gdb: fix blank line at top
[openocd.git] / src / server / gdb_server.c
1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * Copyright (C) 2007-2010 √ėyvind 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 <target/breakpoints.h>
31 #include <target/target_request.h>
32 #include <target/register.h>
33 #include "server.h"
34 #include <flash/nor/core.h>
35 #include "gdb_server.h"
36 #include <target/image.h>
37 #include <jtag/jtag.h>
38
39
40 /**
41 * @file
42 * GDB server implementation.
43 *
44 * This implements the GDB Remote Serial Protocol, over TCP connections,
45 * giving GDB access to the JTAG or other hardware debugging facilities
46 * found in most modern embedded processors.
47 */
48
49 /* private connection data for GDB */
50 struct gdb_connection
51 {
52 char buffer[GDB_BUFFER_SIZE];
53 char *buf_p;
54 int buf_cnt;
55 int ctrl_c;
56 enum target_state frontend_state;
57 struct image *vflash_image;
58 int closed;
59 int busy;
60 int noack_mode;
61 bool sync; /* set flag to true if you want the next stepi to return immediately.
62 allowing GDB to pick up a fresh set of register values from the target
63 without modifying the target state. */
64 /* We delay reporting memory write errors until next step/continue or memory
65 * write. This improves performance of gdb load significantly as the GDB packet
66 * can be replied immediately and a new GDB packet will be ready without delay
67 * (ca. 10% or so...).
68 */
69 bool mem_write_error;
70 };
71
72
73 #if 0
74 #define _DEBUG_GDB_IO_
75 #endif
76
77 static struct gdb_connection *current_gdb_connection;
78
79 static int gdb_breakpoint_override;
80 static enum breakpoint_type gdb_breakpoint_override_type;
81
82 static int gdb_error(struct connection *connection, int retval);
83 static unsigned short gdb_port = 3333;
84 static unsigned short gdb_port_next = 0;
85 static const char DIGITS[16] = "0123456789abcdef";
86
87 static void gdb_log_callback(void *priv, const char *file, unsigned line,
88 const char *function, const char *string);
89
90 /* number of gdb connections, mainly to suppress gdb related debugging spam
91 * in helper/log.c when no gdb connections are actually active */
92 int gdb_actual_connections;
93
94 /* set if we are sending a memory map to gdb
95 * via qXfer:memory-map:read packet */
96 /* enabled by default*/
97 static int gdb_use_memory_map = 1;
98 /* enabled by default*/
99 static int gdb_flash_program = 1;
100
101 /* if set, data aborts cause an error to be reported in memory read packets
102 * see the code in gdb_read_memory_packet() for further explanations.
103 * Disabled by default.
104 */
105 static int gdb_report_data_abort;
106
107 static int gdb_last_signal(struct target *target)
108 {
109 switch (target->debug_reason)
110 {
111 case DBG_REASON_DBGRQ:
112 return 0x2; /* SIGINT */
113 case DBG_REASON_BREAKPOINT:
114 case DBG_REASON_WATCHPOINT:
115 case DBG_REASON_WPTANDBKPT:
116 return 0x05; /* SIGTRAP */
117 case DBG_REASON_SINGLESTEP:
118 return 0x05; /* SIGTRAP */
119 case DBG_REASON_NOTHALTED:
120 return 0x0; /* no signal... shouldn't happen */
121 default:
122 LOG_USER("undefined debug reason %d - target needs reset", target->debug_reason);
123 return 0x0;
124 }
125 }
126
127 static int check_pending(struct connection *connection,
128 int timeout_s, int *got_data)
129 {
130 /* a non-blocking socket will block if there is 0 bytes available on the socket,
131 * but return with as many bytes as are available immediately
132 */
133 struct timeval tv;
134 fd_set read_fds;
135 struct gdb_connection *gdb_con = connection->priv;
136 int t;
137 if (got_data == NULL)
138 got_data=&t;
139 *got_data = 0;
140
141 if (gdb_con->buf_cnt > 0)
142 {
143 *got_data = 1;
144 return ERROR_OK;
145 }
146
147 FD_ZERO(&read_fds);
148 FD_SET(connection->fd, &read_fds);
149
150 tv.tv_sec = timeout_s;
151 tv.tv_usec = 0;
152 if (socket_select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0)
153 {
154 /* This can typically be because a "monitor" command took too long
155 * before printing any progress messages
156 */
157 if (timeout_s > 0)
158 {
159 return ERROR_GDB_TIMEOUT;
160 } else
161 {
162 return ERROR_OK;
163 }
164 }
165 *got_data = FD_ISSET(connection->fd, &read_fds) != 0;
166 return ERROR_OK;
167 }
168
169 static int gdb_get_char_inner(struct connection *connection, int* next_char)
170 {
171 struct gdb_connection *gdb_con = connection->priv;
172 int retval = ERROR_OK;
173
174 #ifdef _DEBUG_GDB_IO_
175 char *debug_buffer;
176 #endif
177 for (;;)
178 {
179 if (connection->service->type == CONNECTION_PIPE)
180 {
181 gdb_con->buf_cnt = read(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
182 }
183 else
184 {
185 retval = check_pending(connection, 1, NULL);
186 if (retval != ERROR_OK)
187 return retval;
188 gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
189 }
190
191 if (gdb_con->buf_cnt > 0)
192 {
193 break;
194 }
195 if (gdb_con->buf_cnt == 0)
196 {
197 gdb_con->closed = 1;
198 return ERROR_SERVER_REMOTE_CLOSED;
199 }
200
201 #ifdef _WIN32
202 errno = WSAGetLastError();
203
204 switch (errno)
205 {
206 case WSAEWOULDBLOCK:
207 usleep(1000);
208 break;
209 case WSAECONNABORTED:
210 gdb_con->closed = 1;
211 return ERROR_SERVER_REMOTE_CLOSED;
212 case WSAECONNRESET:
213 gdb_con->closed = 1;
214 return ERROR_SERVER_REMOTE_CLOSED;
215 default:
216 LOG_ERROR("read: %d", errno);
217 exit(-1);
218 }
219 #else
220 switch (errno)
221 {
222 case EAGAIN:
223 usleep(1000);
224 break;
225 case ECONNABORTED:
226 gdb_con->closed = 1;
227 return ERROR_SERVER_REMOTE_CLOSED;
228 case ECONNRESET:
229 gdb_con->closed = 1;
230 return ERROR_SERVER_REMOTE_CLOSED;
231 default:
232 LOG_ERROR("read: %s", strerror(errno));
233 gdb_con->closed = 1;
234 return ERROR_SERVER_REMOTE_CLOSED;
235 }
236 #endif
237 }
238
239 #ifdef _DEBUG_GDB_IO_
240 debug_buffer = malloc(gdb_con->buf_cnt + 1);
241 memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt);
242 debug_buffer[gdb_con->buf_cnt] = 0;
243 LOG_DEBUG("received '%s'", debug_buffer);
244 free(debug_buffer);
245 #endif
246
247 gdb_con->buf_p = gdb_con->buffer;
248 gdb_con->buf_cnt--;
249 *next_char = *(gdb_con->buf_p++);
250 if (gdb_con->buf_cnt > 0)
251 connection->input_pending = 1;
252 else
253 connection->input_pending = 0;
254 #ifdef _DEBUG_GDB_IO_
255 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
256 #endif
257
258 return retval;
259 }
260
261 /**
262 * The cool thing about this fn is that it allows buf_p and buf_cnt to be
263 * held in registers in the inner loop.
264 *
265 * For small caches and embedded systems this is important!
266 */
267 static inline int gdb_get_char_fast(struct connection *connection, int* next_char, char **buf_p, int *buf_cnt)
268 {
269 int retval = ERROR_OK;
270
271 if ((*buf_cnt)-- > 0)
272 {
273 *next_char = **buf_p;
274 (*buf_p)++;
275 if (*buf_cnt > 0)
276 connection->input_pending = 1;
277 else
278 connection->input_pending = 0;
279
280 #ifdef _DEBUG_GDB_IO_
281 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
282 #endif
283
284 return ERROR_OK;
285 }
286
287 struct gdb_connection *gdb_con = connection->priv;
288 gdb_con->buf_p = *buf_p;
289 gdb_con->buf_cnt = *buf_cnt;
290 retval = gdb_get_char_inner(connection, next_char);
291 *buf_p = gdb_con->buf_p;
292 *buf_cnt = gdb_con->buf_cnt;
293
294 return retval;
295 }
296
297
298 static int gdb_get_char(struct connection *connection, int* next_char)
299 {
300 struct gdb_connection *gdb_con = connection->priv;
301 return gdb_get_char_fast(connection, next_char, &gdb_con->buf_p, &gdb_con->buf_cnt);
302 }
303
304
305 static int gdb_putback_char(struct connection *connection, int last_char)
306 {
307 struct gdb_connection *gdb_con = connection->priv;
308
309 if (gdb_con->buf_p > gdb_con->buffer)
310 {
311 *(--gdb_con->buf_p) = last_char;
312 gdb_con->buf_cnt++;
313 }
314 else
315 {
316 LOG_ERROR("BUG: couldn't put character back");
317 }
318
319 return ERROR_OK;
320 }
321
322 /* The only way we can detect that the socket is closed is the first time
323 * we write to it, we will fail. Subsequent write operations will
324 * succeed. Shudder! */
325 static int gdb_write(struct connection *connection, void *data, int len)
326 {
327 struct gdb_connection *gdb_con = connection->priv;
328 if (gdb_con->closed)
329 return ERROR_SERVER_REMOTE_CLOSED;
330
331 if (connection->service->type == CONNECTION_PIPE)
332 {
333 /* write to stdout */
334 if (write(STDOUT_FILENO, data, len) == len)
335 {
336 return ERROR_OK;
337 }
338 }
339 else
340 {
341 if (write_socket(connection->fd, data, len) == len)
342 {
343 return ERROR_OK;
344 }
345 }
346 gdb_con->closed = 1;
347 return ERROR_SERVER_REMOTE_CLOSED;
348 }
349
350 static int gdb_put_packet_inner(struct connection *connection,
351 char *buffer, int len)
352 {
353 int i;
354 unsigned char my_checksum = 0;
355 #ifdef _DEBUG_GDB_IO_
356 char *debug_buffer;
357 #endif
358 int reply;
359 int retval;
360 struct gdb_connection *gdb_con = connection->priv;
361
362 for (i = 0; i < len; i++)
363 my_checksum += buffer[i];
364
365 #ifdef _DEBUG_GDB_IO_
366 /*
367 * At this point we should have nothing in the input queue from GDB,
368 * however sometimes '-' is sent even though we've already received
369 * an ACK (+) for everything we've sent off.
