1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007-2010 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * Copyright (C) 2011 by Broadcom Corporation *
12 * Evan Hunter - ehunter@broadcom.com *
14 * Copyright (C) ST-Ericsson SA 2011 *
15 * michel.jaouen@stericsson.com : smp minimum support *
17 * Copyright (C) 2013 Andes Technology *
18 * Hsiangkai Wang <hkwang@andestech.com> *
20 * Copyright (C) 2013 Franck Jullien *
21 * elec4fun@gmail.com *
23 * This program is free software; you can redistribute it and/or modify *
24 * it under the terms of the GNU General Public License as published by *
25 * the Free Software Foundation; either version 2 of the License, or *
26 * (at your option) any later version. *
28 * This program is distributed in the hope that it will be useful, *
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
31 * GNU General Public License for more details. *
33 * You should have received a copy of the GNU General Public License *
34 * along with this program; if not, write to the *
35 * Free Software Foundation, Inc., *
36 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
37 ***************************************************************************/
43 #include <target/breakpoints.h>
44 #include <target/target_request.h>
45 #include <target/register.h>
47 #include <flash/nor/core.h>
48 #include "gdb_server.h"
49 #include <target/image.h>
50 #include <jtag/jtag.h>
51 #include "rtos/rtos.h"
52 #include "target/smp.h"
56 * GDB server implementation.
58 * This implements the GDB Remote Serial Protocol, over TCP connections,
59 * giving GDB access to the JTAG or other hardware debugging facilities
60 * found in most modern embedded processors.
63 struct target_desc_format {
65 uint32_t tdesc_length;
68 /* private connection data for GDB */
69 struct gdb_connection {
70 char buffer[GDB_BUFFER_SIZE];
74 enum target_state frontend_state;
75 struct image *vflash_image;
79 /* set flag to true if you want the next stepi to return immediately.
80 * allowing GDB to pick up a fresh set of register values from the target
81 * without modifying the target state. */
83 /* We delay reporting memory write errors until next step/continue or memory
84 * write. This improves performance of gdb load significantly as the GDB packet
85 * can be replied immediately and a new GDB packet will be ready without delay
86 * (ca. 10% or so...). */
88 /* with extended-remote it seems we need to better emulate attach/detach.
89 * what this means is we reply with a W stop reply after a kill packet,
90 * normally we reply with a S reply via gdb_last_signal_packet.
91 * as a side note this behaviour only effects gdb > 6.8 */
93 /* temporarily used for target description support */
94 struct target_desc_format target_desc;
98 #define _DEBUG_GDB_IO_
101 static struct gdb_connection *current_gdb_connection;
103 static int gdb_breakpoint_override;
104 static enum breakpoint_type gdb_breakpoint_override_type;
106 static int gdb_error(struct connection *connection, int retval);
107 static const char *gdb_port;
108 static const char *gdb_port_next;
110 static void gdb_log_callback(void *priv, const char *file, unsigned line,
111 const char *function, const char *string);
113 /* number of gdb connections, mainly to suppress gdb related debugging spam
114 * in helper/log.c when no gdb connections are actually active */
115 int gdb_actual_connections;
117 /* set if we are sending a memory map to gdb
118 * via qXfer:memory-map:read packet */
119 /* enabled by default*/
120 static int gdb_use_memory_map = 1;
121 /* enabled by default*/
122 static int gdb_flash_program = 1;
124 /* if set, data aborts cause an error to be reported in memory read packets
125 * see the code in gdb_read_memory_packet() for further explanations.
126 * Disabled by default.
128 static int gdb_report_data_abort;
130 /* set if we are sending target descriptions to gdb
131 * via qXfer:features:read packet */
132 /* enabled by default */
133 static int gdb_use_target_description = 1;
135 /* current processing free-run type, used by file-I/O */
136 static char gdb_running_type;
138 static int gdb_last_signal(struct target *target)
140 switch (target->debug_reason) {
141 case DBG_REASON_DBGRQ:
142 return 0x2; /* SIGINT */
143 case DBG_REASON_BREAKPOINT:
144 case DBG_REASON_WATCHPOINT:
145 case DBG_REASON_WPTANDBKPT:
146 return 0x05; /* SIGTRAP */
147 case DBG_REASON_SINGLESTEP:
148 return 0x05; /* SIGTRAP */
149 case DBG_REASON_NOTHALTED:
150 return 0x0; /* no signal... shouldn't happen */
152 LOG_USER("undefined debug reason %d - target needs reset",
153 target->debug_reason);
158 static int check_pending(struct connection *connection,
159 int timeout_s, int *got_data)
161 /* a non-blocking socket will block if there is 0 bytes available on the socket,
162 * but return with as many bytes as are available immediately
166 struct gdb_connection *gdb_con = connection->priv;
168 if (got_data == NULL)
172 if (gdb_con->buf_cnt > 0) {
178 FD_SET(connection->fd, &read_fds);
180 tv.tv_sec = timeout_s;
182 if (socket_select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0) {
183 /* This can typically be because a "monitor" command took too long
184 * before printing any progress messages
187 return ERROR_GDB_TIMEOUT;
191 *got_data = FD_ISSET(connection->fd, &read_fds) != 0;
195 static int gdb_get_char_inner(struct connection *connection, int *next_char)
197 struct gdb_connection *gdb_con = connection->priv;
198 int retval = ERROR_OK;
200 #ifdef _DEBUG_GDB_IO_
204 if (connection->service->type != CONNECTION_TCP)
205 gdb_con->buf_cnt = read(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
207 retval = check_pending(connection, 1, NULL);
208 if (retval != ERROR_OK)
210 gdb_con->buf_cnt = read_socket(connection->fd,
215 if (gdb_con->buf_cnt > 0)
217 if (gdb_con->buf_cnt == 0) {
219 return ERROR_SERVER_REMOTE_CLOSED;
223 errno = WSAGetLastError();
229 case WSAECONNABORTED:
231 return ERROR_SERVER_REMOTE_CLOSED;
234 return ERROR_SERVER_REMOTE_CLOSED;
236 LOG_ERROR("read: %d", errno);
246 return ERROR_SERVER_REMOTE_CLOSED;
249 return ERROR_SERVER_REMOTE_CLOSED;
251 LOG_ERROR("read: %s", strerror(errno));
253 return ERROR_SERVER_REMOTE_CLOSED;
258 #ifdef _DEBUG_GDB_IO_
259 debug_buffer = strndup(gdb_con->buffer, gdb_con->buf_cnt);
260 LOG_DEBUG("received '%s'", debug_buffer);
264 gdb_con->buf_p = gdb_con->buffer;
266 *next_char = *(gdb_con->buf_p++);
267 if (gdb_con->buf_cnt > 0)
268 connection->input_pending = 1;
270 connection->input_pending = 0;
271 #ifdef _DEBUG_GDB_IO_
272 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
279 * The cool thing about this fn is that it allows buf_p and buf_cnt to be
280 * held in registers in the inner loop.
282 * For small caches and embedded systems this is important!
284 static inline int gdb_get_char_fast(struct connection *connection,
285 int *next_char, char **buf_p, int *buf_cnt)
287 int retval = ERROR_OK;
289 if ((*buf_cnt)-- > 0) {
290 *next_char = **buf_p;
293 connection->input_pending = 1;
295 connection->input_pending = 0;
297 #ifdef _DEBUG_GDB_IO_
298 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
304 struct gdb_connection *gdb_con = connection->priv;
305 gdb_con->buf_p = *buf_p;
306 gdb_con->buf_cnt = *buf_cnt;
307 retval = gdb_get_char_inner(connection, next_char);
308 *buf_p = gdb_con->buf_p;
309 *buf_cnt = gdb_con->buf_cnt;
314 static int gdb_get_char(struct connection *connection, int *next_char)
316 struct gdb_connection *gdb_con = connection->priv;
317 return gdb_get_char_fast(connection, next_char, &gdb_con->buf_p, &gdb_con->buf_cnt);
320 static int gdb_putback_char(struct connection *connection, int last_char)
322 struct gdb_connection *gdb_con = connection->priv;
324 if (gdb_con->buf_p > gdb_con->buffer) {
325 *(--gdb_con->buf_p) = last_char;
328 LOG_ERROR("BUG: couldn't put character back");
333 /* The only way we can detect that the socket is closed is the first time
334 * we write to it, we will fail. Subsequent write operations will
335 * succeed. Shudder! */
336 static int gdb_write(struct connection *connection, void *data, int len)
338 struct gdb_connection *gdb_con = connection->priv;
340 return ERROR_SERVER_REMOTE_CLOSED;
342 if (connection_write(connection, data, len) == len)
345 return ERROR_SERVER_REMOTE_CLOSED;
348 static int gdb_put_packet_inner(struct connection *connection,
349 char *buffer, int len)
352 unsigned char my_checksum = 0;
353 #ifdef _DEBUG_GDB_IO_
358 struct gdb_connection *gdb_con = connection->priv;
360 for (i = 0; i < len; i++)
361 my_checksum += buffer[i];
363 #ifdef _DEBUG_GDB_IO_
365 * At this point we should have nothing in the input queue from GDB,
366 * however sometimes '-' is sent even though we've already received
367 * an ACK (+) for everything we've sent off.
