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, see <http://www.gnu.org/licenses/>. *
35 ***************************************************************************/
41 #include <target/breakpoints.h>
42 #include <target/target_request.h>
43 #include <target/register.h>
44 #include <target/target.h>
45 #include <target/target_type.h>
46 #include <target/semihosting_common.h>
48 #include <flash/nor/core.h>
49 #include "gdb_server.h"
50 #include <target/image.h>
51 #include <jtag/jtag.h>
52 #include "rtos/rtos.h"
53 #include "target/smp.h"
57 * GDB server implementation.
59 * This implements the GDB Remote Serial Protocol, over TCP connections,
60 * giving GDB access to the JTAG or other hardware debugging facilities
61 * found in most modern embedded processors.
64 struct target_desc_format
{
66 uint32_t tdesc_length
;
69 /* private connection data for GDB */
70 struct gdb_connection
{
71 char buffer
[GDB_BUFFER_SIZE
+ 1]; /* Extra byte for null-termination */
75 enum target_state frontend_state
;
76 struct image
*vflash_image
;
80 /* set flag to true if you want the next stepi to return immediately.
81 * allowing GDB to pick up a fresh set of register values from the target
82 * without modifying the target state. */
84 /* We delay reporting memory write errors until next step/continue or memory
85 * write. This improves performance of gdb load significantly as the GDB packet
86 * can be replied immediately and a new GDB packet will be ready without delay
87 * (ca. 10% or so...). */
89 /* with extended-remote it seems we need to better emulate attach/detach.
90 * what this means is we reply with a W stop reply after a kill packet,
91 * normally we reply with a S reply via gdb_last_signal_packet.
92 * as a side note this behaviour only effects gdb > 6.8 */
94 /* set when extended protocol is used */
95 bool extended_protocol
;
96 /* temporarily used for target description support */
97 struct target_desc_format target_desc
;
98 /* temporarily used for thread list support */
103 #define _DEBUG_GDB_IO_
106 static struct gdb_connection
*current_gdb_connection
;
108 static int gdb_breakpoint_override
;
109 static enum breakpoint_type gdb_breakpoint_override_type
;
111 static int gdb_error(struct connection
*connection
, int retval
);
112 static char *gdb_port
;
113 static char *gdb_port_next
;
115 static void gdb_log_callback(void *priv
, const char *file
, unsigned line
,
116 const char *function
, const char *string
);
118 static void gdb_sig_halted(struct connection
*connection
);
120 /* number of gdb connections, mainly to suppress gdb related debugging spam
121 * in helper/log.c when no gdb connections are actually active */
122 int gdb_actual_connections
;
124 /* set if we are sending a memory map to gdb
125 * via qXfer:memory-map:read packet */
126 /* enabled by default*/
127 static int gdb_use_memory_map
= 1;
128 /* enabled by default*/
129 static int gdb_flash_program
= 1;
131 /* if set, data aborts cause an error to be reported in memory read packets
132 * see the code in gdb_read_memory_packet() for further explanations.
133 * Disabled by default.
135 static int gdb_report_data_abort
;
136 /* If set, errors when accessing registers are reported to gdb. Disabled by
138 static int gdb_report_register_access_error
;
140 /* set if we are sending target descriptions to gdb
141 * via qXfer:features:read packet */
142 /* enabled by default */
143 static int gdb_use_target_description
= 1;
145 /* current processing free-run type, used by file-I/O */
146 static char gdb_running_type
;
148 static int gdb_last_signal(struct target
*target
)
150 switch (target
->debug_reason
) {
151 case DBG_REASON_DBGRQ
:
152 return 0x2; /* SIGINT */
153 case DBG_REASON_BREAKPOINT
:
154 case DBG_REASON_WATCHPOINT
:
155 case DBG_REASON_WPTANDBKPT
:
156 return 0x05; /* SIGTRAP */
157 case DBG_REASON_SINGLESTEP
:
158 return 0x05; /* SIGTRAP */
159 case DBG_REASON_EXC_CATCH
:
161 case DBG_REASON_NOTHALTED
:
162 return 0x0; /* no signal... shouldn't happen */
164 LOG_USER("undefined debug reason %d - target needs reset",
165 target
->debug_reason
);
170 static int check_pending(struct connection
*connection
,
171 int timeout_s
, int *got_data
)
173 /* a non-blocking socket will block if there is 0 bytes available on the socket,
174 * but return with as many bytes as are available immediately
178 struct gdb_connection
*gdb_con
= connection
->priv
;
180 if (got_data
== NULL
)
184 if (gdb_con
->buf_cnt
> 0) {
190 FD_SET(connection
->fd
, &read_fds
);
192 tv
.tv_sec
= timeout_s
;
194 if (socket_select(connection
->fd
+ 1, &read_fds
, NULL
, NULL
, &tv
) == 0) {
195 /* This can typically be because a "monitor" command took too long
196 * before printing any progress messages
199 return ERROR_GDB_TIMEOUT
;
203 *got_data
= FD_ISSET(connection
->fd
, &read_fds
) != 0;
207 static int gdb_get_char_inner(struct connection
*connection
, int *next_char
)
209 struct gdb_connection
*gdb_con
= connection
->priv
;
210 int retval
= ERROR_OK
;
212 #ifdef _DEBUG_GDB_IO_
216 if (connection
->service
->type
!= CONNECTION_TCP
)
217 gdb_con
->buf_cnt
= read(connection
->fd
, gdb_con
->buffer
, GDB_BUFFER_SIZE
);
219 retval
= check_pending(connection
, 1, NULL
);
220 if (retval
!= ERROR_OK
)
222 gdb_con
->buf_cnt
= read_socket(connection
->fd
,
227 if (gdb_con
->buf_cnt
> 0)
229 if (gdb_con
->buf_cnt
== 0) {
230 gdb_con
->closed
= true;
231 return ERROR_SERVER_REMOTE_CLOSED
;
235 errno
= WSAGetLastError();
241 case WSAECONNABORTED
:
242 gdb_con
->closed
= true;
243 return ERROR_SERVER_REMOTE_CLOSED
;
245 gdb_con
->closed
= true;
246 return ERROR_SERVER_REMOTE_CLOSED
;
248 LOG_ERROR("read: %d", errno
);
257 gdb_con
->closed
= true;
258 return ERROR_SERVER_REMOTE_CLOSED
;
260 gdb_con
->closed
= true;
261 return ERROR_SERVER_REMOTE_CLOSED
;
263 LOG_ERROR("read: %s", strerror(errno
));
264 gdb_con
->closed
= true;
265 return ERROR_SERVER_REMOTE_CLOSED
;
270 #ifdef _DEBUG_GDB_IO_
271 debug_buffer
= strndup(gdb_con
->buffer
, gdb_con
->buf_cnt
);
272 LOG_DEBUG("received '%s'", debug_buffer
);
276 gdb_con
->buf_p
= gdb_con
->buffer
;
278 *next_char
= *(gdb_con
->buf_p
++);
279 if (gdb_con
->buf_cnt
> 0)
280 connection
->input_pending
= true;
282 connection
->input_pending
= false;
283 #ifdef _DEBUG_GDB_IO_
284 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char
, *next_char
);
291 * The cool thing about this fn is that it allows buf_p and buf_cnt to be
292 * held in registers in the inner loop.
294 * For small caches and embedded systems this is important!
296 static inline int gdb_get_char_fast(struct connection
*connection
,
297 int *next_char
, char **buf_p
, int *buf_cnt
)
299 int retval
= ERROR_OK
;
301 if ((*buf_cnt
)-- > 0) {
302 *next_char
= **buf_p
;
305 connection
->input_pending
= true;
307 connection
->input_pending
= false;
309 #ifdef _DEBUG_GDB_IO_
310 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char
, *next_char
);
316 struct gdb_connection
*gdb_con
= connection
->priv
;
317 gdb_con
->buf_p
= *buf_p
;
318 gdb_con
->buf_cnt
= *buf_cnt
;
319 retval
= gdb_get_char_inner(connection
, next_char
);
320 *buf_p
= gdb_con
->buf_p
;
321 *buf_cnt
= gdb_con
->buf_cnt
;
326 static int gdb_get_char(struct connection
*connection
, int *next_char
)
328 struct gdb_connection
*gdb_con
= connection
->priv
;
329 return gdb_get_char_fast(connection
, next_char
, &gdb_con
->buf_p
, &gdb_con
->buf_cnt
);
332 static int gdb_putback_char(struct connection
*connection
, int last_char
)
334 struct gdb_connection
*gdb_con
= connection
->priv
;
336 if (gdb_con
->buf_p
> gdb_con
->buffer
) {
337 *(--gdb_con
->buf_p
) = last_char
;
340 LOG_ERROR("BUG: couldn't put character back");
345 /* The only way we can detect that the socket is closed is the first time
346 * we write to it, we will fail. Subsequent write operations will
347 * succeed. Shudder! */
348 static int gdb_write(struct connection
*connection
, void *data
, int len
)
350 struct gdb_connection
*gdb_con
= connection
->priv
;
352 return ERROR_SERVER_REMOTE_CLOSED
;
354 if (connection_write(connection
, data
, len
) == len
)
356 gdb_con
->closed
= true;
357 return ERROR_SERVER_REMOTE_CLOSED
;
360 static void gdb_log_incoming_packet(char *packet
)
362 if (!LOG_LEVEL_IS(LOG_LVL_DEBUG
))
365 /* Avoid dumping non-printable characters to the terminal */
366 const unsigned packet_len
= strlen(packet
);
367 const char *nonprint
= find_nonprint_char(packet
, packet_len
);
369 /* Does packet at least have a prefix that is printable?
370 * Look within the first 50 chars of the packet. */
371 const char *colon
= memchr(packet
, ':', MIN(50, packet_len
));
372 const bool packet_has_prefix
= (colon
!= NULL
);
373 const bool packet_prefix_printable
= (packet_has_prefix
&& nonprint
> colon
);
375 if (packet_prefix_printable
) {
376 const unsigned int prefix_len
= colon
- packet
+ 1; /* + 1 to include the ':' */
377 const unsigned int payload_len
= packet_len
- prefix_len
;
378 LOG_DEBUG("received packet: %.*s<binary-data-%u-bytes>", prefix_len
, packet
, payload_len
);
380 LOG_DEBUG("received packet: <binary-data-%u-bytes>", packet_len
);
383 /* All chars printable, dump the packet as is */
384 LOG_DEBUG("received packet: %s", packet
);
388 static void gdb_log_outgoing_packet(char *packet_buf
, unsigned int packet_len
, unsigned char checksum
)
390 if (!LOG_LEVEL_IS(LOG_LVL_DEBUG
))
393 if (find_nonprint_char(packet_buf
, packet_len
))
394 LOG_DEBUG("sending packet: $<binary-data-%u-bytes>#%2.2x", packet_len
, checksum
);
396 LOG_DEBUG("sending packet: $%.*s#%2.2x'", packet_len
, packet_buf
, checksum
);
399 static int gdb_put_packet_inner(struct connection
*connection
,
400 char *buffer
, int len
)
403 unsigned char my_checksum
= 0;
406 struct gdb_connection
*gdb_con
= connection
->priv
;
408 for (i
= 0; i
< len
; i
++)
409 my_checksum
+= buffer
[i
];
411 #ifdef _DEBUG_GDB_IO_
413 * At this point we should have nothing in the input queue from GDB,
414 * however sometimes '-' is sent even though we've already received
415 * an ACK (+) for everything we've sent off.
419 retval
= check_pending(connection
, 0, &gotdata
);
420 if (retval
!= ERROR_OK
)
424 retval
= gdb_get_char(connection
, &reply
);
425 if (retval
!= ERROR_OK
)
428 /* fix a problem with some IAR tools */
429 gdb_putback_char(connection
, reply
);
430 LOG_DEBUG("Unexpected start of new packet");
434 LOG_WARNING("Discard unexpected char %c", reply
);
439 gdb_log_outgoing_packet(buffer
, len
, my_checksum
);
441 char local_buffer
[1024];
442 local_buffer
[0] = '$';
443 if ((size_t)len
+ 4 <= sizeof(local_buffer
)) {
444 /* performance gain on smaller packets by only a single call to gdb_write() */
445 memcpy(local_buffer
+ 1, buffer
, len
++);
446 len
+= snprintf(local_buffer
+ len
, sizeof(local_buffer
) - len
, "#%02x", my_checksum
);
447 retval
= gdb_write(connection
, local_buffer
, len
);
448 if (retval
!= ERROR_OK
)
451 /* larger packets are transmitted directly from caller supplied buffer
452 * by several calls to gdb_write() to avoid dynamic allocation */
453 snprintf(local_buffer
+ 1, sizeof(local_buffer
) - 1, "#%02x", my_checksum
);
454 retval
= gdb_write(connection
, local_buffer
, 1);
455 if (retval
!= ERROR_OK
)
457 retval
= gdb_write(connection
, buffer
, len
);
458 if (retval
!= ERROR_OK
)
460 retval
= gdb_write(connection
, local_buffer
+ 1, 3);
461 if (retval
!= ERROR_OK
)
465 if (gdb_con
->noack_mode
)
468 retval
= gdb_get_char(connection
, &reply
);
469 if (retval
!= ERROR_OK
)
474 else if (reply
== '-') {
475 /* Stop sending output packets for now */
476 log_remove_callback(gdb_log_callback
, connection
);
477 LOG_WARNING("negative reply, retrying");
478 } else if (reply
== 0x3) {
479 gdb_con
->ctrl_c
= true;
480 retval
= gdb_get_char(connection
, &reply
);
481 if (retval
!= ERROR_OK
)
485 else if (reply
== '-') {
486 /* Stop sending output packets for now */
487 log_remove_callback(gdb_log_callback
, connection
);
488 LOG_WARNING("negative reply, retrying");
489 } else if (reply
== '$') {
490 LOG_ERROR("GDB missing ack(1) - assumed good");
491 gdb_putback_char(connection
, reply
);
494 LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply
);
495 gdb_con
->closed
= true;
496 return ERROR_SERVER_REMOTE_CLOSED
;
498 } else if (reply
== '$') {
499 LOG_ERROR("GDB missing ack(2) - assumed good");
500 gdb_putback_char(connection
, reply
);
503 LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection",
505 gdb_con
->closed
= true;
506 return ERROR_SERVER_REMOTE_CLOSED
;
510 return ERROR_SERVER_REMOTE_CLOSED
;
515 int gdb_put_packet(struct connection
*connection
, char *buffer
, int len
)
517 struct gdb_connection
*gdb_con
= connection
->priv
;
518 gdb_con
->busy
= true;
519 int retval
= gdb_put_packet_inner(connection
, buffer
, len
);
520 gdb_con
->busy
= false;
522 /* we sent some data, reset timer for keep alive messages */
528 static inline int fetch_packet(struct connection
*connection
,
529 int *checksum_ok
, int noack
, int *len
, char *buffer
)
531 unsigned char my_checksum
= 0;
534 int retval
= ERROR_OK
;
536 struct gdb_connection
*gdb_con
= connection
->priv
;
541 /* move this over into local variables to use registers and give the
542 * more freedom to optimize */
543 char *buf_p
= gdb_con
->buf_p
;
544 int buf_cnt
= gdb_con
->buf_cnt
;
547 /* The common case is that we have an entire packet with no escape chars.