370 */
371 int gotdata;
372 for (;;)
373 {
374 retval = check_pending(connection, 0, &gotdata);
375 if (retval != ERROR_OK)
376 return retval;
377 if (!gotdata)
378 break;
379 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
380 return retval;
381 if (reply == '$') {
382 /* fix a problem with some IAR tools */
383 gdb_putback_char(connection, reply);
384 LOG_DEBUG("Unexpected start of new packet");
385 break;
386 }
387
388 LOG_WARNING("Discard unexpected char %c", reply);
389 }
390 #endif
391
392 while (1)
393 {
394 #ifdef _DEBUG_GDB_IO_
395 debug_buffer = malloc(len + 1);
396 memcpy(debug_buffer, buffer, len);
397 debug_buffer[len] = 0;
398 LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
399 free(debug_buffer);
400 #endif
401
402 char local_buffer[1024];
403 local_buffer[0] = '$';
404 if ((size_t)len + 4 <= sizeof(local_buffer))
405 {
406 /* performance gain on smaller packets by only a single call to gdb_write() */
407 memcpy(local_buffer + 1, buffer, len++);
408 local_buffer[len++] = '#';
409 local_buffer[len++] = DIGITS[(my_checksum >> 4) & 0xf];
410 local_buffer[len++] = DIGITS[my_checksum & 0xf];
411 if ((retval = gdb_write(connection, local_buffer, len)) != ERROR_OK)
412 {
413 return retval;
414 }
415 }
416 else
417 {
418 /* larger packets are transmitted directly from caller supplied buffer
419 by several calls to gdb_write() to avoid dynamic allocation */
420 local_buffer[1] = '#';
421 local_buffer[2] = DIGITS[(my_checksum >> 4) & 0xf];
422 local_buffer[3] = DIGITS[my_checksum & 0xf];
423 if ((retval = gdb_write(connection, local_buffer, 1)) != ERROR_OK)
424 {
425 return retval;
426 }
427 if ((retval = gdb_write(connection, buffer, len)) != ERROR_OK)
428 {
429 return retval;
430 }
431 if ((retval = gdb_write(connection, local_buffer + 1, 3)) != ERROR_OK)
432 {
433 return retval;
434 }
435 }
436
437 if (gdb_con->noack_mode)
438 break;
439
440 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
441 return retval;
442
443 if (reply == '+')
444 break;
445 else if (reply == '-')
446 {
447 /* Stop sending output packets for now */
448 log_remove_callback(gdb_log_callback, connection);
449 LOG_WARNING("negative reply, retrying");
450 }
451 else if (reply == 0x3)
452 {
453 gdb_con->ctrl_c = 1;
454 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
455 return retval;
456 if (reply == '+')
457 break;
458 else if (reply == '-')
459 {
460 /* Stop sending output packets for now */
461 log_remove_callback(gdb_log_callback, connection);
462 LOG_WARNING("negative reply, retrying");
463 }
464 else if (reply == '$') {
465 LOG_ERROR("GDB missing ack(1) - assumed good");
466 gdb_putback_char(connection, reply);
467 return ERROR_OK;
468 } else {
469
470 LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply);
471 gdb_con->closed = 1;
472 return ERROR_SERVER_REMOTE_CLOSED;
473 }
474 }
475 else if (reply == '$') {
476 LOG_ERROR("GDB missing ack(2) - assumed good");
477 gdb_putback_char(connection, reply);
478 return ERROR_OK;
479 }
480 else
481 {
482 LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection", reply);
483 gdb_con->closed = 1;
484 return ERROR_SERVER_REMOTE_CLOSED;
485 }
486 }
487 if (gdb_con->closed)
488 return ERROR_SERVER_REMOTE_CLOSED;
489
490 return ERROR_OK;
491 }
492
493 static int gdb_put_packet(struct connection *connection, char *buffer, int len)
494 {
495 struct gdb_connection *gdb_con = connection->priv;
496 gdb_con->busy = 1;
497 int retval = gdb_put_packet_inner(connection, buffer, len);
498 gdb_con->busy = 0;
499
500 /* we sent some data, reset timer for keep alive messages */
501 kept_alive();
502
503 return retval;
504 }
505
506 static __inline__ int fetch_packet(struct connection *connection, int *checksum_ok, int noack, int *len, char *buffer)
507 {
508 unsigned char my_checksum = 0;
509 char checksum[3];
510 int character;
511 int retval = ERROR_OK;
512
513 struct gdb_connection *gdb_con = connection->priv;
514 my_checksum = 0;
515 int count = 0;
516 count = 0;
517
518 /* move this over into local variables to use registers and give the
519 * more freedom to optimize */
520 char *buf_p = gdb_con->buf_p;
521 int buf_cnt = gdb_con->buf_cnt;
522
523 for (;;)
524 {
525 /* The common case is that we have an entire packet with no escape chars.
526 * We need to leave at least 2 bytes in the buffer to have
527 * gdb_get_char() update various bits and bobs correctly.
528 */
529 if ((buf_cnt > 2) && ((buf_cnt + count) < *len))
530 {
531 /* The compiler will struggle a bit with constant propagation and
532 * aliasing, so we help it by showing that these values do not
533 * change inside the loop
534 */
535 int i;
536 char *buf = buf_p;
537 int run = buf_cnt - 2;
538 i = 0;
539 int done = 0;
540 while (i < run)
541 {
542 character = *buf++;
543 i++;
544 if (character == '#')
545 {
546 /* Danger! character can be '#' when esc is
547 * used so we need an explicit boolean for done here.
548 */
549 done = 1;
550 break;
551 }
552
553 if (character == '}')
554 {
555 /* data transmitted in binary mode (X packet)
556 * uses 0x7d as escape character */
557 my_checksum += character & 0xff;
558 character = *buf++;
559 i++;
560 my_checksum += character & 0xff;
561 buffer[count++] = (character ^ 0x20) & 0xff;
562 }
563 else
564 {
565 my_checksum += character & 0xff;
566 buffer[count++] = character & 0xff;
567 }
568 }
569 buf_p += i;
570 buf_cnt -= i;
571 if (done)
572 break;
573 }
574 if (count > *len)
575 {
576 LOG_ERROR("packet buffer too small");
577 retval = ERROR_GDB_BUFFER_TOO_SMALL;
578 break;
579 }
580
581 retval = gdb_get_char_fast(connection, &character, &buf_p, &buf_cnt);
582 if (retval != ERROR_OK)
583 break;
584
585 if (character == '#')
586 break;
587
588 if (character == '}')
589 {
590 /* data transmitted in binary mode (X packet)
591 * uses 0x7d as escape character */
592 my_checksum += character & 0xff;
593
594 retval = gdb_get_char_fast(connection, &character, &buf_p, &buf_cnt);
595 if (retval != ERROR_OK)
596 break;
597
598 my_checksum += character & 0xff;
599 buffer[count++] = (character ^ 0x20) & 0xff;
600 }
601 else
602 {
603 my_checksum += character & 0xff;
604 buffer[count++] = character & 0xff;
605 }
606 }
607
608 gdb_con->buf_p = buf_p;
609 gdb_con->buf_cnt = buf_cnt;
610
611 if (retval != ERROR_OK)
612 return retval;
613
614 *len = count;
615
616 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
617 return retval;
618 checksum[0] = character;
619 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
620 return retval;
621 checksum[1] = character;
622 checksum[2] = 0;
623
624 if (!noack)
625 {
626 *checksum_ok = (my_checksum == strtoul(checksum, NULL, 16));
627 }
628
629 return ERROR_OK;
630 }
631
632 static int gdb_get_packet_inner(struct connection *connection,
633 char *buffer, int *len)
634 {
635 int character;
636 int retval;
637 struct gdb_connection *gdb_con = connection->priv;
638
639 while (1)
640 {
641 do
642 {
643 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
644 return retval;
645
646 #ifdef _DEBUG_GDB_IO_
647 LOG_DEBUG("character: '%c'", character);
648 #endif
649
650 switch (character)
651 {
652 case '$':
653 break;
654 case '+':
655 /* gdb sends a dummy ack '+' at every remote connect - see remote_start_remote (remote.c)
656 * in case anyone tries to debug why they receive this warning every time */
657 LOG_WARNING("acknowledgment received, but no packet pending");
658 break;
659 case '-':
660 LOG_WARNING("negative acknowledgment, but no packet pending");
661 break;
662 case 0x3:
663 gdb_con->ctrl_c = 1;
664 *len = 0;
665 return ERROR_OK;
666 default:
667 LOG_WARNING("ignoring character 0x%x", character);
668 break;
669 }
670 } while (character != '$');
671
672
673
674 int checksum_ok = 0;
675 /* explicit code expansion here to get faster inlined code in -O3 by not
676 * calculating checksum
677 */
678 if (gdb_con->noack_mode)
679 {
680 if ((retval = fetch_packet(connection, &checksum_ok, 1, len, buffer)) != ERROR_OK)
681 return retval;
682 } else
683 {
684 if ((retval = fetch_packet(connection, &checksum_ok, 0, len, buffer)) != ERROR_OK)
685 return retval;
686 }
687
688 if (gdb_con->noack_mode)
689 {
690 /* checksum is not checked in noack mode */
691 break;
692 }
693 if (checksum_ok)
694 {
695 if ((retval = gdb_write(connection, "+", 1)) != ERROR_OK)
696 {
697 return retval;
698 }
699 break;
700 }
701 }
702 if (gdb_con->closed)
703 return ERROR_SERVER_REMOTE_CLOSED;
704
705 return ERROR_OK;
706 }
707
708 static int gdb_get_packet(struct connection *connection, char *buffer, int *len)
709 {
710 struct gdb_connection *gdb_con = connection->priv;
711 gdb_con->busy = 1;
712 int retval = gdb_get_packet_inner(connection, buffer, len);
713 gdb_con->busy = 0;
714 return retval;
715 }
716
717 static int gdb_output_con(struct connection *connection, const char* line)
718 {
719 char *hex_buffer;
720 int i, bin_size;
721
722 bin_size = strlen(line);
723
724 hex_buffer = malloc(bin_size*2 + 2);
725 if (hex_buffer == NULL)
726 return ERROR_GDB_BUFFER_TOO_SMALL;
727
728 hex_buffer[0] = 'O';
729 for (i = 0; i < bin_size; i++)
730 snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);
731 hex_buffer[bin_size*2 + 1] = 0;
732
733 int retval = gdb_put_packet(connection, hex_buffer, bin_size*2 + 1);
734
735 free(hex_buffer);
736 return retval;
737 }
738
739 static int gdb_output(struct command_context *context, const char* line)
740 {
741 /* this will be dumped to the log and also sent as an O packet if possible */
742 LOG_USER_N("%s", line);
743 return ERROR_OK;
744 }
745
746
747 static void gdb_frontend_halted(struct target *target, struct connection *connection)
748 {
749 struct gdb_connection *gdb_connection = connection->priv;
750
751 /* In the GDB protocol when we are stepping or continuing execution,
752 * we have a lingering reply. Upon receiving a halted event
753 * when we have that lingering packet, we reply to the original
754 * step or continue packet.
