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 /* Use strtoul here, so we'll correctly parse values whose highest
1739 bit is set. The protocol carries them as a simple series of
1740 hex digits; in the absence of a sign, strtol will see such
1741 values as positive numbers out of range for signed 'long', and
1742 return LONG_MAX to indicate an overflow. */
1743 return pid_to_ptid (strtoul (&buf
[2], NULL
, 16));
1748 /* Find new threads for info threads command.
1749 * Original version, using John Metzler's thread protocol.
1753 remote_find_new_threads (void)
1755 remote_threadlist_iterator (remote_newthread_step
, 0,
1757 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
) /* ack ack ack */
1758 inferior_ptid
= remote_current_thread (inferior_ptid
);
1762 * Find all threads for info threads command.
1763 * Uses new thread protocol contributed by Cisco.
1764 * Falls back and attempts to use the older method (above)
1765 * if the target doesn't respond to the new method.
1769 remote_threads_info (void)
1771 struct remote_state
*rs
= get_remote_state ();
1772 char *buf
= alloca (rs
->remote_packet_size
);
1776 if (remote_desc
== 0) /* paranoia */
1777 error ("Command can only be used when connected to the remote target.");
1779 if (use_threadinfo_query
)
1781 putpkt ("qfThreadInfo");
1783 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1784 if (bufp
[0] != '\0') /* q packet recognized */
1786 while (*bufp
++ == 'm') /* reply contains one or more TID */
1790 /* Use strtoul here, so we'll correctly parse values
1791 whose highest bit is set. The protocol carries
1792 them as a simple series of hex digits; in the
1793 absence of a sign, strtol will see such values as
1794 positive numbers out of range for signed 'long',
1795 and return LONG_MAX to indicate an overflow. */
1796 tid
= strtoul (bufp
, &bufp
, 16);
1797 if (tid
!= 0 && !in_thread_list (pid_to_ptid (tid
)))
1798 add_thread (pid_to_ptid (tid
));
1800 while (*bufp
++ == ','); /* comma-separated list */
1801 putpkt ("qsThreadInfo");
1803 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1809 /* Else fall back to old method based on jmetzler protocol. */
1810 use_threadinfo_query
= 0;
1811 remote_find_new_threads ();
1816 * Collect a descriptive string about the given thread.
1817 * The target may say anything it wants to about the thread
1818 * (typically info about its blocked / runnable state, name, etc.).
1819 * This string will appear in the info threads display.
1821 * Optional: targets are not required to implement this function.
1825 remote_threads_extra_info (struct thread_info
*tp
)
1827 struct remote_state
*rs
= get_remote_state ();
1831 struct gdb_ext_thread_info threadinfo
;
1832 static char display_buf
[100]; /* arbitrary... */
1833 char *bufp
= alloca (rs
->remote_packet_size
);
1834 int n
= 0; /* position in display_buf */
1836 if (remote_desc
== 0) /* paranoia */
1837 internal_error (__FILE__
, __LINE__
,
1838 "remote_threads_extra_info");
1840 if (use_threadextra_query
)
1842 sprintf (bufp
, "qThreadExtraInfo,%x", PIDGET (tp
->ptid
));
1844 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1847 n
= min (strlen (bufp
) / 2, sizeof (display_buf
));
1848 result
= hex2bin (bufp
, display_buf
, n
);
1849 display_buf
[result
] = '\0';
1854 /* If the above query fails, fall back to the old method. */
1855 use_threadextra_query
= 0;
1856 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1857 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1858 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1859 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1860 if (threadinfo
.active
)
1862 if (*threadinfo
.shortname
)
1863 n
+= sprintf(&display_buf
[0], " Name: %s,", threadinfo
.shortname
);
1864 if (*threadinfo
.display
)
1865 n
+= sprintf(&display_buf
[n
], " State: %s,", threadinfo
.display
);
1866 if (*threadinfo
.more_display
)
1867 n
+= sprintf(&display_buf
[n
], " Priority: %s",
1868 threadinfo
.more_display
);
1872 /* for purely cosmetic reasons, clear up trailing commas */
1873 if (',' == display_buf
[n
-1])
1874 display_buf
[n
-1] = ' ';
1883 /* Restart the remote side; this is an extended protocol operation. */
1886 extended_remote_restart (void)
1888 struct remote_state
*rs
= get_remote_state ();
1889 char *buf
= alloca (rs
->remote_packet_size
);
1891 /* Send the restart command; for reasons I don't understand the
1892 remote side really expects a number after the "R". */
1894 sprintf (&buf
[1], "%x", 0);
1897 /* Now query for status so this looks just like we restarted
1898 gdbserver from scratch. */
1900 getpkt (buf
, (rs
->remote_packet_size
), 0);
1903 /* Clean up connection to a remote debugger. */
1906 remote_close (int quitting
)
1909 serial_close (remote_desc
);
1913 /* Query the remote side for the text, data and bss offsets. */
1918 struct remote_state
*rs
= get_remote_state ();
1919 char *buf
= alloca (rs
->remote_packet_size
);
1922 CORE_ADDR text_addr
, data_addr
, bss_addr
;
1923 struct section_offsets
*offs
;
1925 putpkt ("qOffsets");
1927 getpkt (buf
, (rs
->remote_packet_size
), 0);
1929 if (buf
[0] == '\000')
1930 return; /* Return silently. Stub doesn't support
1934 warning ("Remote failure reply: %s", buf
);
1938 /* Pick up each field in turn. This used to be done with scanf, but
1939 scanf will make trouble if CORE_ADDR size doesn't match
1940 conversion directives correctly. The following code will work
1941 with any size of CORE_ADDR. */
1942 text_addr
= data_addr
= bss_addr
= 0;
1946 if (strncmp (ptr
, "Text=", 5) == 0)
1949 /* Don't use strtol, could lose on big values. */
1950 while (*ptr
&& *ptr
!= ';')
1951 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
1956 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
1959 while (*ptr
&& *ptr
!= ';')
1960 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
1965 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
1968 while (*ptr
&& *ptr
!= ';')
1969 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
1975 error ("Malformed response to offset query, %s", buf
);
1977 if (symfile_objfile
== NULL
)
1980 offs
= ((struct section_offsets
*)
1981 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
1982 memcpy (offs
, symfile_objfile
->section_offsets
,
1983 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
1985 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
1987 /* This is a temporary kludge to force data and bss to use the same offsets
1988 because that's what nlmconv does now. The real solution requires changes
1989 to the stub and remote.c that I don't have time to do right now. */
1991 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
1992 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
1994 objfile_relocate (symfile_objfile
, offs
);
1997 /* Stub for catch_errors. */
2000 remote_start_remote_dummy (struct ui_out
*uiout
, void *dummy
)
2002 start_remote (); /* Initialize gdb process mechanisms */
2003 /* NOTE: Return something >=0. A -ve value is reserved for
2004 catch_exceptions. */
2009 remote_start_remote (struct ui_out
*uiout
, void *dummy
)
2011 immediate_quit
++; /* Allow user to interrupt it */
2013 /* Ack any packet which the remote side has already sent. */
2014 serial_write (remote_desc
, "+", 1);
2016 /* Let the stub know that we want it to return the thread. */
2019 inferior_ptid
= remote_current_thread (inferior_ptid
);
2021 get_offsets (); /* Get text, data & bss offsets */
2023 putpkt ("?"); /* initiate a query from remote machine */
2026 /* NOTE: See comment above in remote_start_remote_dummy(). This
2027 function returns something >=0. */
2028 return remote_start_remote_dummy (uiout
, dummy
);
2031 /* Open a connection to a remote debugger.
2032 NAME is the filename used for communication. */
2035 remote_open (char *name
, int from_tty
)
2037 remote_open_1 (name
, from_tty
, &remote_ops
, 0, 0);
2040 /* Just like remote_open, but with asynchronous support. */
2042 remote_async_open (char *name
, int from_tty
)
2044 remote_open_1 (name
, from_tty
, &remote_async_ops
, 0, 1);
2047 /* Open a connection to a remote debugger using the extended
2048 remote gdb protocol. NAME is the filename used for communication. */
2051 extended_remote_open (char *name
, int from_tty
)
2053 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */,
2057 /* Just like extended_remote_open, but with asynchronous support. */
2059 extended_remote_async_open (char *name
, int from_tty
)
2061 remote_open_1 (name
, from_tty
, &extended_async_remote_ops
,
2062 1 /*extended_p */, 1 /* async_p */);
2065 /* Generic code for opening a connection to a remote target. */
2068 init_all_packet_configs (void)
2071 update_packet_config (&remote_protocol_P
);
2072 update_packet_config (&remote_protocol_p
);
2073 update_packet_config (&remote_protocol_qSymbol
);
2074 update_packet_config (&remote_protocol_vcont
);
2075 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2076 update_packet_config (&remote_protocol_Z
[i
]);
2077 /* Force remote_write_bytes to check whether target supports binary
2079 update_packet_config (&remote_protocol_binary_download
);
2080 update_packet_config (&remote_protocol_qPart_auxv
);
2083 /* Symbol look-up. */
2086 remote_check_symbols (struct objfile
*objfile
)
2088 struct remote_state
*rs
= get_remote_state ();
2089 char *msg
, *reply
, *tmp
;
2090 struct minimal_symbol
*sym
;
2093 if (remote_protocol_qSymbol
.support
== PACKET_DISABLE
)
2096 msg
= alloca (rs
->remote_packet_size
);
2097 reply
= alloca (rs
->remote_packet_size
);
2099 /* Invite target to request symbol lookups. */
2101 putpkt ("qSymbol::");
2102 getpkt (reply
, (rs
->remote_packet_size
), 0);
2103 packet_ok (reply
, &remote_protocol_qSymbol
);
2105 while (strncmp (reply
, "qSymbol:", 8) == 0)
2108 end
= hex2bin (tmp
, msg
, strlen (tmp
) / 2);
2110 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2112 sprintf (msg
, "qSymbol::%s", &reply
[8]);
2114 sprintf (msg
, "qSymbol:%s:%s",
2115 paddr_nz (SYMBOL_VALUE_ADDRESS (sym
)),
2118 getpkt (reply
, (rs
->remote_packet_size
), 0);
2122 static struct serial
*
2123 remote_serial_open (char *name
)
2125 static int udp_warning
= 0;
2127 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2128 of in ser-tcp.c, because it is the remote protocol assuming that the
2129 serial connection is reliable and not the serial connection promising
2131 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2133 warning ("The remote protocol may be unreliable over UDP.");
2134 warning ("Some events may be lost, rendering further debugging "
2139 return serial_open (name
);
2143 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2144 int extended_p
, int async_p
)
2147 struct remote_state
*rs
= get_remote_state ();
2149 error ("To open a remote debug connection, you need to specify what\n"
2150 "serial device is attached to the remote system\n"
2151 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
2153 /* See FIXME above */
2155 wait_forever_enabled_p
= 1;
2157 reopen_exec_file ();
2160 target_preopen (from_tty
);
2162 unpush_target (target
);
2164 remote_desc
= remote_serial_open (name
);
2166 perror_with_name (name
);
2168 if (baud_rate
!= -1)
2170 if (serial_setbaudrate (remote_desc
, baud_rate
))
2172 /* The requested speed could not be set. Error out to
2173 top level after closing remote_desc. Take care to
2174 set remote_desc to NULL to avoid closing remote_desc
2176 serial_close (remote_desc
);
2178 perror_with_name (name
);
2182 serial_raw (remote_desc
);
2184 /* If there is something sitting in the buffer we might take it as a
2185 response to a command, which would be bad. */
2186 serial_flush_input (remote_desc
);
2190 puts_filtered ("Remote debugging using ");
2191 puts_filtered (name
);
2192 puts_filtered ("\n");
2194 push_target (target
); /* Switch to using remote target now */
2196 init_all_packet_configs ();
2198 general_thread
= -2;
2199 continue_thread
= -2;
2201 /* Probe for ability to use "ThreadInfo" query, as required. */
2202 use_threadinfo_query
= 1;
2203 use_threadextra_query
= 1;
2205 /* Without this, some commands which require an active target (such
2206 as kill) won't work. This variable serves (at least) double duty
2207 as both the pid of the target process (if it has such), and as a
2208 flag indicating that a target is active. These functions should
2209 be split out into seperate variables, especially since GDB will
2210 someday have a notion of debugging several processes. */
2212 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2216 /* With this target we start out by owning the terminal. */
2217 remote_async_terminal_ours_p
= 1;
2219 /* FIXME: cagney/1999-09-23: During the initial connection it is
2220 assumed that the target is already ready and able to respond to
2221 requests. Unfortunately remote_start_remote() eventually calls
2222 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2223 around this. Eventually a mechanism that allows
2224 wait_for_inferior() to expect/get timeouts will be
2226 wait_forever_enabled_p
= 0;
2229 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2230 /* First delete any symbols previously loaded from shared libraries. */
2231 no_shared_libraries (NULL
, 0);
