1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
30 #include "replacements.h"
32 #include "gdb_server.h"
36 #include "binarybuffer.h"
38 #include "breakpoints.h"
41 #include "target_request.h"
42 #include "configuration.h"
50 #define _DEBUG_GDB_IO_
53 static int gdb_breakpoint_override;
54 static enum breakpoint_type gdb_breakpoint_override_type;
56 extern int gdb_error(connection_t *connection, int retval);
57 static unsigned short gdb_port;
58 static const char *DIGITS = "0123456789abcdef";
60 static void gdb_log_callback(void *priv, const char *file, int line,
61 const char *function, const char *string);
71 /* target behaviour on gdb detach */
72 enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME;
74 /* set if we are sending a memory map to gdb
75 * via qXfer:memory-map:read packet */
76 /* enabled by default*/
77 int gdb_use_memory_map = 1;
78 /* enabled by default*/
79 int gdb_flash_program = 1;
81 /* if set, data aborts cause an error to be reported in memory read packets
82 * see the code in gdb_read_memory_packet() for further explanations */
83 int gdb_report_data_abort = 0;
85 int gdb_last_signal(target_t *target)
87 switch (target->debug_reason)
89 case DBG_REASON_DBGRQ:
90 return 0x2; /* SIGINT */
91 case DBG_REASON_BREAKPOINT:
92 case DBG_REASON_WATCHPOINT:
93 case DBG_REASON_WPTANDBKPT:
94 return 0x05; /* SIGTRAP */
95 case DBG_REASON_SINGLESTEP:
96 return 0x05; /* SIGTRAP */
97 case DBG_REASON_NOTHALTED:
98 return 0x0; /* no signal... shouldn't happen */
100 LOG_USER("undefined debug reason %d - target needs reset", target->debug_reason);
105 int check_pending(connection_t *connection, int timeout_s, int *got_data)
107 /* a non-blocking socket will block if there is 0 bytes available on the socket,
108 * but return with as many bytes as are available immediately
112 gdb_connection_t *gdb_con = connection->priv;
118 if (gdb_con->buf_cnt>0)
125 FD_SET(connection->fd, &read_fds);
127 tv.tv_sec = timeout_s;
129 if (select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0)
131 /* This can typically be because a "monitor" command took too long
132 * before printing any progress messages
136 return ERROR_GDB_TIMEOUT;
142 *got_data=FD_ISSET(connection->fd, &read_fds)!=0;
146 int gdb_get_char(connection_t *connection, int* next_char)
148 gdb_connection_t *gdb_con = connection->priv;
151 #ifdef _DEBUG_GDB_IO_
155 if (gdb_con->buf_cnt-- > 0)
157 *next_char = *(gdb_con->buf_p++);
158 if (gdb_con->buf_cnt > 0)
159 connection->input_pending = 1;
161 connection->input_pending = 0;
163 #ifdef _DEBUG_GDB_IO_
164 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
172 retval=check_pending(connection, 1, NULL);
173 if (retval!=ERROR_OK)
175 gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
176 if (gdb_con->buf_cnt > 0)
180 if (gdb_con->buf_cnt == 0)
183 return ERROR_SERVER_REMOTE_CLOSED;
187 errno = WSAGetLastError();
194 case WSAECONNABORTED:
196 return ERROR_SERVER_REMOTE_CLOSED;
199 return ERROR_SERVER_REMOTE_CLOSED;
201 LOG_ERROR("read: %d", errno);
212 return ERROR_SERVER_REMOTE_CLOSED;
215 return ERROR_SERVER_REMOTE_CLOSED;
217 LOG_ERROR("read: %s", strerror(errno));
219 return ERROR_SERVER_REMOTE_CLOSED;
224 #ifdef _DEBUG_GDB_IO_
225 debug_buffer = malloc(gdb_con->buf_cnt + 1);
226 memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt);
227 debug_buffer[gdb_con->buf_cnt] = 0;
228 LOG_DEBUG("received '%s'", debug_buffer);
232 gdb_con->buf_p = gdb_con->buffer;
234 *next_char = *(gdb_con->buf_p++);
235 if (gdb_con->buf_cnt > 0)
236 connection->input_pending = 1;
238 connection->input_pending = 0;
239 #ifdef _DEBUG_GDB_IO_
240 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
246 int gdb_putback_char(connection_t *connection, int last_char)
248 gdb_connection_t *gdb_con = connection->priv;
250 if (gdb_con->buf_p > gdb_con->buffer)
252 *(--gdb_con->buf_p) = last_char;
257 LOG_ERROR("BUG: couldn't put character back");
263 /* The only way we can detect that the socket is closed is the first time
264 * we write to it, we will fail. Subsequent write operations will
265 * succeed. Shudder! */
266 int gdb_write(connection_t *connection, void *data, int len)
268 gdb_connection_t *gdb_con = connection->priv;
270 return ERROR_SERVER_REMOTE_CLOSED;
272 if (write_socket(connection->fd, data, len) == len)
277 return ERROR_SERVER_REMOTE_CLOSED;
280 int gdb_put_packet_inner(connection_t *connection, char *buffer, int len)
283 unsigned char my_checksum = 0;
284 #ifdef _DEBUG_GDB_IO_
289 gdb_connection_t *gdb_con = connection->priv;
291 for (i = 0; i < len; i++)
292 my_checksum += buffer[i];
294 #ifdef _DEBUG_GDB_IO_
296 * At this point we should have nothing in the input queue from GDB,
297 * however sometimes '-' is sent even though we've already received
298 * an ACK (+) for everything we've sent off.
