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 /* Prototypes for local functions */
54 static void cleanup_sigint_signal_handler (void *dummy
);
55 static void initialize_sigint_signal_handler (void);
56 static int getpkt_sane (char *buf
, long sizeof_buf
, int forever
);
58 static void handle_remote_sigint (int);
59 static void handle_remote_sigint_twice (int);
60 static void async_remote_interrupt (gdb_client_data
);
61 void async_remote_interrupt_twice (gdb_client_data
);
63 static void build_remote_gdbarch_data (void);
65 static int remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
);
67 static int remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
);
69 static void remote_files_info (struct target_ops
*ignore
);
71 static int remote_xfer_memory (CORE_ADDR memaddr
, char *myaddr
,
72 int len
, int should_write
,
73 struct mem_attrib
*attrib
,
74 struct target_ops
*target
);
76 static void remote_prepare_to_store (void);
78 static void remote_fetch_registers (int regno
);
80 static void remote_resume (int pid
, int step
, enum target_signal siggnal
);
81 static void remote_async_resume (int pid
, int step
,
82 enum target_signal siggnal
);
83 static int remote_start_remote (PTR
);
85 static void remote_open (char *name
, int from_tty
);
86 static void remote_async_open (char *name
, int from_tty
);
88 static void extended_remote_open (char *name
, int from_tty
);
89 static void extended_remote_async_open (char *name
, int from_tty
);
91 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
);
92 static void remote_async_open_1 (char *, int, struct target_ops
*,
95 static void remote_close (int quitting
);
97 static void remote_store_registers (int regno
);
99 static void remote_mourn (void);
100 static void remote_async_mourn (void);
102 static void extended_remote_restart (void);
104 static void extended_remote_mourn (void);
106 static void extended_remote_create_inferior (char *, char *, char **);
107 static void extended_remote_async_create_inferior (char *, char *, char **);
109 static void remote_mourn_1 (struct target_ops
*);
111 static void remote_send (char *buf
, long sizeof_buf
);
113 static int readchar (int timeout
);
115 static int remote_wait (int pid
, struct target_waitstatus
*status
);
116 static int remote_async_wait (int pid
, struct target_waitstatus
*status
);
118 static void remote_kill (void);
119 static void remote_async_kill (void);
121 static int tohex (int nib
);
123 static void remote_detach (char *args
, int from_tty
);
124 static void remote_async_detach (char *args
, int from_tty
);
126 static void remote_interrupt (int signo
);
128 static void remote_interrupt_twice (int signo
);
130 static void interrupt_query (void);
132 static void set_thread (int, int);
134 static int remote_thread_alive (int);
136 static void get_offsets (void);
138 static long read_frame (char *buf
, long sizeof_buf
);
140 static int remote_insert_breakpoint (CORE_ADDR
, char *);
142 static int remote_remove_breakpoint (CORE_ADDR
, char *);
144 static int hexnumlen (ULONGEST num
);
146 static void init_remote_ops (void);
148 static void init_extended_remote_ops (void);
150 static void init_remote_cisco_ops (void);
152 static struct target_ops remote_cisco_ops
;
154 static void remote_stop (void);
156 static int ishex (int ch
, int *val
);
158 static int stubhex (int ch
);
160 static int remote_query (int /*char */ , char *, char *, int *);
162 static int hexnumstr (char *, ULONGEST
);
164 static int hexnumnstr (char *, ULONGEST
, int);
166 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
168 static void print_packet (char *);
170 static unsigned long crc32 (unsigned char *, int, unsigned int);
172 static void compare_sections_command (char *, int);
174 static void packet_command (char *, int);
176 static int stub_unpack_int (char *buff
, int fieldlength
);
178 static int remote_current_thread (int oldpid
);
180 static void remote_find_new_threads (void);
182 static void record_currthread (int currthread
);
184 /* exported functions */
186 extern int fromhex (int a
);
188 static int putpkt_binary (char *buf
, int cnt
);
190 static void check_binary_download (CORE_ADDR addr
);
192 struct packet_config
;
194 static void show_packet_config_cmd (struct packet_config
*config
);
196 static void update_packet_config (struct packet_config
*config
);
198 /* Define the target subroutine names */
200 void open_remote_target (char *, int, struct target_ops
*, int);
202 void _initialize_remote (void);
206 static struct target_ops remote_ops
;
208 static struct target_ops extended_remote_ops
;
210 /* Temporary target ops. Just like the remote_ops and
211 extended_remote_ops, but with asynchronous support. */
212 static struct target_ops remote_async_ops
;
214 static struct target_ops extended_async_remote_ops
;
216 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
217 ``forever'' still use the normal timeout mechanism. This is
218 currently used by the ASYNC code to guarentee that target reads
219 during the initial connect always time-out. Once getpkt has been
220 modified to return a timeout indication and, in turn
221 remote_wait()/wait_for_inferior() have gained a timeout parameter
223 static int wait_forever_enabled_p
= 1;
226 /* This variable chooses whether to send a ^C or a break when the user
227 requests program interruption. Although ^C is usually what remote
228 systems expect, and that is the default here, sometimes a break is
229 preferable instead. */
231 static int remote_break
;
233 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
234 remote_open knows that we don't have a file open when the program
236 static serial_t remote_desc
= NULL
;
238 /* This is set by the target (thru the 'S' message)
239 to denote that the target is in kernel mode. */
240 static int cisco_kernel_mode
= 0;
242 /* This variable sets the number of bits in an address that are to be
243 sent in a memory ("M" or "m") packet. Normally, after stripping
244 leading zeros, the entire address would be sent. This variable
245 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
246 initial implementation of remote.c restricted the address sent in
247 memory packets to ``host::sizeof long'' bytes - (typically 32
248 bits). Consequently, for 64 bit targets, the upper 32 bits of an
249 address was never sent. Since fixing this bug may cause a break in
250 some remote targets this variable is principly provided to
251 facilitate backward compatibility. */
253 static int remote_address_size
;
255 /* Tempoary to track who currently owns the terminal. See
256 target_async_terminal_* for more details. */
258 static int remote_async_terminal_ours_p
;
261 /* This is the size (in chars) of the first response to the ``g''
262 packet. It is used as a heuristic when determining the maximum
263 size of memory-read and memory-write packets. A target will
264 typically only reserve a buffer large enough to hold the ``g''
265 packet. The size does not include packet overhead (headers and
268 static long actual_register_packet_size
;
270 /* This is the maximum size (in chars) of a non read/write packet. It
271 is also used as a cap on the size of read/write packets. */
273 static long remote_packet_size
;
275 #define PBUFSIZ (remote_packet_size)
277 /* User configurable variables for the number of characters in a
278 memory read/write packet. MIN (PBUFSIZ, g-packet-size) is the
279 default. Some targets need smaller values (fifo overruns, et.al.)
280 and some users need larger values (speed up transfers). The
281 variables ``preferred_*'' (the user request), ``current_*'' (what
282 was actually set) and ``forced_*'' (Positive - a soft limit,
283 negative - a hard limit). */
285 struct memory_packet_config
292 /* Compute the current size of a read/write packet. Since this makes
293 use of ``actual_register_packet_size'' the computation is dynamic. */
296 get_memory_packet_size (struct memory_packet_config
*config
)
298 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
299 law?) that some hosts don't cope very well with large alloca()
300 calls. Eventually the alloca() code will be replaced by calls to
301 xmalloc() and make_cleanups() allowing this restriction to either
302 be lifted or removed. */
303 #ifndef MAX_REMOTE_PACKET_SIZE
304 #define MAX_REMOTE_PACKET_SIZE 16384
306 /* NOTE: 16 is just chosen at random. */
307 #ifndef MIN_REMOTE_PACKET_SIZE
308 #define MIN_REMOTE_PACKET_SIZE 16
313 if (config
->size
<= 0)
314 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
316 what_they_get
= config
->size
;
320 what_they_get
= remote_packet_size
;
321 /* Limit the packet to the size specified by the user. */
323 && what_they_get
> config
->size
)
324 what_they_get
= config
->size
;
325 /* Limit it to the size of the targets ``g'' response. */
326 if (actual_register_packet_size
> 0
327 && what_they_get
> actual_register_packet_size
)
328 what_they_get
= actual_register_packet_size
;
330 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
331 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
332 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
333 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
334 return what_they_get
;
337 /* Update the size of a read/write packet. If they user wants
338 something really big then do a sanity check. */
341 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
343 int fixed_p
= config
->fixed_p
;
344 long size
= config
->size
;
346 error ("Argument required (integer, `fixed' or `limited').");
347 else if (strcmp (args
, "hard") == 0
348 || strcmp (args
, "fixed") == 0)
350 else if (strcmp (args
, "soft") == 0
351 || strcmp (args
, "limit") == 0)
356 size
= strtoul (args
, &end
, 0);
358 error ("Invalid %s (bad syntax).", config
->name
);
360 /* Instead of explicitly capping the size of a packet to
361 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
362 instead allowed to set the size to something arbitrarily
364 if (size
> MAX_REMOTE_PACKET_SIZE
)
365 error ("Invalid %s (too large).", config
->name
);
369 if (fixed_p
&& !config
->fixed_p
)
371 if (! query ("The target may not be able to correctly handle a %s\n"
372 "of %ld bytes. Change the packet size? ",
374 error ("Packet size not changed.");
376 /* Update the config. */
377 config
->fixed_p
= fixed_p
;
382 show_memory_packet_size (struct memory_packet_config
*config
)
384 printf_filtered ("The %s is %ld. ", config
->name
, config
->size
);
386 printf_filtered ("Packets are fixed at %ld bytes.\n",
387 get_memory_packet_size (config
));
389 printf_filtered ("Packets are limited to %ld bytes.\n",
390 get_memory_packet_size (config
));
393 static struct memory_packet_config memory_write_packet_config
=
395 "memory-write-packet-size",
399 set_memory_write_packet_size (char *args
, int from_tty
)
401 set_memory_packet_size (args
, &memory_write_packet_config
);
405 show_memory_write_packet_size (char *args
, int from_tty
)
407 show_memory_packet_size (&memory_write_packet_config
);
411 get_memory_write_packet_size (void)
413 return get_memory_packet_size (&memory_write_packet_config
);
416 static struct memory_packet_config memory_read_packet_config
=
418 "memory-read-packet-size",
422 set_memory_read_packet_size (char *args
, int from_tty
)
424 set_memory_packet_size (args
, &memory_read_packet_config
);
428 show_memory_read_packet_size (char *args
, int from_tty
)
430 show_memory_packet_size (&memory_read_packet_config
);
434 get_memory_read_packet_size (void)
436 long size
= get_memory_packet_size (&memory_read_packet_config
);
437 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
438 extra buffer size argument before the memory read size can be
439 increased beyond PBUFSIZ. */
445 /* Register packet size initialization. Since the bounds change when
446 the architecture changes (namely REGISTER_BYTES) this all needs to
450 register_remote_packet_sizes (void)
452 REGISTER_GDBARCH_SWAP (remote_packet_size
);
453 REGISTER_GDBARCH_SWAP (actual_register_packet_size
);
457 build_remote_packet_sizes (void)
459 /* Default maximum number of characters in a packet body. Many
460 remote stubs have a hardwired buffer size of 400 bytes
461 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
462 as the maximum packet-size to ensure that the packet and an extra
463 NUL character can always fit in the buffer. This stops GDB
464 trashing stubs that try to squeeze an extra NUL into what is
465 already a full buffer (As of 1999-12-04 that was most stubs. */
466 remote_packet_size
= 400 - 1;
467 /* Should REGISTER_BYTES needs more space than the default, adjust
468 the size accordingly. Remember that each byte is encoded as two
469 characters. 32 is the overhead for the packet header /
470 footer. NOTE: cagney/1999-10-26: I suspect that 8
471 (``$NN:G...#NN'') is a better guess, the below has been padded a
473 if (REGISTER_BYTES
> ((remote_packet_size
- 32) / 2))
474 remote_packet_size
= (REGISTER_BYTES
* 2 + 32);
476 /* This one is filled in when a ``g'' packet is received. */
477 actual_register_packet_size
= 0;
480 /* Generic configuration support for packets the stub optionally
481 supports. Allows the user to specify the use of the packet as well
482 as allowing GDB to auto-detect support in the remote stub. */
486 PACKET_SUPPORT_UNKNOWN
= 0,
495 enum cmd_auto_boolean detect
;
496 enum packet_support support
;
499 /* Analyze a packet's return value and update the packet config
510 update_packet_config (struct packet_config
*config
)
512 switch (config
->detect
)
514 case CMD_AUTO_BOOLEAN_TRUE
:
515 config
->support
= PACKET_ENABLE
;
517 case CMD_AUTO_BOOLEAN_FALSE
:
518 config
->support
= PACKET_DISABLE
;
520 case CMD_AUTO_BOOLEAN_AUTO
:
521 config
->support
= PACKET_SUPPORT_UNKNOWN
;
527 show_packet_config_cmd (struct packet_config
*config
)
529 char *support
= "internal-error";
530 switch (config
->support
)
536 support
= "disabled";
538 case PACKET_SUPPORT_UNKNOWN
:
542 switch (config
->detect
)
544 case CMD_AUTO_BOOLEAN_AUTO
:
545 printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
546 config
->name
, config
->title
, support
);
548 case CMD_AUTO_BOOLEAN_TRUE
:
549 case CMD_AUTO_BOOLEAN_FALSE
:
550 printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
551 config
->name
, config
->title
, support
);
557 add_packet_config_cmd (struct packet_config
*config
,
560 void (*set_func
) (char *args
, int from_tty
,
561 struct cmd_list_element
*
563 void (*show_func
) (char *name
,
565 struct cmd_list_element
**set_remote_list
,
566 struct cmd_list_element
**show_remote_list
,
569 struct cmd_list_element
*set_cmd
;
570 struct cmd_list_element
*show_cmd
;
575 config
->title
= title
;
576 config
->detect
= CMD_AUTO_BOOLEAN_AUTO
;
577 config
->support
= PACKET_SUPPORT_UNKNOWN
;
578 xasprintf (&set_doc
, "Set use of remote protocol `%s' (%s) packet",
580 xasprintf (&show_doc
, "Show current use of remote protocol `%s' (%s) packet",
582 /* set/show TITLE-packet {auto,on,off} */
583 xasprintf (&cmd_name
, "%s-packet", title
);
584 set_cmd
= add_set_auto_boolean_cmd (cmd_name
, class_obscure
,
585 &config
->detect
, set_doc
,
587 set_cmd
->function
.sfunc
= set_func
;
588 show_cmd
= add_cmd (cmd_name
, class_obscure
, show_func
, show_doc
,
590 /* set/show remote NAME-packet {auto,on,off} -- legacy */
594 xasprintf (&legacy_name
, "%s-packet", name
);
595 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
597 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
602 static enum packet_result
603 packet_ok (const char *buf
, struct packet_config
*config
)
607 /* The stub recognized the packet request. Check that the
608 operation succeeded. */
609 switch (config
->support
)
611 case PACKET_SUPPORT_UNKNOWN
:
613 fprintf_unfiltered (gdb_stdlog
,
614 "Packet %s (%s) is supported\n",
615 config
->name
, config
->title
);
616 config
->support
= PACKET_ENABLE
;
619 internal_error (__FILE__
, __LINE__
,
620 "packet_ok: attempt to use a disabled packet");
625 if (buf
[0] == 'O' && buf
[1] == 'K' && buf
[2] == '\0')
626 /* "OK" - definitly OK. */
629 && isxdigit (buf
[1]) && isxdigit (buf
[2])
631 /* "Enn" - definitly an error. */
633 /* The packet may or may not be OK. Just assume it is */
638 /* The stub does not support the packet. */
639 switch (config
->support
)
642 if (config
->detect
== CMD_AUTO_BOOLEAN_AUTO
)
643 /* If the stub previously indicated that the packet was
644 supported then there is a protocol error.. */
645 error ("Protocol error: %s (%s) conflicting enabled responses.",
646 config
->name
, config
->title
);
648 /* The user set it wrong. */
649 error ("Enabled packet %s (%s) not recognized by stub",
650 config
->name
, config
->title
);
652 case PACKET_SUPPORT_UNKNOWN
:
654 fprintf_unfiltered (gdb_stdlog
,
655 "Packet %s (%s) is NOT supported\n",
656 config
->name
, config
->title
);
657 config
->support
= PACKET_DISABLE
;
662 return PACKET_UNKNOWN
;
666 /* Should we try the 'e' (step over range) request? */
667 static struct packet_config remote_protocol_e
;
670 set_remote_protocol_e_packet_cmd (char *args
, int from_tty
,
671 struct cmd_list_element
*c
)
673 update_packet_config (&remote_protocol_e
);
677 show_remote_protocol_e_packet_cmd (char *args
, int from_tty
)
679 show_packet_config_cmd (&remote_protocol_e
);
683 /* Should we try the 'E' (step over range / w signal #) request? */
684 static struct packet_config remote_protocol_E
;
687 set_remote_protocol_E_packet_cmd (char *args
, int from_tty
,
688 struct cmd_list_element
*c
)
690 update_packet_config (&remote_protocol_E
);
694 show_remote_protocol_E_packet_cmd (char *args
, int from_tty
)
696 show_packet_config_cmd (&remote_protocol_E
);
700 /* Should we try the 'P' (set register) request? */
702 static struct packet_config remote_protocol_P
;
705 set_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
706 struct cmd_list_element
*c
)
708 update_packet_config (&remote_protocol_P
);
712 show_remote_protocol_P_packet_cmd (char *args
, int from_tty
)
714 show_packet_config_cmd (&remote_protocol_P
);
717 /* Should we try one of the 'Z' requests? */
721 Z_PACKET_SOFTWARE_BP
,
722 Z_PACKET_HARDWARE_BP
,
729 static struct packet_config remote_protocol_Z
[NR_Z_PACKET_TYPES
];
731 /* FIXME: Instead of having all these boiler plate functions, the
732 command callback should include a context argument. */
735 set_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
736 struct cmd_list_element
*c
)
738 update_packet_config (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
742 show_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
)
744 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
748 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
749 struct cmd_list_element
*c
)
751 update_packet_config (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
755 show_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
)
757 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
761 set_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
762 struct cmd_list_element
*c
)
764 update_packet_config (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
768 show_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
)
770 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
774 set_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
775 struct cmd_list_element
*c
)
777 update_packet_config (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
781 show_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
)
783 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
787 set_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
788 struct cmd_list_element
*c
)
790 update_packet_config (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
794 show_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
)
796 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
799 /* For compatibility with older distributions. Provide a ``set remote
800 Z-packet ...'' command that updates all the Z packet types. */
802 static enum cmd_auto_boolean remote_Z_packet_detect
;
805 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
806 struct cmd_list_element
*c
)
809 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
811 remote_protocol_Z
[i
].detect
= remote_Z_packet_detect
;
812 update_packet_config (&remote_protocol_Z
[i
]);
817 show_remote_protocol_Z_packet_cmd (char *args
, int from_tty
)
820 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
822 show_packet_config_cmd (&remote_protocol_Z
[i
]);
826 /* Should we try the 'X' (remote binary download) packet?