2234 /* Start the remote connection. If error() or QUIT, discard this
2235 target (we'd otherwise be in an inconsistent state) and then
2236 propogate the error on up the exception chain. This ensures that
2237 the caller doesn't stumble along blindly assuming that the
2238 function succeeded. The CLI doesn't have this problem but other
2239 UI's, such as MI do.
2241 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2242 this function should return an error indication letting the
2243 caller restore the previous state. Unfortunately the command
2244 ``target remote'' is directly wired to this function making that
2245 impossible. On a positive note, the CLI side of this problem has
2246 been fixed - the function set_cmd_context() makes it possible for
2247 all the ``target ....'' commands to share a common callback
2248 function. See cli-dump.c. */
2249 ex
= catch_exceptions (uiout
,
2250 remote_start_remote
, NULL
,
2251 "Couldn't establish connection to remote"
2258 wait_forever_enabled_p
= 1;
2259 throw_exception (ex
);
2263 wait_forever_enabled_p
= 1;
2267 /* Tell the remote that we are using the extended protocol. */
2268 char *buf
= alloca (rs
->remote_packet_size
);
2270 getpkt (buf
, (rs
->remote_packet_size
), 0);
2272 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2273 /* FIXME: need a master target_open vector from which all
2274 remote_opens can be called, so that stuff like this can
2275 go there. Failing that, the following code must be copied
2276 to the open function for any remote target that wants to
2277 support svr4 shared libraries. */
2279 /* Set up to detect and load shared libraries. */
2280 if (exec_bfd
) /* No use without an exec file. */
2282 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
2283 remote_check_symbols (symfile_objfile
);
2288 /* This takes a program previously attached to and detaches it. After
2289 this is done, GDB can be used to debug some other program. We
2290 better not have left any breakpoints in the target program or it'll
2291 die when it hits one. */
2294 remote_detach (char *args
, int from_tty
)
2296 struct remote_state
*rs
= get_remote_state ();
2297 char *buf
= alloca (rs
->remote_packet_size
);
2300 error ("Argument given to \"detach\" when remotely debugging.");
2302 /* Tell the remote target to detach. */
2304 remote_send (buf
, (rs
->remote_packet_size
));
2306 /* Unregister the file descriptor from the event loop. */
2307 if (target_is_async_p ())
2308 serial_async (remote_desc
, NULL
, 0);
2310 target_mourn_inferior ();
2312 puts_filtered ("Ending remote debugging.\n");
2315 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2318 remote_disconnect (char *args
, int from_tty
)
2320 struct remote_state
*rs
= get_remote_state ();
2321 char *buf
= alloca (rs
->remote_packet_size
);
2324 error ("Argument given to \"detach\" when remotely debugging.");
2326 /* Unregister the file descriptor from the event loop. */
2327 if (target_is_async_p ())
2328 serial_async (remote_desc
, NULL
, 0);
2330 target_mourn_inferior ();
2332 puts_filtered ("Ending remote debugging.\n");
2335 /* Convert hex digit A to a number. */
2340 if (a
>= '0' && a
<= '9')
2342 else if (a
>= 'a' && a
<= 'f')
2343 return a
- 'a' + 10;
2344 else if (a
>= 'A' && a
<= 'F')
2345 return a
- 'A' + 10;
2347 error ("Reply contains invalid hex digit %d", a
);
2351 hex2bin (const char *hex
, char *bin
, int count
)
2355 for (i
= 0; i
< count
; i
++)
2357 if (hex
[0] == 0 || hex
[1] == 0)
2359 /* Hex string is short, or of uneven length.
2360 Return the count that has been converted so far. */
2363 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
2369 /* Convert number NIB to a hex digit. */
2377 return 'a' + nib
- 10;
2381 bin2hex (const char *bin
, char *hex
, int count
)
2384 /* May use a length, or a nul-terminated string as input. */
2386 count
= strlen (bin
);
2388 for (i
= 0; i
< count
; i
++)
2390 *hex
++ = tohex ((*bin
>> 4) & 0xf);
2391 *hex
++ = tohex (*bin
++ & 0xf);
2397 /* Check for the availability of vCont. This function should also check
2401 remote_vcont_probe (struct remote_state
*rs
, char *buf
)
2403 strcpy (buf
, "vCont?");
2405 getpkt (buf
, rs
->remote_packet_size
, 0);
2407 /* Make sure that the features we assume are supported. */
2408 if (strncmp (buf
, "vCont", 5) == 0)
2411 int support_s
, support_S
, support_c
, support_C
;
2417 while (p
&& *p
== ';')
2420 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2422 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2424 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2426 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2429 p
= strchr (p
, ';');
2432 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2433 BUF will make packet_ok disable the packet. */
2434 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
2438 packet_ok (buf
, &remote_protocol_vcont
);
2441 /* Resume the remote inferior by using a "vCont" packet. The thread
2442 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2443 resumed thread should be single-stepped and/or signalled. If PTID's
2444 PID is -1, then all threads are resumed; the thread to be stepped and/or
2445 signalled is given in the global INFERIOR_PTID. This function returns
2446 non-zero iff it resumes the inferior.
2448 This function issues a strict subset of all possible vCont commands at the
2452 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2454 struct remote_state
*rs
= get_remote_state ();
2455 int pid
= PIDGET (ptid
);
2456 char *buf
= NULL
, *outbuf
;
2457 struct cleanup
*old_cleanup
;
2459 buf
= xmalloc (rs
->remote_packet_size
);
2460 old_cleanup
= make_cleanup (xfree
, buf
);
2462 if (remote_protocol_vcont
.support
== PACKET_SUPPORT_UNKNOWN
)
2463 remote_vcont_probe (rs
, buf
);
2465 if (remote_protocol_vcont
.support
== PACKET_DISABLE
)
2467 do_cleanups (old_cleanup
);
2471 /* If we could generate a wider range of packets, we'd have to worry
2472 about overflowing BUF. Should there be a generic
2473 "multi-part-packet" packet? */
2475 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
)
2477 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2478 don't have any PID numbers the inferior will understand. Make sure
2479 to only send forms that do not specify a PID. */
2480 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2481 outbuf
= xstrprintf ("vCont;S%02x", siggnal
);
2483 outbuf
= xstrprintf ("vCont;s");
2484 else if (siggnal
!= TARGET_SIGNAL_0
)
2485 outbuf
= xstrprintf ("vCont;C%02x", siggnal
);
2487 outbuf
= xstrprintf ("vCont;c");
2491 /* Resume all threads, with preference for INFERIOR_PTID. */
2492 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2493 outbuf
= xstrprintf ("vCont;S%02x:%x;c", siggnal
,
2494 PIDGET (inferior_ptid
));
2496 outbuf
= xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid
));
2497 else if (siggnal
!= TARGET_SIGNAL_0
)
2498 outbuf
= xstrprintf ("vCont;C%02x:%x;c", siggnal
,
2499 PIDGET (inferior_ptid
));
2501 outbuf
= xstrprintf ("vCont;c");
2505 /* Scheduler locking; resume only PTID. */
2506 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2507 outbuf
= xstrprintf ("vCont;S%02x:%x", siggnal
, pid
);
2509 outbuf
= xstrprintf ("vCont;s:%x", pid
);
2510 else if (siggnal
!= TARGET_SIGNAL_0
)
2511 outbuf
= xstrprintf ("vCont;C%02x:%x", siggnal
, pid
);
2513 outbuf
= xstrprintf ("vCont;c:%x", pid
);
2516 gdb_assert (outbuf
&& strlen (outbuf
) < rs
->remote_packet_size
);
2517 make_cleanup (xfree
, outbuf
);
2521 do_cleanups (old_cleanup
);
2526 /* Tell the remote machine to resume. */
2528 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2530 static int last_sent_step
;
2533 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2535 struct remote_state
*rs
= get_remote_state ();
2536 char *buf
= alloca (rs
->remote_packet_size
);
2537 int pid
= PIDGET (ptid
);
2540 last_sent_signal
= siggnal
;
2541 last_sent_step
= step
;
2543 /* A hook for when we need to do something at the last moment before
2545 if (deprecated_target_resume_hook
)
2546 (*deprecated_target_resume_hook
) ();
2548 /* The vCont packet doesn't need to specify threads via Hc. */
2549 if (remote_vcont_resume (ptid
, step
, siggnal
))
2552 /* All other supported resume packets do use Hc, so call set_thread. */
2554 set_thread (0, 0); /* run any thread */
2556 set_thread (pid
, 0); /* run this thread */
2558 if (siggnal
!= TARGET_SIGNAL_0
)
2560 buf
[0] = step
? 'S' : 'C';
2561 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2562 buf
[2] = tohex (((int) siggnal
) & 0xf);
2566 strcpy (buf
, step
? "s" : "c");
2571 /* Same as remote_resume, but with async support. */
2573 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2575 remote_resume (ptid
, step
, siggnal
);
2577 /* We are about to start executing the inferior, let's register it
2578 with the event loop. NOTE: this is the one place where all the
2579 execution commands end up. We could alternatively do this in each
2580 of the execution commands in infcmd.c.*/
2581 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2582 into infcmd.c in order to allow inferior function calls to work
2583 NOT asynchronously. */
2584 if (target_can_async_p ())
2585 target_async (inferior_event_handler
, 0);
2586 /* Tell the world that the target is now executing. */
2587 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2588 this? Instead, should the client of target just assume (for
2589 async targets) that the target is going to start executing? Is
2590 this information already found in the continuation block? */
2591 if (target_is_async_p ())
2592 target_executing
= 1;
2596 /* Set up the signal handler for SIGINT, while the target is
2597 executing, ovewriting the 'regular' SIGINT signal handler. */
2599 initialize_sigint_signal_handler (void)
2601 sigint_remote_token
=
2602 create_async_signal_handler (async_remote_interrupt
, NULL
);
2603 signal (SIGINT
, handle_remote_sigint
);
2606 /* Signal handler for SIGINT, while the target is executing. */
2608 handle_remote_sigint (int sig
)
2610 signal (sig
, handle_remote_sigint_twice
);
2611 sigint_remote_twice_token
=
2612 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2613 mark_async_signal_handler_wrapper (sigint_remote_token
);
2616 /* Signal handler for SIGINT, installed after SIGINT has already been
2617 sent once. It will take effect the second time that the user sends
2620 handle_remote_sigint_twice (int sig
)
2622 signal (sig
, handle_sigint
);
2623 sigint_remote_twice_token
=
2624 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2625 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2628 /* Perform the real interruption of the target execution, in response
2631 async_remote_interrupt (gdb_client_data arg
)
2634 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2639 /* Perform interrupt, if the first attempt did not succeed. Just give
2640 up on the target alltogether. */
2642 async_remote_interrupt_twice (gdb_client_data arg
)
2645 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2646 /* Do something only if the target was not killed by the previous
2648 if (target_executing
)
2651 signal (SIGINT
, handle_remote_sigint
);
2655 /* Reinstall the usual SIGINT handlers, after the target has
2658 cleanup_sigint_signal_handler (void *dummy
)
2660 signal (SIGINT
, handle_sigint
);
2661 if (sigint_remote_twice_token
)
2662 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_twice_token
);
2663 if (sigint_remote_token
)
2664 delete_async_signal_handler ((struct async_signal_handler
**) & sigint_remote_token
);
2667 /* Send ^C to target to halt it. Target will respond, and send us a
2669 static void (*ofunc
) (int);
2671 /* The command line interface's stop routine. This function is installed
2672 as a signal handler for SIGINT. The first time a user requests a
2673 stop, we call remote_stop to send a break or ^C. If there is no
2674 response from the target (it didn't stop when the user requested it),
2675 we ask the user if he'd like to detach from the target. */
2677 remote_interrupt (int signo
)
2679 /* If this doesn't work, try more severe steps. */
2680 signal (signo
, remote_interrupt_twice
);
2683 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2688 /* The user typed ^C twice. */
2691 remote_interrupt_twice (int signo
)
2693 signal (signo
, ofunc
);
2695 signal (signo
, remote_interrupt
);
2698 /* This is the generic stop called via the target vector. When a target
2699 interrupt is requested, either by the command line or the GUI, we
2700 will eventually end up here. */
2704 /* Send a break or a ^C, depending on user preference. */
2706 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2709 serial_send_break (remote_desc
);
2711 serial_write (remote_desc
, "\003", 1);
2714 /* Ask the user what to do when an interrupt is received. */
2717 interrupt_query (void)
2719 target_terminal_ours ();
2721 if (query ("Interrupted while waiting for the program.\n\
2722 Give up (and stop debugging it)? "))
2724 target_mourn_inferior ();
2725 throw_exception (RETURN_QUIT
);
2728 target_terminal_inferior ();
2731 /* Enable/disable target terminal ownership. Most targets can use
2732 terminal groups to control terminal ownership. Remote targets are
2733 different in that explicit transfer of ownership to/from GDB/target
2737 remote_async_terminal_inferior (void)
2739 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2740 sync_execution here. This function should only be called when
2741 GDB is resuming the inferior in the forground. A background
2742 resume (``run&'') should leave GDB in control of the terminal and
2743 consequently should not call this code. */
2744 if (!sync_execution
)
2746 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2747 calls target_terminal_*() idenpotent. The event-loop GDB talking
2748 to an asynchronous target with a synchronous command calls this
2749 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2750 stops trying to transfer the terminal to the target when it
2751 shouldn't this guard can go away. */
2752 if (!remote_async_terminal_ours_p
)
2754 delete_file_handler (input_fd
);
2755 remote_async_terminal_ours_p
= 0;
2756 initialize_sigint_signal_handler ();
2757 /* NOTE: At this point we could also register our selves as the
2758 recipient of all input. Any characters typed could then be
2759 passed on down to the target. */
2763 remote_async_terminal_ours (void)
2765 /* See FIXME in remote_async_terminal_inferior. */
2766 if (!sync_execution
)
2768 /* See FIXME in remote_async_terminal_inferior. */
2769 if (remote_async_terminal_ours_p
)
2771 cleanup_sigint_signal_handler (NULL
);
2772 add_file_handler (input_fd
, stdin_event_handler
, 0);
2773 remote_async_terminal_ours_p
= 1;
2776 /* If nonzero, ignore the next kill. */
2781 remote_console_output (char *msg
)
2785 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
2788 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
2791 fputs_unfiltered (tb
, gdb_stdtarg
);
2793 gdb_flush (gdb_stdtarg
);
2796 /* Wait until the remote machine stops, then return,
2797 storing status in STATUS just as `wait' would.
