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. */
298 /* True if the stub reports support for conditional tracepoints. */
299 int cond_tracepoints
;
302 /* Returns true if the multi-process extensions are in effect. */
304 remote_multi_process_p (struct remote_state
*rs
)
306 return rs
->extended
&& rs
->multi_process_aware
;
309 /* This data could be associated with a target, but we do not always
310 have access to the current target when we need it, so for now it is
311 static. This will be fine for as long as only one target is in use
313 static struct remote_state remote_state
;
315 static struct remote_state
*
316 get_remote_state_raw (void)
318 return &remote_state
;
321 /* Description of the remote protocol for a given architecture. */
325 long offset
; /* Offset into G packet. */
326 long regnum
; /* GDB's internal register number. */
327 LONGEST pnum
; /* Remote protocol register number. */
328 int in_g_packet
; /* Always part of G packet. */
329 /* long size in bytes; == register_size (target_gdbarch, regnum);
331 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
335 struct remote_arch_state
337 /* Description of the remote protocol registers. */
338 long sizeof_g_packet
;
340 /* Description of the remote protocol registers indexed by REGNUM
341 (making an array gdbarch_num_regs in size). */
342 struct packet_reg
*regs
;
344 /* This is the size (in chars) of the first response to the ``g''
345 packet. It is used as a heuristic when determining the maximum
346 size of memory-read and memory-write packets. A target will
347 typically only reserve a buffer large enough to hold the ``g''
348 packet. The size does not include packet overhead (headers and
350 long actual_register_packet_size
;
352 /* This is the maximum size (in chars) of a non read/write packet.
353 It is also used as a cap on the size of read/write packets. */
354 long remote_packet_size
;
358 /* Handle for retreving the remote protocol data from gdbarch. */
359 static struct gdbarch_data
*remote_gdbarch_data_handle
;
361 static struct remote_arch_state
*
362 get_remote_arch_state (void)
364 return gdbarch_data (target_gdbarch
, remote_gdbarch_data_handle
);
367 /* Fetch the global remote target state. */
369 static struct remote_state
*
370 get_remote_state (void)
372 /* Make sure that the remote architecture state has been
373 initialized, because doing so might reallocate rs->buf. Any
374 function which calls getpkt also needs to be mindful of changes
375 to rs->buf, but this call limits the number of places which run
377 get_remote_arch_state ();
379 return get_remote_state_raw ();
383 compare_pnums (const void *lhs_
, const void *rhs_
)
385 const struct packet_reg
* const *lhs
= lhs_
;
386 const struct packet_reg
* const *rhs
= rhs_
;
388 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
390 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
397 init_remote_state (struct gdbarch
*gdbarch
)
399 int regnum
, num_remote_regs
, offset
;
400 struct remote_state
*rs
= get_remote_state_raw ();
401 struct remote_arch_state
*rsa
;
402 struct packet_reg
**remote_regs
;
404 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
406 /* Use the architecture to build a regnum<->pnum table, which will be
407 1:1 unless a feature set specifies otherwise. */
408 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
409 gdbarch_num_regs (gdbarch
),
411 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
413 struct packet_reg
*r
= &rsa
->regs
[regnum
];
415 if (register_size (gdbarch
, regnum
) == 0)
416 /* Do not try to fetch zero-sized (placeholder) registers. */
419 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
424 /* Define the g/G packet format as the contents of each register
425 with a remote protocol number, in order of ascending protocol
428 remote_regs
= alloca (gdbarch_num_regs (gdbarch
)
429 * sizeof (struct packet_reg
*));
430 for (num_remote_regs
= 0, regnum
= 0;
431 regnum
< gdbarch_num_regs (gdbarch
);
433 if (rsa
->regs
[regnum
].pnum
!= -1)
434 remote_regs
[num_remote_regs
++] = &rsa
->regs
[regnum
];
436 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
439 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
441 remote_regs
[regnum
]->in_g_packet
= 1;
442 remote_regs
[regnum
]->offset
= offset
;
443 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
446 /* Record the maximum possible size of the g packet - it may turn out
448 rsa
->sizeof_g_packet
= offset
;
450 /* Default maximum number of characters in a packet body. Many
451 remote stubs have a hardwired buffer size of 400 bytes
452 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
453 as the maximum packet-size to ensure that the packet and an extra
454 NUL character can always fit in the buffer. This stops GDB
455 trashing stubs that try to squeeze an extra NUL into what is
456 already a full buffer (As of 1999-12-04 that was most stubs). */
457 rsa
->remote_packet_size
= 400 - 1;
459 /* This one is filled in when a ``g'' packet is received. */
460 rsa
->actual_register_packet_size
= 0;
462 /* Should rsa->sizeof_g_packet needs more space than the
463 default, adjust the size accordingly. Remember that each byte is
464 encoded as two characters. 32 is the overhead for the packet
465 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
466 (``$NN:G...#NN'') is a better guess, the below has been padded a
468 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
469 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
471 /* Make sure that the packet buffer is plenty big enough for
472 this architecture. */
473 if (rs
->buf_size
< rsa
->remote_packet_size
)
475 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
476 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
482 /* Return the current allowed size of a remote packet. This is
483 inferred from the current architecture, and should be used to
484 limit the length of outgoing packets. */
486 get_remote_packet_size (void)
488 struct remote_state
*rs
= get_remote_state ();
489 struct remote_arch_state
*rsa
= get_remote_arch_state ();
491 if (rs
->explicit_packet_size
)
492 return rs
->explicit_packet_size
;
494 return rsa
->remote_packet_size
;
497 static struct packet_reg
*
498 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
500 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch
))
504 struct packet_reg
*r
= &rsa
->regs
[regnum
];
505 gdb_assert (r
->regnum
== regnum
);
510 static struct packet_reg
*
511 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
514 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch
); i
++)
516 struct packet_reg
*r
= &rsa
->regs
[i
];
523 /* FIXME: graces/2002-08-08: These variables should eventually be
524 bound to an instance of the target object (as in gdbarch-tdep()),
525 when such a thing exists. */
527 /* This is set to the data address of the access causing the target
528 to stop for a watchpoint. */
529 static CORE_ADDR remote_watch_data_address
;
531 /* This is non-zero if target stopped for a watchpoint. */
532 static int remote_stopped_by_watchpoint_p
;
534 static struct target_ops remote_ops
;
536 static struct target_ops extended_remote_ops
;
538 static int remote_async_mask_value
= 1;
540 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
541 ``forever'' still use the normal timeout mechanism. This is
542 currently used by the ASYNC code to guarentee that target reads
543 during the initial connect always time-out. Once getpkt has been
544 modified to return a timeout indication and, in turn
545 remote_wait()/wait_for_inferior() have gained a timeout parameter
547 static int wait_forever_enabled_p
= 1;
550 /* This variable chooses whether to send a ^C or a break when the user
551 requests program interruption. Although ^C is usually what remote
552 systems expect, and that is the default here, sometimes a break is
553 preferable instead. */
555 static int remote_break
;
557 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
558 remote_open knows that we don't have a file open when the program
560 static struct serial
*remote_desc
= NULL
;
562 /* This variable sets the number of bits in an address that are to be
563 sent in a memory ("M" or "m") packet. Normally, after stripping
564 leading zeros, the entire address would be sent. This variable
565 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
566 initial implementation of remote.c restricted the address sent in
567 memory packets to ``host::sizeof long'' bytes - (typically 32
568 bits). Consequently, for 64 bit targets, the upper 32 bits of an
569 address was never sent. Since fixing this bug may cause a break in
570 some remote targets this variable is principly provided to
571 facilitate backward compatibility. */
573 static int remote_address_size
;
575 /* Temporary to track who currently owns the terminal. See
576 remote_terminal_* for more details. */
578 static int remote_async_terminal_ours_p
;
580 /* The executable file to use for "run" on the remote side. */
582 static char *remote_exec_file
= "";
585 /* User configurable variables for the number of characters in a
586 memory read/write packet. MIN (rsa->remote_packet_size,
587 rsa->sizeof_g_packet) is the default. Some targets need smaller
588 values (fifo overruns, et.al.) and some users need larger values
589 (speed up transfers). The variables ``preferred_*'' (the user
590 request), ``current_*'' (what was actually set) and ``forced_*''
591 (Positive - a soft limit, negative - a hard limit). */
593 struct memory_packet_config
600 /* Compute the current size of a read/write packet. Since this makes
601 use of ``actual_register_packet_size'' the computation is dynamic. */
604 get_memory_packet_size (struct memory_packet_config
*config
)
606 struct remote_state
*rs
= get_remote_state ();
607 struct remote_arch_state
*rsa
= get_remote_arch_state ();
609 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
610 law?) that some hosts don't cope very well with large alloca()
611 calls. Eventually the alloca() code will be replaced by calls to
612 xmalloc() and make_cleanups() allowing this restriction to either
613 be lifted or removed. */
614 #ifndef MAX_REMOTE_PACKET_SIZE
615 #define MAX_REMOTE_PACKET_SIZE 16384
617 /* NOTE: 20 ensures we can write at least one byte. */
618 #ifndef MIN_REMOTE_PACKET_SIZE
619 #define MIN_REMOTE_PACKET_SIZE 20
624 if (config
->size
<= 0)
625 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
627 what_they_get
= config
->size
;
631 what_they_get
= get_remote_packet_size ();
632 /* Limit the packet to the size specified by the user. */
634 && what_they_get
> config
->size
)
635 what_they_get
= config
->size
;
637 /* Limit it to the size of the targets ``g'' response unless we have
638 permission from the stub to use a larger packet size. */
639 if (rs
->explicit_packet_size
== 0
640 && rsa
->actual_register_packet_size
> 0
641 && what_they_get
> rsa
->actual_register_packet_size
)
642 what_they_get
= rsa
->actual_register_packet_size
;
644 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
645 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
646 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
647 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
649 /* Make sure there is room in the global buffer for this packet
650 (including its trailing NUL byte). */
651 if (rs
->buf_size
< what_they_get
+ 1)
653 rs
->buf_size
= 2 * what_they_get
;
654 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
657 return what_they_get
;
660 /* Update the size of a read/write packet. If they user wants
661 something really big then do a sanity check. */
664 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
666 int fixed_p
= config
->fixed_p
;
667 long size
= config
->size
;
669 error (_("Argument required (integer, `fixed' or `limited')."));
670 else if (strcmp (args
, "hard") == 0
671 || strcmp (args
, "fixed") == 0)
673 else if (strcmp (args
, "soft") == 0
674 || strcmp (args
, "limit") == 0)
679 size
= strtoul (args
, &end
, 0);
681 error (_("Invalid %s (bad syntax)."), config
->name
);
683 /* Instead of explicitly capping the size of a packet to
684 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
685 instead allowed to set the size to something arbitrarily
687 if (size
> MAX_REMOTE_PACKET_SIZE
)
688 error (_("Invalid %s (too large)."), config
->name
);
692 if (fixed_p
&& !config
->fixed_p
)
694 if (! query (_("The target may not be able to correctly handle a %s\n"
695 "of %ld bytes. Change the packet size? "),
697 error (_("Packet size not changed."));
699 /* Update the config. */
700 config
->fixed_p
= fixed_p
;
705 show_memory_packet_size (struct memory_packet_config
*config
)
707 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
709 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
710 get_memory_packet_size (config
));
712 printf_filtered (_("Packets are limited to %ld bytes.\n"),
713 get_memory_packet_size (config
));
716 static struct memory_packet_config memory_write_packet_config
=
718 "memory-write-packet-size",
722 set_memory_write_packet_size (char *args
, int from_tty
)
724 set_memory_packet_size (args
, &memory_write_packet_config
);
728 show_memory_write_packet_size (char *args
, int from_tty
)
730 show_memory_packet_size (&memory_write_packet_config
);
734 get_memory_write_packet_size (void)
736 return get_memory_packet_size (&memory_write_packet_config
);
739 static struct memory_packet_config memory_read_packet_config
=
741 "memory-read-packet-size",
745 set_memory_read_packet_size (char *args
, int from_tty
)
747 set_memory_packet_size (args
, &memory_read_packet_config
);
751 show_memory_read_packet_size (char *args
, int from_tty
)
753 show_memory_packet_size (&memory_read_packet_config
);
757 get_memory_read_packet_size (void)
759 long size
= get_memory_packet_size (&memory_read_packet_config
);
760 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
761 extra buffer size argument before the memory read size can be
762 increased beyond this. */
763 if (size
> get_remote_packet_size ())
764 size
= get_remote_packet_size ();
769 /* Generic configuration support for packets the stub optionally
770 supports. Allows the user to specify the use of the packet as well
771 as allowing GDB to auto-detect support in the remote stub. */
775 PACKET_SUPPORT_UNKNOWN
= 0,
784 enum auto_boolean detect
;
785 enum packet_support support
;
788 /* Analyze a packet's return value and update the packet config
799 update_packet_config (struct packet_config
*config
)
801 switch (config
->detect
)
803 case AUTO_BOOLEAN_TRUE
:
804 config
->support
= PACKET_ENABLE
;
806 case AUTO_BOOLEAN_FALSE
:
807 config
->support
= PACKET_DISABLE
;
809 case AUTO_BOOLEAN_AUTO
:
810 config
->support
= PACKET_SUPPORT_UNKNOWN
;
816 show_packet_config_cmd (struct packet_config
*config
)
818 char *support
= "internal-error";
819 switch (config
->support
)
825 support
= "disabled";
827 case PACKET_SUPPORT_UNKNOWN
:
831 switch (config
->detect
)
833 case AUTO_BOOLEAN_AUTO
:
834 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
835 config
->name
, support
);
837 case AUTO_BOOLEAN_TRUE
:
838 case AUTO_BOOLEAN_FALSE
:
839 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
840 config
->name
, support
);
846 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
847 const char *title
, int legacy
)
854 config
->title
= title
;
855 config
->detect
= AUTO_BOOLEAN_AUTO
;
856 config
->support
= PACKET_SUPPORT_UNKNOWN
;
857 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
859 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
861 /* set/show TITLE-packet {auto,on,off} */
862 cmd_name
= xstrprintf ("%s-packet", title
);
863 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
864 &config
->detect
, set_doc
, show_doc
, NULL
, /* help_doc */
865 set_remote_protocol_packet_cmd
,
866 show_remote_protocol_packet_cmd
,
867 &remote_set_cmdlist
, &remote_show_cmdlist
);
868 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
872 legacy_name
= xstrprintf ("%s-packet", name
);
873 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
874 &remote_set_cmdlist
);
875 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
876 &remote_show_cmdlist
);
880 static enum packet_result
881 packet_check_result (const char *buf
)
885 /* The stub recognized the packet request. Check that the
886 operation succeeded. */
888 && isxdigit (buf
[1]) && isxdigit (buf
[2])
890 /* "Enn" - definitly an error. */
893 /* Always treat "E." as an error. This will be used for
894 more verbose error messages, such as E.memtypes. */
895 if (buf
[0] == 'E' && buf
[1] == '.')
898 /* The packet may or may not be OK. Just assume it is. */
902 /* The stub does not support the packet. */
903 return PACKET_UNKNOWN
;
906 static enum packet_result
907 packet_ok (const char *buf
, struct packet_config
*config
)
909 enum packet_result result
;
911 result
= packet_check_result (buf
);
916 /* The stub recognized the packet request. */
917 switch (config
->support
)
919 case PACKET_SUPPORT_UNKNOWN
:
921 fprintf_unfiltered (gdb_stdlog
,
922 "Packet %s (%s) is supported\n",
923 config
->name
, config
->title
);
924 config
->support
= PACKET_ENABLE
;
927 internal_error (__FILE__
, __LINE__
,
928 _("packet_ok: attempt to use a disabled packet"));
935 /* The stub does not support the packet. */
936 switch (config
->support
)
939 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
940 /* If the stub previously indicated that the packet was
941 supported then there is a protocol error.. */
942 error (_("Protocol error: %s (%s) conflicting enabled responses."),
943 config
->name
, config
->title
);
945 /* The user set it wrong. */
946 error (_("Enabled packet %s (%s) not recognized by stub"),
947 config
->name
, config
->title
);
949 case PACKET_SUPPORT_UNKNOWN
:
951 fprintf_unfiltered (gdb_stdlog
,
952 "Packet %s (%s) is NOT supported\n",
953 config
->name
, config
->title
);
954 config
->support
= PACKET_DISABLE
;
982 PACKET_qXfer_features
,
983 PACKET_qXfer_libraries
,
984 PACKET_qXfer_memory_map
,
985 PACKET_qXfer_spu_read
,
986 PACKET_qXfer_spu_write
,
991 PACKET_qSearch_memory
,
994 PACKET_QStartNoAckMode
,
996 PACKET_qXfer_siginfo_read
,
997 PACKET_qXfer_siginfo_write
,
999 PACKET_ConditionalTracepoints
,
1003 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1006 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
1007 struct cmd_list_element
*c
)
1009 struct packet_config
*packet
;
1011 for (packet
= remote_protocol_packets
;
1012 packet
< &remote_protocol_packets
[PACKET_MAX
];
1015 if (&packet
->detect
== c
->var
)
1017 update_packet_config (packet
);
1021 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1026 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1027 struct cmd_list_element
*c
,
1030 struct packet_config
*packet
;
1032 for (packet
= remote_protocol_packets
;
1033 packet
< &remote_protocol_packets
[PACKET_MAX
];
1036 if (&packet
->detect
== c
->var
)
1038 show_packet_config_cmd (packet
);
1042 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1046 /* Should we try one of the 'Z' requests? */
1050 Z_PACKET_SOFTWARE_BP
,
1051 Z_PACKET_HARDWARE_BP
,
1058 /* For compatibility with older distributions. Provide a ``set remote
1059 Z-packet ...'' command that updates all the Z packet types. */
1061 static enum auto_boolean remote_Z_packet_detect
;
1064 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1065 struct cmd_list_element
*c
)
1068 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1070 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1071 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1076 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1077 struct cmd_list_element
*c
,
1081 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1083 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1087 /* Should we try the 'ThreadInfo' query packet?
1089 This variable (NOT available to the user: auto-detect only!)
1090 determines whether GDB will use the new, simpler "ThreadInfo"
1091 query or the older, more complex syntax for thread queries.
1092 This is an auto-detect variable (set to true at each connect,
1093 and set to false when the target fails to recognize it). */
1095 static int use_threadinfo_query
;
1096 static int use_threadextra_query
;
1098 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1099 static struct async_signal_handler
*sigint_remote_twice_token
;
1100 static struct async_signal_handler
*sigint_remote_token
;
1103 /* Asynchronous signal handle registered as event loop source for
1104 when we have pending events ready to be passed to the core. */
1106 static struct async_event_handler
*remote_async_inferior_event_token
;
1108 /* Asynchronous signal handle registered as event loop source for when
1109 the remote sent us a %Stop notification. The registered callback
1110 will do a vStopped sequence to pull the rest of the events out of
1111 the remote side into our event queue. */
1113 static struct async_event_handler
*remote_async_get_pending_events_token
;
1116 static ptid_t magic_null_ptid
;
1117 static ptid_t not_sent_ptid
;
1118 static ptid_t any_thread_ptid
;
1120 /* These are the threads which we last sent to the remote system. The
1121 TID member will be -1 for all or -2 for not sent yet. */
1123 static ptid_t general_thread
;
1124 static ptid_t continue_thread
;
1126 /* Find out if the stub attached to PID (and hence GDB should offer to
1127 detach instead of killing it when bailing out). */
1130 remote_query_attached (int pid
)
1132 struct remote_state
*rs
= get_remote_state ();
1134 if (remote_protocol_packets
[PACKET_qAttached
].support
== PACKET_DISABLE
)
1137 if (remote_multi_process_p (rs
))
1138 sprintf (rs
->buf
, "qAttached:%x", pid
);
1140 sprintf (rs
->buf
, "qAttached");
1143 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1145 switch (packet_ok (rs
->buf
,
1146 &remote_protocol_packets
[PACKET_qAttached
]))
1149 if (strcmp (rs
->buf
, "1") == 0)
1153 warning (_("Remote failure reply: %s"), rs
->buf
);
1155 case PACKET_UNKNOWN
:
1162 /* Add PID to GDB's inferior table. Since we can be connected to a
1163 remote system before before knowing about any inferior, mark the
1164 target with execution when we find the first inferior. If ATTACHED
1165 is 1, then we had just attached to this inferior. If it is 0, then
1166 we just created this inferior. If it is -1, then try querying the
1167 remote stub to find out if it had attached to the inferior or
1170 static struct inferior
*
1171 remote_add_inferior (int pid
, int attached
)
1173 struct inferior
*inf
;
1175 /* Check whether this process we're learning about is to be
1176 considered attached, or if is to be considered to have been
1177 spawned by the stub. */
1179 attached
= remote_query_attached (pid
);
1181 inf
= add_inferior (pid
);
1183 inf
->attach_flag
= attached
;
1188 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1189 according to RUNNING. */
1192 remote_add_thread (ptid_t ptid
, int running
)
1196 set_executing (ptid
, running
);
1197 set_running (ptid
, running
);
1200 /* Come here when we learn about a thread id from the remote target.