371 retval = check_pending(connection, 0, &gotdata);
372 if (retval != ERROR_OK)
376 retval = gdb_get_char(connection, &reply);
377 if (retval != ERROR_OK)
380 /* fix a problem with some IAR tools */
381 gdb_putback_char(connection, reply);
382 LOG_DEBUG("Unexpected start of new packet");
386 LOG_WARNING("Discard unexpected char %c", reply);
391 #ifdef _DEBUG_GDB_IO_
392 debug_buffer = strndup(buffer, len);
393 LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
397 char local_buffer[1024];
398 local_buffer[0] = '$';
399 if ((size_t)len + 4 <= sizeof(local_buffer)) {
400 /* performance gain on smaller packets by only a single call to gdb_write() */
401 memcpy(local_buffer + 1, buffer, len++);
402 len += snprintf(local_buffer + len, sizeof(local_buffer) - len, "#%02x", my_checksum);
403 retval = gdb_write(connection, local_buffer, len);
404 if (retval != ERROR_OK)
407 /* larger packets are transmitted directly from caller supplied buffer
408 * by several calls to gdb_write() to avoid dynamic allocation */
409 snprintf(local_buffer + 1, sizeof(local_buffer) - 1, "#%02x", my_checksum);
410 retval = gdb_write(connection, local_buffer, 1);
411 if (retval != ERROR_OK)
413 retval = gdb_write(connection, buffer, len);
414 if (retval != ERROR_OK)
416 retval = gdb_write(connection, local_buffer + 1, 3);
417 if (retval != ERROR_OK)
421 if (gdb_con->noack_mode)
424 retval = gdb_get_char(connection, &reply);
425 if (retval != ERROR_OK)
430 else if (reply == '-') {
431 /* Stop sending output packets for now */
432 log_remove_callback(gdb_log_callback, connection);
433 LOG_WARNING("negative reply, retrying");
434 } else if (reply == 0x3) {
436 retval = gdb_get_char(connection, &reply);
437 if (retval != ERROR_OK)
441 else if (reply == '-') {
442 /* Stop sending output packets for now */
443 log_remove_callback(gdb_log_callback, connection);
444 LOG_WARNING("negative reply, retrying");
445 } else if (reply == '$') {
446 LOG_ERROR("GDB missing ack(1) - assumed good");
447 gdb_putback_char(connection, reply);
450 LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply);
452 return ERROR_SERVER_REMOTE_CLOSED;
454 } else if (reply == '$') {
455 LOG_ERROR("GDB missing ack(2) - assumed good");
456 gdb_putback_char(connection, reply);
459 LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection",
462 return ERROR_SERVER_REMOTE_CLOSED;
466 return ERROR_SERVER_REMOTE_CLOSED;
471 int gdb_put_packet(struct connection *connection, char *buffer, int len)
473 struct gdb_connection *gdb_con = connection->priv;
475 int retval = gdb_put_packet_inner(connection, buffer, len);
478 /* we sent some data, reset timer for keep alive messages */
484 static inline int fetch_packet(struct connection *connection,
485 int *checksum_ok, int noack, int *len, char *buffer)
487 unsigned char my_checksum = 0;
490 int retval = ERROR_OK;
492 struct gdb_connection *gdb_con = connection->priv;
497 /* move this over into local variables to use registers and give the
498 * more freedom to optimize */
499 char *buf_p = gdb_con->buf_p;
500 int buf_cnt = gdb_con->buf_cnt;
503 /* The common case is that we have an entire packet with no escape chars.
504 * We need to leave at least 2 bytes in the buffer to have
505 * gdb_get_char() update various bits and bobs correctly.
507 if ((buf_cnt > 2) && ((buf_cnt + count) < *len)) {
508 /* The compiler will struggle a bit with constant propagation and
509 * aliasing, so we help it by showing that these values do not
510 * change inside the loop
514 int run = buf_cnt - 2;
520 if (character == '#') {
521 /* Danger! character can be '#' when esc is
522 * used so we need an explicit boolean for done here. */
527 if (character == '}') {
528 /* data transmitted in binary mode (X packet)
529 * uses 0x7d as escape character */
530 my_checksum += character & 0xff;
533 my_checksum += character & 0xff;
534 buffer[count++] = (character ^ 0x20) & 0xff;
536 my_checksum += character & 0xff;
537 buffer[count++] = character & 0xff;
546 LOG_ERROR("packet buffer too small");
547 retval = ERROR_GDB_BUFFER_TOO_SMALL;
551 retval = gdb_get_char_fast(connection, &character, &buf_p, &buf_cnt);
552 if (retval != ERROR_OK)
555 if (character == '#')
558 if (character == '}') {
559 /* data transmitted in binary mode (X packet)
560 * uses 0x7d as escape character */
561 my_checksum += character & 0xff;
563 retval = gdb_get_char_fast(connection, &character, &buf_p, &buf_cnt);
564 if (retval != ERROR_OK)
567 my_checksum += character & 0xff;
568 buffer[count++] = (character ^ 0x20) & 0xff;
570 my_checksum += character & 0xff;
571 buffer[count++] = character & 0xff;
575 gdb_con->buf_p = buf_p;
576 gdb_con->buf_cnt = buf_cnt;
578 if (retval != ERROR_OK)
583 retval = gdb_get_char(connection, &character);
584 if (retval != ERROR_OK)
586 checksum[0] = character;
587 retval = gdb_get_char(connection, &character);
588 if (retval != ERROR_OK)
590 checksum[1] = character;
594 *checksum_ok = (my_checksum == strtoul(checksum, NULL, 16));
599 static int gdb_get_packet_inner(struct connection *connection,
600 char *buffer, int *len)
604 struct gdb_connection *gdb_con = connection->priv;
608 retval = gdb_get_char(connection, &character);
609 if (retval != ERROR_OK)
612 #ifdef _DEBUG_GDB_IO_
613 LOG_DEBUG("character: '%c'", character);
620 /* gdb sends a dummy ack '+' at every remote connect - see
621 * remote_start_remote (remote.c)
622 * in case anyone tries to debug why they receive this
623 * warning every time */
624 LOG_WARNING("acknowledgment received, but no packet pending");
627 LOG_WARNING("negative acknowledgment, but no packet pending");
634 LOG_WARNING("ignoring character 0x%x", character);
637 } while (character != '$');
640 /* explicit code expansion here to get faster inlined code in -O3 by not
641 * calculating checksum */
642 if (gdb_con->noack_mode) {
643 retval = fetch_packet(connection, &checksum_ok, 1, len, buffer);
644 if (retval != ERROR_OK)
647 retval = fetch_packet(connection, &checksum_ok, 0, len, buffer);
648 if (retval != ERROR_OK)
652 if (gdb_con->noack_mode) {
653 /* checksum is not checked in noack mode */
657 retval = gdb_write(connection, "+", 1);
658 if (retval != ERROR_OK)
664 return ERROR_SERVER_REMOTE_CLOSED;
669 static int gdb_get_packet(struct connection *connection, char *buffer, int *len)
671 struct gdb_connection *gdb_con = connection->priv;
673 int retval = gdb_get_packet_inner(connection, buffer, len);
678 static int gdb_output_con(struct connection *connection, const char *line)
683 bin_size = strlen(line);
685 hex_buffer = malloc(bin_size * 2 + 2);
686 if (hex_buffer == NULL)
687 return ERROR_GDB_BUFFER_TOO_SMALL;
690 int pkt_len = hexify(hex_buffer + 1, line, bin_size, bin_size * 2 + 1);
691 int retval = gdb_put_packet(connection, hex_buffer, pkt_len + 1);
697 static int gdb_output(struct command_context *context, const char *line)
699 /* this will be dumped to the log and also sent as an O packet if possible */
700 LOG_USER_N("%s", line);
704 static void gdb_signal_reply(struct target *target, struct connection *connection)
706 struct gdb_connection *gdb_connection = connection->priv;
708 char stop_reason[20];
712 if (target->debug_reason == DBG_REASON_EXIT) {
713 sig_reply_len = snprintf(sig_reply, sizeof(sig_reply), "W00");
715 if (gdb_connection->ctrl_c) {
717 gdb_connection->ctrl_c = 0;
719 signal_var = gdb_last_signal(target);
721 stop_reason[0] = '\0';
722 if (target->debug_reason == DBG_REASON_WATCHPOINT) {
723 enum watchpoint_rw hit_wp_type;
724 uint32_t hit_wp_address;
726 if (watchpoint_hit(target, &hit_wp_type, &hit_wp_address) == ERROR_OK) {
728 switch (hit_wp_type) {
730 snprintf(stop_reason, sizeof(stop_reason),
731 "watch:%08x;", hit_wp_address);
734 snprintf(stop_reason, sizeof(stop_reason),
735 "rwatch:%08x;", hit_wp_address);
738 snprintf(stop_reason, sizeof(stop_reason),
739 "awatch:%08x;", hit_wp_address);
747 sig_reply_len = snprintf(sig_reply, sizeof(sig_reply), "T%2.2x%s",
748 signal_var, stop_reason);
751 gdb_put_packet(connection, sig_reply, sig_reply_len);
752 gdb_connection->frontend_state = TARGET_HALTED;
753 rtos_update_threads(target);
756 static void gdb_fileio_reply(struct target *target, struct connection *connection)
758 struct gdb_connection *gdb_connection = connection->priv;
759 char fileio_command[256];
761 bool program_exited = false;
763 if (strcmp(target->fileio_info->identifier, "open") == 0)
764 sprintf(fileio_command, "F%s,%x/%x,%x,%x", target->fileio_info->identifier,
765 target->fileio_info->param_1,
766 target->fileio_info->param_2,
767 target->fileio_info->param_3,
768 target->fileio_info->param_4);
769 else if (strcmp(target->fileio_info->identifier, "close") == 0)
770 sprintf(fileio_command, "F%s,%x", target->fileio_info->identifier,
771 target->fileio_info->param_1);
772 else if (strcmp(target->fileio_info->identifier, "read") == 0)
773 sprintf(fileio_command, "F%s,%x,%x,%x", target->fileio_info->identifier,
774 target->fileio_info->param_1,
775 target->fileio_info->param_2,
776 target->fileio_info->param_3);
777 else if (strcmp(target->fileio_info->identifier, "write") == 0)
778 sprintf(fileio_command, "F%s,%x,%x,%x", target->fileio_info->identifier,
779 target->fileio_info->param_1,
780 target->fileio_info->param_2,
781 target->fileio_info->param_3);
782 else if (strcmp(target->fileio_info->identifier, "lseek") == 0)
783 sprintf(fileio_command, "F%s,%x,%x,%x", target->fileio_info->identifier,
784 target->fileio_info->param_1,
785 target->fileio_info->param_2,
786 target->fileio_info->param_3);
787 else if (strcmp(target->fileio_info->identifier, "rename") == 0)
788 sprintf(fileio_command, "F%s,%x/%x,%x/%x", target->fileio_info->identifier,
789 target->fileio_info->param_1,
790 target->fileio_info->param_2,
791 target->fileio_info->param_3,
792 target->fileio_info->param_4);
793 else if (strcmp(target->fileio_info->identifier, "unlink") == 0)
794 sprintf(fileio_command, "F%s,%x/%x", target->fileio_info->identifier,
795 target->fileio_info->param_1,
796 target->fileio_info->param_2);
797 else if (strcmp(target->fileio_info->identifier, "stat") == 0)
798 sprintf(fileio_command, "F%s,%x/%x,%x", target->fileio_info->identifier,
799 target->fileio_info->param_1,
800 target->fileio_info->param_2,
801 target->fileio_info->param_3);
802 else if (strcmp(target->fileio_info->identifier, "fstat") == 0)
803 sprintf(fileio_command, "F%s,%x,%x", target->fileio_info->identifier,
804 target->fileio_info->param_1,
805 target->fileio_info->param_2);
806 else if (strcmp(target->fileio_info->identifier, "gettimeofday") == 0)
807 sprintf(fileio_command, "F%s,%x,%x", target->fileio_info->identifier,
808 target->fileio_info->param_1,
809 target->fileio_info->param_2);
810 else if (strcmp(target->fileio_info->identifier, "isatty") == 0)
811 sprintf(fileio_command, "F%s,%x", target->fileio_info->identifier,
812 target->fileio_info->param_1);
813 else if (strcmp(target->fileio_info->identifier, "system") == 0)
814 sprintf(fileio_command, "F%s,%x/%x", target->fileio_info->identifier,
815 target->fileio_info->param_1,
816 target->fileio_info->param_2);
817 else if (strcmp(target->fileio_info->identifier, "exit") == 0) {
818 /* If target hits exit syscall, report to GDB the program is terminated.