755 *
756 * Executing monitor commands can bring the target in and
757 * out of the running state so we'll see lots of TARGET_EVENT_XXX
758 * that are to be ignored.
759 */
760 if (gdb_connection->frontend_state == TARGET_RUNNING)
761 {
762 char sig_reply[4];
763 int signal_var;
764
765 /* stop forwarding log packets! */
766 log_remove_callback(gdb_log_callback, connection);
767
768 if (gdb_connection->ctrl_c)
769 {
770 signal_var = 0x2;
771 gdb_connection->ctrl_c = 0;
772 }
773 else
774 {
775 signal_var = gdb_last_signal(target);
776 }
777
778 snprintf(sig_reply, 4, "T%2.2x", signal_var);
779 gdb_put_packet(connection, sig_reply, 3);
780 gdb_connection->frontend_state = TARGET_HALTED;
781 }
782 }
783
784 static int gdb_target_callback_event_handler(struct target *target,
785 enum target_event event, void *priv)
786 {
787 int retval;
788 struct connection *connection = priv;
789
790 target_handle_event(target, event);
791 switch (event)
792 {
793 case TARGET_EVENT_GDB_HALT:
794 gdb_frontend_halted(target, connection);
795 break;
796 case TARGET_EVENT_HALTED:
797 target_call_event_callbacks(target, TARGET_EVENT_GDB_END);
798 break;
799 case TARGET_EVENT_GDB_FLASH_ERASE_START:
800 target_handle_event(target, TARGET_EVENT_OLD_gdb_program_config);
801 if ((retval = jtag_execute_queue()) != ERROR_OK)
802 {
803 return retval;
804 }
805 break;
806 default:
807 break;
808 }
809
810 return ERROR_OK;
811 }
812
813 static int gdb_new_connection(struct connection *connection)
814 {
815 struct gdb_connection *gdb_connection = malloc(sizeof(struct gdb_connection));
816 struct gdb_service *gdb_service = connection->service->priv;
817 int retval;
818 int initial_ack;
819
820 connection->priv = gdb_connection;
821
822 /* initialize gdb connection information */
823 gdb_connection->buf_p = gdb_connection->buffer;
824 gdb_connection->buf_cnt = 0;
825 gdb_connection->ctrl_c = 0;
826 gdb_connection->frontend_state = TARGET_HALTED;
827 gdb_connection->vflash_image = NULL;
828 gdb_connection->closed = 0;
829 gdb_connection->busy = 0;
830 gdb_connection->noack_mode = 0;
831 gdb_connection->sync = true;
832 gdb_connection->mem_write_error = false;
833
834 /* send ACK to GDB for debug request */
835 gdb_write(connection, "+", 1);
836
837 /* output goes through gdb connection */
838 command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
839
840 /* we must remove all breakpoints registered to the target as a previous
841 * GDB session could leave dangling breakpoints if e.g. communication
842 * timed out.
843 */
844 breakpoint_clear_target(gdb_service->target);
845 watchpoint_clear_target(gdb_service->target);
846
847 /* register callback to be informed about target events */
848 target_register_event_callback(gdb_target_callback_event_handler, connection);
849
850 /* remove the initial ACK from the incoming buffer */
851 if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
852 return retval;
853
854 /* FIX!!!??? would we actually ever receive a + here???
855 * Not observed.
856 */
857 if (initial_ack != '+')
858 gdb_putback_char(connection, initial_ack);
859 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_ATTACH);
860
861 if (gdb_use_memory_map)
862 {
863 /* Connect must fail if the memory map can't be set up correctly.
864 *
865 * This will cause an auto_probe to be invoked, which is either
866 * a no-op or it will fail when the target isn't ready(e.g. not halted).
867 */
868 int i;
869 for (i = 0; i < flash_get_bank_count(); i++)
870 {
871 struct flash_bank *p;
872 retval = get_flash_bank_by_num(i, &p);
873 if (retval != ERROR_OK)
874 {
875 LOG_ERROR("Connect failed. Consider setting up a gdb-attach event for the target to prepare target for GDB connect.");
876 return retval;
877 }
878 }
879 }
880
881 gdb_actual_connections++;
882 LOG_DEBUG("New GDB Connection: %d, Target %s, state: %s",
883 gdb_actual_connections,
884 target_name(gdb_service->target),
885 target_state_name(gdb_service->target));
886
887 return ERROR_OK;
888 }
889
890 static int gdb_connection_closed(struct connection *connection)
891 {
892 struct gdb_service *gdb_service = connection->service->priv;
893 struct gdb_connection *gdb_connection = connection->priv;
894
895 /* we're done forwarding messages. Tear down callback before
896 * cleaning up connection.
897 */
898 log_remove_callback(gdb_log_callback, connection);
899
900 gdb_actual_connections--;
901 LOG_DEBUG("GDB Close, Target: %s, state: %s, gdb_actual_connections=%d",
902 target_name(gdb_service->target),
903 target_state_name(gdb_service->target),
904 gdb_actual_connections);
905
906 /* see if an image built with vFlash commands is left */
907 if (gdb_connection->vflash_image)
908 {
909 image_close(gdb_connection->vflash_image);
910 free(gdb_connection->vflash_image);
911 gdb_connection->vflash_image = NULL;
912 }
913
914 /* if this connection registered a debug-message receiver delete it */
915 delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
916
917 if (connection->priv)
918 {
919 free(connection->priv);
920 connection->priv = NULL;
921 }
922 else
923 {
924 LOG_ERROR("BUG: connection->priv == NULL");
925 }
926
927
928 target_unregister_event_callback(gdb_target_callback_event_handler, connection);
929
930 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_END);
931
932 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_DETACH);
933
934 return ERROR_OK;
935 }
936
937 static void gdb_send_error(struct connection *connection, uint8_t the_error)
938 {
939 char err[4];
940 snprintf(err, 4, "E%2.2X", the_error);
941 gdb_put_packet(connection, err, 3);
942 }
943
944 static int gdb_last_signal_packet(struct connection *connection,
945 struct target *target, char* packet, int packet_size)
946 {
947 char sig_reply[4];
948 int signal_var;
949
950 signal_var = gdb_last_signal(target);
951
952 snprintf(sig_reply, 4, "S%2.2x", signal_var);
953 gdb_put_packet(connection, sig_reply, 3);
954
955 return ERROR_OK;
956 }
957
958 static int gdb_reg_pos(struct target *target, int pos, int len)
959 {
960 if (target->endianness == TARGET_LITTLE_ENDIAN)
961 return pos;
962 else
963 return len - 1 - pos;
964 }
965
966 /* Convert register to string of bytes. NB! The # of bits in the
967 * register might be non-divisible by 8(a byte), in which
968 * case an entire byte is shown.
