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 static int fromhex (int a
);
191 static int hex2bin (const char *hex
, char *bin
, int);
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);
1738 n
= min (strlen (bufp
) / 2, sizeof (display_buf
));
1739 result
= hex2bin (bufp
, display_buf
, n
);
1740 display_buf
[result
] = '\0';
1745 /* If the above query fails, fall back to the old method. */
1746 use_threadextra_query
= 0;
1747 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1748 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1749 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1750 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1751 if (threadinfo
.active
)
1753 if (*threadinfo
.shortname
)
1754 n
+= sprintf(&display_buf
[0], " Name: %s,", threadinfo
.shortname
);
1755 if (*threadinfo
.display
)
1756 n
+= sprintf(&display_buf
[n
], " State: %s,", threadinfo
.display
);
1757 if (*threadinfo
.more_display
)
1758 n
+= sprintf(&display_buf
[n
], " Priority: %s",
1759 threadinfo
.more_display
);
1763 /* for purely cosmetic reasons, clear up trailing commas */
1764 if (',' == display_buf
[n
-1])
1765 display_buf
[n
-1] = ' ';
1774 /* Restart the remote side; this is an extended protocol operation. */
1777 extended_remote_restart (void)
1779 char *buf
= alloca (PBUFSIZ
);
1781 /* Send the restart command; for reasons I don't understand the
1782 remote side really expects a number after the "R". */
1784 sprintf (&buf
[1], "%x", 0);
1787 /* Now query for status so this looks just like we restarted
1788 gdbserver from scratch. */
1790 getpkt (buf
, PBUFSIZ
, 0);
1793 /* Clean up connection to a remote debugger. */
1797 remote_close (int quitting
)
1800 SERIAL_CLOSE (remote_desc
);
1804 /* Query the remote side for the text, data and bss offsets. */
1809 char *buf
= alloca (PBUFSIZ
);
1812 CORE_ADDR text_addr
, data_addr
, bss_addr
;
1813 struct section_offsets
*offs
;
1815 putpkt ("qOffsets");
1817 getpkt (buf
, PBUFSIZ
, 0);
1819 if (buf
[0] == '\000')
1820 return; /* Return silently. Stub doesn't support
1824 warning ("Remote failure reply: %s", buf
);
1828 /* Pick up each field in turn. This used to be done with scanf, but
1829 scanf will make trouble if CORE_ADDR size doesn't match
1830 conversion directives correctly. The following code will work
1831 with any size of CORE_ADDR. */
1832 text_addr
= data_addr
= bss_addr
= 0;
1836 if (strncmp (ptr
, "Text=", 5) == 0)
1839 /* Don't use strtol, could lose on big values. */
1840 while (*ptr
&& *ptr
!= ';')
1841 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
1846 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
1849 while (*ptr
&& *ptr
!= ';')
1850 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
1855 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
1858 while (*ptr
&& *ptr
!= ';')
1859 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
1865 error ("Malformed response to offset query, %s", buf
);
1867 if (symfile_objfile
== NULL
)
1870 offs
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1871 memcpy (offs
, symfile_objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1873 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
1875 /* This is a temporary kludge to force data and bss to use the same offsets
1876 because that's what nlmconv does now. The real solution requires changes
1877 to the stub and remote.c that I don't have time to do right now. */
1879 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
1880 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
1882 objfile_relocate (symfile_objfile
, offs
);
1886 * Cisco version of section offsets:
1888 * Instead of having GDB query the target for the section offsets,
1889 * Cisco lets the target volunteer the information! It's also in
1890 * a different format, so here are the functions that will decode
1891 * a section offset packet from a Cisco target.
1895 * Function: remote_cisco_section_offsets
1897 * Returns: zero for success, non-zero for failure
1901 remote_cisco_section_offsets (bfd_vma text_addr
,
1904 bfd_signed_vma
*text_offs
,
1905 bfd_signed_vma
*data_offs
,
1906 bfd_signed_vma
*bss_offs
)
1908 bfd_vma text_base
, data_base
, bss_base
;
1909 struct minimal_symbol
*start
;
1914 if (symfile_objfile
== NULL
)
1915 return -1; /* no can do nothin' */
1917 start
= lookup_minimal_symbol ("_start", NULL
, NULL
);
1919 return -1; /* Can't find "_start" symbol */
1921 data_base
= bss_base
= 0;
1922 text_base
= SYMBOL_VALUE_ADDRESS (start
);
1924 abfd
= symfile_objfile
->obfd
;
1925 for (sect
= abfd
->sections
;
1929 const char *p
= bfd_get_section_name (abfd
, sect
);
1931 if (strcmp (p
+ len
- 4, "data") == 0) /* ends in "data" */
1932 if (data_base
== 0 ||
1933 data_base
> bfd_get_section_vma (abfd
, sect
))
1934 data_base
= bfd_get_section_vma (abfd
, sect
);
1935 if (strcmp (p
+ len
- 3, "bss") == 0) /* ends in "bss" */
1936 if (bss_base
== 0 ||
1937 bss_base
> bfd_get_section_vma (abfd
, sect
))
1938 bss_base
= bfd_get_section_vma (abfd
, sect
);
1940 *text_offs
= text_addr
- text_base
;
1941 *data_offs
= data_addr
- data_base
;
1942 *bss_offs
= bss_addr
- bss_base
;
1947 sprintf (tmp
, "VMA: text = 0x");
1948 sprintf_vma (tmp
+ strlen (tmp
), text_addr
);
1949 sprintf (tmp
+ strlen (tmp
), " data = 0x");
1950 sprintf_vma (tmp
+ strlen (tmp
), data_addr
);
1951 sprintf (tmp
+ strlen (tmp
), " bss = 0x");
1952 sprintf_vma (tmp
+ strlen (tmp
), bss_addr
);
1953 fprintf_filtered (gdb_stdlog
, tmp
);
1954 fprintf_filtered (gdb_stdlog
,
1955 "Reloc offset: text = 0x%s data = 0x%s bss = 0x%s\n",
1956 paddr_nz (*text_offs
),
1957 paddr_nz (*data_offs
),
1958 paddr_nz (*bss_offs
));
1965 * Function: remote_cisco_objfile_relocate
1967 * Relocate the symbol file for a remote target.
1971 remote_cisco_objfile_relocate (bfd_signed_vma text_off
, bfd_signed_vma data_off
,
1972 bfd_signed_vma bss_off
)
1974 struct section_offsets
*offs
;
1976 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
1978 /* FIXME: This code assumes gdb-stabs.h is being used; it's
1979 broken for xcoff, dwarf, sdb-coff, etc. But there is no
1980 simple canonical representation for this stuff. */
1982 offs
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1983 memcpy (offs
, symfile_objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1985 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_off
;
1986 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_off
;
1987 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = bss_off
;
1989 /* First call the standard objfile_relocate. */
1990 objfile_relocate (symfile_objfile
, offs
);
1992 /* Now we need to fix up the section entries already attached to
1993 the exec target. These entries will control memory transfers
1994 from the exec file. */
1996 exec_set_section_offsets (text_off
, data_off
, bss_off
);
2000 /* Stub for catch_errors. */
2003 remote_start_remote_dummy (void *dummy
)
2005 start_remote (); /* Initialize gdb process mechanisms */
2010 remote_start_remote (PTR dummy
)
2012 immediate_quit
++; /* Allow user to interrupt it */
2014 /* Ack any packet which the remote side has already sent. */
2015 SERIAL_WRITE (remote_desc
, "+", 1);
2017 /* Let the stub know that we want it to return the thread. */
2020 inferior_ptid
= remote_current_thread (inferior_ptid
);
2022 get_offsets (); /* Get text, data & bss offsets */
2024 putpkt ("?"); /* initiate a query from remote machine */
2027 return remote_start_remote_dummy (dummy
);
2030 /* Open a connection to a remote debugger.
2031 NAME is the filename used for communication. */
2034 remote_open (char *name
, int from_tty
)
2036 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2039 /* Just like remote_open, but with asynchronous support. */
2041 remote_async_open (char *name
, int from_tty
)
2043 remote_async_open_1 (name
, from_tty
, &remote_async_ops
, 0);
2046 /* Open a connection to a remote debugger using the extended
2047 remote gdb protocol. NAME is the filename used for communication. */
2050 extended_remote_open (char *name
, int from_tty
)
2052 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */ );
2055 /* Just like extended_remote_open, but with asynchronous support. */
2057 extended_remote_async_open (char *name
, int from_tty
)
2059 remote_async_open_1 (name
, from_tty
, &extended_async_remote_ops
, 1 /*extended_p */ );
2062 /* Generic code for opening a connection to a remote target. */
2065 init_all_packet_configs (void)
2068 update_packet_config (&remote_protocol_e
);
2069 update_packet_config (&remote_protocol_E
);
2070 update_packet_config (&remote_protocol_P
);
2071 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2072 update_packet_config (&remote_protocol_Z
[i
]);
2073 /* Force remote_write_bytes to check whether target supports binary
2075 update_packet_config (&remote_protocol_binary_download
);
2079 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2083 error ("To open a remote debug connection, you need to specify what\n\
2084 serial device is attached to the remote system\n\
2085 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2087 /* See FIXME above */
2088 wait_forever_enabled_p
= 1;
2090 target_preopen (from_tty
);
2092 unpush_target (target
);
2094 remote_desc
= SERIAL_OPEN (name
);
2096 perror_with_name (name
);
2098 if (baud_rate
!= -1)
2100 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
2102 SERIAL_CLOSE (remote_desc
);
2103 perror_with_name (name
);
2107 SERIAL_RAW (remote_desc
);
2109 /* If there is something sitting in the buffer we might take it as a
2110 response to a command, which would be bad. */
2111 SERIAL_FLUSH_INPUT (remote_desc
);
2115 puts_filtered ("Remote debugging using ");
2116 puts_filtered (name
);
2117 puts_filtered ("\n");
2119 push_target (target
); /* Switch to using remote target now */
2121 init_all_packet_configs ();
2123 general_thread
= -2;
2124 continue_thread
= -2;
2126 /* Probe for ability to use "ThreadInfo" query, as required. */
2127 use_threadinfo_query
= 1;
2128 use_threadextra_query
= 1;
2130 /* Without this, some commands which require an active target (such
2131 as kill) won't work. This variable serves (at least) double duty
2132 as both the pid of the target process (if it has such), and as a
2133 flag indicating that a target is active. These functions should
2134 be split out into seperate variables, especially since GDB will
2135 someday have a notion of debugging several processes. */
2137 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2138 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2139 /* First delete any symbols previously loaded from shared libraries. */
2140 no_shared_libraries (NULL
, 0);
2143 /* Start the remote connection; if error (0), discard this target.
2144 In particular, if the user quits, be sure to discard it
2145 (we'd be in an inconsistent state otherwise). */
2146 if (!catch_errors (remote_start_remote
, NULL
,
2147 "Couldn't establish connection to remote target\n",
2156 /* Tell the remote that we are using the extended protocol. */
2157 char *buf
= alloca (PBUFSIZ
);
2159 getpkt (buf
, PBUFSIZ
, 0);
2161 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2162 /* FIXME: need a master target_open vector from which all
2163 remote_opens can be called, so that stuff like this can
2164 go there. Failing that, the following code must be copied
2165 to the open function for any remote target that wants to
2166 support svr4 shared libraries. */
2168 /* Set up to detect and load shared libraries. */
2169 if (exec_bfd
) /* No use without an exec file. */
2170 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
2174 /* Just like remote_open but with asynchronous support. */
2176 remote_async_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2180 error ("To open a remote debug connection, you need to specify what\n\
2181 serial device is attached to the remote system\n\
2182 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2184 target_preopen (from_tty
);
2186 unpush_target (target
);
2188 remote_desc
= SERIAL_OPEN (name
);
2190 perror_with_name (name
);
2192 if (baud_rate
!= -1)
2194 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
2196 SERIAL_CLOSE (remote_desc
);
2197 perror_with_name (name
);
2201 SERIAL_RAW (remote_desc
);
2203 /* If there is something sitting in the buffer we might take it as a
2204 response to a command, which would be bad. */
2205 SERIAL_FLUSH_INPUT (remote_desc
);
2209 puts_filtered ("Remote debugging using ");
2210 puts_filtered (name
);
2211 puts_filtered ("\n");
2214 push_target (target
); /* Switch to using remote target now */
2216 init_all_packet_configs ();
2218 general_thread
= -2;
2219 continue_thread
= -2;
2221 /* Probe for ability to use "ThreadInfo" query, as required. */
2222 use_threadinfo_query
= 1;
2223 use_threadextra_query
= 1;
2225 /* Without this, some commands which require an active target (such
2226 as kill) won't work. This variable serves (at least) double duty
2227 as both the pid of the target process (if it has such), and as a
2228 flag indicating that a target is active. These functions should
2229 be split out into seperate variables, especially since GDB will
2230 someday have a notion of debugging several processes. */
2231 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2233 /* With this target we start out by owning the terminal. */
2234 remote_async_terminal_ours_p
= 1;
2236 /* FIXME: cagney/1999-09-23: During the initial connection it is
2237 assumed that the target is already ready and able to respond to
2238 requests. Unfortunately remote_start_remote() eventually calls
2239 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2240 around this. Eventually a mechanism that allows
2241 wait_for_inferior() to expect/get timeouts will be
2243 wait_forever_enabled_p
= 0;
2245 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2246 /* First delete any symbols previously loaded from shared libraries. */
2247 no_shared_libraries (NULL
, 0);
2250 /* Start the remote connection; if error (0), discard this target.