548 * We need to leave at least 2 bytes in the buffer to have
549 * gdb_get_char() update various bits and bobs correctly.
551 if ((buf_cnt
> 2) && ((buf_cnt
+ count
) < *len
)) {
552 /* The compiler will struggle a bit with constant propagation and
553 * aliasing, so we help it by showing that these values do not
554 * change inside the loop
558 int run
= buf_cnt
- 2;
564 if (character
== '#') {
565 /* Danger! character can be '#' when esc is
566 * used so we need an explicit boolean for done here. */
571 if (character
== '}') {
572 /* data transmitted in binary mode (X packet)
573 * uses 0x7d as escape character */
574 my_checksum
+= character
& 0xff;
577 my_checksum
+= character
& 0xff;
578 buffer
[count
++] = (character
^ 0x20) & 0xff;
580 my_checksum
+= character
& 0xff;
581 buffer
[count
++] = character
& 0xff;
590 LOG_ERROR("packet buffer too small");
591 retval
= ERROR_GDB_BUFFER_TOO_SMALL
;
595 retval
= gdb_get_char_fast(connection
, &character
, &buf_p
, &buf_cnt
);
596 if (retval
!= ERROR_OK
)
599 if (character
== '#')
602 if (character
== '}') {
603 /* data transmitted in binary mode (X packet)
604 * uses 0x7d as escape character */
605 my_checksum
+= character
& 0xff;
607 retval
= gdb_get_char_fast(connection
, &character
, &buf_p
, &buf_cnt
);
608 if (retval
!= ERROR_OK
)
611 my_checksum
+= character
& 0xff;
612 buffer
[count
++] = (character
^ 0x20) & 0xff;
614 my_checksum
+= character
& 0xff;
615 buffer
[count
++] = character
& 0xff;
619 gdb_con
->buf_p
= buf_p
;
620 gdb_con
->buf_cnt
= buf_cnt
;
622 if (retval
!= ERROR_OK
)
627 retval
= gdb_get_char(connection
, &character
);
628 if (retval
!= ERROR_OK
)
630 checksum
[0] = character
;
631 retval
= gdb_get_char(connection
, &character
);
632 if (retval
!= ERROR_OK
)
634 checksum
[1] = character
;
638 *checksum_ok
= (my_checksum
== strtoul(checksum
, NULL
, 16));
643 static int gdb_get_packet_inner(struct connection
*connection
,
644 char *buffer
, int *len
)
648 struct gdb_connection
*gdb_con
= connection
->priv
;
652 retval
= gdb_get_char(connection
, &character
);
653 if (retval
!= ERROR_OK
)
656 #ifdef _DEBUG_GDB_IO_
657 LOG_DEBUG("character: '%c'", character
);
664 /* According to the GDB documentation
665 * (https://sourceware.org/gdb/onlinedocs/gdb/Packet-Acknowledgment.html):
666 * "gdb sends a final `+` acknowledgment of the stub's `OK`
667 * response, which can be safely ignored by the stub."
668 * However OpenOCD server already is in noack mode at this
669 * point and instead of ignoring this it was emitting a
670 * warning. This code makes server ignore the first ACK
671 * that will be received after going into noack mode,
672 * warning only about subsequent ACK's. */
673 if (gdb_con
->noack_mode
> 1) {
674 LOG_WARNING("acknowledgment received, but no packet pending");
675 } else if (gdb_con
->noack_mode
) {
676 LOG_DEBUG("Received first acknowledgment after entering noack mode. Ignoring it.");
677 gdb_con
->noack_mode
= 2;
681 LOG_WARNING("negative acknowledgment, but no packet pending");
684 gdb_con
->ctrl_c
= true;
688 LOG_WARNING("ignoring character 0x%x", character
);
691 } while (character
!= '$');
694 /* explicit code expansion here to get faster inlined code in -O3 by not
695 * calculating checksum */
696 if (gdb_con
->noack_mode
) {
697 retval
= fetch_packet(connection
, &checksum_ok
, 1, len
, buffer
);
698 if (retval
!= ERROR_OK
)
701 retval
= fetch_packet(connection
, &checksum_ok
, 0, len
, buffer
);
702 if (retval
!= ERROR_OK
)
706 if (gdb_con
->noack_mode
) {
707 /* checksum is not checked in noack mode */
711 retval
= gdb_write(connection
, "+", 1);
712 if (retval
!= ERROR_OK
)
718 return ERROR_SERVER_REMOTE_CLOSED
;
723 static int gdb_get_packet(struct connection
*connection
, char *buffer
, int *len
)
725 struct gdb_connection
*gdb_con
= connection
->priv
;
726 gdb_con
->busy
= true;
727 int retval
= gdb_get_packet_inner(connection
, buffer
, len
);
728 gdb_con
->busy
= false;
732 static int gdb_output_con(struct connection
*connection
, const char *line
)
737 bin_size
= strlen(line
);
739 hex_buffer
= malloc(bin_size
* 2 + 2);
740 if (hex_buffer
== NULL
)
741 return ERROR_GDB_BUFFER_TOO_SMALL
;
744 size_t pkt_len
= hexify(hex_buffer
+ 1, (const uint8_t *)line
, bin_size
,
746 int retval
= gdb_put_packet(connection
, hex_buffer
, pkt_len
+ 1);
752 static int gdb_output(struct command_context
*context
, const char *line
)
754 /* this will be dumped to the log and also sent as an O packet if possible */
755 LOG_USER_N("%s", line
);
759 static void gdb_signal_reply(struct target
*target
, struct connection
*connection
)
761 struct gdb_connection
*gdb_connection
= connection
->priv
;
763 char stop_reason
[32];
764 char current_thread
[25];
768 rtos_update_threads(target
);
770 if (target
->debug_reason
== DBG_REASON_EXIT
) {
771 sig_reply_len
= snprintf(sig_reply
, sizeof(sig_reply
), "W00");
774 if (target
->rtos
!= NULL
) {
775 target
->rtos
->current_threadid
= target
->rtos
->current_thread
;
776 target
->rtos
->gdb_target_for_threadid(connection
, target
->rtos
->current_threadid
, &ct
);
781 if (gdb_connection
->ctrl_c
) {
784 signal_var
= gdb_last_signal(ct
);
786 stop_reason
[0] = '\0';
787 if (ct
->debug_reason
== DBG_REASON_WATCHPOINT
) {
788 enum watchpoint_rw hit_wp_type
;
789 target_addr_t hit_wp_address
;
791 if (watchpoint_hit(ct
, &hit_wp_type
, &hit_wp_address
) == ERROR_OK
) {
793 switch (hit_wp_type
) {
795 snprintf(stop_reason
, sizeof(stop_reason
),
796 "watch:%08" TARGET_PRIxADDR
";", hit_wp_address
);
799 snprintf(stop_reason
, sizeof(stop_reason
),
800 "rwatch:%08" TARGET_PRIxADDR
";", hit_wp_address
);
803 snprintf(stop_reason
, sizeof(stop_reason
),
804 "awatch:%08" TARGET_PRIxADDR
";", hit_wp_address
);
812 current_thread
[0] = '\0';
813 if (target
->rtos
!= NULL
)
814 snprintf(current_thread
, sizeof(current_thread
), "thread:%" PRIx64
";",
815 target
->rtos
->current_thread
);
817 sig_reply_len
= snprintf(sig_reply
, sizeof(sig_reply
), "T%2.2x%s%s",
818 signal_var
, stop_reason
, current_thread
);
820 gdb_connection
->ctrl_c
= false;
823 gdb_put_packet(connection
, sig_reply
, sig_reply_len
);
824 gdb_connection
->frontend_state
= TARGET_HALTED
;
827 static void gdb_fileio_reply(struct target
*target
, struct connection
*connection
)
829 struct gdb_connection
*gdb_connection
= connection
->priv
;
830 char fileio_command
[256];
832 bool program_exited
= false;
834 if (strcmp(target
->fileio_info
->identifier
, "open") == 0)
835 sprintf(fileio_command
, "F%s,%" PRIx64
"/%" PRIx64
",%" PRIx64
",%" PRIx64
, target
->fileio_info
->identifier
,
836 target
->fileio_info
->param_1
,
837 target
->fileio_info
->param_2
+ 1, /* len + trailing zero */
838 target
->fileio_info
->param_3
,
839 target
->fileio_info
->param_4
);
840 else if (strcmp(target
->fileio_info
->identifier
, "close") == 0)
841 sprintf(fileio_command
, "F%s,%" PRIx64
, target
->fileio_info
->identifier
,
842 target
->fileio_info
->param_1
);
843 else if (strcmp(target
->fileio_info
->identifier
, "read") == 0)
844 sprintf(fileio_command
, "F%s,%" PRIx64
",%" PRIx64
",%" PRIx64
, target
->fileio_info
->identifier
,
845 target
->fileio_info
->param_1
,
846 target
->fileio_info
->param_2
,
847 target
->fileio_info
->param_3
);
848 else if (strcmp(target
->fileio_info
->identifier
, "write") == 0)
849 sprintf(fileio_command
, "F%s,%" PRIx64
",%" PRIx64
",%" PRIx64
, target
->fileio_info
->identifier
,
850 target
->fileio_info
->param_1
,
851 target
->fileio_info
->param_2
,
852 target
->fileio_info
->param_3
);
853 else if (strcmp(target
->fileio_info
->identifier
, "lseek") == 0)
854 sprintf(fileio_command
, "F%s,%" PRIx64
",%" PRIx64
",%" PRIx64
, target
->fileio_info
->identifier
,
855 target
->fileio_info
->param_1
,
856 target
->fileio_info
->param_2
,
857 target
->fileio_info
->param_3
);
858 else if (strcmp(target
->fileio_info
->identifier
, "rename") == 0)
859 sprintf(fileio_command
, "F%s,%" PRIx64
"/%" PRIx64
",%" PRIx64
"/%" PRIx64
, target
->fileio_info
->identifier
,
860 target
->fileio_info
->param_1
,
861 target
->fileio_info
->param_2
+ 1, /* len + trailing zero */
862 target
->fileio_info
->param_3
,
863 target
->fileio_info
->param_4
+ 1); /* len + trailing zero */
864 else if (strcmp(target
->fileio_info
->identifier
, "unlink") == 0)
865 sprintf(fileio_command
, "F%s,%" PRIx64
"/%" PRIx64
, target
->fileio_info
->identifier
,
866 target
->fileio_info
->param_1
,
867 target
->fileio_info
->param_2
+ 1); /* len + trailing zero */
868 else if (strcmp(target
->fileio_info
->identifier
, "stat") == 0)
869 sprintf(fileio_command
, "F%s,%" PRIx64
"/%" PRIx64
",%" PRIx64
, target
->fileio_info
->identifier
,
870 target
->fileio_info
->param_1
,
871 target
->fileio_info
->param_2
,
872 target
->fileio_info
->param_3
);
873 else if (strcmp(target
->fileio_info
->identifier
, "fstat") == 0)
874 sprintf(fileio_command
, "F%s,%" PRIx64
",%" PRIx64
, target
->fileio_info
->identifier
,
875 target
->fileio_info
->param_1
,
876 target
->fileio_info
->param_2
);
877 else if (strcmp(target
->fileio_info
->identifier
, "gettimeofday") == 0)
878 sprintf(fileio_command
, "F%s,%" PRIx64
",%" PRIx64
, target
->fileio_info
->identifier
,
879 target
->fileio_info
->param_1
,
880 target
->fileio_info
->param_2
);
881 else if (strcmp(target
->fileio_info
->identifier
, "isatty") == 0)
882 sprintf(fileio_command
, "F%s,%" PRIx64
, target
->fileio_info
->identifier
,
883 target
->fileio_info
->param_1
);
884 else if (strcmp(target
->fileio_info
->identifier
, "system") == 0)
885 sprintf(fileio_command
, "F%s,%" PRIx64
"/%" PRIx64
, target
->fileio_info
->identifier
,
886 target
->fileio_info
->param_1
,
887 target
->fileio_info
->param_2
+ 1); /* len + trailing zero */
888 else if (strcmp(target
->fileio_info
->identifier
, "exit") == 0) {
889 /* If target hits exit syscall, report to GDB the program is terminated.
890 * In addition, let target run its own exit syscall handler. */
891 program_exited
= true;
892 sprintf(fileio_command
, "W%02" PRIx64
, target
->fileio_info
->param_1
);
894 LOG_DEBUG("Unknown syscall: %s", target
->fileio_info
->identifier
);
896 /* encounter unknown syscall, continue */
897 gdb_connection
->frontend_state
= TARGET_RUNNING
;
898 target_resume(target
, 1, 0x0, 0, 0);
902 command_len
= strlen(fileio_command
);
903 gdb_put_packet(connection
, fileio_command
, command_len
);
905 if (program_exited
) {
906 /* Use target_resume() to let target run its own exit syscall handler. */
907 gdb_connection
->frontend_state
= TARGET_RUNNING
;
908 target_resume(target
, 1, 0x0, 0, 0);
910 gdb_connection
->frontend_state
= TARGET_HALTED
;
911 rtos_update_threads(target
);
915 static void gdb_frontend_halted(struct target
*target
, struct connection
*connection
)
917 struct gdb_connection
*gdb_connection
= connection
->priv
;
919 /* In the GDB protocol when we are stepping or continuing execution,
920 * we have a lingering reply. Upon receiving a halted event
921 * when we have that lingering packet, we reply to the original
922 * step or continue packet.
924 * Executing monitor commands can bring the target in and
925 * out of the running state so we'll see lots of TARGET_EVENT_XXX
926 * that are to be ignored.