969 *
970 * NB! the format on the wire is the target endianness
971 *
972 * The format of reg->value is little endian
973 *
974 */
975 static void gdb_str_to_target(struct target *target,
976 char *tstr, struct reg *reg)
977 {
978 int i;
979
980 uint8_t *buf;
981 int buf_len;
982 buf = reg->value;
983 buf_len = DIV_ROUND_UP(reg->size, 8);
984
985 for (i = 0; i < buf_len; i++)
986 {
987 int j = gdb_reg_pos(target, i, buf_len);
988 tstr[i*2] = DIGITS[(buf[j]>>4) & 0xf];
989 tstr[i*2 + 1] = DIGITS[buf[j]&0xf];
990 }
991 }
992
993 static int hextoint(int c)
994 {
995 if (c>='0'&&c<='9')
996 {
997 return c-'0';
998 }
999 c = toupper(c);
1000 if (c>='A'&&c<='F')
1001 {
1002 return c-'A'+10;
1003 }
1004 LOG_ERROR("BUG: invalid register value %08x", c);
1005 return 0;
1006 }
1007
1008 /* copy over in register buffer */
1009 static void gdb_target_to_reg(struct target *target,
1010 char *tstr, int str_len, uint8_t *bin)
1011 {
1012 if (str_len % 2)
1013 {
1014 LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
1015 exit(-1);
1016 }
1017
1018 int i;
1019 for (i = 0; i < str_len; i += 2)
1020 {
1021 uint8_t t = hextoint(tstr[i]) << 4;
1022 t |= hextoint(tstr[i + 1]);
1023
1024 int j = gdb_reg_pos(target, i/2, str_len/2);
1025 bin[j] = t;
1026 }
1027 }
1028
1029 static int gdb_get_registers_packet(struct connection *connection,
1030 struct target *target, char* packet, int packet_size)
1031 {
1032 struct reg **reg_list;
1033 int reg_list_size;
1034 int retval;
1035 int reg_packet_size = 0;
1036 char *reg_packet;
1037 char *reg_packet_p;
1038 int i;
1039
1040 #ifdef _DEBUG_GDB_IO_
1041 LOG_DEBUG("-");
1042 #endif
1043
1044 if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1045 {
1046 return gdb_error(connection, retval);
1047 }
1048
1049 for (i = 0; i < reg_list_size; i++)
1050 {
1051 reg_packet_size += reg_list[i]->size;
1052 }
1053
1054 reg_packet = malloc(DIV_ROUND_UP(reg_packet_size, 8) * 2);
1055 reg_packet_p = reg_packet;
1056
1057 for (i = 0; i < reg_list_size; i++)
1058 {
1059 gdb_str_to_target(target, reg_packet_p, reg_list[i]);
1060 reg_packet_p += DIV_ROUND_UP(reg_list[i]->size, 8) * 2;
1061 }
1062
1063 #ifdef _DEBUG_GDB_IO_
1064 {
1065 char *reg_packet_p;
1066 reg_packet_p = strndup(reg_packet, DIV_ROUND_UP(reg_packet_size, 8) * 2);
1067 LOG_DEBUG("reg_packet: %s", reg_packet_p);
1068 free(reg_packet_p);
1069 }
1070 #endif
1071
1072 gdb_put_packet(connection, reg_packet, DIV_ROUND_UP(reg_packet_size, 8) * 2);
1073 free(reg_packet);
1074
1075 free(reg_list);
1076
1077 return ERROR_OK;
1078 }
1079
1080 static int gdb_set_registers_packet(struct connection *connection,
1081 struct target *target, char *packet, int packet_size)
1082 {
1083 int i;
1084 struct reg **reg_list;
1085 int reg_list_size;
1086 int retval;
1087 char *packet_p;
1088
1089 #ifdef _DEBUG_GDB_IO_
1090 LOG_DEBUG("-");
1091 #endif
1092
1093 /* skip command character */
1094 packet++;
1095 packet_size--;
1096
1097 if (packet_size % 2)
1098 {
1099 LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection");
1100 return ERROR_SERVER_REMOTE_CLOSED;
1101 }
1102
1103 if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1104 {
1105 return gdb_error(connection, retval);
1106 }
1107
1108 packet_p = packet;
1109 for (i = 0; i < reg_list_size; i++)
1110 {
1111 uint8_t *bin_buf;
1112 int chars = (DIV_ROUND_UP(reg_list[i]->size, 8) * 2);
1113
1114 if (packet_p + chars > packet + packet_size)
1115 {
1116 LOG_ERROR("BUG: register packet is too small for registers");
1117 }
1118
1119 bin_buf = malloc(DIV_ROUND_UP(reg_list[i]->size, 8));
1120 gdb_target_to_reg(target, packet_p, chars, bin_buf);
1121
1122 reg_list[i]->type->set(reg_list[i], bin_buf);
1123
1124 /* advance packet pointer */
1125 packet_p += chars;
1126
1127
1128 free(bin_buf);
1129 }
1130
1131 /* free struct reg *reg_list[] array allocated by get_gdb_reg_list */
1132 free(reg_list);
1133
1134 gdb_put_packet(connection, "OK", 2);
1135
1136 return ERROR_OK;
1137 }
1138
1139 static int gdb_get_register_packet(struct connection *connection,
1140 struct target *target, char *packet, int packet_size)
1141 {
1142 char *reg_packet;
1143 int reg_num = strtoul(packet + 1, NULL, 16);
1144 struct reg **reg_list;
1145 int reg_list_size;
1146 int retval;
1147
1148 #ifdef _DEBUG_GDB_IO_
1149 LOG_DEBUG("-");
1150 #endif
1151
1152 if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1153 {
1154 return gdb_error(connection, retval);
1155 }
1156
1157 if (reg_list_size <= reg_num)
1158 {
1159 LOG_ERROR("gdb requested a non-existing register");
1160 exit(-1);
1161 }
1162
1163 reg_packet = malloc(DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2);
1164
1165 gdb_str_to_target(target, reg_packet, reg_list[reg_num]);
1166
1167 gdb_put_packet(connection, reg_packet, DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2);
1168
1169 free(reg_list);
1170 free(reg_packet);
1171
1172 return ERROR_OK;
1173 }
1174
1175 static int gdb_set_register_packet(struct connection *connection,
1176 struct target *target, char *packet, int packet_size)
1177 {
1178 char *separator;
1179 uint8_t *bin_buf;
1180 int reg_num = strtoul(packet + 1, &separator, 16);
1181 struct reg **reg_list;
1182 int reg_list_size;
1183 int retval;
1184
1185 LOG_DEBUG("-");
1186
1187 if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1188 {
1189 return gdb_error(connection, retval);
1190 }
1191
1192 if (reg_list_size < reg_num)
1193 {
1194 LOG_ERROR("gdb requested a non-existing register");
1195 return ERROR_SERVER_REMOTE_CLOSED;
1196 }
1197
1198 if (*separator != '=')
1199 {
1200 LOG_ERROR("GDB 'set register packet', but no '=' following the register number");
1201 return ERROR_SERVER_REMOTE_CLOSED;
1202 }
1203
1204 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
1205 bin_buf = malloc(DIV_ROUND_UP(reg_list[reg_num]->size, 8));
1206 int chars = (DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2);
1207
1208 /* fix!!! add some sanity checks on packet size here */
1209
1210 gdb_target_to_reg(target, separator + 1, chars, bin_buf);
1211
1212 reg_list[reg_num]->type->set(reg_list[reg_num], bin_buf);
1213
1214 gdb_put_packet(connection, "OK", 2);
1215
1216 free(bin_buf);
1217 free(reg_list);
1218
1219 return ERROR_OK;
1220 }
1221
1222 /* No attempt is made to translate the "retval" to
1223 * GDB speak. This has to be done at the calling
1224 * site as no mapping really exists.
1225 */
1226 static int gdb_error(struct connection *connection, int retval)
1227 {
1228 LOG_DEBUG("Reporting %i to GDB as generic error", retval);
1229 gdb_send_error(connection, EFAULT);
1230 return ERROR_OK;
1231 }
1232
1233 /* We don't have to worry about the default 2 second timeout for GDB packets,
1234 * because GDB breaks up large memory reads into smaller reads.
1235 *
1236 * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
1237 */
1238 static int gdb_read_memory_packet(struct connection *connection,
1239 struct target *target, char *packet, int packet_size)
1240 {
1241 char *separator;
1242 uint32_t addr = 0;
1243 uint32_t len = 0;
1244
1245 uint8_t *buffer;
1246 char *hex_buffer;
1247
1248 int retval = ERROR_OK;
1249
1250 /* skip command character */
1251 packet++;
1252
1253 addr = strtoul(packet, &separator, 16);
1254
1255 if (*separator != ',')
1256 {
1257 LOG_ERROR("incomplete read memory packet received, dropping connection");
1258 return ERROR_SERVER_REMOTE_CLOSED;
1259 }
1260
1261 len = strtoul(separator + 1, NULL, 16);
1262
1263 buffer = malloc(len);
1264
1265 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1266
1267 retval = target_read_buffer(target, addr, len, buffer);
1268
1269 if ((retval != ERROR_OK)&&!gdb_report_data_abort)
1270 {
1271 /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
1272 * At some point this might be fixed in GDB, in which case this code can be removed.
1273 *
1274 * OpenOCD developers are acutely aware of this problem, but there is nothing
1275 * gained by involving the user in this problem that hopefully will get resolved
1276 * eventually
1277 *
1278 * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd = view%20audit-trail&database = gdb&pr = 2395
1279 *
1280 * For now, the default is to fix up things to make current GDB versions work.
1281 * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
1282 */
1283 memset(buffer, 0, len);
1284 retval = ERROR_OK;
1285 }
1286
1287 if (retval == ERROR_OK)
1288 {
1289 hex_buffer = malloc(len * 2 + 1);
1290
1291 uint32_t i;
1292 for (i = 0; i < len; i++)
1293 {
1294 uint8_t t = buffer[i];
1295 hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf];
1296 hex_buffer[2 * i + 1] = DIGITS[t & 0xf];
1297 }
1298
1299 gdb_put_packet(connection, hex_buffer, len * 2);
1300
1301 free(hex_buffer);
1302 }
1303 else
1304 {
1305 retval = gdb_error(connection, retval);
1306 }
1307
1308 free(buffer);
1309
1310 return retval;
1311 }
1312
1313 static int gdb_write_memory_packet(struct connection *connection,
1314 struct target *target, char *packet, int packet_size)
1315 {
1316 char *separator;
1317 uint32_t addr = 0;
1318 uint32_t len = 0;
1319
1320 uint8_t *buffer;
1321
1322 uint32_t i;
1323 int retval;
1324
1325 /* skip command character */
1326 packet++;
1327
1328 addr = strtoul(packet, &separator, 16);
1329
1330 if (*separator != ',')
1331 {
1332 LOG_ERROR("incomplete write memory packet received, dropping connection");
1333 return ERROR_SERVER_REMOTE_CLOSED;
1334 }
1335
1336 len = strtoul(separator + 1, &separator, 16);
1337
1338 if (*(separator++) != ':')
1339 {
1340 LOG_ERROR("incomplete write memory packet received, dropping connection");
1341 return ERROR_SERVER_REMOTE_CLOSED;
1342 }
1343
1344 buffer = malloc(len);
1345
1346 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1347
1348 for (i = 0; i < len; i++)
1349 {
1350 uint32_t tmp;
1351 sscanf(separator + 2*i, "%2" SCNx32 , &tmp);
1352 buffer[i] = tmp;
1353 }
1354
1355 retval = target_write_buffer(target, addr, len, buffer);
1356
1357 if (retval == ERROR_OK)
1358 {
1359 gdb_put_packet(connection, "OK", 2);
1360 }
1361 else
1362 {
1363 retval = gdb_error(connection, retval);
1364 }
1365
1366 free(buffer);
1367
1368 return retval;
1369 }
1370
1371 static int gdb_write_memory_binary_packet(struct connection *connection,
1372 struct target *target, char *packet, int packet_size)
1373 {
1374 char *separator;
1375 uint32_t addr = 0;
1376 uint32_t len = 0;
1377
1378 int retval = ERROR_OK;
1379
1380 /* skip command character */
1381 packet++;
1382
1383 addr = strtoul(packet, &separator, 16);
1384
1385 if (*separator != ',')
1386 {
1387 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1388 return ERROR_SERVER_REMOTE_CLOSED;
1389 }
1390
1391 len = strtoul(separator + 1, &separator, 16);
1392
1393 if (*(separator++) != ':')
1394 {
1395 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1396 return ERROR_SERVER_REMOTE_CLOSED;
1397 }
1398
1399 struct gdb_connection *gdb_connection = connection->priv;
1400
1401 if (gdb_connection->mem_write_error)
1402 {
1403 retval = ERROR_FAIL;
1404 /* now that we have reported the memory write error, we can clear the condition */
1405 gdb_connection->mem_write_error = false;
1406 }
1407
1408 /* By replying the packet *immediately* GDB will send us a new packet
1409 * while we write the last one to the target.
