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 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
30 #include <target/breakpoints.h>
31 #include <target/target_request.h>
32 #include <target/register.h>
34 #include <flash/nor/core.h>
35 #include "gdb_server.h"
36 #include <target/image.h>
37 #include <jtag/jtag.h>
42 * GDB server implementation.
44 * This implements the GDB Remote Serial Protocol, over TCP connections,
45 * giving GDB access to the JTAG or other hardware debugging facilities
46 * found in most modern embedded processors.
49 /* private connection data for GDB */
52 char buffer
[GDB_BUFFER_SIZE
];
56 enum target_state frontend_state
;
57 struct image
*vflash_image
;
61 bool sync
; /* set flag to true if you want the next stepi to return immediately.
62 allowing GDB to pick up a fresh set of register values from the target
63 without modifying the target state. */
64 /* We delay reporting memory write errors until next step/continue or memory
65 * write. This improves performance of gdb load significantly as the GDB packet
66 * can be replied immediately and a new GDB packet will be ready without delay
74 #define _DEBUG_GDB_IO_
77 static struct gdb_connection
*current_gdb_connection
;
79 static int gdb_breakpoint_override
;
80 static enum breakpoint_type gdb_breakpoint_override_type
;
82 static int gdb_error(struct connection
*connection
, int retval
);
83 static unsigned short gdb_port
= 3333;
84 static unsigned short gdb_port_next
= 0;
85 static const char DIGITS
[16] = "0123456789abcdef";
87 static void gdb_log_callback(void *priv
, const char *file
, unsigned line
,
88 const char *function
, const char *string
);
90 /* number of gdb connections, mainly to suppress gdb related debugging spam
91 * in helper/log.c when no gdb connections are actually active */
92 int gdb_actual_connections
;
94 /* set if we are sending a memory map to gdb
95 * via qXfer:memory-map:read packet */
96 /* enabled by default*/
97 static int gdb_use_memory_map
= 1;
98 /* enabled by default*/
99 static int gdb_flash_program
= 1;
101 /* if set, data aborts cause an error to be reported in memory read packets
102 * see the code in gdb_read_memory_packet() for further explanations.
103 * Disabled by default.
105 static int gdb_report_data_abort
;
107 static int gdb_last_signal(struct target
*target
)
109 switch (target
->debug_reason
)
111 case DBG_REASON_DBGRQ
:
112 return 0x2; /* SIGINT */
113 case DBG_REASON_BREAKPOINT
:
114 case DBG_REASON_WATCHPOINT
:
115 case DBG_REASON_WPTANDBKPT
:
116 return 0x05; /* SIGTRAP */
117 case DBG_REASON_SINGLESTEP
:
118 return 0x05; /* SIGTRAP */
119 case DBG_REASON_NOTHALTED
:
120 return 0x0; /* no signal... shouldn't happen */
122 LOG_USER("undefined debug reason %d - target needs reset", target
->debug_reason
);
127 static int check_pending(struct connection
*connection
,
128 int timeout_s
, int *got_data
)
130 /* a non-blocking socket will block if there is 0 bytes available on the socket,
131 * but return with as many bytes as are available immediately
135 struct gdb_connection
*gdb_con
= connection
->priv
;
137 if (got_data
== NULL
)
141 if (gdb_con
->buf_cnt
> 0)
148 FD_SET(connection
->fd
, &read_fds
);
150 tv
.tv_sec
= timeout_s
;
152 if (socket_select(connection
->fd
+ 1, &read_fds
, NULL
, NULL
, &tv
) == 0)
154 /* This can typically be because a "monitor" command took too long
155 * before printing any progress messages
159 return ERROR_GDB_TIMEOUT
;
165 *got_data
= FD_ISSET(connection
->fd
, &read_fds
) != 0;
169 static int gdb_get_char_inner(struct connection
*connection
, int* next_char
)
171 struct gdb_connection
*gdb_con
= connection
->priv
;
172 int retval
= ERROR_OK
;
176 if (connection
->service
->type
== CONNECTION_PIPE
)
178 gdb_con
->buf_cnt
= read(connection
->fd
, gdb_con
->buffer
, GDB_BUFFER_SIZE
);
182 retval
= check_pending(connection
, 1, NULL
);
183 if (retval
!= ERROR_OK
)
185 gdb_con
->buf_cnt
= read_socket(connection
->fd
, gdb_con
->buffer
, GDB_BUFFER_SIZE
);
188 if (gdb_con
->buf_cnt
> 0)
192 if (gdb_con
->buf_cnt
== 0)
195 return ERROR_SERVER_REMOTE_CLOSED
;
199 errno
= WSAGetLastError();
206 case WSAECONNABORTED
:
208 return ERROR_SERVER_REMOTE_CLOSED
;
211 return ERROR_SERVER_REMOTE_CLOSED
;
213 LOG_ERROR("read: %d", errno
);
224 return ERROR_SERVER_REMOTE_CLOSED
;
227 return ERROR_SERVER_REMOTE_CLOSED
;
229 LOG_ERROR("read: %s", strerror(errno
));
231 return ERROR_SERVER_REMOTE_CLOSED
;
236 #ifdef _DEBUG_GDB_IO_
237 debug_buffer
= malloc(gdb_con
->buf_cnt
+ 1);
238 memcpy(debug_buffer
, gdb_con
->buffer
, gdb_con
->buf_cnt
);
239 debug_buffer
[gdb_con
->buf_cnt
] = 0;
240 LOG_DEBUG("received '%s'", debug_buffer
);
244 gdb_con
->buf_p
= gdb_con
->buffer
;
246 *next_char
= *(gdb_con
->buf_p
++);
247 if (gdb_con
->buf_cnt
> 0)
248 connection
->input_pending
= 1;
250 connection
->input_pending
= 0;
251 #ifdef _DEBUG_GDB_IO_
252 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char
, *next_char
);
259 * The cool thing about this fn is that it allows buf_p and buf_cnt to be
260 * held in registers in the inner loop.
262 * For small caches and embedded systems this is important!
264 static inline int gdb_get_char_fast(struct connection
*connection
, int* next_char
, char **buf_p
, int *buf_cnt
)
266 int retval
= ERROR_OK
;
268 if ((*buf_cnt
)-- > 0)
270 *next_char
= **buf_p
;
273 connection
->input_pending
= 1;
275 connection
->input_pending
= 0;
277 #ifdef _DEBUG_GDB_IO_
278 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char
, *next_char
);
284 struct gdb_connection
*gdb_con
= connection
->priv
;
285 gdb_con
->buf_p
= *buf_p
;
286 gdb_con
->buf_cnt
= *buf_cnt
;
287 retval
= gdb_get_char_inner(connection
, next_char
);
288 *buf_p
= gdb_con
->buf_p
;
289 *buf_cnt
= gdb_con
->buf_cnt
;
295 static int gdb_get_char(struct connection
*connection
, int* next_char
)
297 struct gdb_connection
*gdb_con
= connection
->priv
;
298 return gdb_get_char_fast(connection
, next_char
, &gdb_con
->buf_p
, &gdb_con
->buf_cnt
);
302 static int gdb_putback_char(struct connection
*connection
, int last_char
)
304 struct gdb_connection
*gdb_con
= connection
->priv
;
306 if (gdb_con
->buf_p
> gdb_con
->buffer
)
308 *(--gdb_con
->buf_p
) = last_char
;
313 LOG_ERROR("BUG: couldn't put character back");
319 /* The only way we can detect that the socket is closed is the first time
320 * we write to it, we will fail. Subsequent write operations will
321 * succeed. Shudder! */
322 static int gdb_write(struct connection
*connection
, void *data
, int len
)
324 struct gdb_connection
*gdb_con
= connection
->priv
;
326 return ERROR_SERVER_REMOTE_CLOSED
;
328 if (connection
->service
->type
== CONNECTION_PIPE
)
330 /* write to stdout */
331 if (write(STDOUT_FILENO
, data
, len
) == len
)
338 if (write_socket(connection
->fd
, data
, len
) == len
)
344 return ERROR_SERVER_REMOTE_CLOSED
;
347 static int gdb_put_packet_inner(struct connection
*connection
,
348 char *buffer
, int len
)
351 unsigned char my_checksum
= 0;
352 #ifdef _DEBUG_GDB_IO_
357 struct gdb_connection
*gdb_con
= connection
->priv
;
359 for (i
= 0; i
< len
; i
++)
360 my_checksum
+= buffer
[i
];
362 #ifdef _DEBUG_GDB_IO_
364 * At this point we should have nothing in the input queue from GDB,
365 * however sometimes '-' is sent even though we've already received
366 * an ACK (+) for everything we've sent off.
