1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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 3 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, see <http://www.gnu.org/licenses/>. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
25 #include "gdb_string.h"
31 #include "exceptions.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
41 #include "gdb_assert.h"
44 #include "cli/cli-decode.h"
45 #include "cli/cli-setshow.h"
46 #include "target-descriptions.h"
51 #include "event-loop.h"
52 #include "event-top.h"
58 #include "gdbcore.h" /* for exec_bfd */
60 #include "remote-fileio.h"
61 #include "gdb/fileio.h"
64 #include "memory-map.h"
66 /* The size to align memory write packets, when practical. The protocol
67 does not guarantee any alignment, and gdb will generate short
68 writes and unaligned writes, but even as a best-effort attempt this
69 can improve bulk transfers. For instance, if a write is misaligned
70 relative to the target's data bus, the stub may need to make an extra
71 round trip fetching data from the target. This doesn't make a
72 huge difference, but it's easy to do, so we try to be helpful.
74 The alignment chosen is arbitrary; usually data bus width is
75 important here, not the possibly larger cache line size. */
76 enum { REMOTE_ALIGN_WRITES
= 16 };
78 /* Prototypes for local functions. */
79 static void cleanup_sigint_signal_handler (void *dummy
);
80 static void initialize_sigint_signal_handler (void);
81 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
82 static int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
,
85 static void handle_remote_sigint (int);
86 static void handle_remote_sigint_twice (int);
87 static void async_remote_interrupt (gdb_client_data
);
88 void async_remote_interrupt_twice (gdb_client_data
);
90 static void remote_files_info (struct target_ops
*ignore
);
92 static void remote_prepare_to_store (struct regcache
*regcache
);
94 static void remote_open (char *name
, int from_tty
);
96 static void extended_remote_open (char *name
, int from_tty
);
98 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
);
100 static void remote_close (int quitting
);
102 static void remote_mourn (struct target_ops
*ops
);
104 static void extended_remote_restart (void);
106 static void extended_remote_mourn (struct target_ops
*);
108 static void remote_mourn_1 (struct target_ops
*);
110 static void remote_send (char **buf
, long *sizeof_buf_p
);
112 static int readchar (int timeout
);
114 static void remote_kill (struct target_ops
*ops
);
116 static int tohex (int nib
);
118 static int remote_can_async_p (void);
120 static int remote_is_async_p (void);
122 static void remote_async (void (*callback
) (enum inferior_event_type event_type
,
123 void *context
), void *context
);
125 static int remote_async_mask (int new_mask
);
127 static void remote_detach (struct target_ops
*ops
, char *args
, int from_tty
);
129 static void remote_interrupt (int signo
);
131 static void remote_interrupt_twice (int signo
);
133 static void interrupt_query (void);
135 static void set_general_thread (struct ptid ptid
);
136 static void set_continue_thread (struct ptid ptid
);
138 static void get_offsets (void);
140 static void skip_frame (void);
142 static long read_frame (char **buf_p
, long *sizeof_buf
);
144 static int hexnumlen (ULONGEST num
);
146 static void init_remote_ops (void);
148 static void init_extended_remote_ops (void);
150 static void remote_stop (ptid_t
);
152 static int ishex (int ch
, int *val
);
154 static int stubhex (int ch
);
156 static int hexnumstr (char *, ULONGEST
);
158 static int hexnumnstr (char *, ULONGEST
, int);
160 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
162 static void print_packet (char *);
164 static unsigned long crc32 (unsigned char *, int, unsigned int);
166 static void compare_sections_command (char *, int);
168 static void packet_command (char *, int);
170 static int stub_unpack_int (char *buff
, int fieldlength
);
172 static ptid_t
remote_current_thread (ptid_t oldptid
);
174 static void remote_find_new_threads (void);
176 static void record_currthread (ptid_t currthread
);
178 static int fromhex (int a
);
180 static int hex2bin (const char *hex
, gdb_byte
*bin
, int count
);
182 static int bin2hex (const gdb_byte
*bin
, char *hex
, int count
);
184 static int putpkt_binary (char *buf
, int cnt
);
186 static void check_binary_download (CORE_ADDR addr
);
188 struct packet_config
;
190 static void show_packet_config_cmd (struct packet_config
*config
);
192 static void update_packet_config (struct packet_config
*config
);
194 static void set_remote_protocol_packet_cmd (char *args
, int from_tty
,
195 struct cmd_list_element
*c
);
197 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
199 struct cmd_list_element
*c
,
202 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
203 static ptid_t
read_ptid (char *buf
, char **obuf
);
205 static void remote_query_supported (void);
207 static void remote_check_symbols (struct objfile
*objfile
);
209 void _initialize_remote (void);
212 static struct stop_reply
*stop_reply_xmalloc (void);
213 static void stop_reply_xfree (struct stop_reply
*);
214 static void do_stop_reply_xfree (void *arg
);
215 static void remote_parse_stop_reply (char *buf
, struct stop_reply
*);
216 static void push_stop_reply (struct stop_reply
*);
217 static void remote_get_pending_stop_replies (void);
218 static void discard_pending_stop_replies (int pid
);
219 static int peek_stop_reply (ptid_t ptid
);
221 static void remote_async_inferior_event_handler (gdb_client_data
);
222 static void remote_async_get_pending_events_handler (gdb_client_data
);
224 static void remote_terminal_ours (void);
226 static int remote_read_description_p (struct target_ops
*target
);
228 /* The non-stop remote protocol provisions for one pending stop reply.
229 This is where we keep it until it is acknowledged. */
231 static struct stop_reply
*pending_stop_reply
= NULL
;
235 static struct cmd_list_element
*remote_cmdlist
;
237 /* For "set remote" and "show remote". */
239 static struct cmd_list_element
*remote_set_cmdlist
;
240 static struct cmd_list_element
*remote_show_cmdlist
;
242 /* Description of the remote protocol state for the currently
243 connected target. This is per-target state, and independent of the
244 selected architecture. */
248 /* A buffer to use for incoming packets, and its current size. The
249 buffer is grown dynamically for larger incoming packets.
250 Outgoing packets may also be constructed in this buffer.
251 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
252 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
257 /* If we negotiated packet size explicitly (and thus can bypass
258 heuristics for the largest packet size that will not overflow
259 a buffer in the stub), this will be set to that packet size.
260 Otherwise zero, meaning to use the guessed size. */
261 long explicit_packet_size
;
263 /* remote_wait is normally called when the target is running and
264 waits for a stop reply packet. But sometimes we need to call it
265 when the target is already stopped. We can send a "?" packet
266 and have remote_wait read the response. Or, if we already have
267 the response, we can stash it in BUF and tell remote_wait to
268 skip calling getpkt. This flag is set when BUF contains a
269 stop reply packet and the target is not waiting. */
270 int cached_wait_status
;
272 /* True, if in no ack mode. That is, neither GDB nor the stub will
273 expect acks from each other. The connection is assumed to be
277 /* True if we're connected in extended remote mode. */
280 /* True if the stub reported support for multi-process
282 int multi_process_aware
;
284 /* True if we resumed the target and we're waiting for the target to
285 stop. In the mean time, we can't start another command/query.
286 The remote server wouldn't be ready to process it, so we'd
287 timeout waiting for a reply that would never come and eventually
288 we'd close the connection. This can happen in asynchronous mode
289 because we allow GDB commands while the target is running. */
290 int waiting_for_stop_reply
;
292 /* True if the stub reports support for non-stop mode. */
295 /* True if the stub reports support for vCont;t. */
299 /* Returns true if the multi-process extensions are in effect. */
301 remote_multi_process_p (struct remote_state
*rs
)
303 return rs
->extended
&& rs
->multi_process_aware
;
306 /* This data could be associated with a target, but we do not always
307 have access to the current target when we need it, so for now it is
308 static. This will be fine for as long as only one target is in use
310 static struct remote_state remote_state
;
312 static struct remote_state
*
313 get_remote_state_raw (void)
315 return &remote_state
;
318 /* Description of the remote protocol for a given architecture. */
322 long offset
; /* Offset into G packet. */
323 long regnum
; /* GDB's internal register number. */
324 LONGEST pnum
; /* Remote protocol register number. */
325 int in_g_packet
; /* Always part of G packet. */
326 /* long size in bytes; == register_size (target_gdbarch, regnum);
328 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
332 struct remote_arch_state
334 /* Description of the remote protocol registers. */
335 long sizeof_g_packet
;
337 /* Description of the remote protocol registers indexed by REGNUM
338 (making an array gdbarch_num_regs in size). */
339 struct packet_reg
*regs
;
341 /* This is the size (in chars) of the first response to the ``g''
342 packet. It is used as a heuristic when determining the maximum
343 size of memory-read and memory-write packets. A target will
344 typically only reserve a buffer large enough to hold the ``g''
345 packet. The size does not include packet overhead (headers and
347 long actual_register_packet_size
;
349 /* This is the maximum size (in chars) of a non read/write packet.
350 It is also used as a cap on the size of read/write packets. */
351 long remote_packet_size
;
355 /* Handle for retreving the remote protocol data from gdbarch. */
356 static struct gdbarch_data
*remote_gdbarch_data_handle
;
358 static struct remote_arch_state
*
359 get_remote_arch_state (void)
361 return gdbarch_data (target_gdbarch
, remote_gdbarch_data_handle
);
364 /* Fetch the global remote target state. */
366 static struct remote_state
*
367 get_remote_state (void)
369 /* Make sure that the remote architecture state has been
370 initialized, because doing so might reallocate rs->buf. Any
371 function which calls getpkt also needs to be mindful of changes
372 to rs->buf, but this call limits the number of places which run
374 get_remote_arch_state ();
376 return get_remote_state_raw ();
380 compare_pnums (const void *lhs_
, const void *rhs_
)
382 const struct packet_reg
* const *lhs
= lhs_
;
383 const struct packet_reg
* const *rhs
= rhs_
;
385 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
387 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
394 init_remote_state (struct gdbarch
*gdbarch
)
396 int regnum
, num_remote_regs
, offset
;
397 struct remote_state
*rs
= get_remote_state_raw ();
398 struct remote_arch_state
*rsa
;
399 struct packet_reg
**remote_regs
;
401 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
403 /* Use the architecture to build a regnum<->pnum table, which will be
404 1:1 unless a feature set specifies otherwise. */
405 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
406 gdbarch_num_regs (gdbarch
),
408 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
410 struct packet_reg
*r
= &rsa
->regs
[regnum
];
412 if (register_size (gdbarch
, regnum
) == 0)
413 /* Do not try to fetch zero-sized (placeholder) registers. */
416 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
421 /* Define the g/G packet format as the contents of each register
422 with a remote protocol number, in order of ascending protocol
425 remote_regs
= alloca (gdbarch_num_regs (gdbarch
)
426 * sizeof (struct packet_reg
*));
427 for (num_remote_regs
= 0, regnum
= 0;
428 regnum
< gdbarch_num_regs (gdbarch
);
430 if (rsa
->regs
[regnum
].pnum
!= -1)
431 remote_regs
[num_remote_regs
++] = &rsa
->regs
[regnum
];
433 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
436 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
438 remote_regs
[regnum
]->in_g_packet
= 1;
439 remote_regs
[regnum
]->offset
= offset
;
440 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
443 /* Record the maximum possible size of the g packet - it may turn out
445 rsa
->sizeof_g_packet
= offset
;
447 /* Default maximum number of characters in a packet body. Many
448 remote stubs have a hardwired buffer size of 400 bytes
449 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
450 as the maximum packet-size to ensure that the packet and an extra
451 NUL character can always fit in the buffer. This stops GDB
452 trashing stubs that try to squeeze an extra NUL into what is
453 already a full buffer (As of 1999-12-04 that was most stubs). */
454 rsa
->remote_packet_size
= 400 - 1;
456 /* This one is filled in when a ``g'' packet is received. */
457 rsa
->actual_register_packet_size
= 0;
459 /* Should rsa->sizeof_g_packet needs more space than the
460 default, adjust the size accordingly. Remember that each byte is
461 encoded as two characters. 32 is the overhead for the packet
462 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
463 (``$NN:G...#NN'') is a better guess, the below has been padded a
465 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
466 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
468 /* Make sure that the packet buffer is plenty big enough for
469 this architecture. */
470 if (rs
->buf_size
< rsa
->remote_packet_size
)
472 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
473 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
479 /* Return the current allowed size of a remote packet. This is
480 inferred from the current architecture, and should be used to
481 limit the length of outgoing packets. */
483 get_remote_packet_size (void)
485 struct remote_state
*rs
= get_remote_state ();
486 struct remote_arch_state
*rsa
= get_remote_arch_state ();
488 if (rs
->explicit_packet_size
)
489 return rs
->explicit_packet_size
;
491 return rsa
->remote_packet_size
;
494 static struct packet_reg
*
495 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
497 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch
))
501 struct packet_reg
*r
= &rsa
->regs
[regnum
];
502 gdb_assert (r
->regnum
== regnum
);
507 static struct packet_reg
*
508 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
511 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch
); i
++)
513 struct packet_reg
*r
= &rsa
->regs
[i
];
520 /* FIXME: graces/2002-08-08: These variables should eventually be
521 bound to an instance of the target object (as in gdbarch-tdep()),
522 when such a thing exists. */
524 /* This is set to the data address of the access causing the target
525 to stop for a watchpoint. */
526 static CORE_ADDR remote_watch_data_address
;
528 /* This is non-zero if target stopped for a watchpoint. */
529 static int remote_stopped_by_watchpoint_p
;
531 static struct target_ops remote_ops
;
533 static struct target_ops extended_remote_ops
;
535 static int remote_async_mask_value
= 1;
537 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
538 ``forever'' still use the normal timeout mechanism. This is
539 currently used by the ASYNC code to guarentee that target reads
540 during the initial connect always time-out. Once getpkt has been
541 modified to return a timeout indication and, in turn
542 remote_wait()/wait_for_inferior() have gained a timeout parameter
544 static int wait_forever_enabled_p
= 1;
547 /* This variable chooses whether to send a ^C or a break when the user
548 requests program interruption. Although ^C is usually what remote
549 systems expect, and that is the default here, sometimes a break is
550 preferable instead. */
552 static int remote_break
;
554 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
555 remote_open knows that we don't have a file open when the program
557 static struct serial
*remote_desc
= NULL
;
559 /* This variable sets the number of bits in an address that are to be
560 sent in a memory ("M" or "m") packet. Normally, after stripping
561 leading zeros, the entire address would be sent. This variable
562 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
563 initial implementation of remote.c restricted the address sent in
564 memory packets to ``host::sizeof long'' bytes - (typically 32
565 bits). Consequently, for 64 bit targets, the upper 32 bits of an
566 address was never sent. Since fixing this bug may cause a break in
567 some remote targets this variable is principly provided to
568 facilitate backward compatibility. */
570 static int remote_address_size
;
572 /* Temporary to track who currently owns the terminal. See
573 remote_terminal_* for more details. */
575 static int remote_async_terminal_ours_p
;
577 /* The executable file to use for "run" on the remote side. */
579 static char *remote_exec_file
= "";
582 /* User configurable variables for the number of characters in a
583 memory read/write packet. MIN (rsa->remote_packet_size,
584 rsa->sizeof_g_packet) is the default. Some targets need smaller
585 values (fifo overruns, et.al.) and some users need larger values
586 (speed up transfers). The variables ``preferred_*'' (the user
587 request), ``current_*'' (what was actually set) and ``forced_*''
588 (Positive - a soft limit, negative - a hard limit). */
590 struct memory_packet_config
597 /* Compute the current size of a read/write packet. Since this makes
598 use of ``actual_register_packet_size'' the computation is dynamic. */
601 get_memory_packet_size (struct memory_packet_config
*config
)
603 struct remote_state
*rs
= get_remote_state ();
604 struct remote_arch_state
*rsa
= get_remote_arch_state ();
606 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
607 law?) that some hosts don't cope very well with large alloca()
608 calls. Eventually the alloca() code will be replaced by calls to
609 xmalloc() and make_cleanups() allowing this restriction to either
610 be lifted or removed. */
611 #ifndef MAX_REMOTE_PACKET_SIZE
612 #define MAX_REMOTE_PACKET_SIZE 16384
614 /* NOTE: 20 ensures we can write at least one byte. */
615 #ifndef MIN_REMOTE_PACKET_SIZE
616 #define MIN_REMOTE_PACKET_SIZE 20
621 if (config
->size
<= 0)
622 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
624 what_they_get
= config
->size
;
628 what_they_get
= get_remote_packet_size ();
629 /* Limit the packet to the size specified by the user. */
631 && what_they_get
> config
->size
)
632 what_they_get
= config
->size
;
634 /* Limit it to the size of the targets ``g'' response unless we have
635 permission from the stub to use a larger packet size. */
636 if (rs
->explicit_packet_size
== 0
637 && rsa
->actual_register_packet_size
> 0
638 && what_they_get
> rsa
->actual_register_packet_size
)
639 what_they_get
= rsa
->actual_register_packet_size
;
641 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
642 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
643 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
644 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
646 /* Make sure there is room in the global buffer for this packet
647 (including its trailing NUL byte). */
648 if (rs
->buf_size
< what_they_get
+ 1)
650 rs
->buf_size
= 2 * what_they_get
;
651 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
654 return what_they_get
;
657 /* Update the size of a read/write packet. If they user wants
658 something really big then do a sanity check. */
661 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
663 int fixed_p
= config
->fixed_p
;
664 long size
= config
->size
;
666 error (_("Argument required (integer, `fixed' or `limited')."));
667 else if (strcmp (args
, "hard") == 0
668 || strcmp (args
, "fixed") == 0)
670 else if (strcmp (args
, "soft") == 0
671 || strcmp (args
, "limit") == 0)
676 size
= strtoul (args
, &end
, 0);
678 error (_("Invalid %s (bad syntax)."), config
->name
);
680 /* Instead of explicitly capping the size of a packet to
681 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
682 instead allowed to set the size to something arbitrarily
684 if (size
> MAX_REMOTE_PACKET_SIZE
)
685 error (_("Invalid %s (too large)."), config
->name
);
689 if (fixed_p
&& !config
->fixed_p
)
691 if (! query (_("The target may not be able to correctly handle a %s\n"
692 "of %ld bytes. Change the packet size? "),
694 error (_("Packet size not changed."));
696 /* Update the config. */
697 config
->fixed_p
= fixed_p
;
702 show_memory_packet_size (struct memory_packet_config
*config
)
704 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
706 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
707 get_memory_packet_size (config
));
709 printf_filtered (_("Packets are limited to %ld bytes.\n"),
710 get_memory_packet_size (config
));
713 static struct memory_packet_config memory_write_packet_config
=
715 "memory-write-packet-size",
719 set_memory_write_packet_size (char *args
, int from_tty
)
721 set_memory_packet_size (args
, &memory_write_packet_config
);
725 show_memory_write_packet_size (char *args
, int from_tty
)
727 show_memory_packet_size (&memory_write_packet_config
);
731 get_memory_write_packet_size (void)
733 return get_memory_packet_size (&memory_write_packet_config
);
736 static struct memory_packet_config memory_read_packet_config
=
738 "memory-read-packet-size",
742 set_memory_read_packet_size (char *args
, int from_tty
)
744 set_memory_packet_size (args
, &memory_read_packet_config
);
748 show_memory_read_packet_size (char *args
, int from_tty
)
750 show_memory_packet_size (&memory_read_packet_config
);
754 get_memory_read_packet_size (void)
756 long size
= get_memory_packet_size (&memory_read_packet_config
);
757 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
758 extra buffer size argument before the memory read size can be
759 increased beyond this. */
760 if (size
> get_remote_packet_size ())
761 size
= get_remote_packet_size ();
766 /* Generic configuration support for packets the stub optionally
767 supports. Allows the user to specify the use of the packet as well
768 as allowing GDB to auto-detect support in the remote stub. */
772 PACKET_SUPPORT_UNKNOWN
= 0,
781 enum auto_boolean detect
;
782 enum packet_support support
;
785 /* Analyze a packet's return value and update the packet config
796 update_packet_config (struct packet_config
*config
)
798 switch (config
->detect
)
800 case AUTO_BOOLEAN_TRUE
:
801 config
->support
= PACKET_ENABLE
;
803 case AUTO_BOOLEAN_FALSE
:
804 config
->support
= PACKET_DISABLE
;
806 case AUTO_BOOLEAN_AUTO
:
807 config
->support
= PACKET_SUPPORT_UNKNOWN
;
813 show_packet_config_cmd (struct packet_config
*config
)
815 char *support
= "internal-error";
816 switch (config
->support
)
822 support
= "disabled";
824 case PACKET_SUPPORT_UNKNOWN
:
828 switch (config
->detect
)
830 case AUTO_BOOLEAN_AUTO
:
831 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
832 config
->name
, support
);
834 case AUTO_BOOLEAN_TRUE
:
835 case AUTO_BOOLEAN_FALSE
:
836 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
837 config
->name
, support
);
843 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
844 const char *title
, int legacy
)
851 config
->title
= title
;
852 config
->detect
= AUTO_BOOLEAN_AUTO
;
853 config
->support
= PACKET_SUPPORT_UNKNOWN
;
854 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
856 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
858 /* set/show TITLE-packet {auto,on,off} */
859 cmd_name
= xstrprintf ("%s-packet", title
);
860 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
861 &config
->detect
, set_doc
, show_doc
, NULL
, /* help_doc */
862 set_remote_protocol_packet_cmd
,
863 show_remote_protocol_packet_cmd
,
864 &remote_set_cmdlist
, &remote_show_cmdlist
);
865 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
869 legacy_name
= xstrprintf ("%s-packet", name
);
870 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
871 &remote_set_cmdlist
);
872 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
873 &remote_show_cmdlist
);
877 static enum packet_result
878 packet_check_result (const char *buf
)
882 /* The stub recognized the packet request. Check that the
883 operation succeeded. */
885 && isxdigit (buf
[1]) && isxdigit (buf
[2])
887 /* "Enn" - definitly an error. */
890 /* Always treat "E." as an error. This will be used for
891 more verbose error messages, such as E.memtypes. */
892 if (buf
[0] == 'E' && buf
[1] == '.')
895 /* The packet may or may not be OK. Just assume it is. */
899 /* The stub does not support the packet. */
900 return PACKET_UNKNOWN
;
903 static enum packet_result
904 packet_ok (const char *buf
, struct packet_config
*config
)
906 enum packet_result result
;
908 result
= packet_check_result (buf
);
913 /* The stub recognized the packet request. */
914 switch (config
->support
)
916 case PACKET_SUPPORT_UNKNOWN
:
918 fprintf_unfiltered (gdb_stdlog
,
919 "Packet %s (%s) is supported\n",
920 config
->name
, config
->title
);
921 config
->support
= PACKET_ENABLE
;
924 internal_error (__FILE__
, __LINE__
,
925 _("packet_ok: attempt to use a disabled packet"));
932 /* The stub does not support the packet. */
933 switch (config
->support
)
936 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
937 /* If the stub previously indicated that the packet was
938 supported then there is a protocol error.. */
939 error (_("Protocol error: %s (%s) conflicting enabled responses."),
940 config
->name
, config
->title
);
942 /* The user set it wrong. */
943 error (_("Enabled packet %s (%s) not recognized by stub"),
944 config
->name
, config
->title
);
946 case PACKET_SUPPORT_UNKNOWN
:
948 fprintf_unfiltered (gdb_stdlog
,
949 "Packet %s (%s) is NOT supported\n",
950 config
->name
, config
->title
);
951 config
->support
= PACKET_DISABLE
;
979 PACKET_qXfer_features
,
980 PACKET_qXfer_libraries
,
981 PACKET_qXfer_memory_map
,
982 PACKET_qXfer_spu_read
,
983 PACKET_qXfer_spu_write
,
988 PACKET_qSearch_memory
,
991 PACKET_QStartNoAckMode
,
993 PACKET_qXfer_siginfo_read
,
994 PACKET_qXfer_siginfo_write
,
999 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1002 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
1003 struct cmd_list_element
*c
)
1005 struct packet_config
*packet
;
1007 for (packet
= remote_protocol_packets
;
1008 packet
< &remote_protocol_packets
[PACKET_MAX
];
1011 if (&packet
->detect
== c
->var
)
1013 update_packet_config (packet
);
1017 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1022 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1023 struct cmd_list_element
*c
,
1026 struct packet_config
*packet
;
1028 for (packet
= remote_protocol_packets
;
1029 packet
< &remote_protocol_packets
[PACKET_MAX
];
1032 if (&packet
->detect
== c
->var
)
1034 show_packet_config_cmd (packet
);
1038 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1042 /* Should we try one of the 'Z' requests? */
1046 Z_PACKET_SOFTWARE_BP
,
1047 Z_PACKET_HARDWARE_BP
,
1054 /* For compatibility with older distributions. Provide a ``set remote
1055 Z-packet ...'' command that updates all the Z packet types. */
1057 static enum auto_boolean remote_Z_packet_detect
;
1060 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1061 struct cmd_list_element
*c
)
1064 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1066 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1067 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1072 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1073 struct cmd_list_element
*c
,
1077 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1079 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1083 /* Should we try the 'ThreadInfo' query packet?
1085 This variable (NOT available to the user: auto-detect only!)
1086 determines whether GDB will use the new, simpler "ThreadInfo"
1087 query or the older, more complex syntax for thread queries.