1410 */
1411 if (retval == ERROR_OK)
1412 {
1413 gdb_put_packet(connection, "OK", 2);
1414 }
1415 else
1416 {
1417 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1418 return retval;
1419 }
1420
1421 if (len)
1422 {
1423 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1424
1425 retval = target_write_buffer(target, addr, len, (uint8_t*)separator);
1426 if (retval != ERROR_OK)
1427 {
1428 gdb_connection->mem_write_error = true;
1429 }
1430 }
1431
1432 return ERROR_OK;
1433 }
1434
1435 static int gdb_step_continue_packet(struct connection *connection,
1436 struct target *target, char *packet, int packet_size)
1437 {
1438 int current = 0;
1439 uint32_t address = 0x0;
1440 int retval = ERROR_OK;
1441
1442 LOG_DEBUG("-");
1443
1444 if (packet_size > 1)
1445 {
1446 packet[packet_size] = 0;
1447 address = strtoul(packet + 1, NULL, 16);
1448 }
1449 else
1450 {
1451 current = 1;
1452 }
1453
1454 if (packet[0] == 'c')
1455 {
1456 LOG_DEBUG("continue");
1457 target_handle_event(target, TARGET_EVENT_OLD_pre_resume);
1458 retval = target_resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
1459 }
1460 else if (packet[0] == 's')
1461 {
1462 LOG_DEBUG("step");
1463 /* step at current or address, don't handle breakpoints */
1464 retval = target_step(target, current, address, 0);
1465 }
1466 return retval;
1467 }
1468
1469 static int gdb_breakpoint_watchpoint_packet(struct connection *connection,
1470 struct target *target, char *packet, int packet_size)
1471 {
1472 int type;
1473 enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
1474 enum watchpoint_rw wp_type = WPT_READ /* dummy init to avoid warning */;
1475 uint32_t address;
1476 uint32_t size;
1477 char *separator;
1478 int retval;
1479
1480 LOG_DEBUG("-");
1481
1482 type = strtoul(packet + 1, &separator, 16);
1483
1484 if (type == 0) /* memory breakpoint */
1485 bp_type = BKPT_SOFT;
1486 else if (type == 1) /* hardware breakpoint */
1487 bp_type = BKPT_HARD;
1488 else if (type == 2) /* write watchpoint */
1489 wp_type = WPT_WRITE;
1490 else if (type == 3) /* read watchpoint */
1491 wp_type = WPT_READ;
1492 else if (type == 4) /* access watchpoint */
1493 wp_type = WPT_ACCESS;
1494 else
1495 {
1496 LOG_ERROR("invalid gdb watch/breakpoint type(%d), dropping connection", type);
1497 return ERROR_SERVER_REMOTE_CLOSED;
1498 }
1499
1500
1501 if (gdb_breakpoint_override && ((bp_type == BKPT_SOFT)||(bp_type == BKPT_HARD)))
1502 {
1503 bp_type = gdb_breakpoint_override_type;
1504 }
1505
1506 if (*separator != ',')
1507 {
1508 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1509 return ERROR_SERVER_REMOTE_CLOSED;
1510 }
1511
1512 address = strtoul(separator + 1, &separator, 16);
1513
1514 if (*separator != ',')
1515 {
1516 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1517 return ERROR_SERVER_REMOTE_CLOSED;
1518 }
1519
1520 size = strtoul(separator + 1, &separator, 16);
1521
1522 switch (type)
1523 {
1524 case 0:
1525 case 1:
1526 if (packet[0] == 'Z')
1527 {
1528 if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
1529 {
1530 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1531 return retval;
1532 }
1533 else
1534 {
1535 gdb_put_packet(connection, "OK", 2);
1536 }
1537 }
1538 else
1539 {
1540 breakpoint_remove(target, address);
1541 gdb_put_packet(connection, "OK", 2);
1542 }
1543 break;
1544 case 2:
1545 case 3:
1546 case 4:
1547 {
1548 if (packet[0] == 'Z')
1549 {
1550 if ((retval = watchpoint_add(target, address, size, wp_type, 0, 0xffffffffu)) != ERROR_OK)
1551 {
1552 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1553 return retval;
1554 }
1555 else
1556 {
1557 gdb_put_packet(connection, "OK", 2);
1558 }
1559 }
1560 else
1561 {
1562 watchpoint_remove(target, address);
1563 gdb_put_packet(connection, "OK", 2);
1564 }
1565 break;
1566 }
1567 default:
1568 break;
1569 }
1570
1571 return ERROR_OK;
1572 }
1573
1574 /* print out a string and allocate more space as needed,
1575 * mainly used for XML at this point
1576 */
1577 static void xml_printf(int *retval, char **xml, int *pos, int *size,
1578 const char *fmt, ...)
1579 {
1580 if (*retval != ERROR_OK)
1581 {
1582 return;
1583 }
1584 int first = 1;
1585
1586 for (;;)
1587 {
1588 if ((*xml == NULL) || (!first))
1589 {
1590 /* start by 0 to exercise all the code paths.
1591 * Need minimum 2 bytes to fit 1 char and 0 terminator. */
1592
1593 *size = *size * 2 + 2;
1594 char *t = *xml;
1595 *xml = realloc(*xml, *size);
1596 if (*xml == NULL)
1597 {
1598 if (t)
1599 free(t);
1600 *retval = ERROR_SERVER_REMOTE_CLOSED;
1601 return;
1602 }
1603 }
1604
1605 va_list ap;
1606 int ret;
1607 va_start(ap, fmt);
1608 ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
1609 va_end(ap);
1610 if ((ret > 0) && ((ret + 1) < *size - *pos))
1611 {
1612 *pos += ret;
1613 return;
1614 }
1615 /* there was just enough or not enough space, allocate more. */
1616 first = 0;
1617 }
1618 }
1619
1620 static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len)
1621 {
1622 char *separator;
1623
1624 /* Extract and NUL-terminate the annex. */
1625 *annex = buf;
1626 while (*buf && *buf != ':')
1627 buf++;
1628 if (*buf == '\0')
1629 return -1;
1630 *buf++ = 0;
1631
1632 /* After the read marker and annex, qXfer looks like a
1633 * traditional 'm' packet. */
1634
1635 *ofs = strtoul(buf, &separator, 16);
1636
1637 if (*separator != ',')
1638 return -1;
1639
1640 *len = strtoul(separator + 1, NULL, 16);
1641
1642 return 0;
1643 }
1644
1645 static int compare_bank (const void * a, const void * b)
1646 {
1647 struct flash_bank *b1, *b2;
1648 b1=*((struct flash_bank **)a);
1649 b2=*((struct flash_bank **)b);
1650
1651 if (b1->base == b2->base)
1652 {
1653 return 0;
1654 } else if (b1->base > b2->base)
1655 {
1656 return 1;
1657 } else
1658 {
1659 return -1;
1660 }
1661 }
1662
1663 static int gdb_memory_map(struct connection *connection,
1664 struct target *target, char *packet, int packet_size)
1665 {
1666 /* We get away with only specifying flash here. Regions that are not
1667 * specified are treated as if we provided no memory map(if not we
1668 * could detect the holes and mark them as RAM).
1669 * Normally we only execute this code once, but no big deal if we
1670 * have to regenerate it a couple of times.
1671 */
1672
1673 struct flash_bank *p;
1674 char *xml = NULL;
1675 int size = 0;
1676 int pos = 0;
1677 int retval = ERROR_OK;
1678 struct flash_bank **banks;
1679 int offset;
1680 int length;
1681 char *separator;
1682 uint32_t ram_start = 0;
1683 int i;
1684 int target_flash_banks = 0;
1685
1686 /* skip command character */
1687 packet += 23;
1688
1689 offset = strtoul(packet, &separator, 16);
1690 length = strtoul(separator + 1, &separator, 16);
1691
1692 xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
1693
1694 /* Sort banks in ascending order. We need to report non-flash
1695 * memory as ram (or rather read/write) by default for GDB, since
1696 * it has no concept of non-cacheable read/write memory (i/o etc).
1697 *
1698 * FIXME Most non-flash addresses are *NOT* RAM! Don't lie.
1699 * Current versions of GDB assume unlisted addresses are RAM...
1700 */
1701 banks = malloc(sizeof(struct flash_bank *)*flash_get_bank_count());
1702
1703 for (i = 0; i < flash_get_bank_count(); i++) {
1704 retval = get_flash_bank_by_num(i, &p);
1705 if (retval != ERROR_OK)
1706 {
1707 free(banks);
1708 gdb_error(connection, retval);
1709 return retval;
1710 }
1711 if(p->target == target)
1712 banks[target_flash_banks++] = p;
1713 }
1714
1715 qsort(banks, target_flash_banks, sizeof(struct flash_bank *),
1716 compare_bank);
1717
1718 for (i = 0; i < flash_get_bank_count(); i++) {
1719 int j;
1720 unsigned sector_size = 0;
1721 uint32_t start, end;
1722
1723 p = banks[i];
1724 start = p->base;
1725 end = p->base + p->size;
1726
1727 if (ram_start < p->base)
1728 xml_printf(&retval, &xml, &pos, &size,
1729 "<memory type=\"ram\" start=\"0x%x\" "
1730 "length=\"0x%x\"/>\n",
1731 ram_start, p->base - ram_start);
1732
1733 /* Report adjacent groups of same-size sectors. So for
1734 * example top boot CFI flash will list an initial region
1735 * with several large sectors (maybe 128KB) and several
1736 * smaller ones at the end (maybe 32KB). STR7 will have
1737 * regions with 8KB, 32KB, and 64KB sectors; etc.
