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- fix pre_resume script not being called
[openocd.git] / src / server / gdb_server.c
blob850d0de3ab2223876afe9346ac26d215c851948b
1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include "replacements.h"
25
26 #include "gdb_server.h"
27
28 #include "server.h"
29 #include "log.h"
30 #include "binarybuffer.h"
31 #include "jtag.h"
32 #include "breakpoints.h"
33 #include "flash.h"
34 #include "target_request.h"
35 #include "configuration.h"
36
37 #include <string.h>
38 #include <errno.h>
39 #include <unistd.h>
40 #include <stdlib.h>
41
42 #if 0
43 #define _DEBUG_GDB_IO_
44 #endif
45
46 extern int gdb_error(connection_t *connection, int retval);
47 static unsigned short gdb_port;
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 /* set if we are sending a memory map to gdb
65 * via qXfer:memory-map:read packet */
66 /* enabled by default*/
67 int gdb_use_memory_map = 1;
68 /* enabled by default*/
69 int gdb_flash_program = 1;
70
71 /* if set, data aborts cause an error to be reported in memory read packets
72 * see the code in gdb_read_memory_packet() for further explanations */
73 int gdb_report_data_abort = 0;
74
75 int gdb_last_signal(target_t *target)
76 {
77 switch (target->debug_reason)
78 {
79 case DBG_REASON_DBGRQ:
80 return 0x2; /* SIGINT */
81 case DBG_REASON_BREAKPOINT:
82 case DBG_REASON_WATCHPOINT:
83 case DBG_REASON_WPTANDBKPT:
84 return 0x05; /* SIGTRAP */
85 case DBG_REASON_SINGLESTEP:
86 return 0x05; /* SIGTRAP */
87 case DBG_REASON_NOTHALTED:
88 return 0x0; /* no signal... shouldn't happen */
89 default:
90 LOG_USER("undefined debug reason %d - target needs reset", target->debug_reason);
91 return 0x0;
92 }
93 }
94
95 int check_pending(connection_t *connection, int timeout_s, int *got_data)
96 {
97 /* a non-blocking socket will block if there is 0 bytes available on the socket,
98 * but return with as many bytes as are available immediately
99 */
100 struct timeval tv;
101 fd_set read_fds;
102 gdb_connection_t *gdb_con = connection->priv;
103 int t;
104 if (got_data==NULL)
105 got_data=&t;
106 *got_data=0;
107
108 if (gdb_con->buf_cnt>0)
109 {
110 *got_data = 1;
111 return ERROR_OK;
112 }
113
114 FD_ZERO(&read_fds);
115 FD_SET(connection->fd, &read_fds);
116
117 tv.tv_sec = timeout_s;
118 tv.tv_usec = 0;
119 if (select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0)
120 {
121 /* This can typically be because a "monitor" command took too long
122 * before printing any progress messages
123 */
124 if (timeout_s>0)
125 {
126 return ERROR_GDB_TIMEOUT;
127 } else
128 {
129 return ERROR_OK;
130 }
131 }
132 *got_data=FD_ISSET(connection->fd, &read_fds)!=0;
133 return ERROR_OK;
134 }
135
136 int gdb_get_char(connection_t *connection, int* next_char)
137 {
138 gdb_connection_t *gdb_con = connection->priv;
139 int retval=ERROR_OK;
140
141 #ifdef _DEBUG_GDB_IO_
142 char *debug_buffer;
143 #endif
144
145 if (gdb_con->buf_cnt-- > 0)
146 {
147 *next_char = *(gdb_con->buf_p++);
148 if (gdb_con->buf_cnt > 0)
149 connection->input_pending = 1;
150 else
151 connection->input_pending = 0;
152
153 #ifdef _DEBUG_GDB_IO_
154 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
155 #endif
156
157 return ERROR_OK;
158 }
159
160 for (;;)
161 {
162 retval=check_pending(connection, 1, NULL);
163 if (retval!=ERROR_OK)
164 return retval;
165 gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
166 if (gdb_con->buf_cnt > 0)
167 {
168 break;
169 }
170 if (gdb_con->buf_cnt == 0)
171 {
172 gdb_con->closed = 1;
173 return ERROR_SERVER_REMOTE_CLOSED;
174 }
175
176 #ifdef _WIN32
177 errno = WSAGetLastError();
178
179 switch(errno)
180 {
181 case WSAEWOULDBLOCK:
182 usleep(1000);
183 break;
184 case WSAECONNABORTED:
185 gdb_con->closed = 1;
186 return ERROR_SERVER_REMOTE_CLOSED;
187 case WSAECONNRESET:
188 gdb_con->closed = 1;
189 return ERROR_SERVER_REMOTE_CLOSED;
190 default:
191 LOG_ERROR("read: %d", errno);
192 exit(-1);
193 }
194 #else
195 switch(errno)
196 {
197 case EAGAIN:
198 usleep(1000);
199 break;
200 case ECONNABORTED:
201 gdb_con->closed = 1;
202 return ERROR_SERVER_REMOTE_CLOSED;
203 case ECONNRESET:
204 gdb_con->closed = 1;
205 return ERROR_SERVER_REMOTE_CLOSED;
206 default:
207 LOG_ERROR("read: %s", strerror(errno));
208 gdb_con->closed = 1;
209 return ERROR_SERVER_REMOTE_CLOSED;
210 }
211 #endif
212 }
213
214 #ifdef _DEBUG_GDB_IO_
215 debug_buffer = malloc(gdb_con->buf_cnt + 1);
216 memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt);
217 debug_buffer[gdb_con->buf_cnt] = 0;
218 LOG_DEBUG("received '%s'", debug_buffer);
219 free(debug_buffer);
220 #endif
221
222 gdb_con->buf_p = gdb_con->buffer;
223 gdb_con->buf_cnt--;
224 *next_char = *(gdb_con->buf_p++);
225 if (gdb_con->buf_cnt > 0)
226 connection->input_pending = 1;
227 else
228 connection->input_pending = 0;
229 #ifdef _DEBUG_GDB_IO_
230 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
231 #endif
232
233 return retval;
234 }
235
236 int gdb_putback_char(connection_t *connection, int last_char)
237 {
238 gdb_connection_t *gdb_con = connection->priv;
239
240 if (gdb_con->buf_p > gdb_con->buffer)
241 {
242 *(--gdb_con->buf_p) = last_char;
243 gdb_con->buf_cnt++;
244 }
245 else
246 {
247 LOG_ERROR("BUG: couldn't put character back");
248 }
249
250 return ERROR_OK;
251 }
252
253 /* The only way we can detect that the socket is closed is the first time
254 * we write to it, we will fail. Subsequent write operations will
255 * succeed. Shudder! */
256 int gdb_write(connection_t *connection, void *data, int len)
257 {
258 gdb_connection_t *gdb_con = connection->priv;
259 if (gdb_con->closed)
260 return ERROR_SERVER_REMOTE_CLOSED;
261
262 if (write_socket(connection->fd, data, len) == len)
263 {
264 return ERROR_OK;
265 }
266 gdb_con->closed = 1;
267 return ERROR_SERVER_REMOTE_CLOSED;
268 }
269
270 int gdb_put_packet_inner(connection_t *connection, char *buffer, int len)
271 {
272 int i;
273 unsigned char my_checksum = 0;
274 #ifdef _DEBUG_GDB_IO_
275 char *debug_buffer;
276 #endif
277 int reply;
278 int retval;
279 gdb_connection_t *gdb_con = connection->priv;
280
281 for (i = 0; i < len; i++)
282 my_checksum += buffer[i];
283
284 #ifdef _DEBUG_GDB_IO_
285 /*
286 * At this point we should have nothing in the input queue from GDB,
287 * however sometimes '-' is sent even though we've already received
288 * an ACK (+) for everything we've sent off.
