885 {
886 int i;
887
888 uint8_t *buf;
889 int buf_len;
890 buf = reg->value;
891 buf_len = CEIL(reg->size, 8);
892
893 for (i = 0; i < buf_len; i++)
894 {
895 int j = gdb_reg_pos(target, i, buf_len);
896 tstr[i*2] = DIGITS[(buf[j]>>4) & 0xf];
897 tstr[i*2+1] = DIGITS[buf[j]&0xf];
898 }
899 }
900
901 static int hextoint(char c)
902 {
903 if (c>='0'&&c<='9')
904 {
905 return c-'0';
906 }
907 c = toupper(c);
908 if (c>='A'&&c<='F')
909 {
910 return c-'A'+10;
911 }
912 LOG_ERROR("BUG: invalid register value %08x", c);
913 return 0;
914 }
915
916 /* copy over in register buffer */
917 void gdb_target_to_reg(target_t *target, char *tstr, int str_len, uint8_t *bin)
918 {
919 if (str_len % 2)
920 {
921 LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
922 exit(-1);
923 }
924
925 int i;
926 for (i = 0; i < str_len; i += 2)
927 {
928 uint8_t t = hextoint(tstr[i]) << 4;
929 t |= hextoint(tstr[i+1]);
930
931 int j = gdb_reg_pos(target, i/2, str_len/2);
932 bin[j] = t;
933 }
934 }
935
936 int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
937 {
938 reg_t **reg_list;
939 int reg_list_size;
940 int retval;
941 int reg_packet_size = 0;
942 char *reg_packet;
943 char *reg_packet_p;
944 int i;
945
946 #ifdef _DEBUG_GDB_IO_
947 LOG_DEBUG("-");
948 #endif
949
950 if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
951 {
952 return gdb_error(connection, retval);
953 }
954
955 for (i = 0; i < reg_list_size; i++)
956 {
957 reg_packet_size += reg_list[i]->size;
958 }
959
960 reg_packet = malloc(CEIL(reg_packet_size, 8) * 2);
961 reg_packet_p = reg_packet;
962
963 for (i = 0; i < reg_list_size; i++)
964 {
965 gdb_str_to_target(target, reg_packet_p, reg_list[i]);
966 reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;
967 }
968
969 #ifdef _DEBUG_GDB_IO_
970 {
971 char *reg_packet_p;
972 reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
973 LOG_DEBUG("reg_packet: %s", reg_packet_p);
974 free(reg_packet_p);
975 }
976 #endif
977
978 gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);
979 free(reg_packet);
980
981 free(reg_list);
982
983 return ERROR_OK;
984 }
985
986 int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
987 {
988 int i;
989 reg_t **reg_list;
990 int reg_list_size;
991 int retval;
992 char *packet_p;
993
994 #ifdef _DEBUG_GDB_IO_
995 LOG_DEBUG("-");
996 #endif
997
998 /* skip command character */
999 packet++;
1000 packet_size--;
1001
1002 if (packet_size % 2)
1003 {
1004 LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection");
1005 return ERROR_SERVER_REMOTE_CLOSED;
1006 }
1007
1008 if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1009 {
1010 return gdb_error(connection, retval);
1011 }
1012
1013 packet_p = packet;
1014 for (i = 0; i < reg_list_size; i++)
1015 {
1016 uint8_t *bin_buf;
1017 int chars = (CEIL(reg_list[i]->size, 8) * 2);
1018
1019 if (packet_p + chars > packet + packet_size)
1020 {
1021 LOG_ERROR("BUG: register packet is too small for registers");
1022 }
1023
1024 reg_arch_type_t *arch_type;
1025 bin_buf = malloc(CEIL(reg_list[i]->size, 8));
1026 gdb_target_to_reg(target, packet_p, chars, bin_buf);
1027
1028 /* get register arch_type, and call set method */
1029 arch_type = register_get_arch_type(reg_list[i]->arch_type);
1030
1031 arch_type->set(reg_list[i], bin_buf);
1032
1033 /* advance packet pointer */
1034 packet_p += chars;
1035
1036
1037 free(bin_buf);
1038 }
1039
1040 /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
1041 free(reg_list);
1042
1043 gdb_put_packet(connection, "OK", 2);
1044
1045 return ERROR_OK;
1046 }
1047
1048 int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1049 {
1050 char *reg_packet;
1051 int reg_num = strtoul(packet + 1, NULL, 16);
1052 reg_t **reg_list;
1053 int reg_list_size;
1054 int retval;
1055
1056 #ifdef _DEBUG_GDB_IO_
1057 LOG_DEBUG("-");
1058 #endif
1059
1060 if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1061 {
1062 return gdb_error(connection, retval);
1063 }
1064
1065 if (reg_list_size <= reg_num)
1066 {
1067 LOG_ERROR("gdb requested a non-existing register");
1068 exit(-1);
1069 }
1070
1071 reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
1072
1073 gdb_str_to_target(target, reg_packet, reg_list[reg_num]);
1074
1075 gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2);
1076
1077 free(reg_list);
1078 free(reg_packet);
1079
1080 return ERROR_OK;
1081 }
1082
1083 int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1084 {
1085 char *separator;
1086 uint8_t *bin_buf;
1087 int reg_num = strtoul(packet + 1, &separator, 16);
1088 reg_t **reg_list;
1089 int reg_list_size;
1090 int retval;
1091 reg_arch_type_t *arch_type;
1092
1093 LOG_DEBUG("-");
1094
1095 if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1096 {