1738 */
1739 for (j = 0; j < p->num_sectors; j++) {
1740 unsigned group_len;
1741
1742 /* Maybe start a new group of sectors. */
1743 if (sector_size == 0) {
1744 start = p->base + p->sectors[j].offset;
1745 xml_printf(&retval, &xml, &pos, &size,
1746 "<memory type=\"flash\" "
1747 "start=\"0x%x\" ",
1748 start);
1749 sector_size = p->sectors[j].size;
1750 }
1751
1752 /* Does this finish a group of sectors?
1753 * If not, continue an already-started group.
1754 */
1755 if (j == p->num_sectors -1)
1756 group_len = (p->base + p->size) - start;
1757 else if (p->sectors[j + 1].size != sector_size)
1758 group_len = p->base + p->sectors[j + 1].offset
1759 - start;
1760 else
1761 continue;
1762
1763 xml_printf(&retval, &xml, &pos, &size,
1764 "length=\"0x%x\">\n"
1765 "<property name=\"blocksize\">"
1766 "0x%x</property>\n"
1767 "</memory>\n",
1768 group_len,
1769 sector_size);
1770 sector_size = 0;
1771 }
1772
1773 ram_start = p->base + p->size;
1774 }
1775
1776 if (ram_start != 0)
1777 xml_printf(&retval, &xml, &pos, &size,
1778 "<memory type=\"ram\" start=\"0x%x\" "
1779 "length=\"0x%x\"/>\n",
1780 ram_start, 0-ram_start);
1781 /* ELSE a flash chip could be at the very end of the 32 bit address
1782 * space, in which case ram_start will be precisely 0
1783 */
1784
1785 free(banks);
1786 banks = NULL;
1787
1788 xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
1789
1790 if (retval != ERROR_OK) {
1791 gdb_error(connection, retval);
1792 return retval;
1793 }
1794
1795 if (offset + length > pos)
1796 length = pos - offset;
1797
1798 char *t = malloc(length + 1);
1799 t[0] = 'l';
1800 memcpy(t + 1, xml + offset, length);
1801 gdb_put_packet(connection, t, length + 1);
1802
1803 free(t);
1804 free(xml);
1805 return ERROR_OK;
1806 }
1807
1808 static int gdb_query_packet(struct connection *connection,
1809 struct target *target, char *packet, int packet_size)
1810 {
1811 struct command_context *cmd_ctx = connection->cmd_ctx;
1812 struct gdb_connection *gdb_connection = connection->priv;
1813
1814 if (strstr(packet, "qRcmd,"))
1815 {
1816 if (packet_size > 6)
1817 {
1818 char *cmd;
1819 int i;
1820 cmd = malloc((packet_size - 6)/2 + 1);
1821 for (i = 0; i < (packet_size - 6)/2; i++)
1822 {
1823 uint32_t tmp;
1824 sscanf(packet + 6 + 2*i, "%2" SCNx32 , &tmp);
1825 cmd[i] = tmp;
1826 }
1827 cmd[(packet_size - 6)/2] = 0x0;
1828
1829 /* We want to print all debug output to GDB connection */
1830 log_add_callback(gdb_log_callback, connection);
1831 target_call_timer_callbacks_now();
1832 /* some commands need to know the GDB connection, make note of current
1833 * GDB connection. */
1834 current_gdb_connection = gdb_connection;
1835 command_run_line(cmd_ctx, cmd);
1836 current_gdb_connection = NULL;
1837 target_call_timer_callbacks_now();
1838 log_remove_callback(gdb_log_callback, connection);
1839 free(cmd);
1840 }
1841 gdb_put_packet(connection, "OK", 2);
1842 return ERROR_OK;
1843 }
1844 else if (strstr(packet, "qCRC:"))
1845 {
1846 if (packet_size > 5)
1847 {
1848 int retval;
1849 char gdb_reply[10];
1850 char *separator;
1851 uint32_t checksum;
1852 uint32_t addr = 0;
1853 uint32_t len = 0;
1854
1855 /* skip command character */
1856 packet += 5;
1857
1858 addr = strtoul(packet, &separator, 16);
1859
1860 if (*separator != ',')
1861 {
1862 LOG_ERROR("incomplete read memory packet received, dropping connection");
1863 return ERROR_SERVER_REMOTE_CLOSED;
1864 }
1865
1866 len = strtoul(separator + 1, NULL, 16);
1867
1868 retval = target_checksum_memory(target, addr, len, &checksum);
1869
1870 if (retval == ERROR_OK)
1871 {
1872 snprintf(gdb_reply, 10, "C%8.8" PRIx32 "", checksum);
1873 gdb_put_packet(connection, gdb_reply, 9);
1874 }
1875 else
1876 {
1877 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1878 return retval;
1879 }
1880
1881 return ERROR_OK;
1882 }
1883 }
1884 else if (strstr(packet, "qSupported"))
1885 {
1886 /* we currently support packet size and qXfer:memory-map:read (if enabled)
1887 * disable qXfer:features:read for the moment */
1888 int retval = ERROR_OK;
1889 char *buffer = NULL;
1890 int pos = 0;
1891 int size = 0;
1892
1893 xml_printf(&retval, &buffer, &pos, &size,
1894 "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-;QStartNoAckMode+",
1895 (GDB_BUFFER_SIZE - 1), ((gdb_use_memory_map == 1) && (flash_get_bank_count() > 0)) ? '+' : '-');
1896
1897 if (retval != ERROR_OK)
1898 {
1899 gdb_send_error(connection, 01);
1900 return ERROR_OK;
1901 }
1902
1903 gdb_put_packet(connection, buffer, strlen(buffer));
1904 free(buffer);
1905
1906 return ERROR_OK;
1907 }
1908 else if (strstr(packet, "qXfer:memory-map:read::")
1909 && (flash_get_bank_count() > 0))
1910 return gdb_memory_map(connection, target, packet, packet_size);
1911 else if (strstr(packet, "qXfer:features:read:"))
1912 {
1913 char *xml = NULL;
1914 int size = 0;
1915 int pos = 0;
1916 int retval = ERROR_OK;
1917
1918 int offset;
1919 unsigned int length;
1920 char *annex;
1921
1922 /* skip command character */
1923 packet += 20;
1924
1925 if (decode_xfer_read(packet, &annex, &offset, &length) < 0)
1926 {
1927 gdb_send_error(connection, 01);
1928 return ERROR_OK;
1929 }
1930
1931 if (strcmp(annex, "target.xml") != 0)
1932 {
1933 gdb_send_error(connection, 01);
1934 return ERROR_OK;
1935 }
1936
1937 xml_printf(&retval, &xml, &pos, &size, \
1938 "l < target version=\"1.0\">\n < architecture > arm</architecture>\n</target>\n");
1939
1940 if (retval != ERROR_OK)
1941 {
1942 gdb_error(connection, retval);
1943 return retval;
1944 }
1945
1946 gdb_put_packet(connection, xml, strlen(xml));
1947
1948 free(xml);
1949 return ERROR_OK;
1950 }
1951 else if (strstr(packet, "QStartNoAckMode"))
1952 {
1953 gdb_connection->noack_mode = 1;
1954 gdb_put_packet(connection, "OK", 2);
1955 return ERROR_OK;
1956 }
1957
1958 gdb_put_packet(connection, "", 0);
1959 return ERROR_OK;
1960 }
1961
1962 static int gdb_v_packet(struct connection *connection,
1963 struct target *target, char *packet, int packet_size)
1964 {
1965 struct gdb_connection *gdb_connection = connection->priv;
1966 struct gdb_service *gdb_service = connection->service->priv;
1967 int result;
1968
1969 /* if flash programming disabled - send a empty reply */
1970
1971 if (gdb_flash_program == 0)
1972 {
1973 gdb_put_packet(connection, "", 0);
1974 return ERROR_OK;
1975 }
1976
1977 if (strstr(packet, "vFlashErase:"))
1978 {
1979 unsigned long addr;
1980 unsigned long length;
1981
1982 char *parse = packet + 12;
1983 if (*parse == '\0')
1984 {
1985 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1986 return ERROR_SERVER_REMOTE_CLOSED;
1987 }
1988
1989 addr = strtoul(parse, &parse, 16);
1990
1991 if (*(parse++) != ',' || *parse == '\0')
1992 {
1993 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1994 return ERROR_SERVER_REMOTE_CLOSED;
1995 }
1996
1997 length = strtoul(parse, &parse, 16);
1998
1999 if (*parse != '\0')
2000 {
2001 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2002 return ERROR_SERVER_REMOTE_CLOSED;
2003 }
2004
2005 /* assume all sectors need erasing - stops any problems
2006 * when flash_write is called multiple times */
2007 flash_set_dirty();
2008
2009 /* perform any target specific operations before the erase */
2010 target_call_event_callbacks(gdb_service->target,
2011 TARGET_EVENT_GDB_FLASH_ERASE_START);
2012
2013 /* vFlashErase:addr,length messages require region start and
2014 * end to be "block" aligned ... if padding is ever needed,
2015 * GDB will have become dangerously confused.
