1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* See the GDB User Guide for details of the GDB remote protocol. */
27 #include "gdb_string.h"
34 /*#include "terminal.h" */
37 #include "gdb-stabs.h"
38 #include "gdbthread.h"
42 #include "gdb_assert.h"
47 #include "event-loop.h"
48 #include "event-top.h"
54 #include "gdbcore.h" /* for exec_bfd */
56 #include "remote-fileio.h"
58 /* Prototypes for local functions */
59 static void cleanup_sigint_signal_handler (void *dummy
);
60 static void initialize_sigint_signal_handler (void);
61 static int getpkt_sane (char *buf
, long sizeof_buf
, int forever
);
63 static void handle_remote_sigint (int);
64 static void handle_remote_sigint_twice (int);
65 static void async_remote_interrupt (gdb_client_data
);
66 void async_remote_interrupt_twice (gdb_client_data
);
68 static void build_remote_gdbarch_data (void);
70 static void remote_files_info (struct target_ops
*ignore
);
72 static int remote_xfer_memory (CORE_ADDR memaddr
, char *myaddr
,
73 int len
, int should_write
,
74 struct mem_attrib
*attrib
,
75 struct target_ops
*target
);
77 static void remote_prepare_to_store (void);
79 static void remote_fetch_registers (int regno
);
81 static void remote_resume (ptid_t ptid
, int step
,
82 enum target_signal siggnal
);
83 static void remote_async_resume (ptid_t ptid
, int step
,
84 enum target_signal siggnal
);
85 static int remote_start_remote (struct ui_out
*uiout
, void *dummy
);
87 static void remote_open (char *name
, int from_tty
);
88 static void remote_async_open (char *name
, int from_tty
);
90 static void extended_remote_open (char *name
, int from_tty
);
91 static void extended_remote_async_open (char *name
, int from_tty
);
93 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
,
96 static void remote_close (int quitting
);
98 static void remote_store_registers (int regno
);
100 static void remote_mourn (void);
101 static void remote_async_mourn (void);
103 static void extended_remote_restart (void);
105 static void extended_remote_mourn (void);
107 static void remote_mourn_1 (struct target_ops
*);
109 static void remote_send (char *buf
, long sizeof_buf
);
111 static int readchar (int timeout
);
113 static ptid_t
remote_wait (ptid_t ptid
,
114 struct target_waitstatus
*status
);
115 static ptid_t
remote_async_wait (ptid_t ptid
,
116 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
);
125 static void remote_interrupt (int signo
);
127 static void remote_interrupt_twice (int signo
);
129 static void interrupt_query (void);
131 static void set_thread (int, int);
133 static int remote_thread_alive (ptid_t
);
135 static void get_offsets (void);
137 static long read_frame (char *buf
, long sizeof_buf
);
139 static int remote_insert_breakpoint (CORE_ADDR
, char *);
141 static int remote_remove_breakpoint (CORE_ADDR
, char *);
143 static int hexnumlen (ULONGEST num
);
145 static void init_remote_ops (void);
147 static void init_extended_remote_ops (void);
149 static void remote_stop (void);
151 static int ishex (int ch
, int *val
);
153 static int stubhex (int ch
);
155 static int hexnumstr (char *, ULONGEST
);
157 static int hexnumnstr (char *, ULONGEST
, int);
159 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
161 static void print_packet (char *);
163 static unsigned long crc32 (unsigned char *, int, unsigned int);
165 static void compare_sections_command (char *, int);
167 static void packet_command (char *, int);
169 static int stub_unpack_int (char *buff
, int fieldlength
);
171 static ptid_t
remote_current_thread (ptid_t oldptid
);
173 static void remote_find_new_threads (void);
175 static void record_currthread (int currthread
);
177 static int fromhex (int a
);
179 static int hex2bin (const char *hex
, char *bin
, int count
);
181 static int bin2hex (const char *bin
, char *hex
, int count
);
183 static int putpkt_binary (char *buf
, int cnt
);
185 static void check_binary_download (CORE_ADDR addr
);
187 struct packet_config
;
189 static void show_packet_config_cmd (struct packet_config
*config
);
191 static void update_packet_config (struct packet_config
*config
);
193 void _initialize_remote (void);
195 /* Description of the remote protocol. Strictly speaking, when the
196 target is open()ed, remote.c should create a per-target description
197 of the remote protocol using that target's architecture.
198 Unfortunately, the target stack doesn't include local state. For
199 the moment keep the information in the target's architecture
204 long offset
; /* Offset into G packet. */
205 long regnum
; /* GDB's internal register number. */
206 LONGEST pnum
; /* Remote protocol register number. */
207 int in_g_packet
; /* Always part of G packet. */
208 /* long size in bytes; == register_size (current_gdbarch, regnum); at present. */
209 /* char *name; == REGISTER_NAME (regnum); at present. */
214 /* Description of the remote protocol registers. */
215 long sizeof_g_packet
;
217 /* Description of the remote protocol registers indexed by REGNUM
218 (making an array of NUM_REGS + NUM_PSEUDO_REGS in size). */
219 struct packet_reg
*regs
;
221 /* This is the size (in chars) of the first response to the ``g''
222 packet. It is used as a heuristic when determining the maximum
223 size of memory-read and memory-write packets. A target will
224 typically only reserve a buffer large enough to hold the ``g''
225 packet. The size does not include packet overhead (headers and
227 long actual_register_packet_size
;
229 /* This is the maximum size (in chars) of a non read/write packet.
230 It is also used as a cap on the size of read/write packets. */
231 long remote_packet_size
;
235 /* Handle for retreving the remote protocol data from gdbarch. */
236 static struct gdbarch_data
*remote_gdbarch_data_handle
;
238 static struct remote_state
*
239 get_remote_state (void)
241 return gdbarch_data (current_gdbarch
, remote_gdbarch_data_handle
);
245 init_remote_state (struct gdbarch
*gdbarch
)
248 struct remote_state
*rs
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_state
);
250 if (deprecated_register_bytes () != 0)
251 rs
->sizeof_g_packet
= deprecated_register_bytes ();
253 rs
->sizeof_g_packet
= 0;
255 /* Assume a 1:1 regnum<->pnum table. */
256 rs
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
, NUM_REGS
+ NUM_PSEUDO_REGS
,
258 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
260 struct packet_reg
*r
= &rs
->regs
[regnum
];
263 r
->offset
= DEPRECATED_REGISTER_BYTE (regnum
);
264 r
->in_g_packet
= (regnum
< NUM_REGS
);
265 /* ...name = REGISTER_NAME (regnum); */
267 /* Compute packet size by accumulating the size of all registers. */
268 if (deprecated_register_bytes () == 0)
269 rs
->sizeof_g_packet
+= register_size (current_gdbarch
, regnum
);
272 /* Default maximum number of characters in a packet body. Many
273 remote stubs have a hardwired buffer size of 400 bytes
274 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
275 as the maximum packet-size to ensure that the packet and an extra
276 NUL character can always fit in the buffer. This stops GDB
277 trashing stubs that try to squeeze an extra NUL into what is
278 already a full buffer (As of 1999-12-04 that was most stubs. */
279 rs
->remote_packet_size
= 400 - 1;
281 /* Should rs->sizeof_g_packet needs more space than the
282 default, adjust the size accordingly. Remember that each byte is
283 encoded as two characters. 32 is the overhead for the packet
284 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
285 (``$NN:G...#NN'') is a better guess, the below has been padded a
287 if (rs
->sizeof_g_packet
> ((rs
->remote_packet_size
- 32) / 2))
288 rs
->remote_packet_size
= (rs
->sizeof_g_packet
* 2 + 32);
290 /* This one is filled in when a ``g'' packet is received. */
291 rs
->actual_register_packet_size
= 0;
296 static struct packet_reg
*
297 packet_reg_from_regnum (struct remote_state
*rs
, long regnum
)
299 if (regnum
< 0 && regnum
>= NUM_REGS
+ NUM_PSEUDO_REGS
)
303 struct packet_reg
*r
= &rs
->regs
[regnum
];
304 gdb_assert (r
->regnum
== regnum
);
309 static struct packet_reg
*
310 packet_reg_from_pnum (struct remote_state
*rs
, LONGEST pnum
)
313 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
315 struct packet_reg
*r
= &rs
->regs
[i
];
322 /* FIXME: graces/2002-08-08: These variables should eventually be
323 bound to an instance of the target object (as in gdbarch-tdep()),
324 when such a thing exists. */
326 /* This is set to the data address of the access causing the target
327 to stop for a watchpoint. */
328 static CORE_ADDR remote_watch_data_address
;
330 /* This is non-zero if taregt stopped for a watchpoint. */
331 static int remote_stopped_by_watchpoint_p
;
334 static struct target_ops remote_ops
;
336 static struct target_ops extended_remote_ops
;
338 /* Temporary target ops. Just like the remote_ops and
339 extended_remote_ops, but with asynchronous support. */
340 static struct target_ops remote_async_ops
;
342 static struct target_ops extended_async_remote_ops
;
344 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
345 ``forever'' still use the normal timeout mechanism. This is
346 currently used by the ASYNC code to guarentee that target reads
347 during the initial connect always time-out. Once getpkt has been
348 modified to return a timeout indication and, in turn
349 remote_wait()/wait_for_inferior() have gained a timeout parameter
351 static int wait_forever_enabled_p
= 1;
354 /* This variable chooses whether to send a ^C or a break when the user
355 requests program interruption. Although ^C is usually what remote
356 systems expect, and that is the default here, sometimes a break is
357 preferable instead. */
359 static int remote_break
;
361 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
362 remote_open knows that we don't have a file open when the program
364 static struct serial
*remote_desc
= NULL
;
366 /* This variable sets the number of bits in an address that are to be
367 sent in a memory ("M" or "m") packet. Normally, after stripping
368 leading zeros, the entire address would be sent. This variable
369 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
370 initial implementation of remote.c restricted the address sent in
371 memory packets to ``host::sizeof long'' bytes - (typically 32
372 bits). Consequently, for 64 bit targets, the upper 32 bits of an
373 address was never sent. Since fixing this bug may cause a break in
374 some remote targets this variable is principly provided to
375 facilitate backward compatibility. */
377 static int remote_address_size
;
379 /* Tempoary to track who currently owns the terminal. See
380 target_async_terminal_* for more details. */
382 static int remote_async_terminal_ours_p
;
385 /* User configurable variables for the number of characters in a
386 memory read/write packet. MIN ((rs->remote_packet_size),
387 rs->sizeof_g_packet) is the default. Some targets need smaller
388 values (fifo overruns, et.al.) and some users need larger values
389 (speed up transfers). The variables ``preferred_*'' (the user
390 request), ``current_*'' (what was actually set) and ``forced_*''
391 (Positive - a soft limit, negative - a hard limit). */
393 struct memory_packet_config
400 /* Compute the current size of a read/write packet. Since this makes
401 use of ``actual_register_packet_size'' the computation is dynamic. */
404 get_memory_packet_size (struct memory_packet_config
*config
)
406 struct remote_state
*rs
= get_remote_state ();
407 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
408 law?) that some hosts don't cope very well with large alloca()
409 calls. Eventually the alloca() code will be replaced by calls to
410 xmalloc() and make_cleanups() allowing this restriction to either
411 be lifted or removed. */
412 #ifndef MAX_REMOTE_PACKET_SIZE
413 #define MAX_REMOTE_PACKET_SIZE 16384
415 /* NOTE: 16 is just chosen at random. */
416 #ifndef MIN_REMOTE_PACKET_SIZE
417 #define MIN_REMOTE_PACKET_SIZE 16
422 if (config
->size
<= 0)
423 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
425 what_they_get
= config
->size
;
429 what_they_get
= (rs
->remote_packet_size
);
430 /* Limit the packet to the size specified by the user. */
432 && what_they_get
> config
->size
)
433 what_they_get
= config
->size
;
434 /* Limit it to the size of the targets ``g'' response. */
435 if ((rs
->actual_register_packet_size
) > 0
436 && what_they_get
> (rs
->actual_register_packet_size
))
437 what_they_get
= (rs
->actual_register_packet_size
);
439 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
440 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
441 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
442 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
443 return what_they_get
;
446 /* Update the size of a read/write packet. If they user wants
447 something really big then do a sanity check. */
450 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
452 int fixed_p
= config
->fixed_p
;
453 long size
= config
->size
;
455 error ("Argument required (integer, `fixed' or `limited').");
456 else if (strcmp (args
, "hard") == 0
457 || strcmp (args
, "fixed") == 0)
459 else if (strcmp (args
, "soft") == 0
460 || strcmp (args
, "limit") == 0)
465 size
= strtoul (args
, &end
, 0);
467 error ("Invalid %s (bad syntax).", config
->name
);
469 /* Instead of explicitly capping the size of a packet to
470 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
471 instead allowed to set the size to something arbitrarily
473 if (size
> MAX_REMOTE_PACKET_SIZE
)
474 error ("Invalid %s (too large).", config
->name
);
478 if (fixed_p
&& !config
->fixed_p
)
480 if (! query ("The target may not be able to correctly handle a %s\n"
481 "of %ld bytes. Change the packet size? ",
483 error ("Packet size not changed.");
485 /* Update the config. */
486 config
->fixed_p
= fixed_p
;
491 show_memory_packet_size (struct memory_packet_config
*config
)
493 printf_filtered ("The %s is %ld. ", config
->name
, config
->size
);
495 printf_filtered ("Packets are fixed at %ld bytes.\n",
496 get_memory_packet_size (config
));
498 printf_filtered ("Packets are limited to %ld bytes.\n",
499 get_memory_packet_size (config
));
502 static struct memory_packet_config memory_write_packet_config
=
504 "memory-write-packet-size",
508 set_memory_write_packet_size (char *args
, int from_tty
)
510 set_memory_packet_size (args
, &memory_write_packet_config
);
514 show_memory_write_packet_size (char *args
, int from_tty
)
516 show_memory_packet_size (&memory_write_packet_config
);
520 get_memory_write_packet_size (void)
522 return get_memory_packet_size (&memory_write_packet_config
);
525 static struct memory_packet_config memory_read_packet_config
=
527 "memory-read-packet-size",
531 set_memory_read_packet_size (char *args
, int from_tty
)
533 set_memory_packet_size (args
, &memory_read_packet_config
);
537 show_memory_read_packet_size (char *args
, int from_tty
)
539 show_memory_packet_size (&memory_read_packet_config
);
543 get_memory_read_packet_size (void)
545 struct remote_state
*rs
= get_remote_state ();
546 long size
= get_memory_packet_size (&memory_read_packet_config
);
547 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
548 extra buffer size argument before the memory read size can be
549 increased beyond (rs->remote_packet_size). */
550 if (size
> (rs
->remote_packet_size
))
551 size
= (rs
->remote_packet_size
);
556 /* Generic configuration support for packets the stub optionally
557 supports. Allows the user to specify the use of the packet as well
558 as allowing GDB to auto-detect support in the remote stub. */
562 PACKET_SUPPORT_UNKNOWN
= 0,
571 enum auto_boolean detect
;
572 enum packet_support support
;
575 /* Analyze a packet's return value and update the packet config
586 update_packet_config (struct packet_config
*config
)
588 switch (config
->detect
)
590 case AUTO_BOOLEAN_TRUE
:
591 config
->support
= PACKET_ENABLE
;
593 case AUTO_BOOLEAN_FALSE
:
594 config
->support
= PACKET_DISABLE
;
596 case AUTO_BOOLEAN_AUTO
:
597 config
->support
= PACKET_SUPPORT_UNKNOWN
;
603 show_packet_config_cmd (struct packet_config
*config
)
605 char *support
= "internal-error";
606 switch (config
->support
)
612 support
= "disabled";
614 case PACKET_SUPPORT_UNKNOWN
:
618 switch (config
->detect
)
620 case AUTO_BOOLEAN_AUTO
:
621 printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
622 config
->name
, config
->title
, support
);
624 case AUTO_BOOLEAN_TRUE
:
625 case AUTO_BOOLEAN_FALSE
:
626 printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
627 config
->name
, config
->title
, support
);
633 add_packet_config_cmd (struct packet_config
*config
,
636 cmd_sfunc_ftype
*set_func
,
637 cmd_sfunc_ftype
*show_func
,
638 struct cmd_list_element
**set_remote_list
,
639 struct cmd_list_element
**show_remote_list
,
642 struct cmd_list_element
*set_cmd
;
643 struct cmd_list_element
*show_cmd
;
650 config
->title
= title
;
651 config
->detect
= AUTO_BOOLEAN_AUTO
;
652 config
->support
= PACKET_SUPPORT_UNKNOWN
;
653 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
655 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
657 print
= xstrprintf ("Current use of remote protocol `%s' (%s) is %%s",
659 /* set/show TITLE-packet {auto,on,off} */
660 cmd_name
= xstrprintf ("%s-packet", title
);
661 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
662 &config
->detect
, set_doc
, show_doc
,
665 set_remote_list
, show_remote_list
);
666 /* set/show remote NAME-packet {auto,on,off} -- legacy */
670 legacy_name
= xstrprintf ("%s-packet", name
);
671 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
673 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
678 static enum packet_result
679 packet_ok (const char *buf
, struct packet_config
*config
)
683 /* The stub recognized the packet request. Check that the
684 operation succeeded. */
685 switch (config
->support
)
687 case PACKET_SUPPORT_UNKNOWN
:
689 fprintf_unfiltered (gdb_stdlog
,
690 "Packet %s (%s) is supported\n",
691 config
->name
, config
->title
);
692 config
->support
= PACKET_ENABLE
;
695 internal_error (__FILE__
, __LINE__
,
696 "packet_ok: attempt to use a disabled packet");
701 if (buf
[0] == 'O' && buf
[1] == 'K' && buf
[2] == '\0')
702 /* "OK" - definitly OK. */
705 && isxdigit (buf
[1]) && isxdigit (buf
[2])
707 /* "Enn" - definitly an error. */
709 /* The packet may or may not be OK. Just assume it is */
714 /* The stub does not support the packet. */
715 switch (config
->support
)
718 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
719 /* If the stub previously indicated that the packet was
720 supported then there is a protocol error.. */
721 error ("Protocol error: %s (%s) conflicting enabled responses.",
722 config
->name
, config
->title
);
724 /* The user set it wrong. */
725 error ("Enabled packet %s (%s) not recognized by stub",
726 config
->name
, config
->title
);
728 case PACKET_SUPPORT_UNKNOWN
:
730 fprintf_unfiltered (gdb_stdlog
,
731 "Packet %s (%s) is NOT supported\n",
732 config
->name
, config
->title
);
733 config
->support
= PACKET_DISABLE
;
738 return PACKET_UNKNOWN
;
742 /* Should we try the 'vCont' (descriptive resume) request? */
743 static struct packet_config remote_protocol_vcont
;
746 set_remote_protocol_vcont_packet_cmd (char *args
, int from_tty
,
747 struct cmd_list_element
*c
)
749 update_packet_config (&remote_protocol_vcont
);
753 show_remote_protocol_vcont_packet_cmd (char *args
, int from_tty
,
754 struct cmd_list_element
*c
)
756 show_packet_config_cmd (&remote_protocol_vcont
);
759 /* Should we try the 'qSymbol' (target symbol lookup service) request? */
760 static struct packet_config remote_protocol_qSymbol
;
763 set_remote_protocol_qSymbol_packet_cmd (char *args
, int from_tty
,
764 struct cmd_list_element
*c
)
766 update_packet_config (&remote_protocol_qSymbol
);
770 show_remote_protocol_qSymbol_packet_cmd (char *args
, int from_tty
,
771 struct cmd_list_element
*c
)
773 show_packet_config_cmd (&remote_protocol_qSymbol
);
776 /* Should we try the 'P' (set register) request? */
778 static struct packet_config remote_protocol_P
;
781 set_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
782 struct cmd_list_element
*c
)
784 update_packet_config (&remote_protocol_P
);
788 show_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
789 struct cmd_list_element
*c
)
791 show_packet_config_cmd (&remote_protocol_P
);
794 /* Should we try one of the 'Z' requests? */
798 Z_PACKET_SOFTWARE_BP
,
799 Z_PACKET_HARDWARE_BP
,
806 static struct packet_config remote_protocol_Z
[NR_Z_PACKET_TYPES
];
808 /* FIXME: Instead of having all these boiler plate functions, the
809 command callback should include a context argument. */
812 set_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
813 struct cmd_list_element
*c
)
815 update_packet_config (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
819 show_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
820 struct cmd_list_element
*c
)
822 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
826 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
827 struct cmd_list_element
*c
)
829 update_packet_config (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
833 show_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
834 struct cmd_list_element
*c
)
836 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
840 set_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
841 struct cmd_list_element
*c
)
843 update_packet_config (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
847 show_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
848 struct cmd_list_element
*c
)
850 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
854 set_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
855 struct cmd_list_element
*c
)
857 update_packet_config (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
861 show_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
862 struct cmd_list_element
*c
)
864 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
868 set_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
869 struct cmd_list_element
*c
)
871 update_packet_config (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
875 show_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
876 struct cmd_list_element
*c
)
878 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
881 /* For compatibility with older distributions. Provide a ``set remote
882 Z-packet ...'' command that updates all the Z packet types. */
884 static enum auto_boolean remote_Z_packet_detect
;
887 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
888 struct cmd_list_element
*c
)
891 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
893 remote_protocol_Z
[i
].detect
= remote_Z_packet_detect
;
894 update_packet_config (&remote_protocol_Z
[i
]);
899 show_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
900 struct cmd_list_element
*c
)
903 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
905 show_packet_config_cmd (&remote_protocol_Z
[i
]);
909 /* Should we try the 'X' (remote binary download) packet?