289 */
290 #ifndef _WIN32
291 int gotdata;
292 for (;;)
293 {
294 if ((retval=check_pending(connection, 0, &gotdata))!=ERROR_OK)
295 return retval;
296 if (!gotdata)
297 break;
298 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
299 return retval;
300 LOG_WARNING("Discard unexpected char %c", reply);
301 }
302 #endif
303 #endif
304
305 while (1)
306 {
307 #ifdef _DEBUG_GDB_IO_
308 debug_buffer = malloc(len + 1);
309 memcpy(debug_buffer, buffer, len);
310 debug_buffer[len] = 0;
311 LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
312 free(debug_buffer);
313 #endif
314
315 char local_buffer[1024];
316 local_buffer[0] = '$';
317 if (len+4 <= sizeof(local_buffer))
318 {
319 /* performance gain on smaller packets by only a single call to gdb_write() */
320 memcpy(local_buffer+1, buffer, len++);
321 local_buffer[len++] = '#';
322 local_buffer[len++] = DIGITS[(my_checksum >> 4) & 0xf];
323 local_buffer[len++] = DIGITS[my_checksum & 0xf];
324 gdb_write(connection, local_buffer, len);
325 }
326 else
327 {
328 /* larger packets are transmitted directly from caller supplied buffer
329 by several calls to gdb_write() to avoid dynamic allocation */
330 local_buffer[1] = '#';
331 local_buffer[2] = DIGITS[(my_checksum >> 4) & 0xf];
332 local_buffer[3] = DIGITS[my_checksum & 0xf];
333 gdb_write(connection, local_buffer, 1);
334 gdb_write(connection, buffer, len);
335 gdb_write(connection, local_buffer+1, 3);
336 }
337
338 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
339 return retval;
340
341 if (reply == '+')
342 break;
343 else if (reply == '-')
344 {
345 /* Stop sending output packets for now */
346 log_remove_callback(gdb_log_callback, connection);
347 LOG_WARNING("negative reply, retrying");
348 }
349 else if (reply == 0x3)
350 {
351 gdb_con->ctrl_c = 1;
352 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
353 return retval;
354 if (reply == '+')
355 break;
356 else if (reply == '-')
357 {
358 /* Stop sending output packets for now */
359 log_remove_callback(gdb_log_callback, connection);
360 LOG_WARNING("negative reply, retrying");
361 }
362 else
363 {
364 LOG_ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);
365 gdb_con->closed=1;
366 return ERROR_SERVER_REMOTE_CLOSED;
367 }
368 }
369 else
370 {
371 LOG_ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);
372 gdb_con->closed=1;
373 return ERROR_SERVER_REMOTE_CLOSED;
374 }
375 }
376 if (gdb_con->closed)
377 return ERROR_SERVER_REMOTE_CLOSED;
378
379 return ERROR_OK;
380 }
381
382 int gdb_put_packet(connection_t *connection, char *buffer, int len)
383 {
384 gdb_connection_t *gdb_con = connection->priv;
385 gdb_con->busy = 1;
386 int retval = gdb_put_packet_inner(connection, buffer, len);
387 gdb_con->busy = 0;
388 return retval;
389 }
390
391 int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len)
392 {
393 int character;
394 int count = 0;
395 int retval;
396 char checksum[3];
397 unsigned char my_checksum = 0;
398 gdb_connection_t *gdb_con = connection->priv;
399
400 while (1)
401 {
402 do
403 {
404 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
405 return retval;
406
407 #ifdef _DEBUG_GDB_IO_
408 LOG_DEBUG("character: '%c'", character);
409 #endif
410
411 switch (character)
412 {
413 case '$':
414 break;
415 case '+':
416 LOG_WARNING("acknowledgment received, but no packet pending");
417 break;
418 case '-':
419 LOG_WARNING("negative acknowledgment, but no packet pending");
420 break;
421 case 0x3:
422 gdb_con->ctrl_c = 1;
423 *len = 0;
424 return ERROR_OK;
425 default:
426 LOG_WARNING("ignoring character 0x%x", character);
427 break;
428 }
429 } while (character != '$');
430
431 my_checksum = 0;
432
433 count = 0;
434 gdb_connection_t *gdb_con = connection->priv;
435 for (;;)
436 {
437 /* The common case is that we have an entire packet with no escape chars.
438 * We need to leave at least 2 bytes in the buffer to have
439 * gdb_get_char() update various bits and bobs correctly.
440 */
441 if ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt+count) < *len))
442 {
443 /* The compiler will struggle a bit with constant propagation and
444 * aliasing, so we help it by showing that these values do not
445 * change inside the loop
446 */
447 int i;
448 char *buf = gdb_con->buf_p;
449 int run = gdb_con->buf_cnt - 2;
450 i = 0;
451 int done = 0;
452 while (i < run)
453 {
454 character = *buf++;
455 i++;
456 if (character == '#')
457 {
458 /* Danger! character can be '#' when esc is
459 * used so we need an explicit boolean for done here.
460 */
461 done = 1;
462 break;
463 }
464
465 if (character == '}')
466 {
467 /* data transmitted in binary mode (X packet)
468 * uses 0x7d as escape character */
469 my_checksum += character & 0xff;
470 character = *buf++;
471 i++;
472 my_checksum += character & 0xff;
473 buffer[count++] = (character ^ 0x20) & 0xff;
474 } else
475 {
476 my_checksum += character & 0xff;
477 buffer[count++] = character & 0xff;
478 }
479 }
480 gdb_con->buf_p += i;
481 gdb_con->buf_cnt -= i;
482 if (done)
483 break;
484 }
485 if (count > *len)
486 {
487 LOG_ERROR("packet buffer too small");
488 return ERROR_GDB_BUFFER_TOO_SMALL;
489 }
490
491 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
492 return retval;
493
494 if (character == '#')
495 break;
496
497 if (character == '}')
498 {
499 /* data transmitted in binary mode (X packet)
500 * uses 0x7d as escape character */
501 my_checksum += character & 0xff;
502 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
503 return retval;
504 my_checksum += character & 0xff;
505 buffer[count++] = (character ^ 0x20) & 0xff;
506 }
507 else
508 {
509 my_checksum += character & 0xff;
510 buffer[count++] = character & 0xff;
511 }
512
513 }
514
515 *len = count;
516
517 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
518 return retval;
519 checksum[0] = character;
520 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
521 return retval;
522 checksum[1] = character;
523 checksum[2] = 0;
524
525 if (my_checksum == strtoul(checksum, NULL, 16))
526 {
527 gdb_write(connection, "+", 1);
528 break;
529 }
530
531 LOG_WARNING("checksum error, requesting retransmission");
532 gdb_write(connection, "-", 1);
533 }
534 if (gdb_con->closed)
535 return ERROR_SERVER_REMOTE_CLOSED;
536
537 return ERROR_OK;
538 }
539
540 int gdb_get_packet(connection_t *connection, char *buffer, int *len)
541 {
542 gdb_connection_t *gdb_con = connection->priv;
543 gdb_con->busy = 1;
544 int retval = gdb_get_packet_inner(connection, buffer, len);
545 gdb_con->busy = 0;
546 return retval;
547 }
548
549 int gdb_output_con(connection_t *connection, const char* line)
550 {
551 char *hex_buffer;
552 int i, bin_size;
553
554 bin_size = strlen(line);
555
556 hex_buffer = malloc(bin_size*2 + 2);
557 if (hex_buffer == NULL)
558 return ERROR_GDB_BUFFER_TOO_SMALL;
559
560 hex_buffer[0] = 'O';
561 for (i=0; i<bin_size; i++)
562 snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);
563 hex_buffer[bin_size*2+1] = 0;
564
565 gdb_put_packet(connection, hex_buffer, bin_size*2 + 1);
566
567 free(hex_buffer);
568 return ERROR_OK;
569 }
570
571 int gdb_output(struct command_context_s *context, const char* line)
572 {
573 /* this will be dumped to the log and also sent as an O packet if possible */
574 LOG_USER_N("%s", line);
575 return ERROR_OK;
576 }
577
578 int gdb_program_handler(struct target_s *target, enum target_event event, void *priv)
579 {
580 struct command_context_s *cmd_ctx = priv;
581
582 target_invoke_script(cmd_ctx, target, "gdb_program");
583 jtag_execute_queue();
584
585 return ERROR_OK;
586 }
587
588 int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
589 {
590 connection_t *connection = priv;
591 gdb_connection_t *gdb_connection = connection->priv;
592 char sig_reply[4];
593 int signal;
594
595 switch (event)
596 {
597 case TARGET_EVENT_HALTED:
598 /* In the GDB protocol when we are stepping or coninuing execution,
599 * we have a lingering reply. Upon receiving a halted event
600 * when we have that lingering packet, we reply to the original
601 * step or continue packet.