1097 return gdb_error(connection, retval);
1098 }
1099
1100 if (reg_list_size < reg_num)
1101 {
1102 LOG_ERROR("gdb requested a non-existing register");
1103 return ERROR_SERVER_REMOTE_CLOSED;
1104 }
1105
1106 if (*separator != '=')
1107 {
1108 LOG_ERROR("GDB 'set register packet', but no '=' following the register number");
1109 return ERROR_SERVER_REMOTE_CLOSED;
1110 }
1111
1112 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
1113 bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
1114 int chars = (CEIL(reg_list[reg_num]->size, 8) * 2);
1115
1116 /* fix!!! add some sanity checks on packet size here */
1117
1118 gdb_target_to_reg(target, separator + 1, chars, bin_buf);
1119
1120 /* get register arch_type, and call set method */
1121 arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
1122 arch_type->set(reg_list[reg_num], bin_buf);
1123
1124 gdb_put_packet(connection, "OK", 2);
1125
1126 free(bin_buf);
1127 free(reg_list);
1128
1129 return ERROR_OK;
1130 }
1131
1132 int gdb_error(connection_t *connection, int retval)
1133 {
1134 switch (retval)
1135 {
1136 case ERROR_TARGET_DATA_ABORT:
1137 gdb_send_error(connection, EIO);
1138 break;
1139 case ERROR_TARGET_TRANSLATION_FAULT:
1140 gdb_send_error(connection, EFAULT);
1141 break;
1142 case ERROR_TARGET_UNALIGNED_ACCESS:
1143 gdb_send_error(connection, EFAULT);
1144 break;
1145 case ERROR_TARGET_NOT_HALTED:
1146 gdb_send_error(connection, EFAULT);
1147 break;
1148 default:
1149 /* This could be that the target reset itself. */
1150 LOG_ERROR("unexpected error %i", retval);
1151 gdb_send_error(connection, EFAULT);
1152 break;
1153 }
1154
1155 return ERROR_OK;
1156 }
1157
1158 /* We don't have to worry about the default 2 second timeout for GDB packets,
1159 * because GDB breaks up large memory reads into smaller reads.
1160 *
1161 * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
1162 */
1163 int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1164 {
1165 char *separator;
1166 uint32_t addr = 0;
1167 uint32_t len = 0;
1168
1169 uint8_t *buffer;
1170 char *hex_buffer;
1171
1172 int retval = ERROR_OK;
1173
1174 /* skip command character */
1175 packet++;
1176
1177 addr = strtoul(packet, &separator, 16);
1178
1179 if (*separator != ',')
1180 {
1181 LOG_ERROR("incomplete read memory packet received, dropping connection");
1182 return ERROR_SERVER_REMOTE_CLOSED;
1183 }
1184
1185 len = strtoul(separator+1, NULL, 16);
1186
1187 buffer = malloc(len);
1188
1189 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1190
1191 retval = target_read_buffer(target, addr, len, buffer);
1192
1193 if ((retval != ERROR_OK)&&!gdb_report_data_abort)
1194 {
1195 /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
1196 * At some point this might be fixed in GDB, in which case this code can be removed.
1197 *
1198 * OpenOCD developers are acutely aware of this problem, but there is nothing
1199 * gained by involving the user in this problem that hopefully will get resolved
1200 * eventually
1201 *
1202 * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd = view%20audit-trail&database = gdb&pr = 2395
1203 *
1204 * For now, the default is to fix up things to make current GDB versions work.
1205 * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
1206 */
1207 memset(buffer, 0, len);
1208 retval = ERROR_OK;
1209 }
1210
1211 if (retval == ERROR_OK)
1212 {
1213 hex_buffer = malloc(len * 2 + 1);
1214
1215 uint32_t i;
1216 for (i = 0; i < len; i++)
1217 {
1218 uint8_t t = buffer[i];
1219 hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf];
1220 hex_buffer[2 * i + 1] = DIGITS[t & 0xf];
1221 }
1222
1223 gdb_put_packet(connection, hex_buffer, len * 2);
1224
1225 free(hex_buffer);
1226 }
1227 else
1228 {
1229 retval = gdb_error(connection, retval);
1230 }
1231
1232 free(buffer);
1233
1234 return retval;
1235 }
1236
1237 int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1238 {
1239 char *separator;
1240 uint32_t addr = 0;
1241 uint32_t len = 0;
1242
1243 uint8_t *buffer;
1244
1245 uint32_t i;
1246 int retval;
1247
1248 /* skip command character */
1249 packet++;
1250
1251 addr = strtoul(packet, &separator, 16);
1252
1253 if (*separator != ',')
1254 {
1255 LOG_ERROR("incomplete write memory packet received, dropping connection");
1256 return ERROR_SERVER_REMOTE_CLOSED;
1257 }
1258
1259 len = strtoul(separator+1, &separator, 16);
1260
1261 if (*(separator++) != ':')
1262 {
1263 LOG_ERROR("incomplete write memory packet received, dropping connection");
1264 return ERROR_SERVER_REMOTE_CLOSED;
1265 }
1266
1267 buffer = malloc(len);
1268
1269 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1270
1271 for (i = 0; i<len; i++)
1272 {
1273 uint32_t tmp;
1274 sscanf(separator + 2*i, "%2" SCNx32 , &tmp);