2251 In particular, if the user quits, be sure to discard it
2252 (we'd be in an inconsistent state otherwise). */
2253 if (!catch_errors (remote_start_remote
, NULL
,
2254 "Couldn't establish connection to remote target\n",
2258 wait_forever_enabled_p
= 1;
2262 wait_forever_enabled_p
= 1;
2266 /* Tell the remote that we are using the extended protocol. */
2267 char *buf
= alloca (PBUFSIZ
);
2269 getpkt (buf
, PBUFSIZ
, 0);
2271 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2272 /* FIXME: need a master target_open vector from which all
2273 remote_opens can be called, so that stuff like this can
2274 go there. Failing that, the following code must be copied
2275 to the open function for any remote target that wants to
2276 support svr4 shared libraries. */
2278 /* Set up to detect and load shared libraries. */
2279 if (exec_bfd
) /* No use without an exec file. */
2280 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
2284 /* This takes a program previously attached to and detaches it. After
2285 this is done, GDB can be used to debug some other program. We
2286 better not have left any breakpoints in the target program or it'll
2287 die when it hits one. */
2290 remote_detach (char *args
, int from_tty
)
2292 char *buf
= alloca (PBUFSIZ
);
2295 error ("Argument given to \"detach\" when remotely debugging.");
2297 /* Tell the remote target to detach. */
2299 remote_send (buf
, PBUFSIZ
);
2301 target_mourn_inferior ();
2303 puts_filtered ("Ending remote debugging.\n");
2307 /* Same as remote_detach, but with async support. */
2309 remote_async_detach (char *args
, int from_tty
)
2311 char *buf
= alloca (PBUFSIZ
);
2314 error ("Argument given to \"detach\" when remotely debugging.");
2316 /* Tell the remote target to detach. */
2318 remote_send (buf
, PBUFSIZ
);
2320 /* Unregister the file descriptor from the event loop. */
2321 if (target_is_async_p ())
2322 SERIAL_ASYNC (remote_desc
, NULL
, 0);
2324 target_mourn_inferior ();
2326 puts_filtered ("Ending remote debugging.\n");
2329 /* Convert hex digit A to a number. */
2334 if (a
>= '0' && a
<= '9')
2336 else if (a
>= 'a' && a
<= 'f')
2337 return a
- 'a' + 10;
2338 else if (a
>= 'A' && a
<= 'F')
2339 return a
- 'A' + 10;
2341 error ("Reply contains invalid hex digit %d", a
);
2345 hex2bin (const char *hex
, char *bin
, int count
)
2349 /* May use a length, or a nul-terminated string as input. */
2351 count
= strlen (hex
) / 2;
2353 for (i
= 0; i
< count
; i
++)
2355 if (hex
[0] == 0 || hex
[1] == 0)
2357 /* Hex string is short, or of uneven length.
2358 Return the count that has been converted so far. */
2361 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
2367 /* Convert number NIB to a hex digit. */
2375 return 'a' + nib
- 10;
2379 bin2hex (char *bin
, char *hex
, int count
)
2382 /* May use a length, or a nul-terminated string as input. */
2384 count
= strlen (bin
);
2386 for (i
= 0; i
< count
; i
++)
2388 *hex
++ = tohex ((*bin
>> 4) & 0xf);
2389 *hex
++ = tohex (*bin
++ & 0xf);
2395 /* Tell the remote machine to resume. */
2397 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2399 static int last_sent_step
;
2402 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2404 char *buf
= alloca (PBUFSIZ
);
2405 int pid
= PIDGET (ptid
);
2409 set_thread (0, 0); /* run any thread */
2411 set_thread (pid
, 0); /* run this thread */
2413 last_sent_signal
= siggnal
;
2414 last_sent_step
= step
;
2416 /* A hook for when we need to do something at the last moment before
2418 if (target_resume_hook
)
2419 (*target_resume_hook
) ();
2422 /* The s/S/c/C packets do not return status. So if the target does
2423 not support the S or C packets, the debug agent returns an empty
2424 string which is detected in remote_wait(). This protocol defect
2425 is fixed in the e/E packets. */
2427 if (step
&& step_range_end
)
2429 /* If the target does not support the 'E' packet, we try the 'S'
2430 packet. Ideally we would fall back to the 'e' packet if that
2431 too is not supported. But that would require another copy of
2432 the code to issue the 'e' packet (and fall back to 's' if not
2433 supported) in remote_wait(). */
2435 if (siggnal
!= TARGET_SIGNAL_0
)
2437 if (remote_protocol_E
.support
!= PACKET_DISABLE
)
2441 *p
++ = tohex (((int) siggnal
>> 4) & 0xf);
2442 *p
++ = tohex (((int) siggnal
) & 0xf);
2444 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2446 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2450 getpkt (buf
, PBUFSIZ
, 0);
2452 if (packet_ok(buf
, &remote_protocol_E
) == PACKET_OK
)
2458 if (remote_protocol_e
.support
!= PACKET_DISABLE
)
2462 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2464 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2468 getpkt (buf
, PBUFSIZ
, 0);
2470 if (packet_ok(buf
, &remote_protocol_e
) == PACKET_OK
)
2476 if (siggnal
!= TARGET_SIGNAL_0
)
2478 buf
[0] = step
? 'S' : 'C';
2479 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2480 buf
[2] = tohex (((int) siggnal
) & 0xf);
2484 strcpy (buf
, step
? "s" : "c");
2489 /* Same as remote_resume, but with async support. */
2491 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2493 char *buf
= alloca (PBUFSIZ
);
2494 int pid
= PIDGET (ptid
);
2498 set_thread (0, 0); /* run any thread */
2500 set_thread (pid
, 0); /* run this thread */
2502 last_sent_signal
= siggnal
;
2503 last_sent_step
= step
;
2505 /* A hook for when we need to do something at the last moment before
2507 if (target_resume_hook
)
2508 (*target_resume_hook
) ();
2510 /* The s/S/c/C packets do not return status. So if the target does
2511 not support the S or C packets, the debug agent returns an empty
2512 string which is detected in remote_wait(). This protocol defect
2513 is fixed in the e/E packets. */
2515 if (step
&& step_range_end
)
2517 /* If the target does not support the 'E' packet, we try the 'S'
2518 packet. Ideally we would fall back to the 'e' packet if that
2519 too is not supported. But that would require another copy of
2520 the code to issue the 'e' packet (and fall back to 's' if not
2521 supported) in remote_wait(). */
2523 if (siggnal
!= TARGET_SIGNAL_0
)
2525 if (remote_protocol_E
.support
!= PACKET_DISABLE
)
2529 *p
++ = tohex (((int) siggnal
>> 4) & 0xf);
2530 *p
++ = tohex (((int) siggnal
) & 0xf);
2532 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2534 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2538 getpkt (buf
, PBUFSIZ
, 0);
2540 if (packet_ok(buf
, &remote_protocol_E
) == PACKET_OK
)
2541 goto register_event_loop
;
2546 if (remote_protocol_e
.support
!= PACKET_DISABLE
)
2550 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2552 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2556 getpkt (buf
, PBUFSIZ
, 0);
2558 if (packet_ok(buf
, &remote_protocol_e
) == PACKET_OK
)
2559 goto register_event_loop
;
2564 if (siggnal
!= TARGET_SIGNAL_0
)
2566 buf
[0] = step
? 'S' : 'C';
2567 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2568 buf
[2] = tohex ((int) siggnal
& 0xf);
2572 strcpy (buf
, step
? "s" : "c");
2576 register_event_loop
:
2577 /* We are about to start executing the inferior, let's register it
2578 with the event loop. NOTE: this is the one place where all the
2579 execution commands end up. We could alternatively do this in each
2580 of the execution commands in infcmd.c.*/
2581 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2582 into infcmd.c in order to allow inferior function calls to work
2583 NOT asynchronously. */
2584 if (event_loop_p
&& target_can_async_p ())
2585 target_async (inferior_event_handler
, 0);
2586 /* Tell the world that the target is now executing. */
2587 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2588 this? Instead, should the client of target just assume (for
2589 async targets) that the target is going to start executing? Is
2590 this information already found in the continuation block? */
2591 if (target_is_async_p ())
2592 target_executing
= 1;
2596 /* Set up the signal handler for SIGINT, while the target is
2597 executing, ovewriting the 'regular' SIGINT signal handler. */
2599 initialize_sigint_signal_handler (void)
2601 sigint_remote_token
=
2602 create_async_signal_handler (async_remote_interrupt
, NULL
);
2603 signal (SIGINT
, handle_remote_sigint
);
2606 /* Signal handler for SIGINT, while the target is executing. */
2608 handle_remote_sigint (int sig
)
2610 signal (sig
, handle_remote_sigint_twice
);
2611 sigint_remote_twice_token
=
2612 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2613 mark_async_signal_handler_wrapper (sigint_remote_token
);
2616 /* Signal handler for SIGINT, installed after SIGINT has already been
2617 sent once. It will take effect the second time that the user sends
2620 handle_remote_sigint_twice (int sig
)
2622 signal (sig
, handle_sigint
);
2623 sigint_remote_twice_token
=
2624 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2625 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2628 /* Perform the real interruption of the target execution, in response
2631 async_remote_interrupt (gdb_client_data arg
)
2634 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2639 /* Perform interrupt, if the first attempt did not succeed. Just give
2640 up on the target alltogether. */
2642 async_remote_interrupt_twice (gdb_client_data arg
)
2645 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2646 /* Do something only if the target was not killed by the previous
2648 if (target_executing
)
2651 signal (SIGINT
, handle_remote_sigint
);
2655 /* Reinstall the usual SIGINT handlers, after the target has
2658 cleanup_sigint_signal_handler (void *dummy
)
2660 signal (SIGINT
, handle_sigint
);
2661 if (sigint_remote_twice_token
)
2662 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_twice_token
);
2663 if (sigint_remote_token
)
2664 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_token
);
2667 /* Send ^C to target to halt it. Target will respond, and send us a
2669 static void (*ofunc
) (int);
2671 /* The command line interface's stop routine. This function is installed
2672 as a signal handler for SIGINT. The first time a user requests a
2673 stop, we call remote_stop to send a break or ^C. If there is no
2674 response from the target (it didn't stop when the user requested it),
2675 we ask the user if he'd like to detach from the target. */
2677 remote_interrupt (int signo
)
2679 /* If this doesn't work, try more severe steps. */
2680 signal (signo
, remote_interrupt_twice
);
2683 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2688 /* The user typed ^C twice. */
2691 remote_interrupt_twice (int signo
)
2693 signal (signo
, ofunc
);
2695 signal (signo
, remote_interrupt
);
2698 /* This is the generic stop called via the target vector. When a target
2699 interrupt is requested, either by the command line or the GUI, we
2700 will eventually end up here. */
2704 /* Send a break or a ^C, depending on user preference. */
2706 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2709 SERIAL_SEND_BREAK (remote_desc
);
2711 SERIAL_WRITE (remote_desc
, "\003", 1);
2714 /* Ask the user what to do when an interrupt is received. */
2717 interrupt_query (void)
2719 target_terminal_ours ();
2721 if (query ("Interrupted while waiting for the program.\n\
2722 Give up (and stop debugging it)? "))
2724 target_mourn_inferior ();
2725 return_to_top_level (RETURN_QUIT
);
2728 target_terminal_inferior ();
2731 /* Enable/disable target terminal ownership. Most targets can use
2732 terminal groups to control terminal ownership. Remote targets are
2733 different in that explicit transfer of ownership to/from GDB/target
2737 remote_async_terminal_inferior (void)
2739 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2740 sync_execution here. This function should only be called when
2741 GDB is resuming the inferior in the forground. A background
2742 resume (``run&'') should leave GDB in control of the terminal and
2743 consequently should not call this code. */
2744 if (!sync_execution
)
2746 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2747 calls target_terminal_*() idenpotent. The event-loop GDB talking
2748 to an asynchronous target with a synchronous command calls this
2749 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2750 stops trying to transfer the terminal to the target when it
2751 shouldn't this guard can go away. */
2752 if (!remote_async_terminal_ours_p
)
2754 delete_file_handler (input_fd
);
2755 remote_async_terminal_ours_p
= 0;
2756 initialize_sigint_signal_handler ();
2757 /* NOTE: At this point we could also register our selves as the
2758 recipient of all input. Any characters typed could then be
2759 passed on down to the target. */
2763 remote_async_terminal_ours (void)
2765 /* See FIXME in remote_async_terminal_inferior. */
2766 if (!sync_execution
)
2768 /* See FIXME in remote_async_terminal_inferior. */
2769 if (remote_async_terminal_ours_p
)
2771 cleanup_sigint_signal_handler (NULL
);
2772 add_file_handler (input_fd
, stdin_event_handler
, 0);
2773 remote_async_terminal_ours_p
= 1;
2776 /* If nonzero, ignore the next kill. */
2781 remote_console_output (char *msg
)
2785 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
2788 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
2791 fputs_unfiltered (tb
, gdb_stdtarg
);
2793 gdb_flush (gdb_stdtarg
);
2796 /* Wait until the remote machine stops, then return,
2797 storing status in STATUS just as `wait' would.