819 * In addition, let target run its own exit syscall handler. */
820 program_exited = true;
821 sprintf(fileio_command, "W%02x", target->fileio_info->param_1);
823 LOG_DEBUG("Unknown syscall: %s", target->fileio_info->identifier);
825 /* encounter unknown syscall, continue */
826 gdb_connection->frontend_state = TARGET_RUNNING;
827 target_resume(target, 1, 0x0, 0, 0);
831 command_len = strlen(fileio_command);
832 gdb_put_packet(connection, fileio_command, command_len);
834 if (program_exited) {
835 /* Use target_resume() to let target run its own exit syscall handler. */
836 gdb_connection->frontend_state = TARGET_RUNNING;
837 target_resume(target, 1, 0x0, 0, 0);
839 gdb_connection->frontend_state = TARGET_HALTED;
840 rtos_update_threads(target);
844 static void gdb_frontend_halted(struct target *target, struct connection *connection)
846 struct gdb_connection *gdb_connection = connection->priv;
848 /* In the GDB protocol when we are stepping or continuing execution,
849 * we have a lingering reply. Upon receiving a halted event
850 * when we have that lingering packet, we reply to the original
851 * step or continue packet.
853 * Executing monitor commands can bring the target in and
854 * out of the running state so we'll see lots of TARGET_EVENT_XXX
855 * that are to be ignored.
857 if (gdb_connection->frontend_state == TARGET_RUNNING) {
858 /* stop forwarding log packets! */
859 log_remove_callback(gdb_log_callback, connection);
861 /* check fileio first */
862 if (target_get_gdb_fileio_info(target, target->fileio_info) == ERROR_OK)
863 gdb_fileio_reply(target, connection);
865 gdb_signal_reply(target, connection);
869 static int gdb_target_callback_event_handler(struct target *target,
870 enum target_event event, void *priv)
873 struct connection *connection = priv;
874 struct gdb_service *gdb_service = connection->service->priv;
876 if (gdb_service->target != target)
880 case TARGET_EVENT_GDB_HALT:
881 gdb_frontend_halted(target, connection);
883 case TARGET_EVENT_HALTED:
884 target_call_event_callbacks(target, TARGET_EVENT_GDB_END);
886 case TARGET_EVENT_GDB_FLASH_ERASE_START:
887 retval = jtag_execute_queue();
888 if (retval != ERROR_OK)
898 static int gdb_new_connection(struct connection *connection)
900 struct gdb_connection *gdb_connection = malloc(sizeof(struct gdb_connection));
901 struct gdb_service *gdb_service = connection->service->priv;
905 connection->priv = gdb_connection;
907 /* initialize gdb connection information */
908 gdb_connection->buf_p = gdb_connection->buffer;
909 gdb_connection->buf_cnt = 0;
910 gdb_connection->ctrl_c = 0;
911 gdb_connection->frontend_state = TARGET_HALTED;
912 gdb_connection->vflash_image = NULL;
913 gdb_connection->closed = 0;
914 gdb_connection->busy = 0;
915 gdb_connection->noack_mode = 0;
916 gdb_connection->sync = false;
917 gdb_connection->mem_write_error = false;
918 gdb_connection->attached = true;
919 gdb_connection->target_desc.tdesc = NULL;
920 gdb_connection->target_desc.tdesc_length = 0;
922 /* send ACK to GDB for debug request */
923 gdb_write(connection, "+", 1);
925 /* output goes through gdb connection */
926 command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
928 /* we must remove all breakpoints registered to the target as a previous
929 * GDB session could leave dangling breakpoints if e.g. communication
932 breakpoint_clear_target(gdb_service->target);
933 watchpoint_clear_target(gdb_service->target);
935 /* clean previous rtos session if supported*/
936 if ((gdb_service->target->rtos) && (gdb_service->target->rtos->type->clean))
937 gdb_service->target->rtos->type->clean(gdb_service->target);
939 /* remove the initial ACK from the incoming buffer */
940 retval = gdb_get_char(connection, &initial_ack);
941 if (retval != ERROR_OK)
944 /* FIX!!!??? would we actually ever receive a + here???
947 if (initial_ack != '+')
948 gdb_putback_char(connection, initial_ack);
949 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_ATTACH);
951 if (gdb_use_memory_map) {
952 /* Connect must fail if the memory map can't be set up correctly.
954 * This will cause an auto_probe to be invoked, which is either
955 * a no-op or it will fail when the target isn't ready(e.g. not halted).
958 for (i = 0; i < flash_get_bank_count(); i++) {
959 struct flash_bank *p;
960 retval = get_flash_bank_by_num(i, &p);
961 if (retval != ERROR_OK) {
962 LOG_ERROR("Connect failed. Consider setting up a gdb-attach event for the target " \
963 "to prepare target for GDB connect, or use 'gdb_memory_map disable'.");
969 gdb_actual_connections++;
970 LOG_DEBUG("New GDB Connection: %d, Target %s, state: %s",
971 gdb_actual_connections,
972 target_name(gdb_service->target),
973 target_state_name(gdb_service->target));
975 /* DANGER! If we fail subsequently, we must remove this handler,
976 * otherwise we occasionally see crashes as the timer can invoke the
979 * register callback to be informed about target events */
980 target_register_event_callback(gdb_target_callback_event_handler, connection);
985 static int gdb_connection_closed(struct connection *connection)
987 struct gdb_service *gdb_service = connection->service->priv;
988 struct gdb_connection *gdb_connection = connection->priv;
990 /* we're done forwarding messages. Tear down callback before
991 * cleaning up connection.
993 log_remove_callback(gdb_log_callback, connection);
995 gdb_actual_connections--;
996 LOG_DEBUG("GDB Close, Target: %s, state: %s, gdb_actual_connections=%d",
997 target_name(gdb_service->target),
998 target_state_name(gdb_service->target),
999 gdb_actual_connections);
1001 /* see if an image built with vFlash commands is left */
1002 if (gdb_connection->vflash_image) {
1003 image_close(gdb_connection->vflash_image);
1004 free(gdb_connection->vflash_image);
1005 gdb_connection->vflash_image = NULL;
1008 /* if this connection registered a debug-message receiver delete it */
1009 delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
1011 if (connection->priv) {
1012 free(connection->priv);
1013 connection->priv = NULL;
1015 LOG_ERROR("BUG: connection->priv == NULL");
1017 target_unregister_event_callback(gdb_target_callback_event_handler, connection);
1019 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_END);
1021 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_DETACH);
1026 static void gdb_send_error(struct connection *connection, uint8_t the_error)
1029 snprintf(err, 4, "E%2.2X", the_error);
1030 gdb_put_packet(connection, err, 3);
1033 static int gdb_last_signal_packet(struct connection *connection,
1034 char *packet, int packet_size)
1036 struct target *target = get_target_from_connection(connection);
1037 struct gdb_connection *gdb_con = connection->priv;
1041 if (!gdb_con->attached) {
1042 /* if we are here we have received a kill packet
1043 * reply W stop reply otherwise gdb gets very unhappy */
1044 gdb_put_packet(connection, "W00", 3);
1048 signal_var = gdb_last_signal(target);
1050 snprintf(sig_reply, 4, "S%2.2x", signal_var);
1051 gdb_put_packet(connection, sig_reply, 3);
1056 static inline int gdb_reg_pos(struct target *target, int pos, int len)
1058 if (target->endianness == TARGET_LITTLE_ENDIAN)
1061 return len - 1 - pos;
1064 /* Convert register to string of bytes. NB! The # of bits in the
1065 * register might be non-divisible by 8(a byte), in which
1066 * case an entire byte is shown.