1201 It may be the first time we hear about such thread, so take the
1202 opportunity to add it to GDB's thread list. In case this is the
1203 first time we're noticing its corresponding inferior, add it to
1204 GDB's inferior list as well. */
1207 remote_notice_new_inferior (ptid_t currthread
, int running
)
1209 /* If this is a new thread, add it to GDB's thread list.
1210 If we leave it up to WFI to do this, bad things will happen. */
1212 if (in_thread_list (currthread
) && is_exited (currthread
))
1214 /* We're seeing an event on a thread id we knew had exited.
1215 This has to be a new thread reusing the old id. Add it. */
1216 remote_add_thread (currthread
, running
);
1220 if (!in_thread_list (currthread
))
1222 struct inferior
*inf
= NULL
;
1223 int pid
= ptid_get_pid (currthread
);
1225 if (ptid_is_pid (inferior_ptid
)
1226 && pid
== ptid_get_pid (inferior_ptid
))
1228 /* inferior_ptid has no thread member yet. This can happen
1229 with the vAttach -> remote_wait,"TAAthread:" path if the
1230 stub doesn't support qC. This is the first stop reported
1231 after an attach, so this is the main thread. Update the
1232 ptid in the thread list. */
1233 if (in_thread_list (pid_to_ptid (pid
)))
1234 thread_change_ptid (inferior_ptid
, currthread
);
1237 remote_add_thread (currthread
, running
);
1238 inferior_ptid
= currthread
;
1243 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1245 /* inferior_ptid is not set yet. This can happen with the
1246 vRun -> remote_wait,"TAAthread:" path if the stub
1247 doesn't support qC. This is the first stop reported
1248 after an attach, so this is the main thread. Update the
1249 ptid in the thread list. */
1250 thread_change_ptid (inferior_ptid
, currthread
);
1254 /* When connecting to a target remote, or to a target
1255 extended-remote which already was debugging an inferior, we
1256 may not know about it yet. Add it before adding its child
1257 thread, so notifications are emitted in a sensible order. */
1258 if (!in_inferior_list (ptid_get_pid (currthread
)))
1259 inf
= remote_add_inferior (ptid_get_pid (currthread
), -1);
1261 /* This is really a new thread. Add it. */
1262 remote_add_thread (currthread
, running
);
1264 /* If we found a new inferior, let the common code do whatever
1265 it needs to with it (e.g., read shared libraries, insert
1268 notice_new_inferior (currthread
, running
, 0);
1272 /* Call this function as a result of
1273 1) A halt indication (T packet) containing a thread id
1274 2) A direct query of currthread
1275 3) Successful execution of set thread
1279 record_currthread (ptid_t currthread
)
1281 general_thread
= currthread
;
1283 if (ptid_equal (currthread
, minus_one_ptid
))
1284 /* We're just invalidating the local thread mirror. */
1287 remote_notice_new_inferior (currthread
, 0);
1290 static char *last_pass_packet
;
1292 /* If 'QPassSignals' is supported, tell the remote stub what signals
1293 it can simply pass through to the inferior without reporting. */
1296 remote_pass_signals (void)
1298 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1300 char *pass_packet
, *p
;
1301 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1304 gdb_assert (numsigs
< 256);
1305 for (i
= 0; i
< numsigs
; i
++)
1307 if (signal_stop_state (i
) == 0
1308 && signal_print_state (i
) == 0
1309 && signal_pass_state (i
) == 1)
1312 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1313 strcpy (pass_packet
, "QPassSignals:");
1314 p
= pass_packet
+ strlen (pass_packet
);
1315 for (i
= 0; i
< numsigs
; i
++)
1317 if (signal_stop_state (i
) == 0
1318 && signal_print_state (i
) == 0
1319 && signal_pass_state (i
) == 1)
1322 *p
++ = tohex (i
>> 4);
1323 *p
++ = tohex (i
& 15);
1332 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1334 struct remote_state
*rs
= get_remote_state ();
1335 char *buf
= rs
->buf
;
1337 putpkt (pass_packet
);
1338 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1339 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1340 if (last_pass_packet
)
1341 xfree (last_pass_packet
);
1342 last_pass_packet
= pass_packet
;
1345 xfree (pass_packet
);
1349 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1350 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1351 thread. If GEN is set, set the general thread, if not, then set
1352 the step/continue thread. */
1354 set_thread (struct ptid ptid
, int gen
)
1356 struct remote_state
*rs
= get_remote_state ();
1357 ptid_t state
= gen
? general_thread
: continue_thread
;
1358 char *buf
= rs
->buf
;
1359 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
1361 if (ptid_equal (state
, ptid
))
1365 *buf
++ = gen
? 'g' : 'c';
1366 if (ptid_equal (ptid
, magic_null_ptid
))
1367 xsnprintf (buf
, endbuf
- buf
, "0");
1368 else if (ptid_equal (ptid
, any_thread_ptid
))
1369 xsnprintf (buf
, endbuf
- buf
, "0");
1370 else if (ptid_equal (ptid
, minus_one_ptid
))
1371 xsnprintf (buf
, endbuf
- buf
, "-1");
1373 write_ptid (buf
, endbuf
, ptid
);
1375 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1377 general_thread
= ptid
;
1379 continue_thread
= ptid
;
1383 set_general_thread (struct ptid ptid
)
1385 set_thread (ptid
, 1);
1389 set_continue_thread (struct ptid ptid
)
1391 set_thread (ptid
, 0);
1394 /* Change the remote current process. Which thread within the process
1395 ends up selected isn't important, as long as it is the same process
1396 as what INFERIOR_PTID points to.
1398 This comes from that fact that there is no explicit notion of
1399 "selected process" in the protocol. The selected process for
1400 general operations is the process the selected general thread
1404 set_general_process (void)
1406 struct remote_state
*rs
= get_remote_state ();
1408 /* If the remote can't handle multiple processes, don't bother. */
1409 if (!remote_multi_process_p (rs
))
1412 /* We only need to change the remote current thread if it's pointing
1413 at some other process. */
1414 if (ptid_get_pid (general_thread
) != ptid_get_pid (inferior_ptid
))
1415 set_general_thread (inferior_ptid
);
1419 /* Return nonzero if the thread PTID is still alive on the remote
1423 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
1425 struct remote_state
*rs
= get_remote_state ();
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;
1604 /* Multi-process ptid. */
1605 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1607 error (_("invalid remote ptid: %s\n"), p
);
1610 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1613 return ptid_build (pid
, 0, tid
);
1616 /* No multi-process. Just a tid. */
1617 pp
= unpack_varlen_hex (p
, &tid
);
1619 /* Since the stub is not sending a process id, then default to
1620 what's in inferior_ptid, unless it's null at this point. If so,
1621 then since there's no way to know the pid of the reported
1622 threads, use the magic number. */
1623 if (ptid_equal (inferior_ptid
, null_ptid
))
1624 pid
= ptid_get_pid (magic_null_ptid
);
1626 pid
= ptid_get_pid (inferior_ptid
);
1630 return ptid_build (pid
, 0, tid
);
1633 /* Encode 64 bits in 16 chars of hex. */
1635 static const char hexchars
[] = "0123456789abcdef";
1638 ishex (int ch
, int *val
)
1640 if ((ch
>= 'a') && (ch
<= 'f'))
1642 *val
= ch
- 'a' + 10;
1645 if ((ch
>= 'A') && (ch
<= 'F'))
1647 *val
= ch
- 'A' + 10;
1650 if ((ch
>= '0') && (ch
<= '9'))
1661 if (ch
>= 'a' && ch
<= 'f')
1662 return ch
- 'a' + 10;
1663 if (ch
>= '0' && ch
<= '9')
1665 if (ch
>= 'A' && ch
<= 'F')
1666 return ch
- 'A' + 10;
1671 stub_unpack_int (char *buff
, int fieldlength
)
1678 nibble
= stubhex (*buff
++);
1682 retval
= retval
<< 4;
1688 unpack_varlen_hex (char *buff
, /* packet to parse */
1692 ULONGEST retval
= 0;
1694 while (ishex (*buff
, &nibble
))
1697 retval
= retval
<< 4;
1698 retval
|= nibble
& 0x0f;
1705 unpack_nibble (char *buf
, int *val
)
1707 *val
= fromhex (*buf
++);
1712 pack_nibble (char *buf
, int nibble
)
1714 *buf
++ = hexchars
[(nibble
& 0x0f)];
1719 pack_hex_byte (char *pkt
, int byte
)
1721 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1722 *pkt
++ = hexchars
[(byte
& 0xf)];
1727 unpack_byte (char *buf
, int *value
)
1729 *value
= stub_unpack_int (buf
, 2);
1734 pack_int (char *buf
, int value
)
1736 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1737 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1738 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1739 buf
= pack_hex_byte (buf
, (value
& 0xff));
1744 unpack_int (char *buf
, int *value
)
1746 *value
= stub_unpack_int (buf
, 8);
1750 #if 0 /* Currently unused, uncomment when needed. */
1751 static char *pack_string (char *pkt
, char *string
);
1754 pack_string (char *pkt
, char *string
)
1759 len
= strlen (string
);
1761 len
= 200; /* Bigger than most GDB packets, junk??? */
1762 pkt
= pack_hex_byte (pkt
, len
);
1766 if ((ch
== '\0') || (ch
== '#'))
1767 ch
= '*'; /* Protect encapsulation. */
1772 #endif /* 0 (unused) */
1775 unpack_string (char *src
, char *dest
, int length
)
1784 pack_threadid (char *pkt
, threadref
*id
)
1787 unsigned char *altid
;
1789 altid
= (unsigned char *) id
;
1790 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1792 pkt
= pack_hex_byte (pkt
, *altid
++);
1798 unpack_threadid (char *inbuf
, threadref
*id
)
1801 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1804 altref
= (char *) id
;
1806 while (inbuf
< limit
)
1808 x
= stubhex (*inbuf
++);
1809 y
= stubhex (*inbuf
++);
1810 *altref
++ = (x
<< 4) | y
;
1815 /* Externally, threadrefs are 64 bits but internally, they are still
1816 ints. This is due to a mismatch of specifications. We would like
1817 to use 64bit thread references internally. This is an adapter
1821 int_to_threadref (threadref
*id
, int value
)
1823 unsigned char *scan
;
1825 scan
= (unsigned char *) id
;
1831 *scan
++ = (value
>> 24) & 0xff;
1832 *scan
++ = (value
>> 16) & 0xff;
1833 *scan
++ = (value
>> 8) & 0xff;
1834 *scan
++ = (value
& 0xff);
1838 threadref_to_int (threadref
*ref
)
1841 unsigned char *scan
;
1847 value
= (value
<< 8) | ((*scan
++) & 0xff);
1852 copy_threadref (threadref
*dest
, threadref
*src
)
1855 unsigned char *csrc
, *cdest
;
1857 csrc
= (unsigned char *) src
;
1858 cdest
= (unsigned char *) dest
;
1865 threadmatch (threadref
*dest
, threadref
*src
)
1867 /* Things are broken right now, so just assume we got a match. */
1869 unsigned char *srcp
, *destp
;
1871 srcp
= (char *) src
;
1872 destp
= (char *) dest
;
1876 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1883 threadid:1, # always request threadid
1890 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1893 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1895 *pkt
++ = 'q'; /* Info Query */
1896 *pkt
++ = 'P'; /* process or thread info */
1897 pkt
= pack_int (pkt
, mode
); /* mode */
1898 pkt
= pack_threadid (pkt
, id
); /* threadid */
1899 *pkt
= '\0'; /* terminate */
1903 /* These values tag the fields in a thread info response packet. */
1904 /* Tagging the fields allows us to request specific fields and to
1905 add more fields as time goes by. */
1907 #define TAG_THREADID 1 /* Echo the thread identifier. */
1908 #define TAG_EXISTS 2 /* Is this process defined enough to
1909 fetch registers and its stack? */
1910 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1911 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1912 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1916 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1917 struct gdb_ext_thread_info
*info
)
1919 struct remote_state
*rs
= get_remote_state ();
1923 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1926 /* info->threadid = 0; FIXME: implement zero_threadref. */
1928 info
->display
[0] = '\0';
1929 info
->shortname
[0] = '\0';
1930 info
->more_display
[0] = '\0';
1932 /* Assume the characters indicating the packet type have been
1934 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1935 pkt
= unpack_threadid (pkt
, &ref
);
1938 warning (_("Incomplete response to threadinfo request."));
1939 if (!threadmatch (&ref
, expectedref
))
1940 { /* This is an answer to a different request. */
1941 warning (_("ERROR RMT Thread info mismatch."));
1944 copy_threadref (&info
->threadid
, &ref
);
1946 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1948 /* Packets are terminated with nulls. */
1949 while ((pkt
< limit
) && mask
&& *pkt
)
1951 pkt
= unpack_int (pkt
, &tag
); /* tag */
1952 pkt
= unpack_byte (pkt
, &length
); /* length */
1953 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1955 warning (_("ERROR RMT: threadinfo tag mismatch."));
1959 if (tag
== TAG_THREADID
)
1963 warning (_("ERROR RMT: length of threadid is not 16."));
1967 pkt
= unpack_threadid (pkt
, &ref
);
1968 mask
= mask
& ~TAG_THREADID
;
1971 if (tag
== TAG_EXISTS
)
1973 info
->active
= stub_unpack_int (pkt
, length
);
1975 mask
= mask
& ~(TAG_EXISTS
);
1978 warning (_("ERROR RMT: 'exists' length too long."));
1984 if (tag
== TAG_THREADNAME
)
1986 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1987 mask
= mask
& ~TAG_THREADNAME
;
1990 if (tag
== TAG_DISPLAY
)
1992 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1993 mask
= mask
& ~TAG_DISPLAY
;
1996 if (tag
== TAG_MOREDISPLAY
)
1998 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1999 mask
= mask
& ~TAG_MOREDISPLAY
;
2002 warning (_("ERROR RMT: unknown thread info tag."));
2003 break; /* Not a tag we know about. */
2009 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2010 struct gdb_ext_thread_info
*info
)
2012 struct remote_state
*rs
= get_remote_state ();
2015 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2017 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2019 if (rs
->buf
[0] == '\0')
2022 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2027 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2030 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2031 threadref
*nextthread
)
2033 *pkt
++ = 'q'; /* info query packet */
2034 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2035 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2036 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2037 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2042 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2045 parse_threadlist_response (char *pkt
, int result_limit
,
2046 threadref
*original_echo
, threadref
*resultlist
,
2049 struct remote_state
*rs
= get_remote_state ();
2051 int count
, resultcount
, done
;
2054 /* Assume the 'q' and 'M chars have been stripped. */
2055 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2056 /* done parse past here */
2057 pkt
= unpack_byte (pkt
, &count
); /* count field */
2058 pkt
= unpack_nibble (pkt
, &done
);
2059 /* The first threadid is the argument threadid. */
2060 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2061 while ((count
-- > 0) && (pkt
< limit
))
2063 pkt
= unpack_threadid (pkt
, resultlist
++);
2064 if (resultcount
++ >= result_limit
)
2073 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2074 int *done
, int *result_count
, threadref
*threadlist
)
2076 struct remote_state
*rs
= get_remote_state ();
2077 static threadref echo_nextthread
;
2080 /* Trancate result limit to be smaller than the packet size. */
2081 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
2082 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2084 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2086 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2088 if (*rs
->buf
== '\0')
2092 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
2095 if (!threadmatch (&echo_nextthread
, nextthread
))
2097 /* FIXME: This is a good reason to drop the packet. */
2098 /* Possably, there is a duplicate response. */
2100 retransmit immediatly - race conditions
2101 retransmit after timeout - yes
2103 wait for packet, then exit
2105 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2106 return 0; /* I choose simply exiting. */
2108 if (*result_count
<= 0)
2112 warning (_("RMT ERROR : failed to get remote thread list."));
2115 return result
; /* break; */
2117 if (*result_count
> result_limit
)
2120 warning (_("RMT ERROR: threadlist response longer than requested."));
2126 /* This is the interface between remote and threads, remotes upper
2129 /* remote_find_new_threads retrieves the thread list and for each
2130 thread in the list, looks up the thread in GDB's internal list,
2131 adding the thread if it does not already exist. This involves
2132 getting partial thread lists from the remote target so, polling the
2133 quit_flag is required. */
2136 /* About this many threadisds fit in a packet. */
2138 #define MAXTHREADLISTRESULTS 32
2141 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2144 int done
, i
, result_count
;
2148 static threadref nextthread
;
2149 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
2154 if (loopcount
++ > looplimit
)
2157 warning (_("Remote fetch threadlist -infinite loop-."));
2160 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
2161 &done
, &result_count
, resultthreadlist
))
2166 /* Clear for later iterations. */
2168 /* Setup to resume next batch of thread references, set nextthread. */
2169 if (result_count
>= 1)
2170 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2172 while (result_count
--)
2173 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2180 remote_newthread_step (threadref
*ref
, void *context
)
2182 int pid
= ptid_get_pid (inferior_ptid
);
2183 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2185 if (!in_thread_list (ptid
))
2187 return 1; /* continue iterator */
2190 #define CRAZY_MAX_THREADS 1000
2193 remote_current_thread (ptid_t oldpid
)
2195 struct remote_state
*rs
= get_remote_state ();
2198 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2199 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2200 return read_ptid (&rs
->buf
[2], NULL
);
2205 /* Find new threads for info threads command.
2206 * Original version, using John Metzler's thread protocol.
2210 remote_find_new_threads (void)
2212 remote_threadlist_iterator (remote_newthread_step
, 0,
2217 * Find all threads for info threads command.
2218 * Uses new thread protocol contributed by Cisco.
2219 * Falls back and attempts to use the older method (above)
2220 * if the target doesn't respond to the new method.
2224 remote_threads_info (struct target_ops
*ops
)
2226 struct remote_state
*rs
= get_remote_state ();
2230 if (remote_desc
== 0) /* paranoia */
2231 error (_("Command can only be used when connected to the remote target."));
2233 if (use_threadinfo_query
)
2235 putpkt ("qfThreadInfo");
2236 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2238 if (bufp
[0] != '\0') /* q packet recognized */
2240 while (*bufp
++ == 'm') /* reply contains one or more TID */
2244 new_thread
= read_ptid (bufp
, &bufp
);
2245 if (!ptid_equal (new_thread
, null_ptid
))
2247 /* In non-stop mode, we assume new found threads
2248 are running until proven otherwise with a
2249 stop reply. In all-stop, we can only get
2250 here if all threads are stopped. */
2251 int running
= non_stop
? 1 : 0;
2253 remote_notice_new_inferior (new_thread
, running
);
2256 while (*bufp
++ == ','); /* comma-separated list */
2257 putpkt ("qsThreadInfo");
2258 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2265 /* Only qfThreadInfo is supported in non-stop mode. */
2269 /* Else fall back to old method based on jmetzler protocol. */
2270 use_threadinfo_query
= 0;
2271 remote_find_new_threads ();
2276 * Collect a descriptive string about the given thread.
2277 * The target may say anything it wants to about the thread
2278 * (typically info about its blocked / runnable state, name, etc.).
2279 * This string will appear in the info threads display.
2281 * Optional: targets are not required to implement this function.