2798 Returns "pid", which in the case of a multi-threaded
2799 remote OS, is the thread-id. */
2802 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2804 unsigned char *buf
= alloca (PBUFSIZ
);
2805 int thread_num
= -1;
2807 status
->kind
= TARGET_WAITKIND_EXITED
;
2808 status
->value
.integer
= 0;
2814 ofunc
= signal (SIGINT
, remote_interrupt
);
2815 getpkt (buf
, PBUFSIZ
, 1);
2816 signal (SIGINT
, ofunc
);
2818 /* This is a hook for when we need to do something (perhaps the
2819 collection of trace data) every time the target stops. */
2820 if (target_wait_loop_hook
)
2821 (*target_wait_loop_hook
) ();
2825 case 'E': /* Error of some sort */
2826 warning ("Remote failure reply: %s", buf
);
2828 case 'T': /* Status with PC, SP, FP, ... */
2832 char* regs
= (char*) alloca (MAX_REGISTER_RAW_SIZE
);
2834 /* Expedited reply, containing Signal, {regno, reg} repeat */
2835 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2837 n... = register number
2838 r... = register contents
2840 p
= &buf
[3]; /* after Txx */
2847 /* Read the register number */
2848 regno
= strtol ((const char *) p
, &p_temp
, 16);
2849 p1
= (unsigned char *) p_temp
;
2851 if (p1
== p
) /* No register number present here */
2853 p1
= (unsigned char *) strchr ((const char *) p
, ':');
2855 warning ("Malformed packet(a) (missing colon): %s\n\
2858 if (strncmp ((const char *) p
, "thread", p1
- p
) == 0)
2860 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2861 record_currthread (thread_num
);
2862 p
= (unsigned char *) p_temp
;
2870 warning ("Malformed packet(b) (missing colon): %s\n\
2874 if (regno
>= NUM_REGS
)
2875 warning ("Remote sent bad register number %ld: %s\n\
2879 if (hex2bin (p
, regs
, REGISTER_RAW_SIZE (regno
))
2880 < REGISTER_RAW_SIZE (regno
))
2881 warning ("Remote reply is too short: %s", buf
);
2882 supply_register (regno
, regs
);
2887 warning ("Remote register badly formatted: %s", buf
);
2888 warning (" here: %s", p
);
2893 case 'S': /* Old style status, just signal only */
2894 status
->kind
= TARGET_WAITKIND_STOPPED
;
2895 status
->value
.sig
= (enum target_signal
)
2896 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2900 /* Export Cisco kernel mode as a convenience variable
2901 (so that it can be used in the GDB prompt if desired). */
2903 if (cisco_kernel_mode
== 1)
2904 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2905 value_from_string ("PDEBUG-"));
2906 cisco_kernel_mode
= 0;
2907 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2908 record_currthread (thread_num
);
2910 else if (buf
[3] == 'k')
2912 /* Export Cisco kernel mode as a convenience variable
2913 (so that it can be used in the GDB prompt if desired). */
2915 if (cisco_kernel_mode
== 1)
2916 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2917 value_from_string ("KDEBUG-"));
2918 cisco_kernel_mode
= 1;
2921 case 'N': /* Cisco special: status and offsets */
2923 bfd_vma text_addr
, data_addr
, bss_addr
;
2924 bfd_signed_vma text_off
, data_off
, bss_off
;
2927 status
->kind
= TARGET_WAITKIND_STOPPED
;
2928 status
->value
.sig
= (enum target_signal
)
2929 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2931 if (symfile_objfile
== NULL
)
2933 warning ("Relocation packet received with no symbol file. \
2938 /* Relocate object file. Buffer format is NAATT;DD;BB
2939 * where AA is the signal number, TT is the new text
2940 * address, DD * is the new data address, and BB is the
2941 * new bss address. */
2944 text_addr
= strtoul (p
, (char **) &p1
, 16);
2945 if (p1
== p
|| *p1
!= ';')
2946 warning ("Malformed relocation packet: Packet '%s'", buf
);
2948 data_addr
= strtoul (p
, (char **) &p1
, 16);
2949 if (p1
== p
|| *p1
!= ';')
2950 warning ("Malformed relocation packet: Packet '%s'", buf
);
2952 bss_addr
= strtoul (p
, (char **) &p1
, 16);
2954 warning ("Malformed relocation packet: Packet '%s'", buf
);
2956 if (remote_cisco_section_offsets (text_addr
, data_addr
, bss_addr
,
2957 &text_off
, &data_off
, &bss_off
)
2959 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
2960 remote_cisco_objfile_relocate (text_off
, data_off
, bss_off
);
2964 case 'W': /* Target exited */
2966 /* The remote process exited. */
2967 status
->kind
= TARGET_WAITKIND_EXITED
;
2968 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
2972 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
2973 status
->value
.sig
= (enum target_signal
)
2974 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2978 case 'O': /* Console output */
2979 remote_console_output (buf
+ 1);
2982 if (last_sent_signal
!= TARGET_SIGNAL_0
)
2984 /* Zero length reply means that we tried 'S' or 'C' and
2985 the remote system doesn't support it. */
2986 target_terminal_ours_for_output ();
2988 ("Can't send signals to this remote system. %s not sent.\n",
2989 target_signal_to_name (last_sent_signal
));
2990 last_sent_signal
= TARGET_SIGNAL_0
;
2991 target_terminal_inferior ();
2993 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
2994 putpkt ((char *) buf
);
2997 /* else fallthrough */
2999 warning ("Invalid remote reply: %s", buf
);
3004 if (thread_num
!= -1)
3006 return pid_to_ptid (thread_num
);
3008 return inferior_ptid
;
3011 /* Async version of remote_wait. */
3013 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3015 unsigned char *buf
= alloca (PBUFSIZ
);
3016 int thread_num
= -1;
3018 status
->kind
= TARGET_WAITKIND_EXITED
;
3019 status
->value
.integer
= 0;
3025 if (!target_is_async_p ())
3026 ofunc
= signal (SIGINT
, remote_interrupt
);
3027 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3028 _never_ wait for ever -> test on target_is_async_p().
3029 However, before we do that we need to ensure that the caller
3030 knows how to take the target into/out of async mode. */
3031 getpkt (buf
, PBUFSIZ
, wait_forever_enabled_p
);
3032 if (!target_is_async_p ())
3033 signal (SIGINT
, ofunc
);
3035 /* This is a hook for when we need to do something (perhaps the
3036 collection of trace data) every time the target stops. */
3037 if (target_wait_loop_hook
)
3038 (*target_wait_loop_hook
) ();
3042 case 'E': /* Error of some sort */
3043 warning ("Remote failure reply: %s", buf
);
3045 case 'T': /* Status with PC, SP, FP, ... */
3049 char* regs
= (char*) alloca (MAX_REGISTER_RAW_SIZE
);
3051 /* Expedited reply, containing Signal, {regno, reg} repeat */
3052 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3054 n... = register number
3055 r... = register contents
3057 p
= &buf
[3]; /* after Txx */
3064 /* Read the register number */
3065 regno
= strtol ((const char *) p
, &p_temp
, 16);
3066 p1
= (unsigned char *) p_temp
;
3068 if (p1
== p
) /* No register number present here */
3070 p1
= (unsigned char *) strchr ((const char *) p
, ':');
3072 warning ("Malformed packet(a) (missing colon): %s\n\
3075 if (strncmp ((const char *) p
, "thread", p1
- p
) == 0)
3077 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3078 record_currthread (thread_num
);
3079 p
= (unsigned char *) p_temp
;
3087 warning ("Malformed packet(b) (missing colon): %s\n\
3091 if (regno
>= NUM_REGS
)
3092 warning ("Remote sent bad register number %ld: %s\n\
3096 if (hex2bin (p
, regs
, REGISTER_RAW_SIZE (regno
))
3097 < REGISTER_RAW_SIZE (regno
))
3098 warning ("Remote reply is too short: %s", buf
);
3099 supply_register (regno
, regs
);
3104 warning ("Remote register badly formatted: %s", buf
);
3105 warning (" here: %s", p
);
3110 case 'S': /* Old style status, just signal only */
3111 status
->kind
= TARGET_WAITKIND_STOPPED
;
3112 status
->value
.sig
= (enum target_signal
)
3113 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3117 /* Export Cisco kernel mode as a convenience variable
3118 (so that it can be used in the GDB prompt if desired). */
3120 if (cisco_kernel_mode
== 1)
3121 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3122 value_from_string ("PDEBUG-"));
3123 cisco_kernel_mode
= 0;
3124 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3125 record_currthread (thread_num
);
3127 else if (buf
[3] == 'k')
3129 /* Export Cisco kernel mode as a convenience variable
3130 (so that it can be used in the GDB prompt if desired). */
3132 if (cisco_kernel_mode
== 1)
3133 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3134 value_from_string ("KDEBUG-"));
3135 cisco_kernel_mode
= 1;
3138 case 'N': /* Cisco special: status and offsets */
3140 bfd_vma text_addr
, data_addr
, bss_addr
;
3141 bfd_signed_vma text_off
, data_off
, bss_off
;
3144 status
->kind
= TARGET_WAITKIND_STOPPED
;
3145 status
->value
.sig
= (enum target_signal
)
3146 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3148 if (symfile_objfile
== NULL
)
3150 warning ("Relocation packet recieved with no symbol file. \
3155 /* Relocate object file. Buffer format is NAATT;DD;BB
3156 * where AA is the signal number, TT is the new text
3157 * address, DD * is the new data address, and BB is the
3158 * new bss address. */
3161 text_addr
= strtoul (p
, (char **) &p1
, 16);
3162 if (p1
== p
|| *p1
!= ';')
3163 warning ("Malformed relocation packet: Packet '%s'", buf
);
3165 data_addr
= strtoul (p
, (char **) &p1
, 16);
3166 if (p1
== p
|| *p1
!= ';')
3167 warning ("Malformed relocation packet: Packet '%s'", buf
);
3169 bss_addr
= strtoul (p
, (char **) &p1
, 16);
3171 warning ("Malformed relocation packet: Packet '%s'", buf
);
3173 if (remote_cisco_section_offsets (text_addr
, data_addr
, bss_addr
,
3174 &text_off
, &data_off
, &bss_off
)
3176 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
3177 remote_cisco_objfile_relocate (text_off
, data_off
, bss_off
);
3181 case 'W': /* Target exited */
3183 /* The remote process exited. */
3184 status
->kind
= TARGET_WAITKIND_EXITED
;
3185 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3189 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3190 status
->value
.sig
= (enum target_signal
)
3191 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3195 case 'O': /* Console output */
3196 remote_console_output (buf
+ 1);
3197 /* Return immediately to the event loop. The event loop will
3198 still be waiting on the inferior afterwards. */
3199 status
->kind
= TARGET_WAITKIND_IGNORE
;
3202 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3204 /* Zero length reply means that we tried 'S' or 'C' and
3205 the remote system doesn't support it. */
3206 target_terminal_ours_for_output ();
3208 ("Can't send signals to this remote system. %s not sent.\n",
3209 target_signal_to_name (last_sent_signal
));
3210 last_sent_signal
= TARGET_SIGNAL_0
;
3211 target_terminal_inferior ();
3213 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3214 putpkt ((char *) buf
);
3217 /* else fallthrough */
3219 warning ("Invalid remote reply: %s", buf
);
3224 if (thread_num
!= -1)
3226 return pid_to_ptid (thread_num
);
3228 return inferior_ptid
;
3231 /* Number of bytes of registers this stub implements. */
3233 static int register_bytes_found
;
3235 /* Read the remote registers into the block REGS. */
3236 /* Currently we just read all the registers, so we don't use regno. */
3240 remote_fetch_registers (int regno
)
3242 char *buf
= alloca (PBUFSIZ
);
3245 char *regs
= alloca (REGISTER_BYTES
);
3247 set_thread (PIDGET (inferior_ptid
), 1);
3250 remote_send (buf
, PBUFSIZ
);
3252 /* Save the size of the packet sent to us by the target. Its used
3253 as a heuristic when determining the max size of packets that the
3254 target can safely receive. */
3255 if (actual_register_packet_size
== 0)
3256 actual_register_packet_size
= strlen (buf
);
3258 /* Unimplemented registers read as all bits zero. */
3259 memset (regs
, 0, REGISTER_BYTES
);
3261 /* We can get out of synch in various cases. If the first character
3262 in the buffer is not a hex character, assume that has happened
3263 and try to fetch another packet to read. */
3264 while ((buf
[0] < '0' || buf
[0] > '9')
3265 && (buf
[0] < 'a' || buf
[0] > 'f')
3266 && buf
[0] != 'x') /* New: unavailable register value */
3269 fprintf_unfiltered (gdb_stdlog
,
3270 "Bad register packet; fetching a new packet\n");
3271 getpkt (buf
, PBUFSIZ
, 0);
3274 /* Reply describes registers byte by byte, each byte encoded as two
3275 hex characters. Suck them all up, then supply them to the
3276 register cacheing/storage mechanism. */
3279 for (i
= 0; i
< REGISTER_BYTES
; i
++)
3285 warning ("Remote reply is of odd length: %s", buf
);
3286 /* Don't change register_bytes_found in this case, and don't
3287 print a second warning. */
3290 if (p
[0] == 'x' && p
[1] == 'x')
3291 regs
[i
] = 0; /* 'x' */
3293 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3297 if (i