911 This variable (available to the user via "set remote X-packet")
912 dictates whether downloads are sent in binary (via the 'X' packet).
913 We assume that the stub can, and attempt to do it. This will be
914 cleared if the stub does not understand it. This switch is still
915 needed, though in cases when the packet is supported in the stub,
916 but the connection does not allow it (i.e., 7-bit serial connection
919 static struct packet_config remote_protocol_binary_download
;
921 /* Should we try the 'ThreadInfo' query packet?
923 This variable (NOT available to the user: auto-detect only!)
924 determines whether GDB will use the new, simpler "ThreadInfo"
925 query or the older, more complex syntax for thread queries.
926 This is an auto-detect variable (set to true at each connect,
927 and set to false when the target fails to recognize it). */
929 static int use_threadinfo_query
;
930 static int use_threadextra_query
;
933 set_remote_protocol_binary_download_cmd (char *args
,
935 struct cmd_list_element
*c
)
937 update_packet_config (&remote_protocol_binary_download
);
941 show_remote_protocol_binary_download_cmd (char *args
, int from_tty
,
942 struct cmd_list_element
*c
)
944 show_packet_config_cmd (&remote_protocol_binary_download
);
947 /* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */
948 static struct packet_config remote_protocol_qPart_auxv
;
951 set_remote_protocol_qPart_auxv_packet_cmd (char *args
, int from_tty
,
952 struct cmd_list_element
*c
)
954 update_packet_config (&remote_protocol_qPart_auxv
);
958 show_remote_protocol_qPart_auxv_packet_cmd (char *args
, int from_tty
,
959 struct cmd_list_element
*c
)
961 show_packet_config_cmd (&remote_protocol_qPart_auxv
);
964 static struct packet_config remote_protocol_p
;
967 set_remote_protocol_p_packet_cmd (char *args
, int from_tty
,
968 struct cmd_list_element
*c
)
970 update_packet_config (&remote_protocol_p
);
974 show_remote_protocol_p_packet_cmd (char *args
, int from_tty
,
975 struct cmd_list_element
*c
)
977 show_packet_config_cmd (&remote_protocol_p
);
982 /* Tokens for use by the asynchronous signal handlers for SIGINT */
983 static void *sigint_remote_twice_token
;
984 static void *sigint_remote_token
;
986 /* These are pointers to hook functions that may be set in order to
987 modify resume/wait behavior for a particular architecture. */
989 void (*deprecated_target_resume_hook
) (void);
990 void (*deprecated_target_wait_loop_hook
) (void);
994 /* These are the threads which we last sent to the remote system.
995 -1 for all or -2 for not sent yet. */
996 static int general_thread
;
997 static int continue_thread
;
999 /* Call this function as a result of
1000 1) A halt indication (T packet) containing a thread id
1001 2) A direct query of currthread
1002 3) Successful execution of set thread
1006 record_currthread (int currthread
)
1008 general_thread
= currthread
;
1010 /* If this is a new thread, add it to GDB's thread list.
1011 If we leave it up to WFI to do this, bad things will happen. */
1012 if (!in_thread_list (pid_to_ptid (currthread
)))
1014 add_thread (pid_to_ptid (currthread
));
1015 ui_out_text (uiout
, "[New ");
1016 ui_out_text (uiout
, target_pid_to_str (pid_to_ptid (currthread
)));
1017 ui_out_text (uiout
, "]\n");
1021 #define MAGIC_NULL_PID 42000
1024 set_thread (int th
, int gen
)
1026 struct remote_state
*rs
= get_remote_state ();
1027 char *buf
= alloca (rs
->remote_packet_size
);
1028 int state
= gen
? general_thread
: continue_thread
;
1034 buf
[1] = gen
? 'g' : 'c';
1035 if (th
== MAGIC_NULL_PID
)
1041 sprintf (&buf
[2], "-%x", -th
);
1043 sprintf (&buf
[2], "%x", th
);
1045 getpkt (buf
, (rs
->remote_packet_size
), 0);
1047 general_thread
= th
;
1049 continue_thread
= th
;
1052 /* Return nonzero if the thread TH is still alive on the remote system. */
1055 remote_thread_alive (ptid_t ptid
)
1057 int tid
= PIDGET (ptid
);
1061 sprintf (buf
, "T-%08x", -tid
);
1063 sprintf (buf
, "T%08x", tid
);
1065 getpkt (buf
, sizeof (buf
), 0);
1066 return (buf
[0] == 'O' && buf
[1] == 'K');
1069 /* About these extended threadlist and threadinfo packets. They are
1070 variable length packets but, the fields within them are often fixed
1071 length. They are redundent enough to send over UDP as is the
1072 remote protocol in general. There is a matching unit test module
1075 #define OPAQUETHREADBYTES 8
1077 /* a 64 bit opaque identifier */
1078 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1080 /* WARNING: This threadref data structure comes from the remote O.S., libstub
1081 protocol encoding, and remote.c. it is not particularly changable */
1083 /* Right now, the internal structure is int. We want it to be bigger.
1087 typedef int gdb_threadref
; /* internal GDB thread reference */
1089 /* gdb_ext_thread_info is an internal GDB data structure which is
1090 equivalint to the reply of the remote threadinfo packet */
1092 struct gdb_ext_thread_info
1094 threadref threadid
; /* External form of thread reference */
1095 int active
; /* Has state interesting to GDB? , regs, stack */
1096 char display
[256]; /* Brief state display, name, blocked/syspended */
1097 char shortname
[32]; /* To be used to name threads */
1098 char more_display
[256]; /* Long info, statistics, queue depth, whatever */
1101 /* The volume of remote transfers can be limited by submitting
1102 a mask containing bits specifying the desired information.
1103 Use a union of these values as the 'selection' parameter to
1104 get_thread_info. FIXME: Make these TAG names more thread specific.
1107 #define TAG_THREADID 1
1108 #define TAG_EXISTS 2
1109 #define TAG_DISPLAY 4
1110 #define TAG_THREADNAME 8
1111 #define TAG_MOREDISPLAY 16
1113 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
1115 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1117 static char *unpack_nibble (char *buf
, int *val
);
1119 static char *pack_nibble (char *buf
, int nibble
);
1121 static char *pack_hex_byte (char *pkt
, int /*unsigned char */ byte
);
1123 static char *unpack_byte (char *buf
, int *value
);
1125 static char *pack_int (char *buf
, int value
);
1127 static char *unpack_int (char *buf
, int *value
);
1129 static char *unpack_string (char *src
, char *dest
, int length
);
1131 static char *pack_threadid (char *pkt
, threadref
* id
);
1133 static char *unpack_threadid (char *inbuf
, threadref
* id
);
1135 void int_to_threadref (threadref
* id
, int value
);
1137 static int threadref_to_int (threadref
* ref
);
1139 static void copy_threadref (threadref
* dest
, threadref
* src
);
1141 static int threadmatch (threadref
* dest
, threadref
* src
);
1143 static char *pack_threadinfo_request (char *pkt
, int mode
, threadref
* id
);
1145 static int remote_unpack_thread_info_response (char *pkt
,
1146 threadref
* expectedref
,
1147 struct gdb_ext_thread_info
1151 static int remote_get_threadinfo (threadref
* threadid
, int fieldset
, /*TAG mask */
1152 struct gdb_ext_thread_info
*info
);
1154 static char *pack_threadlist_request (char *pkt
, int startflag
,
1156 threadref
* nextthread
);
1158 static int parse_threadlist_response (char *pkt
,
1160 threadref
* original_echo
,
1161 threadref
* resultlist
, int *doneflag
);
1163 static int remote_get_threadlist (int startflag
,
1164 threadref
* nextthread
,
1167 int *result_count
, threadref
* threadlist
);
1169 typedef int (*rmt_thread_action
) (threadref
* ref
, void *context
);
1171 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1172 void *context
, int looplimit
);
1174 static int remote_newthread_step (threadref
* ref
, void *context
);
1176 /* encode 64 bits in 16 chars of hex */
1178 static const char hexchars
[] = "0123456789abcdef";
1181 ishex (int ch
, int *val
)
1183 if ((ch
>= 'a') && (ch
<= 'f'))
1185 *val
= ch
- 'a' + 10;
1188 if ((ch
>= 'A') && (ch
<= 'F'))
1190 *val
= ch
- 'A' + 10;
1193 if ((ch
>= '0') && (ch
<= '9'))
1204 if (ch
>= 'a' && ch
<= 'f')
1205 return ch
- 'a' + 10;
1206 if (ch
>= '0' && ch
<= '9')
1208 if (ch
>= 'A' && ch
<= 'F')
1209 return ch
- 'A' + 10;
1214 stub_unpack_int (char *buff
, int fieldlength
)
1221 nibble
= stubhex (*buff
++);
1225 retval
= retval
<< 4;
1231 unpack_varlen_hex (char *buff
, /* packet to parse */
1237 while (ishex (*buff
, &nibble
))
1240 retval
= retval
<< 4;
1241 retval
|= nibble
& 0x0f;
1248 unpack_nibble (char *buf
, int *val
)
1250 ishex (*buf
++, val
);
1255 pack_nibble (char *buf
, int nibble
)
1257 *buf
++ = hexchars
[(nibble
& 0x0f)];
1262 pack_hex_byte (char *pkt
, int byte
)
1264 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1265 *pkt
++ = hexchars
[(byte
& 0xf)];
1270 unpack_byte (char *buf
, int *value
)
1272 *value
= stub_unpack_int (buf
, 2);
1277 pack_int (char *buf
, int value
)
1279 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1280 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1281 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1282 buf
= pack_hex_byte (buf
, (value
& 0xff));
1287 unpack_int (char *buf
, int *value
)
1289 *value
= stub_unpack_int (buf
, 8);
1293 #if 0 /* currently unused, uncomment when needed */
1294 static char *pack_string (char *pkt
, char *string
);
1297 pack_string (char *pkt
, char *string
)
1302 len
= strlen (string
);
1304 len
= 200; /* Bigger than most GDB packets, junk??? */
1305 pkt
= pack_hex_byte (pkt
, len
);
1309 if ((ch
== '\0') || (ch
== '#'))
1310 ch
= '*'; /* Protect encapsulation */
1315 #endif /* 0 (unused) */
1318 unpack_string (char *src
, char *dest
, int length
)
1327 pack_threadid (char *pkt
, threadref
*id
)
1330 unsigned char *altid
;
1332 altid
= (unsigned char *) id
;
1333 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1335 pkt
= pack_hex_byte (pkt
, *altid
++);
1341 unpack_threadid (char *inbuf
, threadref
*id
)
1344 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1347 altref
= (char *) id
;
1349 while (inbuf
< limit
)
1351 x
= stubhex (*inbuf
++);
1352 y
= stubhex (*inbuf
++);
1353 *altref
++ = (x
<< 4) | y
;
1358 /* Externally, threadrefs are 64 bits but internally, they are still
1359 ints. This is due to a mismatch of specifications. We would like
1360 to use 64bit thread references internally. This is an adapter
1364 int_to_threadref (threadref
*id
, int value
)
1366 unsigned char *scan
;
1368 scan
= (unsigned char *) id
;
1374 *scan
++ = (value
>> 24) & 0xff;
1375 *scan
++ = (value
>> 16) & 0xff;
1376 *scan
++ = (value
>> 8) & 0xff;
1377 *scan
++ = (value
& 0xff);
1381 threadref_to_int (threadref
*ref
)
1384 unsigned char *scan
;
1386 scan
= (char *) ref
;
1390 value
= (value
<< 8) | ((*scan
++) & 0xff);
1395 copy_threadref (threadref
*dest
, threadref
*src
)
1398 unsigned char *csrc
, *cdest
;
1400 csrc
= (unsigned char *) src
;
1401 cdest
= (unsigned char *) dest
;
1408 threadmatch (threadref
*dest
, threadref
*src
)
1410 /* things are broken right now, so just assume we got a match */
1412 unsigned char *srcp
, *destp
;
1414 srcp
= (char *) src
;
1415 destp
= (char *) dest
;
1419 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1426 threadid:1, # always request threadid
1433 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1436 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1438 *pkt
++ = 'q'; /* Info Query */
1439 *pkt
++ = 'P'; /* process or thread info */
1440 pkt
= pack_int (pkt
, mode
); /* mode */
1441 pkt
= pack_threadid (pkt
, id
); /* threadid */
1442 *pkt
= '\0'; /* terminate */
1446 /* These values tag the fields in a thread info response packet */
1447 /* Tagging the fields allows us to request specific fields and to
1448 add more fields as time goes by */
1450 #define TAG_THREADID 1 /* Echo the thread identifier */
1451 #define TAG_EXISTS 2 /* Is this process defined enough to
1452 fetch registers and its stack */
1453 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1454 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
1455 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1459 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1460 struct gdb_ext_thread_info
*info
)
1462 struct remote_state
*rs
= get_remote_state ();
1466 char *limit
= pkt
+ (rs
->remote_packet_size
); /* plausable parsing limit */
1469 /* info->threadid = 0; FIXME: implement zero_threadref */
1471 info
->display
[0] = '\0';
1472 info
->shortname
[0] = '\0';
1473 info
->more_display
[0] = '\0';
1475 /* Assume the characters indicating the packet type have been stripped */
1476 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1477 pkt
= unpack_threadid (pkt
, &ref
);
1480 warning ("Incomplete response to threadinfo request\n");
1481 if (!threadmatch (&ref
, expectedref
))
1482 { /* This is an answer to a different request */
1483 warning ("ERROR RMT Thread info mismatch\n");
1486 copy_threadref (&info
->threadid
, &ref
);
1488 /* Loop on tagged fields , try to bail if somthing goes wrong */
1490 while ((pkt
< limit
) && mask
&& *pkt
) /* packets are terminated with nulls */
1492 pkt
= unpack_int (pkt
, &tag
); /* tag */
1493 pkt
= unpack_byte (pkt
, &length
); /* length */
1494 if (!(tag
& mask
)) /* tags out of synch with mask */
1496 warning ("ERROR RMT: threadinfo tag mismatch\n");
1500 if (tag
== TAG_THREADID
)
1504 warning ("ERROR RMT: length of threadid is not 16\n");
1508 pkt
= unpack_threadid (pkt
, &ref
);
1509 mask
= mask
& ~TAG_THREADID
;
1512 if (tag
== TAG_EXISTS
)
1514 info
->active
= stub_unpack_int (pkt
, length
);
1516 mask
= mask
& ~(TAG_EXISTS
);
1519 warning ("ERROR RMT: 'exists' length too long\n");
1525 if (tag
== TAG_THREADNAME
)
1527 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1528 mask
= mask
& ~TAG_THREADNAME
;
1531 if (tag
== TAG_DISPLAY
)
1533 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1534 mask
= mask
& ~TAG_DISPLAY
;
1537 if (tag
== TAG_MOREDISPLAY
)
1539 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1540 mask
= mask
& ~TAG_MOREDISPLAY
;
1543 warning ("ERROR RMT: unknown thread info tag\n");
1544 break; /* Not a tag we know about */
1550 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1551 struct gdb_ext_thread_info
*info
)
1553 struct remote_state
*rs
= get_remote_state ();
1555 char *threadinfo_pkt
= alloca (rs
->remote_packet_size
);
1557 pack_threadinfo_request (threadinfo_pkt
, fieldset
, threadid
);
1558 putpkt (threadinfo_pkt
);
1559 getpkt (threadinfo_pkt
, (rs
->remote_packet_size
), 0);
1560 result
= remote_unpack_thread_info_response (threadinfo_pkt
+ 2, threadid
,
1565 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1568 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1569 threadref
*nextthread
)
1571 *pkt
++ = 'q'; /* info query packet */
1572 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1573 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1574 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1575 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1580 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1583 parse_threadlist_response (char *pkt
, int result_limit
,
1584 threadref
*original_echo
, threadref
*resultlist
,
1587 struct remote_state
*rs
= get_remote_state ();
1589 int count
, resultcount
, done
;
1592 /* Assume the 'q' and 'M chars have been stripped. */
1593 limit
= pkt
+ ((rs
->remote_packet_size
) - BUF_THREAD_ID_SIZE
); /* done parse past here */
1594 pkt
= unpack_byte (pkt
, &count
); /* count field */
1595 pkt
= unpack_nibble (pkt
, &done
);
1596 /* The first threadid is the argument threadid. */
1597 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1598 while ((count
-- > 0) && (pkt
< limit
))
1600 pkt
= unpack_threadid (pkt
, resultlist
++);
1601 if (resultcount
++ >= result_limit
)