1275 buffer[i] = tmp;
1276 }
1277
1278 retval = target_write_buffer(target, addr, len, buffer);
1279
1280 if (retval == ERROR_OK)
1281 {
1282 gdb_put_packet(connection, "OK", 2);
1283 }
1284 else
1285 {
1286 retval = gdb_error(connection, retval);
1287 }
1288
1289 free(buffer);
1290
1291 return retval;
1292 }
1293
1294 int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1295 {
1296 char *separator;
1297 uint32_t addr = 0;
1298 uint32_t len = 0;
1299
1300 int retval;
1301
1302 /* skip command character */
1303 packet++;
1304
1305 addr = strtoul(packet, &separator, 16);
1306
1307 if (*separator != ',')
1308 {
1309 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1310 return ERROR_SERVER_REMOTE_CLOSED;
1311 }
1312
1313 len = strtoul(separator+1, &separator, 16);
1314
1315 if (*(separator++) != ':')
1316 {
1317 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1318 return ERROR_SERVER_REMOTE_CLOSED;
1319 }
1320
1321 retval = ERROR_OK;
1322 if (len)
1323 {
1324 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1325
1326 retval = target_write_buffer(target, addr, len, (uint8_t*)separator);
1327 }
1328
1329 if (retval == ERROR_OK)
1330 {
1331 gdb_put_packet(connection, "OK", 2);
1332 }
1333 else
1334 {
1335 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1336 return retval;
1337 }
1338
1339 return ERROR_OK;
1340 }
1341
1342 int gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1343 {
1344 int current = 0;
1345 uint32_t address = 0x0;
1346 int retval = ERROR_OK;
1347
1348 LOG_DEBUG("-");
1349
1350 if (packet_size > 1)
1351 {
1352 packet[packet_size] = 0;
1353 address = strtoul(packet + 1, NULL, 16);
1354 }
1355 else
1356 {
1357 current = 1;
1358 }
1359
1360 if (packet[0] == 'c')
1361 {
1362 LOG_DEBUG("continue");
1363 target_handle_event( target, TARGET_EVENT_OLD_pre_resume );
1364 retval = target_resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
1365 }
1366 else if (packet[0] == 's')
1367 {
1368 LOG_DEBUG("step");
1369 /* step at current or address, don't handle breakpoints */
1370 retval = target_step(target, current, address, 0);
1371 }
1372 return retval;
1373 }
1374
1375 int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1376 {
1377 int type;
1378 enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
1379 enum watchpoint_rw wp_type;
1380 uint32_t address;
1381 uint32_t size;
1382 char *separator;
1383 int retval;
1384
1385 LOG_DEBUG("-");
1386
1387 type = strtoul(packet + 1, &separator, 16);
1388
1389 if (type == 0) /* memory breakpoint */
1390 bp_type = BKPT_SOFT;
1391 else if (type == 1) /* hardware breakpoint */
1392 bp_type = BKPT_HARD;
1393 else if (type == 2) /* write watchpoint */
1394 wp_type = WPT_WRITE;
1395 else if (type == 3) /* read watchpoint */
1396 wp_type = WPT_READ;
1397 else if (type == 4) /* access watchpoint */
1398 wp_type = WPT_ACCESS;
1399
1400 if (gdb_breakpoint_override && ((bp_type == BKPT_SOFT)||(bp_type == BKPT_HARD)))
1401 {
1402 bp_type = gdb_breakpoint_override_type;
1403 }
1404
1405 if (*separator != ',')
1406 {
1407 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1408 return ERROR_SERVER_REMOTE_CLOSED;
1409 }
1410
1411 address = strtoul(separator+1, &separator, 16);
1412
1413 if (*separator != ',')
1414 {
1415 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1416 return ERROR_SERVER_REMOTE_CLOSED;
1417 }
1418
1419 size = strtoul(separator+1, &separator, 16);
1420
1421 switch (type)
1422 {
1423 case 0:
1424 case 1:
1425 if (packet[0] == 'Z')
1426 {
1427 if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
1428 {
1429 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1430 return retval;
1431 }
1432 else
1433 {
1434 gdb_put_packet(connection, "OK", 2);
1435 }
1436 }
1437 else
1438 {
1439 breakpoint_remove(target, address);
1440 gdb_put_packet(connection, "OK", 2);
1441 }
1442 break;
1443 case 2:
1444 case 3:
1445 case 4:
1446 {
1447 if (packet[0] == 'Z')
1448 {
1449 if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
1450 {
1451 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1452 return retval;
1453 }
1454 else
1455 {
1456 gdb_put_packet(connection, "OK", 2);
1457 }
1458 }
1459 else
1460 {
1461 watchpoint_remove(target, address);
1462 gdb_put_packet(connection, "OK", 2);
1463 }
1464 break;
1465 }
1466 default:
1467 break;
1468 }
1469
1470 return ERROR_OK;
1471 }
1472
1473 /* print out a string and allocate more space as needed, mainly used for XML at this point */
1474 void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, ...)
1475 {
1476 if (*retval != ERROR_OK)
1477 {
1478 return;
1479 }
1480 int first = 1;
1481
1482 for (;;)
1483 {
1484 if ((*xml == NULL) || (!first))
1485 {
1486 /* start by 0 to exercise all the code paths.