!= register_bytes_found
)
3299 register_bytes_found
= i
;
3300 if (REGISTER_BYTES_OK_P ()
3301 && !REGISTER_BYTES_OK (i
))
3302 warning ("Remote reply is too short: %s", buf
);
3306 for (i
= 0; i
< NUM_REGS
; i
++)
3308 supply_register (i
, ®s
[REGISTER_BYTE (i
)]);
3309 if (buf
[REGISTER_BYTE (i
) * 2] == 'x')
3310 set_register_cached (i
, -1);
3314 /* Prepare to store registers. Since we may send them all (using a
3315 'G' request), we have to read out the ones we don't want to change
3319 remote_prepare_to_store (void)
3321 /* Make sure the entire registers array is valid. */
3322 switch (remote_protocol_P
.support
)
3324 case PACKET_DISABLE
:
3325 case PACKET_SUPPORT_UNKNOWN
:
3326 read_register_bytes (0, (char *) NULL
, REGISTER_BYTES
);
3333 /* Helper: Attempt to store REGNO using the P packet. Return fail IFF
3334 packet was not recognized. */
3337 store_register_using_P (int regno
)
3339 /* Try storing a single register. */
3340 char *buf
= alloca (PBUFSIZ
);
3345 sprintf (buf
, "P%x=", regno
);
3346 p
= buf
+ strlen (buf
);
3347 regp
= register_buffer (regno
);
3348 bin2hex (regp
, p
, REGISTER_RAW_SIZE (regno
));
3349 remote_send (buf
, PBUFSIZ
);
3351 return buf
[0] != '\0';
3355 /* Store register REGNO, or all registers if REGNO == -1, from the contents
3356 of the register cache buffer. FIXME: ignores errors. */
3359 remote_store_registers (int regno
)
3361 char *buf
= alloca (PBUFSIZ
);
3366 set_thread (PIDGET (inferior_ptid
), 1);
3370 switch (remote_protocol_P
.support
)
3372 case PACKET_DISABLE
:
3375 if (store_register_using_P (regno
))
3378 error ("Protocol error: P packet not recognized by stub");
3379 case PACKET_SUPPORT_UNKNOWN
:
3380 if (store_register_using_P (regno
))
3382 /* The stub recognized the 'P' packet. Remember this. */
3383 remote_protocol_P
.support
= PACKET_ENABLE
;
3388 /* The stub does not support the 'P' packet. Use 'G'
3389 instead, and don't try using 'P' in the future (it
3390 will just waste our time). */
3391 remote_protocol_P
.support
= PACKET_DISABLE
;
3399 /* Command describes registers byte by byte,
3400 each byte encoded as two hex characters. */
3402 regs
= register_buffer (-1);
3404 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3405 bin2hex (regs
, p
, register_bytes_found
);
3406 remote_send (buf
, PBUFSIZ
);
3410 /* Return the number of hex digits in num. */
3413 hexnumlen (ULONGEST num
)
3417 for (i
= 0; num
!= 0; i
++)
3423 /* Set BUF to the minimum number of hex digits representing NUM. */
3426 hexnumstr (char *buf
, ULONGEST num
)
3428 int len
= hexnumlen (num
);
3429 return hexnumnstr (buf
, num
, len
);
3433 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3436 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3442 for (i
= width
- 1; i
>= 0; i
--)
3444 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3451 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3454 remote_address_masked (CORE_ADDR addr
)
3456 if (remote_address_size
> 0
3457 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3459 /* Only create a mask when that mask can safely be constructed
3460 in a ULONGEST variable. */
3462 mask
= (mask
<< remote_address_size
) - 1;
3468 /* Determine whether the remote target supports binary downloading.
3469 This is accomplished by sending a no-op memory write of zero length
3470 to the target at the specified address. It does not suffice to send
3471 the whole packet, since many stubs strip the eighth bit and subsequently
3472 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3474 NOTE: This can still lose if the serial line is not eight-bit
3475 clean. In cases like this, the user should clear "remote
3479 check_binary_download (CORE_ADDR addr
)
3481 switch (remote_protocol_binary_download
.support
)
3483 case PACKET_DISABLE
:
3487 case PACKET_SUPPORT_UNKNOWN
:
3489 char *buf
= alloca (PBUFSIZ
);
3494 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3496 p
+= hexnumstr (p
, (ULONGEST
) 0);
3500 putpkt_binary (buf
, (int) (p
- buf
));
3501 getpkt (buf
, PBUFSIZ
, 0);
3506 fprintf_unfiltered (gdb_stdlog
,
3507 "binary downloading NOT suppported by target\n");
3508 remote_protocol_binary_download
.support
= PACKET_DISABLE
;
3513 fprintf_unfiltered (gdb_stdlog
,
3514 "binary downloading suppported by target\n");
3515 remote_protocol_binary_download
.support
= PACKET_ENABLE
;
3522 /* Write memory data directly to the remote machine.
3523 This does not inform the data cache; the data cache uses this.
3524 MEMADDR is the address in the remote memory space.
3525 MYADDR is the address of the buffer in our space.
3526 LEN is the number of bytes.
3528 Returns number of bytes transferred, or 0 (setting errno) for
3529 error. Only transfer a single packet. */
3532 remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3535 int max_buf_size
; /* Max size of packet output buffer */
3537 unsigned char *plen
;
3543 /* Verify that the target can support a binary download */
3544 check_binary_download (memaddr
);
3546 /* Determine the max packet size. */
3547 max_buf_size
= get_memory_write_packet_size ();
3548 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3549 buf
= alloca (sizeof_buf
);
3551 /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */
3552 max_buf_size
-= 2 + hexnumlen (memaddr
+ len
- 1) + 1 + hexnumlen (len
) + 4;
3554 /* construct "M"<memaddr>","<len>":" */
3555 /* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */
3558 /* Append [XM]. Compute a best guess of the number of bytes
3559 actually transfered. */
3560 switch (remote_protocol_binary_download
.support
)
3564 /* Best guess at number of bytes that will fit. */
3565 todo
= min (len
, max_buf_size
);
3567 case PACKET_DISABLE
:
3569 /* num bytes that will fit */
3570 todo
= min (len
, max_buf_size
/ 2);
3572 case PACKET_SUPPORT_UNKNOWN
:
3573 internal_error (__FILE__
, __LINE__
,
3574 "remote_write_bytes: bad internal state");
3576 internal_error (__FILE__
, __LINE__
, "bad switch");
3579 /* Append <memaddr> */
3580 memaddr
= remote_address_masked (memaddr
);
3581 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3584 /* Append <len>. Retain the location/size of <len>. It may
3585 need to be adjusted once the packet body has been created. */
3587 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
3592 /* Append the packet body. */
3593 switch (remote_protocol_binary_download
.support
)
3596 /* Binary mode. Send target system values byte by byte, in
3597 increasing byte addresses. Only escape certain critical
3600 (nr_bytes
< todo
) && (p
- buf
) < (max_buf_size
- 2);
3603 switch (myaddr
[nr_bytes
] & 0xff)
3608 /* These must be escaped */
3610 *p
++ = (myaddr
[nr_bytes
] & 0xff) ^ 0x20;
3613 *p
++ = myaddr
[nr_bytes
] & 0xff;
3617 if (nr_bytes
< todo
)
3619 /* Escape chars have filled up the buffer prematurely,
3620 and we have actually sent fewer bytes than planned.
3621 Fix-up the length field of the packet. Use the same
3622 number of characters as before. */
3624 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
3625 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
3628 case PACKET_DISABLE
:
3629 /* Normal mode: Send target system values byte by byte, in
3630 increasing byte addresses. Each byte is encoded as a two hex
3632 bin2hex (myaddr
, p
, todo
);
3635 case PACKET_SUPPORT_UNKNOWN
:
3636 internal_error (__FILE__
, __LINE__
,
3637 "remote_write_bytes: bad internal state");
3639 internal_error (__FILE__
, __LINE__
, "bad switch");
3642 putpkt_binary (buf
, (int) (p
- buf
));
3643 getpkt (buf
, sizeof_buf
, 0);
3647 /* There is no correspondance between what the remote protocol
3648 uses for errors and errno codes. We would like a cleaner way
3649 of representing errors (big enough to include errno codes,
3650 bfd_error codes, and others). But for now just return EIO. */
3655 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3656 bytes than we'd planned. */
3660 /* Read memory data directly from the remote machine.
3661 This does not use the data cache; the data cache uses this.
3662 MEMADDR is the address in the remote memory space.
3663 MYADDR is the address of the buffer in our space.
3664 LEN is the number of bytes.
3666 Returns number of bytes transferred, or 0 for error. */
3668 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3669 remote targets) shouldn't attempt to read the entire buffer.
3670 Instead it should read a single packet worth of data and then
3671 return the byte size of that packet to the caller. The caller (its
3672 caller and its callers caller ;-) already contains code for
3673 handling partial reads. */
3676 remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3679 int max_buf_size
; /* Max size of packet output buffer */
3683 /* Create a buffer big enough for this packet. */
3684 max_buf_size
= get_memory_read_packet_size ();
3685 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3686 buf
= alloca (sizeof_buf
);
3695 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
3697 /* construct "m"<memaddr>","<len>" */
3698 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3699 memaddr
= remote_address_masked (memaddr
);
3702 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3704 p
+= hexnumstr (p
, (ULONGEST
) todo
);
3708 getpkt (buf
, sizeof_buf
, 0);
3712 /* There is no correspondance between what the remote protocol uses
3713 for errors and errno codes. We would like a cleaner way of
3714 representing errors (big enough to include errno codes, bfd_error
3715 codes, and others). But for now just return EIO. */
3720 /* Reply describes memory byte by byte,
3721 each byte encoded as two hex characters. */
3724 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
3726 /* Reply is short. This means that we were able to read
3727 only part of what we wanted to. */
3728 return i
+ (origlen
- len
);
3737 /* Read or write LEN bytes from inferior memory at MEMADDR,
3738 transferring to or from debugger address BUFFER. Write to inferior if
3739 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3740 for error. TARGET is unused. */
3744 remote_xfer_memory (CORE_ADDR mem_addr
, char *buffer
, int mem_len
,
3746 struct mem_attrib
*attrib ATTRIBUTE_UNUSED
,
3747 struct target_ops
*target
)
3749 CORE_ADDR targ_addr
;
3753 REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr
, mem_len
, &targ_addr
, &targ_len
);
3758 res
= remote_write_bytes (targ_addr
, buffer
, targ_len
);
3760 res
= remote_read_bytes (targ_addr
, buffer
, targ_len
);
3767 /* Enable after 4.12. */
3770 remote_search (int len
, char *data
, char *mask
, CORE_ADDR startaddr
,
3771 int increment
, CORE_ADDR lorange
, CORE_ADDR hirange
,
3772 CORE_ADDR
*addr_found
, char *data_found
)
3774 if (increment
== -4 && len
== 4)
3776 long mask_long
, data_long
;
3777 long data_found_long
;
3778 CORE_ADDR addr_we_found
;
3779 char *buf
= alloca (PBUFSIZ
);
3780 long returned_long
[2];
3783 mask_long
= extract_unsigned_integer (mask
, len
);
3784 data_long
= extract_unsigned_integer (data
, len
);
3785 sprintf (buf
, "t%x:%x,%x", startaddr
, data_long
, mask_long
);
3787 getpkt (buf
, PBUFSIZ
, 0);
3790 /* The stub doesn't support the 't' request. We might want to
3791 remember this fact, but on the other hand the stub could be
3792 switched on us. Maybe we should remember it only until
3793 the next "target remote". */
3794 generic_search (len
, data
, mask
, startaddr
, increment
, lorange
,
3795 hirange
, addr_found
, data_found
);
3800 /* There is no correspondance between what the remote protocol uses
3801 for errors and errno codes. We would like a cleaner way of
3802 representing errors (big enough to include errno codes, bfd_error
3803 codes, and others). But for now just use EIO. */
3804 memory_error (EIO
, startaddr
);
3807 while (*p
!= '\0' && *p
!= ',')
3808 addr_we_found
= (addr_we_found
<< 4) + fromhex (*p
++);
3810 error ("Protocol error: short return for search");
3812 data_found_long
= 0;
3813 while (*p
!= '\0' && *p
!= ',')
3814 data_found_long
= (data_found_long
<< 4) + fromhex (*p
++);
3815 /* Ignore anything after this comma, for future extensions. */
3817 if (addr_we_found
< lorange
|| addr_we_found
>= hirange
)
3823 *addr_found
= addr_we_found
;
3824 *data_found
= store_unsigned_integer (data_we_found
, len
);
3827 generic_search (len
, data
, mask
, startaddr
, increment
, lorange
,
3828 hirange
, addr_found
, data_found
);
3833 remote_files_info (struct target_ops
*ignore
)
3835 puts_filtered ("Debugging a target over a serial line.\n");
3838 /* Stuff for dealing with the packets which are part of this protocol.