303 if ((retval=check_pending(connection, 0, &gotdata))!=ERROR_OK)
307 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
310 // fix a problem with some IAR tools
311 gdb_putback_char( connection, reply );
312 LOG_DEBUG("Unexpected start of new packet");
316 LOG_WARNING("Discard unexpected char %c", reply);
322 #ifdef _DEBUG_GDB_IO_
323 debug_buffer = malloc(len + 1);
324 memcpy(debug_buffer, buffer, len);
325 debug_buffer[len] = 0;
326 LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
330 char local_buffer[1024];
331 local_buffer[0] = '$';
332 if (len+4 <= sizeof(local_buffer))
334 /* performance gain on smaller packets by only a single call to gdb_write() */
335 memcpy(local_buffer+1, buffer, len++);
336 local_buffer[len++] = '#';
337 local_buffer[len++] = DIGITS[(my_checksum >> 4) & 0xf];
338 local_buffer[len++] = DIGITS[my_checksum & 0xf];
339 if((retval = gdb_write(connection, local_buffer, len)) != ERROR_OK)
346 /* larger packets are transmitted directly from caller supplied buffer
347 by several calls to gdb_write() to avoid dynamic allocation */
348 local_buffer[1] = '#';
349 local_buffer[2] = DIGITS[(my_checksum >> 4) & 0xf];
350 local_buffer[3] = DIGITS[my_checksum & 0xf];
351 if((retval = gdb_write(connection, local_buffer, 1)) != ERROR_OK)
355 if((retval = gdb_write(connection, buffer, len)) != ERROR_OK)
359 if((retval = gdb_write(connection, local_buffer+1, 3)) != ERROR_OK)
365 if (gdb_con->noack_mode)
368 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
373 else if (reply == '-')
375 /* Stop sending output packets for now */
376 log_remove_callback(gdb_log_callback, connection);
377 LOG_WARNING("negative reply, retrying");
379 else if (reply == 0x3)
382 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
386 else if (reply == '-')
388 /* Stop sending output packets for now */
389 log_remove_callback(gdb_log_callback, connection);
390 LOG_WARNING("negative reply, retrying");
392 else if( reply == '$' ){
393 LOG_ERROR("GDB missing ack(1) - assumed good");
394 gdb_putback_char( connection, reply );
398 LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply);
400 return ERROR_SERVER_REMOTE_CLOSED;
403 else if( reply == '$' ){
404 LOG_ERROR("GDB missing ack(2) - assumed good");
405 gdb_putback_char( connection, reply );
410 LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection", reply);
412 return ERROR_SERVER_REMOTE_CLOSED;
416 return ERROR_SERVER_REMOTE_CLOSED;
421 int gdb_put_packet(connection_t *connection, char *buffer, int len)
423 gdb_connection_t *gdb_con = connection->priv;
425 int retval = gdb_put_packet_inner(connection, buffer, len);
428 /* we sent some data, reset timer for keep alive messages */
434 static __inline__ int fetch_packet(connection_t *connection, int *checksum_ok, int noack, int *len, char *buffer)
436 unsigned char my_checksum = 0;
441 gdb_connection_t *gdb_con = connection->priv;
447 /* The common case is that we have an entire packet with no escape chars.
448 * We need to leave at least 2 bytes in the buffer to have
449 * gdb_get_char() update various bits and bobs correctly.
451 if ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt+count) < *len))
453 /* The compiler will struggle a bit with constant propagation and
454 * aliasing, so we help it by showing that these values do not
455 * change inside the loop
458 char *buf = gdb_con->buf_p;
459 int run = gdb_con->buf_cnt - 2;
466 if (character == '#')
468 /* Danger! character can be '#' when esc is
469 * used so we need an explicit boolean for done here.
475 if (character == '}')
477 /* data transmitted in binary mode (X packet)
478 * uses 0x7d as escape character */
479 my_checksum += character & 0xff;
482 my_checksum += character & 0xff;
483 buffer[count++] = (character ^ 0x20) & 0xff;
487 my_checksum += character & 0xff;
488 buffer[count++] = character & 0xff;
492 gdb_con->buf_cnt -= i;
498 LOG_ERROR("packet buffer too small");
499 return ERROR_GDB_BUFFER_TOO_SMALL;
502 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
505 if (character == '#')
508 if (character == '}')
510 /* data transmitted in binary mode (X packet)
511 * uses 0x7d as escape character */
512 my_checksum += character & 0xff;
513 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
515 my_checksum += character & 0xff;
516 buffer[count++] = (character ^ 0x20) & 0xff;
520 my_checksum += character & 0xff;
521 buffer[count++] = character & 0xff;
527 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
529 checksum[0] = character;
530 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
532 checksum[1] = character;
537 *checksum_ok=(my_checksum == strtoul(checksum, NULL, 16));
543 int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len)
547 gdb_connection_t *gdb_con = connection->priv;
553 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
556 #ifdef _DEBUG_GDB_IO_
557 LOG_DEBUG("character: '%c'", character);
565 /* gdb sends a dummy ack '+' at every remote connect - see remote_start_remote (remote.c)
566 * incase anyone tries to debug why they receive this warning every time */
567 LOG_WARNING("acknowledgment received, but no packet pending");
570 LOG_WARNING("negative acknowledgment, but no packet pending");
577 LOG_WARNING("ignoring character 0x%x", character);
580 } while (character != '$');
585 /* explicit code expansion here to get faster inlined code in -O3 by not
586 * calculating checksum
588 if (gdb_con->noack_mode)
590 if ((retval=fetch_packet(connection, &checksum_ok, 1, len, buffer))!=ERROR_OK)
594 if ((retval=fetch_packet(connection, &checksum_ok, 0, len, buffer))!=ERROR_OK)
598 if (gdb_con->noack_mode)
600 /* checksum is not checked in noack mode */
605 if ((retval = gdb_write(connection, "+", 1)) != ERROR_OK)
613 return ERROR_SERVER_REMOTE_CLOSED;
618 int gdb_get_packet(connection_t *connection, char *buffer, int *len)
620 gdb_connection_t *gdb_con = connection->priv;
622 int retval = gdb_get_packet_inner(connection, buffer, len);
627 int gdb_output_con(connection_t *connection, const char* line)
632 bin_size = strlen(line);
634 hex_buffer = malloc(bin_size*2 + 2);
635 if (hex_buffer == NULL)
636 return ERROR_GDB_BUFFER_TOO_SMALL;
639 for (i=0; i<bin_size; i++)
640 snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);
641 hex_buffer[bin_size*2+1] = 0;
643 int retval = gdb_put_packet(connection, hex_buffer, bin_size*2 + 1);
649 int gdb_output(struct command_context_s *context, const char* line)
651 /* this will be dumped to the log and also sent as an O packet if possible */
652 LOG_USER_N("%s", line);
657 static void gdb_frontend_halted(struct target_s *target, connection_t *connection)
659 gdb_connection_t *gdb_connection = connection->priv;
661 /* In the GDB protocol when we are stepping or coninuing execution,
662 * we have a lingering reply. Upon receiving a halted event
663 * when we have that lingering packet, we reply to the original
664 * step or continue packet.
