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"
33 #include "exceptions.h"
35 /*#include "terminal.h" */
38 #include "gdb-stabs.h"
39 #include "gdbthread.h"
43 #include "gdb_assert.h"
48 #include "event-loop.h"
49 #include "event-top.h"
55 #include "gdbcore.h" /* for exec_bfd */
57 #include "remote-fileio.h"
59 /* Prototypes for local functions. */
60 static void cleanup_sigint_signal_handler (void *dummy
);
61 static void initialize_sigint_signal_handler (void);
62 static int getpkt_sane (char *buf
, long sizeof_buf
, int forever
);
64 static void handle_remote_sigint (int);
65 static void handle_remote_sigint_twice (int);
66 static void async_remote_interrupt (gdb_client_data
);
67 void async_remote_interrupt_twice (gdb_client_data
);
69 static void build_remote_gdbarch_data (void);
71 static void remote_files_info (struct target_ops
*ignore
);
73 static int remote_xfer_memory (CORE_ADDR memaddr
, char *myaddr
,
74 int len
, int should_write
,
75 struct mem_attrib
*attrib
,
76 struct target_ops
*target
);
78 static void remote_prepare_to_store (void);
80 static void remote_fetch_registers (int regno
);
82 static void remote_resume (ptid_t ptid
, int step
,
83 enum target_signal siggnal
);
84 static void remote_async_resume (ptid_t ptid
, int step
,
85 enum target_signal siggnal
);
86 static void remote_open (char *name
, int from_tty
);
87 static void remote_async_open (char *name
, int from_tty
);
89 static void extended_remote_open (char *name
, int from_tty
);
90 static void extended_remote_async_open (char *name
, int from_tty
);
92 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
,
95 static void remote_close (int quitting
);
97 static void remote_store_registers (int regno
);
99 static void remote_mourn (void);
100 static void remote_async_mourn (void);
102 static void extended_remote_restart (void);
104 static void extended_remote_mourn (void);
106 static void remote_mourn_1 (struct target_ops
*);
108 static void remote_send (char *buf
, long sizeof_buf
);
110 static int readchar (int timeout
);
112 static ptid_t
remote_wait (ptid_t ptid
,
113 struct target_waitstatus
*status
);
114 static ptid_t
remote_async_wait (ptid_t ptid
,
115 struct target_waitstatus
*status
);
117 static void remote_kill (void);
118 static void remote_async_kill (void);
120 static int tohex (int nib
);
122 static void remote_detach (char *args
, int from_tty
);
124 static void remote_interrupt (int signo
);
126 static void remote_interrupt_twice (int signo
);
128 static void interrupt_query (void);
130 static void set_thread (int, int);
132 static int remote_thread_alive (ptid_t
);
134 static void get_offsets (void);
136 static long read_frame (char *buf
, long sizeof_buf
);
138 static int remote_insert_breakpoint (CORE_ADDR
, char *);
140 static int remote_remove_breakpoint (CORE_ADDR
, char *);
142 static int hexnumlen (ULONGEST num
);
144 static void init_remote_ops (void);
146 static void init_extended_remote_ops (void);
148 static void remote_stop (void);
150 static int ishex (int ch
, int *val
);
152 static int stubhex (int ch
);
154 static int hexnumstr (char *, ULONGEST
);
156 static int hexnumnstr (char *, ULONGEST
, int);
158 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
160 static void print_packet (char *);
162 static unsigned long crc32 (unsigned char *, int, unsigned int);
164 static void compare_sections_command (char *, int);
166 static void packet_command (char *, int);
168 static int stub_unpack_int (char *buff
, int fieldlength
);
170 static ptid_t
remote_current_thread (ptid_t oldptid
);
172 static void remote_find_new_threads (void);
174 static void record_currthread (int currthread
);
176 static int fromhex (int a
);
178 static int hex2bin (const char *hex
, char *bin
, int count
);
180 static int bin2hex (const char *bin
, char *hex
, int count
);
182 static int putpkt_binary (char *buf
, int cnt
);
184 static void check_binary_download (CORE_ADDR addr
);
186 struct packet_config
;
188 static void show_packet_config_cmd (struct packet_config
*config
);
190 static void update_packet_config (struct packet_config
*config
);
192 void _initialize_remote (void);
194 /* Description of the remote protocol. Strictly speaking, when the
195 target is open()ed, remote.c should create a per-target description
196 of the remote protocol using that target's architecture.
197 Unfortunately, the target stack doesn't include local state. For
198 the moment keep the information in the target's architecture
203 long offset
; /* Offset into G packet. */
204 long regnum
; /* GDB's internal register number. */
205 LONGEST pnum
; /* Remote protocol register number. */
206 int in_g_packet
; /* Always part of G packet. */
207 /* long size in bytes; == register_size (current_gdbarch, regnum);
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 show_value_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
,
663 "", NULL
/* FIXME: i18n: Print message is? */,
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 (struct ui_file
*file
, int from_tty
,
754 struct cmd_list_element
*c
,
757 deprecated_show_value_hack (file
, from_tty
, c
, value
);
758 show_packet_config_cmd (&remote_protocol_vcont
);
761 /* Should we try the 'qSymbol' (target symbol lookup service) request? */
762 static struct packet_config remote_protocol_qSymbol
;
765 set_remote_protocol_qSymbol_packet_cmd (char *args
, int from_tty
,
766 struct cmd_list_element
*c
)
768 update_packet_config (&remote_protocol_qSymbol
);
772 show_remote_protocol_qSymbol_packet_cmd (struct ui_file
*file
, int from_tty
,
773 struct cmd_list_element
*c
,
776 deprecated_show_value_hack (file
, from_tty
, c
, value
);
777 show_packet_config_cmd (&remote_protocol_qSymbol
);
780 /* Should we try the 'P' (set register) request? */
782 static struct packet_config remote_protocol_P
;
785 set_remote_protocol_P_packet_cmd (char *args
, int from_tty
,
786 struct cmd_list_element
*c
)
788 update_packet_config (&remote_protocol_P
);
792 show_remote_protocol_P_packet_cmd (struct ui_file
*file
, int from_tty
,
793 struct cmd_list_element
*c
,
796 deprecated_show_value_hack (file
, from_tty
, c
, value
);
797 show_packet_config_cmd (&remote_protocol_P
);
800 /* Should we try one of the 'Z' requests? */
804 Z_PACKET_SOFTWARE_BP
,
805 Z_PACKET_HARDWARE_BP
,
812 static struct packet_config remote_protocol_Z
[NR_Z_PACKET_TYPES
];
814 /* FIXME: Instead of having all these boiler plate functions, the
815 command callback should include a context argument. */
818 set_remote_protocol_Z_software_bp_packet_cmd (char *args
, int from_tty
,
819 struct cmd_list_element
*c
)
821 update_packet_config (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
825 show_remote_protocol_Z_software_bp_packet_cmd (struct ui_file
*file
, int from_tty
,
826 struct cmd_list_element
*c
,
829 deprecated_show_value_hack (file
, from_tty
, c
, value
);
830 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]);
834 set_remote_protocol_Z_hardware_bp_packet_cmd (char *args
, int from_tty
,
835 struct cmd_list_element
*c
)
837 update_packet_config (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
841 show_remote_protocol_Z_hardware_bp_packet_cmd (struct ui_file
*file
, int from_tty
,
842 struct cmd_list_element
*c
,
845 deprecated_show_value_hack (file
, from_tty
, c
, value
);
846 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]);
850 set_remote_protocol_Z_write_wp_packet_cmd (char *args
, int from_tty
,
851 struct cmd_list_element
*c
)
853 update_packet_config (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
857 show_remote_protocol_Z_write_wp_packet_cmd (struct ui_file
*file
, int from_tty
,
858 struct cmd_list_element
*c
,
861 deprecated_show_value_hack (file
, from_tty
, c
, value
);
862 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
]);
866 set_remote_protocol_Z_read_wp_packet_cmd (char *args
, int from_tty
,
867 struct cmd_list_element
*c
)
869 update_packet_config (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
873 show_remote_protocol_Z_read_wp_packet_cmd (struct ui_file
*file
, int from_tty
,
874 struct cmd_list_element
*c
,
877 deprecated_show_value_hack (file
, from_tty
, c
, value
);
878 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
]);
882 set_remote_protocol_Z_access_wp_packet_cmd (char *args
, int from_tty
,
883 struct cmd_list_element
*c
)
885 update_packet_config (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
889 show_remote_protocol_Z_access_wp_packet_cmd (struct ui_file
*file
, int from_tty
,
890 struct cmd_list_element
*c
,
893 deprecated_show_value_hack (file
, from_tty
, c
, value
);
894 show_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
]);
897 /* For compatibility with older distributions. Provide a ``set remote
898 Z-packet ...'' command that updates all the Z packet types. */
900 static enum auto_boolean remote_Z_packet_detect
;
903 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
904 struct cmd_list_element
*c
)
907 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
909 remote_protocol_Z
[i
].detect
= remote_Z_packet_detect
;
910 update_packet_config (&remote_protocol_Z
[i
]);
915 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
916 struct cmd_list_element
*c
,
920 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
922 show_packet_config_cmd (&remote_protocol_Z
[i
]);
926 /* Should we try the 'X' (remote binary download) packet?
928 This variable (available to the user via "set remote X-packet")
929 dictates whether downloads are sent in binary (via the 'X' packet).
930 We assume that the stub can, and attempt to do it. This will be
931 cleared if the stub does not understand it. This switch is still
932 needed, though in cases when the packet is supported in the stub,
933 but the connection does not allow it (i.e., 7-bit serial connection
936 static struct packet_config remote_protocol_binary_download
;
938 /* Should we try the 'ThreadInfo' query packet?
940 This variable (NOT available to the user: auto-detect only!)
941 determines whether GDB will use the new, simpler "ThreadInfo"
942 query or the older, more complex syntax for thread queries.
943 This is an auto-detect variable (set to true at each connect,
944 and set to false when the target fails to recognize it). */
946 static int use_threadinfo_query
;
947 static int use_threadextra_query
;
950 set_remote_protocol_binary_download_cmd (char *args
,
952 struct cmd_list_element
*c
)
954 update_packet_config (&remote_protocol_binary_download
);
958 show_remote_protocol_binary_download_cmd (struct ui_file
*file
, int from_tty
,
959 struct cmd_list_element
*c
,
962 deprecated_show_value_hack (file
, from_tty
, c
, value
);
963 show_packet_config_cmd (&remote_protocol_binary_download
);
966 /* Should we try the 'qPart:auxv' (target auxiliary vector read) request? */
967 static struct packet_config remote_protocol_qPart_auxv
;
970 set_remote_protocol_qPart_auxv_packet_cmd (char *args
, int from_tty
,
971 struct cmd_list_element
*c
)
973 update_packet_config (&remote_protocol_qPart_auxv
);
977 show_remote_protocol_qPart_auxv_packet_cmd (struct ui_file
*file
, int from_tty
,
978 struct cmd_list_element
*c
,
981 deprecated_show_value_hack (file
, from_tty
, c
, value
);
982 show_packet_config_cmd (&remote_protocol_qPart_auxv
);
985 static struct packet_config remote_protocol_p
;
988 set_remote_protocol_p_packet_cmd (char *args
, int from_tty
,
989 struct cmd_list_element
*c
)
991 update_packet_config (&remote_protocol_p
);
995 show_remote_protocol_p_packet_cmd (struct ui_file
*file
, int from_tty
,
996 struct cmd_list_element
*c
,
999 deprecated_show_value_hack (file
, from_tty
, c
, value
);
1000 show_packet_config_cmd (&remote_protocol_p
);
1005 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1006 static void *sigint_remote_twice_token
;
1007 static void *sigint_remote_token
;
1009 /* These are pointers to hook functions that may be set in order to
1010 modify resume/wait behavior for a particular architecture. */
1012 void (*deprecated_target_resume_hook
) (void);
1013 void (*deprecated_target_wait_loop_hook
) (void);
1017 /* These are the threads which we last sent to the remote system.
1018 -1 for all or -2 for not sent yet. */
1019 static int general_thread
;
1020 static int continue_thread
;
1022 /* Call this function as a result of
1023 1) A halt indication (T packet) containing a thread id
1024 2) A direct query of currthread
1025 3) Successful execution of set thread
1029 record_currthread (int currthread
)
1031 general_thread
= currthread
;
1033 /* If this is a new thread, add it to GDB's thread list.
1034 If we leave it up to WFI to do this, bad things will happen. */
1035 if (!in_thread_list (pid_to_ptid (currthread
)))
1037 add_thread (pid_to_ptid (currthread
));
1038 ui_out_text (uiout
, "[New ");
1039 ui_out_text (uiout
, target_pid_to_str (pid_to_ptid (currthread
)));
1040 ui_out_text (uiout
, "]\n");
1044 #define MAGIC_NULL_PID 42000
1047 set_thread (int th
, int gen
)
1049 struct remote_state
*rs
= get_remote_state ();
1050 char *buf
= alloca (rs
->remote_packet_size
);
1051 int state
= gen
? general_thread
: continue_thread
;
1057 buf
[1] = gen
? 'g' : 'c';
1058 if (th
== MAGIC_NULL_PID
)
1064 sprintf (&buf
[2], "-%x", -th
);
1066 sprintf (&buf
[2], "%x", th
);
1068 getpkt (buf
, (rs
->remote_packet_size
), 0);
1070 general_thread
= th
;
1072 continue_thread
= th
;
1075 /* Return nonzero if the thread TH is still alive on the remote system. */
1078 remote_thread_alive (ptid_t ptid
)
1080 int tid
= PIDGET (ptid
);
1084 sprintf (buf
, "T-%08x", -tid
);
1086 sprintf (buf
, "T%08x", tid
);
1088 getpkt (buf
, sizeof (buf
), 0);
1089 return (buf
[0] == 'O' && buf
[1] == 'K');
1092 /* About these extended threadlist and threadinfo packets. They are
1093 variable length packets but, the fields within them are often fixed
1094 length. They are redundent enough to send over UDP as is the
1095 remote protocol in general. There is a matching unit test module
1098 #define OPAQUETHREADBYTES 8
1100 /* a 64 bit opaque identifier */
1101 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1103 /* WARNING: This threadref data structure comes from the remote O.S.,
1104 libstub protocol encoding, and remote.c. it is not particularly
1107 /* Right now, the internal structure is int. We want it to be bigger.
1111 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1113 /* gdb_ext_thread_info is an internal GDB data structure which is
1114 equivalint to the reply of the remote threadinfo packet. */
1116 struct gdb_ext_thread_info
1118 threadref threadid
; /* External form of thread reference. */
1119 int active
; /* Has state interesting to GDB?
1121 char display
[256]; /* Brief state display, name,
1122 blocked/syspended. */
1123 char shortname
[32]; /* To be used to name threads. */
1124 char more_display
[256]; /* Long info, statistics, queue depth,
1128 /* The volume of remote transfers can be limited by submitting
1129 a mask containing bits specifying the desired information.
1130 Use a union of these values as the 'selection' parameter to
1131 get_thread_info. FIXME: Make these TAG names more thread specific.
