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
)
4594 struct regcache
*regcache
4595 = get_thread_arch_regcache (ptid
, target_gdbarch
);
4600 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
4602 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
4603 VEC_free (cached_reg_t
, stop_reply
->regcache
);
4606 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
4607 remote_watch_data_address
= stop_reply
->watch_data_address
;
4609 remote_notice_new_inferior (ptid
, 0);
4612 stop_reply_xfree (stop_reply
);
4616 /* The non-stop mode version of target_wait. */
4619 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4621 struct remote_state
*rs
= get_remote_state ();
4622 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4623 ptid_t event_ptid
= null_ptid
;
4624 struct stop_reply
*stop_reply
;
4627 /* If in non-stop mode, get out of getpkt even if a
4628 notification is received. */
4630 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4637 case 'E': /* Error of some sort. */
4638 /* We're out of sync with the target now. Did it continue
4639 or not? We can't tell which thread it was in non-stop,
4640 so just ignore this. */
4641 warning (_("Remote failure reply: %s"), rs
->buf
);
4643 case 'O': /* Console output. */
4644 remote_console_output (rs
->buf
+ 1);
4647 warning (_("Invalid remote reply: %s"), rs
->buf
);
4651 /* Acknowledge a pending stop reply that may have arrived in the
4653 if (pending_stop_reply
!= NULL
)
4654 remote_get_pending_stop_replies ();
4656 /* If indeed we noticed a stop reply, we're done. */
4657 stop_reply
= queued_stop_reply (ptid
);
4658 if (stop_reply
!= NULL
)
4659 return process_stop_reply (stop_reply
, status
);
4661 /* Still no event. If we're just polling for an event, then
4662 return to the event loop. */
4663 if (options
& TARGET_WNOHANG
)
4665 status
->kind
= TARGET_WAITKIND_IGNORE
;
4666 return minus_one_ptid
;
4669 /* Otherwise do a blocking wait. */
4670 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4675 /* Wait until the remote machine stops, then return, storing status in
4676 STATUS just as `wait' would. */
4679 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4681 struct remote_state
*rs
= get_remote_state ();
4682 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4683 ptid_t event_ptid
= null_ptid
;
4685 int solibs_changed
= 0;
4687 struct stop_reply
*stop_reply
;
4691 status
->kind
= TARGET_WAITKIND_IGNORE
;
4692 status
->value
.integer
= 0;
4694 stop_reply
= queued_stop_reply (ptid
);
4695 if (stop_reply
!= NULL
)
4696 return process_stop_reply (stop_reply
, status
);
4698 if (rs
->cached_wait_status
)
4699 /* Use the cached wait status, but only once. */
4700 rs
->cached_wait_status
= 0;
4705 if (!target_is_async_p ())
4707 ofunc
= signal (SIGINT
, remote_interrupt
);
4708 /* If the user hit C-c before this packet, or between packets,
4709 pretend that it was hit right here. */
4713 remote_interrupt (SIGINT
);
4717 /* FIXME: cagney/1999-09-27: If we're in async mode we should
4718 _never_ wait for ever -> test on target_is_async_p().
4719 However, before we do that we need to ensure that the caller
4720 knows how to take the target into/out of async mode. */
4721 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
4722 if (!target_is_async_p ())
4723 signal (SIGINT
, ofunc
);
4728 remote_stopped_by_watchpoint_p
= 0;
4730 /* We got something. */
4731 rs
->waiting_for_stop_reply
= 0;
4735 case 'E': /* Error of some sort. */
4736 /* We're out of sync with the target now. Did it continue or
4737 not? Not is more likely, so report a stop. */
4738 warning (_("Remote failure reply: %s"), buf
);
4739 status
->kind
= TARGET_WAITKIND_STOPPED
;
4740 status
->value
.sig
= TARGET_SIGNAL_0
;
4742 case 'F': /* File-I/O request. */
4743 remote_fileio_request (buf
);
4745 case 'T': case 'S': case 'X': case 'W':
4747 struct stop_reply
*stop_reply
;
4748 struct cleanup
*old_chain
;
4750 stop_reply
= stop_reply_xmalloc ();
4751 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4752 remote_parse_stop_reply (buf
, stop_reply
);
4753 discard_cleanups (old_chain
);
4754 event_ptid
= process_stop_reply (stop_reply
, status
);
4757 case 'O': /* Console output. */
4758 remote_console_output (buf
+ 1);
4760 /* The target didn't really stop; keep waiting. */
4761 rs
->waiting_for_stop_reply
= 1;
4765 if (last_sent_signal
!= TARGET_SIGNAL_0
)
4767 /* Zero length reply means that we tried 'S' or 'C' and the
4768 remote system doesn't support it. */
4769 target_terminal_ours_for_output ();
4771 ("Can't send signals to this remote system. %s not sent.\n",
4772 target_signal_to_name (last_sent_signal
));
4773 last_sent_signal
= TARGET_SIGNAL_0
;
4774 target_terminal_inferior ();
4776 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
4777 putpkt ((char *) buf
);
4779 /* We just told the target to resume, so a stop reply is in
4781 rs
->waiting_for_stop_reply
= 1;
4784 /* else fallthrough */
4786 warning (_("Invalid remote reply: %s"), buf
);
4788 rs
->waiting_for_stop_reply
= 1;
4792 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
4794 /* Nothing interesting happened. If we're doing a non-blocking
4795 poll, we're done. Otherwise, go back to waiting. */
4796 if (options
& TARGET_WNOHANG
)
4797 return minus_one_ptid
;
4801 else if (status
->kind
!= TARGET_WAITKIND_EXITED
4802 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4804 if (!ptid_equal (event_ptid
, null_ptid
))
4805 record_currthread (event_ptid
);
4807 event_ptid
= inferior_ptid
;
4810 /* A process exit. Invalidate our notion of current thread. */
4811 record_currthread (minus_one_ptid
);
4816 /* Wait until the remote machine stops, then return, storing status in
4817 STATUS just as `wait' would. */
4820 remote_wait (struct target_ops
*ops
,
4821 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4826 event_ptid
= remote_wait_ns (ptid
, status
, options
);
4828 event_ptid
= remote_wait_as (ptid
, status
, options
);
4830 if (target_can_async_p ())
4832 /* If there are are events left in the queue tell the event loop
4834 if (stop_reply_queue
)
4835 mark_async_event_handler (remote_async_inferior_event_token
);
4841 /* Fetch a single register using a 'p' packet. */
4844 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
4846 struct remote_state
*rs
= get_remote_state ();
4848 char regp
[MAX_REGISTER_SIZE
];
4851 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
4854 if (reg
->pnum
== -1)
4859 p
+= hexnumstr (p
, reg
->pnum
);
4861 remote_send (&rs
->buf
, &rs
->buf_size
);
4865 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
4869 case PACKET_UNKNOWN
:
4872 error (_("Could not fetch register \"%s\""),
4873 gdbarch_register_name (get_regcache_arch (regcache
), reg
->regnum
));
4876 /* If this register is unfetchable, tell the regcache. */
4879 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
4883 /* Otherwise, parse and supply the value. */
4889 error (_("fetch_register_using_p: early buf termination"));
4891 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4894 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
4898 /* Fetch the registers included in the target's 'g' packet. */
4901 send_g_packet (void)
4903 struct remote_state
*rs
= get_remote_state ();
4908 sprintf (rs
->buf
, "g");
4909 remote_send (&rs
->buf
, &rs
->buf_size
);
4911 /* We can get out of synch in various cases. If the first character
4912 in the buffer is not a hex character, assume that has happened
4913 and try to fetch another packet to read. */
4914 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
4915 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
4916 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
4917 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
4920 fprintf_unfiltered (gdb_stdlog
,
4921 "Bad register packet; fetching a new packet\n");
4922 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4925 buf_len
= strlen (rs
->buf
);
4927 /* Sanity check the received packet. */
4928 if (buf_len
% 2 != 0)
4929 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
4935 process_g_packet (struct regcache
*regcache
)
4937 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
4938 struct remote_state
*rs
= get_remote_state ();
4939 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4944 buf_len
= strlen (rs
->buf
);
4946 /* Further sanity checks, with knowledge of the architecture. */
4947 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
4948 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
4950 /* Save the size of the packet sent to us by the target. It is used
4951 as a heuristic when determining the max size of packets that the
4952 target can safely receive. */
4953 if (rsa
->actual_register_packet_size
== 0)
4954 rsa
->actual_register_packet_size
= buf_len
;
4956 /* If this is smaller than we guessed the 'g' packet would be,
4957 update our records. A 'g' reply that doesn't include a register's
4958 value implies either that the register is not available, or that
4959 the 'p' packet must be used. */
4960 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
4962 rsa
->sizeof_g_packet
= buf_len
/ 2;
4964 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4966 if (rsa
->regs
[i
].pnum
== -1)
4969 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
4970 rsa
->regs
[i
].in_g_packet
= 0;
4972 rsa
->regs
[i
].in_g_packet
= 1;
4976 regs
= alloca (rsa
->sizeof_g_packet
);
4978 /* Unimplemented registers read as all bits zero. */
4979 memset (regs
, 0, rsa
->sizeof_g_packet
);
4981 /* Reply describes registers byte by byte, each byte encoded as two
4982 hex characters. Suck them all up, then supply them to the
4983 register cacheing/storage mechanism. */
4986 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
4988 if (p
[0] == 0 || p
[1] == 0)
4989 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4990 internal_error (__FILE__
, __LINE__
,
4991 "unexpected end of 'g' packet reply");
4993 if (p
[0] == 'x' && p
[1] == 'x')
4994 regs
[i
] = 0; /* 'x' */
4996 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5002 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5004 struct packet_reg
*r
= &rsa
->regs
[i
];
5007 if (r
->offset
* 2 >= strlen (rs
->buf
))
5008 /* This shouldn't happen - we adjusted in_g_packet above. */
5009 internal_error (__FILE__
, __LINE__
,
5010 "unexpected end of 'g' packet reply");
5011 else if (rs
->buf
[r
->offset
* 2] == 'x')
5013 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5014 /* The register isn't available, mark it as such (at
5015 the same time setting the value to zero). */
5016 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5019 regcache_raw_supply (regcache
, r
->regnum
,
5027 fetch_registers_using_g (struct regcache
*regcache
)
5030 process_g_packet (regcache
);
5034 remote_fetch_registers (struct target_ops
*ops
,
5035 struct regcache
*regcache
, int regnum
)
5037 struct remote_state
*rs
= get_remote_state ();
5038 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5041 set_general_thread (inferior_ptid
);
5045 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5046 gdb_assert (reg
!= NULL
);
5048 /* If this register might be in the 'g' packet, try that first -
5049 we are likely to read more than one register. If this is the
5050 first 'g' packet, we might be overly optimistic about its
5051 contents, so fall back to 'p'. */
5052 if (reg
->in_g_packet
)
5054 fetch_registers_using_g (regcache
);
5055 if (reg
->in_g_packet
)
5059 if (fetch_register_using_p (regcache
, reg
))
5062 /* This register is not available. */
5063 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5068 fetch_registers_using_g (regcache
);
5070 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5071 if (!rsa
->regs
[i
].in_g_packet
)
5072 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5074 /* This register is not available. */
5075 regcache_raw_supply (regcache
, i
, NULL
);
5079 /* Prepare to store registers. Since we may send them all (using a
5080 'G' request), we have to read out the ones we don't want to change
5084 remote_prepare_to_store (struct regcache
*regcache
)
5086 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5088 gdb_byte buf
[MAX_REGISTER_SIZE
];
5090 /* Make sure the entire registers array is valid. */
5091 switch (remote_protocol_packets
[PACKET_P
].support
)
5093 case PACKET_DISABLE
:
5094 case PACKET_SUPPORT_UNKNOWN
:
5095 /* Make sure all the necessary registers are cached. */
5096 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5097 if (rsa
->regs
[i
].in_g_packet
)
5098 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5105 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5106 packet was not recognized. */
5109 store_register_using_P (const struct regcache
*regcache
, struct packet_reg
*reg
)
5111 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5112 struct remote_state
*rs
= get_remote_state ();
5113 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5114 /* Try storing a single register. */
5115 char *buf
= rs
->buf
;
5116 gdb_byte regp
[MAX_REGISTER_SIZE
];
5119 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5122 if (reg
->pnum
== -1)
5125 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5126 p
= buf
+ strlen (buf
);
5127 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5128 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5129 remote_send (&rs
->buf
, &rs
->buf_size
);
5131 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5136 error (_("Could not write register \"%s\""),
5137 gdbarch_register_name (gdbarch
, reg
->regnum
));
5138 case PACKET_UNKNOWN
:
5141 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5145 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5146 contents of the register cache buffer. FIXME: ignores errors. */
5149 store_registers_using_G (const struct regcache
*regcache
)
5151 struct remote_state
*rs
= get_remote_state ();
5152 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5156 /* Extract all the registers in the regcache copying them into a
5160 regs
= alloca (rsa
->sizeof_g_packet
);
5161 memset (regs
, 0, rsa
->sizeof_g_packet
);
5162 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5164 struct packet_reg
*r
= &rsa
->regs
[i
];
5166 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5170 /* Command describes registers byte by byte,
5171 each byte encoded as two hex characters. */
5174 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5176 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5177 remote_send (&rs
->buf
, &rs
->buf_size
);
5180 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5181 of the register cache buffer. FIXME: ignores errors. */
5184 remote_store_registers (struct target_ops
*ops
,
5185 struct regcache
*regcache
, int regnum
)
5187 struct remote_state
*rs
= get_remote_state ();
5188 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5191 set_general_thread (inferior_ptid
);
5195 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5196 gdb_assert (reg
!= NULL
);
5198 /* Always prefer to store registers using the 'P' packet if
5199 possible; we often change only a small number of registers.