928 if (gdb_connection
->frontend_state
== TARGET_RUNNING
) {
929 /* stop forwarding log packets! */
930 log_remove_callback(gdb_log_callback
, connection
);
932 /* check fileio first */
933 if (target_get_gdb_fileio_info(target
, target
->fileio_info
) == ERROR_OK
)
934 gdb_fileio_reply(target
, connection
);
936 gdb_signal_reply(target
, connection
);
940 static int gdb_target_callback_event_handler(struct target
*target
,
941 enum target_event event
, void *priv
)
943 struct connection
*connection
= priv
;
944 struct gdb_service
*gdb_service
= connection
->service
->priv
;
946 if (gdb_service
->target
!= target
)
950 case TARGET_EVENT_GDB_HALT
:
951 gdb_frontend_halted(target
, connection
);
953 case TARGET_EVENT_HALTED
:
954 target_call_event_callbacks(target
, TARGET_EVENT_GDB_END
);
963 static int gdb_new_connection(struct connection
*connection
)
965 struct gdb_connection
*gdb_connection
= malloc(sizeof(struct gdb_connection
));
966 struct target
*target
;
970 target
= get_target_from_connection(connection
);
971 connection
->priv
= gdb_connection
;
972 connection
->cmd_ctx
->current_target
= target
;
974 /* initialize gdb connection information */
975 gdb_connection
->buf_p
= gdb_connection
->buffer
;
976 gdb_connection
->buf_cnt
= 0;
977 gdb_connection
->ctrl_c
= false;
978 gdb_connection
->frontend_state
= TARGET_HALTED
;
979 gdb_connection
->vflash_image
= NULL
;
980 gdb_connection
->closed
= false;
981 gdb_connection
->busy
= false;
982 gdb_connection
->noack_mode
= 0;
983 gdb_connection
->sync
= false;
984 gdb_connection
->mem_write_error
= false;
985 gdb_connection
->attached
= true;
986 gdb_connection
->extended_protocol
= false;
987 gdb_connection
->target_desc
.tdesc
= NULL
;
988 gdb_connection
->target_desc
.tdesc_length
= 0;
989 gdb_connection
->thread_list
= NULL
;
991 /* send ACK to GDB for debug request */
992 gdb_write(connection
, "+", 1);
994 /* output goes through gdb connection */
995 command_set_output_handler(connection
->cmd_ctx
, gdb_output
, connection
);
997 /* we must remove all breakpoints registered to the target as a previous
998 * GDB session could leave dangling breakpoints if e.g. communication
1001 breakpoint_clear_target(target
);
1002 watchpoint_clear_target(target
);
1004 /* remove the initial ACK from the incoming buffer */
1005 retval
= gdb_get_char(connection
, &initial_ack
);
1006 if (retval
!= ERROR_OK
)
1009 /* FIX!!!??? would we actually ever receive a + here???
1012 if (initial_ack
!= '+')
1013 gdb_putback_char(connection
, initial_ack
);
1014 target_call_event_callbacks(target
, TARGET_EVENT_GDB_ATTACH
);
1017 /* clean previous rtos session if supported*/
1018 if (target
->rtos
->type
->clean
)
1019 target
->rtos
->type
->clean(target
);
1021 /* update threads */
1022 rtos_update_threads(target
);
1025 if (gdb_use_memory_map
) {
1026 /* Connect must fail if the memory map can't be set up correctly.
1028 * This will cause an auto_probe to be invoked, which is either
1029 * a no-op or it will fail when the target isn't ready(e.g. not halted).
1031 for (unsigned int i
= 0; i
< flash_get_bank_count(); i
++) {
1032 struct flash_bank
*p
;
1033 p
= get_flash_bank_by_num_noprobe(i
);
1034 if (p
->target
!= target
)
1036 retval
= get_flash_bank_by_num(i
, &p
);
1037 if (retval
!= ERROR_OK
) {
1038 LOG_ERROR("Connect failed. Consider setting up a gdb-attach event for the target "
1039 "to prepare target for GDB connect, or use 'gdb_memory_map disable'.");
1045 gdb_actual_connections
++;
1046 log_printf_lf(all_targets
->next
!= NULL
? LOG_LVL_INFO
: LOG_LVL_DEBUG
,
1047 __FILE__
, __LINE__
, __func__
,
1048 "New GDB Connection: %d, Target %s, state: %s",
1049 gdb_actual_connections
,
1050 target_name(target
),
1051 target_state_name(target
));
1053 if (!target_was_examined(target
)) {
1054 LOG_ERROR("Target %s not examined yet, refuse gdb connection %d!",
1055 target_name(target
), gdb_actual_connections
);
1056 gdb_actual_connections
--;
1057 return ERROR_TARGET_NOT_EXAMINED
;
1060 if (target
->state
!= TARGET_HALTED
)
1061 LOG_WARNING("GDB connection %d on target %s not halted",
1062 gdb_actual_connections
, target_name(target
));
1064 /* DANGER! If we fail subsequently, we must remove this handler,
1065 * otherwise we occasionally see crashes as the timer can invoke the
1068 * register callback to be informed about target events */
1069 target_register_event_callback(gdb_target_callback_event_handler
, connection
);
1074 static int gdb_connection_closed(struct connection
*connection
)
1076 struct target
*target
;
1077 struct gdb_connection
*gdb_connection
= connection
->priv
;
1079 target
= get_target_from_connection(connection
);
1081 /* we're done forwarding messages. Tear down callback before
1082 * cleaning up connection.
1084 log_remove_callback(gdb_log_callback
, connection
);
1086 gdb_actual_connections
--;
1087 LOG_DEBUG("GDB Close, Target: %s, state: %s, gdb_actual_connections=%d",
1088 target_name(target
),
1089 target_state_name(target
),
1090 gdb_actual_connections
);
1092 /* see if an image built with vFlash commands is left */
1093 if (gdb_connection
->vflash_image
) {
1094 image_close(gdb_connection
->vflash_image
);
1095 free(gdb_connection
->vflash_image
);
1096 gdb_connection
->vflash_image
= NULL
;
1099 /* if this connection registered a debug-message receiver delete it */
1100 delete_debug_msg_receiver(connection
->cmd_ctx
, target
);
1102 free(connection
->priv
);
1103 connection
->priv
= NULL
;
1105 target_unregister_event_callback(gdb_target_callback_event_handler
, connection
);
1107 target_call_event_callbacks(target
, TARGET_EVENT_GDB_END
);
1109 target_call_event_callbacks(target
, TARGET_EVENT_GDB_DETACH
);
1114 static void gdb_send_error(struct connection
*connection
, uint8_t the_error
)
1117 snprintf(err
, 4, "E%2.2X", the_error
);
1118 gdb_put_packet(connection
, err
, 3);
1121 static int gdb_last_signal_packet(struct connection
*connection
,
1122 char const *packet
, int packet_size
)
1124 struct target
*target
= get_target_from_connection(connection
);
1125 struct gdb_connection
*gdb_con
= connection
->priv
;
1129 if (!gdb_con
->attached
) {
1130 /* if we are here we have received a kill packet
1131 * reply W stop reply otherwise gdb gets very unhappy */
1132 gdb_put_packet(connection
, "W00", 3);
1136 signal_var
= gdb_last_signal(target
);
1138 snprintf(sig_reply
, 4, "S%2.2x", signal_var
);
1139 gdb_put_packet(connection
, sig_reply
, 3);
1144 static inline int gdb_reg_pos(struct target
*target
, int pos
, int len
)
1146 if (target
->endianness
== TARGET_LITTLE_ENDIAN
)
1149 return len
- 1 - pos
;
1152 /* Convert register to string of bytes. NB! The # of bits in the
1153 * register might be non-divisible by 8(a byte), in which
1154 * case an entire byte is shown.
1156 * NB! the format on the wire is the target endianness
1158 * The format of reg->value is little endian
1161 static void gdb_str_to_target(struct target
*target
,
1162 char *tstr
, struct reg
*reg
)
1169 buf_len
= DIV_ROUND_UP(reg
->size
, 8);
1171 for (i
= 0; i
< buf_len
; i
++) {
1172 int j
= gdb_reg_pos(target
, i
, buf_len
);
1173 tstr
+= sprintf(tstr
, "%02x", buf
[j
]);
1177 /* copy over in register buffer */
1178 static void gdb_target_to_reg(struct target
*target
,
1179 char const *tstr
, int str_len
, uint8_t *bin
)
1182 LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
1187 for (i
= 0; i
< str_len
; i
+= 2) {
1189 if (sscanf(tstr
+ i
, "%02x", &t
) != 1) {
1190 LOG_ERROR("BUG: unable to convert register value");
1194 int j
= gdb_reg_pos(target
, i
/2, str_len
/2);
1199 static int gdb_get_registers_packet(struct connection
*connection
,
1200 char const *packet
, int packet_size
)
1202 struct target
*target
= get_target_from_connection(connection
);
1203 struct reg
**reg_list
;
1206 int reg_packet_size
= 0;
1211 #ifdef _DEBUG_GDB_IO_
1215 if ((target
->rtos
!= NULL
) && (ERROR_OK
== rtos_get_gdb_reg_list(connection
)))
1218 retval
= target_get_gdb_reg_list(target
, ®_list
, ®_list_size
,
1220 if (retval
!= ERROR_OK
)
1221 return gdb_error(connection
, retval
);
1223 for (i
= 0; i
< reg_list_size
; i
++) {
1224 if (reg_list
[i
] == NULL
|| reg_list
[i
]->exist
== false || reg_list
[i
]->hidden
)
1226 reg_packet_size
+= DIV_ROUND_UP(reg_list
[i
]->size
, 8) * 2;
1229 assert(reg_packet_size
> 0);
1231 reg_packet
= malloc(reg_packet_size
+ 1); /* plus one for string termination null */
1232 if (reg_packet
== NULL
)
1235 reg_packet_p
= reg_packet
;
1237 for (i
= 0; i
< reg_list_size
; i
++) {
1238 if (reg_list
[i
] == NULL
|| reg_list
[i
]->exist
== false || reg_list
[i
]->hidden
)
1240 if (!reg_list
[i
]->valid
) {
1241 retval
= reg_list
[i
]->type
->get(reg_list
[i
]);
1242 if (retval
!= ERROR_OK
&& gdb_report_register_access_error
) {
1243 LOG_DEBUG("Couldn't get register %s.", reg_list
[i
]->name
);
1246 return gdb_error(connection
, retval
);
1249 gdb_str_to_target(target
, reg_packet_p
, reg_list
[i
]);
1250 reg_packet_p
+= DIV_ROUND_UP(reg_list
[i
]->size
, 8) * 2;
1253 #ifdef _DEBUG_GDB_IO_
1255 char *reg_packet_p_debug
;
1256 reg_packet_p_debug
= strndup(reg_packet
, reg_packet_size
);
1257 LOG_DEBUG("reg_packet: %s", reg_packet_p_debug
);
1258 free(reg_packet_p_debug
);
1262 gdb_put_packet(connection
, reg_packet
, reg_packet_size
);
1270 static int gdb_set_registers_packet(struct connection
*connection
,
1271 char const *packet
, int packet_size
)
1273 struct target
*target
= get_target_from_connection(connection
);
1275 struct reg
**reg_list
;
1278 char const *packet_p
;
1280 #ifdef _DEBUG_GDB_IO_
1284 /* skip command character */
1288 if (packet_size
% 2) {
1289 LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection");
1290 return ERROR_SERVER_REMOTE_CLOSED
;
1293 retval
= target_get_gdb_reg_list(target
, ®_list
, ®_list_size
,
1295 if (retval
!= ERROR_OK
)
1296 return gdb_error(connection
, retval
);
1299 for (i
= 0; i
< reg_list_size
; i
++) {
1301 int chars
= (DIV_ROUND_UP(reg_list
[i
]->size
, 8) * 2);
1303 if (packet_p
+ chars
> packet
+ packet_size
)
1304 LOG_ERROR("BUG: register packet is too small for registers");
1306 bin_buf
= malloc(DIV_ROUND_UP(reg_list
[i
]->size
, 8));
1307 gdb_target_to_reg(target
, packet_p
, chars
, bin_buf
);
1309 retval
= reg_list
[i
]->type
->set(reg_list
[i
], bin_buf
);
1310 if (retval
!= ERROR_OK
&& gdb_report_register_access_error
) {
1311 LOG_DEBUG("Couldn't set register %s.", reg_list
[i
]->name
);
1314 return gdb_error(connection
, retval
);
1317 /* advance packet pointer */
1323 /* free struct reg *reg_list[] array allocated by get_gdb_reg_list */
1326 gdb_put_packet(connection
, "OK", 2);
1331 static int gdb_get_register_packet(struct connection
*connection
,
1332 char const *packet
, int packet_size
)
1334 struct target
*target
= get_target_from_connection(connection
);
1336 int reg_num
= strtoul(packet
+ 1, NULL
, 16);
1337 struct reg
**reg_list
;
1341 #ifdef _DEBUG_GDB_IO_
1345 if ((target
->rtos
!= NULL
) && (ERROR_OK
== rtos_get_gdb_reg(connection
, reg_num
)))
1348 retval
= target_get_gdb_reg_list_noread(target
, ®_list
, ®_list_size
,
1350 if (retval
!= ERROR_OK
)
1351 return gdb_error(connection
, retval
);
1353 if (reg_list_size
<= reg_num
) {
1354 LOG_ERROR("gdb requested a non-existing register");
1355 return ERROR_SERVER_REMOTE_CLOSED
;
1358 if (!reg_list
[reg_num
]->valid
) {
1359 retval
= reg_list
[reg_num
]->type
->get(reg_list
[reg_num
]);
1360 if (retval
!= ERROR_OK
&& gdb_report_register_access_error
) {
1361 LOG_DEBUG("Couldn't get register %s.", reg_list
[reg_num
]->name
);
1363 return gdb_error(connection
, retval
);
1367 reg_packet
= calloc(DIV_ROUND_UP(reg_list
[reg_num
]->size
, 8) * 2 + 1, 1); /* plus one for string termination null */
1369 gdb_str_to_target(target
, reg_packet
, reg_list
[reg_num
]);
1371 gdb_put_packet(connection
, reg_packet
, DIV_ROUND_UP(reg_list
[reg_num
]->size
, 8) * 2);
1379 static int gdb_set_register_packet(struct connection
*connection
,
1380 char const *packet
, int packet_size
)
1382 struct target
*target
= get_target_from_connection(connection
);
1384 int reg_num
= strtoul(packet
+ 1, &separator
, 16);
1385 struct reg
**reg_list
;
1389 #ifdef _DEBUG_GDB_IO_
1393 if (*separator
!= '=') {
1394 LOG_ERROR("GDB 'set register packet', but no '=' following the register number");
1395 return ERROR_SERVER_REMOTE_CLOSED
;
1397 size_t chars
= strlen(separator
+ 1);
1398 uint8_t *bin_buf
= malloc(chars
/ 2);
1399 gdb_target_to_reg(target
, separator
+ 1, chars
, bin_buf
);
1401 if ((target
->rtos
!= NULL
) &&
1402 (ERROR_OK
== rtos_set_reg(connection
, reg_num
, bin_buf
))) {
1404 gdb_put_packet(connection
, "OK", 2);
1408 retval
= target_get_gdb_reg_list_noread(target
, ®_list
, ®_list_size
,
1410 if (retval
!= ERROR_OK
) {
1412 return gdb_error(connection
, retval
);
1415 if (reg_list_size
<= reg_num
) {
1416 LOG_ERROR("gdb requested a non-existing register");
1419 return ERROR_SERVER_REMOTE_CLOSED
;
1422 if (chars
!= (DIV_ROUND_UP(reg_list
[reg_num
]->size
, 8) * 2)) {
1423 LOG_ERROR("gdb sent %zu bits for a %" PRIu32
"-bit register (%s)",
1424 chars
* 4, reg_list
[reg_num
]->size
, reg_list
[reg_num
]->name
);
1427 return ERROR_SERVER_REMOTE_CLOSED
;
1430 gdb_target_to_reg(target
, separator
+ 1, chars
, bin_buf
);
1432 retval
= reg_list
[reg_num
]->type
->set(reg_list
[reg_num
], bin_buf
);
1433 if (retval
!= ERROR_OK
&& gdb_report_register_access_error
) {
1434 LOG_DEBUG("Couldn't set register %s.", reg_list
[reg_num
]->name
);
1437 return gdb_error(connection
, retval
);
1440 gdb_put_packet(connection
, "OK", 2);
1448 /* No attempt is made to translate the "retval" to
1449 * GDB speak. This has to be done at the calling
1450 * site as no mapping really exists.