1068 * NB! the format on the wire is the target endianness
1070 * The format of reg->value is little endian
1073 static void gdb_str_to_target(struct target *target,
1074 char *tstr, struct reg *reg)
1081 buf_len = DIV_ROUND_UP(reg->size, 8);
1083 for (i = 0; i < buf_len; i++) {
1084 int j = gdb_reg_pos(target, i, buf_len);
1085 tstr += sprintf(tstr, "%02x", buf[j]);
1089 /* copy over in register buffer */
1090 static void gdb_target_to_reg(struct target *target,
1091 char *tstr, int str_len, uint8_t *bin)
1094 LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
1099 for (i = 0; i < str_len; i += 2) {
1101 if (sscanf(tstr + i, "%02x", &t) != 1) {
1102 LOG_ERROR("BUG: unable to convert register value");
1106 int j = gdb_reg_pos(target, i/2, str_len/2);
1111 static int gdb_get_registers_packet(struct connection *connection,
1112 char *packet, int packet_size)
1114 struct target *target = get_target_from_connection(connection);
1115 struct reg **reg_list;
1118 int reg_packet_size = 0;
1123 #ifdef _DEBUG_GDB_IO_
1127 if ((target->rtos != NULL) && (ERROR_OK == rtos_get_gdb_reg_list(connection)))
1130 retval = target_get_gdb_reg_list(target, ®_list, ®_list_size,
1132 if (retval != ERROR_OK)
1133 return gdb_error(connection, retval);
1135 for (i = 0; i < reg_list_size; i++)
1136 reg_packet_size += DIV_ROUND_UP(reg_list[i]->size, 8) * 2;
1138 assert(reg_packet_size > 0);
1140 reg_packet = malloc(reg_packet_size + 1); /* plus one for string termination null */
1141 reg_packet_p = reg_packet;
1143 for (i = 0; i < reg_list_size; i++) {
1144 if (!reg_list[i]->valid)
1145 reg_list[i]->type->get(reg_list[i]);
1146 gdb_str_to_target(target, reg_packet_p, reg_list[i]);
1147 reg_packet_p += DIV_ROUND_UP(reg_list[i]->size, 8) * 2;
1150 #ifdef _DEBUG_GDB_IO_
1152 char *reg_packet_p_debug;
1153 reg_packet_p_debug = strndup(reg_packet, reg_packet_size);
1154 LOG_DEBUG("reg_packet: %s", reg_packet_p_debug);
1155 free(reg_packet_p_debug);
1159 gdb_put_packet(connection, reg_packet, reg_packet_size);
1167 static int gdb_set_registers_packet(struct connection *connection,
1168 char *packet, int packet_size)
1170 struct target *target = get_target_from_connection(connection);
1172 struct reg **reg_list;
1177 #ifdef _DEBUG_GDB_IO_
1181 /* skip command character */
1185 if (packet_size % 2) {
1186 LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection");
1187 return ERROR_SERVER_REMOTE_CLOSED;
1190 retval = target_get_gdb_reg_list(target, ®_list, ®_list_size,
1192 if (retval != ERROR_OK)
1193 return gdb_error(connection, retval);
1196 for (i = 0; i < reg_list_size; i++) {
1198 int chars = (DIV_ROUND_UP(reg_list[i]->size, 8) * 2);
1200 if (packet_p + chars > packet + packet_size)
1201 LOG_ERROR("BUG: register packet is too small for registers");
1203 bin_buf = malloc(DIV_ROUND_UP(reg_list[i]->size, 8));
1204 gdb_target_to_reg(target, packet_p, chars, bin_buf);
1206 reg_list[i]->type->set(reg_list[i], bin_buf);
1208 /* advance packet pointer */
1214 /* free struct reg *reg_list[] array allocated by get_gdb_reg_list */
1217 gdb_put_packet(connection, "OK", 2);
1222 static int gdb_get_register_packet(struct connection *connection,
1223 char *packet, int packet_size)
1225 struct target *target = get_target_from_connection(connection);
1227 int reg_num = strtoul(packet + 1, NULL, 16);
1228 struct reg **reg_list;
1232 #ifdef _DEBUG_GDB_IO_
1236 retval = target_get_gdb_reg_list(target, ®_list, ®_list_size,
1238 if (retval != ERROR_OK)
1239 return gdb_error(connection, retval);
1241 if (reg_list_size <= reg_num) {
1242 LOG_ERROR("gdb requested a non-existing register");
1243 return ERROR_SERVER_REMOTE_CLOSED;
1246 if (!reg_list[reg_num]->valid)
1247 reg_list[reg_num]->type->get(reg_list[reg_num]);
1249 reg_packet = malloc(DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2 + 1); /* plus one for string termination null */
1251 gdb_str_to_target(target, reg_packet, reg_list[reg_num]);
1253 gdb_put_packet(connection, reg_packet, DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2);
1261 static int gdb_set_register_packet(struct connection *connection,
1262 char *packet, int packet_size)
1264 struct target *target = get_target_from_connection(connection);
1267 int reg_num = strtoul(packet + 1, &separator, 16);
1268 struct reg **reg_list;
1274 retval = target_get_gdb_reg_list(target, ®_list, ®_list_size,
1276 if (retval != ERROR_OK)
1277 return gdb_error(connection, retval);
1279 if (reg_list_size <= reg_num) {
1280 LOG_ERROR("gdb requested a non-existing register");
1281 return ERROR_SERVER_REMOTE_CLOSED;
1284 if (*separator != '=') {
1285 LOG_ERROR("GDB 'set register packet', but no '=' following the register number");
1286 return ERROR_SERVER_REMOTE_CLOSED;
1289 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
1290 bin_buf = malloc(DIV_ROUND_UP(reg_list[reg_num]->size, 8));
1291 int chars = (DIV_ROUND_UP(reg_list[reg_num]->size, 8) * 2);
1293 if ((unsigned int)chars != strlen(separator + 1)) {
1294 LOG_ERROR("gdb sent a packet with wrong register size");
1296 return ERROR_SERVER_REMOTE_CLOSED;
1299 gdb_target_to_reg(target, separator + 1, chars, bin_buf);
1301 reg_list[reg_num]->type->set(reg_list[reg_num], bin_buf);
1303 gdb_put_packet(connection, "OK", 2);
1311 /* No attempt is made to translate the "retval" to
1312 * GDB speak. This has to be done at the calling
1313 * site as no mapping really exists.
1315 static int gdb_error(struct connection *connection, int retval)
1317 LOG_DEBUG("Reporting %i to GDB as generic error", retval);
1318 gdb_send_error(connection, EFAULT);
1322 /* We don't have to worry about the default 2 second timeout for GDB packets,
1323 * because GDB breaks up large memory reads into smaller reads.
1325 * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
1327 static int gdb_read_memory_packet(struct connection *connection,
1328 char *packet, int packet_size)
1330 struct target *target = get_target_from_connection(connection);
1338 int retval = ERROR_OK;
1340 /* skip command character */
1343 addr = strtoul(packet, &separator, 16);
1345 if (*separator != ',') {
1346 LOG_ERROR("incomplete read memory packet received, dropping connection");
1347 return ERROR_SERVER_REMOTE_CLOSED;
1350 len = strtoul(separator + 1, NULL, 16);
1352 buffer = malloc(len);
1354 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1356 retval = target_read_buffer(target, addr, len, buffer);
1358 if ((retval != ERROR_OK) && !gdb_report_data_abort) {
1359 /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
1360 * At some point this might be fixed in GDB, in which case this code can be removed.
1362 * OpenOCD developers are acutely aware of this problem, but there is nothing
1363 * gained by involving the user in this problem that hopefully will get resolved
1366 * http://sourceware.org/cgi-bin/gnatsweb.pl? \
1367 * cmd = view%20audit-trail&database = gdb&pr = 2395
1369 * For now, the default is to fix up things to make current GDB versions work.
1370 * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
1372 memset(buffer, 0, len);
1376 if (retval == ERROR_OK) {
1377 hex_buffer = malloc(len * 2 + 1);
1379 int pkt_len = hexify(hex_buffer, (char *)buffer, len, len * 2 + 1);
1381 gdb_put_packet(connection, hex_buffer, pkt_len);
1385 retval = gdb_error(connection, retval);
1392 static int gdb_write_memory_packet(struct connection *connection,
1393 char *packet, int packet_size)
1395 struct target *target = get_target_from_connection(connection);
1403 /* skip command character */
1406 addr = strtoul(packet, &separator, 16);
1408 if (*separator != ',') {
1409 LOG_ERROR("incomplete write memory packet received, dropping connection");
1410 return ERROR_SERVER_REMOTE_CLOSED;
1413 len = strtoul(separator + 1, &separator, 16);
1415 if (*(separator++) != ':') {
1416 LOG_ERROR("incomplete write memory packet received, dropping connection");
1417 return ERROR_SERVER_REMOTE_CLOSED;
1420 buffer = malloc(len);
1422 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1424 if (unhexify((char *)buffer, separator, len) != (int)len)
1425 LOG_ERROR("unable to decode memory packet");
1427 retval = target_write_buffer(target, addr, len, buffer);
1429 if (retval == ERROR_OK)
1430 gdb_put_packet(connection, "OK", 2);
1432 retval = gdb_error(connection, retval);
1439 static int gdb_write_memory_binary_packet(struct connection *connection,
1440 char *packet, int packet_size)
1442 struct target *target = get_target_from_connection(connection);
1447 int retval = ERROR_OK;
1449 /* skip command character */
1452 addr = strtoul(packet, &separator, 16);
1454 if (*separator != ',') {
1455 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1456 return ERROR_SERVER_REMOTE_CLOSED;
1459 len = strtoul(separator + 1, &separator, 16);
1461 if (*(separator++) != ':') {
1462 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1463 return ERROR_SERVER_REMOTE_CLOSED;
1466 struct gdb_connection *gdb_connection = connection->priv;
1468 if (gdb_connection->mem_write_error) {
1469 retval = ERROR_FAIL;
1470 /* now that we have reported the memory write error, we can clear the condition */
1471 gdb_connection->mem_write_error = false;
1474 /* By replying the packet *immediately* GDB will send us a new packet
1475 * while we write the last one to the target.
1477 if (retval == ERROR_OK)
1478 gdb_put_packet(connection, "OK", 2);
1480 retval = gdb_error(connection, retval);
1481 if (retval != ERROR_OK)
1486 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1488 retval = target_write_buffer(target, addr, len, (uint8_t *)separator);
1489 if (retval != ERROR_OK)
1490 gdb_connection->mem_write_error = true;
1496 static int gdb_step_continue_packet(struct connection *connection,
1497 char *packet, int packet_size)
1499 struct target *target = get_target_from_connection(connection);
1501 uint32_t address = 0x0;
1502 int retval = ERROR_OK;
1506 if (packet_size > 1) {
1507 packet[packet_size] = 0;
1508 address = strtoul(packet + 1, NULL, 16);
1512 gdb_running_type = packet[0];
1513 if (packet[0] == 'c') {
1514 LOG_DEBUG("continue");
1515 /* resume at current address, don't handle breakpoints, not debugging */
1516 retval = target_resume(target, current, address, 0, 0);
1517 } else if (packet[0] == 's') {
1519 /* step at current or address, don't handle breakpoints */
1520 retval = target_step(target, current, address, 0);
1525 static int gdb_breakpoint_watchpoint_packet(struct connection *connection,
1526 char *packet, int packet_size)
1528 struct target *target = get_target_from_connection(connection);
1530 enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
1531 enum watchpoint_rw wp_type = WPT_READ /* dummy init to avoid warning */;
1539 type = strtoul(packet + 1, &separator, 16);
1541 if (type == 0) /* memory breakpoint */
1542 bp_type = BKPT_SOFT;
1543 else if (type == 1) /* hardware breakpoint */
1544 bp_type = BKPT_HARD;
1545 else if (type == 2) /* write watchpoint */
1546 wp_type = WPT_WRITE;
1547 else if (type == 3) /* read watchpoint */
1549 else if (type == 4) /* access watchpoint */
1550 wp_type = WPT_ACCESS;
1552 LOG_ERROR("invalid gdb watch/breakpoint type(%d), dropping connection", type);
1553 return ERROR_SERVER_REMOTE_CLOSED;
1556 if (gdb_breakpoint_override && ((bp_type == BKPT_SOFT) || (bp_type == BKPT_HARD)))
1557 bp_type = gdb_breakpoint_override_type;
1559 if (*separator != ',') {
1560 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1561 return ERROR_SERVER_REMOTE_CLOSED;
1564 address = strtoul(separator + 1, &separator, 16);
1566 if (*separator != ',') {
1567 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1568 return ERROR_SERVER_REMOTE_CLOSED;
1571 size = strtoul(separator + 1, &separator, 16);
1576 if (packet[0] == 'Z') {
1577 retval = breakpoint_add(target, address, size, bp_type);
1578 if (retval != ERROR_OK) {
1579 retval = gdb_error(connection, retval);
1580 if (retval != ERROR_OK)
1583 gdb_put_packet(connection, "OK", 2);
1585 breakpoint_remove(target, address);
1586 gdb_put_packet(connection, "OK", 2);
1593 if (packet[0] == 'Z') {
1594 retval = watchpoint_add(target, address, size, wp_type, 0, 0xffffffffu);
1595 if (retval != ERROR_OK) {
1596 retval = gdb_error(connection, retval);
1597 if (retval != ERROR_OK)
1600 gdb_put_packet(connection, "OK", 2);
1602 watchpoint_remove(target, address);
1603 gdb_put_packet(connection, "OK", 2);
1614 /* print out a string and allocate more space as needed,
1615 * mainly used for XML at this point
1617 static void xml_printf(int *retval, char **xml, int *pos, int *size,
1618 const char *fmt, ...)