1088 This is an auto-detect variable (set to true at each connect,
1089 and set to false when the target fails to recognize it). */
1091 static int use_threadinfo_query
;
1092 static int use_threadextra_query
;
1094 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1095 static struct async_signal_handler
*sigint_remote_twice_token
;
1096 static struct async_signal_handler
*sigint_remote_token
;
1099 /* Asynchronous signal handle registered as event loop source for
1100 when we have pending events ready to be passed to the core. */
1102 static struct async_event_handler
*remote_async_inferior_event_token
;
1104 /* Asynchronous signal handle registered as event loop source for when
1105 the remote sent us a %Stop notification. The registered callback
1106 will do a vStopped sequence to pull the rest of the events out of
1107 the remote side into our event queue. */
1109 static struct async_event_handler
*remote_async_get_pending_events_token
;
1112 static ptid_t magic_null_ptid
;
1113 static ptid_t not_sent_ptid
;
1114 static ptid_t any_thread_ptid
;
1116 /* These are the threads which we last sent to the remote system. The
1117 TID member will be -1 for all or -2 for not sent yet. */
1119 static ptid_t general_thread
;
1120 static ptid_t continue_thread
;
1122 /* Find out if the stub attached to PID (and hence GDB should offer to
1123 detach instead of killing it when bailing out). */
1126 remote_query_attached (int pid
)
1128 struct remote_state
*rs
= get_remote_state ();
1130 if (remote_protocol_packets
[PACKET_qAttached
].support
== PACKET_DISABLE
)
1133 if (remote_multi_process_p (rs
))
1134 sprintf (rs
->buf
, "qAttached:%x", pid
);
1136 sprintf (rs
->buf
, "qAttached");
1139 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1141 switch (packet_ok (rs
->buf
,
1142 &remote_protocol_packets
[PACKET_qAttached
]))
1145 if (strcmp (rs
->buf
, "1") == 0)
1149 warning (_("Remote failure reply: %s"), rs
->buf
);
1151 case PACKET_UNKNOWN
:
1158 /* Add PID to GDB's inferior table. Since we can be connected to a
1159 remote system before before knowing about any inferior, mark the
1160 target with execution when we find the first inferior. If ATTACHED
1161 is 1, then we had just attached to this inferior. If it is 0, then
1162 we just created this inferior. If it is -1, then try querying the
1163 remote stub to find out if it had attached to the inferior or
1166 static struct inferior
*
1167 remote_add_inferior (int pid
, int attached
)
1169 struct remote_state
*rs
= get_remote_state ();
1170 struct inferior
*inf
;
1172 /* Check whether this process we're learning about is to be
1173 considered attached, or if is to be considered to have been
1174 spawned by the stub. */
1176 attached
= remote_query_attached (pid
);
1178 inf
= add_inferior (pid
);
1180 inf
->attach_flag
= attached
;
1185 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1186 according to RUNNING. */
1189 remote_add_thread (ptid_t ptid
, int running
)
1193 set_executing (ptid
, running
);
1194 set_running (ptid
, running
);
1197 /* Come here when we learn about a thread id from the remote target.
1198 It may be the first time we hear about such thread, so take the
1199 opportunity to add it to GDB's thread list. In case this is the
1200 first time we're noticing its corresponding inferior, add it to
1201 GDB's inferior list as well. */
1204 remote_notice_new_inferior (ptid_t currthread
, int running
)
1206 struct remote_state
*rs
= get_remote_state ();
1208 /* If this is a new thread, add it to GDB's thread list.
1209 If we leave it up to WFI to do this, bad things will happen. */
1211 if (in_thread_list (currthread
) && is_exited (currthread
))
1213 /* We're seeing an event on a thread id we knew had exited.
1214 This has to be a new thread reusing the old id. Add it. */
1215 remote_add_thread (currthread
, running
);
1219 if (!in_thread_list (currthread
))
1221 struct inferior
*inf
= NULL
;
1222 int pid
= ptid_get_pid (currthread
);
1224 if (ptid_is_pid (inferior_ptid
)
1225 && pid
== ptid_get_pid (inferior_ptid
))
1227 /* inferior_ptid has no thread member yet. This can happen
1228 with the vAttach -> remote_wait,"TAAthread:" path if the
1229 stub doesn't support qC. This is the first stop reported
1230 after an attach, so this is the main thread. Update the
1231 ptid in the thread list. */
1232 if (in_thread_list (pid_to_ptid (pid
)))
1233 thread_change_ptid (inferior_ptid
, currthread
);
1236 remote_add_thread (currthread
, running
);
1237 inferior_ptid
= currthread
;
1242 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1244 /* inferior_ptid is not set yet. This can happen with the
1245 vRun -> remote_wait,"TAAthread:" path if the stub
1246 doesn't support qC. This is the first stop reported
1247 after an attach, so this is the main thread. Update the
1248 ptid in the thread list. */
1249 thread_change_ptid (inferior_ptid
, currthread
);
1253 /* When connecting to a target remote, or to a target
1254 extended-remote which already was debugging an inferior, we
1255 may not know about it yet. Add it before adding its child
1256 thread, so notifications are emitted in a sensible order. */
1257 if (!in_inferior_list (ptid_get_pid (currthread
)))
1258 inf
= remote_add_inferior (ptid_get_pid (currthread
), -1);
1260 /* This is really a new thread. Add it. */
1261 remote_add_thread (currthread
, running
);
1263 /* If we found a new inferior, let the common code do whatever
1264 it needs to with it (e.g., read shared libraries, insert
1267 notice_new_inferior (currthread
, running
, 0);
1271 /* Call this function as a result of
1272 1) A halt indication (T packet) containing a thread id
1273 2) A direct query of currthread
1274 3) Successful execution of set thread
1278 record_currthread (ptid_t currthread
)
1280 general_thread
= currthread
;
1282 if (ptid_equal (currthread
, minus_one_ptid
))
1283 /* We're just invalidating the local thread mirror. */
1286 remote_notice_new_inferior (currthread
, 0);
1289 static char *last_pass_packet
;
1291 /* If 'QPassSignals' is supported, tell the remote stub what signals
1292 it can simply pass through to the inferior without reporting. */
1295 remote_pass_signals (void)
1297 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1299 char *pass_packet
, *p
;
1300 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1303 gdb_assert (numsigs
< 256);
1304 for (i
= 0; i
< numsigs
; i
++)
1306 if (signal_stop_state (i
) == 0
1307 && signal_print_state (i
) == 0
1308 && signal_pass_state (i
) == 1)
1311 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1312 strcpy (pass_packet
, "QPassSignals:");
1313 p
= pass_packet
+ strlen (pass_packet
);
1314 for (i
= 0; i
< numsigs
; i
++)
1316 if (signal_stop_state (i
) == 0
1317 && signal_print_state (i
) == 0
1318 && signal_pass_state (i
) == 1)
1321 *p
++ = tohex (i
>> 4);
1322 *p
++ = tohex (i
& 15);
1331 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1333 struct remote_state
*rs
= get_remote_state ();
1334 char *buf
= rs
->buf
;
1336 putpkt (pass_packet
);
1337 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1338 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1339 if (last_pass_packet
)
1340 xfree (last_pass_packet
);
1341 last_pass_packet
= pass_packet
;
1344 xfree (pass_packet
);
1348 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1349 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1350 thread. If GEN is set, set the general thread, if not, then set
1351 the step/continue thread. */
1353 set_thread (struct ptid ptid
, int gen
)
1355 struct remote_state
*rs
= get_remote_state ();
1356 ptid_t state
= gen
? general_thread
: continue_thread
;
1357 char *buf
= rs
->buf
;
1358 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
1360 if (ptid_equal (state
, ptid
))
1364 *buf
++ = gen
? 'g' : 'c';
1365 if (ptid_equal (ptid
, magic_null_ptid
))
1366 xsnprintf (buf
, endbuf
- buf
, "0");
1367 else if (ptid_equal (ptid
, any_thread_ptid
))
1368 xsnprintf (buf
, endbuf
- buf
, "0");
1369 else if (ptid_equal (ptid
, minus_one_ptid
))
1370 xsnprintf (buf
, endbuf
- buf
, "-1");
1372 write_ptid (buf
, endbuf
, ptid
);
1374 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1376 general_thread
= ptid
;
1378 continue_thread
= ptid
;
1382 set_general_thread (struct ptid ptid
)
1384 set_thread (ptid
, 1);
1388 set_continue_thread (struct ptid ptid
)
1390 set_thread (ptid
, 0);
1393 /* Change the remote current process. Which thread within the process
1394 ends up selected isn't important, as long as it is the same process
1395 as what INFERIOR_PTID points to.
1397 This comes from that fact that there is no explicit notion of
1398 "selected process" in the protocol. The selected process for
1399 general operations is the process the selected general thread
1403 set_general_process (void)
1405 struct remote_state
*rs
= get_remote_state ();
1407 /* If the remote can't handle multiple processes, don't bother. */
1408 if (!remote_multi_process_p (rs
))
1411 /* We only need to change the remote current thread if it's pointing
1412 at some other process. */
1413 if (ptid_get_pid (general_thread
) != ptid_get_pid (inferior_ptid
))
1414 set_general_thread (inferior_ptid
);
1418 /* Return nonzero if the thread PTID is still alive on the remote
1422 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
1424 struct remote_state
*rs
= get_remote_state ();
1425 int tid
= ptid_get_tid (ptid
);
1428 if (ptid_equal (ptid
, magic_null_ptid
))
1429 /* The main thread is always alive. */
1432 if (ptid_get_pid (ptid
) != 0 && ptid_get_tid (ptid
) == 0)
1433 /* The main thread is always alive. This can happen after a
1434 vAttach, if the remote side doesn't support
1439 endp
= rs
->buf
+ get_remote_packet_size ();
1442 write_ptid (p
, endp
, ptid
);
1445 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1446 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1449 /* About these extended threadlist and threadinfo packets. They are
1450 variable length packets but, the fields within them are often fixed
1451 length. They are redundent enough to send over UDP as is the
1452 remote protocol in general. There is a matching unit test module
1455 #define OPAQUETHREADBYTES 8
1457 /* a 64 bit opaque identifier */
1458 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1460 /* WARNING: This threadref data structure comes from the remote O.S.,
1461 libstub protocol encoding, and remote.c. it is not particularly
1464 /* Right now, the internal structure is int. We want it to be bigger.
1468 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1470 /* gdb_ext_thread_info is an internal GDB data structure which is
1471 equivalent to the reply of the remote threadinfo packet. */
1473 struct gdb_ext_thread_info
1475 threadref threadid
; /* External form of thread reference. */
1476 int active
; /* Has state interesting to GDB?
1478 char display
[256]; /* Brief state display, name,
1479 blocked/suspended. */
1480 char shortname
[32]; /* To be used to name threads. */
1481 char more_display
[256]; /* Long info, statistics, queue depth,
1485 /* The volume of remote transfers can be limited by submitting
1486 a mask containing bits specifying the desired information.
1487 Use a union of these values as the 'selection' parameter to
1488 get_thread_info. FIXME: Make these TAG names more thread specific.
1491 #define TAG_THREADID 1
1492 #define TAG_EXISTS 2
1493 #define TAG_DISPLAY 4
1494 #define TAG_THREADNAME 8
1495 #define TAG_MOREDISPLAY 16
1497 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1499 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1501 static char *unpack_nibble (char *buf
, int *val
);
1503 static char *pack_nibble (char *buf
, int nibble
);
1505 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1507 static char *unpack_byte (char *buf
, int *value
);
1509 static char *pack_int (char *buf
, int value
);
1511 static char *unpack_int (char *buf
, int *value
);
1513 static char *unpack_string (char *src
, char *dest
, int length
);
1515 static char *pack_threadid (char *pkt
, threadref
*id
);
1517 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1519 void int_to_threadref (threadref
*id
, int value
);
1521 static int threadref_to_int (threadref
*ref
);
1523 static void copy_threadref (threadref
*dest
, threadref
*src
);
1525 static int threadmatch (threadref
*dest
, threadref
*src
);
1527 static char *pack_threadinfo_request (char *pkt
, int mode
,
1530 static int remote_unpack_thread_info_response (char *pkt
,
1531 threadref
*expectedref
,
1532 struct gdb_ext_thread_info
1536 static int remote_get_threadinfo (threadref
*threadid
,
1537 int fieldset
, /*TAG mask */
1538 struct gdb_ext_thread_info
*info
);
1540 static char *pack_threadlist_request (char *pkt
, int startflag
,
1542 threadref
*nextthread
);
1544 static int parse_threadlist_response (char *pkt
,
1546 threadref
*original_echo
,
1547 threadref
*resultlist
,
1550 static int remote_get_threadlist (int startflag
,
1551 threadref
*nextthread
,
1555 threadref
*threadlist
);
1557 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1559 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1560 void *context
, int looplimit
);
1562 static int remote_newthread_step (threadref
*ref
, void *context
);
1565 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1566 buffer we're allowed to write to. Returns
1567 BUF+CHARACTERS_WRITTEN. */
1570 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
1573 struct remote_state
*rs
= get_remote_state ();
1575 if (remote_multi_process_p (rs
))
1577 pid
= ptid_get_pid (ptid
);
1579 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
1581 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
1583 tid
= ptid_get_tid (ptid
);
1585 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
1587 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
1592 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1593 passed the last parsed char. Returns null_ptid on error. */
1596 read_ptid (char *buf
, char **obuf
)
1600 ULONGEST pid
= 0, tid
= 0;
1605 /* Multi-process ptid. */
1606 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1608 error (_("invalid remote ptid: %s\n"), p
);
1611 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1614 return ptid_build (pid
, 0, tid
);
1617 /* No multi-process. Just a tid. */
1618 pp
= unpack_varlen_hex (p
, &tid
);
1620 /* Since the stub is not sending a process id, then default to
1621 what's in inferior_ptid, unless it's null at this point. If so,
1622 then since there's no way to know the pid of the reported
1623 threads, use the magic number. */
1624 if (ptid_equal (inferior_ptid
, null_ptid
))
1625 pid
= ptid_get_pid (magic_null_ptid
);
1627 pid
= ptid_get_pid (inferior_ptid
);
1631 return ptid_build (pid
, 0, tid
);
1634 /* Encode 64 bits in 16 chars of hex. */
1636 static const char hexchars
[] = "0123456789abcdef";
1639 ishex (int ch
, int *val
)
1641 if ((ch
>= 'a') && (ch
<= 'f'))
1643 *val
= ch
- 'a' + 10;
1646 if ((ch
>= 'A') && (ch
<= 'F'))
1648 *val
= ch
- 'A' + 10;
1651 if ((ch
>= '0') && (ch
<= '9'))
1662 if (ch
>= 'a' && ch
<= 'f')
1663 return ch
- 'a' + 10;
1664 if (ch
>= '0' && ch
<= '9')
1666 if (ch
>= 'A' && ch
<= 'F')
1667 return ch
- 'A' + 10;
1672 stub_unpack_int (char *buff
, int fieldlength
)
1679 nibble
= stubhex (*buff
++);
1683 retval
= retval
<< 4;
1689 unpack_varlen_hex (char *buff
, /* packet to parse */
1693 ULONGEST retval
= 0;
1695 while (ishex (*buff
, &nibble
))
1698 retval
= retval
<< 4;
1699 retval
|= nibble
& 0x0f;
1706 unpack_nibble (char *buf
, int *val
)
1708 *val
= fromhex (*buf
++);
1713 pack_nibble (char *buf
, int nibble
)
1715 *buf
++ = hexchars
[(nibble
& 0x0f)];
1720 pack_hex_byte (char *pkt
, int byte
)
1722 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1723 *pkt
++ = hexchars
[(byte
& 0xf)];
1728 unpack_byte (char *buf
, int *value
)
1730 *value
= stub_unpack_int (buf
, 2);
1735 pack_int (char *buf
, int value
)
1737 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1738 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1739 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1740 buf
= pack_hex_byte (buf
, (value
& 0xff));
1745 unpack_int (char *buf
, int *value
)
1747 *value
= stub_unpack_int (buf
, 8);
1751 #if 0 /* Currently unused, uncomment when needed. */
1752 static char *pack_string (char *pkt
, char *string
);
1755 pack_string (char *pkt
, char *string
)
1760 len
= strlen (string
);
1762 len
= 200; /* Bigger than most GDB packets, junk??? */
1763 pkt
= pack_hex_byte (pkt
, len
);
1767 if ((ch
== '\0') || (ch
== '#'))
1768 ch
= '*'; /* Protect encapsulation. */
1773 #endif /* 0 (unused) */
1776 unpack_string (char *src
, char *dest
, int length
)
1785 pack_threadid (char *pkt
, threadref
*id
)
1788 unsigned char *altid
;
1790 altid
= (unsigned char *) id
;
1791 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1793 pkt
= pack_hex_byte (pkt
, *altid
++);
1799 unpack_threadid (char *inbuf
, threadref
*id
)
1802 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1805 altref
= (char *) id
;
1807 while (inbuf
< limit
)
1809 x
= stubhex (*inbuf
++);
1810 y
= stubhex (*inbuf
++);
1811 *altref
++ = (x
<< 4) | y
;
1816 /* Externally, threadrefs are 64 bits but internally, they are still
1817 ints. This is due to a mismatch of specifications. We would like
1818 to use 64bit thread references internally. This is an adapter
1822 int_to_threadref (threadref
*id
, int value
)
1824 unsigned char *scan
;
1826 scan
= (unsigned char *) id
;
1832 *scan
++ = (value
>> 24) & 0xff;
1833 *scan
++ = (value
>> 16) & 0xff;
1834 *scan
++ = (value
>> 8) & 0xff;
1835 *scan
++ = (value
& 0xff);
1839 threadref_to_int (threadref
*ref
)
1842 unsigned char *scan
;
1848 value
= (value
<< 8) | ((*scan
++) & 0xff);
1853 copy_threadref (threadref
*dest
, threadref
*src
)
1856 unsigned char *csrc
, *cdest
;
1858 csrc
= (unsigned char *) src
;
1859 cdest
= (unsigned char *) dest
;
1866 threadmatch (threadref
*dest
, threadref
*src
)
1868 /* Things are broken right now, so just assume we got a match. */
1870 unsigned char *srcp
, *destp
;
1872 srcp
= (char *) src
;
1873 destp
= (char *) dest
;
1877 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1884 threadid:1, # always request threadid
1891 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1894 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1896 *pkt
++ = 'q'; /* Info Query */
1897 *pkt
++ = 'P'; /* process or thread info */
1898 pkt
= pack_int (pkt
, mode
); /* mode */
1899 pkt
= pack_threadid (pkt
, id
); /* threadid */
1900 *pkt
= '\0'; /* terminate */
1904 /* These values tag the fields in a thread info response packet. */
1905 /* Tagging the fields allows us to request specific fields and to
1906 add more fields as time goes by. */
1908 #define TAG_THREADID 1 /* Echo the thread identifier. */
1909 #define TAG_EXISTS 2 /* Is this process defined enough to
1910 fetch registers and its stack? */
1911 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1912 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1913 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1917 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1918 struct gdb_ext_thread_info
*info
)
1920 struct remote_state
*rs
= get_remote_state ();
1924 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1927 /* info->threadid = 0; FIXME: implement zero_threadref. */
1929 info
->display
[0] = '\0';
1930 info
->shortname
[0] = '\0';
1931 info
->more_display
[0] = '\0';
1933 /* Assume the characters indicating the packet type have been
1935 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1936 pkt
= unpack_threadid (pkt
, &ref
);
1939 warning (_("Incomplete response to threadinfo request."));
1940 if (!threadmatch (&ref
, expectedref
))
1941 { /* This is an answer to a different request. */
1942 warning (_("ERROR RMT Thread info mismatch."));
1945 copy_threadref (&info
->threadid
, &ref
);
1947 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1949 /* Packets are terminated with nulls. */
1950 while ((pkt
< limit
) && mask
&& *pkt
)
1952 pkt
= unpack_int (pkt
, &tag
); /* tag */
1953 pkt
= unpack_byte (pkt
, &length
); /* length */
1954 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1956 warning (_("ERROR RMT: threadinfo tag mismatch."));
1960 if (tag
== TAG_THREADID
)
1964 warning (_("ERROR RMT: length of threadid is not 16."));
1968 pkt
= unpack_threadid (pkt
, &ref
);
1969 mask
= mask
& ~TAG_THREADID
;
1972 if (tag
== TAG_EXISTS
)
1974 info
->active
= stub_unpack_int (pkt
, length
);
1976 mask
= mask
& ~(TAG_EXISTS
);
1979 warning (_("ERROR RMT: 'exists' length too long."));
1985 if (tag
== TAG_THREADNAME
)
1987 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1988 mask
= mask
& ~TAG_THREADNAME
;
1991 if (tag
== TAG_DISPLAY
)
1993 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1994 mask
= mask
& ~TAG_DISPLAY
;
1997 if (tag
== TAG_MOREDISPLAY
)
1999 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2000 mask
= mask
& ~TAG_MOREDISPLAY
;
2003 warning (_("ERROR RMT: unknown thread info tag."));
2004 break; /* Not a tag we know about. */
2010 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2011 struct gdb_ext_thread_info
*info
)
2013 struct remote_state
*rs
= get_remote_state ();
2016 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2018 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2020 if (rs
->buf
[0] == '\0')
2023 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2028 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2031 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2032 threadref
*nextthread
)
2034 *pkt
++ = 'q'; /* info query packet */
2035 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2036 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2037 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2038 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2043 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2046 parse_threadlist_response (char *pkt
, int result_limit
,
2047 threadref
*original_echo
, threadref
*resultlist
,
2050 struct remote_state
*rs
= get_remote_state ();
2052 int count
, resultcount
, done
;
2055 /* Assume the 'q' and 'M chars have been stripped. */
2056 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2057 /* done parse past here */
2058 pkt
= unpack_byte (pkt
, &count
); /* count field */
2059 pkt
= unpack_nibble (pkt
, &done
);
2060 /* The first threadid is the argument threadid. */
2061 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2062 while ((count
-- > 0) && (pkt
< limit
))
2064 pkt
= unpack_threadid (pkt
, resultlist
++);
2065 if (resultcount
++ >= result_limit
)
2074 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2075 int *done
, int *result_count
, threadref
*threadlist
)
2077 struct remote_state
*rs
= get_remote_state ();
2078 static threadref echo_nextthread
;
2081 /* Trancate result limit to be smaller than the packet size. */
2082 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
2083 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2085 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2087 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2089 if (*rs
->buf
== '\0')
2093 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
2096 if (!threadmatch (&echo_nextthread
, nextthread
))
2098 /* FIXME: This is a good reason to drop the packet. */
2099 /* Possably, there is a duplicate response. */
2101 retransmit immediatly - race conditions
2102 retransmit after timeout - yes
2104 wait for packet, then exit
2106 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2107 return 0; /* I choose simply exiting. */
2109 if (*result_count
<= 0)
2113 warning (_("RMT ERROR : failed to get remote thread list."));
2116 return result
; /* break; */
2118 if (*result_count
> result_limit
)
2121 warning (_("RMT ERROR: threadlist response longer than requested."));
2127 /* This is the interface between remote and threads, remotes upper
2130 /* remote_find_new_threads retrieves the thread list and for each
2131 thread in the list, looks up the thread in GDB's internal list,
2132 adding the thread if it does not already exist. This involves
2133 getting partial thread lists from the remote target so, polling the
2134 quit_flag is required. */
2137 /* About this many threadisds fit in a packet. */
2139 #define MAXTHREADLISTRESULTS 32
2142 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2145 int done
, i
, result_count
;
2149 static threadref nextthread
;
2150 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
2155 if (loopcount
++ > looplimit
)
2158 warning (_("Remote fetch threadlist -infinite loop-."));
2161 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
2162 &done
, &result_count
, resultthreadlist
))
2167 /* Clear for later iterations. */
2169 /* Setup to resume next batch of thread references, set nextthread. */
2170 if (result_count
>= 1)
2171 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2173 while (result_count
--)
2174 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2181 remote_newthread_step (threadref
*ref
, void *context
)
2183 int pid
= ptid_get_pid (inferior_ptid
);
2184 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2186 if (!in_thread_list (ptid
))
2188 return 1; /* continue iterator */
2191 #define CRAZY_MAX_THREADS 1000
2194 remote_current_thread (ptid_t oldpid
)
2196 struct remote_state
*rs
= get_remote_state ();
2202 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2203 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2204 return read_ptid (&rs
->buf
[2], NULL
);
2209 /* Find new threads for info threads command.
2210 * Original version, using John Metzler's thread protocol.
2214 remote_find_new_threads (void)
2216 remote_threadlist_iterator (remote_newthread_step
, 0,
2221 * Find all threads for info threads command.
2222 * Uses new thread protocol contributed by Cisco.
2223 * Falls back and attempts to use the older method (above)
2224 * if the target doesn't respond to the new method.
2228 remote_threads_info (struct target_ops
*ops
)
2230 struct remote_state
*rs
= get_remote_state ();
2234 if (remote_desc
== 0) /* paranoia */
2235 error (_("Command can only be used when connected to the remote target."));
2237 if (use_threadinfo_query
)
2239 putpkt ("qfThreadInfo");
2240 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2242 if (bufp
[0] != '\0') /* q packet recognized */
2244 while (*bufp
++ == 'm') /* reply contains one or more TID */
2248 new_thread
= read_ptid (bufp
, &bufp
);
2249 if (!ptid_equal (new_thread
, null_ptid
))
2251 /* In non-stop mode, we assume new found threads
2252 are running until proven otherwise with a
2253 stop reply. In all-stop, we can only get
2254 here if all threads are stopped. */
2255 int running
= non_stop
? 1 : 0;
2257 remote_notice_new_inferior (new_thread
, running
);
2260 while (*bufp
++ == ','); /* comma-separated list */
2261 putpkt ("qsThreadInfo");
2262 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2269 /* Only qfThreadInfo is supported in non-stop mode. */
2273 /* Else fall back to old method based on jmetzler protocol. */
2274 use_threadinfo_query
= 0;
2275 remote_find_new_threads ();
2280 * Collect a descriptive string about the given thread.
2281 * The target may say anything it wants to about the thread
2282 * (typically info about its blocked / runnable state, name, etc.).
2283 * This string will appear in the info threads display.
2285 * Optional: targets are not required to implement this function.