1452 static int gdb_error(struct connection
*connection
, int retval
)
1454 LOG_DEBUG("Reporting %i to GDB as generic error", retval
);
1455 gdb_send_error(connection
, EFAULT
);
1459 /* We don't have to worry about the default 2 second timeout for GDB packets,
1460 * because GDB breaks up large memory reads into smaller reads.
1462 static int gdb_read_memory_packet(struct connection
*connection
,
1463 char const *packet
, int packet_size
)
1465 struct target
*target
= get_target_from_connection(connection
);
1473 int retval
= ERROR_OK
;
1475 /* skip command character */
1478 addr
= strtoull(packet
, &separator
, 16);
1480 if (*separator
!= ',') {
1481 LOG_ERROR("incomplete read memory packet received, dropping connection");
1482 return ERROR_SERVER_REMOTE_CLOSED
;
1485 len
= strtoul(separator
+ 1, NULL
, 16);
1488 LOG_WARNING("invalid read memory packet received (len == 0)");
1489 gdb_put_packet(connection
, "", 0);
1493 buffer
= malloc(len
);
1495 LOG_DEBUG("addr: 0x%16.16" PRIx64
", len: 0x%8.8" PRIx32
"", addr
, len
);
1497 retval
= target_read_buffer(target
, addr
, len
, buffer
);
1499 if ((retval
!= ERROR_OK
) && !gdb_report_data_abort
) {
1500 /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
1501 * At some point this might be fixed in GDB, in which case this code can be removed.
1503 * OpenOCD developers are acutely aware of this problem, but there is nothing
1504 * gained by involving the user in this problem that hopefully will get resolved
1507 * http://sourceware.org/cgi-bin/gnatsweb.pl? \
1508 * cmd = view%20audit-trail&database = gdb&pr = 2395
1510 * For now, the default is to fix up things to make current GDB versions work.
1511 * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
1513 memset(buffer
, 0, len
);
1517 if (retval
== ERROR_OK
) {
1518 hex_buffer
= malloc(len
* 2 + 1);
1520 size_t pkt_len
= hexify(hex_buffer
, buffer
, len
, len
* 2 + 1);
1522 gdb_put_packet(connection
, hex_buffer
, pkt_len
);
1526 retval
= gdb_error(connection
, retval
);
1533 static int gdb_write_memory_packet(struct connection
*connection
,
1534 char const *packet
, int packet_size
)
1536 struct target
*target
= get_target_from_connection(connection
);
1544 /* skip command character */
1547 addr
= strtoull(packet
, &separator
, 16);
1549 if (*separator
!= ',') {
1550 LOG_ERROR("incomplete write memory packet received, dropping connection");
1551 return ERROR_SERVER_REMOTE_CLOSED
;
1554 len
= strtoul(separator
+ 1, &separator
, 16);
1556 if (*(separator
++) != ':') {
1557 LOG_ERROR("incomplete write memory packet received, dropping connection");
1558 return ERROR_SERVER_REMOTE_CLOSED
;
1561 buffer
= malloc(len
);
1563 LOG_DEBUG("addr: 0x%" PRIx64
", len: 0x%8.8" PRIx32
"", addr
, len
);
1565 if (unhexify(buffer
, separator
, len
) != len
)
1566 LOG_ERROR("unable to decode memory packet");
1568 retval
= target_write_buffer(target
, addr
, len
, buffer
);
1570 if (retval
== ERROR_OK
)
1571 gdb_put_packet(connection
, "OK", 2);
1573 retval
= gdb_error(connection
, retval
);
1580 static int gdb_write_memory_binary_packet(struct connection
*connection
,
1581 char const *packet
, int packet_size
)
1583 struct target
*target
= get_target_from_connection(connection
);
1588 int retval
= ERROR_OK
;
1589 /* Packets larger than fast_limit bytes will be acknowledged instantly on
1590 * the assumption that we're in a download and it's important to go as fast
1592 uint32_t fast_limit
= 8;
1594 /* skip command character */
1597 addr
= strtoull(packet
, &separator
, 16);
1599 if (*separator
!= ',') {
1600 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1601 return ERROR_SERVER_REMOTE_CLOSED
;
1604 len
= strtoul(separator
+ 1, &separator
, 16);
1606 if (*(separator
++) != ':') {
1607 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1608 return ERROR_SERVER_REMOTE_CLOSED
;
1611 struct gdb_connection
*gdb_connection
= connection
->priv
;
1613 if (gdb_connection
->mem_write_error
)
1614 retval
= ERROR_FAIL
;
1616 if (retval
== ERROR_OK
) {
1617 if (len
>= fast_limit
) {
1618 /* By replying the packet *immediately* GDB will send us a new packet
1619 * while we write the last one to the target.
1620 * We only do this for larger writes, so that users who do something like:
1621 * p *((int*)0xdeadbeef)=8675309
1622 * will get immediate feedback that that write failed.
1624 gdb_put_packet(connection
, "OK", 2);
1627 retval
= gdb_error(connection
, retval
);
1628 /* now that we have reported the memory write error, we can clear the condition */
1629 gdb_connection
->mem_write_error
= false;
1630 if (retval
!= ERROR_OK
)
1635 LOG_DEBUG("addr: 0x%" PRIx64
", len: 0x%8.8" PRIx32
"", addr
, len
);
1637 retval
= target_write_buffer(target
, addr
, len
, (uint8_t *)separator
);
1638 if (retval
!= ERROR_OK
)
1639 gdb_connection
->mem_write_error
= true;
1642 if (len
< fast_limit
) {
1643 if (retval
!= ERROR_OK
) {
1644 gdb_error(connection
, retval
);
1645 gdb_connection
->mem_write_error
= false;
1647 gdb_put_packet(connection
, "OK", 2);
1654 static int gdb_step_continue_packet(struct connection
*connection
,
1655 char const *packet
, int packet_size
)
1657 struct target
*target
= get_target_from_connection(connection
);
1659 uint64_t address
= 0x0;
1660 int retval
= ERROR_OK
;
1664 if (packet_size
> 1)
1665 address
= strtoull(packet
+ 1, NULL
, 16);
1669 gdb_running_type
= packet
[0];
1670 if (packet
[0] == 'c') {
1671 LOG_DEBUG("continue");
1672 /* resume at current address, don't handle breakpoints, not debugging */
1673 retval
= target_resume(target
, current
, address
, 0, 0);
1674 } else if (packet
[0] == 's') {
1676 /* step at current or address, don't handle breakpoints */
1677 retval
= target_step(target
, current
, address
, 0);
1682 static int gdb_breakpoint_watchpoint_packet(struct connection
*connection
,
1683 char const *packet
, int packet_size
)
1685 struct target
*target
= get_target_from_connection(connection
);
1687 enum breakpoint_type bp_type
= BKPT_SOFT
/* dummy init to avoid warning */;
1688 enum watchpoint_rw wp_type
= WPT_READ
/* dummy init to avoid warning */;
1694 LOG_DEBUG("[%s]", target_name(target
));
1696 type
= strtoul(packet
+ 1, &separator
, 16);
1698 if (type
== 0) /* memory breakpoint */
1699 bp_type
= BKPT_SOFT
;
1700 else if (type
== 1) /* hardware breakpoint */
1701 bp_type
= BKPT_HARD
;
1702 else if (type
== 2) /* write watchpoint */
1703 wp_type
= WPT_WRITE
;
1704 else if (type
== 3) /* read watchpoint */
1706 else if (type
== 4) /* access watchpoint */
1707 wp_type
= WPT_ACCESS
;
1709 LOG_ERROR("invalid gdb watch/breakpoint type(%d), dropping connection", type
);
1710 return ERROR_SERVER_REMOTE_CLOSED
;
1713 if (gdb_breakpoint_override
&& ((bp_type
== BKPT_SOFT
) || (bp_type
== BKPT_HARD
)))
1714 bp_type
= gdb_breakpoint_override_type
;
1716 if (*separator
!= ',') {
1717 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1718 return ERROR_SERVER_REMOTE_CLOSED
;
1721 address
= strtoull(separator
+ 1, &separator
, 16);
1723 if (*separator
!= ',') {
1724 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1725 return ERROR_SERVER_REMOTE_CLOSED
;
1728 size
= strtoul(separator
+ 1, &separator
, 16);
1733 if (packet
[0] == 'Z') {
1734 retval
= breakpoint_add(target
, address
, size
, bp_type
);
1735 if (retval
!= ERROR_OK
) {
1736 retval
= gdb_error(connection
, retval
);
1737 if (retval
!= ERROR_OK
)
1740 gdb_put_packet(connection
, "OK", 2);
1742 breakpoint_remove(target
, address
);
1743 gdb_put_packet(connection
, "OK", 2);
1750 if (packet
[0] == 'Z') {
1751 retval
= watchpoint_add(target
, address
, size
, wp_type
, 0, 0xffffffffu
);
1752 if (retval
!= ERROR_OK
) {
1753 retval
= gdb_error(connection
, retval
);
1754 if (retval
!= ERROR_OK
)
1757 gdb_put_packet(connection
, "OK", 2);
1759 watchpoint_remove(target
, address
);
1760 gdb_put_packet(connection
, "OK", 2);
1771 /* print out a string and allocate more space as needed,
1772 * mainly used for XML at this point
1774 static __attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT
, 5, 6))) void xml_printf(int *retval
,
1775 char **xml
, int *pos
, int *size
, const char *fmt
, ...)
1777 if (*retval
!= ERROR_OK
)
1782 if ((*xml
== NULL
) || (!first
)) {
1783 /* start by 0 to exercise all the code paths.
1784 * Need minimum 2 bytes to fit 1 char and 0 terminator. */
1786 *size
= *size
* 2 + 2;
1788 *xml
= realloc(*xml
, *size
);
1791 *retval
= ERROR_SERVER_REMOTE_CLOSED
;
1799 ret
= vsnprintf(*xml
+ *pos
, *size
- *pos
, fmt
, ap
);
1801 if ((ret
> 0) && ((ret
+ 1) < *size
- *pos
)) {
1805 /* there was just enough or not enough space, allocate more. */
1810 static int decode_xfer_read(char const *buf
, char **annex
, int *ofs
, unsigned int *len
)
1812 /* Locate the annex. */
1813 const char *annex_end
= strchr(buf
, ':');
1814 if (annex_end
== NULL
)
1817 /* After the read marker and annex, qXfer looks like a
1818 * traditional 'm' packet. */
1820 *ofs
= strtoul(annex_end
+ 1, &separator
, 16);
1822 if (*separator
!= ',')
1825 *len
= strtoul(separator
+ 1, NULL
, 16);
1827 /* Extract the annex if needed */
1828 if (annex
!= NULL
) {
1829 *annex
= strndup(buf
, annex_end
- buf
);
1837 static int compare_bank(const void *a
, const void *b
)
1839 struct flash_bank
*b1
, *b2
;
1840 b1
= *((struct flash_bank
**)a
);
1841 b2
= *((struct flash_bank
**)b
);
1843 if (b1
->base
== b2
->base
)
1845 else if (b1
->base
> b2
->base
)
1851 static int gdb_memory_map(struct connection
*connection
,
1852 char const *packet
, int packet_size
)
1854 /* We get away with only specifying flash here. Regions that are not
1855 * specified are treated as if we provided no memory map(if not we
1856 * could detect the holes and mark them as RAM).
1857 * Normally we only execute this code once, but no big deal if we
1858 * have to regenerate it a couple of times.
1861 struct target
*target
= get_target_from_connection(connection
);
1862 struct flash_bank
*p
;
1866 int retval
= ERROR_OK
;
1867 struct flash_bank
**banks
;
1871 target_addr_t ram_start
= 0;
1872 unsigned int target_flash_banks
= 0;
1874 /* skip command character */
1877 offset
= strtoul(packet
, &separator
, 16);
1878 length
= strtoul(separator
+ 1, &separator
, 16);
1880 xml_printf(&retval
, &xml
, &pos
, &size
, "<memory-map>\n");
1882 /* Sort banks in ascending order. We need to report non-flash
1883 * memory as ram (or rather read/write) by default for GDB, since
1884 * it has no concept of non-cacheable read/write memory (i/o etc).
1886 banks
= malloc(sizeof(struct flash_bank
*)*flash_get_bank_count());
1888 for (unsigned int i
= 0; i
< flash_get_bank_count(); i
++) {
1889 p
= get_flash_bank_by_num_noprobe(i
);
1890 if (p
->target
!= target
)
1892 retval
= get_flash_bank_by_num(i
, &p
);
1893 if (retval
!= ERROR_OK
) {
1895 gdb_error(connection
, retval
);
1898 banks
[target_flash_banks
++] = p
;
1901 qsort(banks
, target_flash_banks
, sizeof(struct flash_bank
*),
1904 for (unsigned int i
= 0; i
< target_flash_banks
; i
++) {
1905 unsigned sector_size
= 0;
1906 unsigned group_len
= 0;
1910 if (ram_start
< p
->base
)
1911 xml_printf(&retval
, &xml
, &pos
, &size
,
1912 "<memory type=\"ram\" start=\"" TARGET_ADDR_FMT
"\" "
1913 "length=\"" TARGET_ADDR_FMT
"\"/>\n",
1914 ram_start
, p
->base
- ram_start
);
1916 /* Report adjacent groups of same-size sectors. So for
1917 * example top boot CFI flash will list an initial region
1918 * with several large sectors (maybe 128KB) and several
1919 * smaller ones at the end (maybe 32KB). STR7 will have
1920 * regions with 8KB, 32KB, and 64KB sectors; etc.