5200 Sometimes we change a larger number; we'd need help from a
5201 higher layer to know to use 'G'. */
5202 if (store_register_using_P (regcache
, reg
))
5205 /* For now, don't complain if we have no way to write the
5206 register. GDB loses track of unavailable registers too
5207 easily. Some day, this may be an error. We don't have
5208 any way to read the register, either... */
5209 if (!reg
->in_g_packet
)
5212 store_registers_using_G (regcache
);
5216 store_registers_using_G (regcache
);
5218 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5219 if (!rsa
->regs
[i
].in_g_packet
)
5220 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
5221 /* See above for why we do not issue an error here. */
5226 /* Return the number of hex digits in num. */
5229 hexnumlen (ULONGEST num
)
5233 for (i
= 0; num
!= 0; i
++)
5239 /* Set BUF to the minimum number of hex digits representing NUM. */
5242 hexnumstr (char *buf
, ULONGEST num
)
5244 int len
= hexnumlen (num
);
5245 return hexnumnstr (buf
, num
, len
);
5249 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5252 hexnumnstr (char *buf
, ULONGEST num
, int width
)
5258 for (i
= width
- 1; i
>= 0; i
--)
5260 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
5267 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5270 remote_address_masked (CORE_ADDR addr
)
5272 int address_size
= remote_address_size
;
5273 /* If "remoteaddresssize" was not set, default to target address size. */
5275 address_size
= gdbarch_addr_bit (target_gdbarch
);
5277 if (address_size
> 0
5278 && address_size
< (sizeof (ULONGEST
) * 8))
5280 /* Only create a mask when that mask can safely be constructed
5281 in a ULONGEST variable. */
5283 mask
= (mask
<< address_size
) - 1;
5289 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5290 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5291 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5292 (which may be more than *OUT_LEN due to escape characters). The
5293 total number of bytes in the output buffer will be at most
5297 remote_escape_output (const gdb_byte
*buffer
, int len
,
5298 gdb_byte
*out_buf
, int *out_len
,
5301 int input_index
, output_index
;
5304 for (input_index
= 0; input_index
< len
; input_index
++)
5306 gdb_byte b
= buffer
[input_index
];
5308 if (b
== '$' || b
== '#' || b
== '}')
5310 /* These must be escaped. */
5311 if (output_index
+ 2 > out_maxlen
)
5313 out_buf
[output_index
++] = '}';
5314 out_buf
[output_index
++] = b
^ 0x20;
5318 if (output_index
+ 1 > out_maxlen
)
5320 out_buf
[output_index
++] = b
;
5324 *out_len
= input_index
;
5325 return output_index
;
5328 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5329 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5330 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5332 This function reverses remote_escape_output. It allows more
5333 escaped characters than that function does, in particular because
5334 '*' must be escaped to avoid the run-length encoding processing
5335 in reading packets. */
5338 remote_unescape_input (const gdb_byte
*buffer
, int len
,
5339 gdb_byte
*out_buf
, int out_maxlen
)
5341 int input_index
, output_index
;
5346 for (input_index
= 0; input_index
< len
; input_index
++)
5348 gdb_byte b
= buffer
[input_index
];
5350 if (output_index
+ 1 > out_maxlen
)
5352 warning (_("Received too much data from remote target;"
5353 " ignoring overflow."));
5354 return output_index
;
5359 out_buf
[output_index
++] = b
^ 0x20;
5365 out_buf
[output_index
++] = b
;
5369 error (_("Unmatched escape character in target response."));
5371 return output_index
;
5374 /* Determine whether the remote target supports binary downloading.
5375 This is accomplished by sending a no-op memory write of zero length
5376 to the target at the specified address. It does not suffice to send
5377 the whole packet, since many stubs strip the eighth bit and
5378 subsequently compute a wrong checksum, which causes real havoc with
5381 NOTE: This can still lose if the serial line is not eight-bit
5382 clean. In cases like this, the user should clear "remote
5386 check_binary_download (CORE_ADDR addr
)
5388 struct remote_state
*rs
= get_remote_state ();
5390 switch (remote_protocol_packets
[PACKET_X
].support
)
5392 case PACKET_DISABLE
:
5396 case PACKET_SUPPORT_UNKNOWN
:
5402 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5404 p
+= hexnumstr (p
, (ULONGEST
) 0);
5408 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5409 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5411 if (rs
->buf
[0] == '\0')
5414 fprintf_unfiltered (gdb_stdlog
,
5415 "binary downloading NOT suppported by target\n");
5416 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
5421 fprintf_unfiltered (gdb_stdlog
,
5422 "binary downloading suppported by target\n");
5423 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
5430 /* Write memory data directly to the remote machine.
5431 This does not inform the data cache; the data cache uses this.
5432 HEADER is the starting part of the packet.
5433 MEMADDR is the address in the remote memory space.
5434 MYADDR is the address of the buffer in our space.
5435 LEN is the number of bytes.
5436 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
5437 should send data as binary ('X'), or hex-encoded ('M').
5439 The function creates packet of the form
5440 <HEADER><ADDRESS>,<LENGTH>:<DATA>
5442 where encoding of <DATA> is termined by PACKET_FORMAT.
5444 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
5447 Returns the number of bytes transferred, or 0 (setting errno) for
5448 error. Only transfer a single packet. */
5451 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
5452 const gdb_byte
*myaddr
, int len
,
5453 char packet_format
, int use_length
)
5455 struct remote_state
*rs
= get_remote_state ();
5465 if (packet_format
!= 'X' && packet_format
!= 'M')
5466 internal_error (__FILE__
, __LINE__
,
5467 "remote_write_bytes_aux: bad packet format");
5472 payload_size
= get_memory_write_packet_size ();
5474 /* The packet buffer will be large enough for the payload;
5475 get_memory_packet_size ensures this. */
5478 /* Compute the size of the actual payload by subtracting out the
5479 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
5481 payload_size
-= strlen ("$,:#NN");
5483 /* The comma won't be used. */
5485 header_length
= strlen (header
);
5486 payload_size
-= header_length
;
5487 payload_size
-= hexnumlen (memaddr
);
5489 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
5491 strcat (rs
->buf
, header
);
5492 p
= rs
->buf
+ strlen (header
);
5494 /* Compute a best guess of the number of bytes actually transfered. */
5495 if (packet_format
== 'X')
5497 /* Best guess at number of bytes that will fit. */
5498 todo
= min (len
, payload_size
);
5500 payload_size
-= hexnumlen (todo
);
5501 todo
= min (todo
, payload_size
);
5505 /* Num bytes that will fit. */
5506 todo
= min (len
, payload_size
/ 2);
5508 payload_size
-= hexnumlen (todo
);
5509 todo
= min (todo
, payload_size
/ 2);
5513 internal_error (__FILE__
, __LINE__
,
5514 _("minumum packet size too small to write data"));
5516 /* If we already need another packet, then try to align the end
5517 of this packet to a useful boundary. */
5518 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
5519 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
5521 /* Append "<memaddr>". */
5522 memaddr
= remote_address_masked (memaddr
);
5523 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5530 /* Append <len>. Retain the location/size of <len>. It may need to
5531 be adjusted once the packet body has been created. */
5533 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
5541 /* Append the packet body. */
5542 if (packet_format
== 'X')
5544 /* Binary mode. Send target system values byte by byte, in
5545 increasing byte addresses. Only escape certain critical
5547 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
5550 /* If not all TODO bytes fit, then we'll need another packet. Make
5551 a second try to keep the end of the packet aligned. Don't do
5552 this if the packet is tiny. */
5553 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
5557 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
5559 if (new_nr_bytes
!= nr_bytes
)
5560 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
5565 p
+= payload_length
;
5566 if (use_length
&& nr_bytes
< todo
)
5568 /* Escape chars have filled up the buffer prematurely,
5569 and we have actually sent fewer bytes than planned.
5570 Fix-up the length field of the packet. Use the same
5571 number of characters as before. */
5572 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
5573 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
5578 /* Normal mode: Send target system values byte by byte, in
5579 increasing byte addresses. Each byte is encoded as a two hex
5581 nr_bytes
= bin2hex (myaddr
, p
, todo
);
5585 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5586 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5588 if (rs
->buf
[0] == 'E')
5590 /* There is no correspondance between what the remote protocol
5591 uses for errors and errno codes. We would like a cleaner way
5592 of representing errors (big enough to include errno codes,
5593 bfd_error codes, and others). But for now just return EIO. */
5598 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
5599 fewer bytes than we'd planned. */
5603 /* Write memory data directly to the remote machine.
5604 This does not inform the data cache; the data cache uses this.
5605 MEMADDR is the address in the remote memory space.
5606 MYADDR is the address of the buffer in our space.
5607 LEN is the number of bytes.
5609 Returns number of bytes transferred, or 0 (setting errno) for
5610 error. Only transfer a single packet. */
5613 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
5615 char *packet_format
= 0;
5617 /* Check whether the target supports binary download. */
5618 check_binary_download (memaddr
);
5620 switch (remote_protocol_packets
[PACKET_X
].support
)
5623 packet_format
= "X";
5625 case PACKET_DISABLE
:
5626 packet_format
= "M";
5628 case PACKET_SUPPORT_UNKNOWN
:
5629 internal_error (__FILE__
, __LINE__
,
5630 _("remote_write_bytes: bad internal state"));
5632 internal_error (__FILE__
, __LINE__
, _("bad switch"));
5635 return remote_write_bytes_aux (packet_format
,
5636 memaddr
, myaddr
, len
, packet_format
[0], 1);
5639 /* Read memory data directly from the remote machine.
5640 This does not use the data cache; the data cache uses this.
5641 MEMADDR is the address in the remote memory space.
5642 MYADDR is the address of the buffer in our space.
5643 LEN is the number of bytes.
5645 Returns number of bytes transferred, or 0 for error. */
5647 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
5648 remote targets) shouldn't attempt to read the entire buffer.
5649 Instead it should read a single packet worth of data and then
5650 return the byte size of that packet to the caller. The caller (its
5651 caller and its callers caller ;-) already contains code for
5652 handling partial reads. */
5655 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
5657 struct remote_state
*rs
= get_remote_state ();
5658 int max_buf_size
; /* Max size of packet output buffer. */
5664 max_buf_size
= get_memory_read_packet_size ();
5665 /* The packet buffer will be large enough for the payload;
5666 get_memory_packet_size ensures this. */
5675 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
5677 /* construct "m"<memaddr>","<len>" */
5678 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
5679 memaddr
= remote_address_masked (memaddr
);
5682 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5684 p
+= hexnumstr (p
, (ULONGEST
) todo
);
5688 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5690 if (rs
->buf
[0] == 'E'
5691 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
5692 && rs
->buf
[3] == '\0')
5694 /* There is no correspondance between what the remote
5695 protocol uses for errors and errno codes. We would like
5696 a cleaner way of representing errors (big enough to
5697 include errno codes, bfd_error codes, and others). But
5698 for now just return EIO. */
5703 /* Reply describes memory byte by byte,
5704 each byte encoded as two hex characters. */
5707 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
5709 /* Reply is short. This means that we were able to read
5710 only part of what we wanted to. */
5711 return i
+ (origlen
- len
);
5721 /* Remote notification handler. */
5724 handle_notification (char *buf
, size_t length
)
5726 if (strncmp (buf
, "Stop:", 5) == 0)
5728 if (pending_stop_reply
)
5729 /* We've already parsed the in-flight stop-reply, but the stub
5730 for some reason thought we didn't, possibly due to timeout
5731 on its side. Just ignore it. */
5735 struct cleanup
*old_chain
;
5736 struct stop_reply
*reply
= stop_reply_xmalloc ();
5737 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
5739 remote_parse_stop_reply (buf
+ 5, reply
);
5741 discard_cleanups (old_chain
);
5743 /* Be careful to only set it after parsing, since an error
5744 may be thrown then. */
5745 pending_stop_reply
= reply
;
5747 /* Notify the event loop there's a stop reply to acknowledge
5748 and that there may be more events to fetch. */
5749 mark_async_event_handler (remote_async_get_pending_events_token
);
5753 /* We ignore notifications we don't recognize, for compatibility
5754 with newer stubs. */
5759 /* Read or write LEN bytes from inferior memory at MEMADDR,
5760 transferring to or from debugger address BUFFER. Write to inferior
5761 if SHOULD_WRITE is nonzero. Returns length of data written or
5762 read; 0 for error. TARGET is unused. */
5765 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
5766 int should_write
, struct mem_attrib
*attrib
,
5767 struct target_ops
*target
)
5771 set_general_thread (inferior_ptid
);
5774 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
5776 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
5781 /* Sends a packet with content determined by the printf format string
5782 FORMAT and the remaining arguments, then gets the reply. Returns
5783 whether the packet was a success, a failure, or unknown. */
5785 static enum packet_result
5786 remote_send_printf (const char *format
, ...)