1610 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1611 int *done
, int *result_count
, threadref
*threadlist
)
1613 struct remote_state
*rs
= get_remote_state ();
1614 static threadref echo_nextthread
;
1615 char *threadlist_packet
= alloca (rs
->remote_packet_size
);
1616 char *t_response
= alloca (rs
->remote_packet_size
);
1619 /* Trancate result limit to be smaller than the packet size */
1620 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= (rs
->remote_packet_size
))
1621 result_limit
= ((rs
->remote_packet_size
) / BUF_THREAD_ID_SIZE
) - 2;
1623 pack_threadlist_request (threadlist_packet
,
1624 startflag
, result_limit
, nextthread
);
1625 putpkt (threadlist_packet
);
1626 getpkt (t_response
, (rs
->remote_packet_size
), 0);
1629 parse_threadlist_response (t_response
+ 2, result_limit
, &echo_nextthread
,
1632 if (!threadmatch (&echo_nextthread
, nextthread
))
1634 /* FIXME: This is a good reason to drop the packet */
1635 /* Possably, there is a duplicate response */
1637 retransmit immediatly - race conditions
1638 retransmit after timeout - yes
1640 wait for packet, then exit
1642 warning ("HMM: threadlist did not echo arg thread, dropping it\n");
1643 return 0; /* I choose simply exiting */
1645 if (*result_count
<= 0)
1649 warning ("RMT ERROR : failed to get remote thread list\n");
1652 return result
; /* break; */
1654 if (*result_count
> result_limit
)
1657 warning ("RMT ERROR: threadlist response longer than requested\n");
1663 /* This is the interface between remote and threads, remotes upper interface */
1665 /* remote_find_new_threads retrieves the thread list and for each
1666 thread in the list, looks up the thread in GDB's internal list,
1667 ading the thread if it does not already exist. This involves
1668 getting partial thread lists from the remote target so, polling the
1669 quit_flag is required. */
1672 /* About this many threadisds fit in a packet. */
1674 #define MAXTHREADLISTRESULTS 32
1677 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1680 int done
, i
, result_count
;
1684 static threadref nextthread
;
1685 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1690 if (loopcount
++ > looplimit
)
1693 warning ("Remote fetch threadlist -infinite loop-\n");
1696 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1697 &done
, &result_count
, resultthreadlist
))
1702 /* clear for later iterations */
1704 /* Setup to resume next batch of thread references, set nextthread. */
1705 if (result_count
>= 1)
1706 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1708 while (result_count
--)
1709 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1716 remote_newthread_step (threadref
*ref
, void *context
)
1720 ptid
= pid_to_ptid (threadref_to_int (ref
));
1722 if (!in_thread_list (ptid
))
1724 return 1; /* continue iterator */
1727 #define CRAZY_MAX_THREADS 1000
1730 remote_current_thread (ptid_t oldpid
)
1732 struct remote_state
*rs
= get_remote_state ();
1733 char *buf
= alloca (rs
->remote_packet_size
);
1736 getpkt (buf
, (rs
->remote_packet_size
), 0);
1737 if (buf
[0] == 'Q' && buf
[1] == 'C')
1738 return pid_to_ptid (strtol (&buf
[2], NULL
, 16));
1743 /* Find new threads for info threads command.
1744 * Original version, using John Metzler's thread protocol.
1748 remote_find_new_threads (void)
1750 remote_threadlist_iterator (remote_newthread_step
, 0,
1752 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
) /* ack ack ack */
1753 inferior_ptid
= remote_current_thread (inferior_ptid
);
1757 * Find all threads for info threads command.
1758 * Uses new thread protocol contributed by Cisco.
1759 * Falls back and attempts to use the older method (above)
1760 * if the target doesn't respond to the new method.
1764 remote_threads_info (void)
1766 struct remote_state
*rs
= get_remote_state ();
1767 char *buf
= alloca (rs
->remote_packet_size
);
1771 if (remote_desc
== 0) /* paranoia */
1772 error ("Command can only be used when connected to the remote target.");
1774 if (use_threadinfo_query
)
1776 putpkt ("qfThreadInfo");
1778 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1779 if (bufp
[0] != '\0') /* q packet recognized */
1781 while (*bufp
++ == 'm') /* reply contains one or more TID */
1785 tid
= strtol (bufp
, &bufp
, 16);
1786 if (tid
!= 0 && !in_thread_list (pid_to_ptid (tid
)))
1787 add_thread (pid_to_ptid (tid
));
1789 while (*bufp
++ == ','); /* comma-separated list */
1790 putpkt ("qsThreadInfo");
1792 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1798 /* Else fall back to old method based on jmetzler protocol. */
1799 use_threadinfo_query
= 0;
1800 remote_find_new_threads ();
1805 * Collect a descriptive string about the given thread.
1806 * The target may say anything it wants to about the thread
1807 * (typically info about its blocked / runnable state, name, etc.).
1808 * This string will appear in the info threads display.
1810 * Optional: targets are not required to implement this function.
1814 remote_threads_extra_info (struct thread_info
*tp
)
1816 struct remote_state
*rs
= get_remote_state ();
1820 struct gdb_ext_thread_info threadinfo
;
1821 static char display_buf
[100]; /* arbitrary... */
1822 char *bufp
= alloca (rs
->remote_packet_size
);
1823 int n
= 0; /* position in display_buf */
1825 if (remote_desc
== 0) /* paranoia */
1826 internal_error (__FILE__
, __LINE__
,
1827 "remote_threads_extra_info");
1829 if (use_threadextra_query
)
1831 sprintf (bufp
, "qThreadExtraInfo,%x", PIDGET (tp
->ptid
));
1833 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1836 n
= min (strlen (bufp
) / 2, sizeof (display_buf
));
1837 result
= hex2bin (bufp
, display_buf
, n
);
1838 display_buf
[result
] = '\0';
1843 /* If the above query fails, fall back to the old method. */
1844 use_threadextra_query
= 0;
1845 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1846 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1847 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1848 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1849 if (threadinfo
.active
)
1851 if (*threadinfo
.shortname
)
1852 n
+= sprintf(&display_buf
[0], " Name: %s,", threadinfo
.shortname
);
1853 if (*threadinfo
.display
)
1854 n
+= sprintf(&display_buf
[n
], " State: %s,", threadinfo
.display
);
1855 if (*threadinfo
.more_display
)
1856 n
+= sprintf(&display_buf
[n
], " Priority: %s",
1857 threadinfo
.more_display
);
1861 /* for purely cosmetic reasons, clear up trailing commas */
1862 if (',' == display_buf
[n
-1])
1863 display_buf
[n
-1] = ' ';
1872 /* Restart the remote side; this is an extended protocol operation. */
1875 extended_remote_restart (void)
1877 struct remote_state
*rs
= get_remote_state ();
1878 char *buf
= alloca (rs
->remote_packet_size
);
1880 /* Send the restart command; for reasons I don't understand the
1881 remote side really expects a number after the "R". */
1883 sprintf (&buf
[1], "%x", 0);
1886 /* Now query for status so this looks just like we restarted
1887 gdbserver from scratch. */
1889 getpkt (buf
, (rs
->remote_packet_size
), 0);
1892 /* Clean up connection to a remote debugger. */
1895 remote_close (int quitting
)
1898 serial_close (remote_desc
);
1902 /* Query the remote side for the text, data and bss offsets. */
1907 struct remote_state
*rs
= get_remote_state ();
1908 char *buf
= alloca (rs
->remote_packet_size
);
1911 CORE_ADDR text_addr
, data_addr
, bss_addr
;
1912 struct section_offsets
*offs
;
1914 putpkt ("qOffsets");
1916 getpkt (buf
, (rs
->remote_packet_size
), 0);
1918 if (buf
[0] == '\000')
1919 return; /* Return silently. Stub doesn't support
1923 warning ("Remote failure reply: %s", buf
);
1927 /* Pick up each field in turn. This used to be done with scanf, but
1928 scanf will make trouble if CORE_ADDR size doesn't match
1929 conversion directives correctly. The following code will work
1930 with any size of CORE_ADDR. */
1931 text_addr
= data_addr
= bss_addr
= 0;
1935 if (strncmp (ptr
, "Text=", 5) == 0)
1938 /* Don't use strtol, could lose on big values. */
1939 while (*ptr
&& *ptr
!= ';')
1940 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
1945 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
1948 while (*ptr
&& *ptr
!= ';')
1949 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
1954 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
1957 while (*ptr
&& *ptr
!= ';')
1958 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
1964 error ("Malformed response to offset query, %s", buf
);
1966 if (symfile_objfile
== NULL
)
1969 offs
= ((struct section_offsets
*)
1970 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
1971 memcpy (offs
, symfile_objfile
->section_offsets
,
1972 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
1974 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
1976 /* This is a temporary kludge to force data and bss to use the same offsets
1977 because that's what nlmconv does now. The real solution requires changes
1978 to the stub and remote.c that I don't have time to do right now. */
1980 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
1981 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
1983 objfile_relocate (symfile_objfile
, offs
);
1986 /* Stub for catch_errors. */
1989 remote_start_remote_dummy (struct ui_out
*uiout
, void *dummy
)
1991 start_remote (); /* Initialize gdb process mechanisms */
1992 /* NOTE: Return something >=0. A -ve value is reserved for
1993 catch_exceptions. */
1998 remote_start_remote (struct ui_out
*uiout
, void *dummy
)
2000 immediate_quit
++; /* Allow user to interrupt it */
2002 /* Ack any packet which the remote side has already sent. */
2003 serial_write (remote_desc
, "+", 1);
2005 /* Let the stub know that we want it to return the thread. */
2008 inferior_ptid
= remote_current_thread (inferior_ptid
);
2010 get_offsets (); /* Get text, data & bss offsets */
2012 putpkt ("?"); /* initiate a query from remote machine */
2015 /* NOTE: See comment above in remote_start_remote_dummy(). This
2016 function returns something >=0. */
2017 return remote_start_remote_dummy (uiout
, dummy
);
2020 /* Open a connection to a remote debugger.
2021 NAME is the filename used for communication. */
2024 remote_open (char *name
, int from_tty
)
2026 remote_open_1 (name
, from_tty
, &remote_ops
, 0, 0);
2029 /* Just like remote_open, but with asynchronous support. */
2031 remote_async_open (char *name
, int from_tty
)
2033 remote_open_1 (name
, from_tty
, &remote_async_ops
, 0, 1);
2036 /* Open a connection to a remote debugger using the extended
2037 remote gdb protocol. NAME is the filename used for communication. */
2040 extended_remote_open (char *name
, int from_tty
)
2042 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */,
2046 /* Just like extended_remote_open, but with asynchronous support. */
2048 extended_remote_async_open (char *name
, int from_tty
)
2050 remote_open_1 (name
, from_tty
, &extended_async_remote_ops
,
2051 1 /*extended_p */, 1 /* async_p */);
2054 /* Generic code for opening a connection to a remote target. */
2057 init_all_packet_configs (void)
2060 update_packet_config (&remote_protocol_P
);
2061 update_packet_config (&remote_protocol_p
);
2062 update_packet_config (&remote_protocol_qSymbol
);
2063 update_packet_config (&remote_protocol_vcont
);
2064 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2065 update_packet_config (&remote_protocol_Z
[i
]);
2066 /* Force remote_write_bytes to check whether target supports binary
2068 update_packet_config (&remote_protocol_binary_download
);
2069 update_packet_config (&remote_protocol_qPart_auxv
);
2072 /* Symbol look-up. */
2075 remote_check_symbols (struct objfile
*objfile
)
2077 struct remote_state
*rs
= get_remote_state ();
2078 char *msg
, *reply
, *tmp
;
2079 struct minimal_symbol
*sym
;
2082 if (remote_protocol_qSymbol
.support
== PACKET_DISABLE
)
2085 msg
= alloca (rs
->remote_packet_size
);
2086 reply
= alloca (rs
->remote_packet_size
);
2088 /* Invite target to request symbol lookups. */
2090 putpkt ("qSymbol::");
2091 getpkt (reply
, (rs
->remote_packet_size
), 0);
2092 packet_ok (reply
, &remote_protocol_qSymbol
);
2094 while (strncmp (reply
, "qSymbol:", 8) == 0)
2097 end
= hex2bin (tmp
, msg
, strlen (tmp
) / 2);
2099 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2101 sprintf (msg
, "qSymbol::%s", &reply
[8]);
2103 sprintf (msg
, "qSymbol:%s:%s",
2104 paddr_nz (SYMBOL_VALUE_ADDRESS (sym
)),
2107 getpkt (reply
, (rs
->remote_packet_size
), 0);
2111 static struct serial
*
2112 remote_serial_open (char *name
)
2114 static int udp_warning
= 0;
2116 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2117 of in ser-tcp.c, because it is the remote protocol assuming that the
2118 serial connection is reliable and not the serial connection promising
2120 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2122 warning ("The remote protocol may be unreliable over UDP.");
2123 warning ("Some events may be lost, rendering further debugging "
2128 return serial_open (name
);
2132 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2133 int extended_p
, int async_p
)
2136 struct remote_state
*rs
= get_remote_state ();
2138 error ("To open a remote debug connection, you need to specify what\n"
2139 "serial device is attached to the remote system\n"
2140 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2142 /* See FIXME above */
2144 wait_forever_enabled_p
= 1;
2146 reopen_exec_file ();
2149 target_preopen (from_tty
);
2151 unpush_target (target
);
2153 remote_desc
= remote_serial_open (name
);
2155 perror_with_name (name
);
2157 if (baud_rate
!= -1)
2159 if (serial_setbaudrate (remote_desc
, baud_rate
))
2161 /* The requested speed could not be set. Error out to
2162 top level after closing remote_desc. Take care to
2163 set remote_desc to NULL to avoid closing remote_desc
2165 serial_close (remote_desc
);
2167 perror_with_name (name
);
2171 serial_raw (remote_desc
);
2173 /* If there is something sitting in the buffer we might take it as a
2174 response to a command, which would be bad. */
2175 serial_flush_input (remote_desc
);
2179 puts_filtered ("Remote debugging using ");
2180 puts_filtered (name
);
2181 puts_filtered ("\n");
2183 push_target (target
); /* Switch to using remote target now */
2185 init_all_packet_configs ();
2187 general_thread
= -2;
2188 continue_thread
= -2;
2190 /* Probe for ability to use "ThreadInfo" query, as required. */
2191 use_threadinfo_query
= 1;
2192 use_threadextra_query
= 1;
2194 /* Without this, some commands which require an active target (such
2195 as kill) won't work. This variable serves (at least) double duty
2196 as both the pid of the target process (if it has such), and as a
2197 flag indicating that a target is active. These functions should
2198 be split out into seperate variables, especially since GDB will
2199 someday have a notion of debugging several processes. */
2201 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2205 /* With this target we start out by owning the terminal. */
2206 remote_async_terminal_ours_p
= 1;
2208 /* FIXME: cagney/1999-09-23: During the initial connection it is
2209 assumed that the target is already ready and able to respond to
2210 requests. Unfortunately remote_start_remote() eventually calls
2211 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2212 around this. Eventually a mechanism that allows
2213 wait_for_inferior() to expect/get timeouts will be
2215 wait_forever_enabled_p
= 0;
2218 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2219 /* First delete any symbols previously loaded from shared libraries. */
2220 no_shared_libraries (NULL
, 0);