371 retval
= check_pending(connection
, 0, &gotdata
);
372 if (retval
!= ERROR_OK
)
376 if ((retval
= gdb_get_char(connection
, &reply
)) != ERROR_OK
)
379 /* fix a problem with some IAR tools */
380 gdb_putback_char(connection
, reply
);
381 LOG_DEBUG("Unexpected start of new packet");
385 LOG_WARNING("Discard unexpected char %c", reply
);
391 #ifdef _DEBUG_GDB_IO_
392 debug_buffer
= malloc(len
+ 1);
393 memcpy(debug_buffer
, buffer
, len
);
394 debug_buffer
[len
] = 0;
395 LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer
, my_checksum
);
399 char local_buffer
[1024];
400 local_buffer
[0] = '$';
401 if ((size_t)len
+ 4 <= sizeof(local_buffer
))
403 /* performance gain on smaller packets by only a single call to gdb_write() */
404 memcpy(local_buffer
+ 1, buffer
, len
++);
405 local_buffer
[len
++] = '#';
406 local_buffer
[len
++] = DIGITS
[(my_checksum
>> 4) & 0xf];
407 local_buffer
[len
++] = DIGITS
[my_checksum
& 0xf];
408 if ((retval
= gdb_write(connection
, local_buffer
, len
)) != ERROR_OK
)
415 /* larger packets are transmitted directly from caller supplied buffer
416 by several calls to gdb_write() to avoid dynamic allocation */
417 local_buffer
[1] = '#';
418 local_buffer
[2] = DIGITS
[(my_checksum
>> 4) & 0xf];
419 local_buffer
[3] = DIGITS
[my_checksum
& 0xf];
420 if ((retval
= gdb_write(connection
, local_buffer
, 1)) != ERROR_OK
)
424 if ((retval
= gdb_write(connection
, buffer
, len
)) != ERROR_OK
)
428 if ((retval
= gdb_write(connection
, local_buffer
+ 1, 3)) != ERROR_OK
)
434 if (gdb_con
->noack_mode
)
437 if ((retval
= gdb_get_char(connection
, &reply
)) != ERROR_OK
)
442 else if (reply
== '-')
444 /* Stop sending output packets for now */
445 log_remove_callback(gdb_log_callback
, connection
);
446 LOG_WARNING("negative reply, retrying");
448 else if (reply
== 0x3)
451 if ((retval
= gdb_get_char(connection
, &reply
)) != ERROR_OK
)
455 else if (reply
== '-')
457 /* Stop sending output packets for now */
458 log_remove_callback(gdb_log_callback
, connection
);
459 LOG_WARNING("negative reply, retrying");
461 else if (reply
== '$') {
462 LOG_ERROR("GDB missing ack(1) - assumed good");
463 gdb_putback_char(connection
, reply
);
467 LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply
);
469 return ERROR_SERVER_REMOTE_CLOSED
;
472 else if (reply
== '$') {
473 LOG_ERROR("GDB missing ack(2) - assumed good");
474 gdb_putback_char(connection
, reply
);
479 LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection", reply
);
481 return ERROR_SERVER_REMOTE_CLOSED
;
485 return ERROR_SERVER_REMOTE_CLOSED
;
490 static int gdb_put_packet(struct connection
*connection
, char *buffer
, int len
)
492 struct gdb_connection
*gdb_con
= connection
->priv
;
494 int retval
= gdb_put_packet_inner(connection
, buffer
, len
);
497 /* we sent some data, reset timer for keep alive messages */
503 static __inline__
int fetch_packet(struct connection
*connection
, int *checksum_ok
, int noack
, int *len
, char *buffer
)
505 unsigned char my_checksum
= 0;
508 int retval
= ERROR_OK
;
510 struct gdb_connection
*gdb_con
= connection
->priv
;
515 /* move this over into local variables to use registers and give the
516 * more freedom to optimize */
517 char *buf_p
= gdb_con
->buf_p
;
518 int buf_cnt
= gdb_con
->buf_cnt
;
522 /* The common case is that we have an entire packet with no escape chars.
523 * We need to leave at least 2 bytes in the buffer to have
524 * gdb_get_char() update various bits and bobs correctly.
526 if ((buf_cnt
> 2) && ((buf_cnt
+ count
) < *len
))
528 /* The compiler will struggle a bit with constant propagation and
529 * aliasing, so we help it by showing that these values do not
530 * change inside the loop
534 int run
= buf_cnt
- 2;
541 if (character
== '#')
543 /* Danger! character can be '#' when esc is
544 * used so we need an explicit boolean for done here.
550 if (character
== '}')
552 /* data transmitted in binary mode (X packet)
553 * uses 0x7d as escape character */
554 my_checksum
+= character
& 0xff;
557 my_checksum
+= character
& 0xff;
558 buffer
[count
++] = (character
^ 0x20) & 0xff;
562 my_checksum
+= character
& 0xff;
563 buffer
[count
++] = character
& 0xff;
573 LOG_ERROR("packet buffer too small");
574 retval
= ERROR_GDB_BUFFER_TOO_SMALL
;
578 retval
= gdb_get_char_fast(connection
, &character
, &buf_p
, &buf_cnt
);
579 if (retval
!= ERROR_OK
)
582 if (character
== '#')
585 if (character
== '}')
587 /* data transmitted in binary mode (X packet)
588 * uses 0x7d as escape character */
589 my_checksum
+= character
& 0xff;
591 retval
= gdb_get_char_fast(connection
, &character
, &buf_p
, &buf_cnt
);
592 if (retval
!= ERROR_OK
)
595 my_checksum
+= character
& 0xff;
596 buffer
[count
++] = (character
^ 0x20) & 0xff;
600 my_checksum
+= character
& 0xff;
601 buffer
[count
++] = character
& 0xff;
605 gdb_con
->buf_p
= buf_p
;
606 gdb_con
->buf_cnt
= buf_cnt
;
608 if (retval
!= ERROR_OK
)
613 if ((retval
= gdb_get_char(connection
, &character
)) != ERROR_OK
)
615 checksum
[0] = character
;
616 if ((retval
= gdb_get_char(connection
, &character
)) != ERROR_OK
)
618 checksum
[1] = character
;
623 *checksum_ok
= (my_checksum
== strtoul(checksum
, NULL
, 16));
629 static int gdb_get_packet_inner(struct connection
*connection
,
630 char *buffer
, int *len
)
634 struct gdb_connection
*gdb_con
= connection
->priv
;
640 if ((retval
= gdb_get_char(connection
, &character
)) != ERROR_OK
)
643 #ifdef _DEBUG_GDB_IO_
644 LOG_DEBUG("character: '%c'", character
);
652 /* gdb sends a dummy ack '+' at every remote connect - see remote_start_remote (remote.c)
653 * in case anyone tries to debug why they receive this warning every time */
654 LOG_WARNING("acknowledgment received, but no packet pending");
657 LOG_WARNING("negative acknowledgment, but no packet pending");
664 LOG_WARNING("ignoring character 0x%x", character
);
667 } while (character
!= '$');
672 /* explicit code expansion here to get faster inlined code in -O3 by not
673 * calculating checksum
675 if (gdb_con
->noack_mode
)
677 if ((retval
= fetch_packet(connection
, &checksum_ok
, 1, len
, buffer
)) != ERROR_OK
)
681 if ((retval
= fetch_packet(connection
, &checksum_ok
, 0, len
, buffer
)) != ERROR_OK
)
685 if (gdb_con
->noack_mode
)
687 /* checksum is not checked in noack mode */
692 if ((retval
= gdb_write(connection
, "+", 1)) != ERROR_OK
)
700 return ERROR_SERVER_REMOTE_CLOSED
;
705 static int gdb_get_packet(struct connection
*connection
, char *buffer
, int *len
)
707 struct gdb_connection
*gdb_con
= connection
->priv
;
709 int retval
= gdb_get_packet_inner(connection
, buffer
, len
);
714 static int gdb_output_con(struct connection
*connection
, const char* line
)
719 bin_size
= strlen(line
);
721 hex_buffer
= malloc(bin_size
*2 + 2);
722 if (hex_buffer
== NULL
)
723 return ERROR_GDB_BUFFER_TOO_SMALL
;
726 for (i
= 0; i
< bin_size
; i
++)
727 snprintf(hex_buffer
+ 1 + i
*2, 3, "%2.2x", line
[i
]);
728 hex_buffer
[bin_size
*2 + 1] = 0;
730 int retval
= gdb_put_packet(connection
, hex_buffer
, bin_size
*2 + 1);
736 static int gdb_output(struct command_context
*context
, const char* line
)
738 /* this will be dumped to the log and also sent as an O packet if possible */
739 LOG_USER_N("%s", line
);
744 static void gdb_frontend_halted(struct target
*target
, struct connection
*connection
)
746 struct gdb_connection
*gdb_connection
= connection
->priv
;
748 /* In the GDB protocol when we are stepping or continuing execution,
749 * we have a lingering reply. Upon receiving a halted event
750 * when we have that lingering packet, we reply to the original
751 * step or continue packet.