5788 struct remote_state
*rs
= get_remote_state ();
5789 int max_size
= get_remote_packet_size ();
5792 va_start (ap
, format
);
5795 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
5796 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
5798 if (putpkt (rs
->buf
) < 0)
5799 error (_("Communication problem with target."));
5802 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5804 return packet_check_result (rs
->buf
);
5808 restore_remote_timeout (void *p
)
5810 int value
= *(int *)p
;
5811 remote_timeout
= value
;
5814 /* Flash writing can take quite some time. We'll set
5815 effectively infinite timeout for flash operations.
5816 In future, we'll need to decide on a better approach. */
5817 static const int remote_flash_timeout
= 1000;
5820 remote_flash_erase (struct target_ops
*ops
,
5821 ULONGEST address
, LONGEST length
)
5823 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
5824 int saved_remote_timeout
= remote_timeout
;
5825 enum packet_result ret
;
5827 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5828 &saved_remote_timeout
);
5829 remote_timeout
= remote_flash_timeout
;
5831 ret
= remote_send_printf ("vFlashErase:%s,%s",
5832 phex (address
, addr_size
),
5836 case PACKET_UNKNOWN
:
5837 error (_("Remote target does not support flash erase"));
5839 error (_("Error erasing flash with vFlashErase packet"));
5844 do_cleanups (back_to
);
5848 remote_flash_write (struct target_ops
*ops
,
5849 ULONGEST address
, LONGEST length
,
5850 const gdb_byte
*data
)
5852 int saved_remote_timeout
= remote_timeout
;
5854 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5855 &saved_remote_timeout
);
5857 remote_timeout
= remote_flash_timeout
;
5858 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
5859 do_cleanups (back_to
);
5865 remote_flash_done (struct target_ops
*ops
)
5867 int saved_remote_timeout
= remote_timeout
;
5869 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5870 &saved_remote_timeout
);
5872 remote_timeout
= remote_flash_timeout
;
5873 ret
= remote_send_printf ("vFlashDone");
5874 do_cleanups (back_to
);
5878 case PACKET_UNKNOWN
:
5879 error (_("Remote target does not support vFlashDone"));
5881 error (_("Error finishing flash operation"));
5888 remote_files_info (struct target_ops
*ignore
)
5890 puts_filtered ("Debugging a target over a serial line.\n");
5893 /* Stuff for dealing with the packets which are part of this protocol.
5894 See comment at top of file for details. */
5896 /* Read a single character from the remote end. */
5899 readchar (int timeout
)
5903 ch
= serial_readchar (remote_desc
, timeout
);
5908 switch ((enum serial_rc
) ch
)
5912 error (_("Remote connection closed"));
5915 perror_with_name (_("Remote communication error"));
5917 case SERIAL_TIMEOUT
:
5923 /* Send the command in *BUF to the remote machine, and read the reply
5924 into *BUF. Report an error if we get an error reply. Resize
5925 *BUF using xrealloc if necessary to hold the result, and update
5929 remote_send (char **buf
,
5933 getpkt (buf
, sizeof_buf
, 0);
5935 if ((*buf
)[0] == 'E')
5936 error (_("Remote failure reply: %s"), *buf
);
5939 /* Return a pointer to an xmalloc'ed string representing an escaped
5940 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
5941 etc. The caller is responsible for releasing the returned
5945 escape_buffer (const char *buf
, int n
)
5947 struct cleanup
*old_chain
;
5948 struct ui_file
*stb
;
5952 stb
= mem_fileopen ();
5953 old_chain
= make_cleanup_ui_file_delete (stb
);
5955 fputstrn_unfiltered (buf
, n
, 0, stb
);
5956 str
= ui_file_xstrdup (stb
, &length
);
5957 do_cleanups (old_chain
);
5961 /* Display a null-terminated packet on stdout, for debugging, using C
5965 print_packet (char *buf
)
5967 puts_filtered ("\"");
5968 fputstr_filtered (buf
, '"', gdb_stdout
);
5969 puts_filtered ("\"");
5975 return putpkt_binary (buf
, strlen (buf
));
5978 /* Send a packet to the remote machine, with error checking. The data
5979 of the packet is in BUF. The string in BUF can be at most
5980 get_remote_packet_size () - 5 to account for the $, # and checksum,
5981 and for a possible /0 if we are debugging (remote_debug) and want
5982 to print the sent packet as a string. */
5985 putpkt_binary (char *buf
, int cnt
)
5987 struct remote_state
*rs
= get_remote_state ();
5989 unsigned char csum
= 0;
5990 char *buf2
= alloca (cnt
+ 6);
5996 /* Catch cases like trying to read memory or listing threads while
5997 we're waiting for a stop reply. The remote server wouldn't be
5998 ready to handle this request, so we'd hang and timeout. We don't
5999 have to worry about this in synchronous mode, because in that
6000 case it's not possible to issue a command while the target is
6001 running. This is not a problem in non-stop mode, because in that
6002 case, the stub is always ready to process serial input. */
6003 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
6004 error (_("Cannot execute this command while the target is running."));
6006 /* We're sending out a new packet. Make sure we don't look at a
6007 stale cached response. */
6008 rs
->cached_wait_status
= 0;
6010 /* Copy the packet into buffer BUF2, encapsulating it
6011 and giving it a checksum. */
6016 for (i
= 0; i
< cnt
; i
++)
6022 *p
++ = tohex ((csum
>> 4) & 0xf);
6023 *p
++ = tohex (csum
& 0xf);
6025 /* Send it over and over until we get a positive ack. */
6029 int started_error_output
= 0;
6033 struct cleanup
*old_chain
;
6037 str
= escape_buffer (buf2
, p
- buf2
);
6038 old_chain
= make_cleanup (xfree
, str
);
6039 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
6040 gdb_flush (gdb_stdlog
);
6041 do_cleanups (old_chain
);
6043 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6044 perror_with_name (_("putpkt: write failed"));
6046 /* If this is a no acks version of the remote protocol, send the
6047 packet and move on. */
6051 /* Read until either a timeout occurs (-2) or '+' is read.
6052 Handle any notification that arrives in the mean time. */
6055 ch
= readchar (remote_timeout
);
6063 case SERIAL_TIMEOUT
:
6066 if (started_error_output
)
6068 putchar_unfiltered ('\n');
6069 started_error_output
= 0;
6078 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6082 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6083 case SERIAL_TIMEOUT
:
6087 break; /* Retransmit buffer. */
6091 fprintf_unfiltered (gdb_stdlog
,
6092 "Packet instead of Ack, ignoring it\n");
6093 /* It's probably an old response sent because an ACK
6094 was lost. Gobble up the packet and ack it so it
6095 doesn't get retransmitted when we resend this
6098 serial_write (remote_desc
, "+", 1);
6099 continue; /* Now, go look for +. */
6106 /* If we got a notification, handle it, and go back to looking
6108 /* We've found the start of a notification. Now
6109 collect the data. */
6110 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6115 struct cleanup
*old_chain
;
6118 str
= escape_buffer (rs
->buf
, val
);
6119 old_chain
= make_cleanup (xfree
, str
);
6120 fprintf_unfiltered (gdb_stdlog
,
6121 " Notification received: %s\n",
6123 do_cleanups (old_chain
);
6125 handle_notification (rs
->buf
, val
);
6126 /* We're in sync now, rewait for the ack. */
6133 if (!started_error_output
)
6135 started_error_output
= 1;
6136 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6138 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6139 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6148 if (!started_error_output
)
6150 started_error_output
= 1;
6151 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6153 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6157 break; /* Here to retransmit. */
6161 /* This is wrong. If doing a long backtrace, the user should be
6162 able to get out next time we call QUIT, without anything as
6163 violent as interrupt_query. If we want to provide a way out of
6164 here without getting to the next QUIT, it should be based on
6165 hitting ^C twice as in remote_wait. */
6176 /* Come here after finding the start of a frame when we expected an
6177 ack. Do our best to discard the rest of this packet. */
6186 c
= readchar (remote_timeout
);
6189 case SERIAL_TIMEOUT
:
6190 /* Nothing we can do. */
6193 /* Discard the two bytes of checksum and stop. */
6194 c
= readchar (remote_timeout
);
6196 c
= readchar (remote_timeout
);
6199 case '*': /* Run length encoding. */
6200 /* Discard the repeat count. */
6201 c
= readchar (remote_timeout
);
6206 /* A regular character. */
6212 /* Come here after finding the start of the frame. Collect the rest
6213 into *BUF, verifying the checksum, length, and handling run-length
6214 compression. NUL terminate the buffer. If there is not enough room,
6215 expand *BUF using xrealloc.
6217 Returns -1 on error, number of characters in buffer (ignoring the
6218 trailing NULL) on success. (could be extended to return one of the
6219 SERIAL status indications). */
6222 read_frame (char **buf_p
,
6229 struct remote_state
*rs
= get_remote_state ();
6236 c
= readchar (remote_timeout
);
6239 case SERIAL_TIMEOUT
:
6241 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
6245 fputs_filtered ("Saw new packet start in middle of old one\n",
6247 return -1; /* Start a new packet, count retries. */
6250 unsigned char pktcsum
;
6256 check_0
= readchar (remote_timeout
);
6258 check_1
= readchar (remote_timeout
);
6260 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
6263 fputs_filtered ("Timeout in checksum, retrying\n",
6267 else if (check_0
< 0 || check_1
< 0)
6270 fputs_filtered ("Communication error in checksum\n",
6275 /* Don't recompute the checksum; with no ack packets we
6276 don't have any way to indicate a packet retransmission
6281 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
6282 if (csum
== pktcsum
)
6287 struct cleanup
*old_chain
;
6290 str
= escape_buffer (buf
, bc
);
6291 old_chain
= make_cleanup (xfree
, str
);
6292 fprintf_unfiltered (gdb_stdlog
,
6294 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6295 pktcsum
, csum
, str
);
6296 do_cleanups (old_chain
);
6298 /* Number of characters in buffer ignoring trailing
6302 case '*': /* Run length encoding. */
6307 c
= readchar (remote_timeout
);
6309 repeat
= c
- ' ' + 3; /* Compute repeat count. */
6311 /* The character before ``*'' is repeated. */
6313 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
6315 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
6317 /* Make some more room in the buffer. */
6318 *sizeof_buf
+= repeat
;
6319 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6323 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
6329 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
6333 if (bc
>= *sizeof_buf
- 1)
6335 /* Make some more room in the buffer. */
6337 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6348 /* Read a packet from the remote machine, with error checking, and
6349 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6350 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6351 rather than timing out; this is used (in synchronous mode) to wait
6352 for a target that is is executing user code to stop. */
6353 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6354 don't have to change all the calls to getpkt to deal with the
6355 return value, because at the moment I don't know what the right
6356 thing to do it for those. */
6364 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
6368 /* Read a packet from the remote machine, with error checking, and
6369 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6370 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6371 rather than timing out; this is used (in synchronous mode) to wait
6372 for a target that is is executing user code to stop. If FOREVER ==
6373 0, this function is allowed to time out gracefully and return an
6374 indication of this to the caller. Otherwise return the number of
6375 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6376 enough reason to return to the caller. */
6379 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
6380 int expecting_notif
)
6382 struct remote_state
*rs
= get_remote_state ();
6388 /* We're reading a new response. Make sure we don't look at a
6389 previously cached response. */
6390 rs
->cached_wait_status
= 0;
6392 strcpy (*buf
, "timeout");
6395 timeout
= watchdog
> 0 ? watchdog
: -1;
6396 else if (expecting_notif
)
6397 timeout
= 0; /* There should already be a char in the buffer. If
6400 timeout
= remote_timeout
;
6404 /* Process any number of notifications, and then return when
6408 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
6410 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
6412 /* This can loop forever if the remote side sends us
6413 characters continuously, but if it pauses, we'll get
6414 SERIAL_TIMEOUT from readchar because of timeout. Then
6415 we'll count that as a retry.