2223 /* Start the remote connection. If error() or QUIT, discard this
2224 target (we'd otherwise be in an inconsistent state) and then
2225 propogate the error on up the exception chain. This ensures that
2226 the caller doesn't stumble along blindly assuming that the
2227 function succeeded. The CLI doesn't have this problem but other
2228 UI's, such as MI do.
2230 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2231 this function should return an error indication letting the
2232 caller restore the previous state. Unfortunately the command
2233 ``target remote'' is directly wired to this function making that
2234 impossible. On a positive note, the CLI side of this problem has
2235 been fixed - the function set_cmd_context() makes it possible for
2236 all the ``target ....'' commands to share a common callback
2237 function. See cli-dump.c. */
2238 ex
= catch_exceptions (uiout
,
2239 remote_start_remote
, NULL
,
2240 "Couldn't establish connection to remote"
2247 wait_forever_enabled_p
= 1;
2248 throw_exception (ex
);
2252 wait_forever_enabled_p
= 1;
2256 /* Tell the remote that we are using the extended protocol. */
2257 char *buf
= alloca (rs
->remote_packet_size
);
2259 getpkt (buf
, (rs
->remote_packet_size
), 0);
2261 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2262 /* FIXME: need a master target_open vector from which all
2263 remote_opens can be called, so that stuff like this can
2264 go there. Failing that, the following code must be copied
2265 to the open function for any remote target that wants to
2266 support svr4 shared libraries. */
2268 /* Set up to detect and load shared libraries. */
2269 if (exec_bfd
) /* No use without an exec file. */
2271 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
2272 remote_check_symbols (symfile_objfile
);
2277 /* This takes a program previously attached to and detaches it. After
2278 this is done, GDB can be used to debug some other program. We
2279 better not have left any breakpoints in the target program or it'll
2280 die when it hits one. */
2283 remote_detach (char *args
, int from_tty
)
2285 struct remote_state
*rs
= get_remote_state ();
2286 char *buf
= alloca (rs
->remote_packet_size
);
2289 error ("Argument given to \"detach\" when remotely debugging.");
2291 /* Tell the remote target to detach. */
2293 remote_send (buf
, (rs
->remote_packet_size
));
2295 /* Unregister the file descriptor from the event loop. */
2296 if (target_is_async_p ())
2297 serial_async (remote_desc
, NULL
, 0);
2299 target_mourn_inferior ();
2301 puts_filtered ("Ending remote debugging.\n");
2304 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2307 remote_disconnect (char *args
, int from_tty
)
2309 struct remote_state
*rs
= get_remote_state ();
2310 char *buf
= alloca (rs
->remote_packet_size
);
2313 error ("Argument given to \"detach\" when remotely debugging.");
2315 /* Unregister the file descriptor from the event loop. */
2316 if (target_is_async_p ())
2317 serial_async (remote_desc
, NULL
, 0);
2319 target_mourn_inferior ();
2321 puts_filtered ("Ending remote debugging.\n");
2324 /* Convert hex digit A to a number. */
2329 if (a
>= '0' && a
<= '9')
2331 else if (a
>= 'a' && a
<= 'f')
2332 return a
- 'a' + 10;
2333 else if (a
>= 'A' && a
<= 'F')
2334 return a
- 'A' + 10;
2336 error ("Reply contains invalid hex digit %d", a
);
2340 hex2bin (const char *hex
, char *bin
, int count
)
2344 for (i
= 0; i
< count
; i
++)
2346 if (hex
[0] == 0 || hex
[1] == 0)
2348 /* Hex string is short, or of uneven length.
2349 Return the count that has been converted so far. */
2352 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
2358 /* Convert number NIB to a hex digit. */
2366 return 'a' + nib
- 10;
2370 bin2hex (const char *bin
, char *hex
, int count
)
2373 /* May use a length, or a nul-terminated string as input. */
2375 count
= strlen (bin
);
2377 for (i
= 0; i
< count
; i
++)
2379 *hex
++ = tohex ((*bin
>> 4) & 0xf);
2380 *hex
++ = tohex (*bin
++ & 0xf);
2386 /* Check for the availability of vCont. This function should also check
2390 remote_vcont_probe (struct remote_state
*rs
, char *buf
)
2392 strcpy (buf
, "vCont?");
2394 getpkt (buf
, rs
->remote_packet_size
, 0);
2396 /* Make sure that the features we assume are supported. */
2397 if (strncmp (buf
, "vCont", 5) == 0)
2400 int support_s
, support_S
, support_c
, support_C
;
2406 while (p
&& *p
== ';')
2409 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2411 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2413 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2415 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2418 p
= strchr (p
, ';');
2421 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2422 BUF will make packet_ok disable the packet. */
2423 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
2427 packet_ok (buf
, &remote_protocol_vcont
);
2430 /* Resume the remote inferior by using a "vCont" packet. The thread
2431 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2432 resumed thread should be single-stepped and/or signalled. If PTID's
2433 PID is -1, then all threads are resumed; the thread to be stepped and/or
2434 signalled is given in the global INFERIOR_PTID. This function returns
2435 non-zero iff it resumes the inferior.
2437 This function issues a strict subset of all possible vCont commands at the
2441 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2443 struct remote_state
*rs
= get_remote_state ();
2444 int pid
= PIDGET (ptid
);
2445 char *buf
= NULL
, *outbuf
;
2446 struct cleanup
*old_cleanup
;
2448 buf
= xmalloc (rs
->remote_packet_size
);
2449 old_cleanup
= make_cleanup (xfree
, buf
);
2451 if (remote_protocol_vcont
.support
== PACKET_SUPPORT_UNKNOWN
)
2452 remote_vcont_probe (rs
, buf
);
2454 if (remote_protocol_vcont
.support
== PACKET_DISABLE
)
2456 do_cleanups (old_cleanup
);
2460 /* If we could generate a wider range of packets, we'd have to worry
2461 about overflowing BUF. Should there be a generic
2462 "multi-part-packet" packet? */
2464 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
)
2466 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2467 don't have any PID numbers the inferior will understand. Make sure
2468 to only send forms that do not specify a PID. */
2469 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2470 outbuf
= xstrprintf ("vCont;S%02x", siggnal
);
2472 outbuf
= xstrprintf ("vCont;s");
2473 else if (siggnal
!= TARGET_SIGNAL_0
)
2474 outbuf
= xstrprintf ("vCont;C%02x", siggnal
);
2476 outbuf
= xstrprintf ("vCont;c");
2480 /* Resume all threads, with preference for INFERIOR_PTID. */
2481 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2482 outbuf
= xstrprintf ("vCont;S%02x:%x;c", siggnal
,
2483 PIDGET (inferior_ptid
));
2485 outbuf
= xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid
));
2486 else if (siggnal
!= TARGET_SIGNAL_0
)
2487 outbuf
= xstrprintf ("vCont;C%02x:%x;c", siggnal
,
2488 PIDGET (inferior_ptid
));
2490 outbuf
= xstrprintf ("vCont;c");
2494 /* Scheduler locking; resume only PTID. */
2495 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2496 outbuf
= xstrprintf ("vCont;S%02x:%x", siggnal
, pid
);
2498 outbuf
= xstrprintf ("vCont;s:%x", pid
);
2499 else if (siggnal
!= TARGET_SIGNAL_0
)
2500 outbuf
= xstrprintf ("vCont;C%02x:%x", siggnal
, pid
);
2502 outbuf
= xstrprintf ("vCont;c:%x", pid
);
2505 gdb_assert (outbuf
&& strlen (outbuf
) < rs
->remote_packet_size
);
2506 make_cleanup (xfree
, outbuf
);
2510 do_cleanups (old_cleanup
);
2515 /* Tell the remote machine to resume. */
2517 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2519 static int last_sent_step
;
2522 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2524 struct remote_state
*rs
= get_remote_state ();
2525 char *buf
= alloca (rs
->remote_packet_size
);
2526 int pid
= PIDGET (ptid
);
2529 last_sent_signal
= siggnal
;
2530 last_sent_step
= step
;
2532 /* A hook for when we need to do something at the last moment before
2534 if (deprecated_target_resume_hook
)
2535 (*deprecated_target_resume_hook
) ();
2537 /* The vCont packet doesn't need to specify threads via Hc. */
2538 if (remote_vcont_resume (ptid
, step
, siggnal
))
2541 /* All other supported resume packets do use Hc, so call set_thread. */
2543 set_thread (0, 0); /* run any thread */
2545 set_thread (pid
, 0); /* run this thread */
2547 if (siggnal
!= TARGET_SIGNAL_0
)
2549 buf
[0] = step
? 'S' : 'C';
2550 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2551 buf
[2] = tohex (((int) siggnal
) & 0xf);
2555 strcpy (buf
, step
? "s" : "c");
2560 /* Same as remote_resume, but with async support. */
2562 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2564 remote_resume (ptid
, step
, siggnal
);
2566 /* We are about to start executing the inferior, let's register it
2567 with the event loop. NOTE: this is the one place where all the
2568 execution commands end up. We could alternatively do this in each
2569 of the execution commands in infcmd.c.*/
2570 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2571 into infcmd.c in order to allow inferior function calls to work
2572 NOT asynchronously. */
2573 if (target_can_async_p ())
2574 target_async (inferior_event_handler
, 0);
2575 /* Tell the world that the target is now executing. */
2576 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2577 this? Instead, should the client of target just assume (for
2578 async targets) that the target is going to start executing? Is
2579 this information already found in the continuation block? */
2580 if (target_is_async_p ())
2581 target_executing
= 1;
2585 /* Set up the signal handler for SIGINT, while the target is
2586 executing, ovewriting the 'regular' SIGINT signal handler. */
2588 initialize_sigint_signal_handler (void)
2590 sigint_remote_token
=
2591 create_async_signal_handler (async_remote_interrupt
, NULL
);
2592 signal (SIGINT
, handle_remote_sigint
);
2595 /* Signal handler for SIGINT, while the target is executing. */
2597 handle_remote_sigint (int sig
)
2599 signal (sig
, handle_remote_sigint_twice
);
2600 sigint_remote_twice_token
=
2601 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2602 mark_async_signal_handler_wrapper (sigint_remote_token
);
2605 /* Signal handler for SIGINT, installed after SIGINT has already been
2606 sent once. It will take effect the second time that the user sends
2609 handle_remote_sigint_twice (int sig
)
2611 signal (sig
, handle_sigint
);
2612 sigint_remote_twice_token
=
2613 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2614 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2617 /* Perform the real interruption of the target execution, in response
2620 async_remote_interrupt (gdb_client_data arg
)
2623 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2628 /* Perform interrupt, if the first attempt did not succeed. Just give
2629 up on the target alltogether. */
2631 async_remote_interrupt_twice (gdb_client_data arg
)
2634 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2635 /* Do something only if the target was not killed by the previous
2637 if (target_executing
)
2640 signal (SIGINT
, handle_remote_sigint
);
2644 /* Reinstall the usual SIGINT handlers, after the target has
2647 cleanup_sigint_signal_handler (void *dummy
)
2649 signal (SIGINT
, handle_sigint
);
2650 if (sigint_remote_twice_token
)
2651 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_twice_token
);
2652 if (sigint_remote_token
)
2653 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_token
);
2656 /* Send ^C to target to halt it. Target will respond, and send us a
2658 static void (*ofunc
) (int);
2660 /* The command line interface's stop routine. This function is installed
2661 as a signal handler for SIGINT. The first time a user requests a
2662 stop, we call remote_stop to send a break or ^C. If there is no
2663 response from the target (it didn't stop when the user requested it),
2664 we ask the user if he'd like to detach from the target. */
2666 remote_interrupt (int signo
)
2668 /* If this doesn't work, try more severe steps. */
2669 signal (signo
, remote_interrupt_twice
);
2672 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2677 /* The user typed ^C twice. */
2680 remote_interrupt_twice (int signo
)
2682 signal (signo
, ofunc
);
2684 signal (signo
, remote_interrupt
);
2687 /* This is the generic stop called via the target vector. When a target
2688 interrupt is requested, either by the command line or the GUI, we
2689 will eventually end up here. */
2693 /* Send a break or a ^C, depending on user preference. */
2695 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2698 serial_send_break (remote_desc
);
2700 serial_write (remote_desc
, "\003", 1);
2703 /* Ask the user what to do when an interrupt is received. */
2706 interrupt_query (void)
2708 target_terminal_ours ();
2710 if (query ("Interrupted while waiting for the program.\n\
2711 Give up (and stop debugging it)? "))
2713 target_mourn_inferior ();
2714 throw_exception (RETURN_QUIT
);
2717 target_terminal_inferior ();
2720 /* Enable/disable target terminal ownership. Most targets can use
2721 terminal groups to control terminal ownership. Remote targets are
2722 different in that explicit transfer of ownership to/from GDB/target
2726 remote_async_terminal_inferior (void)
2728 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2729 sync_execution here. This function should only be called when
2730 GDB is resuming the inferior in the forground. A background
2731 resume (``run&'') should leave GDB in control of the terminal and
2732 consequently should not call this code. */
2733 if (!sync_execution
)
2735 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2736 calls target_terminal_*() idenpotent. The event-loop GDB talking
2737 to an asynchronous target with a synchronous command calls this
2738 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2739 stops trying to transfer the terminal to the target when it
2740 shouldn't this guard can go away. */
2741 if (!remote_async_terminal_ours_p
)
2743 delete_file_handler (input_fd
);
2744 remote_async_terminal_ours_p
= 0;
2745 initialize_sigint_signal_handler ();
2746 /* NOTE: At this point we could also register our selves as the
2747 recipient of all input. Any characters typed could then be
2748 passed on down to the target. */
2752 remote_async_terminal_ours (void)
2754 /* See FIXME in remote_async_terminal_inferior. */
2755 if (!sync_execution
)
2757 /* See FIXME in remote_async_terminal_inferior. */
2758 if (remote_async_terminal_ours_p
)
2760 cleanup_sigint_signal_handler (NULL
);
2761 add_file_handler (input_fd
, stdin_event_handler
, 0);
2762 remote_async_terminal_ours_p
= 1;
2765 /* If nonzero, ignore the next kill. */
2770 remote_console_output (char *msg
)
2774 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
2777 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
2780 fputs_unfiltered (tb
, gdb_stdtarg
);
2782 gdb_flush (gdb_stdtarg
);
2785 /* Wait until the remote machine stops, then return,
2786 storing status in STATUS just as `wait' would.
2787 Returns "pid", which in the case of a multi-threaded
2788 remote OS, is the thread-id. */
2791 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2793 struct remote_state
*rs
= get_remote_state ();
2794 unsigned char *buf
= alloca (rs
->remote_packet_size
);
2795 ULONGEST thread_num
= -1;
2798 status
->kind
= TARGET_WAITKIND_EXITED
;
2799 status
->value
.integer
= 0;
2805 ofunc
= signal (SIGINT
, remote_interrupt
);
2806 getpkt (buf
, (rs
->remote_packet_size
), 1);
2807 signal (SIGINT
, ofunc
);
2809 /* This is a hook for when we need to do something (perhaps the
2810 collection of trace data) every time the target stops. */
2811 if (deprecated_target_wait_loop_hook
)
2812 (*deprecated_target_wait_loop_hook
) ();
2814 remote_stopped_by_watchpoint_p
= 0;
2818 case 'E': /* Error of some sort */
2819 warning ("Remote failure reply: %s", buf
);
2821 case 'F': /* File-I/O request */
2822 remote_fileio_request (buf
);
2824 case 'T': /* Status with PC, SP, FP, ... */
2827 char regs
[MAX_REGISTER_SIZE
];
2829 /* Expedited reply, containing Signal, {regno, reg} repeat */
2830 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2832 n... = register number
2833 r... = register contents
2835 p
= &buf
[3]; /* after Txx */
2844 /* If the packet contains a register number save it in pnum
2845 and set p1 to point to the character following it.