1134 #define TAG_THREADID 1
1135 #define TAG_EXISTS 2
1136 #define TAG_DISPLAY 4
1137 #define TAG_THREADNAME 8
1138 #define TAG_MOREDISPLAY 16
1140 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1142 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1144 static char *unpack_nibble (char *buf
, int *val
);
1146 static char *pack_nibble (char *buf
, int nibble
);
1148 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1150 static char *unpack_byte (char *buf
, int *value
);
1152 static char *pack_int (char *buf
, int value
);
1154 static char *unpack_int (char *buf
, int *value
);
1156 static char *unpack_string (char *src
, char *dest
, int length
);
1158 static char *pack_threadid (char *pkt
, threadref
*id
);
1160 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1162 void int_to_threadref (threadref
*id
, int value
);
1164 static int threadref_to_int (threadref
*ref
);
1166 static void copy_threadref (threadref
*dest
, threadref
*src
);
1168 static int threadmatch (threadref
*dest
, threadref
*src
);
1170 static char *pack_threadinfo_request (char *pkt
, int mode
,
1173 static int remote_unpack_thread_info_response (char *pkt
,
1174 threadref
*expectedref
,
1175 struct gdb_ext_thread_info
1179 static int remote_get_threadinfo (threadref
*threadid
,
1180 int fieldset
, /*TAG mask */
1181 struct gdb_ext_thread_info
*info
);
1183 static char *pack_threadlist_request (char *pkt
, int startflag
,
1185 threadref
*nextthread
);
1187 static int parse_threadlist_response (char *pkt
,
1189 threadref
*original_echo
,
1190 threadref
*resultlist
,
1193 static int remote_get_threadlist (int startflag
,
1194 threadref
*nextthread
,
1198 threadref
*threadlist
);
1200 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1202 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1203 void *context
, int looplimit
);
1205 static int remote_newthread_step (threadref
*ref
, void *context
);
1207 /* Encode 64 bits in 16 chars of hex. */
1209 static const char hexchars
[] = "0123456789abcdef";
1212 ishex (int ch
, int *val
)
1214 if ((ch
>= 'a') && (ch
<= 'f'))
1216 *val
= ch
- 'a' + 10;
1219 if ((ch
>= 'A') && (ch
<= 'F'))
1221 *val
= ch
- 'A' + 10;
1224 if ((ch
>= '0') && (ch
<= '9'))
1235 if (ch
>= 'a' && ch
<= 'f')
1236 return ch
- 'a' + 10;
1237 if (ch
>= '0' && ch
<= '9')
1239 if (ch
>= 'A' && ch
<= 'F')
1240 return ch
- 'A' + 10;
1245 stub_unpack_int (char *buff
, int fieldlength
)
1252 nibble
= stubhex (*buff
++);
1256 retval
= retval
<< 4;
1262 unpack_varlen_hex (char *buff
, /* packet to parse */
1268 while (ishex (*buff
, &nibble
))
1271 retval
= retval
<< 4;
1272 retval
|= nibble
& 0x0f;
1279 unpack_nibble (char *buf
, int *val
)
1281 ishex (*buf
++, val
);
1286 pack_nibble (char *buf
, int nibble
)
1288 *buf
++ = hexchars
[(nibble
& 0x0f)];
1293 pack_hex_byte (char *pkt
, int byte
)
1295 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1296 *pkt
++ = hexchars
[(byte
& 0xf)];
1301 unpack_byte (char *buf
, int *value
)
1303 *value
= stub_unpack_int (buf
, 2);
1308 pack_int (char *buf
, int value
)
1310 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1311 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1312 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1313 buf
= pack_hex_byte (buf
, (value
& 0xff));
1318 unpack_int (char *buf
, int *value
)
1320 *value
= stub_unpack_int (buf
, 8);
1324 #if 0 /* Currently unused, uncomment when needed. */
1325 static char *pack_string (char *pkt
, char *string
);
1328 pack_string (char *pkt
, char *string
)
1333 len
= strlen (string
);
1335 len
= 200; /* Bigger than most GDB packets, junk??? */
1336 pkt
= pack_hex_byte (pkt
, len
);
1340 if ((ch
== '\0') || (ch
== '#'))
1341 ch
= '*'; /* Protect encapsulation. */
1346 #endif /* 0 (unused) */
1349 unpack_string (char *src
, char *dest
, int length
)
1358 pack_threadid (char *pkt
, threadref
*id
)
1361 unsigned char *altid
;
1363 altid
= (unsigned char *) id
;
1364 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1366 pkt
= pack_hex_byte (pkt
, *altid
++);
1372 unpack_threadid (char *inbuf
, threadref
*id
)
1375 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1378 altref
= (char *) id
;
1380 while (inbuf
< limit
)
1382 x
= stubhex (*inbuf
++);
1383 y
= stubhex (*inbuf
++);
1384 *altref
++ = (x
<< 4) | y
;
1389 /* Externally, threadrefs are 64 bits but internally, they are still
1390 ints. This is due to a mismatch of specifications. We would like
1391 to use 64bit thread references internally. This is an adapter
1395 int_to_threadref (threadref
*id
, int value
)
1397 unsigned char *scan
;
1399 scan
= (unsigned char *) id
;
1405 *scan
++ = (value
>> 24) & 0xff;
1406 *scan
++ = (value
>> 16) & 0xff;
1407 *scan
++ = (value
>> 8) & 0xff;
1408 *scan
++ = (value
& 0xff);
1412 threadref_to_int (threadref
*ref
)
1415 unsigned char *scan
;
1417 scan
= (char *) ref
;
1421 value
= (value
<< 8) | ((*scan
++) & 0xff);
1426 copy_threadref (threadref
*dest
, threadref
*src
)
1429 unsigned char *csrc
, *cdest
;
1431 csrc
= (unsigned char *) src
;
1432 cdest
= (unsigned char *) dest
;
1439 threadmatch (threadref
*dest
, threadref
*src
)
1441 /* Things are broken right now, so just assume we got a match. */
1443 unsigned char *srcp
, *destp
;
1445 srcp
= (char *) src
;
1446 destp
= (char *) dest
;
1450 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1457 threadid:1, # always request threadid
1464 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1467 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1469 *pkt
++ = 'q'; /* Info Query */
1470 *pkt
++ = 'P'; /* process or thread info */
1471 pkt
= pack_int (pkt
, mode
); /* mode */
1472 pkt
= pack_threadid (pkt
, id
); /* threadid */
1473 *pkt
= '\0'; /* terminate */
1477 /* These values tag the fields in a thread info response packet. */
1478 /* Tagging the fields allows us to request specific fields and to
1479 add more fields as time goes by. */
1481 #define TAG_THREADID 1 /* Echo the thread identifier. */
1482 #define TAG_EXISTS 2 /* Is this process defined enough to
1483 fetch registers and its stack? */
1484 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1485 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1486 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1490 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1491 struct gdb_ext_thread_info
*info
)
1493 struct remote_state
*rs
= get_remote_state ();
1497 char *limit
= pkt
+ (rs
->remote_packet_size
); /* plausable parsing limit */
1500 /* info->threadid = 0; FIXME: implement zero_threadref. */
1502 info
->display
[0] = '\0';
1503 info
->shortname
[0] = '\0';
1504 info
->more_display
[0] = '\0';
1506 /* Assume the characters indicating the packet type have been
1508 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1509 pkt
= unpack_threadid (pkt
, &ref
);
1512 warning (_("Incomplete response to threadinfo request."));
1513 if (!threadmatch (&ref
, expectedref
))
1514 { /* This is an answer to a different request. */
1515 warning (_("ERROR RMT Thread info mismatch."));
1518 copy_threadref (&info
->threadid
, &ref
);
1520 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1522 /* Packets are terminated with nulls. */
1523 while ((pkt
< limit
) && mask
&& *pkt
)
1525 pkt
= unpack_int (pkt
, &tag
); /* tag */
1526 pkt
= unpack_byte (pkt
, &length
); /* length */
1527 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1529 warning (_("ERROR RMT: threadinfo tag mismatch."));
1533 if (tag
== TAG_THREADID
)
1537 warning (_("ERROR RMT: length of threadid is not 16."));
1541 pkt
= unpack_threadid (pkt
, &ref
);
1542 mask
= mask
& ~TAG_THREADID
;
1545 if (tag
== TAG_EXISTS
)
1547 info
->active
= stub_unpack_int (pkt
, length
);
1549 mask
= mask
& ~(TAG_EXISTS
);
1552 warning (_("ERROR RMT: 'exists' length too long."));
1558 if (tag
== TAG_THREADNAME
)
1560 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1561 mask
= mask
& ~TAG_THREADNAME
;
1564 if (tag
== TAG_DISPLAY
)
1566 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1567 mask
= mask
& ~TAG_DISPLAY
;
1570 if (tag
== TAG_MOREDISPLAY
)
1572 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1573 mask
= mask
& ~TAG_MOREDISPLAY
;
1576 warning (_("ERROR RMT: unknown thread info tag."));
1577 break; /* Not a tag we know about. */
1583 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1584 struct gdb_ext_thread_info
*info
)
1586 struct remote_state
*rs
= get_remote_state ();
1588 char *threadinfo_pkt
= alloca (rs
->remote_packet_size
);
1590 pack_threadinfo_request (threadinfo_pkt
, fieldset
, threadid
);
1591 putpkt (threadinfo_pkt
);
1592 getpkt (threadinfo_pkt
, (rs
->remote_packet_size
), 0);
1593 result
= remote_unpack_thread_info_response (threadinfo_pkt
+ 2,
1598 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1601 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1602 threadref
*nextthread
)
1604 *pkt
++ = 'q'; /* info query packet */
1605 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1606 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1607 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1608 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1613 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1616 parse_threadlist_response (char *pkt
, int result_limit
,
1617 threadref
*original_echo
, threadref
*resultlist
,
1620 struct remote_state
*rs
= get_remote_state ();
1622 int count
, resultcount
, done
;
1625 /* Assume the 'q' and 'M chars have been stripped. */
1626 limit
= pkt
+ ((rs
->remote_packet_size
) - BUF_THREAD_ID_SIZE
);
1627 /* done parse past here */
1628 pkt
= unpack_byte (pkt
, &count
); /* count field */
1629 pkt
= unpack_nibble (pkt
, &done
);
1630 /* The first threadid is the argument threadid. */
1631 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
1632 while ((count
-- > 0) && (pkt
< limit
))
1634 pkt
= unpack_threadid (pkt
, resultlist
++);
1635 if (resultcount
++ >= result_limit
)
1644 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
1645 int *done
, int *result_count
, threadref
*threadlist
)
1647 struct remote_state
*rs
= get_remote_state ();
1648 static threadref echo_nextthread
;
1649 char *threadlist_packet
= alloca (rs
->remote_packet_size
);
1650 char *t_response
= alloca (rs
->remote_packet_size
);
1653 /* Trancate result limit to be smaller than the packet size. */
1654 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= (rs
->remote_packet_size
))
1655 result_limit
= ((rs
->remote_packet_size
) / BUF_THREAD_ID_SIZE
) - 2;
1657 pack_threadlist_request (threadlist_packet
,
1658 startflag
, result_limit
, nextthread
);
1659 putpkt (threadlist_packet
);
1660 getpkt (t_response
, (rs
->remote_packet_size
), 0);
1663 parse_threadlist_response (t_response
+ 2, result_limit
, &echo_nextthread
,
1666 if (!threadmatch (&echo_nextthread
, nextthread
))
1668 /* FIXME: This is a good reason to drop the packet. */
1669 /* Possably, there is a duplicate response. */
1671 retransmit immediatly - race conditions
1672 retransmit after timeout - yes
1674 wait for packet, then exit
1676 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
1677 return 0; /* I choose simply exiting. */
1679 if (*result_count
<= 0)
1683 warning (_("RMT ERROR : failed to get remote thread list."));
1686 return result
; /* break; */
1688 if (*result_count
> result_limit
)
1691 warning (_("RMT ERROR: threadlist response longer than requested."));
1697 /* This is the interface between remote and threads, remotes upper
1700 /* remote_find_new_threads retrieves the thread list and for each
1701 thread in the list, looks up the thread in GDB's internal list,
1702 ading the thread if it does not already exist. This involves
1703 getting partial thread lists from the remote target so, polling the
1704 quit_flag is required. */
1707 /* About this many threadisds fit in a packet. */
1709 #define MAXTHREADLISTRESULTS 32
1712 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
1715 int done
, i
, result_count
;
1719 static threadref nextthread
;
1720 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
1725 if (loopcount
++ > looplimit
)
1728 warning (_("Remote fetch threadlist -infinite loop-."));
1731 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
1732 &done
, &result_count
, resultthreadlist
))
1737 /* Clear for later iterations. */
1739 /* Setup to resume next batch of thread references, set nextthread. */
1740 if (result_count
>= 1)
1741 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
1743 while (result_count
--)
1744 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
1751 remote_newthread_step (threadref
*ref
, void *context
)
1755 ptid
= pid_to_ptid (threadref_to_int (ref
));
1757 if (!in_thread_list (ptid
))
1759 return 1; /* continue iterator */
1762 #define CRAZY_MAX_THREADS 1000
1765 remote_current_thread (ptid_t oldpid
)
1767 struct remote_state
*rs
= get_remote_state ();
1768 char *buf
= alloca (rs
->remote_packet_size
);
1771 getpkt (buf
, (rs
->remote_packet_size
), 0);
1772 if (buf
[0] == 'Q' && buf
[1] == 'C')
1773 /* Use strtoul here, so we'll correctly parse values whose highest
1774 bit is set. The protocol carries them as a simple series of
1775 hex digits; in the absence of a sign, strtol will see such
1776 values as positive numbers out of range for signed 'long', and
1777 return LONG_MAX to indicate an overflow. */
1778 return pid_to_ptid (strtoul (&buf
[2], NULL
, 16));
1783 /* Find new threads for info threads command.
1784 * Original version, using John Metzler's thread protocol.
1788 remote_find_new_threads (void)
1790 remote_threadlist_iterator (remote_newthread_step
, 0,
1792 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
) /* ack ack ack */
1793 inferior_ptid
= remote_current_thread (inferior_ptid
);
1797 * Find all threads for info threads command.
1798 * Uses new thread protocol contributed by Cisco.
1799 * Falls back and attempts to use the older method (above)
1800 * if the target doesn't respond to the new method.
1804 remote_threads_info (void)
1806 struct remote_state
*rs
= get_remote_state ();
1807 char *buf
= alloca (rs
->remote_packet_size
);
1811 if (remote_desc
== 0) /* paranoia */
1812 error (_("Command can only be used when connected to the remote target."));
1814 if (use_threadinfo_query
)
1816 putpkt ("qfThreadInfo");
1818 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1819 if (bufp
[0] != '\0') /* q packet recognized */
1821 while (*bufp
++ == 'm') /* reply contains one or more TID */
1825 /* Use strtoul here, so we'll correctly parse values
1826 whose highest bit is set. The protocol carries
1827 them as a simple series of hex digits; in the
1828 absence of a sign, strtol will see such values as
1829 positive numbers out of range for signed 'long',
1830 and return LONG_MAX to indicate an overflow. */
1831 tid
= strtoul (bufp
, &bufp
, 16);
1832 if (tid
!= 0 && !in_thread_list (pid_to_ptid (tid
)))
1833 add_thread (pid_to_ptid (tid
));
1835 while (*bufp
++ == ','); /* comma-separated list */
1836 putpkt ("qsThreadInfo");
1838 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1844 /* Else fall back to old method based on jmetzler protocol. */
1845 use_threadinfo_query
= 0;
1846 remote_find_new_threads ();
1851 * Collect a descriptive string about the given thread.
1852 * The target may say anything it wants to about the thread
1853 * (typically info about its blocked / runnable state, name, etc.).
1854 * This string will appear in the info threads display.
1856 * Optional: targets are not required to implement this function.
1860 remote_threads_extra_info (struct thread_info
*tp
)
1862 struct remote_state
*rs
= get_remote_state ();
1866 struct gdb_ext_thread_info threadinfo
;
1867 static char display_buf
[100]; /* arbitrary... */
1868 char *bufp
= alloca (rs
->remote_packet_size
);
1869 int n
= 0; /* position in display_buf */
1871 if (remote_desc
== 0) /* paranoia */
1872 internal_error (__FILE__
, __LINE__
,
1873 _("remote_threads_extra_info"));
1875 if (use_threadextra_query
)
1877 sprintf (bufp
, "qThreadExtraInfo,%x", PIDGET (tp
->ptid
));
1879 getpkt (bufp
, (rs
->remote_packet_size
), 0);
1882 n
= min (strlen (bufp
) / 2, sizeof (display_buf
));
1883 result
= hex2bin (bufp
, display_buf
, n
);
1884 display_buf
[result
] = '\0';
1889 /* If the above query fails, fall back to the old method. */
1890 use_threadextra_query
= 0;
1891 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
1892 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
1893 int_to_threadref (&id
, PIDGET (tp
->ptid
));
1894 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
1895 if (threadinfo
.active
)
1897 if (*threadinfo
.shortname
)
1898 n
+= sprintf(&display_buf
[0], " Name: %s,", threadinfo
.shortname
);
1899 if (*threadinfo
.display
)
1900 n
+= sprintf(&display_buf
[n
], " State: %s,", threadinfo
.display
);
1901 if (*threadinfo
.more_display
)
1902 n
+= sprintf(&display_buf
[n
], " Priority: %s",
1903 threadinfo
.more_display
);
1907 /* For purely cosmetic reasons, clear up trailing commas. */
1908 if (',' == display_buf
[n
-1])
1909 display_buf
[n
-1] = ' ';
1918 /* Restart the remote side; this is an extended protocol operation. */
1921 extended_remote_restart (void)
1923 struct remote_state
*rs
= get_remote_state ();
1924 char *buf
= alloca (rs
->remote_packet_size
);
1926 /* Send the restart command; for reasons I don't understand the
1927 remote side really expects a number after the "R". */
1929 sprintf (&buf
[1], "%x", 0);
1932 /* Now query for status so this looks just like we restarted
1933 gdbserver from scratch. */
1935 getpkt (buf
, (rs
->remote_packet_size
), 0);
1938 /* Clean up connection to a remote debugger. */
1941 remote_close (int quitting
)
1944 serial_close (remote_desc
);
1948 /* Query the remote side for the text, data and bss offsets. */
1953 struct remote_state
*rs
= get_remote_state ();
1954 char *buf
= alloca (rs
->remote_packet_size
);
1957 CORE_ADDR text_addr
, data_addr
, bss_addr
;
1958 struct section_offsets
*offs
;
1960 putpkt ("qOffsets");
1962 getpkt (buf
, (rs
->remote_packet_size
), 0);
1964 if (buf
[0] == '\000')
1965 return; /* Return silently. Stub doesn't support
1969 warning (_("Remote failure reply: %s"), buf
);
1973 /* Pick up each field in turn. This used to be done with scanf, but
1974 scanf will make trouble if CORE_ADDR size doesn't match
1975 conversion directives correctly. The following code will work
1976 with any size of CORE_ADDR. */
1977 text_addr
= data_addr
= bss_addr
= 0;
1981 if (strncmp (ptr
, "Text=", 5) == 0)
1984 /* Don't use strtol, could lose on big values. */
1985 while (*ptr
&& *ptr
!= ';')
1986 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
1991 if (!lose
&& strncmp (ptr
, ";Data=", 6) == 0)
1994 while (*ptr
&& *ptr
!= ';')
1995 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2000 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2003 while (*ptr
&& *ptr
!= ';')
2004 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2010 error (_("Malformed response to offset query, %s"), buf
);
2012 if (symfile_objfile
== NULL
)
2015 offs
= ((struct section_offsets
*)
2016 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2017 memcpy (offs
, symfile_objfile
->section_offsets
,
2018 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2020 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2022 /* This is a temporary kludge to force data and bss to use the same offsets
2023 because that's what nlmconv does now. The real solution requires changes
2024 to the stub and remote.c that I don't have time to do right now. */
2026 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2027 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2029 objfile_relocate (symfile_objfile
, offs
);
2032 /* Stub for catch_errors. */
2035 remote_start_remote_dummy (struct ui_out
*uiout
, void *dummy
)
2037 start_remote (); /* Initialize gdb process mechanisms. */
2038 /* NOTE: Return something >=0. A -ve value is reserved for
2039 catch_exceptions. */
2044 remote_start_remote (struct ui_out
*uiout
, void *dummy
)
2046 immediate_quit
++; /* Allow user to interrupt it. */
2048 /* Ack any packet which the remote side has already sent. */
2049 serial_write (remote_desc
, "+", 1);
2051 /* Let the stub know that we want it to return the thread. */
2054 inferior_ptid
= remote_current_thread (inferior_ptid
);
2056 get_offsets (); /* Get text, data & bss offsets. */
2058 putpkt ("?"); /* Initiate a query from remote machine. */
2061 remote_start_remote_dummy (uiout
, dummy
);
2064 /* Open a connection to a remote debugger.