1487 * Need minimum 2 bytes to fit 1 char and 0 terminator. */
1488
1489 *size = *size * 2 + 2;
1490 char *t = *xml;
1491 *xml = realloc(*xml, *size);
1492 if (*xml == NULL)
1493 {
1494 if (t)
1495 free(t);
1496 *retval = ERROR_SERVER_REMOTE_CLOSED;
1497 return;
1498 }
1499 }
1500
1501 va_list ap;
1502 int ret;
1503 va_start(ap, fmt);
1504 ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
1505 va_end(ap);
1506 if ((ret > 0) && ((ret + 1) < *size - *pos))
1507 {
1508 *pos += ret;
1509 return;
1510 }
1511 /* there was just enough or not enough space, allocate more. */
1512 first = 0;
1513 }
1514 }
1515
1516 static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len)
1517 {
1518 char *separator;
1519
1520 /* Extract and NUL-terminate the annex. */
1521 *annex = buf;
1522 while (*buf && *buf != ':')
1523 buf++;
1524 if (*buf == '\0')
1525 return -1;
1526 *buf++ = 0;
1527
1528 /* After the read marker and annex, qXfer looks like a
1529 * traditional 'm' packet. */
1530
1531 *ofs = strtoul(buf, &separator, 16);
1532
1533 if (*separator != ',')
1534 return -1;
1535
1536 *len = strtoul(separator+1, NULL, 16);
1537
1538 return 0;
1539 }
1540
1541 int gdb_calc_blocksize(flash_bank_t *bank)
1542 {
1543 uint32_t i;
1544 uint32_t block_size = 0xffffffff;
1545
1546 /* loop through all sectors and return smallest sector size */
1547
1548 for (i = 0; i < (uint32_t)bank->num_sectors; i++)
1549 {
1550 if (bank->sectors[i].size < block_size)
1551 block_size = bank->sectors[i].size;
1552 }
1553
1554 return block_size;
1555 }
1556
1557 static int compare_bank (const void * a, const void * b)
1558 {
1559 flash_bank_t *b1, *b2;
1560 b1=*((flash_bank_t **)a);
1561 b2=*((flash_bank_t **)b);
1562
1563 if (b1->base == b2->base)
1564 {
1565 return 0;
1566 } else if (b1->base>b2->base)
1567 {
1568 return 1;
1569 } else
1570 {
1571 return -1;
1572 }
1573 }
1574
1575 int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1576 {
1577 command_context_t *cmd_ctx = connection->cmd_ctx;
1578 gdb_connection_t *gdb_connection = connection->priv;
1579
1580 if (strstr(packet, "qRcmd,"))
1581 {
1582 if (packet_size > 6)
1583 {
1584 char *cmd;
1585 int i;
1586 cmd = malloc((packet_size - 6)/2 + 1);
1587 for (i = 0; i < (packet_size - 6)/2; i++)
1588 {
1589 uint32_t tmp;
1590 sscanf(packet + 6 + 2*i, "%2" SCNx32 , &tmp);
1591 cmd[i] = tmp;
1592 }
1593 cmd[(packet_size - 6)/2] = 0x0;
1594
1595 /* We want to print all debug output to GDB connection */
1596 log_add_callback(gdb_log_callback, connection);
1597 target_call_timer_callbacks_now();
1598 command_run_line(cmd_ctx, cmd);
1599 target_call_timer_callbacks_now();
1600 log_remove_callback(gdb_log_callback, connection);
1601 free(cmd);
1602 }
1603 gdb_put_packet(connection, "OK", 2);
1604 return ERROR_OK;
1605 }
1606 else if (strstr(packet, "qCRC:"))
1607 {
1608 if (packet_size > 5)
1609 {
1610 int retval;
1611 char gdb_reply[10];
1612 char *separator;
1613 uint32_t checksum;
1614 uint32_t addr = 0;
1615 uint32_t len = 0;
1616
1617 /* skip command character */
1618 packet += 5;
1619
1620 addr = strtoul(packet, &separator, 16);
1621
1622 if (*separator != ',')
1623 {
1624 LOG_ERROR("incomplete read memory packet received, dropping connection");
1625 return ERROR_SERVER_REMOTE_CLOSED;
1626 }
1627
1628 len = strtoul(separator + 1, NULL, 16);
1629
1630 retval = target_checksum_memory(target, addr, len, &checksum);
1631
1632 if (retval == ERROR_OK)
1633 {
1634 snprintf(gdb_reply, 10, "C%8.8" PRIx32 "", checksum);
1635 gdb_put_packet(connection, gdb_reply, 9);
1636 }
1637 else
1638 {
1639 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1640 return retval;
1641 }
1642
1643 return ERROR_OK;
1644 }
1645 }
1646 else if (strstr(packet, "qSupported"))
1647 {
1648 /* we currently support packet size and qXfer:memory-map:read (if enabled)
1649 * disable qXfer:features:read for the moment */
1650 int retval = ERROR_OK;
1651 char *buffer = NULL;
1652 int pos = 0;
1653 int size = 0;
1654
1655 xml_printf(&retval, &buffer, &pos, &size,
1656 "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-;QStartNoAckMode+",
1657 (GDB_BUFFER_SIZE - 1), ((gdb_use_memory_map == 1) && (flash_get_bank_count()>0)) ? '+' : '-');
1658
1659 if (retval != ERROR_OK)
1660 {
1661 gdb_send_error(connection, 01);
1662 return ERROR_OK;
1663 }
1664
1665 gdb_put_packet(connection, buffer, strlen(buffer));
1666 free(buffer);
1667
1668 return ERROR_OK;
1669 }
1670 else if (strstr(packet, "qXfer:memory-map:read::") && (flash_get_bank_count()>0))
1671 {
1672 /* We get away with only specifying flash here. Regions that are not
1673 * specified are treated as if we provided no memory map(if not we
1674 * could detect the holes and mark them as RAM).
1675 * Normally we only execute this code once, but no big deal if we
1676 * have to regenerate it a couple of times. */
1677
1678 flash_bank_t *p;
1679 char *xml = NULL;
1680 int size = 0;
1681 int pos = 0;
1682 int retval = ERROR_OK;
1683
1684 int offset;
1685 int length;
1686 char *separator;
1687 int blocksize;
1688
1689 /* skip command character */
1690 packet += 23;
1691
1692 offset = strtoul(packet, &separator, 16);
1693 length = strtoul(separator + 1, &separator, 16);
1694
1695 xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
1696
1697 /*
1698 sort banks in ascending order, we need to make non-flash memory be ram(or rather
1699 read/write) by default for GDB.