2846 Otherwise p1 points to p. */
2848 /* If this packet is an awatch packet, don't parse the 'a'
2849 as a register number. */
2851 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
2853 /* Read the ``P'' register number. */
2854 pnum
= strtol (p
, &p_temp
, 16);
2855 p1
= (unsigned char *) p_temp
;
2860 if (p1
== p
) /* No register number present here */
2862 p1
= (unsigned char *) strchr (p
, ':');
2864 warning ("Malformed packet(a) (missing colon): %s\n\
2867 if (strncmp (p
, "thread", p1
- p
) == 0)
2869 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2870 record_currthread (thread_num
);
2871 p
= (unsigned char *) p_temp
;
2873 else if ((strncmp (p
, "watch", p1
- p
) == 0)
2874 || (strncmp (p
, "rwatch", p1
- p
) == 0)
2875 || (strncmp (p
, "awatch", p1
- p
) == 0))
2877 remote_stopped_by_watchpoint_p
= 1;
2878 p
= unpack_varlen_hex (++p1
, &addr
);
2879 remote_watch_data_address
= (CORE_ADDR
)addr
;
2883 /* Silently skip unknown optional info. */
2884 p_temp
= strchr (p1
+ 1, ';');
2886 p
= (unsigned char *) p_temp
;
2891 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
2895 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
2899 error ("Remote sent bad register number %s: %s\nPacket: '%s'\n",
2900 phex_nz (pnum
, 0), p
, buf
);
2902 fieldsize
= hex2bin (p
, regs
, register_size (current_gdbarch
, reg
->regnum
));
2904 if (fieldsize
< register_size (current_gdbarch
, reg
->regnum
))
2905 warning ("Remote reply is too short: %s", buf
);
2906 regcache_raw_supply (current_regcache
, reg
->regnum
, regs
);
2910 error ("Remote register badly formatted: %s\nhere: %s", buf
, p
);
2914 case 'S': /* Old style status, just signal only */
2915 status
->kind
= TARGET_WAITKIND_STOPPED
;
2916 status
->value
.sig
= (enum target_signal
)
2917 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2921 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2922 record_currthread (thread_num
);
2925 case 'W': /* Target exited */
2927 /* The remote process exited. */
2928 status
->kind
= TARGET_WAITKIND_EXITED
;
2929 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
2933 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
2934 status
->value
.sig
= (enum target_signal
)
2935 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2939 case 'O': /* Console output */
2940 remote_console_output (buf
+ 1);
2943 if (last_sent_signal
!= TARGET_SIGNAL_0
)
2945 /* Zero length reply means that we tried 'S' or 'C' and
2946 the remote system doesn't support it. */
2947 target_terminal_ours_for_output ();
2949 ("Can't send signals to this remote system. %s not sent.\n",
2950 target_signal_to_name (last_sent_signal
));
2951 last_sent_signal
= TARGET_SIGNAL_0
;
2952 target_terminal_inferior ();
2954 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
2955 putpkt ((char *) buf
);
2958 /* else fallthrough */
2960 warning ("Invalid remote reply: %s", buf
);
2965 if (thread_num
!= -1)
2967 return pid_to_ptid (thread_num
);
2969 return inferior_ptid
;
2972 /* Async version of remote_wait. */
2974 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2976 struct remote_state
*rs
= get_remote_state ();
2977 unsigned char *buf
= alloca (rs
->remote_packet_size
);
2978 ULONGEST thread_num
= -1;
2981 status
->kind
= TARGET_WAITKIND_EXITED
;
2982 status
->value
.integer
= 0;
2984 remote_stopped_by_watchpoint_p
= 0;
2990 if (!target_is_async_p ())
2991 ofunc
= signal (SIGINT
, remote_interrupt
);
2992 /* FIXME: cagney/1999-09-27: If we're in async mode we should
2993 _never_ wait for ever -> test on target_is_async_p().
2994 However, before we do that we need to ensure that the caller
2995 knows how to take the target into/out of async mode. */
2996 getpkt (buf
, (rs
->remote_packet_size
), wait_forever_enabled_p
);
2997 if (!target_is_async_p ())
2998 signal (SIGINT
, ofunc
);
3000 /* This is a hook for when we need to do something (perhaps the
3001 collection of trace data) every time the target stops. */
3002 if (deprecated_target_wait_loop_hook
)
3003 (*deprecated_target_wait_loop_hook
) ();
3007 case 'E': /* Error of some sort */
3008 warning ("Remote failure reply: %s", buf
);
3010 case 'F': /* File-I/O request */
3011 remote_fileio_request (buf
);
3013 case 'T': /* Status with PC, SP, FP, ... */
3016 char regs
[MAX_REGISTER_SIZE
];
3018 /* Expedited reply, containing Signal, {regno, reg} repeat */
3019 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3021 n... = register number
3022 r... = register contents
3024 p
= &buf
[3]; /* after Txx */
3033 /* If the packet contains a register number, save it in pnum
3034 and set p1 to point to the character following it.
3035 Otherwise p1 points to p. */
3037 /* If this packet is an awatch packet, don't parse the 'a'
3038 as a register number. */
3040 if (!strncmp (p
, "awatch", strlen ("awatch")) != 0)
3042 /* Read the register number. */
3043 pnum
= strtol (p
, &p_temp
, 16);
3044 p1
= (unsigned char *) p_temp
;
3049 if (p1
== p
) /* No register number present here */
3051 p1
= (unsigned char *) strchr (p
, ':');
3053 error ("Malformed packet(a) (missing colon): %s\nPacket: '%s'\n",
3055 if (strncmp (p
, "thread", p1
- p
) == 0)
3057 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3058 record_currthread (thread_num
);
3059 p
= (unsigned char *) p_temp
;
3061 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3062 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3063 || (strncmp (p
, "awatch", p1
- p
) == 0))
3065 remote_stopped_by_watchpoint_p
= 1;
3066 p
= unpack_varlen_hex (++p1
, &addr
);
3067 remote_watch_data_address
= (CORE_ADDR
)addr
;
3071 /* Silently skip unknown optional info. */
3072 p_temp
= (unsigned char *) strchr (p1
+ 1, ';');
3080 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
3083 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
3087 error ("Remote sent bad register number %ld: %s\nPacket: '%s'\n",
3090 fieldsize
= hex2bin (p
, regs
, register_size (current_gdbarch
, reg
->regnum
));
3092 if (fieldsize
< register_size (current_gdbarch
, reg
->regnum
))
3093 warning ("Remote reply is too short: %s", buf
);
3094 regcache_raw_supply (current_regcache
, reg
->regnum
, regs
);
3098 error ("Remote register badly formatted: %s\nhere: %s",
3103 case 'S': /* Old style status, just signal only */
3104 status
->kind
= TARGET_WAITKIND_STOPPED
;
3105 status
->value
.sig
= (enum target_signal
)
3106 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3110 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3111 record_currthread (thread_num
);
3114 case 'W': /* Target exited */
3116 /* The remote process exited. */
3117 status
->kind
= TARGET_WAITKIND_EXITED
;
3118 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3122 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3123 status
->value
.sig
= (enum target_signal
)
3124 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3128 case 'O': /* Console output */
3129 remote_console_output (buf
+ 1);
3130 /* Return immediately to the event loop. The event loop will
3131 still be waiting on the inferior afterwards. */
3132 status
->kind
= TARGET_WAITKIND_IGNORE
;
3135 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3137 /* Zero length reply means that we tried 'S' or 'C' and
3138 the remote system doesn't support it. */
3139 target_terminal_ours_for_output ();
3141 ("Can't send signals to this remote system. %s not sent.\n",
3142 target_signal_to_name (last_sent_signal
));
3143 last_sent_signal
= TARGET_SIGNAL_0
;
3144 target_terminal_inferior ();
3146 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3147 putpkt ((char *) buf
);
3150 /* else fallthrough */
3152 warning ("Invalid remote reply: %s", buf
);
3157 if (thread_num
!= -1)
3159 return pid_to_ptid (thread_num
);
3161 return inferior_ptid
;
3164 /* Number of bytes of registers this stub implements. */
3166 static int register_bytes_found
;
3168 /* Read the remote registers into the block REGS. */
3169 /* Currently we just read all the registers, so we don't use regnum. */
3172 fetch_register_using_p (int regnum
)
3174 struct remote_state
*rs
= get_remote_state ();
3175 char *buf
= alloca (rs
->remote_packet_size
), *p
;
3176 char regp
[MAX_REGISTER_SIZE
];
3180 bin2hex((char *) ®num
, &buf
[1], sizeof(regnum
));
3182 remote_send (buf
, rs
->remote_packet_size
);
3183 if (buf
[0] != 0 && buf
[0] != 'E') {
3188 error("fetch_register_using_p: early buf termination");
3191 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3194 regcache_raw_supply (current_regcache
, regnum
, regp
);
3202 remote_fetch_registers (int regnum
)
3204 struct remote_state
*rs
= get_remote_state ();
3205 char *buf
= alloca (rs
->remote_packet_size
);
3208 char *regs
= alloca (rs
->sizeof_g_packet
);
3210 set_thread (PIDGET (inferior_ptid
), 1);
3214 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3215 gdb_assert (reg
!= NULL
);
3216 if (!reg
->in_g_packet
)
3217 internal_error (__FILE__
, __LINE__
,
3218 "Attempt to fetch a non G-packet register when this "
3219 "remote.c does not support the p-packet.");
3221 switch (remote_protocol_p
.support
)
3223 case PACKET_DISABLE
:
3226 if (fetch_register_using_p (regnum
))
3229 error ("Protocol error: p packet not recognized by stub");
3230 case PACKET_SUPPORT_UNKNOWN
:
3231 if (fetch_register_using_p (regnum
))
3233 /* The stub recognized the 'p' packet. Remember this. */
3234 remote_protocol_p
.support
= PACKET_ENABLE
;
3239 /* The stub does not support the 'P' packet. Use 'G'
3240 instead, and don't try using 'P' in the future (it
3241 will just waste our time). */
3242 remote_protocol_p
.support
= PACKET_DISABLE
;
3248 remote_send (buf
, (rs
->remote_packet_size
));
3250 /* Save the size of the packet sent to us by the target. Its used
3251 as a heuristic when determining the max size of packets that the
3252 target can safely receive. */
3253 if ((rs
->actual_register_packet_size
) == 0)
3254 (rs
->actual_register_packet_size
) = strlen (buf
);
3256 /* Unimplemented registers read as all bits zero. */
3257 memset (regs
, 0, rs
->sizeof_g_packet
);
3259 /* We can get out of synch in various cases. If the first character
3260 in the buffer is not a hex character, assume that has happened
3261 and try to fetch another packet to read. */
3262 while ((buf
[0] < '0' || buf
[0] > '9')
3263 && (buf
[0] < 'a' || buf
[0] > 'f')
3264 && buf
[0] != 'x') /* New: unavailable register value */
3267 fprintf_unfiltered (gdb_stdlog
,
3268 "Bad register packet; fetching a new packet\n");
3269 getpkt (buf
, (rs
->remote_packet_size
), 0);
3272 /* Reply describes registers byte by byte, each byte encoded as two
3273 hex characters. Suck them all up, then supply them to the
3274 register cacheing/storage mechanism. */
3277 for (i
= 0; i
< rs
->sizeof_g_packet
; i
++)
3283 warning ("Remote reply is of odd length: %s", buf
);
3284 /* Don't change register_bytes_found in this case, and don't
3285 print a second warning. */
3288 if (p
[0] == 'x' && p
[1] == 'x')
3289 regs
[i
] = 0; /* 'x' */
3291 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3295 if (i
!= register_bytes_found
)
3297 register_bytes_found
= i
;
3298 if (REGISTER_BYTES_OK_P ()
3299 && !REGISTER_BYTES_OK (i
))
3300 warning ("Remote reply is too short: %s", buf
);
3306 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3308 struct packet_reg
*r
= &rs
->regs
[i
];
3311 if (r
->offset
* 2 >= strlen (buf
))
3312 /* A short packet that didn't include the register's
3313 value, this implies that the register is zero (and
3314 not that the register is unavailable). Supply that
3316 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3317 else if (buf
[r
->offset
* 2] == 'x')
3319 gdb_assert (r
->offset
* 2 < strlen (buf
));
3320 /* The register isn't available, mark it as such (at
3321 the same time setting the value to zero). */
3322 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3323 set_register_cached (i
, -1);
3326 regcache_raw_supply (current_regcache
, r
->regnum
,
3333 /* Prepare to store registers. Since we may send them all (using a
3334 'G' request), we have to read out the ones we don't want to change
3338 remote_prepare_to_store (void)
3340 struct remote_state
*rs
= get_remote_state ();
3342 char buf
[MAX_REGISTER_SIZE
];
3344 /* Make sure the entire registers array is valid. */
3345 switch (remote_protocol_P
.support
)
3347 case PACKET_DISABLE
:
3348 case PACKET_SUPPORT_UNKNOWN
:
3349 /* Make sure all the necessary registers are cached. */
3350 for (i
= 0; i
< NUM_REGS
; i
++)
3351 if (rs
->regs
[i
].in_g_packet
)
3352 regcache_raw_read (current_regcache
, rs
->regs
[i
].regnum
, buf
);
3359 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3360 packet was not recognized. */
3363 store_register_using_P (int regnum
)
3365 struct remote_state
*rs
= get_remote_state ();
3366 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3367 /* Try storing a single register. */
3368 char *buf
= alloca (rs
->remote_packet_size
);
3369 char regp
[MAX_REGISTER_SIZE
];
3373 sprintf (buf
, "P%s=", phex_nz (reg
->pnum
, 0));
3374 p
= buf
+ strlen (buf
);
3375 regcache_raw_collect (current_regcache
, reg
->regnum
, regp
);
3376 bin2hex (regp
, p
, register_size (current_gdbarch
, reg
->regnum
));
3377 remote_send (buf
, rs
->remote_packet_size
);
3379 return buf
[0] != '\0';
3383 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
3384 of the register cache buffer. FIXME: ignores errors. */
3387 remote_store_registers (int regnum
)
3389 struct remote_state
*rs
= get_remote_state ();
3395 set_thread (PIDGET (inferior_ptid
), 1);
3399 switch (remote_protocol_P
.support
)
3401 case PACKET_DISABLE
:
3404 if (store_register_using_P (regnum
))
3407 error ("Protocol error: P packet not recognized by stub");
3408 case PACKET_SUPPORT_UNKNOWN
:
3409 if (store_register_using_P (regnum
))
3411 /* The stub recognized the 'P' packet. Remember this. */
3412 remote_protocol_P
.support
= PACKET_ENABLE
;
3417 /* The stub does not support the 'P' packet. Use 'G'
3418 instead, and don't try using 'P' in the future (it
3419 will just waste our time). */
3420 remote_protocol_P
.support
= PACKET_DISABLE
;
3426 /* Extract all the registers in the regcache copying them into a
3430 regs
= alloca (rs
->sizeof_g_packet
);
3431 memset (regs
, rs
->sizeof_g_packet
, 0);
3432 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3434 struct packet_reg
*r
= &rs
->regs
[i
];
3436 regcache_raw_collect (current_regcache
, r
->regnum
, regs
+ r
->offset
);
3440 /* Command describes registers byte by byte,
3441 each byte encoded as two hex characters. */
3442 buf
= alloca (rs
->remote_packet_size
);
3445 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3446 bin2hex (regs
, p
, register_bytes_found
);
3447 remote_send (buf
, (rs
->remote_packet_size
));
3451 /* Return the number of hex digits in num. */
3454 hexnumlen (ULONGEST num
)
3458 for (i
= 0; num
!= 0; i
++)
3464 /* Set BUF to the minimum number of hex digits representing NUM. */
3467 hexnumstr (char *buf
, ULONGEST num
)
3469 int len
= hexnumlen (num
);
3470 return hexnumnstr (buf
, num
, len
);
3474 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3477 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3483 for (i
= width
- 1; i
>= 0; i
--)
3485 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3492 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3495 remote_address_masked (CORE_ADDR addr
)
3497 if (remote_address_size
> 0
3498 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3500 /* Only create a mask when that mask can safely be constructed
3501 in a ULONGEST variable. */
3503 mask
= (mask
<< remote_address_size
) - 1;
3509 /* Determine whether the remote target supports binary downloading.
3510 This is accomplished by sending a no-op memory write of zero length
3511 to the target at the specified address. It does not suffice to send
3512 the whole packet, since many stubs strip the eighth bit and subsequently
3513 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3515 NOTE: This can still lose if the serial line is not eight-bit
3516 clean. In cases like this, the user should clear "remote
3520 check_binary_download (CORE_ADDR addr
)
3522 struct remote_state
*rs
= get_remote_state ();
3523 switch (remote_protocol_binary_download
.support
)
3525 case PACKET_DISABLE
:
3529 case PACKET_SUPPORT_UNKNOWN
:
3531 char *buf
= alloca (rs
->remote_packet_size
);
3536 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3538 p
+= hexnumstr (p
, (ULONGEST
) 0);
3542 putpkt_binary (buf
, (int) (p
- buf
));
3543 getpkt (buf
, (rs
->remote_packet_size
), 0);
3548 fprintf_unfiltered (gdb_stdlog
,
3549 "binary downloading NOT suppported by target\n");
3550 remote_protocol_binary_download
.support
= PACKET_DISABLE
;
3555 fprintf_unfiltered (gdb_stdlog
,
3556 "binary downloading suppported by target\n");
3557 remote_protocol_binary_download
.support
= PACKET_ENABLE
;
3564 /* Write memory data directly to the remote machine.