828 This variable (available to the user via "set remote X-packet")
829 dictates whether downloads are sent in binary (via the 'X' packet).
830 We assume that the stub can, and attempt to do it. This will be
831 cleared if the stub does not understand it. This switch is still
832 needed, though in cases when the packet is supported in the stub,
833 but the connection does not allow it (i.e., 7-bit serial connection
836 static struct packet_config remote_protocol_binary_download
;
838 /* Should we try the 'ThreadInfo' query packet?
840 This variable (NOT available to the user: auto-detect only!)
841 determines whether GDB will use the new, simpler "ThreadInfo"
842 query or the older, more complex syntax for thread queries.
843 This is an auto-detect variable (set to true at each connect,
844 and set to false when the target fails to recognize it). */
846 static int use_threadinfo_query
;
847 static int use_threadextra_query
;
850 set_remote_protocol_binary_download_cmd (char *args
,
852 struct cmd_list_element
*c
)
854 update_packet_config (&remote_protocol_binary_download
);
858 show_remote_protocol_binary_download_cmd (char *args
,
861 show_packet_config_cmd (&remote_protocol_binary_download
);
865 /* Tokens for use by the asynchronous signal handlers for SIGINT */
866 PTR sigint_remote_twice_token
;
867 PTR sigint_remote_token
;
869 /* These are pointers to hook functions that may be set in order to
870 modify resume/wait behavior for a particular architecture. */
872 void (*target_resume_hook
) (void);
873 void (*target_wait_loop_hook
) (void);
877 /* These are the threads which we last sent to the remote system.
878 -1 for all or -2 for not sent yet. */
879 static int general_thread
;
880 static int continue_thread
;
882 /* Call this function as a result of
883 1) A halt indication (T packet) containing a thread id
884 2) A direct query of currthread
885 3) Successful execution of set thread
889 record_currthread (int currthread
)
891 general_thread
= currthread
;
893 /* If this is a new thread, add it to GDB's thread list.
894 If we leave it up to WFI to do this, bad things will happen. */
895 if (!in_thread_list (currthread
))
897 add_thread (currthread
);
899 ui_out_text (uiout
, "[New ");
900 ui_out_text (uiout
, target_pid_to_str (currthread
));
901 ui_out_text (uiout
, "]\n");
903 printf_filtered ("[New %s]\n", target_pid_to_str (currthread
));
908 #define MAGIC_NULL_PID 42000
911 set_thread (int th
, int gen
)
913 char *buf
= alloca (PBUFSIZ
);
914 int state
= gen
? general_thread
: continue_thread
;
920 buf
[1] = gen
? 'g' : 'c';
921 if (th
== MAGIC_NULL_PID
)
927 sprintf (&buf
[2], "-%x", -th
);
929 sprintf (&buf
[2], "%x", th
);
931 getpkt (buf
, PBUFSIZ
, 0);
935 continue_thread
= th
;
938 /* Return nonzero if the thread TH is still alive on the remote system. */
941 remote_thread_alive (int tid
)
946 sprintf (buf
, "T-%08x", -tid
);
948 sprintf (buf
, "T%08x", tid
);
950 getpkt (buf
, sizeof (buf
), 0);
951 return (buf
[0] == 'O' && buf
[1] == 'K');
954 /* About these extended threadlist and threadinfo packets. They are
955 variable length packets but, the fields within them are often fixed
956 length. They are redundent enough to send over UDP as is the
957 remote protocol in general. There is a matching unit test module
960 #define OPAQUETHREADBYTES 8
962 /* a 64 bit opaque identifier */
963 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
965 /* WARNING: This threadref data structure comes from the remote O.S., libstub
966 protocol encoding, and remote.c. it is not particularly changable */
968 /* Right now, the internal structure is int. We want it to be bigger.
972 typedef int gdb_threadref
; /* internal GDB thread reference */
974 /* gdb_ext_thread_info is an internal GDB data structure which is
975 equivalint to the reply of the remote threadinfo packet */
977 struct gdb_ext_thread_info
979 threadref threadid
; /* External form of thread reference */
980 int active
; /* Has state interesting to GDB? , regs, stack */
981 char display
[256]; /* Brief state display, name, blocked/syspended */
982 char shortname
[32]; /* To be used to name threads */
983 char more_display
[256]; /* Long info, statistics, queue depth, whatever */
986 /* The volume of remote transfers can be limited by submitting
987 a mask containing bits specifying the desired information.
988 Use a union of these values as the 'selection' parameter to
989 get_thread_info. FIXME: Make these TAG names more thread specific.
992 #define TAG_THREADID 1
994 #define TAG_DISPLAY 4
995 #define TAG_THREADNAME 8
996 #define TAG_MOREDISPLAY 16
998 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
1000 char *unpack_varlen_hex (char *buff
, int *result
);
1002 static char *unpack_nibble (char *buf
, int *val
);
1004 static char *pack_nibble (char *buf
, int nibble
);
1006 static char *pack_hex_byte (char *pkt
, int /*unsigned char */ byte
);
1008 static char *unpack_byte (char *buf
, int *value
);
1010 static char *pack_int (char *buf
, int value
);
1012 static char *unpack_int (char *buf
, int *value
);
1014 static char *unpack_string (char *src
, char *dest
, int length
);
1016 static char *pack_threadid (char *pkt
, threadref
* id
);
1018 static char *unpack_threadid (char *inbuf
, threadref
* id
);
1020 void int_to_threadref (threadref
* id
, int value
);
1022 static int threadref_to_int (threadref
* ref
);
1024 static void copy_threadref (threadref
* dest
, threadref
* src
);
1026 static int threadmatch (threadref
* dest
, threadref
* src
);
1028 static char *pack_threadinfo_request (char *pkt
, int mode
, threadref
* id
);
1030 static int remote_unpack_thread_info_response (char *pkt
,
1031 threadref
* expectedref
,
1032 struct gdb_ext_thread_info
1036 static int remote_get_threadinfo (threadref
* threadid
, int fieldset
, /*TAG mask */
1037 struct gdb_ext_thread_info
*info
);
1039 static int adapt_remote_get_threadinfo (gdb_threadref
* ref
,
1041 struct gdb_ext_thread_info
*info
);
1043 static char *pack_threadlist_request (char *pkt
, int startflag
,
1045 threadref
* nextthread
);
1047 static int parse_threadlist_response (char *pkt
,
1049 threadref
* original_echo
,
1050 threadref
* resultlist
, int *doneflag
);
1052 static int remote_get_threadlist (int startflag
,
1053 threadref
* nextthread
,
1056 int *result_count
, threadref
* threadlist
);
1058 typedef int (*rmt_thread_action
) (threadref
* ref
, void *context
);
1060 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1061 void *context
, int looplimit
);
1063 static int remote_newthread_step (threadref
* ref
, void *context
);
1065 /* encode 64 bits in 16 chars of hex */
1067 static const char hexchars
[] = "0123456789abcdef";
1070 ishex (int ch
, int *val
)
1072 if ((ch
>= 'a') && (ch
<= 'f'))
1074 *val
= ch
- 'a' + 10;
1077 if ((ch
>= 'A') && (ch
<= 'F'))
1079 *val
= ch
- 'A' + 10;
1082 if ((ch
>= '0') && (ch
<= '9'))
1093 if (ch
>= 'a' && ch
<= 'f')
1094 return ch
- 'a' + 10;
1095 if (ch
>= '0' && ch
<= '9')
1097 if (ch
>= 'A' && ch
<= 'F')
1098 return ch
- 'A' + 10;
1103 stub_unpack_int (char *buff
, int fieldlength
)
1110 nibble
= stubhex (*buff
++);
1114 retval
= retval
<< 4;
1120 unpack_varlen_hex (char *buff
, /* packet to parse */
1126 while (ishex (*buff
, &nibble
))
1129 retval
= retval
<< 4;
1130 retval
|= nibble
& 0x0f;
1137 unpack_nibble (char *buf
, int *val
)
1139 ishex (*buf
++, val
);
1144 pack_nibble (char *buf
, int nibble
)
1146 *buf
++ = hexchars
[(nibble
& 0x0f)];
1151 pack_hex_byte (char *pkt
, int byte
)
1153 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1154 *pkt
++ = hexchars
[(byte
& 0xf)];
1159 unpack_byte (char *buf
, int *value
)
1161 *value
= stub_unpack_int (buf
, 2);
1166 pack_int (char *buf
, int value
)
1168 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1169 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1170 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1171 buf
= pack_hex_byte (buf
, (value
& 0xff));
1176 unpack_int (char *buf
, int *value
)
1178 *value
= stub_unpack_int (buf
, 8);
1182 #if 0 /* currently unused, uncomment when needed */
1183 static char *pack_string (char *pkt
, char *string
);
1186 pack_string (char *pkt
, char *string
)
1191 len
= strlen (string
);
1193 len
= 200; /* Bigger than most GDB packets, junk??? */
1194 pkt
= pack_hex_byte (pkt
, len
);
1198 if ((ch
== '\0') || (ch
== '#'))
1199 ch
= '*'; /* Protect encapsulation */
1204 #endif /* 0 (unused) */
1207 unpack_string (char *src
, char *dest
, int length
)
1216 pack_threadid (char *pkt
, threadref
*id
)
1219 unsigned char *altid
;
1221 altid
= (unsigned char *) id
;
1222 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1224 pkt
= pack_hex_byte (pkt
, *altid
++);
1230 unpack_threadid (char *inbuf
, threadref
*id
)
1233 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1236 altref
= (char *) id
;
1238 while (inbuf
< limit
)
1240 x
= stubhex (*inbuf
++);
1241 y
= stubhex (*inbuf
++);
1242 *altref
++ = (x
<< 4) | y
;
1247 /* Externally, threadrefs are 64 bits but internally, they are still
1248 ints. This is due to a mismatch of specifications. We would like
1249 to use 64bit thread references internally. This is an adapter
1253 int_to_threadref (threadref
*id
, int value
)
1255 unsigned char *scan
;
1257 scan
= (unsigned char *) id
;
1263 *scan
++ = (value
>> 24) & 0xff;
1264 *scan
++ = (value
>> 16) & 0xff;
1265 *scan
++ = (value
>> 8) & 0xff;
1266 *scan
++ = (value
& 0xff);
1270 threadref_to_int (threadref
*ref
)
1273 unsigned char *scan
;
1275 scan
= (char *) ref
;
1279 value
= (value
<< 8) | ((*scan
++) & 0xff);
1284 copy_threadref (threadref
*dest
, threadref
*src
)
1287 unsigned char *csrc
, *cdest
;
1289 csrc
= (unsigned char *) src
;
1290 cdest
= (unsigned char *) dest
;
1297 threadmatch (threadref
*dest
, threadref
*src
)
1299 /* things are broken right now, so just assume we got a match */
1301 unsigned char *srcp
, *destp
;
1303 srcp
= (char *) src
;
1304 destp
= (char *) dest
;
1308 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1315 threadid:1, # always request threadid
1322 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1325 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1327 *pkt
++ = 'q'; /* Info Query */
1328 *pkt
++ = 'P'; /* process or thread info */
1329 pkt
= pack_int (pkt
, mode
); /* mode */
1330 pkt
= pack_threadid (pkt
, id
); /* threadid */
1331 *pkt
= '\0'; /* terminate */
1335 /* These values tag the fields in a thread info response packet */
1336 /* Tagging the fields allows us to request specific fields and to
1337 add more fields as time goes by */
1339 #define TAG_THREADID 1 /* Echo the thread identifier */
1340 #define TAG_EXISTS 2 /* Is this process defined enough to
1341 fetch registers and its stack */
1342 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1343 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
1344 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1348 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1349 struct gdb_ext_thread_info
*info
)
1354 char *limit
= pkt
+ PBUFSIZ
; /* plausable parsing limit */
1357 /* info->threadid = 0; FIXME: implement zero_threadref */
1359 info
->display
[0] = '\0';
1360 info
->shortname
[0] = '\0';
1361 info
->more_display
[0] = '\0';
1363 /* Assume the characters indicating the packet type have been stripped */
1364 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1365 pkt
= unpack_threadid (pkt
, &ref
);
1368 warning ("Incomplete response to threadinfo request\n");
1369 if (!threadmatch (&ref
, expectedref
))
1370 { /* This is an answer to a different request */
1371 warning ("ERROR RMT Thread info mismatch\n");
1374 copy_threadref (&info
->threadid
, &ref
);
1376 /* Loop on tagged fields , try to bail if somthing goes wrong */
1378 while ((pkt
< limit
) && mask
&& *pkt
) /* packets are terminated with nulls */
1380 pkt
= unpack_int (pkt
, &tag
); /* tag */
1381 pkt
= unpack_byte (pkt
, &length
); /* length */
1382 if (!(tag
& mask
)) /* tags out of synch with mask */
1384 warning ("ERROR RMT: threadinfo tag mismatch\n");
1388 if (tag
== TAG_THREADID
)
1392 warning ("ERROR RMT: length of threadid is not 16\n");
1396 pkt
= unpack_threadid (pkt
, &ref
);
1397 mask
= mask
& ~TAG_THREADID
;
1400 if (tag
== TAG_EXISTS
)
1402 info
->active
= stub_unpack_int (pkt
, length
);
1404 mask
= mask
& ~(TAG_EXISTS
);
1407 warning ("ERROR RMT: 'exists' length too long\n");
1413 if (tag
== TAG_THREADNAME
)
1415 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1416 mask
= mask
& ~TAG_THREADNAME
;
1419 if (tag
== TAG_DISPLAY
)
1421 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1422 mask
= mask
& ~TAG_DISPLAY
;
1425 if (tag
== TAG_MOREDISPLAY
)
1427 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1428 mask
= mask
& ~TAG_MOREDISPLAY
;
1431 warning ("ERROR RMT: unknown thread info tag\n");
1432 break; /* Not a tag we know about */
1438 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1439 struct gdb_ext_thread_info
*info
)
1442 char *threadinfo_pkt
= alloca (PBUFSIZ
);
1444 pack_threadinfo_request (threadinfo_pkt
, fieldset
, threadid
);
1445 putpkt (threadinfo_pkt
);
1446 getpkt (threadinfo_pkt
, PBUFSIZ
, 0);
1447 result
= remote_unpack_thread_info_response (threadinfo_pkt
+ 2, threadid
,
1452 /* Unfortunately, 61 bit thread-ids are bigger than the internal
1453 representation of a threadid. */
1456 adapt_remote_get_threadinfo (gdb_threadref
*ref
, int selection
,
1457 struct gdb_ext_thread_info
*info
)
1461 int_to_threadref (&lclref
, *ref
);
1462 return remote_get_threadinfo (&lclref
, selection
, info
);
1465 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1468 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1469 threadref
*nextthread
)
1471 *pkt
++ = 'q'; /* info query packet */
1472 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1473 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1474 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1475 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1480 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1483 parse_threadlist_response (char *pkt
, int result_limit
,
1484 threadref
*original_echo
, threadref
*resultlist
,
1488 int count
, resultcount
, done
;
1491 /* Assume the 'q' and 'M chars have been stripped. */
1492 limit
= pkt
+ (PBUFSIZ
- BUF_THREAD_ID_SIZE
); /* done parse past here */
1493 pkt
= unpack_byte (pkt
, &count
); /* count field */
1494 pkt
= unpack_nibble (pkt
, &done
);
1495 /* The first threadid is the argument threadid. */
1496 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1497 while ((count
-- > 0) && (pkt
< limit
))
1499 pkt
= unpack_threadid (pkt
, resultlist
++);
1500 if (resultcount
++ >= result_limit
)
1509 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1510 int *done
, int *result_count
, threadref
*threadlist
)
1512 static threadref echo_nextthread
;
1513 char *threadlist_packet
= alloca (PBUFSIZ
);
1514 char *t_response
= alloca (PBUFSIZ
);
1517 /* Trancate result limit to be smaller than the packet size */
1518 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= PBUFSIZ
)
1519 result_limit
= (PBUFSIZ
/ BUF_THREAD_ID_SIZE
) - 2;
1521 pack_threadlist_request (threadlist_packet
,
1522 startflag
, result_limit
, nextthread
);
1523 putpkt (threadlist_packet
);
1524 getpkt (t_response
, PBUFSIZ
, 0);
1527 parse_threadlist_response (t_response
+ 2, result_limit
, &echo_nextthread
,
1530 if (!threadmatch (&echo_nextthread
, nextthread
))
1532 /* FIXME: This is a good reason to drop the packet */
1533 /* Possably, there is a duplicate response */
1535 retransmit immediatly - race conditions
1536 retransmit after timeout - yes
1538 wait for packet, then exit
1540 warning ("HMM: threadlist did not echo arg thread, dropping it\n");
1541 return 0; /* I choose simply exiting */
1543 if (*result_count
<= 0)
1547 warning ("RMT ERROR : failed to get remote thread list\n");
1550 return result
; /* break; */
1552 if (*result_count
> result_limit
)
1555 warning ("RMT ERROR: threadlist response longer than requested\n");
1561 /* This is the interface between remote and threads, remotes upper interface */
1563 /* remote_find_new_threads retrieves the thread list and for each
1564 thread in the list, looks up the thread in GDB's internal list,
1565 ading the thread if it does not already exist. This involves
1566 getting partial thread lists from the remote target so, polling the
1567 quit_flag is required. */
1570 /* About this many threadisds fit in a packet. */
1572 #define MAXTHREADLISTRESULTS 32
1575 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1578 int done
, i
, result_count
;
1582 static threadref nextthread
;
1583 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1588 if (loopcount
++ > looplimit
)
1591 warning ("Remote fetch threadlist -infinite loop-\n");
1594 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1595 &done
, &result_count
, resultthreadlist
))
1600 /* clear for later iterations */
1602 /* Setup to resume next batch of thread references, set nextthread. */
1603 if (result_count
>= 1)
1604 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1606 while (result_count
--)
1607 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1614 remote_newthread_step (threadref
*ref
, void *context
)
1618 pid
= threadref_to_int (ref
);
1619 if (!in_thread_list (pid
))
1621 return 1; /* continue iterator */
1624 #define CRAZY_MAX_THREADS 1000
1627 remote_current_thread (int oldpid
)
1629 char *buf
= alloca (PBUFSIZ
);
1632 getpkt (buf
, PBUFSIZ
, 0);
1633 if (buf
[0] == 'Q' && buf
[1] == 'C')
1634 return strtol (&buf
[2], NULL
, 16);
1639 /* Find new threads for info threads command.