602 *
603 * Executing monitor commands can bring the target in and
604 * out of the running state so we'll see lots of TARGET_EVENT_XXX
605 * that are to be ignored.
606 */
607 if (gdb_connection->frontend_state == TARGET_RUNNING)
608 {
609 /* stop forwarding log packets! */
610 log_remove_callback(gdb_log_callback, connection);
611
612 if (gdb_connection->ctrl_c)
613 {
614 signal = 0x2;
615 gdb_connection->ctrl_c = 0;
616 }
617 else
618 {
619 signal = gdb_last_signal(target);
620 }
621
622 snprintf(sig_reply, 4, "T%2.2x", signal);
623 gdb_put_packet(connection, sig_reply, 3);
624 gdb_connection->frontend_state = TARGET_HALTED;
625 }
626 break;
627 case TARGET_EVENT_GDB_PROGRAM:
628 gdb_program_handler(target, event, connection->cmd_ctx);
629 break;
630 default:
631 break;
632 }
633
634 return ERROR_OK;
635 }
636
637
638 int gdb_new_connection(connection_t *connection)
639 {
640 gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t));
641 gdb_service_t *gdb_service = connection->service->priv;
642 int retval;
643 int initial_ack;
644
645 connection->priv = gdb_connection;
646
647 /* initialize gdb connection information */
648 gdb_connection->buf_p = gdb_connection->buffer;
649 gdb_connection->buf_cnt = 0;
650 gdb_connection->ctrl_c = 0;
651 gdb_connection->frontend_state = TARGET_HALTED;
652 gdb_connection->vflash_image = NULL;
653 gdb_connection->closed = 0;
654 gdb_connection->busy = 0;
655
656 /* send ACK to GDB for debug request */
657 gdb_write(connection, "+", 1);
658
659 /* output goes through gdb connection */
660 command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
661
662 /* register callback to be informed about target events */
663 target_register_event_callback(gdb_target_callback_event_handler, connection);
664
665 /* a gdb session just attached, try to put the target in halt mode.
666 *
667 * DANGER!!!!
668 *
669 * If the halt fails(e.g. target needs a reset, JTAG communication not
670 * working, etc.), then the GDB connect will succeed as
671 * the get_gdb_reg_list() will lie and return a register list with
672 * dummy values.
673 *
674 * This allows GDB monitor commands to be run from a GDB init script to
675 * initialize the target
676 *
677 * Also, since the halt() is asynchronous target connect will be
678 * instantaneous and thus avoiding annoying timeout problems during
679 * connect.
680 */
681 target_halt(gdb_service->target);
682
683 /* remove the initial ACK from the incoming buffer */
684 if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
685 return retval;
686
687 /* FIX!!!??? would we actually ever receive a + here???
688 * Not observed.
689 */
690 if (initial_ack != '+')
691 gdb_putback_char(connection, initial_ack);
692
693 return ERROR_OK;
694 }
695
696 int gdb_connection_closed(connection_t *connection)
697 {
698 gdb_service_t *gdb_service = connection->service->priv;
699 gdb_connection_t *gdb_connection = connection->priv;
700
701 /* see if an image built with vFlash commands is left */
702 if (gdb_connection->vflash_image)
703 {
704 image_close(gdb_connection->vflash_image);
705 free(gdb_connection->vflash_image);
706 gdb_connection->vflash_image = NULL;
707 }
708
709 /* if this connection registered a debug-message receiver delete it */
710 delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
711
712 if (connection->priv)
713 {
714 free(connection->priv);
715 connection->priv = NULL;
716 }
717 else
718 {
719 LOG_ERROR("BUG: connection->priv == NULL");
720 }
721
722 target_unregister_event_callback(gdb_target_callback_event_handler, connection);
723 log_remove_callback(gdb_log_callback, connection);
724
725 return ERROR_OK;
726 }
727
728 void gdb_send_error(connection_t *connection, u8 the_error)
729 {
730 char err[4];
731 snprintf(err, 4, "E%2.2X", the_error );
732 gdb_put_packet(connection, err, 3);
733 }
734
735 int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
736 {
737 char sig_reply[4];
738 int signal;
739
740 signal = gdb_last_signal(target);
741
742 snprintf(sig_reply, 4, "S%2.2x", signal);
743 gdb_put_packet(connection, sig_reply, 3);
744
745 return ERROR_OK;
746 }
747
748 /* Convert register to string of bits. NB! The # of bits in the
749 * register might be non-divisible by 8(a byte), in which
750 * case an entire byte is shown. */
751 void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg)
752 {
753 int i;
754
755 u8 *buf;
756 int buf_len;
757 buf = reg->value;
758 buf_len = CEIL(reg->size, 8);
759
760 for (i = 0; i < buf_len; i++)
761 {
762 tstr[i*2] = DIGITS[(buf[i]>>4) & 0xf];
763 tstr[i*2+1] = DIGITS[buf[i]&0xf];
764 }
765 }
766
767 void gdb_target_to_str(target_t *target, char *tstr, char *str)
768 {
769 int str_len = strlen(tstr);
770 int i;
771
772 if (str_len % 2)
773 {
774 LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
775 exit(-1);
776 }
777
778 for (i = 0; i < str_len; i+=2)
779 {
780 str[str_len - i - 1] = tstr[i + 1];
781 str[str_len - i - 2] = tstr[i];
782 }
783 }
784
785 int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
786 {
787 reg_t **reg_list;
788 int reg_list_size;
789 int retval;
790 int reg_packet_size = 0;
791 char *reg_packet;
792 char *reg_packet_p;
793 int i;
794
795 #ifdef _DEBUG_GDB_IO_
796 LOG_DEBUG("-");
797 #endif
798
799 if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
800 {
801 return gdb_error(connection, retval);
802 }
803
804 for (i = 0; i < reg_list_size; i++)
805 {
806 reg_packet_size += reg_list[i]->size;
807 }
808
809 reg_packet = malloc(CEIL(reg_packet_size, 8) * 2);
810 reg_packet_p = reg_packet;
811
812 for (i = 0; i < reg_list_size; i++)
813 {
814 gdb_str_to_target(target, reg_packet_p, reg_list[i]);
815 reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;
816 }
817
818 #ifdef _DEBUG_GDB_IO_
819 {
820 char *reg_packet_p;
821 reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
822 LOG_DEBUG("reg_packet: %s", reg_packet_p);
823 free(reg_packet_p);
824 }
825 #endif
826
827 gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);
828 free(reg_packet);
829
830 free(reg_list);
831
832 return ERROR_OK;