3839 See comment at top of file for details. */
3841 /* Read a single character from the remote end, masking it down to 7 bits. */
3844 readchar (int timeout
)
3848 ch
= SERIAL_READCHAR (remote_desc
, timeout
);
3853 switch ((enum serial_rc
) ch
)
3856 target_mourn_inferior ();
3857 error ("Remote connection closed");
3860 perror_with_name ("Remote communication error");
3862 case SERIAL_TIMEOUT
:
3868 /* Send the command in BUF to the remote machine, and read the reply
3869 into BUF. Report an error if we get an error reply. */
3872 remote_send (char *buf
,
3876 getpkt (buf
, sizeof_buf
, 0);
3879 error ("Remote failure reply: %s", buf
);
3882 /* Display a null-terminated packet on stdout, for debugging, using C
3886 print_packet (char *buf
)
3888 puts_filtered ("\"");
3889 fputstr_filtered (buf
, '"', gdb_stdout
);
3890 puts_filtered ("\"");
3896 return putpkt_binary (buf
, strlen (buf
));
3899 /* Send a packet to the remote machine, with error checking. The data
3900 of the packet is in BUF. The string in BUF can be at most PBUFSIZ - 5
3901 to account for the $, # and checksum, and for a possible /0 if we are
3902 debugging (remote_debug) and want to print the sent packet as a string */
3905 putpkt_binary (char *buf
, int cnt
)
3908 unsigned char csum
= 0;
3909 char *buf2
= alloca (cnt
+ 6);
3910 long sizeof_junkbuf
= PBUFSIZ
;
3911 char *junkbuf
= alloca (sizeof_junkbuf
);
3917 /* Copy the packet into buffer BUF2, encapsulating it
3918 and giving it a checksum. */
3923 for (i
= 0; i
< cnt
; i
++)
3929 *p
++ = tohex ((csum
>> 4) & 0xf);
3930 *p
++ = tohex (csum
& 0xf);
3932 /* Send it over and over until we get a positive ack. */
3936 int started_error_output
= 0;
3941 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
3942 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
3943 fprintf_unfiltered (gdb_stdlog
, "...");
3944 gdb_flush (gdb_stdlog
);
3946 if (SERIAL_WRITE (remote_desc
, buf2
, p
- buf2
))
3947 perror_with_name ("putpkt: write failed");
3949 /* read until either a timeout occurs (-2) or '+' is read */
3952 ch
= readchar (remote_timeout
);
3960 case SERIAL_TIMEOUT
:
3962 if (started_error_output
)
3964 putchar_unfiltered ('\n');
3965 started_error_output
= 0;
3974 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
3978 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
3979 case SERIAL_TIMEOUT
:
3983 break; /* Retransmit buffer */
3987 fprintf_unfiltered (gdb_stdlog
, "Packet instead of Ack, ignoring it\n");
3988 /* It's probably an old response, and we're out of sync.
3989 Just gobble up the packet and ignore it. */
3990 read_frame (junkbuf
, sizeof_junkbuf
);
3991 continue; /* Now, go look for + */
3996 if (!started_error_output
)
3998 started_error_output
= 1;
3999 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
4001 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
4005 break; /* Here to retransmit */
4009 /* This is wrong. If doing a long backtrace, the user should be
4010 able to get out next time we call QUIT, without anything as
4011 violent as interrupt_query. If we want to provide a way out of
4012 here without getting to the next QUIT, it should be based on
4013 hitting ^C twice as in remote_wait. */
4023 static int remote_cisco_mode
;
4025 /* Come here after finding the start of the frame. Collect the rest
4026 into BUF, verifying the checksum, length, and handling run-length
4027 compression. No more than sizeof_buf-1 characters are read so that
4028 the buffer can be NUL terminated.
4030 Returns -1 on error, number of characters in buffer (ignoring the
4031 trailing NULL) on success. (could be extended to return one of the
4032 SERIAL status indications). */
4035 read_frame (char *buf
,
4047 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
4048 c
= readchar (remote_timeout
);
4051 case SERIAL_TIMEOUT
:
4053 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4057 fputs_filtered ("Saw new packet start in middle of old one\n",
4059 return -1; /* Start a new packet, count retries */
4062 unsigned char pktcsum
;
4068 check_0
= readchar (remote_timeout
);
4070 check_1
= readchar (remote_timeout
);
4072 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4075 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog
);
4078 else if (check_0
< 0 || check_1
< 0)
4081 fputs_filtered ("Communication error in checksum\n", gdb_stdlog
);
4085 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4086 if (csum
== pktcsum
)
4091 fprintf_filtered (gdb_stdlog
,
4092 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4094 fputs_filtered (buf
, gdb_stdlog
);
4095 fputs_filtered ("\n", gdb_stdlog
);
4097 /* Number of characters in buffer ignoring trailing
4101 case '*': /* Run length encoding */
4106 if (remote_cisco_mode
== 0)
4108 c
= readchar (remote_timeout
);
4110 repeat
= c
- ' ' + 3; /* Compute repeat count */
4114 /* Cisco's run-length encoding variant uses two
4115 hex chars to represent the repeat count. */
4117 c
= readchar (remote_timeout
);
4119 repeat
= fromhex (c
) << 4;
4120 c
= readchar (remote_timeout
);
4122 repeat
+= fromhex (c
);
4125 /* The character before ``*'' is repeated. */
4127 if (repeat
> 0 && repeat
<= 255
4129 && bc
+ repeat
< sizeof_buf
- 1)
4131 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4137 printf_filtered ("Repeat count %d too large for buffer: ", repeat
);
4138 puts_filtered (buf
);
4139 puts_filtered ("\n");
4143 if (bc
< sizeof_buf
- 1)
4151 puts_filtered ("Remote packet too long: ");
4152 puts_filtered (buf
);
4153 puts_filtered ("\n");
4160 /* Read a packet from the remote machine, with error checking, and
4161 store it in BUF. If FOREVER, wait forever rather than timing out;
4162 this is used (in synchronous mode) to wait for a target that is is
4163 executing user code to stop. */
4164 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4165 don't have to change all the calls to getpkt to deal with the
4166 return value, because at the moment I don't know what the right
4167 thing to do it for those. */
4175 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4179 /* Read a packet from the remote machine, with error checking, and
4180 store it in BUF. If FOREVER, wait forever rather than timing out;
4181 this is used (in synchronous mode) to wait for a target that is is
4182 executing user code to stop. If FOREVER == 0, this function is
4183 allowed to time out gracefully and return an indication of this to
4186 getpkt_sane (char *buf
,
4195 strcpy (buf
, "timeout");
4199 timeout
= watchdog
> 0 ? watchdog
: -1;
4203 timeout
= remote_timeout
;
4207 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4209 /* This can loop forever if the remote side sends us characters
4210 continuously, but if it pauses, we'll get a zero from readchar
4211 because of timeout. Then we'll count that as a retry. */
4213 /* Note that we will only wait forever prior to the start of a packet.
4214 After that, we expect characters to arrive at a brisk pace. They
4215 should show up within remote_timeout intervals. */
4219 c
= readchar (timeout
);
4221 if (c
== SERIAL_TIMEOUT
)
4223 if (forever
) /* Watchdog went off? Kill the target. */
4226 target_mourn_inferior ();
4227 error ("Watchdog has expired. Target detached.\n");
4230 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4236 /* We've found the start of a packet, now collect the data. */
4238 val
= read_frame (buf
, sizeof_buf
);
4244 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4245 fputstr_unfiltered (buf
, 0, gdb_stdlog
);
4246 fprintf_unfiltered (gdb_stdlog
, "\n");
4248 SERIAL_WRITE (remote_desc
, "+", 1);
4252 /* Try the whole thing again. */
4254 SERIAL_WRITE (remote_desc
, "-", 1);
4257 /* We have tried hard enough, and just can't receive the packet. Give up. */
4259 printf_unfiltered ("Ignoring packet error, continuing...\n");
4260 SERIAL_WRITE (remote_desc
, "+", 1);
4267 /* For some mysterious reason, wait_for_inferior calls kill instead of
4268 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4272 target_mourn_inferior ();
4276 /* Use catch_errors so the user can quit from gdb even when we aren't on
4277 speaking terms with the remote system. */
4278 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4280 /* Don't wait for it to die. I'm not really sure it matters whether
4281 we do or not. For the existing stubs, kill is a noop. */
4282 target_mourn_inferior ();
4285 /* Async version of remote_kill. */
4287 remote_async_kill (void)
4289 /* Unregister the file descriptor from the event loop. */
4290 if (target_is_async_p ())
4291 SERIAL_ASYNC (remote_desc
, NULL
, 0);
4293 /* For some mysterious reason, wait_for_inferior calls kill instead of
4294 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4298 target_mourn_inferior ();
4302 /* Use catch_errors so the user can quit from gdb even when we aren't on
4303 speaking terms with the remote system. */
4304 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4306 /* Don't wait for it to die. I'm not really sure it matters whether
4307 we do or not. For the existing stubs, kill is a noop. */
4308 target_mourn_inferior ();
4314 remote_mourn_1 (&remote_ops
);
4318 remote_async_mourn (void)
4320 remote_mourn_1 (&remote_async_ops
);
4324 extended_remote_mourn (void)
4326 /* We do _not_ want to mourn the target like this; this will
4327 remove the extended remote target from the target stack,
4328 and the next time the user says "run" it'll fail.
4330 FIXME: What is the right thing to do here? */
4332 remote_mourn_1 (&extended_remote_ops
);
4336 /* Worker function for remote_mourn. */
4338 remote_mourn_1 (struct target_ops
*target
)
4340 unpush_target (target
);
4341 generic_mourn_inferior ();
4344 /* In the extended protocol we want to be able to do things like
4345 "run" and have them basically work as expected. So we need
4346 a special create_inferior function.