2798 Returns "pid", which in the case of a multi-threaded
2799 remote OS, is the thread-id. */
2802 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2804 struct remote_state
*rs
= get_remote_state ();
2805 unsigned char *buf
= alloca (rs
->remote_packet_size
);
2806 ULONGEST thread_num
= -1;
2809 status
->kind
= TARGET_WAITKIND_EXITED
;
2810 status
->value
.integer
= 0;
2816 ofunc
= signal (SIGINT
, remote_interrupt
);
2817 getpkt (buf
, (rs
->remote_packet_size
), 1);
2818 signal (SIGINT
, ofunc
);
2820 /* This is a hook for when we need to do something (perhaps the
2821 collection of trace data) every time the target stops. */
2822 if (deprecated_target_wait_loop_hook
)
2823 (*deprecated_target_wait_loop_hook
) ();
2825 remote_stopped_by_watchpoint_p
= 0;
2829 case 'E': /* Error of some sort */
2830 warning ("Remote failure reply: %s", buf
);
2832 case 'F': /* File-I/O request */
2833 remote_fileio_request (buf
);
2835 case 'T': /* Status with PC, SP, FP, ... */
2838 char regs
[MAX_REGISTER_SIZE
];
2840 /* Expedited reply, containing Signal, {regno, reg} repeat */
2841 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2843 n... = register number
2844 r... = register contents
2846 p
= &buf
[3]; /* after Txx */
2855 /* If the packet contains a register number save it in pnum
2856 and set p1 to point to the character following it.
2857 Otherwise p1 points to p. */
2859 /* If this packet is an awatch packet, don't parse the 'a'
2860 as a register number. */
2862 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
2864 /* Read the ``P'' register number. */
2865 pnum
= strtol (p
, &p_temp
, 16);
2866 p1
= (unsigned char *) p_temp
;
2871 if (p1
== p
) /* No register number present here */
2873 p1
= (unsigned char *) strchr (p
, ':');
2875 warning ("Malformed packet(a) (missing colon): %s\n\
2878 if (strncmp (p
, "thread", p1
- p
) == 0)
2880 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2881 record_currthread (thread_num
);
2882 p
= (unsigned char *) p_temp
;
2884 else if ((strncmp (p
, "watch", p1
- p
) == 0)
2885 || (strncmp (p
, "rwatch", p1
- p
) == 0)
2886 || (strncmp (p
, "awatch", p1
- p
) == 0))
2888 remote_stopped_by_watchpoint_p
= 1;
2889 p
= unpack_varlen_hex (++p1
, &addr
);
2890 remote_watch_data_address
= (CORE_ADDR
)addr
;
2894 /* Silently skip unknown optional info. */
2895 p_temp
= strchr (p1
+ 1, ';');
2897 p
= (unsigned char *) p_temp
;
2902 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
2906 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
2910 error ("Remote sent bad register number %s: %s\nPacket: '%s'\n",
2911 phex_nz (pnum
, 0), p
, buf
);
2913 fieldsize
= hex2bin (p
, regs
, register_size (current_gdbarch
, reg
->regnum
));
2915 if (fieldsize
< register_size (current_gdbarch
, reg
->regnum
))
2916 warning ("Remote reply is too short: %s", buf
);
2917 regcache_raw_supply (current_regcache
, reg
->regnum
, regs
);
2921 error ("Remote register badly formatted: %s\nhere: %s", buf
, p
);
2925 case 'S': /* Old style status, just signal only */
2926 status
->kind
= TARGET_WAITKIND_STOPPED
;
2927 status
->value
.sig
= (enum target_signal
)
2928 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2932 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2933 record_currthread (thread_num
);
2936 case 'W': /* Target exited */
2938 /* The remote process exited. */
2939 status
->kind
= TARGET_WAITKIND_EXITED
;
2940 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
2944 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
2945 status
->value
.sig
= (enum target_signal
)
2946 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2950 case 'O': /* Console output */
2951 remote_console_output (buf
+ 1);
2954 if (last_sent_signal
!= TARGET_SIGNAL_0
)
2956 /* Zero length reply means that we tried 'S' or 'C' and
2957 the remote system doesn't support it. */
2958 target_terminal_ours_for_output ();
2960 ("Can't send signals to this remote system. %s not sent.\n",
2961 target_signal_to_name (last_sent_signal
));
2962 last_sent_signal
= TARGET_SIGNAL_0
;
2963 target_terminal_inferior ();
2965 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
2966 putpkt ((char *) buf
);
2969 /* else fallthrough */
2971 warning ("Invalid remote reply: %s", buf
);
2976 if (thread_num
!= -1)
2978 return pid_to_ptid (thread_num
);
2980 return inferior_ptid
;
2983 /* Async version of remote_wait. */
2985 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2987 struct remote_state
*rs
= get_remote_state ();
2988 unsigned char *buf
= alloca (rs
->remote_packet_size
);
2989 ULONGEST thread_num
= -1;
2992 status
->kind
= TARGET_WAITKIND_EXITED
;
2993 status
->value
.integer
= 0;
2995 remote_stopped_by_watchpoint_p
= 0;
3001 if (!target_is_async_p ())
3002 ofunc
= signal (SIGINT
, remote_interrupt
);
3003 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3004 _never_ wait for ever -> test on target_is_async_p().
3005 However, before we do that we need to ensure that the caller
3006 knows how to take the target into/out of async mode. */
3007 getpkt (buf
, (rs
->remote_packet_size
), wait_forever_enabled_p
);
3008 if (!target_is_async_p ())
3009 signal (SIGINT
, ofunc
);
3011 /* This is a hook for when we need to do something (perhaps the
3012 collection of trace data) every time the target stops. */
3013 if (deprecated_target_wait_loop_hook
)
3014 (*deprecated_target_wait_loop_hook
) ();
3018 case 'E': /* Error of some sort */
3019 warning ("Remote failure reply: %s", buf
);
3021 case 'F': /* File-I/O request */
3022 remote_fileio_request (buf
);
3024 case 'T': /* Status with PC, SP, FP, ... */
3027 char regs
[MAX_REGISTER_SIZE
];
3029 /* Expedited reply, containing Signal, {regno, reg} repeat */
3030 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3032 n... = register number
3033 r... = register contents
3035 p
= &buf
[3]; /* after Txx */
3044 /* If the packet contains a register number, save it in pnum
3045 and set p1 to point to the character following it.
3046 Otherwise p1 points to p. */
3048 /* If this packet is an awatch packet, don't parse the 'a'
3049 as a register number. */
3051 if (!strncmp (p
, "awatch", strlen ("awatch")) != 0)
3053 /* Read the register number. */
3054 pnum
= strtol (p
, &p_temp
, 16);
3055 p1
= (unsigned char *) p_temp
;
3060 if (p1
== p
) /* No register number present here */
3062 p1
= (unsigned char *) strchr (p
, ':');
3064 error ("Malformed packet(a) (missing colon): %s\nPacket: '%s'\n",
3066 if (strncmp (p
, "thread", p1
- p
) == 0)
3068 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3069 record_currthread (thread_num
);
3070 p
= (unsigned char *) p_temp
;
3072 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3073 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3074 || (strncmp (p
, "awatch", p1
- p
) == 0))
3076 remote_stopped_by_watchpoint_p
= 1;
3077 p
= unpack_varlen_hex (++p1
, &addr
);
3078 remote_watch_data_address
= (CORE_ADDR
)addr
;
3082 /* Silently skip unknown optional info. */
3083 p_temp
= (unsigned char *) strchr (p1
+ 1, ';');
3091 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
3094 error ("Malformed packet(b) (missing colon): %s\nPacket: '%s'\n",
3098 error ("Remote sent bad register number %ld: %s\nPacket: '%s'\n",
3101 fieldsize
= hex2bin (p
, regs
, register_size (current_gdbarch
, reg
->regnum
));
3103 if (fieldsize
< register_size (current_gdbarch
, reg
->regnum
))
3104 warning ("Remote reply is too short: %s", buf
);
3105 regcache_raw_supply (current_regcache
, reg
->regnum
, regs
);
3109 error ("Remote register badly formatted: %s\nhere: %s",
3114 case 'S': /* Old style status, just signal only */
3115 status
->kind
= TARGET_WAITKIND_STOPPED
;
3116 status
->value
.sig
= (enum target_signal
)
3117 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3121 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3122 record_currthread (thread_num
);
3125 case 'W': /* Target exited */
3127 /* The remote process exited. */
3128 status
->kind
= TARGET_WAITKIND_EXITED
;
3129 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3133 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3134 status
->value
.sig
= (enum target_signal
)
3135 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3139 case 'O': /* Console output */
3140 remote_console_output (buf
+ 1);
3141 /* Return immediately to the event loop. The event loop will
3142 still be waiting on the inferior afterwards. */
3143 status
->kind
= TARGET_WAITKIND_IGNORE
;
3146 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3148 /* Zero length reply means that we tried 'S' or 'C' and
3149 the remote system doesn't support it. */
3150 target_terminal_ours_for_output ();
3152 ("Can't send signals to this remote system. %s not sent.\n",
3153 target_signal_to_name (last_sent_signal
));
3154 last_sent_signal
= TARGET_SIGNAL_0
;
3155 target_terminal_inferior ();
3157 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3158 putpkt ((char *) buf
);
3161 /* else fallthrough */
3163 warning ("Invalid remote reply: %s", buf
);
3168 if (thread_num
!= -1)
3170 return pid_to_ptid (thread_num
);
3172 return inferior_ptid
;
3175 /* Number of bytes of registers this stub implements. */
3177 static int register_bytes_found
;
3179 /* Read the remote registers into the block REGS. */
3180 /* Currently we just read all the registers, so we don't use regnum. */
3183 fetch_register_using_p (int regnum
)
3185 struct remote_state
*rs
= get_remote_state ();
3186 char *buf
= alloca (rs
->remote_packet_size
), *p
;
3187 char regp
[MAX_REGISTER_SIZE
];
3192 p
+= hexnumstr (p
, regnum
);
3194 remote_send (buf
, rs
->remote_packet_size
);
3195 if (buf
[0] != 0 && buf
[0] != 'E')
3203 error ("fetch_register_using_p: early buf termination");
3206 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3209 regcache_raw_supply (current_regcache
, regnum
, regp
);
3217 remote_fetch_registers (int regnum
)
3219 struct remote_state
*rs
= get_remote_state ();
3220 char *buf
= alloca (rs
->remote_packet_size
);
3223 char *regs
= alloca (rs
->sizeof_g_packet
);
3225 set_thread (PIDGET (inferior_ptid
), 1);
3229 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3230 gdb_assert (reg
!= NULL
);
3231 if (!reg
->in_g_packet
)
3232 internal_error (__FILE__
, __LINE__
,
3233 "Attempt to fetch a non G-packet register when this "
3234 "remote.c does not support the p-packet.");
3236 switch (remote_protocol_p
.support
)
3238 case PACKET_DISABLE
:
3241 if (fetch_register_using_p (regnum
))
3244 error ("Protocol error: p packet not recognized by stub");
3245 case PACKET_SUPPORT_UNKNOWN
:
3246 if (fetch_register_using_p (regnum
))
3248 /* The stub recognized the 'p' packet. Remember this. */
3249 remote_protocol_p
.support
= PACKET_ENABLE
;
3254 /* The stub does not support the 'P' packet. Use 'G'
3255 instead, and don't try using 'P' in the future (it
3256 will just waste our time). */
3257 remote_protocol_p
.support
= PACKET_DISABLE
;
3263 remote_send (buf
, (rs