2065 NAME is the filename used for communication. */
2068 remote_open (char *name
, int from_tty
)
2070 remote_open_1 (name
, from_tty
, &remote_ops
, 0, 0);
2073 /* Just like remote_open, but with asynchronous support. */
2075 remote_async_open (char *name
, int from_tty
)
2077 remote_open_1 (name
, from_tty
, &remote_async_ops
, 0, 1);
2080 /* Open a connection to a remote debugger using the extended
2081 remote gdb protocol. NAME is the filename used for communication. */
2084 extended_remote_open (char *name
, int from_tty
)
2086 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */,
2090 /* Just like extended_remote_open, but with asynchronous support. */
2092 extended_remote_async_open (char *name
, int from_tty
)
2094 remote_open_1 (name
, from_tty
, &extended_async_remote_ops
,
2095 1 /*extended_p */, 1 /* async_p */);
2098 /* Generic code for opening a connection to a remote target. */
2101 init_all_packet_configs (void)
2104 update_packet_config (&remote_protocol_P
);
2105 update_packet_config (&remote_protocol_p
);
2106 update_packet_config (&remote_protocol_qSymbol
);
2107 update_packet_config (&remote_protocol_vcont
);
2108 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2109 update_packet_config (&remote_protocol_Z
[i
]);
2110 /* Force remote_write_bytes to check whether target supports binary
2112 update_packet_config (&remote_protocol_binary_download
);
2113 update_packet_config (&remote_protocol_qPart_auxv
);
2116 /* Symbol look-up. */
2119 remote_check_symbols (struct objfile
*objfile
)
2121 struct remote_state
*rs
= get_remote_state ();
2122 char *msg
, *reply
, *tmp
;
2123 struct minimal_symbol
*sym
;
2126 if (remote_protocol_qSymbol
.support
== PACKET_DISABLE
)
2129 msg
= alloca (rs
->remote_packet_size
);
2130 reply
= alloca (rs
->remote_packet_size
);
2132 /* Invite target to request symbol lookups. */
2134 putpkt ("qSymbol::");
2135 getpkt (reply
, (rs
->remote_packet_size
), 0);
2136 packet_ok (reply
, &remote_protocol_qSymbol
);
2138 while (strncmp (reply
, "qSymbol:", 8) == 0)
2141 end
= hex2bin (tmp
, msg
, strlen (tmp
) / 2);
2143 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2145 sprintf (msg
, "qSymbol::%s", &reply
[8]);
2147 sprintf (msg
, "qSymbol:%s:%s",
2148 paddr_nz (SYMBOL_VALUE_ADDRESS (sym
)),
2151 getpkt (reply
, (rs
->remote_packet_size
), 0);
2155 static struct serial
*
2156 remote_serial_open (char *name
)
2158 static int udp_warning
= 0;
2160 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2161 of in ser-tcp.c, because it is the remote protocol assuming that the
2162 serial connection is reliable and not the serial connection promising
2164 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2167 The remote protocol may be unreliable over UDP.\n\
2168 Some events may be lost, rendering further debugging impossible."));
2172 return serial_open (name
);
2176 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
,
2177 int extended_p
, int async_p
)
2179 struct exception ex
;
2180 struct remote_state
*rs
= get_remote_state ();
2182 error (_("To open a remote debug connection, you need to specify what\n"
2183 "serial device is attached to the remote system\n"
2184 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
2186 /* See FIXME above. */
2188 wait_forever_enabled_p
= 1;
2190 reopen_exec_file ();
2193 target_preopen (from_tty
);
2195 unpush_target (target
);
2197 remote_desc
= remote_serial_open (name
);
2199 perror_with_name (name
);
2201 if (baud_rate
!= -1)
2203 if (serial_setbaudrate (remote_desc
, baud_rate
))
2205 /* The requested speed could not be set. Error out to
2206 top level after closing remote_desc. Take care to
2207 set remote_desc to NULL to avoid closing remote_desc
2209 serial_close (remote_desc
);
2211 perror_with_name (name
);
2215 serial_raw (remote_desc
);
2217 /* If there is something sitting in the buffer we might take it as a
2218 response to a command, which would be bad. */
2219 serial_flush_input (remote_desc
);
2223 puts_filtered ("Remote debugging using ");
2224 puts_filtered (name
);
2225 puts_filtered ("\n");
2227 push_target (target
); /* Switch to using remote target now. */
2229 init_all_packet_configs ();
2231 general_thread
= -2;
2232 continue_thread
= -2;
2234 /* Probe for ability to use "ThreadInfo" query, as required. */
2235 use_threadinfo_query
= 1;
2236 use_threadextra_query
= 1;
2238 /* Without this, some commands which require an active target (such
2239 as kill) won't work. This variable serves (at least) double duty
2240 as both the pid of the target process (if it has such), and as a
2241 flag indicating that a target is active. These functions should
2242 be split out into seperate variables, especially since GDB will
2243 someday have a notion of debugging several processes. */
2245 inferior_ptid
= pid_to_ptid (MAGIC_NULL_PID
);
2249 /* With this target we start out by owning the terminal. */
2250 remote_async_terminal_ours_p
= 1;
2252 /* FIXME: cagney/1999-09-23: During the initial connection it is
2253 assumed that the target is already ready and able to respond to
2254 requests. Unfortunately remote_start_remote() eventually calls
2255 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
2256 around this. Eventually a mechanism that allows
2257 wait_for_inferior() to expect/get timeouts will be
2259 wait_forever_enabled_p
= 0;
2262 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2263 /* First delete any symbols previously loaded from shared libraries. */
2264 no_shared_libraries (NULL
, 0);
2267 /* Start the remote connection. If error() or QUIT, discard this
2268 target (we'd otherwise be in an inconsistent state) and then
2269 propogate the error on up the exception chain. This ensures that
2270 the caller doesn't stumble along blindly assuming that the
2271 function succeeded. The CLI doesn't have this problem but other
2272 UI's, such as MI do.
2274 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
2275 this function should return an error indication letting the
2276 caller restore the previous state. Unfortunately the command
2277 ``target remote'' is directly wired to this function making that
2278 impossible. On a positive note, the CLI side of this problem has
2279 been fixed - the function set_cmd_context() makes it possible for
2280 all the ``target ....'' commands to share a common callback
2281 function. See cli-dump.c. */
2282 ex
= catch_exception (uiout
, remote_start_remote
, NULL
, RETURN_MASK_ALL
);
2287 wait_forever_enabled_p
= 1;
2288 throw_exception (ex
);
2292 wait_forever_enabled_p
= 1;
2296 /* Tell the remote that we are using the extended protocol. */
2297 char *buf
= alloca (rs
->remote_packet_size
);
2299 getpkt (buf
, (rs
->remote_packet_size
), 0);
2301 #ifdef SOLIB_CREATE_INFERIOR_HOOK
2302 /* FIXME: need a master target_open vector from which all
2303 remote_opens can be called, so that stuff like this can
2304 go there. Failing that, the following code must be copied
2305 to the open function for any remote target that wants to
2306 support svr4 shared libraries. */
2308 /* Set up to detect and load shared libraries. */
2309 if (exec_bfd
) /* No use without an exec file. */
2311 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
2312 remote_check_symbols (symfile_objfile
);
2317 /* This takes a program previously attached to and detaches it. After
2318 this is done, GDB can be used to debug some other program. We
2319 better not have left any breakpoints in the target program or it'll
2320 die when it hits one. */
2323 remote_detach (char *args
, int from_tty
)
2325 struct remote_state
*rs
= get_remote_state ();
2326 char *buf
= alloca (rs
->remote_packet_size
);
2329 error (_("Argument given to \"detach\" when remotely debugging."));
2331 /* Tell the remote target to detach. */
2333 remote_send (buf
, (rs
->remote_packet_size
));
2335 /* Unregister the file descriptor from the event loop. */
2336 if (target_is_async_p ())
2337 serial_async (remote_desc
, NULL
, 0);
2339 target_mourn_inferior ();
2341 puts_filtered ("Ending remote debugging.\n");
2344 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
2347 remote_disconnect (char *args
, int from_tty
)
2349 struct remote_state
*rs
= get_remote_state ();
2350 char *buf
= alloca (rs
->remote_packet_size
);
2353 error (_("Argument given to \"detach\" when remotely debugging."));
2355 /* Unregister the file descriptor from the event loop. */
2356 if (target_is_async_p ())
2357 serial_async (remote_desc
, NULL
, 0);
2359 target_mourn_inferior ();
2361 puts_filtered ("Ending remote debugging.\n");
2364 /* Convert hex digit A to a number. */
2369 if (a
>= '0' && a
<= '9')
2371 else if (a
>= 'a' && a
<= 'f')
2372 return a
- 'a' + 10;
2373 else if (a
>= 'A' && a
<= 'F')
2374 return a
- 'A' + 10;
2376 error (_("Reply contains invalid hex digit %d"), a
);
2380 hex2bin (const char *hex
, char *bin
, int count
)
2384 for (i
= 0; i
< count
; i
++)
2386 if (hex
[0] == 0 || hex
[1] == 0)
2388 /* Hex string is short, or of uneven length.
2389 Return the count that has been converted so far. */
2392 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
2398 /* Convert number NIB to a hex digit. */
2406 return 'a' + nib
- 10;
2410 bin2hex (const char *bin
, char *hex
, int count
)
2413 /* May use a length, or a nul-terminated string as input. */
2415 count
= strlen (bin
);
2417 for (i
= 0; i
< count
; i
++)
2419 *hex
++ = tohex ((*bin
>> 4) & 0xf);
2420 *hex
++ = tohex (*bin
++ & 0xf);
2426 /* Check for the availability of vCont. This function should also check
2430 remote_vcont_probe (struct remote_state
*rs
, char *buf
)
2432 strcpy (buf
, "vCont?");
2434 getpkt (buf
, rs
->remote_packet_size
, 0);
2436 /* Make sure that the features we assume are supported. */
2437 if (strncmp (buf
, "vCont", 5) == 0)
2440 int support_s
, support_S
, support_c
, support_C
;
2446 while (p
&& *p
== ';')
2449 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2451 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2453 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2455 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
2458 p
= strchr (p
, ';');
2461 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
2462 BUF will make packet_ok disable the packet. */
2463 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
2467 packet_ok (buf
, &remote_protocol_vcont
);
2470 /* Resume the remote inferior by using a "vCont" packet. The thread
2471 to be resumed is PTID; STEP and SIGGNAL indicate whether the
2472 resumed thread should be single-stepped and/or signalled. If PTID's
2473 PID is -1, then all threads are resumed; the thread to be stepped and/or
2474 signalled is given in the global INFERIOR_PTID. This function returns
2475 non-zero iff it resumes the inferior.