666 * Executing monitor commands can bring the target in and
667 * out of the running state so we'll see lots of TARGET_EVENT_XXX
668 * that are to be ignored.
670 if (gdb_connection->frontend_state == TARGET_RUNNING)
675 /* stop forwarding log packets! */
676 log_remove_callback(gdb_log_callback, connection);
678 if (gdb_connection->ctrl_c)
681 gdb_connection->ctrl_c = 0;
685 signal = gdb_last_signal(target);
688 snprintf(sig_reply, 4, "T%2.2x", signal);
689 gdb_put_packet(connection, sig_reply, 3);
690 gdb_connection->frontend_state = TARGET_HALTED;
694 int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
697 connection_t *connection = priv;
699 target_handle_event( target, event );
702 case TARGET_EVENT_EARLY_HALTED:
703 gdb_frontend_halted(target, connection);
705 case TARGET_EVENT_HALTED:
706 target_call_event_callbacks(target, TARGET_EVENT_GDB_END);
708 case TARGET_EVENT_GDB_FLASH_ERASE_START:
709 target_handle_event( target, TARGET_EVENT_OLD_gdb_program_config );
710 if((retval = jtag_execute_queue()) != ERROR_OK)
723 int gdb_new_connection(connection_t *connection)
725 gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t));
726 gdb_service_t *gdb_service = connection->service->priv;
730 connection->priv = gdb_connection;
732 /* initialize gdb connection information */
733 gdb_connection->buf_p = gdb_connection->buffer;
734 gdb_connection->buf_cnt = 0;
735 gdb_connection->ctrl_c = 0;
736 gdb_connection->frontend_state = TARGET_HALTED;
737 gdb_connection->vflash_image = NULL;
738 gdb_connection->closed = 0;
739 gdb_connection->busy = 0;
740 gdb_connection->noack_mode = 0;
742 /* send ACK to GDB for debug request */
743 gdb_write(connection, "+", 1);
745 /* output goes through gdb connection */
746 command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
748 /* we must remove all breakpoints registered to the target as a previous
749 * GDB session could leave dangling breakpoints if e.g. communication
752 breakpoint_clear_target(gdb_service->target);
753 watchpoint_clear_target(gdb_service->target);
755 /* register callback to be informed about target events */
756 target_register_event_callback(gdb_target_callback_event_handler, connection);
758 /* a gdb session just attached, try to put the target in halt mode.
762 * If the halt fails(e.g. target needs a reset, JTAG communication not
763 * working, etc.), then the GDB connect will succeed as
764 * the get_gdb_reg_list() will lie and return a register list with
767 * This allows GDB monitor commands to be run from a GDB init script to
768 * initialize the target
770 * Also, since the halt() is asynchronous target connect will be
771 * instantaneous and thus avoiding annoying timeout problems during
774 target_halt(gdb_service->target);
775 /* FIX!!!! could extended-remote work better here?
777 * wait a tiny bit for halted state or we just continue. The
778 * GDB register packet will then contain garbage
780 target_wait_state(gdb_service->target, TARGET_HALTED, 500);
782 /* remove the initial ACK from the incoming buffer */
783 if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
786 /* FIX!!!??? would we actually ever receive a + here???
789 if (initial_ack != '+')
790 gdb_putback_char(connection, initial_ack);
791 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_ATTACH );
795 int gdb_connection_closed(connection_t *connection)
797 gdb_service_t *gdb_service = connection->service->priv;
798 gdb_connection_t *gdb_connection = connection->priv;
800 /* see if an image built with vFlash commands is left */
801 if (gdb_connection->vflash_image)
803 image_close(gdb_connection->vflash_image);
804 free(gdb_connection->vflash_image);
805 gdb_connection->vflash_image = NULL;
808 /* if this connection registered a debug-message receiver delete it */
809 delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
811 if (connection->priv)
813 free(connection->priv);
814 connection->priv = NULL;
818 LOG_ERROR("BUG: connection->priv == NULL");
821 target_unregister_event_callback(gdb_target_callback_event_handler, connection);
822 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_END);
823 log_remove_callback(gdb_log_callback, connection);
825 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_DETACH );
830 void gdb_send_error(connection_t *connection, u8 the_error)
833 snprintf(err, 4, "E%2.2X", the_error );
834 gdb_put_packet(connection, err, 3);
837 int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
842 signal = gdb_last_signal(target);
844 snprintf(sig_reply, 4, "S%2.2x", signal);
845 gdb_put_packet(connection, sig_reply, 3);
851 static int gdb_reg_pos(target_t *target, int pos, int len)
853 if (target->endianness == TARGET_LITTLE_ENDIAN)
856 return len - 1 - pos;
859 /* Convert register to string of bytes. NB! The # of bits in the
860 * register might be non-divisible by 8(a byte), in which
861 * case an entire byte is shown.