1620 if (*retval != ERROR_OK)
1625 if ((*xml == NULL) || (!first)) {
1626 /* start by 0 to exercise all the code paths.
1627 * Need minimum 2 bytes to fit 1 char and 0 terminator. */
1629 *size = *size * 2 + 2;
1631 *xml = realloc(*xml, *size);
1635 *retval = ERROR_SERVER_REMOTE_CLOSED;
1643 ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
1645 if ((ret > 0) && ((ret + 1) < *size - *pos)) {
1649 /* there was just enough or not enough space, allocate more. */
1654 static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len)
1658 /* Extract and NUL-terminate the annex. */
1660 while (*buf && *buf != ':')
1666 /* After the read marker and annex, qXfer looks like a
1667 * traditional 'm' packet. */
1669 *ofs = strtoul(buf, &separator, 16);
1671 if (*separator != ',')
1674 *len = strtoul(separator + 1, NULL, 16);
1679 static int compare_bank(const void *a, const void *b)
1681 struct flash_bank *b1, *b2;
1682 b1 = *((struct flash_bank **)a);
1683 b2 = *((struct flash_bank **)b);
1685 if (b1->base == b2->base)
1687 else if (b1->base > b2->base)
1693 static int gdb_memory_map(struct connection *connection,
1694 char *packet, int packet_size)
1696 /* We get away with only specifying flash here. Regions that are not
1697 * specified are treated as if we provided no memory map(if not we
1698 * could detect the holes and mark them as RAM).
1699 * Normally we only execute this code once, but no big deal if we
1700 * have to regenerate it a couple of times.
1703 struct target *target = get_target_from_connection(connection);
1704 struct flash_bank *p;
1708 int retval = ERROR_OK;
1709 struct flash_bank **banks;
1713 uint32_t ram_start = 0;
1715 int target_flash_banks = 0;
1717 /* skip command character */
1720 offset = strtoul(packet, &separator, 16);
1721 length = strtoul(separator + 1, &separator, 16);
1723 xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
1725 /* Sort banks in ascending order. We need to report non-flash
1726 * memory as ram (or rather read/write) by default for GDB, since
1727 * it has no concept of non-cacheable read/write memory (i/o etc).
1729 * FIXME Most non-flash addresses are *NOT* RAM! Don't lie.
1730 * Current versions of GDB assume unlisted addresses are RAM...
1732 banks = malloc(sizeof(struct flash_bank *)*flash_get_bank_count());
1734 for (i = 0; i < flash_get_bank_count(); i++) {
1735 retval = get_flash_bank_by_num(i, &p);
1736 if (retval != ERROR_OK) {
1738 gdb_error(connection, retval);
1741 if (p->target == target)
1742 banks[target_flash_banks++] = p;
1745 qsort(banks, target_flash_banks, sizeof(struct flash_bank *),
1748 for (i = 0; i < target_flash_banks; i++) {
1750 unsigned sector_size = 0;
1756 if (ram_start < p->base)
1757 xml_printf(&retval, &xml, &pos, &size,
1758 "<memory type=\"ram\" start=\"0x%x\" "
1759 "length=\"0x%x\"/>\n",
1760 ram_start, p->base - ram_start);
1762 /* Report adjacent groups of same-size sectors. So for
1763 * example top boot CFI flash will list an initial region
1764 * with several large sectors (maybe 128KB) and several
1765 * smaller ones at the end (maybe 32KB). STR7 will have
1766 * regions with 8KB, 32KB, and 64KB sectors; etc.
1768 for (j = 0; j < p->num_sectors; j++) {
1771 /* Maybe start a new group of sectors. */
1772 if (sector_size == 0) {
1773 start = p->base + p->sectors[j].offset;
1774 xml_printf(&retval, &xml, &pos, &size,
1775 "<memory type=\"flash\" "
1778 sector_size = p->sectors[j].size;
1781 /* Does this finish a group of sectors?
1782 * If not, continue an already-started group.
1784 if (j == p->num_sectors - 1)
1785 group_len = (p->base + p->size) - start;
1786 else if (p->sectors[j + 1].size != sector_size)
1787 group_len = p->base + p->sectors[j + 1].offset
1792 xml_printf(&retval, &xml, &pos, &size,
1793 "length=\"0x%x\">\n"
1794 "<property name=\"blocksize\">"
1802 ram_start = p->base + p->size;
1806 xml_printf(&retval, &xml, &pos, &size,
1807 "<memory type=\"ram\" start=\"0x%x\" "
1808 "length=\"0x%x\"/>\n",
1809 ram_start, 0-ram_start);
1810 /* ELSE a flash chip could be at the very end of the 32 bit address
1811 * space, in which case ram_start will be precisely 0
1817 xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
1819 if (retval != ERROR_OK) {
1820 gdb_error(connection, retval);
1824 if (offset + length > pos)
1825 length = pos - offset;
1827 char *t = malloc(length + 1);
1829 memcpy(t + 1, xml + offset, length);
1830 gdb_put_packet(connection, t, length + 1);
1837 static const char *gdb_get_reg_type_name(enum reg_type type)
1844 case REG_TYPE_INT16:
1846 case REG_TYPE_INT32:
1848 case REG_TYPE_INT64:
1850 case REG_TYPE_INT128:
1852 case REG_TYPE_UINT8:
1854 case REG_TYPE_UINT16:
1856 case REG_TYPE_UINT32:
1858 case REG_TYPE_UINT64:
1860 case REG_TYPE_UINT128:
1862 case REG_TYPE_CODE_PTR:
1864 case REG_TYPE_DATA_PTR:
1866 case REG_TYPE_FLOAT:
1868 case REG_TYPE_IEEE_SINGLE:
1869 return "ieee_single";
1870 case REG_TYPE_IEEE_DOUBLE:
1871 return "ieee_double";
1872 case REG_TYPE_ARCH_DEFINED:
1873 return "int"; /* return arbitrary string to avoid compile warning. */
1876 return "int"; /* "int" as default value */
1879 static int gdb_generate_reg_type_description(struct target *target,
1880 char **tdesc, int *pos, int *size, struct reg_data_type *type)
1882 int retval = ERROR_OK;
1884 if (type->type_class == REG_TYPE_CLASS_VECTOR) {
1885 /* <vector id="id" type="type" count="count"/> */
1886 xml_printf(&retval, tdesc, pos, size,
1887 "<vector id=\"%s\" type=\"%s\" count=\"%d\"/>\n",
1888 type->id, type->reg_type_vector->type->id,
1889 type->reg_type_vector->count);
1891 } else if (type->type_class == REG_TYPE_CLASS_UNION) {
1893 * <field name="name" type="type"/> ...
1895 xml_printf(&retval, tdesc, pos, size,
1896 "<union id=\"%s\">\n",
1899 struct reg_data_type_union_field *field;
1900 field = type->reg_type_union->fields;
1901 while (field != NULL) {
1902 xml_printf(&retval, tdesc, pos, size,
1903 "<field name=\"%s\" type=\"%s\"/>\n",
1904 field->name, field->type->id);
1906 field = field->next;
1909 xml_printf(&retval, tdesc, pos, size,
1912 } else if (type->type_class == REG_TYPE_CLASS_STRUCT) {
1913 struct reg_data_type_struct_field *field;
1914 field = type->reg_type_struct->fields;
1916 if (field->use_bitfields) {
1917 /* <struct id="id" size="size">
1918 * <field name="name" start="start" end="end"/> ...
1920 xml_printf(&retval, tdesc, pos, size,
1921 "<struct id=\"%s\" size=\"%d\">\n",
1922 type->id, type->reg_type_struct->size);
1923 while (field != NULL) {
1924 xml_printf(&retval, tdesc, pos, size,
1925 "<field name=\"%s\" start=\"%d\" end=\"%d\"/>\n",
1926 field->name, field->bitfield->start,
1927 field->bitfield->end);
1929 field = field->next;
1933 * <field name="name" type="type"/> ...
1935 xml_printf(&retval, tdesc, pos, size,
1936 "<struct id=\"%s\">\n",
1938 while (field != NULL) {
1939 xml_printf(&retval, tdesc, pos, size,
1940 "<field name=\"%s\" type=\"%s\"/>\n",
1941 field->name, field->type->id);
1943 field = field->next;
1947 xml_printf(&retval, tdesc, pos, size,
1950 } else if (type->type_class == REG_TYPE_CLASS_FLAGS) {
1951 /* <flags id="id" size="size">
1952 * <field name="name" start="start" end="end"/> ...
1954 xml_printf(&retval, tdesc, pos, size,
1955 "<flags id=\"%s\" size=\"%d\">\n",
1956 type->id, type->reg_type_flags->size);
1958 struct reg_data_type_flags_field *field;
1959 field = type->reg_type_flags->fields;
1960 while (field != NULL) {
1961 xml_printf(&retval, tdesc, pos, size,
1962 "<field name=\"%s\" start=\"%d\" end=\"%d\"/>\n",
1963 field->name, field->bitfield->start, field->bitfield->end);
1965 field = field->next;
1968 xml_printf(&retval, tdesc, pos, size,
1976 /* Get a list of available target registers features. feature_list must
1977 * be freed by caller.
1979 static int get_reg_features_list(struct target *target, char **feature_list[], int *feature_list_size,
1980 struct reg **reg_list, int reg_list_size)
1984 /* Start with only one element */
1985 *feature_list = calloc(1, sizeof(char *));
1987 for (int i = 0; i < reg_list_size; i++) {
1988 if (reg_list[i]->exist == false)
1991 if ((reg_list[i]->feature->name != NULL)
1992 && (strcmp(reg_list[i]->feature->name, ""))) {
1993 /* We found a feature, check if the feature is already in the
1994 * table. If not, allocate a new entry for the table and
1995 * put the new feature in it.