6417 Note that even when forever is set, we will only wait
6418 forever prior to the start of a packet. After that, we
6419 expect characters to arrive at a brisk pace. They should
6420 show up within remote_timeout intervals. */
6422 c
= readchar (timeout
);
6423 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
6425 if (c
== SERIAL_TIMEOUT
)
6427 if (expecting_notif
)
6428 return -1; /* Don't complain, it's normal to not get
6429 anything in this case. */
6431 if (forever
) /* Watchdog went off? Kill the target. */
6435 error (_("Watchdog timeout has expired. Target detached."));
6438 fputs_filtered ("Timed out.\n", gdb_stdlog
);
6442 /* We've found the start of a packet or notification.
6443 Now collect the data. */
6444 val
= read_frame (buf
, sizeof_buf
);
6449 serial_write (remote_desc
, "-", 1);
6452 if (tries
> MAX_TRIES
)
6454 /* We have tried hard enough, and just can't receive the
6455 packet/notification. Give up. */
6456 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
6458 /* Skip the ack char if we're in no-ack mode. */
6459 if (!rs
->noack_mode
)
6460 serial_write (remote_desc
, "+", 1);
6464 /* If we got an ordinary packet, return that to our caller. */
6469 struct cleanup
*old_chain
;
6472 str
= escape_buffer (*buf
, val
);
6473 old_chain
= make_cleanup (xfree
, str
);
6474 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
6475 do_cleanups (old_chain
);
6478 /* Skip the ack char if we're in no-ack mode. */
6479 if (!rs
->noack_mode
)
6480 serial_write (remote_desc
, "+", 1);
6484 /* If we got a notification, handle it, and go back to looking
6488 gdb_assert (c
== '%');
6492 struct cleanup
*old_chain
;
6495 str
= escape_buffer (*buf
, val
);
6496 old_chain
= make_cleanup (xfree
, str
);
6497 fprintf_unfiltered (gdb_stdlog
,
6498 " Notification received: %s\n",
6500 do_cleanups (old_chain
);
6503 handle_notification (*buf
, val
);
6505 /* Notifications require no acknowledgement. */
6507 if (expecting_notif
)
6514 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
6516 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
6520 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
6522 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
6527 remote_kill (struct target_ops
*ops
)
6529 /* Use catch_errors so the user can quit from gdb even when we
6530 aren't on speaking terms with the remote system. */
6531 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
6533 /* Don't wait for it to die. I'm not really sure it matters whether
6534 we do or not. For the existing stubs, kill is a noop. */
6535 target_mourn_inferior ();
6539 remote_vkill (int pid
, struct remote_state
*rs
)
6541 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6544 /* Tell the remote target to detach. */
6545 sprintf (rs
->buf
, "vKill;%x", pid
);
6547 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6549 if (packet_ok (rs
->buf
,
6550 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
6552 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6559 extended_remote_kill (struct target_ops
*ops
)
6562 int pid
= ptid_get_pid (inferior_ptid
);
6563 struct remote_state
*rs
= get_remote_state ();
6565 res
= remote_vkill (pid
, rs
);
6566 if (res
== -1 && !remote_multi_process_p (rs
))
6568 /* Don't try 'k' on a multi-process aware stub -- it has no way
6569 to specify the pid. */
6573 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6574 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
6577 /* Don't wait for it to die. I'm not really sure it matters whether
6578 we do or not. For the existing stubs, kill is a noop. */
6584 error (_("Can't kill process"));
6586 target_mourn_inferior ();
6590 remote_mourn (struct target_ops
*ops
)
6592 remote_mourn_1 (ops
);
6595 /* Worker function for remote_mourn. */
6597 remote_mourn_1 (struct target_ops
*target
)
6599 unpush_target (target
);
6601 /* remote_close takes care of doing most of the clean up. */
6602 generic_mourn_inferior ();
6606 extended_remote_mourn_1 (struct target_ops
*target
)
6608 struct remote_state
*rs
= get_remote_state ();
6610 /* In case we got here due to an error, but we're going to stay
6612 rs
->waiting_for_stop_reply
= 0;
6614 /* We're no longer interested in these events. */
6615 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
6617 /* If the current general thread belonged to the process we just
6618 detached from or has exited, the remote side current general
6619 thread becomes undefined. Considering a case like this:
6621 - We just got here due to a detach.
6622 - The process that we're detaching from happens to immediately
6623 report a global breakpoint being hit in non-stop mode, in the
6624 same thread we had selected before.
6625 - GDB attaches to this process again.
6626 - This event happens to be the next event we handle.
6628 GDB would consider that the current general thread didn't need to
6629 be set on the stub side (with Hg), since for all it knew,
6630 GENERAL_THREAD hadn't changed.
6632 Notice that although in all-stop mode, the remote server always
6633 sets the current thread to the thread reporting the stop event,
6634 that doesn't happen in non-stop mode; in non-stop, the stub *must
6635 not* change the current thread when reporting a breakpoint hit,
6636 due to the decoupling of event reporting and event handling.
6638 To keep things simple, we always invalidate our notion of the
6640 record_currthread (minus_one_ptid
);
6642 /* Unlike "target remote", we do not want to unpush the target; then
6643 the next time the user says "run", we won't be connected. */
6645 /* Call common code to mark the inferior as not running. */
6646 generic_mourn_inferior ();
6648 if (!have_inferiors ())
6650 if (!remote_multi_process_p (rs
))
6652 /* Check whether the target is running now - some remote stubs
6653 automatically restart after kill. */
6655 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6657 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
6659 /* Assume that the target has been restarted. Set inferior_ptid
6660 so that bits of core GDB realizes there's something here, e.g.,
6661 so that the user can say "kill" again. */
6662 inferior_ptid
= magic_null_ptid
;
6669 extended_remote_mourn (struct target_ops
*ops
)
6671 extended_remote_mourn_1 (ops
);
6675 extended_remote_run (char *args
)
6677 struct remote_state
*rs
= get_remote_state ();
6681 /* If the user has disabled vRun support, or we have detected that
6682 support is not available, do not try it. */
6683 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6686 strcpy (rs
->buf
, "vRun;");
6687 len
= strlen (rs
->buf
);
6689 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
6690 error (_("Remote file name too long for run packet"));
6691 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
6693 gdb_assert (args
!= NULL
);
6696 struct cleanup
*back_to
;
6700 argv
= gdb_buildargv (args
);
6701 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
6702 for (i
= 0; argv
[i
] != NULL
; i
++)
6704 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
6705 error (_("Argument list too long for run packet"));
6706 rs
->buf
[len
++] = ';';
6707 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
6709 do_cleanups (back_to
);
6712 rs
->buf
[len
++] = '\0';
6715 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6717 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
6719 /* We have a wait response; we don't need it, though. All is well. */
6722 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6723 /* It wasn't disabled before, but it is now. */
6727 if (remote_exec_file
[0] == '\0')
6728 error (_("Running the default executable on the remote target failed; "
6729 "try \"set remote exec-file\"?"));
6731 error (_("Running \"%s\" on the remote target failed"),
6736 /* In the extended protocol we want to be able to do things like
6737 "run" and have them basically work as expected. So we need
6738 a special create_inferior function. We support changing the
6739 executable file and the command line arguments, but not the
6743 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
6744 char **env
, int from_tty
)
6746 /* If running asynchronously, register the target file descriptor
6747 with the event loop. */
6748 if (target_can_async_p ())
6749 target_async (inferior_event_handler
, 0);
6751 /* Now restart the remote server. */
6752 if (extended_remote_run (args
) == -1)
6754 /* vRun was not supported. Fail if we need it to do what the
6756 if (remote_exec_file
[0])
6757 error (_("Remote target does not support \"set remote exec-file\""));
6759 error (_("Remote target does not support \"set args\" or run <ARGS>"));
6761 /* Fall back to "R". */
6762 extended_remote_restart ();
6765 /* Clean up from the last time we ran, before we mark the target
6766 running again. This will mark breakpoints uninserted, and
6767 get_offsets may insert breakpoints. */
6768 init_thread_list ();
6769 init_wait_for_inferior ();
6771 /* Now mark the inferior as running before we do anything else. */
6772 inferior_ptid
= magic_null_ptid
;
6774 /* Now, if we have thread information, update inferior_ptid. */
6775 inferior_ptid
= remote_current_thread (inferior_ptid
);
6777 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
6778 add_thread_silent (inferior_ptid
);
6780 /* Get updated offsets, if the stub uses qOffsets. */
6785 extended_remote_create_inferior (struct target_ops
*ops
,
6786 char *exec_file
, char *args
,
6787 char **env
, int from_tty
)
6789 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
6793 /* Insert a breakpoint. On targets that have software breakpoint
6794 support, we ask the remote target to do the work; on targets
6795 which don't, we insert a traditional memory breakpoint. */
6798 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
6799 struct bp_target_info
*bp_tgt
)
6801 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
6802 If it succeeds, then set the support to PACKET_ENABLE. If it
6803 fails, and the user has explicitly requested the Z support then
6804 report an error, otherwise, mark it disabled and go on. */
6806 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6808 CORE_ADDR addr
= bp_tgt
->placed_address
;
6809 struct remote_state
*rs
;
6813 gdbarch_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
6815 rs
= get_remote_state ();
6821 addr
= (ULONGEST
) remote_address_masked (addr
);
6822 p
+= hexnumstr (p
, addr
);
6823 sprintf (p
, ",%d", bpsize
);
6826 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6828 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
6833 bp_tgt
->placed_address
= addr
;
6834 bp_tgt
->placed_size
= bpsize
;
6836 case PACKET_UNKNOWN
:
6841 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
6845 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
6846 struct bp_target_info
*bp_tgt
)
6848 CORE_ADDR addr
= bp_tgt
->placed_address
;
6849 struct remote_state
*rs
= get_remote_state ();
6852 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6860 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
6861 p
+= hexnumstr (p
, addr
);
6862 sprintf (p
, ",%d", bp_tgt
->placed_size
);
6865 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6867 return (rs
->buf
[0] == 'E');
6870 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
6874 watchpoint_to_Z_packet (int type
)
6879 return Z_PACKET_WRITE_WP
;
6882 return Z_PACKET_READ_WP
;
6885 return Z_PACKET_ACCESS_WP
;
6888 internal_error (__FILE__
, __LINE__
,
6889 _("hw_bp_to_z: bad watchpoint type %d"), type
);
6894 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
6896 struct remote_state
*rs
= get_remote_state ();
6898 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6900 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6903 sprintf (rs
->buf
, "Z%x,", packet
);
6904 p
= strchr (rs
->buf
, '\0');
6905 addr
= remote_address_masked (addr
);
6906 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6907 sprintf (p
, ",%x", len
);
6910 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6912 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6915 case PACKET_UNKNOWN
:
6920 internal_error (__FILE__
, __LINE__
,
6921 _("remote_insert_watchpoint: reached end of function"));
6926 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
6928 struct remote_state
*rs
= get_remote_state ();
6930 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6932 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6935 sprintf (rs
->buf
, "z%x,", packet
);
6936 p
= strchr (rs
->buf
, '\0');
6937 addr
= remote_address_masked (addr
);
6938 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6939 sprintf (p
, ",%x", len
);
6941 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6943 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6946 case PACKET_UNKNOWN
:
6951 internal_error (__FILE__
, __LINE__
,
6952 _("remote_remove_watchpoint: reached end of function"));
6956 int remote_hw_watchpoint_limit
= -1;
6957 int remote_hw_breakpoint_limit
= -1;
6960 remote_check_watch_resources (int type
, int cnt
, int ot
)
6962 if (type
== bp_hardware_breakpoint
)
6964 if (remote_hw_breakpoint_limit
== 0)
6966 else if (remote_hw_breakpoint_limit
< 0)
6968 else if (cnt
<= remote_hw_breakpoint_limit
)
6973 if (remote_hw_watchpoint_limit
== 0)
6975 else if (remote_hw_watchpoint_limit
< 0)
6979 else if (cnt
<= remote_hw_watchpoint_limit
)
6986 remote_stopped_by_watchpoint (void)
6988 return remote_stopped_by_watchpoint_p
;
6992 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
6995 if (remote_stopped_by_watchpoint ())
6997 *addr_p
= remote_watch_data_address
;
7006 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7007 struct bp_target_info
*bp_tgt
)
7010 struct remote_state
*rs
;
7013 /* The length field should be set to the size of a breakpoint
7014 instruction, even though we aren't inserting one ourselves. */
7016 gdbarch_breakpoint_from_pc
7017 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7019 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7022 rs
= get_remote_state ();
7029 addr
= remote_address_masked (bp_tgt
->placed_address
);
7030 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7031 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7034 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7036 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7039 case PACKET_UNKNOWN
:
7044 internal_error (__FILE__
, __LINE__
,
7045 _("remote_insert_hw_breakpoint: reached end of function"));
7050 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7051 struct bp_target_info
*bp_tgt
)
7054 struct remote_state
*rs
= get_remote_state ();
7057 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7064 addr
= remote_address_masked (bp_tgt
->placed_address
);
7065 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7066 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7069 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7071 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7074 case PACKET_UNKNOWN
:
7079 internal_error (__FILE__
, __LINE__
,
7080 _("remote_remove_hw_breakpoint: reached end of function"));
7083 /* Table used by the crc32 function to calcuate the checksum. */
7085 static unsigned long crc32_table
[256] =
7088 static unsigned long
7089 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
7091 if (!crc32_table
[1])
7093 /* Initialize the CRC table and the decoding table. */
7097 for (i
= 0; i
< 256; i
++)
7099 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7100 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7107 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7113 /* compare-sections command
7115 With no arguments, compares each loadable section in the exec bfd
7116 with the same memory range on the target, and reports mismatches.
