1 /* Remote target communications for serial-line targets in custom GDB protocol
2 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
25 #include "gdb_string.h"
32 /*#include "terminal.h" */
35 #include "gdb-stabs.h"
36 #include "gdbthread.h"
43 #include <sys/types.h>
46 #include "event-loop.h"
47 #include "event-top.h"
53 #include "gdbcore.h" /* for exec_bfd */
55 /* Prototypes for local functions */
56 static void cleanup_sigint_signal_handler (void *dummy
);
57 static void initialize_sigint_signal_handler (void);
58 static int getpkt_sane (char *buf
, long sizeof_buf
, int forever
);
60 static void handle_remote_sigint (int);
61 static void handle_remote_sigint_twice (int);
62 static void async_remote_interrupt (gdb_client_data
);
63 void async_remote_interrupt_twice (gdb_client_data
);
65 static void build_remote_gdbarch_data (void);
67 static int remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
);
69 static int remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
);
71 static void remote_files_info (struct target_ops
*ignore
);
73 static int remote_xfer_memory (CORE_ADDR memaddr
, char *myaddr
,
74 int len
, int should_write
,
75 struct mem_attrib
*attrib
,
76 struct target_ops
*target
);
78 static void remote_prepare_to_store (void);
80 static void remote_fetch_registers (int regno
);
82 static void remote_resume (ptid_t ptid
, int step
,
83 enum target_signal siggnal
);
84 static void remote_async_resume (ptid_t ptid
, int step
,
85 enum target_signal siggnal
);
86 static int remote_start_remote (PTR
);
88 static void remote_open (char *name
, int from_tty
);
89 static void remote_async_open (char *name
, int from_tty
);
91 static void extended_remote_open (char *name
, int from_tty
);
92 static void extended_remote_async_open (char *name
, int from_tty
);
94 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
);
95 static void remote_async_open_1 (char *, int, struct target_ops
*,
98 static void remote_close (int quitting
);
100 static void remote_store_registers (int regno
);
102 static void remote_mourn (void);
103 static void remote_async_mourn (void);
105 static void extended_remote_restart (void);
107 static void extended_remote_mourn (void);
109 static void extended_remote_create_inferior (char *, char *, char **);
110 static void extended_remote_async_create_inferior (char *, char *, char **);
112 static void remote_mourn_1 (struct target_ops
*);
114 static void remote_send (char *buf
, long sizeof_buf
);
116 static int readchar (int timeout
);
118 static ptid_t
remote_wait (ptid_t ptid
,
119 struct target_waitstatus
*status
);
120 static ptid_t
remote_async_wait (ptid_t ptid
,
121 struct target_waitstatus
*status
);
123 static void remote_kill (void);
124 static void remote_async_kill (void);
126 static int tohex (int nib
);
128 static void remote_detach (char *args
, int from_tty
);
129 static void remote_async_detach (char *args
, int from_tty
);
131 static void remote_interrupt (int signo
);
133 static void remote_interrupt_twice (int signo
);
135 static void interrupt_query (void);
137 static void set_thread (int, int);
139 static int remote_thread_alive (ptid_t
);
141 static void get_offsets (void);
143 static long read_frame (char *buf
, long sizeof_buf
);
145 static int remote_insert_breakpoint (CORE_ADDR
, char *);
147 static int remote_remove_breakpoint (CORE_ADDR
, char *);
149 static int hexnumlen (ULONGEST num
);
151 static void init_remote_ops (void);
153 static void init_extended_remote_ops (void);
155 static void init_remote_cisco_ops (void);
157 static struct target_ops remote_cisco_ops
;
159 static void remote_stop (void);
161 static int ishex (int ch
, int *val
);
163 static int stubhex (int ch
);
165 static int remote_query (int /*char */ , char *, char *, int *);
167 static int hexnumstr (char *, ULONGEST
);
169 static int hexnumnstr (char *, ULONGEST
, int);
171 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
173 static void print_packet (char *);
175 static unsigned long crc32 (unsigned char *, int, unsigned int);
177 static void compare_sections_command (char *, int);
179 static void packet_command (char *, int);
181 static int stub_unpack_int (char *buff
, int fieldlength
);
183 static ptid_t
remote_current_thread (ptid_t oldptid
);
185 static void remote_find_new_threads (void);
187 static void record_currthread (int currthread
);
189 /* exported functions */
191 extern int fromhex (int a
);
193 static int putpkt_binary (char *buf
, int cnt
);
195 static void check_binary_download (CORE_ADDR addr
);
197 struct packet_config
;
199 static void show_packet_config_cmd (struct packet_config
*config
);
201 static void update_packet_config (struct packet_config
*config
);
203 /* Define the target subroutine names */
205 void open_remote_target (char *, int, struct target_ops
*, int);
207 void _initialize_remote (void);
211 static struct target_ops remote_ops
;
213 static struct target_ops extended_remote_ops
;
215 /* Temporary target ops. Just like the remote_ops and
216 extended_remote_ops, but with asynchronous support. */
217 static struct target_ops remote_async_ops
;
219 static struct target_ops extended_async_remote_ops
;
221 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
222 ``forever'' still use the normal timeout mechanism. This is
223 currently used by the ASYNC code to guarentee that target reads
224 during the initial connect always time-out. Once getpkt has been
225 modified to return a timeout indication and, in turn
226 remote_wait()/wait_for_inferior() have gained a timeout parameter
228 static int wait_forever_enabled_p
= 1;
231 /* This variable chooses whether to send a ^C or a break when the user
232 requests program interruption. Although ^C is usually what remote
233 systems expect, and that is the default here, sometimes a break is
234 preferable instead. */
236 static int remote_break
;
238 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
239 remote_open knows that we don't have a file open when the program
241 static serial_t remote_desc
= NULL
;
243 /* This is set by the target (thru the 'S' message)
244 to denote that the target is in kernel mode. */
245 static int cisco_kernel_mode
= 0;
247 /* This variable sets the number of bits in an address that are to be
248 sent in a memory ("M" or "m") packet. Normally, after stripping
249 leading zeros, the entire address would be sent. This variable
250 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
251 initial implementation of remote.c restricted the address sent in
252 memory packets to ``host::sizeof long'' bytes - (typically 32
253 bits). Consequently, for 64 bit targets, the upper 32 bits of an
254 address was never sent. Since fixing this bug may cause a break in
255 some remote targets this variable is principly provided to
256 facilitate backward compatibility. */
258 static int remote_address_size
;
260 /* Tempoary to track who currently owns the terminal. See
261 target_async_terminal_* for more details. */
263 static int remote_async_terminal_ours_p
;
266 /* This is the size (in chars) of the first response to the ``g''
267 packet. It is used as a heuristic when determining the maximum
268 size of memory-read and memory-write packets. A target will
269 typically only reserve a buffer large enough to hold the ``g''
270 packet. The size does not include packet overhead (headers and
273 static long actual_register_packet_size
;
275 /* This is the maximum size (in chars) of a non read/write packet. It
276 is also used as a cap on the size of read/write packets. */
278 static long remote_packet_size
;
280 #define PBUFSIZ (remote_packet_size)
282 /* User configurable variables for the number of characters in a
283 memory read/write packet. MIN (PBUFSIZ, g-packet-size) is the
284 default. Some targets need smaller values (fifo overruns, et.al.)
285 and some users need larger values (speed up transfers). The
286 variables ``preferred_*'' (the user request), ``current_*'' (what
287 was actually set) and ``forced_*'' (Positive - a soft limit,
288 negative - a hard limit). */
290 struct memory_packet_config
297 /* Compute the current size of a read/write packet. Since this makes
298 use of ``actual_register_packet_size'' the computation is dynamic. */
301 get_memory_packet_size (struct memory_packet_config
*config
)
303 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
304 law?) that some hosts don't cope very well with large alloca()
305 calls. Eventually the alloca() code will be replaced by calls to
306 xmalloc() and make_cleanups() allowing this restriction to either
307 be lifted or removed. */
308 #ifndef MAX_REMOTE_PACKET_SIZE
309 #define MAX_REMOTE_PACKET_SIZE 16384
311 /* NOTE: 16 is just chosen at random. */
312 #ifndef MIN_REMOTE_PACKET_SIZE
313 #define MIN_REMOTE_PACKET_SIZE 16
318 if (config
->size
<= 0)
319 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
321 what_they_get
= config
->size
;
325 what_they_get
= remote_packet_size
;
326 /* Limit the packet to the size specified by the user. */
328 && what_they_get
> config
->size
)
329 what_they_get
= config
->size
;
330 /* Limit it to the size of the targets ``g'' response. */
331 if (actual_register_packet_size
> 0
332 && what_they_get
> actual_register_packet_size
)
333 what_they_get
= actual_register_packet_size
;
335 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
336 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
337 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
338 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
339 return what_they_get
;
342 /* Update the size of a read/write packet. If they user wants
343 something really big then do a sanity check. */
346 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
348 int fixed_p
= config
->fixed_p
;
349 long size
= config
->size
;
351 error ("Argument required (integer, `fixed' or `limited').");
352 else if (strcmp (args
, "hard") == 0
353 || strcmp (args
, "fixed") == 0)
355 else if (strcmp (args
, "soft") == 0
356 || strcmp (args
, "limit") == 0)
361 size
= strtoul (args
, &end
, 0);
363 error ("Invalid %s (bad syntax).", config
->name
);
365 /* Instead of explicitly capping the size of a packet to
366 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
367 instead allowed to set the size to something arbitrarily
369 if (size
> MAX_REMOTE_PACKET_SIZE
)
370 error ("Invalid %s (too large).", config
->name
);
374 if (fixed_p
&& !config
->fixed_p
)
376 if (! query ("The target may not be able to correctly handle a %s\n"
377 "of %ld bytes. Change the packet size? ",
379 error ("Packet size not changed.");
381 /* Update the config. */
382 config
->fixed_p
= fixed_p
;
387 show_memory_packet_size (struct memory_packet_config
*config
)
389 printf_filtered ("The %s is %ld. ", config
->name
, config
->size
);
391 printf_filtered ("Packets are fixed at %ld bytes.\n",
392 get_memory_packet_size (config
));
394 printf_filtered ("Packets are limited to %ld bytes.\n",
395 get_memory_packet_size (config
));
398 static struct memory_packet_config memory_write_packet_config
=
400 "memory-write-packet-size",
404 set_memory_write_packet_size (char *args
, int from_tty
)
406 set_memory_packet_size (args
, &memory_write_packet_config
);
410 show_memory_write_packet_size (char *args
, int from_tty
)
412 show_memory_packet_size (&memory_write_packet_config
);
416 get_memory_write_packet_size (void)
418 return get_memory_packet_size (&memory_write_packet_config
);
421 static struct memory_packet_config memory_read_packet_config
=
423 "memory-read-packet-size",
427 set_memory_read_packet_size (char *args
, int from_tty
)
429 set_memory_packet_size (args
, &memory_read_packet_config
);
433 show_memory_read_packet_size (char *args
, int from_tty
)
435 show_memory_packet_size (&memory_read_packet_config
);
439 get_memory_read_packet_size (void)
441 long size
= get_memory_packet_size (&memory_read_packet_config
);
442 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
443 extra buffer size argument before the memory read size can be
444 increased beyond PBUFSIZ. */
450 /* Register packet size initialization. Since the bounds change when
451 the architecture changes (namely REGISTER_BYTES) this all needs to
455 register_remote_packet_sizes (void)
457 REGISTER_GDBARCH_SWAP (remote_packet_size
);
458 REGISTER_GDBARCH_SWAP (actual_register_packet_size
);
462 build_remote_packet_sizes (void)
464 /* Default maximum number of characters in a packet body. Many
465 remote stubs have a hardwired buffer size of 400 bytes
466 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
467 as the maximum packet-size to ensure that the packet and an extra
468 NUL character can always fit in the buffer. This stops GDB
469 trashing stubs that try to squeeze an extra NUL into what is
470 already a full buffer (As of 1999-12-04 that was most stubs. */
471 remote_packet_size
= 400 - 1;
472 /* Should REGISTER_BYTES needs more space than the default, adjust
473 the size accordingly. Remember that each byte is encoded as two
474 characters. 32 is the overhead for the packet header /
475 footer. NOTE: cagney/1999-10-26: I suspect that 8
476 (``$NN:G...#NN'') is a better guess, the below has been padded a
478 if (REGISTER_BYTES
> ((remote_packet_size
- 32) / 2))
479 remote_packet_size
= (REGISTER_BYTES
* 2 + 32);
481 /* This one is filled in when a ``g'' packet is received. */
482 actual_register_packet_size
= 0;
485 /* Generic configuration support for packets the stub optionally
486 supports. Allows the user to specify the use of the packet as well
487 as allowing GDB to auto-detect support in the remote stub. */
491 PACKET_SUPPORT_UNKNOWN
= 0,
500 enum cmd_auto_boolean detect
;
501 enum packet_support support
;
504 /* Analyze a packet's return value and update the packet config
515 update_packet_config (struct packet_config
*config
)
517 switch (config
->detect
)
519 case CMD_AUTO_BOOLEAN_TRUE
:
520 config
->support
= PACKET_ENABLE
;
522 case CMD_AUTO_BOOLEAN_FALSE
:
523 config
->support
= PACKET_DISABLE
;
525 case CMD_AUTO_BOOLEAN_AUTO
:
526 config
->support
= PACKET_SUPPORT_UNKNOWN
;
532 show_packet_config_cmd (struct packet_config
*config
)
534 char *support
= "internal-error";
535 switch (config
->support
)
541 support
= "disabled";
543 case PACKET_SUPPORT_UNKNOWN
:
547 switch (config
->detect
)
549 case CMD_AUTO_BOOLEAN_AUTO
:
550 printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
551 config
->name
, config
->title
, support
);
553 case CMD_AUTO_BOOLEAN_TRUE
:
554 case CMD_AUTO_BOOLEAN_FALSE
:
555 printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
556 config
->name
, config
->title
, support
);
562 add_packet_config_cmd (struct packet_config
*config
,
565 void (*set_func
) (char *args
, int from_tty
,
566 struct cmd_list_element
*
568 void (*show_func
) (char *name
,
570 struct cmd_list_element
**set_remote_list
,
571 struct cmd_list_element
**show_remote_list
,
574 struct cmd_list_element
*set_cmd
;
575 struct cmd_list_element
*show_cmd
;
580 config
->title
= title
;
581 config
->detect
= CMD_AUTO_BOOLEAN_AUTO
;
582 config
->support
= PACKET_SUPPORT_UNKNOWN
;
583 xasprintf (&set_doc
, "Set use of remote protocol `%s' (%s) packet",
585 xasprintf (&show_doc
, "Show current use of remote protocol `%s' (%s) packet",
587 /* set/show TITLE-packet {auto,on,off} */
588 xasprintf (&cmd_name
, "%s-packet", title
);
589 set_cmd
= add_set_auto_boolean_cmd (cmd_name
, class_obscure
,
590 &config
->detect
, set_doc
,
592 set_cmd
->function
.sfunc
= set_func
;
593 show_cmd
= add_cmd (cmd_name
, class_obscure
, show_func
, show_doc
,
595 /* set/show remote NAME-packet {auto,on,off} -- legacy */
599 xasprintf (&legacy_name
, "%s-packet", name
);
600 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
602 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
607 static enum packet_result
608 packet_ok (const char *buf
, struct packet_config
*config
)
612 /* The stub recognized the packet request. Check that the
613 operation succeeded. */
614 switch (config
->support
)
616 case PACKET_SUPPORT_UNKNOWN
:
618 fprintf_unfiltered (gdb_stdlog
,
619 "Packet %s (%s) is supported\n",
620 config
->name
, config
->title
);
621 config
->support
= PACKET_ENABLE
;
624 internal_error (__FILE__
, __LINE__
,
625 "packet_ok: attempt to use a disabled packet");
630 if (buf
[0] == 'O' && buf
[1] == 'K' && buf
[2] == '\0')
631 /* "OK" - definitly OK. */
634 && isxdigit (buf
[1]) && isxdigit (buf
[2])
636 /* "Enn" - definitly an error. */
638 /* The packet may or may not be OK. Just assume it is */
643 /* The stub does not support the packet. */
644 switch (config
->support
)
647 if (config
->detect
== CMD_AUTO_BOOLEAN_AUTO
)
648 /* If the stub previously indicated that the packet was
649 supported then there is a protocol error.. */
650 error ("Protocol error: %s (%s) conflicting enabled responses.",
651 config
->name
, config
->title
);
653 /* The user set it wrong. */
654 error ("Enabled packet %s (%s) not recognized by stub",
655 config
->name
, config
->title
);
657 case PACKET_SUPPORT_UNKNOWN
:
659 fprintf_unfiltered (gdb_stdlog
,
660 "Packet %s (%s) is NOT supported\n",
661 config
->name
, config
->title
);
662 config
->support
= PACKET_DISABLE
;
667 return PACKET_UNKNOWN
;
671 /* Should we try the 'e' (step over range) request? */
672 static struct packet_config remote_protocol_e
;
675 set_remote_protocol_e_packet_cmd (char *args
, int from_tty
,
676 struct cmd_list_element
*c
)
678 update_packet_config (&remote_protocol_e
);
682 show_remote_protocol_e_packet_cmd (char *args
, int from_tty
)
684 show_packet_config_cmd (&remote_protocol_e
);
688 /* Should we try the 'E' (step over range / w signal #) request? */
689 static struct packet_config remote_protocol_E
;
692 set_remote_protocol_E_packet_cmd (char *args
, int from_tty
,
693 struct cmd_list_element
*c
)
695 update_packet_config (&remote_protocol_E
);
699 show_remote_protocol_E_packet_cmd (char *args
, int from_tty
)
701 show_packet_config_cmd (&remote_protocol_E
);
705 /* Should we try the 'P' (set register) request? */
707 static struct packet_config remote_protocol_P
;
710 set_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
711 struct cmd_list_element
*c
)
713 update_packet_config (&remote_protocol_P
);
717 show_remote_protocol_P_packet_cmd (char *args
, int from_tty
)
719 show_packet_config_cmd (&remote_protocol_P
);
722 /* Should we try one of the 'Z' requests? */
726 Z_PACKET_SOFTWARE_BP
,
727 Z_PACKET_HARDWARE_BP
,
734 static struct packet_config remote_protocol_Z
[NR_Z_PACKET_TYPES
];
736 /* FIXME: Instead of having all these boiler plate functions, the
737 command callback should include a context argument. */
740 set_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
741 struct cmd_list_element
*c
)
743 update_packet_config (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
747 show_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
)
749 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
753 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
754 struct cmd_list_element
*c
)
756 update_packet_config (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
760 show_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
)
762 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
766 set_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
767 struct cmd_list_element
*c
)
769 update_packet_config (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
773 show_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
)
775 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
779 set_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
780 struct cmd_list_element
*c
)
782 update_packet_config (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
786 show_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
)
788 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
792 set_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
793 struct cmd_list_element
*c
)
795 update_packet_config (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
799 show_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
)
801 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
804 /* For compatibility with older distributions. Provide a ``set remote
805 Z-packet ...'' command that updates all the Z packet types. */
807 static enum cmd_auto_boolean remote_Z_packet_detect
;
810 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
811 struct cmd_list_element
*c
)
814 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
816 remote_protocol_Z
[i
].detect
= remote_Z_packet_detect
;
817 update_packet_config (&remote_protocol_Z
[i
]);
822 show_remote_protocol_Z_packet_cmd (char *args
, int from_tty
)
825 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
827 show_packet_config_cmd (&remote_protocol_Z
[i
]);
831 /* Should we try the 'X' (remote binary download) packet?