2289 remote_threads_extra_info (struct thread_info
*tp
)
2291 struct remote_state
*rs
= get_remote_state ();
2295 struct gdb_ext_thread_info threadinfo
;
2296 static char display_buf
[100]; /* arbitrary... */
2297 int n
= 0; /* position in display_buf */
2299 if (remote_desc
== 0) /* paranoia */
2300 internal_error (__FILE__
, __LINE__
,
2301 _("remote_threads_extra_info"));
2303 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2304 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2305 /* This is the main thread which was added by GDB. The remote
2306 server doesn't know about it. */
2309 if (use_threadextra_query
)
2312 char *endb
= rs
->buf
+ get_remote_packet_size ();
2314 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2316 write_ptid (b
, endb
, tp
->ptid
);
2319 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2320 if (rs
->buf
[0] != 0)
2322 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2323 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2324 display_buf
[result
] = '\0';
2329 /* If the above query fails, fall back to the old method. */
2330 use_threadextra_query
= 0;
2331 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2332 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2333 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2334 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2335 if (threadinfo
.active
)
2337 if (*threadinfo
.shortname
)
2338 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2339 " Name: %s,", threadinfo
.shortname
);
2340 if (*threadinfo
.display
)
2341 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2342 " State: %s,", threadinfo
.display
);
2343 if (*threadinfo
.more_display
)
2344 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2345 " Priority: %s", threadinfo
.more_display
);
2349 /* For purely cosmetic reasons, clear up trailing commas. */
2350 if (',' == display_buf
[n
-1])
2351 display_buf
[n
-1] = ' ';
2359 /* Restart the remote side; this is an extended protocol operation. */
2362 extended_remote_restart (void)
2364 struct remote_state
*rs
= get_remote_state ();
2366 /* Send the restart command; for reasons I don't understand the
2367 remote side really expects a number after the "R". */
2368 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2371 remote_fileio_reset ();
2374 /* Clean up connection to a remote debugger. */
2377 remote_close (int quitting
)
2379 if (remote_desc
== NULL
)
2380 return; /* already closed */
2382 /* Make sure we leave stdin registered in the event loop, and we
2383 don't leave the async SIGINT signal handler installed. */
2384 remote_terminal_ours ();
2386 serial_close (remote_desc
);
2389 /* We don't have a connection to the remote stub anymore. Get rid
2390 of all the inferiors and their threads we were controlling. */
2391 discard_all_inferiors ();
2393 /* We're no longer interested in any of these events. */
2394 discard_pending_stop_replies (-1);
2396 if (remote_async_inferior_event_token
)
2397 delete_async_event_handler (&remote_async_inferior_event_token
);
2398 if (remote_async_get_pending_events_token
)
2399 delete_async_event_handler (&remote_async_get_pending_events_token
);
2402 /* Query the remote side for the text, data and bss offsets. */
2407 struct remote_state
*rs
= get_remote_state ();
2410 int lose
, num_segments
= 0, do_sections
, do_segments
;
2411 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2412 struct section_offsets
*offs
;
2413 struct symfile_segment_data
*data
;
2415 if (symfile_objfile
== NULL
)
2418 putpkt ("qOffsets");
2419 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2422 if (buf
[0] == '\000')
2423 return; /* Return silently. Stub doesn't support
2427 warning (_("Remote failure reply: %s"), buf
);
2431 /* Pick up each field in turn. This used to be done with scanf, but
2432 scanf will make trouble if CORE_ADDR size doesn't match
2433 conversion directives correctly. The following code will work
2434 with any size of CORE_ADDR. */
2435 text_addr
= data_addr
= bss_addr
= 0;
2439 if (strncmp (ptr
, "Text=", 5) == 0)
2442 /* Don't use strtol, could lose on big values. */
2443 while (*ptr
&& *ptr
!= ';')
2444 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2446 if (strncmp (ptr
, ";Data=", 6) == 0)
2449 while (*ptr
&& *ptr
!= ';')
2450 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2455 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2458 while (*ptr
&& *ptr
!= ';')
2459 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2461 if (bss_addr
!= data_addr
)
2462 warning (_("Target reported unsupported offsets: %s"), buf
);
2467 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
2470 /* Don't use strtol, could lose on big values. */
2471 while (*ptr
&& *ptr
!= ';')
2472 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2475 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
2478 while (*ptr
&& *ptr
!= ';')
2479 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2487 error (_("Malformed response to offset query, %s"), buf
);
2488 else if (*ptr
!= '\0')
2489 warning (_("Target reported unsupported offsets: %s"), buf
);
2491 offs
= ((struct section_offsets
*)
2492 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2493 memcpy (offs
, symfile_objfile
->section_offsets
,
2494 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2496 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
2497 do_segments
= (data
!= NULL
);
2498 do_sections
= num_segments
== 0;
2500 if (num_segments
> 0)
2502 segments
[0] = text_addr
;
2503 segments
[1] = data_addr
;
2505 /* If we have two segments, we can still try to relocate everything
2506 by assuming that the .text and .data offsets apply to the whole
2507 text and data segments. Convert the offsets given in the packet
2508 to base addresses for symfile_map_offsets_to_segments. */
2509 else if (data
&& data
->num_segments
== 2)
2511 segments
[0] = data
->segment_bases
[0] + text_addr
;
2512 segments
[1] = data
->segment_bases
[1] + data_addr
;
2515 /* If the object file has only one segment, assume that it is text
2516 rather than data; main programs with no writable data are rare,
2517 but programs with no code are useless. Of course the code might
2518 have ended up in the data segment... to detect that we would need
2519 the permissions here. */
2520 else if (data
&& data
->num_segments
== 1)
2522 segments
[0] = data
->segment_bases
[0] + text_addr
;
2525 /* There's no way to relocate by segment. */
2531 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
2532 offs
, num_segments
, segments
);
2534 if (ret
== 0 && !do_sections
)
2535 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2542 free_symfile_segment_data (data
);
2546 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2548 /* This is a temporary kludge to force data and bss to use the same offsets
2549 because that's what nlmconv does now. The real solution requires changes
2550 to the stub and remote.c that I don't have time to do right now. */
2552 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2553 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2556 objfile_relocate (symfile_objfile
, offs
);
2559 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2560 threads we know are stopped already. This is used during the
2561 initial remote connection in non-stop mode --- threads that are
2562 reported as already being stopped are left stopped. */
2565 set_stop_requested_callback (struct thread_info
*thread
, void *data
)
2567 /* If we have a stop reply for this thread, it must be stopped. */
2568 if (peek_stop_reply (thread
->ptid
))
2569 set_stop_requested (thread
->ptid
, 1);
2574 /* Stub for catch_exception. */
2576 struct start_remote_args
2580 /* The current target. */
2581 struct target_ops
*target
;
2583 /* Non-zero if this is an extended-remote target. */
2588 remote_start_remote (struct ui_out
*uiout
, void *opaque
)
2590 struct start_remote_args
*args
= opaque
;
2591 struct remote_state
*rs
= get_remote_state ();
2592 struct packet_config
*noack_config
;
2593 char *wait_status
= NULL
;
2595 immediate_quit
++; /* Allow user to interrupt it. */
2597 /* Ack any packet which the remote side has already sent. */
2598 serial_write (remote_desc
, "+", 1);
2600 /* The first packet we send to the target is the optional "supported
2601 packets" request. If the target can answer this, it will tell us
2602 which later probes to skip. */
2603 remote_query_supported ();
2605 /* Next, we possibly activate noack mode.
2607 If the QStartNoAckMode packet configuration is set to AUTO,
2608 enable noack mode if the stub reported a wish for it with
2611 If set to TRUE, then enable noack mode even if the stub didn't
2612 report it in qSupported. If the stub doesn't reply OK, the
2613 session ends with an error.
2615 If FALSE, then don't activate noack mode, regardless of what the
2616 stub claimed should be the default with qSupported. */
2618 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
2620 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
2621 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
2622 && noack_config
->support
== PACKET_ENABLE
))
2624 putpkt ("QStartNoAckMode");
2625 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2626 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
2630 if (args
->extended_p
)
2632 /* Tell the remote that we are using the extended protocol. */
2634 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2637 /* Next, if the target can specify a description, read it. We do
2638 this before anything involving memory or registers. */
2639 target_find_description ();
2641 /* On OSs where the list of libraries is global to all
2642 processes, we fetch them early. */
2643 if (gdbarch_has_global_solist (target_gdbarch
))
2644 solib_add (NULL
, args
->from_tty
, args
->target
, auto_solib_add
);
2648 if (!rs
->non_stop_aware
)
2649 error (_("Non-stop mode requested, but remote does not support non-stop"));
2651 putpkt ("QNonStop:1");
2652 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2654 if (strcmp (rs
->buf
, "OK") != 0)
2655 error ("Remote refused setting non-stop mode with: %s", rs
->buf
);
2657 /* Find about threads and processes the stub is already
2658 controlling. We default to adding them in the running state.
2659 The '?' query below will then tell us about which threads are
2661 remote_threads_info (args
->target
);
2663 else if (rs
->non_stop_aware
)
2665 /* Don't assume that the stub can operate in all-stop mode.
2666 Request it explicitely. */
2667 putpkt ("QNonStop:0");
2668 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2670 if (strcmp (rs
->buf
, "OK") != 0)
2671 error ("Remote refused setting all-stop mode with: %s", rs
->buf
);
2674 /* Check whether the target is running now. */
2676 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2680 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
2682 if (!args
->extended_p
)
2683 error (_("The target is not running (try extended-remote?)"));
2685 /* We're connected, but not running. Drop out before we
2686 call start_remote. */
2691 /* Save the reply for later. */
2692 wait_status
= alloca (strlen (rs
->buf
) + 1);
2693 strcpy (wait_status
, rs
->buf
);
2696 /* Let the stub know that we want it to return the thread. */
2697 set_continue_thread (minus_one_ptid
);
2699 /* Without this, some commands which require an active target
2700 (such as kill) won't work. This variable serves (at least)
2701 double duty as both the pid of the target process (if it has
2702 such), and as a flag indicating that a target is active.
2703 These functions should be split out into seperate variables,
2704 especially since GDB will someday have a notion of debugging
2705 several processes. */
2706 inferior_ptid
= magic_null_ptid
;
2708 /* Now, if we have thread information, update inferior_ptid. */
2709 inferior_ptid
= remote_current_thread (inferior_ptid
);
2711 remote_add_inferior (ptid_get_pid (inferior_ptid
), -1);
2713 /* Always add the main thread. */
2714 add_thread_silent (inferior_ptid
);
2716 get_offsets (); /* Get text, data & bss offsets. */
2718 /* If we could not find a description using qXfer, and we know
2719 how to do it some other way, try again. This is not
2720 supported for non-stop; it could be, but it is tricky if
2721 there are no stopped threads when we connect. */
2722 if (remote_read_description_p (args
->target
)
2723 && gdbarch_target_desc (target_gdbarch
) == NULL
)
2725 target_clear_description ();
2726 target_find_description ();
2729 /* Use the previously fetched status. */
2730 gdb_assert (wait_status
!= NULL
);
2731 strcpy (rs
->buf
, wait_status
);
2732 rs
->cached_wait_status
= 1;
2735 start_remote (args
->from_tty
); /* Initialize gdb process mechanisms. */
2739 /* Clear WFI global state. Do this before finding about new
2740 threads and inferiors, and setting the current inferior.
2741 Otherwise we would clear the proceed status of the current
2742 inferior when we want its stop_soon state to be preserved
2743 (see notice_new_inferior). */
2744 init_wait_for_inferior ();
2746 /* In non-stop, we will either get an "OK", meaning that there
2747 are no stopped threads at this time; or, a regular stop
2748 reply. In the latter case, there may be more than one thread
2749 stopped --- we pull them all out using the vStopped
2751 if (strcmp (rs
->buf
, "OK") != 0)
2753 struct stop_reply
*stop_reply
;
2754 struct cleanup
*old_chain
;
2756 stop_reply
= stop_reply_xmalloc ();
2757 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
2759 remote_parse_stop_reply (rs
->buf
, stop_reply
);
2760 discard_cleanups (old_chain
);
2762 /* get_pending_stop_replies acks this one, and gets the rest
2764 pending_stop_reply
= stop_reply
;
2765 remote_get_pending_stop_replies ();
2767 /* Make sure that threads that were stopped remain
2769 iterate_over_threads (set_stop_requested_callback
, NULL
);
2772 if (target_can_async_p ())
2773 target_async (inferior_event_handler
, 0);
2775 if (thread_count () == 0)
2777 if (!args
->extended_p
)
2778 error (_("The target is not running (try extended-remote?)"));
2780 /* We're connected, but not running. Drop out before we
2781 call start_remote. */
2785 /* Let the stub know that we want it to return the thread. */
2787 /* Force the stub to choose a thread. */
2788 set_general_thread (null_ptid
);
2791 inferior_ptid
= remote_current_thread (minus_one_ptid
);
2792 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
2793 error (_("remote didn't report the current thread in non-stop mode"));
2795 get_offsets (); /* Get text, data & bss offsets. */
2797 /* In non-stop mode, any cached wait status will be stored in
2798 the stop reply queue. */
2799 gdb_assert (wait_status
== NULL
);
2802 /* If we connected to a live target, do some additional setup. */
2803 if (target_has_execution
)
2805 if (exec_bfd
) /* No use without an exec file. */
2806 remote_check_symbols (symfile_objfile
);
2809 /* If breakpoints are global, insert them now. */
2810 if (gdbarch_has_global_breakpoints (target_gdbarch
)
2811 && breakpoints_always_inserted_mode ())
2812 insert_breakpoints ();
2815 /* Open a connection to a remote debugger.
2816 NAME is the filename used for communication. */
2819 remote_open (char *name
, int from_tty
)
2821 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2824 /* Open a connection to a remote debugger using the extended
2825 remote gdb protocol. NAME is the filename used for communication. */
2828 extended_remote_open (char *name
, int from_tty
)
2830 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
2833 /* Generic code for opening a connection to a remote target. */
2836 init_all_packet_configs (void)
2839 for (i
= 0; i
< PACKET_MAX
; i
++)
2840 update_packet_config (&remote_protocol_packets
[i
]);
2843 /* Symbol look-up. */
2846 remote_check_symbols (struct objfile
*objfile
)
2848 struct remote_state
*rs
= get_remote_state ();
2849 char *msg
, *reply
, *tmp
;
2850 struct minimal_symbol
*sym
;
2853 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2856 /* Make sure the remote is pointing at the right process. */
2857 set_general_process ();
2859 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2860 because we need both at the same time. */
2861 msg
= alloca (get_remote_packet_size ());
2863 /* Invite target to request symbol lookups. */
2865 putpkt ("qSymbol::");
2866 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2867 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2870 while (strncmp (reply
, "qSymbol:", 8) == 0)
2873 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2875 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2877 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2880 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
2881 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
2883 /* If this is a function address, return the start of code
2884 instead of any data function descriptor. */
2885 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
2889 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2890 phex_nz (sym_addr
, addr_size
), &reply
[8]);
2894 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2899 static struct serial
*
2900 remote_serial_open (char *name
)
2902 static int udp_warning
= 0;
2904 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2905 of in ser-tcp.c, because it is the remote protocol assuming that the
2906 serial connection is reliable and not the serial connection promising
2908 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2911 The remote protocol may be unreliable over UDP.\n\
2912 Some events may be lost, rendering further debugging impossible."));
2916 return serial_open (name
);
2919 /* This type describes each known response to the qSupported
2921 struct protocol_feature
2923 /* The name of this protocol feature. */
2926 /* The default for this protocol feature. */
2927 enum packet_support default_support
;
2929 /* The function to call when this feature is reported, or after
2930 qSupported processing if the feature is not supported.
2931 The first argument points to this structure. The second
2932 argument indicates whether the packet requested support be
2933 enabled, disabled, or probed (or the default, if this function
2934 is being called at the end of processing and this feature was
2935 not reported). The third argument may be NULL; if not NULL, it
2936 is a NUL-terminated string taken from the packet following
2937 this feature's name and an equals sign. */
2938 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2941 /* The corresponding packet for this feature. Only used if
2942 FUNC is remote_supported_packet. */
2947 remote_supported_packet (const struct protocol_feature
*feature
,
2948 enum packet_support support
,
2949 const char *argument
)
2953 warning (_("Remote qSupported response supplied an unexpected value for"
2954 " \"%s\"."), feature
->name
);
2958 if (remote_protocol_packets
[feature
->packet
].support
2959 == PACKET_SUPPORT_UNKNOWN
)
2960 remote_protocol_packets
[feature
->packet
].support
= support
;
2964 remote_packet_size (const struct protocol_feature
*feature
,
2965 enum packet_support support
, const char *value
)
2967 struct remote_state
*rs
= get_remote_state ();
2972 if (support
!= PACKET_ENABLE
)
2975 if (value
== NULL
|| *value
== '\0')
2977 warning (_("Remote target reported \"%s\" without a size."),
2983 packet_size
= strtol (value
, &value_end
, 16);
2984 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2986 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2987 feature
->name
, value
);
2991 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2993 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2994 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2995 packet_size
= MAX_REMOTE_PACKET_SIZE
;
2998 /* Record the new maximum packet size. */
2999 rs
->explicit_packet_size
= packet_size
;
3003 remote_multi_process_feature (const struct protocol_feature
*feature
,
3004 enum packet_support support
, const char *value
)
3006 struct remote_state
*rs
= get_remote_state ();
3007 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
3011 remote_non_stop_feature (const struct protocol_feature
*feature
,
3012 enum packet_support support
, const char *value
)
3014 struct remote_state
*rs
= get_remote_state ();
3015 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
3018 static struct protocol_feature remote_protocol_features
[] = {
3019 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
3020 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
3021 PACKET_qXfer_auxv
},
3022 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
3023 PACKET_qXfer_features
},
3024 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
3025 PACKET_qXfer_libraries
},
3026 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
3027 PACKET_qXfer_memory_map
},
3028 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
3029 PACKET_qXfer_spu_read
},
3030 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
3031 PACKET_qXfer_spu_write
},
3032 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
3033 PACKET_qXfer_osdata
},
3034 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
3035 PACKET_QPassSignals
},
3036 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
3037 PACKET_QStartNoAckMode
},
3038 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
3039 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
3040 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
3041 PACKET_qXfer_siginfo_read
},
3042 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
3043 PACKET_qXfer_siginfo_write
},
3047 remote_query_supported (void)
3049 struct remote_state
*rs
= get_remote_state ();
3052 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3054 /* The packet support flags are handled differently for this packet
3055 than for most others. We treat an error, a disabled packet, and
3056 an empty response identically: any features which must be reported
3057 to be used will be automatically disabled. An empty buffer
3058 accomplishes this, since that is also the representation for a list
3059 containing no features. */
3062 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3065 putpkt ("qSupported:multiprocess+");
3067 putpkt ("qSupported");
3069 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3071 /* If an error occured, warn, but do not return - just reset the
3072 buffer to empty and go on to disable features. */
3073 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3076 warning (_("Remote failure reply: %s"), rs
->buf
);
3081 memset (seen
, 0, sizeof (seen
));
3086 enum packet_support is_supported
;
3087 char *p
, *end
, *name_end
, *value
;
3089 /* First separate out this item from the rest of the packet. If
3090 there's another item after this, we overwrite the separator
3091 (terminated strings are much easier to work with). */
3093 end
= strchr (p
, ';');
3096 end
= p
+ strlen (p
);
3106 warning (_("empty item in \"qSupported\" response"));
3111 name_end
= strchr (p
, '=');
3114 /* This is a name=value entry. */
3115 is_supported
= PACKET_ENABLE
;
3116 value
= name_end
+ 1;
3125 is_supported
= PACKET_ENABLE
;
3129 is_supported
= PACKET_DISABLE
;
3133 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3137 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
3143 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3144 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3146 const struct protocol_feature
*feature
;
3149 feature
= &remote_protocol_features
[i
];
3150 feature
->func (feature
, is_supported
, value
);
3155 /* If we increased the packet size, make sure to increase the global
3156 buffer size also. We delay this until after parsing the entire
3157 qSupported packet, because this is the same buffer we were
3159 if (rs
->buf_size
< rs
->explicit_packet_size
)
3161 rs
->buf_size
= rs
->explicit_packet_size
;
3162 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3165 /* Handle the defaults for unmentioned features. */
3166 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3169 const struct protocol_feature
*feature
;
3171 feature
= &remote_protocol_features
[i
];
3172 feature
->func (feature
, feature
->default_support
, NULL
);
3178 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
, int extended_p
)
3180 struct remote_state
*rs
= get_remote_state ();
3183 error (_("To open a remote debug connection, you need to specify what\n"
3184 "serial device is attached to the remote system\n"
3185 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3187 /* See FIXME above. */
3188 if (!target_async_permitted
)
3189 wait_forever_enabled_p
= 1;
3191 /* If we're connected to a running target, target_preopen will kill it.
3192 But if we're connected to a target system with no running process,
3193 then we will still be connected when it returns. Ask this question
3194 first, before target_preopen has a chance to kill anything. */
3195 if (remote_desc
!= NULL
&& !have_inferiors ())
3198 || query (_("Already connected to a remote target. Disconnect? ")))
3201 error (_("Still connected."));
3204 target_preopen (from_tty
);
3206 unpush_target (target
);
3208 /* This time without a query. If we were connected to an
3209 extended-remote target and target_preopen killed the running
3210 process, we may still be connected. If we are starting "target
3211 remote" now, the extended-remote target will not have been
3212 removed by unpush_target. */
3213 if (remote_desc
!= NULL
&& !have_inferiors ())
3216 /* Make sure we send the passed signals list the next time we resume. */
3217 xfree (last_pass_packet
);
3218 last_pass_packet
= NULL
;
3220 remote_fileio_reset ();
3221 reopen_exec_file ();
3224 remote_desc
= remote_serial_open (name
);
3226 perror_with_name (name
);
3228 if (baud_rate
!= -1)
3230 if (serial_setbaudrate (remote_desc
, baud_rate
))
3232 /* The requested speed could not be set. Error out to
3233 top level after closing remote_desc. Take care to
3234 set remote_desc to NULL to avoid closing remote_desc
3236 serial_close (remote_desc
);
3238 perror_with_name (name
);
3242 serial_raw (remote_desc
);
3244 /* If there is something sitting in the buffer we might take it as a
3245 response to a command, which would be bad. */
3246 serial_flush_input (remote_desc
);
3250 puts_filtered ("Remote debugging using ");
3251 puts_filtered (name
);
3252 puts_filtered ("\n");
3254 push_target (target
); /* Switch to using remote target now. */
3256 /* Register extra event sources in the event loop. */
3257 remote_async_inferior_event_token
3258 = create_async_event_handler (remote_async_inferior_event_handler
,
3260 remote_async_get_pending_events_token
3261 = create_async_event_handler (remote_async_get_pending_events_handler
,
3264 /* Reset the target state; these things will be queried either by
3265 remote_query_supported or as they are needed. */
3266 init_all_packet_configs ();
3267 rs
->cached_wait_status
= 0;
3268 rs
->explicit_packet_size
= 0;
3270 rs
->multi_process_aware
= 0;
3271 rs
->extended
= extended_p
;
3272 rs
->non_stop_aware
= 0;
3273 rs
->waiting_for_stop_reply
= 0;
3275 general_thread
= not_sent_ptid
;
3276 continue_thread
= not_sent_ptid
;
3278 /* Probe for ability to use "ThreadInfo" query, as required. */
3279 use_threadinfo_query
= 1;
3280 use_threadextra_query
= 1;
3282 if (target_async_permitted
)
3284 /* With this target we start out by owning the terminal. */
3285 remote_async_terminal_ours_p
= 1;
3287 /* FIXME: cagney/1999-09-23: During the initial connection it is
3288 assumed that the target is already ready and able to respond to
3289 requests. Unfortunately remote_start_remote() eventually calls
3290 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3291 around this. Eventually a mechanism that allows
3292 wait_for_inferior() to expect/get timeouts will be
3294 wait_forever_enabled_p
= 0;
3297 /* First delete any symbols previously loaded from shared libraries. */
3298 no_shared_libraries (NULL
, 0);
3301 init_thread_list ();