1640 * Original version, using John Metzler's thread protocol.
1644 remote_find_new_threads (void)
1646 remote_threadlist_iterator (remote_newthread_step
, 0,
1648 if (inferior_pid
== MAGIC_NULL_PID
) /* ack ack ack */
1649 inferior_pid
= remote_current_thread (inferior_pid
);
1653 * Find all threads for info threads command.
1654 * Uses new thread protocol contributed by Cisco.
1655 * Falls back and attempts to use the older method (above)
1656 * if the target doesn't respond to the new method.
1660 remote_threads_info (void)
1662 char *buf
= alloca (PBUFSIZ
);
1666 if (remote_desc
== 0) /* paranoia */
1667 error ("Command can only be used when connected to the remote target.");
1669 if (use_threadinfo_query
)
1671 putpkt ("qfThreadInfo");
1673 getpkt (bufp
, PBUFSIZ
, 0);
1674 if (bufp
[0] != '\0') /* q packet recognized */
1676 while (*bufp
++ == 'm') /* reply contains one or more TID */
1680 tid
= strtol (bufp
, &bufp
, 16);
1681 if (tid
!= 0 && !in_thread_list (tid
))
1684 while (*bufp
++ == ','); /* comma-separated list */
1685 putpkt ("qsThreadInfo");
1687 getpkt (bufp
, PBUFSIZ
, 0);
1693 /* Else fall back to old method based on jmetzler protocol. */
1694 use_threadinfo_query
= 0;
1695 remote_find_new_threads ();
1700 * Collect a descriptive string about the given thread.
1701 * The target may say anything it wants to about the thread
1702 * (typically info about its blocked / runnable state, name, etc.).
1703 * This string will appear in the info threads display.
1705 * Optional: targets are not required to implement this function.
1709 remote_threads_extra_info (struct thread_info
*tp
)
1714 struct gdb_ext_thread_info threadinfo
;
1715 static char display_buf
[100]; /* arbitrary... */
1716 char *bufp
= alloca (PBUFSIZ
);
1717 int n
= 0; /* position in display_buf */
1719 if (remote_desc
== 0) /* paranoia */
1720 internal_error (__FILE__
, __LINE__
,
1721 "remote_threads_extra_info");
1723 if (use_threadextra_query
)
1725 sprintf (bufp
, "qThreadExtraInfo,%x", tp
->pid
);
1727 getpkt (bufp
, PBUFSIZ
, 0);
1732 for (p
= display_buf
;
1733 p
< display_buf
+ sizeof(display_buf
) - 1 &&
1738 *p
= fromhex (bufp
[0]) * 16 + fromhex (bufp
[1]);
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
, tp
->pid
);
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_pid
= remote_current_thread (inferior_pid
);
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_pid
= MAGIC_NULL_PID
;
2138 /* Start the remote connection; if error (0), discard this target.
2139 In particular, if the user quits, be sure to discard it
2140 (we'd be in an inconsistent state otherwise). */
2141 if (!catch_errors (remote_start_remote
, NULL
,
2142 "Couldn't establish connection to remote target\n",
2151 /* tell the remote that we're using the extended protocol. */
2152 char *buf
= alloca (PBUFSIZ
);
2154 getpkt (buf
, PBUFSIZ
, 0);
2158 /* Just like remote_open but with asynchronous support. */
2160 remote_async_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2164 error ("To open a remote debug connection, you need to specify what\n\
2165 serial device is attached to the remote system\n\
2166 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2168 target_preopen (from_tty
);
2170 unpush_target (target
);
2172 remote_desc
= SERIAL_OPEN (name
);
2174 perror_with_name (name
);
2176 if (baud_rate
!= -1)
2178 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
2180 SERIAL_CLOSE (remote_desc
);
2181 perror_with_name (name
);
2185 SERIAL_RAW (remote_desc
);
2187 /* If there is something sitting in the buffer we might take it as a
2188 response to a command, which would be bad. */
2189 SERIAL_FLUSH_INPUT (remote_desc
);
2193 puts_filtered ("Remote debugging using ");
2194 puts_filtered (name
);
2195 puts_filtered ("\n");
2198 push_target (target
); /* Switch to using remote target now */
2200 init_all_packet_configs ();
2202 general_thread
= -2;
2203 continue_thread
= -2;
2205 /* Probe for ability to use "ThreadInfo" query, as required. */
2206 use_threadinfo_query
= 1;
2207 use_threadextra_query
= 1;
2209 /* Without this, some commands which require an active target (such
2210 as kill) won't work. This variable serves (at least) double duty
2211 as both the pid of the target process (if it has such), and as a
2212 flag indicating that a target is active. These functions should
2213 be split out into seperate variables, especially since GDB will
2214 someday have a notion of debugging several processes. */
2215 inferior_pid
= MAGIC_NULL_PID
;
2217 /* With this target we start out by owning the terminal. */
2218 remote_async_terminal_ours_p
= 1;
2220 /* FIXME: cagney/1999-09-23: During the initial connection it is
2221 assumed that the target is already ready and able to respond to
2222 requests. Unfortunately remote_start_remote() eventually calls
2223 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2224 around this. Eventually a mechanism that allows
2225 wait_for_inferior() to expect/get timeouts will be
2227 wait_forever_enabled_p
= 0;
2229 /* Start the remote connection; if error (0), discard this target.
2230 In particular, if the user quits, be sure to discard it
2231 (we'd be in an inconsistent state otherwise). */
2232 if (!catch_errors (remote_start_remote
, NULL
,
2233 "Couldn't establish connection to remote target\n",
2237 wait_forever_enabled_p
= 1;
2241 wait_forever_enabled_p
= 1;
2245 /* tell the remote that we're using the extended protocol. */
2246 char *buf
= alloca (PBUFSIZ
);
2248 getpkt (buf
, PBUFSIZ
, 0);
2252 /* This takes a program previously attached to and detaches it. After
2253 this is done, GDB can be used to debug some other program. We
2254 better not have left any breakpoints in the target program or it'll
2255 die when it hits one. */
2258 remote_detach (char *args
, int from_tty
)
2260 char *buf
= alloca (PBUFSIZ
);
2263 error ("Argument given to \"detach\" when remotely debugging.");
2265 /* Tell the remote target to detach. */
2267 remote_send (buf
, PBUFSIZ
);
2269 target_mourn_inferior ();
2271 puts_filtered ("Ending remote debugging.\n");
2275 /* Same as remote_detach, but with async support. */
2277 remote_async_detach (char *args
, int from_tty
)
2279 char *buf
= alloca (PBUFSIZ
);
2282 error ("Argument given to \"detach\" when remotely debugging.");
2284 /* Tell the remote target to detach. */
2286 remote_send (buf
, PBUFSIZ
);
2288 /* Unregister the file descriptor from the event loop. */
2289 if (target_is_async_p ())
2290 SERIAL_ASYNC (remote_desc
, NULL
, 0);
2292 target_mourn_inferior ();
2294 puts_filtered ("Ending remote debugging.\n");
2297 /* Convert hex digit A to a number. */
2302 if (a
>= '0' && a
<= '9')
2304 else if (a
>= 'a' && a
<= 'f')
2305 return a
- 'a' + 10;
2306 else if (a
>= 'A' && a
<= 'F')
2307 return a
- 'A' + 10;
2309 error ("Reply contains invalid hex digit %d", a
);
2312 /* Convert number NIB to a hex digit. */
2320 return 'a' + nib
- 10;
2323 /* Tell the remote machine to resume. */
2325 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2327 static int last_sent_step
;
2330 remote_resume (int pid
, int step
, enum target_signal siggnal
)
2332 char *buf
= alloca (PBUFSIZ
);
2336 set_thread (0, 0); /* run any thread */
2338 set_thread (pid
, 0); /* run this thread */
2340 last_sent_signal
= siggnal
;
2341 last_sent_step
= step
;
2343 /* A hook for when we need to do something at the last moment before
2345 if (target_resume_hook
)
2346 (*target_resume_hook
) ();
2349 /* The s/S/c/C packets do not return status. So if the target does
2350 not support the S or C packets, the debug agent returns an empty
2351 string which is detected in remote_wait(). This protocol defect
2352 is fixed in the e/E packets. */
2354 if (step
&& step_range_end
)
2356 /* If the target does not support the 'E' packet, we try the 'S'
2357 packet. Ideally we would fall back to the 'e' packet if that
2358 too is not supported. But that would require another copy of
2359 the code to issue the 'e' packet (and fall back to 's' if not
2360 supported) in remote_wait(). */
2362 if (siggnal
!= TARGET_SIGNAL_0
)
2364 if (remote_protocol_E
.support
!= PACKET_DISABLE
)
2368 *p
++ = tohex (((int) siggnal
>> 4) & 0xf);
2369 *p
++ = tohex (((int) siggnal
) & 0xf);
2371 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2373 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2377 getpkt (buf
, PBUFSIZ
, 0);
2379 if (packet_ok(buf
, &remote_protocol_E
) == PACKET_OK
)
2385 if (remote_protocol_e
.support
!= PACKET_DISABLE
)
2389 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2391 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2395 getpkt (buf
, PBUFSIZ
, 0);
2397 if (packet_ok(buf
, &remote_protocol_e
) == PACKET_OK
)
2403 if (siggnal
!= TARGET_SIGNAL_0
)
2405 buf
[0] = step
? 'S' : 'C';
2406 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2407 buf
[2] = tohex (((int) siggnal
) & 0xf);
2411 strcpy (buf
, step
? "s" : "c");
2416 /* Same as remote_resume, but with async support. */
2418 remote_async_resume (int pid
, int step
, enum target_signal siggnal
)
2420 char *buf
= alloca (PBUFSIZ
);
2424 set_thread (0, 0); /* run any thread */
2426 set_thread (pid
, 0); /* run this thread */
2428 last_sent_signal
= siggnal
;
2429 last_sent_step
= step
;
2431 /* A hook for when we need to do something at the last moment before
2433 if (target_resume_hook
)
2434 (*target_resume_hook
) ();
2436 /* The s/S/c/C packets do not return status. So if the target does
2437 not support the S or C packets, the debug agent returns an empty
2438 string which is detected in remote_wait(). This protocol defect
2439 is fixed in the e/E packets. */
2441 if (step
&& step_range_end
)
2443 /* If the target does not support the 'E' packet, we try the 'S'
2444 packet. Ideally we would fall back to the 'e' packet if that
2445 too is not supported. But that would require another copy of
2446 the code to issue the 'e' packet (and fall back to 's' if not
2447 supported) in remote_wait(). */
2449 if (siggnal
!= TARGET_SIGNAL_0
)
2451 if (remote_protocol_E
.support
!= PACKET_DISABLE
)
2455 *p
++ = tohex (((int) siggnal
>> 4) & 0xf);
2456 *p
++ = tohex (((int) siggnal
) & 0xf);
2458 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2460 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2464 getpkt (buf
, PBUFSIZ
, 0);
2466 if (packet_ok(buf
, &remote_protocol_E
) == PACKET_OK
)
2467 goto register_event_loop
;
2472 if (remote_protocol_e
.support
!= PACKET_DISABLE
)
2476 p
+= hexnumstr (p
, (ULONGEST
) step_range_start
);
2478 p
+= hexnumstr (p
, (ULONGEST
) step_range_end
);
2482 getpkt (buf
, PBUFSIZ
, 0);
2484 if (packet_ok(buf
, &remote_protocol_e
) == PACKET_OK
)
2485 goto register_event_loop
;
2490 if (siggnal
!= TARGET_SIGNAL_0
)
2492 buf
[0] = step
? 'S' : 'C';
2493 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2494 buf
[2] = tohex ((int) siggnal
& 0xf);
2498 strcpy (buf
, step
? "s" : "c");
2502 register_event_loop
:
2503 /* We are about to start executing the inferior, let's register it
2504 with the event loop. NOTE: this is the one place where all the
2505 execution commands end up. We could alternatively do this in each
2506 of the execution commands in infcmd.c.*/
2507 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2508 into infcmd.c in order to allow inferior function calls to work
2509 NOT asynchronously. */
2510 if (event_loop_p
&& target_can_async_p ())
2511 target_async (inferior_event_handler
, 0);
2512 /* Tell the world that the target is now executing. */
2513 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2514 this? Instead, should the client of target just assume (for
2515 async targets) that the target is going to start executing? Is
2516 this information already found in the continuation block? */
2517 if (target_is_async_p ())
2518 target_executing
= 1;
2522 /* Set up the signal handler for SIGINT, while the target is
2523 executing, ovewriting the 'regular' SIGINT signal handler. */
2525 initialize_sigint_signal_handler (void)
2527 sigint_remote_token
=
2528 create_async_signal_handler (async_remote_interrupt
, NULL
);
2529 signal (SIGINT
, handle_remote_sigint
);
2532 /* Signal handler for SIGINT, while the target is executing. */
2534 handle_remote_sigint (int sig
)
2536 signal (sig
, handle_remote_sigint_twice
);
2537 sigint_remote_twice_token
=
2538 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2539 mark_async_signal_handler_wrapper (sigint_remote_token
);
2542 /* Signal handler for SIGINT, installed after SIGINT has already been
2543 sent once. It will take effect the second time that the user sends
2546 handle_remote_sigint_twice (int sig
)
2548 signal (sig
, handle_sigint
);
2549 sigint_remote_twice_token
=
2550 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2551 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2554 /* Perform the real interruption of the target execution, in response
2557 async_remote_interrupt (gdb_client_data arg
)
2560 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2565 /* Perform interrupt, if the first attempt did not succeed. Just give
2566 up on the target alltogether. */
2568 async_remote_interrupt_twice (gdb_client_data arg
)
2571 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2572 /* Do something only if the target was not killed by the previous
2574 if (target_executing
)
2577 signal (SIGINT
, handle_remote_sigint
);
2581 /* Reinstall the usual SIGINT handlers, after the target has
2584 cleanup_sigint_signal_handler (void *dummy
)
2586 signal (SIGINT
, handle_sigint
);
2587 if (sigint_remote_twice_token
)
2588 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_twice_token
);
2589 if (sigint_remote_token
)
2590 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_token
);
2593 /* Send ^C to target to halt it. Target will respond, and send us a
2595 static void (*ofunc
) (int);
2597 /* The command line interface's stop routine. This function is installed
2598 as a signal handler for SIGINT. The first time a user requests a
2599 stop, we call remote_stop to send a break or ^C. If there is no
2600 response from the target (it didn't stop when the user requested it),
2601 we ask the user if he'd like to detach from the target. */
2603 remote_interrupt (int signo
)
2605 /* If this doesn't work, try more severe steps. */
2606 signal (signo
, remote_interrupt_twice
);
2609 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2614 /* The user typed ^C twice. */
2617 remote_interrupt_twice (int signo
)
2619 signal (signo
, ofunc
);
2621 signal (signo
, remote_interrupt
);
2624 /* This is the generic stop called via the target vector. When a target
2625 interrupt is requested, either by the command line or the GUI, we
2626 will eventually end up here. */
2630 /* Send a break or a ^C, depending on user preference. */
2632 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2635 SERIAL_SEND_BREAK (remote_desc
);
2637 SERIAL_WRITE (remote_desc
, "\003", 1);
2640 /* Ask the user what to do when an interrupt is received. */
2643 interrupt_query (void)
2645 target_terminal_ours ();
2647 if (query ("Interrupted while waiting for the program.\n\
2648 Give up (and stop debugging it)? "))
2650 target_mourn_inferior ();
2651 return_to_top_level (RETURN_QUIT
);
2654 target_terminal_inferior ();
2657 /* Enable/disable target terminal ownership. Most targets can use
2658 terminal groups to control terminal ownership. Remote targets are
2659 different in that explicit transfer of ownership to/from GDB/target
2663 remote_async_terminal_inferior (void)
2665 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2666 sync_execution here. This function should only be called when
2667 GDB is resuming the inferior in the forground. A background
2668 resume (``run&'') should leave GDB in control of the terminal and
2669 consequently should not call this code. */
2670 if (!sync_execution
)
2672 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2673 calls target_terminal_*() idenpotent. The event-loop GDB talking
2674 to an asynchronous target with a synchronous command calls this
2675 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2676 stops trying to transfer the terminal to the target when it
2677 shouldn't this guard can go away. */
2678 if (!remote_async_terminal_ours_p
)
2680 delete_file_handler (input_fd
);
2681 remote_async_terminal_ours_p
= 0;
2682 initialize_sigint_signal_handler ();
2683 /* NOTE: At this point we could also register our selves as the
2684 recipient of all input. Any characters typed could then be
2685 passed on down to the target. */
2689 remote_async_terminal_ours (void)
2691 /* See FIXME in remote_async_terminal_inferior. */
2692 if (!sync_execution
)
2694 /* See FIXME in remote_async_terminal_inferior. */
2695 if (remote_async_terminal_ours_p
)
2697 cleanup_sigint_signal_handler (NULL
);
2698 add_file_handler (input_fd
, stdin_event_handler
, 0);
2699 remote_async_terminal_ours_p
= 1;
2702 /* If nonzero, ignore the next kill. */
2707 remote_console_output (char *msg
)
2711 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
2714 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
2717 fputs_unfiltered (tb
, gdb_stdtarg
);
2719 gdb_flush (gdb_stdtarg
);
2722 /* Wait until the remote machine stops, then return,
2723 storing status in STATUS just as `wait' would.