833 This variable (available to the user via "set remote X-packet")
834 dictates whether downloads are sent in binary (via the 'X' packet).
835 We assume that the stub can, and attempt to do it. This will be
836 cleared if the stub does not understand it. This switch is still
837 needed, though in cases when the packet is supported in the stub,
838 but the connection does not allow it (i.e., 7-bit serial connection
841 static struct packet_config remote_protocol_binary_download
;
843 /* Should we try the 'ThreadInfo' query packet?
845 This variable (NOT available to the user: auto-detect only!)
846 determines whether GDB will use the new, simpler "ThreadInfo"
847 query or the older, more complex syntax for thread queries.
848 This is an auto-detect variable (set to true at each connect,
849 and set to false when the target fails to recognize it). */
851 static int use_threadinfo_query
;
852 static int use_threadextra_query
;
855 set_remote_protocol_binary_download_cmd (char *args
,
857 struct cmd_list_element
*c
)
859 update_packet_config (&remote_protocol_binary_download
);
863 show_remote_protocol_binary_download_cmd (char *args
,
866 show_packet_config_cmd (&remote_protocol_binary_download
);
870 /* Tokens for use by the asynchronous signal handlers for SIGINT */
871 PTR sigint_remote_twice_token
;
872 PTR sigint_remote_token
;
874 /* These are pointers to hook functions that may be set in order to
875 modify resume/wait behavior for a particular architecture. */
877 void (*target_resume_hook
) (void);
878 void (*target_wait_loop_hook
) (void);
882 /* These are the threads which we last sent to the remote system.
883 -1 for all or -2 for not sent yet. */
884 static int general_thread
;
885 static int continue_thread
;
887 /* Call this function as a result of
888 1) A halt indication (T packet) containing a thread id
889 2) A direct query of currthread
890 3) Successful execution of set thread
894 record_currthread (int currthread
)
896 general_thread
= currthread
;
898 /* If this is a new thread, add it to GDB's thread list.
899 If we leave it up to WFI to do this, bad things will happen. */
900 if (!in_thread_list (pid_to_ptid (currthread
)))
902 add_thread (pid_to_ptid (currthread
));
904 ui_out_text (uiout
, "[New ");
905 ui_out_text (uiout
, target_pid_to_str (pid_to_ptid (currthread
)));
906 ui_out_text (uiout
, "]\n");
908 printf_filtered ("[New %s]\n",
909 target_pid_to_str (pid_to_ptid (currthread
)));
914 #define MAGIC_NULL_PID 42000
917 set_thread (int th
, int gen
)
919 char *buf
= alloca (PBUFSIZ
);
920 int state
= gen
? general_thread
: continue_thread
;
926 buf
[1] = gen
? 'g' : 'c';
927 if (th
== MAGIC_NULL_PID
)
933 sprintf (&buf
[2], "-%x", -th
);
935 sprintf (&buf
[2], "%x", th
);
937 getpkt (buf
, PBUFSIZ
, 0);
941 continue_thread
= th
;
944 /* Return nonzero if the thread TH is still alive on the remote system. */
947 remote_thread_alive (ptid_t ptid
)
949 int tid
= PIDGET (ptid
);
953 sprintf (buf
, "T-%08x", -tid
);
955 sprintf (buf
, "T%08x", tid
);
957 getpkt (buf
, sizeof (buf
), 0);
958 return (buf
[0] == 'O' && buf
[1] == 'K');
961 /* About these extended threadlist and threadinfo packets. They are
962 variable length packets but, the fields within them are often fixed
963 length. They are redundent enough to send over UDP as is the
964 remote protocol in general. There is a matching unit test module
967 #define OPAQUETHREADBYTES 8
969 /* a 64 bit opaque identifier */
970 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
972 /* WARNING: This threadref data structure comes from the remote O.S., libstub
973 protocol encoding, and remote.c. it is not particularly changable */
975 /* Right now, the internal structure is int. We want it to be bigger.
979 typedef int gdb_threadref
; /* internal GDB thread reference */
981 /* gdb_ext_thread_info is an internal GDB data structure which is
982 equivalint to the reply of the remote threadinfo packet */
984 struct gdb_ext_thread_info
986 threadref threadid
; /* External form of thread reference */
987 int active
; /* Has state interesting to GDB? , regs, stack */
988 char display
[256]; /* Brief state display, name, blocked/syspended */
989 char shortname
[32]; /* To be used to name threads */
990 char more_display
[256]; /* Long info, statistics, queue depth, whatever */
993 /* The volume of remote transfers can be limited by submitting
994 a mask containing bits specifying the desired information.
995 Use a union of these values as the 'selection' parameter to
996 get_thread_info. FIXME: Make these TAG names more thread specific.
999 #define TAG_THREADID 1
1000 #define TAG_EXISTS 2
1001 #define TAG_DISPLAY 4
1002 #define TAG_THREADNAME 8
1003 #define TAG_MOREDISPLAY 16
1005 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
1007 char *unpack_varlen_hex (char *buff
, int *result
);
1009 static char *unpack_nibble (char *buf
, int *val
);
1011 static char *pack_nibble (char *buf
, int nibble
);
1013 static char *pack_hex_byte (char *pkt
, int /*unsigned char */ byte
);
1015 static char *unpack_byte (char *buf
, int *value
);
1017 static char *pack_int (char *buf
, int value
);
1019 static char *unpack_int (char *buf
, int *value
);
1021 static char *unpack_string (char *src
, char *dest
, int length
);
1023 static char *pack_threadid (char *pkt
, threadref
* id
);
1025 static char *unpack_threadid (char *inbuf
, threadref
* id
);
1027 void int_to_threadref (threadref
* id
, int value
);
1029 static int threadref_to_int (threadref
* ref
);
1031 static void copy_threadref (threadref
* dest
, threadref
* src
);
1033 static int threadmatch (threadref
* dest
, threadref
* src
);
1035 static char *pack_threadinfo_request (char *pkt
, int mode
, threadref
* id
);
1037 static int remote_unpack_thread_info_response (char *pkt
,
1038 threadref
* expectedref
,
1039 struct gdb_ext_thread_info
1043 static int remote_get_threadinfo (threadref
* threadid
, int fieldset
, /*TAG mask */
1044 struct gdb_ext_thread_info
*info
);
1046 static int adapt_remote_get_threadinfo (gdb_threadref
* ref
,
1048 struct gdb_ext_thread_info
*info
);
1050 static char *pack_threadlist_request (char *pkt
, int startflag
,
1052 threadref
* nextthread
);
1054 static int parse_threadlist_response (char *pkt
,
1056 threadref
* original_echo
,
1057 threadref
* resultlist
, int *doneflag
);
1059 static int remote_get_threadlist (int startflag
,
1060 threadref
* nextthread
,
1063 int *result_count
, threadref
* threadlist
);
1065 typedef int (*rmt_thread_action
) (threadref
* ref
, void *context
);
1067 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1068 void *context
, int looplimit
);
1070 static int remote_newthread_step (threadref
* ref
, void *context
);
1072 /* encode 64 bits in 16 chars of hex */
1074 static const char hexchars
[] = "0123456789abcdef";
1077 ishex (int ch
, int *val
)
1079 if ((ch
>= 'a') && (ch
<= 'f'))
1081 *val
= ch
- 'a' + 10;
1084 if ((ch
>= 'A') && (ch
<= 'F'))
1086 *val
= ch
- 'A' + 10;
1089 if ((ch
>= '0') && (ch
<= '9'))
1100 if (ch
>= 'a' && ch
<= 'f')
1101 return ch
- 'a' + 10;
1102 if (ch
>= '0' && ch
<= '9')
1104 if (ch
>= 'A' && ch
<= 'F')
1105 return ch
- 'A' + 10;
1110 stub_unpack_int (char *buff
, int fieldlength
)
1117 nibble
= stubhex (*buff
++);
1121 retval
= retval
<< 4;
1127 unpack_varlen_hex (char *buff
, /* packet to parse */
1133 while (ishex (*buff
, &nibble
))
1136 retval
= retval
<< 4;
1137 retval
|= nibble
& 0x0f;
1144 unpack_nibble (char *buf
, int *val
)
1146 ishex (*buf
++, val
);
1151 pack_nibble (char *buf
, int nibble
)
1153 *buf
++ = hexchars
[(nibble
& 0x0f)];
1158 pack_hex_byte (char *pkt
, int byte
)
1160 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1161 *pkt
++ = hexchars
[(byte
& 0xf)];
1166 unpack_byte (char *buf
, int *value
)
1168 *value
= stub_unpack_int (buf
, 2);
1173 pack_int (char *buf
, int value
)
1175 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1176 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1177 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1178 buf
= pack_hex_byte (buf
, (value
& 0xff));
1183 unpack_int (char *buf
, int *value
)
1185 *value
= stub_unpack_int (buf
, 8);
1189 #if 0 /* currently unused, uncomment when needed */
1190 static char *pack_string (char *pkt
, char *string
);
1193 pack_string (char *pkt
, char *string
)
1198 len
= strlen (string
);
1200 len
= 200; /* Bigger than most GDB packets, junk??? */
1201 pkt
= pack_hex_byte (pkt
, len
);
1205 if ((ch
== '\0') || (ch
== '#'))
1206 ch
= '*'; /* Protect encapsulation */
1211 #endif /* 0 (unused) */
1214 unpack_string (char *src
, char *dest
, int length
)
1223 pack_threadid (char *pkt
, threadref
*id
)
1226 unsigned char *altid
;
1228 altid
= (unsigned char *) id
;
1229 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1231 pkt
= pack_hex_byte (pkt
, *altid
++);
1237 unpack_threadid (char *inbuf
, threadref
*id
)
1240 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1243 altref
= (char *) id
;
1245 while (inbuf
< limit
)
1247 x
= stubhex (*inbuf
++);
1248 y
= stubhex (*inbuf
++);
1249 *altref
++ = (x
<< 4) | y
;
1254 /* Externally, threadrefs are 64 bits but internally, they are still
1255 ints. This is due to a mismatch of specifications. We would like
1256 to use 64bit thread references internally. This is an adapter
1260 int_to_threadref (threadref
*id
, int value
)
1262 unsigned char *scan
;
1264 scan
= (unsigned char *) id
;
1270 *scan
++ = (value
>> 24) & 0xff;
1271 *scan
++ = (value
>> 16) & 0xff;
1272 *scan
++ = (value
>> 8) & 0xff;
1273 *scan
++ = (value
& 0xff);
1277 threadref_to_int (threadref
*ref
)
1280 unsigned char *scan
;
1282 scan
= (char *) ref
;
1286 value
= (value
<< 8) | ((*scan
++) & 0xff);
1291 copy_threadref (threadref
*dest
, threadref
*src
)
1294 unsigned char *csrc
, *cdest
;
1296 csrc
= (unsigned char *) src
;
1297 cdest
= (unsigned char *) dest
;
1304 threadmatch (threadref
*dest
, threadref
*src
)
1306 /* things are broken right now, so just assume we got a match */
1308 unsigned char *srcp
, *destp
;
1310 srcp
= (char *) src
;
1311 destp
= (char *) dest
;
1315 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1322 threadid:1, # always request threadid
1329 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1332 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1334 *pkt
++ = 'q'; /* Info Query */
1335 *pkt
++ = 'P'; /* process or thread info */
1336 pkt
= pack_int (pkt
, mode
); /* mode */
1337 pkt
= pack_threadid (pkt
, id
); /* threadid */
1338 *pkt
= '\0'; /* terminate */
1342 /* These values tag the fields in a thread info response packet */
1343 /* Tagging the fields allows us to request specific fields and to
1344 add more fields as time goes by */
1346 #define TAG_THREADID 1 /* Echo the thread identifier */
1347 #define TAG_EXISTS 2 /* Is this process defined enough to
1348 fetch registers and its stack */
1349 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1350 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
1351 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1355 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1356 struct gdb_ext_thread_info
*info
)
1361 char *limit
= pkt
+ PBUFSIZ
; /* plausable parsing limit */
1364 /* info->threadid = 0; FIXME: implement zero_threadref */
1366 info
->display
[0] = '\0';
1367 info
->shortname
[0] = '\0';
1368 info
->more_display
[0] = '\0';
1370 /* Assume the characters indicating the packet type have been stripped */
1371 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1372 pkt
= unpack_threadid (pkt
, &ref
);
1375 warning ("Incomplete response to threadinfo request\n");
1376 if (!threadmatch (&ref
, expectedref
))
1377 { /* This is an answer to a different request */
1378 warning ("ERROR RMT Thread info mismatch\n");
1381 copy_threadref (&info
->threadid
, &ref
);
1383 /* Loop on tagged fields , try to bail if somthing goes wrong */
1385 while ((pkt
< limit
) && mask
&& *pkt
) /* packets are terminated with nulls */
1387 pkt
= unpack_int (pkt
, &tag
); /* tag */
1388 pkt
= unpack_byte (pkt
, &length
); /* length */
1389 if (!(tag
& mask
)) /* tags out of synch with mask */
1391 warning ("ERROR RMT: threadinfo tag mismatch\n");
1395 if (tag
== TAG_THREADID
)
1399 warning ("ERROR RMT: length of threadid is not 16\n");
1403 pkt
= unpack_threadid (pkt
, &ref
);
1404 mask
= mask
& ~TAG_THREADID
;
1407 if (tag
== TAG_EXISTS
)
1409 info
->active
= stub_unpack_int (pkt
, length
);
1411 mask
= mask
& ~(TAG_EXISTS
);
1414 warning ("ERROR RMT: 'exists' length too long\n");
1420 if (tag
== TAG_THREADNAME
)
1422 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1423 mask
= mask
& ~TAG_THREADNAME
;
1426 if (tag
== TAG_DISPLAY
)
1428 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1429 mask
= mask
& ~TAG_DISPLAY
;
1432 if (tag
== TAG_MOREDISPLAY
)
1434 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1435 mask
= mask
& ~TAG_MOREDISPLAY
;
1438 warning ("ERROR RMT: unknown thread info tag\n");
1439 break; /* Not a tag we know about */
1445 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1446 struct gdb_ext_thread_info
*info
)
1449 char *threadinfo_pkt
= alloca (PBUFSIZ
);
1451 pack_threadinfo_request (threadinfo_pkt
, fieldset
, threadid
);
1452 putpkt (threadinfo_pkt
);
1453 getpkt (threadinfo_pkt
, PBUFSIZ
, 0);
1454 result
= remote_unpack_thread_info_response (threadinfo_pkt
+ 2, threadid
,
1459 /* Unfortunately, 61 bit thread-ids are bigger than the internal
1460 representation of a threadid. */
1463 adapt_remote_get_threadinfo (gdb_threadref
*ref
, int selection
,
1464 struct gdb_ext_thread_info
*info
)
1468 int_to_threadref (&lclref
, *ref
);
1469 return remote_get_threadinfo (&lclref
, selection
, info
);
1472 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1475 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1476 threadref
*nextthread
)
1478 *pkt
++ = 'q'; /* info query packet */
1479 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1480 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1481 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1482 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1487 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1490 parse_threadlist_response (char *pkt
, int result_limit
,
1491 threadref
*original_echo
, threadref
*resultlist
,
1495 int count
, resultcount
, done
;
1498 /* Assume the 'q' and 'M chars have been stripped. */
1499 limit
= pkt
+ (PBUFSIZ
- BUF_THREAD_ID_SIZE
); /* done parse past here */
1500 pkt
= unpack_byte (pkt
, &count
); /* count field */
1501 pkt
= unpack_nibble (pkt
, &done
);
1502 /* The first threadid is the argument threadid. */
1503 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1504 while ((count
-- > 0) && (pkt
< limit
))
1506 pkt
= unpack_threadid (pkt
, resultlist
++);
1507 if (resultcount
++ >= result_limit
)
1516 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1517 int *done
, int *result_count
, threadref
*threadlist
)
1519 static threadref echo_nextthread
;
1520 char *threadlist_packet
= alloca (PBUFSIZ
);
1521 char *t_response
= alloca (PBUFSIZ
);
1524 /* Trancate result limit to be smaller than the packet size */
1525 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= PBUFSIZ
)
1526 result_limit
= (PBUFSIZ
/ BUF_THREAD_ID_SIZE
) - 2;
1528 pack_threadlist_request (threadlist_packet
,
1529 startflag
, result_limit
, nextthread
);
1530 putpkt (threadlist_packet
);
1531 getpkt (t_response
, PBUFSIZ
, 0);
1534 parse_threadlist_response (t_response
+ 2, result_limit
, &echo_nextthread
,
1537 if (!threadmatch (&echo_nextthread
, nextthread
))
1539 /* FIXME: This is a good reason to drop the packet */
1540 /* Possably, there is a duplicate response */
1542 retransmit immediatly - race conditions
1543 retransmit after timeout - yes
1545 wait for packet, then exit
1547 warning ("HMM: threadlist did not echo arg thread, dropping it\n");
1548 return 0; /* I choose simply exiting */
1550 if (*result_count
<= 0)
1554 warning ("RMT ERROR : failed to get remote thread list\n");
1557 return result
; /* break; */
1559 if (*result_count
> result_limit
)
1562 warning ("RMT ERROR: threadlist response longer than requested\n");
1568 /* This is the interface between remote and threads, remotes upper interface */
1570 /* remote_find_new_threads retrieves the thread list and for each
1571 thread in the list, looks up the thread in GDB's internal list,
1572 ading the thread if it does not already exist. This involves
1573 getting partial thread lists from the remote target so, polling the
1574 quit_flag is required. */
1577 /* About this many threadisds fit in a packet. */
1579 #define MAXTHREADLISTRESULTS 32
1582 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1585 int done
, i
, result_count
;
1589 static threadref nextthread
;
1590 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1595 if (loopcount
++ > looplimit
)
1598 warning ("Remote fetch threadlist -infinite loop-\n");
1601 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1602 &done
, &result_count
, resultthreadlist
))
1607 /* clear for later iterations */
1609 /* Setup to resume next batch of thread references, set nextthread. */
1610 if (result_count
>= 1)
1611 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1613 while (result_count
--)
1614 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1621 remote_newthread_step (threadref
*ref
, void *context
)
1625 ptid
= pid_to_ptid (threadref_to_int (ref
));
1627 if (!in_thread_list (ptid
))
1629 return 1; /* continue iterator */
1632 #define CRAZY_MAX_THREADS 1000
1635 remote_current_thread (ptid_t oldpid
)
1637 char *buf
= alloca (PBUFSIZ
);
1640 getpkt (buf
, PBUFSIZ
, 0);
1641 if (buf
[0] == 'Q' && buf
[1] == 'C')
1642 return pid_to_ptid (strtol (&buf
[2], NULL
, 16));
1647 /* Find new threads for info threads command.