1700 GDB does not have a concept of non-cacheable read/write memory.
1701 */
1702 flash_bank_t **banks = malloc(sizeof(flash_bank_t *)*flash_get_bank_count());
1703 int i;
1704
1705 for (i = 0; i<flash_get_bank_count(); i++)
1706 {
1707 p = get_flash_bank_by_num(i);
1708 if (p == NULL)
1709 {
1710 free(banks);
1711 retval = ERROR_FAIL;
1712 gdb_send_error(connection, retval);
1713 return retval;
1714 }
1715 banks[i]=p;
1716 }
1717
1718 qsort(banks, flash_get_bank_count(), sizeof(flash_bank_t *), compare_bank);
1719
1720 uint32_t ram_start = 0;
1721 for (i = 0; i<flash_get_bank_count(); i++)
1722 {
1723 p = banks[i];
1724
1725 if (ram_start<p->base)
1726 {
1727 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
1728 ram_start, p->base-ram_start);
1729 }
1730
1731 /* if device has uneven sector sizes, eg. str7, lpc
1732 * we pass the smallest sector size to gdb memory map */
1733 blocksize = gdb_calc_blocksize(p);
1734
1735 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" start=\"0x%x\" length=\"0x%x\">\n" \
1736 "<property name=\"blocksize\">0x%x</property>\n" \
1737 "</memory>\n", \
1738 p->base, p->size, blocksize);
1739 ram_start = p->base+p->size;
1740 }
1741 if (ram_start != 0)
1742 {
1743 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
1744 ram_start, 0-ram_start);
1745 } else
1746 {
1747 /* a flash chip could be at the very end of the 32 bit address space, in which case
1748 ram_start will be precisely 0 */
1749 }
1750
1751 free(banks);
1752 banks = NULL;
1753
1754 xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
1755
1756 if (retval != ERROR_OK)
1757 {
1758 gdb_send_error(connection, retval);
1759 return retval;
1760 }
1761
1762 if (offset + length > pos)
1763 {
1764 length = pos - offset;
1765 }
1766
1767 char *t = malloc(length + 1);
1768 t[0] = 'l';
1769 memcpy(t + 1, xml + offset, length);
1770 gdb_put_packet(connection, t, length + 1);
1771
1772 free(t);
1773 free(xml);
1774 return ERROR_OK;
1775 }
1776 else if (strstr(packet, "qXfer:features:read:"))
1777 {
1778 char *xml = NULL;
1779 int size = 0;
1780 int pos = 0;
1781 int retval = ERROR_OK;
1782
1783 int offset;
1784 unsigned int length;
1785 char *annex;
1786
1787 /* skip command character */
1788 packet += 20;
1789
1790 if (decode_xfer_read(packet, &annex, &offset, &length) < 0)
1791 {
1792 gdb_send_error(connection, 01);
1793 return ERROR_OK;
1794 }
1795
1796 if (strcmp(annex, "target.xml") != 0)
1797 {
1798 gdb_send_error(connection, 01);
1799 return ERROR_OK;
1800 }
1801
1802 xml_printf(&retval, &xml, &pos, &size, \
1803 "l<target version=\"1.0\">\n<architecture>arm</architecture>\n</target>\n");
1804
1805 if (retval != ERROR_OK)
1806 {
1807 gdb_send_error(connection, retval);
1808 return retval;
1809 }
1810
1811 gdb_put_packet(connection, xml, strlen(xml));
1812
1813 free(xml);
1814 return ERROR_OK;
1815 }
1816 else if (strstr(packet, "QStartNoAckMode"))
1817 {
1818 gdb_connection->noack_mode = 1;
1819 gdb_put_packet(connection, "OK", 2);
1820 return ERROR_OK;
1821 }
1822
1823 gdb_put_packet(connection, "", 0);
1824 return ERROR_OK;
1825 }
1826
1827 int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1828 {
1829 gdb_connection_t *gdb_connection = connection->priv;
1830 gdb_service_t *gdb_service = connection->service->priv;
1831 int result;
1832
1833 /* if flash programming disabled - send a empty reply */
1834
1835 if (gdb_flash_program == 0)
1836 {
1837 gdb_put_packet(connection, "", 0);
1838 return ERROR_OK;
1839 }
1840
1841 if (strstr(packet, "vFlashErase:"))
1842 {
1843 unsigned long addr;
1844 unsigned long length;
1845
1846 char *parse = packet + 12;
1847 if (*parse == '\0')
1848 {
1849 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1850 return ERROR_SERVER_REMOTE_CLOSED;
1851 }
1852
1853 addr = strtoul(parse, &parse, 16);
1854
1855 if (*(parse++) != ',' || *parse == '\0')
1856 {
1857 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1858 return ERROR_SERVER_REMOTE_CLOSED;
1859 }
1860
1861 length = strtoul(parse, &parse, 16);
1862
1863 if (*parse != '\0')
1864 {
1865 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1866 return ERROR_SERVER_REMOTE_CLOSED;
1867 }
1868
1869 /* assume all sectors need erasing - stops any problems
1870 * when flash_write is called multiple times */
1871 flash_set_dirty();
1872
1873 /* perform any target specific operations before the erase */
1874 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_START);
1875 result = flash_erase_address_range(gdb_service->target, addr, length );
1876 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_END);
1877
1878 /* perform erase */
1879 if (result != ERROR_OK)
1880 {
1881 /* GDB doesn't evaluate the actual error number returned,
1882 * treat a failed erase as an I/O error
1883 */
1884 gdb_send_error(connection, EIO);
1885 LOG_ERROR("flash_erase returned %i", result);
1886 }
1887 else
1888 gdb_put_packet(connection, "OK", 2);
1889
1890 return ERROR_OK;
1891 }
1892
1893 if (strstr(packet, "vFlashWrite:"))
1894 {
1895 int retval;
1896 unsigned long addr;
1897 unsigned long length;
1898 char *parse = packet + 12;
1899
1900 if (*parse == '\0')
1901 {
1902 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1903 return ERROR_SERVER_REMOTE_CLOSED;
1904 }
1905 addr = strtoul(parse, &parse, 16);
1906 if (*(parse++) != ':')
1907 {