833 }
834
835 int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
836 {
837 int i;
838 reg_t **reg_list;
839 int reg_list_size;
840 int retval;
841 char *packet_p;
842
843 #ifdef _DEBUG_GDB_IO_
844 LOG_DEBUG("-");
845 #endif
846
847 /* skip command character */
848 packet++;
849 packet_size--;
850
851 if (packet_size % 2)
852 {
853 LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection");
854 return ERROR_SERVER_REMOTE_CLOSED;
855 }
856
857 if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
858 {
859 return gdb_error(connection, retval);
860 }
861
862 packet_p = packet;
863 for (i = 0; i < reg_list_size; i++)
864 {
865 u8 *bin_buf;
866 char *hex_buf;
867 reg_arch_type_t *arch_type;
868
869 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
870 hex_buf = malloc(CEIL(reg_list[i]->size, 8) * 2);
871 gdb_target_to_str(target, packet_p, hex_buf);
872
873 /* convert hex-string to binary buffer */
874 bin_buf = malloc(CEIL(reg_list[i]->size, 8));
875 str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16);
876
877 /* get register arch_type, and call set method */
878 arch_type = register_get_arch_type(reg_list[i]->arch_type);
879 if (arch_type == NULL)
880 {
881 LOG_ERROR("BUG: encountered unregistered arch type");
882 exit(-1);
883 }
884 arch_type->set(reg_list[i], bin_buf);
885
886 /* advance packet pointer */
887 packet_p += (CEIL(reg_list[i]->size, 8) * 2);
888
889 free(bin_buf);
890 free(hex_buf);
891 }
892
893 /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
894 free(reg_list);
895
896 gdb_put_packet(connection, "OK", 2);
897
898 return ERROR_OK;
899 }
900
901 int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
902 {
903 char *reg_packet;
904 int reg_num = strtoul(packet + 1, NULL, 16);
905 reg_t **reg_list;
906 int reg_list_size;
907 int retval;
908
909 #ifdef _DEBUG_GDB_IO_
910 LOG_DEBUG("-");
911 #endif
912
913 if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
914 {
915 return gdb_error(connection, retval);
916 }
917
918 if (reg_list_size <= reg_num)
919 {
920 LOG_ERROR("gdb requested a non-existing register");
921 exit(-1);
922 }
923
924 reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
925
926 gdb_str_to_target(target, reg_packet, reg_list[reg_num]);
927
928 gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2);
929
930 free(reg_list);
931 free(reg_packet);
932
933 return ERROR_OK;
934 }
935
936 int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
937 {
938 char *separator;
939 char *hex_buf;
940 u8 *bin_buf;
941 int reg_num = strtoul(packet + 1, &separator, 16);
942 reg_t **reg_list;
943 int reg_list_size;
944 int retval;
945 reg_arch_type_t *arch_type;
946
947 LOG_DEBUG("-");
948
949 if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
950 {
951 return gdb_error(connection, retval);
952 }
953
954 if (reg_list_size < reg_num)
955 {
956 LOG_ERROR("gdb requested a non-existing register");
957 return ERROR_SERVER_REMOTE_CLOSED;
958 }
959
960 if (*separator != '=')
961 {
962 LOG_ERROR("GDB 'set register packet', but no '=' following the register number");
963 return ERROR_SERVER_REMOTE_CLOSED;
964 }
965
966 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
967 hex_buf = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
968 gdb_target_to_str(target, separator + 1, hex_buf);
969
970 /* convert hex-string to binary buffer */
971 bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
972 str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16);
973
974 /* get register arch_type, and call set method */
975 arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
976 if (arch_type == NULL)
977 {
978 LOG_ERROR("BUG: encountered unregistered arch type");
979 exit(-1);
980 }
981 arch_type->set(reg_list[reg_num], bin_buf);
982
983 gdb_put_packet(connection, "OK", 2);
984
985 free(bin_buf);
986 free(hex_buf);
987 free(reg_list);
988
989 return ERROR_OK;
990 }
991
992 int gdb_error(connection_t *connection, int retval)
993 {
994 switch (retval)
995 {
996 case ERROR_TARGET_DATA_ABORT:
997 gdb_send_error(connection, EIO);
998 break;
999 case ERROR_TARGET_TRANSLATION_FAULT:
1000 gdb_send_error(connection, EFAULT);
1001 break;
1002 case ERROR_TARGET_UNALIGNED_ACCESS:
1003 gdb_send_error(connection, EFAULT);
1004 break;
1005 case ERROR_TARGET_NOT_HALTED:
1006 gdb_send_error(connection, EFAULT);
1007 break;
1008 default:
1009 /* This could be that the target reset itself. */
1010 LOG_ERROR("unexpected error %i", retval);
1011 gdb_send_error(connection, EFAULT);
1012 break;
1013 }
1014
1015 return ERROR_OK;
1016 }
1017
1018 /* We don't have to worry about the default 2 second timeout for GDB packets,
1019 * because GDB breaks up large memory reads into smaller reads.
1020 *
1021 * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
1022 */
1023 int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1024 {
1025 char *separator;
1026 u32 addr = 0;
1027 u32 len = 0;
1028
1029 u8 *buffer;
1030 char *hex_buffer;
1031
1032 int retval = ERROR_OK;
1033
1034 /* skip command character */
1035 packet++;
1036
1037 addr = strtoul(packet, &separator, 16);
1038
1039 if (*separator != ',')
1040 {
1041 LOG_ERROR("incomplete read memory packet received, dropping connection");
1042 return ERROR_SERVER_REMOTE_CLOSED;
1043 }
1044
1045 len = strtoul(separator+1, NULL, 16);
1046
1047 buffer = malloc(len);
1048
1049 LOG_DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
1050
1051 retval = target_read_buffer(target, addr, len, buffer);
1052
1053 if ((retval == ERROR_TARGET_DATA_ABORT) && (!gdb_report_data_abort))
1054 {
1055 /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
1056 * At some point this might be fixed in GDB, in which case this code can be removed.
1057 *
1058 * OpenOCD developers are acutely aware of this problem, but there is nothing
1059 * gained by involving the user in this problem that hopefully will get resolved
1060 * eventually
1061 *
1062 * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=2395
1063 *
1064 * For now, the default is to fix up things to make current GDB versions work.