3565 This does not inform the data cache; the data cache uses this.
3566 MEMADDR is the address in the remote memory space.
3567 MYADDR is the address of the buffer in our space.
3568 LEN is the number of bytes.
3570 Returns number of bytes transferred, or 0 (setting errno) for
3571 error. Only transfer a single packet. */
3574 remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3578 unsigned char *plen
;
3584 unsigned char *payload_start
;
3586 /* Verify that the target can support a binary download. */
3587 check_binary_download (memaddr
);
3589 /* Compute the size, and then allocate space for the largest
3590 possible packet. Include space for an extra trailing NUL. */
3591 sizeof_buf
= get_memory_write_packet_size () + 1;
3592 buf
= alloca (sizeof_buf
);
3594 /* Compute the size of the actual payload by subtracting out the
3595 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
3596 payload_size
= (get_memory_write_packet_size () - (strlen ("$M,:#NN")
3597 + hexnumlen (memaddr
)
3598 + hexnumlen (len
)));
3600 /* Construct the packet header: "[MX]<memaddr>,<len>:". */
3602 /* Append "[XM]". Compute a best guess of the number of bytes
3603 actually transfered. */
3605 switch (remote_protocol_binary_download
.support
)
3609 /* Best guess at number of bytes that will fit. */
3610 todo
= min (len
, payload_size
);
3612 case PACKET_DISABLE
:
3614 /* num bytes that will fit */
3615 todo
= min (len
, payload_size
/ 2);
3617 case PACKET_SUPPORT_UNKNOWN
:
3618 internal_error (__FILE__
, __LINE__
,
3619 "remote_write_bytes: bad internal state");
3621 internal_error (__FILE__
, __LINE__
, "bad switch");
3624 /* Append "<memaddr>". */
3625 memaddr
= remote_address_masked (memaddr
);
3626 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3631 /* Append <len>. Retain the location/size of <len>. It may need to
3632 be adjusted once the packet body has been created. */
3634 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
3641 /* Append the packet body. */
3643 switch (remote_protocol_binary_download
.support
)
3646 /* Binary mode. Send target system values byte by byte, in
3647 increasing byte addresses. Only escape certain critical
3650 (nr_bytes
< todo
) && (p
- payload_start
) < payload_size
;
3653 switch (myaddr
[nr_bytes
] & 0xff)
3658 /* These must be escaped */
3660 *p
++ = (myaddr
[nr_bytes
] & 0xff) ^ 0x20;
3663 *p
++ = myaddr
[nr_bytes
] & 0xff;
3667 if (nr_bytes
< todo
)
3669 /* Escape chars have filled up the buffer prematurely,
3670 and we have actually sent fewer bytes than planned.
3671 Fix-up the length field of the packet. Use the same
3672 number of characters as before. */
3673 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
3674 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
3677 case PACKET_DISABLE
:
3678 /* Normal mode: Send target system values byte by byte, in
3679 increasing byte addresses. Each byte is encoded as a two hex
3681 nr_bytes
= bin2hex (myaddr
, p
, todo
);
3684 case PACKET_SUPPORT_UNKNOWN
:
3685 internal_error (__FILE__
, __LINE__
,
3686 "remote_write_bytes: bad internal state");
3688 internal_error (__FILE__
, __LINE__
, "bad switch");
3691 putpkt_binary (buf
, (int) (p
- buf
));
3692 getpkt (buf
, sizeof_buf
, 0);
3696 /* There is no correspondance between what the remote protocol
3697 uses for errors and errno codes. We would like a cleaner way
3698 of representing errors (big enough to include errno codes,
3699 bfd_error codes, and others). But for now just return EIO. */
3704 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3705 bytes than we'd planned. */
3709 /* Read memory data directly from the remote machine.
3710 This does not use the data cache; the data cache uses this.
3711 MEMADDR is the address in the remote memory space.
3712 MYADDR is the address of the buffer in our space.
3713 LEN is the number of bytes.
3715 Returns number of bytes transferred, or 0 for error. */
3717 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3718 remote targets) shouldn't attempt to read the entire buffer.
3719 Instead it should read a single packet worth of data and then
3720 return the byte size of that packet to the caller. The caller (its
3721 caller and its callers caller ;-) already contains code for
3722 handling partial reads. */
3725 remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3728 int max_buf_size
; /* Max size of packet output buffer */
3732 /* Create a buffer big enough for this packet. */
3733 max_buf_size
= get_memory_read_packet_size ();
3734 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3735 buf
= alloca (sizeof_buf
);
3744 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
3746 /* construct "m"<memaddr>","<len>" */
3747 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3748 memaddr
= remote_address_masked (memaddr
);
3751 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3753 p
+= hexnumstr (p
, (ULONGEST
) todo
);
3757 getpkt (buf
, sizeof_buf
, 0);
3760 && isxdigit (buf
[1]) && isxdigit (buf
[2])
3763 /* There is no correspondance between what the remote protocol uses
3764 for errors and errno codes. We would like a cleaner way of
3765 representing errors (big enough to include errno codes, bfd_error
3766 codes, and others). But for now just return EIO. */
3771 /* Reply describes memory byte by byte,
3772 each byte encoded as two hex characters. */
3775 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
3777 /* Reply is short. This means that we were able to read
3778 only part of what we wanted to. */
3779 return i
+ (origlen
- len
);
3788 /* Read or write LEN bytes from inferior memory at MEMADDR,
3789 transferring to or from debugger address BUFFER. Write to inferior if
3790 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3791 for error. TARGET is unused. */
3794 remote_xfer_memory (CORE_ADDR mem_addr
, char *buffer
, int mem_len
,
3795 int should_write
, struct mem_attrib
*attrib
,
3796 struct target_ops
*target
)
3798 CORE_ADDR targ_addr
;
3802 /* Should this be the selected frame? */
3803 gdbarch_remote_translate_xfer_address (current_gdbarch
, current_regcache
,
3805 &targ_addr
, &targ_len
);
3810 res
= remote_write_bytes (targ_addr
, buffer
, targ_len
);
3812 res
= remote_read_bytes (targ_addr
, buffer
, targ_len
);
3818 remote_files_info (struct target_ops
*ignore
)
3820 puts_filtered ("Debugging a target over a serial line.\n");
3823 /* Stuff for dealing with the packets which are part of this protocol.
3824 See comment at top of file for details. */
3826 /* Read a single character from the remote end, masking it down to 7 bits. */
3829 readchar (int timeout
)
3833 ch
= serial_readchar (remote_desc
, timeout
);
3838 switch ((enum serial_rc
) ch
)
3841 target_mourn_inferior ();
3842 error ("Remote connection closed");
3845 perror_with_name ("Remote communication error");
3847 case SERIAL_TIMEOUT
:
3853 /* Send the command in BUF to the remote machine, and read the reply
3854 into BUF. Report an error if we get an error reply. */
3857 remote_send (char *buf
,
3861 getpkt (buf
, sizeof_buf
, 0);
3864 error ("Remote failure reply: %s", buf
);
3867 /* Display a null-terminated packet on stdout, for debugging, using C
3871 print_packet (char *buf
)
3873 puts_filtered ("\"");
3874 fputstr_filtered (buf
, '"', gdb_stdout
);
3875 puts_filtered ("\"");
3881 return putpkt_binary (buf
, strlen (buf
));
3884 /* Send a packet to the remote machine, with error checking. The data
3885 of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5
3886 to account for the $, # and checksum, and for a possible /0 if we are
3887 debugging (remote_debug) and want to print the sent packet as a string */
3890 putpkt_binary (char *buf
, int cnt
)
3892 struct remote_state
*rs
= get_remote_state ();
3894 unsigned char csum
= 0;
3895 char *buf2
= alloca (cnt
+ 6);
3896 long sizeof_junkbuf
= (rs
->remote_packet_size
);
3897 char *junkbuf
= alloca (sizeof_junkbuf
);
3903 /* Copy the packet into buffer BUF2, encapsulating it
3904 and giving it a checksum. */
3909 for (i
= 0; i
< cnt
; i
++)
3915 *p
++ = tohex ((csum
>> 4) & 0xf);
3916 *p
++ = tohex (csum
& 0xf);
3918 /* Send it over and over until we get a positive ack. */
3922 int started_error_output
= 0;
3927 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
3928 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
3929 fprintf_unfiltered (gdb_stdlog
, "...");
3930 gdb_flush (gdb_stdlog
);
3932 if (serial_write (remote_desc
, buf2
, p
- buf2
))
3933 perror_with_name ("putpkt: write failed");
3935 /* read until either a timeout occurs (-2) or '+' is read */
3938 ch
= readchar (remote_timeout
);
3946 case SERIAL_TIMEOUT
:
3948 if (started_error_output
)
3950 putchar_unfiltered ('\n');
3951 started_error_output
= 0;
3960 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
3964 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
3965 case SERIAL_TIMEOUT
:
3969 break; /* Retransmit buffer */
3973 fprintf_unfiltered (gdb_stdlog
, "Packet instead of Ack, ignoring it\n");
3974 /* It's probably an old response, and we're out of sync.
3975 Just gobble up the packet and ignore it. */
3976 read_frame (junkbuf
, sizeof_junkbuf
);
3977 continue; /* Now, go look for + */
3982 if (!started_error_output
)
3984 started_error_output
= 1;
3985 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
3987 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
3991 break; /* Here to retransmit */
3995 /* This is wrong. If doing a long backtrace, the user should be
3996 able to get out next time we call QUIT, without anything as
3997 violent as interrupt_query. If we want to provide a way out of
3998 here without getting to the next QUIT, it should be based on
3999 hitting ^C twice as in remote_wait. */
4009 /* Come here after finding the start of the frame. Collect the rest
4010 into BUF, verifying the checksum, length, and handling run-length
4011 compression. No more than sizeof_buf-1 characters are read so that
4012 the buffer can be NUL terminated.
4014 Returns -1 on error, number of characters in buffer (ignoring the
4015 trailing NULL) on success. (could be extended to return one of the
4016 SERIAL status indications). */
4019 read_frame (char *buf
,
4031 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
4032 c
= readchar (remote_timeout
);
4035 case SERIAL_TIMEOUT
:
4037 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4041 fputs_filtered ("Saw new packet start in middle of old one\n",
4043 return -1; /* Start a new packet, count retries */
4046 unsigned char pktcsum
;
4052 check_0
= readchar (remote_timeout
);
4054 check_1
= readchar (remote_timeout
);
4056 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4059 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog
);
4062 else if (check_0
< 0 || check_1
< 0)
4065 fputs_filtered ("Communication error in checksum\n", gdb_stdlog
);
4069 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4070 if (csum
== pktcsum
)
4075 fprintf_filtered (gdb_stdlog
,
4076 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4078 fputs_filtered (buf
, gdb_stdlog
);
4079 fputs_filtered ("\n", gdb_stdlog
);
4081 /* Number of characters in buffer ignoring trailing
4085 case '*': /* Run length encoding */
4090 c
= readchar (remote_timeout
);
4092 repeat
= c
- ' ' + 3; /* Compute repeat count */
4094 /* The character before ``*'' is repeated. */
4096 if (repeat
> 0 && repeat
<= 255
4098 && bc
+ repeat
- 1 < sizeof_buf
- 1)
4100 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4106 printf_filtered ("Repeat count %d too large for buffer: ", repeat
);
4107 puts_filtered (buf
);
4108 puts_filtered ("\n");
4112 if (bc
< sizeof_buf
- 1)
4120 puts_filtered ("Remote packet too long: ");
4121 puts_filtered (buf
);
4122 puts_filtered ("\n");
4129 /* Read a packet from the remote machine, with error checking, and
4130 store it in BUF. If FOREVER, wait forever rather than timing out;
4131 this is used (in synchronous mode) to wait for a target that is is
4132 executing user code to stop. */
4133 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4134 don't have to change all the calls to getpkt to deal with the
4135 return value, because at the moment I don't know what the right
4136 thing to do it for those. */
4144 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4148 /* Read a packet from the remote machine, with error checking, and
4149 store it in BUF. If FOREVER, wait forever rather than timing out;
4150 this is used (in synchronous mode) to wait for a target that is is
4151 executing user code to stop. If FOREVER == 0, this function is
4152 allowed to time out gracefully and return an indication of this to
4155 getpkt_sane (char *buf
,
4164 strcpy (buf
, "timeout");
4168 timeout
= watchdog
> 0 ? watchdog
: -1;
4172 timeout
= remote_timeout
;
4176 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4178 /* This can loop forever if the remote side sends us characters
4179 continuously, but if it pauses, we'll get a zero from readchar
4180 because of timeout. Then we'll count that as a retry. */
4182 /* Note that we will only wait forever prior to the start of a packet.
4183 After that, we expect characters to arrive at a brisk pace. They
4184 should show up within remote_timeout intervals. */
4188 c
= readchar (timeout
);
4190 if (c
== SERIAL_TIMEOUT
)
4192 if (forever
) /* Watchdog went off? Kill the target. */
4195 target_mourn_inferior ();
4196 error ("Watchdog has expired. Target detached.\n");
4199 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4205 /* We've found the start of a packet, now collect the data. */
4207 val
= read_frame (buf
, sizeof_buf
);
4213 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4214 fputstr_unfiltered (buf
, 0, gdb_stdlog
);
4215 fprintf_unfiltered (gdb_stdlog
, "\n");
4217 serial_write (remote_desc
, "+", 1);
4221 /* Try the whole thing again. */
4223 serial_write (remote_desc
, "-", 1);
4226 /* We have tried hard enough, and just can't receive the packet. Give up. */
4228 printf_unfiltered ("Ignoring packet error, continuing...\n");
4229 serial_write (remote_desc
, "+", 1);
4236 /* For some mysterious reason, wait_for_inferior calls kill instead of
4237 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4241 target_mourn_inferior ();
4245 /* Use catch_errors so the user can quit from gdb even when we aren't on
4246 speaking terms with the remote system. */
4247 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4249 /* Don't wait for it to die. I'm not really sure it matters whether
4250 we do or not. For the existing stubs, kill is a noop. */
4251 target_mourn_inferior ();
4254 /* Async version of remote_kill. */
4256 remote_async_kill (void)
4258 /* Unregister the file descriptor from the event loop. */
4259 if (target_is_async_p ())
4260 serial_async (remote_desc
, NULL
, 0);
4262 /* For some mysterious reason, wait_for_inferior calls kill instead of
4263 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4267 target_mourn_inferior ();
4271 /* Use catch_errors so the user can quit from gdb even when we aren't on
4272 speaking terms with the remote system. */
4273 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4275 /* Don't wait for it to die. I'm not really sure it matters whether
4276 we do or not. For the existing stubs, kill is a noop. */
4277 target_mourn_inferior ();
4283 remote_mourn_1 (&remote_ops
);
4287 remote_async_mourn (void)
4289 remote_mourn_1 (&remote_async_ops
);
4293 extended_remote_mourn (void)
4295 /* We do _not_ want to mourn the target like this; this will
4296 remove the extended remote target from the target stack,
4297 and the next time the user says "run" it'll fail.
4299 FIXME: What is the right thing to do here? */
4301 remote_mourn_1 (&extended_remote_ops
);
4305 /* Worker function for remote_mourn. */
4307 remote_mourn_1 (struct target_ops
*target
)
4309 unpush_target (target
);
4310 generic_mourn_inferior ();
4313 /* In the extended protocol we want to be able to do things like
4314 "run" and have them basically work as expected. So we need
4315 a special create_inferior function.
4317 FIXME: One day add support for changing the exec file
4318 we're debugging, arguments and an environment. */
4321 extended_remote_create_inferior (char *exec_file
, char *args
, char **env
,
4324 /* Rip out the breakpoints; we'll reinsert them after restarting
4325 the remote server. */
4326 remove_breakpoints ();
4328 /* Now restart the remote server. */
4329 extended_remote_restart ();
4331 /* Now put the breakpoints back in. This way we're safe if the
4332 restart function works via a unix fork on the remote side. */
4333 insert_breakpoints ();
4335 /* Clean up from the last time we were running. */
4336 clear_proceed_status ();
4338 /* Let the remote process run. */
4339 proceed (-1, TARGET_SIGNAL_0
, 0);
4342 /* Async version of extended_remote_create_inferior. */
4344 extended_remote_async_create_inferior (char *exec_file
, char *args
, char **env
,
4347 /* Rip out the breakpoints; we'll reinsert them after restarting
4348 the remote server. */
4349 remove_breakpoints ();
4351 /* If running asynchronously, register the target file descriptor
4352 with the event loop. */
4353 if (target_can_async_p ())
4354 target_async (inferior_event_handler
, 0);
4356 /* Now restart the remote server. */
4357 extended_remote_restart ();
4359 /* Now put the breakpoints back in. This way we're safe if the
4360 restart function works via a unix fork on the remote side. */
4361 insert_breakpoints ();
4363 /* Clean up from the last time we were running. */
4364 clear_proceed_status ();
4366 /* Let the remote process run. */
4367 proceed (-1, TARGET_SIGNAL_0
, 0);
4371 /* On some machines, e.g. 68k, we may use a different breakpoint
4372 instruction than other targets; in those use
4373 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
4374 Also, bi-endian targets may define
4375 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
4376 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
4377 just call the standard routines that are in mem-break.c. */
4379 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
4380 target should use an identical BREAKPOINT_FROM_PC. As for native,
4381 the ARCH-OS-tdep.c code can override the default. */
4383 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
4384 #define DEPRECATED_REMOTE_BREAKPOINT
4387 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4389 /* If the target isn't bi-endian, just pretend it is. */
4390 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
4391 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4392 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4395 static unsigned char big_break_insn
[] = DEPRECATED_BIG_REMOTE_BREAKPOINT
;
4396 static unsigned char little_break_insn
[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT
;
4398 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4400 /* Insert a breakpoint on targets that don't have any better
4401 breakpoint support. We read the contents of the target location
4402 and stash it, then overwrite it with a breakpoint instruction.
4403 ADDR is the target location in the target machine. CONTENTS_CACHE
4404 is a pointer to memory allocated for saving the target contents.