753 * Executing monitor commands can bring the target in and
754 * out of the running state so we'll see lots of TARGET_EVENT_XXX
755 * that are to be ignored.
757 if (gdb_connection
->frontend_state
== TARGET_RUNNING
)
762 /* stop forwarding log packets! */
763 log_remove_callback(gdb_log_callback
, connection
);
765 if (gdb_connection
->ctrl_c
)
768 gdb_connection
->ctrl_c
= 0;
772 signal
= gdb_last_signal(target
);
775 snprintf(sig_reply
, 4, "T%2.2x", signal
);
776 gdb_put_packet(connection
, sig_reply
, 3);
777 gdb_connection
->frontend_state
= TARGET_HALTED
;
781 static int gdb_target_callback_event_handler(struct target
*target
,
782 enum target_event event
, void *priv
)
785 struct connection
*connection
= priv
;
787 target_handle_event(target
, event
);
790 case TARGET_EVENT_GDB_HALT
:
791 gdb_frontend_halted(target
, connection
);
793 case TARGET_EVENT_HALTED
:
794 target_call_event_callbacks(target
, TARGET_EVENT_GDB_END
);
796 case TARGET_EVENT_GDB_FLASH_ERASE_START
:
797 target_handle_event(target
, TARGET_EVENT_OLD_gdb_program_config
);
798 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
810 static int gdb_new_connection(struct connection
*connection
)
812 struct gdb_connection
*gdb_connection
= malloc(sizeof(struct gdb_connection
));
813 struct gdb_service
*gdb_service
= connection
->service
->priv
;
817 connection
->priv
= gdb_connection
;
819 /* initialize gdb connection information */
820 gdb_connection
->buf_p
= gdb_connection
->buffer
;
821 gdb_connection
->buf_cnt
= 0;
822 gdb_connection
->ctrl_c
= 0;
823 gdb_connection
->frontend_state
= TARGET_HALTED
;
824 gdb_connection
->vflash_image
= NULL
;
825 gdb_connection
->closed
= 0;
826 gdb_connection
->busy
= 0;
827 gdb_connection
->noack_mode
= 0;
828 gdb_connection
->sync
= true;
829 gdb_connection
->mem_write_error
= false;
831 /* send ACK to GDB for debug request */
832 gdb_write(connection
, "+", 1);
834 /* output goes through gdb connection */
835 command_set_output_handler(connection
->cmd_ctx
, gdb_output
, connection
);
837 /* we must remove all breakpoints registered to the target as a previous
838 * GDB session could leave dangling breakpoints if e.g. communication
841 breakpoint_clear_target(gdb_service
->target
);
842 watchpoint_clear_target(gdb_service
->target
);
844 /* register callback to be informed about target events */
845 target_register_event_callback(gdb_target_callback_event_handler
, connection
);
847 /* remove the initial ACK from the incoming buffer */
848 if ((retval
= gdb_get_char(connection
, &initial_ack
)) != ERROR_OK
)
851 /* FIX!!!??? would we actually ever receive a + here???
854 if (initial_ack
!= '+')
855 gdb_putback_char(connection
, initial_ack
);
856 target_call_event_callbacks(gdb_service
->target
, TARGET_EVENT_GDB_ATTACH
);
858 if (gdb_use_memory_map
)
860 /* Connect must fail if the memory map can't be set up correctly.
862 * This will cause an auto_probe to be invoked, which is either
863 * a no-op or it will fail when the target isn't ready(e.g. not halted).
866 for (i
= 0; i
< flash_get_bank_count(); i
++)
868 struct flash_bank
*p
;
869 retval
= get_flash_bank_by_num(i
, &p
);
870 if (retval
!= ERROR_OK
)
872 LOG_ERROR("Connect failed. Consider setting up a gdb-attach event for the target to prepare target for GDB connect.");
878 gdb_actual_connections
++;
879 LOG_DEBUG("New GDB Connection: %d, Target %s, state: %s",
880 gdb_actual_connections
,
881 target_name(gdb_service
->target
),
882 target_state_name(gdb_service
->target
));
887 static int gdb_connection_closed(struct connection
*connection
)
889 struct gdb_service
*gdb_service
= connection
->service
->priv
;
890 struct gdb_connection
*gdb_connection
= connection
->priv
;
892 /* we're done forwarding messages. Tear down callback before
893 * cleaning up connection.
895 log_remove_callback(gdb_log_callback
, connection
);
897 gdb_actual_connections
--;
898 LOG_DEBUG("GDB Close, Target: %s, state: %s, gdb_actual_connections=%d",
899 target_name(gdb_service
->target
),
900 target_state_name(gdb_service
->target
),
901 gdb_actual_connections
);
903 /* see if an image built with vFlash commands is left */
904 if (gdb_connection
->vflash_image
)
906 image_close(gdb_connection
->vflash_image
);
907 free(gdb_connection
->vflash_image
);
908 gdb_connection
->vflash_image
= NULL
;
911 /* if this connection registered a debug-message receiver delete it */
912 delete_debug_msg_receiver(connection
->cmd_ctx
, gdb_service
->target
);
914 if (connection
->priv
)
916 free(connection
->priv
);
917 connection
->priv
= NULL
;
921 LOG_ERROR("BUG: connection->priv == NULL");
925 target_unregister_event_callback(gdb_target_callback_event_handler
, connection
);
927 target_call_event_callbacks(gdb_service
->target
, TARGET_EVENT_GDB_END
);
929 target_call_event_callbacks(gdb_service
->target
, TARGET_EVENT_GDB_DETACH
);
934 static void gdb_send_error(struct connection
*connection
, uint8_t the_error
)
937 snprintf(err
, 4, "E%2.2X", the_error
);
938 gdb_put_packet(connection
, err
, 3);
941 static int gdb_last_signal_packet(struct connection
*connection
,
942 struct target
*target
, char* packet
, int packet_size
)
947 signal
= gdb_last_signal(target
);
949 snprintf(sig_reply
, 4, "S%2.2x", signal
);
950 gdb_put_packet(connection
, sig_reply
, 3);
955 static int gdb_reg_pos(struct target
*target
, int pos
, int len
)
957 if (target
->endianness
== TARGET_LITTLE_ENDIAN
)
960 return len
- 1 - pos
;
963 /* Convert register to string of bytes. NB! The # of bits in the
964 * register might be non-divisible by 8(a byte), in which
965 * case an entire byte is shown.