3303 /* Start the remote connection. If error() or QUIT, discard this
3304 target (we'd otherwise be in an inconsistent state) and then
3305 propogate the error on up the exception chain. This ensures that
3306 the caller doesn't stumble along blindly assuming that the
3307 function succeeded. The CLI doesn't have this problem but other
3308 UI's, such as MI do.
3310 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3311 this function should return an error indication letting the
3312 caller restore the previous state. Unfortunately the command
3313 ``target remote'' is directly wired to this function making that
3314 impossible. On a positive note, the CLI side of this problem has
3315 been fixed - the function set_cmd_context() makes it possible for
3316 all the ``target ....'' commands to share a common callback
3317 function. See cli-dump.c. */
3319 struct gdb_exception ex
;
3320 struct start_remote_args args
;
3322 args
.from_tty
= from_tty
;
3323 args
.target
= target
;
3324 args
.extended_p
= extended_p
;
3326 ex
= catch_exception (uiout
, remote_start_remote
, &args
, RETURN_MASK_ALL
);
3329 /* Pop the partially set up target - unless something else did
3330 already before throwing the exception. */
3331 if (remote_desc
!= NULL
)
3333 if (target_async_permitted
)
3334 wait_forever_enabled_p
= 1;
3335 throw_exception (ex
);
3339 if (target_async_permitted
)
3340 wait_forever_enabled_p
= 1;
3343 /* This takes a program previously attached to and detaches it. After
3344 this is done, GDB can be used to debug some other program. We
3345 better not have left any breakpoints in the target program or it'll
3346 die when it hits one. */
3349 remote_detach_1 (char *args
, int from_tty
, int extended
)
3351 int pid
= ptid_get_pid (inferior_ptid
);
3352 struct remote_state
*rs
= get_remote_state ();
3355 error (_("Argument given to \"detach\" when remotely debugging."));
3357 if (!target_has_execution
)
3358 error (_("No process to detach from."));
3360 /* Tell the remote target to detach. */
3361 if (remote_multi_process_p (rs
))
3362 sprintf (rs
->buf
, "D;%x", pid
);
3364 strcpy (rs
->buf
, "D");
3367 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3369 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
3371 else if (rs
->buf
[0] == '\0')
3372 error (_("Remote doesn't know how to detach"));
3374 error (_("Can't detach process."));
3378 if (remote_multi_process_p (rs
))
3379 printf_filtered (_("Detached from remote %s.\n"),
3380 target_pid_to_str (pid_to_ptid (pid
)));
3384 puts_filtered (_("Detached from remote process.\n"));
3386 puts_filtered (_("Ending remote debugging.\n"));
3390 discard_pending_stop_replies (pid
);
3391 target_mourn_inferior ();
3395 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3397 remote_detach_1 (args
, from_tty
, 0);
3401 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3403 remote_detach_1 (args
, from_tty
, 1);
3406 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3409 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
3412 error (_("Argument given to \"disconnect\" when remotely debugging."));
3414 /* Make sure we unpush even the extended remote targets; mourn
3415 won't do it. So call remote_mourn_1 directly instead of
3416 target_mourn_inferior. */
3417 remote_mourn_1 (target
);
3420 puts_filtered ("Ending remote debugging.\n");
3423 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3424 be chatty about it. */
3427 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
3429 struct remote_state
*rs
= get_remote_state ();
3432 char *wait_status
= NULL
;
3435 error_no_arg (_("process-id to attach"));
3438 pid
= strtol (args
, &dummy
, 0);
3439 /* Some targets don't set errno on errors, grrr! */
3440 if (pid
== 0 && args
== dummy
)
3441 error (_("Illegal process-id: %s."), args
);
3443 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3444 error (_("This target does not support attaching to a process"));
3446 sprintf (rs
->buf
, "vAttach;%x", pid
);
3448 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3450 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
3453 printf_unfiltered (_("Attached to %s\n"),
3454 target_pid_to_str (pid_to_ptid (pid
)));
3458 /* Save the reply for later. */
3459 wait_status
= alloca (strlen (rs
->buf
) + 1);
3460 strcpy (wait_status
, rs
->buf
);
3462 else if (strcmp (rs
->buf
, "OK") != 0)
3463 error (_("Attaching to %s failed with: %s"),
3464 target_pid_to_str (pid_to_ptid (pid
)),
3467 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3468 error (_("This target does not support attaching to a process"));
3470 error (_("Attaching to %s failed"),
3471 target_pid_to_str (pid_to_ptid (pid
)));
3473 remote_add_inferior (pid
, 1);
3475 inferior_ptid
= pid_to_ptid (pid
);
3479 struct thread_info
*thread
;
3481 /* Get list of threads. */
3482 remote_threads_info (target
);
3484 thread
= first_thread_of_process (pid
);
3486 inferior_ptid
= thread
->ptid
;
3488 inferior_ptid
= pid_to_ptid (pid
);
3490 /* Invalidate our notion of the remote current thread. */
3491 record_currthread (minus_one_ptid
);
3495 /* Now, if we have thread information, update inferior_ptid. */
3496 inferior_ptid
= remote_current_thread (inferior_ptid
);
3498 /* Add the main thread to the thread list. */
3499 add_thread_silent (inferior_ptid
);
3502 /* Next, if the target can specify a description, read it. We do
3503 this before anything involving memory or registers. */
3504 target_find_description ();
3508 /* Use the previously fetched status. */
3509 gdb_assert (wait_status
!= NULL
);
3511 if (target_can_async_p ())
3513 struct stop_reply
*stop_reply
;
3514 struct cleanup
*old_chain
;
3516 stop_reply
= stop_reply_xmalloc ();
3517 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3518 remote_parse_stop_reply (wait_status
, stop_reply
);
3519 discard_cleanups (old_chain
);
3520 push_stop_reply (stop_reply
);
3522 target_async (inferior_event_handler
, 0);
3526 gdb_assert (wait_status
!= NULL
);
3527 strcpy (rs
->buf
, wait_status
);
3528 rs
->cached_wait_status
= 1;
3532 gdb_assert (wait_status
== NULL
);
3536 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3538 extended_remote_attach_1 (ops
, args
, from_tty
);
3541 /* Convert hex digit A to a number. */
3546 if (a
>= '0' && a
<= '9')
3548 else if (a
>= 'a' && a
<= 'f')
3549 return a
- 'a' + 10;
3550 else if (a
>= 'A' && a
<= 'F')
3551 return a
- 'A' + 10;
3553 error (_("Reply contains invalid hex digit %d"), a
);
3557 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
3561 for (i
= 0; i
< count
; i
++)
3563 if (hex
[0] == 0 || hex
[1] == 0)
3565 /* Hex string is short, or of uneven length.
3566 Return the count that has been converted so far. */
3569 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
3575 /* Convert number NIB to a hex digit. */
3583 return 'a' + nib
- 10;
3587 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
3590 /* May use a length, or a nul-terminated string as input. */
3592 count
= strlen ((char *) bin
);
3594 for (i
= 0; i
< count
; i
++)
3596 *hex
++ = tohex ((*bin
>> 4) & 0xf);
3597 *hex
++ = tohex (*bin
++ & 0xf);
3603 /* Check for the availability of vCont. This function should also check
3607 remote_vcont_probe (struct remote_state
*rs
)
3611 strcpy (rs
->buf
, "vCont?");
3613 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3616 /* Make sure that the features we assume are supported. */
3617 if (strncmp (buf
, "vCont", 5) == 0)
3620 int support_s
, support_S
, support_c
, support_C
;
3626 rs
->support_vCont_t
= 0;
3627 while (p
&& *p
== ';')
3630 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3632 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3634 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3636 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3638 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3639 rs
->support_vCont_t
= 1;
3641 p
= strchr (p
, ';');
3644 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3645 BUF will make packet_ok disable the packet. */
3646 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
3650 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
3653 /* Helper function for building "vCont" resumptions. Write a
3654 resumption to P. ENDP points to one-passed-the-end of the buffer
3655 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
3656 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
3657 resumed thread should be single-stepped and/or signalled. If PTID
3658 equals minus_one_ptid, then all threads are resumed; if PTID
3659 represents a process, then all threads of the process are resumed;
3660 the thread to be stepped and/or signalled is given in the global
3664 append_resumption (char *p
, char *endp
,
3665 ptid_t ptid
, int step
, enum target_signal siggnal
)
3667 struct remote_state
*rs
= get_remote_state ();
3669 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3670 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
3672 p
+= xsnprintf (p
, endp
- p
, ";s");
3673 else if (siggnal
!= TARGET_SIGNAL_0
)
3674 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
3676 p
+= xsnprintf (p
, endp
- p
, ";c");
3678 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
3682 /* All (-1) threads of process. */
3683 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3685 p
+= xsnprintf (p
, endp
- p
, ":");
3686 p
= write_ptid (p
, endp
, nptid
);
3688 else if (!ptid_equal (ptid
, minus_one_ptid
))
3690 p
+= xsnprintf (p
, endp
- p
, ":");
3691 p
= write_ptid (p
, endp
, ptid
);
3697 /* Resume the remote inferior by using a "vCont" packet. The thread
3698 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3699 resumed thread should be single-stepped and/or signalled. If PTID
3700 equals minus_one_ptid, then all threads are resumed; the thread to
3701 be stepped and/or signalled is given in the global INFERIOR_PTID.
3702 This function returns non-zero iff it resumes the inferior.
3704 This function issues a strict subset of all possible vCont commands at the
3708 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
3710 struct remote_state
*rs
= get_remote_state ();
3714 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3715 remote_vcont_probe (rs
);
3717 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
3721 endp
= rs
->buf
+ get_remote_packet_size ();
3723 /* If we could generate a wider range of packets, we'd have to worry
3724 about overflowing BUF. Should there be a generic
3725 "multi-part-packet" packet? */
3727 p
+= xsnprintf (p
, endp
- p
, "vCont");
3729 if (ptid_equal (ptid
, magic_null_ptid
))
3731 /* MAGIC_NULL_PTID means that we don't have any active threads,
3732 so we don't have any TID numbers the inferior will
3733 understand. Make sure to only send forms that do not specify
3735 p
= append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
3737 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
3739 /* Resume all threads (of all processes, or of a single
3740 process), with preference for INFERIOR_PTID. This assumes
3741 inferior_ptid belongs to the set of all threads we are about
3743 if (step
|| siggnal
!= TARGET_SIGNAL_0
)
3745 /* Step inferior_ptid, with or without signal. */
3746 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
3749 /* And continue others without a signal. */
3750 p
= append_resumption (p
, endp
, ptid
, /*step=*/ 0, TARGET_SIGNAL_0
);
3754 /* Scheduler locking; resume only PTID. */
3755 p
= append_resumption (p
, endp
, ptid
, step
, siggnal
);
3758 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
3763 /* In non-stop, the stub replies to vCont with "OK". The stop
3764 reply will be reported asynchronously by means of a `%Stop'
3766 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3767 if (strcmp (rs
->buf
, "OK") != 0)
3768 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
3774 /* Tell the remote machine to resume. */
3776 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
3778 static int last_sent_step
;
3781 remote_resume (struct target_ops
*ops
,
3782 ptid_t ptid
, int step
, enum target_signal siggnal
)
3784 struct remote_state
*rs
= get_remote_state ();
3787 last_sent_signal
= siggnal
;
3788 last_sent_step
= step
;
3790 /* Update the inferior on signals to silently pass, if they've changed. */
3791 remote_pass_signals ();
3793 /* The vCont packet doesn't need to specify threads via Hc. */
3794 if (remote_vcont_resume (ptid
, step
, siggnal
))
3797 /* All other supported resume packets do use Hc, so set the continue
3799 if (ptid_equal (ptid
, minus_one_ptid
))
3800 set_continue_thread (any_thread_ptid
);
3802 set_continue_thread (ptid
);
3805 if (execution_direction
== EXEC_REVERSE
)
3807 /* We don't pass signals to the target in reverse exec mode. */
3808 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
3809 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
3811 strcpy (buf
, step
? "bs" : "bc");
3813 else if (siggnal
!= TARGET_SIGNAL_0
)
3815 buf
[0] = step
? 'S' : 'C';
3816 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
3817 buf
[2] = tohex (((int) siggnal
) & 0xf);
3821 strcpy (buf
, step
? "s" : "c");
3826 /* We are about to start executing the inferior, let's register it
3827 with the event loop. NOTE: this is the one place where all the
3828 execution commands end up. We could alternatively do this in each
3829 of the execution commands in infcmd.c. */
3830 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3831 into infcmd.c in order to allow inferior function calls to work
3832 NOT asynchronously. */
3833 if (target_can_async_p ())
3834 target_async (inferior_event_handler
, 0);
3836 /* We've just told the target to resume. The remote server will
3837 wait for the inferior to stop, and then send a stop reply. In
3838 the mean time, we can't start another command/query ourselves
3839 because the stub wouldn't be ready to process it. This applies
3840 only to the base all-stop protocol, however. In non-stop (which
3841 only supports vCont), the stub replies with an "OK", and is
3842 immediate able to process further serial input. */
3844 rs
->waiting_for_stop_reply
= 1;
3848 /* Set up the signal handler for SIGINT, while the target is
3849 executing, ovewriting the 'regular' SIGINT signal handler. */
3851 initialize_sigint_signal_handler (void)
3853 signal (SIGINT
, handle_remote_sigint
);
3856 /* Signal handler for SIGINT, while the target is executing. */
3858 handle_remote_sigint (int sig
)
3860 signal (sig
, handle_remote_sigint_twice
);
3861 mark_async_signal_handler_wrapper (sigint_remote_token
);
3864 /* Signal handler for SIGINT, installed after SIGINT has already been
3865 sent once. It will take effect the second time that the user sends
3868 handle_remote_sigint_twice (int sig
)
3870 signal (sig
, handle_remote_sigint
);
3871 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
3874 /* Perform the real interruption of the target execution, in response
3877 async_remote_interrupt (gdb_client_data arg
)
3880 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
3882 target_stop (inferior_ptid
);
3885 /* Perform interrupt, if the first attempt did not succeed. Just give
3886 up on the target alltogether. */
3888 async_remote_interrupt_twice (gdb_client_data arg
)
3891 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
3896 /* Reinstall the usual SIGINT handlers, after the target has
3899 cleanup_sigint_signal_handler (void *dummy
)
3901 signal (SIGINT
, handle_sigint
);
3904 /* Send ^C to target to halt it. Target will respond, and send us a
3906 static void (*ofunc
) (int);
3908 /* The command line interface's stop routine. This function is installed
3909 as a signal handler for SIGINT. The first time a user requests a
3910 stop, we call remote_stop to send a break or ^C. If there is no
3911 response from the target (it didn't stop when the user requested it),
3912 we ask the user if he'd like to detach from the target. */
3914 remote_interrupt (int signo
)
3916 /* If this doesn't work, try more severe steps. */
3917 signal (signo
, remote_interrupt_twice
);
3919 gdb_call_async_signal_handler (sigint_remote_token
, 1);
3922 /* The user typed ^C twice. */
3925 remote_interrupt_twice (int signo
)
3927 signal (signo
, ofunc
);
3928 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
3929 signal (signo
, remote_interrupt
);
3932 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
3933 thread, all threads of a remote process, or all threads of all
3937 remote_stop_ns (ptid_t ptid
)
3939 struct remote_state
*rs
= get_remote_state ();
3941 char *endp
= rs
->buf
+ get_remote_packet_size ();
3942 struct stop_reply
*reply
, *next
;
3944 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3945 remote_vcont_probe (rs
);
3947 if (!rs
->support_vCont_t
)
3948 error (_("Remote server does not support stopping threads"));
3950 if (ptid_equal (ptid
, minus_one_ptid
)
3951 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
3952 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
3957 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
3959 if (ptid_is_pid (ptid
))
3960 /* All (-1) threads of process. */
3961 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3964 /* Small optimization: if we already have a stop reply for
3965 this thread, no use in telling the stub we want this
3967 if (peek_stop_reply (ptid
))
3973 p
= write_ptid (p
, endp
, nptid
);
3976 /* In non-stop, we get an immediate OK reply. The stop reply will
3977 come in asynchronously by notification. */
3979 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3980 if (strcmp (rs
->buf
, "OK") != 0)
3981 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
3984 /* All-stop version of target_stop. Sends a break or a ^C to stop the
3985 remote target. It is undefined which thread of which process
3986 reports the stop. */
3989 remote_stop_as (ptid_t ptid
)
3991 struct remote_state
*rs
= get_remote_state ();
3993 /* If the inferior is stopped already, but the core didn't know
3994 about it yet, just ignore the request. The cached wait status
3995 will be collected in remote_wait. */
3996 if (rs
->cached_wait_status
)
3999 /* Send a break or a ^C, depending on user preference. */
4002 serial_send_break (remote_desc
);
4004 serial_write (remote_desc
, "\003", 1);
4007 /* This is the generic stop called via the target vector. When a target
4008 interrupt is requested, either by the command line or the GUI, we
4009 will eventually end up here. */
4012 remote_stop (ptid_t ptid
)
4015 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
4018 remote_stop_ns (ptid
);
4020 remote_stop_as (ptid
);
4023 /* Ask the user what to do when an interrupt is received. */
4026 interrupt_query (void)
4028 target_terminal_ours ();
4030 if (target_can_async_p ())
4032 signal (SIGINT
, handle_sigint
);
4033 deprecated_throw_reason (RETURN_QUIT
);
4037 if (query (_("Interrupted while waiting for the program.\n\
4038 Give up (and stop debugging it)? ")))
4041 deprecated_throw_reason (RETURN_QUIT
);
4045 target_terminal_inferior ();
4048 /* Enable/disable target terminal ownership. Most targets can use
4049 terminal groups to control terminal ownership. Remote targets are
4050 different in that explicit transfer of ownership to/from GDB/target
4054 remote_terminal_inferior (void)
4056 if (!target_async_permitted
)
4057 /* Nothing to do. */
4060 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4061 idempotent. The event-loop GDB talking to an asynchronous target
4062 with a synchronous command calls this function from both
4063 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4064 transfer the terminal to the target when it shouldn't this guard
4066 if (!remote_async_terminal_ours_p
)
4068 delete_file_handler (input_fd
);
4069 remote_async_terminal_ours_p
= 0;
4070 initialize_sigint_signal_handler ();
4071 /* NOTE: At this point we could also register our selves as the
4072 recipient of all input. Any characters typed could then be
4073 passed on down to the target. */
4077 remote_terminal_ours (void)
4079 if (!target_async_permitted
)
4080 /* Nothing to do. */
4083 /* See FIXME in remote_terminal_inferior. */
4084 if (remote_async_terminal_ours_p
)
4086 cleanup_sigint_signal_handler (NULL
);
4087 add_file_handler (input_fd
, stdin_event_handler
, 0);
4088 remote_async_terminal_ours_p
= 1;
4092 remote_console_output (char *msg
)
4096 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4099 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4102 fputs_unfiltered (tb
, gdb_stdtarg
);
4104 gdb_flush (gdb_stdtarg
);
4107 typedef struct cached_reg
4110 gdb_byte data
[MAX_REGISTER_SIZE
];
4113 DEF_VEC_O(cached_reg_t
);
4117 struct stop_reply
*next
;
4121 struct target_waitstatus ws
;
4123 VEC(cached_reg_t
) *regcache
;
4125 int stopped_by_watchpoint_p
;
4126 CORE_ADDR watch_data_address
;
4132 /* The list of already fetched and acknowledged stop events. */
4133 static struct stop_reply
*stop_reply_queue
;
4135 static struct stop_reply
*
4136 stop_reply_xmalloc (void)
4138 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4144 stop_reply_xfree (struct stop_reply
*r
)
4148 VEC_free (cached_reg_t
, r
->regcache
);
4153 /* Discard all pending stop replies of inferior PID. If PID is -1,
4154 discard everything. */
4157 discard_pending_stop_replies (int pid
)
4159 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4161 /* Discard the in-flight notification. */
4162 if (pending_stop_reply
!= NULL
4164 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4166 stop_reply_xfree (pending_stop_reply
);
4167 pending_stop_reply
= NULL
;
4170 /* Discard the stop replies we have already pulled with
4172 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4176 || ptid_get_pid (reply
->ptid
) == pid
)
4178 if (reply
== stop_reply_queue
)
4179 stop_reply_queue
= reply
->next
;
4181 prev
->next
= reply
->next
;
4183 stop_reply_xfree (reply
);
4190 /* Cleanup wrapper. */
4193 do_stop_reply_xfree (void *arg
)
4195 struct stop_reply
*r
= arg
;
4196 stop_reply_xfree (r
);
4199 /* Look for a queued stop reply belonging to PTID. If one is found,
4200 remove it from the queue, and return it. Returns NULL if none is
4201 found. If there are still queued events left to process, tell the
4202 event loop to get back to target_wait soon. */
4204 static struct stop_reply
*
4205 queued_stop_reply (ptid_t ptid
)
4207 struct stop_reply
*it
, *prev
;
4208 struct stop_reply head
;
4210 head
.next
= stop_reply_queue
;
4215 if (!ptid_equal (ptid
, minus_one_ptid
))
4216 for (; it
; prev
= it
, it
= it
->next
)
4217 if (ptid_equal (ptid
, it
->ptid
))
4222 prev
->next
= it
->next
;
4226 stop_reply_queue
= head
.next
;
4228 if (stop_reply_queue
)
4229 /* There's still at least an event left. */
4230 mark_async_event_handler (remote_async_inferior_event_token
);
4235 /* Push a fully parsed stop reply in the stop reply queue. Since we
4236 know that we now have at least one queued event left to pass to the
4237 core side, tell the event loop to get back to target_wait soon. */
4240 push_stop_reply (struct stop_reply
*new_event
)
4242 struct stop_reply
*event
;
4244 if (stop_reply_queue
)
4246 for (event
= stop_reply_queue
;
4247 event
&& event
->next
;
4248 event
= event
->next
)
4251 event
->next
= new_event
;
4254 stop_reply_queue
= new_event
;
4256 mark_async_event_handler (remote_async_inferior_event_token
);
4259 /* Returns true if we have a stop reply for PTID. */
4262 peek_stop_reply (ptid_t ptid
)
4264 struct stop_reply
*it
;
4266 for (it
= stop_reply_queue
; it
; it
= it
->next
)
4267 if (ptid_equal (ptid
, it
->ptid
))
4269 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
4276 /* Parse the stop reply in BUF. Either the function succeeds, and the
4277 result is stored in EVENT, or throws an error. */
4280 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
4282 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4286 event
->ptid
= null_ptid
;
4287 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
4288 event
->ws
.value
.integer
= 0;
4289 event
->solibs_changed
= 0;
4290 event
->replay_event
= 0;
4291 event
->stopped_by_watchpoint_p
= 0;
4292 event
->regcache
= NULL
;
4296 case 'T': /* Status with PC, SP, FP, ... */
4298 gdb_byte regs
[MAX_REGISTER_SIZE
];
4300 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4301 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4303 n... = register number
4304 r... = register contents
4307 p
= &buf
[3]; /* after Txx */
4315 /* If the packet contains a register number, save it in
4316 pnum and set p1 to point to the character following it.
4317 Otherwise p1 points to p. */
4319 /* If this packet is an awatch packet, don't parse the 'a'
4320 as a register number. */
4322 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
4324 /* Read the ``P'' register number. */
4325 pnum
= strtol (p
, &p_temp
, 16);
4331 if (p1
== p
) /* No register number present here. */
4333 p1
= strchr (p
, ':');
4335 error (_("Malformed packet(a) (missing colon): %s\n\
4338 if (strncmp (p
, "thread", p1
- p
) == 0)
4339 event
->ptid
= read_ptid (++p1
, &p
);
4340 else if ((strncmp (p
, "watch", p1
- p
) == 0)
4341 || (strncmp (p
, "rwatch", p1
- p
) == 0)
4342 || (strncmp (p
, "awatch", p1
- p
) == 0))
4344 event
->stopped_by_watchpoint_p
= 1;
4345 p
= unpack_varlen_hex (++p1
, &addr
);
4346 event
->watch_data_address
= (CORE_ADDR
) addr
;
4348 else if (strncmp (p
, "library", p1
- p
) == 0)
4352 while (*p_temp
&& *p_temp
!= ';')
4355 event
->solibs_changed
= 1;
4358 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
4360 /* NO_HISTORY event.