4405 It is guaranteed by the caller to be long enough to save the number
4406 of bytes returned by BREAKPOINT_FROM_PC. */
4409 remote_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4411 struct remote_state
*rs
= get_remote_state ();
4412 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4417 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4418 If it succeeds, then set the support to PACKET_ENABLE. If it
4419 fails, and the user has explicitly requested the Z support then
4420 report an error, otherwise, mark it disabled and go on. */
4422 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4424 char *buf
= alloca (rs
->remote_packet_size
);
4427 addr
= remote_address_masked (addr
);
4431 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4432 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4433 sprintf (p
, ",%d", bp_size
);
4436 getpkt (buf
, (rs
->remote_packet_size
), 0);
4438 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]))
4444 case PACKET_UNKNOWN
:
4449 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4450 val
= target_read_memory (addr
, contents_cache
, sizeof big_break_insn
);
4454 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
4455 val
= target_write_memory (addr
, (char *) big_break_insn
,
4456 sizeof big_break_insn
);
4458 val
= target_write_memory (addr
, (char *) little_break_insn
,
4459 sizeof little_break_insn
);
4464 return memory_insert_breakpoint (addr
, contents_cache
);
4465 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4469 remote_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4471 struct remote_state
*rs
= get_remote_state ();
4474 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4476 char *buf
= alloca (rs
->remote_packet_size
);
4483 addr
= remote_address_masked (addr
);
4484 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4485 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4486 sprintf (p
, ",%d", bp_size
);
4489 getpkt (buf
, (rs
->remote_packet_size
), 0);
4491 return (buf
[0] == 'E');
4494 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4495 return target_write_memory (addr
, contents_cache
, sizeof big_break_insn
);
4497 return memory_remove_breakpoint (addr
, contents_cache
);
4498 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4502 watchpoint_to_Z_packet (int type
)
4516 internal_error (__FILE__
, __LINE__
,
4517 "hw_bp_to_z: bad watchpoint type %d", type
);
4522 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
4524 struct remote_state
*rs
= get_remote_state ();
4525 char *buf
= alloca (rs
->remote_packet_size
);
4527 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4529 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4530 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4531 remote_protocol_Z
[packet
].name
,
4532 remote_protocol_Z
[packet
].title
);
4534 sprintf (buf
, "Z%x,", packet
);
4535 p
= strchr (buf
, '\0');
4536 addr
= remote_address_masked (addr
);
4537 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4538 sprintf (p
, ",%x", len
);
4541 getpkt (buf
, (rs
->remote_packet_size
), 0);
4543 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4546 case PACKET_UNKNOWN
:
4551 internal_error (__FILE__
, __LINE__
,
4552 "remote_insert_watchpoint: reached end of function");
4557 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
4559 struct remote_state
*rs
= get_remote_state ();
4560 char *buf
= alloca (rs
->remote_packet_size
);
4562 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4564 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4565 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4566 remote_protocol_Z
[packet
].name
,
4567 remote_protocol_Z
[packet
].title
);
4569 sprintf (buf
, "z%x,", packet
);
4570 p
= strchr (buf
, '\0');
4571 addr
= remote_address_masked (addr
);
4572 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4573 sprintf (p
, ",%x", len
);
4575 getpkt (buf
, (rs
->remote_packet_size
), 0);
4577 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4580 case PACKET_UNKNOWN
:
4585 internal_error (__FILE__
, __LINE__
,
4586 "remote_remove_watchpoint: reached end of function");
4590 int remote_hw_watchpoint_limit
= -1;
4591 int remote_hw_breakpoint_limit
= -1;
4594 remote_check_watch_resources (int type
, int cnt
, int ot
)
4596 if (type
== bp_hardware_breakpoint
)
4598 if (remote_hw_breakpoint_limit
== 0)
4600 else if (remote_hw_breakpoint_limit
< 0)
4602 else if (cnt
<= remote_hw_breakpoint_limit
)
4607 if (remote_hw_watchpoint_limit
== 0)
4609 else if (remote_hw_watchpoint_limit
< 0)
4613 else if (cnt
<= remote_hw_watchpoint_limit
)
4620 remote_stopped_by_watchpoint (void)
4622 return remote_stopped_by_watchpoint_p
;
4625 extern int stepped_after_stopped_by_watchpoint
;
4628 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
4631 if (remote_stopped_by_watchpoint ()
4632 || stepped_after_stopped_by_watchpoint
)
4634 *addr_p
= remote_watch_data_address
;
4643 remote_insert_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4646 struct remote_state
*rs
= get_remote_state ();
4647 char *buf
= alloca (rs
->remote_packet_size
);
4650 /* The length field should be set to the size of a breakpoint
4653 BREAKPOINT_FROM_PC (&addr
, &len
);
4655 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4656 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4657 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4658 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4664 addr
= remote_address_masked (addr
);
4665 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4666 sprintf (p
, ",%x", len
);
4669 getpkt (buf
, (rs
->remote_packet_size
), 0);
4671 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4674 case PACKET_UNKNOWN
:
4679 internal_error (__FILE__
, __LINE__
,
4680 "remote_insert_hw_breakpoint: reached end of function");
4685 remote_remove_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4688 struct remote_state
*rs
= get_remote_state ();
4689 char *buf
= alloca (rs
->remote_packet_size
);
4692 /* The length field should be set to the size of a breakpoint
4695 BREAKPOINT_FROM_PC (&addr
, &len
);
4697 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4698 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4699 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4700 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4706 addr
= remote_address_masked (addr
);
4707 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4708 sprintf (p
, ",%x", len
);
4711 getpkt (buf
, (rs
->remote_packet_size
), 0);
4713 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4716 case PACKET_UNKNOWN
:
4721 internal_error (__FILE__
, __LINE__
,
4722 "remote_remove_hw_breakpoint: reached end of function");
4725 /* Some targets are only capable of doing downloads, and afterwards
4726 they switch to the remote serial protocol. This function provides
4727 a clean way to get from the download target to the remote target.
4728 It's basically just a wrapper so that we don't have to expose any
4729 of the internal workings of remote.c.
4731 Prior to calling this routine, you should shutdown the current
4732 target code, else you will get the "A program is being debugged
4733 already..." message. Usually a call to pop_target() suffices. */
4736 push_remote_target (char *name
, int from_tty
)
4738 printf_filtered ("Switching to remote protocol\n");
4739 remote_open (name
, from_tty
);
4742 /* Table used by the crc32 function to calcuate the checksum. */
4744 static unsigned long crc32_table
[256] =
4747 static unsigned long
4748 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
4750 if (!crc32_table
[1])
4752 /* Initialize the CRC table and the decoding table. */
4756 for (i
= 0; i
< 256; i
++)
4758 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
4759 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
4766 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
4772 /* compare-sections command
4774 With no arguments, compares each loadable section in the exec bfd
4775 with the same memory range on the target, and reports mismatches.
4776 Useful for verifying the image on the target against the exec file.
4777 Depends on the target understanding the new "qCRC:" request. */
4779 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4780 target method (target verify memory) and generic version of the
4781 actual command. This will allow other high-level code (especially
4782 generic_load()) to make use of this target functionality. */
4785 compare_sections_command (char *args
, int from_tty
)
4787 struct remote_state
*rs
= get_remote_state ();
4789 unsigned long host_crc
, target_crc
;
4790 extern bfd
*exec_bfd
;
4791 struct cleanup
*old_chain
;
4794 const char *sectname
;
4795 char *buf
= alloca (rs
->remote_packet_size
);
4802 error ("command cannot be used without an exec file");
4803 if (!current_target
.to_shortname
||
4804 strcmp (current_target
.to_shortname
, "remote") != 0)
4805 error ("command can only be used with remote target");
4807 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
4809 if (!(s
->flags
& SEC_LOAD
))
4810 continue; /* skip non-loadable section */
4812 size
= bfd_get_section_size (s
);
4814 continue; /* skip zero-length section */
4816 sectname
= bfd_get_section_name (exec_bfd
, s
);
4817 if (args
&& strcmp (args
, sectname
) != 0)
4818 continue; /* not the section selected by user */
4820 matched
= 1; /* do this section */
4822 /* FIXME: assumes lma can fit into long */
4823 sprintf (buf
, "qCRC:%lx,%lx", (long) lma
, (long) size
);
4826 /* be clever; compute the host_crc before waiting for target reply */
4827 sectdata
= xmalloc (size
);
4828 old_chain
= make_cleanup (xfree
, sectdata
);
4829 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
4830 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
4832 getpkt (buf
, (rs
->remote_packet_size
), 0);
4834 error ("target memory fault, section %s, range 0x%s -- 0x%s",
4835 sectname
, paddr (lma
), paddr (lma
+ size
));
4837 error ("remote target does not support this operation");
4839 for (target_crc
= 0, tmp
= &buf
[1]; *tmp
; tmp
++)
4840 target_crc
= target_crc
* 16 + fromhex (*tmp
);
4842 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4843 sectname
, paddr (lma
), paddr (lma
+ size
));
4844 if (host_crc
== target_crc
)
4845 printf_filtered ("matched.\n");
4848 printf_filtered ("MIS-MATCHED!\n");
4852 do_cleanups (old_chain
);
4855 warning ("One or more sections of the remote executable does not match\n\
4856 the loaded file\n");
4857 if (args
&& !matched
)
4858 printf_filtered ("No loaded section named '%s'.\n", args
);
4862 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
4863 const char *annex
, void *readbuf
, const void *writebuf
,
4864 ULONGEST offset
, LONGEST len
)
4866 struct remote_state
*rs
= get_remote_state ();
4868 char *buf2
= alloca (rs
->remote_packet_size
);
4869 char *p2
= &buf2
[0];
4872 /* Handle memory using remote_xfer_memory. */
4873 if (object
== TARGET_OBJECT_MEMORY
)
4878 if (writebuf
!= NULL
)
4880 void *buffer
= xmalloc (len
);
4881 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
4882 memcpy (buffer
, writebuf
, len
);
4883 xfered
= remote_xfer_memory (offset
, buffer
, len
, 1, NULL
, ops
);
4884 do_cleanups (cleanup
);
4887 xfered
= remote_xfer_memory (offset
, readbuf
, len
, 0, NULL
, ops
);
4891 else if (xfered
== 0 && errno
== 0)
4897 /* Only handle reads. */
4898 if (writebuf
!= NULL
|| readbuf
== NULL
)
4901 /* Map pre-existing objects onto letters. DO NOT do this for new
4902 objects!!! Instead specify new query packets. */
4905 case TARGET_OBJECT_KOD
:
4908 case TARGET_OBJECT_AVR
:
4912 case TARGET_OBJECT_AUXV
:
4913 if (remote_protocol_qPart_auxv
.support
!= PACKET_DISABLE
)
4915 unsigned int total
= 0;
4918 LONGEST n
= min ((rs
->remote_packet_size
- 2) / 2, len
);
4919 snprintf (buf2
, rs
->remote_packet_size
,
4920 "qPart:auxv:read::%s,%s",
4921 phex_nz (offset
, sizeof offset
),
4922 phex_nz (n
, sizeof n
));
4925 return total
> 0 ? total
: i
;
4927 getpkt (buf2
, rs
->remote_packet_size
, 0);
4928 if (packet_ok (buf2
, &remote_protocol_qPart_auxv
) != PACKET_OK
)
4929 return total
> 0 ? total
: -1;
4930 if (buf2
[0] == 'O' && buf2
[1] == 'K' && buf2
[2] == '\0')
4931 break; /* Got EOF indicator. */
4932 /* Got some data. */
4933 i
= hex2bin (buf2
, readbuf
, len
);
4936 readbuf
= (void *) ((char *) readbuf
+ i
);
4950 /* Note: a zero OFFSET and LEN can be used to query the minimum
4952 if (offset
== 0 && len
== 0)
4953 return (rs
->remote_packet_size
);
4954 /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is
4955 not large enough let the caller. */
4956 if (len
< (rs
->remote_packet_size
))
4958 len
= rs
->remote_packet_size
;
4960 /* except for querying the minimum buffer size, target must be open */
4962 error ("remote query is only available after target open");
4964 gdb_assert (annex
!= NULL
);
4965 gdb_assert (readbuf
!= NULL
);
4970 /* we used one buffer char for the remote protocol q command and another
4971 for the query type. As the remote protocol encapsulation uses 4 chars
4972 plus one extra in case we are debugging (remote_debug),
4973 we have PBUFZIZ - 7 left to pack the query string */
4975 while (annex
[i
] && (i
< ((rs
->remote_packet_size
) - 8)))
4977 /* Bad caller may have sent forbidden characters. */
4978 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
4983 gdb_assert (annex
[i
] == '\0');
4989 getpkt (readbuf
, len
, 0);
4991 return strlen (readbuf
);
4995 remote_rcmd (char *command
,
4996 struct ui_file
*outbuf
)
4998 struct remote_state
*rs
= get_remote_state ();
5000 char *buf
= alloca (rs
->remote_packet_size
);
5004 error ("remote rcmd is only available after target open");
5006 /* Send a NULL command across as an empty command */
5007 if (command
== NULL
)
5010 /* The query prefix */
5011 strcpy (buf
, "qRcmd,");
5012 p
= strchr (buf
, '\0');
5014 if ((strlen (buf
) + strlen (command
) * 2 + 8/*misc*/) > (rs
->remote_packet_size
))
5015 error ("\"monitor\" command ``%s'' is too long\n", command
);
5017 /* Encode the actual command */
5018 bin2hex (command
, p
, 0);
5020 if (putpkt (buf
) < 0)
5021 error ("Communication problem with target\n");
5023 /* get/display the response */
5026 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
5028 getpkt (buf
, (rs
->remote_packet_size
), 0);
5030 error ("Target does not support this command\n");
5031 if (buf
[0] == 'O' && buf
[1] != 'K')
5033 remote_console_output (buf
+ 1); /* 'O' message from stub */
5036 if (strcmp (buf
, "OK") == 0)
5038 if (strlen (buf
) == 3 && buf
[0] == 'E'
5039 && isdigit (buf
[1]) && isdigit (buf
[2]))
5041 error ("Protocol error with Rcmd");
5043 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
5045 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
5046 fputc_unfiltered (c
, outbuf
);
5053 packet_command (char *args
, int from_tty
)
5055 struct remote_state
*rs
= get_remote_state ();
5056 char *buf
= alloca (rs
->remote_packet_size
);
5059 error ("command can only be used with remote target");
5062 error ("remote-packet command requires packet text as argument");
5064 puts_filtered ("sending: ");
5065 print_packet (args
);
5066 puts_filtered ("\n");
5069 getpkt (buf
, (rs
->remote_packet_size
), 0);
5070 puts_filtered ("received: ");
5072 puts_filtered ("\n");
5076 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
5078 static void display_thread_info (struct gdb_ext_thread_info
*info
);
5080 static void threadset_test_cmd (char *cmd
, int tty
);
5082 static void threadalive_test (char *cmd
, int tty
);
5084 static void threadlist_test_cmd (char *cmd
, int tty
);
5086 int get_and_display_threadinfo (threadref
* ref
);
5088 static void threadinfo_test_cmd (char *cmd
, int tty
);
5090 static int thread_display_step (threadref
* ref
, void *context
);
5092 static void threadlist_update_test_cmd (char *cmd
, int tty
);
5094 static void init_remote_threadtests (void);
5096 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
5099 threadset_test_cmd (char *cmd
, int tty
)
5101 int sample_thread
= SAMPLE_THREAD
;
5103 printf_filtered ("Remote threadset test\n");
5104 set_thread (sample_thread
, 1);
5109 threadalive_test (char *cmd
, int tty
)
5111 int sample_thread
= SAMPLE_THREAD
;
5113 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5114 printf_filtered ("PASS: Thread alive test\n");
5116 printf_filtered ("FAIL: Thread alive test\n");
5119 void output_threadid (char *title
, threadref
* ref
);
5122 output_threadid (char *title
, threadref
*ref
)
5126 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex */
5128 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5132 threadlist_test_cmd (char *cmd
, int tty
)
5135 threadref nextthread
;
5136 int done
, result_count
;
5137 threadref threadlist
[3];
5139 printf_filtered ("Remote Threadlist test\n");
5140 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5141 &result_count
, &threadlist
[0]))
5142 printf_filtered ("FAIL: threadlist test\n");
5145 threadref
*scan
= threadlist
;
5146 threadref
*limit
= scan
+ result_count
;
5148 while (scan
< limit
)
5149 output_threadid (" thread ", scan
++);
5154 display_thread_info (struct gdb_ext_thread_info
*info
)
5156 output_threadid ("Threadid: ", &info
->threadid
);
5157 printf_filtered ("Name: %s\n ", info
->shortname
);
5158 printf_filtered ("State: %s\n", info
->display
);
5159 printf_filtered ("other: %s\n\n", info
->more_display
);
5163 get_and_display_threadinfo (threadref
*ref
)
5167 struct gdb_ext_thread_info threadinfo
;
5169 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5170 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5171 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5172 display_thread_info (&threadinfo
);
5177 threadinfo_test_cmd (char *cmd
, int tty
)
5179 int athread
= SAMPLE_THREAD
;
5183 int_to_threadref (&thread
, athread
);
5184 printf_filtered ("Remote Threadinfo test\n");
5185 if (!get_and_display_threadinfo (&thread
))
5186 printf_filtered ("FAIL cannot get thread info\n");
5190 thread_display_step (threadref
*ref
, void *context
)
5192 /* output_threadid(" threadstep ",ref); *//* simple test */
5193 return get_and_display_threadinfo (ref
);
5197 threadlist_update_test_cmd (char *cmd
, int tty
)
5199 printf_filtered ("Remote Threadlist update test\n");
5200 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5204 init_remote_threadtests (void)
5206 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
5207 "Fetch and print the remote list of thread identifiers, one pkt only");
5208 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5209 "Fetch and display info about one thread");
5210 add_com ("tset", class_obscure
, threadset_test_cmd
,
5211 "Test setting to a different thread");
5212 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5213 "Iterate through updating all remote thread info");
5214 add_com ("talive", class_obscure
, threadalive_test
,
5215 " Remote thread alive test ");
5220 /* Convert a thread ID to a string. Returns the string in a static
5224 remote_pid_to_str (ptid_t ptid
)
5226 static char buf
[30];
5228 sprintf (buf
, "Thread %d", PIDGET (ptid
));
5233 init_remote_ops (void)
5235 remote_ops
.to_shortname
= "remote";
5236 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
5238 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5239 Specify the serial device it is connected to\n\
5240 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5241 remote_ops
.to_open
= remote_open
;
5242 remote_ops
.to_close
= remote_close
;
5243 remote_ops
.to_detach
= remote_detach
;
5244 remote_ops
.to_disconnect
= remote_disconnect
;
5245 remote_ops
.to_resume
= remote_resume
;
5246 remote_ops
.to_wait
= remote_wait
;
5247 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
5248 remote_ops
.to_store_registers
= remote_store_registers
;
5249 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5250 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
5251 remote_ops
.to_files_info
= remote_files_info
;
5252 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5253 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5254 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5255 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5256 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5257 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5258 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5259 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5260 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5261 remote_ops
.to_kill
= remote_kill
;
5262 remote_ops
.to_load
= generic_load
;
5263 remote_ops
.to_mourn_inferior
= remote_mourn
;
5264 remote_ops
.to_thread_alive
= remote_thread_alive
;
5265 remote_ops
.to_find_new_threads
= remote_threads_info
;
5266 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
5267 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5268 remote_ops
.to_stop
= remote_stop
;
5269 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
5270 remote_ops
.to_rcmd
= remote_rcmd
;
5271 remote_ops
.to_stratum
= process_stratum
;
5272 remote_ops
.to_has_all_memory
= 1;
5273 remote_ops
.to_has_memory
= 1;
5274 remote_ops
.to_has_stack
= 1;
5275 remote_ops
.to_has_registers
= 1;
5276 remote_ops
.to_has_execution
= 1;
5277 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5278 remote_ops
.to_magic
= OPS_MAGIC
;
5281 /* Set up the extended remote vector by making a copy of the standard
5282 remote vector and adding to it. */
5285 init_extended_remote_ops (void)
5287 extended_remote_ops
= remote_ops
;
5289 extended_remote_ops
.to_shortname
= "extended-remote";
5290 extended_remote_ops
.to_longname
=
5291 "Extended remote serial target in gdb-specific protocol";
5292 extended_remote_ops
.to_doc
=
5293 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5294 Specify the serial device it is connected to (e.g. /dev/ttya).",
5295 extended_remote_ops
.to_open
= extended_remote_open
;
5296 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
5297 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5301 remote_can_async_p (void)
5303 /* We're async whenever the serial device is. */
5304 return (current_target
.to_async_mask_value
) && serial_can_async_p (remote_desc
);
5308 remote_is_async_p (void)
5310 /* We're async whenever the serial device is. */
5311 return (current_target
.to_async_mask_value
) && serial_is_async_p (remote_desc
);
5314 /* Pass the SERIAL event on and up to the client. One day this code
5315 will be able to delay notifying the client of an event until the
5316 point where an entire packet has been received. */
5318 static void (*async_client_callback
) (enum inferior_event_type event_type
, void *context
);
5319 static void *async_client_context
;
5320 static serial_event_ftype remote_async_serial_handler
;
5323 remote_async_serial_handler (struct serial
*scb
, void *context
)
5325 /* Don't propogate error information up to the client. Instead let
5326 the client find out about the error by querying the target. */
5327 async_client_callback (INF_REG_EVENT
, async_client_context
);
5331 remote_async (void (*callback
) (enum inferior_event_type event_type
, void *context
), void *context
)
5333 if (current_target
.to_async_mask_value
== 0)
5334 internal_error (__FILE__
, __LINE__
,
5335 "Calling remote_async when async is masked");
5337 if (callback
!= NULL
)
5339 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
5340 async_client_callback
= callback
;
5341 async_client_context
= context
;
5344 serial_async (remote_desc
, NULL
, NULL
);
5347 /* Target async and target extended-async.