1997 for (int j = 0; j < (tbl_sz + 1); j++) {
1998 if (!((*feature_list)[j])) {
1999 (*feature_list)[tbl_sz++] = strdup(reg_list[i]->feature->name);
2000 *feature_list = realloc(*feature_list, sizeof(char *) * (tbl_sz + 1));
2001 (*feature_list)[tbl_sz] = NULL;
2004 if (!strcmp((*feature_list)[j], reg_list[i]->feature->name))
2011 if (feature_list_size)
2012 *feature_list_size = tbl_sz;
2017 static int gdb_generate_target_description(struct target *target, char **tdesc)
2019 int retval = ERROR_OK;
2020 struct reg **reg_list;
2025 xml_printf(&retval, tdesc, &pos, &size,
2026 "<?xml version=\"1.0\"?>\n"
2027 "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">\n"
2028 "<target version=\"1.0\">\n");
2030 retval = target_get_gdb_reg_list(target, ®_list,
2031 ®_list_size, REG_CLASS_ALL);
2033 if (retval != ERROR_OK) {
2034 LOG_ERROR("get register list failed");
2038 if (reg_list_size <= 0)
2041 char **features = NULL;
2042 /* Get a list of available target registers features */
2043 retval = get_reg_features_list(target, &features, NULL, reg_list, reg_list_size);
2044 if (retval != ERROR_OK) {
2045 LOG_ERROR("Can't get the registers feature list");
2049 /* If we found some features associated with registers, create sections */
2050 int current_feature = 0;
2052 /* generate target description according to register list */
2053 if (features != NULL) {
2054 while (features[current_feature]) {
2056 xml_printf(&retval, tdesc, &pos, &size,
2057 "<feature name=\"%s\">\n",
2058 features[current_feature]);
2061 for (i = 0; i < reg_list_size; i++) {
2063 if (reg_list[i]->exist == false)
2066 if (strcmp(reg_list[i]->feature->name, features[current_feature]))
2069 const char *type_str;
2070 if (reg_list[i]->reg_data_type != NULL) {
2071 if (reg_list[i]->reg_data_type->type == REG_TYPE_ARCH_DEFINED) {
2072 /* generate <type... first, if there are architecture-defined types. */
2073 gdb_generate_reg_type_description(target, tdesc, &pos, &size,
2074 reg_list[i]->reg_data_type);
2076 type_str = reg_list[i]->reg_data_type->id;
2078 /* predefined type */
2079 type_str = gdb_get_reg_type_name(
2080 reg_list[i]->reg_data_type->type);
2083 /* Default type is "int" */
2087 xml_printf(&retval, tdesc, &pos, &size,
2088 "<reg name=\"%s\"", reg_list[i]->name);
2089 xml_printf(&retval, tdesc, &pos, &size,
2090 " bitsize=\"%d\"", reg_list[i]->size);
2091 xml_printf(&retval, tdesc, &pos, &size,
2092 " regnum=\"%d\"", reg_list[i]->number);
2093 if (reg_list[i]->caller_save)
2094 xml_printf(&retval, tdesc, &pos, &size,
2095 " save-restore=\"yes\"");
2097 xml_printf(&retval, tdesc, &pos, &size,
2098 " save-restore=\"no\"");
2100 xml_printf(&retval, tdesc, &pos, &size,
2101 " type=\"%s\"", type_str);
2103 if (reg_list[i]->group != NULL)
2104 xml_printf(&retval, tdesc, &pos, &size,
2105 " group=\"%s\"", reg_list[i]->group);
2107 xml_printf(&retval, tdesc, &pos, &size,
2111 xml_printf(&retval, tdesc, &pos, &size,
2118 xml_printf(&retval, tdesc, &pos, &size,
2121 if (reg_list != NULL)
2124 if (features != NULL)
2130 static int gdb_get_target_description_chunk(struct target *target, struct target_desc_format *target_desc,
2131 char **chunk, int32_t offset, uint32_t length)
2133 if (target_desc == NULL) {
2134 LOG_ERROR("Unable to Generate Target Description");
2138 char *tdesc = target_desc->tdesc;
2139 uint32_t tdesc_length = target_desc->tdesc_length;
2141 if (tdesc == NULL) {
2142 int retval = gdb_generate_target_description(target, &tdesc);
2143 if (retval != ERROR_OK) {
2144 LOG_ERROR("Unable to Generate Target Description");
2148 tdesc_length = strlen(tdesc);
2153 if (length < (tdesc_length - offset))
2154 transfer_type = 'm';
2156 transfer_type = 'l';
2158 *chunk = malloc(length + 2);
2159 if (*chunk == NULL) {
2160 LOG_ERROR("Unable to allocate memory");
2164 (*chunk)[0] = transfer_type;
2165 if (transfer_type == 'm') {
2166 strncpy((*chunk) + 1, tdesc + offset, length);
2167 (*chunk)[1 + length] = '\0';
2169 strncpy((*chunk) + 1, tdesc + offset, tdesc_length - offset);
2170 (*chunk)[1 + (tdesc_length - offset)] = '\0';
2172 /* After gdb-server sends out last chunk, invalidate tdesc. */
2178 target_desc->tdesc = tdesc;
2179 target_desc->tdesc_length = tdesc_length;
2184 static int gdb_target_description_supported(struct target *target, int *supported)
2186 int retval = ERROR_OK;
2187 struct reg **reg_list = NULL;
2188 int reg_list_size = 0;
2189 int feature_list_size = 0;
2191 retval = target_get_gdb_reg_list(target, ®_list,
2192 ®_list_size, REG_CLASS_ALL);
2193 if (retval != ERROR_OK) {
2194 LOG_ERROR("get register list failed");
2198 if (reg_list_size <= 0) {
2199 retval = ERROR_FAIL;
2203 char **features = NULL;
2204 /* Get a list of available target registers features */
2205 retval = get_reg_features_list(target, &features, &feature_list_size, reg_list, reg_list_size);
2206 if (retval != ERROR_OK) {
2207 LOG_ERROR("Can't get the registers feature list");
2212 if (feature_list_size)
2219 if (reg_list != NULL)
2222 if (features != NULL)
2228 static int gdb_query_packet(struct connection *connection,
2229 char *packet, int packet_size)
2231 struct command_context *cmd_ctx = connection->cmd_ctx;
2232 struct gdb_connection *gdb_connection = connection->priv;
2233 struct target *target = get_target_from_connection(connection);
2235 if (strncmp(packet, "qRcmd,", 6) == 0) {
2236 if (packet_size > 6) {
2238 cmd = malloc((packet_size - 6) / 2 + 1);
2239 int len = unhexify(cmd, packet + 6, (packet_size - 6) / 2);
2242 /* We want to print all debug output to GDB connection */
2243 log_add_callback(gdb_log_callback, connection);
2244 target_call_timer_callbacks_now();
2245 /* some commands need to know the GDB connection, make note of current
2246 * GDB connection. */
2247 current_gdb_connection = gdb_connection;
2248 command_run_line(cmd_ctx, cmd);
2249 current_gdb_connection = NULL;
2250 target_call_timer_callbacks_now();
2251 log_remove_callback(gdb_log_callback, connection);
2254 gdb_put_packet(connection, "OK", 2);
2256 } else if (strncmp(packet, "qCRC:", 5) == 0) {
2257 if (packet_size > 5) {
2265 /* skip command character */
2268 addr = strtoul(packet, &separator, 16);
2270 if (*separator != ',') {
2271 LOG_ERROR("incomplete read memory packet received, dropping connection");
2272 return ERROR_SERVER_REMOTE_CLOSED;
2275 len = strtoul(separator + 1, NULL, 16);
2277 retval = target_checksum_memory(target, addr, len, &checksum);
2279 if (retval == ERROR_OK) {
2280 snprintf(gdb_reply, 10, "C%8.8" PRIx32 "", checksum);
2281 gdb_put_packet(connection, gdb_reply, 9);
2283 retval = gdb_error(connection, retval);
2284 if (retval != ERROR_OK)
2290 } else if (strncmp(packet, "qSupported", 10) == 0) {
2291 /* we currently support packet size and qXfer:memory-map:read (if enabled)
2292 * qXfer:features:read is supported for some targets */
2293 int retval = ERROR_OK;
2294 char *buffer = NULL;
2297 int gdb_target_desc_supported = 0;
2299 /* we need to test that the target supports target descriptions */
2300 retval = gdb_target_description_supported(target, &gdb_target_desc_supported);
2301 if (retval != ERROR_OK) {
2302 LOG_INFO("Failed detecting Target Description Support, disabling");
2303 gdb_target_desc_supported = 0;
2306 /* support may be disabled globally */
2307 if (gdb_use_target_description == 0) {
2308 if (gdb_target_desc_supported)
2309 LOG_WARNING("Target Descriptions Supported, but disabled");
2310 gdb_target_desc_supported = 0;
2317 "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read%c;QStartNoAckMode+",
2318 (GDB_BUFFER_SIZE - 1),
2319 ((gdb_use_memory_map == 1) && (flash_get_bank_count() > 0)) ? '+' : '-',
2320 (gdb_target_desc_supported == 1) ? '+' : '-');
2322 if (retval != ERROR_OK) {
2323 gdb_send_error(connection, 01);
2327 gdb_put_packet(connection, buffer, strlen(buffer));
2331 } else if ((strncmp(packet, "qXfer:memory-map:read::", 23) == 0)
2332 && (flash_get_bank_count() > 0))
2333 return gdb_memory_map(connection, packet, packet_size);
2334 else if (strncmp(packet, "qXfer:features:read:", 20) == 0) {
2336 int retval = ERROR_OK;
2339 unsigned int length;
2342 /* skip command character */
2345 if (decode_xfer_read(packet, &annex, &offset, &length) < 0) {
2346 gdb_send_error(connection, 01);
2350 /* Target should prepare correct target description for annex.
2351 * The first character of returned xml is 'm' or 'l'. 'm' for
2352 * there are *more* chunks to transfer. 'l' for it is the *last*
2353 * chunk of target description.
2355 retval = gdb_get_target_description_chunk(target, &gdb_connection->target_desc,
2356 &xml, offset, length);
2357 if (retval != ERROR_OK) {
2358 gdb_error(connection, retval);
2362 gdb_put_packet(connection, xml, strlen(xml));
2366 } else if (strncmp(packet, "QStartNoAckMode", 15) == 0) {
2367 gdb_connection->noack_mode = 1;
2368 gdb_put_packet(connection, "OK", 2);
2372 gdb_put_packet(connection, "", 0);
2376 static int gdb_v_packet(struct connection *connection,
2377 char *packet, int packet_size)
2379 struct gdb_connection *gdb_connection = connection->priv;
2380 struct gdb_service *gdb_service = connection->service->priv;
2383 /* if flash programming disabled - send a empty reply */
2385 if (gdb_flash_program == 0) {
2386 gdb_put_packet(connection, "", 0);
2390 if (strncmp(packet, "vFlashErase:", 12) == 0) {
2392 unsigned long length;
2394 char *parse = packet + 12;
2395 if (*parse == '\0') {
2396 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2397 return ERROR_SERVER_REMOTE_CLOSED;
2400 addr = strtoul(parse, &parse, 16);
2402 if (*(parse++) != ',' || *parse == '\0') {
2403 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2404 return ERROR_SERVER_REMOTE_CLOSED;
2407 length = strtoul(parse, &parse, 16);
2409 if (*parse != '\0') {
2410 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2411 return ERROR_SERVER_REMOTE_CLOSED;
2414 /* assume all sectors need erasing - stops any problems
2415 * when flash_write is called multiple times */
2418 /* perform any target specific operations before the erase */
2419 target_call_event_callbacks(gdb_service->target,
2420 TARGET_EVENT_GDB_FLASH_ERASE_START);
2422 /* vFlashErase:addr,length messages require region start and
2423 * end to be "block" aligned ... if padding is ever needed,
2424 * GDB will have become dangerously confused.