4361 p1 will indicate "begin" or "end", but
4362 it makes no difference for now, so ignore it. */
4363 event
->replay_event
= 1;
4364 p_temp
= strchr (p1
+ 1, ';');
4370 /* Silently skip unknown optional info. */
4371 p_temp
= strchr (p1
+ 1, ';');
4378 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
4379 cached_reg_t cached_reg
;
4384 error (_("Malformed packet(b) (missing colon): %s\n\
4390 error (_("Remote sent bad register number %s: %s\n\
4392 phex_nz (pnum
, 0), p
, buf
);
4394 cached_reg
.num
= reg
->regnum
;
4396 fieldsize
= hex2bin (p
, cached_reg
.data
,
4397 register_size (target_gdbarch
,
4400 if (fieldsize
< register_size (target_gdbarch
,
4402 warning (_("Remote reply is too short: %s"), buf
);
4404 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
4408 error (_("Remote register badly formatted: %s\nhere: %s"),
4414 case 'S': /* Old style status, just signal only. */
4415 if (event
->solibs_changed
)
4416 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
4417 else if (event
->replay_event
)
4418 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
4421 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
4422 event
->ws
.value
.sig
= (enum target_signal
)
4423 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
4426 case 'W': /* Target exited. */
4433 /* GDB used to accept only 2 hex chars here. Stubs should
4434 only send more if they detect GDB supports multi-process
4436 p
= unpack_varlen_hex (&buf
[1], &value
);
4440 /* The remote process exited. */
4441 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
4442 event
->ws
.value
.integer
= value
;
4446 /* The remote process exited with a signal. */
4447 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
4448 event
->ws
.value
.sig
= (enum target_signal
) value
;
4451 /* If no process is specified, assume inferior_ptid. */
4452 pid
= ptid_get_pid (inferior_ptid
);
4461 else if (strncmp (p
,
4462 "process:", sizeof ("process:") - 1) == 0)
4465 p
+= sizeof ("process:") - 1;
4466 unpack_varlen_hex (p
, &upid
);
4470 error (_("unknown stop reply packet: %s"), buf
);
4473 error (_("unknown stop reply packet: %s"), buf
);
4474 event
->ptid
= pid_to_ptid (pid
);
4479 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
4480 error (_("No process or thread specified in stop reply: %s"), buf
);
4483 /* When the stub wants to tell GDB about a new stop reply, it sends a
4484 stop notification (%Stop). Those can come it at any time, hence,
4485 we have to make sure that any pending putpkt/getpkt sequence we're
4486 making is finished, before querying the stub for more events with
4487 vStopped. E.g., if we started a vStopped sequence immediatelly
4488 upon receiving the %Stop notification, something like this could
4496 1.6) <-- (registers reply to step #1.3)
4498 Obviously, the reply in step #1.6 would be unexpected to a vStopped
4501 To solve this, whenever we parse a %Stop notification sucessfully,
4502 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
4503 doing whatever we were doing:
4509 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
4510 2.5) <-- (registers reply to step #2.3)
4512 Eventualy after step #2.5, we return to the event loop, which
4513 notices there's an event on the
4514 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
4515 associated callback --- the function below. At this point, we're
4516 always safe to start a vStopped sequence. :
4519 2.7) <-- T05 thread:2
4525 remote_get_pending_stop_replies (void)
4527 struct remote_state
*rs
= get_remote_state ();
4530 if (pending_stop_reply
)
4533 putpkt ("vStopped");
4535 /* Now we can rely on it. */
4536 push_stop_reply (pending_stop_reply
);
4537 pending_stop_reply
= NULL
;
4541 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4542 if (strcmp (rs
->buf
, "OK") == 0)
4546 struct cleanup
*old_chain
;
4547 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
4549 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4550 remote_parse_stop_reply (rs
->buf
, stop_reply
);
4553 putpkt ("vStopped");
4555 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
4557 /* Now we can rely on it. */
4558 discard_cleanups (old_chain
);
4559 push_stop_reply (stop_reply
);
4562 /* We got an unknown stop reply. */
4563 do_cleanups (old_chain
);
4570 /* Called when it is decided that STOP_REPLY holds the info of the
4571 event that is to be returned to the core. This function always
4572 destroys STOP_REPLY. */
4575 process_stop_reply (struct stop_reply
*stop_reply
,
4576 struct target_waitstatus
*status
)
4580 *status
= stop_reply
->ws
;
4581 ptid
= stop_reply
->ptid
;
4583 /* If no thread/process was reported by the stub, assume the current
4585 if (ptid_equal (ptid
, null_ptid
))
4586 ptid
= inferior_ptid
;
4588 if (status
->kind
!= TARGET_WAITKIND_EXITED
4589 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4591 /* Expedited registers. */
4592 if (stop_reply
->regcache
)
4598 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
4600 regcache_raw_supply (get_thread_regcache (ptid
),
4601 reg
->num
, reg
->data
);
4602 VEC_free (cached_reg_t
, stop_reply
->regcache
);
4605 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
4606 remote_watch_data_address
= stop_reply
->watch_data_address
;
4608 remote_notice_new_inferior (ptid
, 0);
4611 stop_reply_xfree (stop_reply
);
4615 /* The non-stop mode version of target_wait. */
4618 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4620 struct remote_state
*rs
= get_remote_state ();
4621 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4622 ptid_t event_ptid
= null_ptid
;
4623 struct stop_reply
*stop_reply
;
4626 /* If in non-stop mode, get out of getpkt even if a
4627 notification is received. */
4629 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4636 case 'E': /* Error of some sort. */
4637 /* We're out of sync with the target now. Did it continue
4638 or not? We can't tell which thread it was in non-stop,
4639 so just ignore this. */
4640 warning (_("Remote failure reply: %s"), rs
->buf
);
4642 case 'O': /* Console output. */
4643 remote_console_output (rs
->buf
+ 1);
4646 warning (_("Invalid remote reply: %s"), rs
->buf
);
4650 /* Acknowledge a pending stop reply that may have arrived in the
4652 if (pending_stop_reply
!= NULL
)
4653 remote_get_pending_stop_replies ();
4655 /* If indeed we noticed a stop reply, we're done. */
4656 stop_reply
= queued_stop_reply (ptid
);
4657 if (stop_reply
!= NULL
)
4658 return process_stop_reply (stop_reply
, status
);
4660 /* Still no event. If we're just polling for an event, then
4661 return to the event loop. */
4662 if (options
& TARGET_WNOHANG
)
4664 status
->kind
= TARGET_WAITKIND_IGNORE
;
4665 return minus_one_ptid
;
4668 /* Otherwise do a blocking wait. */
4669 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4674 /* Wait until the remote machine stops, then return, storing status in
4675 STATUS just as `wait' would. */
4678 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4680 struct remote_state
*rs
= get_remote_state ();
4681 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4682 ptid_t event_ptid
= null_ptid
;
4684 int solibs_changed
= 0;
4686 struct stop_reply
*stop_reply
;
4690 status
->kind
= TARGET_WAITKIND_IGNORE
;
4691 status
->value
.integer
= 0;
4693 stop_reply
= queued_stop_reply (ptid
);
4694 if (stop_reply
!= NULL
)
4695 return process_stop_reply (stop_reply
, status
);
4697 if (rs
->cached_wait_status
)
4698 /* Use the cached wait status, but only once. */
4699 rs
->cached_wait_status
= 0;
4704 if (!target_is_async_p ())
4706 ofunc
= signal (SIGINT
, remote_interrupt
);
4707 /* If the user hit C-c before this packet, or between packets,
4708 pretend that it was hit right here. */
4712 remote_interrupt (SIGINT
);
4716 /* FIXME: cagney/1999-09-27: If we're in async mode we should
4717 _never_ wait for ever -> test on target_is_async_p().
4718 However, before we do that we need to ensure that the caller
4719 knows how to take the target into/out of async mode. */
4720 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
4721 if (!target_is_async_p ())
4722 signal (SIGINT
, ofunc
);
4727 remote_stopped_by_watchpoint_p
= 0;
4729 /* We got something. */
4730 rs
->waiting_for_stop_reply
= 0;
4734 case 'E': /* Error of some sort. */
4735 /* We're out of sync with the target now. Did it continue or
4736 not? Not is more likely, so report a stop. */
4737 warning (_("Remote failure reply: %s"), buf
);
4738 status
->kind
= TARGET_WAITKIND_STOPPED
;
4739 status
->value
.sig
= TARGET_SIGNAL_0
;
4741 case 'F': /* File-I/O request. */
4742 remote_fileio_request (buf
);
4744 case 'T': case 'S': case 'X': case 'W':
4746 struct stop_reply
*stop_reply
;
4747 struct cleanup
*old_chain
;
4749 stop_reply
= stop_reply_xmalloc ();
4750 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4751 remote_parse_stop_reply (buf
, stop_reply
);
4752 discard_cleanups (old_chain
);
4753 event_ptid
= process_stop_reply (stop_reply
, status
);
4756 case 'O': /* Console output. */
4757 remote_console_output (buf
+ 1);
4759 /* The target didn't really stop; keep waiting. */
4760 rs
->waiting_for_stop_reply
= 1;
4764 if (last_sent_signal
!= TARGET_SIGNAL_0
)
4766 /* Zero length reply means that we tried 'S' or 'C' and the
4767 remote system doesn't support it. */
4768 target_terminal_ours_for_output ();
4770 ("Can't send signals to this remote system. %s not sent.\n",
4771 target_signal_to_name (last_sent_signal
));
4772 last_sent_signal
= TARGET_SIGNAL_0
;
4773 target_terminal_inferior ();
4775 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
4776 putpkt ((char *) buf
);
4778 /* We just told the target to resume, so a stop reply is in
4780 rs
->waiting_for_stop_reply
= 1;
4783 /* else fallthrough */
4785 warning (_("Invalid remote reply: %s"), buf
);
4787 rs
->waiting_for_stop_reply
= 1;
4791 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
4793 /* Nothing interesting happened. If we're doing a non-blocking
4794 poll, we're done. Otherwise, go back to waiting. */
4795 if (options
& TARGET_WNOHANG
)
4796 return minus_one_ptid
;
4800 else if (status
->kind
!= TARGET_WAITKIND_EXITED
4801 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4803 if (!ptid_equal (event_ptid
, null_ptid
))
4804 record_currthread (event_ptid
);
4806 event_ptid
= inferior_ptid
;
4809 /* A process exit. Invalidate our notion of current thread. */
4810 record_currthread (minus_one_ptid
);
4815 /* Wait until the remote machine stops, then return, storing status in
4816 STATUS just as `wait' would. */
4819 remote_wait (struct target_ops
*ops
,
4820 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4825 event_ptid
= remote_wait_ns (ptid
, status
, options
);
4827 event_ptid
= remote_wait_as (ptid
, status
, options
);
4829 if (target_can_async_p ())
4831 /* If there are are events left in the queue tell the event loop
4833 if (stop_reply_queue
)
4834 mark_async_event_handler (remote_async_inferior_event_token
);
4840 /* Fetch a single register using a 'p' packet. */
4843 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
4845 struct remote_state
*rs
= get_remote_state ();
4847 char regp
[MAX_REGISTER_SIZE
];
4850 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
4853 if (reg
->pnum
== -1)
4858 p
+= hexnumstr (p
, reg
->pnum
);
4860 remote_send (&rs
->buf
, &rs
->buf_size
);
4864 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
4868 case PACKET_UNKNOWN
:
4871 error (_("Could not fetch register \"%s\""),
4872 gdbarch_register_name (get_regcache_arch (regcache
), reg
->regnum
));
4875 /* If this register is unfetchable, tell the regcache. */
4878 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
4882 /* Otherwise, parse and supply the value. */
4888 error (_("fetch_register_using_p: early buf termination"));
4890 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4893 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
4897 /* Fetch the registers included in the target's 'g' packet. */
4900 send_g_packet (void)
4902 struct remote_state
*rs
= get_remote_state ();
4907 sprintf (rs
->buf
, "g");
4908 remote_send (&rs
->buf
, &rs
->buf_size
);
4910 /* We can get out of synch in various cases. If the first character
4911 in the buffer is not a hex character, assume that has happened
4912 and try to fetch another packet to read. */
4913 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
4914 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
4915 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
4916 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
4919 fprintf_unfiltered (gdb_stdlog
,
4920 "Bad register packet; fetching a new packet\n");
4921 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4924 buf_len
= strlen (rs
->buf
);
4926 /* Sanity check the received packet. */
4927 if (buf_len
% 2 != 0)
4928 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
4934 process_g_packet (struct regcache
*regcache
)
4936 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
4937 struct remote_state
*rs
= get_remote_state ();
4938 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4943 buf_len
= strlen (rs
->buf
);
4945 /* Further sanity checks, with knowledge of the architecture. */
4946 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
4947 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
4949 /* Save the size of the packet sent to us by the target. It is used
4950 as a heuristic when determining the max size of packets that the
4951 target can safely receive. */
4952 if (rsa
->actual_register_packet_size
== 0)
4953 rsa
->actual_register_packet_size
= buf_len
;
4955 /* If this is smaller than we guessed the 'g' packet would be,
4956 update our records. A 'g' reply that doesn't include a register's
4957 value implies either that the register is not available, or that
4958 the 'p' packet must be used. */
4959 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
4961 rsa
->sizeof_g_packet
= buf_len
/ 2;
4963 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4965 if (rsa
->regs
[i
].pnum
== -1)
4968 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
4969 rsa
->regs
[i
].in_g_packet
= 0;
4971 rsa
->regs
[i
].in_g_packet
= 1;
4975 regs
= alloca (rsa
->sizeof_g_packet
);
4977 /* Unimplemented registers read as all bits zero. */
4978 memset (regs
, 0, rsa
->sizeof_g_packet
);
4980 /* Reply describes registers byte by byte, each byte encoded as two
4981 hex characters. Suck them all up, then supply them to the
4982 register cacheing/storage mechanism. */
4985 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
4987 if (p
[0] == 0 || p
[1] == 0)
4988 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4989 internal_error (__FILE__
, __LINE__
,
4990 "unexpected end of 'g' packet reply");
4992 if (p
[0] == 'x' && p
[1] == 'x')
4993 regs
[i
] = 0; /* 'x' */
4995 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5001 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5003 struct packet_reg
*r
= &rsa
->regs
[i
];
5006 if (r
->offset
* 2 >= strlen (rs
->buf
))
5007 /* This shouldn't happen - we adjusted in_g_packet above. */
5008 internal_error (__FILE__
, __LINE__
,
5009 "unexpected end of 'g' packet reply");
5010 else if (rs
->buf
[r
->offset
* 2] == 'x')
5012 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5013 /* The register isn't available, mark it as such (at
5014 the same time setting the value to zero). */
5015 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5018 regcache_raw_supply (regcache
, r
->regnum
,
5026 fetch_registers_using_g (struct regcache
*regcache
)
5029 process_g_packet (regcache
);
5033 remote_fetch_registers (struct target_ops
*ops
,
5034 struct regcache
*regcache
, int regnum
)
5036 struct remote_state
*rs
= get_remote_state ();
5037 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5040 set_general_thread (inferior_ptid
);
5044 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5045 gdb_assert (reg
!= NULL
);
5047 /* If this register might be in the 'g' packet, try that first -
5048 we are likely to read more than one register. If this is the
5049 first 'g' packet, we might be overly optimistic about its
5050 contents, so fall back to 'p'. */
5051 if (reg
->in_g_packet
)
5053 fetch_registers_using_g (regcache
);
5054 if (reg
->in_g_packet
)
5058 if (fetch_register_using_p (regcache
, reg
))
5061 /* This register is not available. */
5062 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5067 fetch_registers_using_g (regcache
);
5069 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5070 if (!rsa
->regs
[i
].in_g_packet
)
5071 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5073 /* This register is not available. */
5074 regcache_raw_supply (regcache
, i
, NULL
);
5078 /* Prepare to store registers. Since we may send them all (using a
5079 'G' request), we have to read out the ones we don't want to change
5083 remote_prepare_to_store (struct regcache
*regcache
)
5085 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5087 gdb_byte buf
[MAX_REGISTER_SIZE
];
5089 /* Make sure the entire registers array is valid. */
5090 switch (remote_protocol_packets
[PACKET_P
].support
)
5092 case PACKET_DISABLE
:
5093 case PACKET_SUPPORT_UNKNOWN
:
5094 /* Make sure all the necessary registers are cached. */
5095 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5096 if (rsa
->regs
[i
].in_g_packet
)
5097 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5104 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5105 packet was not recognized. */
5108 store_register_using_P (const struct regcache
*regcache
, struct packet_reg
*reg
)
5110 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5111 struct remote_state
*rs
= get_remote_state ();
5112 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5113 /* Try storing a single register. */
5114 char *buf
= rs
->buf
;
5115 gdb_byte regp
[MAX_REGISTER_SIZE
];
5118 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5121 if (reg
->pnum
== -1)
5124 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5125 p
= buf
+ strlen (buf
);
5126 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5127 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5128 remote_send (&rs
->buf
, &rs
->buf_size
);
5130 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5135 error (_("Could not write register \"%s\""),
5136 gdbarch_register_name (gdbarch
, reg
->regnum
));
5137 case PACKET_UNKNOWN
:
5140 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5144 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5145 contents of the register cache buffer. FIXME: ignores errors. */
5148 store_registers_using_G (const struct regcache
*regcache
)
5150 struct remote_state
*rs
= get_remote_state ();
5151 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5155 /* Extract all the registers in the regcache copying them into a
5159 regs
= alloca (rsa
->sizeof_g_packet
);
5160 memset (regs
, 0, rsa
->sizeof_g_packet
);
5161 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5163 struct packet_reg
*r
= &rsa
->regs
[i
];
5165 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5169 /* Command describes registers byte by byte,
5170 each byte encoded as two hex characters. */
5173 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5175 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5176 remote_send (&rs
->buf
, &rs
->buf_size
);
5179 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5180 of the register cache buffer. FIXME: ignores errors. */
5183 remote_store_registers (struct target_ops
*ops
,
5184 struct regcache
*regcache
, int regnum
)
5186 struct remote_state
*rs
= get_remote_state ();
5187 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5190 set_general_thread (inferior_ptid
);
5194 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5195 gdb_assert (reg
!= NULL
);
5197 /* Always prefer to store registers using the 'P' packet if
5198 possible; we often change only a small number of registers.
5199 Sometimes we change a larger number; we'd need help from a
5200 higher layer to know to use 'G'. */
5201 if (store_register_using_P (regcache
, reg
))
5204 /* For now, don't complain if we have no way to write the
5205 register. GDB loses track of unavailable registers too
5206 easily. Some day, this may be an error. We don't have
5207 any way to read the register, either... */
5208 if (!reg
->in_g_packet
)
5211 store_registers_using_G (regcache
);
5215 store_registers_using_G (regcache
);
5217 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5218 if (!rsa
->regs
[i
].in_g_packet
)
5219 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
5220 /* See above for why we do not issue an error here. */
5225 /* Return the number of hex digits in num. */
5228 hexnumlen (ULONGEST num
)
5232 for (i
= 0; num
!= 0; i
++)
5238 /* Set BUF to the minimum number of hex digits representing NUM. */
5241 hexnumstr (char *buf
, ULONGEST num
)
5243 int len
= hexnumlen (num
);
5244 return hexnumnstr (buf
, num
, len
);
5248 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5251 hexnumnstr (char *buf
, ULONGEST num
, int width
)
5257 for (i
= width
- 1; i
>= 0; i
--)
5259 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
5266 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5269 remote_address_masked (CORE_ADDR addr
)
5271 int address_size
= remote_address_size
;
5272 /* If "remoteaddresssize" was not set, default to target address size. */
5274 address_size
= gdbarch_addr_bit (target_gdbarch
);
5276 if (address_size
> 0
5277 && address_size
< (sizeof (ULONGEST
) * 8))
5279 /* Only create a mask when that mask can safely be constructed
5280 in a ULONGEST variable. */
5282 mask
= (mask
<< address_size
) - 1;
5288 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5289 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5290 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5291 (which may be more than *OUT_LEN due to escape characters). The
5292 total number of bytes in the output buffer will be at most
5296 remote_escape_output (const gdb_byte
*buffer
, int len
,
5297 gdb_byte
*out_buf
, int *out_len
,
5300 int input_index
, output_index
;
5303 for (input_index
= 0; input_index
< len
; input_index
++)
5305 gdb_byte b
= buffer
[input_index
];
5307 if (b
== '$' || b
== '#' || b
== '}')
5309 /* These must be escaped. */
5310 if (output_index
+ 2 > out_maxlen
)
5312 out_buf
[output_index
++] = '}';
5313 out_buf
[output_index
++] = b
^ 0x20;
5317 if (output_index
+ 1 > out_maxlen
)
5319 out_buf
[output_index
++] = b
;
5323 *out_len
= input_index
;
5324 return output_index
;
5327 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5328 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5329 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5331 This function reverses remote_escape_output. It allows more
5332 escaped characters than that function does, in particular because
5333 '*' must be escaped to avoid the run-length encoding processing
5334 in reading packets. */
5337 remote_unescape_input (const gdb_byte
*buffer
, int len
,
5338 gdb_byte
*out_buf
, int out_maxlen
)
5340 int input_index
, output_index
;
5345 for (input_index
= 0; input_index
< len
; input_index
++)
5347 gdb_byte b
= buffer
[input_index
];
5349 if (output_index
+ 1 > out_maxlen
)
5351 warning (_("Received too much data from remote target;"
5352 " ignoring overflow."));
5353 return output_index
;
5358 out_buf
[output_index
++] = b
^ 0x20;
5364 out_buf
[output_index
++] = b
;
5368 error (_("Unmatched escape character in target response."));
5370 return output_index
;
5373 /* Determine whether the remote target supports binary downloading.
5374 This is accomplished by sending a no-op memory write of zero length
5375 to the target at the specified address. It does not suffice to send
5376 the whole packet, since many stubs strip the eighth bit and
5377 subsequently compute a wrong checksum, which causes real havoc with
5380 NOTE: This can still lose if the serial line is not eight-bit
5381 clean. In cases like this, the user should clear "remote
5385 check_binary_download (CORE_ADDR addr
)
5387 struct remote_state
*rs
= get_remote_state ();
5389 switch (remote_protocol_packets
[PACKET_X
].support
)
5391 case PACKET_DISABLE
:
5395 case PACKET_SUPPORT_UNKNOWN
:
5401 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5403 p
+= hexnumstr (p
, (ULONGEST
) 0);
5407 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5408 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5410 if (rs
->buf
[0] == '\0')
5413 fprintf_unfiltered (gdb_stdlog
,
5414 "binary downloading NOT suppported by target\n");
5415 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
5420 fprintf_unfiltered (gdb_stdlog
,
5421 "binary downloading suppported by target\n");
5422 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
5429 /* Write memory data directly to the remote machine.
5430 This does not inform the data cache; the data cache uses this.
5431 HEADER is the starting part of the packet.
5432 MEMADDR is the address in the remote memory space.
5433 MYADDR is the address of the buffer in our space.
5434 LEN is the number of bytes.
5435 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
5436 should send data as binary ('X'), or hex-encoded ('M').
5438 The function creates packet of the form
5439 <HEADER><ADDRESS>,<LENGTH>:<DATA>
5441 where encoding of <DATA> is termined by PACKET_FORMAT.
5443 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
5446 Returns the number of bytes transferred, or 0 (setting errno) for
5447 error. Only transfer a single packet. */
5450 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
5451 const gdb_byte
*myaddr
, int len
,
5452 char packet_format
, int use_length
)
5454 struct remote_state
*rs
= get_remote_state ();
5464 if (packet_format
!= 'X' && packet_format
!= 'M')
5465 internal_error (__FILE__
, __LINE__
,
5466 "remote_write_bytes_aux: bad packet format");
5471 payload_size
= get_memory_write_packet_size ();
5473 /* The packet buffer will be large enough for the payload;
5474 get_memory_packet_size ensures this. */
5477 /* Compute the size of the actual payload by subtracting out the
5478 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
5480 payload_size
-= strlen ("$,:#NN");
5482 /* The comma won't be used. */
5484 header_length
= strlen (header
);
5485 payload_size
-= header_length
;
5486 payload_size
-= hexnumlen (memaddr
);
5488 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
5490 strcat (rs
->buf
, header
);
5491 p
= rs
->buf
+ strlen (header
);
5493 /* Compute a best guess of the number of bytes actually transfered. */
5494 if (packet_format
== 'X')
5496 /* Best guess at number of bytes that will fit. */
5497 todo
= min (len
, payload_size
);
5499 payload_size
-= hexnumlen (todo
);
5500 todo
= min (todo
, payload_size
);
5504 /* Num bytes that will fit. */
5505 todo
= min (len
, payload_size
/ 2);
5507 payload_size
-= hexnumlen (todo
);
5508 todo
= min (todo
, payload_size
/ 2);
5512 internal_error (__FILE__
, __LINE__
,
5513 _("minumum packet size too small to write data"));
5515 /* If we already need another packet, then try to align the end
5516 of this packet to a useful boundary. */
5517 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
5518 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
5520 /* Append "<memaddr>". */
5521 memaddr
= remote_address_masked (memaddr
);
5522 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5529 /* Append <len>. Retain the location/size of <len>. It may need to
5530 be adjusted once the packet body has been created. */
5532 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
5540 /* Append the packet body. */
5541 if (packet_format
== 'X')
5543 /* Binary mode. Send target system values byte by byte, in
5544 increasing byte addresses. Only escape certain critical
5546 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
5549 /* If not all TODO bytes fit, then we'll need another packet. Make
5550 a second try to keep the end of the packet aligned. Don't do
5551 this if the packet is tiny. */
5552 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
5556 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
5558 if (new_nr_bytes
!= nr_bytes
)
5559 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
5564 p
+= payload_length
;
5565 if (use_length
&& nr_bytes
< todo
)
5567 /* Escape chars have filled up the buffer prematurely,
5568 and we have actually sent fewer bytes than planned.
5569 Fix-up the length field of the packet. Use the same
5570 number of characters as before. */
5571 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
5572 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
5577 /* Normal mode: Send target system values byte by byte, in
5578 increasing byte addresses. Each byte is encoded as a two hex
5580 nr_bytes
= bin2hex (myaddr
, p
, todo
);
5584 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5585 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5587 if (rs
->buf
[0] == 'E')
5589 /* There is no correspondance between what the remote protocol
5590 uses for errors and errno codes. We would like a cleaner way
5591 of representing errors (big enough to include errno codes,
5592 bfd_error codes, and others). But for now just return EIO. */
5597 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
5598 fewer bytes than we'd planned. */
5602 /* Write memory data directly to the remote machine.
5603 This does not inform the data cache; the data cache uses this.
5604 MEMADDR is the address in the remote memory space.
5605 MYADDR is the address of the buffer in our space.
5606 LEN is the number of bytes.
5608 Returns number of bytes transferred, or 0 (setting errno) for
5609 error. Only transfer a single packet. */
5612 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
5614 char *packet_format
= 0;
5616 /* Check whether the target supports binary download. */
5617 check_binary_download (memaddr
);
5619 switch (remote_protocol_packets
[PACKET_X
].support
)
5622 packet_format
= "X";
5624 case PACKET_DISABLE
:
5625 packet_format
= "M";
5627 case PACKET_SUPPORT_UNKNOWN
:
5628 internal_error (__FILE__
, __LINE__
,
5629 _("remote_write_bytes: bad internal state"));
5631 internal_error (__FILE__
, __LINE__
, _("bad switch"));
5634 return remote_write_bytes_aux (packet_format
,
5635 memaddr
, myaddr
, len
, packet_format
[0], 1);
5638 /* Read memory data directly from the remote machine.
5639 This does not use the data cache; the data cache uses this.
5640 MEMADDR is the address in the remote memory space.
5641 MYADDR is the address of the buffer in our space.
5642 LEN is the number of bytes.
5644 Returns number of bytes transferred, or 0 for error. */
5646 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
5647 remote targets) shouldn't attempt to read the entire buffer.