2285 remote_threads_extra_info (struct thread_info
*tp
)
2287 struct remote_state
*rs
= get_remote_state ();
2291 struct gdb_ext_thread_info threadinfo
;
2292 static char display_buf
[100]; /* arbitrary... */
2293 int n
= 0; /* position in display_buf */
2295 if (remote_desc
== 0) /* paranoia */
2296 internal_error (__FILE__
, __LINE__
,
2297 _("remote_threads_extra_info"));
2299 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2300 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2301 /* This is the main thread which was added by GDB. The remote
2302 server doesn't know about it. */
2305 if (use_threadextra_query
)
2308 char *endb
= rs
->buf
+ get_remote_packet_size ();
2310 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2312 write_ptid (b
, endb
, tp
->ptid
);
2315 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2316 if (rs
->buf
[0] != 0)
2318 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2319 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2320 display_buf
[result
] = '\0';
2325 /* If the above query fails, fall back to the old method. */
2326 use_threadextra_query
= 0;
2327 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2328 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2329 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2330 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2331 if (threadinfo
.active
)
2333 if (*threadinfo
.shortname
)
2334 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2335 " Name: %s,", threadinfo
.shortname
);
2336 if (*threadinfo
.display
)
2337 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2338 " State: %s,", threadinfo
.display
);
2339 if (*threadinfo
.more_display
)
2340 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2341 " Priority: %s", threadinfo
.more_display
);
2345 /* For purely cosmetic reasons, clear up trailing commas. */
2346 if (',' == display_buf
[n
-1])
2347 display_buf
[n
-1] = ' ';
2355 /* Restart the remote side; this is an extended protocol operation. */
2358 extended_remote_restart (void)
2360 struct remote_state
*rs
= get_remote_state ();
2362 /* Send the restart command; for reasons I don't understand the
2363 remote side really expects a number after the "R". */
2364 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2367 remote_fileio_reset ();
2370 /* Clean up connection to a remote debugger. */
2373 remote_close (int quitting
)
2375 if (remote_desc
== NULL
)
2376 return; /* already closed */
2378 /* Make sure we leave stdin registered in the event loop, and we
2379 don't leave the async SIGINT signal handler installed. */
2380 remote_terminal_ours ();
2382 serial_close (remote_desc
);
2385 /* We don't have a connection to the remote stub anymore. Get rid
2386 of all the inferiors and their threads we were controlling. */
2387 discard_all_inferiors ();
2389 /* We're no longer interested in any of these events. */
2390 discard_pending_stop_replies (-1);
2392 if (remote_async_inferior_event_token
)
2393 delete_async_event_handler (&remote_async_inferior_event_token
);
2394 if (remote_async_get_pending_events_token
)
2395 delete_async_event_handler (&remote_async_get_pending_events_token
);
2398 /* Query the remote side for the text, data and bss offsets. */
2403 struct remote_state
*rs
= get_remote_state ();
2406 int lose
, num_segments
= 0, do_sections
, do_segments
;
2407 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2408 struct section_offsets
*offs
;
2409 struct symfile_segment_data
*data
;
2411 if (symfile_objfile
== NULL
)
2414 putpkt ("qOffsets");
2415 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2418 if (buf
[0] == '\000')
2419 return; /* Return silently. Stub doesn't support
2423 warning (_("Remote failure reply: %s"), buf
);
2427 /* Pick up each field in turn. This used to be done with scanf, but
2428 scanf will make trouble if CORE_ADDR size doesn't match
2429 conversion directives correctly. The following code will work
2430 with any size of CORE_ADDR. */
2431 text_addr
= data_addr
= bss_addr
= 0;
2435 if (strncmp (ptr
, "Text=", 5) == 0)
2438 /* Don't use strtol, could lose on big values. */
2439 while (*ptr
&& *ptr
!= ';')
2440 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2442 if (strncmp (ptr
, ";Data=", 6) == 0)
2445 while (*ptr
&& *ptr
!= ';')
2446 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2451 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2454 while (*ptr
&& *ptr
!= ';')
2455 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2457 if (bss_addr
!= data_addr
)
2458 warning (_("Target reported unsupported offsets: %s"), buf
);
2463 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
2466 /* Don't use strtol, could lose on big values. */
2467 while (*ptr
&& *ptr
!= ';')
2468 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2471 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
2474 while (*ptr
&& *ptr
!= ';')
2475 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2483 error (_("Malformed response to offset query, %s"), buf
);
2484 else if (*ptr
!= '\0')
2485 warning (_("Target reported unsupported offsets: %s"), buf
);
2487 offs
= ((struct section_offsets
*)
2488 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2489 memcpy (offs
, symfile_objfile
->section_offsets
,
2490 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2492 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
2493 do_segments
= (data
!= NULL
);
2494 do_sections
= num_segments
== 0;
2496 if (num_segments
> 0)
2498 segments
[0] = text_addr
;
2499 segments
[1] = data_addr
;
2501 /* If we have two segments, we can still try to relocate everything
2502 by assuming that the .text and .data offsets apply to the whole
2503 text and data segments. Convert the offsets given in the packet
2504 to base addresses for symfile_map_offsets_to_segments. */
2505 else if (data
&& data
->num_segments
== 2)
2507 segments
[0] = data
->segment_bases
[0] + text_addr
;
2508 segments
[1] = data
->segment_bases
[1] + data_addr
;
2511 /* If the object file has only one segment, assume that it is text
2512 rather than data; main programs with no writable data are rare,
2513 but programs with no code are useless. Of course the code might
2514 have ended up in the data segment... to detect that we would need
2515 the permissions here. */
2516 else if (data
&& data
->num_segments
== 1)
2518 segments
[0] = data
->segment_bases
[0] + text_addr
;
2521 /* There's no way to relocate by segment. */
2527 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
2528 offs
, num_segments
, segments
);
2530 if (ret
== 0 && !do_sections
)
2531 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2538 free_symfile_segment_data (data
);
2542 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2544 /* This is a temporary kludge to force data and bss to use the same offsets
2545 because that's what nlmconv does now. The real solution requires changes
2546 to the stub and remote.c that I don't have time to do right now. */
2548 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2549 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2552 objfile_relocate (symfile_objfile
, offs
);
2555 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2556 threads we know are stopped already. This is used during the
2557 initial remote connection in non-stop mode --- threads that are
2558 reported as already being stopped are left stopped. */
2561 set_stop_requested_callback (struct thread_info
*thread
, void *data
)
2563 /* If we have a stop reply for this thread, it must be stopped. */
2564 if (peek_stop_reply (thread
->ptid
))
2565 set_stop_requested (thread
->ptid
, 1);
2570 /* Stub for catch_exception. */
2572 struct start_remote_args
2576 /* The current target. */
2577 struct target_ops
*target
;
2579 /* Non-zero if this is an extended-remote target. */
2584 remote_start_remote (struct ui_out
*uiout
, void *opaque
)
2586 struct start_remote_args
*args
= opaque
;
2587 struct remote_state
*rs
= get_remote_state ();
2588 struct packet_config
*noack_config
;
2589 char *wait_status
= NULL
;
2591 immediate_quit
++; /* Allow user to interrupt it. */
2593 /* Ack any packet which the remote side has already sent. */
2594 serial_write (remote_desc
, "+", 1);
2596 /* The first packet we send to the target is the optional "supported
2597 packets" request. If the target can answer this, it will tell us
2598 which later probes to skip. */
2599 remote_query_supported ();
2601 /* Next, we possibly activate noack mode.
2603 If the QStartNoAckMode packet configuration is set to AUTO,
2604 enable noack mode if the stub reported a wish for it with
2607 If set to TRUE, then enable noack mode even if the stub didn't
2608 report it in qSupported. If the stub doesn't reply OK, the
2609 session ends with an error.
2611 If FALSE, then don't activate noack mode, regardless of what the
2612 stub claimed should be the default with qSupported. */
2614 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
2616 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
2617 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
2618 && noack_config
->support
== PACKET_ENABLE
))
2620 putpkt ("QStartNoAckMode");
2621 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2622 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
2626 if (args
->extended_p
)
2628 /* Tell the remote that we are using the extended protocol. */
2630 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2633 /* Next, if the target can specify a description, read it. We do
2634 this before anything involving memory or registers. */
2635 target_find_description ();
2637 /* On OSs where the list of libraries is global to all
2638 processes, we fetch them early. */
2639 if (gdbarch_has_global_solist (target_gdbarch
))
2640 solib_add (NULL
, args
->from_tty
, args
->target
, auto_solib_add
);
2644 if (!rs
->non_stop_aware
)
2645 error (_("Non-stop mode requested, but remote does not support non-stop"));
2647 putpkt ("QNonStop:1");
2648 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2650 if (strcmp (rs
->buf
, "OK") != 0)
2651 error ("Remote refused setting non-stop mode with: %s", rs
->buf
);
2653 /* Find about threads and processes the stub is already
2654 controlling. We default to adding them in the running state.
2655 The '?' query below will then tell us about which threads are
2657 remote_threads_info (args
->target
);
2659 else if (rs
->non_stop_aware
)
2661 /* Don't assume that the stub can operate in all-stop mode.
2662 Request it explicitely. */
2663 putpkt ("QNonStop:0");
2664 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2666 if (strcmp (rs
->buf
, "OK") != 0)
2667 error ("Remote refused setting all-stop mode with: %s", rs
->buf
);
2670 /* Check whether the target is running now. */
2672 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2676 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
2678 if (!args
->extended_p
)
2679 error (_("The target is not running (try extended-remote?)"));
2681 /* We're connected, but not running. Drop out before we
2682 call start_remote. */
2687 /* Save the reply for later. */
2688 wait_status
= alloca (strlen (rs
->buf
) + 1);
2689 strcpy (wait_status
, rs
->buf
);
2692 /* Let the stub know that we want it to return the thread. */
2693 set_continue_thread (minus_one_ptid
);
2695 /* Without this, some commands which require an active target
2696 (such as kill) won't work. This variable serves (at least)
2697 double duty as both the pid of the target process (if it has
2698 such), and as a flag indicating that a target is active.
2699 These functions should be split out into seperate variables,
2700 especially since GDB will someday have a notion of debugging
2701 several processes. */
2702 inferior_ptid
= magic_null_ptid
;
2704 /* Now, if we have thread information, update inferior_ptid. */
2705 inferior_ptid
= remote_current_thread (inferior_ptid
);
2707 remote_add_inferior (ptid_get_pid (inferior_ptid
), -1);
2709 /* Always add the main thread. */
2710 add_thread_silent (inferior_ptid
);
2712 get_offsets (); /* Get text, data & bss offsets. */
2714 /* If we could not find a description using qXfer, and we know
2715 how to do it some other way, try again. This is not
2716 supported for non-stop; it could be, but it is tricky if
2717 there are no stopped threads when we connect. */
2718 if (remote_read_description_p (args
->target
)
2719 && gdbarch_target_desc (target_gdbarch
) == NULL
)
2721 target_clear_description ();
2722 target_find_description ();
2725 /* Use the previously fetched status. */
2726 gdb_assert (wait_status
!= NULL
);
2727 strcpy (rs
->buf
, wait_status
);
2728 rs
->cached_wait_status
= 1;
2731 start_remote (args
->from_tty
); /* Initialize gdb process mechanisms. */
2735 /* Clear WFI global state. Do this before finding about new
2736 threads and inferiors, and setting the current inferior.
2737 Otherwise we would clear the proceed status of the current
2738 inferior when we want its stop_soon state to be preserved
2739 (see notice_new_inferior). */
2740 init_wait_for_inferior ();
2742 /* In non-stop, we will either get an "OK", meaning that there
2743 are no stopped threads at this time; or, a regular stop
2744 reply. In the latter case, there may be more than one thread
2745 stopped --- we pull them all out using the vStopped
2747 if (strcmp (rs
->buf
, "OK") != 0)
2749 struct stop_reply
*stop_reply
;
2750 struct cleanup
*old_chain
;
2752 stop_reply
= stop_reply_xmalloc ();
2753 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
2755 remote_parse_stop_reply (rs
->buf
, stop_reply
);
2756 discard_cleanups (old_chain
);
2758 /* get_pending_stop_replies acks this one, and gets the rest
2760 pending_stop_reply
= stop_reply
;
2761 remote_get_pending_stop_replies ();
2763 /* Make sure that threads that were stopped remain
2765 iterate_over_threads (set_stop_requested_callback
, NULL
);
2768 if (target_can_async_p ())
2769 target_async (inferior_event_handler
, 0);
2771 if (thread_count () == 0)
2773 if (!args
->extended_p
)
2774 error (_("The target is not running (try extended-remote?)"));
2776 /* We're connected, but not running. Drop out before we
2777 call start_remote. */
2781 /* Let the stub know that we want it to return the thread. */
2783 /* Force the stub to choose a thread. */
2784 set_general_thread (null_ptid
);
2787 inferior_ptid
= remote_current_thread (minus_one_ptid
);
2788 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
2789 error (_("remote didn't report the current thread in non-stop mode"));
2791 get_offsets (); /* Get text, data & bss offsets. */
2793 /* In non-stop mode, any cached wait status will be stored in
2794 the stop reply queue. */
2795 gdb_assert (wait_status
== NULL
);
2798 /* If we connected to a live target, do some additional setup. */
2799 if (target_has_execution
)
2801 if (exec_bfd
) /* No use without an exec file. */
2802 remote_check_symbols (symfile_objfile
);
2805 /* If breakpoints are global, insert them now. */
2806 if (gdbarch_has_global_breakpoints (target_gdbarch
)
2807 && breakpoints_always_inserted_mode ())
2808 insert_breakpoints ();
2811 /* Open a connection to a remote debugger.
2812 NAME is the filename used for communication. */
2815 remote_open (char *name
, int from_tty
)
2817 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2820 /* Open a connection to a remote debugger using the extended
2821 remote gdb protocol. NAME is the filename used for communication. */
2824 extended_remote_open (char *name
, int from_tty
)
2826 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
2829 /* Generic code for opening a connection to a remote target. */
2832 init_all_packet_configs (void)
2835 for (i
= 0; i
< PACKET_MAX
; i
++)
2836 update_packet_config (&remote_protocol_packets
[i
]);
2839 /* Symbol look-up. */
2842 remote_check_symbols (struct objfile
*objfile
)
2844 struct remote_state
*rs
= get_remote_state ();
2845 char *msg
, *reply
, *tmp
;
2846 struct minimal_symbol
*sym
;
2849 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2852 /* Make sure the remote is pointing at the right process. */
2853 set_general_process ();
2855 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2856 because we need both at the same time. */
2857 msg
= alloca (get_remote_packet_size ());
2859 /* Invite target to request symbol lookups. */
2861 putpkt ("qSymbol::");
2862 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2863 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2866 while (strncmp (reply
, "qSymbol:", 8) == 0)
2869 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2871 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2873 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2876 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
2877 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
2879 /* If this is a function address, return the start of code
2880 instead of any data function descriptor. */
2881 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
2885 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2886 phex_nz (sym_addr
, addr_size
), &reply
[8]);
2890 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2895 static struct serial
*
2896 remote_serial_open (char *name
)
2898 static int udp_warning
= 0;
2900 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2901 of in ser-tcp.c, because it is the remote protocol assuming that the
2902 serial connection is reliable and not the serial connection promising
2904 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2907 The remote protocol may be unreliable over UDP.\n\
2908 Some events may be lost, rendering further debugging impossible."));
2912 return serial_open (name
);
2915 /* This type describes each known response to the qSupported
2917 struct protocol_feature
2919 /* The name of this protocol feature. */
2922 /* The default for this protocol feature. */
2923 enum packet_support default_support
;
2925 /* The function to call when this feature is reported, or after
2926 qSupported processing if the feature is not supported.
2927 The first argument points to this structure. The second
2928 argument indicates whether the packet requested support be
2929 enabled, disabled, or probed (or the default, if this function
2930 is being called at the end of processing and this feature was
2931 not reported). The third argument may be NULL; if not NULL, it
2932 is a NUL-terminated string taken from the packet following
2933 this feature's name and an equals sign. */
2934 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2937 /* The corresponding packet for this feature. Only used if
2938 FUNC is remote_supported_packet. */
2943 remote_supported_packet (const struct protocol_feature
*feature
,
2944 enum packet_support support
,
2945 const char *argument
)
2949 warning (_("Remote qSupported response supplied an unexpected value for"
2950 " \"%s\"."), feature
->name
);
2954 if (remote_protocol_packets
[feature
->packet
].support
2955 == PACKET_SUPPORT_UNKNOWN
)
2956 remote_protocol_packets
[feature
->packet
].support
= support
;
2960 remote_packet_size (const struct protocol_feature
*feature
,
2961 enum packet_support support
, const char *value
)
2963 struct remote_state
*rs
= get_remote_state ();
2968 if (support
!= PACKET_ENABLE
)
2971 if (value
== NULL
|| *value
== '\0')
2973 warning (_("Remote target reported \"%s\" without a size."),
2979 packet_size
= strtol (value
, &value_end
, 16);
2980 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2982 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2983 feature
->name
, value
);
2987 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2989 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2990 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2991 packet_size
= MAX_REMOTE_PACKET_SIZE
;
2994 /* Record the new maximum packet size. */
2995 rs
->explicit_packet_size
= packet_size
;
2999 remote_multi_process_feature (const struct protocol_feature
*feature
,
3000 enum packet_support support
, const char *value
)
3002 struct remote_state
*rs
= get_remote_state ();
3003 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
3007 remote_non_stop_feature (const struct protocol_feature
*feature
,
3008 enum packet_support support
, const char *value
)
3010 struct remote_state
*rs
= get_remote_state ();
3011 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
3015 remote_cond_tracepoint_feature (const struct protocol_feature
*feature
,
3016 enum packet_support support
,
3019 struct remote_state
*rs
= get_remote_state ();
3020 rs
->cond_tracepoints
= (support
== PACKET_ENABLE
);
3023 static struct protocol_feature remote_protocol_features
[] = {
3024 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
3025 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
3026 PACKET_qXfer_auxv
},
3027 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
3028 PACKET_qXfer_features
},
3029 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
3030 PACKET_qXfer_libraries
},
3031 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
3032 PACKET_qXfer_memory_map
},
3033 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
3034 PACKET_qXfer_spu_read
},
3035 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
3036 PACKET_qXfer_spu_write
},
3037 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
3038 PACKET_qXfer_osdata
},
3039 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
3040 PACKET_QPassSignals
},
3041 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
3042 PACKET_QStartNoAckMode
},
3043 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
3044 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
3045 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
3046 PACKET_qXfer_siginfo_read
},
3047 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
3048 PACKET_qXfer_siginfo_write
},
3049 { "ConditionalTracepoints", PACKET_DISABLE
, remote_cond_tracepoint_feature
,
3050 PACKET_ConditionalTracepoints
},
3054 remote_query_supported (void)
3056 struct remote_state
*rs
= get_remote_state ();
3059 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3061 /* The packet support flags are handled differently for this packet
3062 than for most others. We treat an error, a disabled packet, and
3063 an empty response identically: any features which must be reported
3064 to be used will be automatically disabled. An empty buffer
3065 accomplishes this, since that is also the representation for a list
3066 containing no features. */
3069 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3072 putpkt ("qSupported:multiprocess+");
3074 putpkt ("qSupported");
3076 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3078 /* If an error occured, warn, but do not return - just reset the
3079 buffer to empty and go on to disable features. */
3080 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3083 warning (_("Remote failure reply: %s"), rs
->buf
);
3088 memset (seen
, 0, sizeof (seen
));
3093 enum packet_support is_supported
;
3094 char *p
, *end
, *name_end
, *value
;
3096 /* First separate out this item from the rest of the packet. If
3097 there's another item after this, we overwrite the separator
3098 (terminated strings are much easier to work with). */
3100 end
= strchr (p
, ';');
3103 end
= p
+ strlen (p
);
3113 warning (_("empty item in \"qSupported\" response"));
3118 name_end
= strchr (p
, '=');
3121 /* This is a name=value entry. */
3122 is_supported
= PACKET_ENABLE
;
3123 value
= name_end
+ 1;
3132 is_supported
= PACKET_ENABLE
;
3136 is_supported
= PACKET_DISABLE
;
3140 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3144 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
3150 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3151 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3153 const struct protocol_feature
*feature
;
3156 feature
= &remote_protocol_features
[i
];
3157 feature
->func (feature
, is_supported
, value
);
3162 /* If we increased the packet size, make sure to increase the global
3163 buffer size also. We delay this until after parsing the entire
3164 qSupported packet, because this is the same buffer we were
3166 if (rs
->buf_size
< rs
->explicit_packet_size
)
3168 rs
->buf_size
= rs
->explicit_packet_size
;
3169 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3172 /* Handle the defaults for unmentioned features. */
3173 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3176 const struct protocol_feature
*feature
;
3178 feature
= &remote_protocol_features
[i
];
3179 feature
->func (feature
, feature
->default_support
, NULL
);
3185 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
, int extended_p
)
3187 struct remote_state
*rs
= get_remote_state ();
3190 error (_("To open a remote debug connection, you need to specify what\n"
3191 "serial device is attached to the remote system\n"
3192 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3194 /* See FIXME above. */
3195 if (!target_async_permitted
)
3196 wait_forever_enabled_p
= 1;
3198 /* If we're connected to a running target, target_preopen will kill it.