->remote_packet_size
));
3265 /* Save the size of the packet sent to us by the target. Its used
3266 as a heuristic when determining the max size of packets that the
3267 target can safely receive. */
3268 if ((rs
->actual_register_packet_size
) == 0)
3269 (rs
->actual_register_packet_size
) = strlen (buf
);
3271 /* Unimplemented registers read as all bits zero. */
3272 memset (regs
, 0, rs
->sizeof_g_packet
);
3274 /* We can get out of synch in various cases. If the first character
3275 in the buffer is not a hex character, assume that has happened
3276 and try to fetch another packet to read. */
3277 while ((buf
[0] < '0' || buf
[0] > '9')
3278 && (buf
[0] < 'a' || buf
[0] > 'f')
3279 && buf
[0] != 'x') /* New: unavailable register value */
3282 fprintf_unfiltered (gdb_stdlog
,
3283 "Bad register packet; fetching a new packet\n");
3284 getpkt (buf
, (rs
->remote_packet_size
), 0);
3287 /* Reply describes registers byte by byte, each byte encoded as two
3288 hex characters. Suck them all up, then supply them to the
3289 register cacheing/storage mechanism. */
3292 for (i
= 0; i
< rs
->sizeof_g_packet
; i
++)
3298 warning ("Remote reply is of odd length: %s", buf
);
3299 /* Don't change register_bytes_found in this case, and don't
3300 print a second warning. */
3303 if (p
[0] == 'x' && p
[1] == 'x')
3304 regs
[i
] = 0; /* 'x' */
3306 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3310 if (i
!= register_bytes_found
)
3312 register_bytes_found
= i
;
3313 if (REGISTER_BYTES_OK_P ()
3314 && !REGISTER_BYTES_OK (i
))
3315 warning ("Remote reply is too short: %s", buf
);
3321 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3323 struct packet_reg
*r
= &rs
->regs
[i
];
3326 if (r
->offset
* 2 >= strlen (buf
))
3327 /* A short packet that didn't include the register's
3328 value, this implies that the register is zero (and
3329 not that the register is unavailable). Supply that
3331 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3332 else if (buf
[r
->offset
* 2] == 'x')
3334 gdb_assert (r
->offset
* 2 < strlen (buf
));
3335 /* The register isn't available, mark it as such (at
3336 the same time setting the value to zero). */
3337 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3338 set_register_cached (i
, -1);
3341 regcache_raw_supply (current_regcache
, r
->regnum
,
3348 /* Prepare to store registers. Since we may send them all (using a
3349 'G' request), we have to read out the ones we don't want to change
3353 remote_prepare_to_store (void)
3355 struct remote_state
*rs
= get_remote_state ();
3357 char buf
[MAX_REGISTER_SIZE
];
3359 /* Make sure the entire registers array is valid. */
3360 switch (remote_protocol_P
.support
)
3362 case PACKET_DISABLE
:
3363 case PACKET_SUPPORT_UNKNOWN
:
3364 /* Make sure all the necessary registers are cached. */
3365 for (i
= 0; i
< NUM_REGS
; i
++)
3366 if (rs
->regs
[i
].in_g_packet
)
3367 regcache_raw_read (current_regcache
, rs
->regs
[i
].regnum
, buf
);
3374 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3375 packet was not recognized. */
3378 store_register_using_P (int regnum
)
3380 struct remote_state
*rs
= get_remote_state ();
3381 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3382 /* Try storing a single register. */
3383 char *buf
= alloca (rs
->remote_packet_size
);
3384 char regp
[MAX_REGISTER_SIZE
];
3388 sprintf (buf
, "P%s=", phex_nz (reg
->pnum
, 0));
3389 p
= buf
+ strlen (buf
);
3390 regcache_raw_collect (current_regcache
, reg
->regnum
, regp
);
3391 bin2hex (regp
, p
, register_size (current_gdbarch
, reg
->regnum
));
3392 remote_send (buf
, rs
->remote_packet_size
);
3394 return buf
[0] != '\0';
3398 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
3399 of the register cache buffer. FIXME: ignores errors. */
3402 remote_store_registers (int regnum
)
3404 struct remote_state
*rs
= get_remote_state ();
3410 set_thread (PIDGET (inferior_ptid
), 1);
3414 switch (remote_protocol_P
.support
)
3416 case PACKET_DISABLE
:
3419 if (store_register_using_P (regnum
))
3422 error ("Protocol error: P packet not recognized by stub");
3423 case PACKET_SUPPORT_UNKNOWN
:
3424 if (store_register_using_P (regnum
))
3426 /* The stub recognized the 'P' packet. Remember this. */
3427 remote_protocol_P
.support
= PACKET_ENABLE
;
3432 /* The stub does not support the 'P' packet. Use 'G'
3433 instead, and don't try using 'P' in the future (it
3434 will just waste our time). */
3435 remote_protocol_P
.support
= PACKET_DISABLE
;
3441 /* Extract all the registers in the regcache copying them into a
3445 regs
= alloca (rs
->sizeof_g_packet
);
3446 memset (regs
, rs
->sizeof_g_packet
, 0);
3447 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3449 struct packet_reg
*r
= &rs
->regs
[i
];
3451 regcache_raw_collect (current_regcache
, r
->regnum
, regs
+ r
->offset
);
3455 /* Command describes registers byte by byte,
3456 each byte encoded as two hex characters. */
3457 buf
= alloca (rs
->remote_packet_size
);
3460 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3461 bin2hex (regs
, p
, register_bytes_found
);
3462 remote_send (buf
, (rs
->remote_packet_size
));
3466 /* Return the number of hex digits in num. */
3469 hexnumlen (ULONGEST num
)
3473 for (i
= 0; num
!= 0; i
++)
3479 /* Set BUF to the minimum number of hex digits representing NUM. */
3482 hexnumstr (char *buf
, ULONGEST num
)
3484 int len
= hexnumlen (num
);
3485 return hexnumnstr (buf
, num
, len
);
3489 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3492 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3498 for (i
= width
- 1; i
>= 0; i
--)
3500 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3507 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3510 remote_address_masked (CORE_ADDR addr
)
3512 if (remote_address_size
> 0
3513 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3515 /* Only create a mask when that mask can safely be constructed
3516 in a ULONGEST variable. */
3518 mask
= (mask
<< remote_address_size
) - 1;
3524 /* Determine whether the remote target supports binary downloading.
3525 This is accomplished by sending a no-op memory write of zero length
3526 to the target at the specified address. It does not suffice to send
3527 the whole packet, since many stubs strip the eighth bit and subsequently
3528 compute a wrong checksum, which causes real havoc with remote_write_bytes.
3530 NOTE: This can still lose if the serial line is not eight-bit
3531 clean. In cases like this, the user should clear "remote
3535 check_binary_download (CORE_ADDR addr
)
3537 struct remote_state
*rs
= get_remote_state ();
3538 switch (remote_protocol_binary_download
.support
)
3540 case PACKET_DISABLE
:
3544 case PACKET_SUPPORT_UNKNOWN
:
3546 char *buf
= alloca (rs
->remote_packet_size
);
3551 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3553 p
+= hexnumstr (p
, (ULONGEST
) 0);
3557 putpkt_binary (buf
, (int) (p
- buf
));
3558 getpkt (buf
, (rs
->remote_packet_size
), 0);
3563 fprintf_unfiltered (gdb_stdlog
,
3564 "binary downloading NOT suppported by target\n");
3565 remote_protocol_binary_download
.support
= PACKET_DISABLE
;
3570 fprintf_unfiltered (gdb_stdlog
,
3571 "binary downloading suppported by target\n");
3572 remote_protocol_binary_download
.support
= PACKET_ENABLE
;
3579 /* Write memory data directly to the remote machine.
3580 This does not inform the data cache; the data cache uses this.
3581 MEMADDR is the address in the remote memory space.
3582 MYADDR is the address of the buffer in our space.
3583 LEN is the number of bytes.
3585 Returns number of bytes transferred, or 0 (setting errno) for
3586 error. Only transfer a single packet. */
3589 remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3593 unsigned char *plen
;
3599 unsigned char *payload_start
;
3601 /* Verify that the target can support a binary download. */
3602 check_binary_download (memaddr
);
3604 /* Compute the size, and then allocate space for the largest
3605 possible packet. Include space for an extra trailing NUL. */
3606 sizeof_buf
= get_memory_write_packet_size () + 1;
3607 buf
= alloca (sizeof_buf
);
3609 /* Compute the size of the actual payload by subtracting out the
3610 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
3611 payload_size
= (get_memory_write_packet_size () - (strlen ("$M,:#NN")
3612 + hexnumlen (memaddr
)
3613 + hexnumlen (len
)));
3615 /* Construct the packet header: "[MX]<memaddr>,<len>:". */
3617 /* Append "[XM]". Compute a best guess of the number of bytes
3618 actually transfered. */
3620 switch (remote_protocol_binary_download
.support
)
3624 /* Best guess at number of bytes that will fit. */
3625 todo
= min (len
, payload_size
);
3627 case PACKET_DISABLE
:
3629 /* num bytes that will fit */
3630 todo
= min (len
, payload_size
/ 2);
3632 case PACKET_SUPPORT_UNKNOWN
:
3633 internal_error (__FILE__
, __LINE__
,
3634 "remote_write_bytes: bad internal state");
3636 internal_error (__FILE__
, __LINE__
, "bad switch");
3639 /* Append "<memaddr>". */
3640 memaddr
= remote_address_masked (memaddr
);
3641 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3646 /* Append <len>. Retain the location/size of <len>. It may need to
3647 be adjusted once the packet body has been created. */
3649 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
3656 /* Append the packet body. */
3658 switch (remote_protocol_binary_download
.support
)
3661 /* Binary mode. Send target system values byte by byte, in
3662 increasing byte addresses. Only escape certain critical
3665 (nr_bytes
< todo
) && (p
- payload_start
) < payload_size
;
3668 switch (myaddr
[nr_bytes
] & 0xff)
3673 /* These must be escaped */
3675 *p
++ = (myaddr
[nr_bytes
] & 0xff) ^ 0x20;
3678 *p
++ = myaddr
[nr_bytes
] & 0xff;
3682 if (nr_bytes
< todo
)
3684 /* Escape chars have filled up the buffer prematurely,
3685 and we have actually sent fewer bytes than planned.
3686 Fix-up the length field of the packet. Use the same
3687 number of characters as before. */
3688 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
3689 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
3692 case PACKET_DISABLE
:
3693 /* Normal mode: Send target system values byte by byte, in
3694 increasing byte addresses. Each byte is encoded as a two hex
3696 nr_bytes
= bin2hex (myaddr
, p
, todo
);
3699 case PACKET_SUPPORT_UNKNOWN
:
3700 internal_error (__FILE__
, __LINE__
,
3701 "remote_write_bytes: bad internal state");
3703 internal_error (__FILE__
, __LINE__
, "bad switch");
3706 putpkt_binary (buf
, (int) (p
- buf
));
3707 getpkt (buf
, sizeof_buf
, 0);
3711 /* There is no correspondance between what the remote protocol
3712 uses for errors and errno codes. We would like a cleaner way
3713 of representing errors (big enough to include errno codes,
3714 bfd_error codes, and others). But for now just return EIO. */
3719 /* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
3720 bytes than we'd planned. */
3724 /* Read memory data directly from the remote machine.