1065 * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
1066 */
1067 memset(buffer, 0, len);
1068 retval = ERROR_OK;
1069 }
1070
1071 if (retval == ERROR_OK)
1072 {
1073 hex_buffer = malloc(len * 2 + 1);
1074
1075 int i;
1076 for (i = 0; i < len; i++)
1077 {
1078 u8 t = buffer[i];
1079 hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf];
1080 hex_buffer[2 * i + 1] = DIGITS[t & 0xf];
1081 }
1082
1083 gdb_put_packet(connection, hex_buffer, len * 2);
1084
1085 free(hex_buffer);
1086 }
1087 else
1088 {
1089 retval = gdb_error(connection, retval);
1090 }
1091
1092 free(buffer);
1093
1094 return retval;
1095 }
1096
1097 int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1098 {
1099 char *separator;
1100 u32 addr = 0;
1101 u32 len = 0;
1102
1103 u8 *buffer;
1104
1105 int i;
1106 int retval;
1107
1108 /* skip command character */
1109 packet++;
1110
1111 addr = strtoul(packet, &separator, 16);
1112
1113 if (*separator != ',')
1114 {
1115 LOG_ERROR("incomplete write memory packet received, dropping connection");
1116 return ERROR_SERVER_REMOTE_CLOSED;
1117 }
1118
1119 len = strtoul(separator+1, &separator, 16);
1120
1121 if (*(separator++) != ':')
1122 {
1123 LOG_ERROR("incomplete write memory packet received, dropping connection");
1124 return ERROR_SERVER_REMOTE_CLOSED;
1125 }
1126
1127 buffer = malloc(len);
1128
1129 LOG_DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
1130
1131 for (i=0; i<len; i++)
1132 {
1133 u32 tmp;
1134 sscanf(separator + 2*i, "%2x", &tmp);
1135 buffer[i] = tmp;
1136 }
1137
1138 retval = target_write_buffer(target, addr, len, buffer);
1139
1140 if (retval == ERROR_OK)
1141 {
1142 gdb_put_packet(connection, "OK", 2);
1143 }
1144 else
1145 {
1146 retval = gdb_error(connection, retval);
1147 }
1148
1149 free(buffer);
1150
1151 return retval;
1152 }
1153
1154 int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1155 {
1156 char *separator;
1157 u32 addr = 0;
1158 u32 len = 0;
1159
1160 int retval;
1161
1162 /* skip command character */
1163 packet++;
1164
1165 addr = strtoul(packet, &separator, 16);
1166
1167 if (*separator != ',')
1168 {
1169 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1170 return ERROR_SERVER_REMOTE_CLOSED;
1171 }
1172
1173 len = strtoul(separator+1, &separator, 16);
1174
1175 if (*(separator++) != ':')
1176 {
1177 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1178 return ERROR_SERVER_REMOTE_CLOSED;
1179 }
1180
1181 retval = ERROR_OK;
1182 if (len)
1183 {
1184 LOG_DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
1185
1186 retval = target_write_buffer(target, addr, len, (u8*)separator);
1187 }
1188
1189 if (retval == ERROR_OK)
1190 {
1191 gdb_put_packet(connection, "OK", 2);
1192 }
1193 else
1194 {
1195 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1196 return retval;
1197 }
1198
1199 return ERROR_OK;
1200 }
1201
1202 void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1203 {
1204 int current = 0;
1205 u32 address = 0x0;
1206
1207 LOG_DEBUG("-");
1208
1209 if (packet_size > 1)
1210 {
1211 packet[packet_size] = 0;
1212 address = strtoul(packet + 1, NULL, 16);
1213 }
1214 else
1215 {
1216 current = 1;
1217 }
1218
1219 if (packet[0] == 'c')
1220 {
1221 LOG_DEBUG("continue");
1222 target_invoke_script(connection->cmd_ctx, target, "pre_resume");
1223 target_resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
1224 }
1225 else if (packet[0] == 's')
1226 {
1227 LOG_DEBUG("step");
1228 target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */
1229 }
1230 }
1231
1232 int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1233 {
1234 int type;
1235 enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
1236 enum watchpoint_rw wp_type;
1237 u32 address;
1238 u32 size;
1239 char *separator;
1240 int retval;
1241
1242 LOG_DEBUG("-");
1243
1244 type = strtoul(packet + 1, &separator, 16);
1245
1246 if (type == 0) /* memory breakpoint */
1247 bp_type = BKPT_SOFT;
1248 else if (type == 1) /* hardware breakpoint */
1249 bp_type = BKPT_HARD;
1250 else if (type == 2) /* write watchpoint */
1251 wp_type = WPT_WRITE;
1252 else if (type == 3) /* read watchpoint */
1253 wp_type = WPT_READ;
1254 else if (type == 4) /* access watchpoint */
1255 wp_type = WPT_ACCESS;
1256
1257 if (*separator != ',')
1258 {
1259 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1260 return ERROR_SERVER_REMOTE_CLOSED;
1261 }
1262
1263 address = strtoul(separator+1, &separator, 16);
1264
1265 if (*separator != ',')
1266 {
1267 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1268 return ERROR_SERVER_REMOTE_CLOSED;
1269 }
1270
1271 size = strtoul(separator+1, &separator, 16);
1272
1273 switch (type)
1274 {
1275 case 0:
1276 case 1:
1277 if (packet[0] == 'Z')
1278 {
1279 if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
1280 {
1281 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1282 return retval;
1283 }
1284 else
1285 {
1286 gdb_put_packet(connection, "OK", 2);
1287 }
1288 }
1289 else
1290 {
1291 breakpoint_remove(target, address);
1292 gdb_put_packet(connection, "OK", 2);
1293 }
1294 break;
1295 case 2:
1296 case 3:
1297 case 4:
1298 {
1299 if (packet[0] == 'Z')
1300 {
1301 if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
1302 {
1303 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1304 return retval;
1305 }
1306 else
1307 {
1308 gdb_put_packet(connection, "OK", 2);
1309 }
1310 }
1311 else
1312 {
1313 watchpoint_remove(target, address);
1314 gdb_put_packet(connection, "OK", 2);
1315 }
1316 break;
1317 }
1318 default:
1319 break;
1320 }
1321
1322 return ERROR_OK;
1323 }
1324
1325 /* print out a string and allocate more space as needed, mainly used for XML at this point */
1326 void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, ...)
1327 {
1328 if (*retval != ERROR_OK)
1329 {
1330 return;
1331 }
1332 int first = 1;
1333
1334 for (;;)
1335 {
1336 if ((*xml == NULL) || (!first))
1337 {
1338 /* start by 0 to exercise all the code paths.