1648 * Original version, using John Metzler's thread protocol.
1652 remote_find_new_threads (void)
1654 remote_threadlist_iterator (remote_newthread_step
, 0,
1656 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
) /* ack ack ack */
1657 inferior_ptid
= remote_current_thread (inferior_ptid
);
1661 * Find all threads for info threads command.
1662 * Uses new thread protocol contributed by Cisco.
1663 * Falls back and attempts to use the older method (above)
1664 * if the target doesn't respond to the new method.
1668 remote_threads_info (void)
1670 char *buf
= alloca (PBUFSIZ
);
1674 if (remote_desc
== 0) /* paranoia */
1675 error ("Command can only be used when connected to the remote target.");
1677 if (use_threadinfo_query
)
1679 putpkt ("qfThreadInfo");
1681 getpkt (bufp
, PBUFSIZ
, 0);
1682 if (bufp
[0] != '\0') /* q packet recognized */
1684 while (*bufp
++ == 'm') /* reply contains one or more TID */
1688 tid
= strtol (bufp
, &bufp
, 16);
1689 if (tid
!= 0 && !in_thread_list (pid_to_ptid (tid
)))
1690 add_thread (pid_to_ptid (tid
));
1692 while (*bufp
++ == ','); /* comma-separated list */
1693 putpkt ("qsThreadInfo");
1695 getpkt (bufp
, PBUFSIZ
, 0);
1701 /* Else fall back to old method based on jmetzler protocol. */
1702 use_threadinfo_query
= 0;
1703 remote_find_new_threads ();
1708 * Collect a descriptive string about the given thread.
1709 * The target may say anything it wants to about the thread
1710 * (typically info about its blocked / runnable state, name, etc.).
1711 * This string will appear in the info threads display.
1713 * Optional: targets are not required to implement this function.
1717 remote_threads_extra_info (struct thread_info
*tp
)
1722 struct gdb_ext_thread_info threadinfo
;
1723 static char display_buf
[100]; /* arbitrary... */
1724 char *bufp
= alloca (PBUFSIZ
);
1725 int n
= 0; /* position in display_buf */
1727 if (remote_desc
== 0) /* paranoia */
1728 internal_error (__FILE__
, __LINE__
,
1729 "remote_threads_extra_info");
1731 if (use_threadextra_query
)
1733 sprintf (bufp
, "qThreadExtraInfo,%x", PIDGET (tp
->ptid
));
1735 getpkt (bufp
, PBUFSIZ
, 0);
1740 for (p
= display_buf
;
1741 p
< display_buf
+ sizeof(display_buf
) - 1 &&
1746 *p
= fromhex (bufp
[0]) * 16 + fromhex (bufp
[1]);
1753 /* If the above query fails, fall back to the old method. */
1754 use_threadextra_query
= 0;
1755 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1756 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1757 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1758 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1759 if (threadinfo
.active
)
1761 if (*threadinfo
.shortname
)
1762 n
+= sprintf(&display_buf
[0], " Name: %s,", threadinfo
.shortname
);
1763 if (*threadinfo
.display
)
1764 n
+= sprintf(&display_buf
[n
], " State: %s,", threadinfo
.display
);
1765 if (*threadinfo
.more_display
)
1766 n
+= sprintf(&display_buf
[n
], " Priority: %s",
1767 threadinfo
.more_display
);
1771 /* for purely cosmetic reasons, clear up trailing commas */
1772 if (',' == display_buf
[n
-1])
1773 display_buf
[n
-1] = ' ';
1782 /* Restart the remote side; this is an extended protocol operation. */
1785 extended_remote_restart (void)
1787 char *buf
= alloca (PBUFSIZ
);
1789 /* Send the restart command; for reasons I don't understand the
1790 remote side really expects a number after the "R". */
1792 sprintf (&buf
[1], "%x", 0);
1795 /* Now query for status so this looks just like we restarted
1796 gdbserver from scratch. */
1798 getpkt (buf
, PBUFSIZ
, 0);
1801 /* Clean up connection to a remote debugger. */
1805 remote_close (int quitting
)
1808 SERIAL_CLOSE (remote_desc
);
1812 /* Query the remote side for the text, data and bss offsets. */
1817 char *buf
= alloca (PBUFSIZ
);
1820 CORE_ADDR text_addr
, data_addr
, bss_addr
;
1821 struct section_offsets
*offs
;
1823 putpkt ("qOffsets");
1825 getpkt (buf
, PBUFSIZ
, 0);
1827 if (buf
[0] == '\000')
1828 return; /* Return silently. Stub doesn't support
1832 warning ("Remote failure reply: %s", buf
);
1836 /* Pick up each field in turn. This used to be done with scanf, but
1837 scanf will make trouble if CORE_ADDR size doesn't match
1838 conversion directives correctly. The following code will work
1839 with any size of CORE_ADDR. */
1840 text_addr
= data_addr
= bss_addr
= 0;
1844 if (strncmp (ptr
, "Text=", 5) == 0)
1847 /* Don't use strtol, could lose on big values. */
1848 while (*ptr
&& *ptr
!= ';')
1849 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
1854 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
1857 while (*ptr
&& *ptr
!= ';')
1858 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
1863 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
1866 while (*ptr
&& *ptr
!= ';')
1867 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
1873 error ("Malformed response to offset query, %s", buf
);
1875 if (symfile_objfile
== NULL
)
1878 offs
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1879 memcpy (offs
, symfile_objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1881 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
1883 /* This is a temporary kludge to force data and bss to use the same offsets
1884 because that's what nlmconv does now. The real solution requires changes
1885 to the stub and remote.c that I don't have time to do right now. */
1887 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
1888 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
1890 objfile_relocate (symfile_objfile
, offs
);
1894 * Cisco version of section offsets:
1896 * Instead of having GDB query the target for the section offsets,
1897 * Cisco lets the target volunteer the information! It's also in
1898 * a different format, so here are the functions that will decode
1899 * a section offset packet from a Cisco target.
1903 * Function: remote_cisco_section_offsets
1905 * Returns: zero for success, non-zero for failure
1909 remote_cisco_section_offsets (bfd_vma text_addr
,
1912 bfd_signed_vma
*text_offs
,
1913 bfd_signed_vma
*data_offs
,
1914 bfd_signed_vma
*bss_offs
)
1916 bfd_vma text_base
, data_base
, bss_base
;
1917 struct minimal_symbol
*start
;
1922 if (symfile_objfile
== NULL
)
1923 return -1; /* no can do nothin' */
1925 start
= lookup_minimal_symbol ("_start", NULL
, NULL
);
1927 return -1; /* Can't find "_start" symbol */
1929 data_base
= bss_base
= 0;
1930 text_base
= SYMBOL_VALUE_ADDRESS (start
);
1932 abfd
= symfile_objfile
->obfd
;
1933 for (sect
= abfd
->sections
;
1937 const char *p
= bfd_get_section_name (abfd
, sect
);
1939 if (strcmp (p
+ len
- 4, "data") == 0) /* ends in "data" */
1940 if (data_base
== 0 ||
1941 data_base
> bfd_get_section_vma (abfd
, sect
))
1942 data_base
= bfd_get_section_vma (abfd
, sect
);
1943 if (strcmp (p
+ len
- 3, "bss") == 0) /* ends in "bss" */
1944 if (bss_base
== 0 ||
1945 bss_base
> bfd_get_section_vma (abfd
, sect
))
1946 bss_base
= bfd_get_section_vma (abfd
, sect
);
1948 *text_offs
= text_addr
- text_base
;
1949 *data_offs
= data_addr
- data_base
;
1950 *bss_offs
= bss_addr
- bss_base
;
1955 sprintf (tmp
, "VMA: text = 0x");
1956 sprintf_vma (tmp
+ strlen (tmp
), text_addr
);
1957 sprintf (tmp
+ strlen (tmp
), " data = 0x");
1958 sprintf_vma (tmp
+ strlen (tmp
), data_addr
);
1959 sprintf (tmp
+ strlen (tmp
), " bss = 0x");
1960 sprintf_vma (tmp
+ strlen (tmp
), bss_addr
);
1961 fprintf_filtered (gdb_stdlog
, tmp
);
1962 fprintf_filtered (gdb_stdlog
,
1963 "Reloc offset: text = 0x%s data = 0x%s bss = 0x%s\n",
1964 paddr_nz (*text_offs
),
1965 paddr_nz (*data_offs
),
1966 paddr_nz (*bss_offs
));
1973 * Function: remote_cisco_objfile_relocate
1975 * Relocate the symbol file for a remote target.
1979 remote_cisco_objfile_relocate (bfd_signed_vma text_off
, bfd_signed_vma data_off
,
1980 bfd_signed_vma bss_off
)
1982 struct section_offsets
*offs
;
1984 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
1986 /* FIXME: This code assumes gdb-stabs.h is being used; it's
1987 broken for xcoff, dwarf, sdb-coff, etc. But there is no
1988 simple canonical representation for this stuff. */
1990 offs
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1991 memcpy (offs
, symfile_objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1993 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_off
;
1994 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_off
;
1995 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = bss_off
;
1997 /* First call the standard objfile_relocate. */
1998 objfile_relocate (symfile_objfile
, offs
);
2000 /* Now we need to fix up the section entries already attached to
2001 the exec target. These entries will control memory transfers
2002 from the exec file. */
2004 exec_set_section_offsets (text_off
, data_off
, bss_off
);
2008 /* Stub for catch_errors. */
2011 remote_start_remote_dummy (void *dummy
)
2013 start_remote (); /* Initialize gdb process mechanisms */
2018 remote_start_remote (PTR dummy
)
2020 immediate_quit
++; /* Allow user to interrupt it */
2022 /* Ack any packet which the remote side has already sent. */
2023 SERIAL_WRITE (remote_desc
, "+", 1);
2025 /* Let the stub know that we want it to return the thread. */
2028 inferior_ptid
= remote_current_thread (inferior_ptid
);
2030 get_offsets (); /* Get text, data & bss offsets */
2032 putpkt ("?"); /* initiate a query from remote machine */
2035 return remote_start_remote_dummy (dummy
);
2038 /* Open a connection to a remote debugger.
2039 NAME is the filename used for communication. */
2042 remote_open (char *name
, int from_tty
)
2044 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2047 /* Just like remote_open, but with asynchronous support. */
2049 remote_async_open (char *name
, int from_tty
)
2051 remote_async_open_1 (name
, from_tty
, &remote_async_ops
, 0);
2054 /* Open a connection to a remote debugger using the extended
2055 remote gdb protocol. NAME is the filename used for communication. */
2058 extended_remote_open (char *name
, int from_tty
)
2060 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */ );
2063 /* Just like extended_remote_open, but with asynchronous support. */
2065 extended_remote_async_open (char *name
, int from_tty
)
2067 remote_async_open_1 (name
, from_tty
, &extended_async_remote_ops
, 1 /*extended_p */ );
2070 /* Generic code for opening a connection to a remote target. */
2073 init_all_packet_configs (void)
2076 update_packet_config (&remote_protocol_e
);
2077 update_packet_config (&remote_protocol_E
);
2078 update_packet_config (&remote_protocol_P
);
2079 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2080 update_packet_config (&remote_protocol_Z
[i
]);
2081 /* Force remote_write_bytes to check whether target supports binary
2083 update_packet_config (&remote_protocol_binary_download
);
2087 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2091 error ("To open a remote debug connection, you need to specify what\n\
2092 serial device is attached to the remote system\n\
2093 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2095 /* See FIXME above */
2096 wait_forever_enabled_p
= 1;
2098 target_preopen (from_tty
);
2100 unpush_target (target
);
2102 remote_desc
= SERIAL_OPEN (name
);
2104 perror_with_name (name
);
2106 if (baud_rate
!= -1)
2108 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
2110 SERIAL_CLOSE (remote_desc
);
2111 perror_with_name (name
);
2115 SERIAL_RAW (remote_desc
);
2117 /* If there is something sitting in the buffer we might take it as a
2118 response to a command, which would be bad. */
2119 SERIAL_FLUSH_INPUT (remote_desc
);
2123 puts_filtered ("Remote debugging using ");
2124 puts_filtered (name
);
2125 puts_filtered ("\n");
2127 push_target (target
); /* Switch to using remote target now */
2129 init_all_packet_configs ();
2131 general_thread
= -2;
2132 continue_thread
= -2;
2134 /* Probe for ability to use "ThreadInfo" query, as required. */
2135 use_threadinfo_query
= 1;
2136 use_threadextra_query
= 1;
2138 /* Without this, some commands which require an active target (such
2139 as kill) won't work. This variable serves (at least) double duty
2140 as both the pid of the target process (if it has such), and as a
2141 flag indicating that a target is active. These functions should
2142 be split out into seperate variables, especially since GDB will
2143 someday have a notion of debugging several processes. */
2145 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2146 /* Start the remote connection; if error (0), discard this target.
2147 In particular, if the user quits, be sure to discard it
2148 (we'd be in an inconsistent state otherwise). */
2149 if (!catch_errors (remote_start_remote
, NULL
,
2150 "Couldn't establish connection to remote target\n",
2159 /* Tell the remote that we are using the extended protocol. */
2160 char *buf
= alloca (PBUFSIZ
);
2162 getpkt (buf
, PBUFSIZ
, 0);
2164 /* FIXME: need a master target_open vector from which all
2165 remote_opens can be called, so that stuff like this can
2166 go there. Failing that, the following code must be copied
2167 to the open function for any remote target that wants to
2168 support svr4 shared libraries. */
2169 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2170 if (exec_bfd
) /* No use without an exec file. */
2171 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
2175 /* Just like remote_open but with asynchronous support. */
2177 remote_async_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2181 error ("To open a remote debug connection, you need to specify what\n\
2182 serial device is attached to the remote system\n\
2183 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2185 target_preopen (from_tty
);
2187 unpush_target (target
);
2189 remote_desc
= SERIAL_OPEN (name
);
2191 perror_with_name (name
);
2193 if (baud_rate
!= -1)
2195 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
2197 SERIAL_CLOSE (remote_desc
);
2198 perror_with_name (name
);
2202 SERIAL_RAW (remote_desc
);
2204 /* If there is something sitting in the buffer we might take it as a
2205 response to a command, which would be bad. */
2206 SERIAL_FLUSH_INPUT (remote_desc
);
2210 puts_filtered ("Remote debugging using ");
2211 puts_filtered (name
);
2212 puts_filtered ("\n");
2215 push_target (target
); /* Switch to using remote target now */
2217 init_all_packet_configs ();
2219 general_thread
= -2;
2220 continue_thread
= -2;
2222 /* Probe for ability to use "ThreadInfo" query, as required. */
2223 use_threadinfo_query
= 1;
2224 use_threadextra_query
= 1;
2226 /* Without this, some commands which require an active target (such
2227 as kill) won't work. This variable serves (at least) double duty
2228 as both the pid of the target process (if it has such), and as a
2229 flag indicating that a target is active. These functions should
2230 be split out into seperate variables, especially since GDB will
2231 someday have a notion of debugging several processes. */
2232 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2234 /* With this target we start out by owning the terminal. */
2235 remote_async_terminal_ours_p
= 1;
2237 /* FIXME: cagney/1999-09-23: During the initial connection it is
2238 assumed that the target is already ready and able to respond to
2239 requests. Unfortunately remote_start_remote() eventually calls
2240 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2241 around this. Eventually a mechanism that allows
2242 wait_for_inferior() to expect/get timeouts will be
2244 wait_forever_enabled_p
= 0;
2246 /* Start the remote connection; if error (0), discard this target.