2477 This function issues a strict subset of all possible vCont commands at the
2481 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2483 struct remote_state
*rs
= get_remote_state ();
2484 int pid
= PIDGET (ptid
);
2485 char *buf
= NULL
, *outbuf
;
2486 struct cleanup
*old_cleanup
;
2488 buf
= xmalloc (rs
->remote_packet_size
);
2489 old_cleanup
= make_cleanup (xfree
, buf
);
2491 if (remote_protocol_vcont
.support
== PACKET_SUPPORT_UNKNOWN
)
2492 remote_vcont_probe (rs
, buf
);
2494 if (remote_protocol_vcont
.support
== PACKET_DISABLE
)
2496 do_cleanups (old_cleanup
);
2500 /* If we could generate a wider range of packets, we'd have to worry
2501 about overflowing BUF. Should there be a generic
2502 "multi-part-packet" packet? */
2504 if (PIDGET (inferior_ptid
) == MAGIC_NULL_PID
)
2506 /* MAGIC_NULL_PTID means that we don't have any active threads, so we
2507 don't have any PID numbers the inferior will understand. Make sure
2508 to only send forms that do not specify a PID. */
2509 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2510 outbuf
= xstrprintf ("vCont;S%02x", siggnal
);
2512 outbuf
= xstrprintf ("vCont;s");
2513 else if (siggnal
!= TARGET_SIGNAL_0
)
2514 outbuf
= xstrprintf ("vCont;C%02x", siggnal
);
2516 outbuf
= xstrprintf ("vCont;c");
2520 /* Resume all threads, with preference for INFERIOR_PTID. */
2521 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2522 outbuf
= xstrprintf ("vCont;S%02x:%x;c", siggnal
,
2523 PIDGET (inferior_ptid
));
2525 outbuf
= xstrprintf ("vCont;s:%x;c", PIDGET (inferior_ptid
));
2526 else if (siggnal
!= TARGET_SIGNAL_0
)
2527 outbuf
= xstrprintf ("vCont;C%02x:%x;c", siggnal
,
2528 PIDGET (inferior_ptid
));
2530 outbuf
= xstrprintf ("vCont;c");
2534 /* Scheduler locking; resume only PTID. */
2535 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
2536 outbuf
= xstrprintf ("vCont;S%02x:%x", siggnal
, pid
);
2538 outbuf
= xstrprintf ("vCont;s:%x", pid
);
2539 else if (siggnal
!= TARGET_SIGNAL_0
)
2540 outbuf
= xstrprintf ("vCont;C%02x:%x", siggnal
, pid
);
2542 outbuf
= xstrprintf ("vCont;c:%x", pid
);
2545 gdb_assert (outbuf
&& strlen (outbuf
) < rs
->remote_packet_size
);
2546 make_cleanup (xfree
, outbuf
);
2550 do_cleanups (old_cleanup
);
2555 /* Tell the remote machine to resume. */
2557 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
2559 static int last_sent_step
;
2562 remote_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2564 struct remote_state
*rs
= get_remote_state ();
2565 char *buf
= alloca (rs
->remote_packet_size
);
2566 int pid
= PIDGET (ptid
);
2569 last_sent_signal
= siggnal
;
2570 last_sent_step
= step
;
2572 /* A hook for when we need to do something at the last moment before
2574 if (deprecated_target_resume_hook
)
2575 (*deprecated_target_resume_hook
) ();
2577 /* The vCont packet doesn't need to specify threads via Hc. */
2578 if (remote_vcont_resume (ptid
, step
, siggnal
))
2581 /* All other supported resume packets do use Hc, so call set_thread. */
2583 set_thread (0, 0); /* Run any thread. */
2585 set_thread (pid
, 0); /* Run this thread. */
2587 if (siggnal
!= TARGET_SIGNAL_0
)
2589 buf
[0] = step
? 'S' : 'C';
2590 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
2591 buf
[2] = tohex (((int) siggnal
) & 0xf);
2595 strcpy (buf
, step
? "s" : "c");
2600 /* Same as remote_resume, but with async support. */
2602 remote_async_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
2604 remote_resume (ptid
, step
, siggnal
);
2606 /* We are about to start executing the inferior, let's register it
2607 with the event loop. NOTE: this is the one place where all the
2608 execution commands end up. We could alternatively do this in each
2609 of the execution commands in infcmd.c. */
2610 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
2611 into infcmd.c in order to allow inferior function calls to work
2612 NOT asynchronously. */
2613 if (target_can_async_p ())
2614 target_async (inferior_event_handler
, 0);
2615 /* Tell the world that the target is now executing. */
2616 /* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
2617 this? Instead, should the client of target just assume (for
2618 async targets) that the target is going to start executing? Is
2619 this information already found in the continuation block? */
2620 if (target_is_async_p ())
2621 target_executing
= 1;
2625 /* Set up the signal handler for SIGINT, while the target is
2626 executing, ovewriting the 'regular' SIGINT signal handler. */
2628 initialize_sigint_signal_handler (void)
2630 sigint_remote_token
=
2631 create_async_signal_handler (async_remote_interrupt
, NULL
);
2632 signal (SIGINT
, handle_remote_sigint
);
2635 /* Signal handler for SIGINT, while the target is executing. */
2637 handle_remote_sigint (int sig
)
2639 signal (sig
, handle_remote_sigint_twice
);
2640 sigint_remote_twice_token
=
2641 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
2642 mark_async_signal_handler_wrapper (sigint_remote_token
);
2645 /* Signal handler for SIGINT, installed after SIGINT has already been
2646 sent once. It will take effect the second time that the user sends
2649 handle_remote_sigint_twice (int sig
)
2651 signal (sig
, handle_sigint
);
2652 sigint_remote_twice_token
=
2653 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
2654 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
2657 /* Perform the real interruption of the target execution, in response
2660 async_remote_interrupt (gdb_client_data arg
)
2663 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2668 /* Perform interrupt, if the first attempt did not succeed. Just give
2669 up on the target alltogether. */
2671 async_remote_interrupt_twice (gdb_client_data arg
)
2674 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
2675 /* Do something only if the target was not killed by the previous
2677 if (target_executing
)
2680 signal (SIGINT
, handle_remote_sigint
);
2684 /* Reinstall the usual SIGINT handlers, after the target has
2687 cleanup_sigint_signal_handler (void *dummy
)
2689 signal (SIGINT
, handle_sigint
);
2690 if (sigint_remote_twice_token
)
2691 delete_async_signal_handler ((struct async_signal_handler
**)
2692 &sigint_remote_twice_token
);
2693 if (sigint_remote_token
)
2694 delete_async_signal_handler ((struct async_signal_handler
**)
2695 &sigint_remote_token
);
2698 /* Send ^C to target to halt it. Target will respond, and send us a
2700 static void (*ofunc
) (int);
2702 /* The command line interface's stop routine. This function is installed
2703 as a signal handler for SIGINT. The first time a user requests a
2704 stop, we call remote_stop to send a break or ^C. If there is no
2705 response from the target (it didn't stop when the user requested it),
2706 we ask the user if he'd like to detach from the target. */
2708 remote_interrupt (int signo
)
2710 /* If this doesn't work, try more severe steps. */
2711 signal (signo
, remote_interrupt_twice
);
2714 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
2719 /* The user typed ^C twice. */
2722 remote_interrupt_twice (int signo
)
2724 signal (signo
, ofunc
);
2726 signal (signo
, remote_interrupt
);
2729 /* This is the generic stop called via the target vector. When a target
2730 interrupt is requested, either by the command line or the GUI, we
2731 will eventually end up here. */
2735 /* Send a break or a ^C, depending on user preference. */
2737 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
2740 serial_send_break (remote_desc
);
2742 serial_write (remote_desc
, "\003", 1);
2745 /* Ask the user what to do when an interrupt is received. */
2748 interrupt_query (void)
2750 target_terminal_ours ();
2752 if (query ("Interrupted while waiting for the program.\n\
2753 Give up (and stop debugging it)? "))
2755 target_mourn_inferior ();
2756 deprecated_throw_reason (RETURN_QUIT
);
2759 target_terminal_inferior ();
2762 /* Enable/disable target terminal ownership. Most targets can use
2763 terminal groups to control terminal ownership. Remote targets are
2764 different in that explicit transfer of ownership to/from GDB/target
2768 remote_async_terminal_inferior (void)
2770 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
2771 sync_execution here. This function should only be called when
2772 GDB is resuming the inferior in the forground. A background
2773 resume (``run&'') should leave GDB in control of the terminal and
2774 consequently should not call this code. */
2775 if (!sync_execution
)
2777 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
2778 calls target_terminal_*() idenpotent. The event-loop GDB talking
2779 to an asynchronous target with a synchronous command calls this
2780 function from both event-top.c and infrun.c/infcmd.c. Once GDB
2781 stops trying to transfer the terminal to the target when it
2782 shouldn't this guard can go away. */
2783 if (!remote_async_terminal_ours_p
)
2785 delete_file_handler (input_fd
);
2786 remote_async_terminal_ours_p
= 0;
2787 initialize_sigint_signal_handler ();
2788 /* NOTE: At this point we could also register our selves as the
2789 recipient of all input. Any characters typed could then be
2790 passed on down to the target. */
2794 remote_async_terminal_ours (void)
2796 /* See FIXME in remote_async_terminal_inferior. */
2797 if (!sync_execution
)
2799 /* See FIXME in remote_async_terminal_inferior. */
2800 if (remote_async_terminal_ours_p
)
2802 cleanup_sigint_signal_handler (NULL
);
2803 add_file_handler (input_fd
, stdin_event_handler
, 0);
2804 remote_async_terminal_ours_p
= 1;
2807 /* If nonzero, ignore the next kill. */
2812 remote_console_output (char *msg
)
2816 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
2819 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
2822 fputs_unfiltered (tb
, gdb_stdtarg
);
2824 gdb_flush (gdb_stdtarg
);
2827 /* Wait until the remote machine stops, then return,
2828 storing status in STATUS just as `wait' would.
2829 Returns "pid", which in the case of a multi-threaded
2830 remote OS, is the thread-id. */
2833 remote_wait (ptid_t ptid
, struct target_waitstatus
*status
)
2835 struct remote_state
*rs
= get_remote_state ();
2836 unsigned char *buf
= alloca (rs
->remote_packet_size
);
2837 ULONGEST thread_num
= -1;
2840 status
->kind
= TARGET_WAITKIND_EXITED
;
2841 status
->value
.integer
= 0;
2847 ofunc
= signal (SIGINT
, remote_interrupt
);
2848 getpkt (buf
, (rs
->remote_packet_size
), 1);
2849 signal (SIGINT
, ofunc
);
2851 /* This is a hook for when we need to do something (perhaps the
2852 collection of trace data) every time the target stops. */
2853 if (deprecated_target_wait_loop_hook
)
2854 (*deprecated_target_wait_loop_hook
) ();
2856 remote_stopped_by_watchpoint_p
= 0;
2860 case 'E': /* Error of some sort. */
2861 warning (_("Remote failure reply: %s"), buf
);
2863 case 'F': /* File-I/O request. */
2864 remote_fileio_request (buf
);
2866 case 'T': /* Status with PC, SP, FP, ... */
2869 char regs
[MAX_REGISTER_SIZE
];
2871 /* Expedited reply, containing Signal, {regno, reg} repeat. */
2872 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
2874 n... = register number
2875 r... = register contents
2877 p
= &buf
[3]; /* after Txx */
2886 /* If the packet contains a register number save it in
2887 pnum and set p1 to point to the character following
2888 it. Otherwise p1 points to p. */
2890 /* If this packet is an awatch packet, don't parse the
2891 'a' as a register number. */
2893 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
2895 /* Read the ``P'' register number. */
2896 pnum
= strtol (p
, &p_temp
, 16);
2897 p1
= (unsigned char *) p_temp
;
2902 if (p1
== p
) /* No register number present here. */
2904 p1
= (unsigned char *) strchr (p
, ':');
2906 warning (_("Malformed packet(a) (missing colon): %s\n\
2909 if (strncmp (p
, "thread", p1
- p
) == 0)
2911 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
2912 record_currthread (thread_num
);
2913 p
= (unsigned char *) p_temp
;
2915 else if ((strncmp (p
, "watch", p1
- p
) == 0)
2916 || (strncmp (p
, "rwatch", p1
- p
) == 0)
2917 || (strncmp (p
, "awatch", p1
- p
) == 0))
2919 remote_stopped_by_watchpoint_p
= 1;
2920 p
= unpack_varlen_hex (++p1
, &addr
);
2921 remote_watch_data_address
= (CORE_ADDR
)addr
;
2925 /* Silently skip unknown optional info. */
2926 p_temp
= strchr (p1
+ 1, ';');
2928 p
= (unsigned char *) p_temp
;
2933 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
2937 error (_("Malformed packet(b) (missing colon): %s\n\
2942 error (_("Remote sent bad register number %s: %s\n\
2944 phex_nz (pnum
, 0), p
, buf
);
2946 fieldsize
= hex2bin (p
, regs
,
2947 register_size (current_gdbarch
,
2950 if (fieldsize
< register_size (current_gdbarch
,
2952 warning (_("Remote reply is too short: %s"), buf
);
2953 regcache_raw_supply (current_regcache
,
2958 error (_("Remote register badly formatted: %s\nhere: %s"),
2963 case 'S': /* Old style status, just signal only. */
2964 status
->kind
= TARGET_WAITKIND_STOPPED
;
2965 status
->value
.sig
= (enum target_signal
)
2966 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2970 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
2971 record_currthread (thread_num
);
2974 case 'W': /* Target exited. */
2976 /* The remote process exited. */
2977 status
->kind
= TARGET_WAITKIND_EXITED
;
2978 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
2982 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
2983 status
->value
.sig
= (enum target_signal
)
2984 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
2988 case 'O': /* Console output. */
2989 remote_console_output (buf
+ 1);
2992 if (last_sent_signal
!= TARGET_SIGNAL_0
)
2994 /* Zero length reply means that we tried 'S' or 'C' and
2995 the remote system doesn't support it. */
2996 target_terminal_ours_for_output ();
2998 ("Can't send signals to this remote system. %s not sent.\n",
2999 target_signal_to_name (last_sent_signal
));
3000 last_sent_signal
= TARGET_SIGNAL_0
;
3001 target_terminal_inferior ();
3003 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3004 putpkt ((char *) buf
);
3007 /* else fallthrough */
3009 warning (_("Invalid remote reply: %s"), buf
);
3014 if (thread_num
!= -1)
3016 return pid_to_ptid (thread_num
);
3018 return inferior_ptid
;
3021 /* Async version of remote_wait. */
3023 remote_async_wait (ptid_t ptid
, struct target_waitstatus
*status
)
3025 struct remote_state
*rs
= get_remote_state ();
3026 unsigned char *buf
= alloca (rs
->remote_packet_size
);
3027 ULONGEST thread_num
= -1;
3030 status
->kind
= TARGET_WAITKIND_EXITED
;
3031 status
->value
.integer
= 0;
3033 remote_stopped_by_watchpoint_p
= 0;
3039 if (!target_is_async_p ())
3040 ofunc
= signal (SIGINT
, remote_interrupt
);
3041 /* FIXME: cagney/1999-09-27: If we're in async mode we should
3042 _never_ wait for ever -> test on target_is_async_p().
3043 However, before we do that we need to ensure that the caller
3044 knows how to take the target into/out of async mode. */
3045 getpkt (buf
, (rs
->remote_packet_size
), wait_forever_enabled_p
);
3046 if (!target_is_async_p ())
3047 signal (SIGINT
, ofunc
);
3049 /* This is a hook for when we need to do something (perhaps the
3050 collection of trace data) every time the target stops. */
3051 if (deprecated_target_wait_loop_hook
)
3052 (*deprecated_target_wait_loop_hook
) ();
3056 case 'E': /* Error of some sort. */
3057 warning (_("Remote failure reply: %s"), buf
);
3059 case 'F': /* File-I/O request. */
3060 remote_fileio_request (buf
);
3062 case 'T': /* Status with PC, SP, FP, ... */
3065 char regs
[MAX_REGISTER_SIZE
];
3067 /* Expedited reply, containing Signal, {regno, reg} repeat. */
3068 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
3070 n... = register number
3071 r... = register contents
3073 p
= &buf
[3]; /* after Txx */
3082 /* If the packet contains a register number, save it
3083 in pnum and set p1 to point to the character
3084 following it. Otherwise p1 points to p. */
3086 /* If this packet is an awatch packet, don't parse the 'a'
3087 as a register number. */
3089 if (!strncmp (p
, "awatch", strlen ("awatch")) != 0)
3091 /* Read the register number. */
3092 pnum
= strtol (p
, &p_temp
, 16);
3093 p1
= (unsigned char *) p_temp
;
3098 if (p1
== p
) /* No register number present here. */
3100 p1
= (unsigned char *) strchr (p
, ':');
3102 error (_("Malformed packet(a) (missing colon): %s\n\
3105 if (strncmp (p
, "thread", p1
- p
) == 0)
3107 p_temp
= unpack_varlen_hex (++p1
, &thread_num
);
3108 record_currthread (thread_num
);
3109 p
= (unsigned char *) p_temp
;
3111 else if ((strncmp (p
, "watch", p1
- p
) == 0)
3112 || (strncmp (p
, "rwatch", p1
- p
) == 0)
3113 || (strncmp (p
, "awatch", p1
- p
) == 0))
3115 remote_stopped_by_watchpoint_p
= 1;
3116 p
= unpack_varlen_hex (++p1
, &addr
);
3117 remote_watch_data_address
= (CORE_ADDR
)addr
;
3121 /* Silently skip unknown optional info. */
3122 p_temp
= (unsigned char *) strchr (p1
+ 1, ';');
3130 struct packet_reg
*reg
= packet_reg_from_pnum (rs
, pnum
);
3133 error (_("Malformed packet(b) (missing colon): %s\n\
3138 error (_("Remote sent bad register number %ld: %s\n\
3142 fieldsize
= hex2bin (p
, regs
,
3143 register_size (current_gdbarch
,
3146 if (fieldsize
< register_size (current_gdbarch
,
3148 warning (_("Remote reply is too short: %s"), buf
);
3149 regcache_raw_supply (current_regcache
, reg
->regnum
, regs
);
3153 error (_("Remote register badly formatted: %s\nhere: %s"),
3158 case 'S': /* Old style status, just signal only. */
3159 status