4348 FIXME: One day add support for changing the exec file
4349 we're debugging, arguments and an environment. */
4352 extended_remote_create_inferior (char *exec_file
, char *args
, char **env
)
4354 /* Rip out the breakpoints; we'll reinsert them after restarting
4355 the remote server. */
4356 remove_breakpoints ();
4358 /* Now restart the remote server. */
4359 extended_remote_restart ();
4361 /* Now put the breakpoints back in. This way we're safe if the
4362 restart function works via a unix fork on the remote side. */
4363 insert_breakpoints ();
4365 /* Clean up from the last time we were running. */
4366 clear_proceed_status ();
4368 /* Let the remote process run. */
4369 proceed (-1, TARGET_SIGNAL_0
, 0);
4372 /* Async version of extended_remote_create_inferior. */
4374 extended_remote_async_create_inferior (char *exec_file
, char *args
, char **env
)
4376 /* Rip out the breakpoints; we'll reinsert them after restarting
4377 the remote server. */
4378 remove_breakpoints ();
4380 /* If running asynchronously, register the target file descriptor
4381 with the event loop. */
4382 if (event_loop_p
&& target_can_async_p ())
4383 target_async (inferior_event_handler
, 0);
4385 /* Now restart the remote server. */
4386 extended_remote_restart ();
4388 /* Now put the breakpoints back in. This way we're safe if the
4389 restart function works via a unix fork on the remote side. */
4390 insert_breakpoints ();
4392 /* Clean up from the last time we were running. */
4393 clear_proceed_status ();
4395 /* Let the remote process run. */
4396 proceed (-1, TARGET_SIGNAL_0
, 0);
4400 /* On some machines, e.g. 68k, we may use a different breakpoint instruction
4401 than other targets; in those use REMOTE_BREAKPOINT instead of just
4402 BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
4403 and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call
4404 the standard routines that are in mem-break.c. */
4406 /* FIXME, these ought to be done in a more dynamic fashion. For instance,
4407 the choice of breakpoint instruction affects target program design and
4408 vice versa, and by making it user-tweakable, the special code here
4409 goes away and we need fewer special GDB configurations. */
4411 #if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT)
4412 #define REMOTE_BREAKPOINT
4415 #ifdef REMOTE_BREAKPOINT
4417 /* If the target isn't bi-endian, just pretend it is. */
4418 #if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT)
4419 #define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4420 #define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4423 static unsigned char big_break_insn
[] = BIG_REMOTE_BREAKPOINT
;
4424 static unsigned char little_break_insn
[] = LITTLE_REMOTE_BREAKPOINT
;
4426 #endif /* REMOTE_BREAKPOINT */
4428 /* Insert a breakpoint on targets that don't have any better breakpoint
4429 support. We read the contents of the target location and stash it,
4430 then overwrite it with a breakpoint instruction. ADDR is the target
4431 location in the target machine. CONTENTS_CACHE is a pointer to
4432 memory allocated for saving the target contents. It is guaranteed
4433 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
4434 is accomplished via BREAKPOINT_MAX). */
4437 remote_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4439 #ifdef REMOTE_BREAKPOINT
4444 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4445 If it succeeds, then set the support to PACKET_ENABLE. If it
4446 fails, and the user has explicitly requested the Z support then
4447 report an error, otherwise, mark it disabled and go on. */
4449 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4451 char *buf
= alloca (PBUFSIZ
);
4454 addr
= remote_address_masked (addr
);
4458 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4459 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4460 sprintf (p
, ",%d", bp_size
);
4463 getpkt (buf
, PBUFSIZ
, 0);
4465 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]))
4471 case PACKET_UNKNOWN
:
4476 #ifdef REMOTE_BREAKPOINT
4477 val
= target_read_memory (addr
, contents_cache
, sizeof big_break_insn
);
4481 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
4482 val
= target_write_memory (addr
, (char *) big_break_insn
,
4483 sizeof big_break_insn
);
4485 val
= target_write_memory (addr
, (char *) little_break_insn
,
4486 sizeof little_break_insn
);
4491 return memory_insert_breakpoint (addr
, contents_cache
);
4492 #endif /* REMOTE_BREAKPOINT */
4496 remote_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4500 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4502 char *buf
= alloca (PBUFSIZ
);
4509 addr
= remote_address_masked (addr
);
4510 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4511 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4512 sprintf (p
, ",%d", bp_size
);
4515 getpkt (buf
, PBUFSIZ
, 0);
4517 return (buf
[0] == 'E');
4520 #ifdef REMOTE_BREAKPOINT
4521 return target_write_memory (addr
, contents_cache
, sizeof big_break_insn
);
4523 return memory_remove_breakpoint (addr
, contents_cache
);
4524 #endif /* REMOTE_BREAKPOINT */
4528 watchpoint_to_Z_packet (int type
)
4542 internal_error (__FILE__
, __LINE__
,
4543 "hw_bp_to_z: bad watchpoint type %d", type
);
4547 /* FIXME: This function should be static and a member of the remote
4551 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
4553 char *buf
= alloca (PBUFSIZ
);
4555 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4557 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4558 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4559 remote_protocol_Z
[packet
].name
,
4560 remote_protocol_Z
[packet
].title
);
4562 sprintf (buf
, "Z%x,", packet
);
4563 p
= strchr (buf
, '\0');
4564 addr
= remote_address_masked (addr
);
4565 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4566 sprintf (p
, ",%x", len
);
4569 getpkt (buf
, PBUFSIZ
, 0);
4571 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4574 case PACKET_UNKNOWN
:
4579 internal_error (__FILE__
, __LINE__
,
4580 "remote_insert_watchpoint: reached end of function");
4583 /* FIXME: This function should be static and a member of the remote
4587 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
4589 char *buf
= alloca (PBUFSIZ
);
4591 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4593 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4594 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4595 remote_protocol_Z
[packet
].name
,
4596 remote_protocol_Z
[packet
].title
);
4598 sprintf (buf
, "z%x,", packet
);
4599 p
= strchr (buf
, '\0');
4600 addr
= remote_address_masked (addr
);
4601 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4602 sprintf (p
, ",%x", len
);
4604 getpkt (buf
, PBUFSIZ
, 0);
4606 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4609 case PACKET_UNKNOWN
:
4614 internal_error (__FILE__
, __LINE__
,
4615 "remote_remove_watchpoint: reached end of function");
4618 /* FIXME: This function should be static and a member of the remote
4622 remote_insert_hw_breakpoint (CORE_ADDR addr
, int len
)
4624 char *buf
= alloca (PBUFSIZ
);
4627 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4628 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4629 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4630 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4636 addr
= remote_address_masked (addr
);
4637 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4638 sprintf (p
, ",%x", len
);
4641 getpkt (buf
, PBUFSIZ
, 0);
4643 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4646 case PACKET_UNKNOWN
:
4651 internal_error (__FILE__
, __LINE__
,
4652 "remote_remove_watchpoint: reached end of function");
4655 /* FIXME: This function should be static and a member of the remote
4659 remote_remove_hw_breakpoint (CORE_ADDR addr
, int len
)
4661 char *buf
= alloca (PBUFSIZ
);
4664 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4665 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4666 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4667 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4673 addr
= remote_address_masked (addr
);
4674 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4675 sprintf (p
, ",%x", len
);
4678 getpkt (buf
, PBUFSIZ
, 0);
4680 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4683 case PACKET_UNKNOWN
:
4688 internal_error (__FILE__
, __LINE__
,
4689 "remote_remove_watchpoint: reached end of function");
4692 /* Some targets are only capable of doing downloads, and afterwards
4693 they switch to the remote serial protocol. This function provides
4694 a clean way to get from the download target to the remote target.
4695 It's basically just a wrapper so that we don't have to expose any
4696 of the internal workings of remote.c.
4698 Prior to calling this routine, you should shutdown the current
4699 target code, else you will get the "A program is being debugged
4700 already..." message. Usually a call to pop_target() suffices. */
4703 push_remote_target (char *name
, int from_tty
)
4705 printf_filtered ("Switching to remote protocol\n");
4706 remote_open (name
, from_tty
);
4709 /* Other targets want to use the entire remote serial module but with
4710 certain remote_ops overridden. */
4713 open_remote_target (char *name
, int from_tty
, struct target_ops
*target
,
4716 printf_filtered ("Selecting the %sremote protocol\n",
4717 (extended_p
? "extended-" : ""));
4718 remote_open_1 (name
, from_tty
, target
, extended_p
);
4721 /* Table used by the crc32 function to calcuate the checksum. */
4723 static unsigned long crc32_table
[256] =
4726 static unsigned long
4727 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
4729 if (!crc32_table
[1])
4731 /* Initialize the CRC table and the decoding table. */
4735 for (i
= 0; i
< 256; i
++)
4737 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
4738 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
4745 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
4751 /* compare-sections command
4753 With no arguments, compares each loadable section in the exec bfd
4754 with the same memory range on the target, and reports mismatches.
4755 Useful for verifying the image on the target against the exec file.
4756 Depends on the target understanding the new "qCRC:" request. */
4758 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4759 target method (target verify memory) and generic version of the
4760 actual command. This will allow other high-level code (especially
4761 generic_load()) to make use of this target functionality. */
4764 compare_sections_command (char *args
, int from_tty
)
4767 unsigned long host_crc
, target_crc
;
4768 extern bfd
*exec_bfd
;
4769 struct cleanup
*old_chain
;
4772 const char *sectname
;
4773 char *buf
= alloca (PBUFSIZ
);
4780 error ("command cannot be used without an exec file");
4781 if (!current_target
.to_shortname
||
4782 strcmp (current_target
.to_shortname
, "remote") != 0)
4783 error ("command can only be used with remote target");
4785 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
4787 if (!(s
->flags
& SEC_LOAD
))
4788 continue; /* skip non-loadable section */
4790 size
= bfd_get_section_size_before_reloc (s
);
4792 continue; /* skip zero-length section */
4794 sectname
= bfd_get_section_name (exec_bfd
, s
);
4795 if (args
&& strcmp (args
, sectname
) != 0)
4796 continue; /* not the section selected by user */
4798 matched
= 1; /* do this section */
4800 /* FIXME: assumes lma can fit into long */
4801 sprintf (buf
, "qCRC:%lx,%lx", (long) lma
, (long) size
);
4804 /* be clever; compute the host_crc before waiting for target reply */
4805 sectdata
= xmalloc (size
);
4806 old_chain
= make_cleanup (xfree
, sectdata
);
4807 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
4808 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
4810 getpkt (buf
, PBUFSIZ
, 0);
4812 error ("target memory fault, section %s, range 0x%08x -- 0x%08x",
4813 sectname
, lma
, lma
+ size
);
4815 error ("remote target does not support this operation");
4817 for (target_crc
= 0, tmp
= &buf
[1]; *tmp
; tmp
++)
4818 target_crc
= target_crc
* 16 + fromhex (*tmp
);
4820 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4821 sectname
, paddr (lma
), paddr (lma
+ size
));
4822 if (host_crc
== target_crc
)
4823 printf_filtered ("matched.\n");
4826 printf_filtered ("MIS-MATCHED!\n");
4830 do_cleanups (old_chain
);
4833 warning ("One or more sections of the remote executable does not match\n\
4834 the loaded file\n");
4835 if (args
&& !matched
)
4836 printf_filtered ("No loaded section named '%s'.\n", args
);
4840 remote_query (int query_type
, char *buf
, char *outbuf
, int *bufsiz
)
4843 char *buf2
= alloca (PBUFSIZ
);
4844 char *p2
= &buf2
[0];
4847 error ("null pointer to remote bufer size specified");
4849 /* minimum outbuf size is PBUFSIZ - if bufsiz is not large enough let
4850 the caller know and return what the minimum size is */
4851 /* Note: a zero bufsiz can be used to query the minimum buffer size */
4852 if (*bufsiz
< PBUFSIZ
)
4858 /* except for querying the minimum buffer size, target must be open */
4860 error ("remote query is only available after target open");
4862 /* we only take uppercase letters as query types, at least for now */
4863 if ((query_type
< 'A') || (query_type
> 'Z'))
4864 error ("invalid remote query type");
4867 error ("null remote query specified");
4870 error ("remote query requires a buffer to receive data");
4877 /* we used one buffer char for the remote protocol q command and another
4878 for the query type. As the remote protocol encapsulation uses 4 chars
4879 plus one extra in case we are debugging (remote_debug),
4880 we have PBUFZIZ - 7 left to pack the query string */
4882 while (buf
[i
] && (i
< (PBUFSIZ
- 8)))
4884 /* bad caller may have sent forbidden characters */
4885 if ((!isprint (buf
[i
])) || (buf
[i
] == '$') || (buf
[i
] == '#'))
4886 error ("illegal characters in query string");
4894 error ("query larger than available buffer");
4900 getpkt (outbuf
, *bufsiz
, 0);
4906 remote_rcmd (char *command
,
4907 struct ui_file
*outbuf
)
4910 char *buf
= alloca (PBUFSIZ
);
4914 error ("remote rcmd is only available after target open");
4916 /* Send a NULL command across as an empty command */
4917 if (command
== NULL
)
4920 /* The query prefix */
4921 strcpy (buf
, "qRcmd,");
4922 p
= strchr (buf
, '\0');
4924 if ((strlen (buf
) + strlen (command
) * 2 + 8/*misc*/) > PBUFSIZ
)
4925 error ("\"monitor\" command ``%s'' is too long\n", command
);
4927 /* Encode the actual command */
4928 bin2hex (command
, p
, 0);
4930 if (putpkt (buf
) < 0)
4931 error ("Communication problem with target\n");
4933 /* get/display the response */
4936 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
4938 getpkt (buf
, PBUFSIZ
, 0);
4940 error ("Target does not support this command\n");
4941 if (buf
[0] == 'O' && buf
[1] != 'K')
4943 remote_console_output (buf
+ 1); /* 'O' message from stub */
4946 if (strcmp (buf
, "OK") == 0)
4948 if (strlen (buf
) == 3 && buf
[0] == 'E'
4949 && isdigit (buf
[1]) && isdigit (buf
[2]))
4951 error ("Protocol error with Rcmd");
4953 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
4955 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
4956 fputc_unfiltered (c
, outbuf
);
4963 packet_command (char *args
, int from_tty
)
4965 char *buf
= alloca (PBUFSIZ
);
4968 error ("command can only be used with remote target");
4971 error ("remote-packet command requires packet text as argument");
4973 puts_filtered ("sending: ");
4974 print_packet (args
);
4975 puts_filtered ("\n");
4978 getpkt (buf
, PBUFSIZ
, 0);
4979 puts_filtered ("received: ");
4981 puts_filtered ("\n");
4985 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
4987 static void display_thread_info (struct gdb_ext_thread_info
*info
);
4989 static void threadset_test_cmd (char *cmd
, int tty
);
4991 static void threadalive_test (char *cmd
, int tty
);
4993 static void threadlist_test_cmd (char *cmd
, int tty
);
4995 int get_and_display_threadinfo (threadref
* ref
);
4997 static void threadinfo_test_cmd (char *cmd
, int tty
);
4999 static int thread_display_step (threadref
* ref
, void *context
);
5001 static void threadlist_update_test_cmd (char *cmd
, int tty
);
5003 static void init_remote_threadtests (void);