1922 for (unsigned int j
= 0; j
< p
->num_sectors
; j
++) {
1924 /* Maybe start a new group of sectors. */
1925 if (sector_size
== 0) {
1926 if (p
->sectors
[j
].offset
+ p
->sectors
[j
].size
> p
->size
) {
1927 LOG_WARNING("The flash sector at offset 0x%08" PRIx32
1928 " overflows the end of %s bank.",
1929 p
->sectors
[j
].offset
, p
->name
);
1930 LOG_WARNING("The rest of bank will not show in gdb memory map.");
1933 target_addr_t start
;
1934 start
= p
->base
+ p
->sectors
[j
].offset
;
1935 xml_printf(&retval
, &xml
, &pos
, &size
,
1936 "<memory type=\"flash\" "
1937 "start=\"" TARGET_ADDR_FMT
"\" ",
1939 sector_size
= p
->sectors
[j
].size
;
1940 group_len
= sector_size
;
1942 group_len
+= sector_size
; /* equal to p->sectors[j].size */
1945 /* Does this finish a group of sectors?
1946 * If not, continue an already-started group.
1948 if (j
< p
->num_sectors
- 1
1949 && p
->sectors
[j
+ 1].size
== sector_size
1950 && p
->sectors
[j
+ 1].offset
== p
->sectors
[j
].offset
+ sector_size
1951 && p
->sectors
[j
+ 1].offset
+ p
->sectors
[j
+ 1].size
<= p
->size
)
1954 xml_printf(&retval
, &xml
, &pos
, &size
,
1955 "length=\"0x%x\">\n"
1956 "<property name=\"blocksize\">"
1964 ram_start
= p
->base
+ p
->size
;
1968 xml_printf(&retval
, &xml
, &pos
, &size
,
1969 "<memory type=\"ram\" start=\"" TARGET_ADDR_FMT
"\" "
1970 "length=\"" TARGET_ADDR_FMT
"\"/>\n",
1971 ram_start
, target_address_max(target
) - ram_start
+ 1);
1972 /* ELSE a flash chip could be at the very end of the address space, in
1973 * which case ram_start will be precisely 0 */
1977 xml_printf(&retval
, &xml
, &pos
, &size
, "</memory-map>\n");
1979 if (retval
!= ERROR_OK
) {
1981 gdb_error(connection
, retval
);
1985 if (offset
+ length
> pos
)
1986 length
= pos
- offset
;
1988 char *t
= malloc(length
+ 1);
1990 memcpy(t
+ 1, xml
+ offset
, length
);
1991 gdb_put_packet(connection
, t
, length
+ 1);
1998 static const char *gdb_get_reg_type_name(enum reg_type type
)
2007 case REG_TYPE_INT16
:
2009 case REG_TYPE_INT32
:
2011 case REG_TYPE_INT64
:
2013 case REG_TYPE_INT128
:
2017 case REG_TYPE_UINT8
:
2019 case REG_TYPE_UINT16
:
2021 case REG_TYPE_UINT32
:
2023 case REG_TYPE_UINT64
:
2025 case REG_TYPE_UINT128
:
2027 case REG_TYPE_CODE_PTR
:
2029 case REG_TYPE_DATA_PTR
:
2031 case REG_TYPE_FLOAT
:
2033 case REG_TYPE_IEEE_SINGLE
:
2034 return "ieee_single";
2035 case REG_TYPE_IEEE_DOUBLE
:
2036 return "ieee_double";
2037 case REG_TYPE_ARCH_DEFINED
:
2038 return "int"; /* return arbitrary string to avoid compile warning. */
2041 return "int"; /* "int" as default value */
2044 static int lookup_add_arch_defined_types(char const **arch_defined_types_list
[], const char *type_id
,
2045 int *num_arch_defined_types
)
2047 int tbl_sz
= *num_arch_defined_types
;
2049 if (type_id
!= NULL
&& (strcmp(type_id
, ""))) {
2050 for (int j
= 0; j
< (tbl_sz
+ 1); j
++) {
2051 if (!((*arch_defined_types_list
)[j
])) {
2052 (*arch_defined_types_list
)[tbl_sz
++] = type_id
;
2053 *arch_defined_types_list
= realloc(*arch_defined_types_list
,
2054 sizeof(char *) * (tbl_sz
+ 1));
2055 (*arch_defined_types_list
)[tbl_sz
] = NULL
;
2056 *num_arch_defined_types
= tbl_sz
;
2059 if (!strcmp((*arch_defined_types_list
)[j
], type_id
))
2068 static int gdb_generate_reg_type_description(struct target
*target
,
2069 char **tdesc
, int *pos
, int *size
, struct reg_data_type
*type
,
2070 char const **arch_defined_types_list
[], int *num_arch_defined_types
)
2072 int retval
= ERROR_OK
;
2074 if (type
->type_class
== REG_TYPE_CLASS_VECTOR
) {
2075 struct reg_data_type
*data_type
= type
->reg_type_vector
->type
;
2076 if (data_type
->type
== REG_TYPE_ARCH_DEFINED
) {
2077 if (lookup_add_arch_defined_types(arch_defined_types_list
, data_type
->id
,
2078 num_arch_defined_types
))
2079 gdb_generate_reg_type_description(target
, tdesc
, pos
, size
, data_type
,
2080 arch_defined_types_list
,
2081 num_arch_defined_types
);
2083 /* <vector id="id" type="type" count="count"/> */
2084 xml_printf(&retval
, tdesc
, pos
, size
,
2085 "<vector id=\"%s\" type=\"%s\" count=\"%" PRIu32
"\"/>\n",
2086 type
->id
, type
->reg_type_vector
->type
->id
,
2087 type
->reg_type_vector
->count
);
2089 } else if (type
->type_class
== REG_TYPE_CLASS_UNION
) {
2090 struct reg_data_type_union_field
*field
;
2091 field
= type
->reg_type_union
->fields
;
2092 while (field
!= NULL
) {
2093 struct reg_data_type
*data_type
= field
->type
;
2094 if (data_type
->type
== REG_TYPE_ARCH_DEFINED
) {
2095 if (lookup_add_arch_defined_types(arch_defined_types_list
, data_type
->id
,
2096 num_arch_defined_types
))
2097 gdb_generate_reg_type_description(target
, tdesc
, pos
, size
, data_type
,
2098 arch_defined_types_list
,
2099 num_arch_defined_types
);
2102 field
= field
->next
;
2105 * <field name="name" type="type"/> ...
2107 xml_printf(&retval
, tdesc
, pos
, size
,
2108 "<union id=\"%s\">\n",
2111 field
= type
->reg_type_union
->fields
;
2112 while (field
!= NULL
) {
2113 xml_printf(&retval
, tdesc
, pos
, size
,
2114 "<field name=\"%s\" type=\"%s\"/>\n",
2115 field
->name
, field
->type
->id
);
2117 field
= field
->next
;
2120 xml_printf(&retval
, tdesc
, pos
, size
,
2123 } else if (type
->type_class
== REG_TYPE_CLASS_STRUCT
) {
2124 struct reg_data_type_struct_field
*field
;
2125 field
= type
->reg_type_struct
->fields
;
2127 if (field
->use_bitfields
) {
2128 /* <struct id="id" size="size">
2129 * <field name="name" start="start" end="end"/> ...
2131 xml_printf(&retval
, tdesc
, pos
, size
,
2132 "<struct id=\"%s\" size=\"%" PRIu32
"\">\n",
2133 type
->id
, type
->reg_type_struct
->size
);
2134 while (field
!= NULL
) {
2135 xml_printf(&retval
, tdesc
, pos
, size
,
2136 "<field name=\"%s\" start=\"%" PRIu32
"\" end=\"%" PRIu32
"\" type=\"%s\" />\n",
2137 field
->name
, field
->bitfield
->start
, field
->bitfield
->end
,
2138 gdb_get_reg_type_name(field
->bitfield
->type
));
2140 field
= field
->next
;
2143 while (field
!= NULL
) {
2144 struct reg_data_type
*data_type
= field
->type
;
2145 if (data_type
->type
== REG_TYPE_ARCH_DEFINED
) {
2146 if (lookup_add_arch_defined_types(arch_defined_types_list
, data_type
->id
,
2147 num_arch_defined_types
))
2148 gdb_generate_reg_type_description(target
, tdesc
, pos
, size
, data_type
,
2149 arch_defined_types_list
,
2150 num_arch_defined_types
);
2155 * <field name="name" type="type"/> ...
2157 xml_printf(&retval
, tdesc
, pos
, size
,
2158 "<struct id=\"%s\">\n",
2160 while (field
!= NULL
) {
2161 xml_printf(&retval
, tdesc
, pos
, size
,
2162 "<field name=\"%s\" type=\"%s\"/>\n",
2163 field
->name
, field
->type
->id
);
2165 field
= field
->next
;
2169 xml_printf(&retval
, tdesc
, pos
, size
,
2172 } else if (type
->type_class
== REG_TYPE_CLASS_FLAGS
) {
2173 /* <flags id="id" size="size">
2174 * <field name="name" start="start" end="end"/> ...
2176 xml_printf(&retval
, tdesc
, pos
, size
,
2177 "<flags id=\"%s\" size=\"%" PRIu32
"\">\n",
2178 type
->id
, type
->reg_type_flags
->size
);
2180 struct reg_data_type_flags_field
*field
;
2181 field
= type
->reg_type_flags
->fields
;
2182 while (field
!= NULL
) {
2183 xml_printf(&retval
, tdesc
, pos
, size
,
2184 "<field name=\"%s\" start=\"%" PRIu32
"\" end=\"%" PRIu32
"\" type=\"%s\" />\n",
2185 field
->name
, field
->bitfield
->start
, field
->bitfield
->end
,
2186 gdb_get_reg_type_name(field
->bitfield
->type
));
2188 field
= field
->next
;
2191 xml_printf(&retval
, tdesc
, pos
, size
,
2199 /* Get a list of available target registers features. feature_list must
2200 * be freed by caller.
2202 static int get_reg_features_list(struct target
*target
, char const **feature_list
[], int *feature_list_size
,
2203 struct reg
**reg_list
, int reg_list_size
)
2207 /* Start with only one element */
2208 *feature_list
= calloc(1, sizeof(char *));
2210 for (int i
= 0; i
< reg_list_size
; i
++) {
2211 if (reg_list
[i
]->exist
== false || reg_list
[i
]->hidden
)
2214 if (reg_list
[i
]->feature
!= NULL
2215 && reg_list
[i
]->feature
->name
!= NULL
2216 && (strcmp(reg_list
[i
]->feature
->name
, ""))) {
2217 /* We found a feature, check if the feature is already in the
2218 * table. If not, allocate a new entry for the table and
2219 * put the new feature in it.
2221 for (int j
= 0; j
< (tbl_sz
+ 1); j
++) {
2222 if (!((*feature_list
)[j
])) {
2223 (*feature_list
)[tbl_sz
++] = reg_list
[i
]->feature
->name
;
2224 *feature_list
= realloc(*feature_list
, sizeof(char *) * (tbl_sz
+ 1));
2225 (*feature_list
)[tbl_sz
] = NULL
;
2228 if (!strcmp((*feature_list
)[j
], reg_list
[i
]->feature
->name
))
2235 if (feature_list_size
)
2236 *feature_list_size
= tbl_sz
;
2241 static int gdb_generate_target_description(struct target
*target
, char **tdesc_out
)
2243 int retval
= ERROR_OK
;
2244 struct reg
**reg_list
= NULL
;
2246 char const *architecture
;
2247 char const **features
= NULL
;
2248 int feature_list_size
= 0;
2254 retval
= target_get_gdb_reg_list_noread(target
, ®_list
,
2255 ®_list_size
, REG_CLASS_ALL
);
2257 if (retval
!= ERROR_OK
) {
2258 LOG_ERROR("get register list failed");
2259 retval
= ERROR_FAIL
;
2263 if (reg_list_size
<= 0) {
2264 LOG_ERROR("get register list failed");
2265 retval
= ERROR_FAIL
;
2269 /* Get a list of available target registers features */
2270 retval
= get_reg_features_list(target
, &features
, &feature_list_size
, reg_list
, reg_list_size
);
2271 if (retval
!= ERROR_OK
) {
2272 LOG_ERROR("Can't get the registers feature list");
2273 retval
= ERROR_FAIL
;
2277 /* If we found some features associated with registers, create sections */
2278 int current_feature
= 0;
2280 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2281 "<?xml version=\"1.0\"?>\n"
2282 "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">\n"
2283 "<target version=\"1.0\">\n");
2285 /* generate architecture element if supported by target */
2286 architecture
= target_get_gdb_arch(target
);
2287 if (architecture
!= NULL
)
2288 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2289 "<architecture>%s</architecture>\n", architecture
);
2291 /* generate target description according to register list */
2292 if (features
!= NULL
) {
2293 while (features
[current_feature
]) {
2294 char const **arch_defined_types
= NULL
;
2295 int num_arch_defined_types
= 0;
2297 arch_defined_types
= calloc(1, sizeof(char *));
2298 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2299 "<feature name=\"%s\">\n",
2300 features
[current_feature
]);
2303 for (i
= 0; i
< reg_list_size
; i
++) {
2305 if (reg_list
[i
]->exist
== false || reg_list
[i
]->hidden
)
2308 if (strcmp(reg_list