2016 */
2017 result = flash_erase_address_range(gdb_service->target,
2018 false, addr, length);
2019
2020 /* perform any target specific operations after the erase */
2021 target_call_event_callbacks(gdb_service->target,
2022 TARGET_EVENT_GDB_FLASH_ERASE_END);
2023
2024 /* perform erase */
2025 if (result != ERROR_OK)
2026 {
2027 /* GDB doesn't evaluate the actual error number returned,
2028 * treat a failed erase as an I/O error
2029 */
2030 gdb_send_error(connection, EIO);
2031 LOG_ERROR("flash_erase returned %i", result);
2032 }
2033 else
2034 gdb_put_packet(connection, "OK", 2);
2035
2036 return ERROR_OK;
2037 }
2038
2039 if (strstr(packet, "vFlashWrite:"))
2040 {
2041 int retval;
2042 unsigned long addr;
2043 unsigned long length;
2044 char *parse = packet + 12;
2045
2046 if (*parse == '\0')
2047 {
2048 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2049 return ERROR_SERVER_REMOTE_CLOSED;
2050 }
2051 addr = strtoul(parse, &parse, 16);
2052 if (*(parse++) != ':')
2053 {
2054 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2055 return ERROR_SERVER_REMOTE_CLOSED;
2056 }
2057 length = packet_size - (parse - packet);
2058
2059 /* create a new image if there isn't already one */
2060 if (gdb_connection->vflash_image == NULL)
2061 {
2062 gdb_connection->vflash_image = malloc(sizeof(struct image));
2063 image_open(gdb_connection->vflash_image, "", "build");
2064 }
2065
2066 /* create new section with content from packet buffer */
2067 if ((retval = image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (uint8_t*)parse)) != ERROR_OK)
2068 {
2069 return retval;
2070 }
2071
2072 gdb_put_packet(connection, "OK", 2);
2073
2074 return ERROR_OK;
2075 }
2076
2077 if (!strcmp(packet, "vFlashDone"))
2078 {
2079 uint32_t written;
2080
2081 /* process the flashing buffer. No need to erase as GDB
2082 * always issues a vFlashErase first. */
2083 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_START);
2084 result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0);
2085 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_END);
2086 if (result != ERROR_OK)
2087 {
2088 if (result == ERROR_FLASH_DST_OUT_OF_BANK)
2089 gdb_put_packet(connection, "E.memtype", 9);
2090 else
2091 gdb_send_error(connection, EIO);
2092 }
2093 else
2094 {
2095 LOG_DEBUG("wrote %u bytes from vFlash image to flash", (unsigned)written);
2096 gdb_put_packet(connection, "OK", 2);
2097 }
2098
2099 image_close(gdb_connection->vflash_image);
2100 free(gdb_connection->vflash_image);
2101 gdb_connection->vflash_image = NULL;
2102
2103 return ERROR_OK;
2104 }
2105
2106 gdb_put_packet(connection, "", 0);
2107 return ERROR_OK;
2108 }
2109
2110 static int gdb_detach(struct connection *connection, struct target *target)
2111 {
2112 struct gdb_service *gdb_service = connection->service->priv;
2113
2114 target_call_event_callbacks(gdb_service->target,
2115 TARGET_EVENT_GDB_DETACH);
2116
2117 return gdb_put_packet(connection, "OK", 2);
2118 }
2119
2120 static void gdb_log_callback(void *priv, const char *file, unsigned line,
2121 const char *function, const char *string)
2122 {
2123 struct connection *connection = priv;
2124 struct gdb_connection *gdb_con = connection->priv;
2125
2126 if (gdb_con->busy)
2127 {
2128 /* do not reply this using the O packet */
2129 return;
2130 }
2131
2132 gdb_output_con(connection, string);
2133 }
2134
2135 static void gdb_sig_halted(struct connection *connection)
2136 {
2137 char sig_reply[4];
2138 snprintf(sig_reply, 4, "T%2.2x", 2);
2139 gdb_put_packet(connection, sig_reply, 3);
2140
2141 }
2142
2143 static int gdb_input_inner(struct connection *connection)
2144 {
2145 /* Do not allocate this on the stack */
2146 static char gdb_packet_buffer[GDB_BUFFER_SIZE];
2147
2148 struct gdb_service *gdb_service = connection->service->priv;
2149 struct target *target = gdb_service->target;
2150 char *packet = gdb_packet_buffer;
2151 int packet_size;
2152 int retval;
2153 struct gdb_connection *gdb_con = connection->priv;
2154 static int extended_protocol = 0;
2155
2156 /* drain input buffer. If one of the packets fail, then an error
2157 * packet is replied, if applicable.
2158 *
2159 * This loop will terminate and the error code is returned.
2160 *
2161 * The calling fn will check if this error is something that
2162 * can be recovered from, or if the connection must be closed.
2163 *
2164 * If the error is recoverable, this fn is called again to
2165 * drain the rest of the buffer.
2166 */
2167 do
2168 {
2169 packet_size = GDB_BUFFER_SIZE-1;
2170 retval = gdb_get_packet(connection, packet, &packet_size);
2171 if (retval != ERROR_OK)
2172 return retval;
2173
2174 /* terminate with zero */
2175 packet[packet_size] = 0;
2176
2177 if (LOG_LEVEL_IS(LOG_LVL_DEBUG)) {
2178 if (packet[0] == 'X') {
2179 // binary packets spew junk into the debug log stream
2180 char buf[ 50 ];
2181 int x;
2182 for (x = 0 ; (x < 49) && (packet[x] != ':') ; x++) {
2183 buf[x] = packet[x];
2184 }
2185 buf[x] = 0;
2186 LOG_DEBUG("received packet: '%s:<binary-data>'", buf);
2187 } else {
2188 LOG_DEBUG("received packet: '%s'", packet);
2189 }
2190 }
2191
2192 if (packet_size > 0)
2193 {
2194 retval = ERROR_OK;
2195 switch (packet[0])
2196 {
2197 case 'H':
2198 /* Hct... -- set thread
2199 * we don't have threads, send empty reply */
2200 gdb_put_packet(connection, NULL, 0);
2201 break;
2202 case 'q':
2203 case 'Q':
2204 retval = gdb_query_packet(connection,
2205 target, packet,
2206 packet_size);
2207 break;
2208 case 'g':
2209 retval = gdb_get_registers_packet(
2210 connection, target,
2211 packet, packet_size);
2212 break;
2213 case 'G':
2214 retval = gdb_set_registers_packet(
2215 connection, target,
2216 packet, packet_size);
2217 break;
2218 case 'p':
2219 retval = gdb_get_register_packet(
2220 connection, target,
2221 packet, packet_size);
2222 break;
2223 case 'P':
2224 retval = gdb_set_register_packet(
2225 connection, target,
2226 packet, packet_size);
2227 break;
2228 case 'm':
2229 retval = gdb_read_memory_packet(
2230 connection, target,
2231 packet, packet_size);
2232 break;
2233 case 'M':
2234 retval = gdb_write_memory_packet(
2235 connection, target,
2236 packet, packet_size);
2237 break;
2238 case 'z':
2239 case 'Z':
2240 retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
2241 break;
2242 case '?':
2243 gdb_last_signal_packet(
2244 connection, target,
2245 packet, packet_size);
2246 break;
2247 case 'c':
2248 case 's':
2249 {
2250 log_add_callback(gdb_log_callback, connection);
2251
2252 if (gdb_con->mem_write_error)
2253 {
2254 LOG_ERROR("Memory write failure!");
2255
2256 /* now that we have reported the memory write error, we can clear the condition */
2257 gdb_con->mem_write_error = false;
2258 }
2259
2260 bool nostep = false;
2261 bool already_running = false;
2262 if (target->state == TARGET_RUNNING)
2263 {
2264 LOG_WARNING("WARNING! The target is already running. "
2265 "All changes GDB did to registers will be discarded! "
2266 "Waiting for target to halt.");
2267 already_running = true;
2268 } else if (target->state != TARGET_HALTED)
2269 {
2270 LOG_WARNING("The target is not in the halted nor running stated, stepi/continue ignored.");
2271 nostep = true;
2272 } else if ((packet[0] == 's') && gdb_con->sync)
2273 {
2274 /* Hmm..... when you issue a continue in GDB, then a "stepi" is
2275 * sent by GDB first to OpenOCD, thus defeating the check to
2276 * make only the single stepping have the sync feature...
2277 */
2278 nostep = true;
2279 LOG_WARNING("stepi ignored. GDB will now fetch the register state from the target.");
2280 }
2281 gdb_con->sync = false;
2282
2283 if (!already_running && nostep)
2284 {
2285 /* Either the target isn't in the halted state, then we can't
2286 * step/continue. This might be early setup, etc.
2287 *
2288 * Or we want to allow GDB to pick up a fresh set of
2289 * register values without modifying the target state.