->kind
= TARGET_WAITKIND_STOPPED
;
3160 status
->value
.sig
= (enum target_signal
)
3161 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3165 thread_num
= strtol ((const char *) &buf
[4], NULL
, 16);
3166 record_currthread (thread_num
);
3169 case 'W': /* Target exited. */
3171 /* The remote process exited. */
3172 status
->kind
= TARGET_WAITKIND_EXITED
;
3173 status
->value
.integer
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
3177 status
->kind
= TARGET_WAITKIND_SIGNALLED
;
3178 status
->value
.sig
= (enum target_signal
)
3179 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
3183 case 'O': /* Console output. */
3184 remote_console_output (buf
+ 1);
3185 /* Return immediately to the event loop. The event loop will
3186 still be waiting on the inferior afterwards. */
3187 status
->kind
= TARGET_WAITKIND_IGNORE
;
3190 if (last_sent_signal
!= TARGET_SIGNAL_0
)
3192 /* Zero length reply means that we tried 'S' or 'C' and
3193 the remote system doesn't support it. */
3194 target_terminal_ours_for_output ();
3196 ("Can't send signals to this remote system. %s not sent.\n",
3197 target_signal_to_name (last_sent_signal
));
3198 last_sent_signal
= TARGET_SIGNAL_0
;
3199 target_terminal_inferior ();
3201 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
3202 putpkt ((char *) buf
);
3205 /* else fallthrough */
3207 warning (_("Invalid remote reply: %s"), buf
);
3212 if (thread_num
!= -1)
3214 return pid_to_ptid (thread_num
);
3216 return inferior_ptid
;
3219 /* Number of bytes of registers this stub implements. */
3221 static int register_bytes_found
;
3223 /* Read the remote registers into the block REGS. */
3224 /* Currently we just read all the registers, so we don't use regnum. */
3227 fetch_register_using_p (int regnum
)
3229 struct remote_state
*rs
= get_remote_state ();
3230 char *buf
= alloca (rs
->remote_packet_size
), *p
;
3231 char regp
[MAX_REGISTER_SIZE
];
3236 p
+= hexnumstr (p
, regnum
);
3238 remote_send (buf
, rs
->remote_packet_size
);
3240 /* If the stub didn't recognize the packet, or if we got an error,
3242 if (buf
[0] == '\0' || buf
[0] == 'E')
3245 /* If this register is unfetchable, tell the regcache. */
3248 regcache_raw_supply (current_regcache
, regnum
, NULL
);
3249 set_register_cached (regnum
, -1);
3253 /* Otherwise, parse and supply the value. */
3260 error (_("fetch_register_using_p: early buf termination"));
3264 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3267 regcache_raw_supply (current_regcache
, regnum
, regp
);
3272 remote_fetch_registers (int regnum
)
3274 struct remote_state
*rs
= get_remote_state ();
3275 char *buf
= alloca (rs
->remote_packet_size
);
3278 char *regs
= alloca (rs
->sizeof_g_packet
);
3280 set_thread (PIDGET (inferior_ptid
), 1);
3284 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3285 gdb_assert (reg
!= NULL
);
3286 if (!reg
->in_g_packet
)
3287 internal_error (__FILE__
, __LINE__
,
3288 _("Attempt to fetch a non G-packet register when this "
3289 "remote.c does not support the p-packet."));
3291 switch (remote_protocol_p
.support
)
3293 case PACKET_DISABLE
:
3296 if (fetch_register_using_p (regnum
))
3299 error (_("Protocol error: p packet not recognized by stub"));
3300 case PACKET_SUPPORT_UNKNOWN
:
3301 if (fetch_register_using_p (regnum
))
3303 /* The stub recognized the 'p' packet. Remember this. */
3304 remote_protocol_p
.support
= PACKET_ENABLE
;
3309 /* The stub does not support the 'P' packet. Use 'G'
3310 instead, and don't try using 'P' in the future (it
3311 will just waste our time). */
3312 remote_protocol_p
.support
= PACKET_DISABLE
;
3318 remote_send (buf
, (rs
->remote_packet_size
));
3320 /* Save the size of the packet sent to us by the target. Its used
3321 as a heuristic when determining the max size of packets that the
3322 target can safely receive. */
3323 if ((rs
->actual_register_packet_size
) == 0)
3324 (rs
->actual_register_packet_size
) = strlen (buf
);
3326 /* Unimplemented registers read as all bits zero. */
3327 memset (regs
, 0, rs
->sizeof_g_packet
);
3329 /* We can get out of synch in various cases. If the first character
3330 in the buffer is not a hex character, assume that has happened
3331 and try to fetch another packet to read. */
3332 while ((buf
[0] < '0' || buf
[0] > '9')
3333 && (buf
[0] < 'a' || buf
[0] > 'f')
3334 && buf
[0] != 'x') /* New: unavailable register value. */
3337 fprintf_unfiltered (gdb_stdlog
,
3338 "Bad register packet; fetching a new packet\n");
3339 getpkt (buf
, (rs
->remote_packet_size
), 0);
3342 /* Reply describes registers byte by byte, each byte encoded as two
3343 hex characters. Suck them all up, then supply them to the
3344 register cacheing/storage mechanism. */
3347 for (i
= 0; i
< rs
->sizeof_g_packet
; i
++)
3353 warning (_("Remote reply is of odd length: %s"), buf
);
3354 /* Don't change register_bytes_found in this case, and don't
3355 print a second warning. */
3358 if (p
[0] == 'x' && p
[1] == 'x')
3359 regs
[i
] = 0; /* 'x' */
3361 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
3365 if (i
!= register_bytes_found
)
3367 register_bytes_found
= i
;
3368 if (REGISTER_BYTES_OK_P ()
3369 && !REGISTER_BYTES_OK (i
))
3370 warning (_("Remote reply is too short: %s"), buf
);
3376 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3378 struct packet_reg
*r
= &rs
->regs
[i
];
3381 if (r
->offset
* 2 >= strlen (buf
))
3382 /* A short packet that didn't include the register's
3383 value, this implies that the register is zero (and
3384 not that the register is unavailable). Supply that
3386 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3387 else if (buf
[r
->offset
* 2] == 'x')
3389 gdb_assert (r
->offset
* 2 < strlen (buf
));
3390 /* The register isn't available, mark it as such (at
3391 the same time setting the value to zero). */
3392 regcache_raw_supply (current_regcache
, r
->regnum
, NULL
);
3393 set_register_cached (i
, -1);
3396 regcache_raw_supply (current_regcache
, r
->regnum
,
3403 /* Prepare to store registers. Since we may send them all (using a
3404 'G' request), we have to read out the ones we don't want to change
3408 remote_prepare_to_store (void)
3410 struct remote_state
*rs
= get_remote_state ();
3412 char buf
[MAX_REGISTER_SIZE
];
3414 /* Make sure the entire registers array is valid. */
3415 switch (remote_protocol_P
.support
)
3417 case PACKET_DISABLE
:
3418 case PACKET_SUPPORT_UNKNOWN
:
3419 /* Make sure all the necessary registers are cached. */
3420 for (i
= 0; i
< NUM_REGS
; i
++)
3421 if (rs
->regs
[i
].in_g_packet
)
3422 regcache_raw_read (current_regcache
, rs
->regs
[i
].regnum
, buf
);
3429 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
3430 packet was not recognized. */
3433 store_register_using_P (int regnum
)
3435 struct remote_state
*rs
= get_remote_state ();
3436 struct packet_reg
*reg
= packet_reg_from_regnum (rs
, regnum
);
3437 /* Try storing a single register. */
3438 char *buf
= alloca (rs
->remote_packet_size
);
3439 char regp
[MAX_REGISTER_SIZE
];
3443 sprintf (buf
, "P%s=", phex_nz (reg
->pnum
, 0));
3444 p
= buf
+ strlen (buf
);
3445 regcache_raw_collect (current_regcache
, reg
->regnum
, regp
);
3446 bin2hex (regp
, p
, register_size (current_gdbarch
, reg
->regnum
));
3447 remote_send (buf
, rs
->remote_packet_size
);
3449 return buf
[0] != '\0';
3453 /* Store register REGNUM, or all registers if REGNUM == -1, from the
3454 contents of the register cache buffer. FIXME: ignores errors. */
3457 remote_store_registers (int regnum
)
3459 struct remote_state
*rs
= get_remote_state ();
3465 set_thread (PIDGET (inferior_ptid
), 1);
3469 switch (remote_protocol_P
.support
)
3471 case PACKET_DISABLE
:
3474 if (store_register_using_P (regnum
))
3477 error (_("Protocol error: P packet not recognized by stub"));
3478 case PACKET_SUPPORT_UNKNOWN
:
3479 if (store_register_using_P (regnum
))
3481 /* The stub recognized the 'P' packet. Remember this. */
3482 remote_protocol_P
.support
= PACKET_ENABLE
;
3487 /* The stub does not support the 'P' packet. Use 'G'
3488 instead, and don't try using 'P' in the future (it
3489 will just waste our time). */
3490 remote_protocol_P
.support
= PACKET_DISABLE
;
3496 /* Extract all the registers in the regcache copying them into a
3500 regs
= alloca (rs
->sizeof_g_packet
);
3501 memset (regs
, rs
->sizeof_g_packet
, 0);
3502 for (i
= 0; i
< NUM_REGS
+ NUM_PSEUDO_REGS
; i
++)
3504 struct packet_reg
*r
= &rs
->regs
[i
];
3506 regcache_raw_collect (current_regcache
, r
->regnum
, regs
+ r
->offset
);
3510 /* Command describes registers byte by byte,
3511 each byte encoded as two hex characters. */
3512 buf
= alloca (rs
->remote_packet_size
);
3515 /* remote_prepare_to_store insures that register_bytes_found gets set. */
3516 bin2hex (regs
, p
, register_bytes_found
);
3517 remote_send (buf
, (rs
->remote_packet_size
));
3521 /* Return the number of hex digits in num. */
3524 hexnumlen (ULONGEST num
)
3528 for (i
= 0; num
!= 0; i
++)
3534 /* Set BUF to the minimum number of hex digits representing NUM. */
3537 hexnumstr (char *buf
, ULONGEST num
)
3539 int len
= hexnumlen (num
);
3540 return hexnumnstr (buf
, num
, len
);
3544 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
3547 hexnumnstr (char *buf
, ULONGEST num
, int width
)
3553 for (i
= width
- 1; i
>= 0; i
--)
3555 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
3562 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
3565 remote_address_masked (CORE_ADDR addr
)
3567 if (remote_address_size
> 0
3568 && remote_address_size
< (sizeof (ULONGEST
) * 8))
3570 /* Only create a mask when that mask can safely be constructed
3571 in a ULONGEST variable. */
3573 mask
= (mask
<< remote_address_size
) - 1;
3579 /* Determine whether the remote target supports binary downloading.
3580 This is accomplished by sending a no-op memory write of zero length
3581 to the target at the specified address. It does not suffice to send
3582 the whole packet, since many stubs strip the eighth bit and
3583 subsequently compute a wrong checksum, which causes real havoc with
3586 NOTE: This can still lose if the serial line is not eight-bit
3587 clean. In cases like this, the user should clear "remote
3591 check_binary_download (CORE_ADDR addr
)
3593 struct remote_state
*rs
= get_remote_state ();
3594 switch (remote_protocol_binary_download
.support
)
3596 case PACKET_DISABLE
:
3600 case PACKET_SUPPORT_UNKNOWN
:
3602 char *buf
= alloca (rs
->remote_packet_size
);
3607 p
+= hexnumstr (p
, (ULONGEST
) addr
);
3609 p
+= hexnumstr (p
, (ULONGEST
) 0);
3613 putpkt_binary (buf
, (int) (p
- buf
));
3614 getpkt (buf
, (rs
->remote_packet_size
), 0);
3619 fprintf_unfiltered (gdb_stdlog
,
3620 "binary downloading NOT suppported by target\n");
3621 remote_protocol_binary_download
.support
= PACKET_DISABLE
;
3626 fprintf_unfiltered (gdb_stdlog
,
3627 "binary downloading suppported by target\n");
3628 remote_protocol_binary_download
.support
= PACKET_ENABLE
;
3635 /* Write memory data directly to the remote machine.
3636 This does not inform the data cache; the data cache uses this.
3637 MEMADDR is the address in the remote memory space.
3638 MYADDR is the address of the buffer in our space.
3639 LEN is the number of bytes.
3641 Returns number of bytes transferred, or 0 (setting errno) for
3642 error. Only transfer a single packet. */
3645 remote_write_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3649 unsigned char *plen
;
3655 unsigned char *payload_start
;
3657 /* Verify that the target can support a binary download. */
3658 check_binary_download (memaddr
);
3660 /* Compute the size, and then allocate space for the largest
3661 possible packet. Include space for an extra trailing NULL. */
3662 sizeof_buf
= get_memory_write_packet_size () + 1;
3663 buf
= alloca (sizeof_buf
);
3665 /* Compute the size of the actual payload by subtracting out the
3666 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
3667 payload_size
= (get_memory_write_packet_size () - (strlen ("$M,:#NN")
3668 + hexnumlen (memaddr
)
3669 + hexnumlen (len
)));
3671 /* Construct the packet header: "[MX]<memaddr>,<len>:". */
3673 /* Append "[XM]". Compute a best guess of the number of bytes
3674 actually transfered. */
3676 switch (remote_protocol_binary_download
.support
)
3680 /* Best guess at number of bytes that will fit. */
3681 todo
= min (len
, payload_size
);
3683 case PACKET_DISABLE
:
3685 /* Num bytes that will fit. */
3686 todo
= min (len
, payload_size
/ 2);
3688 case PACKET_SUPPORT_UNKNOWN
:
3689 internal_error (__FILE__
, __LINE__
,
3690 _("remote_write_bytes: bad internal state"));
3692 internal_error (__FILE__
, __LINE__
, _("bad switch"));
3695 /* Append "<memaddr>". */
3696 memaddr
= remote_address_masked (memaddr
);
3697 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3702 /* Append <len>. Retain the location/size of <len>. It may need to
3703 be adjusted once the packet body has been created. */
3705 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
3712 /* Append the packet body. */
3714 switch (remote_protocol_binary_download
.support
)
3717 /* Binary mode. Send target system values byte by byte, in
3718 increasing byte addresses. Only escape certain critical
3721 (nr_bytes
< todo
) && (p
- payload_start
) < payload_size
;
3724 switch (myaddr
[nr_bytes
] & 0xff)
3729 /* These must be escaped. */
3731 *p
++ = (myaddr
[nr_bytes
] & 0xff) ^ 0x20;
3734 *p
++ = myaddr
[nr_bytes
] & 0xff;
3738 if (nr_bytes
< todo
)
3740 /* Escape chars have filled up the buffer prematurely,
3741 and we have actually sent fewer bytes than planned.
3742 Fix-up the length field of the packet. Use the same
3743 number of characters as before. */
3744 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
3745 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
3748 case PACKET_DISABLE
:
3749 /* Normal mode: Send target system values byte by byte, in
3750 increasing byte addresses. Each byte is encoded as a two hex
3752 nr_bytes
= bin2hex (myaddr
, p
, todo
);
3755 case PACKET_SUPPORT_UNKNOWN
:
3756 internal_error (__FILE__
, __LINE__
,
3757 _("remote_write_bytes: bad internal state"));
3759 internal_error (__FILE__
, __LINE__
, _("bad switch"));
3762 putpkt_binary (buf
, (int) (p
- buf
));
3763 getpkt (buf
, sizeof_buf
, 0);
3767 /* There is no correspondance between what the remote protocol
3768 uses for errors and errno codes. We would like a cleaner way
3769 of representing errors (big enough to include errno codes,
3770 bfd_error codes, and others). But for now just return EIO. */
3775 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
3776 fewer bytes than we'd planned. */
3780 /* Read memory data directly from the remote machine.
3781 This does not use the data cache; the data cache uses this.
3782 MEMADDR is the address in the remote memory space.
3783 MYADDR is the address of the buffer in our space.
3784 LEN is the number of bytes.
3786 Returns number of bytes transferred, or 0 for error. */
3788 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
3789 remote targets) shouldn't attempt to read the entire buffer.
3790 Instead it should read a single packet worth of data and then
3791 return the byte size of that packet to the caller. The caller (its
3792 caller and its callers caller ;-) already contains code for
3793 handling partial reads. */
3796 remote_read_bytes (CORE_ADDR memaddr
, char *myaddr
, int len
)
3799 int max_buf_size
; /* Max size of packet output buffer. */
3803 /* Create a buffer big enough for this packet. */
3804 max_buf_size
= get_memory_read_packet_size ();
3805 sizeof_buf
= max_buf_size
+ 1; /* Space for trailing NULL. */
3806 buf
= alloca (sizeof_buf
);
3815 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
3817 /* construct "m"<memaddr>","<len>" */
3818 /* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
3819 memaddr
= remote_address_masked (memaddr
);
3822 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
3824 p
+= hexnumstr (p
, (ULONGEST
) todo
);
3828 getpkt (buf
, sizeof_buf
, 0);
3831 && isxdigit (buf
[1]) && isxdigit (buf
[2])
3834 /* There is no correspondance between what the remote
3835 protocol uses for errors and errno codes. We would like
3836 a cleaner way of representing errors (big enough to
3837 include errno codes, bfd_error codes, and others). But
3838 for now just return EIO. */
3843 /* Reply describes memory byte by byte,
3844 each byte encoded as two hex characters. */
3847 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
3849 /* Reply is short. This means that we were able to read
3850 only part of what we wanted to. */
3851 return i
+ (origlen
- len
);
3860 /* Read or write LEN bytes from inferior memory at MEMADDR,
3861 transferring to or from debugger address BUFFER. Write to inferior
3862 if SHOULD_WRITE is nonzero. Returns length of data written or
3863 read; 0 for error. TARGET is unused. */
3866 remote_xfer_memory (CORE_ADDR mem_addr
, char *buffer
, int mem_len
,
3867 int should_write
, struct mem_attrib
*attrib
,
3868 struct target_ops
*target
)
3870 CORE_ADDR targ_addr
;
3874 /* Should this be the selected frame? */
3875 gdbarch_remote_translate_xfer_address (current_gdbarch
,
3878 &targ_addr
, &targ_len
);
3883 res
= remote_write_bytes (targ_addr
, buffer
, targ_len
);
3885 res
= remote_read_bytes (targ_addr
, buffer
, targ_len
);
3891 remote_files_info (struct target_ops
*ignore
)
3893 puts_filtered ("Debugging a target over a serial line.\n");
3896 /* Stuff for dealing with the packets which are part of this protocol.