967 * NB! the format on the wire is the target endianness
969 * The format of reg->value is little endian
972 static void gdb_str_to_target(struct target
*target
,
973 char *tstr
, struct reg
*reg
)
980 buf_len
= DIV_ROUND_UP(reg
->size
, 8);
982 for (i
= 0; i
< buf_len
; i
++)
984 int j
= gdb_reg_pos(target
, i
, buf_len
);
985 tstr
[i
*2] = DIGITS
[(buf
[j
]>>4) & 0xf];
986 tstr
[i
*2 + 1] = DIGITS
[buf
[j
]&0xf];
990 static int hextoint(int c
)
1001 LOG_ERROR("BUG: invalid register value %08x", c
);
1005 /* copy over in register buffer */
1006 static void gdb_target_to_reg(struct target
*target
,
1007 char *tstr
, int str_len
, uint8_t *bin
)
1011 LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
1016 for (i
= 0; i
< str_len
; i
+= 2)
1018 uint8_t t
= hextoint(tstr
[i
]) << 4;
1019 t
|= hextoint(tstr
[i
+ 1]);
1021 int j
= gdb_reg_pos(target
, i
/2, str_len
/2);
1026 static int gdb_get_registers_packet(struct connection
*connection
,
1027 struct target
*target
, char* packet
, int packet_size
)
1029 struct reg
**reg_list
;
1032 int reg_packet_size
= 0;
1037 #ifdef _DEBUG_GDB_IO_
1041 if ((retval
= target_get_gdb_reg_list(target
, ®_list
, ®_list_size
)) != ERROR_OK
)
1043 return gdb_error(connection
, retval
);
1046 for (i
= 0; i
< reg_list_size
; i
++)
1048 reg_packet_size
+= reg_list
[i
]->size
;
1051 reg_packet
= malloc(DIV_ROUND_UP(reg_packet_size
, 8) * 2);
1052 reg_packet_p
= reg_packet
;
1054 for (i
= 0; i
< reg_list_size
; i
++)
1056 gdb_str_to_target(target
, reg_packet_p
, reg_list
[i
]);
1057 reg_packet_p
+= DIV_ROUND_UP(reg_list
[i
]->size
, 8) * 2;
1060 #ifdef _DEBUG_GDB_IO_
1063 reg_packet_p
= strndup(reg_packet
, DIV_ROUND_UP(reg_packet_size
, 8) * 2);
1064 LOG_DEBUG("reg_packet: %s", reg_packet_p
);
1069 gdb_put_packet(connection
, reg_packet
, DIV_ROUND_UP(reg_packet_size
, 8) * 2);
1077 static int gdb_set_registers_packet(struct connection
*connection
,
1078 struct target
*target
, char *packet
, int packet_size
)
1081 struct reg
**reg_list
;
1086 #ifdef _DEBUG_GDB_IO_
1090 /* skip command character */
1094 if (packet_size
% 2)
1096 LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection");
1097 return ERROR_SERVER_REMOTE_CLOSED
;
1100 if ((retval
= target_get_gdb_reg_list(target
, ®_list
, ®_list_size
)) != ERROR_OK
)
1102 return gdb_error(connection
, retval
);
1106 for (i
= 0; i
< reg_list_size
; i
++)
1109 int chars
= (DIV_ROUND_UP(reg_list
[i
]->size
, 8) * 2);
1111 if (packet_p
+ chars
> packet
+ packet_size
)
1113 LOG_ERROR("BUG: register packet is too small for registers");
1116 bin_buf
= malloc(DIV_ROUND_UP(reg_list
[i
]->size
, 8));
1117 gdb_target_to_reg(target
, packet_p
, chars
, bin_buf
);
1119 reg_list
[i
]->type
->set(reg_list
[i
], bin_buf
);
1121 /* advance packet pointer */
1128 /* free struct reg *reg_list[] array allocated by get_gdb_reg_list */
1131 gdb_put_packet(connection
, "OK", 2);
1136 static int gdb_get_register_packet(struct connection
*connection
,
1137 struct target
*target
, char *packet
, int packet_size
)
1140 int reg_num
= strtoul(packet
+ 1, NULL
, 16);
1141 struct reg
**reg_list
;
1145 #ifdef _DEBUG_GDB_IO_
1149 if ((retval
= target_get_gdb_reg_list(target
, ®_list
, ®_list_size
)) != ERROR_OK
)
1151 return gdb_error(connection
, retval
);
1154 if (reg_list_size
<= reg_num
)
1156 LOG_ERROR("gdb requested a non-existing register");
1160 reg_packet
= malloc(DIV_ROUND_UP(reg_list
[reg_num
]->size
, 8) * 2);
1162 gdb_str_to_target(target
, reg_packet
, reg_list
[reg_num
]);
1164 gdb_put_packet(connection
, reg_packet
, DIV_ROUND_UP(reg_list
[reg_num
]->size
, 8) * 2);
1172 static int gdb_set_register_packet(struct connection
*connection
,
1173 struct target
*target
, char *packet
, int packet_size
)
1177 int reg_num
= strtoul(packet
+ 1, &separator
, 16);
1178 struct reg
**reg_list
;
1184 if ((retval
= target_get_gdb_reg_list(target
, ®_list
, ®_list_size
)) != ERROR_OK
)
1186 return gdb_error(connection
, retval
);
1189 if (reg_list_size
< reg_num
)
1191 LOG_ERROR("gdb requested a non-existing register");
1192 return ERROR_SERVER_REMOTE_CLOSED
;
1195 if (*separator
!= '=')
1197 LOG_ERROR("GDB 'set register packet', but no '=' following the register number");
1198 return ERROR_SERVER_REMOTE_CLOSED
;
1201 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
1202 bin_buf
= malloc(DIV_ROUND_UP(reg_list
[reg_num
]->size
, 8));
1203 int chars
= (DIV_ROUND_UP(reg_list
[reg_num
]->size
, 8) * 2);
1205 /* fix!!! add some sanity checks on packet size here */
1207 gdb_target_to_reg(target
, separator
+ 1, chars
, bin_buf
);
1209 reg_list
[reg_num
]->type
->set(reg_list
[reg_num
], bin_buf
);
1211 gdb_put_packet(connection
, "OK", 2);
1219 static int gdb_error(struct connection
*connection
, int retval
)
1223 case ERROR_TARGET_DATA_ABORT
:
1224 gdb_send_error(connection
, EIO
);
1226 case ERROR_TARGET_TRANSLATION_FAULT
:
1227 gdb_send_error(connection
, EFAULT
);
1229 case ERROR_TARGET_UNALIGNED_ACCESS
:
1230 gdb_send_error(connection
, EFAULT
);
1232 case ERROR_TARGET_NOT_HALTED
:
1233 gdb_send_error(connection
, EFAULT
);
1236 /* This could be that the target reset itself. */
1237 LOG_ERROR("unexpected error %i", retval
);
1238 gdb_send_error(connection
, EFAULT
);
1245 /* We don't have to worry about the default 2 second timeout for GDB packets,
1246 * because GDB breaks up large memory reads into smaller reads.
1248 * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
1250 static int gdb_read_memory_packet(struct connection
*connection
,
1251 struct target
*target
, char *packet
, int packet_size
)
1260 int retval
= ERROR_OK
;
1262 /* skip command character */
1265 addr
= strtoul(packet
, &separator
, 16);
1267 if (*separator
!= ',')
1269 LOG_ERROR("incomplete read memory packet received, dropping connection");
1270 return ERROR_SERVER_REMOTE_CLOSED
;
1273 len
= strtoul(separator
+ 1, NULL
, 16);
1275 buffer
= malloc(len
);
1277 LOG_DEBUG("addr: 0x%8.8" PRIx32
", len: 0x%8.8" PRIx32
"", addr
, len
);
1279 retval
= target_read_buffer(target
, addr
, len
, buffer
);
1281 if ((retval
!= ERROR_OK
)&&!gdb_report_data_abort
)
1283 /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
1284 * At some point this might be fixed in GDB, in which case this code can be removed.
1286 * OpenOCD developers are acutely aware of this problem, but there is nothing
1287 * gained by involving the user in this problem that hopefully will get resolved
1290 * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd = view%20audit-trail&database = gdb&pr = 2395
1292 * For now, the default is to fix up things to make current GDB versions work.