1339 * Need minimum 2 bytes to fit 1 char and 0 terminator. */
1340
1341 *size = *size * 2 + 2;
1342 char *t = *xml;
1343 *xml = realloc(*xml, *size);
1344 if (*xml == NULL)
1345 {
1346 if (t)
1347 free(t);
1348 *retval = ERROR_SERVER_REMOTE_CLOSED;
1349 return;
1350 }
1351 }
1352
1353 va_list ap;
1354 int ret;
1355 va_start(ap, fmt);
1356 ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
1357 va_end(ap);
1358 if ((ret > 0) && ((ret + 1) < *size - *pos))
1359 {
1360 *pos += ret;
1361 return;
1362 }
1363 /* there was just enough or not enough space, allocate more. */
1364 first = 0;
1365 }
1366 }
1367
1368 static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len)
1369 {
1370 char *separator;
1371
1372 /* Extract and NUL-terminate the annex. */
1373 *annex = buf;
1374 while (*buf && *buf != ':')
1375 buf++;
1376 if (*buf == '\0')
1377 return -1;
1378 *buf++ = 0;
1379
1380 /* After the read marker and annex, qXfer looks like a
1381 * traditional 'm' packet. */
1382
1383 *ofs = strtoul(buf, &separator, 16);
1384
1385 if (*separator != ',')
1386 return -1;
1387
1388 *len = strtoul(separator+1, NULL, 16);
1389
1390 return 0;
1391 }
1392
1393 int gdb_calc_blocksize(flash_bank_t *bank)
1394 {
1395 int i;
1396 int block_size = 0xffffffff;
1397
1398 /* loop through all sectors and return smallest sector size */
1399
1400 for (i = 0; i < bank->num_sectors; i++)
1401 {
1402 if (bank->sectors[i].size < block_size)
1403 block_size = bank->sectors[i].size;
1404 }
1405
1406 return block_size;
1407 }
1408
1409 static int compare_bank (const void * a, const void * b)
1410 {
1411 flash_bank_t *b1, *b2;
1412 b1=*((flash_bank_t **)a);
1413 b2=*((flash_bank_t **)b);
1414
1415 if (b1->base==b2->base)
1416 {
1417 return 0;
1418 } else if (b1->base>b2->base)
1419 {
1420 return 1;
1421 } else
1422 {
1423 return -1;
1424 }
1425 }
1426
1427 int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1428 {
1429 command_context_t *cmd_ctx = connection->cmd_ctx;
1430
1431 if (strstr(packet, "qRcmd,"))
1432 {
1433 if (packet_size > 6)
1434 {
1435 char *cmd;
1436 int i;
1437 cmd = malloc((packet_size - 6)/2 + 1);
1438 for (i=0; i < (packet_size - 6)/2; i++)
1439 {
1440 u32 tmp;
1441 sscanf(packet + 6 + 2*i, "%2x", &tmp);
1442 cmd[i] = tmp;
1443 }
1444 cmd[(packet_size - 6)/2] = 0x0;
1445
1446 /* We want to print all debug output to GDB connection */
1447 log_add_callback(gdb_log_callback, connection);
1448 target_call_timer_callbacks_now();
1449 command_run_line(cmd_ctx, cmd);
1450 target_call_timer_callbacks_now();
1451 log_remove_callback(gdb_log_callback, connection);
1452 free(cmd);
1453 }
1454 gdb_put_packet(connection, "OK", 2);
1455 return ERROR_OK;
1456 }
1457 else if (strstr(packet, "qCRC:"))
1458 {
1459 if (packet_size > 5)
1460 {
1461 int retval;
1462 char gdb_reply[10];
1463 char *separator;
1464 u32 checksum;
1465 u32 addr = 0;
1466 u32 len = 0;
1467
1468 /* skip command character */
1469 packet += 5;
1470
1471 addr = strtoul(packet, &separator, 16);
1472
1473 if (*separator != ',')
1474 {
1475 LOG_ERROR("incomplete read memory packet received, dropping connection");
1476 return ERROR_SERVER_REMOTE_CLOSED;
1477 }
1478
1479 len = strtoul(separator + 1, NULL, 16);
1480
1481 retval = target_checksum_memory(target, addr, len, &checksum);
1482
1483 if (retval == ERROR_OK)
1484 {
1485 snprintf(gdb_reply, 10, "C%8.8x", checksum);
1486 gdb_put_packet(connection, gdb_reply, 9);
1487 }
1488 else
1489 {
1490 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1491 return retval;
1492 }
1493
1494 return ERROR_OK;
1495 }
1496 }
1497 else if (strstr(packet, "qSupported"))
1498 {
1499 /* we currently support packet size and qXfer:memory-map:read (if enabled)
1500 * disable qXfer:features:read for the moment */
1501 int retval = ERROR_OK;
1502 char *buffer = NULL;
1503 int pos = 0;
1504 int size = 0;
1505
1506 xml_printf(&retval, &buffer, &pos, &size,
1507 "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-",
1508 (GDB_BUFFER_SIZE - 1), gdb_use_memory_map == 1 ? '+' : '-');
1509
1510 if (retval != ERROR_OK)
1511 {
1512 gdb_send_error(connection, 01);
1513 return ERROR_OK;
1514 }
1515
1516 gdb_put_packet(connection, buffer, strlen(buffer));
1517 free(buffer);
1518
1519 return ERROR_OK;
1520 }
1521 else if (strstr(packet, "qXfer:memory-map:read::"))
1522 {
1523 /* We get away with only specifying flash here. Regions that are not
1524 * specified are treated as if we provided no memory map(if not we
1525 * could detect the holes and mark them as RAM).
1526 * Normally we only execute this code once, but no big deal if we
1527 * have to regenerate it a couple of times. */
1528
1529 flash_bank_t *p;
1530 char *xml = NULL;
1531 int size = 0;
1532 int pos = 0;
1533 int retval = ERROR_OK;
1534
1535 int offset;
1536 int length;
1537 char *separator;
1538 int blocksize;
1539
1540 /* skip command character */
1541 packet += 23;
1542
1543 offset = strtoul(packet, &separator, 16);
1544 length = strtoul(separator + 1, &separator, 16);
1545
1546 xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
1547
1548 /*
1549 sort banks in ascending order, we need to make non-flash memory be ram(or rather
1550 read/write) by default for GDB.
1551 GDB does not have a concept of non-cacheable read/write memory.
1552 */
1553 flash_bank_t **banks=malloc(sizeof(flash_bank_t *)*flash_get_bank_count());
1554 int i;
1555
1556 for (i=0; i<flash_get_bank_count(); i++)
1557 {
1558 p = get_flash_bank_by_num(i);
1559 if (p == NULL)
1560 {
1561 free(banks);
1562 retval = ERROR_FAIL;
1563 gdb_send_error(connection, retval);
1564 return retval;
1565 }
1566 banks[i]=p;
1567 }
1568
1569 qsort(banks, flash_get_bank_count(), sizeof(flash_bank_t *), compare_bank);
1570
1571 u32 ram_start=0;
1572 for (i=0; i<flash_get_bank_count(); i++)
1573 {
1574 p = banks[i];
1575
1576 if (ram_start<p->base)
1577 {
1578 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
1579 ram_start, p->base-ram_start);
1580 }
1581
1582 /* if device has uneven sector sizes, eg. str7, lpc
1583 * we pass the smallest sector size to gdb memory map */
1584 blocksize = gdb_calc_blocksize(p);
1585
1586 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" start=\"0x%x\" length=\"0x%x\">\n" \
1587 "<property name=\"blocksize\">0x%x</property>\n" \
1588 "</memory>\n", \
1589 p->base, p->size, blocksize);
1590 ram_start=p->base+p->size;
1591 }
1592 if (ram_start!=0)
1593 {
1594 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
1595 ram_start, 0-ram_start);
1596 } else
1597 {
1598 /* a flash chip could be at the very end of the 32 bit address space, in which case
1599 ram_start will be precisely 0 */
1600 }
1601
1602 free(banks);
1603 banks = NULL;
1604
1605 xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
1606
1607 if (retval != ERROR_OK)
1608 {
1609 gdb_send_error(connection, retval);
1610 return retval;
1611 }
1612
1613 if (offset + length > pos)
1614 {
1615 length = pos - offset;
1616 }
1617
1618 char *t = malloc(length + 1);
1619 t[0] = 'l';
1620 memcpy(t + 1, xml + offset, length);
1621 gdb_put_packet(connection, t, length + 1);
1622
1623 free(t);
1624 free(xml);
1625 return ERROR_OK;
1626 }
1627 else if (strstr(packet, "qXfer:features:read:"))
1628 {
1629 char *xml = NULL;
1630 int size = 0;
1631 int pos = 0;
1632 int retval = ERROR_OK;
1633
1634 int offset;
1635 unsigned int length;
1636 char *annex;