1908 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1909 return ERROR_SERVER_REMOTE_CLOSED;
1910 }
1911 length = packet_size - (parse - packet);
1912
1913 /* create a new image if there isn't already one */
1914 if (gdb_connection->vflash_image == NULL)
1915 {
1916 gdb_connection->vflash_image = malloc(sizeof(image_t));
1917 image_open(gdb_connection->vflash_image, "", "build");
1918 }
1919
1920 /* create new section with content from packet buffer */
1921 if ((retval = image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (uint8_t*)parse)) != ERROR_OK)
1922 {
1923 return retval;
1924 }
1925
1926 gdb_put_packet(connection, "OK", 2);
1927
1928 return ERROR_OK;
1929 }
1930
1931 if (!strcmp(packet, "vFlashDone"))
1932 {
1933 uint32_t written;
1934
1935 /* process the flashing buffer. No need to erase as GDB
1936 * always issues a vFlashErase first. */
1937 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_START);
1938 result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0);
1939 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_END);
1940 if ( result != ERROR_OK)
1941 {
1942 if (result == ERROR_FLASH_DST_OUT_OF_BANK)
1943 gdb_put_packet(connection, "E.memtype", 9);
1944 else
1945 gdb_send_error(connection, EIO);
1946 }
1947 else
1948 {
1949 LOG_DEBUG("wrote %u bytes from vFlash image to flash", (unsigned)written);
1950 gdb_put_packet(connection, "OK", 2);
1951 }
1952
1953 image_close(gdb_connection->vflash_image);
1954 free(gdb_connection->vflash_image);
1955 gdb_connection->vflash_image = NULL;
1956
1957 return ERROR_OK;
1958 }
1959
1960 gdb_put_packet(connection, "", 0);
1961 return ERROR_OK;
1962 }
1963
1964 int gdb_detach(connection_t *connection, target_t *target)
1965 {
1966
1967 switch ( detach_mode )
1968 {
1969 case GDB_DETACH_RESUME:
1970 target_handle_event( target, TARGET_EVENT_OLD_pre_resume );
1971 target_resume(target, 1, 0, 1, 0);
1972 break;
1973
1974 case GDB_DETACH_RESET:
1975 /* FIX?? make this configurable?? */
1976 target_process_reset(connection->cmd_ctx, RESET_HALT);
1977 break;
1978
1979 case GDB_DETACH_HALT:
1980 target_halt(target);
1981 break;
1982
1983 case GDB_DETACH_NOTHING:
1984 break;
1985 }
1986
1987 gdb_put_packet(connection, "OK", 2);
1988 return ERROR_OK;
1989 }
1990
1991 static void gdb_log_callback(void *priv, const char *file, int line,
1992 const char *function, const char *string)
1993 {
1994 connection_t *connection = priv;
1995 gdb_connection_t *gdb_con = connection->priv;
1996
1997 if (gdb_con->busy)
1998 {
1999 /* do not reply this using the O packet */
2000 return;
2001 }
2002
2003 gdb_output_con(connection, string);
2004 }
2005
2006 /* Do not allocate this on the stack */
2007 char gdb_packet_buffer[GDB_BUFFER_SIZE];
2008
2009 static void gdb_sig_halted(connection_t *connection)
2010 {
2011 char sig_reply[4];
2012 snprintf(sig_reply, 4, "T%2.2x", 2);
2013 gdb_put_packet(connection, sig_reply, 3);
2014
2015 }
2016
2017 int gdb_input_inner(connection_t *connection)
2018 {
2019 gdb_service_t *gdb_service = connection->service->priv;
2020 target_t *target = gdb_service->target;
2021 char *packet = gdb_packet_buffer;
2022 int packet_size;
2023 int retval;
2024 gdb_connection_t *gdb_con = connection->priv;
2025 static int extended_protocol = 0;
2026
2027 /* drain input buffer */
2028 do
2029 {
2030 packet_size = GDB_BUFFER_SIZE-1;
2031 if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)
2032 {
2033 return retval;
2034 }
2035
2036 /* terminate with zero */
2037 packet[packet_size] = 0;
2038
2039 if ( LOG_LEVEL_IS( LOG_LVL_DEBUG ) ){
2040 if ( packet[0] == 'X' ){
2041 // binary packets spew junk into the debug log stream
2042 char buf[ 50 ];
2043 int x;
2044 for ( x = 0 ; (x < 49) && (packet[x] != ':') ; x++ ){
2045 buf[x] = packet[x];
2046 }
2047 buf[x] = 0;
2048 LOG_DEBUG("received packet: '%s:<binary-data>'", buf );
2049 } else {
2050 LOG_DEBUG("received packet: '%s'", packet );
2051 }
2052 }
2053
2054 if (packet_size > 0)
2055 {
2056 retval = ERROR_OK;
2057 switch (packet[0])
2058 {
2059 case 'H':
2060 /* Hct... -- set thread
2061 * we don't have threads, send empty reply */
2062 gdb_put_packet(connection, NULL, 0);
2063 break;
2064 case 'q':
2065 case 'Q':
2066 retval = gdb_query_packet(connection, target, packet, packet_size);
2067 break;
2068 case 'g':
2069 retval = gdb_get_registers_packet(connection, target, packet, packet_size);
2070 break;
2071 case 'G':
2072 retval = gdb_set_registers_packet(connection, target, packet, packet_size);
2073 break;
2074 case 'p':
2075 retval = gdb_get_register_packet(connection, target, packet, packet_size);
2076 break;
2077 case 'P':
2078 retval = gdb_set_register_packet(connection, target, packet, packet_size);
2079 break;
2080 case 'm':
2081 retval = gdb_read_memory_packet(connection, target, packet, packet_size);
2082 break;
2083 case 'M':
2084 retval = gdb_write_memory_packet(connection, target, packet, packet_size);
2085 break;
2086 case 'z':
2087 case 'Z':
2088 retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
2089 break;
2090 case '?':
2091 gdb_last_signal_packet(connection, target, packet, packet_size);
2092 break;
2093 case 'c':
2094 case 's':
2095 {
2096 if (target->state != TARGET_HALTED)
2097 {
2098 /* If the target isn't in the halted state, then we can't
2099 * step/continue. This might be early setup, etc.