863 * NB! the format on the wire is the target endianess
865 * The format of reg->value is little endian
868 void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg)
875 buf_len = CEIL(reg->size, 8);
877 for (i = 0; i < buf_len; i++)
879 int j = gdb_reg_pos(target, i, buf_len);
880 tstr[i*2] = DIGITS[(buf[j]>>4) & 0xf];
881 tstr[i*2+1] = DIGITS[buf[j]&0xf];
885 static int hextoint(char c)
896 LOG_ERROR("BUG: invalid register value %08x", c);
900 /* copy over in register buffer */
901 void gdb_target_to_reg(target_t *target, char *tstr, int str_len, u8 *bin)
905 LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
910 for (i = 0; i < str_len; i+=2)
912 u8 t = hextoint(tstr[i])<<4;
913 t |= hextoint(tstr[i+1]);
915 int j = gdb_reg_pos(target, i/2, str_len/2);
920 int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
925 int reg_packet_size = 0;
930 #ifdef _DEBUG_GDB_IO_
934 if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
936 return gdb_error(connection, retval);
939 for (i = 0; i < reg_list_size; i++)
941 reg_packet_size += reg_list[i]->size;
944 reg_packet = malloc(CEIL(reg_packet_size, 8) * 2);
945 reg_packet_p = reg_packet;
947 for (i = 0; i < reg_list_size; i++)
949 gdb_str_to_target(target, reg_packet_p, reg_list[i]);
950 reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;
953 #ifdef _DEBUG_GDB_IO_
956 reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
957 LOG_DEBUG("reg_packet: %s", reg_packet_p);
962 gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);
970 int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
978 #ifdef _DEBUG_GDB_IO_
982 /* skip command character */
988 LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection");
989 return ERROR_SERVER_REMOTE_CLOSED;
992 if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
994 return gdb_error(connection, retval);
998 for (i = 0; i < reg_list_size; i++)
1001 int chars = (CEIL(reg_list[i]->size, 8) * 2);
1003 if (packet_p + chars > packet + packet_size)
1005 LOG_ERROR("BUG: register packet is too small for registers");
1008 reg_arch_type_t *arch_type;
1009 bin_buf = malloc(CEIL(reg_list[i]->size, 8));
1010 gdb_target_to_reg(target, packet_p, chars, bin_buf);
1012 /* get register arch_type, and call set method */
1013 arch_type = register_get_arch_type(reg_list[i]->arch_type);
1015 arch_type->set(reg_list[i], bin_buf);
1017 /* advance packet pointer */
1024 /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
1027 gdb_put_packet(connection, "OK", 2);
1032 int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1035 int reg_num = strtoul(packet + 1, NULL, 16);
1040 #ifdef _DEBUG_GDB_IO_
1044 if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
1046 return gdb_error(connection, retval);
1049 if (reg_list_size <= reg_num)
1051 LOG_ERROR("gdb requested a non-existing register");
1055 reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
1057 gdb_str_to_target(target, reg_packet, reg_list[reg_num]);
1059 gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2);
1067 int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1071 int reg_num = strtoul(packet + 1, &separator, 16);
1075 reg_arch_type_t *arch_type;
1079 if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
1081 return gdb_error(connection, retval);
1084 if (reg_list_size < reg_num)
1086 LOG_ERROR("gdb requested a non-existing register");
1087 return ERROR_SERVER_REMOTE_CLOSED;
1090 if (*separator != '=')
1092 LOG_ERROR("GDB 'set register packet', but no '=' following the register number");
1093 return ERROR_SERVER_REMOTE_CLOSED;
1096 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
1097 bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
1098 int chars = (CEIL(reg_list[reg_num]->size, 8) * 2);
1100 /* fix!!! add some sanity checks on packet size here */
1102 gdb_target_to_reg(target, separator + 1, chars, bin_buf);
1104 /* get register arch_type, and call set method */
1105 arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
1106 arch_type->set(reg_list[reg_num], bin_buf);
1108 gdb_put_packet(connection, "OK", 2);
1116 int gdb_error(connection_t *connection, int retval)
1120 case ERROR_TARGET_DATA_ABORT:
1121 gdb_send_error(connection, EIO);
1123 case ERROR_TARGET_TRANSLATION_FAULT:
1124 gdb_send_error(connection, EFAULT);
1126 case ERROR_TARGET_UNALIGNED_ACCESS:
1127 gdb_send_error(connection, EFAULT);
1129 case ERROR_TARGET_NOT_HALTED:
1130 gdb_send_error(connection, EFAULT);
1133 /* This could be that the target reset itself. */
1134 LOG_ERROR("unexpected error %i", retval);
1135 gdb_send_error(connection, EFAULT);
1142 /* We don't have to worry about the default 2 second timeout for GDB packets,
1143 * because GDB breaks up large memory reads into smaller reads.
1145 * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
1147 int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1156 int retval = ERROR_OK;
1158 /* skip command character */
1161 addr = strtoul(packet, &separator, 16);
1163 if (*separator != ',')
1165 LOG_ERROR("incomplete read memory packet received, dropping connection");
1166 return ERROR_SERVER_REMOTE_CLOSED;
1169 len = strtoul(separator+1, NULL, 16);
1171 buffer = malloc(len);
1173 LOG_DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
1175 retval = target_read_buffer(target, addr, len, buffer);
1177 if ((retval!=ERROR_OK)&&!gdb_report_data_abort)
1179 /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
1180 * At some point this might be fixed in GDB, in which case this code can be removed.
1182 * OpenOCD developers are acutely aware of this problem, but there is nothing
1183 * gained by involving the user in this problem that hopefully will get resolved
1186 * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=2395
1188 * For now, the default is to fix up things to make current GDB versions work.