2426 result = flash_erase_address_range(gdb_service->target,
2427 false, addr, length);
2429 /* perform any target specific operations after the erase */
2430 target_call_event_callbacks(gdb_service->target,
2431 TARGET_EVENT_GDB_FLASH_ERASE_END);
2434 if (result != ERROR_OK) {
2435 /* GDB doesn't evaluate the actual error number returned,
2436 * treat a failed erase as an I/O error
2438 gdb_send_error(connection, EIO);
2439 LOG_ERROR("flash_erase returned %i", result);
2441 gdb_put_packet(connection, "OK", 2);
2446 if (strncmp(packet, "vFlashWrite:", 12) == 0) {
2449 unsigned long length;
2450 char *parse = packet + 12;
2452 if (*parse == '\0') {
2453 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2454 return ERROR_SERVER_REMOTE_CLOSED;
2456 addr = strtoul(parse, &parse, 16);
2457 if (*(parse++) != ':') {
2458 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2459 return ERROR_SERVER_REMOTE_CLOSED;
2461 length = packet_size - (parse - packet);
2463 /* create a new image if there isn't already one */
2464 if (gdb_connection->vflash_image == NULL) {
2465 gdb_connection->vflash_image = malloc(sizeof(struct image));
2466 image_open(gdb_connection->vflash_image, "", "build");
2469 /* create new section with content from packet buffer */
2470 retval = image_add_section(gdb_connection->vflash_image,
2471 addr, length, 0x0, (uint8_t *)parse);
2472 if (retval != ERROR_OK)
2475 gdb_put_packet(connection, "OK", 2);
2480 if (strncmp(packet, "vFlashDone", 10) == 0) {
2483 /* process the flashing buffer. No need to erase as GDB
2484 * always issues a vFlashErase first. */
2485 target_call_event_callbacks(gdb_service->target,
2486 TARGET_EVENT_GDB_FLASH_WRITE_START);
2487 result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0);
2488 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_END);
2489 if (result != ERROR_OK) {
2490 if (result == ERROR_FLASH_DST_OUT_OF_BANK)
2491 gdb_put_packet(connection, "E.memtype", 9);
2493 gdb_send_error(connection, EIO);
2495 LOG_DEBUG("wrote %u bytes from vFlash image to flash", (unsigned)written);
2496 gdb_put_packet(connection, "OK", 2);
2499 image_close(gdb_connection->vflash_image);
2500 free(gdb_connection->vflash_image);
2501 gdb_connection->vflash_image = NULL;
2506 gdb_put_packet(connection, "", 0);
2510 static int gdb_detach(struct connection *connection)
2512 struct gdb_service *gdb_service = connection->service->priv;
2514 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_DETACH);
2516 return gdb_put_packet(connection, "OK", 2);
2519 /* The format of 'F' response packet is
2520 * Fretcode,errno,Ctrl-C flag;call-specific attachment
2522 static int gdb_fileio_response_packet(struct connection *connection,
2523 char *packet, int packet_size)
2525 struct target *target = get_target_from_connection(connection);
2527 char *parsing_point;
2528 int fileio_retcode = strtoul(packet + 1, &separator, 16);
2529 int fileio_errno = 0;
2530 bool fileio_ctrl_c = false;
2535 if (*separator == ',') {
2536 parsing_point = separator + 1;
2537 fileio_errno = strtoul(parsing_point, &separator, 16);
2538 if (*separator == ',') {
2539 if (*(separator + 1) == 'C') {
2540 /* TODO: process ctrl-c */
2541 fileio_ctrl_c = true;
2546 LOG_DEBUG("File-I/O response, retcode: 0x%x, errno: 0x%x, ctrl-c: %s",
2547 fileio_retcode, fileio_errno, fileio_ctrl_c ? "true" : "false");
2549 retval = target_gdb_fileio_end(target, fileio_retcode, fileio_errno, fileio_ctrl_c);
2550 if (retval != ERROR_OK)
2553 /* After File-I/O ends, keep continue or step */
2554 if (gdb_running_type == 'c')
2555 retval = target_resume(target, 1, 0x0, 0, 0);
2556 else if (gdb_running_type == 's')
2557 retval = target_step(target, 1, 0x0, 0);
2559 retval = ERROR_FAIL;
2561 if (retval != ERROR_OK)
2567 static void gdb_log_callback(void *priv, const char *file, unsigned line,
2568 const char *function, const char *string)
2570 struct connection *connection = priv;
2571 struct gdb_connection *gdb_con = connection->priv;
2573 if (gdb_con->busy) {
2574 /* do not reply this using the O packet */
2578 gdb_output_con(connection, string);
2581 static void gdb_sig_halted(struct connection *connection)
2584 snprintf(sig_reply, 4, "T%2.2x", 2);
2585 gdb_put_packet(connection, sig_reply, 3);
2588 static int gdb_input_inner(struct connection *connection)
2590 /* Do not allocate this on the stack */
2591 static char gdb_packet_buffer[GDB_BUFFER_SIZE];
2593 struct gdb_service *gdb_service = connection->service->priv;
2594 struct target *target = gdb_service->target;
2595 char *packet = gdb_packet_buffer;
2598 struct gdb_connection *gdb_con = connection->priv;
2599 static int extended_protocol;
2601 /* drain input buffer. If one of the packets fail, then an error
2602 * packet is replied, if applicable.
2604 * This loop will terminate and the error code is returned.
2606 * The calling fn will check if this error is something that
2607 * can be recovered from, or if the connection must be closed.
2609 * If the error is recoverable, this fn is called again to
2610 * drain the rest of the buffer.
2613 packet_size = GDB_BUFFER_SIZE-1;
2614 retval = gdb_get_packet(connection, packet, &packet_size);
2615 if (retval != ERROR_OK)
2618 /* terminate with zero */
2619 packet[packet_size] = 0;
2621 if (LOG_LEVEL_IS(LOG_LVL_DEBUG)) {
2622 if (packet[0] == 'X') {
2623 /* binary packets spew junk into the debug log stream */
2626 for (x = 0; (x < 49) && (packet[x] != ':'); x++)
2629 LOG_DEBUG("received packet: '%s:<binary-data>'", buf);
2631 LOG_DEBUG("received packet: '%s'", packet);
2634 if (packet_size > 0) {
2636 switch (packet[0]) {
2637 case 'T': /* Is thread alive? */
2638 gdb_thread_packet(connection, packet, packet_size);
2640 case 'H': /* Set current thread ( 'c' for step and continue,
2641 * 'g' for all other operations ) */
2642 gdb_thread_packet(connection, packet, packet_size);
2646 retval = gdb_thread_packet(connection, packet, packet_size);
2647 if (retval == GDB_THREAD_PACKET_NOT_CONSUMED)
2648 retval = gdb_query_packet(connection, packet, packet_size);
2651 retval = gdb_get_registers_packet(connection, packet, packet_size);
2654 retval = gdb_set_registers_packet(connection, packet, packet_size);
2657 retval = gdb_get_register_packet(connection, packet, packet_size);
2660 retval = gdb_set_register_packet(connection, packet, packet_size);
2663 retval = gdb_read_memory_packet(connection, packet, packet_size);
2666 retval = gdb_write_memory_packet(connection, packet, packet_size);
2670 retval = gdb_breakpoint_watchpoint_packet(connection, packet, packet_size);
2673 gdb_last_signal_packet(connection, packet, packet_size);
2678 gdb_thread_packet(connection, packet, packet_size);
2679 log_add_callback(gdb_log_callback, connection);
2681 if (gdb_con->mem_write_error) {
2682 LOG_ERROR("Memory write failure!");
2684 /* now that we have reported the memory write error,
2685 * we can clear the condition */
2686 gdb_con->mem_write_error = false;
2689 bool nostep = false;
2690 bool already_running = false;
2691 if (target->state == TARGET_RUNNING) {
2692 LOG_WARNING("WARNING! The target is already running. "
2693 "All changes GDB did to registers will be discarded! "
2694 "Waiting for target to halt.");
2695 already_running = true;
2696 } else if (target->state != TARGET_HALTED) {
2697 LOG_WARNING("The target is not in the halted nor running stated, " \
2698 "stepi/continue ignored.");
2700 } else if ((packet[0] == 's') && gdb_con->sync) {
2701 /* Hmm..... when you issue a continue in GDB, then a "stepi" is
2702 * sent by GDB first to OpenOCD, thus defeating the check to
2703 * make only the single stepping have the sync feature...
2706 LOG_WARNING("stepi ignored. GDB will now fetch the register state " \
2707 "from the target.");
2709 gdb_con->sync = false;
2711 if (!already_running && nostep) {
2712 /* Either the target isn't in the halted state, then we can't
2713 * step/continue. This might be early setup, etc.
2715 * Or we want to allow GDB to pick up a fresh set of
2716 * register values without modifying the target state.
2719 gdb_sig_halted(connection);
2721 /* stop forwarding log packets! */
2722 log_remove_callback(gdb_log_callback, connection);
2724 /* We're running/stepping, in which case we can
2725 * forward log output until the target is halted
2727 gdb_con->frontend_state = TARGET_RUNNING;
2728 target_call_event_callbacks(target, TARGET_EVENT_GDB_START);
2730 if (!already_running) {
2731 /* Here we don't want packet processing to stop even if this fails,
2732 * so we use a local variable instead of retval. */
2733 retval = gdb_step_continue_packet(connection, packet, packet_size);
2734 if (retval != ERROR_OK) {
2735 /* we'll never receive a halted
2736 * condition... issue a false one..