3725 This does not use the data cache; the data cache uses this.
3726 MEMADDR is the address in the remote memory space.
3727 MYADDR is the address of the buffer in our space.
3728 LEN is the number of bytes.
3730 Returns number of bytes transferred, or 0 for error. */
3732 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3733 remote targets) shouldn't attempt to read the entire buffer.
3734 Instead it should read a single packet worth of data and then
3735 return the byte size of that packet to the caller. The caller (its
3736 caller and its callers caller ;-) already contains code for
3737 handling partial reads. */
3740 remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3743 int max_buf_size
; /* Max size of packet output buffer */
3747 /* Create a buffer big enough for this packet. */
3748 max_buf_size
= get_memory_read_packet_size ();
3749 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NUL */
3750 buf
= alloca (sizeof_buf
);
3759 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
3761 /* construct "m"<memaddr>","<len>" */
3762 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3763 memaddr
= remote_address_masked (memaddr
);
3766 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3768 p
+= hexnumstr (p
, (ULONGEST
) todo
);
3772 getpkt (buf
, sizeof_buf
, 0);
3775 && isxdigit (buf
[1]) && isxdigit (buf
[2])
3778 /* There is no correspondance between what the remote protocol uses
3779 for errors and errno codes. We would like a cleaner way of
3780 representing errors (big enough to include errno codes, bfd_error
3781 codes, and others). But for now just return EIO. */
3786 /* Reply describes memory byte by byte,
3787 each byte encoded as two hex characters. */
3790 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
3792 /* Reply is short. This means that we were able to read
3793 only part of what we wanted to. */
3794 return i
+ (origlen
- len
);
3803 /* Read or write LEN bytes from inferior memory at MEMADDR,
3804 transferring to or from debugger address BUFFER. Write to inferior if
3805 SHOULD_WRITE is nonzero. Returns length of data written or read; 0
3806 for error. TARGET is unused. */
3809 remote_xfer_memory (CORE_ADDR mem_addr
, char *buffer
, int mem_len
,
3810 int should_write
, struct mem_attrib
*attrib
,
3811 struct target_ops
*target
)
3813 CORE_ADDR targ_addr
;
3817 /* Should this be the selected frame? */
3818 gdbarch_remote_translate_xfer_address (current_gdbarch
, current_regcache
,
3820 &targ_addr
, &targ_len
);
3825 res
= remote_write_bytes (targ_addr
, buffer
, targ_len
);
3827 res
= remote_read_bytes (targ_addr
, buffer
, targ_len
);
3833 remote_files_info (struct target_ops
*ignore
)
3835 puts_filtered ("Debugging a target over a serial line.\n");
3838 /* Stuff for dealing with the packets which are part of this protocol.
3839 See comment at top of file for details. */
3841 /* Read a single character from the remote end, masking it down to 7 bits. */
3844 readchar (int timeout
)
3848 ch
= serial_readchar (remote_desc
, timeout
);
3853 switch ((enum serial_rc
) ch
)
3856 target_mourn_inferior ();
3857 error ("Remote connection closed");
3860 perror_with_name ("Remote communication error");
3862 case SERIAL_TIMEOUT
:
3868 /* Send the command in BUF to the remote machine, and read the reply
3869 into BUF. Report an error if we get an error reply. */
3872 remote_send (char *buf
,
3876 getpkt (buf
, sizeof_buf
, 0);
3879 error ("Remote failure reply: %s", buf
);
3882 /* Display a null-terminated packet on stdout, for debugging, using C
3886 print_packet (char *buf
)
3888 puts_filtered ("\"");
3889 fputstr_filtered (buf
, '"', gdb_stdout
);
3890 puts_filtered ("\"");
3896 return putpkt_binary (buf
, strlen (buf
));
3899 /* Send a packet to the remote machine, with error checking. The data
3900 of the packet is in BUF. The string in BUF can be at most (rs->remote_packet_size) - 5
3901 to account for the $, # and checksum, and for a possible /0 if we are
3902 debugging (remote_debug) and want to print the sent packet as a string */
3905 putpkt_binary (char *buf
, int cnt
)
3907 struct remote_state
*rs
= get_remote_state ();
3909 unsigned char csum
= 0;
3910 char *buf2
= alloca (cnt
+ 6);
3911 long sizeof_junkbuf
= (rs
->remote_packet_size
);
3912 char *junkbuf
= alloca (sizeof_junkbuf
);
3918 /* Copy the packet into buffer BUF2, encapsulating it
3919 and giving it a checksum. */
3924 for (i
= 0; i
< cnt
; i
++)
3930 *p
++ = tohex ((csum
>> 4) & 0xf);
3931 *p
++ = tohex (csum
& 0xf);
3933 /* Send it over and over until we get a positive ack. */
3937 int started_error_output
= 0;
3942 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
3943 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
3944 fprintf_unfiltered (gdb_stdlog
, "...");
3945 gdb_flush (gdb_stdlog
);
3947 if (serial_write (remote_desc
, buf2
, p
- buf2
))
3948 perror_with_name ("putpkt: write failed");
3950 /* read until either a timeout occurs (-2) or '+' is read */
3953 ch
= readchar (remote_timeout
);
3961 case SERIAL_TIMEOUT
:
3963 if (started_error_output
)
3965 putchar_unfiltered ('\n');
3966 started_error_output
= 0;
3975 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
3979 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
3980 case SERIAL_TIMEOUT
:
3984 break; /* Retransmit buffer */
3988 fprintf_unfiltered (gdb_stdlog
, "Packet instead of Ack, ignoring it\n");
3989 /* It's probably an old response sent because an ACK
3990 was lost. Gobble up the packet and ack it so it
3991 doesn't get retransmitted when we resend this
3993 read_frame (junkbuf
, sizeof_junkbuf
);
3994 serial_write (remote_desc
, "+", 1);
3995 continue; /* Now, go look for + */
4000 if (!started_error_output
)
4002 started_error_output
= 1;
4003 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
4005 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
4009 break; /* Here to retransmit */
4013 /* This is wrong. If doing a long backtrace, the user should be
4014 able to get out next time we call QUIT, without anything as
4015 violent as interrupt_query. If we want to provide a way out of
4016 here without getting to the next QUIT, it should be based on
4017 hitting ^C twice as in remote_wait. */
4027 /* Come here after finding the start of the frame. Collect the rest
4028 into BUF, verifying the checksum, length, and handling run-length
4029 compression. No more than sizeof_buf-1 characters are read so that
4030 the buffer can be NUL terminated.
4032 Returns -1 on error, number of characters in buffer (ignoring the
4033 trailing NULL) on success. (could be extended to return one of the
4034 SERIAL status indications). */
4037 read_frame (char *buf
,
4049 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
4050 c
= readchar (remote_timeout
);
4053 case SERIAL_TIMEOUT
:
4055 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4059 fputs_filtered ("Saw new packet start in middle of old one\n",
4061 return -1; /* Start a new packet, count retries */
4064 unsigned char pktcsum
;
4070 check_0
= readchar (remote_timeout
);
4072 check_1
= readchar (remote_timeout
);
4074 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4077 fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog
);
4080 else if (check_0
< 0 || check_1
< 0)
4083 fputs_filtered ("Communication error in checksum\n", gdb_stdlog
);
4087 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4088 if (csum
== pktcsum
)
4093 fprintf_filtered (gdb_stdlog
,
4094 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4096 fputs_filtered (buf
, gdb_stdlog
);
4097 fputs_filtered ("\n", gdb_stdlog
);
4099 /* Number of characters in buffer ignoring trailing
4103 case '*': /* Run length encoding */
4108 c
= readchar (remote_timeout
);
4110 repeat
= c
- ' ' + 3; /* Compute repeat count */
4112 /* The character before ``*'' is repeated. */
4114 if (repeat
> 0 && repeat
<= 255
4116 && bc
+ repeat
- 1 < sizeof_buf
- 1)
4118 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4124 printf_filtered ("Repeat count %d too large for buffer: ", repeat
);
4125 puts_filtered (buf
);
4126 puts_filtered ("\n");
4130 if (bc
< sizeof_buf
- 1)
4138 puts_filtered ("Remote packet too long: ");
4139 puts_filtered (buf
);
4140 puts_filtered ("\n");
4147 /* Read a packet from the remote machine, with error checking, and
4148 store it in BUF. If FOREVER, wait forever rather than timing out;
4149 this is used (in synchronous mode) to wait for a target that is is
4150 executing user code to stop. */
4151 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4152 don't have to change all the calls to getpkt to deal with the
4153 return value, because at the moment I don't know what the right
4154 thing to do it for those. */
4162 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4166 /* Read a packet from the remote machine, with error checking, and
4167 store it in BUF. If FOREVER, wait forever rather than timing out;
4168 this is used (in synchronous mode) to wait for a target that is is
4169 executing user code to stop. If FOREVER == 0, this function is
4170 allowed to time out gracefully and return an indication of this to
4173 getpkt_sane (char *buf
,
4182 strcpy (buf
, "timeout");
4186 timeout
= watchdog
> 0 ? watchdog
: -1;
4190 timeout
= remote_timeout
;
4194 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4196 /* This can loop forever if the remote side sends us characters
4197 continuously, but if it pauses, we'll get a zero from readchar
4198 because of timeout. Then we'll count that as a retry. */
4200 /* Note that we will only wait forever prior to the start of a packet.
4201 After that, we expect characters to arrive at a brisk pace. They
4202 should show up within remote_timeout intervals. */
4206 c
= readchar (timeout
);
4208 if (c
== SERIAL_TIMEOUT
)
4210 if (forever
) /* Watchdog went off? Kill the target. */
4213 target_mourn_inferior ();
4214 error ("Watchdog has expired. Target detached.\n");
4217 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4223 /* We've found the start of a packet, now collect the data. */
4225 val
= read_frame (buf
, sizeof_buf
);
4231 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4232 fputstr_unfiltered (buf
, 0, gdb_stdlog
);
4233 fprintf_unfiltered (gdb_stdlog
, "\n");
4235 serial_write (remote_desc
, "+", 1);
4239 /* Try the whole thing again. */
4241 serial_write (remote_desc
, "-", 1);
4244 /* We have tried hard enough, and just can't receive the packet. Give up. */
4246 printf_unfiltered ("Ignoring packet error, continuing...\n");
4247 serial_write (remote_desc
, "+", 1);
4254 /* For some mysterious reason, wait_for_inferior calls kill instead of
4255 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4259 target_mourn_inferior ();
4263 /* Use catch_errors so the user can quit from gdb even when we aren't on
4264 speaking terms with the remote system. */
4265 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4267 /* Don't wait for it to die. I'm not really sure it matters whether
4268 we do or not. For the existing stubs, kill is a noop. */
4269 target_mourn_inferior ();
4272 /* Async version of remote_kill. */
4274 remote_async_kill (void)
4276 /* Unregister the file descriptor from the event loop. */
4277 if (target_is_async_p ())
4278 serial_async (remote_desc
, NULL
, 0);
4280 /* For some mysterious reason, wait_for_inferior calls kill instead of
4281 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4285 target_mourn_inferior ();
4289 /* Use catch_errors so the user can quit from gdb even when we aren't on
4290 speaking terms with the remote system. */
4291 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4293 /* Don't wait for it to die. I'm not really sure it matters whether
4294 we do or not. For the existing stubs, kill is a noop. */
4295 target_mourn_inferior ();
4301 remote_mourn_1 (&remote_ops
);
4305 remote_async_mourn (void)
4307 remote_mourn_1 (&remote_async_ops
);
4311 extended_remote_mourn (void)
4313 /* We do _not_ want to mourn the target like this; this will
4314 remove the extended remote target from the target stack,
4315 and the next time the user says "run" it'll fail.
4317 FIXME: What is the right thing to do here? */
4319 remote_mourn_1 (&extended_remote_ops
);
4323 /* Worker function for remote_mourn. */
4325 remote_mourn_1 (struct target_ops
*target
)
4327 unpush_target (target
);
4328 generic_mourn_inferior ();
4331 /* In the extended protocol we want to be able to do things like
4332 "run" and have them basically work as expected. So we need
4333 a special create_inferior function.