1189 * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
1191 memset(buffer, 0, len);
1195 if (retval == ERROR_OK)
1197 hex_buffer = malloc(len * 2 + 1);
1200 for (i = 0; i < len; i++)
1203 hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf];
1204 hex_buffer[2 * i + 1] = DIGITS[t & 0xf];
1207 gdb_put_packet(connection, hex_buffer, len * 2);
1213 retval = gdb_error(connection, retval);
1221 int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1232 /* skip command character */
1235 addr = strtoul(packet, &separator, 16);
1237 if (*separator != ',')
1239 LOG_ERROR("incomplete write memory packet received, dropping connection");
1240 return ERROR_SERVER_REMOTE_CLOSED;
1243 len = strtoul(separator+1, &separator, 16);
1245 if (*(separator++) != ':')
1247 LOG_ERROR("incomplete write memory packet received, dropping connection");
1248 return ERROR_SERVER_REMOTE_CLOSED;
1251 buffer = malloc(len);
1253 LOG_DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
1255 for (i=0; i<len; i++)
1258 sscanf(separator + 2*i, "%2x", &tmp);
1262 retval = target_write_buffer(target, addr, len, buffer);
1264 if (retval == ERROR_OK)
1266 gdb_put_packet(connection, "OK", 2);
1270 retval = gdb_error(connection, retval);
1278 int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1286 /* skip command character */
1289 addr = strtoul(packet, &separator, 16);
1291 if (*separator != ',')
1293 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1294 return ERROR_SERVER_REMOTE_CLOSED;
1297 len = strtoul(separator+1, &separator, 16);
1299 if (*(separator++) != ':')
1301 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1302 return ERROR_SERVER_REMOTE_CLOSED;
1308 LOG_DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
1310 retval = target_write_buffer(target, addr, len, (u8*)separator);
1313 if (retval == ERROR_OK)
1315 gdb_put_packet(connection, "OK", 2);
1319 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1326 int gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1330 int retval=ERROR_OK;
1334 if (packet_size > 1)
1336 packet[packet_size] = 0;
1337 address = strtoul(packet + 1, NULL, 16);
1344 if (packet[0] == 'c')
1346 LOG_DEBUG("continue");
1347 target_handle_event( target, TARGET_EVENT_OLD_pre_resume );
1348 retval=target_resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
1350 else if (packet[0] == 's')
1353 retval=target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */
1358 int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1361 enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
1362 enum watchpoint_rw wp_type;
1370 type = strtoul(packet + 1, &separator, 16);
1372 if (type == 0) /* memory breakpoint */
1373 bp_type = BKPT_SOFT;
1374 else if (type == 1) /* hardware breakpoint */
1375 bp_type = BKPT_HARD;
1376 else if (type == 2) /* write watchpoint */
1377 wp_type = WPT_WRITE;
1378 else if (type == 3) /* read watchpoint */
1380 else if (type == 4) /* access watchpoint */
1381 wp_type = WPT_ACCESS;
1383 if (gdb_breakpoint_override&&((bp_type==BKPT_SOFT)||(bp_type==BKPT_HARD)))
1385 bp_type=gdb_breakpoint_override_type;
1388 if (*separator != ',')
1390 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1391 return ERROR_SERVER_REMOTE_CLOSED;
1394 address = strtoul(separator+1, &separator, 16);
1396 if (*separator != ',')
1398 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1399 return ERROR_SERVER_REMOTE_CLOSED;
1402 size = strtoul(separator+1, &separator, 16);
1408 if (packet[0] == 'Z')
1410 if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
1412 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1417 gdb_put_packet(connection, "OK", 2);
1422 breakpoint_remove(target, address);
1423 gdb_put_packet(connection, "OK", 2);
1430 if (packet[0] == 'Z')
1432 if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
1434 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1439 gdb_put_packet(connection, "OK", 2);
1444 watchpoint_remove(target, address);
1445 gdb_put_packet(connection, "OK", 2);
1456 /* print out a string and allocate more space as needed, mainly used for XML at this point */
1457 void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, ...)
1459 if (*retval != ERROR_OK)
1467 if ((*xml == NULL) || (!first))
1469 /* start by 0 to exercise all the code paths.
1470 * Need minimum 2 bytes to fit 1 char and 0 terminator. */
1472 *size = *size * 2 + 2;
1474 *xml = realloc(*xml, *size);
1479 *retval = ERROR_SERVER_REMOTE_CLOSED;
1487 ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
1489 if ((ret > 0) && ((ret + 1) < *size - *pos))
1494 /* there was just enough or not enough space, allocate more. */
1499 static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len)
1503 /* Extract and NUL-terminate the annex. */
1505 while (*buf && *buf != ':')
1511 /* After the read marker and annex, qXfer looks like a
1512 * traditional 'm' packet. */
1514 *ofs = strtoul(buf, &separator, 16);
1516 if (*separator != ',')
1519 *len = strtoul(separator+1, NULL, 16);
1524 int gdb_calc_blocksize(flash_bank_t *bank)
1527 int block_size = 0xffffffff;
1529 /* loop through all sectors and return smallest sector size */
1531 for (i = 0; i < bank->num_sectors; i++)
1533 if (bank->sectors[i].size < block_size)
1534 block_size = bank->sectors[i].size;
1540 static int compare_bank (const void * a, const void * b)
1542 flash_bank_t *b1, *b2;
1543 b1=*((flash_bank_t **)a);
1544 b2=*((flash_bank_t **)b);
1546 if (b1->base==b2->base)
1549 } else if (b1->base>b2->base)
1558 int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1560 command_context_t *cmd_ctx = connection->cmd_ctx;
1561 gdb_connection_t *gdb_connection = connection->priv;
1563 if (strstr(packet, "qRcmd,"))
1565 if (packet_size > 6)
1569 cmd = malloc((packet_size - 6)/2 + 1);
1570 for (i=0; i < (packet_size - 6)/2; i++)
1573 sscanf(packet + 6 + 2*i, "%2x", &tmp);
1576 cmd[(packet_size - 6)/2] = 0x0;
1578 /* We want to print all debug output to GDB connection */
1579 log_add_callback(gdb_log_callback, connection);
1580 target_call_timer_callbacks_now();
1581 command_run_line(cmd_ctx, cmd);
1582 target_call_timer_callbacks_now();
1583 log_remove_callback(gdb_log_callback, connection);
1586 gdb_put_packet(connection, "OK", 2);
1589 else if (strstr(packet, "qCRC:"))
1591 if (packet_size > 5)
1600 /* skip command character */
1603 addr = strtoul(packet, &separator, 16);
1605 if (*separator != ',')
1607 LOG_ERROR("incomplete read memory packet received, dropping connection");
1608 return ERROR_SERVER_REMOTE_CLOSED;
1611 len = strtoul(separator + 1, NULL, 16);
1613 retval = target_checksum_memory(target, addr, len, &checksum);
1615 if (retval == ERROR_OK)
1617 snprintf(gdb_reply, 10, "C%8.8x", checksum);
1618 gdb_put_packet(connection, gdb_reply, 9);
1622 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1629 else if (strstr(packet, "qSupported"))
1631 /* we currently support packet size and qXfer:memory-map:read (if enabled)
1632 * disable qXfer:features:read for the moment */
1633 int retval = ERROR_OK;
1634 char *buffer = NULL;
1638 xml_printf(&retval, &buffer, &pos, &size,
1639 "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-;QStartNoAckMode+",
1640 (GDB_BUFFER_SIZE - 1), ((gdb_use_memory_map == 1)&&(flash_get_bank_count()>0)) ? '+' : '-');
1642 if (retval != ERROR_OK)
1644 gdb_send_error(connection, 01);
1648 gdb_put_packet(connection, buffer, strlen(buffer));
1653 else if (strstr(packet, "qXfer:memory-map:read::")&&(flash_get_bank_count()>0))
1655 /* We get away with only specifying flash here. Regions that are not
1656 * specified are treated as if we provided no memory map(if not we
1657 * could detect the holes and mark them as RAM).