2724 Returns "pid", which in the case of a multi-threaded
2725 remote OS, is the thread-id. */
2728 remote_wait (int pid
, struct target_waitstatus
*status
)
2730 unsigned char *buf
= alloca (PBUFSIZ
);
2731 int thread_num
= -1;
2733 status
->kind
= TARGET_WAITKIND_EXITED
;
2734 status
->value
.integer
= 0;
2740 ofunc
= signal (SIGINT
, remote_interrupt
);
2741 getpkt (buf
, PBUFSIZ
, 1);
2742 signal (SIGINT
, ofunc
);
2744 /* This is a hook for when we need to do something (perhaps the
2745 collection of trace data) every time the target stops. */
2746 if (target_wait_loop_hook
)
2747 (*target_wait_loop_hook
) ();
2751 case 'E': /* Error of some sort */
2752 warning ("Remote failure reply: %s", buf
);
2754 case 'T': /* Status with PC, SP, FP, ... */
2758 char* regs
= (char*) alloca (MAX_REGISTER_RAW_SIZE
);
2760 /* Expedited reply, containing Signal, {regno, reg} repeat */
2761 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2763 n... = register number
2764 r... = register contents
2766 p
= &buf
[3]; /* after Txx */
2773 /* Read the register number */
2774 regno
= strtol ((const char *) p
, &p_temp
, 16);
2775 p1
= (unsigned char *) p_temp
;
2777 if (p1
== p
) /* No register number present here */
2779 p1
= (unsigned char *) strchr ((const char *) p
, ':');
2781 warning ("Malformed packet(a) (missing colon): %s\n\
2784 if (strncmp ((const char *) p
, "thread", p1
- p
) == 0)
2786 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2787 record_currthread (thread_num
);
2788 p
= (unsigned char *) p_temp
;
2796 warning ("Malformed packet(b) (missing colon): %s\n\
2800 if (regno
>= NUM_REGS
)
2801 warning ("Remote sent bad register number %ld: %s\n\
2805 for (i
= 0; i
< REGISTER_RAW_SIZE (regno
); i
++)
2807 if (p
[0] == 0 || p
[1] == 0)
2808 warning ("Remote reply is too short: %s", buf
);
2809 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
2812 supply_register (regno
, regs
);
2817 warning ("Remote register badly formatted: %s", buf
);
2818 warning (" here: %s", p
);
2823 case 'S': /* Old style status, just signal only */
2824 status
->kind
= TARGET_WAITKIND_STOPPED
;
2825 status
->value
.sig
= (enum target_signal
)
2826 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2830 /* Export Cisco kernel mode as a convenience variable
2831 (so that it can be used in the GDB prompt if desired). */
2833 if (cisco_kernel_mode
== 1)
2834 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2835 value_from_string ("PDEBUG-"));
2836 cisco_kernel_mode
= 0;
2837 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2838 record_currthread (thread_num
);
2840 else if (buf
[3] == 'k')
2842 /* Export Cisco kernel mode as a convenience variable
2843 (so that it can be used in the GDB prompt if desired). */
2845 if (cisco_kernel_mode
== 1)
2846 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
2847 value_from_string ("KDEBUG-"));
2848 cisco_kernel_mode
= 1;
2851 case 'N': /* Cisco special: status and offsets */
2853 bfd_vma text_addr
, data_addr
, bss_addr
;
2854 bfd_signed_vma text_off
, data_off
, bss_off
;
2857 status
->kind
= TARGET_WAITKIND_STOPPED
;
2858 status
->value
.sig
= (enum target_signal
)
2859 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2861 if (symfile_objfile
== NULL
)
2863 warning ("Relocation packet received with no symbol file. \
2868 /* Relocate object file. Buffer format is NAATT;DD;BB
2869 * where AA is the signal number, TT is the new text
2870 * address, DD * is the new data address, and BB is the
2871 * new bss address. */
2874 text_addr
= strtoul (p
, (char **) &p1
, 16);
2875 if (p1
== p
|| *p1
!= ';')
2876 warning ("Malformed relocation packet: Packet '%s'", buf
);
2878 data_addr
= strtoul (p
, (char **) &p1
, 16);
2879 if (p1
== p
|| *p1
!= ';')
2880 warning ("Malformed relocation packet: Packet '%s'", buf
);
2882 bss_addr
= strtoul (p
, (char **) &p1
, 16);
2884 warning ("Malformed relocation packet: Packet '%s'", buf
);
2886 if (remote_cisco_section_offsets (text_addr
, data_addr
, bss_addr
,
2887 &text_off
, &data_off
, &bss_off
)
2889 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
2890 remote_cisco_objfile_relocate (text_off
, data_off
, bss_off
);
2894 case 'W': /* Target exited */
2896 /* The remote process exited. */
2897 status
->kind
= TARGET_WAITKIND_EXITED
;
2898 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
2902 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
2903 status
->value
.sig
= (enum target_signal
)
2904 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2908 case 'O': /* Console output */
2909 remote_console_output (buf
+ 1);
2912 if (last_sent_signal
!= TARGET_SIGNAL_0
)
2914 /* Zero length reply means that we tried 'S' or 'C' and
2915 the remote system doesn't support it. */
2916 target_terminal_ours_for_output ();
2918 ("Can't send signals to this remote system. %s not sent.\n",
2919 target_signal_to_name (last_sent_signal
));
2920 last_sent_signal
= TARGET_SIGNAL_0
;
2921 target_terminal_inferior ();
2923 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
2924 putpkt ((char *) buf
);
2927 /* else fallthrough */
2929 warning ("Invalid remote reply: %s", buf
);
2934 if (thread_num
!= -1)
2938 return inferior_pid
;
2941 /* Async version of remote_wait. */
2943 remote_async_wait (int pid
, struct target_waitstatus
*status
)
2945 unsigned char *buf
= alloca (PBUFSIZ
);
2946 int thread_num
= -1;
2948 status
->kind
= TARGET_WAITKIND_EXITED
;
2949 status
->value
.integer
= 0;
2955 if (!target_is_async_p ())
2956 ofunc
= signal (SIGINT
, remote_interrupt
);
2957 /* FIXME: cagney/1999-09-27: If we're in async mode we should
2958 _never_ wait for ever -> test on target_is_async_p().
2959 However, before we do that we need to ensure that the caller
2960 knows how to take the target into/out of async mode. */
2961 getpkt (buf
, PBUFSIZ
, wait_forever_enabled_p
);
2962 if (!target_is_async_p ())
2963 signal (SIGINT
, ofunc
);
2965 /* This is a hook for when we need to do something (perhaps the
2966 collection of trace data) every time the target stops. */
2967 if (target_wait_loop_hook
)
2968 (*target_wait_loop_hook
) ();
2972 case 'E': /* Error of some sort */
2973 warning ("Remote failure reply: %s", buf
);
2975 case 'T': /* Status with PC, SP, FP, ... */
2979 char* regs
= (char*) alloca (MAX_REGISTER_RAW_SIZE
);
2981 /* Expedited reply, containing Signal, {regno, reg} repeat */
2982 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2984 n... = register number
2985 r... = register contents
2987 p
= &buf
[3]; /* after Txx */
2994 /* Read the register number */
2995 regno
= strtol ((const char *) p
, &p_temp
, 16);
2996 p1
= (unsigned char *) p_temp
;
2998 if (p1
== p
) /* No register number present here */
3000 p1
= (unsigned char *) strchr ((const char *) p
, ':');
3002 warning ("Malformed packet(a) (missing colon): %s\n\
3005 if (strncmp ((const char *) p
, "thread", p1
- p
) == 0)
3007 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3008 record_currthread (thread_num
);
3009 p
= (unsigned char *) p_temp
;
3017 warning ("Malformed packet(b) (missing colon): %s\n\
3021 if (regno
>= NUM_REGS
)
3022 warning ("Remote sent bad register number %ld: %s\n\
3026 for (i
= 0; i
< REGISTER_RAW_SIZE (regno
); i
++)
3028 if (p
[0] == 0 || p
[1] == 0)
3029 warning ("Remote reply is too short: %s", buf
);
3030 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3033 supply_register (regno
, regs
);
3038 warning ("Remote register badly formatted: %s", buf
);
3039 warning (" here: %s", p
);
3044 case 'S': /* Old style status, just signal only */
3045 status
->kind
= TARGET_WAITKIND_STOPPED
;
3046 status
->value
.sig
= (enum target_signal
)
3047 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3051 /* Export Cisco kernel mode as a convenience variable
3052 (so that it can be used in the GDB prompt if desired). */
3054 if (cisco_kernel_mode
== 1)
3055 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3056 value_from_string ("PDEBUG-"));
3057 cisco_kernel_mode
= 0;
3058 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3059 record_currthread (thread_num
);
3061 else if (buf
[3] == 'k')
3063 /* Export Cisco kernel mode as a convenience variable
3064 (so that it can be used in the GDB prompt if desired). */
3066 if (cisco_kernel_mode
== 1)
3067 set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
3068 value_from_string ("KDEBUG-"));
3069 cisco_kernel_mode
= 1;
3072 case 'N': /* Cisco special: status and offsets */
3074 bfd_vma text_addr
, data_addr
, bss_addr
;
3075 bfd_signed_vma text_off
, data_off
, bss_off
;
3078 status
->kind
= TARGET_WAITKIND_STOPPED
;
3079 status
->value
.sig
= (enum target_signal
)
3080 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3082 if (symfile_objfile
== NULL
)
3084 warning ("Relocation packet recieved with no symbol file. \
3089 /* Relocate object file. Buffer format is NAATT;DD;BB
3090 * where AA is the signal number, TT is the new text
3091 * address, DD * is the new data address, and BB is the
3092 * new bss address. */
3095 text_addr
= strtoul (p
, (char **) &p1
, 16);
3096 if (p1
== p
|| *p1
!= ';')
3097 warning ("Malformed relocation packet: Packet '%s'", buf
);
3099 data_addr
= strtoul (p
, (char **) &p1
, 16);
3100 if (p1
== p
|| *p1
!= ';')
3101 warning ("Malformed relocation packet: Packet '%s'", buf
);
3103 bss_addr
= strtoul (p
, (char **) &p1
, 16);
3105 warning ("Malformed relocation packet: Packet '%s'", buf
);
3107 if (remote_cisco_section_offsets (text_addr
, data_addr
, bss_addr
,
3108 &text_off
, &data_off
, &bss_off
)
3110 if (text_off
!= 0 || data_off
!= 0 || bss_off
!= 0)
3111 remote_cisco_objfile_relocate (text_off
, data_off
, bss_off
);
3115 case 'W': /* Target exited */
3117 /* The remote process exited. */
3118 status
->kind
= TARGET_WAITKIND_EXITED
;
3119 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3123 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3124 status
->value
.sig
= (enum target_signal
)
3125 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3129 case 'O': /* Console output */
3130 remote_console_output (buf
+ 1);
3131 /* Return immediately to the event loop. The event loop will
3132 still be waiting on the inferior afterwards. */
3133 status
->kind
= TARGET_WAITKIND_IGNORE
;
3136 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3138 /* Zero length reply means that we tried 'S' or 'C' and
3139 the remote system doesn't support it. */
3140 target_terminal_ours_for_output ();
3142 ("Can't send signals to this remote system. %s not sent.\n",
3143 target_signal_to_name (last_sent_signal
));
3144 last_sent_signal
= TARGET_SIGNAL_0
;
3145 target_terminal_inferior ();
3147 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3148 putpkt ((char *) buf
);
3151 /* else fallthrough */
3153 warning ("Invalid remote reply: %s", buf
);
3158 if (thread_num
!= -1)
3162 return inferior_pid
;
3165 /* Number of bytes of registers this stub implements. */
3167 static int register_bytes_found
;
3169 /* Read the remote registers into the block REGS. */
3170 /* Currently we just read all the registers, so we don't use regno. */
3174 remote_fetch_registers (int regno
)
3176 char *buf
= alloca (PBUFSIZ
);
3179 char *regs
= alloca (REGISTER_BYTES
);
3181 set_thread (inferior_pid
, 1);
3184 remote_send (buf
, PBUFSIZ
);
3186 /* Save the size of the packet sent to us by the target. Its used
3187 as a heuristic when determining the max size of packets that the
3188 target can safely receive. */
3189 if (actual_register_packet_size
== 0)
3190 actual_register_packet_size
= strlen (buf
);
3192 /* Unimplemented registers read as all bits zero. */
3193 memset (regs
, 0, REGISTER_BYTES
);
3195 /* We can get out of synch in various cases. If the first character
3196 in the buffer is not a hex character, assume that has happened
3197 and try to fetch another packet to read. */
3198 while ((buf
[0] < '0' || buf
[0] > '9')
3199 && (buf
[0] < 'a' || buf
[0] > 'f')
3200 && buf
[0] != 'x') /* New: unavailable register value */
3203 fprintf_unfiltered (gdb_stdlog
,
3204 "Bad register packet; fetching a new packet\n");
3205 getpkt (buf
, PBUFSIZ
, 0);
3208 /* Reply describes registers byte by byte, each byte encoded as two
3209 hex characters. Suck them all up, then supply them to the
3210 register cacheing/storage mechanism. */
3213 for (i
= 0; i
< REGISTER_BYTES
; i
++)
3219 warning ("Remote reply is of odd length: %s", buf
);
3220 /* Don't change register_bytes_found in this case, and don't
3221 print a second warning. */
3224 if (p
[0] == 'x' && p
[1] == 'x')
3225 regs
[i
] = 0; /* 'x' */
3227 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3231 if (i
!= register_bytes_found
)
3233 register_bytes_found
= i
;
3234 if (REGISTER_BYTES_OK_P ()
3235 && !REGISTER_BYTES_OK (i
))
3236 warning ("Remote reply is too short: %s", buf
);
3240 for (i
= 0; i
< NUM_REGS
; i
++)
3242 supply_register (i
, ®s
[REGISTER_BYTE (i
)]);
3243 if (buf
[REGISTER_BYTE (i
) * 2] == 'x')
3244 set_register_cached (i
, -1);
3248 /* Prepare to store registers. Since we may send them all (using a
3249 'G' request), we have to read out the ones we don't want to change
3253 remote_prepare_to_store (void)
3255 /* Make sure the entire registers array is valid. */
3256 switch (remote_protocol_P
.support
)
3258 case PACKET_DISABLE
:
3259 case PACKET_SUPPORT_UNKNOWN
:
3260 read_register_bytes (0, (char *) NULL
, REGISTER_BYTES
);
3267 /* Helper: Attempt to store REGNO using the P packet. Return fail IFF
3268 packet was not recognized. */
3271 store_register_using_P (int regno
)
3273 /* Try storing a single register. */
3274 char *buf
= alloca (PBUFSIZ
);
3279 sprintf (buf
, "P%x=", regno
);
3280 p
= buf
+ strlen (buf
);
3281 regp
= register_buffer (regno
);
3282 for (i
= 0; i
< REGISTER_RAW_SIZE (regno
); ++i
)
3284 *p
++ = tohex ((regp
[i
] >> 4) & 0xf);
3285 *p
++ = tohex (regp
[i
] & 0xf);
3288 remote_send (buf
, PBUFSIZ
);
3290 return buf
[0] != '\0';
3294 /* Store register REGNO, or all registers if REGNO == -1, from the contents
3295 of the register cache buffer. FIXME: ignores errors. */
3298 remote_store_registers (int regno
)
3300 char *buf
= alloca (PBUFSIZ
);
3305 set_thread (inferior_pid
, 1);
3309 switch (remote_protocol_P
.support
)
3311 case PACKET_DISABLE
:
3314 if (store_register_using_P (regno
))
3317 error ("Protocol error: P packet not recognized by stub");
3318 case PACKET_SUPPORT_UNKNOWN
:
3319 if (store_register_using_P (regno
))
3321 /* The stub recognized the 'P' packet. Remember this. */
3322 remote_protocol_P
.support
= PACKET_ENABLE
;
3327 /* The stub does not support the 'P' packet. Use 'G'
3328 instead, and don't try using 'P' in the future (it
3329 will just waste our time). */
3330 remote_protocol_P
.support
= PACKET_DISABLE
;
3338 /* Command describes registers byte by byte,
3339 each byte encoded as two hex characters. */
3341 regs
= register_buffer (-1);
3343 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3344 for (i
= 0; i
< register_bytes_found
; i
++)
3346 *p
++ = tohex ((regs
[i
] >> 4) & 0xf);
3347 *p
++ = tohex (regs
[i
] & 0xf);
3351 remote_send (buf
, PBUFSIZ
);
3355 /* Return the number of hex digits in num. */
3358 hexnumlen (ULONGEST num
)
3362 for (i
= 0; num
!= 0; i
++)
3368 /* Set BUF to the minimum number of hex digits representing NUM. */
3371 hexnumstr (char *buf
, ULONGEST num
)
3373 int len
= hexnumlen (num
);
3374 return hexnumnstr (buf
, num
, len
);
3378 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3381 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3387 for (i
= width
- 1; i
>= 0; i
--)
3389 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3396 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3399 remote_address_masked (CORE_ADDR addr
)
3401 if (remote_address_size
> 0
3402 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3404 /* Only create a mask when that mask can safely be constructed
3405 in a ULONGEST variable. */
3407 mask
= (mask
<< remote_address_size
) - 1;
3413 /* Determine whether the remote target supports binary downloading.