1637
1638 /* skip command character */
1639 packet += 20;
1640
1641 if (decode_xfer_read(packet, &annex, &offset, &length) < 0)
1642 {
1643 gdb_send_error(connection, 01);
1644 return ERROR_OK;
1645 }
1646
1647 if (strcmp(annex, "target.xml") != 0)
1648 {
1649 gdb_send_error(connection, 01);
1650 return ERROR_OK;
1651 }
1652
1653 xml_printf(&retval, &xml, &pos, &size, \
1654 "l<target version=\"1.0\">\n<architecture>arm</architecture>\n</target>\n");
1655
1656 if (retval != ERROR_OK)
1657 {
1658 gdb_send_error(connection, retval);
1659 return retval;
1660 }
1661
1662 gdb_put_packet(connection, xml, strlen(xml));
1663
1664 free(xml);
1665 return ERROR_OK;
1666 }
1667
1668 gdb_put_packet(connection, "", 0);
1669 return ERROR_OK;
1670 }
1671
1672 int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1673 {
1674 gdb_connection_t *gdb_connection = connection->priv;
1675 gdb_service_t *gdb_service = connection->service->priv;
1676 int result;
1677
1678 /* if flash programming disabled - send a empty reply */
1679
1680 if (gdb_flash_program == 0)
1681 {
1682 gdb_put_packet(connection, "", 0);
1683 return ERROR_OK;
1684 }
1685
1686 if (strstr(packet, "vFlashErase:"))
1687 {
1688 unsigned long addr;
1689 unsigned long length;
1690
1691 char *parse = packet + 12;
1692 if (*parse == '\0')
1693 {
1694 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1695 return ERROR_SERVER_REMOTE_CLOSED;
1696 }
1697
1698 addr = strtoul(parse, &parse, 16);
1699
1700 if (*(parse++) != ',' || *parse == '\0')
1701 {
1702 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1703 return ERROR_SERVER_REMOTE_CLOSED;
1704 }
1705
1706 length = strtoul(parse, &parse, 16);
1707
1708 if (*parse != '\0')
1709 {
1710 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1711 return ERROR_SERVER_REMOTE_CLOSED;
1712 }
1713
1714 /* assume all sectors need erasing - stops any problems
1715 * when flash_write is called multiple times */
1716 flash_set_dirty();
1717
1718 /* perform any target specific operations before the erase */
1719 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_PROGRAM);
1720
1721 /* perform erase */
1722 if ((result = flash_erase_address_range(gdb_service->target, addr, length)) != ERROR_OK)
1723 {
1724 /* GDB doesn't evaluate the actual error number returned,
1725 * treat a failed erase as an I/O error
1726 */
1727 gdb_send_error(connection, EIO);
1728 LOG_ERROR("flash_erase returned %i", result);
1729 }
1730 else
1731 gdb_put_packet(connection, "OK", 2);
1732
1733 return ERROR_OK;
1734 }
1735
1736 if (strstr(packet, "vFlashWrite:"))
1737 {
1738 unsigned long addr;
1739 unsigned long length;
1740 char *parse = packet + 12;
1741
1742 if (*parse == '\0')
1743 {
1744 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1745 return ERROR_SERVER_REMOTE_CLOSED;
1746 }
1747 addr = strtoul(parse, &parse, 16);
1748 if (*(parse++) != ':')
1749 {
1750 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1751 return ERROR_SERVER_REMOTE_CLOSED;
1752 }
1753 length = packet_size - (parse - packet);
1754
1755 /* create a new image if there isn't already one */
1756 if (gdb_connection->vflash_image == NULL)
1757 {
1758 gdb_connection->vflash_image = malloc(sizeof(image_t));
1759 image_open(gdb_connection->vflash_image, "", "build");
1760 }
1761
1762 /* create new section with content from packet buffer */
1763 image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (u8*)parse);
1764
1765 gdb_put_packet(connection, "OK", 2);
1766
1767 return ERROR_OK;
1768 }
1769
1770 if (!strcmp(packet, "vFlashDone"))
1771 {
1772 u32 written;
1773
1774 /* process the flashing buffer. No need to erase as GDB
1775 * always issues a vFlashErase first. */
1776 if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0)) != ERROR_OK)
1777 {
1778 if (result == ERROR_FLASH_DST_OUT_OF_BANK)
1779 gdb_put_packet(connection, "E.memtype", 9);
1780 else
1781 gdb_send_error(connection, EIO);
1782 }
1783 else
1784 {
1785 LOG_DEBUG("wrote %u bytes from vFlash image to flash", written);
1786 gdb_put_packet(connection, "OK", 2);
1787 }
1788
1789 image_close(gdb_connection->vflash_image);
1790 free(gdb_connection->vflash_image);
1791 gdb_connection->vflash_image = NULL;
1792
1793 return ERROR_OK;
1794 }
1795
1796 gdb_put_packet(connection, "", 0);
1797 return ERROR_OK;
1798 }
1799
1800 int gdb_detach(connection_t *connection, target_t *target)
1801 {
1802 switch( detach_mode )
1803 {
1804 case GDB_DETACH_RESUME:
1805 target_invoke_script(connection->cmd_ctx, target, "pre_resume");
1806 target_resume(target, 1, 0, 1, 0);
1807 break;
1808
1809 case GDB_DETACH_RESET:
1810 target_process_reset(connection->cmd_ctx);
1811 break;
1812
1813 case GDB_DETACH_HALT:
1814 target_halt(target);
1815 break;
1816
1817 case GDB_DETACH_NOTHING:
1818 break;
1819 }
1820
1821 gdb_put_packet(connection, "OK", 2);
1822
1823 return ERROR_OK;
1824 }
1825
1826 static void gdb_log_callback(void *priv, const char *file, int line,
1827 const char *function, const char *string)
1828 {
1829 connection_t *connection = priv;
1830 gdb_connection_t *gdb_con = connection->priv;
1831
1832 if (gdb_con->busy)
1833 {
1834 /* do not reply this using the O packet */
1835 return;
1836 }
1837
1838 gdb_output_con(connection, string);
1839 }
1840
1841 /* Do not allocate this on the stack */
1842 char gdb_packet_buffer[GDB_BUFFER_SIZE];
1843
1844 int gdb_input_inner(connection_t *connection)
1845 {
1846 gdb_service_t *gdb_service = connection->service->priv;
1847 target_t *target = gdb_service->target;
1848 char *packet=gdb_packet_buffer;
1849 int packet_size;
1850 int retval;
1851 gdb_connection_t *gdb_con = connection->priv;
1852 static int extended_protocol = 0;
1853
1854 /* drain input buffer */
1855 do
1856 {
1857 packet_size = GDB_BUFFER_SIZE-1;
1858 if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)
1859 {
1860 return retval;
1861 }
1862
1863 /* terminate with zero */
1864 packet[packet_size] = 0;
1865
1866 LOG_DEBUG("received packet: '%s'", packet);
1867
1868 if (packet_size > 0)
1869 {
1870 retval = ERROR_OK;
1871 switch (packet[0])
1872 {
1873 case 'H':
1874 /* Hct... -- set thread
1875 * we don't have threads, send empty reply */
1876 gdb_put_packet(connection, NULL, 0);
1877 break;
1878 case 'q':
1879 retval = gdb_query_packet(connection, target, packet, packet_size);
1880 break;
1881 case 'g':
1882 retval = gdb_get_registers_packet(connection, target, packet, packet_size);
1883 break;
1884 case 'G':
1885 retval = gdb_set_registers_packet(connection, target, packet, packet_size);
1886 break;
1887 case 'p':
1888 retval = gdb_get_register_packet(connection, target, packet, packet_size);
1889 break;
1890 case 'P':
1891 retval = gdb_set_register_packet(connection, target, packet, packet_size);
1892 break;
1893 case 'm':
1894 retval = gdb_read_memory_packet(connection, target, packet, packet_size);
1895 break;
1896 case 'M':
1897 retval = gdb_write_memory_packet(connection, target, packet, packet_size);
1898 break;
1899 case 'z':
1900 case 'Z':
1901 retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
1902 break;
1903 case '?':
1904 gdb_last_signal_packet(connection, target, packet, packet_size);
1905 break;
1906 case 'c':
1907 case 's':
1908 {
1909 if (target->state != TARGET_HALTED)
1910 {
1911 /* If the target isn't in the halted state, then we can't
1912 * step/continue. This might be early setup, etc.