3897 See comment at top of file for details. */
3899 /* Read a single character from the remote end, masking it down to 7
3903 readchar (int timeout
)
3907 ch
= serial_readchar (remote_desc
, timeout
);
3912 switch ((enum serial_rc
) ch
)
3915 target_mourn_inferior ();
3916 error (_("Remote connection closed"));
3919 perror_with_name (_("Remote communication error"));
3921 case SERIAL_TIMEOUT
:
3927 /* Send the command in BUF to the remote machine, and read the reply
3928 into BUF. Report an error if we get an error reply. */
3931 remote_send (char *buf
,
3935 getpkt (buf
, sizeof_buf
, 0);
3938 error (_("Remote failure reply: %s"), buf
);
3941 /* Display a null-terminated packet on stdout, for debugging, using C
3945 print_packet (char *buf
)
3947 puts_filtered ("\"");
3948 fputstr_filtered (buf
, '"', gdb_stdout
);
3949 puts_filtered ("\"");
3955 return putpkt_binary (buf
, strlen (buf
));
3958 /* Send a packet to the remote machine, with error checking. The data
3959 of the packet is in BUF. The string in BUF can be at most
3960 (rs->remote_packet_size) - 5 to account for the $, # and checksum,
3961 and for a possible /0 if we are debugging (remote_debug) and want
3962 to print the sent packet as a string. */
3965 putpkt_binary (char *buf
, int cnt
)
3967 struct remote_state
*rs
= get_remote_state ();
3969 unsigned char csum
= 0;
3970 char *buf2
= alloca (cnt
+ 6);
3971 long sizeof_junkbuf
= (rs
->remote_packet_size
);
3972 char *junkbuf
= alloca (sizeof_junkbuf
);
3978 /* Copy the packet into buffer BUF2, encapsulating it
3979 and giving it a checksum. */
3984 for (i
= 0; i
< cnt
; i
++)
3990 *p
++ = tohex ((csum
>> 4) & 0xf);
3991 *p
++ = tohex (csum
& 0xf);
3993 /* Send it over and over until we get a positive ack. */
3997 int started_error_output
= 0;
4002 fprintf_unfiltered (gdb_stdlog
, "Sending packet: ");
4003 fputstrn_unfiltered (buf2
, p
- buf2
, 0, gdb_stdlog
);
4004 fprintf_unfiltered (gdb_stdlog
, "...");
4005 gdb_flush (gdb_stdlog
);
4007 if (serial_write (remote_desc
, buf2
, p
- buf2
))
4008 perror_with_name (_("putpkt: write failed"));
4010 /* Read until either a timeout occurs (-2) or '+' is read. */
4013 ch
= readchar (remote_timeout
);
4021 case SERIAL_TIMEOUT
:
4023 if (started_error_output
)
4025 putchar_unfiltered ('\n');
4026 started_error_output
= 0;
4035 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
4039 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
4040 case SERIAL_TIMEOUT
:
4044 break; /* Retransmit buffer. */
4048 fprintf_unfiltered (gdb_stdlog
,
4049 "Packet instead of Ack, ignoring it\n");
4050 /* It's probably an old response sent because an ACK
4051 was lost. Gobble up the packet and ack it so it
4052 doesn't get retransmitted when we resend this
4054 read_frame (junkbuf
, sizeof_junkbuf
);
4055 serial_write (remote_desc
, "+", 1);
4056 continue; /* Now, go look for +. */
4061 if (!started_error_output
)
4063 started_error_output
= 1;
4064 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
4066 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
4070 break; /* Here to retransmit. */
4074 /* This is wrong. If doing a long backtrace, the user should be
4075 able to get out next time we call QUIT, without anything as
4076 violent as interrupt_query. If we want to provide a way out of
4077 here without getting to the next QUIT, it should be based on
4078 hitting ^C twice as in remote_wait. */
4088 /* Come here after finding the start of the frame. Collect the rest
4089 into BUF, verifying the checksum, length, and handling run-length
4090 compression. No more than sizeof_buf-1 characters are read so that
4091 the buffer can be NUL terminated.
4093 Returns -1 on error, number of characters in buffer (ignoring the
4094 trailing NULL) on success. (could be extended to return one of the
4095 SERIAL status indications). */
4098 read_frame (char *buf
,
4110 /* ASSERT (bc < sizeof_buf - 1) - space for trailing NULL. */
4111 c
= readchar (remote_timeout
);
4114 case SERIAL_TIMEOUT
:
4116 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
4120 fputs_filtered ("Saw new packet start in middle of old one\n",
4122 return -1; /* Start a new packet, count retries. */
4125 unsigned char pktcsum
;
4131 check_0
= readchar (remote_timeout
);
4133 check_1
= readchar (remote_timeout
);
4135 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
4138 fputs_filtered ("Timeout in checksum, retrying\n",
4142 else if (check_0
< 0 || check_1
< 0)
4145 fputs_filtered ("Communication error in checksum\n",
4150 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
4151 if (csum
== pktcsum
)
4156 fprintf_filtered (gdb_stdlog
,
4157 "Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
4159 fputs_filtered (buf
, gdb_stdlog
);
4160 fputs_filtered ("\n", gdb_stdlog
);
4162 /* Number of characters in buffer ignoring trailing
4166 case '*': /* Run length encoding. */
4171 c
= readchar (remote_timeout
);
4173 repeat
= c
- ' ' + 3; /* Compute repeat count. */
4175 /* The character before ``*'' is repeated. */
4177 if (repeat
> 0 && repeat
<= 255
4179 && bc
+ repeat
- 1 < sizeof_buf
- 1)
4181 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
4187 printf_filtered (_("Repeat count %d too large for buffer: "),
4189 puts_filtered (buf
);
4190 puts_filtered ("\n");
4194 if (bc
< sizeof_buf
- 1)
4202 puts_filtered ("Remote packet too long: ");
4203 puts_filtered (buf
);
4204 puts_filtered ("\n");
4211 /* Read a packet from the remote machine, with error checking, and
4212 store it in BUF. If FOREVER, wait forever rather than timing out;
4213 this is used (in synchronous mode) to wait for a target that is is
4214 executing user code to stop. */
4215 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
4216 don't have to change all the calls to getpkt to deal with the
4217 return value, because at the moment I don't know what the right
4218 thing to do it for those. */
4226 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
4230 /* Read a packet from the remote machine, with error checking, and
4231 store it in BUF. If FOREVER, wait forever rather than timing out;
4232 this is used (in synchronous mode) to wait for a target that is is
4233 executing user code to stop. If FOREVER == 0, this function is
4234 allowed to time out gracefully and return an indication of this to
4237 getpkt_sane (char *buf
,
4246 strcpy (buf
, "timeout");
4250 timeout
= watchdog
> 0 ? watchdog
: -1;
4254 timeout
= remote_timeout
;
4258 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
4260 /* This can loop forever if the remote side sends us characters
4261 continuously, but if it pauses, we'll get a zero from
4262 readchar because of timeout. Then we'll count that as a
4265 /* Note that we will only wait forever prior to the start of a
4266 packet. After that, we expect characters to arrive at a
4267 brisk pace. They should show up within remote_timeout
4272 c
= readchar (timeout
);
4274 if (c
== SERIAL_TIMEOUT
)
4276 if (forever
) /* Watchdog went off? Kill the target. */
4279 target_mourn_inferior ();
4280 error (_("Watchdog has expired. Target detached."));
4283 fputs_filtered ("Timed out.\n", gdb_stdlog
);
4289 /* We've found the start of a packet, now collect the data. */
4291 val
= read_frame (buf
, sizeof_buf
);
4297 fprintf_unfiltered (gdb_stdlog
, "Packet received: ");
4298 fputstr_unfiltered (buf
, 0, gdb_stdlog
);
4299 fprintf_unfiltered (gdb_stdlog
, "\n");
4301 serial_write (remote_desc
, "+", 1);
4305 /* Try the whole thing again. */
4307 serial_write (remote_desc
, "-", 1);
4310 /* We have tried hard enough, and just can't receive the packet.
4313 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
4314 serial_write (remote_desc
, "+", 1);
4321 /* For some mysterious reason, wait_for_inferior calls kill instead of
4322 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4326 target_mourn_inferior ();
4330 /* Use catch_errors so the user can quit from gdb even when we aren't on
4331 speaking terms with the remote system. */
4332 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4334 /* Don't wait for it to die. I'm not really sure it matters whether
4335 we do or not. For the existing stubs, kill is a noop. */
4336 target_mourn_inferior ();
4339 /* Async version of remote_kill. */
4341 remote_async_kill (void)
4343 /* Unregister the file descriptor from the event loop. */
4344 if (target_is_async_p ())
4345 serial_async (remote_desc
, NULL
, 0);
4347 /* For some mysterious reason, wait_for_inferior calls kill instead of
4348 mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
4352 target_mourn_inferior ();
4356 /* Use catch_errors so the user can quit from gdb even when we
4357 aren't on speaking terms with the remote system. */
4358 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
4360 /* Don't wait for it to die. I'm not really sure it matters whether
4361 we do or not. For the existing stubs, kill is a noop. */
4362 target_mourn_inferior ();
4368 remote_mourn_1 (&remote_ops
);
4372 remote_async_mourn (void)
4374 remote_mourn_1 (&remote_async_ops
);
4378 extended_remote_mourn (void)
4380 /* We do _not_ want to mourn the target like this; this will
4381 remove the extended remote target from the target stack,
4382 and the next time the user says "run" it'll fail.
4384 FIXME: What is the right thing to do here? */
4386 remote_mourn_1 (&extended_remote_ops
);
4390 /* Worker function for remote_mourn. */
4392 remote_mourn_1 (struct target_ops
*target
)
4394 unpush_target (target
);
4395 generic_mourn_inferior ();
4398 /* In the extended protocol we want to be able to do things like
4399 "run" and have them basically work as expected. So we need
4400 a special create_inferior function.
4402 FIXME: One day add support for changing the exec file
4403 we're debugging, arguments and an environment. */
4406 extended_remote_create_inferior (char *exec_file
, char *args
,
4407 char **env
, int from_tty
)
4409 /* Rip out the breakpoints; we'll reinsert them after restarting
4410 the remote server. */
4411 remove_breakpoints ();
4413 /* Now restart the remote server. */
4414 extended_remote_restart ();
4416 /* Now put the breakpoints back in. This way we're safe if the
4417 restart function works via a unix fork on the remote side. */
4418 insert_breakpoints ();
4420 /* Clean up from the last time we were running. */
4421 clear_proceed_status ();
4423 /* Let the remote process run. */
4424 proceed (-1, TARGET_SIGNAL_0
, 0);
4427 /* Async version of extended_remote_create_inferior. */
4429 extended_remote_async_create_inferior (char *exec_file
, char *args
,
4430 char **env
, int from_tty
)
4432 /* Rip out the breakpoints; we'll reinsert them after restarting
4433 the remote server. */
4434 remove_breakpoints ();
4436 /* If running asynchronously, register the target file descriptor
4437 with the event loop. */
4438 if (target_can_async_p ())
4439 target_async (inferior_event_handler
, 0);
4441 /* Now restart the remote server. */
4442 extended_remote_restart ();
4444 /* Now put the breakpoints back in. This way we're safe if the
4445 restart function works via a unix fork on the remote side. */
4446 insert_breakpoints ();
4448 /* Clean up from the last time we were running. */
4449 clear_proceed_status ();
4451 /* Let the remote process run. */
4452 proceed (-1, TARGET_SIGNAL_0
, 0);
4456 /* On some machines, e.g. 68k, we may use a different breakpoint
4457 instruction than other targets; in those use
4458 DEPRECATED_REMOTE_BREAKPOINT instead of just BREAKPOINT_FROM_PC.
4459 Also, bi-endian targets may define
4460 DEPRECATED_LITTLE_REMOTE_BREAKPOINT and
4461 DEPRECATED_BIG_REMOTE_BREAKPOINT. If none of these are defined, we
4462 just call the standard routines that are in mem-break.c. */
4464 /* NOTE: cagney/2003-06-08: This is silly. A remote and simulator
4465 target should use an identical BREAKPOINT_FROM_PC. As for native,
4466 the ARCH-OS-tdep.c code can override the default. */
4468 #if defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && defined (DEPRECATED_BIG_REMOTE_BREAKPOINT) && !defined(DEPRECATED_REMOTE_BREAKPOINT)
4469 #define DEPRECATED_REMOTE_BREAKPOINT
4472 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4474 /* If the target isn't bi-endian, just pretend it is. */
4475 #if !defined (DEPRECATED_LITTLE_REMOTE_BREAKPOINT) && !defined (DEPRECATED_BIG_REMOTE_BREAKPOINT)
4476 #define DEPRECATED_LITTLE_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4477 #define DEPRECATED_BIG_REMOTE_BREAKPOINT DEPRECATED_REMOTE_BREAKPOINT
4480 static unsigned char big_break_insn
[] = DEPRECATED_BIG_REMOTE_BREAKPOINT
;
4481 static unsigned char little_break_insn
[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT
;
4483 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4485 /* Insert a breakpoint on targets that don't have any better
4486 breakpoint support. We read the contents of the target location
4487 and stash it, then overwrite it with a breakpoint instruction.
4488 ADDR is the target location in the target machine. CONTENTS_CACHE
4489 is a pointer to memory allocated for saving the target contents.
4490 It is guaranteed by the caller to be long enough to save the number
4491 of bytes returned by BREAKPOINT_FROM_PC. */
4494 remote_insert_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4496 struct remote_state
*rs
= get_remote_state ();
4497 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4502 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
4503 If it succeeds, then set the support to PACKET_ENABLE. If it
4504 fails, and the user has explicitly requested the Z support then
4505 report an error, otherwise, mark it disabled and go on. */
4507 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4509 char *buf
= alloca (rs
->remote_packet_size
);
4512 addr
= remote_address_masked (addr
);
4516 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4517 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4518 sprintf (p
, ",%d", bp_size
);
4521 getpkt (buf
, (rs
->remote_packet_size
), 0);
4523 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
]))
4529 case PACKET_UNKNOWN
:
4534 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4535 val
= target_read_memory (addr
, contents_cache
, sizeof big_break_insn
);
4539 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
4540 val
= target_write_memory (addr
, (char *) big_break_insn
,
4541 sizeof big_break_insn
);
4543 val
= target_write_memory (addr
, (char *) little_break_insn
,
4544 sizeof little_break_insn
);
4549 return memory_insert_breakpoint (addr
, contents_cache
);
4550 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4554 remote_remove_breakpoint (CORE_ADDR addr
, char *contents_cache
)
4556 struct remote_state
*rs
= get_remote_state ();
4559 if (remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
].support
!= PACKET_DISABLE
)
4561 char *buf
= alloca (rs
->remote_packet_size
);
4568 addr
= remote_address_masked (addr
);
4569 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4570 BREAKPOINT_FROM_PC (&addr
, &bp_size
);
4571 sprintf (p
, ",%d", bp_size
);
4574 getpkt (buf
, (rs
->remote_packet_size
), 0);
4576 return (buf
[0] == 'E');
4579 #ifdef DEPRECATED_REMOTE_BREAKPOINT
4580 return target_write_memory (addr
, contents_cache
, sizeof big_break_insn
);
4582 return memory_remove_breakpoint (addr
, contents_cache
);
4583 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
4587 watchpoint_to_Z_packet (int type
)
4601 internal_error (__FILE__
, __LINE__
,
4602 _("hw_bp_to_z: bad watchpoint type %d"), type
);
4607 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
4609 struct remote_state
*rs
= get_remote_state ();
4610 char *buf
= alloca (rs
->remote_packet_size
);
4612 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4614 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4615 error (_("Can't set hardware watchpoints without the '%s' (%s) packet."),
4616 remote_protocol_Z
[packet
].name
,
4617 remote_protocol_Z
[packet
].title
);
4619 sprintf (buf
, "Z%x,", packet
);
4620 p
= strchr (buf
, '\0');
4621 addr
= remote_address_masked (addr
);
4622 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4623 sprintf (p
, ",%x", len
);
4626 getpkt (buf
, (rs
->remote_packet_size
), 0);
4628 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4631 case PACKET_UNKNOWN
:
4636 internal_error (__FILE__
, __LINE__
,
4637 _("remote_insert_watchpoint: reached end of function"));
4642 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
4644 struct remote_state
*rs
= get_remote_state ();
4645 char *buf
= alloca (rs
->remote_packet_size
);
4647 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
4649 if (remote_protocol_Z
[packet
].support
== PACKET_DISABLE
)
4650 error (_("Can't clear hardware watchpoints without the '%s' (%s) packet."),
4651 remote_protocol_Z
[packet
].name
,
4652 remote_protocol_Z
[packet
].title
);
4654 sprintf (buf
, "z%x,", packet
);
4655 p
= strchr (buf
, '\0');
4656 addr
= remote_address_masked (addr
);
4657 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4658 sprintf (p
, ",%x", len
);
4660 getpkt (buf
, (rs
->remote_packet_size
), 0);
4662 switch (packet_ok (buf
, &remote_protocol_Z
[packet
]))
4665 case PACKET_UNKNOWN
:
4670 internal_error (__FILE__
, __LINE__
,
4671 _("remote_remove_watchpoint: reached end of function"));
4675 int remote_hw_watchpoint_limit
= -1;
4676 int remote_hw_breakpoint_limit
= -1;
4679 remote_check_watch_resources (int type
, int cnt
, int ot
)
4681 if (type
== bp_hardware_breakpoint
)
4683 if (remote_hw_breakpoint_limit
== 0)
4685 else if (remote_hw_breakpoint_limit
< 0)
4687 else if (cnt
<= remote_hw_breakpoint_limit
)
4692 if (remote_hw_watchpoint_limit
== 0)
4694 else if (remote_hw_watchpoint_limit
< 0)
4698 else if (cnt
<= remote_hw_watchpoint_limit
)
4705 remote_stopped_by_watchpoint (void)
4707 return remote_stopped_by_watchpoint_p
;
4710 extern int stepped_after_stopped_by_watchpoint
;
4713 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
4716 if (remote_stopped_by_watchpoint ()
4717 || stepped_after_stopped_by_watchpoint
)
4719 *addr_p
= remote_watch_data_address
;
4728 remote_insert_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4731 struct remote_state
*rs
= get_remote_state ();
4732 char *buf
= alloca (rs
->remote_packet_size
);
4735 /* The length field should be set to the size of a breakpoint
4738 BREAKPOINT_FROM_PC (&addr
, &len
);
4740 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4741 error (_("Can't set hardware breakpoint without the '%s' (%s) packet."),
4742 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4743 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4749 addr
= remote_address_masked (addr
);
4750 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4751 sprintf (p
, ",%x", len
);
4754 getpkt (buf
, (rs
->remote_packet_size
), 0);
4756 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4759 case PACKET_UNKNOWN
:
4764 internal_error (__FILE__
, __LINE__
,
4765 _("remote_insert_hw_breakpoint: reached end of function"));
4770 remote_remove_hw_breakpoint (CORE_ADDR addr
, char *shadow
)
4773 struct remote_state
*rs
= get_remote_state ();
4774 char *buf
= alloca (rs
->remote_packet_size
);
4777 /* The length field should be set to the size of a breakpoint
4780 BREAKPOINT_FROM_PC (&addr
, &len
);
4782 if (remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].support
== PACKET_DISABLE
)
4783 error (_("Can't clear hardware breakpoint without the '%s' (%s) packet."),
4784 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].name
,
4785 remote_protocol_Z
[Z_PACKET_HARDWARE_BP
].title
);
4791 addr
= remote_address_masked (addr
);
4792 p
+= hexnumstr (p
, (ULONGEST
) addr
);
4793 sprintf (p
, ",%x", len
);
4796 getpkt (buf
, (rs
->remote_packet_size
), 0);
4798 switch (packet_ok (buf
, &remote_protocol_Z
[Z_PACKET_HARDWARE_BP
]))
4801 case PACKET_UNKNOWN
:
4806 internal_error (__FILE__
, __LINE__
,
4807 _("remote_remove_hw_breakpoint: reached end of function"));
4810 /* Some targets are only capable of doing downloads, and afterwards
4811 they switch to the remote serial protocol. This function provides
4812 a clean way to get from the download target to the remote target.