4335 FIXME: One day add support for changing the exec file
4336 we're debugging, arguments and an environment. */
4339 extended_remote_create_inferior (char *exec_file
, char *args
, char **env
,
4342 /* Rip out the breakpoints; we'll reinsert them after restarting
4343 the remote server. */
4344 remove_breakpoints ();
4346 /* Now restart the remote server. */
4347 extended_remote_restart ();
4349 /* Now put the breakpoints back in. This way we're safe if the
4350 restart function works via a unix fork on the remote side. */
4351 insert_breakpoints ();
4353 /* Clean up from the last time we were running. */
4354 clear_proceed_status ();
4356 /* Let the remote process run. */
4357 proceed (-1, TARGET_SIGNAL_0
, 0);
4360 /* Async version of extended_remote_create_inferior. */
4362 extended_remote_async_create_inferior (char *exec_file
, char *args
, char **env
,
4365 /* Rip out the breakpoints; we'll reinsert them after restarting
4366 the remote server. */
4367 remove_breakpoints ();
4369 /* If running asynchronously, register the target file descriptor
4370 with the event loop. */
4371 if (target_can_async_p ())
4372 target_async (inferior_event_handler
, 0);
4374 /* Now restart the remote server. */
4375 extended_remote_restart ();
4377 /* Now put the breakpoints back in. This way we're safe if the
4378 restart function works via a unix fork on the remote side. */
4379 insert_breakpoints ();
4381 /* Clean up from the last time we were running. */
4382 clear_proceed_status ();
4384 /* Let the remote process run. */
4385 proceed (-1, TARGET_SIGNAL_0
, 0);
4389 /* On some machines, e.g. 68k, we may use a different breakpoint
4390 instruction than other targets; in those use
4391 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
4392 Also, bi-endian targets may define
4393 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
4394 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
4395 just call the standard routines that are in mem-break.c. */
4397 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
4398 target should use an identical BREAKPOINT_FROM_PC. As for native,
4399 the ARCH-OS-tdep.c code can override the default. */
4401 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
4402 #define DEPRECATED_REMOTE_BREAKPOINT
4405 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4407 /* If the target isn't bi-endian, just pretend it is. */
4408 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
4409 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4410 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4413 static unsigned char big_break_insn
[] = DEPRECATED_BIG_REMOTE_BREAKPOINT
;
4414 static unsigned char little_break_insn
[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT
;
4416 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4418 /* Insert a breakpoint on targets that don't have any better
4419 breakpoint support. We read the contents of the target location
4420 and stash it, then overwrite it with a breakpoint instruction.
4421 ADDR is the target location in the target machine. CONTENTS_CACHE
4422 is a pointer to memory allocated for saving the target contents.
4423 It is guaranteed by the caller to be long enough to save the number
4424 of bytes returned by BREAKPOINT_FROM_PC. */
4427 remote_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4429 struct remote_state
*rs
= get_remote_state ();
4430 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4435 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4436 If it succeeds, then set the support to PACKET_ENABLE. If it
4437 fails, and the user has explicitly requested the Z support then
4438 report an error, otherwise, mark it disabled and go on. */
4440 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4442 char *buf
= alloca (rs
->remote_packet_size
);
4445 addr
= remote_address_masked (addr
);
4449 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4450 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4451 sprintf (p
, ",%d", bp_size
);
4454 getpkt (buf
, (rs
->remote_packet_size
), 0);
4456 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]))
4462 case PACKET_UNKNOWN
:
4467 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4468 val
= target_read_memory (addr
, contents_cache
, sizeof big_break_insn
);
4472 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
4473 val
= target_write_memory (addr
, (char *) big_break_insn
,
4474 sizeof big_break_insn
);
4476 val
= target_write_memory (addr
, (char *) little_break_insn
,
4477 sizeof little_break_insn
);
4482 return memory_insert_breakpoint (addr
, contents_cache
);
4483 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4487 remote_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4489 struct remote_state
*rs
= get_remote_state ();
4492 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4494 char *buf
= alloca (rs
->remote_packet_size
);
4501 addr
= remote_address_masked (addr
);
4502 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4503 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4504 sprintf (p
, ",%d", bp_size
);
4507 getpkt (buf
, (rs
->remote_packet_size
), 0);
4509 return (buf
[0] == 'E');
4512 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4513 return target_write_memory (addr
, contents_cache
, sizeof big_break_insn
);
4515 return memory_remove_breakpoint (addr
, contents_cache
);
4516 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4520 watchpoint_to_Z_packet (int type
)
4534 internal_error (__FILE__
, __LINE__
,
4535 "hw_bp_to_z: bad watchpoint type %d", type
);
4540 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
4542 struct remote_state
*rs
= get_remote_state ();
4543 char *buf
= alloca (rs
->remote_packet_size
);
4545 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4547 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4548 error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
4549 remote_protocol_Z
[packet
].name
,
4550 remote_protocol_Z
[packet
].title
);
4552 sprintf (buf
, "Z%x,", packet
);
4553 p
= strchr (buf
, '\0');
4554 addr
= remote_address_masked (addr
);
4555 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4556 sprintf (p
, ",%x", len
);
4559 getpkt (buf
, (rs
->remote_packet_size
), 0);
4561 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4564 case PACKET_UNKNOWN
:
4569 internal_error (__FILE__
, __LINE__
,
4570 "remote_insert_watchpoint: reached end of function");
4575 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
4577 struct remote_state
*rs
= get_remote_state ();
4578 char *buf
= alloca (rs
->remote_packet_size
);
4580 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4582 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4583 error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
4584 remote_protocol_Z
[packet
].name
,
4585 remote_protocol_Z
[packet
].title
);
4587 sprintf (buf
, "z%x,", packet
);
4588 p
= strchr (buf
, '\0');
4589 addr
= remote_address_masked (addr
);
4590 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4591 sprintf (p
, ",%x", len
);
4593 getpkt (buf
, (rs
->remote_packet_size
), 0);
4595 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4598 case PACKET_UNKNOWN
:
4603 internal_error (__FILE__
, __LINE__
,
4604 "remote_remove_watchpoint: reached end of function");
4608 int remote_hw_watchpoint_limit
= -1;
4609 int remote_hw_breakpoint_limit
= -1;
4612 remote_check_watch_resources (int type
, int cnt
, int ot
)
4614 if (type
== bp_hardware_breakpoint
)
4616 if (remote_hw_breakpoint_limit
== 0)
4618 else if (remote_hw_breakpoint_limit
< 0)
4620 else if (cnt
<= remote_hw_breakpoint_limit
)
4625 if (remote_hw_watchpoint_limit
== 0)
4627 else if (remote_hw_watchpoint_limit
< 0)
4631 else if (cnt
<= remote_hw_watchpoint_limit
)
4638 remote_stopped_by_watchpoint (void)
4640 return remote_stopped_by_watchpoint_p
;
4643 extern int stepped_after_stopped_by_watchpoint
;
4646 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
4649 if (remote_stopped_by_watchpoint ()
4650 || stepped_after_stopped_by_watchpoint
)
4652 *addr_p
= remote_watch_data_address
;
4661 remote_insert_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4664 struct remote_state
*rs
= get_remote_state ();
4665 char *buf
= alloca (rs
->remote_packet_size
);
4668 /* The length field should be set to the size of a breakpoint
4671 BREAKPOINT_FROM_PC (&addr
, &len
);
4673 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4674 error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
4675 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4676 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4682 addr
= remote_address_masked (addr
);
4683 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4684 sprintf (p
, ",%x", len
);
4687 getpkt (buf
, (rs
->remote_packet_size
), 0);
4689 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4692 case PACKET_UNKNOWN
:
4697 internal_error (__FILE__
, __LINE__
,
4698 "remote_insert_hw_breakpoint: reached end of function");
4703 remote_remove_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4706 struct remote_state
*rs
= get_remote_state ();
4707 char *buf
= alloca (rs
->remote_packet_size
);
4710 /* The length field should be set to the size of a breakpoint
4713 BREAKPOINT_FROM_PC (&addr
, &len
);
4715 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4716 error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
4717 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4718 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4724 addr
= remote_address_masked (addr
);
4725 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4726 sprintf (p
, ",%x", len
);
4729 getpkt (buf
, (rs
->remote_packet_size
), 0);
4731 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4734 case PACKET_UNKNOWN
:
4739 internal_error (__FILE__
, __LINE__
,
4740 "remote_remove_hw_breakpoint: reached end of function");
4743 /* Some targets are only capable of doing downloads, and afterwards
4744 they switch to the remote serial protocol. This function provides
4745 a clean way to get from the download target to the remote target.
4746 It's basically just a wrapper so that we don't have to expose any
4747 of the internal workings of remote.c.
4749 Prior to calling this routine, you should shutdown the current
4750 target code, else you will get the "A program is being debugged
4751 already..." message. Usually a call to pop_target() suffices. */
4754 push_remote_target (char *name
, int from_tty
)
4756 printf_filtered ("Switching to remote protocol\n");
4757 remote_open (name
, from_tty
);
4760 /* Table used by the crc32 function to calcuate the checksum. */
4762 static unsigned long crc32_table
[256] =
4765 static unsigned long
4766 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
4768 if (!crc32_table
[1])
4770 /* Initialize the CRC table and the decoding table. */
4774 for (i
= 0; i
< 256; i
++)
4776 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
4777 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
4784 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
4790 /* compare-sections command
4792 With no arguments, compares each loadable section in the exec bfd
4793 with the same memory range on the target, and reports mismatches.