2247 In particular, if the user quits, be sure to discard it
2248 (we'd be in an inconsistent state otherwise). */
2249 if (!catch_errors (remote_start_remote
, NULL
,
2250 "Couldn't establish connection to remote target\n",
2254 wait_forever_enabled_p
= 1;
2258 wait_forever_enabled_p
= 1;
2262 /* Tell the remote that we are using the extended protocol. */
2263 char *buf
= alloca (PBUFSIZ
);
2265 getpkt (buf
, PBUFSIZ
, 0);
2267 /* FIXME: need a master target_open vector from which all
2268 remote_opens can be called, so that stuff like this can
2269 go there. Failing that, the following code must be copied
2270 to the open function for any remote target that wants to
2271 support svr4 shared libraries. */
2272 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2273 if (exec_bfd
) /* No use without an exec file. */
2274 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
2278 /* This takes a program previously attached to and detaches it. After
2279 this is done, GDB can be used to debug some other program. We
2280 better not have left any breakpoints in the target program or it'll
2281 die when it hits one. */
2284 remote_detach (char *args
, int from_tty
)
2286 char *buf
= alloca (PBUFSIZ
);
2289 error ("Argument given to \"detach\" when remotely debugging.");
2291 /* Tell the remote target to detach. */
2293 remote_send (buf
, PBUFSIZ
);
2295 target_mourn_inferior ();
2297 puts_filtered ("Ending remote debugging.\n");
2301 /* Same as remote_detach, but with async support. */
2303 remote_async_detach (char *args
, int from_tty
)
2305 char *buf
= alloca (PBUFSIZ
);
2308 error ("Argument given to \"detach\" when remotely debugging.");
2310 /* Tell the remote target to detach. */
2312 remote_send (buf
, PBUFSIZ
);
2314 /* Unregister the file descriptor from the event loop. */
2315 if (target_is_async_p ())
2316 SERIAL_ASYNC (remote_desc
, NULL
, 0);
2318 target_mourn_inferior ();
2320 puts_filtered ("Ending remote debugging.\n");
2323 /* Convert hex digit A to a number. */
2328 if (a
>= '0' && a
<= '9')
2330 else if (a
>= 'a' && a
<= 'f')
2331 return a
- 'a' + 10;
2332 else if (a
>= 'A' && a
<= 'F')
2333 return a
- 'A' + 10;
2335 error ("Reply contains invalid hex digit %d", a
);
2338 /* Convert number NIB to a hex digit. */
2346 return 'a' + nib
- 10;
2349 /* Tell the remote machine to resume. */
2351 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2353 static int last_sent_step
;
2356 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2358 char *buf
= alloca (PBUFSIZ
);
2359 int pid
= PIDGET (ptid
);
2363 set_thread (0, 0); /* run any thread */
2365 set_thread (pid
, 0); /* run this thread */
2367 last_sent_signal
= siggnal
;
2368 last_sent_step
= step
;
2370 /* A hook for when we need to do something at the last moment before
2372 if (target_resume_hook
)
2373 (*target_resume_hook
) ();
2376 /* The s/S/c/C packets do not return status. So if the target does
2377 not support the S or C packets, the debug agent returns an empty
2378 string which is detected in remote_wait(). This protocol defect
2379 is fixed in the e/E packets. */
2381 if (step
&& step_range_end
)
2383 /* If the target does not support the 'E' packet, we try the 'S'
2384 packet. Ideally we would fall back to the 'e' packet if that
2385 too is not supported. But that would require another copy of
2386 the code to issue the 'e' packet (and fall back to 's' if not
2387 supported) in remote_wait(). */
2389 if (siggnal
!= TARGET_SIGNAL_0
)
2391 if (remote_protocol_E
.support
!= PACKET_DISABLE
)
2395 *p
++ = tohex (((int) siggnal
>> 4) & 0xf);
2396 *p
++ = tohex (((int) siggnal
) & 0xf);
2398 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2400 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2404 getpkt (buf
, PBUFSIZ
, 0);
2406 if (packet_ok(buf
, &remote_protocol_E
) == PACKET_OK
)
2412 if (remote_protocol_e
.support
!= PACKET_DISABLE
)
2416 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2418 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2422 getpkt (buf
, PBUFSIZ
, 0);
2424 if (packet_ok(buf
, &remote_protocol_e
) == PACKET_OK
)
2430 if (siggnal
!= TARGET_SIGNAL_0
)
2432 buf
[0] = step
? 'S' : 'C';
2433 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2434 buf
[2] = tohex (((int) siggnal
) & 0xf);
2438 strcpy (buf
, step
? "s" : "c");
2443 /* Same as remote_resume, but with async support. */
2445 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2447 char *buf
= alloca (PBUFSIZ
);
2448 int pid
= PIDGET (ptid
);
2452 set_thread (0, 0); /* run any thread */
2454 set_thread (pid
, 0); /* run this thread */
2456 last_sent_signal
= siggnal
;
2457 last_sent_step
= step
;
2459 /* A hook for when we need to do something at the last moment before
2461 if (target_resume_hook
)
2462 (*target_resume_hook
) ();
2464 /* The s/S/c/C packets do not return status. So if the target does
2465 not support the S or C packets, the debug agent returns an empty
2466 string which is detected in remote_wait(). This protocol defect
2467 is fixed in the e/E packets. */
2469 if (step
&& step_range_end
)
2471 /* If the target does not support the 'E' packet, we try the 'S'
2472 packet. Ideally we would fall back to the 'e' packet if that
2473 too is not supported. But that would require another copy of
2474 the code to issue the 'e' packet (and fall back to 's' if not
2475 supported) in remote_wait(). */
2477 if (siggnal
!= TARGET_SIGNAL_0
)
2479 if (remote_protocol_E
.support
!= PACKET_DISABLE
)
2483 *p
++ = tohex (((int) siggnal
>> 4) & 0xf);
2484 *p
++ = tohex (((int) siggnal
) & 0xf);
2486 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2488 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2492 getpkt (buf
, PBUFSIZ
, 0);
2494 if (packet_ok(buf
, &remote_protocol_E
) == PACKET_OK
)
2495 goto register_event_loop
;
2500 if (remote_protocol_e
.support
!= PACKET_DISABLE
)
2504 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2506 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2510 getpkt (buf
, PBUFSIZ
, 0);
2512 if (packet_ok(buf
, &remote_protocol_e
) == PACKET_OK
)
2513 goto register_event_loop
;
2518 if (siggnal
!= TARGET_SIGNAL_0
)
2520 buf
[0] = step
? 'S' : 'C';
2521 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2522 buf
[2] = tohex ((int) siggnal
& 0xf);
2526 strcpy (buf
, step
? "s" : "c");
2530 register_event_loop
:
2531 /* We are about to start executing the inferior, let's register it
2532 with the event loop. NOTE: this is the one place where all the
2533 execution commands end up. We could alternatively do this in each
2534 of the execution commands in infcmd.c.*/
2535 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2536 into infcmd.c in order to allow inferior function calls to work
2537 NOT asynchronously. */
2538 if (event_loop_p
&& target_can_async_p ())
2539 target_async (inferior_event_handler
, 0);
2540 /* Tell the world that the target is now executing. */
2541 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2542 this? Instead, should the client of target just assume (for
2543 async targets) that the target is going to start executing? Is
2544 this information already found in the continuation block? */
2545 if (target_is_async_p ())
2546 target_executing
= 1;
2550 /* Set up the signal handler for SIGINT, while the target is
2551 executing, ovewriting the 'regular' SIGINT signal handler. */
2553 initialize_sigint_signal_handler (void)
2555 sigint_remote_token
=
2556 create_async_signal_handler (async_remote_interrupt
, NULL
);
2557 signal (SIGINT
, handle_remote_sigint
);
2560 /* Signal handler for SIGINT, while the target is executing. */
2562 handle_remote_sigint (int sig
)
2564 signal (sig
, handle_remote_sigint_twice
);
2565 sigint_remote_twice_token
=
2566 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2567 mark_async_signal_handler_wrapper (sigint_remote_token
);
2570 /* Signal handler for SIGINT, installed after SIGINT has already been
2571 sent once. It will take effect the second time that the user sends
2574 handle_remote_sigint_twice (int sig
)
2576 signal (sig
, handle_sigint
);
2577 sigint_remote_twice_token
=
2578 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2579 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2582 /* Perform the real interruption of the target execution, in response
2585 async_remote_interrupt (gdb_client_data arg
)
2588 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2593 /* Perform interrupt, if the first attempt did not succeed. Just give
2594 up on the target alltogether. */
2596 async_remote_interrupt_twice (gdb_client_data arg
)
2599 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2600 /* Do something only if the target was not killed by the previous
2602 if (target_executing
)
2605 signal (SIGINT
, handle_remote_sigint
);
2609 /* Reinstall the usual SIGINT handlers, after the target has
2612 cleanup_sigint_signal_handler (void *dummy
)
2614 signal (SIGINT
, handle_sigint
);
2615 if (sigint_remote_twice_token
)
2616 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_twice_token
);
2617 if (sigint_remote_token
)
2618 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_token
);
2621 /* Send ^C to target to halt it. Target will respond, and send us a
2623 static void (*ofunc
) (int);
2625 /* The command line interface's stop routine. This function is installed
2626 as a signal handler for SIGINT. The first time a user requests a
2627 stop, we call remote_stop to send a break or ^C. If there is no
2628 response from the target (it didn't stop when the user requested it),
2629 we ask the user if he'd like to detach from the target. */
2631 remote_interrupt (int signo
)
2633 /* If this doesn't work, try more severe steps. */
2634 signal (signo
, remote_interrupt_twice
);
2637 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2642 /* The user typed ^C twice. */
2645 remote_interrupt_twice (int signo
)
2647 signal (signo
, ofunc
);
2649 signal (signo
, remote_interrupt
);
2652 /* This is the generic stop called via the target vector. When a target
2653 interrupt is requested, either by the command line or the GUI, we
2654 will eventually end up here. */
2658 /* Send a break or a ^C, depending on user preference. */
2660 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2663 SERIAL_SEND_BREAK (remote_desc
);
2665 SERIAL_WRITE (remote_desc
, "\003", 1);
2668 /* Ask the user what to do when an interrupt is received. */
2671 interrupt_query (void)
2673 target_terminal_ours ();
2675 if (query ("Interrupted while waiting for the program.\n\
2676 Give up (and stop debugging it)? "))
2678 target_mourn_inferior ();
2679 return_to_top_level (RETURN_QUIT
);
2682 target_terminal_inferior ();
2685 /* Enable/disable target terminal ownership. Most targets can use
2686 terminal groups to control terminal ownership. Remote targets are
2687 different in that explicit transfer of ownership to/from GDB/target
2691 remote_async_terminal_inferior (void)
2693 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2694 sync_execution here. This function should only be called when
2695 GDB is resuming the inferior in the forground. A background
2696 resume (``run&'') should leave GDB in control of the terminal and
2697 consequently should not call this code. */
2698 if (!sync_execution
)
2700 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2701 calls target_terminal_*() idenpotent. The event-loop GDB talking
2702 to an asynchronous target with a synchronous command calls this
2703 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2704 stops trying to transfer the terminal to the target when it
2705 shouldn't this guard can go away. */
2706 if (!remote_async_terminal_ours_p
)
2708 delete_file_handler (input_fd
);
2709 remote_async_terminal_ours_p
= 0;
2710 initialize_sigint_signal_handler ();
2711 /* NOTE: At this point we could also register our selves as the
2712 recipient of all input. Any characters typed could then be
2713 passed on down to the target. */
2717 remote_async_terminal_ours (void)
2719 /* See FIXME in remote_async_terminal_inferior. */
2720 if (!sync_execution
)
2722 /* See FIXME in remote_async_terminal_inferior. */
2723 if (remote_async_terminal_ours_p
)
2725 cleanup_sigint_signal_handler (NULL
);
2726 add_file_handler (input_fd
, stdin_event_handler
, 0);
2727 remote_async_terminal_ours_p
= 1;
2730 /* If nonzero, ignore the next kill. */
2735 remote_console_output (char *msg
)
2739 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
2742 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
2745 fputs_unfiltered (tb
, gdb_stdtarg
);
2747 gdb_flush (gdb_stdtarg
);
2750 /* Wait until the remote machine stops, then return,
2751 storing status in STATUS just as `wait' would.
2752 Returns "pid", which in the case of a multi-threaded
2753 remote OS, is the thread-id. */
2756 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2758 unsigned char *buf
= alloca (PBUFSIZ
);
2759 int thread_num
= -1;
2761 status
->kind
= TARGET_WAITKIND_EXITED
;
2762 status
->value
.integer
= 0;
2768 ofunc
= signal (SIGINT
, remote_interrupt
);
2769 getpkt (buf
, PBUFSIZ
, 1);
2770 signal (SIGINT
, ofunc
);
2772 /* This is a hook for when we need to do something (perhaps the
2773 collection of trace data) every time the target stops. */
2774 if (target_wait_loop_hook
)
2775 (*target_wait_loop_hook
) ();
2779 case 'E': /* Error of some sort */
2780 warning ("Remote failure reply: %s", buf
);
2782 case 'T': /* Status with PC, SP, FP, ... */
2786 char* regs
= (char*) alloca (MAX_REGISTER_RAW_SIZE
);
2788 /* Expedited reply, containing Signal, {regno, reg} repeat */
2789 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2791 n... = register number
2792 r... = register contents
2794 p
= &buf
[3]; /* after Txx */
2801 /* Read the register number */
2802 regno
= strtol ((const char *) p
, &p_temp
, 16);
2803 p1
= (unsigned char *) p_temp
;
2805 if (p1
== p
) /* No register number present here */
2807 p1
= (unsigned char *) strchr ((const char *) p
, ':');
2809 warning ("Malformed packet(a) (missing colon): %s\n\
2812 if (strncmp ((const char *) p
, "thread", p1
- p
) == 0)
2814 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2815 record_currthread (thread_num
);
2816 p
= (unsigned char *) p_temp
;
2824 warning ("Malformed packet(b) (missing colon): %s\n\
2828 if (regno
>= NUM_REGS
)
2829 warning ("Remote sent bad register number %ld: %s\n\
2833 for (i
= 0; i
< REGISTER_RAW_SIZE (regno
); i
++)
2835 if (p
[0] == 0 || p
[1] == 0)
2836 warning ("Remote reply is too short: %s", buf
);
2837 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
2840 supply_register (regno
, regs
);
2845 warning ("Remote register badly formatted: %s", buf
);
2846 warning (" here: %s", p
);
2851 case 'S': /* Old style status, just signal only */
2852 status
->kind
= TARGET_WAITKIND_STOPPED
;
2853 status
->value
.sig
= (enum target_signal
)
2854 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2858 /* Export Cisco kernel mode as a convenience variable
2859 (so that it can be used in the GDB prompt if desired). */
2861 if (cisco_kernel_mode
== 1)
2862 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2863 value_from_string ("PDEBUG-"));
2864 cisco_kernel_mode
= 0;
2865 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2866 record_currthread (thread_num
);
2868 else if (buf
[3] == 'k')
2870 /* Export Cisco kernel mode as a convenience variable
2871 (so that it can be used in the GDB prompt if desired). */
2873 if (cisco_kernel_mode
== 1)
2874 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2875 value_from_string ("KDEBUG-"));
2876 cisco_kernel_mode
= 1;
2879 case 'N': /* Cisco special: status and offsets */
2881 bfd_vma text_addr
, data_addr
, bss_addr
;
2882 bfd_signed_vma text_off
, data_off
, bss_off
;
2885 status
->kind
= TARGET_WAITKIND_STOPPED
;
2886 status
->value
.sig
= (enum target_signal
)
2887 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2889 if (symfile_objfile
== NULL
)
2891 warning ("Relocation packet received with no symbol file. \
2896 /* Relocate object file. Buffer format is NAATT;DD;BB
2897 * where AA is the signal number, TT is the new text
2898 * address, DD * is the new data address, and BB is the
2899 * new bss address. */
2902 text_addr
= strtoul (p
, (char **) &p1
, 16);
2903 if (p1
== p
|| *p1
!= ';')
2904 warning ("Malformed relocation packet: Packet '%s'", buf
);
2906 data_addr
= strtoul (p
, (char **) &p1
, 16);
2907 if (p1
== p
|| *p1
!= ';')
2908 warning ("Malformed relocation packet: Packet '%s'", buf
);
2910 bss_addr
= strtoul (p
, (char **) &p1
, 16);
2912 warning ("Malformed relocation packet: Packet '%s'", buf
);
2914 if (remote_cisco_section_offsets (text_addr
, data_addr
, bss_addr
,
2915 &text_off
, &data_off
, &bss_off
)
2917 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
2918 remote_cisco_objfile_relocate (text_off
, data_off
, bss_off
);
2922 case 'W': /* Target exited */
2924 /* The remote process exited. */
2925 status
->kind
= TARGET_WAITKIND_EXITED
;
2926 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
2930 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
2931 status
->value
.sig
= (enum target_signal
)
2932 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2936 case 'O': /* Console output */
2937 remote_console_output (buf
+ 1);
2940 if (last_sent_signal
!= TARGET_SIGNAL_0
)
2942 /* Zero length reply means that we tried 'S' or 'C' and
2943 the remote system doesn't support it. */
2944 target_terminal_ours_for_output ();
2946 ("Can't send signals to this remote system. %s not sent.\n",
2947 target_signal_to_name (last_sent_signal
));
2948 last_sent_signal
= TARGET_SIGNAL_0
;
2949 target_terminal_inferior ();
2951 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
2952 putpkt ((char *) buf
);
2955 /* else fallthrough */
2957 warning ("Invalid remote reply: %s", buf
);
2962 if (thread_num
!= -1)
2964 return pid_to_ptid (thread_num
);
2966 return inferior_ptid
;
2969 /* Async version of remote_wait. */
2971 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2973 unsigned char *buf
= alloca (PBUFSIZ
);
2974 int thread_num
= -1;
2976 status
->kind
= TARGET_WAITKIND_EXITED
;
2977 status
->value
.integer
= 0;
2983 if (!target_is_async_p ())
2984 ofunc
= signal (SIGINT
, remote_interrupt
);
2985 /* FIXME: cagney/1999-09-27: If we're in async mode we should
2986 _never_ wait for ever -> test on target_is_async_p().