2738 gdb_frontend_halted(target, connection);
2745 retval = gdb_v_packet(connection, packet, packet_size);
2748 retval = gdb_detach(connection);
2749 extended_protocol = 0;
2752 retval = gdb_write_memory_binary_packet(connection, packet, packet_size);
2753 if (retval != ERROR_OK)
2757 if (extended_protocol != 0) {
2758 gdb_con->attached = false;
2761 gdb_put_packet(connection, "OK", 2);
2762 return ERROR_SERVER_REMOTE_CLOSED;
2764 /* handle extended remote protocol */
2765 extended_protocol = 1;
2766 gdb_put_packet(connection, "OK", 2);
2769 /* handle extended restart packet */
2770 breakpoint_clear_target(gdb_service->target);
2771 watchpoint_clear_target(gdb_service->target);
2772 command_run_linef(connection->cmd_ctx, "ocd_gdb_restart %s",
2773 target_name(target));
2774 /* set connection as attached after reset */
2775 gdb_con->attached = true;
2776 /* info rtos parts */
2777 gdb_thread_packet(connection, packet, packet_size);
2781 /* packet supported only by smp target i.e cortex_a.c*/
2782 /* handle smp packet replying coreid played to gbd */
2783 gdb_read_smp_packet(connection, packet, packet_size);
2787 /* packet supported only by smp target i.e cortex_a.c */
2788 /* handle smp packet setting coreid to be played at next
2790 gdb_write_smp_packet(connection, packet, packet_size);
2794 /* File-I/O extension */
2795 /* After gdb uses host-side syscall to complete target file
2796 * I/O, gdb sends host-side syscall return value to target
2798 * The format of 'F' response packet is
2799 * Fretcode,errno,Ctrl-C flag;call-specific attachment
2801 gdb_con->frontend_state = TARGET_RUNNING;
2802 log_add_callback(gdb_log_callback, connection);
2803 gdb_fileio_response_packet(connection, packet, packet_size);
2807 /* ignore unknown packets */
2808 LOG_DEBUG("ignoring 0x%2.2x packet", packet[0]);
2809 gdb_put_packet(connection, NULL, 0);
2813 /* if a packet handler returned an error, exit input loop */
2814 if (retval != ERROR_OK)
2818 if (gdb_con->ctrl_c) {
2819 if (target->state == TARGET_RUNNING) {
2820 retval = target_halt(target);
2821 if (retval != ERROR_OK)
2822 target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
2823 gdb_con->ctrl_c = 0;
2825 LOG_INFO("The target is not running when halt was requested, stopping GDB.");
2826 target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
2830 } while (gdb_con->buf_cnt > 0);
2835 static int gdb_input(struct connection *connection)
2837 int retval = gdb_input_inner(connection);
2838 struct gdb_connection *gdb_con = connection->priv;
2839 if (retval == ERROR_SERVER_REMOTE_CLOSED)
2842 /* logging does not propagate the error, yet can set the gdb_con->closed flag */
2843 if (gdb_con->closed)
2844 return ERROR_SERVER_REMOTE_CLOSED;
2846 /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
2850 static int gdb_target_start(struct target *target, const char *port)
2852 struct gdb_service *gdb_service;
2854 gdb_service = malloc(sizeof(struct gdb_service));
2856 if (NULL == gdb_service)
2859 gdb_service->target = target;
2860 gdb_service->core[0] = -1;
2861 gdb_service->core[1] = -1;
2862 target->gdb_service = gdb_service;
2864 ret = add_service("gdb",
2865 port, 1, &gdb_new_connection, &gdb_input,
2866 &gdb_connection_closed, gdb_service);
2867 /* initialialize all targets gdb service with the same pointer */
2869 struct target_list *head;
2870 struct target *curr;
2871 head = target->head;
2872 while (head != (struct target_list *)NULL) {
2873 curr = head->target;
2875 curr->gdb_service = gdb_service;
2882 static int gdb_target_add_one(struct target *target)
2884 /* one gdb instance per smp list */
2885 if ((target->smp) && (target->gdb_service))
2887 int retval = gdb_target_start(target, gdb_port_next);
2888 if (retval == ERROR_OK) {
2890 /* If we can parse the port number
2891 * then we increment the port number for the next target.
2894 portnumber = strtol(gdb_port_next, &end, 0);
2896 if (parse_long(gdb_port_next, &portnumber) == ERROR_OK) {
2897 free((void *)gdb_port_next);
2898 gdb_port_next = alloc_printf("%d", portnumber+1);
2905 int gdb_target_add_all(struct target *target)
2907 if (NULL == target) {
2908 LOG_WARNING("gdb services need one or more targets defined");
2912 while (NULL != target) {
2913 int retval = gdb_target_add_one(target);
2914 if (ERROR_OK != retval)
2917 target = target->next;
2923 COMMAND_HANDLER(handle_gdb_sync_command)
2926 return ERROR_COMMAND_SYNTAX_ERROR;
2928 if (current_gdb_connection == NULL) {
2929 command_print(CMD_CTX,
2930 "gdb_sync command can only be run from within gdb using \"monitor gdb_sync\"");
2934 current_gdb_connection->sync = true;
2939 /* daemon configuration command gdb_port */
2940 COMMAND_HANDLER(handle_gdb_port_command)
2942 int retval = CALL_COMMAND_HANDLER(server_pipe_command, &gdb_port);
2943 if (ERROR_OK == retval) {
2944 free((void *)gdb_port_next);
2945 gdb_port_next = strdup(gdb_port);
2950 COMMAND_HANDLER(handle_gdb_memory_map_command)
2953 return ERROR_COMMAND_SYNTAX_ERROR;
2955 COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_use_memory_map);
2959 COMMAND_HANDLER(handle_gdb_flash_program_command)
2962 return ERROR_COMMAND_SYNTAX_ERROR;
2964 COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_flash_program);
2968 COMMAND_HANDLER(handle_gdb_report_data_abort_command)
2971 return ERROR_COMMAND_SYNTAX_ERROR;
2973 COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_report_data_abort);
2977 /* gdb_breakpoint_override */
2978 COMMAND_HANDLER(handle_gdb_breakpoint_override_command)
2980 if (CMD_ARGC == 0) {
2982 } else if (CMD_ARGC == 1) {
2983 gdb_breakpoint_override = 1;
2984 if (strcmp(CMD_ARGV[0], "hard") == 0)
2985 gdb_breakpoint_override_type = BKPT_HARD;
2986 else if (strcmp(CMD_ARGV[0], "soft") == 0)
2987 gdb_breakpoint_override_type = BKPT_SOFT;
2988 else if (strcmp(CMD_ARGV[0], "disable") == 0)
2989 gdb_breakpoint_override = 0;
2991 return ERROR_COMMAND_SYNTAX_ERROR;
2992 if (gdb_breakpoint_override)
2993 LOG_USER("force %s breakpoints",
2994 (gdb_breakpoint_override_type == BKPT_HARD) ? "hard" : "soft");
2996 LOG_USER("breakpoint type is not overridden");
3001 COMMAND_HANDLER(handle_gdb_target_description_command)
3004 return ERROR_COMMAND_SYNTAX_ERROR;
3006 COMMAND_PARSE_ENABLE(CMD_ARGV[0], gdb_use_target_description);
3010 COMMAND_HANDLER(handle_gdb_save_tdesc_command)
3013 uint32_t tdesc_length;
3014 struct target *target = get_current_target(CMD_CTX);
3015 char *tdesc_filename;
3017 int retval = gdb_generate_target_description(target, &tdesc);
3018 if (retval != ERROR_OK) {
3019 LOG_ERROR("Unable to Generate Target Description");
3023 tdesc_length = strlen(tdesc);
3025 if (tdesc_length == 0) {
3026 LOG_ERROR("Unable to Generate Target Description");
3030 struct fileio fileio;
3031 size_t size_written;
3033 tdesc_filename = malloc(strlen(target_type_name(target)) + 5);
3034 sprintf(tdesc_filename, "%s.xml", target_type_name(target));
3036 retval = fileio_open(&fileio, tdesc_filename, FILEIO_WRITE, FILEIO_TEXT);
3038 if (retval != ERROR_OK) {
3039 LOG_WARNING("Can't open %s for writing", tdesc_filename);
3040 free(tdesc_filename);
3044 retval = fileio_write(&fileio, tdesc_length, tdesc, &size_written);
3046 fileio_close(&fileio);
3047 free(tdesc_filename);
3050 if (retval != ERROR_OK) {
3051 LOG_WARNING("Error while writing the tdesc file");
3058 static const struct command_registration gdb_command_handlers[] = {
3061 .handler = handle_gdb_sync_command,
3062 .mode = COMMAND_ANY,
3063 .help = "next stepi will return immediately allowing "
3064 "GDB to fetch register state without affecting "
3070 .handler = handle_gdb_port_command,
3071 .mode = COMMAND_ANY,
3072 .help = "Normally gdb listens to a TCP/IP port. Each subsequent GDB "
3073 "server listens for the next port number after the "
3074 "base port number specified. "
3075 "No arguments reports GDB port. \"pipe\" means listen to stdin "
3076 "output to stdout, an integer is base port number, \"disable\" disables "
3077 "port. Any other string is are interpreted as named pipe to listen to. "
3078 "Output pipe is the same name as input pipe, but with 'o' appended.",
3079 .usage = "[port_num]",
3082 .name = "gdb_memory_map",
3083 .handler = handle_gdb_memory_map_command,
3084 .mode = COMMAND_CONFIG,
3085 .help = "enable or disable memory map",
3086 .usage = "('enable'|'disable')"
3089 .name = "gdb_flash_program",
3090 .handler = handle_gdb_flash_program_command,
3091 .mode = COMMAND_CONFIG,
3092 .help = "enable or disable flash program",
3093 .usage = "('enable'|'disable')"
3096 .name = "gdb_report_data_abort",
3097 .handler = handle_gdb_report_data_abort_command,
3098 .mode = COMMAND_CONFIG,
3099 .help = "enable or disable reporting data aborts",
3100 .usage = "('enable'|'disable')"
3103 .name = "gdb_breakpoint_override",
3104 .handler = handle_gdb_breakpoint_override_command,
3105 .mode = COMMAND_ANY,
3106 .help = "Display or specify type of breakpoint "
3107 "to be used by gdb 'break' commands.",
3108 .usage = "('hard'|'soft'|'disable')"
3111 .name = "gdb_target_description",
3112 .handler = handle_gdb_target_description_command,
3113 .mode = COMMAND_CONFIG,
3114 .help = "enable or disable target description",
3115 .usage = "('enable'|'disable')"
3118 .name = "gdb_save_tdesc",
3119 .handler = handle_gdb_save_tdesc_command,
3120 .mode = COMMAND_EXEC,
3121 .help = "Save the target description file",
3123 COMMAND_REGISTRATION_DONE
3126 int gdb_register_commands(struct command_context *cmd_ctx)
3128 gdb_port = strdup("3333");
3129 gdb_port_next = strdup("3333");
3130 return register_commands(cmd_ctx, NULL, gdb_command_handlers);