4794 Useful for verifying the image on the target against the exec file.
4795 Depends on the target understanding the new "qCRC:" request. */
4797 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4798 target method (target verify memory) and generic version of the
4799 actual command. This will allow other high-level code (especially
4800 generic_load()) to make use of this target functionality. */
4803 compare_sections_command (char *args
, int from_tty
)
4805 struct remote_state
*rs
= get_remote_state ();
4807 unsigned long host_crc
, target_crc
;
4808 extern bfd
*exec_bfd
;
4809 struct cleanup
*old_chain
;
4812 const char *sectname
;
4813 char *buf
= alloca (rs
->remote_packet_size
);
4820 error ("command cannot be used without an exec file");
4821 if (!current_target
.to_shortname
||
4822 strcmp (current_target
.to_shortname
, "remote") != 0)
4823 error ("command can only be used with remote target");
4825 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
4827 if (!(s
->flags
& SEC_LOAD
))
4828 continue; /* skip non-loadable section */
4830 size
= bfd_get_section_size (s
);
4832 continue; /* skip zero-length section */
4834 sectname
= bfd_get_section_name (exec_bfd
, s
);
4835 if (args
&& strcmp (args
, sectname
) != 0)
4836 continue; /* not the section selected by user */
4838 matched
= 1; /* do this section */
4840 /* FIXME: assumes lma can fit into long */
4841 sprintf (buf
, "qCRC:%lx,%lx", (long) lma
, (long) size
);
4844 /* be clever; compute the host_crc before waiting for target reply */
4845 sectdata
= xmalloc (size
);
4846 old_chain
= make_cleanup (xfree
, sectdata
);
4847 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
4848 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
4850 getpkt (buf
, (rs
->remote_packet_size
), 0);
4852 error ("target memory fault, section %s, range 0x%s -- 0x%s",
4853 sectname
, paddr (lma
), paddr (lma
+ size
));
4855 error ("remote target does not support this operation");
4857 for (target_crc
= 0, tmp
= &buf
[1]; *tmp
; tmp
++)
4858 target_crc
= target_crc
* 16 + fromhex (*tmp
);
4860 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4861 sectname
, paddr (lma
), paddr (lma
+ size
));
4862 if (host_crc
== target_crc
)
4863 printf_filtered ("matched.\n");
4866 printf_filtered ("MIS-MATCHED!\n");
4870 do_cleanups (old_chain
);
4873 warning ("One or more sections of the remote executable does not match\n\
4874 the loaded file\n");
4875 if (args
&& !matched
)
4876 printf_filtered ("No loaded section named '%s'.\n", args
);
4880 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
4881 const char *annex
, void *readbuf
, const void *writebuf
,
4882 ULONGEST offset
, LONGEST len
)
4884 struct remote_state
*rs
= get_remote_state ();
4886 char *buf2
= alloca (rs
->remote_packet_size
);
4887 char *p2
= &buf2
[0];
4890 /* Handle memory using remote_xfer_memory. */
4891 if (object
== TARGET_OBJECT_MEMORY
)
4896 if (writebuf
!= NULL
)
4898 void *buffer
= xmalloc (len
);
4899 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
4900 memcpy (buffer
, writebuf
, len
);
4901 xfered
= remote_xfer_memory (offset
, buffer
, len
, 1, NULL
, ops
);
4902 do_cleanups (cleanup
);
4905 xfered
= remote_xfer_memory (offset
, readbuf
, len
, 0, NULL
, ops
);
4909 else if (xfered
== 0 && errno
== 0)
4915 /* Only handle reads. */
4916 if (writebuf
!= NULL
|| readbuf
== NULL
)
4919 /* Map pre-existing objects onto letters. DO NOT do this for new
4920 objects!!! Instead specify new query packets. */
4923 case TARGET_OBJECT_KOD
:
4926 case TARGET_OBJECT_AVR
:
4930 case TARGET_OBJECT_AUXV
:
4931 if (remote_protocol_qPart_auxv
.support
!= PACKET_DISABLE
)
4933 unsigned int total
= 0;
4936 LONGEST n
= min ((rs
->remote_packet_size
- 2) / 2, len
);
4937 snprintf (buf2
, rs
->remote_packet_size
,
4938 "qPart:auxv:read::%s,%s",
4939 phex_nz (offset
, sizeof offset
),
4940 phex_nz (n
, sizeof n
));
4943 return total
> 0 ? total
: i
;
4945 getpkt (buf2
, rs
->remote_packet_size
, 0);
4946 if (packet_ok (buf2
, &remote_protocol_qPart_auxv
) != PACKET_OK
)
4947 return total
> 0 ? total
: -1;
4948 if (buf2
[0] == 'O' && buf2
[1] == 'K' && buf2
[2] == '\0')
4949 break; /* Got EOF indicator. */
4950 /* Got some data. */
4951 i
= hex2bin (buf2
, readbuf
, len
);
4954 readbuf
= (void *) ((char *) readbuf
+ i
);
4968 /* Note: a zero OFFSET and LEN can be used to query the minimum
4970 if (offset
== 0 && len
== 0)
4971 return (rs
->remote_packet_size
);
4972 /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is
4973 not large enough let the caller. */
4974 if (len
< (rs
->remote_packet_size
))
4976 len
= rs
->remote_packet_size
;
4978 /* except for querying the minimum buffer size, target must be open */
4980 error ("remote query is only available after target open");
4982 gdb_assert (annex
!= NULL
);
4983 gdb_assert (readbuf
!= NULL
);
4988 /* we used one buffer char for the remote protocol q command and another
4989 for the query type. As the remote protocol encapsulation uses 4 chars
4990 plus one extra in case we are debugging (remote_debug),
4991 we have PBUFZIZ - 7 left to pack the query string */
4993 while (annex
[i
] && (i
< ((rs
->remote_packet_size
) - 8)))
4995 /* Bad caller may have sent forbidden characters. */
4996 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
5001 gdb_assert (annex
[i
] == '\0');
5007 getpkt (readbuf
, len
, 0);
5009 return strlen (readbuf
);
5013 remote_rcmd (char *command
,
5014 struct ui_file
*outbuf
)
5016 struct remote_state
*rs
= get_remote_state ();
5018 char *buf
= alloca (rs
->remote_packet_size
);
5022 error ("remote rcmd is only available after target open");
5024 /* Send a NULL command across as an empty command */
5025 if (command
== NULL
)
5028 /* The query prefix */
5029 strcpy (buf
, "qRcmd,");
5030 p
= strchr (buf
, '\0');
5032 if ((strlen (buf
) + strlen (command
) * 2 + 8/*misc*/) > (rs
->remote_packet_size
))
5033 error ("\"monitor\" command ``%s'' is too long\n", command
);
5035 /* Encode the actual command */
5036 bin2hex (command
, p
, 0);
5038 if (putpkt (buf
) < 0)
5039 error ("Communication problem with target\n");
5041 /* get/display the response */
5044 /* XXX - see also tracepoint.c:remote_get_noisy_reply() */
5046 getpkt (buf
, (rs
->remote_packet_size
), 0);
5048 error ("Target does not support this command\n");
5049 if (buf
[0] == 'O' && buf
[1] != 'K')
5051 remote_console_output (buf
+ 1); /* 'O' message from stub */
5054 if (strcmp (buf
, "OK") == 0)
5056 if (strlen (buf
) == 3 && buf
[0] == 'E'
5057 && isdigit (buf
[1]) && isdigit (buf
[2]))
5059 error ("Protocol error with Rcmd");
5061 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
5063 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
5064 fputc_unfiltered (c
, outbuf
);
5071 packet_command (char *args
, int from_tty
)
5073 struct remote_state
*rs
= get_remote_state ();
5074 char *buf
= alloca (rs
->remote_packet_size
);
5077 error ("command can only be used with remote target");
5080 error ("remote-packet command requires packet text as argument");
5082 puts_filtered ("sending: ");
5083 print_packet (args
);
5084 puts_filtered ("\n");
5087 getpkt (buf
, (rs
->remote_packet_size
), 0);
5088 puts_filtered ("received: ");
5090 puts_filtered ("\n");
5094 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
5096 static void display_thread_info (struct gdb_ext_thread_info
*info
);
5098 static void threadset_test_cmd (char *cmd
, int tty
);
5100 static void threadalive_test (char *cmd
, int tty
);
5102 static void threadlist_test_cmd (char *cmd
, int tty
);
5104 int get_and_display_threadinfo (threadref
* ref
);
5106 static void threadinfo_test_cmd (char *cmd
, int tty
);
5108 static int thread_display_step (threadref
* ref
, void *context
);
5110 static void threadlist_update_test_cmd (char *cmd
, int tty
);
5112 static void init_remote_threadtests (void);
5114 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
5117 threadset_test_cmd (char *cmd
, int tty
)
5119 int sample_thread
= SAMPLE_THREAD
;
5121 printf_filtered ("Remote threadset test\n");
5122 set_thread (sample_thread
, 1);
5127 threadalive_test (char *cmd
, int tty
)
5129 int sample_thread
= SAMPLE_THREAD
;
5131 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5132 printf_filtered ("PASS: Thread alive test\n");
5134 printf_filtered ("FAIL: Thread alive test\n");
5137 void output_threadid (char *title
, threadref
* ref
);
5140 output_threadid (char *title
, threadref
*ref
)
5144 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex */
5146 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5150 threadlist_test_cmd (char *cmd
, int tty
)
5153 threadref nextthread
;
5154 int done
, result_count
;
5155 threadref threadlist
[3];
5157 printf_filtered ("Remote Threadlist test\n");
5158 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5159 &result_count
, &threadlist
[0]))
5160 printf_filtered ("FAIL: threadlist test\n");
5163 threadref
*scan
= threadlist
;
5164 threadref
*limit
= scan
+ result_count
;
5166 while (scan
< limit
)
5167 output_threadid (" thread ", scan
++);
5172 display_thread_info (struct gdb_ext_thread_info
*info
)
5174 output_threadid ("Threadid: ", &info
->threadid
);
5175 printf_filtered ("Name: %s\n ", info
->shortname
);
5176 printf_filtered ("State: %s\n", info
->display
);
5177 printf_filtered ("other: %s\n\n", info
->more_display
);
5181 get_and_display_threadinfo (threadref
*ref
)
5185 struct gdb_ext_thread_info threadinfo
;
5187 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5188 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5189 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5190 display_thread_info (&threadinfo
);
5195 threadinfo_test_cmd (char *cmd
, int tty
)
5197 int athread
= SAMPLE_THREAD
;
5201 int_to_threadref (&thread
, athread
);
5202 printf_filtered ("Remote Threadinfo test\n");
5203 if (!get_and_display_threadinfo (&thread
))
5204 printf_filtered ("FAIL cannot get thread info\n");
5208 thread_display_step (threadref
*ref
, void *context
)
5210 /* output_threadid(" threadstep ",ref); *//* simple test */
5211 return get_and_display_threadinfo (ref
);
5215 threadlist_update_test_cmd (char *cmd
, int tty
)
5217 printf_filtered ("Remote Threadlist update test\n");
5218 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5222 init_remote_threadtests (void)
5224 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
5225 "Fetch and print the remote list of thread identifiers, one pkt only");
5226 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5227 "Fetch and display info about one thread");
5228 add_com ("tset", class_obscure
, threadset_test_cmd
,
5229 "Test setting to a different thread");
5230 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5231 "Iterate through updating all remote thread info");
5232 add_com ("talive", class_obscure
, threadalive_test
,
5233 " Remote thread alive test ");
5238 /* Convert a thread ID to a string. Returns the string in a static
5242 remote_pid_to_str (ptid_t ptid
)
5244 static char buf
[30];
5246 sprintf (buf
, "Thread %d", PIDGET (ptid
));
5251 init_remote_ops (void)
5253 remote_ops
.to_shortname
= "remote";
5254 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
5256 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5257 Specify the serial device it is connected to\n\
5258 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5259 remote_ops
.to_open
= remote_open
;
5260 remote_ops
.to_close
= remote_close
;
5261 remote_ops
.to_detach
= remote_detach
;
5262 remote_ops
.to_disconnect
= remote_disconnect
;
5263 remote_ops
.to_resume
= remote_resume
;
5264 remote_ops
.to_wait
= remote_wait
;
5265 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
5266 remote_ops
.to_store_registers
= remote_store_registers
;
5267 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5268 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
5269 remote_ops
.to_files_info
= remote_files_info
;
5270 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5271 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5272 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5273 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5274 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5275 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5276 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5277 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5278 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5279 remote_ops
.to_kill
= remote_kill
;
5280 remote_ops
.to_load
= generic_load
;
5281 remote_ops
.to_mourn_inferior
= remote_mourn
;
5282 remote_ops
.to_thread_alive
= remote_thread_alive
;
5283 remote_ops
.to_find_new_threads
= remote_threads_info
;
5284 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
5285 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5286 remote_ops
.to_stop
= remote_stop
;
5287 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
5288 remote_ops
.to_rcmd
= remote_rcmd
;
5289 remote_ops
.to_stratum
= process_stratum
;
5290 remote_ops
.to_has_all_memory
= 1;
5291 remote_ops
.to_has_memory
= 1;
5292 remote_ops
.to_has_stack
= 1;
5293 remote_ops
.to_has_registers
= 1;
5294 remote_ops
.to_has_execution
= 1;
5295 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5296 remote_ops
.to_magic
= OPS_MAGIC
;
5299 /* Set up the extended remote vector by making a copy of the standard
5300 remote vector and adding to it. */
5303 init_extended_remote_ops (void)
5305 extended_remote_ops
= remote_ops
;
5307 extended_remote_ops
.to_shortname
= "extended-remote";
5308 extended_remote_ops
.to_longname
=
5309 "Extended remote serial target in gdb-specific protocol";
5310 extended_remote_ops
.to_doc
=
5311 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5312 Specify the serial device it is connected to (e.g. /dev/ttya).",
5313 extended_remote_ops
.to_open
= extended_remote_open
;
5314 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
5315 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5319 remote_can_async_p (void)
5321 /* We're async whenever the serial device is. */
5322 return (current_target
.to_async_mask_value
) && serial_can_async_p (remote_desc
);
5326 remote_is_async_p (void)
5328 /* We're async whenever the serial device is. */
5329 return (current_target
.to_async_mask_value
) && serial_is_async_p (remote_desc
);
5332 /* Pass the SERIAL event on and up to the client. One day this code
5333 will be able to delay notifying the client of an event until the
5334 point where an entire packet has been received. */
5336 static void (*async_client_callback
) (enum inferior_event_type event_type
, void *context
);
5337 static void *async_client_context
;
5338 static serial_event_ftype remote_async_serial_handler
;
5341 remote_async_serial_handler (struct serial
*scb
, void *context
)
5343 /* Don't propogate error information up to the client. Instead let
5344 the client find out about the error by querying the target. */
5345 async_client_callback (INF_REG_EVENT
, async_client_context
);
5349 remote_async (void (*callback
) (enum inferior_event_type event_type
, void *context
), void *context
)
5351 if (current_target
.to_async_mask_value
== 0)
5352 internal_error (__FILE__
, __LINE__
,
5353 "Calling remote_async when async is masked");
5355 if (callback
!= NULL
)
5357 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
5358 async_client_callback
= callback
;
5359 async_client_context
= context
;
5362 serial_async (remote_desc
, NULL
, NULL
);
5365 /* Target async and target extended-async.