3414 This is accomplished by sending a no-op memory write of zero length
3415 to the target at the specified address. It does not suffice to send
3416 the whole packet, since many stubs strip the eighth bit and subsequently
3417 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3419 NOTE: This can still lose if the serial line is not eight-bit
3420 clean. In cases like this, the user should clear "remote
3424 check_binary_download (CORE_ADDR addr
)
3426 switch (remote_protocol_binary_download
.support
)
3428 case PACKET_DISABLE
:
3432 case PACKET_SUPPORT_UNKNOWN
:
3434 char *buf
= alloca (PBUFSIZ
);
3439 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3441 p
+= hexnumstr (p
, (ULONGEST
) 0);
3445 putpkt_binary (buf
, (int) (p
- buf
));
3446 getpkt (buf
, PBUFSIZ
, 0);
3451 fprintf_unfiltered (gdb_stdlog
,
3452 "binary downloading NOT suppported by target\n");
3453 remote_protocol_binary_download
.support
= PACKET_DISABLE
;
3458 fprintf_unfiltered (gdb_stdlog
,
3459 "binary downloading suppported by target\n");
3460 remote_protocol_binary_download
.support
= PACKET_ENABLE
;
3467 /* Write memory data directly to the remote machine.
3468 This does not inform the data cache; the data cache uses this.
3469 MEMADDR is the address in the remote memory space.
3470 MYADDR is the address of the buffer in our space.
3471 LEN is the number of bytes.
3473 Returns number of bytes transferred, or 0 (setting errno) for
3474 error. Only transfer a single packet. */
3477 remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3480 int max_buf_size
; /* Max size of packet output buffer */
3482 unsigned char *plen
;
3488 /* Verify that the target can support a binary download */
3489 check_binary_download (memaddr
);
3491 /* Determine the max packet size. */
3492 max_buf_size
= get_memory_write_packet_size ();
3493 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3494 buf
= alloca (sizeof_buf
);
3496 /* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */
3497 max_buf_size
-= 2 + hexnumlen (memaddr
+ len
- 1) + 1 + hexnumlen (len
) + 4;
3499 /* construct "M"<memaddr>","<len>":" */
3500 /* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */
3503 /* Append [XM]. Compute a best guess of the number of bytes
3504 actually transfered. */
3505 switch (remote_protocol_binary_download
.support
)
3509 /* Best guess at number of bytes that will fit. */
3510 todo
= min (len
, max_buf_size
);
3512 case PACKET_DISABLE
:
3514 /* num bytes that will fit */
3515 todo
= min (len
, max_buf_size
/ 2);
3517 case PACKET_SUPPORT_UNKNOWN
:
3518 internal_error (__FILE__
, __LINE__
,
3519 "remote_write_bytes: bad internal state");
3521 internal_error (__FILE__
, __LINE__
, "bad switch");
3524 /* Append <memaddr> */
3525 memaddr
= remote_address_masked (memaddr
);
3526 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3529 /* Append <len>. Retain the location/size of <len>. It may
3530 need to be adjusted once the packet body has been created. */
3532 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
3537 /* Append the packet body. */
3538 switch (remote_protocol_binary_download
.support
)
3541 /* Binary mode. Send target system values byte by byte, in
3542 increasing byte addresses. Only escape certain critical
3545 (nr_bytes
< todo
) && (p
- buf
) < (max_buf_size
- 2);
3548 switch (myaddr
[nr_bytes
] & 0xff)
3553 /* These must be escaped */
3555 *p
++ = (myaddr
[nr_bytes
] & 0xff) ^ 0x20;
3558 *p
++ = myaddr
[nr_bytes
] & 0xff;
3562 if (nr_bytes
< todo
)
3564 /* Escape chars have filled up the buffer prematurely,
3565 and we have actually sent fewer bytes than planned.
3566 Fix-up the length field of the packet. Use the same
3567 number of characters as before. */
3569 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
3570 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
3573 case PACKET_DISABLE
:
3574 /* Normal mode: Send target system values byte by byte, in
3575 increasing byte addresses. Each byte is encoded as a two hex
3577 for (nr_bytes
= 0; nr_bytes
< todo
; nr_bytes
++)
3579 *p
++ = tohex ((myaddr
[nr_bytes
] >> 4) & 0xf);
3580 *p
++ = tohex (myaddr
[nr_bytes
] & 0xf);
3584 case PACKET_SUPPORT_UNKNOWN
:
3585 internal_error (__FILE__
, __LINE__
,
3586 "remote_write_bytes: bad internal state");
3588 internal_error (__FILE__
, __LINE__
, "bad switch");
3591 putpkt_binary (buf
, (int) (p
- buf
));
3592 getpkt (buf
, sizeof_buf
, 0);
3596 /* There is no correspondance between what the remote protocol
3597 uses for errors and errno codes. We would like a cleaner way
3598 of representing errors (big enough to include errno codes,
3599 bfd_error codes, and others). But for now just return EIO. */
3604 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3605 bytes than we'd planned. */
3609 /* Read memory data directly from the remote machine.
3610 This does not use the data cache; the data cache uses this.
3611 MEMADDR is the address in the remote memory space.
3612 MYADDR is the address of the buffer in our space.
3613 LEN is the number of bytes.
3615 Returns number of bytes transferred, or 0 for error. */
3617 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3618 remote targets) shouldn't attempt to read the entire buffer.
3619 Instead it should read a single packet worth of data and then
3620 return the byte size of that packet to the caller. The caller (its
3621 caller and its callers caller ;-) already contains code for
3622 handling partial reads. */
3625 remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3628 int max_buf_size
; /* Max size of packet output buffer */
3632 /* Create a buffer big enough for this packet. */
3633 max_buf_size
= get_memory_read_packet_size ();
3634 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3635 buf
= alloca (sizeof_buf
);
3644 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
3646 /* construct "m"<memaddr>","<len>" */
3647 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3648 memaddr
= remote_address_masked (memaddr
);
3651 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3653 p
+= hexnumstr (p
, (ULONGEST
) todo
);
3657 getpkt (buf
, sizeof_buf
, 0);
3661 /* There is no correspondance between what the remote protocol uses
3662 for errors and errno codes. We would like a cleaner way of
3663 representing errors (big enough to include errno codes, bfd_error
3664 codes, and others). But for now just return EIO. */
3669 /* Reply describes memory byte by byte,
3670 each byte encoded as two hex characters. */
3673 for (i
= 0; i
< todo
; i
++)
3675 if (p
[0] == 0 || p
[1] == 0)
3676 /* Reply is short. This means that we were able to read
3677 only part of what we wanted to. */
3678 return i
+ (origlen
- len
);
3679 myaddr
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3689 /* Read or write LEN bytes from inferior memory at MEMADDR,
3690 transferring to or from debugger address BUFFER. Write to inferior if
3691 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3692 for error. TARGET is unused. */
3696 remote_xfer_memory (CORE_ADDR mem_addr
, char *buffer
, int mem_len
,
3698 struct mem_attrib
*attrib ATTRIBUTE_UNUSED
,
3699 struct target_ops
*target
)
3701 CORE_ADDR targ_addr
;
3705 REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr
, mem_len
, &targ_addr
, &targ_len
);
3710 res
= remote_write_bytes (targ_addr
, buffer
, targ_len
);
3712 res
= remote_read_bytes (targ_addr
, buffer
, targ_len
);
3719 /* Enable after 4.12. */
3722 remote_search (int len
, char *data
, char *mask
, CORE_ADDR startaddr
,
3723 int increment
, CORE_ADDR lorange
, CORE_ADDR hirange
,
3724 CORE_ADDR
*addr_found
, char *data_found
)
3726 if (increment
== -4 && len
== 4)
3728 long mask_long
, data_long
;
3729 long data_found_long
;
3730 CORE_ADDR addr_we_found
;
3731 char *buf
= alloca (PBUFSIZ
);
3732 long returned_long
[2];
3735 mask_long
= extract_unsigned_integer (mask
, len
);
3736 data_long
= extract_unsigned_integer (data
, len
);
3737 sprintf (buf
, "t%x:%x,%x", startaddr
, data_long
, mask_long
);
3739 getpkt (buf
, PBUFSIZ
, 0);
3742 /* The stub doesn't support the 't' request. We might want to
3743 remember this fact, but on the other hand the stub could be
3744 switched on us. Maybe we should remember it only until
3745 the next "target remote". */
3746 generic_search (len
, data
, mask
, startaddr
, increment
, lorange
,
3747 hirange
, addr_found
, data_found
);
3752 /* There is no correspondance between what the remote protocol uses
3753 for errors and errno codes. We would like a cleaner way of
3754 representing errors (big enough to include errno codes, bfd_error
3755 codes, and others). But for now just use EIO. */
3756 memory_error (EIO
, startaddr
);
3759 while (*p
!= '\0' && *p
!= ',')
3760 addr_we_found
= (addr_we_found
<< 4) + fromhex (*p
++);
3762 error ("Protocol error: short return for search");
3764 data_found_long
= 0;
3765 while (*p
!= '\0' && *p
!= ',')
3766 data_found_long
= (data_found_long
<< 4) + fromhex (*p
++);
3767 /* Ignore anything after this comma, for future extensions. */
3769 if (addr_we_found
< lorange
|| addr_we_found
>= hirange
)
3775 *addr_found
= addr_we_found
;
3776 *data_found
= store_unsigned_integer (data_we_found
, len
);
3779 generic_search (len
, data
, mask
, startaddr
, increment
, lorange
,
3780 hirange
, addr_found
, data_found
);
3785 remote_files_info (struct target_ops
*ignore
)
3787 puts_filtered ("Debugging a target over a serial line.\n");
3790 /* Stuff for dealing with the packets which are part of this protocol.
3791 See comment at top of file for details. */
3793 /* Read a single character from the remote end, masking it down to 7 bits. */
3796 readchar (int timeout
)
3800 ch
= SERIAL_READCHAR (remote_desc
, timeout
);
3805 switch ((enum serial_rc
) ch
)
3808 target_mourn_inferior ();
3809 error ("Remote connection closed");
3812 perror_with_name ("Remote communication error");
3814 case SERIAL_TIMEOUT
:
3820 /* Send the command in BUF to the remote machine, and read the reply
3821 into BUF. Report an error if we get an error reply. */
3824 remote_send (char *buf
,
3828 getpkt (buf
, sizeof_buf
, 0);
3831 error ("Remote failure reply: %s", buf
);
3834 /* Display a null-terminated packet on stdout, for debugging, using C
3838 print_packet (char *buf
)
3840 puts_filtered ("\"");
3841 fputstr_filtered (buf
, '"', gdb_stdout
);
3842 puts_filtered ("\"");
3848 return putpkt_binary (buf
, strlen (buf
));
3851 /* Send a packet to the remote machine, with error checking. The data
3852 of the packet is in BUF. The string in BUF can be at most PBUFSIZ - 5
3853 to account for the $, # and checksum, and for a possible /0 if we are
3854 debugging (remote_debug) and want to print the sent packet as a string */
3857 putpkt_binary (char *buf
, int cnt
)
3860 unsigned char csum
= 0;
3861 char *buf2
= alloca (cnt
+ 6);
3862 long sizeof_junkbuf
= PBUFSIZ
;
3863 char *junkbuf
= alloca (sizeof_junkbuf
);
3869 /* Copy the packet into buffer BUF2, encapsulating it
3870 and giving it a checksum. */
3875 for (i
= 0; i
< cnt
; i
++)
3881 *p
++ = tohex ((csum
>> 4) & 0xf);
3882 *p
++ = tohex (csum
& 0xf);
3884 /* Send it over and over until we get a positive ack. */
3888 int started_error_output
= 0;
3893 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
3894 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
3895 fprintf_unfiltered (gdb_stdlog
, "...");
3896 gdb_flush (gdb_stdlog
);
3898 if (SERIAL_WRITE (remote_desc
, buf2
, p
- buf2
))
3899 perror_with_name ("putpkt: write failed");
3901 /* read until either a timeout occurs (-2) or '+' is read */
3904 ch
= readchar (remote_timeout
);
3912 case SERIAL_TIMEOUT
:
3914 if (started_error_output
)
3916 putchar_unfiltered ('\n');
3917 started_error_output
= 0;
3926 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
3930 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
3931 case SERIAL_TIMEOUT
:
3935 break; /* Retransmit buffer */
3939 fprintf_unfiltered (gdb_stdlog
, "Packet instead of Ack, ignoring it\n");
3940 /* It's probably an old response, and we're out of sync.