2100 */
2101 gdb_sig_halted(connection);
2102 } else
2103 {
2104 /* We're running/stepping, in which case we can
2105 * forward log output until the target is halted
2106 */
2107 gdb_connection_t *gdb_con = connection->priv;
2108 gdb_con->frontend_state = TARGET_RUNNING;
2109 log_add_callback(gdb_log_callback, connection);
2110 target_call_event_callbacks(target, TARGET_EVENT_GDB_START);
2111 int retval = gdb_step_continue_packet(connection, target, packet, packet_size);
2112 if (retval != ERROR_OK)
2113 {
2114 /* we'll never receive a halted condition... issue a false one.. */
2115 gdb_frontend_halted(target, connection);
2116 }
2117 }
2118 }
2119 break;
2120 case 'v':
2121 retval = gdb_v_packet(connection, target, packet, packet_size);
2122 break;
2123 case 'D':
2124 retval = gdb_detach(connection, target);
2125 extended_protocol = 0;
2126 break;
2127 case 'X':
2128 if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)
2129 return retval;
2130 break;
2131 case 'k':
2132 if (extended_protocol != 0)
2133 break;
2134 gdb_put_packet(connection, "OK", 2);
2135 return ERROR_SERVER_REMOTE_CLOSED;
2136 case '!':
2137 /* handle extended remote protocol */
2138 extended_protocol = 1;
2139 gdb_put_packet(connection, "OK", 2);
2140 break;
2141 case 'R':
2142 /* handle extended restart packet */
2143 breakpoint_clear_target(gdb_service->target);
2144 watchpoint_clear_target(gdb_service->target);
2145 command_run_linef(connection->cmd_ctx, "ocd_gdb_restart %d", get_num_by_target(target));
2146 break;
2147 default:
2148 /* ignore unkown packets */
2149 LOG_DEBUG("ignoring 0x%2.2x packet", packet[0]);
2150 gdb_put_packet(connection, NULL, 0);
2151 break;
2152 }
2153
2154 /* if a packet handler returned an error, exit input loop */
2155 if (retval != ERROR_OK)
2156 return retval;
2157 }
2158
2159 if (gdb_con->ctrl_c)
2160 {
2161 if (target->state == TARGET_RUNNING)
2162 {
2163 target_halt(target);
2164 gdb_con->ctrl_c = 0;
2165 }
2166 }
2167
2168 } while (gdb_con->buf_cnt > 0);
2169
2170 return ERROR_OK;
2171 }
2172
2173 int gdb_input(connection_t *connection)
2174 {
2175 int retval = gdb_input_inner(connection);
2176 gdb_connection_t *gdb_con = connection->priv;
2177 if (retval == ERROR_SERVER_REMOTE_CLOSED)
2178 return retval;
2179
2180 /* logging does not propagate the error, yet can set the gdb_con->closed flag */
2181 if (gdb_con->closed)
2182 return ERROR_SERVER_REMOTE_CLOSED;
2183
2184 /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
2185 return ERROR_OK;
2186 }
2187
2188 int gdb_init(void)
2189 {
2190 gdb_service_t *gdb_service;
2191 target_t *target = all_targets;
2192
2193 if (!target)
2194 {
2195 LOG_WARNING("no gdb ports allocated as no target has been specified");
2196 return ERROR_OK;
2197 }
2198
2199 if (gdb_port == 0 && server_use_pipes == 0)
2200 {
2201 LOG_INFO("gdb port disabled");
2202 return ERROR_OK;
2203 }
2204
2205 if (server_use_pipes)
2206 {
2207 /* only a single gdb connection when using a pipe */
2208
2209 gdb_service = malloc(sizeof(gdb_service_t));
2210 gdb_service->target = target;
2211
2212 add_service("gdb", CONNECTION_PIPE, 0, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
2213
2214 LOG_DEBUG("gdb service for target %s using pipes",
2215 target_get_name(target));
2216 }
2217 else
2218 {
2219 while (target)
2220 {
2221 gdb_service = malloc(sizeof(gdb_service_t));
2222 gdb_service->target = target;
2223
2224 add_service("gdb", CONNECTION_TCP, gdb_port + target->target_number, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
2225
2226 LOG_DEBUG("gdb service for target %s at port %i",
2227 target_get_name(target),
2228 gdb_port + target->target_number);
2229 target = target->next;
2230 }
2231 }
2232
2233 return ERROR_OK;
2234 }
2235
2236 /* daemon configuration command gdb_port */
2237 int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2238 {
2239 if (argc == 0)
2240 {
2241 command_print(cmd_ctx, "%d", gdb_port);
2242 return ERROR_OK;
2243 }
2244
2245 /* only if the port wasn't overwritten by cmdline */
2246 if (gdb_port == 0)
2247 gdb_port = strtoul(args[0], NULL, 0);
2248