7117 Useful for verifying the image on the target against the exec file.
7118 Depends on the target understanding the new "qCRC:" request. */
7120 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7121 target method (target verify memory) and generic version of the
7122 actual command. This will allow other high-level code (especially
7123 generic_load()) to make use of this target functionality. */
7126 compare_sections_command (char *args
, int from_tty
)
7128 struct remote_state
*rs
= get_remote_state ();
7130 unsigned long host_crc
, target_crc
;
7131 struct cleanup
*old_chain
;
7134 const char *sectname
;
7141 error (_("command cannot be used without an exec file"));
7142 if (!current_target
.to_shortname
||
7143 strcmp (current_target
.to_shortname
, "remote") != 0)
7144 error (_("command can only be used with remote target"));
7146 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7148 if (!(s
->flags
& SEC_LOAD
))
7149 continue; /* skip non-loadable section */
7151 size
= bfd_get_section_size (s
);
7153 continue; /* skip zero-length section */
7155 sectname
= bfd_get_section_name (exec_bfd
, s
);
7156 if (args
&& strcmp (args
, sectname
) != 0)
7157 continue; /* not the section selected by user */
7159 matched
= 1; /* do this section */
7161 /* FIXME: assumes lma can fit into long. */
7162 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7163 (long) lma
, (long) size
);
7166 /* Be clever; compute the host_crc before waiting for target
7168 sectdata
= xmalloc (size
);
7169 old_chain
= make_cleanup (xfree
, sectdata
);
7170 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7171 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
7173 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7174 if (rs
->buf
[0] == 'E')
7175 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
7176 paddress (target_gdbarch
, lma
),
7177 paddress (target_gdbarch
, lma
+ size
));
7178 if (rs
->buf
[0] != 'C')
7179 error (_("remote target does not support this operation"));
7181 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7182 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7184 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
7185 paddress (target_gdbarch
, lma
),
7186 paddress (target_gdbarch
, lma
+ size
));
7187 if (host_crc
== target_crc
)
7188 printf_filtered ("matched.\n");
7191 printf_filtered ("MIS-MATCHED!\n");
7195 do_cleanups (old_chain
);
7198 warning (_("One or more sections of the remote executable does not match\n\
7199 the loaded file\n"));
7200 if (args
&& !matched
)
7201 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7204 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7205 into remote target. The number of bytes written to the remote
7206 target is returned, or -1 for error. */
7209 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7210 const char *annex
, const gdb_byte
*writebuf
,
7211 ULONGEST offset
, LONGEST len
,
7212 struct packet_config
*packet
)
7217 struct remote_state
*rs
= get_remote_state ();
7218 int max_size
= get_memory_write_packet_size ();
7220 if (packet
->support
== PACKET_DISABLE
)
7223 /* Insert header. */
7224 i
= snprintf (rs
->buf
, max_size
,
7225 "qXfer:%s:write:%s:%s:",
7226 object_name
, annex
? annex
: "",
7227 phex_nz (offset
, sizeof offset
));
7228 max_size
-= (i
+ 1);
7230 /* Escape as much data as fits into rs->buf. */
7231 buf_len
= remote_escape_output
7232 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
7234 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
7235 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7236 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7239 unpack_varlen_hex (rs
->buf
, &n
);
7243 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7244 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7245 number of bytes read is returned, or 0 for EOF, or -1 for error.
7246 The number of bytes read may be less than LEN without indicating an
7247 EOF. PACKET is checked and updated to indicate whether the remote
7248 target supports this object. */
7251 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
7253 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
7254 struct packet_config
*packet
)
7256 static char *finished_object
;
7257 static char *finished_annex
;
7258 static ULONGEST finished_offset
;
7260 struct remote_state
*rs
= get_remote_state ();
7261 unsigned int total
= 0;
7262 LONGEST i
, n
, packet_len
;
7264 if (packet
->support
== PACKET_DISABLE
)
7267 /* Check whether we've cached an end-of-object packet that matches
7269 if (finished_object
)
7271 if (strcmp (object_name
, finished_object
) == 0
7272 && strcmp (annex
? annex
: "", finished_annex
) == 0
7273 && offset
== finished_offset
)
7276 /* Otherwise, we're now reading something different. Discard
7278 xfree (finished_object
);
7279 xfree (finished_annex
);
7280 finished_object
= NULL
;
7281 finished_annex
= NULL
;
7284 /* Request only enough to fit in a single packet. The actual data
7285 may not, since we don't know how much of it will need to be escaped;
7286 the target is free to respond with slightly less data. We subtract
7287 five to account for the response type and the protocol frame. */
7288 n
= min (get_remote_packet_size () - 5, len
);
7289 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7290 object_name
, annex
? annex
: "",
7291 phex_nz (offset
, sizeof offset
),
7292 phex_nz (n
, sizeof n
));
7293 i
= putpkt (rs
->buf
);
7298 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
7299 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7302 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
7303 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
7305 /* 'm' means there is (or at least might be) more data after this
7306 batch. That does not make sense unless there's at least one byte
7307 of data in this reply. */
7308 if (rs
->buf
[0] == 'm' && packet_len
== 1)
7309 error (_("Remote qXfer reply contained no data."));
7311 /* Got some data. */
7312 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
7314 /* 'l' is an EOF marker, possibly including a final block of data,
7315 or possibly empty. If we have the final block of a non-empty
7316 object, record this fact to bypass a subsequent partial read. */
7317 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
7319 finished_object
= xstrdup (object_name
);
7320 finished_annex
= xstrdup (annex
? annex
: "");
7321 finished_offset
= offset
+ i
;
7328 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
7329 const char *annex
, gdb_byte
*readbuf
,
7330 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
7332 struct remote_state
*rs
;
7337 set_general_thread (inferior_ptid
);
7339 rs
= get_remote_state ();
7341 /* Handle memory using the standard memory routines. */
7342 if (object
== TARGET_OBJECT_MEMORY
)
7347 /* If the remote target is connected but not running, we should
7348 pass this request down to a lower stratum (e.g. the executable
7350 if (!target_has_execution
)
7353 if (writebuf
!= NULL
)
7354 xfered
= remote_write_bytes (offset
, writebuf
, len
);
7356 xfered
= remote_read_bytes (offset
, readbuf
, len
);
7360 else if (xfered
== 0 && errno
== 0)
7366 /* Handle SPU memory using qxfer packets. */
7367 if (object
== TARGET_OBJECT_SPU
)
7370 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
7371 &remote_protocol_packets
7372 [PACKET_qXfer_spu_read
]);
7374 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
7375 &remote_protocol_packets
7376 [PACKET_qXfer_spu_write
]);
7379 /* Handle extra signal info using qxfer packets. */
7380 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
7383 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
7384 &remote_protocol_packets
7385 [PACKET_qXfer_siginfo_read
]);
7387 return remote_write_qxfer (ops
, "siginfo", annex
, writebuf
, offset
, len
,
7388 &remote_protocol_packets
7389 [PACKET_qXfer_siginfo_write
]);
7392 /* Only handle flash writes. */
7393 if (writebuf
!= NULL
)
7399 case TARGET_OBJECT_FLASH
:
7400 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
7404 else if (xfered
== 0 && errno
== 0)
7414 /* Map pre-existing objects onto letters. DO NOT do this for new
7415 objects!!! Instead specify new query packets. */
7418 case TARGET_OBJECT_AVR
:
7422 case TARGET_OBJECT_AUXV
:
7423 gdb_assert (annex
== NULL
);
7424 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
7425 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
7427 case TARGET_OBJECT_AVAILABLE_FEATURES
:
7428 return remote_read_qxfer
7429 (ops
, "features", annex
, readbuf
, offset
, len
,
7430 &remote_protocol_packets
[PACKET_qXfer_features
]);
7432 case TARGET_OBJECT_LIBRARIES
:
7433 return remote_read_qxfer
7434 (ops
, "libraries", annex
, readbuf
, offset
, len
,
7435 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
7437 case TARGET_OBJECT_MEMORY_MAP
:
7438 gdb_assert (annex
== NULL
);
7439 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
7440 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
7442 case TARGET_OBJECT_OSDATA
:
7443 /* Should only get here if we're connected. */
7444 gdb_assert (remote_desc
);
7445 return remote_read_qxfer
7446 (ops
, "osdata", annex
, readbuf
, offset
, len
,
7447 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
7453 /* Note: a zero OFFSET and LEN can be used to query the minimum
7455 if (offset
== 0 && len
== 0)
7456 return (get_remote_packet_size ());
7457 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7458 large enough let the caller deal with it. */
7459 if (len
< get_remote_packet_size ())
7461 len
= get_remote_packet_size ();
7463 /* Except for querying the minimum buffer size, target must be open. */
7465 error (_("remote query is only available after target open"));
7467 gdb_assert (annex
!= NULL
);
7468 gdb_assert (readbuf
!= NULL
);
7474 /* We used one buffer char for the remote protocol q command and
7475 another for the query type. As the remote protocol encapsulation
7476 uses 4 chars plus one extra in case we are debugging
7477 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7480 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
7482 /* Bad caller may have sent forbidden characters. */
7483 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
7488 gdb_assert (annex
[i
] == '\0');
7490 i
= putpkt (rs
->buf
);
7494 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7495 strcpy ((char *) readbuf
, rs
->buf
);
7497 return strlen ((char *) readbuf
);
7501 remote_search_memory (struct target_ops
* ops
,
7502 CORE_ADDR start_addr
, ULONGEST search_space_len
,
7503 const gdb_byte
*pattern
, ULONGEST pattern_len
,
7504 CORE_ADDR
*found_addrp
)
7506 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
7507 struct remote_state
*rs
= get_remote_state ();
7508 int max_size
= get_memory_write_packet_size ();
7509 struct packet_config
*packet
=
7510 &remote_protocol_packets
[PACKET_qSearch_memory
];
7511 /* number of packet bytes used to encode the pattern,
7512 this could be more than PATTERN_LEN due to escape characters */
7513 int escaped_pattern_len
;
7514 /* amount of pattern that was encodable in the packet */
7515 int used_pattern_len
;
7518 ULONGEST found_addr
;
7520 /* Don't go to the target if we don't have to.