1293 * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
1295 memset(buffer
, 0, len
);
1299 if (retval
== ERROR_OK
)
1301 hex_buffer
= malloc(len
* 2 + 1);
1304 for (i
= 0; i
< len
; i
++)
1306 uint8_t t
= buffer
[i
];
1307 hex_buffer
[2 * i
] = DIGITS
[(t
>> 4) & 0xf];
1308 hex_buffer
[2 * i
+ 1] = DIGITS
[t
& 0xf];
1311 gdb_put_packet(connection
, hex_buffer
, len
* 2);
1317 retval
= gdb_error(connection
, retval
);
1325 static int gdb_write_memory_packet(struct connection
*connection
,
1326 struct target
*target
, char *packet
, int packet_size
)
1337 /* skip command character */
1340 addr
= strtoul(packet
, &separator
, 16);
1342 if (*separator
!= ',')
1344 LOG_ERROR("incomplete write memory packet received, dropping connection");
1345 return ERROR_SERVER_REMOTE_CLOSED
;
1348 len
= strtoul(separator
+ 1, &separator
, 16);
1350 if (*(separator
++) != ':')
1352 LOG_ERROR("incomplete write memory packet received, dropping connection");
1353 return ERROR_SERVER_REMOTE_CLOSED
;
1356 buffer
= malloc(len
);
1358 LOG_DEBUG("addr: 0x%8.8" PRIx32
", len: 0x%8.8" PRIx32
"", addr
, len
);
1360 for (i
= 0; i
< len
; i
++)
1363 sscanf(separator
+ 2*i
, "%2" SCNx32
, &tmp
);
1367 retval
= target_write_buffer(target
, addr
, len
, buffer
);
1369 if (retval
== ERROR_OK
)
1371 gdb_put_packet(connection
, "OK", 2);
1375 retval
= gdb_error(connection
, retval
);
1383 static int gdb_write_memory_binary_packet(struct connection
*connection
,
1384 struct target
*target
, char *packet
, int packet_size
)
1390 int retval
= ERROR_OK
;
1392 /* skip command character */
1395 addr
= strtoul(packet
, &separator
, 16);
1397 if (*separator
!= ',')
1399 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1400 return ERROR_SERVER_REMOTE_CLOSED
;
1403 len
= strtoul(separator
+ 1, &separator
, 16);
1405 if (*(separator
++) != ':')
1407 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1408 return ERROR_SERVER_REMOTE_CLOSED
;
1411 struct gdb_connection
*gdb_connection
= connection
->priv
;
1413 if (gdb_connection
->mem_write_error
)
1415 retval
= ERROR_FAIL
;
1416 /* now that we have reported the memory write error, we can clear the condition */
1417 gdb_connection
->mem_write_error
= false;
1420 /* By replying the packet *immediately* GDB will send us a new packet
1421 * while we write the last one to the target.
1423 if (retval
== ERROR_OK
)
1425 gdb_put_packet(connection
, "OK", 2);
1429 if ((retval
= gdb_error(connection
, retval
)) != ERROR_OK
)
1435 LOG_DEBUG("addr: 0x%8.8" PRIx32
", len: 0x%8.8" PRIx32
"", addr
, len
);
1437 retval
= target_write_buffer(target
, addr
, len
, (uint8_t*)separator
);
1438 if (retval
!= ERROR_OK
)
1440 gdb_connection
->mem_write_error
= true;
1447 static int gdb_step_continue_packet(struct connection
*connection
,
1448 struct target
*target
, char *packet
, int packet_size
)
1451 uint32_t address
= 0x0;
1452 int retval
= ERROR_OK
;
1456 if (packet_size
> 1)
1458 packet
[packet_size
] = 0;
1459 address
= strtoul(packet
+ 1, NULL
, 16);
1466 if (packet
[0] == 'c')
1468 LOG_DEBUG("continue");
1469 target_handle_event(target
, TARGET_EVENT_OLD_pre_resume
);
1470 retval
= target_resume(target
, current
, address
, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
1472 else if (packet
[0] == 's')
1475 /* step at current or address, don't handle breakpoints */
1476 retval
= target_step(target
, current
, address
, 0);
1481 static int gdb_breakpoint_watchpoint_packet(struct connection
*connection
,
1482 struct target
*target
, char *packet
, int packet_size
)
1485 enum breakpoint_type bp_type
= BKPT_SOFT
/* dummy init to avoid warning */;
1486 enum watchpoint_rw wp_type
= WPT_READ
/* dummy init to avoid warning */;
1494 type
= strtoul(packet
+ 1, &separator
, 16);
1496 if (type
== 0) /* memory breakpoint */
1497 bp_type
= BKPT_SOFT
;
1498 else if (type
== 1) /* hardware breakpoint */
1499 bp_type
= BKPT_HARD
;
1500 else if (type
== 2) /* write watchpoint */
1501 wp_type
= WPT_WRITE
;
1502 else if (type
== 3) /* read watchpoint */
1504 else if (type
== 4) /* access watchpoint */
1505 wp_type
= WPT_ACCESS
;
1508 LOG_ERROR("invalid gdb watch/breakpoint type(%d), dropping connection", type
);
1509 return ERROR_SERVER_REMOTE_CLOSED
;
1513 if (gdb_breakpoint_override
&& ((bp_type
== BKPT_SOFT
)||(bp_type
== BKPT_HARD
)))
1515 bp_type
= gdb_breakpoint_override_type
;
1518 if (*separator
!= ',')
1520 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1521 return ERROR_SERVER_REMOTE_CLOSED
;
1524 address
= strtoul(separator
+ 1, &separator
, 16);
1526 if (*separator
!= ',')
1528 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1529 return ERROR_SERVER_REMOTE_CLOSED
;
1532 size
= strtoul(separator
+ 1, &separator
, 16);
1538 if (packet
[0] == 'Z')
1540 if ((retval
= breakpoint_add(target
, address
, size
, bp_type
)) != ERROR_OK
)
1542 if ((retval
= gdb_error(connection
, retval
)) != ERROR_OK
)
1547 gdb_put_packet(connection
, "OK", 2);
1552 breakpoint_remove(target
, address
);
1553 gdb_put_packet(connection
, "OK", 2);
1560 if (packet
[0] == 'Z')
1562 if ((retval
= watchpoint_add(target
, address
, size
, wp_type
, 0, 0xffffffffu
)) != ERROR_OK
)
1564 if ((retval
= gdb_error(connection
, retval
)) != ERROR_OK
)
1569 gdb_put_packet(connection
, "OK", 2);
1574 watchpoint_remove(target
, address
);
1575 gdb_put_packet(connection
, "OK", 2);
1586 /* print out a string and allocate more space as needed,
1587 * mainly used for XML at this point
1589 static void xml_printf(int *retval
, char **xml
, int *pos
, int *size
,
1590 const char *fmt
, ...)
1592 if (*retval
!= ERROR_OK
)
1600 if ((*xml
== NULL
) || (!first
))
1602 /* start by 0 to exercise all the code paths.
1603 * Need minimum 2 bytes to fit 1 char and 0 terminator. */
1605 *size
= *size
* 2 + 2;
1607 *xml
= realloc(*xml
, *size
);
1612 *retval
= ERROR_SERVER_REMOTE_CLOSED
;
1620 ret
= vsnprintf(*xml
+ *pos
, *size
- *pos
, fmt
, ap
);
1622 if ((ret
> 0) && ((ret
+ 1) < *size
- *pos
))
1627 /* there was just enough or not enough space, allocate more. */
1632 static int decode_xfer_read(char *buf
, char **annex
, int *ofs
, unsigned int *len
)
1636 /* Extract and NUL-terminate the annex. */
1638 while (*buf
&& *buf
!= ':')
1644 /* After the read marker and annex, qXfer looks like a
1645 * traditional 'm' packet. */
1647 *ofs
= strtoul(buf
, &separator
, 16);
1649 if (*separator
!= ',')
1652 *len
= strtoul(separator
+ 1, NULL
, 16);
1657 static int compare_bank (const void * a
, const void * b
)
1659 struct flash_bank
*b1
, *b2
;
1660 b1
=*((struct flash_bank
**)a
);
1661 b2
=*((struct flash_bank
**)b
);
1663 if (b1
->base
== b2
->base
)
1666 } else if (b1
->base
> b2
->base
)
1675 static int gdb_memory_map(struct connection
*connection
,
1676 struct target
*target
, char *packet
, int packet_size
)
1678 /* We get away with only specifying flash here. Regions that are not
1679 * specified are treated as if we provided no memory map(if not we
1680 * could detect the holes and mark them as RAM).
1681 * Normally we only execute this code once, but no big deal if we
1682 * have to regenerate it a couple of times.
1685 struct flash_bank
*p
;
1689 int retval
= ERROR_OK
;
1690 struct flash_bank
**banks
;
1694 uint32_t ram_start
= 0;
1697 /* skip command character */
1700 offset
= strtoul(packet
, &separator
, 16);
1701 length
= strtoul(separator
+ 1, &separator
, 16);
1703 xml_printf(&retval
, &xml
, &pos
, &size
, "<memory-map>\n");
1705 /* Sort banks in ascending order. We need to report non-flash
1706 * memory as ram (or rather read/write) by default for GDB, since
1707 * it has no concept of non-cacheable read/write memory (i/o etc).