5349 This are temporary targets, until it is all tested. Eventually
5350 async support will be incorporated int the usual 'remote'
5354 init_remote_async_ops (void)
5356 remote_async_ops
.to_shortname
= "async";
5357 remote_async_ops
.to_longname
= "Remote serial target in async version of the gdb-specific protocol";
5358 remote_async_ops
.to_doc
=
5359 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5360 Specify the serial device it is connected to (e.g. /dev/ttya).";
5361 remote_async_ops
.to_open
= remote_async_open
;
5362 remote_async_ops
.to_close
= remote_close
;
5363 remote_async_ops
.to_detach
= remote_detach
;
5364 remote_async_ops
.to_disconnect
= remote_disconnect
;
5365 remote_async_ops
.to_resume
= remote_async_resume
;
5366 remote_async_ops
.to_wait
= remote_async_wait
;
5367 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
5368 remote_async_ops
.to_store_registers
= remote_store_registers
;
5369 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5370 remote_async_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
5371 remote_async_ops
.to_files_info
= remote_files_info
;
5372 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5373 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5374 remote_async_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5375 remote_async_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5376 remote_async_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5377 remote_async_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5378 remote_async_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5379 remote_async_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5380 remote_async_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5381 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
5382 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
5383 remote_async_ops
.to_kill
= remote_async_kill
;
5384 remote_async_ops
.to_load
= generic_load
;
5385 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
5386 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
5387 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
5388 remote_async_ops
.to_pid_to_str
= remote_pid_to_str
;
5389 remote_async_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5390 remote_async_ops
.to_stop
= remote_stop
;
5391 remote_async_ops
.to_xfer_partial
= remote_xfer_partial
;
5392 remote_async_ops
.to_rcmd
= remote_rcmd
;
5393 remote_async_ops
.to_stratum
= process_stratum
;
5394 remote_async_ops
.to_has_all_memory
= 1;
5395 remote_async_ops
.to_has_memory
= 1;
5396 remote_async_ops
.to_has_stack
= 1;
5397 remote_async_ops
.to_has_registers
= 1;
5398 remote_async_ops
.to_has_execution
= 1;
5399 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5400 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
5401 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
5402 remote_async_ops
.to_async
= remote_async
;
5403 remote_async_ops
.to_async_mask_value
= 1;
5404 remote_async_ops
.to_magic
= OPS_MAGIC
;
5407 /* Set up the async extended remote vector by making a copy of the standard
5408 remote vector and adding to it. */
5411 init_extended_async_remote_ops (void)
5413 extended_async_remote_ops
= remote_async_ops
;
5415 extended_async_remote_ops
.to_shortname
= "extended-async";
5416 extended_async_remote_ops
.to_longname
=
5417 "Extended remote serial target in async gdb-specific protocol";
5418 extended_async_remote_ops
.to_doc
=
5419 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5420 Specify the serial device it is connected to (e.g. /dev/ttya).",
5421 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
5422 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
5423 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5427 set_remote_cmd (char *args
, int from_tty
)
5432 show_remote_cmd (char *args
, int from_tty
)
5434 /* FIXME: cagney/2002-06-15: This function should iterate over
5435 remote_show_cmdlist for a list of sub commands to show. */
5436 show_remote_protocol_Z_packet_cmd (args
, from_tty
, NULL
);
5437 show_remote_protocol_P_packet_cmd (args
, from_tty
, NULL
);
5438 show_remote_protocol_p_packet_cmd (args
, from_tty
, NULL
);
5439 show_remote_protocol_qSymbol_packet_cmd (args
, from_tty
, NULL
);
5440 show_remote_protocol_vcont_packet_cmd (args
, from_tty
, NULL
);
5441 show_remote_protocol_binary_download_cmd (args
, from_tty
, NULL
);
5442 show_remote_protocol_qPart_auxv_packet_cmd (args
, from_tty
, NULL
);
5446 build_remote_gdbarch_data (void)
5448 remote_address_size
= TARGET_ADDR_BIT
;
5451 /* Saved pointer to previous owner of the new_objfile event. */
5452 static void (*remote_new_objfile_chain
) (struct objfile
*);
5454 /* Function to be called whenever a new objfile (shlib) is detected. */
5456 remote_new_objfile (struct objfile
*objfile
)
5458 if (remote_desc
!= 0) /* Have a remote connection */
5460 remote_check_symbols (objfile
);
5462 /* Call predecessor on chain, if any. */
5463 if (remote_new_objfile_chain
!= 0 &&
5465 remote_new_objfile_chain (objfile
);
5469 _initialize_remote (void)
5471 static struct cmd_list_element
*remote_set_cmdlist
;
5472 static struct cmd_list_element
*remote_show_cmdlist
;
5473 struct cmd_list_element
*tmpcmd
;
5475 /* architecture specific data */
5476 remote_gdbarch_data_handle
= gdbarch_data_register_post_init (init_remote_state
);
5478 /* Old tacky stuff. NOTE: This comes after the remote protocol so
5479 that the remote protocol has been initialized. */
5480 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size
);
5481 deprecated_register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
5484 add_target (&remote_ops
);
5486 init_extended_remote_ops ();
5487 add_target (&extended_remote_ops
);
5489 init_remote_async_ops ();
5490 add_target (&remote_async_ops
);
5492 init_extended_async_remote_ops ();
5493 add_target (&extended_async_remote_ops
);
5495 /* Hook into new objfile notification. */
5496 remote_new_objfile_chain
= deprecated_target_new_objfile_hook
;
5497 deprecated_target_new_objfile_hook
= remote_new_objfile
;
5500 init_remote_threadtests ();
5503 /* set/show remote ... */
5505 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, "\
5506 Remote protocol specific variables\n\
5507 Configure various remote-protocol specific variables such as\n\
5508 the packets being used",
5509 &remote_set_cmdlist
, "set remote ",
5510 0/*allow-unknown*/, &setlist
);
5511 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, "\
5512 Remote protocol specific variables\n\
5513 Configure various remote-protocol specific variables such as\n\
5514 the packets being used",
5515 &remote_show_cmdlist
, "show remote ",
5516 0/*allow-unknown*/, &showlist
);
5518 add_cmd ("compare-sections", class_obscure
, compare_sections_command
,
5519 "Compare section data on target to the exec file.\n\
5520 Argument is a single section name (default: all loaded sections).",
5523 add_cmd ("packet", class_maintenance
, packet_command
,
5524 "Send an arbitrary packet to a remote target.\n\
5525 maintenance packet TEXT\n\
5526 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5527 this command sends the string TEXT to the inferior, and displays the\n\
5528 response packet. GDB supplies the initial `$' character, and the\n\
5529 terminating `#' character and checksum.",
5532 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, "\
5533 Set whether to send break if interrupted.", "\
5534 Show whether to send break if interrupted.", "\
5535 If set, a break, instead of a cntrl-c, is sent to the remote target.", "\
5536 Whether to send break if interrupted is %s.",
5538 &setlist
, &showlist
);
5540 /* Install commands for configuring memory read/write packets. */
5542 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
,
5543 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5545 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
,
5546 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5548 add_cmd ("memory-write-packet-size", no_class
,
5549 set_memory_write_packet_size
,
5550 "Set the maximum number of bytes per memory-write packet.\n"
5551 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5552 "default packet size. The actual limit is further reduced\n"
5553 "dependent on the target. Specify ``fixed'' to disable the\n"
5554 "further restriction and ``limit'' to enable that restriction\n",
5555 &remote_set_cmdlist
);
5556 add_cmd ("memory-read-packet-size", no_class
,
5557 set_memory_read_packet_size
,
5558 "Set the maximum number of bytes per memory-read packet.\n"
5559 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5560 "default packet size. The actual limit is further reduced\n"
5561 "dependent on the target. Specify ``fixed'' to disable the\n"
5562 "further restriction and ``limit'' to enable that restriction\n",
5563 &remote_set_cmdlist
);
5564 add_cmd ("memory-write-packet-size", no_class
,
5565 show_memory_write_packet_size
,
5566 "Show the maximum number of bytes per memory-write packet.\n",
5567 &remote_show_cmdlist
);
5568 add_cmd ("memory-read-packet-size", no_class
,
5569 show_memory_read_packet_size
,
5570 "Show the maximum number of bytes per memory-read packet.\n",
5571 &remote_show_cmdlist
);
5573 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
5574 &remote_hw_watchpoint_limit
, "\
5575 Set the maximum number of target hardware watchpoints.", "\
5576 Show the maximum number of target hardware watchpoints.", "\
5577 Specify a negative limit for unlimited.", "\
5578 The maximum number of target hardware watchpoints is %s.",
5580 &remote_set_cmdlist
, &remote_show_cmdlist
);
5581 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
5582 &remote_hw_breakpoint_limit
, "\
5583 Set the maximum number of target hardware breakpoints.", "\
5584 Show the maximum number of target hardware breakpoints.", "\
5585 Specify a negative limit for unlimited.", "\
5586 The maximum number of target hardware breakpoints is %s.",
5588 &remote_set_cmdlist
, &remote_show_cmdlist
);
5590 deprecated_add_show_from_set
5591 (add_set_cmd ("remoteaddresssize", class_obscure
,
5592 var_integer
, (char *) &remote_address_size
,
5593 "Set the maximum size of the address (in bits) \
5594 in a memory packet.\n",
5598 add_packet_config_cmd (&remote_protocol_binary_download
,
5599 "X", "binary-download",
5600 set_remote_protocol_binary_download_cmd
,
5601 show_remote_protocol_binary_download_cmd
,
5602 &remote_set_cmdlist
, &remote_show_cmdlist
,
5605 /* XXXX - should ``set remotebinarydownload'' be retained for
5607 deprecated_add_show_from_set
5608 (add_set_cmd ("remotebinarydownload", no_class
,
5609 var_boolean
, (char *) &remote_binary_download
,
5610 "Set binary downloads.\n", &setlist
),
5614 add_packet_config_cmd (&remote_protocol_vcont
,
5615 "vCont", "verbose-resume",
5616 set_remote_protocol_vcont_packet_cmd
,
5617 show_remote_protocol_vcont_packet_cmd
,
5618 &remote_set_cmdlist
, &remote_show_cmdlist
,
5621 add_packet_config_cmd (&remote_protocol_qSymbol
,
5622 "qSymbol", "symbol-lookup",
5623 set_remote_protocol_qSymbol_packet_cmd
,
5624 show_remote_protocol_qSymbol_packet_cmd
,
5625 &remote_set_cmdlist
, &remote_show_cmdlist
,
5628 add_packet_config_cmd (&remote_protocol_P
,
5629 "P", "set-register",
5630 set_remote_protocol_P_packet_cmd
,
5631 show_remote_protocol_P_packet_cmd
,
5632 &remote_set_cmdlist
, &remote_show_cmdlist
,
5635 add_packet_config_cmd (&remote_protocol_p
,
5636 "p", "fetch-register",
5637 set_remote_protocol_p_packet_cmd
,
5638 show_remote_protocol_p_packet_cmd
,
5639 &remote_set_cmdlist
, &remote_show_cmdlist
,
5642 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
],
5643 "Z0", "software-breakpoint",
5644 set_remote_protocol_Z_software_bp_packet_cmd
,
5645 show_remote_protocol_Z_software_bp_packet_cmd
,
5646 &remote_set_cmdlist
, &remote_show_cmdlist
,
5649 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
],
5650 "Z1", "hardware-breakpoint",
5651 set_remote_protocol_Z_hardware_bp_packet_cmd
,
5652 show_remote_protocol_Z_hardware_bp_packet_cmd
,
5653 &remote_set_cmdlist
, &remote_show_cmdlist
,
5656 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
],
5657 "Z2", "write-watchpoint",
5658 set_remote_protocol_Z_write_wp_packet_cmd
,
5659 show_remote_protocol_Z_write_wp_packet_cmd
,
5660 &remote_set_cmdlist
, &remote_show_cmdlist
,
5663 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
],
5664 "Z3", "read-watchpoint",
5665 set_remote_protocol_Z_read_wp_packet_cmd
,
5666 show_remote_protocol_Z_read_wp_packet_cmd
,
5667 &remote_set_cmdlist
, &remote_show_cmdlist
,
5670 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
],
5671 "Z4", "access-watchpoint",
5672 set_remote_protocol_Z_access_wp_packet_cmd
,
5673 show_remote_protocol_Z_access_wp_packet_cmd
,
5674 &remote_set_cmdlist
, &remote_show_cmdlist
,
5677 add_packet_config_cmd (&remote_protocol_qPart_auxv
,
5678 "qPart_auxv", "read-aux-vector",
5679 set_remote_protocol_qPart_auxv_packet_cmd
,
5680 show_remote_protocol_qPart_auxv_packet_cmd
,
5681 &remote_set_cmdlist
, &remote_show_cmdlist
,
5684 /* Keep the old ``set remote Z-packet ...'' working. */
5685 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
5686 &remote_Z_packet_detect
, "\
5687 Set use of remote protocol `Z' packets", "\
5688 Show use of remote protocol `Z' packets ", "\
5689 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
5691 Use of remote protocol `Z' packets is %s",
5692 set_remote_protocol_Z_packet_cmd
,
5693 show_remote_protocol_Z_packet_cmd
,
5694 &remote_set_cmdlist
, &remote_show_cmdlist
);
5696 /* Eventually initialize fileio. See fileio.c */
5697 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);