3199 But if we're connected to a target system with no running process,
3200 then we will still be connected when it returns. Ask this question
3201 first, before target_preopen has a chance to kill anything. */
3202 if (remote_desc
!= NULL
&& !have_inferiors ())
3205 || query (_("Already connected to a remote target. Disconnect? ")))
3208 error (_("Still connected."));
3211 target_preopen (from_tty
);
3213 unpush_target (target
);
3215 /* This time without a query. If we were connected to an
3216 extended-remote target and target_preopen killed the running
3217 process, we may still be connected. If we are starting "target
3218 remote" now, the extended-remote target will not have been
3219 removed by unpush_target. */
3220 if (remote_desc
!= NULL
&& !have_inferiors ())
3223 /* Make sure we send the passed signals list the next time we resume. */
3224 xfree (last_pass_packet
);
3225 last_pass_packet
= NULL
;
3227 remote_fileio_reset ();
3228 reopen_exec_file ();
3231 remote_desc
= remote_serial_open (name
);
3233 perror_with_name (name
);
3235 if (baud_rate
!= -1)
3237 if (serial_setbaudrate (remote_desc
, baud_rate
))
3239 /* The requested speed could not be set. Error out to
3240 top level after closing remote_desc. Take care to
3241 set remote_desc to NULL to avoid closing remote_desc
3243 serial_close (remote_desc
);
3245 perror_with_name (name
);
3249 serial_raw (remote_desc
);
3251 /* If there is something sitting in the buffer we might take it as a
3252 response to a command, which would be bad. */
3253 serial_flush_input (remote_desc
);
3257 puts_filtered ("Remote debugging using ");
3258 puts_filtered (name
);
3259 puts_filtered ("\n");
3261 push_target (target
); /* Switch to using remote target now. */
3263 /* Register extra event sources in the event loop. */
3264 remote_async_inferior_event_token
3265 = create_async_event_handler (remote_async_inferior_event_handler
,
3267 remote_async_get_pending_events_token
3268 = create_async_event_handler (remote_async_get_pending_events_handler
,
3271 /* Reset the target state; these things will be queried either by
3272 remote_query_supported or as they are needed. */
3273 init_all_packet_configs ();
3274 rs
->cached_wait_status
= 0;
3275 rs
->explicit_packet_size
= 0;
3277 rs
->multi_process_aware
= 0;
3278 rs
->extended
= extended_p
;
3279 rs
->non_stop_aware
= 0;
3280 rs
->waiting_for_stop_reply
= 0;
3282 general_thread
= not_sent_ptid
;
3283 continue_thread
= not_sent_ptid
;
3285 /* Probe for ability to use "ThreadInfo" query, as required. */
3286 use_threadinfo_query
= 1;
3287 use_threadextra_query
= 1;
3289 if (target_async_permitted
)
3291 /* With this target we start out by owning the terminal. */
3292 remote_async_terminal_ours_p
= 1;
3294 /* FIXME: cagney/1999-09-23: During the initial connection it is
3295 assumed that the target is already ready and able to respond to
3296 requests. Unfortunately remote_start_remote() eventually calls
3297 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3298 around this. Eventually a mechanism that allows
3299 wait_for_inferior() to expect/get timeouts will be
3301 wait_forever_enabled_p
= 0;
3304 /* First delete any symbols previously loaded from shared libraries. */
3305 no_shared_libraries (NULL
, 0);
3308 init_thread_list ();
3310 /* Start the remote connection. If error() or QUIT, discard this
3311 target (we'd otherwise be in an inconsistent state) and then
3312 propogate the error on up the exception chain. This ensures that
3313 the caller doesn't stumble along blindly assuming that the
3314 function succeeded. The CLI doesn't have this problem but other
3315 UI's, such as MI do.
3317 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3318 this function should return an error indication letting the
3319 caller restore the previous state. Unfortunately the command
3320 ``target remote'' is directly wired to this function making that
3321 impossible. On a positive note, the CLI side of this problem has
3322 been fixed - the function set_cmd_context() makes it possible for
3323 all the ``target ....'' commands to share a common callback
3324 function. See cli-dump.c. */
3326 struct gdb_exception ex
;
3327 struct start_remote_args args
;
3329 args
.from_tty
= from_tty
;
3330 args
.target
= target
;
3331 args
.extended_p
= extended_p
;
3333 ex
= catch_exception (uiout
, remote_start_remote
, &args
, RETURN_MASK_ALL
);
3336 /* Pop the partially set up target - unless something else did
3337 already before throwing the exception. */
3338 if (remote_desc
!= NULL
)
3340 if (target_async_permitted
)
3341 wait_forever_enabled_p
= 1;
3342 throw_exception (ex
);
3346 if (target_async_permitted
)
3347 wait_forever_enabled_p
= 1;
3350 /* This takes a program previously attached to and detaches it. After
3351 this is done, GDB can be used to debug some other program. We
3352 better not have left any breakpoints in the target program or it'll
3353 die when it hits one. */
3356 remote_detach_1 (char *args
, int from_tty
, int extended
)
3358 int pid
= ptid_get_pid (inferior_ptid
);
3359 struct remote_state
*rs
= get_remote_state ();
3362 error (_("Argument given to \"detach\" when remotely debugging."));
3364 if (!target_has_execution
)
3365 error (_("No process to detach from."));
3367 /* Tell the remote target to detach. */
3368 if (remote_multi_process_p (rs
))
3369 sprintf (rs
->buf
, "D;%x", pid
);
3371 strcpy (rs
->buf
, "D");
3374 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3376 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
3378 else if (rs
->buf
[0] == '\0')
3379 error (_("Remote doesn't know how to detach"));
3381 error (_("Can't detach process."));
3385 if (remote_multi_process_p (rs
))
3386 printf_filtered (_("Detached from remote %s.\n"),
3387 target_pid_to_str (pid_to_ptid (pid
)));
3391 puts_filtered (_("Detached from remote process.\n"));
3393 puts_filtered (_("Ending remote debugging.\n"));
3397 discard_pending_stop_replies (pid
);
3398 target_mourn_inferior ();
3402 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3404 remote_detach_1 (args
, from_tty
, 0);
3408 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3410 remote_detach_1 (args
, from_tty
, 1);
3413 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3416 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
3419 error (_("Argument given to \"disconnect\" when remotely debugging."));
3421 /* Make sure we unpush even the extended remote targets; mourn
3422 won't do it. So call remote_mourn_1 directly instead of
3423 target_mourn_inferior. */
3424 remote_mourn_1 (target
);
3427 puts_filtered ("Ending remote debugging.\n");
3430 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3431 be chatty about it. */
3434 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
3436 struct remote_state
*rs
= get_remote_state ();
3439 char *wait_status
= NULL
;
3442 error_no_arg (_("process-id to attach"));
3445 pid
= strtol (args
, &dummy
, 0);
3446 /* Some targets don't set errno on errors, grrr! */
3447 if (pid
== 0 && args
== dummy
)
3448 error (_("Illegal process-id: %s."), args
);
3450 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3451 error (_("This target does not support attaching to a process"));
3453 sprintf (rs
->buf
, "vAttach;%x", pid
);
3455 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3457 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
3460 printf_unfiltered (_("Attached to %s\n"),
3461 target_pid_to_str (pid_to_ptid (pid
)));
3465 /* Save the reply for later. */
3466 wait_status
= alloca (strlen (rs
->buf
) + 1);
3467 strcpy (wait_status
, rs
->buf
);
3469 else if (strcmp (rs
->buf
, "OK") != 0)
3470 error (_("Attaching to %s failed with: %s"),
3471 target_pid_to_str (pid_to_ptid (pid
)),
3474 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3475 error (_("This target does not support attaching to a process"));
3477 error (_("Attaching to %s failed"),
3478 target_pid_to_str (pid_to_ptid (pid
)));
3480 remote_add_inferior (pid
, 1);
3482 inferior_ptid
= pid_to_ptid (pid
);
3486 struct thread_info
*thread
;
3488 /* Get list of threads. */
3489 remote_threads_info (target
);
3491 thread
= first_thread_of_process (pid
);
3493 inferior_ptid
= thread
->ptid
;
3495 inferior_ptid
= pid_to_ptid (pid
);
3497 /* Invalidate our notion of the remote current thread. */
3498 record_currthread (minus_one_ptid
);
3502 /* Now, if we have thread information, update inferior_ptid. */
3503 inferior_ptid
= remote_current_thread (inferior_ptid
);
3505 /* Add the main thread to the thread list. */
3506 add_thread_silent (inferior_ptid
);
3509 /* Next, if the target can specify a description, read it. We do
3510 this before anything involving memory or registers. */
3511 target_find_description ();
3515 /* Use the previously fetched status. */
3516 gdb_assert (wait_status
!= NULL
);
3518 if (target_can_async_p ())
3520 struct stop_reply
*stop_reply
;
3521 struct cleanup
*old_chain
;
3523 stop_reply
= stop_reply_xmalloc ();
3524 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3525 remote_parse_stop_reply (wait_status
, stop_reply
);
3526 discard_cleanups (old_chain
);
3527 push_stop_reply (stop_reply
);
3529 target_async (inferior_event_handler
, 0);
3533 gdb_assert (wait_status
!= NULL
);
3534 strcpy (rs
->buf
, wait_status
);
3535 rs
->cached_wait_status
= 1;
3539 gdb_assert (wait_status
== NULL
);
3543 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3545 extended_remote_attach_1 (ops
, args
, from_tty
);
3548 /* Convert hex digit A to a number. */
3553 if (a
>= '0' && a
<= '9')
3555 else if (a
>= 'a' && a
<= 'f')
3556 return a
- 'a' + 10;
3557 else if (a
>= 'A' && a
<= 'F')
3558 return a
- 'A' + 10;
3560 error (_("Reply contains invalid hex digit %d"), a
);
3564 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
3568 for (i
= 0; i
< count
; i
++)
3570 if (hex
[0] == 0 || hex
[1] == 0)
3572 /* Hex string is short, or of uneven length.
3573 Return the count that has been converted so far. */
3576 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
3582 /* Convert number NIB to a hex digit. */
3590 return 'a' + nib
- 10;
3594 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
3597 /* May use a length, or a nul-terminated string as input. */
3599 count
= strlen ((char *) bin
);
3601 for (i
= 0; i
< count
; i
++)
3603 *hex
++ = tohex ((*bin
>> 4) & 0xf);
3604 *hex
++ = tohex (*bin
++ & 0xf);
3610 /* Check for the availability of vCont. This function should also check
3614 remote_vcont_probe (struct remote_state
*rs
)
3618 strcpy (rs
->buf
, "vCont?");
3620 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3623 /* Make sure that the features we assume are supported. */
3624 if (strncmp (buf
, "vCont", 5) == 0)
3627 int support_s
, support_S
, support_c
, support_C
;
3633 rs
->support_vCont_t
= 0;
3634 while (p
&& *p
== ';')
3637 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3639 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3641 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3643 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3645 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3646 rs
->support_vCont_t
= 1;
3648 p
= strchr (p
, ';');
3651 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3652 BUF will make packet_ok disable the packet. */
3653 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
3657 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
3660 /* Helper function for building "vCont" resumptions. Write a
3661 resumption to P. ENDP points to one-passed-the-end of the buffer
3662 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
3663 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
3664 resumed thread should be single-stepped and/or signalled. If PTID
3665 equals minus_one_ptid, then all threads are resumed; if PTID
3666 represents a process, then all threads of the process are resumed;
3667 the thread to be stepped and/or signalled is given in the global
3671 append_resumption (char *p
, char *endp
,
3672 ptid_t ptid
, int step
, enum target_signal siggnal
)
3674 struct remote_state
*rs
= get_remote_state ();
3676 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3677 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
3679 p
+= xsnprintf (p
, endp
- p
, ";s");
3680 else if (siggnal
!= TARGET_SIGNAL_0
)
3681 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
3683 p
+= xsnprintf (p
, endp
- p
, ";c");
3685 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
3689 /* All (-1) threads of process. */
3690 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3692 p
+= xsnprintf (p
, endp
- p
, ":");
3693 p
= write_ptid (p
, endp
, nptid
);
3695 else if (!ptid_equal (ptid
, minus_one_ptid
))
3697 p
+= xsnprintf (p
, endp
- p
, ":");
3698 p
= write_ptid (p
, endp
, ptid
);
3704 /* Resume the remote inferior by using a "vCont" packet. The thread
3705 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3706 resumed thread should be single-stepped and/or signalled. If PTID
3707 equals minus_one_ptid, then all threads are resumed; the thread to
3708 be stepped and/or signalled is given in the global INFERIOR_PTID.
3709 This function returns non-zero iff it resumes the inferior.
3711 This function issues a strict subset of all possible vCont commands at the
3715 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
3717 struct remote_state
*rs
= get_remote_state ();
3721 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3722 remote_vcont_probe (rs
);
3724 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
3728 endp
= rs
->buf
+ get_remote_packet_size ();
3730 /* If we could generate a wider range of packets, we'd have to worry
3731 about overflowing BUF. Should there be a generic
3732 "multi-part-packet" packet? */
3734 p
+= xsnprintf (p
, endp
- p
, "vCont");
3736 if (ptid_equal (ptid
, magic_null_ptid
))
3738 /* MAGIC_NULL_PTID means that we don't have any active threads,
3739 so we don't have any TID numbers the inferior will
3740 understand. Make sure to only send forms that do not specify
3742 p
= append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
3744 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
3746 /* Resume all threads (of all processes, or of a single
3747 process), with preference for INFERIOR_PTID. This assumes
3748 inferior_ptid belongs to the set of all threads we are about
3750 if (step
|| siggnal
!= TARGET_SIGNAL_0
)
3752 /* Step inferior_ptid, with or without signal. */
3753 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
3756 /* And continue others without a signal. */
3757 p
= append_resumption (p
, endp
, ptid
, /*step=*/ 0, TARGET_SIGNAL_0
);
3761 /* Scheduler locking; resume only PTID. */
3762 p
= append_resumption (p
, endp
, ptid
, step
, siggnal
);
3765 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
3770 /* In non-stop, the stub replies to vCont with "OK". The stop
3771 reply will be reported asynchronously by means of a `%Stop'
3773 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3774 if (strcmp (rs
->buf
, "OK") != 0)
3775 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
3781 /* Tell the remote machine to resume. */
3783 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
3785 static int last_sent_step
;
3788 remote_resume (struct target_ops
*ops
,
3789 ptid_t ptid
, int step
, enum target_signal siggnal
)
3791 struct remote_state
*rs
= get_remote_state ();
3794 last_sent_signal
= siggnal
;
3795 last_sent_step
= step
;
3797 /* Update the inferior on signals to silently pass, if they've changed. */
3798 remote_pass_signals ();
3800 /* The vCont packet doesn't need to specify threads via Hc. */
3801 if (remote_vcont_resume (ptid
, step
, siggnal
))
3804 /* All other supported resume packets do use Hc, so set the continue
3806 if (ptid_equal (ptid
, minus_one_ptid
))
3807 set_continue_thread (any_thread_ptid
);
3809 set_continue_thread (ptid
);
3812 if (execution_direction
== EXEC_REVERSE
)
3814 /* We don't pass signals to the target in reverse exec mode. */
3815 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
3816 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
3818 strcpy (buf
, step
? "bs" : "bc");
3820 else if (siggnal
!= TARGET_SIGNAL_0
)
3822 buf
[0] = step
? 'S' : 'C';
3823 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
3824 buf
[2] = tohex (((int) siggnal
) & 0xf);
3828 strcpy (buf
, step
? "s" : "c");
3833 /* We are about to start executing the inferior, let's register it
3834 with the event loop. NOTE: this is the one place where all the
3835 execution commands end up. We could alternatively do this in each
3836 of the execution commands in infcmd.c. */
3837 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3838 into infcmd.c in order to allow inferior function calls to work
3839 NOT asynchronously. */
3840 if (target_can_async_p ())
3841 target_async (inferior_event_handler
, 0);
3843 /* We've just told the target to resume. The remote server will
3844 wait for the inferior to stop, and then send a stop reply. In
3845 the mean time, we can't start another command/query ourselves
3846 because the stub wouldn't be ready to process it. This applies
3847 only to the base all-stop protocol, however. In non-stop (which
3848 only supports vCont), the stub replies with an "OK", and is
3849 immediate able to process further serial input. */
3851 rs
->waiting_for_stop_reply
= 1;
3855 /* Set up the signal handler for SIGINT, while the target is
3856 executing, ovewriting the 'regular' SIGINT signal handler. */
3858 initialize_sigint_signal_handler (void)
3860 signal (SIGINT
, handle_remote_sigint
);
3863 /* Signal handler for SIGINT, while the target is executing. */
3865 handle_remote_sigint (int sig
)
3867 signal (sig
, handle_remote_sigint_twice
);
3868 mark_async_signal_handler_wrapper (sigint_remote_token
);
3871 /* Signal handler for SIGINT, installed after SIGINT has already been
3872 sent once. It will take effect the second time that the user sends
3875 handle_remote_sigint_twice (int sig
)
3877 signal (sig
, handle_remote_sigint
);
3878 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
3881 /* Perform the real interruption of the target execution, in response
3884 async_remote_interrupt (gdb_client_data arg
)
3887 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
3889 target_stop (inferior_ptid
);
3892 /* Perform interrupt, if the first attempt did not succeed. Just give
3893 up on the target alltogether. */
3895 async_remote_interrupt_twice (gdb_client_data arg
)
3898 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
3903 /* Reinstall the usual SIGINT handlers, after the target has
3906 cleanup_sigint_signal_handler (void *dummy
)
3908 signal (SIGINT
, handle_sigint
);
3911 /* Send ^C to target to halt it. Target will respond, and send us a
3913 static void (*ofunc
) (int);
3915 /* The command line interface's stop routine. This function is installed
3916 as a signal handler for SIGINT. The first time a user requests a
3917 stop, we call remote_stop to send a break or ^C. If there is no
3918 response from the target (it didn't stop when the user requested it),
3919 we ask the user if he'd like to detach from the target. */
3921 remote_interrupt (int signo
)
3923 /* If this doesn't work, try more severe steps. */
3924 signal (signo
, remote_interrupt_twice
);
3926 gdb_call_async_signal_handler (sigint_remote_token
, 1);
3929 /* The user typed ^C twice. */
3932 remote_interrupt_twice (int signo
)
3934 signal (signo
, ofunc
);
3935 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
3936 signal (signo
, remote_interrupt
);
3939 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
3940 thread, all threads of a remote process, or all threads of all
3944 remote_stop_ns (ptid_t ptid
)
3946 struct remote_state
*rs
= get_remote_state ();
3948 char *endp
= rs
->buf
+ get_remote_packet_size ();
3950 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3951 remote_vcont_probe (rs
);
3953 if (!rs
->support_vCont_t
)
3954 error (_("Remote server does not support stopping threads"));
3956 if (ptid_equal (ptid
, minus_one_ptid
)
3957 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
3958 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
3963 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
3965 if (ptid_is_pid (ptid
))
3966 /* All (-1) threads of process. */
3967 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3970 /* Small optimization: if we already have a stop reply for
3971 this thread, no use in telling the stub we want this
3973 if (peek_stop_reply (ptid
))
3979 p
= write_ptid (p
, endp
, nptid
);
3982 /* In non-stop, we get an immediate OK reply. The stop reply will
3983 come in asynchronously by notification. */
3985 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3986 if (strcmp (rs
->buf
, "OK") != 0)
3987 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
3990 /* All-stop version of target_stop. Sends a break or a ^C to stop the
3991 remote target. It is undefined which thread of which process
3992 reports the stop. */
3995 remote_stop_as (ptid_t ptid
)
3997 struct remote_state
*rs
= get_remote_state ();
3999 /* If the inferior is stopped already, but the core didn't know
4000 about it yet, just ignore the request. The cached wait status
4001 will be collected in remote_wait. */
4002 if (rs
->cached_wait_status
)
4005 /* Send a break or a ^C, depending on user preference. */
4008 serial_send_break (remote_desc
);
4010 serial_write (remote_desc
, "\003", 1);
4013 /* This is the generic stop called via the target vector. When a target
4014 interrupt is requested, either by the command line or the GUI, we
4015 will eventually end up here. */
4018 remote_stop (ptid_t ptid
)
4021 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
4024 remote_stop_ns (ptid
);
4026 remote_stop_as (ptid
);
4029 /* Ask the user what to do when an interrupt is received. */
4032 interrupt_query (void)
4034 target_terminal_ours ();
4036 if (target_can_async_p ())
4038 signal (SIGINT
, handle_sigint
);
4039 deprecated_throw_reason (RETURN_QUIT
);
4043 if (query (_("Interrupted while waiting for the program.\n\
4044 Give up (and stop debugging it)? ")))
4047 deprecated_throw_reason (RETURN_QUIT
);
4051 target_terminal_inferior ();
4054 /* Enable/disable target terminal ownership. Most targets can use
4055 terminal groups to control terminal ownership. Remote targets are
4056 different in that explicit transfer of ownership to/from GDB/target
4060 remote_terminal_inferior (void)
4062 if (!target_async_permitted
)
4063 /* Nothing to do. */
4066 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4067 idempotent. The event-loop GDB talking to an asynchronous target
4068 with a synchronous command calls this function from both
4069 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4070 transfer the terminal to the target when it shouldn't this guard
4072 if (!remote_async_terminal_ours_p
)
4074 delete_file_handler (input_fd
);
4075 remote_async_terminal_ours_p
= 0;
4076 initialize_sigint_signal_handler ();
4077 /* NOTE: At this point we could also register our selves as the
4078 recipient of all input. Any characters typed could then be
4079 passed on down to the target. */
4083 remote_terminal_ours (void)
4085 if (!target_async_permitted
)
4086 /* Nothing to do. */
4089 /* See FIXME in remote_terminal_inferior. */
4090 if (remote_async_terminal_ours_p
)
4092 cleanup_sigint_signal_handler (NULL
);
4093 add_file_handler (input_fd
, stdin_event_handler
, 0);
4094 remote_async_terminal_ours_p
= 1;
4098 remote_console_output (char *msg
)
4102 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4105 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4108 fputs_unfiltered (tb
, gdb_stdtarg
);
4110 gdb_flush (gdb_stdtarg
);
4113 typedef struct cached_reg
4116 gdb_byte data
[MAX_REGISTER_SIZE
];
4119 DEF_VEC_O(cached_reg_t
);
4123 struct stop_reply
*next
;
4127 struct target_waitstatus ws
;
4129 VEC(cached_reg_t
) *regcache
;
4131 int stopped_by_watchpoint_p
;
4132 CORE_ADDR watch_data_address
;
4138 /* The list of already fetched and acknowledged stop events. */
4139 static struct stop_reply
*stop_reply_queue
;
4141 static struct stop_reply
*
4142 stop_reply_xmalloc (void)
4144 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4150 stop_reply_xfree (struct stop_reply
*r
)
4154 VEC_free (cached_reg_t
, r
->regcache
);
4159 /* Discard all pending stop replies of inferior PID. If PID is -1,
4160 discard everything. */
4163 discard_pending_stop_replies (int pid
)
4165 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4167 /* Discard the in-flight notification. */
4168 if (pending_stop_reply
!= NULL
4170 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4172 stop_reply_xfree (pending_stop_reply
);
4173 pending_stop_reply
= NULL
;
4176 /* Discard the stop replies we have already pulled with
4178 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4182 || ptid_get_pid (reply
->ptid
) == pid
)
4184 if (reply
== stop_reply_queue
)
4185 stop_reply_queue
= reply
->next
;
4187 prev
->next
= reply
->next
;
4189 stop_reply_xfree (reply
);
4196 /* Cleanup wrapper. */
4199 do_stop_reply_xfree (void *arg
)
4201 struct stop_reply
*r
= arg
;
4202 stop_reply_xfree (r
);
4205 /* Look for a queued stop reply belonging to PTID. If one is found,
4206 remove it from the queue, and return it. Returns NULL if none is
4207 found. If there are still queued events left to process, tell the
4208 event loop to get back to target_wait soon. */
4210 static struct stop_reply
*
4211 queued_stop_reply (ptid_t ptid
)
4213 struct stop_reply
*it
, *prev
;
4214 struct stop_reply head
;
4216 head
.next
= stop_reply_queue
;
4221 if (!ptid_equal (ptid
, minus_one_ptid
))
4222 for (; it
; prev
= it
, it
= it
->next
)
4223 if (ptid_equal (ptid
, it
->ptid
))
4228 prev
->next
= it
->next
;
4232 stop_reply_queue
= head
.next
;
4234 if (stop_reply_queue
)
4235 /* There's still at least an event left. */
4236 mark_async_event_handler (remote_async_inferior_event_token
);
4241 /* Push a fully parsed stop reply in the stop reply queue. Since we
4242 know that we now have at least one queued event left to pass to the
4243 core side, tell the event loop to get back to target_wait soon. */
4246 push_stop_reply (struct stop_reply
*new_event
)
4248 struct stop_reply
*event
;
4250 if (stop_reply_queue
)
4252 for (event
= stop_reply_queue
;
4253 event
&& event
->next
;
4254 event
= event
->next
)
4257 event
->next
= new_event
;
4260 stop_reply_queue
= new_event
;
4262 mark_async_event_handler (remote_async_inferior_event_token
);
4265 /* Returns true if we have a stop reply for PTID. */
4268 peek_stop_reply (ptid_t ptid
)
4270 struct stop_reply
*it
;
4272 for (it
= stop_reply_queue
; it
; it
= it
->next
)
4273 if (ptid_equal (ptid
, it
->ptid
))
4275 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
4282 /* Parse the stop reply in BUF. Either the function succeeds, and the
4283 result is stored in EVENT, or throws an error. */
4286 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
4288 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4292 event
->ptid
= null_ptid
;
4293 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
4294 event
->ws
.value
.integer
= 0;
4295 event
->solibs_changed
= 0;
4296 event
->replay_event
= 0;
4297 event
->stopped_by_watchpoint_p
= 0;
4298 event
->regcache
= NULL
;
4302 case 'T': /* Status with PC, SP, FP, ... */
4303 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4304 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4306 n... = register number
4307 r... = register contents
4310 p
= &buf
[3]; /* after Txx */
4318 /* If the packet contains a register number, save it in
4319 pnum and set p1 to point to the character following it.