1709 * FIXME Most non-flash addresses are *NOT* RAM! Don't lie.
1710 * Current versions of GDB assume unlisted addresses are RAM...
1712 banks
= malloc(sizeof(struct flash_bank
*)*flash_get_bank_count());
1714 for (i
= 0; i
< flash_get_bank_count(); i
++) {
1715 retval
= get_flash_bank_by_num(i
, &p
);
1716 if (retval
!= ERROR_OK
)
1719 gdb_send_error(connection
, retval
);
1725 qsort(banks
, flash_get_bank_count(), sizeof(struct flash_bank
*),
1728 for (i
= 0; i
< flash_get_bank_count(); i
++) {
1730 unsigned sector_size
= 0;
1731 uint32_t start
, end
;
1735 end
= p
->base
+ p
->size
;
1737 if (ram_start
< p
->base
)
1738 xml_printf(&retval
, &xml
, &pos
, &size
,
1739 "<memory type=\"ram\" start=\"0x%x\" "
1740 "length=\"0x%x\"/>\n",
1741 ram_start
, p
->base
- ram_start
);
1743 /* Report adjacent groups of same-size sectors. So for
1744 * example top boot CFI flash will list an initial region
1745 * with several large sectors (maybe 128KB) and several
1746 * smaller ones at the end (maybe 32KB). STR7 will have
1747 * regions with 8KB, 32KB, and 64KB sectors; etc.
1749 for (j
= 0; j
< p
->num_sectors
; j
++) {
1752 /* Maybe start a new group of sectors. */
1753 if (sector_size
== 0) {
1754 start
= p
->base
+ p
->sectors
[j
].offset
;
1755 xml_printf(&retval
, &xml
, &pos
, &size
,
1756 "<memory type=\"flash\" "
1759 sector_size
= p
->sectors
[j
].size
;
1762 /* Does this finish a group of sectors?
1763 * If not, continue an already-started group.
1765 if (j
== p
->num_sectors
-1)
1766 group_len
= (p
->base
+ p
->size
) - start
;
1767 else if (p
->sectors
[j
+ 1].size
!= sector_size
)
1768 group_len
= p
->base
+ p
->sectors
[j
+ 1].offset
1773 xml_printf(&retval
, &xml
, &pos
, &size
,
1774 "length=\"0x%x\">\n"
1775 "<property name=\"blocksize\">"
1783 ram_start
= p
->base
+ p
->size
;
1787 xml_printf(&retval
, &xml
, &pos
, &size
,
1788 "<memory type=\"ram\" start=\"0x%x\" "
1789 "length=\"0x%x\"/>\n",
1790 ram_start
, 0-ram_start
);
1791 /* ELSE a flash chip could be at the very end of the 32 bit address
1792 * space, in which case ram_start will be precisely 0
1798 xml_printf(&retval
, &xml
, &pos
, &size
, "</memory-map>\n");
1800 if (retval
!= ERROR_OK
) {
1801 gdb_send_error(connection
, retval
);
1805 if (offset
+ length
> pos
)
1806 length
= pos
- offset
;
1808 char *t
= malloc(length
+ 1);
1810 memcpy(t
+ 1, xml
+ offset
, length
);
1811 gdb_put_packet(connection
, t
, length
+ 1);
1818 static int gdb_query_packet(struct connection
*connection
,
1819 struct target
*target
, char *packet
, int packet_size
)
1821 struct command_context
*cmd_ctx
= connection
->cmd_ctx
;
1822 struct gdb_connection
*gdb_connection
= connection
->priv
;
1824 if (strstr(packet
, "qRcmd,"))
1826 if (packet_size
> 6)
1830 cmd
= malloc((packet_size
- 6)/2 + 1);
1831 for (i
= 0; i
< (packet_size
- 6)/2; i
++)
1834 sscanf(packet
+ 6 + 2*i
, "%2" SCNx32
, &tmp
);
1837 cmd
[(packet_size
- 6)/2] = 0x0;
1839 /* We want to print all debug output to GDB connection */
1840 log_add_callback(gdb_log_callback
, connection
);
1841 target_call_timer_callbacks_now();
1842 /* some commands need to know the GDB connection, make note of current
1843 * GDB connection. */
1844 current_gdb_connection
= gdb_connection
;
1845 command_run_line(cmd_ctx
, cmd
);
1846 current_gdb_connection
= NULL
;
1847 target_call_timer_callbacks_now();
1848 log_remove_callback(gdb_log_callback
, connection
);
1851 gdb_put_packet(connection
, "OK", 2);
1854 else if (strstr(packet
, "qCRC:"))
1856 if (packet_size
> 5)
1865 /* skip command character */
1868 addr
= strtoul(packet
, &separator
, 16);
1870 if (*separator
!= ',')
1872 LOG_ERROR("incomplete read memory packet received, dropping connection");
1873 return ERROR_SERVER_REMOTE_CLOSED
;
1876 len
= strtoul(separator
+ 1, NULL
, 16);
1878 retval
= target_checksum_memory(target
, addr
, len
, &checksum
);
1880 if (retval
== ERROR_OK
)
1882 snprintf(gdb_reply
, 10, "C%8.8" PRIx32
"", checksum
);
1883 gdb_put_packet(connection
, gdb_reply
, 9);
1887 if ((retval
= gdb_error(connection
, retval
)) != ERROR_OK
)
1894 else if (strstr(packet
, "qSupported"))
1896 /* we currently support packet size and qXfer:memory-map:read (if enabled)
1897 * disable qXfer:features:read for the moment */
1898 int retval
= ERROR_OK
;
1899 char *buffer
= NULL
;
1903 xml_printf(&retval
, &buffer
, &pos
, &size
,
1904 "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-;QStartNoAckMode+",
1905 (GDB_BUFFER_SIZE
- 1), ((gdb_use_memory_map
== 1) && (flash_get_bank_count() > 0)) ? '+' : '-');
1907 if (retval
!= ERROR_OK
)
1909 gdb_send_error(connection
, 01);
1913 gdb_put_packet(connection
, buffer
, strlen(buffer
));
1918 else if (strstr(packet
, "qXfer:memory-map:read::")
1919 && (flash_get_bank_count() > 0))
1920 return gdb_memory_map(connection
, target
, packet
, packet_size
);
1921 else if (strstr(packet
, "qXfer:features:read:"))
1926 int retval
= ERROR_OK
;
1929 unsigned int length
;
1932 /* skip command character */
1935 if (decode_xfer_read(packet
, &annex
, &offset
, &length
) < 0)
1937 gdb_send_error(connection
, 01);
1941 if (strcmp(annex
, "target.xml") != 0)
1943 gdb_send_error(connection
, 01);
1947 xml_printf(&retval
, &xml
, &pos
, &size
, \
1948 "l < target version=\"1.0\">\n < architecture > arm</architecture>\n</target>\n");
1950 if (retval
!= ERROR_OK
)
1952 gdb_send_error(connection
, retval
);
1956 gdb_put_packet(connection
, xml
, strlen(xml
));
1961 else if (strstr(packet
, "QStartNoAckMode"))
1963 gdb_connection
->noack_mode
= 1;
1964 gdb_put_packet(connection
, "OK", 2);
1968 gdb_put_packet(connection
, "", 0);
1972 static int gdb_v_packet(struct connection
*connection
,
1973 struct target
*target
, char *packet
, int packet_size
)
1975 struct gdb_connection
*gdb_connection
= connection
->priv
;
1976 struct gdb_service
*gdb_service
= connection
->service
->priv
;
1979 /* if flash programming disabled - send a empty reply */
1981 if (gdb_flash_program
== 0)
1983 gdb_put_packet(connection
, "", 0);
1987 if (strstr(packet
, "vFlashErase:"))
1990 unsigned long length
;
1992 char *parse
= packet
+ 12;
1995 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1996 return ERROR_SERVER_REMOTE_CLOSED
;
1999 addr
= strtoul(parse
, &parse
, 16);
2001 if (*(parse
++) != ',' || *parse
== '\0')
2003 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2004 return ERROR_SERVER_REMOTE_CLOSED
;
2007 length
= strtoul(parse
, &parse
, 16);
2011 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2012 return ERROR_SERVER_REMOTE_CLOSED
;
2015 /* assume all sectors need erasing - stops any problems
2016 * when flash_write is called multiple times */
2019 /* perform any target specific operations before the erase */
2020 target_call_event_callbacks(gdb_service
->target
,
2021 TARGET_EVENT_GDB_FLASH_ERASE_START
);
2023 /* vFlashErase:addr,length messages require region start and
2024 * end to be "block" aligned ... if padding is ever needed,
2025 * GDB will have become dangerously confused.