4813 It's basically just a wrapper so that we don't have to expose any
4814 of the internal workings of remote.c.
4816 Prior to calling this routine, you should shutdown the current
4817 target code, else you will get the "A program is being debugged
4818 already..." message. Usually a call to pop_target() suffices. */
4821 push_remote_target (char *name
, int from_tty
)
4823 printf_filtered (_("Switching to remote protocol\n"));
4824 remote_open (name
, from_tty
);
4827 /* Table used by the crc32 function to calcuate the checksum. */
4829 static unsigned long crc32_table
[256] =
4832 static unsigned long
4833 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
4835 if (!crc32_table
[1])
4837 /* Initialize the CRC table and the decoding table. */
4841 for (i
= 0; i
< 256; i
++)
4843 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
4844 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
4851 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
4857 /* compare-sections command
4859 With no arguments, compares each loadable section in the exec bfd
4860 with the same memory range on the target, and reports mismatches.
4861 Useful for verifying the image on the target against the exec file.
4862 Depends on the target understanding the new "qCRC:" request. */
4864 /* FIXME: cagney/1999-10-26: This command should be broken down into a
4865 target method (target verify memory) and generic version of the
4866 actual command. This will allow other high-level code (especially
4867 generic_load()) to make use of this target functionality. */
4870 compare_sections_command (char *args
, int from_tty
)
4872 struct remote_state
*rs
= get_remote_state ();
4874 unsigned long host_crc
, target_crc
;
4875 extern bfd
*exec_bfd
;
4876 struct cleanup
*old_chain
;
4879 const char *sectname
;
4880 char *buf
= alloca (rs
->remote_packet_size
);
4887 error (_("command cannot be used without an exec file"));
4888 if (!current_target
.to_shortname
||
4889 strcmp (current_target
.to_shortname
, "remote") != 0)
4890 error (_("command can only be used with remote target"));
4892 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
4894 if (!(s
->flags
& SEC_LOAD
))
4895 continue; /* skip non-loadable section */
4897 size
= bfd_get_section_size (s
);
4899 continue; /* skip zero-length section */
4901 sectname
= bfd_get_section_name (exec_bfd
, s
);
4902 if (args
&& strcmp (args
, sectname
) != 0)
4903 continue; /* not the section selected by user */
4905 matched
= 1; /* do this section */
4907 /* FIXME: assumes lma can fit into long. */
4908 sprintf (buf
, "qCRC:%lx,%lx", (long) lma
, (long) size
);
4911 /* Be clever; compute the host_crc before waiting for target
4913 sectdata
= xmalloc (size
);
4914 old_chain
= make_cleanup (xfree
, sectdata
);
4915 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
4916 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
4918 getpkt (buf
, (rs
->remote_packet_size
), 0);
4920 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
4921 sectname
, paddr (lma
), paddr (lma
+ size
));
4923 error (_("remote target does not support this operation"));
4925 for (target_crc
= 0, tmp
= &buf
[1]; *tmp
; tmp
++)
4926 target_crc
= target_crc
* 16 + fromhex (*tmp
);
4928 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
4929 sectname
, paddr (lma
), paddr (lma
+ size
));
4930 if (host_crc
== target_crc
)
4931 printf_filtered ("matched.\n");
4934 printf_filtered ("MIS-MATCHED!\n");
4938 do_cleanups (old_chain
);
4941 warning (_("One or more sections of the remote executable does not match\n\
4942 the loaded file\n"));
4943 if (args
&& !matched
)
4944 printf_filtered (_("No loaded section named '%s'.\n"), args
);
4948 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
4949 const char *annex
, void *readbuf
, const void *writebuf
,
4950 ULONGEST offset
, LONGEST len
)
4952 struct remote_state
*rs
= get_remote_state ();
4954 char *buf2
= alloca (rs
->remote_packet_size
);
4955 char *p2
= &buf2
[0];
4958 /* Handle memory using remote_xfer_memory. */
4959 if (object
== TARGET_OBJECT_MEMORY
)
4964 if (writebuf
!= NULL
)
4966 void *buffer
= xmalloc (len
);
4967 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
4968 memcpy (buffer
, writebuf
, len
);
4969 xfered
= remote_xfer_memory (offset
, buffer
, len
, 1, NULL
, ops
);
4970 do_cleanups (cleanup
);
4973 xfered
= remote_xfer_memory (offset
, readbuf
, len
, 0, NULL
, ops
);
4977 else if (xfered
== 0 && errno
== 0)
4983 /* Only handle reads. */
4984 if (writebuf
!= NULL
|| readbuf
== NULL
)
4987 /* Map pre-existing objects onto letters. DO NOT do this for new
4988 objects!!! Instead specify new query packets. */
4991 case TARGET_OBJECT_KOD
:
4994 case TARGET_OBJECT_AVR
:
4998 case TARGET_OBJECT_AUXV
:
4999 if (remote_protocol_qPart_auxv
.support
!= PACKET_DISABLE
)
5001 unsigned int total
= 0;
5004 LONGEST n
= min ((rs
->remote_packet_size
- 2) / 2, len
);
5005 snprintf (buf2
, rs
->remote_packet_size
,
5006 "qPart:auxv:read::%s,%s",
5007 phex_nz (offset
, sizeof offset
),
5008 phex_nz (n
, sizeof n
));
5011 return total
> 0 ? total
: i
;
5013 getpkt (buf2
, rs
->remote_packet_size
, 0);
5014 if (packet_ok (buf2
, &remote_protocol_qPart_auxv
) != PACKET_OK
)
5015 return total
> 0 ? total
: -1;
5016 if (buf2
[0] == 'O' && buf2
[1] == 'K' && buf2
[2] == '\0')
5017 break; /* Got EOF indicator. */
5018 /* Got some data. */
5019 i
= hex2bin (buf2
, readbuf
, len
);
5022 readbuf
= (void *) ((char *) readbuf
+ i
);
5036 /* Note: a zero OFFSET and LEN can be used to query the minimum
5038 if (offset
== 0 && len
== 0)
5039 return (rs
->remote_packet_size
);
5040 /* Minimum outbuf size is (rs->remote_packet_size) - if bufsiz is
5041 not large enough let the caller. */
5042 if (len
< (rs
->remote_packet_size
))
5044 len
= rs
->remote_packet_size
;
5046 /* Except for querying the minimum buffer size, target must be open. */
5048 error (_("remote query is only available after target open"));
5050 gdb_assert (annex
!= NULL
);
5051 gdb_assert (readbuf
!= NULL
);
5056 /* We used one buffer char for the remote protocol q command and
5057 another for the query type. As the remote protocol encapsulation
5058 uses 4 chars plus one extra in case we are debugging
5059 (remote_debug), we have PBUFZIZ - 7 left to pack the query
5062 while (annex
[i
] && (i
< ((rs
->remote_packet_size
) - 8)))
5064 /* Bad caller may have sent forbidden characters. */
5065 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
5070 gdb_assert (annex
[i
] == '\0');
5076 getpkt (readbuf
, len
, 0);
5078 return strlen (readbuf
);
5082 remote_rcmd (char *command
,
5083 struct ui_file
*outbuf
)
5085 struct remote_state
*rs
= get_remote_state ();
5087 char *buf
= alloca (rs
->remote_packet_size
);
5091 error (_("remote rcmd is only available after target open"));
5093 /* Send a NULL command across as an empty command. */
5094 if (command
== NULL
)
5097 /* The query prefix. */
5098 strcpy (buf
, "qRcmd,");
5099 p
= strchr (buf
, '\0');
5101 if ((strlen (buf
) + strlen (command
) * 2 + 8/*misc*/) > (rs
->remote_packet_size
))
5102 error (_("\"monitor\" command ``%s'' is too long."), command
);
5104 /* Encode the actual command. */
5105 bin2hex (command
, p
, 0);
5107 if (putpkt (buf
) < 0)
5108 error (_("Communication problem with target."));
5110 /* get/display the response */
5113 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
5115 getpkt (buf
, (rs
->remote_packet_size
), 0);
5117 error (_("Target does not support this command."));
5118 if (buf
[0] == 'O' && buf
[1] != 'K')
5120 remote_console_output (buf
+ 1); /* 'O' message from stub. */
5123 if (strcmp (buf
, "OK") == 0)
5125 if (strlen (buf
) == 3 && buf
[0] == 'E'
5126 && isdigit (buf
[1]) && isdigit (buf
[2]))
5128 error (_("Protocol error with Rcmd"));
5130 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
5132 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
5133 fputc_unfiltered (c
, outbuf
);
5140 packet_command (char *args
, int from_tty
)
5142 struct remote_state
*rs
= get_remote_state ();
5143 char *buf
= alloca (rs
->remote_packet_size
);
5146 error (_("command can only be used with remote target"));
5149 error (_("remote-packet command requires packet text as argument"));
5151 puts_filtered ("sending: ");
5152 print_packet (args
);
5153 puts_filtered ("\n");
5156 getpkt (buf
, (rs
->remote_packet_size
), 0);
5157 puts_filtered ("received: ");
5159 puts_filtered ("\n");
5163 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
5165 static void display_thread_info (struct gdb_ext_thread_info
*info
);
5167 static void threadset_test_cmd (char *cmd
, int tty
);
5169 static void threadalive_test (char *cmd
, int tty
);
5171 static void threadlist_test_cmd (char *cmd
, int tty
);
5173 int get_and_display_threadinfo (threadref
*ref
);
5175 static void threadinfo_test_cmd (char *cmd
, int tty
);
5177 static int thread_display_step (threadref
*ref
, void *context
);
5179 static void threadlist_update_test_cmd (char *cmd
, int tty
);
5181 static void init_remote_threadtests (void);
5183 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
5186 threadset_test_cmd (char *cmd
, int tty
)
5188 int sample_thread
= SAMPLE_THREAD
;
5190 printf_filtered (_("Remote threadset test\n"));
5191 set_thread (sample_thread
, 1);
5196 threadalive_test (char *cmd
, int tty
)
5198 int sample_thread
= SAMPLE_THREAD
;
5200 if (remote_thread_alive (pid_to_ptid (sample_thread
)))
5201 printf_filtered ("PASS: Thread alive test\n");
5203 printf_filtered ("FAIL: Thread alive test\n");
5206 void output_threadid (char *title
, threadref
*ref
);
5209 output_threadid (char *title
, threadref
*ref
)
5213 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
5215 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
5219 threadlist_test_cmd (char *cmd
, int tty
)
5222 threadref nextthread
;
5223 int done
, result_count
;
5224 threadref threadlist
[3];
5226 printf_filtered ("Remote Threadlist test\n");
5227 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
5228 &result_count
, &threadlist
[0]))
5229 printf_filtered ("FAIL: threadlist test\n");
5232 threadref
*scan
= threadlist
;
5233 threadref
*limit
= scan
+ result_count
;
5235 while (scan
< limit
)
5236 output_threadid (" thread ", scan
++);
5241 display_thread_info (struct gdb_ext_thread_info
*info
)
5243 output_threadid ("Threadid: ", &info
->threadid
);
5244 printf_filtered ("Name: %s\n ", info
->shortname
);
5245 printf_filtered ("State: %s\n", info
->display
);
5246 printf_filtered ("other: %s\n\n", info
->more_display
);
5250 get_and_display_threadinfo (threadref
*ref
)
5254 struct gdb_ext_thread_info threadinfo
;
5256 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
5257 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
5258 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
5259 display_thread_info (&threadinfo
);
5264 threadinfo_test_cmd (char *cmd
, int tty
)
5266 int athread
= SAMPLE_THREAD
;
5270 int_to_threadref (&thread
, athread
);
5271 printf_filtered ("Remote Threadinfo test\n");
5272 if (!get_and_display_threadinfo (&thread
))
5273 printf_filtered ("FAIL cannot get thread info\n");
5277 thread_display_step (threadref
*ref
, void *context
)
5279 /* output_threadid(" threadstep ",ref); *//* simple test */
5280 return get_and_display_threadinfo (ref
);
5284 threadlist_update_test_cmd (char *cmd
, int tty
)
5286 printf_filtered ("Remote Threadlist update test\n");
5287 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
5291 init_remote_threadtests (void)
5293 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
5294 Fetch and print the remote list of thread identifiers, one pkt only"));
5295 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
5296 _("Fetch and display info about one thread"));
5297 add_com ("tset", class_obscure
, threadset_test_cmd
,
5298 _("Test setting to a different thread"));
5299 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
5300 _("Iterate through updating all remote thread info"));
5301 add_com ("talive", class_obscure
, threadalive_test
,
5302 _(" Remote thread alive test "));
5307 /* Convert a thread ID to a string. Returns the string in a static
5311 remote_pid_to_str (ptid_t ptid
)
5313 static char buf
[30];
5315 sprintf (buf
, "Thread %d", PIDGET (ptid
));
5320 init_remote_ops (void)
5322 remote_ops
.to_shortname
= "remote";
5323 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
5325 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5326 Specify the serial device it is connected to\n\
5327 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
5328 remote_ops
.to_open
= remote_open
;
5329 remote_ops
.to_close
= remote_close
;
5330 remote_ops
.to_detach
= remote_detach
;
5331 remote_ops
.to_disconnect
= remote_disconnect
;
5332 remote_ops
.to_resume
= remote_resume
;
5333 remote_ops
.to_wait
= remote_wait
;
5334 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
5335 remote_ops
.to_store_registers
= remote_store_registers
;
5336 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5337 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
5338 remote_ops
.to_files_info
= remote_files_info
;
5339 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5340 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5341 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5342 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5343 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5344 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5345 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5346 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5347 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5348 remote_ops
.to_kill
= remote_kill
;
5349 remote_ops
.to_load
= generic_load
;
5350 remote_ops
.to_mourn_inferior
= remote_mourn
;
5351 remote_ops
.to_thread_alive
= remote_thread_alive
;
5352 remote_ops
.to_find_new_threads
= remote_threads_info
;
5353 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
5354 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5355 remote_ops
.to_stop
= remote_stop
;
5356 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
5357 remote_ops
.to_rcmd
= remote_rcmd
;
5358 remote_ops
.to_stratum
= process_stratum
;
5359 remote_ops
.to_has_all_memory
= 1;
5360 remote_ops
.to_has_memory
= 1;
5361 remote_ops
.to_has_stack
= 1;
5362 remote_ops
.to_has_registers
= 1;
5363 remote_ops
.to_has_execution
= 1;
5364 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5365 remote_ops
.to_magic
= OPS_MAGIC
;
5368 /* Set up the extended remote vector by making a copy of the standard
5369 remote vector and adding to it. */
5372 init_extended_remote_ops (void)
5374 extended_remote_ops
= remote_ops
;
5376 extended_remote_ops
.to_shortname
= "extended-remote";
5377 extended_remote_ops
.to_longname
=
5378 "Extended remote serial target in gdb-specific protocol";
5379 extended_remote_ops
.to_doc
=
5380 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5381 Specify the serial device it is connected to (e.g. /dev/ttya).",
5382 extended_remote_ops
.to_open
= extended_remote_open
;
5383 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
5384 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5388 remote_can_async_p (void)
5390 /* We're async whenever the serial device is. */
5391 return (current_target
.to_async_mask_value
) && serial_can_async_p (remote_desc
);
5395 remote_is_async_p (void)
5397 /* We're async whenever the serial device is. */
5398 return (current_target
.to_async_mask_value
) && serial_is_async_p (remote_desc
);
5401 /* Pass the SERIAL event on and up to the client. One day this code
5402 will be able to delay notifying the client of an event until the
5403 point where an entire packet has been received. */
5405 static void (*async_client_callback
) (enum inferior_event_type event_type
,
5407 static void *async_client_context
;
5408 static serial_event_ftype remote_async_serial_handler
;
5411 remote_async_serial_handler (struct serial
*scb
, void *context
)
5413 /* Don't propogate error information up to the client. Instead let
5414 the client find out about the error by querying the target. */
5415 async_client_callback (INF_REG_EVENT
, async_client_context
);
5419 remote_async (void (*callback
) (enum inferior_event_type event_type
,
5420 void *context
), void *context
)
5422 if (current_target
.to_async_mask_value
== 0)
5423 internal_error (__FILE__
, __LINE__
,
5424 _("Calling remote_async when async is masked"));
5426 if (callback
!= NULL
)
5428 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
5429 async_client_callback
= callback
;
5430 async_client_context
= context
;
5433 serial_async (remote_desc
, NULL
, NULL
);
5436 /* Target async and target extended-async.