7521 This is done before checking packet->support to avoid the possibility that
7522 a success for this edge case means the facility works in general. */
7523 if (pattern_len
> search_space_len
)
7525 if (pattern_len
== 0)
7527 *found_addrp
= start_addr
;
7531 /* If we already know the packet isn't supported, fall back to the simple
7532 way of searching memory. */
7534 if (packet
->support
== PACKET_DISABLE
)
7536 /* Target doesn't provided special support, fall back and use the
7537 standard support (copy memory and do the search here). */
7538 return simple_search_memory (ops
, start_addr
, search_space_len
,
7539 pattern
, pattern_len
, found_addrp
);
7542 /* Insert header. */
7543 i
= snprintf (rs
->buf
, max_size
,
7544 "qSearch:memory:%s;%s;",
7545 phex_nz (start_addr
, addr_size
),
7546 phex_nz (search_space_len
, sizeof (search_space_len
)));
7547 max_size
-= (i
+ 1);
7549 /* Escape as much data as fits into rs->buf. */
7550 escaped_pattern_len
=
7551 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
7552 &used_pattern_len
, max_size
);
7554 /* Bail if the pattern is too large. */
7555 if (used_pattern_len
!= pattern_len
)
7556 error ("Pattern is too large to transmit to remote target.");
7558 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
7559 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7560 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7562 /* The request may not have worked because the command is not
7563 supported. If so, fall back to the simple way. */
7564 if (packet
->support
== PACKET_DISABLE
)
7566 return simple_search_memory (ops
, start_addr
, search_space_len
,
7567 pattern
, pattern_len
, found_addrp
);
7572 if (rs
->buf
[0] == '0')
7574 else if (rs
->buf
[0] == '1')
7577 if (rs
->buf
[1] != ',')
7578 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7579 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
7580 *found_addrp
= found_addr
;
7583 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7589 remote_rcmd (char *command
,
7590 struct ui_file
*outbuf
)
7592 struct remote_state
*rs
= get_remote_state ();
7596 error (_("remote rcmd is only available after target open"));
7598 /* Send a NULL command across as an empty command. */
7599 if (command
== NULL
)
7602 /* The query prefix. */
7603 strcpy (rs
->buf
, "qRcmd,");
7604 p
= strchr (rs
->buf
, '\0');
7606 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
7607 error (_("\"monitor\" command ``%s'' is too long."), command
);
7609 /* Encode the actual command. */
7610 bin2hex ((gdb_byte
*) command
, p
, 0);
7612 if (putpkt (rs
->buf
) < 0)
7613 error (_("Communication problem with target."));
7615 /* get/display the response */
7620 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
7622 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7625 error (_("Target does not support this command."));
7626 if (buf
[0] == 'O' && buf
[1] != 'K')
7628 remote_console_output (buf
+ 1); /* 'O' message from stub. */
7631 if (strcmp (buf
, "OK") == 0)
7633 if (strlen (buf
) == 3 && buf
[0] == 'E'
7634 && isdigit (buf
[1]) && isdigit (buf
[2]))
7636 error (_("Protocol error with Rcmd"));
7638 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
7640 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
7641 fputc_unfiltered (c
, outbuf
);
7647 static VEC(mem_region_s
) *
7648 remote_memory_map (struct target_ops
*ops
)
7650 VEC(mem_region_s
) *result
= NULL
;
7651 char *text
= target_read_stralloc (¤t_target
,
7652 TARGET_OBJECT_MEMORY_MAP
, NULL
);
7656 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
7657 result
= parse_memory_map (text
);
7658 do_cleanups (back_to
);
7665 packet_command (char *args
, int from_tty
)
7667 struct remote_state
*rs
= get_remote_state ();
7670 error (_("command can only be used with remote target"));
7673 error (_("remote-packet command requires packet text as argument"));
7675 puts_filtered ("sending: ");
7676 print_packet (args
);
7677 puts_filtered ("\n");
7680 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7681 puts_filtered ("received: ");
7682 print_packet (rs
->buf
);
7683 puts_filtered ("\n");
7687 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
7689 static void display_thread_info (struct gdb_ext_thread_info
*info
);
7691 static void threadset_test_cmd (char *cmd
, int tty
);
7693 static void threadalive_test (char *cmd
, int tty
);
7695 static void threadlist_test_cmd (char *cmd
, int tty
);
7697 int get_and_display_threadinfo (threadref
*ref
);
7699 static void threadinfo_test_cmd (char *cmd
, int tty
);
7701 static int thread_display_step (threadref
*ref
, void *context
);
7703 static void threadlist_update_test_cmd (char *cmd
, int tty
);
7705 static void init_remote_threadtests (void);
7707 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
7710 threadset_test_cmd (char *cmd
, int tty
)
7712 int sample_thread
= SAMPLE_THREAD
;
7714 printf_filtered (_("Remote threadset test\n"));
7715 set_general_thread (sample_thread
);
7720 threadalive_test (char *cmd
, int tty
)
7722 int sample_thread
= SAMPLE_THREAD
;
7723 int pid
= ptid_get_pid (inferior_ptid
);
7724 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
7726 if (remote_thread_alive (ptid
))
7727 printf_filtered ("PASS: Thread alive test\n");
7729 printf_filtered ("FAIL: Thread alive test\n");
7732 void output_threadid (char *title
, threadref
*ref
);
7735 output_threadid (char *title
, threadref
*ref
)
7739 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
7741 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
7745 threadlist_test_cmd (char *cmd
, int tty
)
7748 threadref nextthread
;
7749 int done
, result_count
;
7750 threadref threadlist
[3];
7752 printf_filtered ("Remote Threadlist test\n");
7753 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
7754 &result_count
, &threadlist
[0]))
7755 printf_filtered ("FAIL: threadlist test\n");
7758 threadref
*scan
= threadlist
;
7759 threadref
*limit
= scan
+ result_count
;
7761 while (scan
< limit
)
7762 output_threadid (" thread ", scan
++);
7767 display_thread_info (struct gdb_ext_thread_info
*info
)
7769 output_threadid ("Threadid: ", &info
->threadid
);
7770 printf_filtered ("Name: %s\n ", info
->shortname
);
7771 printf_filtered ("State: %s\n", info
->display
);
7772 printf_filtered ("other: %s\n\n", info
->more_display
);
7776 get_and_display_threadinfo (threadref
*ref
)
7780 struct gdb_ext_thread_info threadinfo
;
7782 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
7783 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
7784 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
7785 display_thread_info (&threadinfo
);
7790 threadinfo_test_cmd (char *cmd
, int tty
)
7792 int athread
= SAMPLE_THREAD
;
7796 int_to_threadref (&thread
, athread
);
7797 printf_filtered ("Remote Threadinfo test\n");
7798 if (!get_and_display_threadinfo (&thread
))
7799 printf_filtered ("FAIL cannot get thread info\n");
7803 thread_display_step (threadref
*ref
, void *context
)
7805 /* output_threadid(" threadstep ",ref); *//* simple test */
7806 return get_and_display_threadinfo (ref
);
7810 threadlist_update_test_cmd (char *cmd
, int tty
)
7812 printf_filtered ("Remote Threadlist update test\n");
7813 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
7817 init_remote_threadtests (void)
7819 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
7820 Fetch and print the remote list of thread identifiers, one pkt only"));
7821 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
7822 _("Fetch and display info about one thread"));
7823 add_com ("tset", class_obscure
, threadset_test_cmd
,
7824 _("Test setting to a different thread"));
7825 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
7826 _("Iterate through updating all remote thread info"));
7827 add_com ("talive", class_obscure
, threadalive_test
,
7828 _(" Remote thread alive test "));
7833 /* Convert a thread ID to a string. Returns the string in a static
7837 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
7839 static char buf
[64];
7840 struct remote_state
*rs
= get_remote_state ();
7842 if (ptid_equal (magic_null_ptid
, ptid
))
7844 xsnprintf (buf
, sizeof buf
, "Thread <main>");
7847 else if (remote_multi_process_p (rs
)
7848 && ptid_get_tid (ptid
) != 0 && ptid_get_pid (ptid
) != 0)
7850 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
7851 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
7854 else if (ptid_get_tid (ptid
) != 0)
7856 xsnprintf (buf
, sizeof buf
, "Thread %ld",
7857 ptid_get_tid (ptid
));
7861 return normal_pid_to_str (ptid
);
7864 /* Get the address of the thread local variable in OBJFILE which is
7865 stored at OFFSET within the thread local storage for thread PTID. */
7868 remote_get_thread_local_address (struct target_ops
*ops
,
7869 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
7871 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
7873 struct remote_state
*rs
= get_remote_state ();
7875 char *endp
= rs
->buf
+ get_remote_packet_size ();
7876 enum packet_result result
;
7878 strcpy (p
, "qGetTLSAddr:");
7880 p
= write_ptid (p
, endp
, ptid
);
7882 p
+= hexnumstr (p
, offset
);
7884 p
+= hexnumstr (p
, lm
);
7888 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7889 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
7890 if (result
== PACKET_OK
)
7894 unpack_varlen_hex (rs
->buf
, &result
);
7897 else if (result
== PACKET_UNKNOWN
)
7898 throw_error (TLS_GENERIC_ERROR
,
7899 _("Remote target doesn't support qGetTLSAddr packet"));
7901 throw_error (TLS_GENERIC_ERROR
,
7902 _("Remote target failed to process qGetTLSAddr request"));
7905 throw_error (TLS_GENERIC_ERROR
,
7906 _("TLS not supported or disabled on this target"));
7911 /* Support for inferring a target description based on the current
7912 architecture and the size of a 'g' packet. While the 'g' packet
7913 can have any size (since optional registers can be left off the
7914 end), some sizes are easily recognizable given knowledge of the
7915 approximate architecture. */
7917 struct remote_g_packet_guess
7920 const struct target_desc
*tdesc
;
7922 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
7923 DEF_VEC_O(remote_g_packet_guess_s
);
7925 struct remote_g_packet_data
7927 VEC(remote_g_packet_guess_s
) *guesses
;
7930 static struct gdbarch_data
*remote_g_packet_data_handle
;
7933 remote_g_packet_data_init (struct obstack
*obstack
)
7935 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
7939 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
7940 const struct target_desc
*tdesc
)
7942 struct remote_g_packet_data
*data
7943 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
7944 struct remote_g_packet_guess new_guess
, *guess
;
7947 gdb_assert (tdesc
!= NULL
);
7950 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7952 if (guess
->bytes
== bytes
)
7953 internal_error (__FILE__
, __LINE__
,
7954 "Duplicate g packet description added for size %d",
7957 new_guess
.bytes
= bytes
;
7958 new_guess
.tdesc
= tdesc
;
7959 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
7962 /* Return 1 if remote_read_description would do anything on this target
7963 and architecture, 0 otherwise. */
7966 remote_read_description_p (struct target_ops
*target
)
7968 struct remote_g_packet_data
*data
7969 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7971 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7977 static const struct target_desc
*
7978 remote_read_description (struct target_ops
*target
)
7980 struct remote_g_packet_data
*data
7981 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7983 /* Do not try this during initial connection, when we do not know
7984 whether there is a running but stopped thread. */
7985 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
7988 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7990 struct remote_g_packet_guess
*guess
;
7992 int bytes
= send_g_packet ();
7995 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7997 if (guess
->bytes
== bytes
)
7998 return guess
->tdesc
;
8000 /* We discard the g packet. A minor optimization would be to
8001 hold on to it, and fill the register cache once we have selected
8002 an architecture, but it's too tricky to do safely. */
8008 /* Remote file transfer support. This is host-initiated I/O, not
8009 target-initiated; for target-initiated, see remote-fileio.c. */
8011 /* If *LEFT is at least the length of STRING, copy STRING to
8012 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8013 decrease *LEFT. Otherwise raise an error. */
8016 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8018 int len
= strlen (string
);
8021 error (_("Packet too long for target."));
8023 memcpy (*buffer
, string
, len
);
8027 /* NUL-terminate the buffer as a convenience, if there is
8033 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8034 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8035 decrease *LEFT. Otherwise raise an error. */
8038 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8041 if (2 * len
> *left
)
8042 error (_("Packet too long for target."));
8044 bin2hex (bytes
, *buffer
, len
);
8048 /* NUL-terminate the buffer as a convenience, if there is
8054 /* If *LEFT is large enough, convert VALUE to hex and add it to
8055 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8056 decrease *LEFT. Otherwise raise an error. */
8059 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8061 int len
= hexnumlen (value
);
8064 error (_("Packet too long for target."));
8066 hexnumstr (*buffer
, value
);
8070 /* NUL-terminate the buffer as a convenience, if there is
8076 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8077 value, *REMOTE_ERRNO to the remote error number or zero if none
8078 was included, and *ATTACHMENT to point to the start of the annex
8079 if any. The length of the packet isn't needed here; there may
8080 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8082 Return 0 if the packet could be parsed, -1 if it could not. If
8083 -1 is returned, the other variables may not be initialized. */
8086 remote_hostio_parse_result (char *buffer
, int *retcode
,
8087 int *remote_errno
, char **attachment
)
8094 if (buffer
[0] != 'F')
8098 *retcode
= strtol (&buffer
[1], &p
, 16);
8099 if (errno
!= 0 || p
== &buffer
[1])
8102 /* Check for ",errno". */
8106 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8107 if (errno
!= 0 || p
+ 1 == p2
)
8112 /* Check for ";attachment". If there is no attachment, the
8113 packet should end here. */
8116 *attachment
= p
+ 1;
8119 else if (*p
== '\0')
8125 /* Send a prepared I/O packet to the target and read its response.
8126 The prepared packet is in the global RS->BUF before this function
8127 is called, and the answer is there when we return.
8129 COMMAND_BYTES is the length of the request to send, which may include
8130 binary data. WHICH_PACKET is the packet configuration to check
8131 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8132 is set to the error number and -1 is returned. Otherwise the value
8133 returned by the function is returned.