[i
]->feature
->name
, features
[current_feature
]))
2311 const char *type_str
;
2312 if (reg_list
[i
]->reg_data_type
!= NULL
) {
2313 if (reg_list
[i
]->reg_data_type
->type
== REG_TYPE_ARCH_DEFINED
) {
2314 /* generate <type... first, if there are architecture-defined types. */
2315 if (lookup_add_arch_defined_types(&arch_defined_types
,
2316 reg_list
[i
]->reg_data_type
->id
,
2317 &num_arch_defined_types
))
2318 gdb_generate_reg_type_description(target
, &tdesc
, &pos
, &size
,
2319 reg_list
[i
]->reg_data_type
,
2320 &arch_defined_types
,
2321 &num_arch_defined_types
);
2323 type_str
= reg_list
[i
]->reg_data_type
->id
;
2325 /* predefined type */
2326 type_str
= gdb_get_reg_type_name(
2327 reg_list
[i
]->reg_data_type
->type
);
2330 /* Default type is "int" */
2334 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2335 "<reg name=\"%s\"", reg_list
[i
]->name
);
2336 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2337 " bitsize=\"%" PRIu32
"\"", reg_list
[i
]->size
);
2338 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2339 " regnum=\"%" PRIu32
"\"", reg_list
[i
]->number
);
2340 if (reg_list
[i
]->caller_save
)
2341 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2342 " save-restore=\"yes\"");
2344 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2345 " save-restore=\"no\"");
2347 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2348 " type=\"%s\"", type_str
);
2350 if (reg_list
[i
]->group
!= NULL
)
2351 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2352 " group=\"%s\"", reg_list
[i
]->group
);
2354 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2358 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2362 free(arch_defined_types
);
2366 xml_printf(&retval
, &tdesc
, &pos
, &size
,
2373 if (retval
== ERROR_OK
)
2381 static int gdb_get_target_description_chunk(struct target
*target
, struct target_desc_format
*target_desc
,
2382 char **chunk
, int32_t offset
, uint32_t length
)
2384 if (target_desc
== NULL
) {
2385 LOG_ERROR("Unable to Generate Target Description");
2389 char *tdesc
= target_desc
->tdesc
;
2390 uint32_t tdesc_length
= target_desc
->tdesc_length
;
2392 if (tdesc
== NULL
) {
2393 int retval
= gdb_generate_target_description(target
, &tdesc
);
2394 if (retval
!= ERROR_OK
) {
2395 LOG_ERROR("Unable to Generate Target Description");
2399 tdesc_length
= strlen(tdesc
);
2404 if (length
< (tdesc_length
- offset
))
2405 transfer_type
= 'm';
2407 transfer_type
= 'l';
2409 *chunk
= malloc(length
+ 2);
2410 if (*chunk
== NULL
) {
2411 LOG_ERROR("Unable to allocate memory");
2415 (*chunk
)[0] = transfer_type
;
2416 if (transfer_type
== 'm') {
2417 strncpy((*chunk
) + 1, tdesc
+ offset
, length
);
2418 (*chunk
)[1 + length
] = '\0';
2420 strncpy((*chunk
) + 1, tdesc
+ offset
, tdesc_length
- offset
);
2421 (*chunk
)[1 + (tdesc_length
- offset
)] = '\0';
2423 /* After gdb-server sends out last chunk, invalidate tdesc. */
2429 target_desc
->tdesc
= tdesc
;
2430 target_desc
->tdesc_length
= tdesc_length
;
2435 static int gdb_target_description_supported(struct target
*target
, int *supported
)
2437 int retval
= ERROR_OK
;
2438 struct reg
**reg_list
= NULL
;
2439 int reg_list_size
= 0;
2440 char const **features
= NULL
;
2441 int feature_list_size
= 0;
2443 char const *architecture
= target_get_gdb_arch(target
);
2445 retval
= target_get_gdb_reg_list_noread(target
, ®_list
,
2446 ®_list_size
, REG_CLASS_ALL
);
2447 if (retval
!= ERROR_OK
) {
2448 LOG_ERROR("get register list failed");
2452 if (reg_list_size
<= 0) {
2453 LOG_ERROR("get register list failed");
2454 retval
= ERROR_FAIL
;
2458 /* Get a list of available target registers features */
2459 retval
= get_reg_features_list(target
, &features
, &feature_list_size
, reg_list
, reg_list_size
);
2460 if (retval
!= ERROR_OK
) {
2461 LOG_ERROR("Can't get the registers feature list");
2466 if (architecture
|| feature_list_size
)
2480 static int gdb_generate_thread_list(struct target
*target
, char **thread_list_out
)
2482 struct rtos
*rtos
= target
->rtos
;
2483 int retval
= ERROR_OK
;
2484 char *thread_list
= NULL
;
2488 xml_printf(&retval
, &thread_list
, &pos
, &size
,
2489 "<?xml version=\"1.0\"?>\n"
2493 for (int i
= 0; i
< rtos
->thread_count
; i
++) {
2494 struct thread_detail
*thread_detail
= &rtos
->thread_details
[i
];
2496 if (!thread_detail
->exists
)
2499 xml_printf(&retval
, &thread_list
, &pos
, &size
,
2500 "<thread id=\"%" PRIx64
"\">", thread_detail
->threadid
);
2502 if (thread_detail
->thread_name_str
!= NULL
)
2503 xml_printf(&retval
, &thread_list
, &pos
, &size
,
2504 "Name: %s", thread_detail
->thread_name_str
);
2506 if (thread_detail
->extra_info_str
!= NULL
) {
2507 if (thread_detail
->thread_name_str
!= NULL
)
2508 xml_printf(&retval
, &thread_list
, &pos
, &size
,
2510 xml_printf(&retval
, &thread_list
, &pos
, &size
,
2511 "%s", thread_detail
->extra_info_str
);
2514 xml_printf(&retval
, &thread_list
, &pos
, &size
,
2519 xml_printf(&retval
, &thread_list
, &pos
, &size
,
2522 if (retval
== ERROR_OK
)
2523 *thread_list_out
= thread_list
;
2530 static int gdb_get_thread_list_chunk(struct target
*target
, char **thread_list
,
2531 char **chunk
, int32_t offset
, uint32_t length
)
2533 if (*thread_list
== NULL
) {
2534 int retval
= gdb_generate_thread_list(target
, thread_list
);
2535 if (retval
!= ERROR_OK
) {
2536 LOG_ERROR("Unable to Generate Thread List");
2541 size_t thread_list_length
= strlen(*thread_list
);
2544 length
= MIN(length
, thread_list_length
- offset
);
2545 if (length
< (thread_list_length
- offset
))
2546 transfer_type
= 'm';
2548 transfer_type
= 'l';
2550 *chunk
= malloc(length
+ 2 + 3);
2551 /* Allocating extra 3 bytes prevents false positive valgrind report
2552 * of strlen(chunk) word access:
2553 * Invalid read of size 4
2554 * Address 0x4479934 is 44 bytes inside a block of size 45 alloc'd */
2555 if (*chunk
== NULL
) {
2556 LOG_ERROR("Unable to allocate memory");
2560 (*chunk
)[0] = transfer_type
;
2561 strncpy((*chunk
) + 1, (*thread_list
) + offset
, length
);
2562 (*chunk
)[1 + length
] = '\0';
2564 /* After gdb-server sends out last chunk, invalidate thread list. */
2565 if (transfer_type
== 'l') {
2567 *thread_list
= NULL
;
2573 static int gdb_query_packet(struct connection
*connection
,
2574 char const *packet
, int packet_size
)
2576 struct command_context
*cmd_ctx
= connection
->cmd_ctx
;
2577 struct gdb_connection
*gdb_connection
= connection
->priv
;
2578 struct target
*target
= get_target_from_connection(connection
);
2580 if (strncmp(packet
, "qRcmd,", 6) == 0) {
2581 if (packet_size
> 6) {
2583 cmd
= malloc((packet_size
- 6) / 2 + 1);
2584 size_t len
= unhexify((uint8_t *)cmd
, packet
+ 6, (packet_size
- 6) / 2);
2587 /* We want to print all debug output to GDB connection */
2588 log_add_callback(gdb_log_callback
, connection
);
2589 target_call_timer_callbacks_now();
2590 /* some commands need to know the GDB connection, make note of current
2591 * GDB connection. */
2592 current_gdb_connection
= gdb_connection
;
2593 command_run_line(cmd_ctx
, cmd
);
2594 current_gdb_connection
= NULL
;
2595 target_call_timer_callbacks_now();
2596 log_remove_callback(gdb_log_callback
, connection
);
2599 gdb_put_packet(connection
, "OK", 2);
2601 } else if (strncmp(packet
, "qCRC:", 5) == 0) {
2602 if (packet_size
> 5) {
2607 target_addr_t addr
= 0;
2610 /* skip command character */
2613 addr
= strtoull(packet
, &separator
, 16);
2615 if (*separator
!= ',') {
2616 LOG_ERROR("incomplete read memory packet received, dropping connection");
2617 return ERROR_SERVER_REMOTE_CLOSED
;
2620 len
= strtoul(separator
+ 1, NULL
, 16);
2622 retval
= target_checksum_memory(target
, addr
, len
, &checksum
);
2624 if (retval
== ERROR_OK
) {
2625 snprintf(gdb_reply
, 10, "C%8.8" PRIx32
"", checksum
);
2626 gdb_put_packet(connection
, gdb_reply
, 9);
2628 retval
= gdb_error(connection
, retval
);
2629 if (retval
!= ERROR_OK
)
2635 } else if (strncmp(packet
, "qSupported", 10) == 0) {
2636 /* we currently support packet size and qXfer:memory-map:read (if enabled)
2637 * qXfer:features:read is supported for some targets */
2638 int retval
= ERROR_OK
;
2639 char *buffer
= NULL
;
2642 int gdb_target_desc_supported
= 0;
2644 /* we need to test that the target supports target descriptions */
2645 retval
= gdb_target_description_supported(target
, &gdb_target_desc_supported
);
2646 if (retval
!= ERROR_OK
) {
2647 LOG_INFO("Failed detecting Target Description Support, disabling");
2648 gdb_target_desc_supported
= 0;
2651 /* support may be disabled globally */
2652 if (gdb_use_target_description
== 0) {
2653 if (gdb_target_desc_supported
)
2654 LOG_WARNING("Target Descriptions Supported, but disabled");
2655 gdb_target_desc_supported
= 0;
2662 "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read%c;qXfer:threads:read+;QStartNoAckMode+;vContSupported+",
2664 ((gdb_use_memory_map
== 1) && (flash_get_bank_count() > 0)) ? '+' : '-',
2665 (gdb_target_desc_supported
== 1) ? '+' : '-');
2667 if (retval
!= ERROR_OK
) {
2668 gdb_send_error(connection
, 01);
2672 gdb_put_packet(connection
, buffer
, strlen(buffer
));
2676 } else if ((strncmp(packet
, "qXfer:memory-map:read::", 23) == 0)
2677 && (flash_get_bank_count() > 0))
2678 return gdb_memory_map(connection
, packet
, packet_size
);
2679 else if (strncmp(packet
, "qXfer:features:read:", 20) == 0) {
2681 int retval
= ERROR_OK
;
2684 unsigned int length
;
2686 /* skip command character */
2689 if (decode_xfer_read(packet
, NULL
, &offset
, &length
) < 0) {
2690 gdb_send_error(connection
, 01);
2694 /* Target should prepare correct target description for annex.
2695 * The first character of returned xml is 'm' or 'l'. 'm' for
2696 * there are *more* chunks to transfer. 'l' for it is the *last*
2697 * chunk of target description.
2699 retval
= gdb_get_target_description_chunk(target
, &gdb_connection
->target_desc
,
2700 &xml
, offset
, length
);
2701 if (retval
!= ERROR_OK
) {
2702 gdb_error(connection
, retval
);
2706 gdb_put_packet(connection
, xml
, strlen(xml
));
2710 } else if (strncmp(packet
, "qXfer:threads:read:", 19) == 0) {
2712 int retval
= ERROR_OK
;
2715 unsigned int length
;
2717 /* skip command character */
2720 if (decode_xfer_read(packet
, NULL
, &offset
, &length
) < 0) {
2721 gdb_send_error(connection
, 01);
2725 /* Target should prepare correct thread list for annex.
2726 * The first character of returned xml is 'm' or 'l'. 'm' for
2727 * there are *more* chunks to transfer. 'l' for it is the *last*
2728 * chunk of target description.