5367 This are temporary targets, until it is all tested. Eventually
5368 async support will be incorporated int the usual 'remote'
5372 init_remote_async_ops (void)
5374 remote_async_ops
.to_shortname
= "async";
5375 remote_async_ops
.to_longname
= "Remote serial target in async version of the gdb-specific protocol";
5376 remote_async_ops
.to_doc
=
5377 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5378 Specify the serial device it is connected to (e.g. /dev/ttya).";
5379 remote_async_ops
.to_open
= remote_async_open
;
5380 remote_async_ops
.to_close
= remote_close
;
5381 remote_async_ops
.to_detach
= remote_detach
;
5382 remote_async_ops
.to_disconnect
= remote_disconnect
;
5383 remote_async_ops
.to_resume
= remote_async_resume
;
5384 remote_async_ops
.to_wait
= remote_async_wait
;
5385 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
5386 remote_async_ops
.to_store_registers
= remote_store_registers
;
5387 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5388 remote_async_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
5389 remote_async_ops
.to_files_info
= remote_files_info
;
5390 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5391 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5392 remote_async_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5393 remote_async_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5394 remote_async_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5395 remote_async_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5396 remote_async_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5397 remote_async_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5398 remote_async_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5399 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
5400 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
5401 remote_async_ops
.to_kill
= remote_async_kill
;
5402 remote_async_ops
.to_load
= generic_load
;
5403 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
5404 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
5405 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
5406 remote_async_ops
.to_pid_to_str
= remote_pid_to_str
;
5407 remote_async_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5408 remote_async_ops
.to_stop
= remote_stop
;
5409 remote_async_ops
.to_xfer_partial
= remote_xfer_partial
;
5410 remote_async_ops
.to_rcmd
= remote_rcmd
;
5411 remote_async_ops
.to_stratum
= process_stratum
;
5412 remote_async_ops
.to_has_all_memory
= 1;
5413 remote_async_ops
.to_has_memory
= 1;
5414 remote_async_ops
.to_has_stack
= 1;
5415 remote_async_ops
.to_has_registers
= 1;
5416 remote_async_ops
.to_has_execution
= 1;
5417 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5418 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
5419 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
5420 remote_async_ops
.to_async
= remote_async
;
5421 remote_async_ops
.to_async_mask_value
= 1;
5422 remote_async_ops
.to_magic
= OPS_MAGIC
;
5425 /* Set up the async extended remote vector by making a copy of the standard
5426 remote vector and adding to it. */
5429 init_extended_async_remote_ops (void)
5431 extended_async_remote_ops
= remote_async_ops
;
5433 extended_async_remote_ops
.to_shortname
= "extended-async";
5434 extended_async_remote_ops
.to_longname
=
5435 "Extended remote serial target in async gdb-specific protocol";
5436 extended_async_remote_ops
.to_doc
=
5437 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5438 Specify the serial device it is connected to (e.g. /dev/ttya).",
5439 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
5440 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
5441 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5445 set_remote_cmd (char *args
, int from_tty
)
5450 show_remote_cmd (char *args
, int from_tty
)
5452 /* FIXME: cagney/2002-06-15: This function should iterate over
5453 remote_show_cmdlist for a list of sub commands to show. */
5454 show_remote_protocol_Z_packet_cmd (args
, from_tty
, NULL
);
5455 show_remote_protocol_P_packet_cmd (args
, from_tty
, NULL
);
5456 show_remote_protocol_p_packet_cmd (args
, from_tty
, NULL
);
5457 show_remote_protocol_qSymbol_packet_cmd (args
, from_tty
, NULL
);
5458 show_remote_protocol_vcont_packet_cmd (args
, from_tty
, NULL
);
5459 show_remote_protocol_binary_download_cmd (args
, from_tty
, NULL
);
5460 show_remote_protocol_qPart_auxv_packet_cmd (args
, from_tty
, NULL
);
5464 build_remote_gdbarch_data (void)
5466 remote_address_size
= TARGET_ADDR_BIT
;
5469 /* Saved pointer to previous owner of the new_objfile event. */
5470 static void (*remote_new_objfile_chain
) (struct objfile
*);
5472 /* Function to be called whenever a new objfile (shlib) is detected. */
5474 remote_new_objfile (struct objfile
*objfile
)
5476 if (remote_desc
!= 0) /* Have a remote connection */
5478 remote_check_symbols (objfile
);
5480 /* Call predecessor on chain, if any. */
5481 if (remote_new_objfile_chain
!= 0 &&
5483 remote_new_objfile_chain (objfile
);
5487 _initialize_remote (void)
5489 static struct cmd_list_element
*remote_set_cmdlist
;
5490 static struct cmd_list_element
*remote_show_cmdlist
;
5491 struct cmd_list_element
*tmpcmd
;
5493 /* architecture specific data */
5494 remote_gdbarch_data_handle
= gdbarch_data_register_post_init (init_remote_state
);
5496 /* Old tacky stuff. NOTE: This comes after the remote protocol so
5497 that the remote protocol has been initialized. */
5498 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size
);
5499 deprecated_register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
5502 add_target (&remote_ops
);
5504 init_extended_remote_ops ();
5505 add_target (&extended_remote_ops
);
5507 init_remote_async_ops ();
5508 add_target (&remote_async_ops
);
5510 init_extended_async_remote_ops ();
5511 add_target (&extended_async_remote_ops
);
5513 /* Hook into new objfile notification. */
5514 remote_new_objfile_chain
= deprecated_target_new_objfile_hook
;
5515 deprecated_target_new_objfile_hook
= remote_new_objfile
;
5518 init_remote_threadtests ();
5521 /* set/show remote ... */
5523 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, "\
5524 Remote protocol specific variables\n\
5525 Configure various remote-protocol specific variables such as\n\
5526 the packets being used",
5527 &remote_set_cmdlist
, "set remote ",
5528 0/*allow-unknown*/, &setlist
);
5529 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, "\
5530 Remote protocol specific variables\n\
5531 Configure various remote-protocol specific variables such as\n\
5532 the packets being used",
5533 &remote_show_cmdlist
, "show remote ",
5534 0/*allow-unknown*/, &showlist
);
5536 add_cmd ("compare-sections", class_obscure
, compare_sections_command
,
5537 "Compare section data on target to the exec file.\n\
5538 Argument is a single section name (default: all loaded sections).",
5541 add_cmd ("packet", class_maintenance
, packet_command
,
5542 "Send an arbitrary packet to a remote target.\n\
5543 maintenance packet TEXT\n\
5544 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5545 this command sends the string TEXT to the inferior, and displays the\n\
5546 response packet. GDB supplies the initial `$' character, and the\n\
5547 terminating `#' character and checksum.",
5550 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, "\
5551 Set whether to send break if interrupted.", "\
5552 Show whether to send break if interrupted.", "\
5553 If set, a break, instead of a cntrl-c, is sent to the remote target.", "\
5554 Whether to send break if interrupted is %s.",
5556 &setlist
, &showlist
);
5558 /* Install commands for configuring memory read/write packets. */
5560 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
,
5561 "Set the maximum number of bytes per memory write packet (deprecated).\n",
5563 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
,
5564 "Show the maximum number of bytes per memory write packet (deprecated).\n",
5566 add_cmd ("memory-write-packet-size", no_class
,
5567 set_memory_write_packet_size
,
5568 "Set the maximum number of bytes per memory-write packet.\n"
5569 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5570 "default packet size. The actual limit is further reduced\n"
5571 "dependent on the target. Specify ``fixed'' to disable the\n"
5572 "further restriction and ``limit'' to enable that restriction\n",
5573 &remote_set_cmdlist
);
5574 add_cmd ("memory-read-packet-size", no_class
,
5575 set_memory_read_packet_size
,
5576 "Set the maximum number of bytes per memory-read packet.\n"
5577 "Specify the number of bytes in a packet or 0 (zero) for the\n"
5578 "default packet size. The actual limit is further reduced\n"
5579 "dependent on the target. Specify ``fixed'' to disable the\n"
5580 "further restriction and ``limit'' to enable that restriction\n",
5581 &remote_set_cmdlist
);
5582 add_cmd ("memory-write-packet-size", no_class
,
5583 show_memory_write_packet_size
,
5584 "Show the maximum number of bytes per memory-write packet.\n",
5585 &remote_show_cmdlist
);
5586 add_cmd ("memory-read-packet-size", no_class
,
5587 show_memory_read_packet_size
,
5588 "Show the maximum number of bytes per memory-read packet.\n",
5589 &remote_show_cmdlist
);
5591 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
5592 &remote_hw_watchpoint_limit
, "\
5593 Set the maximum number of target hardware watchpoints.", "\
5594 Show the maximum number of target hardware watchpoints.", "\
5595 Specify a negative limit for unlimited.", "\
5596 The maximum number of target hardware watchpoints is %s.",
5598 &remote_set_cmdlist
, &remote_show_cmdlist
);
5599 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
5600 &remote_hw_breakpoint_limit
, "\
5601 Set the maximum number of target hardware breakpoints.", "\
5602 Show the maximum number of target hardware breakpoints.", "\
5603 Specify a negative limit for unlimited.", "\
5604 The maximum number of target hardware breakpoints is %s.",
5606 &remote_set_cmdlist
, &remote_show_cmdlist
);
5608 deprecated_add_show_from_set
5609 (add_set_cmd ("remoteaddresssize", class_obscure
,
5610 var_integer
, (char *) &remote_address_size
,
5611 "Set the maximum size of the address (in bits) \
5612 in a memory packet.\n",
5616 add_packet_config_cmd (&remote_protocol_binary_download
,
5617 "X", "binary-download",
5618 set_remote_protocol_binary_download_cmd
,
5619 show_remote_protocol_binary_download_cmd
,
5620 &remote_set_cmdlist
, &remote_show_cmdlist
,
5623 /* XXXX - should ``set remotebinarydownload'' be retained for
5625 deprecated_add_show_from_set
5626 (add_set_cmd ("remotebinarydownload", no_class
,
5627 var_boolean
, (char *) &remote_binary_download
,
5628 "Set binary downloads.\n", &setlist
),
5632 add_packet_config_cmd (&remote_protocol_vcont
,
5633 "vCont", "verbose-resume",
5634 set_remote_protocol_vcont_packet_cmd
,
5635 show_remote_protocol_vcont_packet_cmd
,
5636 &remote_set_cmdlist
, &remote_show_cmdlist
,
5639 add_packet_config_cmd (&remote_protocol_qSymbol
,
5640 "qSymbol", "symbol-lookup",
5641 set_remote_protocol_qSymbol_packet_cmd
,
5642 show_remote_protocol_qSymbol_packet_cmd
,
5643 &remote_set_cmdlist
, &remote_show_cmdlist
,
5646 add_packet_config_cmd (&remote_protocol_P
,
5647 "P", "set-register",
5648 set_remote_protocol_P_packet_cmd
,
5649 show_remote_protocol_P_packet_cmd
,
5650 &remote_set_cmdlist
, &remote_show_cmdlist
,
5653 add_packet_config_cmd (&remote_protocol_p
,
5654 "p", "fetch-register",
5655 set_remote_protocol_p_packet_cmd
,
5656 show_remote_protocol_p_packet_cmd
,
5657 &remote_set_cmdlist
, &remote_show_cmdlist
,
5660 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
],
5661 "Z0", "software-breakpoint",
5662 set_remote_protocol_Z_software_bp_packet_cmd
,
5663 show_remote_protocol_Z_software_bp_packet_cmd
,
5664 &remote_set_cmdlist
, &remote_show_cmdlist
,
5667 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
],
5668 "Z1", "hardware-breakpoint",
5669 set_remote_protocol_Z_hardware_bp_packet_cmd
,
5670 show_remote_protocol_Z_hardware_bp_packet_cmd
,
5671 &remote_set_cmdlist
, &remote_show_cmdlist
,
5674 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
],
5675 "Z2", "write-watchpoint",
5676 set_remote_protocol_Z_write_wp_packet_cmd
,
5677 show_remote_protocol_Z_write_wp_packet_cmd
,
5678 &remote_set_cmdlist
, &remote_show_cmdlist
,
5681 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
],
5682 "Z3", "read-watchpoint",
5683 set_remote_protocol_Z_read_wp_packet_cmd
,
5684 show_remote_protocol_Z_read_wp_packet_cmd
,
5685 &remote_set_cmdlist
, &remote_show_cmdlist
,
5688 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
],
5689 "Z4", "access-watchpoint",
5690 set_remote_protocol_Z_access_wp_packet_cmd
,
5691 show_remote_protocol_Z_access_wp_packet_cmd
,
5692 &remote_set_cmdlist
, &remote_show_cmdlist
,
5695 add_packet_config_cmd (&remote_protocol_qPart_auxv
,
5696 "qPart_auxv", "read-aux-vector",
5697 set_remote_protocol_qPart_auxv_packet_cmd
,
5698 show_remote_protocol_qPart_auxv_packet_cmd
,
5699 &remote_set_cmdlist
, &remote_show_cmdlist
,
5702 /* Keep the old ``set remote Z-packet ...'' working. */
5703 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
5704 &remote_Z_packet_detect
, "\
5705 Set use of remote protocol `Z' packets", "\
5706 Show use of remote protocol `Z' packets ", "\
5707 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
5709 Use of remote protocol `Z' packets is %s",
5710 set_remote_protocol_Z_packet_cmd
,
5711 show_remote_protocol_Z_packet_cmd
,
5712 &remote_set_cmdlist
, &remote_show_cmdlist
);
5714 /* Eventually initialize fileio. See fileio.c */
5715 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);