1913 */
1914 char sig_reply[4];
1915 snprintf(sig_reply, 4, "T%2.2x", 2);
1916 gdb_put_packet(connection, sig_reply, 3);
1917 } else
1918 {
1919 /* We're running/stepping, in which case we can
1920 * forward log output until the target is halted
1921 */
1922 gdb_connection_t *gdb_con = connection->priv;
1923 gdb_con->frontend_state = TARGET_RUNNING;
1924 log_add_callback(gdb_log_callback, connection);
1925 gdb_step_continue_packet(connection, target, packet, packet_size);
1926 }
1927 }
1928 break;
1929 case 'v':
1930 retval = gdb_v_packet(connection, target, packet, packet_size);
1931 break;
1932 case 'D':
1933 retval = gdb_detach(connection, target);
1934 extended_protocol = 0;
1935 break;
1936 case 'X':
1937 if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)
1938 return retval;
1939 break;
1940 case 'k':
1941 if (extended_protocol != 0)
1942 break;
1943 gdb_put_packet(connection, "OK", 2);
1944 return ERROR_SERVER_REMOTE_CLOSED;
1945 case '!':
1946 /* handle extended remote protocol */
1947 extended_protocol = 1;
1948 gdb_put_packet(connection, "OK", 2);
1949 break;
1950 case 'R':
1951 /* handle extended restart packet */
1952 target_process_reset(connection->cmd_ctx);
1953 break;
1954 default:
1955 /* ignore unkown packets */
1956 LOG_DEBUG("ignoring 0x%2.2x packet", packet[0]);
1957 gdb_put_packet(connection, NULL, 0);
1958 break;
1959 }
1960
1961 /* if a packet handler returned an error, exit input loop */
1962 if (retval != ERROR_OK)
1963 return retval;
1964 }
1965
1966 if (gdb_con->ctrl_c)
1967 {
1968 if (target->state == TARGET_RUNNING)
1969 {
1970 target_halt(target);
1971 gdb_con->ctrl_c = 0;
1972 }
1973 }
1974
1975 } while (gdb_con->buf_cnt > 0);
1976
1977 return ERROR_OK;
1978 }
1979
1980 int gdb_input(connection_t *connection)
1981 {
1982 int retval = gdb_input_inner(connection);
1983 gdb_connection_t *gdb_con = connection->priv;
1984 if (retval == ERROR_SERVER_REMOTE_CLOSED)
1985 return retval;
1986
1987 /* logging does not propagate the error, yet can set th gdb_con->closed flag */
1988 if (gdb_con->closed)
1989 return ERROR_SERVER_REMOTE_CLOSED;
1990
1991 /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
1992 return ERROR_OK;
1993 }
1994
1995 int gdb_init()
1996 {
1997 gdb_service_t *gdb_service;
1998 target_t *target = targets;
1999 int i = 0;
2000
2001 if (!target)
2002 {
2003 LOG_WARNING("no gdb ports allocated as no target has been specified");
2004 return ERROR_OK;
2005 }
2006
2007 if (gdb_port == 0)
2008 {
2009 LOG_WARNING("no gdb port specified, using default port 3333");
2010 gdb_port = 3333;
2011 }
2012
2013 while (target)
2014 {
2015 char service_name[8];
2016
2017 snprintf(service_name, 8, "gdb-%2.2i", i);
2018
2019 gdb_service = malloc(sizeof(gdb_service_t));
2020 gdb_service->target = target;
2021
2022 add_service("gdb", CONNECTION_GDB, gdb_port + i, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
2023
2024 LOG_DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i);
2025
2026 i++;
2027 target = target->next;
2028 }
2029
2030 return ERROR_OK;
2031 }
2032
2033 /* daemon configuration command gdb_port */
2034 int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2035 {
2036 if (argc == 0)
2037 return ERROR_OK;
2038
2039 /* only if the port wasn't overwritten by cmdline */
2040 if (gdb_port == 0)
2041 gdb_port = strtoul(args[0], NULL, 0);
2042
2043 return ERROR_OK;
2044 }
2045
2046 int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2047 {
2048 if (argc == 1)
2049 {
2050 if (strcmp(args[0], "resume") == 0)
2051 {
2052 detach_mode = GDB_DETACH_RESUME;
2053 return ERROR_OK;
2054 }
2055 else if (strcmp(args[0], "reset") == 0)
2056 {
2057 detach_mode = GDB_DETACH_RESET;
2058 return ERROR_OK;
2059 }
2060 else if (strcmp(args[0], "halt") == 0)
2061 {
2062 detach_mode = GDB_DETACH_HALT;
2063 return ERROR_OK;
2064 }
2065 else if (strcmp(args[0], "nothing") == 0)
2066 {
2067 detach_mode = GDB_DETACH_NOTHING;
2068 return ERROR_OK;
2069 }
2070 }
2071
2072 LOG_WARNING("invalid gdb_detach configuration directive: %s", args[0]);
2073 return ERROR_OK;
2074 }
2075
2076 int handle_gdb_memory_map_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2077 {
2078 if (argc == 1)
2079 {
2080 if (strcmp(args[0], "enable") == 0)
2081 {
2082 gdb_use_memory_map = 1;
2083 return ERROR_OK;
2084 }
2085 else if (strcmp(args[0], "disable") == 0)
2086 {
2087 gdb_use_memory_map = 0;
2088 return ERROR_OK;
2089 }
2090 }
2091
2092 LOG_WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);
2093 return ERROR_OK;
2094 }
2095
2096 int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2097 {
2098 if (argc == 1)
2099 {
2100 if (strcmp(args[0], "enable") == 0)
2101 {
2102 gdb_flash_program = 1;
2103 return ERROR_OK;
2104 }
2105 else if (strcmp(args[0], "disable") == 0)
2106 {
2107 gdb_flash_program = 0;
2108 return ERROR_OK;
2109 }
2110 }
2111
2112 LOG_WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);
2113 return ERROR_OK;
2114 }
2115
2116 int handle_gdb_report_data_abort_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2117 {
2118 if (argc == 1)
2119 {
2120 if (strcmp(args[0], "enable") == 0)
2121 {
2122 gdb_report_data_abort = 1;
2123 return ERROR_OK;
2124 }
2125 else if (strcmp(args[0], "disable") == 0)
2126 {
2127 gdb_report_data_abort = 0;
2128 return ERROR_OK;
2129 }
2130 }
2131
2132 LOG_WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]);
2133 return ERROR_OK;
2134 }
2135
2136 int gdb_register_commands(command_context_t *command_context)
2137 {
2138 register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
2139 COMMAND_CONFIG, "");
2140 register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,
2141 COMMAND_CONFIG, "");
2142 register_command(command_context, NULL, "gdb_memory_map", handle_gdb_memory_map_command,
2143 COMMAND_CONFIG, "");
2144 register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,
2145 COMMAND_CONFIG, "");
2146 register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command,
2147 COMMAND_CONFIG, "");
2148 return ERROR_OK;
2149 }
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