2987 However, before we do that we need to ensure that the caller
2988 knows how to take the target into/out of async mode. */
2989 getpkt (buf
, PBUFSIZ
, wait_forever_enabled_p
);
2990 if (!target_is_async_p ())
2991 signal (SIGINT
, ofunc
);
2993 /* This is a hook for when we need to do something (perhaps the
2994 collection of trace data) every time the target stops. */
2995 if (target_wait_loop_hook
)
2996 (*target_wait_loop_hook
) ();
3000 case 'E': /* Error of some sort */
3001 warning ("Remote failure reply: %s", buf
);
3003 case 'T': /* Status with PC, SP, FP, ... */
3007 char* regs
= (char*) alloca (MAX_REGISTER_RAW_SIZE
);
3009 /* Expedited reply, containing Signal, {regno, reg} repeat */
3010 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3012 n... = register number
3013 r... = register contents
3015 p
= &buf
[3]; /* after Txx */
3022 /* Read the register number */
3023 regno
= strtol ((const char *) p
, &p_temp
, 16);
3024 p1
= (unsigned char *) p_temp
;
3026 if (p1
== p
) /* No register number present here */
3028 p1
= (unsigned char *) strchr ((const char *) p
, ':');
3030 warning ("Malformed packet(a) (missing colon): %s\n\
3033 if (strncmp ((const char *) p
, "thread", p1
- p
) == 0)
3035 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3036 record_currthread (thread_num
);
3037 p
= (unsigned char *) p_temp
;
3045 warning ("Malformed packet(b) (missing colon): %s\n\
3049 if (regno
>= NUM_REGS
)
3050 warning ("Remote sent bad register number %ld: %s\n\
3054 for (i
= 0; i
< REGISTER_RAW_SIZE (regno
); i
++)
3056 if (p
[0] == 0 || p
[1] == 0)
3057 warning ("Remote reply is too short: %s", buf
);
3058 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3061 supply_register (regno
, regs
);
3066 warning ("Remote register badly formatted: %s", buf
);
3067 warning (" here: %s", p
);
3072 case 'S': /* Old style status, just signal only */
3073 status
->kind
= TARGET_WAITKIND_STOPPED
;
3074 status
->value
.sig
= (enum target_signal
)
3075 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3079 /* Export Cisco kernel mode as a convenience variable
3080 (so that it can be used in the GDB prompt if desired). */
3082 if (cisco_kernel_mode
== 1)
3083 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3084 value_from_string ("PDEBUG-"));
3085 cisco_kernel_mode
= 0;
3086 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3087 record_currthread (thread_num
);
3089 else if (buf
[3] == 'k')
3091 /* Export Cisco kernel mode as a convenience variable
3092 (so that it can be used in the GDB prompt if desired). */
3094 if (cisco_kernel_mode
== 1)
3095 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3096 value_from_string ("KDEBUG-"));
3097 cisco_kernel_mode
= 1;
3100 case 'N': /* Cisco special: status and offsets */
3102 bfd_vma text_addr
, data_addr
, bss_addr
;
3103 bfd_signed_vma text_off
, data_off
, bss_off
;
3106 status
->kind
= TARGET_WAITKIND_STOPPED
;
3107 status
->value
.sig
= (enum target_signal
)
3108 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3110 if (symfile_objfile
== NULL
)
3112 warning ("Relocation packet recieved with no symbol file. \
3117 /* Relocate object file. Buffer format is NAATT;DD;BB
3118 * where AA is the signal number, TT is the new text
3119 * address, DD * is the new data address, and BB is the
3120 * new bss address. */
3123 text_addr
= strtoul (p
, (char **) &p1
, 16);
3124 if (p1
== p
|| *p1
!= ';')
3125 warning ("Malformed relocation packet: Packet '%s'", buf
);
3127 data_addr
= strtoul (p
, (char **) &p1
, 16);
3128 if (p1
== p
|| *p1
!= ';')
3129 warning ("Malformed relocation packet: Packet '%s'", buf
);
3131 bss_addr
= strtoul (p
, (char **) &p1
, 16);
3133 warning ("Malformed relocation packet: Packet '%s'", buf
);
3135 if (remote_cisco_section_offsets (text_addr
, data_addr
, bss_addr
,
3136 &text_off
, &data_off
, &bss_off
)
3138 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
3139 remote_cisco_objfile_relocate (text_off
, data_off
, bss_off
);
3143 case 'W': /* Target exited */
3145 /* The remote process exited. */
3146 status
->kind
= TARGET_WAITKIND_EXITED
;
3147 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3151 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3152 status
->value
.sig
= (enum target_signal
)
3153 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3157 case 'O': /* Console output */
3158 remote_console_output (buf
+ 1);
3159 /* Return immediately to the event loop. The event loop will
3160 still be waiting on the inferior afterwards. */
3161 status
->kind
= TARGET_WAITKIND_IGNORE
;
3164 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3166 /* Zero length reply means that we tried 'S' or 'C' and
3167 the remote system doesn't support it. */
3168 target_terminal_ours_for_output ();
3170 ("Can't send signals to this remote system. %s not sent.\n",
3171 target_signal_to_name (last_sent_signal
));
3172 last_sent_signal
= TARGET_SIGNAL_0
;
3173 target_terminal_inferior ();
3175 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3176 putpkt ((char *) buf
);
3179 /* else fallthrough */
3181 warning ("Invalid remote reply: %s", buf
);
3186 if (thread_num
!= -1)
3188 return pid_to_ptid (thread_num
);
3190 return inferior_ptid
;
3193 /* Number of bytes of registers this stub implements. */
3195 static int register_bytes_found
;
3197 /* Read the remote registers into the block REGS. */
3198 /* Currently we just read all the registers, so we don't use regno. */
3202 remote_fetch_registers (int regno
)
3204 char *buf
= alloca (PBUFSIZ
);
3207 char *regs
= alloca (REGISTER_BYTES
);
3209 set_thread (PIDGET (inferior_ptid
), 1);
3212 remote_send (buf
, PBUFSIZ
);
3214 /* Save the size of the packet sent to us by the target. Its used
3215 as a heuristic when determining the max size of packets that the
3216 target can safely receive. */
3217 if (actual_register_packet_size
== 0)
3218 actual_register_packet_size
= strlen (buf
);
3220 /* Unimplemented registers read as all bits zero. */
3221 memset (regs
, 0, REGISTER_BYTES
);
3223 /* We can get out of synch in various cases. If the first character
3224 in the buffer is not a hex character, assume that has happened
3225 and try to fetch another packet to read. */
3226 while ((buf
[0] < '0' || buf
[0] > '9')
3227 && (buf
[0] < 'a' || buf
[0] > 'f')
3228 && buf
[0] != 'x') /* New: unavailable register value */
3231 fprintf_unfiltered (gdb_stdlog
,
3232 "Bad register packet; fetching a new packet\n");
3233 getpkt (buf
, PBUFSIZ
, 0);
3236 /* Reply describes registers byte by byte, each byte encoded as two
3237 hex characters. Suck them all up, then supply them to the
3238 register cacheing/storage mechanism. */
3241 for (i
= 0; i
< REGISTER_BYTES
; i
++)
3247 warning ("Remote reply is of odd length: %s", buf
);
3248 /* Don't change register_bytes_found in this case, and don't
3249 print a second warning. */
3252 if (p
[0] == 'x' && p
[1] == 'x')
3253 regs
[i
] = 0; /* 'x' */
3255 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3259 if (i
!= register_bytes_found
)
3261 register_bytes_found
= i
;
3262 if (REGISTER_BYTES_OK_P ()
3263 && !REGISTER_BYTES_OK (i
))
3264 warning ("Remote reply is too short: %s", buf
);
3268 for (i
= 0; i
< NUM_REGS
; i
++)
3270 supply_register (i
, ®s
[REGISTER_BYTE (i
)]);
3271 if (buf
[REGISTER_BYTE (i
) * 2] == 'x')
3272 set_register_cached (i
, -1);
3276 /* Prepare to store registers. Since we may send them all (using a
3277 'G' request), we have to read out the ones we don't want to change
3281 remote_prepare_to_store (void)
3283 /* Make sure the entire registers array is valid. */
3284 switch (remote_protocol_P
.support
)
3286 case PACKET_DISABLE
:
3287 case PACKET_SUPPORT_UNKNOWN
:
3288 read_register_bytes (0, (char *) NULL
, REGISTER_BYTES
);
3295 /* Helper: Attempt to store REGNO using the P packet. Return fail IFF
3296 packet was not recognized. */
3299 store_register_using_P (int regno
)
3301 /* Try storing a single register. */
3302 char *buf
= alloca (PBUFSIZ
);
3307 sprintf (buf
, "P%x=", regno
);
3308 p
= buf
+ strlen (buf
);
3309 regp
= register_buffer (regno
);
3310 for (i
= 0; i
< REGISTER_RAW_SIZE (regno
); ++i
)
3312 *p
++ = tohex ((regp
[i
] >> 4) & 0xf);
3313 *p
++ = tohex (regp
[i
] & 0xf);
3316 remote_send (buf
, PBUFSIZ
);
3318 return buf
[0] != '\0';
3322 /* Store register REGNO, or all registers if REGNO == -1, from the contents
3323 of the register cache buffer. FIXME: ignores errors. */
3326 remote_store_registers (int regno
)
3328 char *buf
= alloca (PBUFSIZ
);
3333 set_thread (PIDGET (inferior_ptid
), 1);
3337 switch (remote_protocol_P
.support
)
3339 case PACKET_DISABLE
:
3342 if (store_register_using_P (regno
))
3345 error ("Protocol error: P packet not recognized by stub");
3346 case PACKET_SUPPORT_UNKNOWN
:
3347 if (store_register_using_P (regno
))
3349 /* The stub recognized the 'P' packet. Remember this. */
3350 remote_protocol_P
.support
= PACKET_ENABLE
;
3355 /* The stub does not support the 'P' packet. Use 'G'
3356 instead, and don't try using 'P' in the future (it
3357 will just waste our time). */
3358 remote_protocol_P
.support
= PACKET_DISABLE
;
3366 /* Command describes registers byte by byte,
3367 each byte encoded as two hex characters. */
3369 regs
= register_buffer (-1);
3371 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3372 for (i
= 0; i
< register_bytes_found
; i
++)
3374 *p
++ = tohex ((regs
[i
] >> 4) & 0xf);
3375 *p
++ = tohex (regs
[i
] & 0xf);
3379 remote_send (buf
, PBUFSIZ
);
3383 /* Return the number of hex digits in num. */
3386 hexnumlen (ULONGEST num
)
3390 for (i
= 0; num
!= 0; i
++)
3396 /* Set BUF to the minimum number of hex digits representing NUM. */
3399 hexnumstr (char *buf
, ULONGEST num
)
3401 int len
= hexnumlen (num
);
3402 return hexnumnstr (buf
, num
, len
);
3406 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3409 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3415 for (i
= width
- 1; i
>= 0; i
--)
3417 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3424 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3427 remote_address_masked (CORE_ADDR addr
)
3429 if (remote_address_size
> 0
3430 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3432 /* Only create a mask when that mask can safely be constructed
3433 in a ULONGEST variable. */
3435 mask
= (mask
<< remote_address_size
) - 1;
3441 /* Determine whether the remote target supports binary downloading.
3442 This is accomplished by sending a no-op memory write of zero length
3443 to the target at the specified address. It does not suffice to send
3444 the whole packet, since many stubs strip the eighth bit and subsequently
3445 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3447 NOTE: This can still lose if the serial line is not eight-bit
3448 clean. In cases like this, the user should clear "remote
3452 check_binary_download (CORE_ADDR addr
)
3454 switch (remote_protocol_binary_download
.support
)
3456 case PACKET_DISABLE
:
3460 case PACKET_SUPPORT_UNKNOWN
:
3462 char *buf
= alloca (PBUFSIZ
);
3467 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3469 p
+= hexnumstr (p
, (ULONGEST
) 0);
3473 putpkt_binary (buf
, (int) (p
- buf
));
3474 getpkt (buf
, PBUFSIZ
, 0);
3479 fprintf_unfiltered (gdb_stdlog
,
3480 "binary downloading NOT suppported by target\n");
3481 remote_protocol_binary_download
.support
= PACKET_DISABLE
;
3486 fprintf_unfiltered (gdb_stdlog
,
3487 "binary downloading suppported by target\n");
3488 remote_protocol_binary_download
.support
= PACKET_ENABLE
;
3495 /* Write memory data directly to the remote machine.
3496 This does not inform the data cache; the data cache uses this.
3497 MEMADDR is the address in the remote memory space.
3498 MYADDR is the address of the buffer in our space.
3499 LEN is the number of bytes.
3501 Returns number of bytes transferred, or 0 (setting errno) for
3502 error. Only transfer a single packet. */
3505 remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3508 int max_buf_size
; /* Max size of packet output buffer */
3510 unsigned char *plen
;
3516 /* Verify that the target can support a binary download */
3517 check_binary_download (memaddr
);
3519 /* Determine the max packet size. */
3520 max_buf_size
= get_memory_write_packet_size ();
3521 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3522 buf
= alloca (sizeof_buf
);
3524 /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */
3525 max_buf_size
-= 2 + hexnumlen (memaddr
+ len
- 1) + 1 + hexnumlen (len
) + 4;
3527 /* construct "M"<memaddr>","<len>":" */
3528 /* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */
3531 /* Append [XM]. Compute a best guess of the number of bytes
3532 actually transfered. */
3533 switch (remote_protocol_binary_download
.support
)
3537 /* Best guess at number of bytes that will fit. */
3538 todo
= min (len
, max_buf_size
);
3540 case PACKET_DISABLE
:
3542 /* num bytes that will fit */
3543 todo
= min (len
, max_buf_size
/ 2);
3545 case PACKET_SUPPORT_UNKNOWN
:
3546 internal_error (__FILE__
, __LINE__
,
3547 "remote_write_bytes: bad internal state");
3549 internal_error (__FILE__
, __LINE__
, "bad switch");
3552 /* Append <memaddr> */
3553 memaddr
= remote_address_masked (memaddr
);
3554 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3557 /* Append <len>. Retain the location/size of <len>. It may
3558 need to be adjusted once the packet body has been created. */
3560 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
3565 /* Append the packet body. */
3566 switch (remote_protocol_binary_download
.support
)
3569 /* Binary mode. Send target system values byte by byte, in
3570 increasing byte addresses. Only escape certain critical
3573 (nr_bytes
< todo
) && (p
- buf
) < (max_buf_size
- 2);
3576 switch (myaddr
[nr_bytes
] & 0xff)
3581 /* These must be escaped */
3583 *p
++ = (myaddr
[nr_bytes
] & 0xff) ^ 0x20;
3586 *p
++ = myaddr
[nr_bytes
] & 0xff;
3590 if (nr_bytes
< todo
)
3592 /* Escape chars have filled up the buffer prematurely,
3593 and we have actually sent fewer bytes than planned.
3594 Fix-up the length field of the packet. Use the same
3595 number of characters as before. */
3597 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
3598 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
3601 case PACKET_DISABLE
:
3602 /* Normal mode: Send target system values byte by byte, in
3603 increasing byte addresses. Each byte is encoded as a two hex
3605 for (nr_bytes
= 0; nr_bytes
< todo
; nr_bytes
++)
3607 *p
++ = tohex ((myaddr
[nr_bytes
] >> 4) & 0xf);
3608 *p
++ = tohex (myaddr
[nr_bytes
] & 0xf);
3612 case PACKET_SUPPORT_UNKNOWN
:
3613 internal_error (__FILE__
, __LINE__
,
3614 "remote_write_bytes: bad internal state");
3616 internal_error (__FILE__
, __LINE__
, "bad switch");
3619 putpkt_binary (buf
, (int) (p
- buf
));
3620 getpkt (buf
, sizeof_buf
, 0);
3624 /* There is no correspondance between what the remote protocol
3625 uses for errors and errno codes. We would like a cleaner way
3626 of representing errors (big enough to include errno codes,
3627 bfd_error codes, and others). But for now just return EIO. */
3632 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3633 bytes than we'd planned. */
3637 /* Read memory data directly from the remote machine.
3638 This does not use the data cache; the data cache uses this.
3639 MEMADDR is the address in the remote memory space.
3640 MYADDR is the address of the buffer in our space.
3641 LEN is the number of bytes.
3643 Returns number of bytes transferred, or 0 for error. */
3645 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3646 remote targets) shouldn't attempt to read the entire buffer.
3647 Instead it should read a single packet worth of data and then
3648 return the byte size of that packet to the caller. The caller (its
3649 caller and its callers caller ;-) already contains code for
3650 handling partial reads. */
3653 remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3656 int max_buf_size
; /* Max size of packet output buffer */
3660 /* Create a buffer big enough for this packet. */
3661 max_buf_size
= get_memory_read_packet_size ();
3662 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3663 buf
= alloca (sizeof_buf
);
3672 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
3674 /* construct "m"<memaddr>","<len>" */
3675 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3676 memaddr
= remote_address_masked (memaddr
);
3679 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3681 p
+= hexnumstr (p
, (ULONGEST
) todo
);
3685 getpkt (buf
, sizeof_buf
, 0);
3689 /* There is no correspondance between what the remote protocol uses
3690 for errors and errno codes. We would like a cleaner way of
3691 representing errors (big enough to include errno codes, bfd_error
3692 codes, and others). But for now just return EIO. */
3697 /* Reply describes memory byte by byte,
3698 each byte encoded as two hex characters. */
3701 for (i
= 0; i
< todo
; i
++)
3703 if (p
[0] == 0 || p
[1] == 0)
3704 /* Reply is short. This means that we were able to read
3705 only part of what we wanted to. */
3706 return i
+ (origlen
- len
);
3707 myaddr
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3717 /* Read or write LEN bytes from inferior memory at MEMADDR,
3718 transferring to or from debugger address BUFFER. Write to inferior if
3719 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3720 for error. TARGET is unused. */
3724 remote_xfer_memory (CORE_ADDR mem_addr
, char *buffer
, int mem_len
,
3726 struct mem_attrib
*attrib ATTRIBUTE_UNUSED
,
3727 struct target_ops
*target
)
3729 CORE_ADDR targ_addr
;
3733 REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr
, mem_len
, &targ_addr
, &targ_len
);
3738 res
= remote_write_bytes (targ_addr
, buffer
, targ_len
);
3740 res
= remote_read_bytes (targ_addr
, buffer
, targ_len
);
3747 /* Enable after 4.12. */
3750 remote_search (int len
, char *data
, char *mask
, CORE_ADDR startaddr
,
3751 int increment
, CORE_ADDR lorange
, CORE_ADDR hirange
,
3752 CORE_ADDR
*addr_found
, char *data_found
)
3754 if (increment
== -4 && len
== 4)
3756 long mask_long
, data_long
;
3757 long data_found_long
;
3758 CORE_ADDR addr_we_found
;
3759 char *buf
= alloca (PBUFSIZ
);
3760 long returned_long
[2];
3763 mask_long
= extract_unsigned_integer (mask
, len
);
3764 data_long
= extract_unsigned_integer (data
, len
);
3765 sprintf (buf
, "t%x:%x,%x", startaddr
, data_long
, mask_long
);
3767 getpkt (buf
, PBUFSIZ
, 0);
3770 /* The stub doesn't support the 't' request. We might want to
3771 remember this fact, but on the other hand the stub could be
3772 switched on us. Maybe we should remember it only until
3773 the next "target remote". */
3774 generic_search (len
, data
, mask
, startaddr
, increment
, lorange
,
3775 hirange
, addr_found
, data_found
);
3780 /* There is no correspondance between what the remote protocol uses
3781 for errors and errno codes. We would like a cleaner way of
3782 representing errors (big enough to include errno codes, bfd_error
3783 codes, and others). But for now just use EIO. */
3784 memory_error (EIO
, startaddr
);
3787 while (*p
!= '\0' && *p
!= ',')
3788 addr_we_found
= (addr_we_found
<< 4) + fromhex (*p
++);
3790 error ("Protocol error: short return for search");
3792 data_found_long
= 0;
3793 while (*p
!= '\0' && *p
!= ',')
3794 data_found_long
= (data_found_long
<< 4) + fromhex (*p
++);
3795 /* Ignore anything after this comma, for future extensions. */
3797 if (addr_we_found
< lorange
|| addr_we_found
>= hirange
)
3803 *addr_found
= addr_we_found
;
3804 *data_found
= store_unsigned_integer (data_we_found
, len
);
3807 generic_search (len
, data
, mask
, startaddr
, increment
, lorange
,
3808 hirange
, addr_found
, data_found
);
3813 remote_files_info (struct target_ops
*ignore
)
3815 puts_filtered ("Debugging a target over a serial line.\n");
3818 /* Stuff for dealing with the packets which are part of this protocol.