2290 *
2291 */
2292 gdb_sig_halted(connection);
2293
2294 /* stop forwarding log packets! */
2295 log_remove_callback(gdb_log_callback, connection);
2296 } else
2297 {
2298 /* We're running/stepping, in which case we can
2299 * forward log output until the target is halted
2300 */
2301 gdb_con->frontend_state = TARGET_RUNNING;
2302 target_call_event_callbacks(target, TARGET_EVENT_GDB_START);
2303
2304 if (!already_running)
2305 {
2306 /* Here we don't want packet processing to stop even if this fails,
2307 * so we use a local variable instead of retval. */
2308 retval = gdb_step_continue_packet(connection, target, packet, packet_size);
2309 if (retval != ERROR_OK)
2310 {
2311 /* we'll never receive a halted condition... issue a false one.. */
2312 gdb_frontend_halted(target, connection);
2313 }
2314 }
2315 }
2316 }
2317 break;
2318 case 'v':
2319 retval = gdb_v_packet(
2320 connection, target,
2321 packet, packet_size);
2322 break;
2323 case 'D':
2324 retval = gdb_detach(connection, target);
2325 extended_protocol = 0;
2326 break;
2327 case 'X':
2328 retval = gdb_write_memory_binary_packet(
2329 connection, target,
2330 packet, packet_size);
2331 if (retval != ERROR_OK)
2332 return retval;
2333 break;
2334 case 'k':
2335 if (extended_protocol != 0)
2336 break;
2337 gdb_put_packet(connection, "OK", 2);
2338 return ERROR_SERVER_REMOTE_CLOSED;
2339 case '!':
2340 /* handle extended remote protocol */
2341 extended_protocol = 1;
2342 gdb_put_packet(connection, "OK", 2);
2343 break;
2344 case 'R':
2345 /* handle extended restart packet */
2346 breakpoint_clear_target(gdb_service->target);
2347 watchpoint_clear_target(gdb_service->target);
2348 command_run_linef(connection->cmd_ctx,
2349 "ocd_gdb_restart %s",
2350 target_name(target));
2351 break;
2352 default:
2353 /* ignore unknown packets */
2354 LOG_DEBUG("ignoring 0x%2.2x packet", packet[0]);
2355 gdb_put_packet(connection, NULL, 0);
2356 break;
2357 }
2358
2359 /* if a packet handler returned an error, exit input loop */
2360 if (retval != ERROR_OK)
2361 return retval;
2362 }
2363
2364 if (gdb_con->ctrl_c)
2365 {
2366 if (target->state == TARGET_RUNNING)
2367 {
2368 retval = target_halt(target);
2369 if (retval != ERROR_OK)
2370 {
2371 target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
2372 }
2373 gdb_con->ctrl_c = 0;
2374 } else
2375 {
2376 LOG_INFO("The target is not running when halt was requested, stopping GDB.");
2377 target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
2378 }
2379 }
2380
2381 } while (gdb_con->buf_cnt > 0);
2382
2383 return ERROR_OK;
2384 }
2385
2386 static int gdb_input(struct connection *connection)
2387 {
2388 int retval = gdb_input_inner(connection);
2389 struct gdb_connection *gdb_con = connection->priv;
2390 if (retval == ERROR_SERVER_REMOTE_CLOSED)
2391 return retval;
2392
2393 /* logging does not propagate the error, yet can set the gdb_con->closed flag */
2394 if (gdb_con->closed)
2395 return ERROR_SERVER_REMOTE_CLOSED;
2396
2397 /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
2398 return ERROR_OK;
2399 }
2400
2401 static int gdb_target_start(struct target *target, uint16_t port)
2402 {
2403 bool use_pipes = 0 == port;
2404 struct gdb_service *gdb_service = malloc(sizeof(struct gdb_service));
2405 if (NULL == gdb_service)
2406 return -ENOMEM;
2407
2408 gdb_service->target = target;
2409
2410 add_service("gdb", use_pipes ? CONNECTION_PIPE : CONNECTION_TCP,
2411 port, 1, &gdb_new_connection, &gdb_input,
2412 &gdb_connection_closed, gdb_service);
2413
2414 const char *name = target_name(target);
2415 if (use_pipes)
2416 LOG_DEBUG("gdb service for target '%s' using pipes", name);
2417 else
2418 LOG_DEBUG("gdb service for target '%s' on TCP port %u", name, port);
2419 return ERROR_OK;
2420 }
2421
2422 static int gdb_target_add_one(struct target *target)
2423 {
2424 if (gdb_port == 0 && server_use_pipes == 0)
2425 {
2426 LOG_INFO("gdb port disabled");
2427 return ERROR_OK;
2428 }
2429 if (0 == gdb_port_next)
2430 gdb_port_next = gdb_port;
2431
2432 bool use_pipes = server_use_pipes;
2433 static bool server_started_with_pipes = false;
2434 if (server_started_with_pipes)
2435 {
2436 LOG_WARNING("gdb service permits one target when using pipes");
2437 if (0 == gdb_port)
2438 return ERROR_OK;
2439
2440 use_pipes = false;
2441 }
2442
2443 int e = gdb_target_start(target, use_pipes ? 0 : gdb_port_next);
2444 if (ERROR_OK == e)
2445 {
2446 server_started_with_pipes |= use_pipes;
2447 gdb_port_next++;
2448 }
2449 return e;
2450 }
2451
2452 int gdb_target_add_all(struct target *target)
2453 {
2454 if (NULL == target)
2455 {
2456 LOG_WARNING("gdb services need one or more targets defined");
2457 return ERROR_OK;
2458 }
2459
2460 while (NULL != target)
2461 {
2462 int retval = gdb_target_add_one(target);
2463 if (ERROR_OK != retval)
2464 return retval;
2465
2466 target = target->next;
2467 }
2468
2469 return ERROR_OK;
2470 }
2471
2472 COMMAND_HANDLER(handle_gdb_sync_command)
2473 {
2474 if (CMD_ARGC != 0)
2475 {
2476 return ERROR_COMMAND_SYNTAX_ERROR;
2477 }
2478
2479 if (current_gdb_connection == NULL)
2480 {
2481 command_print(CMD_CTX,
2482 "gdb_sync command can only be run from within gdb using \"monitor gdb_sync\"");
2483 return ERROR_FAIL;
2484 }
2485
2486 current_gdb_connection->sync = true;
2487
2488 return ERROR_OK;
2489 }
2490
2491 /* daemon configuration command gdb_port */
2492 COMMAND_HANDLER(handle_gdb_port_command)
2493 {
2494 int retval = CALL_COMMAND_HANDLER(server_port_command, &gdb_port);
2495 if (ERROR_OK == retval)
2496 gdb_port_next = gdb_port;
2497 return retval;
2498 }
2499
2500 COMMAND_HANDLER(handle_gdb_memory_map_command)
2501 {
2502 if (CMD_ARGC != 1)
2503 return ERROR_COMMAND_SYNTAX_ERROR;
2504
2505 COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_use_memory_map);
2506 return ERROR_OK;
2507 }
2508
2509 COMMAND_HANDLER(handle_gdb_flash_program_command)
2510 {
2511 if (CMD_ARGC != 1)
2512 return ERROR_COMMAND_SYNTAX_ERROR;
2513
2514 COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_flash_program);
2515 return ERROR_OK;
2516 }
2517
2518 COMMAND_HANDLER(handle_gdb_report_data_abort_command)
2519 {
2520 if (CMD_ARGC != 1)
2521 return ERROR_COMMAND_SYNTAX_ERROR;
2522
2523 COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_report_data_abort);
2524 return ERROR_OK;
2525 }
2526
2527 /* gdb_breakpoint_override */
2528 COMMAND_HANDLER(handle_gdb_breakpoint_override_command)
2529 {
2530 if (CMD_ARGC == 0)
2531 {
2532
2533 } else if (CMD_ARGC == 1)
2534 {
2535 gdb_breakpoint_override = 1;
2536 if (strcmp(CMD_ARGV[0], "hard") == 0)
2537 {
2538 gdb_breakpoint_override_type = BKPT_HARD;
2539 } else if (strcmp(CMD_ARGV[0], "soft") == 0)
2540 {
2541 gdb_breakpoint_override_type = BKPT_SOFT;
2542 } else if (strcmp(CMD_ARGV[0], "disable") == 0)
2543 {
2544 gdb_breakpoint_override = 0;
2545 }
2546 } else
2547 {
2548 return ERROR_COMMAND_SYNTAX_ERROR;
2549 }
2550 if (gdb_breakpoint_override)
2551 {
2552 LOG_USER("force %s breakpoints", (gdb_breakpoint_override_type == BKPT_HARD)?"hard":"soft");
2553 } else
2554 {
2555 LOG_USER("breakpoint type is not overridden");
2556 }
2557
2558 return ERROR_OK;
2559 }
2560
2561 static const struct command_registration gdb_command_handlers[] = {
2562 {
2563 .name = "gdb_sync",
2564 .handler = handle_gdb_sync_command,
2565 .mode = COMMAND_ANY,
2566 .help = "next stepi will return immediately allowing "
2567 "GDB to fetch register state without affecting "
2568 "target state",
2569 },
2570 {
2571 .name = "gdb_port",
2572 .handler = handle_gdb_port_command,
2573 .mode = COMMAND_ANY,
2574 .help = "Display or specify base port on which to listen "
2575 "for incoming GDB connections. "
2576 "No arguments reports GDB port; zero disables.",
2577 .usage = "[port_num]",
2578 },
2579 {
2580 .name = "gdb_memory_map",
2581 .handler = handle_gdb_memory_map_command,
2582 .mode = COMMAND_CONFIG,
2583 .help = "enable or disable memory map",
2584 .usage = "('enable'|'disable')"
2585 },
2586 {
2587 .name = "gdb_flash_program",
2588 .handler = handle_gdb_flash_program_command,
2589 .mode = COMMAND_CONFIG,
2590 .help = "enable or disable flash program",
2591 .usage = "('enable'|'disable')"
2592 },
2593 {
2594 .name = "gdb_report_data_abort",
2595 .handler = handle_gdb_report_data_abort_command,
2596 .mode = COMMAND_CONFIG,
2597 .help = "enable or disable reporting data aborts",
2598 .usage = "('enable'|'disable')"
2599 },
2600 {
2601 .name = "gdb_breakpoint_override",
2602 .handler = handle_gdb_breakpoint_override_command,
2603 .mode = COMMAND_ANY,
2604 .help = "Display or specify type of breakpoint "
2605 "to be used by gdb 'break' commands.",
2606 .usage = "('hard'|'soft'|'disable')"
2607 },
2608 COMMAND_REGISTRATION_DONE
2609 };
2610
2611 int gdb_register_commands(struct command_context *cmd_ctx)
2612 {
2613 return register_commands(cmd_ctx, NULL, gdb_command_handlers);
2614 }

Linking to existing account procedure

If you already have an account and want to add another login method you MUST first sign in with your existing account and then change URL to read https://review.openocd.org/login/?link to get to this page again but this time it'll work for linking. Thank you.

SSH host keys fingerprints

1024 SHA256:YKx8b7u5ZWdcbp7/4AeXNaqElP49m6QrwfXaqQGJAOk gerrit-code-review@openocd.zylin.com (DSA)
384 SHA256:jHIbSQa4REvwCFG4cq5LBlBLxmxSqelQPem/EXIrxjk gerrit-code-review@openocd.org (ECDSA)
521 SHA256:UAOPYkU9Fjtcao0Ul/Rrlnj/OsQvt+pgdYSZ4jOYdgs gerrit-code-review@openocd.org (ECDSA)
256 SHA256:A13M5QlnozFOvTllybRZH6vm7iSt0XLxbA48yfc2yfY gerrit-code-review@openocd.org (ECDSA)
256 SHA256:spYMBqEYoAOtK7yZBrcwE8ZpYt6b68Cfh9yEVetvbXg gerrit-code-review@openocd.org (ED25519)
+--[ED25519 256]--+
|=..              |
|+o..   .         |
|*.o   . .        |
|+B . . .         |
|Bo. = o S        |
|Oo.+ + =         |
|oB=.* = . o      |
| =+=.+   + E     |
|. .=o   . o      |
+----[SHA256]-----+
2048 SHA256:0Onrb7/PHjpo6iVZ7xQX2riKN83FJ3KGU0TvI0TaFG4 gerrit-code-review@openocd.zylin.com (RSA)