8135 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8136 attachment is expected; an error will be reported if there's a
8137 mismatch. If one is found, *ATTACHMENT will be set to point into
8138 the packet buffer and *ATTACHMENT_LEN will be set to the
8139 attachment's length. */
8142 remote_hostio_send_command (int command_bytes
, int which_packet
,
8143 int *remote_errno
, char **attachment
,
8144 int *attachment_len
)
8146 struct remote_state
*rs
= get_remote_state ();
8147 int ret
, bytes_read
;
8148 char *attachment_tmp
;
8151 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
8153 *remote_errno
= FILEIO_ENOSYS
;
8157 putpkt_binary (rs
->buf
, command_bytes
);
8158 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8160 /* If it timed out, something is wrong. Don't try to parse the
8164 *remote_errno
= FILEIO_EINVAL
;
8168 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
8171 *remote_errno
= FILEIO_EINVAL
;
8173 case PACKET_UNKNOWN
:
8174 *remote_errno
= FILEIO_ENOSYS
;
8180 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
8183 *remote_errno
= FILEIO_EINVAL
;
8187 /* Make sure we saw an attachment if and only if we expected one. */
8188 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
8189 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
8191 *remote_errno
= FILEIO_EINVAL
;
8195 /* If an attachment was found, it must point into the packet buffer;
8196 work out how many bytes there were. */
8197 if (attachment_tmp
!= NULL
)
8199 *attachment
= attachment_tmp
;
8200 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
8206 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8207 remote file descriptor, or -1 if an error occurs (and set
8211 remote_hostio_open (const char *filename
, int flags
, int mode
,
8214 struct remote_state
*rs
= get_remote_state ();
8216 int left
= get_remote_packet_size () - 1;
8218 remote_buffer_add_string (&p
, &left
, "vFile:open:");
8220 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8222 remote_buffer_add_string (&p
, &left
, ",");
8224 remote_buffer_add_int (&p
, &left
, flags
);
8225 remote_buffer_add_string (&p
, &left
, ",");
8227 remote_buffer_add_int (&p
, &left
, mode
);
8229 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
8230 remote_errno
, NULL
, NULL
);
8233 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8234 Return the number of bytes written, or -1 if an error occurs (and
8235 set *REMOTE_ERRNO). */
8238 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
8239 ULONGEST offset
, int *remote_errno
)
8241 struct remote_state
*rs
= get_remote_state ();
8243 int left
= get_remote_packet_size ();
8246 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
8248 remote_buffer_add_int (&p
, &left
, fd
);
8249 remote_buffer_add_string (&p
, &left
, ",");
8251 remote_buffer_add_int (&p
, &left
, offset
);
8252 remote_buffer_add_string (&p
, &left
, ",");
8254 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
8255 get_remote_packet_size () - (p
- rs
->buf
));
8257 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
8258 remote_errno
, NULL
, NULL
);
8261 /* Read up to LEN bytes FD on the remote target into READ_BUF
8262 Return the number of bytes read, or -1 if an error occurs (and
8263 set *REMOTE_ERRNO). */
8266 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
8267 ULONGEST offset
, int *remote_errno
)
8269 struct remote_state
*rs
= get_remote_state ();
8272 int left
= get_remote_packet_size ();
8273 int ret
, attachment_len
;
8276 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
8278 remote_buffer_add_int (&p
, &left
, fd
);
8279 remote_buffer_add_string (&p
, &left
, ",");
8281 remote_buffer_add_int (&p
, &left
, len
);
8282 remote_buffer_add_string (&p
, &left
, ",");
8284 remote_buffer_add_int (&p
, &left
, offset
);
8286 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
8287 remote_errno
, &attachment
,
8293 read_len
= remote_unescape_input (attachment
, attachment_len
,
8295 if (read_len
!= ret
)
8296 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
8301 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8302 (and set *REMOTE_ERRNO). */
8305 remote_hostio_close (int fd
, int *remote_errno
)
8307 struct remote_state
*rs
= get_remote_state ();
8309 int left
= get_remote_packet_size () - 1;
8311 remote_buffer_add_string (&p
, &left
, "vFile:close:");
8313 remote_buffer_add_int (&p
, &left
, fd
);
8315 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
8316 remote_errno
, NULL
, NULL
);
8319 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8320 occurs (and set *REMOTE_ERRNO). */
8323 remote_hostio_unlink (const char *filename
, int *remote_errno
)
8325 struct remote_state
*rs
= get_remote_state ();
8327 int left
= get_remote_packet_size () - 1;
8329 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
8331 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8334 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
8335 remote_errno
, NULL
, NULL
);
8339 remote_fileio_errno_to_host (int errnum
)
8363 case FILEIO_ENOTDIR
:
8383 case FILEIO_ENAMETOOLONG
:
8384 return ENAMETOOLONG
;
8390 remote_hostio_error (int errnum
)
8392 int host_error
= remote_fileio_errno_to_host (errnum
);
8394 if (host_error
== -1)
8395 error (_("Unknown remote I/O error %d"), errnum
);
8397 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
8401 remote_hostio_close_cleanup (void *opaque
)
8403 int fd
= *(int *) opaque
;
8406 remote_hostio_close (fd
, &remote_errno
);
8411 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
8413 const char *filename
= bfd_get_filename (abfd
);
8414 int fd
, remote_errno
;
8417 gdb_assert (remote_filename_p (filename
));
8419 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
8422 errno
= remote_fileio_errno_to_host (remote_errno
);
8423 bfd_set_error (bfd_error_system_call
);
8427 stream
= xmalloc (sizeof (int));
8433 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
8435 int fd
= *(int *)stream
;
8440 /* Ignore errors on close; these may happen if the remote
8441 connection was already torn down. */
8442 remote_hostio_close (fd
, &remote_errno
);
8448 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
8449 file_ptr nbytes
, file_ptr offset
)
8451 int fd
= *(int *)stream
;
8453 file_ptr pos
, bytes
;
8456 while (nbytes
> pos
)
8458 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
8459 offset
+ pos
, &remote_errno
);
8461 /* Success, but no bytes, means end-of-file. */
8465 errno
= remote_fileio_errno_to_host (remote_errno
);
8466 bfd_set_error (bfd_error_system_call
);
8477 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
8479 /* FIXME: We should probably implement remote_hostio_stat. */
8480 sb
->st_size
= INT_MAX
;
8485 remote_filename_p (const char *filename
)
8487 return strncmp (filename
, "remote:", 7) == 0;
8491 remote_bfd_open (const char *remote_file
, const char *target
)
8493 return bfd_openr_iovec (remote_file
, target
,
8494 remote_bfd_iovec_open
, NULL
,
8495 remote_bfd_iovec_pread
,
8496 remote_bfd_iovec_close
,
8497 remote_bfd_iovec_stat
);
8501 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
8503 struct cleanup
*back_to
, *close_cleanup
;
8504 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8507 int bytes_in_buffer
;
8512 error (_("command can only be used with remote target"));
8514 file
= fopen (local_file
, "rb");
8516 perror_with_name (local_file
);
8517 back_to
= make_cleanup_fclose (file
);
8519 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
8521 0700, &remote_errno
);
8523 remote_hostio_error (remote_errno
);
8525 /* Send up to this many bytes at once. They won't all fit in the
8526 remote packet limit, so we'll transfer slightly fewer. */
8527 io_size
= get_remote_packet_size ();
8528 buffer
= xmalloc (io_size
);
8529 make_cleanup (xfree
, buffer
);
8531 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8533 bytes_in_buffer
= 0;
8536 while (bytes_in_buffer
|| !saw_eof
)
8540 bytes
= fread (buffer
+ bytes_in_buffer
, 1, io_size
- bytes_in_buffer
,
8545 error (_("Error reading %s."), local_file
);
8548 /* EOF. Unless there is something still in the
8549 buffer from the last iteration, we are done. */
8551 if (bytes_in_buffer
== 0)
8559 bytes
+= bytes_in_buffer
;
8560 bytes_in_buffer
= 0;
8562 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
, offset
, &remote_errno
);
8565 remote_hostio_error (remote_errno
);
8566 else if (retcode
== 0)
8567 error (_("Remote write of %d bytes returned 0!"), bytes
);
8568 else if (retcode
< bytes
)
8570 /* Short write. Save the rest of the read data for the next
8572 bytes_in_buffer
= bytes
- retcode
;
8573 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
8579 discard_cleanups (close_cleanup
);
8580 if (remote_hostio_close (fd
, &remote_errno
))
8581 remote_hostio_error (remote_errno
);
8584 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
8585 do_cleanups (back_to
);
8589 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
8591 struct cleanup
*back_to
, *close_cleanup
;
8592 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8598 error (_("command can only be used with remote target"));
8600 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
8602 remote_hostio_error (remote_errno
);
8604 file
= fopen (local_file
, "wb");
8606 perror_with_name (local_file
);
8607 back_to
= make_cleanup_fclose (file
);
8609 /* Send up to this many bytes at once. They won't all fit in the
8610 remote packet limit, so we'll transfer slightly fewer. */
8611 io_size
= get_remote_packet_size ();
8612 buffer
= xmalloc (io_size
);
8613 make_cleanup (xfree
, buffer
);
8615 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8620 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
8622 /* Success, but no bytes, means end-of-file. */
8625 remote_hostio_error (remote_errno
);
8629 bytes
= fwrite (buffer
, 1, bytes
, file
);
8631 perror_with_name (local_file
);
8634 discard_cleanups (close_cleanup
);
8635 if (remote_hostio_close (fd
, &remote_errno
))
8636 remote_hostio_error (remote_errno
);
8639 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
8640 do_cleanups (back_to
);
8644 remote_file_delete (const char *remote_file
, int from_tty
)
8646 int retcode
, remote_errno
;
8649 error (_("command can only be used with remote target"));
8651 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
8653 remote_hostio_error (remote_errno
);
8656 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
8660 remote_put_command (char *args
, int from_tty
)
8662 struct cleanup
*back_to
;
8666 error_no_arg (_("file to put"));
8668 argv
= gdb_buildargv (args
);
8669 back_to
= make_cleanup_freeargv (argv
);
8670 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8671 error (_("Invalid parameters to remote put"));
8673 remote_file_put (argv
[0], argv
[1], from_tty
);
8675 do_cleanups (back_to
);
8679 remote_get_command (char *args
, int from_tty
)
8681 struct cleanup
*back_to
;
8685 error_no_arg (_("file to get"));
8687 argv
= gdb_buildargv (args
);
8688 back_to
= make_cleanup_freeargv (argv
);
8689 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8690 error (_("Invalid parameters to remote get"));
8692 remote_file_get (argv
[0], argv
[1], from_tty
);
8694 do_cleanups (back_to
);
8698 remote_delete_command (char *args
, int from_tty
)
8700 struct cleanup
*back_to
;
8704 error_no_arg (_("file to delete"));
8706 argv
= gdb_buildargv (args
);
8707 back_to
= make_cleanup_freeargv (argv
);
8708 if (argv
[0] == NULL
|| argv
[1] != NULL
)
8709 error (_("Invalid parameters to remote delete"));
8711 remote_file_delete (argv
[0], from_tty
);
8713 do_cleanups (back_to
);
8717 remote_command (char *args
, int from_tty
)
8719 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
8722 static int remote_target_can_reverse
= 1;
8725 remote_can_execute_reverse (void)
8727 return remote_target_can_reverse
;
8731 remote_supports_non_stop (void)
8737 remote_supports_multi_process (void)
8739 struct remote_state
*rs
= get_remote_state ();
8740 return remote_multi_process_p (rs
);
8744 init_remote_ops (void)
8746 remote_ops
.to_shortname
= "remote";
8747 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
8749 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8750 Specify the serial device it is connected to\n\
8751 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
8752 remote_ops
.to_open
= remote_open
;
8753 remote_ops
.to_close
= remote_close
;
8754 remote_ops
.to_detach
= remote_detach
;
8755 remote_ops
.to_disconnect
= remote_disconnect
;
8756 remote_ops
.to_resume
= remote_resume
;
8757 remote_ops
.to_wait
= remote_wait
;
8758 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
8759 remote_ops
.to_store_registers
= remote_store_registers
;
8760 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
8761 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
8762 remote_ops
.to_files_info
= remote_files_info
;
8763 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
8764 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
8765 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
8766 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
8767 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
8768 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
8769 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
8770 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
8771 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
8772 remote_ops
.to_kill
= remote_kill
;
8773 remote_ops
.to_load
= generic_load
;
8774 remote_ops
.to_mourn_inferior
= remote_mourn
;
8775 remote_ops
.to_thread_alive
= remote_thread_alive
;
8776 remote_ops
.to_find_new_threads
= remote_threads_info
;
8777 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
8778 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
8779 remote_ops
.to_stop
= remote_stop
;
8780 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
8781 remote_ops
.to_rcmd
= remote_rcmd
;
8782 remote_ops
.to_log_command
= serial_log_command
;
8783 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
8784 remote_ops
.to_stratum
= process_stratum
;
8785 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
8786 remote_ops
.to_has_memory
= default_child_has_memory
;
8787 remote_ops
.to_has_stack
= default_child_has_stack
;
8788 remote_ops
.to_has_registers
= default_child_has_registers
;
8789 remote_ops
.to_has_execution
= default_child_has_execution
;
8790 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
8791 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
8792 remote_ops
.to_magic
= OPS_MAGIC
;
8793 remote_ops
.to_memory_map
= remote_memory_map
;
8794 remote_ops
.to_flash_erase
= remote_flash_erase
;
8795 remote_ops
.to_flash_done
= remote_flash_done
;
8796 remote_ops
.to_read_description
= remote_read_description
;
8797 remote_ops
.to_search_memory
= remote_search_memory
;
8798 remote_ops
.to_can_async_p
= remote_can_async_p
;
8799 remote_ops
.to_is_async_p
= remote_is_async_p
;
8800 remote_ops
.to_async