1658 * Normally we only execute this code once, but no big deal if we
1659 * have to regenerate it a couple of times. */
1665 int retval = ERROR_OK;
1672 /* skip command character */
1675 offset = strtoul(packet, &separator, 16);
1676 length = strtoul(separator + 1, &separator, 16);
1678 xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
1681 sort banks in ascending order, we need to make non-flash memory be ram(or rather
1682 read/write) by default for GDB.
1683 GDB does not have a concept of non-cacheable read/write memory.
1685 flash_bank_t **banks=malloc(sizeof(flash_bank_t *)*flash_get_bank_count());
1688 for (i=0; i<flash_get_bank_count(); i++)
1690 p = get_flash_bank_by_num(i);
1694 retval = ERROR_FAIL;
1695 gdb_send_error(connection, retval);
1701 qsort(banks, flash_get_bank_count(), sizeof(flash_bank_t *), compare_bank);
1704 for (i=0; i<flash_get_bank_count(); i++)
1708 if (ram_start<p->base)
1710 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
1711 ram_start, p->base-ram_start);
1714 /* if device has uneven sector sizes, eg. str7, lpc
1715 * we pass the smallest sector size to gdb memory map */
1716 blocksize = gdb_calc_blocksize(p);
1718 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" start=\"0x%x\" length=\"0x%x\">\n" \
1719 "<property name=\"blocksize\">0x%x</property>\n" \
1721 p->base, p->size, blocksize);
1722 ram_start=p->base+p->size;
1726 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
1727 ram_start, 0-ram_start);
1730 /* a flash chip could be at the very end of the 32 bit address space, in which case
1731 ram_start will be precisely 0 */
1737 xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
1739 if (retval != ERROR_OK)
1741 gdb_send_error(connection, retval);
1745 if (offset + length > pos)
1747 length = pos - offset;
1750 char *t = malloc(length + 1);
1752 memcpy(t + 1, xml + offset, length);
1753 gdb_put_packet(connection, t, length + 1);
1759 else if (strstr(packet, "qXfer:features:read:"))
1764 int retval = ERROR_OK;
1767 unsigned int length;
1770 /* skip command character */
1773 if (decode_xfer_read(packet, &annex, &offset, &length) < 0)
1775 gdb_send_error(connection, 01);
1779 if (strcmp(annex, "target.xml") != 0)
1781 gdb_send_error(connection, 01);
1785 xml_printf(&retval, &xml, &pos, &size, \
1786 "l<target version=\"1.0\">\n<architecture>arm</architecture>\n</target>\n");
1788 if (retval != ERROR_OK)
1790 gdb_send_error(connection, retval);
1794 gdb_put_packet(connection, xml, strlen(xml));
1799 else if (strstr(packet, "QStartNoAckMode"))
1801 gdb_connection->noack_mode = 1;
1802 gdb_put_packet(connection, "OK", 2);
1806 gdb_put_packet(connection, "", 0);
1810 int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1812 gdb_connection_t *gdb_connection = connection->priv;
1813 gdb_service_t *gdb_service = connection->service->priv;
1816 /* if flash programming disabled - send a empty reply */
1818 if (gdb_flash_program == 0)
1820 gdb_put_packet(connection, "", 0);
1824 if (strstr(packet, "vFlashErase:"))
1827 unsigned long length;
1829 char *parse = packet + 12;
1832 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1833 return ERROR_SERVER_REMOTE_CLOSED;
1836 addr = strtoul(parse, &parse, 16);
1838 if (*(parse++) != ',' || *parse == '\0')
1840 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1841 return ERROR_SERVER_REMOTE_CLOSED;
1844 length = strtoul(parse, &parse, 16);
1848 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1849 return ERROR_SERVER_REMOTE_CLOSED;
1852 /* assume all sectors need erasing - stops any problems
1853 * when flash_write is called multiple times */
1856 /* perform any target specific operations before the erase */
1857 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_START);
1858 result = flash_erase_address_range(gdb_service->target, addr, length );
1859 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_END);
1862 if (result != ERROR_OK)
1864 /* GDB doesn't evaluate the actual error number returned,
1865 * treat a failed erase as an I/O error
1867 gdb_send_error(connection, EIO);
1868 LOG_ERROR("flash_erase returned %i", result);
1871 gdb_put_packet(connection, "OK", 2);
1876 if (strstr(packet, "vFlashWrite:"))
1880 unsigned long length;
1881 char *parse = packet + 12;