5648 Instead it should read a single packet worth of data and then
5649 return the byte size of that packet to the caller. The caller (its
5650 caller and its callers caller ;-) already contains code for
5651 handling partial reads. */
5654 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
5656 struct remote_state
*rs
= get_remote_state ();
5657 int max_buf_size
; /* Max size of packet output buffer. */
5663 max_buf_size
= get_memory_read_packet_size ();
5664 /* The packet buffer will be large enough for the payload;
5665 get_memory_packet_size ensures this. */
5674 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
5676 /* construct "m"<memaddr>","<len>" */
5677 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
5678 memaddr
= remote_address_masked (memaddr
);
5681 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5683 p
+= hexnumstr (p
, (ULONGEST
) todo
);
5687 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5689 if (rs
->buf
[0] == 'E'
5690 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
5691 && rs
->buf
[3] == '\0')
5693 /* There is no correspondance between what the remote
5694 protocol uses for errors and errno codes. We would like
5695 a cleaner way of representing errors (big enough to
5696 include errno codes, bfd_error codes, and others). But
5697 for now just return EIO. */
5702 /* Reply describes memory byte by byte,
5703 each byte encoded as two hex characters. */
5706 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
5708 /* Reply is short. This means that we were able to read
5709 only part of what we wanted to. */
5710 return i
+ (origlen
- len
);
5720 /* Remote notification handler. */
5723 handle_notification (char *buf
, size_t length
)
5725 if (strncmp (buf
, "Stop:", 5) == 0)
5727 if (pending_stop_reply
)
5728 /* We've already parsed the in-flight stop-reply, but the stub
5729 for some reason thought we didn't, possibly due to timeout
5730 on its side. Just ignore it. */
5734 struct cleanup
*old_chain
;
5735 struct stop_reply
*reply
= stop_reply_xmalloc ();
5736 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
5738 remote_parse_stop_reply (buf
+ 5, reply
);
5740 discard_cleanups (old_chain
);
5742 /* Be careful to only set it after parsing, since an error
5743 may be thrown then. */
5744 pending_stop_reply
= reply
;
5746 /* Notify the event loop there's a stop reply to acknowledge
5747 and that there may be more events to fetch. */
5748 mark_async_event_handler (remote_async_get_pending_events_token
);
5752 /* We ignore notifications we don't recognize, for compatibility
5753 with newer stubs. */
5758 /* Read or write LEN bytes from inferior memory at MEMADDR,
5759 transferring to or from debugger address BUFFER. Write to inferior
5760 if SHOULD_WRITE is nonzero. Returns length of data written or
5761 read; 0 for error. TARGET is unused. */
5764 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
5765 int should_write
, struct mem_attrib
*attrib
,
5766 struct target_ops
*target
)
5770 set_general_thread (inferior_ptid
);
5773 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
5775 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
5780 /* Sends a packet with content determined by the printf format string
5781 FORMAT and the remaining arguments, then gets the reply. Returns
5782 whether the packet was a success, a failure, or unknown. */
5784 static enum packet_result
5785 remote_send_printf (const char *format
, ...)
5787 struct remote_state
*rs
= get_remote_state ();
5788 int max_size
= get_remote_packet_size ();
5791 va_start (ap
, format
);
5794 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
5795 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
5797 if (putpkt (rs
->buf
) < 0)
5798 error (_("Communication problem with target."));
5801 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5803 return packet_check_result (rs
->buf
);
5807 restore_remote_timeout (void *p
)
5809 int value
= *(int *)p
;
5810 remote_timeout
= value
;
5813 /* Flash writing can take quite some time. We'll set
5814 effectively infinite timeout for flash operations.
5815 In future, we'll need to decide on a better approach. */
5816 static const int remote_flash_timeout
= 1000;
5819 remote_flash_erase (struct target_ops
*ops
,
5820 ULONGEST address
, LONGEST length
)
5822 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
5823 int saved_remote_timeout
= remote_timeout
;
5824 enum packet_result ret
;
5826 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5827 &saved_remote_timeout
);
5828 remote_timeout
= remote_flash_timeout
;
5830 ret
= remote_send_printf ("vFlashErase:%s,%s",
5831 phex (address
, addr_size
),
5835 case PACKET_UNKNOWN
:
5836 error (_("Remote target does not support flash erase"));
5838 error (_("Error erasing flash with vFlashErase packet"));
5843 do_cleanups (back_to
);
5847 remote_flash_write (struct target_ops
*ops
,
5848 ULONGEST address
, LONGEST length
,
5849 const gdb_byte
*data
)
5851 int saved_remote_timeout
= remote_timeout
;
5853 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5854 &saved_remote_timeout
);
5856 remote_timeout
= remote_flash_timeout
;
5857 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
5858 do_cleanups (back_to
);
5864 remote_flash_done (struct target_ops
*ops
)
5866 int saved_remote_timeout
= remote_timeout
;
5868 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5869 &saved_remote_timeout
);
5871 remote_timeout
= remote_flash_timeout
;
5872 ret
= remote_send_printf ("vFlashDone");
5873 do_cleanups (back_to
);
5877 case PACKET_UNKNOWN
:
5878 error (_("Remote target does not support vFlashDone"));
5880 error (_("Error finishing flash operation"));
5887 remote_files_info (struct target_ops
*ignore
)
5889 puts_filtered ("Debugging a target over a serial line.\n");
5892 /* Stuff for dealing with the packets which are part of this protocol.
5893 See comment at top of file for details. */
5895 /* Read a single character from the remote end. */
5898 readchar (int timeout
)
5902 ch
= serial_readchar (remote_desc
, timeout
);
5907 switch ((enum serial_rc
) ch
)
5911 error (_("Remote connection closed"));
5914 perror_with_name (_("Remote communication error"));
5916 case SERIAL_TIMEOUT
:
5922 /* Send the command in *BUF to the remote machine, and read the reply
5923 into *BUF. Report an error if we get an error reply. Resize
5924 *BUF using xrealloc if necessary to hold the result, and update
5928 remote_send (char **buf
,
5932 getpkt (buf
, sizeof_buf
, 0);
5934 if ((*buf
)[0] == 'E')
5935 error (_("Remote failure reply: %s"), *buf
);
5938 /* Return a pointer to an xmalloc'ed string representing an escaped
5939 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
5940 etc. The caller is responsible for releasing the returned
5944 escape_buffer (const char *buf
, int n
)
5946 struct cleanup
*old_chain
;
5947 struct ui_file
*stb
;
5951 stb
= mem_fileopen ();
5952 old_chain
= make_cleanup_ui_file_delete (stb
);
5954 fputstrn_unfiltered (buf
, n
, 0, stb
);
5955 str
= ui_file_xstrdup (stb
, &length
);
5956 do_cleanups (old_chain
);
5960 /* Display a null-terminated packet on stdout, for debugging, using C
5964 print_packet (char *buf
)
5966 puts_filtered ("\"");
5967 fputstr_filtered (buf
, '"', gdb_stdout
);
5968 puts_filtered ("\"");
5974 return putpkt_binary (buf
, strlen (buf
));
5977 /* Send a packet to the remote machine, with error checking. The data
5978 of the packet is in BUF. The string in BUF can be at most
5979 get_remote_packet_size () - 5 to account for the $, # and checksum,
5980 and for a possible /0 if we are debugging (remote_debug) and want
5981 to print the sent packet as a string. */
5984 putpkt_binary (char *buf
, int cnt
)
5986 struct remote_state
*rs
= get_remote_state ();
5988 unsigned char csum
= 0;
5989 char *buf2
= alloca (cnt
+ 6);
5995 /* Catch cases like trying to read memory or listing threads while
5996 we're waiting for a stop reply. The remote server wouldn't be
5997 ready to handle this request, so we'd hang and timeout. We don't
5998 have to worry about this in synchronous mode, because in that
5999 case it's not possible to issue a command while the target is
6000 running. This is not a problem in non-stop mode, because in that
6001 case, the stub is always ready to process serial input. */
6002 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
6003 error (_("Cannot execute this command while the target is running."));
6005 /* We're sending out a new packet. Make sure we don't look at a
6006 stale cached response. */
6007 rs
->cached_wait_status
= 0;
6009 /* Copy the packet into buffer BUF2, encapsulating it
6010 and giving it a checksum. */
6015 for (i
= 0; i
< cnt
; i
++)
6021 *p
++ = tohex ((csum
>> 4) & 0xf);
6022 *p
++ = tohex (csum
& 0xf);
6024 /* Send it over and over until we get a positive ack. */
6028 int started_error_output
= 0;
6032 struct cleanup
*old_chain
;
6036 str
= escape_buffer (buf2
, p
- buf2
);
6037 old_chain
= make_cleanup (xfree
, str
);
6038 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
6039 gdb_flush (gdb_stdlog
);
6040 do_cleanups (old_chain
);
6042 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6043 perror_with_name (_("putpkt: write failed"));
6045 /* If this is a no acks version of the remote protocol, send the
6046 packet and move on. */
6050 /* Read until either a timeout occurs (-2) or '+' is read.
6051 Handle any notification that arrives in the mean time. */
6054 ch
= readchar (remote_timeout
);
6062 case SERIAL_TIMEOUT
:
6065 if (started_error_output
)
6067 putchar_unfiltered ('\n');
6068 started_error_output
= 0;
6077 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6081 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6082 case SERIAL_TIMEOUT
:
6086 break; /* Retransmit buffer. */
6090 fprintf_unfiltered (gdb_stdlog
,
6091 "Packet instead of Ack, ignoring it\n");
6092 /* It's probably an old response sent because an ACK
6093 was lost. Gobble up the packet and ack it so it
6094 doesn't get retransmitted when we resend this
6097 serial_write (remote_desc
, "+", 1);
6098 continue; /* Now, go look for +. */
6105 /* If we got a notification, handle it, and go back to looking
6107 /* We've found the start of a notification. Now
6108 collect the data. */
6109 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6114 struct cleanup
*old_chain
;
6117 str
= escape_buffer (rs
->buf
, val
);
6118 old_chain
= make_cleanup (xfree
, str
);
6119 fprintf_unfiltered (gdb_stdlog
,
6120 " Notification received: %s\n",
6122 do_cleanups (old_chain
);
6124 handle_notification (rs
->buf
, val
);
6125 /* We're in sync now, rewait for the ack. */
6132 if (!started_error_output
)
6134 started_error_output
= 1;
6135 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6137 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6138 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6147 if (!started_error_output
)
6149 started_error_output
= 1;
6150 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6152 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6156 break; /* Here to retransmit. */
6160 /* This is wrong. If doing a long backtrace, the user should be
6161 able to get out next time we call QUIT, without anything as
6162 violent as interrupt_query. If we want to provide a way out of
6163 here without getting to the next QUIT, it should be based on
6164 hitting ^C twice as in remote_wait. */
6175 /* Come here after finding the start of a frame when we expected an
6176 ack. Do our best to discard the rest of this packet. */
6185 c
= readchar (remote_timeout
);
6188 case SERIAL_TIMEOUT
:
6189 /* Nothing we can do. */
6192 /* Discard the two bytes of checksum and stop. */
6193 c
= readchar (remote_timeout
);
6195 c
= readchar (remote_timeout
);
6198 case '*': /* Run length encoding. */
6199 /* Discard the repeat count. */
6200 c
= readchar (remote_timeout
);
6205 /* A regular character. */
6211 /* Come here after finding the start of the frame. Collect the rest
6212 into *BUF, verifying the checksum, length, and handling run-length
6213 compression. NUL terminate the buffer. If there is not enough room,
6214 expand *BUF using xrealloc.
6216 Returns -1 on error, number of characters in buffer (ignoring the
6217 trailing NULL) on success. (could be extended to return one of the
6218 SERIAL status indications). */
6221 read_frame (char **buf_p
,
6228 struct remote_state
*rs
= get_remote_state ();
6235 c
= readchar (remote_timeout
);
6238 case SERIAL_TIMEOUT
:
6240 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
6244 fputs_filtered ("Saw new packet start in middle of old one\n",
6246 return -1; /* Start a new packet, count retries. */
6249 unsigned char pktcsum
;
6255 check_0
= readchar (remote_timeout
);
6257 check_1
= readchar (remote_timeout
);
6259 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
6262 fputs_filtered ("Timeout in checksum, retrying\n",
6266 else if (check_0
< 0 || check_1
< 0)
6269 fputs_filtered ("Communication error in checksum\n",
6274 /* Don't recompute the checksum; with no ack packets we
6275 don't have any way to indicate a packet retransmission
6280 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
6281 if (csum
== pktcsum
)
6286 struct cleanup
*old_chain
;
6289 str
= escape_buffer (buf
, bc
);
6290 old_chain
= make_cleanup (xfree
, str
);
6291 fprintf_unfiltered (gdb_stdlog
,
6293 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6294 pktcsum
, csum
, str
);
6295 do_cleanups (old_chain
);
6297 /* Number of characters in buffer ignoring trailing
6301 case '*': /* Run length encoding. */
6306 c
= readchar (remote_timeout
);
6308 repeat
= c
- ' ' + 3; /* Compute repeat count. */
6310 /* The character before ``*'' is repeated. */
6312 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
6314 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
6316 /* Make some more room in the buffer. */
6317 *sizeof_buf
+= repeat
;
6318 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6322 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
6328 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
6332 if (bc
>= *sizeof_buf
- 1)
6334 /* Make some more room in the buffer. */
6336 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6347 /* Read a packet from the remote machine, with error checking, and
6348 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6349 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6350 rather than timing out; this is used (in synchronous mode) to wait
6351 for a target that is is executing user code to stop. */
6352 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6353 don't have to change all the calls to getpkt to deal with the
6354 return value, because at the moment I don't know what the right
6355 thing to do it for those. */
6363 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
6367 /* Read a packet from the remote machine, with error checking, and
6368 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6369 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6370 rather than timing out; this is used (in synchronous mode) to wait
6371 for a target that is is executing user code to stop. If FOREVER ==
6372 0, this function is allowed to time out gracefully and return an
6373 indication of this to the caller. Otherwise return the number of
6374 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6375 enough reason to return to the caller. */
6378 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
6379 int expecting_notif
)
6381 struct remote_state
*rs
= get_remote_state ();
6387 /* We're reading a new response. Make sure we don't look at a
6388 previously cached response. */
6389 rs
->cached_wait_status
= 0;
6391 strcpy (*buf
, "timeout");
6394 timeout
= watchdog
> 0 ? watchdog
: -1;
6395 else if (expecting_notif
)
6396 timeout
= 0; /* There should already be a char in the buffer. If
6399 timeout
= remote_timeout
;
6403 /* Process any number of notifications, and then return when
6407 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
6409 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
6411 /* This can loop forever if the remote side sends us
6412 characters continuously, but if it pauses, we'll get
6413 SERIAL_TIMEOUT from readchar because of timeout. Then
6414 we'll count that as a retry.
6416 Note that even when forever is set, we will only wait
6417 forever prior to the start of a packet. After that, we
6418 expect characters to arrive at a brisk pace. They should
6419 show up within remote_timeout intervals. */
6421 c
= readchar (timeout
);
6422 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
6424 if (c
== SERIAL_TIMEOUT
)
6426 if (expecting_notif
)
6427 return -1; /* Don't complain, it's normal to not get
6428 anything in this case. */
6430 if (forever
) /* Watchdog went off? Kill the target. */
6434 error (_("Watchdog timeout has expired. Target detached."));
6437 fputs_filtered ("Timed out.\n", gdb_stdlog
);
6441 /* We've found the start of a packet or notification.
6442 Now collect the data. */
6443 val
= read_frame (buf
, sizeof_buf
);
6448 serial_write (remote_desc
, "-", 1);
6451 if (tries
> MAX_TRIES
)
6453 /* We have tried hard enough, and just can't receive the
6454 packet/notification. Give up. */
6455 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
6457 /* Skip the ack char if we're in no-ack mode. */
6458 if (!rs
->noack_mode
)
6459 serial_write (remote_desc
, "+", 1);
6463 /* If we got an ordinary packet, return that to our caller. */
6468 struct cleanup
*old_chain
;
6471 str
= escape_buffer (*buf
, val
);
6472 old_chain
= make_cleanup (xfree
, str
);
6473 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
6474 do_cleanups (old_chain
);
6477 /* Skip the ack char if we're in no-ack mode. */
6478 if (!rs
->noack_mode
)
6479 serial_write (remote_desc
, "+", 1);
6483 /* If we got a notification, handle it, and go back to looking
6487 gdb_assert (c
== '%');
6491 struct cleanup
*old_chain
;
6494 str
= escape_buffer (*buf
, val
);
6495 old_chain
= make_cleanup (xfree
, str
);
6496 fprintf_unfiltered (gdb_stdlog
,
6497 " Notification received: %s\n",
6499 do_cleanups (old_chain
);
6502 handle_notification (*buf
, val
);
6504 /* Notifications require no acknowledgement. */
6506 if (expecting_notif
)
6513 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
6515 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
6519 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
6521 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
6526 remote_kill (struct target_ops
*ops
)
6528 /* Use catch_errors so the user can quit from gdb even when we
6529 aren't on speaking terms with the remote system. */
6530 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
6532 /* Don't wait for it to die. I'm not really sure it matters whether
6533 we do or not. For the existing stubs, kill is a noop. */
6534 target_mourn_inferior ();
6538 remote_vkill (int pid
, struct remote_state
*rs
)
6540 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6543 /* Tell the remote target to detach. */
6544 sprintf (rs
->buf
, "vKill;%x", pid
);
6546 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6548 if (packet_ok (rs
->buf
,
6549 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
6551 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6558 extended_remote_kill (struct target_ops
*ops
)
6561 int pid
= ptid_get_pid (inferior_ptid
);
6562 struct remote_state
*rs
= get_remote_state ();
6564 res
= remote_vkill (pid
, rs
);
6565 if (res
== -1 && !remote_multi_process_p (rs
))
6567 /* Don't try 'k' on a multi-process aware stub -- it has no way
6568 to specify the pid. */
6572 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6573 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
6576 /* Don't wait for it to die. I'm not really sure it matters whether
6577 we do or not. For the existing stubs, kill is a noop. */
6583 error (_("Can't kill process"));
6585 target_mourn_inferior ();
6589 remote_mourn (struct target_ops
*ops
)
6591 remote_mourn_1 (ops
);
6594 /* Worker function for remote_mourn. */
6596 remote_mourn_1 (struct target_ops
*target
)
6598 unpush_target (target
);
6600 /* remote_close takes care of doing most of the clean up. */
6601 generic_mourn_inferior ();
6605 extended_remote_mourn_1 (struct target_ops
*target
)
6607 struct remote_state
*rs
= get_remote_state ();
6609 /* In case we got here due to an error, but we're going to stay
6611 rs
->waiting_for_stop_reply
= 0;
6613 /* We're no longer interested in these events. */
6614 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
6616 /* If the current general thread belonged to the process we just
6617 detached from or has exited, the remote side current general
6618 thread becomes undefined. Considering a case like this:
6620 - We just got here due to a detach.
6621 - The process that we're detaching from happens to immediately
6622 report a global breakpoint being hit in non-stop mode, in the
6623 same thread we had selected before.
6624 - GDB attaches to this process again.
6625 - This event happens to be the next event we handle.
6627 GDB would consider that the current general thread didn't need to
6628 be set on the stub side (with Hg), since for all it knew,
6629 GENERAL_THREAD hadn't changed.
6631 Notice that although in all-stop mode, the remote server always
6632 sets the current thread to the thread reporting the stop event,
6633 that doesn't happen in non-stop mode; in non-stop, the stub *must
6634 not* change the current thread when reporting a breakpoint hit,
6635 due to the decoupling of event reporting and event handling.
6637 To keep things simple, we always invalidate our notion of the
6639 record_currthread (minus_one_ptid
);
6641 /* Unlike "target remote", we do not want to unpush the target; then
6642 the next time the user says "run", we won't be connected. */
6644 /* Call common code to mark the inferior as not running. */
6645 generic_mourn_inferior ();
6647 if (!have_inferiors ())
6649 if (!remote_multi_process_p (rs
))
6651 /* Check whether the target is running now - some remote stubs
6652 automatically restart after kill. */
6654 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6656 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
6658 /* Assume that the target has been restarted. Set inferior_ptid
6659 so that bits of core GDB realizes there's something here, e.g.,
6660 so that the user can say "kill" again. */
6661 inferior_ptid
= magic_null_ptid
;
6668 extended_remote_mourn (struct target_ops
*ops
)
6670 extended_remote_mourn_1 (ops
);
6674 extended_remote_run (char *args
)
6676 struct remote_state
*rs
= get_remote_state ();
6680 /* If the user has disabled vRun support, or we have detected that
6681 support is not available, do not try it. */
6682 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6685 strcpy (rs
->buf
, "vRun;");
6686 len
= strlen (rs
->buf
);
6688 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
6689 error (_("Remote file name too long for run packet"));
6690 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
6692 gdb_assert (args
!= NULL
);
6695 struct cleanup
*back_to
;
6699 argv
= gdb_buildargv (args
);
6700 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
6701 for (i
= 0; argv
[i
] != NULL
; i
++)
6703 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
6704 error (_("Argument list too long for run packet"));
6705 rs
->buf
[len
++] = ';';
6706 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
6708 do_cleanups (back_to
);
6711 rs
->buf
[len
++] = '\0';
6714 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6716 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
6718 /* We have a wait response; we don't need it, though. All is well. */
6721 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6722 /* It wasn't disabled before, but it is now. */
6726 if (remote_exec_file
[0] == '\0')
6727 error (_("Running the default executable on the remote target failed; "
6728 "try \"set remote exec-file\"?"));
6730 error (_("Running \"%s\" on the remote target failed"),
6735 /* In the extended protocol we want to be able to do things like
6736 "run" and have them basically work as expected. So we need
6737 a special create_inferior function. We support changing the
6738 executable file and the command line arguments, but not the
6742 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
6743 char **env
, int from_tty
)
6745 /* If running asynchronously, register the target file descriptor
6746 with the event loop. */
6747 if (target_can_async_p ())
6748 target_async (inferior_event_handler
, 0);
6750 /* Now restart the remote server. */
6751 if (extended_remote_run (args
) == -1)
6753 /* vRun was not supported. Fail if we need it to do what the
6755 if (remote_exec_file
[0])
6756 error (_("Remote target does not support \"set remote exec-file\""));
6758 error (_("Remote target does not support \"set args\" or run <ARGS>"));
6760 /* Fall back to "R". */
6761 extended_remote_restart ();
6764 /* Clean up from the last time we ran, before we mark the target
6765 running again. This will mark breakpoints uninserted, and
6766 get_offsets may insert breakpoints. */
6767 init_thread_list ();
6768 init_wait_for_inferior ();
6770 /* Now mark the inferior as running before we do anything else. */
6771 inferior_ptid
= magic_null_ptid
;
6773 /* Now, if we have thread information, update inferior_ptid. */
6774 inferior_ptid
= remote_current_thread (inferior_ptid
);
6776 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
6777 add_thread_silent (inferior_ptid
);
6779 /* Get updated offsets, if the stub uses qOffsets. */
6784 extended_remote_create_inferior (struct target_ops
*ops
,
6785 char *exec_file
, char *args
,
6786 char **env
, int from_tty
)
6788 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
6792 /* Insert a breakpoint. On targets that have software breakpoint
6793 support, we ask the remote target to do the work; on targets
6794 which don't, we insert a traditional memory breakpoint. */
6797 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
6798 struct bp_target_info
*bp_tgt
)
6800 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
6801 If it succeeds, then set the support to PACKET_ENABLE. If it
6802 fails, and the user has explicitly requested the Z support then
6803 report an error, otherwise, mark it disabled and go on. */
6805 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6807 CORE_ADDR addr
= bp_tgt
->placed_address
;
6808 struct remote_state
*rs
;
6812 gdbarch_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
6814 rs
= get_remote_state ();
6820 addr
= (ULONGEST
) remote_address_masked (addr
);
6821 p
+= hexnumstr (p
, addr
);
6822 sprintf (p
, ",%d", bpsize
);
6825 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6827 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
6832 bp_tgt
->placed_address
= addr
;
6833 bp_tgt
->placed_size
= bpsize
;
6835 case PACKET_UNKNOWN
:
6840 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
6844 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
6845 struct bp_target_info
*bp_tgt
)
6847 CORE_ADDR addr
= bp_tgt
->placed_address
;
6848 struct remote_state
*rs
= get_remote_state ();
6851 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6859 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
6860 p
+= hexnumstr (p
, addr
);
6861 sprintf (p
, ",%d", bp_tgt
->placed_size
);
6864 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6866 return (rs
->buf
[0] == 'E');
6869 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
6873 watchpoint_to_Z_packet (int type
)
6878 return Z_PACKET_WRITE_WP
;
6881 return Z_PACKET_READ_WP
;
6884 return Z_PACKET_ACCESS_WP
;
6887 internal_error (__FILE__
, __LINE__
,
6888 _("hw_bp_to_z: bad watchpoint type %d"), type
);
6893 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
6895 struct remote_state
*rs
= get_remote_state ();
6897 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6899 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6902 sprintf (rs
->buf
, "Z%x,", packet
);
6903 p
= strchr (rs
->buf
, '\0');
6904 addr
= remote_address_masked (addr
);
6905 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6906 sprintf (p
, ",%x", len
);
6909 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6911 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6914 case PACKET_UNKNOWN
:
6919 internal_error (__FILE__
, __LINE__
,
6920 _("remote_insert_watchpoint: reached end of function"));
6925 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
6927 struct remote_state
*rs
= get_remote_state ();
6929 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6931 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6934 sprintf (rs
->buf
, "z%x,", packet
);
6935 p
= strchr (rs
->buf
, '\0');
6936 addr
= remote_address_masked (addr
);
6937 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6938 sprintf (p
, ",%x", len
);
6940 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6942 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6945 case PACKET_UNKNOWN
:
6950 internal_error (__FILE__
, __LINE__
,
6951 _("remote_remove_watchpoint: reached end of function"));
6955 int remote_hw_watchpoint_limit
= -1;
6956 int remote_hw_breakpoint_limit
= -1;
6959 remote_check_watch_resources (int type
, int cnt
, int ot
)
6961 if (type
== bp_hardware_breakpoint
)
6963 if (remote_hw_breakpoint_limit
== 0)
6965 else if (remote_hw_breakpoint_limit
< 0)
6967 else if (cnt
<= remote_hw_breakpoint_limit
)
6972 if (remote_hw_watchpoint_limit
== 0)
6974 else if (remote_hw_watchpoint_limit
< 0)
6978 else if (cnt
<= remote_hw_watchpoint_limit
)
6985 remote_stopped_by_watchpoint (void)
6987 return remote_stopped_by_watchpoint_p
;
6991 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
6994 if (remote_stopped_by_watchpoint ())
6996 *addr_p
= remote_watch_data_address
;
7005 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7006 struct bp_target_info
*bp_tgt
)
7009 struct remote_state
*rs
;
7012 /* The length field should be set to the size of a breakpoint
7013 instruction, even though we aren't inserting one ourselves. */
7015 gdbarch_breakpoint_from_pc
7016 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7018 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7021 rs
= get_remote_state ();
7028 addr
= remote_address_masked (bp_tgt
->placed_address
);
7029 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7030 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7033 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7035 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7038 case PACKET_UNKNOWN
:
7043 internal_error (__FILE__
, __LINE__
,
7044 _("remote_insert_hw_breakpoint: reached end of function"));
7049 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7050 struct bp_target_info
*bp_tgt
)
7053 struct remote_state
*rs
= get_remote_state ();
7056 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7063 addr
= remote_address_masked (bp_tgt
->placed_address
);
7064 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7065 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7068 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7070 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7073 case PACKET_UNKNOWN
:
7078 internal_error (__FILE__
, __LINE__
,
7079 _("remote_remove_hw_breakpoint: reached end of function"));
7082 /* Table used by the crc32 function to calcuate the checksum. */
7084 static unsigned long crc32_table
[256] =
7087 static unsigned long
7088 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
7090 if (!crc32_table
[1])
7092 /* Initialize the CRC table and the decoding table. */
7096 for (i
= 0; i
< 256; i
++)
7098 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7099 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7106 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7112 /* compare-sections command
7114 With no arguments, compares each loadable section in the exec bfd
7115 with the same memory range on the target, and reports mismatches.