5005 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
5008 threadset_test_cmd (char *cmd
, int tty
)
5010 int sample_thread
= SAMPLE_THREAD
;
5012 printf_filtered ("Remote threadset test\n");
5013 set_thread (sample_thread
, 1);
5018 threadalive_test (char *cmd
, int tty
)
5020 int sample_thread
= SAMPLE_THREAD
;
5022 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5023 printf_filtered ("PASS: Thread alive test\n");
5025 printf_filtered ("FAIL: Thread alive test\n");
5028 void output_threadid (char *title
, threadref
* ref
);
5031 output_threadid (char *title
, threadref
*ref
)
5035 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex */
5037 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5041 threadlist_test_cmd (char *cmd
, int tty
)
5044 threadref nextthread
;
5045 int done
, result_count
;
5046 threadref threadlist
[3];
5048 printf_filtered ("Remote Threadlist test\n");
5049 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5050 &result_count
, &threadlist
[0]))
5051 printf_filtered ("FAIL: threadlist test\n");
5054 threadref
*scan
= threadlist
;
5055 threadref
*limit
= scan
+ result_count
;
5057 while (scan
< limit
)
5058 output_threadid (" thread ", scan
++);
5063 display_thread_info (struct gdb_ext_thread_info
*info
)
5065 output_threadid ("Threadid: ", &info
->threadid
);
5066 printf_filtered ("Name: %s\n ", info
->shortname
);
5067 printf_filtered ("State: %s\n", info
->display
);
5068 printf_filtered ("other: %s\n\n", info
->more_display
);
5072 get_and_display_threadinfo (threadref
*ref
)
5076 struct gdb_ext_thread_info threadinfo
;
5078 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5079 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5080 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5081 display_thread_info (&threadinfo
);
5086 threadinfo_test_cmd (char *cmd
, int tty
)
5088 int athread
= SAMPLE_THREAD
;
5092 int_to_threadref (&thread
, athread
);
5093 printf_filtered ("Remote Threadinfo test\n");
5094 if (!get_and_display_threadinfo (&thread
))
5095 printf_filtered ("FAIL cannot get thread info\n");
5099 thread_display_step (threadref
*ref
, void *context
)
5101 /* output_threadid(" threadstep ",ref); *//* simple test */
5102 return get_and_display_threadinfo (ref
);
5106 threadlist_update_test_cmd (char *cmd
, int tty
)
5108 printf_filtered ("Remote Threadlist update test\n");
5109 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5113 init_remote_threadtests (void)
5115 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
5116 "Fetch and print the remote list of thread identifiers, one pkt only");
5117 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5118 "Fetch and display info about one thread");
5119 add_com ("tset", class_obscure
, threadset_test_cmd
,
5120 "Test setting to a different thread");
5121 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5122 "Iterate through updating all remote thread info");
5123 add_com ("talive", class_obscure
, threadalive_test
,
5124 " Remote thread alive test ");
5129 /* Convert a thread ID to a string. Returns the string in a static
5133 remote_pid_to_str (ptid_t ptid
)
5135 static char buf
[30];
5137 sprintf (buf
, "Thread %d", PIDGET (ptid
));
5142 init_remote_ops (void)
5144 remote_ops
.to_shortname
= "remote";
5145 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
5147 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5148 Specify the serial device it is connected to\n\
5149 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5150 remote_ops
.to_open
= remote_open
;
5151 remote_ops
.to_close
= remote_close
;
5152 remote_ops
.to_detach
= remote_detach
;
5153 remote_ops
.to_resume
= remote_resume
;
5154 remote_ops
.to_wait
= remote_wait
;
5155 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
5156 remote_ops
.to_store_registers
= remote_store_registers
;
5157 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5158 remote_ops
.to_xfer_memory
= remote_xfer_memory
;
5159 remote_ops
.to_files_info
= remote_files_info
;
5160 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5161 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5162 remote_ops
.to_kill
= remote_kill
;
5163 remote_ops
.to_load
= generic_load
;
5164 remote_ops
.to_mourn_inferior
= remote_mourn
;
5165 remote_ops
.to_thread_alive
= remote_thread_alive
;
5166 remote_ops
.to_find_new_threads
= remote_threads_info
;
5167 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5168 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
5169 remote_ops
.to_stop
= remote_stop
;
5170 remote_ops
.to_query
= remote_query
;
5171 remote_ops
.to_rcmd
= remote_rcmd
;
5172 remote_ops
.to_stratum
= process_stratum
;
5173 remote_ops
.to_has_all_memory
= 1;
5174 remote_ops
.to_has_memory
= 1;
5175 remote_ops
.to_has_stack
= 1;
5176 remote_ops
.to_has_registers
= 1;
5177 remote_ops
.to_has_execution
= 1;
5178 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5179 remote_ops
.to_magic
= OPS_MAGIC
;
5182 /* Set up the extended remote vector by making a copy of the standard
5183 remote vector and adding to it. */
5186 init_extended_remote_ops (void)
5188 extended_remote_ops
= remote_ops
;
5190 extended_remote_ops
.to_shortname
= "extended-remote";
5191 extended_remote_ops
.to_longname
=
5192 "Extended remote serial target in gdb-specific protocol";
5193 extended_remote_ops
.to_doc
=
5194 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5195 Specify the serial device it is connected to (e.g. /dev/ttya).",
5196 extended_remote_ops
.to_open
= extended_remote_open
;
5197 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
5198 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5202 * Command: info remote-process
5204 * This implements Cisco's version of the "info proc" command.
5206 * This query allows the target stub to return an arbitrary string
5207 * (or strings) giving arbitrary information about the target process.
5208 * This is optional; the target stub isn't required to implement it.
5210 * Syntax: qfProcessInfo request first string
5211 * qsProcessInfo request subsequent string
5212 * reply: 'O'<hex-encoded-string>
5213 * 'l' last reply (empty)
5217 remote_info_process (char *args
, int from_tty
)
5219 char *buf
= alloca (PBUFSIZ
);
5221 if (remote_desc
== 0)
5222 error ("Command can only be used when connected to the remote target.");
5224 putpkt ("qfProcessInfo");
5225 getpkt (buf
, PBUFSIZ
, 0);
5227 return; /* Silently: target does not support this feature. */
5230 error ("info proc: target error.");
5232 while (buf
[0] == 'O') /* Capitol-O packet */
5234 remote_console_output (&buf
[1]);
5235 putpkt ("qsProcessInfo");
5236 getpkt (buf
, PBUFSIZ
, 0);
5245 remote_cisco_open (char *name
, int from_tty
)
5249 "To open a remote debug connection, you need to specify what \n\
5250 device is attached to the remote system (e.g. host:port).");
5252 /* See FIXME above */
5253 wait_forever_enabled_p
= 1;
5255 target_preopen (from_tty
);
5257 unpush_target (&remote_cisco_ops
);
5259 remote_desc
= SERIAL_OPEN (name
);
5261 perror_with_name (name
);
5264 * If a baud rate was specified on the gdb command line it will
5265 * be greater than the initial value of -1. If it is, use it otherwise
5269 baud_rate
= (baud_rate
> 0) ? baud_rate
: 9600;
5270 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
5272 SERIAL_CLOSE (remote_desc
);
5273 perror_with_name (name
);
5276 SERIAL_RAW (remote_desc
);
5278 /* If there is something sitting in the buffer we might take it as a
5279 response to a command, which would be bad. */
5280 SERIAL_FLUSH_INPUT (remote_desc
);
5284 puts_filtered ("Remote debugging using ");
5285 puts_filtered (name
);
5286 puts_filtered ("\n");
5289 remote_cisco_mode
= 1;
5291 push_target (&remote_cisco_ops
); /* Switch to using cisco target now */
5293 init_all_packet_configs ();
5295 general_thread
= -2;
5296 continue_thread
= -2;
5298 /* Probe for ability to use "ThreadInfo" query, as required. */
5299 use_threadinfo_query
= 1;
5300 use_threadextra_query
= 1;
5302 /* Without this, some commands which require an active target (such
5303 as kill) won't work. This variable serves (at least) double duty
5304 as both the pid of the target process (if it has such), and as a
5305 flag indicating that a target is active. These functions should
5306 be split out into seperate variables, especially since GDB will
5307 someday have a notion of debugging several processes. */
5308 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
5310 /* Start the remote connection; if error (0), discard this target. */
5312 if (!catch_errors (remote_start_remote_dummy
, (char *) 0,
5313 "Couldn't establish connection to remote target\n",
5322 remote_cisco_close (int quitting
)
5324 remote_cisco_mode
= 0;
5325 remote_close (quitting
);
5329 remote_cisco_mourn (void)
5331 remote_mourn_1 (&remote_cisco_ops
);
5343 /* shared between readsocket() and readtty() */
5344 static char *tty_input
;
5346 static int escape_count
;
5347 static int echo_check
;
5348 extern int quit_flag
;
5355 /* Loop until the socket doesn't have any more data */
5357 while ((data
= readchar (0)) >= 0)
5359 /* Check for the escape sequence */
5362 /* If this is the fourth escape, get out */
5363 if (++escape_count
== 4)
5368 { /* This is a '|', but not the fourth in a row.
5369 Continue without echoing it. If it isn't actually
5370 one of four in a row, it'll be echoed later. */
5377 /* Ensure any pending '|'s are flushed. */
5379 for (; escape_count
> 0; escape_count
--)
5383 if (data
== '\r') /* If this is a return character, */
5384 continue; /* - just supress it. */
5386 if (echo_check
!= -1) /* Check for echo of user input. */
5388 if (tty_input
[echo_check
] == data
)
5390 echo_check
++; /* Character matched user input: */
5391 continue; /* Continue without echoing it. */
5393 else if ((data
== '\n') && (tty_input
[echo_check
] == '\r'))
5394 { /* End of the line (and of echo checking). */
5395 echo_check
= -1; /* No more echo supression */
5396 continue; /* Continue without echoing. */
5399 { /* Failed check for echo of user input.
5400 We now have some suppressed output to flush! */
5403 for (j
= 0; j
< echo_check
; j
++)
5404 putchar (tty_input
[j
]);
5408 putchar (data
); /* Default case: output the char. */
5411 if (data
== SERIAL_TIMEOUT
) /* Timeout returned from readchar. */
5412 return READ_MORE
; /* Try to read some more */
5414 return FATAL_ERROR
; /* Trouble, bail out */
5422 /* First, read a buffer full from the terminal */
5423 tty_bytecount
= read (fileno (stdin
), tty_input
, sizeof (tty_input
) - 1);
5424 if (tty_bytecount
== -1)
5426 perror ("readtty: read failed");
5430 /* Remove a quoted newline. */
5431 if (tty_input
[tty_bytecount
- 1] == '\n' &&
5432 tty_input
[tty_bytecount
- 2] == '\\') /* line ending in backslash */
5434 tty_input
[--tty_bytecount
] = 0; /* remove newline */
5435 tty_input
[--tty_bytecount
] = 0; /* remove backslash */
5438 /* Turn trailing newlines into returns */
5439 if (tty_input
[tty_bytecount
- 1] == '\n')
5440 tty_input
[tty_bytecount
- 1] = '\r';
5442 /* If the line consists of a ~, enter debugging mode. */
5443 if ((tty_input
[0] == '~') && (tty_bytecount
== 2))
5446 /* Make this a zero terminated string and write it out */
5447 tty_input
[tty_bytecount
] = 0;
5448 if (SERIAL_WRITE (remote_desc
, tty_input
, tty_bytecount
))
5450 perror_with_name ("readtty: write failed");
5460 fd_set input
; /* file descriptors for select */
5461 int tablesize
; /* max number of FDs for select */
5465 extern int escape_count
; /* global shared by readsocket */
5466 extern int echo_check
; /* ditto */
5471 tablesize
= 8 * sizeof (input
);
5475 /* Check for anything from our socket - doesn't block. Note that
5476 this must be done *before* the select as there may be
5477 buffered I/O waiting to be processed. */
5479 if ((status
= readsocket ()) == FATAL_ERROR
)
5481 error ("Debugging terminated by communications error");
5483 else if (status
!= READ_MORE
)
5488 fflush (stdout
); /* Flush output before blocking */
5490 /* Now block on more socket input or TTY input */
5493 FD_SET (fileno (stdin
), &input
);
5494 FD_SET (DEPRECATED_SERIAL_FD (remote_desc
), &input
);
5496 status
= select (tablesize
, &input
, 0, 0, 0);
5497 if ((status
== -1) && (errno
!= EINTR
))
5499 error ("Communications error on select %d", errno
);
5502 /* Handle Control-C typed */
5506 if ((++quit_count
) == 2)
5508 if (query ("Interrupt GDB? "))
5510 printf_filtered ("Interrupted by user.\n");
5511 return_to_top_level (RETURN_QUIT
);
5518 SERIAL_SEND_BREAK (remote_desc
);
5520 SERIAL_WRITE (remote_desc
, "\003", 1);
5525 /* Handle console input */
5527 if (FD_ISSET (fileno (stdin
), &input
))
5531 status
= readtty ();
5532 if (status
== READ_MORE
)
5535 return status
; /* telnet session ended */
5541 remote_cisco_wait (ptid_t ptid
, struct target_waitstatus
*status
)
5543 if (minitelnet () != ENTER_DEBUG
)
5545 error ("Debugging session terminated by protocol error");
5548 return remote_wait (ptid
, status
);
5552 init_remote_cisco_ops (void)
5554 remote_cisco_ops
.to_shortname
= "cisco";
5555 remote_cisco_ops
.to_longname
= "Remote serial target in cisco-specific protocol";
5556 remote_cisco_ops
.to_doc
=
5557 "Use a remote machine via TCP, using a cisco-specific protocol.\n\
5558 Specify the serial device it is connected to (e.g. host:2020).";
5559 remote_cisco_ops
.to_open
= remote_cisco_open
;
5560 remote_cisco_ops
.to_close
= remote_cisco_close
;
5561 remote_cisco_ops
.to_detach
= remote_detach
;
5562 remote_cisco_ops
.to_resume
= remote_resume
;
5563 remote_cisco_ops
.to_wait
= remote_cisco_wait
;
5564 remote_cisco_ops
.to_fetch_registers
= remote_fetch_registers
;
5565 remote_cisco_ops
.to_store_registers
= remote_store_registers
;
5566 remote_cisco_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5567 remote_cisco_ops
.to_xfer_memory
= remote_xfer_memory
;
5568 remote_cisco_ops
.to_files_info
= remote_files_info
;
5569 remote_cisco_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5570 remote_cisco_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5571 remote_cisco_ops
.to_kill
= remote_kill
;
5572 remote_cisco_ops
.to_load
= generic_load
;
5573 remote_cisco_ops
.to_mourn_inferior
= remote_cisco_mourn
;
5574 remote_cisco_ops
.to_thread_alive
= remote_thread_alive
;
5575 remote_cisco_ops
.to_find_new_threads
= remote_threads_info
;
5576 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5577 remote_cisco_ops
.to_stratum
= process_stratum
;
5578 remote_cisco_ops
.to_has_all_memory
= 1;
5579 remote_cisco_ops
.to_has_memory
= 1;
5580 remote_cisco_ops
.to_has_stack
= 1;
5581 remote_cisco_ops
.to_has_registers
= 1;
5582 remote_cisco_ops
.to_has_execution
= 1;
5583 remote_cisco_ops
.to_magic
= OPS_MAGIC
;
5587 remote_can_async_p (void)
5589 /* We're async whenever the serial device is. */
5590 return (current_target
.to_async_mask_value
) && SERIAL_CAN_ASYNC_P (remote_desc
);
5594 remote_is_async_p (void)
5596 /* We're async whenever the serial device is. */
5597 return (current_target
.to_async_mask_value
) && SERIAL_IS_ASYNC_P (remote_desc
);
5600 /* Pass the SERIAL event on and up to the client. One day this code
5601 will be able to delay notifying the client of an event until the
5602 point where an entire packet has been received. */
5604 static void (*async_client_callback
) (enum inferior_event_type event_type
, void *context
);
5605 static void *async_client_context
;
5606 static serial_event_ftype remote_async_serial_handler
;
5609 remote_async_serial_handler (serial_t scb
, void *context
)
5611 /* Don't propogate error information up to the client. Instead let
5612 the client find out about the error by querying the target. */
5613 async_client_callback (INF_REG_EVENT
, async_client_context
);
5617 remote_async (void (*callback
) (enum inferior_event_type event_type
, void *context
), void *context
)
5619 if (current_target
.to_async_mask_value
== 0)
5620 internal_error (__FILE__
, __LINE__
,
5621 "Calling remote_async when async is masked");
5623 if (callback
!= NULL
)
5625 SERIAL_ASYNC (remote_desc
, remote_async_serial_handler
, NULL
);
5626 async_client_callback
= callback
;
5627 async_client_context
= context
;
5630 SERIAL_ASYNC (remote_desc
, NULL
, NULL
);
5633 /* Target async and target extended-async.