1885 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1886 return ERROR_SERVER_REMOTE_CLOSED;
1888 addr = strtoul(parse, &parse, 16);
1889 if (*(parse++) != ':')
1891 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1892 return ERROR_SERVER_REMOTE_CLOSED;
1894 length = packet_size - (parse - packet);
1896 /* create a new image if there isn't already one */
1897 if (gdb_connection->vflash_image == NULL)
1899 gdb_connection->vflash_image = malloc(sizeof(image_t));
1900 image_open(gdb_connection->vflash_image, "", "build");
1903 /* create new section with content from packet buffer */
1904 if((retval = image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (u8*)parse)) != ERROR_OK)
1909 gdb_put_packet(connection, "OK", 2);
1914 if (!strcmp(packet, "vFlashDone"))
1918 /* process the flashing buffer. No need to erase as GDB
1919 * always issues a vFlashErase first. */
1920 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_START);
1921 result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0);
1922 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_END);
1923 if ( result != ERROR_OK)
1925 if (result == ERROR_FLASH_DST_OUT_OF_BANK)
1926 gdb_put_packet(connection, "E.memtype", 9);
1928 gdb_send_error(connection, EIO);
1932 LOG_DEBUG("wrote %u bytes from vFlash image to flash", written);
1933 gdb_put_packet(connection, "OK", 2);
1936 image_close(gdb_connection->vflash_image);
1937 free(gdb_connection->vflash_image);
1938 gdb_connection->vflash_image = NULL;
1943 gdb_put_packet(connection, "", 0);
1947 int gdb_detach(connection_t *connection, target_t *target)
1950 switch( detach_mode )
1952 case GDB_DETACH_RESUME:
1953 target_handle_event( target, TARGET_EVENT_OLD_pre_resume );
1954 target_resume(target, 1, 0, 1, 0);
1957 case GDB_DETACH_RESET:
1958 /* FIX?? make this configurable?? */
1959 target_process_reset(connection->cmd_ctx, RESET_HALT);
1962 case GDB_DETACH_HALT:
1963 target_halt(target);
1966 case GDB_DETACH_NOTHING:
1970 gdb_put_packet(connection, "OK", 2);
1974 static void gdb_log_callback(void *priv, const char *file, int line,
1975 const char *function, const char *string)
1977 connection_t *connection = priv;
1978 gdb_connection_t *gdb_con = connection->priv;
1982 /* do not reply this using the O packet */
1986 gdb_output_con(connection, string);
1989 /* Do not allocate this on the stack */
1990 char gdb_packet_buffer[GDB_BUFFER_SIZE];
1992 static void gdb_sig_halted(connection_t *connection)
1995 snprintf(sig_reply, 4, "T%2.2x", 2);
1996 gdb_put_packet(connection, sig_reply, 3);
2000 int gdb_input_inner(connection_t *connection)
2002 gdb_service_t *gdb_service = connection->service->priv;
2003 target_t *target = gdb_service->target;
2004 char *packet=gdb_packet_buffer;
2007 gdb_connection_t *gdb_con = connection->priv;
2008 static int extended_protocol = 0;
2010 /* drain input buffer */
2013 packet_size = GDB_BUFFER_SIZE-1;
2014 if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)
2019 /* terminate with zero */
2020 packet[packet_size] = 0;
2022 if( LOG_LEVEL_IS( LOG_LVL_DEBUG ) ){
2023 if( packet[0] == 'X' ){
2024 // binary packets spew junk into the debug log stream
2027 for( x = 0 ; (x < 49) && (packet[x] != ':') ; x++ ){
2031 LOG_DEBUG("received packet: '%s:<binary-data>'", buf );
2033 LOG_DEBUG("received packet: '%s'", packet );
2037 if (packet_size > 0)
2043 /* Hct... -- set thread
2044 * we don't have threads, send empty reply */
2045 gdb_put_packet(connection, NULL, 0);
2049 retval = gdb_query_packet(connection, target, packet, packet_size);
2052 retval = gdb_get_registers_packet(connection, target, packet, packet_size);
2055 retval = gdb_set_registers_packet(connection, target, packet, packet_size);
2058 retval = gdb_get_register_packet(connection, target, packet, packet_size);
2061 retval = gdb_set_register_packet(connection, target, packet, packet_size);
2064 retval = gdb_read_memory_packet(connection, target, packet, packet_size);
2067 retval = gdb_write_memory_packet(connection, target, packet, packet_size);
2071 retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
2074 gdb_last_signal_packet(connection, target, packet, packet_size);
2079 if (target->state != TARGET_HALTED)
2081 /* If the target isn't in the halted state, then we can't
2082 * step/continue. This might be early setup, etc.