7116 Useful for verifying the image on the target against the exec file.
7117 Depends on the target understanding the new "qCRC:" request. */
7119 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7120 target method (target verify memory) and generic version of the
7121 actual command. This will allow other high-level code (especially
7122 generic_load()) to make use of this target functionality. */
7125 compare_sections_command (char *args
, int from_tty
)
7127 struct remote_state
*rs
= get_remote_state ();
7129 unsigned long host_crc
, target_crc
;
7130 struct cleanup
*old_chain
;
7133 const char *sectname
;
7140 error (_("command cannot be used without an exec file"));
7141 if (!current_target
.to_shortname
||
7142 strcmp (current_target
.to_shortname
, "remote") != 0)
7143 error (_("command can only be used with remote target"));
7145 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7147 if (!(s
->flags
& SEC_LOAD
))
7148 continue; /* skip non-loadable section */
7150 size
= bfd_get_section_size (s
);
7152 continue; /* skip zero-length section */
7154 sectname
= bfd_get_section_name (exec_bfd
, s
);
7155 if (args
&& strcmp (args
, sectname
) != 0)
7156 continue; /* not the section selected by user */
7158 matched
= 1; /* do this section */
7160 /* FIXME: assumes lma can fit into long. */
7161 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7162 (long) lma
, (long) size
);
7165 /* Be clever; compute the host_crc before waiting for target
7167 sectdata
= xmalloc (size
);
7168 old_chain
= make_cleanup (xfree
, sectdata
);
7169 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7170 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
7172 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7173 if (rs
->buf
[0] == 'E')
7174 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
7175 paddress (target_gdbarch
, lma
),
7176 paddress (target_gdbarch
, lma
+ size
));
7177 if (rs
->buf
[0] != 'C')
7178 error (_("remote target does not support this operation"));
7180 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7181 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7183 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
7184 paddress (target_gdbarch
, lma
),
7185 paddress (target_gdbarch
, lma
+ size
));
7186 if (host_crc
== target_crc
)
7187 printf_filtered ("matched.\n");
7190 printf_filtered ("MIS-MATCHED!\n");
7194 do_cleanups (old_chain
);
7197 warning (_("One or more sections of the remote executable does not match\n\
7198 the loaded file\n"));
7199 if (args
&& !matched
)
7200 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7203 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7204 into remote target. The number of bytes written to the remote
7205 target is returned, or -1 for error. */
7208 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7209 const char *annex
, const gdb_byte
*writebuf
,
7210 ULONGEST offset
, LONGEST len
,
7211 struct packet_config
*packet
)
7216 struct remote_state
*rs
= get_remote_state ();
7217 int max_size
= get_memory_write_packet_size ();
7219 if (packet
->support
== PACKET_DISABLE
)
7222 /* Insert header. */
7223 i
= snprintf (rs
->buf
, max_size
,
7224 "qXfer:%s:write:%s:%s:",
7225 object_name
, annex
? annex
: "",
7226 phex_nz (offset
, sizeof offset
));
7227 max_size
-= (i
+ 1);
7229 /* Escape as much data as fits into rs->buf. */
7230 buf_len
= remote_escape_output
7231 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
7233 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
7234 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7235 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7238 unpack_varlen_hex (rs
->buf
, &n
);
7242 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7243 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7244 number of bytes read is returned, or 0 for EOF, or -1 for error.
7245 The number of bytes read may be less than LEN without indicating an
7246 EOF. PACKET is checked and updated to indicate whether the remote
7247 target supports this object. */
7250 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
7252 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
7253 struct packet_config
*packet
)
7255 static char *finished_object
;
7256 static char *finished_annex
;
7257 static ULONGEST finished_offset
;
7259 struct remote_state
*rs
= get_remote_state ();
7260 unsigned int total
= 0;
7261 LONGEST i
, n
, packet_len
;
7263 if (packet
->support
== PACKET_DISABLE
)
7266 /* Check whether we've cached an end-of-object packet that matches
7268 if (finished_object
)
7270 if (strcmp (object_name
, finished_object
) == 0
7271 && strcmp (annex
? annex
: "", finished_annex
) == 0
7272 && offset
== finished_offset
)
7275 /* Otherwise, we're now reading something different. Discard
7277 xfree (finished_object
);
7278 xfree (finished_annex
);
7279 finished_object
= NULL
;
7280 finished_annex
= NULL
;
7283 /* Request only enough to fit in a single packet. The actual data
7284 may not, since we don't know how much of it will need to be escaped;
7285 the target is free to respond with slightly less data. We subtract
7286 five to account for the response type and the protocol frame. */
7287 n
= min (get_remote_packet_size () - 5, len
);
7288 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7289 object_name
, annex
? annex
: "",
7290 phex_nz (offset
, sizeof offset
),
7291 phex_nz (n
, sizeof n
));
7292 i
= putpkt (rs
->buf
);
7297 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
7298 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7301 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
7302 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
7304 /* 'm' means there is (or at least might be) more data after this
7305 batch. That does not make sense unless there's at least one byte
7306 of data in this reply. */
7307 if (rs
->buf
[0] == 'm' && packet_len
== 1)
7308 error (_("Remote qXfer reply contained no data."));
7310 /* Got some data. */
7311 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
7313 /* 'l' is an EOF marker, possibly including a final block of data,
7314 or possibly empty. If we have the final block of a non-empty
7315 object, record this fact to bypass a subsequent partial read. */
7316 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
7318 finished_object
= xstrdup (object_name
);
7319 finished_annex
= xstrdup (annex
? annex
: "");
7320 finished_offset
= offset
+ i
;
7327 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
7328 const char *annex
, gdb_byte
*readbuf
,
7329 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
7331 struct remote_state
*rs
;
7336 set_general_thread (inferior_ptid
);
7338 rs
= get_remote_state ();
7340 /* Handle memory using the standard memory routines. */
7341 if (object
== TARGET_OBJECT_MEMORY
)
7346 /* If the remote target is connected but not running, we should
7347 pass this request down to a lower stratum (e.g. the executable
7349 if (!target_has_execution
)
7352 if (writebuf
!= NULL
)
7353 xfered
= remote_write_bytes (offset
, writebuf
, len
);
7355 xfered
= remote_read_bytes (offset
, readbuf
, len
);
7359 else if (xfered
== 0 && errno
== 0)
7365 /* Handle SPU memory using qxfer packets. */
7366 if (object
== TARGET_OBJECT_SPU
)
7369 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
7370 &remote_protocol_packets
7371 [PACKET_qXfer_spu_read
]);
7373 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
7374 &remote_protocol_packets
7375 [PACKET_qXfer_spu_write
]);
7378 /* Handle extra signal info using qxfer packets. */
7379 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
7382 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
7383 &remote_protocol_packets
7384 [PACKET_qXfer_siginfo_read
]);
7386 return remote_write_qxfer (ops
, "siginfo", annex
, writebuf
, offset
, len
,
7387 &remote_protocol_packets
7388 [PACKET_qXfer_siginfo_write
]);
7391 /* Only handle flash writes. */
7392 if (writebuf
!= NULL
)
7398 case TARGET_OBJECT_FLASH
:
7399 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
7403 else if (xfered
== 0 && errno
== 0)
7413 /* Map pre-existing objects onto letters. DO NOT do this for new
7414 objects!!! Instead specify new query packets. */
7417 case TARGET_OBJECT_AVR
:
7421 case TARGET_OBJECT_AUXV
:
7422 gdb_assert (annex
== NULL
);
7423 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
7424 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
7426 case TARGET_OBJECT_AVAILABLE_FEATURES
:
7427 return remote_read_qxfer
7428 (ops
, "features", annex
, readbuf
, offset
, len
,
7429 &remote_protocol_packets
[PACKET_qXfer_features
]);
7431 case TARGET_OBJECT_LIBRARIES
:
7432 return remote_read_qxfer
7433 (ops
, "libraries", annex
, readbuf
, offset
, len
,
7434 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
7436 case TARGET_OBJECT_MEMORY_MAP
:
7437 gdb_assert (annex
== NULL
);
7438 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
7439 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
7441 case TARGET_OBJECT_OSDATA
:
7442 /* Should only get here if we're connected. */
7443 gdb_assert (remote_desc
);
7444 return remote_read_qxfer
7445 (ops
, "osdata", annex
, readbuf
, offset
, len
,
7446 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
7452 /* Note: a zero OFFSET and LEN can be used to query the minimum
7454 if (offset
== 0 && len
== 0)
7455 return (get_remote_packet_size ());
7456 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7457 large enough let the caller deal with it. */
7458 if (len
< get_remote_packet_size ())
7460 len
= get_remote_packet_size ();
7462 /* Except for querying the minimum buffer size, target must be open. */
7464 error (_("remote query is only available after target open"));
7466 gdb_assert (annex
!= NULL
);
7467 gdb_assert (readbuf
!= NULL
);
7473 /* We used one buffer char for the remote protocol q command and
7474 another for the query type. As the remote protocol encapsulation
7475 uses 4 chars plus one extra in case we are debugging
7476 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7479 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
7481 /* Bad caller may have sent forbidden characters. */
7482 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
7487 gdb_assert (annex
[i
] == '\0');
7489 i
= putpkt (rs
->buf
);
7493 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7494 strcpy ((char *) readbuf
, rs
->buf
);
7496 return strlen ((char *) readbuf
);
7500 remote_search_memory (struct target_ops
* ops
,
7501 CORE_ADDR start_addr
, ULONGEST search_space_len
,
7502 const gdb_byte
*pattern
, ULONGEST pattern_len
,
7503 CORE_ADDR
*found_addrp
)
7505 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
7506 struct remote_state
*rs
= get_remote_state ();
7507 int max_size
= get_memory_write_packet_size ();
7508 struct packet_config
*packet
=
7509 &remote_protocol_packets
[PACKET_qSearch_memory
];
7510 /* number of packet bytes used to encode the pattern,
7511 this could be more than PATTERN_LEN due to escape characters */
7512 int escaped_pattern_len
;
7513 /* amount of pattern that was encodable in the packet */
7514 int used_pattern_len
;
7517 ULONGEST found_addr
;
7519 /* Don't go to the target if we don't have to.
7520 This is done before checking packet->support to avoid the possibility that
7521 a success for this edge case means the facility works in general. */
7522 if (pattern_len
> search_space_len
)
7524 if (pattern_len
== 0)
7526 *found_addrp
= start_addr
;
7530 /* If we already know the packet isn't supported, fall back to the simple
7531 way of searching memory. */
7533 if (packet
->support
== PACKET_DISABLE
)
7535 /* Target doesn't provided special support, fall back and use the
7536 standard support (copy memory and do the search here). */
7537 return simple_search_memory (ops
, start_addr
, search_space_len
,
7538 pattern
, pattern_len
, found_addrp
);
7541 /* Insert header. */
7542 i
= snprintf (rs
->buf
, max_size
,
7543 "qSearch:memory:%s;%s;",
7544 phex_nz (start_addr
, addr_size
),
7545 phex_nz (search_space_len
, sizeof (search_space_len
)));
7546 max_size
-= (i
+ 1);
7548 /* Escape as much data as fits into rs->buf. */
7549 escaped_pattern_len
=
7550 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
7551 &used_pattern_len
, max_size
);
7553 /* Bail if the pattern is too large. */
7554 if (used_pattern_len
!= pattern_len
)
7555 error ("Pattern is too large to transmit to remote target.");
7557 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
7558 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7559 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7561 /* The request may not have worked because the command is not
7562 supported. If so, fall back to the simple way. */
7563 if (packet
->support
== PACKET_DISABLE
)
7565 return simple_search_memory (ops
, start_addr
, search_space_len
,
7566 pattern
, pattern_len
, found_addrp
);
7571 if (rs
->buf
[0] == '0')
7573 else if (rs
->buf
[0] == '1')
7576 if (rs
->buf
[1] != ',')
7577 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7578 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
7579 *found_addrp
= found_addr
;
7582 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7588 remote_rcmd (char *command
,
7589 struct ui_file
*outbuf
)
7591 struct remote_state
*rs
= get_remote_state ();
7595 error (_("remote rcmd is only available after target open"));
7597 /* Send a NULL command across as an empty command. */
7598 if (command
== NULL
)
7601 /* The query prefix. */
7602 strcpy (rs
->buf
, "qRcmd,");
7603 p
= strchr (rs
->buf
, '\0');
7605 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
7606 error (_("\"monitor\" command ``%s'' is too long."), command
);
7608 /* Encode the actual command. */
7609 bin2hex ((gdb_byte
*) command
, p
, 0);
7611 if (putpkt (rs
->buf
) < 0)
7612 error (_("Communication problem with target."));
7614 /* get/display the response */
7619 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
7621 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7624 error (_("Target does not support this command."));
7625 if (buf
[0] == 'O' && buf
[1] != 'K')
7627 remote_console_output (buf
+ 1); /* 'O' message from stub. */
7630 if (strcmp (buf
, "OK") == 0)
7632 if (strlen (buf
) == 3 && buf
[0] == 'E'
7633 && isdigit (buf
[1]) && isdigit (buf
[2]))
7635 error (_("Protocol error with Rcmd"));
7637 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
7639 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
7640 fputc_unfiltered (c
, outbuf
);
7646 static VEC(mem_region_s
) *
7647 remote_memory_map (struct target_ops
*ops
)
7649 VEC(mem_region_s
) *result
= NULL
;
7650 char *text
= target_read_stralloc (¤t_target
,
7651 TARGET_OBJECT_MEMORY_MAP
, NULL
);
7655 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
7656 result
= parse_memory_map (text
);
7657 do_cleanups (back_to
);
7664 packet_command (char *args
, int from_tty
)
7666 struct remote_state
*rs
= get_remote_state ();
7669 error (_("command can only be used with remote target"));
7672 error (_("remote-packet command requires packet text as argument"));
7674 puts_filtered ("sending: ");
7675 print_packet (args
);
7676 puts_filtered ("\n");
7679 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7680 puts_filtered ("received: ");
7681 print_packet (rs
->buf
);
7682 puts_filtered ("\n");
7686 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
7688 static void display_thread_info (struct gdb_ext_thread_info
*info
);
7690 static void threadset_test_cmd (char *cmd
, int tty
);
7692 static void threadalive_test (char *cmd
, int tty
);
7694 static void threadlist_test_cmd (char *cmd
, int tty
);
7696 int get_and_display_threadinfo (threadref
*ref
);
7698 static void threadinfo_test_cmd (char *cmd
, int tty
);
7700 static int thread_display_step (threadref
*ref
, void *context
);
7702 static void threadlist_update_test_cmd (char *cmd
, int tty
);
7704 static void init_remote_threadtests (void);
7706 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
7709 threadset_test_cmd (char *cmd
, int tty
)
7711 int sample_thread
= SAMPLE_THREAD
;
7713 printf_filtered (_("Remote threadset test\n"));
7714 set_general_thread (sample_thread
);
7719 threadalive_test (char *cmd
, int tty
)
7721 int sample_thread
= SAMPLE_THREAD
;
7722 int pid
= ptid_get_pid (inferior_ptid
);
7723 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
7725 if (remote_thread_alive (ptid
))
7726 printf_filtered ("PASS: Thread alive test\n");
7728 printf_filtered ("FAIL: Thread alive test\n");
7731 void output_threadid (char *title
, threadref
*ref
);
7734 output_threadid (char *title
, threadref
*ref
)
7738 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
7740 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
7744 threadlist_test_cmd (char *cmd
, int tty
)
7747 threadref nextthread
;
7748 int done
, result_count
;
7749 threadref threadlist
[3];
7751 printf_filtered ("Remote Threadlist test\n");
7752 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
7753 &result_count
, &threadlist
[0]))
7754 printf_filtered ("FAIL: threadlist test\n");
7757 threadref
*scan
= threadlist
;
7758 threadref
*limit
= scan
+ result_count
;
7760 while (scan
< limit
)
7761 output_threadid (" thread ", scan
++);
7766 display_thread_info (struct gdb_ext_thread_info
*info
)
7768 output_threadid ("Threadid: ", &info
->threadid
);
7769 printf_filtered ("Name: %s\n ", info
->shortname
);
7770 printf_filtered ("State: %s\n", info
->display
);
7771 printf_filtered ("other: %s\n\n", info
->more_display
);
7775 get_and_display_threadinfo (threadref
*ref
)
7779 struct gdb_ext_thread_info threadinfo
;
7781 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
7782 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
7783 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
7784 display_thread_info (&threadinfo
);
7789 threadinfo_test_cmd (char *cmd
, int tty
)
7791 int athread
= SAMPLE_THREAD
;
7795 int_to_threadref (&thread
, athread
);
7796 printf_filtered ("Remote Threadinfo test\n");
7797 if (!get_and_display_threadinfo (&thread
))
7798 printf_filtered ("FAIL cannot get thread info\n");
7802 thread_display_step (threadref
*ref
, void *context
)
7804 /* output_threadid(" threadstep ",ref); *//* simple test */
7805 return get_and_display_threadinfo (ref
);
7809 threadlist_update_test_cmd (char *cmd
, int tty
)
7811 printf_filtered ("Remote Threadlist update test\n");
7812 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
7816 init_remote_threadtests (void)
7818 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
7819 Fetch and print the remote list of thread identifiers, one pkt only"));
7820 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
7821 _("Fetch and display info about one thread"));
7822 add_com ("tset", class_obscure
, threadset_test_cmd
,
7823 _("Test setting to a different thread"));
7824 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
7825 _("Iterate through updating all remote thread info"));
7826 add_com ("talive", class_obscure
, threadalive_test
,
7827 _(" Remote thread alive test "));
7832 /* Convert a thread ID to a string. Returns the string in a static
7836 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
7838 static char buf
[64];
7839 struct remote_state
*rs
= get_remote_state ();
7841 if (ptid_equal (magic_null_ptid
, ptid
))
7843 xsnprintf (buf
, sizeof buf
, "Thread <main>");
7846 else if (remote_multi_process_p (rs
)
7847 && ptid_get_tid (ptid
) != 0 && ptid_get_pid (ptid
) != 0)
7849 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
7850 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
7853 else if (ptid_get_tid (ptid
) != 0)
7855 xsnprintf (buf
, sizeof buf
, "Thread %ld",
7856 ptid_get_tid (ptid
));
7860 return normal_pid_to_str (ptid
);
7863 /* Get the address of the thread local variable in OBJFILE which is
7864 stored at OFFSET within the thread local storage for thread PTID. */
7867 remote_get_thread_local_address (struct target_ops
*ops
,
7868 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
7870 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
7872 struct remote_state
*rs
= get_remote_state ();
7874 char *endp
= rs
->buf
+ get_remote_packet_size ();
7875 enum packet_result result
;
7877 strcpy (p
, "qGetTLSAddr:");
7879 p
= write_ptid (p
, endp
, ptid
);
7881 p
+= hexnumstr (p
, offset
);
7883 p
+= hexnumstr (p
, lm
);
7887 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7888 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
7889 if (result
== PACKET_OK
)
7893 unpack_varlen_hex (rs
->buf
, &result
);
7896 else if (result
== PACKET_UNKNOWN
)
7897 throw_error (TLS_GENERIC_ERROR
,
7898 _("Remote target doesn't support qGetTLSAddr packet"));
7900 throw_error (TLS_GENERIC_ERROR
,
7901 _("Remote target failed to process qGetTLSAddr request"));
7904 throw_error (TLS_GENERIC_ERROR
,
7905 _("TLS not supported or disabled on this target"));
7910 /* Support for inferring a target description based on the current
7911 architecture and the size of a 'g' packet. While the 'g' packet
7912 can have any size (since optional registers can be left off the
7913 end), some sizes are easily recognizable given knowledge of the
7914 approximate architecture. */
7916 struct remote_g_packet_guess
7919 const struct target_desc
*tdesc
;
7921 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
7922 DEF_VEC_O(remote_g_packet_guess_s
);
7924 struct remote_g_packet_data
7926 VEC(remote_g_packet_guess_s
) *guesses
;
7929 static struct gdbarch_data
*remote_g_packet_data_handle
;
7932 remote_g_packet_data_init (struct obstack
*obstack
)
7934 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
7938 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
7939 const struct target_desc
*tdesc
)
7941 struct remote_g_packet_data
*data
7942 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
7943 struct remote_g_packet_guess new_guess
, *guess
;
7946 gdb_assert (tdesc
!= NULL
);
7949 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7951 if (guess
->bytes
== bytes
)
7952 internal_error (__FILE__
, __LINE__
,
7953 "Duplicate g packet description added for size %d",
7956 new_guess
.bytes
= bytes
;
7957 new_guess
.tdesc
= tdesc
;
7958 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
7961 /* Return 1 if remote_read_description would do anything on this target
7962 and architecture, 0 otherwise. */
7965 remote_read_description_p (struct target_ops
*target
)
7967 struct remote_g_packet_data
*data
7968 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7970 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7976 static const struct target_desc
*
7977 remote_read_description (struct target_ops
*target
)
7979 struct remote_g_packet_data
*data
7980 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7982 /* Do not try this during initial connection, when we do not know
7983 whether there is a running but stopped thread. */
7984 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
7987 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7989 struct remote_g_packet_guess
*guess
;
7991 int bytes
= send_g_packet ();
7994 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7996 if (guess
->bytes
== bytes
)
7997 return guess
->tdesc
;
7999 /* We discard the g packet. A minor optimization would be to
8000 hold on to it, and fill the register cache once we have selected
8001 an architecture, but it's too tricky to do safely. */
8007 /* Remote file transfer support. This is host-initiated I/O, not
8008 target-initiated; for target-initiated, see remote-fileio.c. */
8010 /* If *LEFT is at least the length of STRING, copy STRING to
8011 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8012 decrease *LEFT. Otherwise raise an error. */
8015 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8017 int len
= strlen (string
);
8020 error (_("Packet too long for target."));
8022 memcpy (*buffer
, string
, len
);
8026 /* NUL-terminate the buffer as a convenience, if there is
8032 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8033 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8034 decrease *LEFT. Otherwise raise an error. */
8037 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8040 if (2 * len
> *left
)
8041 error (_("Packet too long for target."));
8043 bin2hex (bytes
, *buffer
, len
);
8047 /* NUL-terminate the buffer as a convenience, if there is
8053 /* If *LEFT is large enough, convert VALUE to hex and add it to
8054 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8055 decrease *LEFT. Otherwise raise an error. */
8058 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8060 int len
= hexnumlen (value
);
8063 error (_("Packet too long for target."));
8065 hexnumstr (*buffer
, value
);
8069 /* NUL-terminate the buffer as a convenience, if there is
8075 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8076 value, *REMOTE_ERRNO to the remote error number or zero if none
8077 was included, and *ATTACHMENT to point to the start of the annex
8078 if any. The length of the packet isn't needed here; there may
8079 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8081 Return 0 if the packet could be parsed, -1 if it could not. If
8082 -1 is returned, the other variables may not be initialized. */
8085 remote_hostio_parse_result (char *buffer
, int *retcode
,
8086 int *remote_errno
, char **attachment
)
8093 if (buffer
[0] != 'F')
8097 *retcode
= strtol (&buffer
[1], &p
, 16);
8098 if (errno
!= 0 || p
== &buffer
[1])
8101 /* Check for ",errno". */
8105 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8106 if (errno
!= 0 || p
+ 1 == p2
)
8111 /* Check for ";attachment". If there is no attachment, the
8112 packet should end here. */
8115 *attachment
= p
+ 1;
8118 else if (*p
== '\0')
8124 /* Send a prepared I/O packet to the target and read its response.
8125 The prepared packet is in the global RS->BUF before this function
8126 is called, and the answer is there when we return.
8128 COMMAND_BYTES is the length of the request to send, which may include
8129 binary data. WHICH_PACKET is the packet configuration to check
8130 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8131 is set to the error number and -1 is returned. Otherwise the value
8132 returned by the function is returned.