2730 retval
= gdb_get_thread_list_chunk(target
, &gdb_connection
->thread_list
,
2731 &xml
, offset
, length
);
2732 if (retval
!= ERROR_OK
) {
2733 gdb_error(connection
, retval
);
2737 gdb_put_packet(connection
, xml
, strlen(xml
));
2741 } else if (strncmp(packet
, "QStartNoAckMode", 15) == 0) {
2742 gdb_connection
->noack_mode
= 1;
2743 gdb_put_packet(connection
, "OK", 2);
2747 gdb_put_packet(connection
, "", 0);
2751 static bool gdb_handle_vcont_packet(struct connection
*connection
, const char *packet
, int packet_size
)
2753 struct gdb_connection
*gdb_connection
= connection
->priv
;
2754 struct target
*target
= get_target_from_connection(connection
);
2755 const char *parse
= packet
;
2758 /* query for vCont supported */
2759 if (parse
[0] == '?') {
2760 if (target
->type
->step
!= NULL
) {
2761 /* gdb doesn't accept c without C and s without S */
2762 gdb_put_packet(connection
, "vCont;c;C;s;S", 13);
2768 if (parse
[0] == ';') {
2773 /* simple case, a continue packet */
2774 if (parse
[0] == 'c') {
2775 gdb_running_type
= 'c';
2776 LOG_DEBUG("target %s continue", target_name(target
));
2777 log_add_callback(gdb_log_callback
, connection
);
2778 retval
= target_resume(target
, 1, 0, 0, 0);
2779 if (retval
== ERROR_TARGET_NOT_HALTED
)
2780 LOG_INFO("target %s was not halted when resume was requested", target_name(target
));
2782 /* poll target in an attempt to make its internal state consistent */
2783 if (retval
!= ERROR_OK
) {
2784 retval
= target_poll(target
);
2785 if (retval
!= ERROR_OK
)
2786 LOG_DEBUG("error polling target %s after failed resume", target_name(target
));
2790 * We don't report errors to gdb here, move frontend_state to
2791 * TARGET_RUNNING to stay in sync with gdb's expectation of the
2794 gdb_connection
->frontend_state
= TARGET_RUNNING
;
2795 target_call_event_callbacks(target
, TARGET_EVENT_GDB_START
);
2800 /* single-step or step-over-breakpoint */
2801 if (parse
[0] == 's') {
2802 gdb_running_type
= 's';
2803 bool fake_step
= false;
2805 if (strncmp(parse
, "s:", 2) == 0) {
2806 struct target
*ct
= target
;
2814 thread_id
= strtoll(parse
, &endp
, 16);
2816 packet_size
-= endp
- parse
;
2820 if (target
->rtos
!= NULL
) {
2821 /* FIXME: why is this necessary? rtos state should be up-to-date here already! */
2822 rtos_update_threads(target
);
2824 target
->rtos
->gdb_target_for_threadid(connection
, thread_id
, &ct
);
2827 * check if the thread to be stepped is the current rtos thread
2828 * if not, we must fake the step
2830 if (target
->rtos
->current_thread
!= thread_id
)
2834 if (parse
[0] == ';') {
2838 if (parse
[0] == 'c') {
2841 /* check if thread-id follows */
2842 if (parse
[0] == ':') {
2846 tid
= strtoll(parse
, &endp
, 16);
2847 if (tid
== thread_id
) {
2849 * Special case: only step a single thread (core),
2850 * keep the other threads halted. Currently, only
2851 * aarch64 target understands it. Other target types don't
2852 * care (nobody checks the actual value of 'current')
2853 * and it doesn't really matter. This deserves
2854 * a symbolic constant and a formal interface documentation
2857 LOG_DEBUG("request to step current core only");
2858 /* uncomment after checking that indeed other targets are safe */
2865 LOG_DEBUG("target %s single-step thread %"PRIx64
, target_name(ct
), thread_id
);
2866 log_add_callback(gdb_log_callback
, connection
);
2867 target_call_event_callbacks(ct
, TARGET_EVENT_GDB_START
);
2870 * work around an annoying gdb behaviour: when the current thread
2871 * is changed in gdb, it assumes that the target can follow and also
2872 * make the thread current. This is an assumption that cannot hold
2873 * for a real target running a multi-threading OS. We just fake
2874 * the step to not trigger an internal error in gdb. See
2875 * https://sourceware.org/bugzilla/show_bug.cgi?id=22925 for details
2879 char sig_reply
[128];
2881 LOG_DEBUG("fake step thread %"PRIx64
, thread_id
);
2883 sig_reply_len
= snprintf(sig_reply
, sizeof(sig_reply
),
2884 "T05thread:%016"PRIx64
";", thread_id
);
2886 gdb_put_packet(connection
, sig_reply
, sig_reply_len
);
2887 log_remove_callback(gdb_log_callback
, connection
);
2892 /* support for gdb_sync command */
2893 if (gdb_connection
->sync
) {
2894 gdb_connection
->sync
= false;
2895 if (ct
->state
== TARGET_HALTED
) {
2896 LOG_DEBUG("stepi ignored. GDB will now fetch the register state "
2897 "from the target.");
2898 gdb_sig_halted(connection
);
2899 log_remove_callback(gdb_log_callback
, connection
);
2901 gdb_connection
->frontend_state
= TARGET_RUNNING
;
2905 retval
= target_step(ct
, current_pc
, 0, 0);
2906 if (retval
== ERROR_TARGET_NOT_HALTED
)
2907 LOG_INFO("target %s was not halted when step was requested", target_name(ct
));
2909 /* if step was successful send a reply back to gdb */
2910 if (retval
== ERROR_OK
) {
2911 retval
= target_poll(ct
);
2912 if (retval
!= ERROR_OK
)
2913 LOG_DEBUG("error polling target %s after successful step", target_name(ct
));
2914 /* send back signal information */
2915 gdb_signal_reply(ct
, connection
);
2916 /* stop forwarding log packets! */
2917 log_remove_callback(gdb_log_callback
, connection
);
2919 gdb_connection
->frontend_state
= TARGET_RUNNING
;
2921 LOG_ERROR("Unknown vCont packet");
2930 static char *next_hex_encoded_field(const char **str
, char sep
)
2933 const char *hex
= *str
;
2937 const char *end
= strchr(hex
, sep
);
2939 hexlen
= strlen(hex
);
2942 *str
= hex
+ hexlen
+ 1;
2944 if (hexlen
% 2 != 0) {
2945 /* Malformed hex data */
2949 size_t count
= hexlen
/ 2;
2950 char *decoded
= malloc(count
+ 1);
2951 if (decoded
== NULL
)
2954 size_t converted
= unhexify((void *)decoded
, hex
, count
);
2955 if (converted
!= count
) {
2960 decoded
[count
] = '\0';
2964 /* handle extended restart packet */
2965 static void gdb_restart_inferior(struct connection
*connection
, const char *packet
, int packet_size
)
2967 struct gdb_connection
*gdb_con
= connection
->priv
;
2968 struct target
*target
= get_target_from_connection(connection
);
2970 breakpoint_clear_target(target
);
2971 watchpoint_clear_target(target
);
2972 command_run_linef(connection
->cmd_ctx
, "ocd_gdb_restart %s",
2973 target_name(target
));
2974 /* set connection as attached after reset */
2975 gdb_con
->attached
= true;
2976 /* info rtos parts */
2977 gdb_thread_packet(connection
, packet
, packet_size
);
2980 static bool gdb_handle_vrun_packet(struct connection
*connection
, const char *packet
, int packet_size
)
2982 struct target
*target
= get_target_from_connection(connection
);
2983 const char *parse
= packet
;
2988 if (parse
[0] != ';')
2992 /* Skip first field "filename"; don't know what to do with it. */
2993 free(next_hex_encoded_field(&parse
, ';'));
2995 char *cmdline
= next_hex_encoded_field(&parse
, ';');
2997 while (cmdline
!= NULL
&& (arg
= next_hex_encoded_field(&parse
, ';')) != NULL
) {
2998 char *new_cmdline
= alloc_printf("%s %s", cmdline
, arg
);
3001 cmdline
= new_cmdline
;
3004 if (cmdline
!= NULL
) {
3005 if (target
->semihosting
!= NULL
) {
3006 LOG_INFO("GDB set inferior command line to '%s'", cmdline
);
3007 free(target
->semihosting
->cmdline
);
3008 target
->semihosting
->cmdline
= cmdline
;
3010 LOG_INFO("GDB set inferior command line to '%s' but semihosting is unavailable", cmdline
);
3015 gdb_restart_inferior(connection
, packet
, packet_size
);
3016 gdb_put_packet(connection
, "S00", 3);
3020 static int gdb_v_packet(struct connection
*connection
,
3021 char const *packet
, int packet_size
)
3023 struct gdb_connection
*gdb_connection
= connection
->priv
;
3026 struct target
*target
= get_target_from_connection(connection
);
3028 if (strncmp(packet
, "vCont", 5) == 0) {
3034 handled
= gdb_handle_vcont_packet(connection
, packet
, packet_size
);
3036 gdb_put_packet(connection
, "", 0);
3041 if (strncmp(packet
, "vRun", 4) == 0) {
3044 handled
= gdb_handle_vrun_packet(connection
, packet
, packet_size
);
3046 gdb_put_packet(connection
, "", 0);
3051 /* if flash programming disabled - send a empty reply */
3053 if (gdb_flash_program
== 0) {
3054 gdb_put_packet(connection
, "", 0);
3058 if (strncmp(packet
, "vFlashErase:", 12) == 0) {
3060 unsigned long length
;
3062 char const *parse
= packet
+ 12;
3063 if (*parse
== '\0') {
3064 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
3065 return ERROR_SERVER_REMOTE_CLOSED
;
3068 addr
= strtoul(parse
, (char **)&parse
, 16);
3070 if (*(parse
++) != ',' || *parse
== '\0') {
3071 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
3072 return ERROR_SERVER_REMOTE_CLOSED
;
3075 length
= strtoul(parse
, (char **)&parse
, 16);
3077 if (*parse
!= '\0') {
3078 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
3079 return ERROR_SERVER_REMOTE_CLOSED
;
3082 /* assume all sectors need erasing - stops any problems
3083 * when flash_write is called multiple times */
3086 /* perform any target specific operations before the erase */
3087 target_call_event_callbacks(target
,
3088 TARGET_EVENT_GDB_FLASH_ERASE_START
);
3090 /* vFlashErase:addr,length messages require region start and
3091 * end to be "block" aligned ... if padding is ever needed,
3092 * GDB will have become dangerously confused.
3094 result
= flash_erase_address_range(target
, false, addr
,
3097 /* perform any target specific operations after the erase */
3098 target_call_event_callbacks(target
,
3099 TARGET_EVENT_GDB_FLASH_ERASE_END
);
3102 if (result
!= ERROR_OK
) {
3103 /* GDB doesn't evaluate the actual error number returned,
3104 * treat a failed erase as an I/O error
3106 gdb_send_error(connection
, EIO
);
3107 LOG_ERROR("flash_erase returned %i", result
);
3109 gdb_put_packet(connection
, "OK", 2);
3114 if (strncmp(packet
, "vFlashWrite:", 12) == 0) {
3117 unsigned long length
;
3118 char const *parse
= packet
+ 12;
3120 if (*parse
== '\0') {
3121 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
3122 return ERROR_SERVER_REMOTE_CLOSED
;
3124 addr
= strtoul(parse
, (char **)&parse
, 16);
3125 if (*(parse
++) != ':') {
3126 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
3127 return ERROR_SERVER_REMOTE_CLOSED
;
3129 length
= packet_size
- (parse
- packet
);
3131 /* create a new image if there isn't already one */
3132 if (gdb_connection
->vflash_image
== NULL
) {
3133 gdb_connection
->vflash_image
= malloc(sizeof(struct image
));
3134 image_open(gdb_connection
->vflash_image
, "", "build");
3137 /* create new section with content from packet buffer */
3138 retval
= image_add_section(gdb_connection
->vflash_image
,
3139 addr
, length
, 0x0, (uint8_t const *)parse
);
3140 if (retval
!= ERROR_OK
)
3143 gdb_put_packet(connection
, "OK", 2);
3148 if (strncmp(packet
, "vFlashDone", 10) == 0) {
3151 /* process the flashing buffer. No need to erase as GDB
3152 * always issues a vFlashErase first. */
3153 target_call_event_callbacks(target
,
3154 TARGET_EVENT_GDB_FLASH_WRITE_START
);
3155 result
= flash_write(target
, gdb_connection
->vflash_image
,
3157 target_call_event_callbacks(target
,
3158 TARGET_EVENT_GDB_FLASH_WRITE_END
);
3159 if (result
!= ERROR_OK
) {
3160 if (result
== ERROR_FLASH_DST_OUT_OF_BANK
)
3161 gdb_put_packet(connection
, "E.memtype", 9);
3163 gdb_send_error(connection
, EIO
);
3165 LOG_DEBUG("wrote %u bytes from vFlash image to flash", (unsigned)written
);
3166 gdb_put_packet(connection
, "OK", 2);
3169 image_close(gdb_connection
->vflash_image
);
3170 free(gdb_connection
->vflash_image
);
3171 gdb_connection
->vflash_image
= NULL
;
3176 gdb_put_packet(connection
, "", 0);
3180 static int gdb_detach(struct connection
*connection
)
3183 * Only reply "OK" to GDB
3184 * it will close the connection and this will trigger a call to
3185 * gdb_connection_closed() that will in turn trigger the event
3186 * TARGET_EVENT_GDB_DETACH
3188 return gdb_put_packet(connection
, "OK", 2);
3191 /* The format of 'F' response packet is
3192 * Fretcode,errno,Ctrl-C flag;call-specific attachment
3194 static int gdb_fileio_response_packet(struct connection
*connection
,
3195 char const *packet
, int packet_size
)
3197 struct target
*target
= get_target_from_connection(connection
);
3199 char *parsing_point
;
3200 int fileio_retcode
= strtoul(packet
+ 1, &separator
, 16);
3201 int fileio_errno
= 0;
3202 bool fileio_ctrl_c
= false;
3207 if (*separator
== ',') {
3208 parsing_point
= separator
+ 1;
3209 fileio_errno
= strtoul(parsing_point
, &separator
, 16);
3210 if (*separator
== ',') {
3211 if (*(separator
+ 1) == 'C') {
3212 /* TODO: process ctrl-c */
3213 fileio_ctrl_c
= true;
3218 LOG_DEBUG("File-I/O response, retcode: 0x%x, errno: 0x%x, ctrl-c: %s",
3219 fileio_retcode
, fileio_errno
, fileio_ctrl_c
? "true" : "false");
3221 retval
= target_gdb_fileio_end(target
, fileio_retcode
, fileio_errno
, fileio_ctrl_c
);
3222 if (retval
!= ERROR_OK
)
3225 /* After File-I/O ends, keep continue or step */
3226 if (gdb_running_type
== 'c')
3227 retval
= target_resume(target
, 1, 0x0, 0, 0);
3228 else if (gdb_running_type
== 's')
3229 retval
= target_step(target
, 1, 0x0, 0);
3231 retval
= ERROR_FAIL
;
3233 if (retval
!= ERROR_OK
)
3239 static void gdb_log_callback(void *priv
, const char *file
, unsigned line
,
3240 const char *function
, const char *string
)
3242 struct connection
*connection
= priv
;
3243 struct gdb_connection
*gdb_con
= connection
->priv
;
3245 if (gdb_con
->busy
) {
3246 /* do not reply this using the O packet */
3250 gdb_output_con(connection
, string
);
3253 static void gdb_sig_halted(struct connection
*connection
)
3256 snprintf(sig_reply
, 4, "T%2.2x", 2);
3257 gdb_put_packet(connection
, sig_reply
, 3);
3260 static int gdb_input_inner(struct connection
*connection
)
3262 /* Do not allocate this on the stack */
3263 static char gdb_packet_buffer
[GDB_BUFFER_SIZE
+ 1]; /* Extra byte for null-termination */
3265 struct target
*target
;
3266 char const *packet
= gdb_packet_buffer
;
3269 struct gdb_connection
*gdb_con
= connection
->priv
;
3270 static bool warn_use_ext
;
3272 target
= get_target_from_connection(connection
);
3274 /* drain input buffer. If one of the packets fail, then an error
3275 * packet is replied, if applicable.
3277 * This loop will terminate and the error code is returned.
3279 * The calling fn will check if this error is something that
3280 * can be recovered from, or if the connection must be closed.
3282 * If the error is recoverable, this fn is called again to
3283 * drain the rest of the buffer.
3286 packet_size
= GDB_BUFFER_SIZE
;
3287 retval
= gdb_get_packet(connection
, gdb_packet_buffer
, &packet_size
);
3288 if (retval
!= ERROR_OK
)
3291 /* terminate with zero */
3292 gdb_packet_buffer
[packet_size
] = '\0';
3294 gdb_log_incoming_packet(gdb_packet_buffer
);
3296 if (packet_size
> 0) {
3298 switch (packet
[0]) {
3299 case 'T': /* Is thread alive? */
3300 gdb_thread_packet(connection
, packet
, packet_size
);
3302 case 'H': /* Set current thread ( 'c' for step and continue,
3303 * 'g' for all other operations ) */
3304 gdb_thread_packet(connection
, packet
, packet_size
);
3308 retval
= gdb_thread_packet(connection
, packet
, packet_size
);
3309 if (retval
== GDB_THREAD_PACKET_NOT_CONSUMED
)
3310 retval
= gdb_query_packet(connection
, packet
, packet_size
);
3313 retval
= gdb_get_registers_packet(connection
, packet
, packet_size
);
3316 retval
= gdb_set_registers_packet(connection
, packet
, packet_size
);
3319 retval
= gdb_get_register_packet(connection
, packet
, packet_size
);
3322 retval
= gdb_set_register_packet(connection
, packet
, packet_size
);
3325 retval
= gdb_read_memory_packet(connection
, packet
, packet_size
);
3328 retval
= gdb_write_memory_packet(connection
, packet
, packet_size
);
3332 retval
= gdb_breakpoint_watchpoint_packet(connection
, packet
, packet_size
);
3335 gdb_last_signal_packet(connection
, packet
, packet_size
);
3336 /* '?' is sent after the eventual '!' */
3337 if (!warn_use_ext
&& !gdb_con
->extended_protocol
) {
3338 warn_use_ext
= true;
3339 LOG_WARNING("Prefer GDB command \"target extended-remote :%s\" instead of \"target remote :%s\"",
3340 connection
->service
->port
, connection
->service
->port
);
3346 gdb_thread_packet(connection
, packet
, packet_size
);
3347 log_add_callback(gdb_log_callback
, connection
);
3349 if (gdb_con
->mem_write_error
) {
3350 LOG_ERROR("Memory write failure!");
3352 /* now that we have reported the memory write error,
3353 * we can clear the condition */
3354 gdb_con
->mem_write_error
= false;
3357 bool nostep
= false;
3358 bool already_running
= false;
3359 if (target
->state
== TARGET_RUNNING
) {
3360 LOG_WARNING("WARNING! The target is already running. "
3361 "All changes GDB did to registers will be discarded! "
3362 "Waiting for target to halt.");
3363 already_running
= true;
3364 } else if (target
->state
!= TARGET_HALTED
) {
3365 LOG_WARNING("The target is not in the halted nor running stated, "
3366 "stepi/continue ignored.");
3368 } else if ((packet
[0] == 's') && gdb_con
->sync
) {
3369 /* Hmm..... when you issue a continue in GDB, then a "stepi" is
3370 * sent by GDB first to OpenOCD, thus defeating the check to
3371 * make only the single stepping have the sync feature...