4320 Otherwise p1 points to p. */
4322 /* If this packet is an awatch packet, don't parse the 'a'
4323 as a register number. */
4325 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
4327 /* Read the ``P'' register number. */
4328 pnum
= strtol (p
, &p_temp
, 16);
4334 if (p1
== p
) /* No register number present here. */
4336 p1
= strchr (p
, ':');
4338 error (_("Malformed packet(a) (missing colon): %s\n\
4341 if (strncmp (p
, "thread", p1
- p
) == 0)
4342 event
->ptid
= read_ptid (++p1
, &p
);
4343 else if ((strncmp (p
, "watch", p1
- p
) == 0)
4344 || (strncmp (p
, "rwatch", p1
- p
) == 0)
4345 || (strncmp (p
, "awatch", p1
- p
) == 0))
4347 event
->stopped_by_watchpoint_p
= 1;
4348 p
= unpack_varlen_hex (++p1
, &addr
);
4349 event
->watch_data_address
= (CORE_ADDR
) addr
;
4351 else if (strncmp (p
, "library", p1
- p
) == 0)
4355 while (*p_temp
&& *p_temp
!= ';')
4358 event
->solibs_changed
= 1;
4361 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
4363 /* NO_HISTORY event.
4364 p1 will indicate "begin" or "end", but
4365 it makes no difference for now, so ignore it. */
4366 event
->replay_event
= 1;
4367 p_temp
= strchr (p1
+ 1, ';');
4373 /* Silently skip unknown optional info. */
4374 p_temp
= strchr (p1
+ 1, ';');
4381 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
4382 cached_reg_t cached_reg
;
4387 error (_("Malformed packet(b) (missing colon): %s\n\
4393 error (_("Remote sent bad register number %s: %s\n\
4395 phex_nz (pnum
, 0), p
, buf
);
4397 cached_reg
.num
= reg
->regnum
;
4399 fieldsize
= hex2bin (p
, cached_reg
.data
,
4400 register_size (target_gdbarch
,
4403 if (fieldsize
< register_size (target_gdbarch
,
4405 warning (_("Remote reply is too short: %s"), buf
);
4407 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
4411 error (_("Remote register badly formatted: %s\nhere: %s"),
4416 case 'S': /* Old style status, just signal only. */
4417 if (event
->solibs_changed
)
4418 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
4419 else if (event
->replay_event
)
4420 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
4423 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
4424 event
->ws
.value
.sig
= (enum target_signal
)
4425 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
4428 case 'W': /* Target exited. */
4435 /* GDB used to accept only 2 hex chars here. Stubs should
4436 only send more if they detect GDB supports multi-process
4438 p
= unpack_varlen_hex (&buf
[1], &value
);
4442 /* The remote process exited. */
4443 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
4444 event
->ws
.value
.integer
= value
;
4448 /* The remote process exited with a signal. */
4449 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
4450 event
->ws
.value
.sig
= (enum target_signal
) value
;
4453 /* If no process is specified, assume inferior_ptid. */
4454 pid
= ptid_get_pid (inferior_ptid
);
4463 else if (strncmp (p
,
4464 "process:", sizeof ("process:") - 1) == 0)
4467 p
+= sizeof ("process:") - 1;
4468 unpack_varlen_hex (p
, &upid
);
4472 error (_("unknown stop reply packet: %s"), buf
);
4475 error (_("unknown stop reply packet: %s"), buf
);
4476 event
->ptid
= pid_to_ptid (pid
);
4481 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
4482 error (_("No process or thread specified in stop reply: %s"), buf
);
4485 /* When the stub wants to tell GDB about a new stop reply, it sends a
4486 stop notification (%Stop). Those can come it at any time, hence,
4487 we have to make sure that any pending putpkt/getpkt sequence we're
4488 making is finished, before querying the stub for more events with
4489 vStopped. E.g., if we started a vStopped sequence immediatelly
4490 upon receiving the %Stop notification, something like this could
4498 1.6) <-- (registers reply to step #1.3)
4500 Obviously, the reply in step #1.6 would be unexpected to a vStopped
4503 To solve this, whenever we parse a %Stop notification sucessfully,
4504 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
4505 doing whatever we were doing:
4511 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
4512 2.5) <-- (registers reply to step #2.3)
4514 Eventualy after step #2.5, we return to the event loop, which
4515 notices there's an event on the
4516 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
4517 associated callback --- the function below. At this point, we're
4518 always safe to start a vStopped sequence. :
4521 2.7) <-- T05 thread:2
4527 remote_get_pending_stop_replies (void)
4529 struct remote_state
*rs
= get_remote_state ();
4531 if (pending_stop_reply
)
4534 putpkt ("vStopped");
4536 /* Now we can rely on it. */
4537 push_stop_reply (pending_stop_reply
);
4538 pending_stop_reply
= NULL
;
4542 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4543 if (strcmp (rs
->buf
, "OK") == 0)
4547 struct cleanup
*old_chain
;
4548 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
4550 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4551 remote_parse_stop_reply (rs
->buf
, stop_reply
);
4554 putpkt ("vStopped");
4556 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
4558 /* Now we can rely on it. */
4559 discard_cleanups (old_chain
);
4560 push_stop_reply (stop_reply
);
4563 /* We got an unknown stop reply. */
4564 do_cleanups (old_chain
);
4571 /* Called when it is decided that STOP_REPLY holds the info of the
4572 event that is to be returned to the core. This function always
4573 destroys STOP_REPLY. */
4576 process_stop_reply (struct stop_reply
*stop_reply
,
4577 struct target_waitstatus
*status
)
4581 *status
= stop_reply
->ws
;
4582 ptid
= stop_reply
->ptid
;
4584 /* If no thread/process was reported by the stub, assume the current
4586 if (ptid_equal (ptid
, null_ptid
))
4587 ptid
= inferior_ptid
;
4589 if (status
->kind
!= TARGET_WAITKIND_EXITED
4590 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4592 /* Expedited registers. */
4593 if (stop_reply
->regcache
)
4595 struct regcache
*regcache
4596 = get_thread_arch_regcache (ptid
, target_gdbarch
);
4601 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
4603 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
4604 VEC_free (cached_reg_t
, stop_reply
->regcache
);
4607 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
4608 remote_watch_data_address
= stop_reply
->watch_data_address
;
4610 remote_notice_new_inferior (ptid
, 0);
4613 stop_reply_xfree (stop_reply
);
4617 /* The non-stop mode version of target_wait. */
4620 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4622 struct remote_state
*rs
= get_remote_state ();
4623 struct stop_reply
*stop_reply
;
4626 /* If in non-stop mode, get out of getpkt even if a
4627 notification is received. */
4629 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4636 case 'E': /* Error of some sort. */
4637 /* We're out of sync with the target now. Did it continue
4638 or not? We can't tell which thread it was in non-stop,
4639 so just ignore this. */
4640 warning (_("Remote failure reply: %s"), rs
->buf
);
4642 case 'O': /* Console output. */
4643 remote_console_output (rs
->buf
+ 1);
4646 warning (_("Invalid remote reply: %s"), rs
->buf
);
4650 /* Acknowledge a pending stop reply that may have arrived in the
4652 if (pending_stop_reply
!= NULL
)
4653 remote_get_pending_stop_replies ();
4655 /* If indeed we noticed a stop reply, we're done. */
4656 stop_reply
= queued_stop_reply (ptid
);
4657 if (stop_reply
!= NULL
)
4658 return process_stop_reply (stop_reply
, status
);
4660 /* Still no event. If we're just polling for an event, then
4661 return to the event loop. */
4662 if (options
& TARGET_WNOHANG
)
4664 status
->kind
= TARGET_WAITKIND_IGNORE
;
4665 return minus_one_ptid
;
4668 /* Otherwise do a blocking wait. */
4669 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4674 /* Wait until the remote machine stops, then return, storing status in
4675 STATUS just as `wait' would. */
4678 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4680 struct remote_state
*rs
= get_remote_state ();
4681 ptid_t event_ptid
= null_ptid
;
4683 struct stop_reply
*stop_reply
;
4687 status
->kind
= TARGET_WAITKIND_IGNORE
;
4688 status
->value
.integer
= 0;
4690 stop_reply
= queued_stop_reply (ptid
);
4691 if (stop_reply
!= NULL
)
4692 return process_stop_reply (stop_reply
, status
);
4694 if (rs
->cached_wait_status
)
4695 /* Use the cached wait status, but only once. */
4696 rs
->cached_wait_status
= 0;
4701 if (!target_is_async_p ())
4703 ofunc
= signal (SIGINT
, remote_interrupt
);
4704 /* If the user hit C-c before this packet, or between packets,
4705 pretend that it was hit right here. */
4709 remote_interrupt (SIGINT
);
4713 /* FIXME: cagney/1999-09-27: If we're in async mode we should
4714 _never_ wait for ever -> test on target_is_async_p().
4715 However, before we do that we need to ensure that the caller
4716 knows how to take the target into/out of async mode. */
4717 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
4718 if (!target_is_async_p ())
4719 signal (SIGINT
, ofunc
);
4724 remote_stopped_by_watchpoint_p
= 0;
4726 /* We got something. */
4727 rs
->waiting_for_stop_reply
= 0;
4731 case 'E': /* Error of some sort. */
4732 /* We're out of sync with the target now. Did it continue or
4733 not? Not is more likely, so report a stop. */
4734 warning (_("Remote failure reply: %s"), buf
);
4735 status
->kind
= TARGET_WAITKIND_STOPPED
;
4736 status
->value
.sig
= TARGET_SIGNAL_0
;
4738 case 'F': /* File-I/O request. */
4739 remote_fileio_request (buf
);
4741 case 'T': case 'S': case 'X': case 'W':
4743 struct stop_reply
*stop_reply
;
4744 struct cleanup
*old_chain
;
4746 stop_reply
= stop_reply_xmalloc ();
4747 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4748 remote_parse_stop_reply (buf
, stop_reply
);
4749 discard_cleanups (old_chain
);
4750 event_ptid
= process_stop_reply (stop_reply
, status
);
4753 case 'O': /* Console output. */
4754 remote_console_output (buf
+ 1);
4756 /* The target didn't really stop; keep waiting. */
4757 rs
->waiting_for_stop_reply
= 1;
4761 if (last_sent_signal
!= TARGET_SIGNAL_0
)
4763 /* Zero length reply means that we tried 'S' or 'C' and the
4764 remote system doesn't support it. */
4765 target_terminal_ours_for_output ();
4767 ("Can't send signals to this remote system. %s not sent.\n",
4768 target_signal_to_name (last_sent_signal
));
4769 last_sent_signal
= TARGET_SIGNAL_0
;
4770 target_terminal_inferior ();
4772 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
4773 putpkt ((char *) buf
);
4775 /* We just told the target to resume, so a stop reply is in
4777 rs
->waiting_for_stop_reply
= 1;
4780 /* else fallthrough */
4782 warning (_("Invalid remote reply: %s"), buf
);
4784 rs
->waiting_for_stop_reply
= 1;
4788 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
4790 /* Nothing interesting happened. If we're doing a non-blocking
4791 poll, we're done. Otherwise, go back to waiting. */
4792 if (options
& TARGET_WNOHANG
)
4793 return minus_one_ptid
;
4797 else if (status
->kind
!= TARGET_WAITKIND_EXITED
4798 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4800 if (!ptid_equal (event_ptid
, null_ptid
))
4801 record_currthread (event_ptid
);
4803 event_ptid
= inferior_ptid
;
4806 /* A process exit. Invalidate our notion of current thread. */
4807 record_currthread (minus_one_ptid
);
4812 /* Wait until the remote machine stops, then return, storing status in
4813 STATUS just as `wait' would. */
4816 remote_wait (struct target_ops
*ops
,
4817 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4822 event_ptid
= remote_wait_ns (ptid
, status
, options
);
4824 event_ptid
= remote_wait_as (ptid
, status
, options
);
4826 if (target_can_async_p ())
4828 /* If there are are events left in the queue tell the event loop
4830 if (stop_reply_queue
)
4831 mark_async_event_handler (remote_async_inferior_event_token
);
4837 /* Fetch a single register using a 'p' packet. */
4840 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
4842 struct remote_state
*rs
= get_remote_state ();
4844 char regp
[MAX_REGISTER_SIZE
];
4847 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
4850 if (reg
->pnum
== -1)
4855 p
+= hexnumstr (p
, reg
->pnum
);
4858 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4862 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
4866 case PACKET_UNKNOWN
:
4869 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
4870 gdbarch_register_name (get_regcache_arch (regcache
),
4875 /* If this register is unfetchable, tell the regcache. */
4878 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
4882 /* Otherwise, parse and supply the value. */
4888 error (_("fetch_register_using_p: early buf termination"));
4890 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4893 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
4897 /* Fetch the registers included in the target's 'g' packet. */
4900 send_g_packet (void)
4902 struct remote_state
*rs
= get_remote_state ();
4905 sprintf (rs
->buf
, "g");
4906 remote_send (&rs
->buf
, &rs
->buf_size
);
4908 /* We can get out of synch in various cases. If the first character
4909 in the buffer is not a hex character, assume that has happened
4910 and try to fetch another packet to read. */
4911 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
4912 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
4913 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
4914 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
4917 fprintf_unfiltered (gdb_stdlog
,
4918 "Bad register packet; fetching a new packet\n");
4919 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4922 buf_len
= strlen (rs
->buf
);
4924 /* Sanity check the received packet. */
4925 if (buf_len
% 2 != 0)
4926 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
4932 process_g_packet (struct regcache
*regcache
)
4934 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
4935 struct remote_state
*rs
= get_remote_state ();
4936 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4941 buf_len
= strlen (rs
->buf
);
4943 /* Further sanity checks, with knowledge of the architecture. */
4944 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
4945 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
4947 /* Save the size of the packet sent to us by the target. It is used
4948 as a heuristic when determining the max size of packets that the
4949 target can safely receive. */
4950 if (rsa
->actual_register_packet_size
== 0)
4951 rsa
->actual_register_packet_size
= buf_len
;
4953 /* If this is smaller than we guessed the 'g' packet would be,
4954 update our records. A 'g' reply that doesn't include a register's
4955 value implies either that the register is not available, or that
4956 the 'p' packet must be used. */
4957 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
4959 rsa
->sizeof_g_packet
= buf_len
/ 2;
4961 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4963 if (rsa
->regs
[i
].pnum
== -1)
4966 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
4967 rsa
->regs
[i
].in_g_packet
= 0;
4969 rsa
->regs
[i
].in_g_packet
= 1;
4973 regs
= alloca (rsa
->sizeof_g_packet
);
4975 /* Unimplemented registers read as all bits zero. */
4976 memset (regs
, 0, rsa
->sizeof_g_packet
);
4978 /* Reply describes registers byte by byte, each byte encoded as two
4979 hex characters. Suck them all up, then supply them to the
4980 register cacheing/storage mechanism. */
4983 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
4985 if (p
[0] == 0 || p
[1] == 0)
4986 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4987 internal_error (__FILE__
, __LINE__
,
4988 "unexpected end of 'g' packet reply");
4990 if (p
[0] == 'x' && p
[1] == 'x')
4991 regs
[i
] = 0; /* 'x' */
4993 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4999 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5001 struct packet_reg
*r
= &rsa
->regs
[i
];
5004 if (r
->offset
* 2 >= strlen (rs
->buf
))
5005 /* This shouldn't happen - we adjusted in_g_packet above. */
5006 internal_error (__FILE__
, __LINE__
,
5007 "unexpected end of 'g' packet reply");
5008 else if (rs
->buf
[r
->offset
* 2] == 'x')
5010 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5011 /* The register isn't available, mark it as such (at
5012 the same time setting the value to zero). */
5013 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5016 regcache_raw_supply (regcache
, r
->regnum
,
5024 fetch_registers_using_g (struct regcache
*regcache
)
5027 process_g_packet (regcache
);
5031 remote_fetch_registers (struct target_ops
*ops
,
5032 struct regcache
*regcache
, int regnum
)
5034 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5037 set_general_thread (inferior_ptid
);
5041 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5042 gdb_assert (reg
!= NULL
);
5044 /* If this register might be in the 'g' packet, try that first -
5045 we are likely to read more than one register. If this is the
5046 first 'g' packet, we might be overly optimistic about its
5047 contents, so fall back to 'p'. */
5048 if (reg
->in_g_packet
)
5050 fetch_registers_using_g (regcache
);
5051 if (reg
->in_g_packet
)
5055 if (fetch_register_using_p (regcache
, reg
))
5058 /* This register is not available. */
5059 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5064 fetch_registers_using_g (regcache
);
5066 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5067 if (!rsa
->regs
[i
].in_g_packet
)
5068 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5070 /* This register is not available. */
5071 regcache_raw_supply (regcache
, i
, NULL
);
5075 /* Prepare to store registers. Since we may send them all (using a
5076 'G' request), we have to read out the ones we don't want to change
5080 remote_prepare_to_store (struct regcache
*regcache
)
5082 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5084 gdb_byte buf
[MAX_REGISTER_SIZE
];
5086 /* Make sure the entire registers array is valid. */
5087 switch (remote_protocol_packets
[PACKET_P
].support
)
5089 case PACKET_DISABLE
:
5090 case PACKET_SUPPORT_UNKNOWN
:
5091 /* Make sure all the necessary registers are cached. */
5092 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5093 if (rsa
->regs
[i
].in_g_packet
)
5094 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5101 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5102 packet was not recognized. */
5105 store_register_using_P (const struct regcache
*regcache
,
5106 struct packet_reg
*reg
)
5108 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5109 struct remote_state
*rs
= get_remote_state ();
5110 /* Try storing a single register. */
5111 char *buf
= rs
->buf
;
5112 gdb_byte regp
[MAX_REGISTER_SIZE
];
5115 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5118 if (reg
->pnum
== -1)
5121 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5122 p
= buf
+ strlen (buf
);
5123 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5124 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5126 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5128 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5133 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5134 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
5135 case PACKET_UNKNOWN
:
5138 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5142 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5143 contents of the register cache buffer. FIXME: ignores errors. */
5146 store_registers_using_G (const struct regcache
*regcache
)
5148 struct remote_state
*rs
= get_remote_state ();
5149 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5153 /* Extract all the registers in the regcache copying them into a
5157 regs
= alloca (rsa
->sizeof_g_packet
);
5158 memset (regs
, 0, rsa
->sizeof_g_packet
);
5159 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5161 struct packet_reg
*r
= &rsa
->regs
[i
];
5163 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5167 /* Command describes registers byte by byte,
5168 each byte encoded as two hex characters. */
5171 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5173 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5175 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5176 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
5177 error (_("Could not write registers; remote failure reply '%s'"),
5181 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5182 of the register cache buffer. FIXME: ignores errors. */
5185 remote_store_registers (struct target_ops
*ops
,
5186 struct regcache
*regcache
, int regnum
)
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 ();