8134 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8135 attachment is expected; an error will be reported if there's a
8136 mismatch. If one is found, *ATTACHMENT will be set to point into
8137 the packet buffer and *ATTACHMENT_LEN will be set to the
8138 attachment's length. */
8141 remote_hostio_send_command (int command_bytes
, int which_packet
,
8142 int *remote_errno
, char **attachment
,
8143 int *attachment_len
)
8145 struct remote_state
*rs
= get_remote_state ();
8146 int ret
, bytes_read
;
8147 char *attachment_tmp
;
8150 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
8152 *remote_errno
= FILEIO_ENOSYS
;
8156 putpkt_binary (rs
->buf
, command_bytes
);
8157 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8159 /* If it timed out, something is wrong. Don't try to parse the
8163 *remote_errno
= FILEIO_EINVAL
;
8167 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
8170 *remote_errno
= FILEIO_EINVAL
;
8172 case PACKET_UNKNOWN
:
8173 *remote_errno
= FILEIO_ENOSYS
;
8179 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
8182 *remote_errno
= FILEIO_EINVAL
;
8186 /* Make sure we saw an attachment if and only if we expected one. */
8187 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
8188 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
8190 *remote_errno
= FILEIO_EINVAL
;
8194 /* If an attachment was found, it must point into the packet buffer;
8195 work out how many bytes there were. */
8196 if (attachment_tmp
!= NULL
)
8198 *attachment
= attachment_tmp
;
8199 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
8205 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8206 remote file descriptor, or -1 if an error occurs (and set
8210 remote_hostio_open (const char *filename
, int flags
, int mode
,
8213 struct remote_state
*rs
= get_remote_state ();
8215 int left
= get_remote_packet_size () - 1;
8217 remote_buffer_add_string (&p
, &left
, "vFile:open:");
8219 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8221 remote_buffer_add_string (&p
, &left
, ",");
8223 remote_buffer_add_int (&p
, &left
, flags
);
8224 remote_buffer_add_string (&p
, &left
, ",");
8226 remote_buffer_add_int (&p
, &left
, mode
);
8228 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
8229 remote_errno
, NULL
, NULL
);
8232 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8233 Return the number of bytes written, or -1 if an error occurs (and
8234 set *REMOTE_ERRNO). */
8237 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
8238 ULONGEST offset
, int *remote_errno
)
8240 struct remote_state
*rs
= get_remote_state ();
8242 int left
= get_remote_packet_size ();
8245 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
8247 remote_buffer_add_int (&p
, &left
, fd
);
8248 remote_buffer_add_string (&p
, &left
, ",");
8250 remote_buffer_add_int (&p
, &left
, offset
);
8251 remote_buffer_add_string (&p
, &left
, ",");
8253 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
8254 get_remote_packet_size () - (p
- rs
->buf
));
8256 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
8257 remote_errno
, NULL
, NULL
);
8260 /* Read up to LEN bytes FD on the remote target into READ_BUF
8261 Return the number of bytes read, or -1 if an error occurs (and
8262 set *REMOTE_ERRNO). */
8265 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
8266 ULONGEST offset
, int *remote_errno
)
8268 struct remote_state
*rs
= get_remote_state ();
8271 int left
= get_remote_packet_size ();
8272 int ret
, attachment_len
;
8275 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
8277 remote_buffer_add_int (&p
, &left
, fd
);
8278 remote_buffer_add_string (&p
, &left
, ",");
8280 remote_buffer_add_int (&p
, &left
, len
);
8281 remote_buffer_add_string (&p
, &left
, ",");
8283 remote_buffer_add_int (&p
, &left
, offset
);
8285 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
8286 remote_errno
, &attachment
,
8292 read_len
= remote_unescape_input (attachment
, attachment_len
,
8294 if (read_len
!= ret
)
8295 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
8300 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8301 (and set *REMOTE_ERRNO). */
8304 remote_hostio_close (int fd
, int *remote_errno
)
8306 struct remote_state
*rs
= get_remote_state ();
8308 int left
= get_remote_packet_size () - 1;
8310 remote_buffer_add_string (&p
, &left
, "vFile:close:");
8312 remote_buffer_add_int (&p
, &left
, fd
);
8314 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
8315 remote_errno
, NULL
, NULL
);
8318 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8319 occurs (and set *REMOTE_ERRNO). */
8322 remote_hostio_unlink (const char *filename
, int *remote_errno
)
8324 struct remote_state
*rs
= get_remote_state ();
8326 int left
= get_remote_packet_size () - 1;
8328 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
8330 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8333 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
8334 remote_errno
, NULL
, NULL
);
8338 remote_fileio_errno_to_host (int errnum
)
8362 case FILEIO_ENOTDIR
:
8382 case FILEIO_ENAMETOOLONG
:
8383 return ENAMETOOLONG
;
8389 remote_hostio_error (int errnum
)
8391 int host_error
= remote_fileio_errno_to_host (errnum
);
8393 if (host_error
== -1)
8394 error (_("Unknown remote I/O error %d"), errnum
);
8396 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
8400 remote_hostio_close_cleanup (void *opaque
)
8402 int fd
= *(int *) opaque
;
8405 remote_hostio_close (fd
, &remote_errno
);
8410 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
8412 const char *filename
= bfd_get_filename (abfd
);
8413 int fd
, remote_errno
;
8416 gdb_assert (remote_filename_p (filename
));
8418 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
8421 errno
= remote_fileio_errno_to_host (remote_errno
);
8422 bfd_set_error (bfd_error_system_call
);
8426 stream
= xmalloc (sizeof (int));
8432 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
8434 int fd
= *(int *)stream
;
8439 /* Ignore errors on close; these may happen if the remote
8440 connection was already torn down. */
8441 remote_hostio_close (fd
, &remote_errno
);
8447 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
8448 file_ptr nbytes
, file_ptr offset
)
8450 int fd
= *(int *)stream
;
8452 file_ptr pos
, bytes
;
8455 while (nbytes
> pos
)
8457 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
8458 offset
+ pos
, &remote_errno
);
8460 /* Success, but no bytes, means end-of-file. */
8464 errno
= remote_fileio_errno_to_host (remote_errno
);
8465 bfd_set_error (bfd_error_system_call
);
8476 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
8478 /* FIXME: We should probably implement remote_hostio_stat. */
8479 sb
->st_size
= INT_MAX
;
8484 remote_filename_p (const char *filename
)
8486 return strncmp (filename
, "remote:", 7) == 0;
8490 remote_bfd_open (const char *remote_file
, const char *target
)
8492 return bfd_openr_iovec (remote_file
, target
,
8493 remote_bfd_iovec_open
, NULL
,
8494 remote_bfd_iovec_pread
,
8495 remote_bfd_iovec_close
,
8496 remote_bfd_iovec_stat
);
8500 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
8502 struct cleanup
*back_to
, *close_cleanup
;
8503 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8506 int bytes_in_buffer
;
8511 error (_("command can only be used with remote target"));
8513 file
= fopen (local_file
, "rb");
8515 perror_with_name (local_file
);
8516 back_to
= make_cleanup_fclose (file
);
8518 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
8520 0700, &remote_errno
);
8522 remote_hostio_error (remote_errno
);
8524 /* Send up to this many bytes at once. They won't all fit in the
8525 remote packet limit, so we'll transfer slightly fewer. */
8526 io_size
= get_remote_packet_size ();
8527 buffer
= xmalloc (io_size
);
8528 make_cleanup (xfree
, buffer
);
8530 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8532 bytes_in_buffer
= 0;
8535 while (bytes_in_buffer
|| !saw_eof
)
8539 bytes
= fread (buffer
+ bytes_in_buffer
, 1, io_size
- bytes_in_buffer
,
8544 error (_("Error reading %s."), local_file
);
8547 /* EOF. Unless there is something still in the
8548 buffer from the last iteration, we are done. */
8550 if (bytes_in_buffer
== 0)
8558 bytes
+= bytes_in_buffer
;
8559 bytes_in_buffer
= 0;
8561 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
, offset
, &remote_errno
);
8564 remote_hostio_error (remote_errno
);
8565 else if (retcode
== 0)
8566 error (_("Remote write of %d bytes returned 0!"), bytes
);
8567 else if (retcode
< bytes
)
8569 /* Short write. Save the rest of the read data for the next
8571 bytes_in_buffer
= bytes
- retcode
;
8572 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
8578 discard_cleanups (close_cleanup
);
8579 if (remote_hostio_close (fd
, &remote_errno
))
8580 remote_hostio_error (remote_errno
);
8583 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
8584 do_cleanups (back_to
);
8588 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
8590 struct cleanup
*back_to
, *close_cleanup
;
8591 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8597 error (_("command can only be used with remote target"));
8599 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
8601 remote_hostio_error (remote_errno
);
8603 file
= fopen (local_file
, "wb");
8605 perror_with_name (local_file
);
8606 back_to
= make_cleanup_fclose (file
);
8608 /* Send up to this many bytes at once. They won't all fit in the
8609 remote packet limit, so we'll transfer slightly fewer. */
8610 io_size
= get_remote_packet_size ();
8611 buffer
= xmalloc (io_size
);
8612 make_cleanup (xfree
, buffer
);
8614 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8619 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
8621 /* Success, but no bytes, means end-of-file. */
8624 remote_hostio_error (remote_errno
);
8628 bytes
= fwrite (buffer
, 1, bytes
, file
);
8630 perror_with_name (local_file
);
8633 discard_cleanups (close_cleanup
);
8634 if (remote_hostio_close (fd
, &remote_errno
))
8635 remote_hostio_error (remote_errno
);
8638 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
8639 do_cleanups (back_to
);
8643 remote_file_delete (const char *remote_file
, int from_tty
)
8645 int retcode
, remote_errno
;
8648 error (_("command can only be used with remote target"));
8650 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
8652 remote_hostio_error (remote_errno
);
8655 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
8659 remote_put_command (char *args
, int from_tty
)
8661 struct cleanup
*back_to
;
8665 error_no_arg (_("file to put"));
8667 argv
= gdb_buildargv (args
);
8668 back_to
= make_cleanup_freeargv (argv
);
8669 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8670 error (_("Invalid parameters to remote put"));
8672 remote_file_put (argv
[0], argv
[1], from_tty
);
8674 do_cleanups (back_to
);
8678 remote_get_command (char *args
, int from_tty
)
8680 struct cleanup
*back_to
;
8684 error_no_arg (_("file to get"));
8686 argv
= gdb_buildargv (args
);
8687 back_to
= make_cleanup_freeargv (argv
);
8688 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8689 error (_("Invalid parameters to remote get"));
8691 remote_file_get (argv
[0], argv
[1], from_tty
);
8693 do_cleanups (back_to
);
8697 remote_delete_command (char *args
, int from_tty
)
8699 struct cleanup
*back_to
;
8703 error_no_arg (_("file to delete"));
8705 argv
= gdb_buildargv (args
);
8706 back_to
= make_cleanup_freeargv (argv
);
8707 if (argv
[0] == NULL
|| argv
[1] != NULL
)
8708 error (_("Invalid parameters to remote delete"));
8710 remote_file_delete (argv
[0], from_tty
);
8712 do_cleanups (back_to
);
8716 remote_command (char *args
, int from_tty
)
8718 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
8721 static int remote_target_can_reverse
= 1;
8724 remote_can_execute_reverse (void)
8726 return remote_target_can_reverse
;
8730 remote_supports_non_stop (void)
8736 remote_supports_multi_process (void)
8738 struct remote_state
*rs
= get_remote_state ();
8739 return remote_multi_process_p (rs
);
8743 init_remote_ops (void)
8745 remote_ops
.to_shortname
= "remote";
8746 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
8748 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8749 Specify the serial device it is connected to\n\
8750 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
8751 remote_ops
.to_open
= remote_open
;
8752 remote_ops
.to_close
= remote_close
;
8753 remote_ops
.to_detach
= remote_detach
;
8754 remote_ops
.to_disconnect
= remote_disconnect
;
8755 remote_ops
.to_resume
= remote_resume
;
8756 remote_ops
.to_wait
= remote_wait
;
8757 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
8758 remote_ops
.to_store_registers
= remote_store_registers
;
8759 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
8760 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
8761 remote_ops
.to_files_info
= remote_files_info
;
8762 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
8763 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
8764 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
8765 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
8766 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
8767 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
8768 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
8769 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
8770 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
8771 remote_ops
.to_kill
= remote_kill
;
8772 remote_ops
.to_load
= generic_load
;
8773 remote_ops
.to_mourn_inferior
= remote_mourn
;
8774 remote_ops
.to_thread_alive
= remote_thread_alive
;
8775 remote_ops
.to_find_new_threads
= remote_threads_info
;
8776 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
8777 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
8778 remote_ops
.to_stop
= remote_stop
;
8779 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
8780 remote_ops
.to_rcmd
= remote_rcmd
;
8781 remote_ops
.to_log_command
= serial_log_command
;
8782 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
8783 remote_ops
.to_stratum
= process_stratum
;
8784 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
8785 remote_ops
.to_has_memory
= default_child_has_memory
;
8786 remote_ops
.to_has_stack
= default_child_has_stack
;
8787 remote_ops
.to_has_registers
= default_child_has_registers
;
8788 remote_ops
.to_has_execution
= default_child_has_execution
;
8789 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
8790 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
8791 remote_ops
.to_magic
= OPS_MAGIC
;
8792 remote_ops
.to_memory_map
= remote_memory_map
;
8793 remote_ops
.to_flash_erase
= remote_flash_erase
;
8794 remote_ops
.to_flash_done
= remote_flash_done
;
8795 remote_ops
.to_read_description
= remote_read_description
;
8796 remote_ops
.to_search_memory
= remote_search_memory
;
8797 remote_ops
.to_can_async_p
= remote_can_async_p
;
8798 remote_ops
.to_is_async_p
= remote_is_async_p
;
8799 remote_ops
.to_async
= remote_async
;
8800 remote_ops
.to_async_mask
= remote_async_mask
;
8801 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
8802 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
8803 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
8804 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
8807 /* Set up the extended remote vector by making a copy of the standard
8808 remote vector and adding to it. */
8811 init_extended_remote_ops (void)
8813 extended_remote_ops
= remote_ops
;
8815 extended_remote_ops
.to_shortname
= "extended-remote";
8816 extended_remote_ops
.to_longname
=
8817 "Extended remote serial target in gdb-specific protocol";
8818 extended_remote_ops
.to_doc
=
8819 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8820 Specify the serial device it is connected to (e.g. /dev/ttya).";
8821 extended_remote_ops
.to_open
= extended_remote_open
;
8822 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
8823 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
8824 extended_remote_ops
.to_detach
= extended_remote_detach
;
8825 extended_remote_ops
.to_attach
= extended_remote_attach
;
8826 extended_remote_ops
.to_kill
= extended_remote_kill
;
8830 remote_can_async_p (void)
8832 if (!target_async_permitted
)
8833 /* We only enable async when the user specifically asks for it. */
8836 /* We're async whenever the serial device is. */
8837 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
8841 remote_is_async_p (void)
8843 if (!target_async_permitted
)
8844 /* We only enable async when the user specifically asks for it. */
8847 /* We're async whenever the serial device is. */
8848 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
8851 /* Pass the SERIAL event on and up to the client. One day this code
8852 will be able to delay notifying the client of an event until the
8853 point where an entire packet has been received. */
8855 static void (*async_client_callback
) (enum inferior_event_type event_type
,
8857 static void *async_client_context
;
8858 static serial_event_ftype remote_async_serial_handler
;
8861 remote_async_serial_handler (struct serial
*scb
, void *context
)
8863 /* Don't propogate error information up to the client. Instead let
8864 the client find out about the error by querying the target. */
8865 async_client_callback (INF_REG_EVENT
, async_client_context
);
8869 remote_async_inferior_event_handler (gdb_client_data data
)
8871 inferior_event_handler (INF_REG_EVENT
, NULL
);
8875 remote_async_get_pending_events_handler (gdb_client_data data
)
8877 remote_get_pending_stop_replies ();
8881 remote_async (void (*callback
) (enum inferior_event_type event_type
,
8882 void *context
), void *context
)
8884 if (remote_async_mask_value
== 0)
8885 internal_error (__FILE__
, __LINE__
,
8886 _("Calling remote_async when async is masked"));
8888 if (callback
!= NULL
)
8890 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
8891 async_client_callback
= callback
;
8892 async_client_context
= context
;
8895 serial_async (remote_desc
, NULL
, NULL
);
8899 remote_async_mask (int new_mask
)
8901 int curr_mask
= remote_async_mask_value
;
8902 remote_async_mask_value
= new_mask
;
8907 set_remote_cmd (char *args
, int from_tty
)
8909 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
8913 show_remote_cmd (char *args
, int from_tty
)
8915 /* We can't just use cmd_show_list here, because we want to skip
8916 the redundant "show remote Z-packet" and the legacy aliases. */
8917 struct cleanup
*showlist_chain
;
8918 struct cmd_list_element
*list
= remote_show_cmdlist
;
8920 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
8921 for (; list
!= NULL
; list
= list
->next
)
8922 if (strcmp (list
->name
, "Z-packet") == 0)
8924 else if (list
->type
== not_set_cmd
)
8925 /* Alias commands are exactly like the original, except they
8926 don't have the normal type. */
8930 struct cleanup
*option_chain
8931 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
8932 ui_out_field_string (uiout
, "name", list
->name
);
8933 ui_out_text (uiout
, ": ");
8934 if (list
->type
== show_cmd
)
8935 do_setshow_command ((char *) NULL
, from_tty
, list
);
8937 cmd_func (list
, NULL
, from_tty
);
8938 /* Close the tuple. */
8939 do_cleanups (option_chain
);
8942 /* Close the tuple. */
8943 do_cleanups (showlist_chain
);
8947 /* Function to be called whenever a new objfile (shlib) is detected. */
8949 remote_new_objfile (struct objfile
*objfile
)
8951 if (remote_desc
!= 0) /* Have a remote connection. */
8952 remote_check_symbols (objfile
);
8956 _initialize_remote (void)
8958 struct remote_state
*rs
;
8960 /* architecture specific data */
8961 remote_gdbarch_data_handle
=
8962 gdbarch_data_register_post_init (init_remote_state
);
8963 remote_g_packet_data_handle
=
8964 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
8966 /* Initialize the per-target state. At the moment there is only one
8967 of these, not one per target. Only one target is active at a
8968 time. The default buffer size is unimportant; it will be expanded
8969 whenever a larger buffer is needed. */
8970 rs
= get_remote_state_raw ();
8972 rs
->buf
= xmalloc (rs
->buf_size
);
8975 add_target (&remote_ops
);
8977 init_extended_remote_ops ();
8978 add_target (&extended_remote_ops
);
8980 /* Hook into new objfile notification. */
8981 observer_attach_new_objfile (remote_new_objfile
);
8983 /* Set up signal handlers. */
8984 sigint_remote_token
=
8985 create_async_signal_handler (async_remote_interrupt
, NULL
);
8986 sigint_remote_twice_token
=
8987 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
8990 init_remote_threadtests ();
8993 /* set/show remote ... */
8995 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
8996 Remote protocol specific variables\n\
8997 Configure various remote-protocol specific variables such as\n\
8998 the packets being used"),
8999 &remote_set_cmdlist
, "set remote ",
9000 0 /* allow-unknown */, &setlist
);
9001 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
9002 Remote protocol specific variables\n\
9003 Configure various remote-protocol specific variables such as\n\
9004 the packets being used"),
9005 &remote_show_cmdlist
, "show remote ",
9006 0 /* allow-unknown */, &showlist
);
9008 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
9009 Compare section data on target to the exec file.\n\
9010 Argument is a single section name (default: all loaded sections)."),
9013 add_cmd ("packet", class_maintenance
, packet_command
, _("\
9014 Send an arbitrary packet to a remote target.\n\
9015 maintenance packet TEXT\n\
9016 If GDB is talking to an inferior via the GDB serial protocol, then\n\
9017 this command sends the string TEXT to the inferior, and displays the\n\
9018 response packet. GDB supplies the initial `$' character, and the\n\
9019 terminating `#' character and checksum."),
9022 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
9023 Set whether to send break if interrupted."), _("\
9024 Show whether to send break if interrupted."), _("\
9025 If set, a break, instead of a cntrl-c, is sent to the remote target."),
9026 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
9027 &setlist
, &showlist
);
9029 /* Install commands for configuring memory read/write packets. */
9031 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
9032 Set the maximum number of bytes per memory write packet (deprecated)."),
9034 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
9035 Show the maximum number of bytes per memory write packet (deprecated)."),
9037 add_cmd ("memory-write-packet-size", no_class
,
9038 set_memory_write_packet_size
, _("\
9039 Set the maximum number of bytes per memory-write packet.\n\
9040 Specify the number of bytes in a packet or 0 (zero) for the\n\
9041 default packet size. The actual limit is further reduced\n\
9042 dependent on the target. Specify ``fixed'' to disable the\n\
9043 further restriction and ``limit'' to enable that restriction."),
9044 &remote_set_cmdlist
);
9045 add_cmd ("memory-read-packet-size", no_class
,
9046 set_memory_read_packet_size
, _("\
9047 Set the maximum number of bytes per memory-read packet.\n\
9048 Specify the number of bytes in a packet or 0 (zero) for the\n\
9049 default packet size. The actual limit is further reduced\n\
9050 dependent on the target. Specify ``fixed'' to disable the\n\
9051 further restriction and ``limit'' to enable that restriction."),
9052 &remote_set_cmdlist
);
9053 add_cmd ("memory-write-packet-size", no_class
,
9054 show_memory_write_packet_size
,
9055 _("Show the maximum number of bytes per memory-write packet."),
9056 &remote_show_cmdlist
);
9057 add_cmd ("memory-read-packet-size", no_class
,
9058 show_memory_read_packet_size
,
9059 _("Show the maximum number of bytes per memory-read packet."),
9060 &remote_show_cmdlist
);
9062 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
9063 &remote_hw_watchpoint_limit
, _("\
9064 Set the maximum number of target hardware watchpoints."), _("\
9065 Show the maximum number of target hardware watchpoints."), _("\
9066 Specify a negative limit for unlimited."),
9067 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
9068 &remote_set_cmdlist
, &remote_show_cmdlist
);
9069 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
9070 &remote_hw_breakpoint_limit
, _("\
9071 Set the maximum number of target hardware breakpoints."), _("\
9072 Show the maximum number of target hardware breakpoints."), _("\
9073 Specify a negative limit for unlimited."),
9074 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
9075 &remote_set_cmdlist
, &remote_show_cmdlist
);
9077 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
9078 &remote_address_size
, _("\
9079 Set the maximum size of the address (in bits) in a memory packet."), _("\
9080 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
9082 NULL
, /* FIXME: i18n: */
9083 &setlist
, &showlist
);
9085 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
9086 "X", "binary-download", 1);
9088 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
9089 "vCont", "verbose-resume", 0);
9091 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
9092 "QPassSignals", "pass-signals", 0);
9094 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
9095 "qSymbol", "symbol-lookup", 0);
9097 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
9098 "P", "set-register", 1);
9100 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
9101 "p", "fetch-register", 1);
9103 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
9104 "Z0", "software-breakpoint", 0);
9106 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
9107 "Z1", "hardware-breakpoint", 0);
9109 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
9110 "Z2", "write-watchpoint", 0);
9112 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
9113 "Z3", "read-watchpoint", 0);
9115 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
9116 "Z4", "access-watchpoint", 0);
9118 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
9119 "qXfer:auxv:read", "read-aux-vector", 0);
9121 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
9122 "qXfer:features:read", "target-features", 0);
9124 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
9125 "qXfer:libraries:read", "library-info", 0);
9127 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
9128 "qXfer:memory-map:read", "memory-map", 0);
9130 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
9131 "qXfer:spu:read", "read-spu-object", 0);
9133 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
9134 "qXfer:spu:write", "write-spu-object", 0);
9136 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
9137 "qXfer:osdata:read", "osdata", 0);
9139 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
9140 "qXfer:siginfo:read", "read-siginfo-object", 0);
9142 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
9143 "qXfer:siginfo:write", "write-siginfo-object", 0);
9145 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
9146 "qGetTLSAddr", "get-thread-local-storage-address",
9149 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
9150 "qSupported", "supported-packets", 0);
9152 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
9153 "qSearch:memory", "search-memory", 0);
9155 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
9156 "vFile:open", "hostio-open", 0);
9158 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
9159 "vFile:pread", "hostio-pread", 0);
9161 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
9162 "vFile:pwrite", "hostio-pwrite", 0);
9164 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
9165 "vFile:close", "hostio-close", 0);
9167 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
9168 "vFile:unlink", "hostio-unlink", 0);
9170 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
9171 "vAttach", "attach", 0);
9173 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
9176 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
9177 "QStartNoAckMode", "noack", 0);
9179 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
9180 "vKill", "kill", 0);
9182 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
9183 "qAttached", "query-attached", 0);
9185 /* Keep the old ``set remote Z-packet ...'' working. Each individual
9186 Z sub-packet has its own set and show commands, but users may
9187 have sets to this variable in their .gdbinit files (or in their
9189 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
9190 &remote_Z_packet_detect
, _("\
9191 Set use of remote protocol `Z' packets"), _("\
9192 Show use of remote protocol `Z' packets "), _("\
9193 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
9195 set_remote_protocol_Z_packet_cmd
,
9196 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
9197 &remote_set_cmdlist
, &remote_show_cmdlist
);
9199 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
9200 Manipulate files on the remote system\n\
9201 Transfer files to and from the remote target system."),
9202 &remote_cmdlist
, "remote ",
9203 0 /* allow-unknown */, &cmdlist
);
9205 add_cmd ("put", class_files
, remote_put_command
,
9206 _("Copy a local file to the remote system."),
9209 add_cmd ("get", class_files
, remote_get_command
,
9210 _("Copy a remote file to the local system."),
9213 add_cmd ("delete", class_files
, remote_delete_command
,
9214 _("Delete a remote file."),
9217 remote_exec_file
= xstrdup ("");
9218 add_setshow_string_noescape_cmd ("exec-file", class_files
,
9219 &remote_exec_file
, _("\
9220 Set the remote pathname for \"run\""), _("\
9221 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
9222 &remote_set_cmdlist
, &remote_show_cmdlist
);
9224 /* Eventually initialize fileio. See fileio.c */
9225 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
9227 /* Take advantage of the fact that the LWP field is not used, to tag
9228 special ptids with it set to != 0. */
9229 magic_null_ptid
= ptid_build (42000, 1, -1);
9230 not_sent_ptid
= ptid_build (42000, 1, -2);
9231 any_thread_ptid
= ptid_build (42000, 1, 0);