3941 Just gobble up the packet and ignore it. */
3942 read_frame (junkbuf
, sizeof_junkbuf
);
3943 continue; /* Now, go look for + */
3948 if (!started_error_output
)
3950 started_error_output
= 1;
3951 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
3953 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
3957 break; /* Here to retransmit */
3961 /* This is wrong. If doing a long backtrace, the user should be
3962 able to get out next time we call QUIT, without anything as
3963 violent as interrupt_query. If we want to provide a way out of
3964 here without getting to the next QUIT, it should be based on
3965 hitting ^C twice as in remote_wait. */
3975 static int remote_cisco_mode
;
3977 /* Come here after finding the start of the frame. Collect the rest
3978 into BUF, verifying the checksum, length, and handling run-length
3979 compression. No more than sizeof_buf-1 characters are read so that
3980 the buffer can be NUL terminated.
3982 Returns -1 on error, number of characters in buffer (ignoring the
3983 trailing NULL) on success. (could be extended to return one of the
3984 SERIAL status indications). */
3987 read_frame (char *buf
,
3999 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
4000 c
= readchar (remote_timeout
);
4003 case SERIAL_TIMEOUT
:
4005 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4009 fputs_filtered ("Saw new packet start in middle of old one\n",
4011 return -1; /* Start a new packet, count retries */
4014 unsigned char pktcsum
;
4020 check_0
= readchar (remote_timeout
);
4022 check_1
= readchar (remote_timeout
);
4024 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4027 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog
);
4030 else if (check_0
< 0 || check_1
< 0)
4033 fputs_filtered ("Communication error in checksum\n", gdb_stdlog
);
4037 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4038 if (csum
== pktcsum
)
4043 fprintf_filtered (gdb_stdlog
,
4044 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4046 fputs_filtered (buf
, gdb_stdlog
);
4047 fputs_filtered ("\n", gdb_stdlog
);
4049 /* Number of characters in buffer ignoring trailing
4053 case '*': /* Run length encoding */
4058 if (remote_cisco_mode
== 0)
4060 c
= readchar (remote_timeout
);
4062 repeat
= c
- ' ' + 3; /* Compute repeat count */
4066 /* Cisco's run-length encoding variant uses two
4067 hex chars to represent the repeat count. */
4069 c
= readchar (remote_timeout
);
4071 repeat
= fromhex (c
) << 4;
4072 c
= readchar (remote_timeout
);
4074 repeat
+= fromhex (c
);
4077 /* The character before ``*'' is repeated. */
4079 if (repeat
> 0 && repeat
<= 255
4081 && bc
+ repeat
< sizeof_buf
- 1)
4083 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4089 printf_filtered ("Repeat count %d too large for buffer: ", repeat
);
4090 puts_filtered (buf
);
4091 puts_filtered ("\n");
4095 if (bc
< sizeof_buf
- 1)
4103 puts_filtered ("Remote packet too long: ");
4104 puts_filtered (buf
);
4105 puts_filtered ("\n");
4112 /* Read a packet from the remote machine, with error checking, and
4113 store it in BUF. If FOREVER, wait forever rather than timing out;
4114 this is used (in synchronous mode) to wait for a target that is is
4115 executing user code to stop. */
4116 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4117 don't have to change all the calls to getpkt to deal with the
4118 return value, because at the moment I don't know what the right
4119 thing to do it for those. */
4127 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4131 /* Read a packet from the remote machine, with error checking, and
4132 store it in BUF. If FOREVER, wait forever rather than timing out;
4133 this is used (in synchronous mode) to wait for a target that is is
4134 executing user code to stop. If FOREVER == 0, this function is
4135 allowed to time out gracefully and return an indication of this to
4138 getpkt_sane (char *buf
,
4147 strcpy (buf
, "timeout");
4151 timeout
= watchdog
> 0 ? watchdog
: -1;
4155 timeout
= remote_timeout
;
4159 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4161 /* This can loop forever if the remote side sends us characters
4162 continuously, but if it pauses, we'll get a zero from readchar
4163 because of timeout. Then we'll count that as a retry. */
4165 /* Note that we will only wait forever prior to the start of a packet.
4166 After that, we expect characters to arrive at a brisk pace. They
4167 should show up within remote_timeout intervals. */
4171 c
= readchar (timeout
);
4173 if (c
== SERIAL_TIMEOUT
)
4175 if (forever
) /* Watchdog went off? Kill the target. */
4178 target_mourn_inferior ();
4179 error ("Watchdog has expired. Target detached.\n");
4182 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4188 /* We've found the start of a packet, now collect the data. */
4190 val
= read_frame (buf
, sizeof_buf
);
4196 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4197 fputstr_unfiltered (buf
, 0, gdb_stdlog
);
4198 fprintf_unfiltered (gdb_stdlog
, "\n");
4200 SERIAL_WRITE (remote_desc
, "+", 1);
4204 /* Try the whole thing again. */
4206 SERIAL_WRITE (remote_desc
, "-", 1);
4209 /* We have tried hard enough, and just can't receive the packet. Give up. */
4211 printf_unfiltered ("Ignoring packet error, continuing...\n");
4212 SERIAL_WRITE (remote_desc
, "+", 1);
4219 /* For some mysterious reason, wait_for_inferior calls kill instead of
4220 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4224 target_mourn_inferior ();
4228 /* Use catch_errors so the user can quit from gdb even when we aren't on
4229 speaking terms with the remote system. */
4230 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4232 /* Don't wait for it to die. I'm not really sure it matters whether
4233 we do or not. For the existing stubs, kill is a noop. */
4234 target_mourn_inferior ();
4237 /* Async version of remote_kill. */
4239 remote_async_kill (void)
4241 /* Unregister the file descriptor from the event loop. */
4242 if (target_is_async_p ())
4243 SERIAL_ASYNC (remote_desc
, NULL
, 0);
4245 /* For some mysterious reason, wait_for_inferior calls kill instead of
4246 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4250 target_mourn_inferior ();
4254 /* Use catch_errors so the user can quit from gdb even when we aren't on
4255 speaking terms with the remote system. */
4256 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4258 /* Don't wait for it to die. I'm not really sure it matters whether
4259 we do or not. For the existing stubs, kill is a noop. */
4260 target_mourn_inferior ();
4266 remote_mourn_1 (&remote_ops
);
4270 remote_async_mourn (void)
4272 remote_mourn_1 (&remote_async_ops
);
4276 extended_remote_mourn (void)
4278 /* We do _not_ want to mourn the target like this; this will
4279 remove the extended remote target from the target stack,
4280 and the next time the user says "run" it'll fail.
4282 FIXME: What is the right thing to do here? */
4284 remote_mourn_1 (&extended_remote_ops
);
4288 /* Worker function for remote_mourn. */
4290 remote_mourn_1 (struct target_ops
*target
)
4292 unpush_target (target
);
4293 generic_mourn_inferior ();
4296 /* In the extended protocol we want to be able to do things like
4297 "run" and have them basically work as expected. So we need
4298 a special create_inferior function.
4300 FIXME: One day add support for changing the exec file
4301 we're debugging, arguments and an environment. */
4304 extended_remote_create_inferior (char *exec_file
, char *args
, char **env
)
4306 /* Rip out the breakpoints; we'll reinsert them after restarting
4307 the remote server. */
4308 remove_breakpoints ();
4310 /* Now restart the remote server. */
4311 extended_remote_restart ();
4313 /* Now put the breakpoints back in. This way we're safe if the
4314 restart function works via a unix fork on the remote side. */
4315 insert_breakpoints ();
4317 /* Clean up from the last time we were running. */
4318 clear_proceed_status ();
4320 /* Let the remote process run. */
4321 proceed (-1, TARGET_SIGNAL_0
, 0);
4324 /* Async version of extended_remote_create_inferior. */
4326 extended_remote_async_create_inferior (char *exec_file
, char *args
, char **env
)
4328 /* Rip out the breakpoints; we'll reinsert them after restarting
4329 the remote server. */
4330 remove_breakpoints ();
4332 /* If running asynchronously, register the target file descriptor
4333 with the event loop. */
4334 if (event_loop_p
&& target_can_async_p ())
4335 target_async (inferior_event_handler
, 0);
4337 /* Now restart the remote server. */
4338 extended_remote_restart ();
4340 /* Now put the breakpoints back in. This way we're safe if the
4341 restart function works via a unix fork on the remote side. */
4342 insert_breakpoints ();
4344 /* Clean up from the last time we were running. */
4345 clear_proceed_status ();
4347 /* Let the remote process run. */
4348 proceed (-1, TARGET_SIGNAL_0
, 0);
4352 /* On some machines, e.g. 68k, we may use a different breakpoint instruction
4353 than other targets; in those use REMOTE_BREAKPOINT instead of just
4354 BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
4355 and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call
4356 the standard routines that are in mem-break.c. */
4358 /* FIXME, these ought to be done in a more dynamic fashion. For instance,
4359 the choice of breakpoint instruction affects target program design and
4360 vice versa, and by making it user-tweakable, the special code here
4361 goes away and we need fewer special GDB configurations. */
4363 #if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT)
4364 #define REMOTE_BREAKPOINT
4367 #ifdef REMOTE_BREAKPOINT
4369 /* If the target isn't bi-endian, just pretend it is. */
4370 #if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT)
4371 #define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4372 #define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
4375 static unsigned char big_break_insn
[] = BIG_REMOTE_BREAKPOINT
;
4376 static unsigned char little_break_insn
[] = LITTLE_REMOTE_BREAKPOINT
;
4378 #endif /* REMOTE_BREAKPOINT */
4380 /* Insert a breakpoint on targets that don't have any better breakpoint
4381 support. We read the contents of the target location and stash it,
4382 then overwrite it with a breakpoint instruction. ADDR is the target
4383 location in the target machine. CONTENTS_CACHE is a pointer to
4384 memory allocated for saving the target contents. It is guaranteed
4385 by the caller to be long enough to save sizeof BREAKPOINT bytes (this
4386 is accomplished via BREAKPOINT_MAX). */
4389 remote_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4391 #ifdef REMOTE_BREAKPOINT
4396 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4397 If it succeeds, then set the support to PACKET_ENABLE. If it
4398 fails, and the user has explicitly requested the Z support then
4399 report an error, otherwise, mark it disabled and go on. */
4401 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4403 char *buf
= alloca (PBUFSIZ
);
4406 addr
= remote_address_masked (addr
);
4410 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4411 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4412 sprintf (p
, ",%d", bp_size
);
4415 getpkt (buf
, PBUFSIZ
, 0);
4417 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]))
4423 case PACKET_UNKNOWN
:
4428 #ifdef REMOTE_BREAKPOINT
4429 val
= target_read_memory (addr
, contents_cache
, sizeof big_break_insn
);
4433 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
4434 val
= target_write_memory (addr
, (char *) big_break_insn
,
4435 sizeof big_break_insn
);
4437 val
= target_write_memory (addr
, (char *) little_break_insn
,
4438 sizeof little_break_insn
);
4443 return memory_insert_breakpoint (addr
, contents_cache
);
4444 #endif /* REMOTE_BREAKPOINT */
4448 remote_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4452 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4454 char *buf
= alloca (PBUFSIZ
);
4461 addr
= remote_address_masked (addr
);
4462 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4463 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4464 sprintf (p
, ",%d", bp_size
);
4467 getpkt (buf
, PBUFSIZ
, 0);
4469 return (buf
[0] == 'E');
4472 #ifdef REMOTE_BREAKPOINT
4473 return target_write_memory (addr
, contents_cache
, sizeof big_break_insn
);
4475 return memory_remove_breakpoint (addr
, contents_cache
);
4476 #endif /* REMOTE_BREAKPOINT */
4480 watchpoint_to_Z_packet (int type
)
4494 internal_error (__FILE__
, __LINE__
,
4495 "hw_bp_to_z: bad watchpoint type %d", type
);
4499 /* FIXME: This function should be static and a member of the remote
4503 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
4505 char *buf
= alloca (PBUFSIZ
);
4507 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4509 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4510 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4511 remote_protocol_Z
[packet
].name
,
4512 remote_protocol_Z
[packet
].title
);
4514 sprintf (buf
, "Z%x,", packet
);
4515 p
= strchr (buf
, '\0');
4516 addr
= remote_address_masked (addr
);
4517 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4518 sprintf (p
, ",%x", len
);
4521 getpkt (buf
, PBUFSIZ
, 0);
4523 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4526 case PACKET_UNKNOWN
:
4531 internal_error (__FILE__
, __LINE__
,
4532 "remote_insert_watchpoint: reached end of function");
4535 /* FIXME: This function should be static and a member of the remote
4539 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
4541 char *buf
= alloca (PBUFSIZ
);
4543 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4545 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4546 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4547 remote_protocol_Z
[packet
].name
,
4548 remote_protocol_Z
[packet
].title
);
4550 sprintf (buf
, "z%x,", packet
);
4551 p
= strchr (buf
, '\0');
4552 addr
= remote_address_masked (addr
);
4553 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4554 sprintf (p
, ",%x", len
);
4556 getpkt (buf
, PBUFSIZ
, 0);
4558 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4561 case PACKET_UNKNOWN
:
4566 internal_error (__FILE__
, __LINE__
,
4567 "remote_remove_watchpoint: reached end of function");
4570 /* FIXME: This function should be static and a member of the remote
4574 remote_insert_hw_breakpoint (CORE_ADDR addr
, int len
)
4576 char *buf
= alloca (PBUFSIZ
);
4579 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4580 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4581 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4582 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4588 addr
= remote_address_masked (addr
);
4589 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4590 sprintf (p
, ",%x", len
);
4593 getpkt (buf
, PBUFSIZ
, 0);
4595 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4598 case PACKET_UNKNOWN
:
4603 internal_error (__FILE__
, __LINE__
,
4604 "remote_remove_watchpoint: reached end of function");
4607 /* FIXME: This function should be static and a member of the remote
4611 remote_remove_hw_breakpoint (CORE_ADDR addr
, int len
)
4613 char *buf
= alloca (PBUFSIZ
);
4616 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4617 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4618 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4619 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4625 addr
= remote_address_masked (addr
);
4626 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4627 sprintf (p
, ",%x", len
);
4630 getpkt (buf
, PBUFSIZ
, 0);
4632 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4635 case PACKET_UNKNOWN
:
4640 internal_error (__FILE__
, __LINE__
,
4641 "remote_remove_watchpoint: reached end of function");
4644 /* Some targets are only capable of doing downloads, and afterwards
4645 they switch to the remote serial protocol. This function provides
4646 a clean way to get from the download target to the remote target.
4647 It's basically just a wrapper so that we don't have to expose any
4648 of the internal workings of remote.c.
4650 Prior to calling this routine, you should shutdown the current
4651 target code, else you will get the "A program is being debugged
4652 already..." message. Usually a call to pop_target() suffices. */
4655 push_remote_target (char *name
, int from_tty
)
4657 printf_filtered ("Switching to remote protocol\n");
4658 remote_open (name
, from_tty
);
4661 /* Other targets want to use the entire remote serial module but with
4662 certain remote_ops overridden. */
4665 open_remote_target (char *name
, int from_tty
, struct target_ops
*target
,
4668 printf_filtered ("Selecting the %sremote protocol\n",
4669 (extended_p
? "extended-" : ""));
4670 remote_open_1 (name
, from_tty
, target
, extended_p
);
4673 /* Table used by the crc32 function to calcuate the checksum. */
4675 static unsigned long crc32_table
[256] =
4678 static unsigned long
4679 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
4681 if (!crc32_table
[1])
4683 /* Initialize the CRC table and the decoding table. */
4687 for (i
= 0; i
< 256; i
++)
4689 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
4690 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
4697 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
4703 /* compare-sections command
4705 With no arguments, compares each loadable section in the exec bfd
4706 with the same memory range on the target, and reports mismatches.