3819 See comment at top of file for details. */
3821 /* Read a single character from the remote end, masking it down to 7 bits. */
3824 readchar (int timeout
)
3828 ch
= SERIAL_READCHAR (remote_desc
, timeout
);
3833 switch ((enum serial_rc
) ch
)
3836 target_mourn_inferior ();
3837 error ("Remote connection closed");
3840 perror_with_name ("Remote communication error");
3842 case SERIAL_TIMEOUT
:
3848 /* Send the command in BUF to the remote machine, and read the reply
3849 into BUF. Report an error if we get an error reply. */
3852 remote_send (char *buf
,
3856 getpkt (buf
, sizeof_buf
, 0);
3859 error ("Remote failure reply: %s", buf
);
3862 /* Display a null-terminated packet on stdout, for debugging, using C
3866 print_packet (char *buf
)
3868 puts_filtered ("\"");
3869 fputstr_filtered (buf
, '"', gdb_stdout
);
3870 puts_filtered ("\"");
3876 return putpkt_binary (buf
, strlen (buf
));
3879 /* Send a packet to the remote machine, with error checking. The data
3880 of the packet is in BUF. The string in BUF can be at most PBUFSIZ - 5
3881 to account for the $, # and checksum, and for a possible /0 if we are
3882 debugging (remote_debug) and want to print the sent packet as a string */
3885 putpkt_binary (char *buf
, int cnt
)
3888 unsigned char csum
= 0;
3889 char *buf2
= alloca (cnt
+ 6);
3890 long sizeof_junkbuf
= PBUFSIZ
;
3891 char *junkbuf
= alloca (sizeof_junkbuf
);
3897 /* Copy the packet into buffer BUF2, encapsulating it
3898 and giving it a checksum. */
3903 for (i
= 0; i
< cnt
; i
++)
3909 *p
++ = tohex ((csum
>> 4) & 0xf);
3910 *p
++ = tohex (csum
& 0xf);
3912 /* Send it over and over until we get a positive ack. */
3916 int started_error_output
= 0;
3921 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
3922 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
3923 fprintf_unfiltered (gdb_stdlog
, "...");
3924 gdb_flush (gdb_stdlog
);
3926 if (SERIAL_WRITE (remote_desc
, buf2
, p
- buf2
))
3927 perror_with_name ("putpkt: write failed");
3929 /* read until either a timeout occurs (-2) or '+' is read */
3932 ch
= readchar (remote_timeout
);
3940 case SERIAL_TIMEOUT
:
3942 if (started_error_output
)
3944 putchar_unfiltered ('\n');
3945 started_error_output
= 0;
3954 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
3958 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
3959 case SERIAL_TIMEOUT
:
3963 break; /* Retransmit buffer */
3967 fprintf_unfiltered (gdb_stdlog
, "Packet instead of Ack, ignoring it\n");
3968 /* It's probably an old response, and we're out of sync.
3969 Just gobble up the packet and ignore it. */
3970 read_frame (junkbuf
, sizeof_junkbuf
);
3971 continue; /* Now, go look for + */
3976 if (!started_error_output
)
3978 started_error_output
= 1;
3979 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
3981 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
3985 break; /* Here to retransmit */
3989 /* This is wrong. If doing a long backtrace, the user should be
3990 able to get out next time we call QUIT, without anything as
3991 violent as interrupt_query. If we want to provide a way out of
3992 here without getting to the next QUIT, it should be based on
3993 hitting ^C twice as in remote_wait. */
4003 static int remote_cisco_mode
;
4005 /* Come here after finding the start of the frame. Collect the rest
4006 into BUF, verifying the checksum, length, and handling run-length
4007 compression. No more than sizeof_buf-1 characters are read so that
4008 the buffer can be NUL terminated.
4010 Returns -1 on error, number of characters in buffer (ignoring the
4011 trailing NULL) on success. (could be extended to return one of the
4012 SERIAL status indications). */
4015 read_frame (char *buf
,
4027 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
4028 c
= readchar (remote_timeout
);
4031 case SERIAL_TIMEOUT
:
4033 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4037 fputs_filtered ("Saw new packet start in middle of old one\n",
4039 return -1; /* Start a new packet, count retries */
4042 unsigned char pktcsum
;
4048 check_0
= readchar (remote_timeout
);
4050 check_1
= readchar (remote_timeout
);
4052 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4055 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog
);
4058 else if (check_0
< 0 || check_1
< 0)
4061 fputs_filtered ("Communication error in checksum\n", gdb_stdlog
);
4065 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4066 if (csum
== pktcsum
)
4071 fprintf_filtered (gdb_stdlog
,
4072 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4074 fputs_filtered (buf
, gdb_stdlog
);
4075 fputs_filtered ("\n", gdb_stdlog
);
4077 /* Number of characters in buffer ignoring trailing
4081 case '*': /* Run length encoding */
4086 if (remote_cisco_mode
== 0)
4088 c
= readchar (remote_timeout
);
4090 repeat
= c
- ' ' + 3; /* Compute repeat count */
4094 /* Cisco's run-length encoding variant uses two
4095 hex chars to represent the repeat count. */
4097 c
= readchar (remote_timeout
);
4099 repeat
= fromhex (c
) << 4;
4100 c
= readchar (remote_timeout
);
4102 repeat
+= fromhex (c
);
4105 /* The character before ``*'' is repeated. */
4107 if (repeat
> 0 && repeat
<= 255
4109 && bc
+ repeat
< sizeof_buf
- 1)
4111 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4117 printf_filtered ("Repeat count %d too large for buffer: ", repeat
);
4118 puts_filtered (buf
);
4119 puts_filtered ("\n");
4123 if (bc
< sizeof_buf
- 1)
4131 puts_filtered ("Remote packet too long: ");
4132 puts_filtered (buf
);
4133 puts_filtered ("\n");
4140 /* Read a packet from the remote machine, with error checking, and
4141 store it in BUF. If FOREVER, wait forever rather than timing out;
4142 this is used (in synchronous mode) to wait for a target that is is
4143 executing user code to stop. */
4144 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4145 don't have to change all the calls to getpkt to deal with the
4146 return value, because at the moment I don't know what the right
4147 thing to do it for those. */
4155 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4159 /* Read a packet from the remote machine, with error checking, and
4160 store it in BUF. If FOREVER, wait forever rather than timing out;
4161 this is used (in synchronous mode) to wait for a target that is is
4162 executing user code to stop. If FOREVER == 0, this function is
4163 allowed to time out gracefully and return an indication of this to
4166 getpkt_sane (char *buf
,
4175 strcpy (buf
, "timeout");
4179 timeout
= watchdog
> 0 ? watchdog
: -1;
4183 timeout
= remote_timeout
;
4187 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4189 /* This can loop forever if the remote side sends us characters
4190 continuously, but if it pauses, we'll get a zero from readchar
4191 because of timeout. Then we'll count that as a retry. */
4193 /* Note that we will only wait forever prior to the start of a packet.
4194 After that, we expect characters to arrive at a brisk pace. They
4195 should show up within remote_timeout intervals. */
4199 c
= readchar (timeout
);
4201 if (c
== SERIAL_TIMEOUT
)
4203 if (forever
) /* Watchdog went off? Kill the target. */
4206 target_mourn_inferior ();
4207 error ("Watchdog has expired. Target detached.\n");
4210 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4216 /* We've found the start of a packet, now collect the data. */
4218 val
= read_frame (buf
, sizeof_buf
);
4224 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4225 fputstr_unfiltered (buf
, 0, gdb_stdlog
);
4226 fprintf_unfiltered (gdb_stdlog
, "\n");
4228 SERIAL_WRITE (remote_desc
, "+", 1);
4232 /* Try the whole thing again. */
4234 SERIAL_WRITE (remote_desc
, "-", 1);
4237 /* We have tried hard enough, and just can't receive the packet. Give up. */
4239 printf_unfiltered ("Ignoring packet error, continuing...\n");
4240 SERIAL_WRITE (remote_desc
, "+", 1);
4247 /* For some mysterious reason, wait_for_inferior calls kill instead of
4248 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4252 target_mourn_inferior ();
4256 /* Use catch_errors so the user can quit from gdb even when we aren't on
4257 speaking terms with the remote system. */
4258 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4260 /* Don't wait for it to die. I'm not really sure it matters whether
4261 we do or not. For the existing stubs, kill is a noop. */
4262 target_mourn_inferior ();
4265 /* Async version of remote_kill. */
4267 remote_async_kill (void)
4269 /* Unregister the file descriptor from the event loop. */
4270 if (target_is_async_p ())
4271 SERIAL_ASYNC (remote_desc
, NULL
, 0);
4273 /* For some mysterious reason, wait_for_inferior calls kill instead of
4274 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4278 target_mourn_inferior ();
4282 /* Use catch_errors so the user can quit from gdb even when we aren't on
4283 speaking terms with the remote system. */
4284 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4286 /* Don't wait for it to die. I'm not really sure it matters whether
4287 we do or not. For the existing stubs, kill is a noop. */
4288 target_mourn_inferior ();
4294 remote_mourn_1 (&remote_ops
);
4298 remote_async_mourn (void)
4300 remote_mourn_1 (&remote_async_ops
);
4304 extended_remote_mourn (void)
4306 /* We do _not_ want to mourn the target like this; this will
4307 remove the extended remote target from the target stack,
4308 and the next time the user says "run" it'll fail.
4310 FIXME: What is the right thing to do here? */
4312 remote_mourn_1 (&extended_remote_ops
);
4316 /* Worker function for remote_mourn. */
4318 remote_mourn_1 (struct target_ops
*target
)
4320 unpush_target (target
);
4321 generic_mourn_inferior ();
4324 /* In the extended protocol we want to be able to do things like
4325 "run" and have them basically work as expected. So we need
4326 a special create_inferior function.
4328 FIXME: One day add support for changing the exec file
4329 we're debugging, arguments and an environment. */
4332 extended_remote_create_inferior (char *exec_file
, char *args
, char **env
)
4334 /* Rip out the breakpoints; we'll reinsert them after restarting
4335 the remote server. */
4336 remove_breakpoints ();
4338 /* Now restart the remote server. */
4339 extended_remote_restart ();
4341 /* Now put the breakpoints back in. This way we're safe if the
4342 restart function works via a unix fork on the remote side. */
4343 insert_breakpoints ();
4345 /* Clean up from the last time we were running. */
4346 clear_proceed_status ();
4348 /* Let the remote process run. */
4349 proceed (-1, TARGET_SIGNAL_0
, 0);
4352 /* Async version of extended_remote_create_inferior. */
4354 extended_remote_async_create_inferior (char *exec_file
, char *args
, char **env
)
4356 /* Rip out the breakpoints; we'll reinsert them after restarting
4357 the remote server. */
4358 remove_breakpoints ();
4360 /* If running asynchronously, register the target file descriptor
4361 with the event loop. */
4362 if (event_loop_p
&& target_can_async_p ())
4363 target_async (inferior_event_handler
, 0);
4365 /* Now restart the remote server. */
4366 extended_remote_restart ();
4368 /* Now put the breakpoints back in. This way we're safe if the
4369 restart function works via a unix fork on the remote side. */
4370 insert_breakpoints ();
4372 /* Clean up from the last time we were running. */
4373 clear_proceed_status ();
4375 /* Let the remote process run. */
4376 proceed (-1, TARGET_SIGNAL_0
, 0);
4380 /* On some machines, e.g. 68k, we may use a different breakpoint instruction
4381 than other targets; in those use REMOTE_BREAKPOINT instead of just
4382 BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
4383 and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call
4384 the standard routines that are in mem-break.c. */
4386 /* FIXME, these ought to be done in a more dynamic fashion. For instance,
4387 the choice of breakpoint instruction affects target program design and
4388 vice versa, and by making it user-tweakable, the special code here
4389 goes away and we need fewer special GDB configurations. */
4391 #if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT)
4392 #define REMOTE_BREAKPOINT
4395 #ifdef REMOTE_BREAKPOINT
4397 /* If the target isn't bi-endian, just pretend it is. */
4398 #if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT)
4399 #define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4400 #define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4403 static unsigned char big_break_insn
[] = BIG_REMOTE_BREAKPOINT
;
4404 static unsigned char little_break_insn
[] = LITTLE_REMOTE_BREAKPOINT
;
4406 #endif /* REMOTE_BREAKPOINT */
4408 /* Insert a breakpoint on targets that don't have any better breakpoint
4409 support. We read the contents of the target location and stash it,
4410 then overwrite it with a breakpoint instruction. ADDR is the target
4411 location in the target machine. CONTENTS_CACHE is a pointer to
4412 memory allocated for saving the target contents. It is guaranteed
4413 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
4414 is accomplished via BREAKPOINT_MAX). */
4417 remote_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4419 #ifdef REMOTE_BREAKPOINT
4424 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4425 If it succeeds, then set the support to PACKET_ENABLE. If it
4426 fails, and the user has explicitly requested the Z support then
4427 report an error, otherwise, mark it disabled and go on. */
4429 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4431 char *buf
= alloca (PBUFSIZ
);
4434 addr
= remote_address_masked (addr
);
4438 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4439 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4440 sprintf (p
, ",%d", bp_size
);
4443 getpkt (buf
, PBUFSIZ
, 0);
4445 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]))
4451 case PACKET_UNKNOWN
:
4456 #ifdef REMOTE_BREAKPOINT
4457 val
= target_read_memory (addr
, contents_cache
, sizeof big_break_insn
);
4461 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
4462 val
= target_write_memory (addr
, (char *) big_break_insn
,
4463 sizeof big_break_insn
);
4465 val
= target_write_memory (addr
, (char *) little_break_insn
,
4466 sizeof little_break_insn
);
4471 return memory_insert_breakpoint (addr
, contents_cache
);
4472 #endif /* REMOTE_BREAKPOINT */
4476 remote_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4480 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4482 char *buf
= alloca (PBUFSIZ
);
4489 addr
= remote_address_masked (addr
);
4490 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4491 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4492 sprintf (p
, ",%d", bp_size
);
4495 getpkt (buf
, PBUFSIZ
, 0);
4497 return (buf
[0] == 'E');
4500 #ifdef REMOTE_BREAKPOINT
4501 return target_write_memory (addr
, contents_cache
, sizeof big_break_insn
);
4503 return memory_remove_breakpoint (addr
, contents_cache
);
4504 #endif /* REMOTE_BREAKPOINT */
4508 watchpoint_to_Z_packet (int type
)
4522 internal_error (__FILE__
, __LINE__
,
4523 "hw_bp_to_z: bad watchpoint type %d", type
);
4527 /* FIXME: This function should be static and a member of the remote
4531 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
4533 char *buf
= alloca (PBUFSIZ
);
4535 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4537 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4538 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4539 remote_protocol_Z
[packet
].name
,
4540 remote_protocol_Z
[packet
].title
);
4542 sprintf (buf
, "Z%x,", packet
);
4543 p
= strchr (buf
, '\0');
4544 addr
= remote_address_masked (addr
);
4545 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4546 sprintf (p
, ",%x", len
);
4549 getpkt (buf
, PBUFSIZ
, 0);
4551 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4554 case PACKET_UNKNOWN
:
4559 internal_error (__FILE__
, __LINE__
,
4560 "remote_insert_watchpoint: reached end of function");
4563 /* FIXME: This function should be static and a member of the remote
4567 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
4569 char *buf
= alloca (PBUFSIZ
);
4571 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4573 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4574 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4575 remote_protocol_Z
[packet
].name
,
4576 remote_protocol_Z
[packet
].title
);
4578 sprintf (buf
, "z%x,", packet
);
4579 p
= strchr (buf
, '\0');
4580 addr
= remote_address_masked (addr
);
4581 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4582 sprintf (p
, ",%x", len
);
4584 getpkt (buf
, PBUFSIZ
, 0);
4586 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4589 case PACKET_UNKNOWN
:
4594 internal_error (__FILE__
, __LINE__
,
4595 "remote_remove_watchpoint: reached end of function");
4598 /* FIXME: This function should be static and a member of the remote
4602 remote_insert_hw_breakpoint (CORE_ADDR addr
, int len
)
4604 char *buf
= alloca (PBUFSIZ
);
4607 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4608 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4609 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4610 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4616 addr
= remote_address_masked (addr
);
4617 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4618 sprintf (p
, ",%x", len
);
4621 getpkt (buf
, PBUFSIZ
, 0);
4623 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4626 case PACKET_UNKNOWN
:
4631 internal_error (__FILE__
, __LINE__
,
4632 "remote_remove_watchpoint: reached end of function");
4635 /* FIXME: This function should be static and a member of the remote
4639 remote_remove_hw_breakpoint (CORE_ADDR addr
, int len
)
4641 char *buf
= alloca (PBUFSIZ
);
4644 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4645 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4646 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4647 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4653 addr
= remote_address_masked (addr
);
4654 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4655 sprintf (p
, ",%x", len
);
4658 getpkt (buf
, PBUFSIZ
, 0);
4660 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4663 case PACKET_UNKNOWN
:
4668 internal_error (__FILE__
, __LINE__
,
4669 "remote_remove_watchpoint: reached end of function");
4672 /* Some targets are only capable of doing downloads, and afterwards
4673 they switch to the remote serial protocol. This function provides
4674 a clean way to get from the download target to the remote target.