2249 return ERROR_OK;
2250 }
2251
2252 int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2253 {
2254 if (argc == 1)
2255 {
2256 if (strcmp(args[0], "resume") == 0)
2257 {
2258 detach_mode = GDB_DETACH_RESUME;
2259 return ERROR_OK;
2260 }
2261 else if (strcmp(args[0], "reset") == 0)
2262 {
2263 detach_mode = GDB_DETACH_RESET;
2264 return ERROR_OK;
2265 }
2266 else if (strcmp(args[0], "halt") == 0)
2267 {
2268 detach_mode = GDB_DETACH_HALT;
2269 return ERROR_OK;
2270 }
2271 else if (strcmp(args[0], "nothing") == 0)
2272 {
2273 detach_mode = GDB_DETACH_NOTHING;
2274 return ERROR_OK;
2275 }
2276 else
2277 LOG_WARNING("invalid gdb_detach configuration directive: %s", args[0]);
2278 }
2279
2280 return ERROR_COMMAND_SYNTAX_ERROR;
2281 }
2282
2283 int handle_gdb_memory_map_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2284 {
2285 if (argc == 1)
2286 {
2287 if (strcmp(args[0], "enable") == 0)
2288 {
2289 gdb_use_memory_map = 1;
2290 return ERROR_OK;
2291 }
2292 else if (strcmp(args[0], "disable") == 0)
2293 {
2294 gdb_use_memory_map = 0;
2295 return ERROR_OK;
2296 }
2297 else
2298 LOG_WARNING("invalid gdb_memory_map configuration directive %s", args[0]);
2299 }
2300
2301 return ERROR_COMMAND_SYNTAX_ERROR;
2302 }
2303
2304 int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2305 {
2306 if (argc == 1)
2307 {
2308 if (strcmp(args[0], "enable") == 0)
2309 {
2310 gdb_flash_program = 1;
2311 return ERROR_OK;
2312 }
2313 else if (strcmp(args[0], "disable") == 0)
2314 {
2315 gdb_flash_program = 0;
2316 return ERROR_OK;
2317 }
2318 else
2319 LOG_WARNING("invalid gdb_flash_program configuration directive: %s", args[0]);
2320 }
2321
2322 return ERROR_COMMAND_SYNTAX_ERROR;
2323 }
2324
2325 int handle_gdb_report_data_abort_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2326 {
2327 if (argc == 1)
2328 {
2329 if (strcmp(args[0], "enable") == 0)
2330 {
2331 gdb_report_data_abort = 1;
2332 return ERROR_OK;
2333 }
2334 else if (strcmp(args[0], "disable") == 0)
2335 {
2336 gdb_report_data_abort = 0;
2337 return ERROR_OK;
2338 }
2339 else
2340 LOG_WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]);
2341 }
2342
2343 return ERROR_COMMAND_SYNTAX_ERROR;
2344 }
2345
2346 /* gdb_breakpoint_override */
2347 int handle_gdb_breakpoint_override_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2348 {
2349 if (argc == 0)
2350 {
2351
2352 } else if (argc == 1)
2353 {
2354 gdb_breakpoint_override = 1;
2355 if (strcmp(args[0], "hard") == 0)
2356 {
2357 gdb_breakpoint_override_type = BKPT_HARD;
2358 } else if (strcmp(args[0], "soft") == 0)
2359 {
2360 gdb_breakpoint_override_type = BKPT_SOFT;
2361 } else if (strcmp(args[0], "disable") == 0)
2362 {
2363 gdb_breakpoint_override = 0;
2364 }
2365 } else
2366 {
2367 return ERROR_COMMAND_SYNTAX_ERROR;
2368 }
2369 if (gdb_breakpoint_override)
2370 {
2371 LOG_USER("force %s breakpoints", (gdb_breakpoint_override_type == BKPT_HARD)?"hard":"soft");
2372 } else
2373 {
2374 LOG_USER("breakpoint type is not overriden");
2375 }
2376
2377 return ERROR_OK;
2378 }
2379
2380 int gdb_register_commands(command_context_t *command_context)
2381 {
2382 register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
2383 COMMAND_ANY, "daemon configuration command gdb_port");
2384 register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,
2385 COMMAND_CONFIG, "resume/reset/halt/nothing - "
2386 "specify behavior when GDB detaches from the target");
2387 register_command(command_context, NULL, "gdb_memory_map", handle_gdb_memory_map_command,
2388 COMMAND_CONFIG, "enable or disable memory map");
2389 register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,
2390 COMMAND_CONFIG, "enable or disable flash program");
2391 register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command,
2392 COMMAND_CONFIG, "enable or disable reporting data aborts");
2393 register_command(command_context, NULL, "gdb_breakpoint_override", handle_gdb_breakpoint_override_command,
2394 COMMAND_EXEC, "hard/soft/disable - force breakpoint type for gdb 'break' commands.");
2395 return ERROR_OK;
2396 }
Official OpenOCD Mirror