4707 Useful for verifying the image on the target against the exec file.
4708 Depends on the target understanding the new "qCRC:" request. */
4710 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4711 target method (target verify memory) and generic version of the
4712 actual command. This will allow other high-level code (especially
4713 generic_load()) to make use of this target functionality. */
4716 compare_sections_command (char *args
, int from_tty
)
4719 unsigned long host_crc
, target_crc
;
4720 extern bfd
*exec_bfd
;
4721 struct cleanup
*old_chain
;
4724 const char *sectname
;
4725 char *buf
= alloca (PBUFSIZ
);
4732 error ("command cannot be used without an exec file");
4733 if (!current_target
.to_shortname
||
4734 strcmp (current_target
.to_shortname
, "remote") != 0)
4735 error ("command can only be used with remote target");
4737 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
4739 if (!(s
->flags
& SEC_LOAD
))
4740 continue; /* skip non-loadable section */
4742 size
= bfd_get_section_size_before_reloc (s
);
4744 continue; /* skip zero-length section */
4746 sectname
= bfd_get_section_name (exec_bfd
, s
);
4747 if (args
&& strcmp (args
, sectname
) != 0)
4748 continue; /* not the section selected by user */
4750 matched
= 1; /* do this section */
4752 /* FIXME: assumes lma can fit into long */
4753 sprintf (buf
, "qCRC:%lx,%lx", (long) lma
, (long) size
);
4756 /* be clever; compute the host_crc before waiting for target reply */
4757 sectdata
= xmalloc (size
);
4758 old_chain
= make_cleanup (xfree
, sectdata
);
4759 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
4760 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
4762 getpkt (buf
, PBUFSIZ
, 0);
4764 error ("target memory fault, section %s, range 0x%08x -- 0x%08x",
4765 sectname
, lma
, lma
+ size
);
4767 error ("remote target does not support this operation");
4769 for (target_crc
= 0, tmp
= &buf
[1]; *tmp
; tmp
++)
4770 target_crc
= target_crc
* 16 + fromhex (*tmp
);
4772 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4773 sectname
, paddr (lma
), paddr (lma
+ size
));
4774 if (host_crc
== target_crc
)
4775 printf_filtered ("matched.\n");
4778 printf_filtered ("MIS-MATCHED!\n");
4782 do_cleanups (old_chain
);
4785 warning ("One or more sections of the remote executable does not match\n\
4786 the loaded file\n");
4787 if (args
&& !matched
)
4788 printf_filtered ("No loaded section named '%s'.\n", args
);
4792 remote_query (int query_type
, char *buf
, char *outbuf
, int *bufsiz
)
4795 char *buf2
= alloca (PBUFSIZ
);
4796 char *p2
= &buf2
[0];
4799 error ("null pointer to remote bufer size specified");
4801 /* minimum outbuf size is PBUFSIZ - if bufsiz is not large enough let
4802 the caller know and return what the minimum size is */
4803 /* Note: a zero bufsiz can be used to query the minimum buffer size */
4804 if (*bufsiz
< PBUFSIZ
)
4810 /* except for querying the minimum buffer size, target must be open */
4812 error ("remote query is only available after target open");
4814 /* we only take uppercase letters as query types, at least for now */
4815 if ((query_type
< 'A') || (query_type
> 'Z'))
4816 error ("invalid remote query type");
4819 error ("null remote query specified");
4822 error ("remote query requires a buffer to receive data");
4829 /* we used one buffer char for the remote protocol q command and another
4830 for the query type. As the remote protocol encapsulation uses 4 chars
4831 plus one extra in case we are debugging (remote_debug),
4832 we have PBUFZIZ - 7 left to pack the query string */
4834 while (buf
[i
] && (i
< (PBUFSIZ
- 8)))
4836 /* bad caller may have sent forbidden characters */
4837 if ((!isprint (buf
[i
])) || (buf
[i
] == '$') || (buf
[i
] == '#'))
4838 error ("illegal characters in query string");
4846 error ("query larger than available buffer");
4852 getpkt (outbuf
, *bufsiz
, 0);
4858 remote_rcmd (char *command
,
4859 struct ui_file
*outbuf
)
4862 char *buf
= alloca (PBUFSIZ
);
4866 error ("remote rcmd is only available after target open");
4868 /* Send a NULL command across as an empty command */
4869 if (command
== NULL
)
4872 /* The query prefix */
4873 strcpy (buf
, "qRcmd,");
4874 p
= strchr (buf
, '\0');
4876 if ((strlen (buf
) + strlen (command
) * 2 + 8/*misc*/) > PBUFSIZ
)
4877 error ("\"monitor\" command ``%s'' is too long\n", command
);
4879 /* Encode the actual command */
4880 for (i
= 0; command
[i
]; i
++)
4882 *p
++ = tohex ((command
[i
] >> 4) & 0xf);
4883 *p
++ = tohex (command
[i
] & 0xf);
4887 if (putpkt (buf
) < 0)
4888 error ("Communication problem with target\n");
4890 /* get/display the response */
4893 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
4895 getpkt (buf
, PBUFSIZ
, 0);
4897 error ("Target does not support this command\n");
4898 if (buf
[0] == 'O' && buf
[1] != 'K')
4900 remote_console_output (buf
+ 1); /* 'O' message from stub */
4903 if (strcmp (buf
, "OK") == 0)
4905 if (strlen (buf
) == 3 && buf
[0] == 'E'
4906 && isdigit (buf
[1]) && isdigit (buf
[2]))
4908 error ("Protocol error with Rcmd");
4910 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
4912 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
4913 fputc_unfiltered (c
, outbuf
);
4920 packet_command (char *args
, int from_tty
)
4922 char *buf
= alloca (PBUFSIZ
);
4925 error ("command can only be used with remote target");
4928 error ("remote-packet command requires packet text as argument");
4930 puts_filtered ("sending: ");
4931 print_packet (args
);
4932 puts_filtered ("\n");
4935 getpkt (buf
, PBUFSIZ
, 0);
4936 puts_filtered ("received: ");
4938 puts_filtered ("\n");
4942 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
4944 static void display_thread_info (struct gdb_ext_thread_info
*info
);
4946 static void threadset_test_cmd (char *cmd
, int tty
);
4948 static void threadalive_test (char *cmd
, int tty
);
4950 static void threadlist_test_cmd (char *cmd
, int tty
);
4952 int get_and_display_threadinfo (threadref
* ref
);
4954 static void threadinfo_test_cmd (char *cmd
, int tty
);
4956 static int thread_display_step (threadref
* ref
, void *context
);
4958 static void threadlist_update_test_cmd (char *cmd
, int tty
);
4960 static void init_remote_threadtests (void);
4962 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
4965 threadset_test_cmd (char *cmd
, int tty
)
4967 int sample_thread
= SAMPLE_THREAD
;
4969 printf_filtered ("Remote threadset test\n");
4970 set_thread (sample_thread
, 1);
4975 threadalive_test (char *cmd
, int tty
)
4977 int sample_thread
= SAMPLE_THREAD
;
4979 if (remote_thread_alive (sample_thread
))
4980 printf_filtered ("PASS: Thread alive test\n");
4982 printf_filtered ("FAIL: Thread alive test\n");
4985 void output_threadid (char *title
, threadref
* ref
);
4988 output_threadid (char *title
, threadref
*ref
)
4992 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex */
4994 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
4998 threadlist_test_cmd (char *cmd
, int tty
)
5001 threadref nextthread
;
5002 int done
, result_count
;
5003 threadref threadlist
[3];
5005 printf_filtered ("Remote Threadlist test\n");
5006 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5007 &result_count
, &threadlist
[0]))
5008 printf_filtered ("FAIL: threadlist test\n");
5011 threadref
*scan
= threadlist
;
5012 threadref
*limit
= scan
+ result_count
;
5014 while (scan
< limit
)
5015 output_threadid (" thread ", scan
++);
5020 display_thread_info (struct gdb_ext_thread_info
*info
)
5022 output_threadid ("Threadid: ", &info
->threadid
);
5023 printf_filtered ("Name: %s\n ", info
->shortname
);
5024 printf_filtered ("State: %s\n", info
->display
);
5025 printf_filtered ("other: %s\n\n", info
->more_display
);
5029 get_and_display_threadinfo (threadref
*ref
)
5033 struct gdb_ext_thread_info threadinfo
;
5035 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5036 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5037 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5038 display_thread_info (&threadinfo
);
5043 threadinfo_test_cmd (char *cmd
, int tty
)
5045 int athread
= SAMPLE_THREAD
;
5049 int_to_threadref (&thread
, athread
);
5050 printf_filtered ("Remote Threadinfo test\n");
5051 if (!get_and_display_threadinfo (&thread
))
5052 printf_filtered ("FAIL cannot get thread info\n");
5056 thread_display_step (threadref
*ref
, void *context
)
5058 /* output_threadid(" threadstep ",ref); *//* simple test */
5059 return get_and_display_threadinfo (ref
);
5063 threadlist_update_test_cmd (char *cmd
, int tty
)
5065 printf_filtered ("Remote Threadlist update test\n");
5066 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5070 init_remote_threadtests (void)
5072 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
5073 "Fetch and print the remote list of thread identifiers, one pkt only");
5074 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5075 "Fetch and display info about one thread");
5076 add_com ("tset", class_obscure
, threadset_test_cmd
,
5077 "Test setting to a different thread");
5078 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5079 "Iterate through updating all remote thread info");
5080 add_com ("talive", class_obscure
, threadalive_test
,
5081 " Remote thread alive test ");
5087 init_remote_ops (void)
5089 remote_ops
.to_shortname
= "remote";
5090 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
5092 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5093 Specify the serial device it is connected to\n\
5094 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5095 remote_ops
.to_open
= remote_open
;
5096 remote_ops
.to_close
= remote_close
;
5097 remote_ops
.to_detach
= remote_detach
;
5098 remote_ops
.to_resume
= remote_resume
;
5099 remote_ops
.to_wait
= remote_wait
;
5100 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
5101 remote_ops
.to_store_registers
= remote_store_registers
;
5102 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5103 remote_ops
.to_xfer_memory
= remote_xfer_memory
;
5104 remote_ops
.to_files_info
= remote_files_info
;
5105 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5106 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5107 remote_ops
.to_kill
= remote_kill
;
5108 remote_ops
.to_load
= generic_load
;
5109 remote_ops
.to_mourn_inferior
= remote_mourn
;
5110 remote_ops
.to_thread_alive
= remote_thread_alive
;
5111 remote_ops
.to_find_new_threads
= remote_threads_info
;
5112 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5113 remote_ops
.to_stop
= remote_stop
;
5114 remote_ops
.to_query
= remote_query
;
5115 remote_ops
.to_rcmd
= remote_rcmd
;
5116 remote_ops
.to_stratum
= process_stratum
;
5117 remote_ops
.to_has_all_memory
= 1;
5118 remote_ops
.to_has_memory
= 1;
5119 remote_ops
.to_has_stack
= 1;
5120 remote_ops
.to_has_registers
= 1;
5121 remote_ops
.to_has_execution
= 1;
5122 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5123 remote_ops
.to_magic
= OPS_MAGIC
;
5126 /* Set up the extended remote vector by making a copy of the standard
5127 remote vector and adding to it. */
5130 init_extended_remote_ops (void)
5132 extended_remote_ops
= remote_ops
;
5134 extended_remote_ops
.to_shortname
= "extended-remote";
5135 extended_remote_ops
.to_longname
=
5136 "Extended remote serial target in gdb-specific protocol";
5137 extended_remote_ops
.to_doc
=
5138 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5139 Specify the serial device it is connected to (e.g. /dev/ttya).",
5140 extended_remote_ops
.to_open
= extended_remote_open
;
5141 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
5142 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5146 * Command: info remote-process
5148 * This implements Cisco's version of the "info proc" command.
5150 * This query allows the target stub to return an arbitrary string
5151 * (or strings) giving arbitrary information about the target process.
5152 * This is optional; the target stub isn't required to implement it.
5154 * Syntax: qfProcessInfo request first string
5155 * qsProcessInfo request subsequent string
5156 * reply: 'O'<hex-encoded-string>
5157 * 'l' last reply (empty)
5161 remote_info_process (char *args
, int from_tty
)
5163 char *buf
= alloca (PBUFSIZ
);
5165 if (remote_desc
== 0)
5166 error ("Command can only be used when connected to the remote target.");
5168 putpkt ("qfProcessInfo");
5169 getpkt (buf
, PBUFSIZ
, 0);
5171 return; /* Silently: target does not support this feature. */
5174 error ("info proc: target error.");
5176 while (buf
[0] == 'O') /* Capitol-O packet */
5178 remote_console_output (&buf
[1]);
5179 putpkt ("qsProcessInfo");
5180 getpkt (buf
, PBUFSIZ
, 0);
5189 remote_cisco_open (char *name
, int from_tty
)
5193 "To open a remote debug connection, you need to specify what \n\
5194 device is attached to the remote system (e.g. host:port).");
5196 /* See FIXME above */
5197 wait_forever_enabled_p
= 1;
5199 target_preopen (from_tty
);
5201 unpush_target (&remote_cisco_ops
);
5203 remote_desc
= SERIAL_OPEN (name
);
5205 perror_with_name (name
);
5208 * If a baud rate was specified on the gdb command line it will
5209 * be greater than the initial value of -1. If it is, use it otherwise
5213 baud_rate
= (baud_rate
> 0) ? baud_rate
: 9600;
5214 if (SERIAL_SETBAUDRATE (remote_desc
, baud_rate
))
5216 SERIAL_CLOSE (remote_desc
);
5217 perror_with_name (name
);
5220 SERIAL_RAW (remote_desc
);
5222 /* If there is something sitting in the buffer we might take it as a
5223 response to a command, which would be bad. */
5224 SERIAL_FLUSH_INPUT (remote_desc
);
5228 puts_filtered ("Remote debugging using ");
5229 puts_filtered (name
);
5230 puts_filtered ("\n");
5233 remote_cisco_mode
= 1;
5235 push_target (&remote_cisco_ops
); /* Switch to using cisco target now */
5237 init_all_packet_configs ();
5239 general_thread
= -2;
5240 continue_thread
= -2;
5242 /* Probe for ability to use "ThreadInfo" query, as required. */
5243 use_threadinfo_query
= 1;
5244 use_threadextra_query
= 1;
5246 /* Without this, some commands which require an active target (such
5247 as kill) won't work. This variable serves (at least) double duty
5248 as both the pid of the target process (if it has such), and as a
5249 flag indicating that a target is active. These functions should
5250 be split out into seperate variables, especially since GDB will
5251 someday have a notion of debugging several processes. */
5252 inferior_pid
= MAGIC_NULL_PID
;
5254 /* Start the remote connection; if error (0), discard this target. */
5256 if (!catch_errors (remote_start_remote_dummy
, (char *) 0,
5257 "Couldn't establish connection to remote target\n",
5266 remote_cisco_close (int quitting
)
5268 remote_cisco_mode
= 0;
5269 remote_close (quitting
);
5273 remote_cisco_mourn (void)
5275 remote_mourn_1 (&remote_cisco_ops
);
5287 /* shared between readsocket() and readtty() */
5288 static char *tty_input
;
5290 static int escape_count
;
5291 static int echo_check
;
5292 extern int quit_flag
;
5299 /* Loop until the socket doesn't have any more data */
5301 while ((data
= readchar (0)) >= 0)
5303 /* Check for the escape sequence */
5306 /* If this is the fourth escape, get out */
5307 if (++escape_count
== 4)
5312 { /* This is a '|', but not the fourth in a row.
5313 Continue without echoing it. If it isn't actually
5314 one of four in a row, it'll be echoed later. */
5321 /* Ensure any pending '|'s are flushed. */
5323 for (; escape_count
> 0; escape_count
--)
5327 if (data
== '\r') /* If this is a return character, */
5328 continue; /* - just supress it. */
5330 if (echo_check
!= -1) /* Check for echo of user input. */
5332 if (tty_input
[echo_check
] == data
)
5334 echo_check
++; /* Character matched user input: */
5335 continue; /* Continue without echoing it. */
5337 else if ((data
== '\n') && (tty_input
[echo_check
] == '\r'))
5338 { /* End of the line (and of echo checking). */
5339 echo_check
= -1; /* No more echo supression */
5340 continue; /* Continue without echoing. */
5343 { /* Failed check for echo of user input.