3374 LOG_DEBUG("stepi ignored. GDB will now fetch the register state "
3375 "from the target.");
3377 gdb_con
->sync
= false;
3379 if (!already_running
&& nostep
) {
3380 /* Either the target isn't in the halted state, then we can't
3381 * step/continue. This might be early setup, etc.
3383 * Or we want to allow GDB to pick up a fresh set of
3384 * register values without modifying the target state.
3387 gdb_sig_halted(connection
);
3389 /* stop forwarding log packets! */
3390 log_remove_callback(gdb_log_callback
, connection
);
3392 /* We're running/stepping, in which case we can
3393 * forward log output until the target is halted
3395 gdb_con
->frontend_state
= TARGET_RUNNING
;
3396 target_call_event_callbacks(target
, TARGET_EVENT_GDB_START
);
3398 if (!already_running
) {
3399 /* Here we don't want packet processing to stop even if this fails,
3400 * so we use a local variable instead of retval. */
3401 retval
= gdb_step_continue_packet(connection
, packet
, packet_size
);
3402 if (retval
!= ERROR_OK
) {
3403 /* we'll never receive a halted
3404 * condition... issue a false one..
3406 gdb_frontend_halted(target
, connection
);
3413 retval
= gdb_v_packet(connection
, packet
, packet_size
);
3416 retval
= gdb_detach(connection
);
3419 retval
= gdb_write_memory_binary_packet(connection
, packet
, packet_size
);
3420 if (retval
!= ERROR_OK
)
3424 if (gdb_con
->extended_protocol
) {
3425 gdb_con
->attached
= false;
3428 gdb_put_packet(connection
, "OK", 2);
3429 return ERROR_SERVER_REMOTE_CLOSED
;
3431 /* handle extended remote protocol */
3432 gdb_con
->extended_protocol
= true;
3433 gdb_put_packet(connection
, "OK", 2);
3436 /* handle extended restart packet */
3437 gdb_restart_inferior(connection
, packet
, packet_size
);
3441 /* packet supported only by smp target i.e cortex_a.c*/
3442 /* handle smp packet replying coreid played to gbd */
3443 gdb_read_smp_packet(connection
, packet
, packet_size
);
3447 /* packet supported only by smp target i.e cortex_a.c */
3448 /* handle smp packet setting coreid to be played at next
3450 gdb_write_smp_packet(connection
, packet
, packet_size
);
3454 /* File-I/O extension */
3455 /* After gdb uses host-side syscall to complete target file
3456 * I/O, gdb sends host-side syscall return value to target
3458 * The format of 'F' response packet is
3459 * Fretcode,errno,Ctrl-C flag;call-specific attachment
3461 gdb_con
->frontend_state
= TARGET_RUNNING
;
3462 log_add_callback(gdb_log_callback
, connection
);
3463 gdb_fileio_response_packet(connection
, packet
, packet_size
);
3467 /* ignore unknown packets */
3468 LOG_DEBUG("ignoring 0x%2.2x packet", packet
[0]);
3469 gdb_put_packet(connection
, "", 0);
3473 /* if a packet handler returned an error, exit input loop */
3474 if (retval
!= ERROR_OK
)
3478 if (gdb_con
->ctrl_c
) {
3479 if (target
->state
== TARGET_RUNNING
) {
3480 struct target
*t
= target
;
3482 target
->rtos
->gdb_target_for_threadid(connection
, target
->rtos
->current_threadid
, &t
);
3483 retval
= target_halt(t
);
3484 if (retval
== ERROR_OK
)
3485 retval
= target_poll(t
);
3486 if (retval
!= ERROR_OK
)
3487 target_call_event_callbacks(target
, TARGET_EVENT_GDB_HALT
);
3488 gdb_con
->ctrl_c
= false;
3490 LOG_INFO("The target is not running when halt was requested, stopping GDB.");
3491 target_call_event_callbacks(target
, TARGET_EVENT_GDB_HALT
);
3495 } while (gdb_con
->buf_cnt
> 0);
3500 static int gdb_input(struct connection
*connection
)
3502 int retval
= gdb_input_inner(connection
);
3503 struct gdb_connection
*gdb_con
= connection
->priv
;
3504 if (retval
== ERROR_SERVER_REMOTE_CLOSED
)
3507 /* logging does not propagate the error, yet can set the gdb_con->closed flag */
3508 if (gdb_con
->closed
)
3509 return ERROR_SERVER_REMOTE_CLOSED
;
3511 /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
3515 static int gdb_target_start(struct target
*target
, const char *port
)
3517 struct gdb_service
*gdb_service
;
3519 gdb_service
= malloc(sizeof(struct gdb_service
));
3521 if (NULL
== gdb_service
)
3524 LOG_INFO("starting gdb server for %s on %s", target_name(target
), port
);
3526 gdb_service
->target
= target
;
3527 gdb_service
->core
[0] = -1;
3528 gdb_service
->core
[1] = -1;
3529 target
->gdb_service
= gdb_service
;
3531 ret
= add_service("gdb",
3532 port
, target
->gdb_max_connections
, &gdb_new_connection
, &gdb_input
,
3533 &gdb_connection_closed
, gdb_service
);
3534 /* initialize all targets gdb service with the same pointer */
3536 struct target_list
*head
;
3537 struct target
*curr
;
3538 head
= target
->head
;
3539 while (head
!= (struct target_list
*)NULL
) {
3540 curr
= head
->target
;
3542 curr
->gdb_service
= gdb_service
;
3549 static int gdb_target_add_one(struct target
*target
)
3551 /* one gdb instance per smp list */
3552 if ((target
->smp
) && (target
->gdb_service
))
3555 /* skip targets that cannot handle a gdb connections (e.g. mem_ap) */
3556 if (!target_supports_gdb_connection(target
)) {
3557 LOG_DEBUG("skip gdb server for target %s", target_name(target
));
3561 if (target
->gdb_port_override
) {
3562 if (strcmp(target
->gdb_port_override
, "disabled") == 0) {
3563 LOG_INFO("gdb port disabled");
3566 return gdb_target_start(target
, target
->gdb_port_override
);
3569 if (strcmp(gdb_port
, "disabled") == 0) {
3570 LOG_INFO("gdb port disabled");
3574 int retval
= gdb_target_start(target
, gdb_port_next
);
3575 if (retval
== ERROR_OK
) {
3576 /* save the port number so can be queried with
3577 * $target_name cget -gdb-port
3579 target
->gdb_port_override
= strdup(gdb_port_next
);
3582 /* If we can parse the port number
3583 * then we increment the port number for the next target.
3586 portnumber
= strtol(gdb_port_next
, &end
, 0);
3588 if (parse_long(gdb_port_next
, &portnumber
) == ERROR_OK
) {
3589 free(gdb_port_next
);
3591 gdb_port_next
= alloc_printf("%ld", portnumber
+1);
3593 /* Don't increment if gdb_port is 0, since we're just
3594 * trying to allocate an unused port. */
3595 gdb_port_next
= strdup("0");
3603 int gdb_target_add_all(struct target
*target
)
3605 if (NULL
== target
) {
3606 LOG_WARNING("gdb services need one or more targets defined");
3610 while (NULL
!= target
) {
3611 int retval
= gdb_target_add_one(target
);
3612 if (ERROR_OK
!= retval
)
3615 target
= target
->next
;
3621 COMMAND_HANDLER(handle_gdb_sync_command
)
3624 return ERROR_COMMAND_SYNTAX_ERROR
;
3626 if (current_gdb_connection
== NULL
) {
3628 "gdb_sync command can only be run from within gdb using \"monitor gdb_sync\"");
3632 current_gdb_connection
->sync
= true;
3637 /* daemon configuration command gdb_port */
3638 COMMAND_HANDLER(handle_gdb_port_command
)
3640 int retval
= CALL_COMMAND_HANDLER(server_pipe_command
, &gdb_port
);
3641 if (ERROR_OK
== retval
) {
3642 free(gdb_port_next
);
3643 gdb_port_next
= strdup(gdb_port
);
3648 COMMAND_HANDLER(handle_gdb_memory_map_command
)
3651 return ERROR_COMMAND_SYNTAX_ERROR
;
3653 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], gdb_use_memory_map
);
3657 COMMAND_HANDLER(handle_gdb_flash_program_command
)
3660 return ERROR_COMMAND_SYNTAX_ERROR
;
3662 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], gdb_flash_program
);
3666 COMMAND_HANDLER(handle_gdb_report_data_abort_command
)
3669 return ERROR_COMMAND_SYNTAX_ERROR
;
3671 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], gdb_report_data_abort
);
3675 COMMAND_HANDLER(handle_gdb_report_register_access_error
)
3678 return ERROR_COMMAND_SYNTAX_ERROR
;
3680 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], gdb_report_register_access_error
);
3684 /* gdb_breakpoint_override */
3685 COMMAND_HANDLER(handle_gdb_breakpoint_override_command
)
3687 if (CMD_ARGC
== 0) {
3689 } else if (CMD_ARGC
== 1) {
3690 gdb_breakpoint_override
= 1;
3691 if (strcmp(CMD_ARGV
[0], "hard") == 0)
3692 gdb_breakpoint_override_type
= BKPT_HARD
;
3693 else if (strcmp(CMD_ARGV
[0], "soft") == 0)
3694 gdb_breakpoint_override_type
= BKPT_SOFT
;
3695 else if (strcmp(CMD_ARGV
[0], "disable") == 0)
3696 gdb_breakpoint_override
= 0;
3698 return ERROR_COMMAND_SYNTAX_ERROR
;
3699 if (gdb_breakpoint_override
)
3700 LOG_USER("force %s breakpoints",
3701 (gdb_breakpoint_override_type
== BKPT_HARD
) ? "hard" : "soft");
3703 LOG_USER("breakpoint type is not overridden");
3708 COMMAND_HANDLER(handle_gdb_target_description_command
)
3711 return ERROR_COMMAND_SYNTAX_ERROR
;
3713 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], gdb_use_target_description
);
3717 COMMAND_HANDLER(handle_gdb_save_tdesc_command
)
3720 uint32_t tdesc_length
;
3721 struct target
*target
= get_current_target(CMD_CTX
);
3723 int retval
= gdb_generate_target_description(target
, &tdesc
);
3724 if (retval
!= ERROR_OK
) {
3725 LOG_ERROR("Unable to Generate Target Description");
3729 tdesc_length
= strlen(tdesc
);
3731 struct fileio
*fileio
;
3732 size_t size_written
;
3734 char *tdesc_filename
= alloc_printf("%s.xml", target_type_name(target
));
3735 if (tdesc_filename
== NULL
) {
3736 retval
= ERROR_FAIL
;
3740 retval
= fileio_open(&fileio
, tdesc_filename
, FILEIO_WRITE
, FILEIO_TEXT
);
3742 if (retval
!= ERROR_OK
) {
3743 LOG_ERROR("Can't open %s for writing", tdesc_filename
);
3747 retval
= fileio_write(fileio
, tdesc_length
, tdesc
, &size_written
);
3749 fileio_close(fileio
);
3751 if (retval
!= ERROR_OK
)
3752 LOG_ERROR("Error while writing the tdesc file");
3755 free(tdesc_filename
);
3761 static const struct command_registration gdb_command_handlers
[] = {
3764 .handler
= handle_gdb_sync_command
,
3765 .mode
= COMMAND_ANY
,
3766 .help
= "next stepi will return immediately allowing "
3767 "GDB to fetch register state without affecting "
3773 .handler
= handle_gdb_port_command
,
3774 .mode
= COMMAND_CONFIG
,
3775 .help
= "Normally gdb listens to a TCP/IP port. Each subsequent GDB "
3776 "server listens for the next port number after the "
3777 "base port number specified. "
3778 "No arguments reports GDB port. \"pipe\" means listen to stdin "
3779 "output to stdout, an integer is base port number, \"disabled\" disables "
3780 "port. Any other string is are interpreted as named pipe to listen to. "
3781 "Output pipe is the same name as input pipe, but with 'o' appended.",
3782 .usage
= "[port_num]",
3785 .name
= "gdb_memory_map",
3786 .handler
= handle_gdb_memory_map_command
,
3787 .mode
= COMMAND_CONFIG
,
3788 .help
= "enable or disable memory map",
3789 .usage
= "('enable'|'disable')"
3792 .name
= "gdb_flash_program",
3793 .handler
= handle_gdb_flash_program_command
,
3794 .mode
= COMMAND_CONFIG
,
3795 .help
= "enable or disable flash program",
3796 .usage
= "('enable'|'disable')"
3799 .name
= "gdb_report_data_abort",
3800 .handler
= handle_gdb_report_data_abort_command
,
3801 .mode
= COMMAND_CONFIG
,
3802 .help
= "enable or disable reporting data aborts",
3803 .usage
= "('enable'|'disable')"
3806 .name
= "gdb_report_register_access_error",
3807 .handler
= handle_gdb_report_register_access_error
,
3808 .mode
= COMMAND_CONFIG
,
3809 .help
= "enable or disable reporting register access errors",
3810 .usage
= "('enable'|'disable')"
3813 .name
= "gdb_breakpoint_override",
3814 .handler
= handle_gdb_breakpoint_override_command
,
3815 .mode
= COMMAND_ANY
,
3816 .help
= "Display or specify type of breakpoint "
3817 "to be used by gdb 'break' commands.",
3818 .usage
= "('hard'|'soft'|'disable')"
3821 .name
= "gdb_target_description",
3822 .handler
= handle_gdb_target_description_command
,
3823 .mode
= COMMAND_CONFIG
,
3824 .help
= "enable or disable target description",
3825 .usage
= "('enable'|'disable')"
3828 .name
= "gdb_save_tdesc",
3829 .handler
= handle_gdb_save_tdesc_command
,
3830 .mode
= COMMAND_EXEC
,
3831 .help
= "Save the target description file",
3834 COMMAND_REGISTRATION_DONE
3837 int gdb_register_commands(struct command_context
*cmd_ctx
)
3839 gdb_port
= strdup("3333");
3840 gdb_port_next
= strdup("3333");
3841 return register_commands(cmd_ctx
, NULL
, gdb_command_handlers
);
3844 void gdb_service_free(void)
3847 free(gdb_port_next
);