5438 This are temporary targets, until it is all tested. Eventually
5439 async support will be incorporated int the usual 'remote'
5443 init_remote_async_ops (void)
5445 remote_async_ops
.to_shortname
= "async";
5446 remote_async_ops
.to_longname
=
5447 "Remote serial target in async version of the gdb-specific protocol";
5448 remote_async_ops
.to_doc
=
5449 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
5450 Specify the serial device it is connected to (e.g. /dev/ttya).";
5451 remote_async_ops
.to_open
= remote_async_open
;
5452 remote_async_ops
.to_close
= remote_close
;
5453 remote_async_ops
.to_detach
= remote_detach
;
5454 remote_async_ops
.to_disconnect
= remote_disconnect
;
5455 remote_async_ops
.to_resume
= remote_async_resume
;
5456 remote_async_ops
.to_wait
= remote_async_wait
;
5457 remote_async_ops
.to_fetch_registers
= remote_fetch_registers
;
5458 remote_async_ops
.to_store_registers
= remote_store_registers
;
5459 remote_async_ops
.to_prepare_to_store
= remote_prepare_to_store
;
5460 remote_async_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
5461 remote_async_ops
.to_files_info
= remote_files_info
;
5462 remote_async_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
5463 remote_async_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
5464 remote_async_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
5465 remote_async_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
5466 remote_async_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
5467 remote_async_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
5468 remote_async_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
5469 remote_async_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
5470 remote_async_ops
.to_stopped_data_address
= remote_stopped_data_address
;
5471 remote_async_ops
.to_terminal_inferior
= remote_async_terminal_inferior
;
5472 remote_async_ops
.to_terminal_ours
= remote_async_terminal_ours
;
5473 remote_async_ops
.to_kill
= remote_async_kill
;
5474 remote_async_ops
.to_load
= generic_load
;
5475 remote_async_ops
.to_mourn_inferior
= remote_async_mourn
;
5476 remote_async_ops
.to_thread_alive
= remote_thread_alive
;
5477 remote_async_ops
.to_find_new_threads
= remote_threads_info
;
5478 remote_async_ops
.to_pid_to_str
= remote_pid_to_str
;
5479 remote_async_ops
.to_extra_thread_info
= remote_threads_extra_info
;
5480 remote_async_ops
.to_stop
= remote_stop
;
5481 remote_async_ops
.to_xfer_partial
= remote_xfer_partial
;
5482 remote_async_ops
.to_rcmd
= remote_rcmd
;
5483 remote_async_ops
.to_stratum
= process_stratum
;
5484 remote_async_ops
.to_has_all_memory
= 1;
5485 remote_async_ops
.to_has_memory
= 1;
5486 remote_async_ops
.to_has_stack
= 1;
5487 remote_async_ops
.to_has_registers
= 1;
5488 remote_async_ops
.to_has_execution
= 1;
5489 remote_async_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
5490 remote_async_ops
.to_can_async_p
= remote_can_async_p
;
5491 remote_async_ops
.to_is_async_p
= remote_is_async_p
;
5492 remote_async_ops
.to_async
= remote_async
;
5493 remote_async_ops
.to_async_mask_value
= 1;
5494 remote_async_ops
.to_magic
= OPS_MAGIC
;
5497 /* Set up the async extended remote vector by making a copy of the standard
5498 remote vector and adding to it. */
5501 init_extended_async_remote_ops (void)
5503 extended_async_remote_ops
= remote_async_ops
;
5505 extended_async_remote_ops
.to_shortname
= "extended-async";
5506 extended_async_remote_ops
.to_longname
=
5507 "Extended remote serial target in async gdb-specific protocol";
5508 extended_async_remote_ops
.to_doc
=
5509 "Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
5510 Specify the serial device it is connected to (e.g. /dev/ttya).",
5511 extended_async_remote_ops
.to_open
= extended_remote_async_open
;
5512 extended_async_remote_ops
.to_create_inferior
= extended_remote_async_create_inferior
;
5513 extended_async_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
5517 set_remote_cmd (char *args
, int from_tty
)
5522 show_remote_cmd (char *args
, int from_tty
)
5524 /* FIXME: cagney/2002-06-15: This function should iterate over
5525 remote_show_cmdlist for a list of sub commands to show. */
5526 show_remote_protocol_Z_packet_cmd (gdb_stdout
, from_tty
, NULL
, NULL
);
5527 show_remote_protocol_P_packet_cmd (gdb_stdout
, from_tty
, NULL
, NULL
);
5528 show_remote_protocol_p_packet_cmd (gdb_stdout
, from_tty
, NULL
, NULL
);
5529 show_remote_protocol_qSymbol_packet_cmd (gdb_stdout
, from_tty
, NULL
, NULL
);
5530 show_remote_protocol_vcont_packet_cmd (gdb_stdout
, from_tty
, NULL
, NULL
);
5531 show_remote_protocol_binary_download_cmd (gdb_stdout
, from_tty
, NULL
, NULL
);
5532 show_remote_protocol_qPart_auxv_packet_cmd (gdb_stdout
, from_tty
, NULL
, NULL
);
5536 build_remote_gdbarch_data (void)
5538 remote_address_size
= TARGET_ADDR_BIT
;
5541 /* Saved pointer to previous owner of the new_objfile event. */
5542 static void (*remote_new_objfile_chain
) (struct objfile
*);
5544 /* Function to be called whenever a new objfile (shlib) is detected. */
5546 remote_new_objfile (struct objfile
*objfile
)
5548 if (remote_desc
!= 0) /* Have a remote connection. */
5550 remote_check_symbols (objfile
);
5552 /* Call predecessor on chain, if any. */
5553 if (remote_new_objfile_chain
!= 0 &&
5555 remote_new_objfile_chain (objfile
);
5559 _initialize_remote (void)
5561 static struct cmd_list_element
*remote_set_cmdlist
;
5562 static struct cmd_list_element
*remote_show_cmdlist
;
5563 struct cmd_list_element
*tmpcmd
;
5565 /* architecture specific data */
5566 remote_gdbarch_data_handle
=
5567 gdbarch_data_register_post_init (init_remote_state
);
5569 /* Old tacky stuff. NOTE: This comes after the remote protocol so
5570 that the remote protocol has been initialized. */
5571 DEPRECATED_REGISTER_GDBARCH_SWAP (remote_address_size
);
5572 deprecated_register_gdbarch_swap (NULL
, 0, build_remote_gdbarch_data
);
5575 add_target (&remote_ops
);
5577 init_extended_remote_ops ();
5578 add_target (&extended_remote_ops
);
5580 init_remote_async_ops ();
5581 add_target (&remote_async_ops
);
5583 init_extended_async_remote_ops ();
5584 add_target (&extended_async_remote_ops
);
5586 /* Hook into new objfile notification. */
5587 remote_new_objfile_chain
= deprecated_target_new_objfile_hook
;
5588 deprecated_target_new_objfile_hook
= remote_new_objfile
;
5591 init_remote_threadtests ();
5594 /* set/show remote ... */
5596 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
5597 Remote protocol specific variables\n\
5598 Configure various remote-protocol specific variables such as\n\
5599 the packets being used"),
5600 &remote_set_cmdlist
, "set remote ",
5601 0 /* allow-unknown */, &setlist
);
5602 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
5603 Remote protocol specific variables\n\
5604 Configure various remote-protocol specific variables such as\n\
5605 the packets being used"),
5606 &remote_show_cmdlist
, "show remote ",
5607 0 /* allow-unknown */, &showlist
);
5609 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
5610 Compare section data on target to the exec file.\n\
5611 Argument is a single section name (default: all loaded sections)."),
5614 add_cmd ("packet", class_maintenance
, packet_command
, _("\
5615 Send an arbitrary packet to a remote target.\n\
5616 maintenance packet TEXT\n\
5617 If GDB is talking to an inferior via the GDB serial protocol, then\n\
5618 this command sends the string TEXT to the inferior, and displays the\n\
5619 response packet. GDB supplies the initial `$' character, and the\n\
5620 terminating `#' character and checksum."),
5623 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
5624 Set whether to send break if interrupted."), _("\
5625 Show whether to send break if interrupted."), _("\
5626 If set, a break, instead of a cntrl-c, is sent to the remote target."),
5627 NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
5629 &setlist
, &showlist
);
5631 /* Install commands for configuring memory read/write packets. */
5633 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
5634 Set the maximum number of bytes per memory write packet (deprecated)."),
5636 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
5637 Show the maximum number of bytes per memory write packet (deprecated)."),
5639 add_cmd ("memory-write-packet-size", no_class
,
5640 set_memory_write_packet_size
, _("\
5641 Set the maximum number of bytes per memory-write packet.\n\
5642 Specify the number of bytes in a packet or 0 (zero) for the\n\
5643 default packet size. The actual limit is further reduced\n\
5644 dependent on the target. Specify ``fixed'' to disable the\n\
5645 further restriction and ``limit'' to enable that restriction."),
5646 &remote_set_cmdlist
);
5647 add_cmd ("memory-read-packet-size", no_class
,
5648 set_memory_read_packet_size
, _("\
5649 Set the maximum number of bytes per memory-read packet.\n\
5650 Specify the number of bytes in a packet or 0 (zero) for the\n\
5651 default packet size. The actual limit is further reduced\n\
5652 dependent on the target. Specify ``fixed'' to disable the\n\
5653 further restriction and ``limit'' to enable that restriction."),
5654 &remote_set_cmdlist
);
5655 add_cmd ("memory-write-packet-size", no_class
,
5656 show_memory_write_packet_size
,
5657 _("Show the maximum number of bytes per memory-write packet."),
5658 &remote_show_cmdlist
);
5659 add_cmd ("memory-read-packet-size", no_class
,
5660 show_memory_read_packet_size
,
5661 _("Show the maximum number of bytes per memory-read packet."),
5662 &remote_show_cmdlist
);
5664 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
5665 &remote_hw_watchpoint_limit
, _("\
5666 Set the maximum number of target hardware watchpoints."), _("\
5667 Show the maximum number of target hardware watchpoints."), _("\
5668 Specify a negative limit for unlimited."),
5669 NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
5671 &remote_set_cmdlist
, &remote_show_cmdlist
);
5672 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
5673 &remote_hw_breakpoint_limit
, _("\
5674 Set the maximum number of target hardware breakpoints."), _("\
5675 Show the maximum number of target hardware breakpoints."), _("\
5676 Specify a negative limit for unlimited."),
5677 NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
5679 &remote_set_cmdlist
, &remote_show_cmdlist
);
5681 deprecated_add_show_from_set
5682 (add_set_cmd ("remoteaddresssize", class_obscure
,
5683 var_integer
, (char *) &remote_address_size
,
5684 "Set the maximum size of the address (in bits) \
5685 in a memory packet.\n",
5689 add_packet_config_cmd (&remote_protocol_binary_download
,
5690 "X", "binary-download",
5691 set_remote_protocol_binary_download_cmd
,
5692 show_remote_protocol_binary_download_cmd
,
5693 &remote_set_cmdlist
, &remote_show_cmdlist
,
5696 /* XXXX - should ``set remotebinarydownload'' be retained for
5698 deprecated_add_show_from_set
5699 (add_set_cmd ("remotebinarydownload", no_class
,
5700 var_boolean
, (char *) &remote_binary_download
,
5701 "Set binary downloads.\n", &setlist
),
5705 add_packet_config_cmd (&remote_protocol_vcont
,
5706 "vCont", "verbose-resume",
5707 set_remote_protocol_vcont_packet_cmd
,
5708 show_remote_protocol_vcont_packet_cmd
,
5709 &remote_set_cmdlist
, &remote_show_cmdlist
,
5712 add_packet_config_cmd (&remote_protocol_qSymbol
,
5713 "qSymbol", "symbol-lookup",
5714 set_remote_protocol_qSymbol_packet_cmd
,
5715 show_remote_protocol_qSymbol_packet_cmd
,
5716 &remote_set_cmdlist
, &remote_show_cmdlist
,
5719 add_packet_config_cmd (&remote_protocol_P
,
5720 "P", "set-register",
5721 set_remote_protocol_P_packet_cmd
,
5722 show_remote_protocol_P_packet_cmd
,
5723 &remote_set_cmdlist
, &remote_show_cmdlist
,
5726 add_packet_config_cmd (&remote_protocol_p
,
5727 "p", "fetch-register",
5728 set_remote_protocol_p_packet_cmd
,
5729 show_remote_protocol_p_packet_cmd
,
5730 &remote_set_cmdlist
, &remote_show_cmdlist
,
5733 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_SOFTWARE_BP
],
5734 "Z0", "software-breakpoint",
5735 set_remote_protocol_Z_software_bp_packet_cmd
,
5736 show_remote_protocol_Z_software_bp_packet_cmd
,
5737 &remote_set_cmdlist
, &remote_show_cmdlist
,
5740 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_HARDWARE_BP
],
5741 "Z1", "hardware-breakpoint",
5742 set_remote_protocol_Z_hardware_bp_packet_cmd
,
5743 show_remote_protocol_Z_hardware_bp_packet_cmd
,
5744 &remote_set_cmdlist
, &remote_show_cmdlist
,
5747 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_WRITE_WP
],
5748 "Z2", "write-watchpoint",
5749 set_remote_protocol_Z_write_wp_packet_cmd
,
5750 show_remote_protocol_Z_write_wp_packet_cmd
,
5751 &remote_set_cmdlist
, &remote_show_cmdlist
,
5754 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_READ_WP
],
5755 "Z3", "read-watchpoint",
5756 set_remote_protocol_Z_read_wp_packet_cmd
,
5757 show_remote_protocol_Z_read_wp_packet_cmd
,
5758 &remote_set_cmdlist
, &remote_show_cmdlist
,
5761 add_packet_config_cmd (&remote_protocol_Z
[Z_PACKET_ACCESS_WP
],
5762 "Z4", "access-watchpoint",
5763 set_remote_protocol_Z_access_wp_packet_cmd
,
5764 show_remote_protocol_Z_access_wp_packet_cmd
,
5765 &remote_set_cmdlist
, &remote_show_cmdlist
,
5768 add_packet_config_cmd (&remote_protocol_qPart_auxv
,
5769 "qPart_auxv", "read-aux-vector",
5770 set_remote_protocol_qPart_auxv_packet_cmd
,
5771 show_remote_protocol_qPart_auxv_packet_cmd
,
5772 &remote_set_cmdlist
, &remote_show_cmdlist
,
5775 /* Keep the old ``set remote Z-packet ...'' working. */
5776 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
5777 &remote_Z_packet_detect
, _("\
5778 Set use of remote protocol `Z' packets"), _("\
5779 Show use of remote protocol `Z' packets "), _("\
5780 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
5782 NULL
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
5783 set_remote_protocol_Z_packet_cmd
,
5784 show_remote_protocol_Z_packet_cmd
,
5785 &remote_set_cmdlist
, &remote_show_cmdlist
);
5787 /* Eventually initialize fileio. See fileio.c */
5788 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);