= remote_async
;
8801 remote_ops
.to_async_mask
= remote_async_mask
;
8802 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
8803 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
8804 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
8805 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
8808 /* Set up the extended remote vector by making a copy of the standard
8809 remote vector and adding to it. */
8812 init_extended_remote_ops (void)
8814 extended_remote_ops
= remote_ops
;
8816 extended_remote_ops
.to_shortname
= "extended-remote";
8817 extended_remote_ops
.to_longname
=
8818 "Extended remote serial target in gdb-specific protocol";
8819 extended_remote_ops
.to_doc
=
8820 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8821 Specify the serial device it is connected to (e.g. /dev/ttya).";
8822 extended_remote_ops
.to_open
= extended_remote_open
;
8823 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
8824 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
8825 extended_remote_ops
.to_detach
= extended_remote_detach
;
8826 extended_remote_ops
.to_attach
= extended_remote_attach
;
8827 extended_remote_ops
.to_kill
= extended_remote_kill
;
8831 remote_can_async_p (void)
8833 if (!target_async_permitted
)
8834 /* We only enable async when the user specifically asks for it. */
8837 /* We're async whenever the serial device is. */
8838 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
8842 remote_is_async_p (void)
8844 if (!target_async_permitted
)
8845 /* We only enable async when the user specifically asks for it. */
8848 /* We're async whenever the serial device is. */
8849 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
8852 /* Pass the SERIAL event on and up to the client. One day this code
8853 will be able to delay notifying the client of an event until the
8854 point where an entire packet has been received. */
8856 static void (*async_client_callback
) (enum inferior_event_type event_type
,
8858 static void *async_client_context
;
8859 static serial_event_ftype remote_async_serial_handler
;
8862 remote_async_serial_handler (struct serial
*scb
, void *context
)
8864 /* Don't propogate error information up to the client. Instead let
8865 the client find out about the error by querying the target. */
8866 async_client_callback (INF_REG_EVENT
, async_client_context
);
8870 remote_async_inferior_event_handler (gdb_client_data data
)
8872 inferior_event_handler (INF_REG_EVENT
, NULL
);
8876 remote_async_get_pending_events_handler (gdb_client_data data
)
8878 remote_get_pending_stop_replies ();
8882 remote_async (void (*callback
) (enum inferior_event_type event_type
,
8883 void *context
), void *context
)
8885 if (remote_async_mask_value
== 0)
8886 internal_error (__FILE__
, __LINE__
,
8887 _("Calling remote_async when async is masked"));
8889 if (callback
!= NULL
)
8891 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
8892 async_client_callback
= callback
;
8893 async_client_context
= context
;
8896 serial_async (remote_desc
, NULL
, NULL
);
8900 remote_async_mask (int new_mask
)
8902 int curr_mask
= remote_async_mask_value
;
8903 remote_async_mask_value
= new_mask
;
8908 set_remote_cmd (char *args
, int from_tty
)
8910 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
8914 show_remote_cmd (char *args
, int from_tty
)
8916 /* We can't just use cmd_show_list here, because we want to skip
8917 the redundant "show remote Z-packet" and the legacy aliases. */
8918 struct cleanup
*showlist_chain
;
8919 struct cmd_list_element
*list
= remote_show_cmdlist
;
8921 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
8922 for (; list
!= NULL
; list
= list
->next
)
8923 if (strcmp (list
->name
, "Z-packet") == 0)
8925 else if (list
->type
== not_set_cmd
)
8926 /* Alias commands are exactly like the original, except they
8927 don't have the normal type. */
8931 struct cleanup
*option_chain
8932 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
8933 ui_out_field_string (uiout
, "name", list
->name
);
8934 ui_out_text (uiout
, ": ");
8935 if (list
->type
== show_cmd
)
8936 do_setshow_command ((char *) NULL
, from_tty
, list
);
8938 cmd_func (list
, NULL
, from_tty
);
8939 /* Close the tuple. */
8940 do_cleanups (option_chain
);
8943 /* Close the tuple. */
8944 do_cleanups (showlist_chain
);
8948 /* Function to be called whenever a new objfile (shlib) is detected. */
8950 remote_new_objfile (struct objfile
*objfile
)
8952 if (remote_desc
!= 0) /* Have a remote connection. */
8953 remote_check_symbols (objfile
);
8957 _initialize_remote (void)
8959 struct remote_state
*rs
;
8961 /* architecture specific data */
8962 remote_gdbarch_data_handle
=
8963 gdbarch_data_register_post_init (init_remote_state
);
8964 remote_g_packet_data_handle
=
8965 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
8967 /* Initialize the per-target state. At the moment there is only one
8968 of these, not one per target. Only one target is active at a
8969 time. The default buffer size is unimportant; it will be expanded
8970 whenever a larger buffer is needed. */
8971 rs
= get_remote_state_raw ();
8973 rs
->buf
= xmalloc (rs
->buf_size
);
8976 add_target (&remote_ops
);
8978 init_extended_remote_ops ();
8979 add_target (&extended_remote_ops
);
8981 /* Hook into new objfile notification. */
8982 observer_attach_new_objfile (remote_new_objfile
);
8984 /* Set up signal handlers. */
8985 sigint_remote_token
=
8986 create_async_signal_handler (async_remote_interrupt
, NULL
);
8987 sigint_remote_twice_token
=
8988 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
8991 init_remote_threadtests ();
8994 /* set/show remote ... */
8996 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
8997 Remote protocol specific variables\n\
8998 Configure various remote-protocol specific variables such as\n\
8999 the packets being used"),
9000 &remote_set_cmdlist
, "set remote ",
9001 0 /* allow-unknown */, &setlist
);
9002 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
9003 Remote protocol specific variables\n\
9004 Configure various remote-protocol specific variables such as\n\
9005 the packets being used"),
9006 &remote_show_cmdlist
, "show remote ",
9007 0 /* allow-unknown */, &showlist
);
9009 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
9010 Compare section data on target to the exec file.\n\
9011 Argument is a single section name (default: all loaded sections)."),
9014 add_cmd ("packet", class_maintenance
, packet_command
, _("\
9015 Send an arbitrary packet to a remote target.\n\
9016 maintenance packet TEXT\n\
9017 If GDB is talking to an inferior via the GDB serial protocol, then\n\
9018 this command sends the string TEXT to the inferior, and displays the\n\
9019 response packet. GDB supplies the initial `$' character, and the\n\
9020 terminating `#' character and checksum."),
9023 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
9024 Set whether to send break if interrupted."), _("\
9025 Show whether to send break if interrupted."), _("\
9026 If set, a break, instead of a cntrl-c, is sent to the remote target."),
9027 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
9028 &setlist
, &showlist
);
9030 /* Install commands for configuring memory read/write packets. */
9032 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
9033 Set the maximum number of bytes per memory write packet (deprecated)."),
9035 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
9036 Show the maximum number of bytes per memory write packet (deprecated)."),
9038 add_cmd ("memory-write-packet-size", no_class
,
9039 set_memory_write_packet_size
, _("\
9040 Set the maximum number of bytes per memory-write packet.\n\
9041 Specify the number of bytes in a packet or 0 (zero) for the\n\
9042 default packet size. The actual limit is further reduced\n\
9043 dependent on the target. Specify ``fixed'' to disable the\n\
9044 further restriction and ``limit'' to enable that restriction."),
9045 &remote_set_cmdlist
);
9046 add_cmd ("memory-read-packet-size", no_class
,
9047 set_memory_read_packet_size
, _("\
9048 Set the maximum number of bytes per memory-read packet.\n\
9049 Specify the number of bytes in a packet or 0 (zero) for the\n\
9050 default packet size. The actual limit is further reduced\n\
9051 dependent on the target. Specify ``fixed'' to disable the\n\
9052 further restriction and ``limit'' to enable that restriction."),
9053 &remote_set_cmdlist
);
9054 add_cmd ("memory-write-packet-size", no_class
,
9055 show_memory_write_packet_size
,
9056 _("Show the maximum number of bytes per memory-write packet."),
9057 &remote_show_cmdlist
);
9058 add_cmd ("memory-read-packet-size", no_class
,
9059 show_memory_read_packet_size
,
9060 _("Show the maximum number of bytes per memory-read packet."),
9061 &remote_show_cmdlist
);
9063 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
9064 &remote_hw_watchpoint_limit
, _("\
9065 Set the maximum number of target hardware watchpoints."), _("\
9066 Show the maximum number of target hardware watchpoints."), _("\
9067 Specify a negative limit for unlimited."),
9068 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
9069 &remote_set_cmdlist
, &remote_show_cmdlist
);
9070 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
9071 &remote_hw_breakpoint_limit
, _("\
9072 Set the maximum number of target hardware breakpoints."), _("\
9073 Show the maximum number of target hardware breakpoints."), _("\
9074 Specify a negative limit for unlimited."),
9075 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
9076 &remote_set_cmdlist
, &remote_show_cmdlist
);
9078 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
9079 &remote_address_size
, _("\
9080 Set the maximum size of the address (in bits) in a memory packet."), _("\
9081 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
9083 NULL
, /* FIXME: i18n: */
9084 &setlist
, &showlist
);
9086 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
9087 "X", "binary-download", 1);
9089 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
9090 "vCont", "verbose-resume", 0);
9092 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
9093 "QPassSignals", "pass-signals", 0);
9095 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
9096 "qSymbol", "symbol-lookup", 0);
9098 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
9099 "P", "set-register", 1);
9101 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
9102 "p", "fetch-register", 1);
9104 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
9105 "Z0", "software-breakpoint", 0);
9107 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
9108 "Z1", "hardware-breakpoint", 0);
9110 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
9111 "Z2", "write-watchpoint", 0);
9113 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
9114 "Z3", "read-watchpoint", 0);
9116 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
9117 "Z4", "access-watchpoint", 0);
9119 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
9120 "qXfer:auxv:read", "read-aux-vector", 0);
9122 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
9123 "qXfer:features:read", "target-features", 0);
9125 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
9126 "qXfer:libraries:read", "library-info", 0);
9128 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
9129 "qXfer:memory-map:read", "memory-map", 0);
9131 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
9132 "qXfer:spu:read", "read-spu-object", 0);
9134 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
9135 "qXfer:spu:write", "write-spu-object", 0);
9137 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
9138 "qXfer:osdata:read", "osdata", 0);
9140 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
9141 "qXfer:siginfo:read", "read-siginfo-object", 0);
9143 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
9144 "qXfer:siginfo:write", "write-siginfo-object", 0);
9146 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
9147 "qGetTLSAddr", "get-thread-local-storage-address",
9150 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
9151 "qSupported", "supported-packets", 0);
9153 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
9154 "qSearch:memory", "search-memory", 0);
9156 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
9157 "vFile:open", "hostio-open", 0);
9159 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
9160 "vFile:pread", "hostio-pread", 0);
9162 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
9163 "vFile:pwrite", "hostio-pwrite", 0);
9165 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
9166 "vFile:close", "hostio-close", 0);
9168 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
9169 "vFile:unlink", "hostio-unlink", 0);
9171 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
9172 "vAttach", "attach", 0);
9174 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
9177 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
9178 "QStartNoAckMode", "noack", 0);
9180 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
9181 "vKill", "kill", 0);
9183 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
9184 "qAttached", "query-attached", 0);
9186 /* Keep the old ``set remote Z-packet ...'' working. Each individual
9187 Z sub-packet has its own set and show commands, but users may
9188 have sets to this variable in their .gdbinit files (or in their
9190 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
9191 &remote_Z_packet_detect
, _("\
9192 Set use of remote protocol `Z' packets"), _("\
9193 Show use of remote protocol `Z' packets "), _("\
9194 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
9196 set_remote_protocol_Z_packet_cmd
,
9197 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
9198 &remote_set_cmdlist
, &remote_show_cmdlist
);
9200 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
9201 Manipulate files on the remote system\n\
9202 Transfer files to and from the remote target system."),
9203 &remote_cmdlist
, "remote ",
9204 0 /* allow-unknown */, &cmdlist
);
9206 add_cmd ("put", class_files
, remote_put_command
,
9207 _("Copy a local file to the remote system."),
9210 add_cmd ("get", class_files
, remote_get_command
,
9211 _("Copy a remote file to the local system."),
9214 add_cmd ("delete", class_files
, remote_delete_command
,
9215 _("Delete a remote file."),
9218 remote_exec_file
= xstrdup ("");
9219 add_setshow_string_noescape_cmd ("exec-file", class_files
,
9220 &remote_exec_file
, _("\
9221 Set the remote pathname for \"run\""), _("\
9222 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
9223 &remote_set_cmdlist
, &remote_show_cmdlist
);
9225 /* Eventually initialize fileio. See fileio.c */
9226 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
9228 /* Take advantage of the fact that the LWP field is not used, to tag
9229 special ptids with it set to != 0. */
9230 magic_null_ptid
= ptid_build (42000, 1, -1);
9231 not_sent_ptid
= ptid_build (42000, 1, -2);
9232 any_thread_ptid
= ptid_build (42000, 1, 0);