2027 result
= flash_erase_address_range(gdb_service
->target
,
2028 false, addr
, length
);
2030 /* perform any target specific operations after the erase */
2031 target_call_event_callbacks(gdb_service
->target
,
2032 TARGET_EVENT_GDB_FLASH_ERASE_END
);
2035 if (result
!= ERROR_OK
)
2037 /* GDB doesn't evaluate the actual error number returned,
2038 * treat a failed erase as an I/O error
2040 gdb_send_error(connection
, EIO
);
2041 LOG_ERROR("flash_erase returned %i", result
);
2044 gdb_put_packet(connection
, "OK", 2);
2049 if (strstr(packet
, "vFlashWrite:"))
2053 unsigned long length
;
2054 char *parse
= packet
+ 12;
2058 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2059 return ERROR_SERVER_REMOTE_CLOSED
;
2061 addr
= strtoul(parse
, &parse
, 16);
2062 if (*(parse
++) != ':')
2064 LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
2065 return ERROR_SERVER_REMOTE_CLOSED
;
2067 length
= packet_size
- (parse
- packet
);
2069 /* create a new image if there isn't already one */
2070 if (gdb_connection
->vflash_image
== NULL
)
2072 gdb_connection
->vflash_image
= malloc(sizeof(struct image
));
2073 image_open(gdb_connection
->vflash_image
, "", "build");
2076 /* create new section with content from packet buffer */
2077 if ((retval
= image_add_section(gdb_connection
->vflash_image
, addr
, length
, 0x0, (uint8_t*)parse
)) != ERROR_OK
)
2082 gdb_put_packet(connection
, "OK", 2);
2087 if (!strcmp(packet
, "vFlashDone"))
2091 /* process the flashing buffer. No need to erase as GDB
2092 * always issues a vFlashErase first. */
2093 target_call_event_callbacks(gdb_service
->target
, TARGET_EVENT_GDB_FLASH_WRITE_START
);
2094 result
= flash_write(gdb_service
->target
, gdb_connection
->vflash_image
, &written
, 0);
2095 target_call_event_callbacks(gdb_service
->target
, TARGET_EVENT_GDB_FLASH_WRITE_END
);
2096 if (result
!= ERROR_OK
)
2098 if (result
== ERROR_FLASH_DST_OUT_OF_BANK
)
2099 gdb_put_packet(connection
, "E.memtype", 9);
2101 gdb_send_error(connection
, EIO
);
2105 LOG_DEBUG("wrote %u bytes from vFlash image to flash", (unsigned)written
);
2106 gdb_put_packet(connection
, "OK", 2);
2109 image_close(gdb_connection
->vflash_image
);
2110 free(gdb_connection
->vflash_image
);
2111 gdb_connection
->vflash_image
= NULL
;
2116 gdb_put_packet(connection
, "", 0);
2120 static int gdb_detach(struct connection
*connection
, struct target
*target
)
2122 struct gdb_service
*gdb_service
= connection
->service
->priv
;
2124 target_call_event_callbacks(gdb_service
->target
,
2125 TARGET_EVENT_GDB_DETACH
);
2127 return gdb_put_packet(connection
, "OK", 2);
2130 static void gdb_log_callback(void *priv
, const char *file
, unsigned line
,
2131 const char *function
, const char *string
)
2133 struct connection
*connection
= priv
;
2134 struct gdb_connection
*gdb_con
= connection
->priv
;
2138 /* do not reply this using the O packet */
2142 gdb_output_con(connection
, string
);
2145 static void gdb_sig_halted(struct connection
*connection
)
2148 snprintf(sig_reply
, 4, "T%2.2x", 2);
2149 gdb_put_packet(connection
, sig_reply
, 3);
2153 static int gdb_input_inner(struct connection
*connection
)
2155 /* Do not allocate this on the stack */
2156 static char gdb_packet_buffer
[GDB_BUFFER_SIZE
];
2158 struct gdb_service
*gdb_service
= connection
->service
->priv
;
2159 struct target
*target
= gdb_service
->target
;
2160 char *packet
= gdb_packet_buffer
;
2163 struct gdb_connection
*gdb_con
= connection
->priv
;
2164 static int extended_protocol
= 0;
2166 /* drain input buffer */
2169 packet_size
= GDB_BUFFER_SIZE
-1;
2170 retval
= gdb_get_packet(connection
, packet
, &packet_size
);
2171 if (retval
!= ERROR_OK
)
2174 /* terminate with zero */
2175 packet
[packet_size
] = 0;
2177 if (LOG_LEVEL_IS(LOG_LVL_DEBUG
)) {
2178 if (packet
[0] == 'X') {
2179 // binary packets spew junk into the debug log stream
2182 for (x
= 0 ; (x
< 49) && (packet
[x
] != ':') ; x
++) {
2186 LOG_DEBUG("received packet: '%s:<binary-data>'", buf
);
2188 LOG_DEBUG("received packet: '%s'", packet
);
2192 if (packet_size
> 0)
2198 /* Hct... -- set thread
2199 * we don't have threads, send empty reply */
2200 gdb_put_packet(connection
, NULL
, 0);
2204 retval
= gdb_query_packet(connection
,
2209 retval
= gdb_get_registers_packet(
2211 packet
, packet_size
);
2214 retval
= gdb_set_registers_packet(
2216 packet
, packet_size
);
2219 retval
= gdb_get_register_packet(
2221 packet
, packet_size
);
2224 retval
= gdb_set_register_packet(
2226 packet
, packet_size
);
2229 retval
= gdb_read_memory_packet(
2231 packet
, packet_size
);
2234 retval
= gdb_write_memory_packet(
2236 packet
, packet_size
);
2240 retval
= gdb_breakpoint_watchpoint_packet(connection
, target
, packet
, packet_size
);
2243 gdb_last_signal_packet(
2245 packet
, packet_size
);
2250 int retval
= ERROR_OK
;
2252 struct gdb_connection
*gdb_con
= connection
->priv
;
2253 log_add_callback(gdb_log_callback
, connection
);
2255 if (gdb_con
->mem_write_error
)
2257 LOG_ERROR("Memory write failure!");
2259 /* now that we have reported the memory write error, we can clear the condition */
2260 gdb_con
->mem_write_error
= false;
2263 bool nostep
= false;
2264 bool already_running
= false;
2265 if (target
->state
== TARGET_RUNNING
)
2267 LOG_WARNING("WARNING! The target is already running. "
2268 "All changes GDB did to registers will be discarded! "
2269 "Waiting for target to halt.");
2270 already_running
= true;
2271 } else if (target
->state
!= TARGET_HALTED
)
2273 LOG_WARNING("The target is not in the halted nor running stated, stepi/continue ignored.");
2275 } else if ((packet
[0] == 's') && gdb_con
->sync
)
2277 /* Hmm..... when you issue a continue in GDB, then a "stepi" is
2278 * sent by GDB first to OpenOCD, thus defeating the check to
2279 * make only the single stepping have the sync feature...
2282 LOG_WARNING("stepi ignored. GDB will now fetch the register state from the target.");
2284 gdb_con
->sync
= false;
2286 if ((retval
!=ERROR_OK
) || (!already_running
&& nostep
))
2288 /* Either the target isn't in the halted state, then we can't
2289 * step/continue. This might be early setup, etc.
2291 * Or we want to allow GDB to pick up a fresh set of
2292 * register values without modifying the target state.