2084 gdb_sig_halted(connection);
2087 /* We're running/stepping, in which case we can
2088 * forward log output until the target is halted
2090 gdb_connection_t *gdb_con = connection->priv;
2091 gdb_con->frontend_state = TARGET_RUNNING;
2092 log_add_callback(gdb_log_callback, connection);
2093 target_call_event_callbacks(target, TARGET_EVENT_GDB_START);
2094 int retval=gdb_step_continue_packet(connection, target, packet, packet_size);
2095 if (retval!=ERROR_OK)
2097 /* we'll never receive a halted condition... issue a false one.. */
2098 gdb_frontend_halted(target, connection);
2104 retval = gdb_v_packet(connection, target, packet, packet_size);
2107 retval = gdb_detach(connection, target);
2108 extended_protocol = 0;
2111 if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)
2115 if (extended_protocol != 0)
2117 gdb_put_packet(connection, "OK", 2);
2118 return ERROR_SERVER_REMOTE_CLOSED;
2120 /* handle extended remote protocol */
2121 extended_protocol = 1;
2122 gdb_put_packet(connection, "OK", 2);
2125 /* handle extended restart packet */
2126 breakpoint_clear_target(gdb_service->target);
2127 watchpoint_clear_target(gdb_service->target);
2128 command_run_linef(connection->cmd_ctx, "ocd_gdb_restart %d", get_num_by_target(target));
2131 /* ignore unkown packets */
2132 LOG_DEBUG("ignoring 0x%2.2x packet", packet[0]);
2133 gdb_put_packet(connection, NULL, 0);
2137 /* if a packet handler returned an error, exit input loop */
2138 if (retval != ERROR_OK)
2142 if (gdb_con->ctrl_c)
2144 if (target->state == TARGET_RUNNING)
2146 target_halt(target);
2147 gdb_con->ctrl_c = 0;
2151 } while (gdb_con->buf_cnt > 0);
2156 int gdb_input(connection_t *connection)
2158 int retval = gdb_input_inner(connection);
2159 gdb_connection_t *gdb_con = connection->priv;
2160 if (retval == ERROR_SERVER_REMOTE_CLOSED)
2163 /* logging does not propagate the error, yet can set th gdb_con->closed flag */
2164 if (gdb_con->closed)
2165 return ERROR_SERVER_REMOTE_CLOSED;
2167 /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
2173 gdb_service_t *gdb_service;
2174 target_t *target = all_targets;
2178 LOG_WARNING("no gdb ports allocated as no target has been specified");
2184 LOG_WARNING("no gdb port specified, using default port 3333");
2190 char service_name[8];
2192 snprintf(service_name, 8, "gdb-%2.2i", target->target_number);
2194 gdb_service = malloc(sizeof(gdb_service_t));
2195 gdb_service->target = target;
2197 add_service("gdb", CONNECTION_GDB,
2198 gdb_port + target->target_number,
2199 1, gdb_new_connection, gdb_input,
2200 gdb_connection_closed,
2203 LOG_DEBUG("gdb service for target %s at port %i",
2205 gdb_port + target->target_number);
2207 target = target->next;
2213 /* daemon configuration command gdb_port */
2214 int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2218 command_print(cmd_ctx, "%d", gdb_port);
2222 /* only if the port wasn't overwritten by cmdline */
2224 gdb_port = strtoul(args[0], NULL, 0);
2229 int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2233 if (strcmp(args[0], "resume") == 0)
2235 detach_mode = GDB_DETACH_RESUME;
2238 else if (strcmp(args[0], "reset") == 0)
2240 detach_mode = GDB_DETACH_RESET;
2243 else if (strcmp(args[0], "halt") == 0)
2245 detach_mode = GDB_DETACH_HALT;
2248 else if (strcmp(args[0], "nothing") == 0)
2250 detach_mode = GDB_DETACH_NOTHING;
2254 LOG_WARNING("invalid gdb_detach configuration directive: %s", args[0]);
2257 return ERROR_COMMAND_SYNTAX_ERROR;
2260 int handle_gdb_memory_map_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2264 if (strcmp(args[0], "enable") == 0)
2266 gdb_use_memory_map = 1;
2269 else if (strcmp(args[0], "disable") == 0)
2271 gdb_use_memory_map = 0;
2275 LOG_WARNING("invalid gdb_memory_map configuration directive %s", args[0]);
2278 return ERROR_COMMAND_SYNTAX_ERROR;
2281 int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2285 if (strcmp(args[0], "enable") == 0)
2287 gdb_flash_program = 1;
2290 else if (strcmp(args[0], "disable") == 0)
2292 gdb_flash_program = 0;
2296 LOG_WARNING("invalid gdb_flash_program configuration directive: %s", args[0]);
2299 return ERROR_COMMAND_SYNTAX_ERROR;
2302 int handle_gdb_report_data_abort_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2306 if (strcmp(args[0], "enable") == 0)
2308 gdb_report_data_abort = 1;
2311 else if (strcmp(args[0], "disable") == 0)
2313 gdb_report_data_abort = 0;
2317 LOG_WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]);
2320 return ERROR_COMMAND_SYNTAX_ERROR;
2323 /* gdb_breakpoint_override */
2324 int handle_gdb_breakpoint_override_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2331 gdb_breakpoint_override = 1;
2332 if (strcmp(args[0], "hard")==0)
2334 gdb_breakpoint_override_type=BKPT_HARD;
2335 } else if (strcmp(args[0], "soft")==0)
2337 gdb_breakpoint_override_type=BKPT_SOFT;
2338 } else if (strcmp(args[0], "disable") == 0)
2340 gdb_breakpoint_override = 0;
2344 return ERROR_COMMAND_SYNTAX_ERROR;
2346 if (gdb_breakpoint_override)
2348 LOG_USER("force %s breakpoints", (gdb_breakpoint_override_type==BKPT_HARD)?"hard":"soft");
2351 LOG_USER("breakpoint type is not overriden");
2358 int gdb_register_commands(command_context_t *command_context)
2360 register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
2361 COMMAND_CONFIG, "daemon configuration command gdb_port");
2362 register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,
2363 COMMAND_CONFIG, "");
2364 register_command(command_context, NULL, "gdb_memory_map", handle_gdb_memory_map_command,
2365 COMMAND_CONFIG, "enable or disable memory map");
2366 register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,
2367 COMMAND_CONFIG, "enable or disable flash program");
2368 register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command,
2369 COMMAND_CONFIG, "enable or disable report data");
2370 register_command(command_context, NULL, "gdb_breakpoint_override", handle_gdb_breakpoint_override_command,
2371 COMMAND_EXEC, "hard/soft/disabled - force breakpoint type for gdb 'break' commands."
2372 "The raison d'etre for this option is to support GDB GUI's without "
2373 "a hard/soft breakpoint concept where the default OpenOCD behaviour "
2374 "is not sufficient");