6680 /* If the user has disabled vRun support, or we have detected that
6681 support is not available, do not try it. */
6682 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6685 strcpy (rs
->buf
, "vRun;");
6686 len
= strlen (rs
->buf
);
6688 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
6689 error (_("Remote file name too long for run packet"));
6690 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
6692 gdb_assert (args
!= NULL
);
6695 struct cleanup
*back_to
;
6699 argv
= gdb_buildargv (args
);
6700 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
6701 for (i
= 0; argv
[i
] != NULL
; i
++)
6703 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
6704 error (_("Argument list too long for run packet"));
6705 rs
->buf
[len
++] = ';';
6706 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
6708 do_cleanups (back_to
);
6711 rs
->buf
[len
++] = '\0';
6714 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6716 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
6718 /* We have a wait response; we don't need it, though. All is well. */
6721 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6722 /* It wasn't disabled before, but it is now. */
6726 if (remote_exec_file
[0] == '\0')
6727 error (_("Running the default executable on the remote target failed; "
6728 "try \"set remote exec-file\"?"));
6730 error (_("Running \"%s\" on the remote target failed"),
6735 /* In the extended protocol we want to be able to do things like
6736 "run" and have them basically work as expected. So we need
6737 a special create_inferior function. We support changing the
6738 executable file and the command line arguments, but not the
6742 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
6743 char **env
, int from_tty
)
6745 /* If running asynchronously, register the target file descriptor
6746 with the event loop. */
6747 if (target_can_async_p ())
6748 target_async (inferior_event_handler
, 0);
6750 /* Now restart the remote server. */
6751 if (extended_remote_run (args
) == -1)
6753 /* vRun was not supported. Fail if we need it to do what the
6755 if (remote_exec_file
[0])
6756 error (_("Remote target does not support \"set remote exec-file\""));
6758 error (_("Remote target does not support \"set args\" or run <ARGS>"));
6760 /* Fall back to "R". */
6761 extended_remote_restart ();
6764 /* Clean up from the last time we ran, before we mark the target
6765 running again. This will mark breakpoints uninserted, and
6766 get_offsets may insert breakpoints. */
6767 init_thread_list ();
6768 init_wait_for_inferior ();
6770 /* Now mark the inferior as running before we do anything else. */
6771 inferior_ptid
= magic_null_ptid
;
6773 /* Now, if we have thread information, update inferior_ptid. */
6774 inferior_ptid
= remote_current_thread (inferior_ptid
);
6776 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
6777 add_thread_silent (inferior_ptid
);
6779 /* Get updated offsets, if the stub uses qOffsets. */
6784 extended_remote_create_inferior (struct target_ops
*ops
,
6785 char *exec_file
, char *args
,
6786 char **env
, int from_tty
)
6788 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
6792 /* Insert a breakpoint. On targets that have software breakpoint
6793 support, we ask the remote target to do the work; on targets
6794 which don't, we insert a traditional memory breakpoint. */
6797 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
6798 struct bp_target_info
*bp_tgt
)
6800 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
6801 If it succeeds, then set the support to PACKET_ENABLE. If it
6802 fails, and the user has explicitly requested the Z support then
6803 report an error, otherwise, mark it disabled and go on. */
6805 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6807 CORE_ADDR addr
= bp_tgt
->placed_address
;
6808 struct remote_state
*rs
;
6812 gdbarch_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
6814 rs
= get_remote_state ();
6820 addr
= (ULONGEST
) remote_address_masked (addr
);
6821 p
+= hexnumstr (p
, addr
);
6822 sprintf (p
, ",%d", bpsize
);
6825 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6827 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
6832 bp_tgt
->placed_address
= addr
;
6833 bp_tgt
->placed_size
= bpsize
;
6835 case PACKET_UNKNOWN
:
6840 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
6844 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
6845 struct bp_target_info
*bp_tgt
)
6847 CORE_ADDR addr
= bp_tgt
->placed_address
;
6848 struct remote_state
*rs
= get_remote_state ();
6850 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6858 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
6859 p
+= hexnumstr (p
, addr
);
6860 sprintf (p
, ",%d", bp_tgt
->placed_size
);
6863 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6865 return (rs
->buf
[0] == 'E');
6868 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
6872 watchpoint_to_Z_packet (int type
)
6877 return Z_PACKET_WRITE_WP
;
6880 return Z_PACKET_READ_WP
;
6883 return Z_PACKET_ACCESS_WP
;
6886 internal_error (__FILE__
, __LINE__
,
6887 _("hw_bp_to_z: bad watchpoint type %d"), type
);
6892 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
6894 struct remote_state
*rs
= get_remote_state ();
6896 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6898 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6901 sprintf (rs
->buf
, "Z%x,", packet
);
6902 p
= strchr (rs
->buf
, '\0');
6903 addr
= remote_address_masked (addr
);
6904 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6905 sprintf (p
, ",%x", len
);
6908 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6910 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6913 case PACKET_UNKNOWN
:
6918 internal_error (__FILE__
, __LINE__
,
6919 _("remote_insert_watchpoint: reached end of function"));
6924 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
6926 struct remote_state
*rs
= get_remote_state ();
6928 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6930 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6933 sprintf (rs
->buf
, "z%x,", packet
);
6934 p
= strchr (rs
->buf
, '\0');
6935 addr
= remote_address_masked (addr
);
6936 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6937 sprintf (p
, ",%x", len
);
6939 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6941 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6944 case PACKET_UNKNOWN
:
6949 internal_error (__FILE__
, __LINE__
,
6950 _("remote_remove_watchpoint: reached end of function"));
6954 int remote_hw_watchpoint_limit
= -1;
6955 int remote_hw_breakpoint_limit
= -1;
6958 remote_check_watch_resources (int type
, int cnt
, int ot
)
6960 if (type
== bp_hardware_breakpoint
)
6962 if (remote_hw_breakpoint_limit
== 0)
6964 else if (remote_hw_breakpoint_limit
< 0)
6966 else if (cnt
<= remote_hw_breakpoint_limit
)
6971 if (remote_hw_watchpoint_limit
== 0)
6973 else if (remote_hw_watchpoint_limit
< 0)
6977 else if (cnt
<= remote_hw_watchpoint_limit
)
6984 remote_stopped_by_watchpoint (void)
6986 return remote_stopped_by_watchpoint_p
;
6990 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
6993 if (remote_stopped_by_watchpoint ())
6995 *addr_p
= remote_watch_data_address
;
7004 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7005 struct bp_target_info
*bp_tgt
)
7008 struct remote_state
*rs
;
7011 /* The length field should be set to the size of a breakpoint
7012 instruction, even though we aren't inserting one ourselves. */
7014 gdbarch_breakpoint_from_pc
7015 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7017 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7020 rs
= get_remote_state ();
7027 addr
= remote_address_masked (bp_tgt
->placed_address
);
7028 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7029 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7032 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7034 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7037 case PACKET_UNKNOWN
:
7042 internal_error (__FILE__
, __LINE__
,
7043 _("remote_insert_hw_breakpoint: reached end of function"));
7048 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7049 struct bp_target_info
*bp_tgt
)
7052 struct remote_state
*rs
= get_remote_state ();
7055 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7062 addr
= remote_address_masked (bp_tgt
->placed_address
);
7063 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7064 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7067 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7069 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7072 case PACKET_UNKNOWN
:
7077 internal_error (__FILE__
, __LINE__
,
7078 _("remote_remove_hw_breakpoint: reached end of function"));
7081 /* Table used by the crc32 function to calcuate the checksum. */
7083 static unsigned long crc32_table
[256] =
7086 static unsigned long
7087 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
7089 if (!crc32_table
[1])
7091 /* Initialize the CRC table and the decoding table. */
7095 for (i
= 0; i
< 256; i
++)
7097 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7098 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7105 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7111 /* compare-sections command
7113 With no arguments, compares each loadable section in the exec bfd
7114 with the same memory range on the target, and reports mismatches.
7115 Useful for verifying the image on the target against the exec file.
7116 Depends on the target understanding the new "qCRC:" request. */
7118 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7119 target method (target verify memory) and generic version of the
7120 actual command. This will allow other high-level code (especially
7121 generic_load()) to make use of this target functionality. */
7124 compare_sections_command (char *args
, int from_tty
)
7126 struct remote_state
*rs
= get_remote_state ();
7128 unsigned long host_crc
, target_crc
;
7129 struct cleanup
*old_chain
;
7132 const char *sectname
;
7139 error (_("command cannot be used without an exec file"));
7140 if (!current_target
.to_shortname
||
7141 strcmp (current_target
.to_shortname
, "remote") != 0)
7142 error (_("command can only be used with remote target"));
7144 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7146 if (!(s
->flags
& SEC_LOAD
))
7147 continue; /* skip non-loadable section */
7149 size
= bfd_get_section_size (s
);
7151 continue; /* skip zero-length section */
7153 sectname
= bfd_get_section_name (exec_bfd
, s
);
7154 if (args
&& strcmp (args
, sectname
) != 0)
7155 continue; /* not the section selected by user */
7157 matched
= 1; /* do this section */
7159 /* FIXME: assumes lma can fit into long. */
7160 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7161 (long) lma
, (long) size
);
7164 /* Be clever; compute the host_crc before waiting for target
7166 sectdata
= xmalloc (size
);
7167 old_chain
= make_cleanup (xfree
, sectdata
);
7168 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7169 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
7171 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7172 if (rs
->buf
[0] == 'E')
7173 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
7174 paddress (target_gdbarch
, lma
),
7175 paddress (target_gdbarch
, lma
+ size
));
7176 if (rs
->buf
[0] != 'C')
7177 error (_("remote target does not support this operation"));
7179 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7180 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7182 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
7183 paddress (target_gdbarch
, lma
),
7184 paddress (target_gdbarch
, lma
+ size
));
7185 if (host_crc
== target_crc
)
7186 printf_filtered ("matched.\n");
7189 printf_filtered ("MIS-MATCHED!\n");
7193 do_cleanups (old_chain
);
7196 warning (_("One or more sections of the remote executable does not match\n\
7197 the loaded file\n"));
7198 if (args
&& !matched
)
7199 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7202 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7203 into remote target. The number of bytes written to the remote
7204 target is returned, or -1 for error. */
7207 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7208 const char *annex
, const gdb_byte
*writebuf
,
7209 ULONGEST offset
, LONGEST len
,
7210 struct packet_config
*packet
)
7214 struct remote_state
*rs
= get_remote_state ();
7215 int max_size
= get_memory_write_packet_size ();
7217 if (packet
->support
== PACKET_DISABLE
)
7220 /* Insert header. */
7221 i
= snprintf (rs
->buf
, max_size
,
7222 "qXfer:%s:write:%s:%s:",
7223 object_name
, annex
? annex
: "",
7224 phex_nz (offset
, sizeof offset
));
7225 max_size
-= (i
+ 1);
7227 /* Escape as much data as fits into rs->buf. */
7228 buf_len
= remote_escape_output
7229 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
7231 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
7232 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7233 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7236 unpack_varlen_hex (rs
->buf
, &n
);
7240 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7241 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7242 number of bytes read is returned, or 0 for EOF, or -1 for error.
7243 The number of bytes read may be less than LEN without indicating an
7244 EOF. PACKET is checked and updated to indicate whether the remote
7245 target supports this object. */
7248 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
7250 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
7251 struct packet_config
*packet
)
7253 static char *finished_object
;
7254 static char *finished_annex
;
7255 static ULONGEST finished_offset
;
7257 struct remote_state
*rs
= get_remote_state ();
7258 LONGEST i
, n
, packet_len
;
7260 if (packet
->support
== PACKET_DISABLE
)
7263 /* Check whether we've cached an end-of-object packet that matches
7265 if (finished_object
)
7267 if (strcmp (object_name
, finished_object
) == 0
7268 && strcmp (annex
? annex
: "", finished_annex
) == 0
7269 && offset
== finished_offset
)
7272 /* Otherwise, we're now reading something different. Discard
7274 xfree (finished_object
);
7275 xfree (finished_annex
);
7276 finished_object
= NULL
;
7277 finished_annex
= NULL
;
7280 /* Request only enough to fit in a single packet. The actual data
7281 may not, since we don't know how much of it will need to be escaped;
7282 the target is free to respond with slightly less data. We subtract
7283 five to account for the response type and the protocol frame. */
7284 n
= min (get_remote_packet_size () - 5, len
);
7285 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7286 object_name
, annex
? annex
: "",
7287 phex_nz (offset
, sizeof offset
),
7288 phex_nz (n
, sizeof n
));
7289 i
= putpkt (rs
->buf
);
7294 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
7295 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7298 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
7299 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
7301 /* 'm' means there is (or at least might be) more data after this
7302 batch. That does not make sense unless there's at least one byte
7303 of data in this reply. */
7304 if (rs
->buf
[0] == 'm' && packet_len
== 1)
7305 error (_("Remote qXfer reply contained no data."));
7307 /* Got some data. */
7308 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
7310 /* 'l' is an EOF marker, possibly including a final block of data,
7311 or possibly empty. If we have the final block of a non-empty
7312 object, record this fact to bypass a subsequent partial read. */
7313 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
7315 finished_object
= xstrdup (object_name
);
7316 finished_annex
= xstrdup (annex
? annex
: "");
7317 finished_offset
= offset
+ i
;
7324 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
7325 const char *annex
, gdb_byte
*readbuf
,
7326 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
7328 struct remote_state
*rs
;
7333 set_general_thread (inferior_ptid
);
7335 rs
= get_remote_state ();
7337 /* Handle memory using the standard memory routines. */
7338 if (object
== TARGET_OBJECT_MEMORY
)
7343 /* If the remote target is connected but not running, we should
7344 pass this request down to a lower stratum (e.g. the executable
7346 if (!target_has_execution
)
7349 if (writebuf
!= NULL
)
7350 xfered
= remote_write_bytes (offset
, writebuf
, len
);
7352 xfered
= remote_read_bytes (offset
, readbuf
, len
);
7356 else if (xfered
== 0 && errno
== 0)
7362 /* Handle SPU memory using qxfer packets. */
7363 if (object
== TARGET_OBJECT_SPU
)
7366 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
7367 &remote_protocol_packets
7368 [PACKET_qXfer_spu_read
]);
7370 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
7371 &remote_protocol_packets
7372 [PACKET_qXfer_spu_write
]);
7375 /* Handle extra signal info using qxfer packets. */
7376 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
7379 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
7380 &remote_protocol_packets
7381 [PACKET_qXfer_siginfo_read
]);
7383 return remote_write_qxfer (ops
, "siginfo", annex
, writebuf
, offset
, len
,
7384 &remote_protocol_packets
7385 [PACKET_qXfer_siginfo_write
]);
7388 /* Only handle flash writes. */
7389 if (writebuf
!= NULL
)
7395 case TARGET_OBJECT_FLASH
:
7396 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
7400 else if (xfered
== 0 && errno
== 0)
7410 /* Map pre-existing objects onto letters. DO NOT do this for new
7411 objects!!! Instead specify new query packets. */
7414 case TARGET_OBJECT_AVR
:
7418 case TARGET_OBJECT_AUXV
:
7419 gdb_assert (annex
== NULL
);
7420 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
7421 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
7423 case TARGET_OBJECT_AVAILABLE_FEATURES
:
7424 return remote_read_qxfer
7425 (ops
, "features", annex
, readbuf
, offset
, len
,
7426 &remote_protocol_packets
[PACKET_qXfer_features
]);
7428 case TARGET_OBJECT_LIBRARIES
:
7429 return remote_read_qxfer
7430 (ops
, "libraries", annex
, readbuf
, offset
, len
,
7431 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
7433 case TARGET_OBJECT_MEMORY_MAP
:
7434 gdb_assert (annex
== NULL
);
7435 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
7436 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
7438 case TARGET_OBJECT_OSDATA
:
7439 /* Should only get here if we're connected. */
7440 gdb_assert (remote_desc
);
7441 return remote_read_qxfer
7442 (ops
, "osdata", annex
, readbuf
, offset
, len
,
7443 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
7449 /* Note: a zero OFFSET and LEN can be used to query the minimum
7451 if (offset
== 0 && len
== 0)
7452 return (get_remote_packet_size ());
7453 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7454 large enough let the caller deal with it. */
7455 if (len
< get_remote_packet_size ())
7457 len
= get_remote_packet_size ();
7459 /* Except for querying the minimum buffer size, target must be open. */
7461 error (_("remote query is only available after target open"));
7463 gdb_assert (annex
!= NULL
);
7464 gdb_assert (readbuf
!= NULL
);
7470 /* We used one buffer char for the remote protocol q command and
7471 another for the query type. As the remote protocol encapsulation
7472 uses 4 chars plus one extra in case we are debugging
7473 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7476 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
7478 /* Bad caller may have sent forbidden characters. */
7479 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
7484 gdb_assert (annex
[i
] == '\0');
7486 i
= putpkt (rs
->buf
);
7490 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7491 strcpy ((char *) readbuf
, rs
->buf
);
7493 return strlen ((char *) readbuf
);
7497 remote_search_memory (struct target_ops
* ops
,
7498 CORE_ADDR start_addr
, ULONGEST search_space_len
,
7499 const gdb_byte
*pattern
, ULONGEST pattern_len
,
7500 CORE_ADDR
*found_addrp
)
7502 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
7503 struct remote_state
*rs
= get_remote_state ();
7504 int max_size
= get_memory_write_packet_size ();
7505 struct packet_config
*packet
=
7506 &remote_protocol_packets
[PACKET_qSearch_memory
];
7507 /* number of packet bytes used to encode the pattern,
7508 this could be more than PATTERN_LEN due to escape characters */
7509 int escaped_pattern_len
;
7510 /* amount of pattern that was encodable in the packet */
7511 int used_pattern_len
;
7514 ULONGEST found_addr
;
7516 /* Don't go to the target if we don't have to.