5344 We now have some suppressed output to flush! */
5347 for (j
= 0; j
< echo_check
; j
++)
5348 putchar (tty_input
[j
]);
5352 putchar (data
); /* Default case: output the char. */
5355 if (data
== SERIAL_TIMEOUT
) /* Timeout returned from readchar. */
5356 return READ_MORE
; /* Try to read some more */
5358 return FATAL_ERROR
; /* Trouble, bail out */
5366 /* First, read a buffer full from the terminal */
5367 tty_bytecount
= read (fileno (stdin
), tty_input
, sizeof (tty_input
) - 1);
5368 if (tty_bytecount
== -1)
5370 perror ("readtty: read failed");
5374 /* Remove a quoted newline. */
5375 if (tty_input
[tty_bytecount
- 1] == '\n' &&
5376 tty_input
[tty_bytecount
- 2] == '\\') /* line ending in backslash */
5378 tty_input
[--tty_bytecount
] = 0; /* remove newline */
5379 tty_input
[--tty_bytecount
] = 0; /* remove backslash */
5382 /* Turn trailing newlines into returns */
5383 if (tty_input
[tty_bytecount
- 1] == '\n')
5384 tty_input
[tty_bytecount
- 1] = '\r';
5386 /* If the line consists of a ~, enter debugging mode. */
5387 if ((tty_input
[0] == '~') && (tty_bytecount
== 2))
5390 /* Make this a zero terminated string and write it out */
5391 tty_input
[tty_bytecount
] = 0;
5392 if (SERIAL_WRITE (remote_desc
, tty_input
, tty_bytecount
))
5394 perror_with_name ("readtty: write failed");
5404 fd_set input
; /* file descriptors for select */
5405 int tablesize
; /* max number of FDs for select */
5409 extern int escape_count
; /* global shared by readsocket */
5410 extern int echo_check
; /* ditto */
5415 tablesize
= 8 * sizeof (input
);
5419 /* Check for anything from our socket - doesn't block. Note that
5420 this must be done *before* the select as there may be
5421 buffered I/O waiting to be processed. */
5423 if ((status
= readsocket ()) == FATAL_ERROR
)
5425 error ("Debugging terminated by communications error");
5427 else if (status
!= READ_MORE
)
5432 fflush (stdout
); /* Flush output before blocking */
5434 /* Now block on more socket input or TTY input */
5437 FD_SET (fileno (stdin
), &input
);
5438 FD_SET (DEPRECATED_SERIAL_FD (remote_desc
), &input
);
5440 status
= select (tablesize
, &input
, 0, 0, 0);
5441 if ((status
== -1) && (errno
!= EINTR
))
5443 error ("Communications error on select %d", errno
);
5446 /* Handle Control-C typed */
5450 if ((++quit_count
) == 2)
5452 if (query ("Interrupt GDB? "))
5454 printf_filtered ("Interrupted by user.\n");
5455 return_to_top_level (RETURN_QUIT
);
5462 SERIAL_SEND_BREAK (remote_desc
);
5464 SERIAL_WRITE (remote_desc
, "\003", 1);
5469 /* Handle console input */
5471 if (FD_ISSET (fileno (stdin
), &input
))
5475 status
= readtty ();
5476 if (status
== READ_MORE
)
5479 return status
; /* telnet session ended */
5485 remote_cisco_wait (int pid
, struct target_waitstatus
*status
)
5487 if (minitelnet () != ENTER_DEBUG
)
5489 error ("Debugging session terminated by protocol error");
5492 return remote_wait (pid
, status
);
5496 init_remote_cisco_ops (void)
5498 remote_cisco_ops
.to_shortname
= "cisco";
5499 remote_cisco_ops
.to_longname
= "Remote serial target in cisco-specific protocol";
5500 remote_cisco_ops
.to_doc
=
5501 "Use a remote machine via TCP, using a cisco-specific protocol.\n\
5502 Specify the serial device it is connected to (e.g. host:2020).";
5503 remote_cisco_ops
.to_open
= remote_cisco_open
;
5504 remote_cisco_ops
.to_close
= remote_cisco_close
;
5505 remote_cisco_ops
.to_detach
= remote_detach
;
5506 remote_cisco_ops
.to_resume
= remote_resume
;
5507 remote_cisco_ops
.to_wait
= remote_cisco_wait
;
5508 remote_cisco_ops
.to_fetch_registers
= remote_fetch_registers
;
5509 remote_cisco_ops
.to_store_registers
= remote_store_registers
;
5510 remote_cisco_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5511 remote_cisco_ops
.to_xfer_memory
= remote_xfer_memory
;
5512 remote_cisco_ops
.to_files_info
= remote_files_info
;
5513 remote_cisco_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5514 remote_cisco_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5515 remote_cisco_ops
.to_kill
= remote_kill
;
5516 remote_cisco_ops
.to_load
= generic_load
;
5517 remote_cisco_ops
.to_mourn_inferior
= remote_cisco_mourn
;
5518 remote_cisco_ops
.to_thread_alive
= remote_thread_alive
;
5519 remote_cisco_ops
.to_find_new_threads
= remote_threads_info
;
5520 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5521 remote_cisco_ops
.to_stratum
= process_stratum
;
5522 remote_cisco_ops
.to_has_all_memory
= 1;
5523 remote_cisco_ops
.to_has_memory
= 1;
5524 remote_cisco_ops
.to_has_stack
= 1;
5525 remote_cisco_ops
.to_has_registers
= 1;
5526 remote_cisco_ops
.to_has_execution
= 1;
5527 remote_cisco_ops
.to_magic
= OPS_MAGIC
;
5531 remote_can_async_p (void)
5533 /* We're async whenever the serial device is. */
5534 return (current_target
.to_async_mask_value
) && SERIAL_CAN_ASYNC_P (remote_desc
);
5538 remote_is_async_p (void)
5540 /* We're async whenever the serial device is. */
5541 return (current_target
.to_async_mask_value
) && SERIAL_IS_ASYNC_P (remote_desc
);
5544 /* Pass the SERIAL event on and up to the client. One day this code
5545 will be able to delay notifying the client of an event until the
5546 point where an entire packet has been received. */
5548 static void (*async_client_callback
) (enum inferior_event_type event_type
, void *context
);
5549 static void *async_client_context
;
5550 static serial_event_ftype remote_async_serial_handler
;
5553 remote_async_serial_handler (serial_t scb
, void *context
)
5555 /* Don't propogate error information up to the client. Instead let
5556 the client find out about the error by querying the target. */
5557 async_client_callback (INF_REG_EVENT
, async_client_context
);
5561 remote_async (void (*callback
) (enum inferior_event_type event_type
, void *context
), void *context
)
5563 if (current_target
.to_async_mask_value
== 0)
5564 internal_error (__FILE__
, __LINE__
,
5565 "Calling remote_async when async is masked");
5567 if (callback
!= NULL
)
5569 SERIAL_ASYNC (remote_desc
, remote_async_serial_handler
, NULL
);
5570 async_client_callback
= callback
;
5571 async_client_context
= context
;
5574 SERIAL_ASYNC (remote_desc
, NULL
, NULL
);
5577 /* Target async and target extended-async.
5579 This are temporary targets, until it is all tested. Eventually
5580 async support will be incorporated int the usual 'remote'
5584 init_remote_async_ops (void)
5586 remote_async_ops
.to_shortname
= "async";
5587 remote_async_ops
.to_longname
= "Remote serial target in async version of the gdb-specific protocol";
5588 remote_async_ops
.to_doc
=
5589 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5590 Specify the serial device it is connected to (e.g. /dev/ttya).";
5591 remote_async_ops
.to_open
= remote_async_open
;
5592 remote_async_ops
.to_close
= remote_close
;
5593 remote_async_ops
.to_detach
= remote_async_detach
;
5594 remote_async_ops
.to_resume
= remote_async_resume
;
5595 remote_async_ops
.to_wait
= remote_async_wait
;
5596 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
5597 remote_async_ops
.to_store_registers
= remote_store_registers
;
5598 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5599 remote_async_ops
.to_xfer_memory
= remote_xfer_memory
;
5600 remote_async_ops
.to_files_info
= remote_files_info
;
5601 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5602 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5603 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
5604 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
5605 remote_async_ops
.to_kill
= remote_async_kill
;
5606 remote_async_ops
.to_load
= generic_load
;
5607 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
5608 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
5609 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
5610 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5611 remote_async_ops
.to_stop
= remote_stop
;
5612 remote_async_ops
.to_query
= remote_query
;
5613 remote_async_ops
.to_rcmd
= remote_rcmd
;
5614 remote_async_ops
.to_stratum
= process_stratum
;
5615 remote_async_ops
.to_has_all_memory
= 1;
5616 remote_async_ops
.to_has_memory
= 1;
5617 remote_async_ops
.to_has_stack
= 1;
5618 remote_async_ops
.to_has_registers
= 1;
5619 remote_async_ops
.to_has_execution
= 1;
5620 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5621 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
5622 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
5623 remote_async_ops
.to_async
= remote_async
;
5624 remote_async_ops
.to_async_mask_value
= 1;
5625 remote_async_ops
.to_magic
= OPS_MAGIC
;
5628 /* Set up the async extended remote vector by making a copy of the standard
5629 remote vector and adding to it. */
5632 init_extended_async_remote_ops (void)
5634 extended_async_remote_ops
= remote_async_ops
;
5636 extended_async_remote_ops
.to_shortname
= "extended-async";
5637 extended_async_remote_ops
.to_longname
=
5638 "Extended remote serial target in async gdb-specific protocol";
5639 extended_async_remote_ops
.to_doc
=
5640 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5641 Specify the serial device it is connected to (e.g. /dev/ttya).",
5642 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
5643 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
5644 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5648 set_remote_cmd (char *args
, int from_tty
)
5654 show_remote_cmd (char *args
, int from_tty
)
5657 show_remote_protocol_Z_packet_cmd (args
, from_tty
);
5658 show_remote_protocol_e_packet_cmd (args
, from_tty
);
5659 show_remote_protocol_E_packet_cmd (args
, from_tty
);
5660 show_remote_protocol_P_packet_cmd (args
, from_tty
);
5661 show_remote_protocol_binary_download_cmd (args
, from_tty
);
5665 build_remote_gdbarch_data (void)
5667 build_remote_packet_sizes ();
5670 tty_input
= xmalloc (PBUFSIZ
);
5671 remote_address_size
= TARGET_ADDR_BIT
;
5675 _initialize_remote (void)
5677 static struct cmd_list_element
*remote_set_cmdlist
;
5678 static struct cmd_list_element
*remote_show_cmdlist
;
5679 struct cmd_list_element
*tmpcmd
;
5681 /* architecture specific data */
5682 build_remote_gdbarch_data ();
5683 register_gdbarch_swap (&tty_input
, sizeof (&tty_input
), NULL
);
5684 register_remote_packet_sizes ();
5685 register_gdbarch_swap (&remote_address_size
,
5686 sizeof (&remote_address_size
), NULL
);
5687 register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
5690 add_target (&remote_ops
);
5692 init_extended_remote_ops ();
5693 add_target (&extended_remote_ops
);
5695 init_remote_async_ops ();
5696 add_target (&remote_async_ops
);
5698 init_extended_async_remote_ops ();
5699 add_target (&extended_async_remote_ops
);
5701 init_remote_cisco_ops ();
5702 add_target (&remote_cisco_ops
);
5705 init_remote_threadtests ();
5708 /* set/show remote ... */
5710 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, "\
5711 Remote protocol specific variables\n\
5712 Configure various remote-protocol specific variables such as\n\
5713 the packets being used",
5714 &remote_set_cmdlist
, "set remote ",
5715 0/*allow-unknown*/, &setlist
);
5716 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, "\
5717 Remote protocol specific variables\n\
5718 Configure various remote-protocol specific variables such as\n\
5719 the packets being used",
5720 &remote_show_cmdlist
, "show remote ",
5721 0/*allow-unknown*/, &showlist
);
5723 add_cmd ("compare-sections", class_obscure
, compare_sections_command
,
5724 "Compare section data on target to the exec file.\n\
5725 Argument is a single section name (default: all loaded sections).",
5728 add_cmd ("packet", class_maintenance
, packet_command
,
5729 "Send an arbitrary packet to a remote target.\n\
5730 maintenance packet TEXT\n\
5731 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5732 this command sends the string TEXT to the inferior, and displays the\n\
5733 response packet. GDB supplies the initial `$' character, and the\n\
5734 terminating `#' character and checksum.",
5738 (add_set_cmd ("remotebreak", no_class
,
5739 var_boolean
, (char *) &remote_break
,
5740 "Set whether to send break if interrupted.\n",
5744 /* Install commands for configuring memory read/write packets. */
5746 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
,
5747 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5749 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
,
5750 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5752 add_cmd ("memory-write-packet-size", no_class
,
5753 set_memory_write_packet_size
,
5754 "Set the maximum number of bytes per memory-write packet.\n"
5755 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5756 "default packet size. The actual limit is further reduced\n"
5757 "dependent on the target. Specify ``fixed'' to disable the\n"
5758 "further restriction and ``limit'' to enable that restriction\n",
5759 &remote_set_cmdlist
);
5760 add_cmd ("memory-read-packet-size", no_class
,
5761 set_memory_read_packet_size
,
5762 "Set the maximum number of bytes per memory-read packet.\n"
5763 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5764 "default packet size. The actual limit is further reduced\n"
5765 "dependent on the target. Specify ``fixed'' to disable the\n"
5766 "further restriction and ``limit'' to enable that restriction\n",
5767 &remote_set_cmdlist
);
5768 add_cmd ("memory-write-packet-size", no_class
,
5769 show_memory_write_packet_size
,
5770 "Show the maximum number of bytes per memory-write packet.\n",
5771 &remote_show_cmdlist
);
5772 add_cmd ("memory-read-packet-size", no_class
,
5773 show_memory_read_packet_size
,
5774 "Show the maximum number of bytes per memory-read packet.\n",
5775 &remote_show_cmdlist
);
5778 (add_set_cmd ("remoteaddresssize", class_obscure
,
5779 var_integer
, (char *) &remote_address_size
,
5780 "Set the maximum size of the address (in bits) \
5781 in a memory packet.\n",
5785 add_packet_config_cmd (&remote_protocol_binary_download
,
5786 "X", "binary-download",
5787 set_remote_protocol_binary_download_cmd
,
5788 show_remote_protocol_binary_download_cmd
,
5789 &remote_set_cmdlist
, &remote_show_cmdlist
,
5792 /* XXXX - should ``set remotebinarydownload'' be retained for
5795 (add_set_cmd ("remotebinarydownload", no_class
,
5796 var_boolean
, (char *) &remote_binary_download
,
5797 "Set binary downloads.\n", &setlist
),
5801 add_info ("remote-process", remote_info_process
,
5802 "Query the remote system for process info.");
5804 add_packet_config_cmd (&remote_protocol_e
,
5805 "e", "step-over-range",
5806 set_remote_protocol_e_packet_cmd
,
5807 show_remote_protocol_e_packet_cmd
,
5808 &remote_set_cmdlist
, &remote_show_cmdlist
,
5811 add_packet_config_cmd (&remote_protocol_E
,
5812 "E", "step-over-range-w-signal",
5813 set_remote_protocol_E_packet_cmd
,
5814 show_remote_protocol_E_packet_cmd
,
5815 &remote_set_cmdlist
, &remote_show_cmdlist
,
5818 add_packet_config_cmd (&remote_protocol_P
,
5819 "P", "set-register",
5820 set_remote_protocol_P_packet_cmd
,
5821 show_remote_protocol_P_packet_cmd
,
5822 &remote_set_cmdlist
, &remote_show_cmdlist
,
5825 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
],
5826 "Z0", "software-breakpoint",
5827 set_remote_protocol_Z_software_bp_packet_cmd
,
5828 show_remote_protocol_Z_software_bp_packet_cmd
,
5829 &remote_set_cmdlist
, &remote_show_cmdlist
,
5832 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
],
5833 "Z1", "hardware-breakpoint",
5834 set_remote_protocol_Z_hardware_bp_packet_cmd
,
5835 show_remote_protocol_Z_hardware_bp_packet_cmd
,
5836 &remote_set_cmdlist
, &remote_show_cmdlist
,
5839 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
],
5840 "Z2", "write-watchpoint",
5841 set_remote_protocol_Z_write_wp_packet_cmd
,
5842 show_remote_protocol_Z_write_wp_packet_cmd
,
5843 &remote_set_cmdlist
, &remote_show_cmdlist
,
5846 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
],
5847 "Z3", "read-watchpoint",
5848 set_remote_protocol_Z_read_wp_packet_cmd
,
5849 show_remote_protocol_Z_read_wp_packet_cmd
,
5850 &remote_set_cmdlist
, &remote_show_cmdlist
,
5853 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
],
5854 "Z4", "access-watchpoint",
5855 set_remote_protocol_Z_access_wp_packet_cmd
,
5856 show_remote_protocol_Z_access_wp_packet_cmd
,
5857 &remote_set_cmdlist
, &remote_show_cmdlist
,
5860 /* Keep the old ``set remote Z-packet ...'' working. */
5861 tmpcmd
= add_set_auto_boolean_cmd ("Z-packet", class_obscure
,
5862 &remote_Z_packet_detect
,
5864 Set use of remote protocol `Z' packets", &remote_set_cmdlist
);
5865 tmpcmd
->function
.sfunc
= set_remote_protocol_Z_packet_cmd
;
5866 add_cmd ("Z-packet", class_obscure
, show_remote_protocol_Z_packet_cmd
,
5867 "Show use of remote protocol `Z' packets ",
5868 &remote_show_cmdlist
);