4675 It's basically just a wrapper so that we don't have to expose any
4676 of the internal workings of remote.c.
4678 Prior to calling this routine, you should shutdown the current
4679 target code, else you will get the "A program is being debugged
4680 already..." message. Usually a call to pop_target() suffices. */
4683 push_remote_target (char *name
, int from_tty
)
4685 printf_filtered ("Switching to remote protocol\n");
4686 remote_open (name
, from_tty
);
4689 /* Other targets want to use the entire remote serial module but with
4690 certain remote_ops overridden. */
4693 open_remote_target (char *name
, int from_tty
, struct target_ops
*target
,
4696 printf_filtered ("Selecting the %sremote protocol\n",
4697 (extended_p
? "extended-" : ""));
4698 remote_open_1 (name
, from_tty
, target
, extended_p
);
4701 /* Table used by the crc32 function to calcuate the checksum. */
4703 static unsigned long crc32_table
[256] =
4706 static unsigned long
4707 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
4709 if (!crc32_table
[1])
4711 /* Initialize the CRC table and the decoding table. */
4715 for (i
= 0; i
< 256; i
++)
4717 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
4718 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
4725 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
4731 /* compare-sections command
4733 With no arguments, compares each loadable section in the exec bfd
4734 with the same memory range on the target, and reports mismatches.
4735 Useful for verifying the image on the target against the exec file.
4736 Depends on the target understanding the new "qCRC:" request. */
4738 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4739 target method (target verify memory) and generic version of the
4740 actual command. This will allow other high-level code (especially
4741 generic_load()) to make use of this target functionality. */
4744 compare_sections_command (char *args
, int from_tty
)
4747 unsigned long host_crc
, target_crc
;
4748 extern bfd
*exec_bfd
;
4749 struct cleanup
*old_chain
;
4752 const char *sectname
;
4753 char *buf
= alloca (PBUFSIZ
);
4760 error ("command cannot be used without an exec file");
4761 if (!current_target
.to_shortname
||
4762 strcmp (current_target
.to_shortname
, "remote") != 0)
4763 error ("command can only be used with remote target");
4765 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
4767 if (!(s
->flags
& SEC_LOAD
))
4768 continue; /* skip non-loadable section */
4770 size
= bfd_get_section_size_before_reloc (s
);
4772 continue; /* skip zero-length section */
4774 sectname
= bfd_get_section_name (exec_bfd
, s
);
4775 if (args
&& strcmp (args
, sectname
) != 0)
4776 continue; /* not the section selected by user */
4778 matched
= 1; /* do this section */
4780 /* FIXME: assumes lma can fit into long */
4781 sprintf (buf
, "qCRC:%lx,%lx", (long) lma
, (long) size
);
4784 /* be clever; compute the host_crc before waiting for target reply */
4785 sectdata
= xmalloc (size
);
4786 old_chain
= make_cleanup (xfree
, sectdata
);
4787 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
4788 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
4790 getpkt (buf
, PBUFSIZ
, 0);
4792 error ("target memory fault, section %s, range 0x%08x -- 0x%08x",
4793 sectname
, lma
, lma
+ size
);
4795 error ("remote target does not support this operation");
4797 for (target_crc
= 0, tmp
= &buf
[1]; *tmp
; tmp
++)
4798 target_crc
= target_crc
* 16 + fromhex (*tmp
);
4800 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4801 sectname
, paddr (lma
), paddr (lma
+ size
));
4802 if (host_crc
== target_crc
)
4803 printf_filtered ("matched.\n");
4806 printf_filtered ("MIS-MATCHED!\n");
4810 do_cleanups (old_chain
);
4813 warning ("One or more sections of the remote executable does not match\n\
4814 the loaded file\n");
4815 if (args
&& !matched
)
4816 printf_filtered ("No loaded section named '%s'.\n", args
);
4820 remote_query (int query_type
, char *buf
, char *outbuf
, int *bufsiz
)
4823 char *buf2
= alloca (PBUFSIZ
);
4824 char *p2
= &buf2
[0];
4827 error ("null pointer to remote bufer size specified");
4829 /* minimum outbuf size is PBUFSIZ - if bufsiz is not large enough let
4830 the caller know and return what the minimum size is */
4831 /* Note: a zero bufsiz can be used to query the minimum buffer size */
4832 if (*bufsiz
< PBUFSIZ
)
4838 /* except for querying the minimum buffer size, target must be open */
4840 error ("remote query is only available after target open");
4842 /* we only take uppercase letters as query types, at least for now */
4843 if ((query_type
< 'A') || (query_type
> 'Z'))
4844 error ("invalid remote query type");
4847 error ("null remote query specified");
4850 error ("remote query requires a buffer to receive data");
4857 /* we used one buffer char for the remote protocol q command and another
4858 for the query type. As the remote protocol encapsulation uses 4 chars
4859 plus one extra in case we are debugging (remote_debug),
4860 we have PBUFZIZ - 7 left to pack the query string */
4862 while (buf
[i
] && (i
< (PBUFSIZ
- 8)))
4864 /* bad caller may have sent forbidden characters */
4865 if ((!isprint (buf
[i
])) || (buf
[i
] == '$') || (buf
[i
] == '#'))
4866 error ("illegal characters in query string");
4874 error ("query larger than available buffer");
4880 getpkt (outbuf
, *bufsiz
, 0);
4886 remote_rcmd (char *command
,
4887 struct ui_file
*outbuf
)
4890 char *buf
= alloca (PBUFSIZ
);
4894 error ("remote rcmd is only available after target open");
4896 /* Send a NULL command across as an empty command */
4897 if (command
== NULL
)
4900 /* The query prefix */
4901 strcpy (buf
, "qRcmd,");
4902 p
= strchr (buf
, '\0');
4904 if ((strlen (buf
) + strlen (command
) * 2 + 8/*misc*/) > PBUFSIZ
)
4905 error ("\"monitor\" command ``%s'' is too long\n", command
);
4907 /* Encode the actual command */
4908 for (i
= 0; command
[i
]; i
++)
4910 *p
++ = tohex ((command
[i
] >> 4) & 0xf);
4911 *p
++ = tohex (command
[i
] & 0xf);
4915 if (putpkt (buf
) < 0)
4916 error ("Communication problem with target\n");
4918 /* get/display the response */
4921 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
4923 getpkt (buf
, PBUFSIZ
, 0);
4925 error ("Target does not support this command\n");
4926 if (buf
[0] == 'O' && buf
[1] != 'K')
4928 remote_console_output (buf
+ 1); /* 'O' message from stub */
4931 if (strcmp (buf
, "OK") == 0)
4933 if (strlen (buf
) == 3 && buf
[0] == 'E'
4934 && isdigit (buf
[1]) && isdigit (buf
[2]))
4936 error ("Protocol error with Rcmd");
4938 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
4940 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
4941 fputc_unfiltered (c
, outbuf
);
4948 packet_command (char *args
, int from_tty
)
4950 char *buf
= alloca (PBUFSIZ
);
4953 error ("command can only be used with remote target");
4956 error ("remote-packet command requires packet text as argument");
4958 puts_filtered ("sending: ");
4959 print_packet (args
);
4960 puts_filtered ("\n");
4963 getpkt (buf
, PBUFSIZ
, 0);
4964 puts_filtered ("received: ");
4966 puts_filtered ("\n");
4970 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
4972 static void display_thread_info (struct gdb_ext_thread_info
*info
);
4974 static void threadset_test_cmd (char *cmd
, int tty
);
4976 static void threadalive_test (char *cmd
, int tty
);
4978 static void threadlist_test_cmd (char *cmd
, int tty
);
4980 int get_and_display_threadinfo (threadref
* ref
);
4982 static void threadinfo_test_cmd (char *cmd
, int tty
);
4984 static int thread_display_step (threadref
* ref
, void *context
);
4986 static void threadlist_update_test_cmd (char *cmd
, int tty
);
4988 static void init_remote_threadtests (void);
4990 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
4993 threadset_test_cmd (char *cmd
, int tty
)
4995 int sample_thread
= SAMPLE_THREAD
;
4997 printf_filtered ("Remote threadset test\n");
4998 set_thread (sample_thread
, 1);
5003 threadalive_test (char *cmd
, int tty
)
5005 int sample_thread
= SAMPLE_THREAD
;
5007 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5008 printf_filtered ("PASS: Thread alive test\n");
5010 printf_filtered ("FAIL: Thread alive test\n");
5013 void output_threadid (char *title
, threadref
* ref
);
5016 output_threadid (char *title
, threadref
*ref
)
5020 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex */
5022 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5026 threadlist_test_cmd (char *cmd
, int tty
)
5029 threadref nextthread
;
5030 int done
, result_count
;
5031 threadref threadlist
[3];
5033 printf_filtered ("Remote Threadlist test\n");
5034 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5035 &result_count
, &threadlist
[0]))
5036 printf_filtered ("FAIL: threadlist test\n");
5039 threadref
*scan
= threadlist
;
5040 threadref
*limit
= scan
+ result_count
;
5042 while (scan
< limit
)
5043 output_threadid (" thread ", scan
++);
5048 display_thread_info (struct gdb_ext_thread_info
*info
)
5050 output_threadid ("Threadid: ", &info
->threadid
);
5051 printf_filtered ("Name: %s\n ", info
->shortname
);
5052 printf_filtered ("State: %s\n", info
->display
);
5053 printf_filtered ("other: %s\n\n", info
->more_display
);
5057 get_and_display_threadinfo (threadref
*ref
)
5061 struct gdb_ext_thread_info threadinfo
;
5063 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5064 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5065 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5066 display_thread_info (&threadinfo
);
5071 threadinfo_test_cmd (char *cmd
, int tty
)
5073 int athread
= SAMPLE_THREAD
;
5077 int_to_threadref (&thread
, athread
);
5078 printf_filtered ("Remote Threadinfo test\n");
5079 if (!get_and_display_threadinfo (&thread
))
5080 printf_filtered ("FAIL cannot get thread info\n");
5084 thread_display_step (threadref
*ref
, void *context
)
5086 /* output_threadid(" threadstep ",ref); *//* simple test */
5087 return get_and_display_threadinfo (ref
);
5091 threadlist_update_test_cmd (char *cmd
, int tty
)
5093 printf_filtered ("Remote Threadlist update test\n");
5094 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5098 init_remote_threadtests (void)
5100 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
5101 "Fetch and print the remote list of thread identifiers, one pkt only");
5102 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5103 "Fetch and display info about one thread");
5104 add_com ("tset", class_obscure
, threadset_test_cmd
,
5105 "Test setting to a different thread");
5106 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5107 "Iterate through updating all remote thread info");
5108 add_com ("talive", class_obscure
, threadalive_test
,
5109 " Remote thread alive test ");
5114 /* Convert a thread ID to a string. Returns the string in a static
5118 remote_pid_to_str (ptid_t ptid
)
5120 static char buf
[30];
5122 sprintf (buf
, "Thread %d", PIDGET (ptid
));
5127 init_remote_ops (void)
5129 remote_ops
.to_shortname
= "remote";
5130 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
5132 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5133 Specify the serial device it is connected to\n\
5134 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5135 remote_ops
.to_open
= remote_open
;
5136 remote_ops
.to_close
= remote_close
;
5137 remote_ops
.to_detach
= remote_detach
;
5138 remote_ops
.to_resume
= remote_resume
;
5139 remote_ops
.to_wait
= remote_wait
;
5140 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
5141 remote_ops
.to_store_registers
= remote_store_registers
;
5142 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5143 remote_ops
.to_xfer_memory
= remote_xfer_memory
;
5144 remote_ops
.to_files_info
= remote_files_info
;
5145 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5146 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5147 remote_ops
.to_kill
= remote_kill
;
5148 remote_ops
.to_load
= generic_load
;
5149 remote_ops
.to_mourn_inferior
= remote_mourn
;
5150 remote_ops
.to_thread_alive
= remote_thread_alive
;
5151 remote_ops
.to_find_new_threads
= remote_threads_info
;
5152 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5153 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
5154 remote_ops
.to_stop
= remote_stop
;
5155 remote_ops
.to_query
= remote_query
;
5156 remote_ops
.to_rcmd
= remote_rcmd
;
5157 remote_ops
.to_stratum
= process_stratum
;
5158 remote_ops
.to_has_all_memory
= 1;
5159 remote_ops
.to_has_memory
= 1;
5160 remote_ops
.to_has_stack
= 1;
5161 remote_ops
.to_has_registers
= 1;
5162 remote_ops
.to_has_execution
= 1;
5163 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5164 remote_ops
.to_magic
= OPS_MAGIC
;
5167 /* Set up the extended remote vector by making a copy of the standard
5168 remote vector and adding to it. */
5171 init_extended_remote_ops (void)
5173 extended_remote_ops
= remote_ops
;
5175 extended_remote_ops
.to_shortname
= "extended-remote";
5176 extended_remote_ops
.to_longname
=
5177 "Extended remote serial target in gdb-specific protocol";
5178 extended_remote_ops
.to_doc
=
5179 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5180 Specify the serial device it is connected to (e.g. /dev/ttya).",
5181 extended_remote_ops
.to_open
= extended_remote_open
;
5182 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
5183 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5187 * Command: info remote-process
5189 * This implements Cisco's version of the "info proc" command.
5191 * This query allows the target stub to return an arbitrary string
5192 * (or strings) giving arbitrary information about the target process.
5193 * This is optional; the target stub isn't required to implement it.
5195 * Syntax: qfProcessInfo request first string
5196 * qsProcessInfo request subsequent string
5197 * reply: 'O'<hex-encoded-string>
5198 * 'l' last reply (empty)
5202 remote_info_process (char *args
, int from_tty
)
5204 char *buf
= alloca (PBUFSIZ
);
5206 if (remote_desc
== 0)
5207 error ("Command can only be used when connected to the remote target.");
5209 putpkt ("qfProcessInfo");
5210 getpkt (buf
, PBUFSIZ
, 0);
5212 return; /* Silently: target does not support this feature. */
5215 error ("info proc: target error.");
5217 while (buf
[0] == 'O') /* Capitol-O packet */
5219 remote_console_output (&buf
[1]);
5220 putpkt ("qsProcessInfo");
5221 getpkt (buf
, PBUFSIZ
, 0);
5230 remote_cisco_open (char *name
, int from_tty
)
5234 "To open a remote debug connection, you need to specify what \n\
5235 device is attached to the remote system (e.g. host:port).");
5237 /* See FIXME above */
5238 wait_forever_enabled_p
= 1;
5240 target_preopen (from_tty
);
5242 unpush_target (&remote_cisco_ops
);
5244 remote_desc
= SERIAL_OPEN (name
);
5246 perror_with_name (name
);
5249 * If a baud rate was specified on the gdb command line it will
5250 * be greater than the initial value of -1. If it is, use it otherwise
5254 baud_rate
= (baud_rate
> 0) ? baud_rate
: 9600;
5255 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
5257 SERIAL_CLOSE (remote_desc
);
5258 perror_with_name (name
);
5261 SERIAL_RAW (remote_desc
);
5263 /* If there is something sitting in the buffer we might take it as a
5264 response to a command, which would be bad. */
5265 SERIAL_FLUSH_INPUT (remote_desc
);
5269 puts_filtered ("Remote debugging using ");
5270 puts_filtered (name
);
5271 puts_filtered ("\n");
5274 remote_cisco_mode
= 1;
5276 push_target (&remote_cisco_ops
); /* Switch to using cisco target now */
5278 init_all_packet_configs ();
5280 general_thread
= -2;
5281 continue_thread
= -2;
5283 /* Probe for ability to use "ThreadInfo" query, as required. */
5284 use_threadinfo_query
= 1;
5285 use_threadextra_query
= 1;
5287 /* Without this, some commands which require an active target (such
5288 as kill) won't work. This variable serves (at least) double duty
5289 as both the pid of the target process (if it has such), and as a
5290 flag indicating that a target is active. These functions should
5291 be split out into seperate variables, especially since GDB will
5292 someday have a notion of debugging several processes. */
5293 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
5295 /* Start the remote connection; if error (0), discard this target. */
5297 if (!catch_errors (remote_start_remote_dummy
, (char *) 0,
5298 "Couldn't establish connection to remote target\n",
5307 remote_cisco_close (int quitting
)
5309 remote_cisco_mode
= 0;
5310 remote_close (quitting
);
5314 remote_cisco_mourn (void)
5316 remote_mourn_1 (&remote_cisco_ops
);
5328 /* shared between readsocket() and readtty() */
5329 static char *tty_input
;
5331 static int escape_count
;
5332 static int echo_check
;
5333 extern int quit_flag
;
5340 /* Loop until the socket doesn't have any more data */
5342 while ((data
= readchar (0)) >= 0)
5344 /* Check for the escape sequence */
5347 /* If this is the fourth escape, get out */
5348 if (++escape_count
== 4)
5353 { /* This is a '|', but not the fourth in a row.