5635 This are temporary targets, until it is all tested. Eventually
5636 async support will be incorporated int the usual 'remote'
5640 init_remote_async_ops (void)
5642 remote_async_ops
.to_shortname
= "async";
5643 remote_async_ops
.to_longname
= "Remote serial target in async version of the gdb-specific protocol";
5644 remote_async_ops
.to_doc
=
5645 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5646 Specify the serial device it is connected to (e.g. /dev/ttya).";
5647 remote_async_ops
.to_open
= remote_async_open
;
5648 remote_async_ops
.to_close
= remote_close
;
5649 remote_async_ops
.to_detach
= remote_async_detach
;
5650 remote_async_ops
.to_resume
= remote_async_resume
;
5651 remote_async_ops
.to_wait
= remote_async_wait
;
5652 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
5653 remote_async_ops
.to_store_registers
= remote_store_registers
;
5654 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5655 remote_async_ops
.to_xfer_memory
= remote_xfer_memory
;
5656 remote_async_ops
.to_files_info
= remote_files_info
;
5657 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5658 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5659 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
5660 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
5661 remote_async_ops
.to_kill
= remote_async_kill
;
5662 remote_async_ops
.to_load
= generic_load
;
5663 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
5664 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
5665 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
5666 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5667 remote_async_ops
.to_stop
= remote_stop
;
5668 remote_async_ops
.to_query
= remote_query
;
5669 remote_async_ops
.to_rcmd
= remote_rcmd
;
5670 remote_async_ops
.to_stratum
= process_stratum
;
5671 remote_async_ops
.to_has_all_memory
= 1;
5672 remote_async_ops
.to_has_memory
= 1;
5673 remote_async_ops
.to_has_stack
= 1;
5674 remote_async_ops
.to_has_registers
= 1;
5675 remote_async_ops
.to_has_execution
= 1;
5676 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5677 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
5678 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
5679 remote_async_ops
.to_async
= remote_async
;
5680 remote_async_ops
.to_async_mask_value
= 1;
5681 remote_async_ops
.to_magic
= OPS_MAGIC
;
5684 /* Set up the async extended remote vector by making a copy of the standard
5685 remote vector and adding to it. */
5688 init_extended_async_remote_ops (void)
5690 extended_async_remote_ops
= remote_async_ops
;
5692 extended_async_remote_ops
.to_shortname
= "extended-async";
5693 extended_async_remote_ops
.to_longname
=
5694 "Extended remote serial target in async gdb-specific protocol";
5695 extended_async_remote_ops
.to_doc
=
5696 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5697 Specify the serial device it is connected to (e.g. /dev/ttya).",
5698 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
5699 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
5700 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5704 set_remote_cmd (char *args
, int from_tty
)
5710 show_remote_cmd (char *args
, int from_tty
)
5713 show_remote_protocol_Z_packet_cmd (args
, from_tty
);
5714 show_remote_protocol_e_packet_cmd (args
, from_tty
);
5715 show_remote_protocol_E_packet_cmd (args
, from_tty
);
5716 show_remote_protocol_P_packet_cmd (args
, from_tty
);
5717 show_remote_protocol_binary_download_cmd (args
, from_tty
);
5721 build_remote_gdbarch_data (void)
5723 build_remote_packet_sizes ();
5726 tty_input
= xmalloc (PBUFSIZ
);
5727 remote_address_size
= TARGET_ADDR_BIT
;
5731 _initialize_remote (void)
5733 static struct cmd_list_element
*remote_set_cmdlist
;
5734 static struct cmd_list_element
*remote_show_cmdlist
;
5735 struct cmd_list_element
*tmpcmd
;
5737 /* architecture specific data */
5738 build_remote_gdbarch_data ();
5739 register_gdbarch_swap (&tty_input
, sizeof (&tty_input
), NULL
);
5740 register_remote_packet_sizes ();
5741 register_gdbarch_swap (&remote_address_size
,
5742 sizeof (&remote_address_size
), NULL
);
5743 register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
5746 add_target (&remote_ops
);
5748 init_extended_remote_ops ();
5749 add_target (&extended_remote_ops
);
5751 init_remote_async_ops ();
5752 add_target (&remote_async_ops
);
5754 init_extended_async_remote_ops ();
5755 add_target (&extended_async_remote_ops
);
5757 init_remote_cisco_ops ();
5758 add_target (&remote_cisco_ops
);
5761 init_remote_threadtests ();
5764 /* set/show remote ... */
5766 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, "\
5767 Remote protocol specific variables\n\
5768 Configure various remote-protocol specific variables such as\n\
5769 the packets being used",
5770 &remote_set_cmdlist
, "set remote ",
5771 0/*allow-unknown*/, &setlist
);
5772 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, "\
5773 Remote protocol specific variables\n\
5774 Configure various remote-protocol specific variables such as\n\
5775 the packets being used",
5776 &remote_show_cmdlist
, "show remote ",
5777 0/*allow-unknown*/, &showlist
);
5779 add_cmd ("compare-sections", class_obscure
, compare_sections_command
,
5780 "Compare section data on target to the exec file.\n\
5781 Argument is a single section name (default: all loaded sections).",
5784 add_cmd ("packet", class_maintenance
, packet_command
,
5785 "Send an arbitrary packet to a remote target.\n\
5786 maintenance packet TEXT\n\
5787 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5788 this command sends the string TEXT to the inferior, and displays the\n\
5789 response packet. GDB supplies the initial `$' character, and the\n\
5790 terminating `#' character and checksum.",
5794 (add_set_cmd ("remotebreak", no_class
,
5795 var_boolean
, (char *) &remote_break
,
5796 "Set whether to send break if interrupted.\n",
5800 /* Install commands for configuring memory read/write packets. */
5802 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
,
5803 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5805 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
,
5806 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5808 add_cmd ("memory-write-packet-size", no_class
,
5809 set_memory_write_packet_size
,
5810 "Set the maximum number of bytes per memory-write packet.\n"
5811 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5812 "default packet size. The actual limit is further reduced\n"
5813 "dependent on the target. Specify ``fixed'' to disable the\n"
5814 "further restriction and ``limit'' to enable that restriction\n",
5815 &remote_set_cmdlist
);
5816 add_cmd ("memory-read-packet-size", no_class
,
5817 set_memory_read_packet_size
,
5818 "Set the maximum number of bytes per memory-read packet.\n"
5819 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5820 "default packet size. The actual limit is further reduced\n"
5821 "dependent on the target. Specify ``fixed'' to disable the\n"
5822 "further restriction and ``limit'' to enable that restriction\n",
5823 &remote_set_cmdlist
);
5824 add_cmd ("memory-write-packet-size", no_class
,
5825 show_memory_write_packet_size
,
5826 "Show the maximum number of bytes per memory-write packet.\n",
5827 &remote_show_cmdlist
);
5828 add_cmd ("memory-read-packet-size", no_class
,
5829 show_memory_read_packet_size
,
5830 "Show the maximum number of bytes per memory-read packet.\n",
5831 &remote_show_cmdlist
);
5834 (add_set_cmd ("remoteaddresssize", class_obscure
,
5835 var_integer
, (char *) &remote_address_size
,
5836 "Set the maximum size of the address (in bits) \
5837 in a memory packet.\n",
5841 add_packet_config_cmd (&remote_protocol_binary_download
,
5842 "X", "binary-download",
5843 set_remote_protocol_binary_download_cmd
,
5844 show_remote_protocol_binary_download_cmd
,
5845 &remote_set_cmdlist
, &remote_show_cmdlist
,
5848 /* XXXX - should ``set remotebinarydownload'' be retained for
5851 (add_set_cmd ("remotebinarydownload", no_class
,
5852 var_boolean
, (char *) &remote_binary_download
,
5853 "Set binary downloads.\n", &setlist
),
5857 add_info ("remote-process", remote_info_process
,
5858 "Query the remote system for process info.");
5860 add_packet_config_cmd (&remote_protocol_e
,
5861 "e", "step-over-range",
5862 set_remote_protocol_e_packet_cmd
,
5863 show_remote_protocol_e_packet_cmd
,
5864 &remote_set_cmdlist
, &remote_show_cmdlist
,
5867 add_packet_config_cmd (&remote_protocol_E
,
5868 "E", "step-over-range-w-signal",
5869 set_remote_protocol_E_packet_cmd
,
5870 show_remote_protocol_E_packet_cmd
,
5871 &remote_set_cmdlist
, &remote_show_cmdlist
,
5874 add_packet_config_cmd (&remote_protocol_P
,
5875 "P", "set-register",
5876 set_remote_protocol_P_packet_cmd
,
5877 show_remote_protocol_P_packet_cmd
,
5878 &remote_set_cmdlist
, &remote_show_cmdlist
,
5881 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
],
5882 "Z0", "software-breakpoint",
5883 set_remote_protocol_Z_software_bp_packet_cmd
,
5884 show_remote_protocol_Z_software_bp_packet_cmd
,
5885 &remote_set_cmdlist
, &remote_show_cmdlist
,
5888 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
],
5889 "Z1", "hardware-breakpoint",
5890 set_remote_protocol_Z_hardware_bp_packet_cmd
,
5891 show_remote_protocol_Z_hardware_bp_packet_cmd
,
5892 &remote_set_cmdlist
, &remote_show_cmdlist
,
5895 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
],
5896 "Z2", "write-watchpoint",
5897 set_remote_protocol_Z_write_wp_packet_cmd
,
5898 show_remote_protocol_Z_write_wp_packet_cmd
,
5899 &remote_set_cmdlist
, &remote_show_cmdlist
,
5902 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
],
5903 "Z3", "read-watchpoint",
5904 set_remote_protocol_Z_read_wp_packet_cmd
,
5905 show_remote_protocol_Z_read_wp_packet_cmd
,
5906 &remote_set_cmdlist
, &remote_show_cmdlist
,
5909 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
],
5910 "Z4", "access-watchpoint",
5911 set_remote_protocol_Z_access_wp_packet_cmd
,
5912 show_remote_protocol_Z_access_wp_packet_cmd
,
5913 &remote_set_cmdlist
, &remote_show_cmdlist
,
5916 /* Keep the old ``set remote Z-packet ...'' working. */
5917 tmpcmd
= add_set_auto_boolean_cmd ("Z-packet", class_obscure
,
5918 &remote_Z_packet_detect
,
5920 Set use of remote protocol `Z' packets", &remote_set_cmdlist
);
5921 tmpcmd
->function
.sfunc
= set_remote_protocol_Z_packet_cmd
;
5922 add_cmd ("Z-packet", class_obscure
, show_remote_protocol_Z_packet_cmd
,
5923 "Show use of remote protocol `Z' packets ",
5924 &remote_show_cmdlist
);