7517 This is done before checking packet->support to avoid the possibility that
7518 a success for this edge case means the facility works in general. */
7519 if (pattern_len
> search_space_len
)
7521 if (pattern_len
== 0)
7523 *found_addrp
= start_addr
;
7527 /* If we already know the packet isn't supported, fall back to the simple
7528 way of searching memory. */
7530 if (packet
->support
== PACKET_DISABLE
)
7532 /* Target doesn't provided special support, fall back and use the
7533 standard support (copy memory and do the search here). */
7534 return simple_search_memory (ops
, start_addr
, search_space_len
,
7535 pattern
, pattern_len
, found_addrp
);
7538 /* Insert header. */
7539 i
= snprintf (rs
->buf
, max_size
,
7540 "qSearch:memory:%s;%s;",
7541 phex_nz (start_addr
, addr_size
),
7542 phex_nz (search_space_len
, sizeof (search_space_len
)));
7543 max_size
-= (i
+ 1);
7545 /* Escape as much data as fits into rs->buf. */
7546 escaped_pattern_len
=
7547 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
7548 &used_pattern_len
, max_size
);
7550 /* Bail if the pattern is too large. */
7551 if (used_pattern_len
!= pattern_len
)
7552 error ("Pattern is too large to transmit to remote target.");
7554 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
7555 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7556 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7558 /* The request may not have worked because the command is not
7559 supported. If so, fall back to the simple way. */
7560 if (packet
->support
== PACKET_DISABLE
)
7562 return simple_search_memory (ops
, start_addr
, search_space_len
,
7563 pattern
, pattern_len
, found_addrp
);
7568 if (rs
->buf
[0] == '0')
7570 else if (rs
->buf
[0] == '1')
7573 if (rs
->buf
[1] != ',')
7574 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7575 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
7576 *found_addrp
= found_addr
;
7579 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7585 remote_rcmd (char *command
,
7586 struct ui_file
*outbuf
)
7588 struct remote_state
*rs
= get_remote_state ();
7592 error (_("remote rcmd is only available after target open"));
7594 /* Send a NULL command across as an empty command. */
7595 if (command
== NULL
)
7598 /* The query prefix. */
7599 strcpy (rs
->buf
, "qRcmd,");
7600 p
= strchr (rs
->buf
, '\0');
7602 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
7603 error (_("\"monitor\" command ``%s'' is too long."), command
);
7605 /* Encode the actual command. */
7606 bin2hex ((gdb_byte
*) command
, p
, 0);
7608 if (putpkt (rs
->buf
) < 0)
7609 error (_("Communication problem with target."));
7611 /* get/display the response */
7616 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
7618 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7621 error (_("Target does not support this command."));
7622 if (buf
[0] == 'O' && buf
[1] != 'K')
7624 remote_console_output (buf
+ 1); /* 'O' message from stub. */
7627 if (strcmp (buf
, "OK") == 0)
7629 if (strlen (buf
) == 3 && buf
[0] == 'E'
7630 && isdigit (buf
[1]) && isdigit (buf
[2]))
7632 error (_("Protocol error with Rcmd"));
7634 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
7636 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
7637 fputc_unfiltered (c
, outbuf
);
7643 static VEC(mem_region_s
) *
7644 remote_memory_map (struct target_ops
*ops
)
7646 VEC(mem_region_s
) *result
= NULL
;
7647 char *text
= target_read_stralloc (¤t_target
,
7648 TARGET_OBJECT_MEMORY_MAP
, NULL
);
7652 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
7653 result
= parse_memory_map (text
);
7654 do_cleanups (back_to
);
7661 packet_command (char *args
, int from_tty
)
7663 struct remote_state
*rs
= get_remote_state ();
7666 error (_("command can only be used with remote target"));
7669 error (_("remote-packet command requires packet text as argument"));
7671 puts_filtered ("sending: ");
7672 print_packet (args
);
7673 puts_filtered ("\n");
7676 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7677 puts_filtered ("received: ");
7678 print_packet (rs
->buf
);
7679 puts_filtered ("\n");
7683 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
7685 static void display_thread_info (struct gdb_ext_thread_info
*info
);
7687 static void threadset_test_cmd (char *cmd
, int tty
);
7689 static void threadalive_test (char *cmd
, int tty
);
7691 static void threadlist_test_cmd (char *cmd
, int tty
);
7693 int get_and_display_threadinfo (threadref
*ref
);
7695 static void threadinfo_test_cmd (char *cmd
, int tty
);
7697 static int thread_display_step (threadref
*ref
, void *context
);
7699 static void threadlist_update_test_cmd (char *cmd
, int tty
);
7701 static void init_remote_threadtests (void);
7703 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
7706 threadset_test_cmd (char *cmd
, int tty
)
7708 int sample_thread
= SAMPLE_THREAD
;
7710 printf_filtered (_("Remote threadset test\n"));
7711 set_general_thread (sample_thread
);
7716 threadalive_test (char *cmd
, int tty
)
7718 int sample_thread
= SAMPLE_THREAD
;
7719 int pid
= ptid_get_pid (inferior_ptid
);
7720 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
7722 if (remote_thread_alive (ptid
))
7723 printf_filtered ("PASS: Thread alive test\n");
7725 printf_filtered ("FAIL: Thread alive test\n");
7728 void output_threadid (char *title
, threadref
*ref
);
7731 output_threadid (char *title
, threadref
*ref
)
7735 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
7737 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
7741 threadlist_test_cmd (char *cmd
, int tty
)
7744 threadref nextthread
;
7745 int done
, result_count
;
7746 threadref threadlist
[3];
7748 printf_filtered ("Remote Threadlist test\n");
7749 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
7750 &result_count
, &threadlist
[0]))
7751 printf_filtered ("FAIL: threadlist test\n");
7754 threadref
*scan
= threadlist
;
7755 threadref
*limit
= scan
+ result_count
;
7757 while (scan
< limit
)
7758 output_threadid (" thread ", scan
++);
7763 display_thread_info (struct gdb_ext_thread_info
*info
)
7765 output_threadid ("Threadid: ", &info
->threadid
);
7766 printf_filtered ("Name: %s\n ", info
->shortname
);
7767 printf_filtered ("State: %s\n", info
->display
);
7768 printf_filtered ("other: %s\n\n", info
->more_display
);
7772 get_and_display_threadinfo (threadref
*ref
)
7776 struct gdb_ext_thread_info threadinfo
;
7778 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
7779 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
7780 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
7781 display_thread_info (&threadinfo
);
7786 threadinfo_test_cmd (char *cmd
, int tty
)
7788 int athread
= SAMPLE_THREAD
;
7792 int_to_threadref (&thread
, athread
);
7793 printf_filtered ("Remote Threadinfo test\n");
7794 if (!get_and_display_threadinfo (&thread
))
7795 printf_filtered ("FAIL cannot get thread info\n");
7799 thread_display_step (threadref
*ref
, void *context
)
7801 /* output_threadid(" threadstep ",ref); *//* simple test */
7802 return get_and_display_threadinfo (ref
);
7806 threadlist_update_test_cmd (char *cmd
, int tty
)
7808 printf_filtered ("Remote Threadlist update test\n");
7809 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
7813 init_remote_threadtests (void)
7815 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
7816 Fetch and print the remote list of thread identifiers, one pkt only"));
7817 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
7818 _("Fetch and display info about one thread"));
7819 add_com ("tset", class_obscure
, threadset_test_cmd
,
7820 _("Test setting to a different thread"));
7821 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
7822 _("Iterate through updating all remote thread info"));
7823 add_com ("talive", class_obscure
, threadalive_test
,
7824 _(" Remote thread alive test "));
7829 /* Convert a thread ID to a string. Returns the string in a static
7833 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
7835 static char buf
[64];
7836 struct remote_state
*rs
= get_remote_state ();
7838 if (ptid_is_pid (ptid
))
7840 /* Printing an inferior target id. */
7842 /* When multi-process extensions are off, there's no way in the
7843 remote protocol to know the remote process id, if there's any
7844 at all. There's one exception --- when we're connected with
7845 target extended-remote, and we manually attached to a process
7846 with "attach PID". We don't record anywhere a flag that
7847 allows us to distinguish that case from the case of
7848 connecting with extended-remote and the stub already being
7849 attached to a process, and reporting yes to qAttached, hence
7850 no smart special casing here. */
7851 if (!remote_multi_process_p (rs
))
7853 xsnprintf (buf
, sizeof buf
, "Remote target");
7857 return normal_pid_to_str (ptid
);
7861 if (ptid_equal (magic_null_ptid
, ptid
))
7862 xsnprintf (buf
, sizeof buf
, "Thread <main>");
7863 else if (remote_multi_process_p (rs
))
7864 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
7865 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
7867 xsnprintf (buf
, sizeof buf
, "Thread %ld",
7868 ptid_get_tid (ptid
));
7873 /* Get the address of the thread local variable in OBJFILE which is
7874 stored at OFFSET within the thread local storage for thread PTID. */
7877 remote_get_thread_local_address (struct target_ops
*ops
,
7878 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
7880 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
7882 struct remote_state
*rs
= get_remote_state ();
7884 char *endp
= rs
->buf
+ get_remote_packet_size ();
7885 enum packet_result result
;
7887 strcpy (p
, "qGetTLSAddr:");
7889 p
= write_ptid (p
, endp
, ptid
);
7891 p
+= hexnumstr (p
, offset
);
7893 p
+= hexnumstr (p
, lm
);
7897 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7898 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
7899 if (result
== PACKET_OK
)
7903 unpack_varlen_hex (rs
->buf
, &result
);
7906 else if (result
== PACKET_UNKNOWN
)
7907 throw_error (TLS_GENERIC_ERROR
,
7908 _("Remote target doesn't support qGetTLSAddr packet"));
7910 throw_error (TLS_GENERIC_ERROR
,
7911 _("Remote target failed to process qGetTLSAddr request"));
7914 throw_error (TLS_GENERIC_ERROR
,
7915 _("TLS not supported or disabled on this target"));
7920 /* Support for inferring a target description based on the current
7921 architecture and the size of a 'g' packet. While the 'g' packet
7922 can have any size (since optional registers can be left off the
7923 end), some sizes are easily recognizable given knowledge of the
7924 approximate architecture. */
7926 struct remote_g_packet_guess
7929 const struct target_desc
*tdesc
;
7931 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
7932 DEF_VEC_O(remote_g_packet_guess_s
);
7934 struct remote_g_packet_data
7936 VEC(remote_g_packet_guess_s
) *guesses
;
7939 static struct gdbarch_data
*remote_g_packet_data_handle
;
7942 remote_g_packet_data_init (struct obstack
*obstack
)
7944 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
7948 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
7949 const struct target_desc
*tdesc
)
7951 struct remote_g_packet_data
*data
7952 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
7953 struct remote_g_packet_guess new_guess
, *guess
;
7956 gdb_assert (tdesc
!= NULL
);
7959 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7961 if (guess
->bytes
== bytes
)
7962 internal_error (__FILE__
, __LINE__
,
7963 "Duplicate g packet description added for size %d",
7966 new_guess
.bytes
= bytes
;
7967 new_guess
.tdesc
= tdesc
;
7968 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
7971 /* Return 1 if remote_read_description would do anything on this target
7972 and architecture, 0 otherwise. */
7975 remote_read_description_p (struct target_ops
*target
)
7977 struct remote_g_packet_data
*data
7978 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7980 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7986 static const struct target_desc
*
7987 remote_read_description (struct target_ops
*target
)
7989 struct remote_g_packet_data
*data
7990 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7992 /* Do not try this during initial connection, when we do not know
7993 whether there is a running but stopped thread. */
7994 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
7997 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7999 struct remote_g_packet_guess
*guess
;
8001 int bytes
= send_g_packet ();
8004 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8006 if (guess
->bytes
== bytes
)
8007 return guess
->tdesc
;
8009 /* We discard the g packet. A minor optimization would be to
8010 hold on to it, and fill the register cache once we have selected
8011 an architecture, but it's too tricky to do safely. */
8017 /* Remote file transfer support. This is host-initiated I/O, not
8018 target-initiated; for target-initiated, see remote-fileio.c. */
8020 /* If *LEFT is at least the length of STRING, copy STRING to
8021 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8022 decrease *LEFT. Otherwise raise an error. */
8025 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8027 int len
= strlen (string
);
8030 error (_("Packet too long for target."));
8032 memcpy (*buffer
, string
, len
);
8036 /* NUL-terminate the buffer as a convenience, if there is
8042 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8043 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8044 decrease *LEFT. Otherwise raise an error. */
8047 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8050 if (2 * len
> *left
)
8051 error (_("Packet too long for target."));
8053 bin2hex (bytes
, *buffer
, len
);
8057 /* NUL-terminate the buffer as a convenience, if there is
8063 /* If *LEFT is large enough, convert VALUE to hex and add it to
8064 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8065 decrease *LEFT. Otherwise raise an error. */
8068 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8070 int len
= hexnumlen (value
);
8073 error (_("Packet too long for target."));
8075 hexnumstr (*buffer
, value
);
8079 /* NUL-terminate the buffer as a convenience, if there is
8085 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8086 value, *REMOTE_ERRNO to the remote error number or zero if none
8087 was included, and *ATTACHMENT to point to the start of the annex
8088 if any. The length of the packet isn't needed here; there may
8089 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8091 Return 0 if the packet could be parsed, -1 if it could not. If
8092 -1 is returned, the other variables may not be initialized. */
8095 remote_hostio_parse_result (char *buffer
, int *retcode
,
8096 int *remote_errno
, char **attachment
)
8103 if (buffer
[0] != 'F')
8107 *retcode
= strtol (&buffer
[1], &p
, 16);
8108 if (errno
!= 0 || p
== &buffer
[1])
8111 /* Check for ",errno". */
8115 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8116 if (errno
!= 0 || p
+ 1 == p2
)
8121 /* Check for ";attachment". If there is no attachment, the
8122 packet should end here. */
8125 *attachment
= p
+ 1;
8128 else if (*p
== '\0')
8134 /* Send a prepared I/O packet to the target and read its response.
8135 The prepared packet is in the global RS->BUF before this function
8136 is called, and the answer is there when we return.
8138 COMMAND_BYTES is the length of the request to send, which may include
8139 binary data. WHICH_PACKET is the packet configuration to check
8140 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8141 is set to the error number and -1 is returned. Otherwise the value
8142 returned by the function is returned.