2295 gdb_sig_halted(connection
);
2297 /* stop forwarding log packets! */
2298 log_remove_callback(gdb_log_callback
, connection
);
2301 /* We're running/stepping, in which case we can
2302 * forward log output until the target is halted
2304 gdb_con
->frontend_state
= TARGET_RUNNING
;
2305 target_call_event_callbacks(target
, TARGET_EVENT_GDB_START
);
2307 if (!already_running
)
2309 int retval
= gdb_step_continue_packet(connection
, target
, packet
, packet_size
);
2310 if (retval
!= ERROR_OK
)
2312 /* we'll never receive a halted condition... issue a false one.. */
2313 gdb_frontend_halted(target
, connection
);
2320 retval
= gdb_v_packet(
2322 packet
, packet_size
);
2325 retval
= gdb_detach(connection
, target
);
2326 extended_protocol
= 0;
2329 retval
= gdb_write_memory_binary_packet(
2331 packet
, packet_size
);
2332 if (retval
!= ERROR_OK
)
2336 if (extended_protocol
!= 0)
2338 gdb_put_packet(connection
, "OK", 2);
2339 return ERROR_SERVER_REMOTE_CLOSED
;
2341 /* handle extended remote protocol */
2342 extended_protocol
= 1;
2343 gdb_put_packet(connection
, "OK", 2);
2346 /* handle extended restart packet */
2347 breakpoint_clear_target(gdb_service
->target
);
2348 watchpoint_clear_target(gdb_service
->target
);
2349 command_run_linef(connection
->cmd_ctx
,
2350 "ocd_gdb_restart %s",
2351 target_name(target
));
2354 /* ignore unknown packets */
2355 LOG_DEBUG("ignoring 0x%2.2x packet", packet
[0]);
2356 gdb_put_packet(connection
, NULL
, 0);
2360 /* if a packet handler returned an error, exit input loop */
2361 if (retval
!= ERROR_OK
)
2365 if (gdb_con
->ctrl_c
)
2367 if (target
->state
== TARGET_RUNNING
)
2369 retval
= target_halt(target
);
2370 if (retval
!= ERROR_OK
)
2372 target_call_event_callbacks(target
, TARGET_EVENT_GDB_HALT
);
2374 gdb_con
->ctrl_c
= 0;
2377 LOG_INFO("The target is not running when halt was requested, stopping GDB.");
2378 target_call_event_callbacks(target
, TARGET_EVENT_GDB_HALT
);
2382 } while (gdb_con
->buf_cnt
> 0);
2387 static int gdb_input(struct connection
*connection
)
2389 int retval
= gdb_input_inner(connection
);
2390 struct gdb_connection
*gdb_con
= connection
->priv
;
2391 if (retval
== ERROR_SERVER_REMOTE_CLOSED
)
2394 /* logging does not propagate the error, yet can set the gdb_con->closed flag */
2395 if (gdb_con
->closed
)
2396 return ERROR_SERVER_REMOTE_CLOSED
;
2398 /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
2402 static int gdb_target_start(struct target
*target
, uint16_t port
)
2404 bool use_pipes
= 0 == port
;
2405 struct gdb_service
*gdb_service
= malloc(sizeof(struct gdb_service
));
2406 if (NULL
== gdb_service
)
2409 gdb_service
->target
= target
;
2411 add_service("gdb", use_pipes
? CONNECTION_PIPE
: CONNECTION_TCP
,
2412 port
, 1, &gdb_new_connection
, &gdb_input
,
2413 &gdb_connection_closed
, gdb_service
);
2415 const char *name
= target_name(target
);
2417 LOG_DEBUG("gdb service for target '%s' using pipes", name
);
2419 LOG_DEBUG("gdb service for target '%s' on TCP port %u", name
, port
);
2423 static int gdb_target_add_one(struct target
*target
)
2425 if (gdb_port
== 0 && server_use_pipes
== 0)
2427 LOG_INFO("gdb port disabled");
2430 if (0 == gdb_port_next
)
2431 gdb_port_next
= gdb_port
;
2433 bool use_pipes
= server_use_pipes
;
2434 static bool server_started_with_pipes
= false;
2435 if (server_started_with_pipes
)
2437 LOG_WARNING("gdb service permits one target when using pipes");
2444 int e
= gdb_target_start(target
, use_pipes
? 0 : gdb_port_next
);
2447 server_started_with_pipes
|= use_pipes
;
2453 int gdb_target_add_all(struct target
*target
)
2457 LOG_WARNING("gdb services need one or more targets defined");
2461 while (NULL
!= target
)
2463 int retval
= gdb_target_add_one(target
);
2464 if (ERROR_OK
!= retval
)
2467 target
= target
->next
;
2473 COMMAND_HANDLER(handle_gdb_sync_command
)
2477 return ERROR_COMMAND_SYNTAX_ERROR
;
2480 if (current_gdb_connection
== NULL
)
2482 command_print(CMD_CTX
,
2483 "gdb_sync command can only be run from within gdb using \"monitor gdb_sync\"");
2487 current_gdb_connection
->sync
= true;
2492 /* daemon configuration command gdb_port */
2493 COMMAND_HANDLER(handle_gdb_port_command
)
2495 int retval
= CALL_COMMAND_HANDLER(server_port_command
, &gdb_port
);
2496 if (ERROR_OK
== retval
)
2497 gdb_port_next
= gdb_port
;
2501 COMMAND_HANDLER(handle_gdb_memory_map_command
)
2504 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], gdb_use_memory_map
);
2506 return ERROR_COMMAND_SYNTAX_ERROR
;
2509 COMMAND_HANDLER(handle_gdb_flash_program_command
)
2512 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], gdb_flash_program
);
2514 return ERROR_COMMAND_SYNTAX_ERROR
;
2517 COMMAND_HANDLER(handle_gdb_report_data_abort_command
)
2520 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], gdb_report_data_abort
);
2522 return ERROR_COMMAND_SYNTAX_ERROR
;
2525 /* gdb_breakpoint_override */
2526 COMMAND_HANDLER(handle_gdb_breakpoint_override_command
)
2531 } else if (CMD_ARGC
== 1)
2533 gdb_breakpoint_override
= 1;
2534 if (strcmp(CMD_ARGV
[0], "hard") == 0)
2536 gdb_breakpoint_override_type
= BKPT_HARD
;
2537 } else if (strcmp(CMD_ARGV
[0], "soft") == 0)
2539 gdb_breakpoint_override_type
= BKPT_SOFT
;
2540 } else if (strcmp(CMD_ARGV
[0], "disable") == 0)
2542 gdb_breakpoint_override
= 0;
2546 return ERROR_COMMAND_SYNTAX_ERROR
;
2548 if (gdb_breakpoint_override
)
2550 LOG_USER("force %s breakpoints", (gdb_breakpoint_override_type
== BKPT_HARD
)?"hard":"soft");
2553 LOG_USER("breakpoint type is not overridden");
2559 static const struct command_registration gdb_command_handlers
[] = {
2562 .handler
= handle_gdb_sync_command
,
2563 .mode
= COMMAND_ANY
,
2564 .help
= "next stepi will return immediately allowing "
2565 "GDB to fetch register state without affecting "
2570 .handler
= handle_gdb_port_command
,
2571 .mode
= COMMAND_ANY
,
2572 .help
= "Display or specify base port on which to listen "
2573 "for incoming GDB connections. "
2574 "No arguments reports GDB port; zero disables.",
2575 .usage
= "[port_num]",
2578 .name
= "gdb_memory_map",
2579 .handler
= handle_gdb_memory_map_command
,
2580 .mode
= COMMAND_CONFIG
,
2581 .help
= "enable or disable memory map",
2582 .usage
= "('enable'|'disable')"
2585 .name
= "gdb_flash_program",
2586 .handler
= handle_gdb_flash_program_command
,
2587 .mode
= COMMAND_CONFIG
,
2588 .help
= "enable or disable flash program",
2589 .usage
= "('enable'|'disable')"
2592 .name
= "gdb_report_data_abort",
2593 .handler
= handle_gdb_report_data_abort_command
,
2594 .mode
= COMMAND_CONFIG
,
2595 .help
= "enable or disable reporting data aborts",
2596 .usage
= "('enable'|'disable')"
2599 .name
= "gdb_breakpoint_override",
2600 .handler
= handle_gdb_breakpoint_override_command
,
2601 .mode
= COMMAND_ANY
,
2602 .help
= "Display or specify type of breakpoint "
2603 "to be used by gdb 'break' commands.",
2604 .usage
= "('hard'|'soft'|'disable')"
2606 COMMAND_REGISTRATION_DONE
2609 int gdb_register_commands(struct command_context
*cmd_ctx
)
2611 return register_commands(cmd_ctx
, NULL
, gdb_command_handlers
);