5354 Continue without echoing it. If it isn't actually
5355 one of four in a row, it'll be echoed later. */
5362 /* Ensure any pending '|'s are flushed. */
5364 for (; escape_count
> 0; escape_count
--)
5368 if (data
== '\r') /* If this is a return character, */
5369 continue; /* - just supress it. */
5371 if (echo_check
!= -1) /* Check for echo of user input. */
5373 if (tty_input
[echo_check
] == data
)
5375 echo_check
++; /* Character matched user input: */
5376 continue; /* Continue without echoing it. */
5378 else if ((data
== '\n') && (tty_input
[echo_check
] == '\r'))
5379 { /* End of the line (and of echo checking). */
5380 echo_check
= -1; /* No more echo supression */
5381 continue; /* Continue without echoing. */
5384 { /* Failed check for echo of user input.
5385 We now have some suppressed output to flush! */
5388 for (j
= 0; j
< echo_check
; j
++)
5389 putchar (tty_input
[j
]);
5393 putchar (data
); /* Default case: output the char. */
5396 if (data
== SERIAL_TIMEOUT
) /* Timeout returned from readchar. */
5397 return READ_MORE
; /* Try to read some more */
5399 return FATAL_ERROR
; /* Trouble, bail out */
5407 /* First, read a buffer full from the terminal */
5408 tty_bytecount
= read (fileno (stdin
), tty_input
, sizeof (tty_input
) - 1);
5409 if (tty_bytecount
== -1)
5411 perror ("readtty: read failed");
5415 /* Remove a quoted newline. */
5416 if (tty_input
[tty_bytecount
- 1] == '\n' &&
5417 tty_input
[tty_bytecount
- 2] == '\\') /* line ending in backslash */
5419 tty_input
[--tty_bytecount
] = 0; /* remove newline */
5420 tty_input
[--tty_bytecount
] = 0; /* remove backslash */
5423 /* Turn trailing newlines into returns */
5424 if (tty_input
[tty_bytecount
- 1] == '\n')
5425 tty_input
[tty_bytecount
- 1] = '\r';
5427 /* If the line consists of a ~, enter debugging mode. */
5428 if ((tty_input
[0] == '~') && (tty_bytecount
== 2))
5431 /* Make this a zero terminated string and write it out */
5432 tty_input
[tty_bytecount
] = 0;
5433 if (SERIAL_WRITE (remote_desc
, tty_input
, tty_bytecount
))
5435 perror_with_name ("readtty: write failed");
5445 fd_set input
; /* file descriptors for select */
5446 int tablesize
; /* max number of FDs for select */
5450 extern int escape_count
; /* global shared by readsocket */
5451 extern int echo_check
; /* ditto */
5456 tablesize
= 8 * sizeof (input
);
5460 /* Check for anything from our socket - doesn't block. Note that
5461 this must be done *before* the select as there may be
5462 buffered I/O waiting to be processed. */
5464 if ((status
= readsocket ()) == FATAL_ERROR
)
5466 error ("Debugging terminated by communications error");
5468 else if (status
!= READ_MORE
)
5473 fflush (stdout
); /* Flush output before blocking */
5475 /* Now block on more socket input or TTY input */
5478 FD_SET (fileno (stdin
), &input
);
5479 FD_SET (DEPRECATED_SERIAL_FD (remote_desc
), &input
);
5481 status
= select (tablesize
, &input
, 0, 0, 0);
5482 if ((status
== -1) && (errno
!= EINTR
))
5484 error ("Communications error on select %d", errno
);
5487 /* Handle Control-C typed */
5491 if ((++quit_count
) == 2)
5493 if (query ("Interrupt GDB? "))
5495 printf_filtered ("Interrupted by user.\n");
5496 return_to_top_level (RETURN_QUIT
);
5503 SERIAL_SEND_BREAK (remote_desc
);
5505 SERIAL_WRITE (remote_desc
, "\003", 1);
5510 /* Handle console input */
5512 if (FD_ISSET (fileno (stdin
), &input
))
5516 status
= readtty ();
5517 if (status
== READ_MORE
)
5520 return status
; /* telnet session ended */
5526 remote_cisco_wait (ptid_t ptid
, struct target_waitstatus
*status
)
5528 if (minitelnet () != ENTER_DEBUG
)
5530 error ("Debugging session terminated by protocol error");
5533 return remote_wait (ptid
, status
);
5537 init_remote_cisco_ops (void)
5539 remote_cisco_ops
.to_shortname
= "cisco";
5540 remote_cisco_ops
.to_longname
= "Remote serial target in cisco-specific protocol";
5541 remote_cisco_ops
.to_doc
=
5542 "Use a remote machine via TCP, using a cisco-specific protocol.\n\
5543 Specify the serial device it is connected to (e.g. host:2020).";
5544 remote_cisco_ops
.to_open
= remote_cisco_open
;
5545 remote_cisco_ops
.to_close
= remote_cisco_close
;
5546 remote_cisco_ops
.to_detach
= remote_detach
;
5547 remote_cisco_ops
.to_resume
= remote_resume
;
5548 remote_cisco_ops
.to_wait
= remote_cisco_wait
;
5549 remote_cisco_ops
.to_fetch_registers
= remote_fetch_registers
;
5550 remote_cisco_ops
.to_store_registers
= remote_store_registers
;
5551 remote_cisco_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5552 remote_cisco_ops
.to_xfer_memory
= remote_xfer_memory
;
5553 remote_cisco_ops
.to_files_info
= remote_files_info
;
5554 remote_cisco_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5555 remote_cisco_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5556 remote_cisco_ops
.to_kill
= remote_kill
;
5557 remote_cisco_ops
.to_load
= generic_load
;
5558 remote_cisco_ops
.to_mourn_inferior
= remote_cisco_mourn
;
5559 remote_cisco_ops
.to_thread_alive
= remote_thread_alive
;
5560 remote_cisco_ops
.to_find_new_threads
= remote_threads_info
;
5561 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5562 remote_cisco_ops
.to_stratum
= process_stratum
;
5563 remote_cisco_ops
.to_has_all_memory
= 1;
5564 remote_cisco_ops
.to_has_memory
= 1;
5565 remote_cisco_ops
.to_has_stack
= 1;
5566 remote_cisco_ops
.to_has_registers
= 1;
5567 remote_cisco_ops
.to_has_execution
= 1;
5568 remote_cisco_ops
.to_magic
= OPS_MAGIC
;
5572 remote_can_async_p (void)
5574 /* We're async whenever the serial device is. */
5575 return (current_target
.to_async_mask_value
) && SERIAL_CAN_ASYNC_P (remote_desc
);
5579 remote_is_async_p (void)
5581 /* We're async whenever the serial device is. */
5582 return (current_target
.to_async_mask_value
) && SERIAL_IS_ASYNC_P (remote_desc
);
5585 /* Pass the SERIAL event on and up to the client. One day this code
5586 will be able to delay notifying the client of an event until the
5587 point where an entire packet has been received. */
5589 static void (*async_client_callback
) (enum inferior_event_type event_type
, void *context
);
5590 static void *async_client_context
;
5591 static serial_event_ftype remote_async_serial_handler
;
5594 remote_async_serial_handler (serial_t scb
, void *context
)
5596 /* Don't propogate error information up to the client. Instead let
5597 the client find out about the error by querying the target. */
5598 async_client_callback (INF_REG_EVENT
, async_client_context
);
5602 remote_async (void (*callback
) (enum inferior_event_type event_type
, void *context
), void *context
)
5604 if (current_target
.to_async_mask_value
== 0)
5605 internal_error (__FILE__
, __LINE__
,
5606 "Calling remote_async when async is masked");
5608 if (callback
!= NULL
)
5610 SERIAL_ASYNC (remote_desc
, remote_async_serial_handler
, NULL
);
5611 async_client_callback
= callback
;
5612 async_client_context
= context
;
5615 SERIAL_ASYNC (remote_desc
, NULL
, NULL
);
5618 /* Target async and target extended-async.
5620 This are temporary targets, until it is all tested. Eventually
5621 async support will be incorporated int the usual 'remote'
5625 init_remote_async_ops (void)
5627 remote_async_ops
.to_shortname
= "async";
5628 remote_async_ops
.to_longname
= "Remote serial target in async version of the gdb-specific protocol";
5629 remote_async_ops
.to_doc
=
5630 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5631 Specify the serial device it is connected to (e.g. /dev/ttya).";
5632 remote_async_ops
.to_open
= remote_async_open
;
5633 remote_async_ops
.to_close
= remote_close
;
5634 remote_async_ops
.to_detach
= remote_async_detach
;
5635 remote_async_ops
.to_resume
= remote_async_resume
;
5636 remote_async_ops
.to_wait
= remote_async_wait
;
5637 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
5638 remote_async_ops
.to_store_registers
= remote_store_registers
;
5639 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5640 remote_async_ops
.to_xfer_memory
= remote_xfer_memory
;
5641 remote_async_ops
.to_files_info
= remote_files_info
;
5642 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5643 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5644 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
5645 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
5646 remote_async_ops
.to_kill
= remote_async_kill
;
5647 remote_async_ops
.to_load
= generic_load
;
5648 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
5649 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
5650 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
5651 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5652 remote_async_ops
.to_stop
= remote_stop
;
5653 remote_async_ops
.to_query
= remote_query
;
5654 remote_async_ops
.to_rcmd
= remote_rcmd
;
5655 remote_async_ops
.to_stratum
= process_stratum
;
5656 remote_async_ops
.to_has_all_memory
= 1;
5657 remote_async_ops
.to_has_memory
= 1;
5658 remote_async_ops
.to_has_stack
= 1;
5659 remote_async_ops
.to_has_registers
= 1;
5660 remote_async_ops
.to_has_execution
= 1;
5661 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5662 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
5663 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
5664 remote_async_ops
.to_async
= remote_async
;
5665 remote_async_ops
.to_async_mask_value
= 1;
5666 remote_async_ops
.to_magic
= OPS_MAGIC
;
5669 /* Set up the async extended remote vector by making a copy of the standard
5670 remote vector and adding to it. */
5673 init_extended_async_remote_ops (void)
5675 extended_async_remote_ops
= remote_async_ops
;
5677 extended_async_remote_ops
.to_shortname
= "extended-async";
5678 extended_async_remote_ops
.to_longname
=
5679 "Extended remote serial target in async gdb-specific protocol";
5680 extended_async_remote_ops
.to_doc
=
5681 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5682 Specify the serial device it is connected to (e.g. /dev/ttya).",
5683 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
5684 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
5685 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5689 set_remote_cmd (char *args
, int from_tty
)
5695 show_remote_cmd (char *args
, int from_tty
)
5698 show_remote_protocol_Z_packet_cmd (args
, from_tty
);
5699 show_remote_protocol_e_packet_cmd (args
, from_tty
);
5700 show_remote_protocol_E_packet_cmd (args
, from_tty
);
5701 show_remote_protocol_P_packet_cmd (args
, from_tty
);
5702 show_remote_protocol_binary_download_cmd (args
, from_tty
);
5706 build_remote_gdbarch_data (void)
5708 build_remote_packet_sizes ();
5711 tty_input
= xmalloc (PBUFSIZ
);
5712 remote_address_size
= TARGET_ADDR_BIT
;
5716 _initialize_remote (void)
5718 static struct cmd_list_element
*remote_set_cmdlist
;
5719 static struct cmd_list_element
*remote_show_cmdlist
;
5720 struct cmd_list_element
*tmpcmd
;
5722 /* architecture specific data */
5723 build_remote_gdbarch_data ();
5724 register_gdbarch_swap (&tty_input
, sizeof (&tty_input
), NULL
);
5725 register_remote_packet_sizes ();
5726 register_gdbarch_swap (&remote_address_size
,
5727 sizeof (&remote_address_size
), NULL
);
5728 register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
5731 add_target (&remote_ops
);
5733 init_extended_remote_ops ();
5734 add_target (&extended_remote_ops
);
5736 init_remote_async_ops ();
5737 add_target (&remote_async_ops
);
5739 init_extended_async_remote_ops ();
5740 add_target (&extended_async_remote_ops
);
5742 init_remote_cisco_ops ();
5743 add_target (&remote_cisco_ops
);
5746 init_remote_threadtests ();
5749 /* set/show remote ... */
5751 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, "\
5752 Remote protocol specific variables\n\
5753 Configure various remote-protocol specific variables such as\n\
5754 the packets being used",
5755 &remote_set_cmdlist
, "set remote ",
5756 0/*allow-unknown*/, &setlist
);
5757 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, "\
5758 Remote protocol specific variables\n\
5759 Configure various remote-protocol specific variables such as\n\
5760 the packets being used",
5761 &remote_show_cmdlist
, "show remote ",
5762 0/*allow-unknown*/, &showlist
);
5764 add_cmd ("compare-sections", class_obscure
, compare_sections_command
,
5765 "Compare section data on target to the exec file.\n\
5766 Argument is a single section name (default: all loaded sections).",
5769 add_cmd ("packet", class_maintenance
, packet_command
,
5770 "Send an arbitrary packet to a remote target.\n\
5771 maintenance packet TEXT\n\
5772 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5773 this command sends the string TEXT to the inferior, and displays the\n\
5774 response packet. GDB supplies the initial `$' character, and the\n\
5775 terminating `#' character and checksum.",
5779 (add_set_cmd ("remotebreak", no_class
,
5780 var_boolean
, (char *) &remote_break
,
5781 "Set whether to send break if interrupted.\n",
5785 /* Install commands for configuring memory read/write packets. */
5787 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
,
5788 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5790 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
,
5791 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5793 add_cmd ("memory-write-packet-size", no_class
,
5794 set_memory_write_packet_size
,
5795 "Set the maximum number of bytes per memory-write packet.\n"
5796 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5797 "default packet size. The actual limit is further reduced\n"
5798 "dependent on the target. Specify ``fixed'' to disable the\n"
5799 "further restriction and ``limit'' to enable that restriction\n",
5800 &remote_set_cmdlist
);
5801 add_cmd ("memory-read-packet-size", no_class
,
5802 set_memory_read_packet_size
,
5803 "Set the maximum number of bytes per memory-read packet.\n"
5804 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5805 "default packet size. The actual limit is further reduced\n"
5806 "dependent on the target. Specify ``fixed'' to disable the\n"
5807 "further restriction and ``limit'' to enable that restriction\n",
5808 &remote_set_cmdlist
);
5809 add_cmd ("memory-write-packet-size", no_class
,
5810 show_memory_write_packet_size
,
5811 "Show the maximum number of bytes per memory-write packet.\n",
5812 &remote_show_cmdlist
);
5813 add_cmd ("memory-read-packet-size", no_class
,
5814 show_memory_read_packet_size
,
5815 "Show the maximum number of bytes per memory-read packet.\n",
5816 &remote_show_cmdlist
);
5819 (add_set_cmd ("remoteaddresssize", class_obscure
,
5820 var_integer
, (char *) &remote_address_size
,
5821 "Set the maximum size of the address (in bits) \
5822 in a memory packet.\n",
5826 add_packet_config_cmd (&remote_protocol_binary_download
,
5827 "X", "binary-download",
5828 set_remote_protocol_binary_download_cmd
,
5829 show_remote_protocol_binary_download_cmd
,
5830 &remote_set_cmdlist
, &remote_show_cmdlist
,
5833 /* XXXX - should ``set remotebinarydownload'' be retained for
5836 (add_set_cmd ("remotebinarydownload", no_class
,
5837 var_boolean
, (char *) &remote_binary_download
,
5838 "Set binary downloads.\n", &setlist
),
5842 add_info ("remote-process", remote_info_process
,
5843 "Query the remote system for process info.");
5845 add_packet_config_cmd (&remote_protocol_e
,
5846 "e", "step-over-range",
5847 set_remote_protocol_e_packet_cmd
,
5848 show_remote_protocol_e_packet_cmd
,
5849 &remote_set_cmdlist
, &remote_show_cmdlist
,
5852 add_packet_config_cmd (&remote_protocol_E
,
5853 "E", "step-over-range-w-signal",
5854 set_remote_protocol_E_packet_cmd
,
5855 show_remote_protocol_E_packet_cmd
,
5856 &remote_set_cmdlist
, &remote_show_cmdlist
,
5859 add_packet_config_cmd (&remote_protocol_P
,
5860 "P", "set-register",
5861 set_remote_protocol_P_packet_cmd
,
5862 show_remote_protocol_P_packet_cmd
,
5863 &remote_set_cmdlist
, &remote_show_cmdlist
,
5866 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
],
5867 "Z0", "software-breakpoint",
5868 set_remote_protocol_Z_software_bp_packet_cmd
,
5869 show_remote_protocol_Z_software_bp_packet_cmd
,
5870 &remote_set_cmdlist
, &remote_show_cmdlist
,
5873 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
],
5874 "Z1", "hardware-breakpoint",
5875 set_remote_protocol_Z_hardware_bp_packet_cmd
,
5876 show_remote_protocol_Z_hardware_bp_packet_cmd
,
5877 &remote_set_cmdlist
, &remote_show_cmdlist
,
5880 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
],
5881 "Z2", "write-watchpoint",
5882 set_remote_protocol_Z_write_wp_packet_cmd
,
5883 show_remote_protocol_Z_write_wp_packet_cmd
,
5884 &remote_set_cmdlist
, &remote_show_cmdlist
,
5887 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
],
5888 "Z3", "read-watchpoint",
5889 set_remote_protocol_Z_read_wp_packet_cmd
,
5890 show_remote_protocol_Z_read_wp_packet_cmd
,
5891 &remote_set_cmdlist
, &remote_show_cmdlist
,
5894 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
],
5895 "Z4", "access-watchpoint",
5896 set_remote_protocol_Z_access_wp_packet_cmd
,
5897 show_remote_protocol_Z_access_wp_packet_cmd
,
5898 &remote_set_cmdlist
, &remote_show_cmdlist
,
5901 /* Keep the old ``set remote Z-packet ...'' working. */
5902 tmpcmd
= add_set_auto_boolean_cmd ("Z-packet", class_obscure
,
5903 &remote_Z_packet_detect
,
5905 Set use of remote protocol `Z' packets", &remote_set_cmdlist
);
5906 tmpcmd
->function
.sfunc
= set_remote_protocol_Z_packet_cmd
;
5907 add_cmd ("Z-packet", class_obscure
, show_remote_protocol_Z_packet_cmd
,
5908 "Show use of remote protocol `Z' packets ",
5909 &remote_show_cmdlist
);