8144 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8145 attachment is expected; an error will be reported if there's a
8146 mismatch. If one is found, *ATTACHMENT will be set to point into
8147 the packet buffer and *ATTACHMENT_LEN will be set to the
8148 attachment's length. */
8151 remote_hostio_send_command (int command_bytes
, int which_packet
,
8152 int *remote_errno
, char **attachment
,
8153 int *attachment_len
)
8155 struct remote_state
*rs
= get_remote_state ();
8156 int ret
, bytes_read
;
8157 char *attachment_tmp
;
8160 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
8162 *remote_errno
= FILEIO_ENOSYS
;
8166 putpkt_binary (rs
->buf
, command_bytes
);
8167 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8169 /* If it timed out, something is wrong. Don't try to parse the
8173 *remote_errno
= FILEIO_EINVAL
;
8177 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
8180 *remote_errno
= FILEIO_EINVAL
;
8182 case PACKET_UNKNOWN
:
8183 *remote_errno
= FILEIO_ENOSYS
;
8189 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
8192 *remote_errno
= FILEIO_EINVAL
;
8196 /* Make sure we saw an attachment if and only if we expected one. */
8197 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
8198 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
8200 *remote_errno
= FILEIO_EINVAL
;
8204 /* If an attachment was found, it must point into the packet buffer;
8205 work out how many bytes there were. */
8206 if (attachment_tmp
!= NULL
)
8208 *attachment
= attachment_tmp
;
8209 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
8215 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8216 remote file descriptor, or -1 if an error occurs (and set
8220 remote_hostio_open (const char *filename
, int flags
, int mode
,
8223 struct remote_state
*rs
= get_remote_state ();
8225 int left
= get_remote_packet_size () - 1;
8227 remote_buffer_add_string (&p
, &left
, "vFile:open:");
8229 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8231 remote_buffer_add_string (&p
, &left
, ",");
8233 remote_buffer_add_int (&p
, &left
, flags
);
8234 remote_buffer_add_string (&p
, &left
, ",");
8236 remote_buffer_add_int (&p
, &left
, mode
);
8238 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
8239 remote_errno
, NULL
, NULL
);
8242 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8243 Return the number of bytes written, or -1 if an error occurs (and
8244 set *REMOTE_ERRNO). */
8247 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
8248 ULONGEST offset
, int *remote_errno
)
8250 struct remote_state
*rs
= get_remote_state ();
8252 int left
= get_remote_packet_size ();
8255 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
8257 remote_buffer_add_int (&p
, &left
, fd
);
8258 remote_buffer_add_string (&p
, &left
, ",");
8260 remote_buffer_add_int (&p
, &left
, offset
);
8261 remote_buffer_add_string (&p
, &left
, ",");
8263 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
8264 get_remote_packet_size () - (p
- rs
->buf
));
8266 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
8267 remote_errno
, NULL
, NULL
);
8270 /* Read up to LEN bytes FD on the remote target into READ_BUF
8271 Return the number of bytes read, or -1 if an error occurs (and
8272 set *REMOTE_ERRNO). */
8275 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
8276 ULONGEST offset
, int *remote_errno
)
8278 struct remote_state
*rs
= get_remote_state ();
8281 int left
= get_remote_packet_size ();
8282 int ret
, attachment_len
;
8285 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
8287 remote_buffer_add_int (&p
, &left
, fd
);
8288 remote_buffer_add_string (&p
, &left
, ",");
8290 remote_buffer_add_int (&p
, &left
, len
);
8291 remote_buffer_add_string (&p
, &left
, ",");
8293 remote_buffer_add_int (&p
, &left
, offset
);
8295 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
8296 remote_errno
, &attachment
,
8302 read_len
= remote_unescape_input (attachment
, attachment_len
,
8304 if (read_len
!= ret
)
8305 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
8310 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8311 (and set *REMOTE_ERRNO). */
8314 remote_hostio_close (int fd
, int *remote_errno
)
8316 struct remote_state
*rs
= get_remote_state ();
8318 int left
= get_remote_packet_size () - 1;
8320 remote_buffer_add_string (&p
, &left
, "vFile:close:");
8322 remote_buffer_add_int (&p
, &left
, fd
);
8324 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
8325 remote_errno
, NULL
, NULL
);
8328 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8329 occurs (and set *REMOTE_ERRNO). */
8332 remote_hostio_unlink (const char *filename
, int *remote_errno
)
8334 struct remote_state
*rs
= get_remote_state ();
8336 int left
= get_remote_packet_size () - 1;
8338 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
8340 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8343 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
8344 remote_errno
, NULL
, NULL
);
8348 remote_fileio_errno_to_host (int errnum
)
8372 case FILEIO_ENOTDIR
:
8392 case FILEIO_ENAMETOOLONG
:
8393 return ENAMETOOLONG
;
8399 remote_hostio_error (int errnum
)
8401 int host_error
= remote_fileio_errno_to_host (errnum
);
8403 if (host_error
== -1)
8404 error (_("Unknown remote I/O error %d"), errnum
);
8406 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
8410 remote_hostio_close_cleanup (void *opaque
)
8412 int fd
= *(int *) opaque
;
8415 remote_hostio_close (fd
, &remote_errno
);
8420 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
8422 const char *filename
= bfd_get_filename (abfd
);
8423 int fd
, remote_errno
;
8426 gdb_assert (remote_filename_p (filename
));
8428 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
8431 errno
= remote_fileio_errno_to_host (remote_errno
);
8432 bfd_set_error (bfd_error_system_call
);
8436 stream
= xmalloc (sizeof (int));
8442 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
8444 int fd
= *(int *)stream
;
8449 /* Ignore errors on close; these may happen if the remote
8450 connection was already torn down. */
8451 remote_hostio_close (fd
, &remote_errno
);
8457 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
8458 file_ptr nbytes
, file_ptr offset
)
8460 int fd
= *(int *)stream
;
8462 file_ptr pos
, bytes
;
8465 while (nbytes
> pos
)
8467 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
8468 offset
+ pos
, &remote_errno
);
8470 /* Success, but no bytes, means end-of-file. */
8474 errno
= remote_fileio_errno_to_host (remote_errno
);
8475 bfd_set_error (bfd_error_system_call
);
8486 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
8488 /* FIXME: We should probably implement remote_hostio_stat. */
8489 sb
->st_size
= INT_MAX
;
8494 remote_filename_p (const char *filename
)
8496 return strncmp (filename
, "remote:", 7) == 0;
8500 remote_bfd_open (const char *remote_file
, const char *target
)
8502 return bfd_openr_iovec (remote_file
, target
,
8503 remote_bfd_iovec_open
, NULL
,
8504 remote_bfd_iovec_pread
,
8505 remote_bfd_iovec_close
,
8506 remote_bfd_iovec_stat
);
8510 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
8512 struct cleanup
*back_to
, *close_cleanup
;
8513 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8516 int bytes_in_buffer
;
8521 error (_("command can only be used with remote target"));
8523 file
= fopen (local_file
, "rb");
8525 perror_with_name (local_file
);
8526 back_to
= make_cleanup_fclose (file
);
8528 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
8530 0700, &remote_errno
);
8532 remote_hostio_error (remote_errno
);
8534 /* Send up to this many bytes at once. They won't all fit in the
8535 remote packet limit, so we'll transfer slightly fewer. */
8536 io_size
= get_remote_packet_size ();
8537 buffer
= xmalloc (io_size
);
8538 make_cleanup (xfree
, buffer
);
8540 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8542 bytes_in_buffer
= 0;
8545 while (bytes_in_buffer
|| !saw_eof
)
8549 bytes
= fread (buffer
+ bytes_in_buffer
, 1, io_size
- bytes_in_buffer
,
8554 error (_("Error reading %s."), local_file
);
8557 /* EOF. Unless there is something still in the
8558 buffer from the last iteration, we are done. */
8560 if (bytes_in_buffer
== 0)
8568 bytes
+= bytes_in_buffer
;
8569 bytes_in_buffer
= 0;
8571 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
, offset
, &remote_errno
);
8574 remote_hostio_error (remote_errno
);
8575 else if (retcode
== 0)
8576 error (_("Remote write of %d bytes returned 0!"), bytes
);
8577 else if (retcode
< bytes
)
8579 /* Short write. Save the rest of the read data for the next
8581 bytes_in_buffer
= bytes
- retcode
;
8582 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
8588 discard_cleanups (close_cleanup
);
8589 if (remote_hostio_close (fd
, &remote_errno
))
8590 remote_hostio_error (remote_errno
);
8593 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
8594 do_cleanups (back_to
);
8598 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
8600 struct cleanup
*back_to
, *close_cleanup
;
8601 int fd
, remote_errno
, bytes
, io_size
;
8607 error (_("command can only be used with remote target"));
8609 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
8611 remote_hostio_error (remote_errno
);
8613 file
= fopen (local_file
, "wb");
8615 perror_with_name (local_file
);
8616 back_to
= make_cleanup_fclose (file
);
8618 /* Send up to this many bytes at once. They won't all fit in the
8619 remote packet limit, so we'll transfer slightly fewer. */
8620 io_size
= get_remote_packet_size ();
8621 buffer
= xmalloc (io_size
);
8622 make_cleanup (xfree
, buffer
);
8624 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8629 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
8631 /* Success, but no bytes, means end-of-file. */
8634 remote_hostio_error (remote_errno
);
8638 bytes
= fwrite (buffer
, 1, bytes
, file
);
8640 perror_with_name (local_file
);
8643 discard_cleanups (close_cleanup
);
8644 if (remote_hostio_close (fd
, &remote_errno
))
8645 remote_hostio_error (remote_errno
);
8648 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
8649 do_cleanups (back_to
);
8653 remote_file_delete (const char *remote_file
, int from_tty
)
8655 int retcode
, remote_errno
;
8658 error (_("command can only be used with remote target"));
8660 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
8662 remote_hostio_error (remote_errno
);
8665 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
8669 remote_put_command (char *args
, int from_tty
)
8671 struct cleanup
*back_to
;
8675 error_no_arg (_("file to put"));
8677 argv
= gdb_buildargv (args
);
8678 back_to
= make_cleanup_freeargv (argv
);
8679 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8680 error (_("Invalid parameters to remote put"));
8682 remote_file_put (argv
[0], argv
[1], from_tty
);
8684 do_cleanups (back_to
);
8688 remote_get_command (char *args
, int from_tty
)
8690 struct cleanup
*back_to
;
8694 error_no_arg (_("file to get"));
8696 argv
= gdb_buildargv (args
);
8697 back_to
= make_cleanup_freeargv (argv
);
8698 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8699 error (_("Invalid parameters to remote get"));
8701 remote_file_get (argv
[0], argv
[1], from_tty
);
8703 do_cleanups (back_to
);
8707 remote_delete_command (char *args
, int from_tty
)
8709 struct cleanup
*back_to
;
8713 error_no_arg (_("file to delete"));
8715 argv
= gdb_buildargv (args
);
8716 back_to
= make_cleanup_freeargv (argv
);
8717 if (argv
[0] == NULL
|| argv
[1] != NULL
)
8718 error (_("Invalid parameters to remote delete"));
8720 remote_file_delete (argv
[0], from_tty
);
8722 do_cleanups (back_to
);
8726 remote_command (char *args
, int from_tty
)
8728 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
8731 static int remote_target_can_reverse
= 1;
8734 remote_can_execute_reverse (void)
8736 return remote_target_can_reverse
;
8740 remote_supports_non_stop (void)
8746 remote_supports_multi_process (void)
8748 struct remote_state
*rs
= get_remote_state ();
8749 return remote_multi_process_p (rs
);
8753 remote_supports_cond_tracepoints (void)
8755 struct remote_state
*rs
= get_remote_state ();
8756 return rs
->cond_tracepoints
;
8760 init_remote_ops (void)
8762 remote_ops
.to_shortname
= "remote";
8763 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
8765 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8766 Specify the serial device it is connected to\n\
8767 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
8768 remote_ops
.to_open
= remote_open
;
8769 remote_ops
.to_close
= remote_close
;
8770 remote_ops
.to_detach
= remote_detach
;
8771 remote_ops
.to_disconnect
= remote_disconnect
;
8772 remote_ops
.to_resume
= remote_resume
;
8773 remote_ops
.to_wait
= remote_wait
;
8774 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
8775 remote_ops
.to_store_registers
= remote_store_registers
;
8776 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
8777 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
8778 remote_ops
.to_files_info
= remote_files_info
;
8779 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
8780 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
8781 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
8782 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
8783 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
8784 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
8785 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
8786 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
8787 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
8788 remote_ops
.to_kill
= remote_kill
;
8789 remote_ops
.to_load
= generic_load
;
8790 remote_ops
.to_mourn_inferior
= remote_mourn
;
8791 remote_ops
.to_thread_alive
= remote_thread_alive
;
8792 remote_ops
.to_find_new_threads
= remote_threads_info
;
8793 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
8794 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
8795 remote_ops
.to_stop
= remote_stop
;
8796 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
8797 remote_ops
.to_rcmd
= remote_rcmd
;
8798 remote_ops
.to_log_command
= serial_log_command
;
8799 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
8800 remote_ops
.to_stratum
= process_stratum
;
8801 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
8802 remote_ops
.to_has_memory
= default_child_has_memory
;
8803 remote_ops
.to_has_stack
= default_child_has_stack
;
8804 remote_ops
.to_has_registers
= default_child_has_registers
;
8805 remote_ops
.to_has_execution
= default_child_has_execution
;
8806 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
8807 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
8808 remote_ops
.to_magic
= OPS_MAGIC
;
8809 remote_ops
.to_memory_map
= remote_memory_map
;
8810 remote_ops
.to_flash_erase
= remote_flash_erase
;
8811 remote_ops
.to_flash_done
= remote_flash_done
;
8812 remote_ops
.to_read_description
= remote_read_description
;
8813 remote_ops
.to_search_memory
= remote_search_memory
;
8814 remote_ops
.to_can_async_p
= remote_can_async_p
;
8815 remote_ops
.to_is_async_p
= remote_is_async_p
;
8816 remote_ops
.to_async
= remote_async
;
8817 remote_ops
.to_async_mask
= remote_async_mask
;
8818 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
8819 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
8820 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
8821 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
8824 /* Set up the extended remote vector by making a copy of the standard
8825 remote vector and adding to it. */
8828 init_extended_remote_ops (void)
8830 extended_remote_ops
= remote_ops
;
8832 extended_remote_ops
.to_shortname
= "extended-remote";
8833 extended_remote_ops
.to_longname
=
8834 "Extended remote serial target in gdb-specific protocol";
8835 extended_remote_ops
.to_doc
=
8836 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8837 Specify the serial device it is connected to (e.g. /dev/ttya).";
8838 extended_remote_ops
.to_open
= extended_remote_open
;
8839 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
8840 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
8841 extended_remote_ops
.to_detach
= extended_remote_detach
;
8842 extended_remote_ops
.to_attach
= extended_remote_attach
;
8843 extended_remote_ops
.to_kill
= extended_remote_kill
;
8847 remote_can_async_p (void)
8849 if (!target_async_permitted
)
8850 /* We only enable async when the user specifically asks for it. */
8853 /* We're async whenever the serial device is. */
8854 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
8858 remote_is_async_p (void)
8860 if (!target_async_permitted
)
8861 /* We only enable async when the user specifically asks for it. */
8864 /* We're async whenever the serial device is. */
8865 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
8868 /* Pass the SERIAL event on and up to the client. One day this code
8869 will be able to delay notifying the client of an event until the
8870 point where an entire packet has been received. */
8872 static void (*async_client_callback
) (enum inferior_event_type event_type
,
8874 static void *async_client_context
;
8875 static serial_event_ftype remote_async_serial_handler
;
8878 remote_async_serial_handler (struct serial
*scb
, void *context
)
8880 /* Don't propogate error information up to the client. Instead let
8881 the client find out about the error by querying the target. */
8882 async_client_callback (INF_REG_EVENT
, async_client_context
);
8886 remote_async_inferior_event_handler (gdb_client_data data
)
8888 inferior_event_handler (INF_REG_EVENT
, NULL
);
8892 remote_async_get_pending_events_handler (gdb_client_data data
)
8894 remote_get_pending_stop_replies ();
8898 remote_async (void (*callback
) (enum inferior_event_type event_type
,
8899 void *context
), void *context
)
8901 if (remote_async_mask_value
== 0)
8902 internal_error (__FILE__
, __LINE__
,
8903 _("Calling remote_async when async is masked"));
8905 if (callback
!= NULL
)
8907 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
8908 async_client_callback
= callback
;
8909 async_client_context
= context
;
8912 serial_async (remote_desc
, NULL
, NULL
);
8916 remote_async_mask (int new_mask
)
8918 int curr_mask
= remote_async_mask_value
;
8919 remote_async_mask_value
= new_mask
;
8924 set_remote_cmd (char *args
, int from_tty
)
8926 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
8930 show_remote_cmd (char *args
, int from_tty
)
8932 /* We can't just use cmd_show_list here, because we want to skip
8933 the redundant "show remote Z-packet" and the legacy aliases. */
8934 struct cleanup
*showlist_chain
;
8935 struct cmd_list_element
*list
= remote_show_cmdlist
;
8937 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
8938 for (; list
!= NULL
; list
= list
->next
)
8939 if (strcmp (list
->name
, "Z-packet") == 0)
8941 else if (list
->type
== not_set_cmd
)
8942 /* Alias commands are exactly like the original, except they
8943 don't have the normal type. */
8947 struct cleanup
*option_chain
8948 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
8949 ui_out_field_string (uiout
, "name", list
->name
);
8950 ui_out_text (uiout
, ": ");
8951 if (list
->type
== show_cmd
)
8952 do_setshow_command ((char *) NULL
, from_tty
, list
);
8954 cmd_func (list
, NULL
, from_tty
);
8955 /* Close the tuple. */
8956 do_cleanups (option_chain
);
8959 /* Close the tuple. */
8960 do_cleanups (showlist_chain
);
8964 /* Function to be called whenever a new objfile (shlib) is detected. */
8966 remote_new_objfile (struct objfile
*objfile
)
8968 if (remote_desc
!= 0) /* Have a remote connection. */
8969 remote_check_symbols (objfile
);
8973 _initialize_remote (void)
8975 struct remote_state
*rs
;
8977 /* architecture specific data */
8978 remote_gdbarch_data_handle
=
8979 gdbarch_data_register_post_init (init_remote_state
);
8980 remote_g_packet_data_handle
=
8981 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
8983 /* Initialize the per-target state. At the moment there is only one
8984 of these, not one per target. Only one target is active at a
8985 time. The default buffer size is unimportant; it will be expanded
8986 whenever a larger buffer is needed. */
8987 rs
= get_remote_state_raw ();
8989 rs
->buf
= xmalloc (rs
->buf_size
);
8992 add_target (&remote_ops
);
8994 init_extended_remote_ops ();
8995 add_target (&extended_remote_ops
);
8997 /* Hook into new objfile notification. */
8998 observer_attach_new_objfile (remote_new_objfile
);
9000 /* Set up signal handlers. */
9001 sigint_remote_token
=
9002 create_async_signal_handler (async_remote_interrupt
, NULL
);
9003 sigint_remote_twice_token
=
9004 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
9007 init_remote_threadtests ();
9010 /* set/show remote ... */
9012 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
9013 Remote protocol specific variables\n\
9014 Configure various remote-protocol specific variables such as\n\
9015 the packets being used"),
9016 &remote_set_cmdlist
, "set remote ",
9017 0 /* allow-unknown */, &setlist
);
9018 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
9019 Remote protocol specific variables\n\
9020 Configure various remote-protocol specific variables such as\n\
9021 the packets being used"),
9022 &remote_show_cmdlist
, "show remote ",
9023 0 /* allow-unknown */, &showlist
);
9025 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
9026 Compare section data on target to the exec file.\n\
9027 Argument is a single section name (default: all loaded sections)."),
9030 add_cmd ("packet", class_maintenance
, packet_command
, _("\
9031 Send an arbitrary packet to a remote target.\n\
9032 maintenance packet TEXT\n\
9033 If GDB is talking to an inferior via the GDB serial protocol, then\n\
9034 this command sends the string TEXT to the inferior, and displays the\n\
9035 response packet. GDB supplies the initial `$' character, and the\n\
9036 terminating `#' character and checksum."),
9039 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
9040 Set whether to send break if interrupted."), _("\
9041 Show whether to send break if interrupted."), _("\
9042 If set, a break, instead of a cntrl-c, is sent to the remote target."),
9043 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
9044 &setlist
, &showlist
);
9046 /* Install commands for configuring memory read/write packets. */
9048 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
9049 Set the maximum number of bytes per memory write packet (deprecated)."),
9051 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
9052 Show the maximum number of bytes per memory write packet (deprecated)."),
9054 add_cmd ("memory-write-packet-size", no_class
,
9055 set_memory_write_packet_size
, _("\
9056 Set the maximum number of bytes per memory-write packet.\n\
9057 Specify the number of bytes in a packet or 0 (zero) for the\n\
9058 default packet size. The actual limit is further reduced\n\
9059 dependent on the target. Specify ``fixed'' to disable the\n\
9060 further restriction and ``limit'' to enable that restriction."),
9061 &remote_set_cmdlist
);
9062 add_cmd ("memory-read-packet-size", no_class
,
9063 set_memory_read_packet_size
, _("\
9064 Set the maximum number of bytes per memory-read packet.\n\
9065 Specify the number of bytes in a packet or 0 (zero) for the\n\
9066 default packet size. The actual limit is further reduced\n\
9067 dependent on the target. Specify ``fixed'' to disable the\n\
9068 further restriction and ``limit'' to enable that restriction."),
9069 &remote_set_cmdlist
);
9070 add_cmd ("memory-write-packet-size", no_class
,
9071 show_memory_write_packet_size
,
9072 _("Show the maximum number of bytes per memory-write packet."),
9073 &remote_show_cmdlist
);
9074 add_cmd ("memory-read-packet-size", no_class
,
9075 show_memory_read_packet_size
,
9076 _("Show the maximum number of bytes per memory-read packet."),
9077 &remote_show_cmdlist
);
9079 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
9080 &remote_hw_watchpoint_limit
, _("\
9081 Set the maximum number of target hardware watchpoints."), _("\
9082 Show the maximum number of target hardware watchpoints."), _("\
9083 Specify a negative limit for unlimited."),
9084 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
9085 &remote_set_cmdlist
, &remote_show_cmdlist
);
9086 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
9087 &remote_hw_breakpoint_limit
, _("\
9088 Set the maximum number of target hardware breakpoints."), _("\
9089 Show the maximum number of target hardware breakpoints."), _("\
9090 Specify a negative limit for unlimited."),
9091 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
9092 &remote_set_cmdlist
, &remote_show_cmdlist
);
9094 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
9095 &remote_address_size
, _("\
9096 Set the maximum size of the address (in bits) in a memory packet."), _("\
9097 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
9099 NULL
, /* FIXME: i18n: */
9100 &setlist
, &showlist
);
9102 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
9103 "X", "binary-download", 1);
9105 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
9106 "vCont", "verbose-resume", 0);
9108 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
9109 "QPassSignals", "pass-signals", 0);
9111 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
9112 "qSymbol", "symbol-lookup", 0);
9114 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
9115 "P", "set-register", 1);
9117 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
9118 "p", "fetch-register", 1);
9120 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
9121 "Z0", "software-breakpoint", 0);
9123 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
9124 "Z1", "hardware-breakpoint", 0);
9126 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
9127 "Z2", "write-watchpoint", 0);
9129 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
9130 "Z3", "read-watchpoint", 0);
9132 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
9133 "Z4", "access-watchpoint", 0);
9135 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
9136 "qXfer:auxv:read", "read-aux-vector", 0);
9138 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
9139 "qXfer:features:read", "target-features", 0);
9141 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
9142 "qXfer:libraries:read", "library-info", 0);
9144 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
9145 "qXfer:memory-map:read", "memory-map", 0);
9147 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
9148 "qXfer:spu:read", "read-spu-object", 0);
9150 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
9151 "qXfer:spu:write", "write-spu-object", 0);
9153 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
9154 "qXfer:osdata:read", "osdata", 0);
9156 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
9157 "qXfer:siginfo:read", "read-siginfo-object", 0);
9159 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
9160 "qXfer:siginfo:write", "write-siginfo-object", 0);
9162 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
9163 "qGetTLSAddr", "get-thread-local-storage-address",
9166 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
9167 "qSupported", "supported-packets", 0);
9169 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
9170 "qSearch:memory", "search-memory", 0);
9172 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
9173 "vFile:open", "hostio-open", 0);
9175 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
9176 "vFile:pread", "hostio-pread", 0);
9178 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
9179 "vFile:pwrite", "hostio-pwrite", 0);
9181 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
9182 "vFile:close", "hostio-close", 0);
9184 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
9185 "vFile:unlink", "hostio-unlink", 0);
9187 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
9188 "vAttach", "attach", 0);
9190 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
9193 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
9194 "QStartNoAckMode", "noack", 0);
9196 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
9197 "vKill", "kill", 0);
9199 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
9200 "qAttached", "query-attached", 0);
9202 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
9203 "ConditionalTracepoints", "conditional-tracepoints", 0);
9205 /* Keep the old ``set remote Z-packet ...'' working. Each individual
9206 Z sub-packet has its own set and show commands, but users may
9207 have sets to this variable in their .gdbinit files (or in their
9209 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
9210 &remote_Z_packet_detect
, _("\
9211 Set use of remote protocol `Z' packets"), _("\
9212 Show use of remote protocol `Z' packets "), _("\
9213 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
9215 set_remote_protocol_Z_packet_cmd
,
9216 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
9217 &remote_set_cmdlist
, &remote_show_cmdlist
);
9219 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
9220 Manipulate files on the remote system\n\
9221 Transfer files to and from the remote target system."),
9222 &remote_cmdlist
, "remote ",
9223 0 /* allow-unknown */, &cmdlist
);
9225 add_cmd ("put", class_files
, remote_put_command
,
9226 _("Copy a local file to the remote system."),
9229 add_cmd ("get", class_files
, remote_get_command
,
9230 _("Copy a remote file to the local system."),
9233 add_cmd ("delete", class_files
, remote_delete_command
,
9234 _("Delete a remote file."),
9237 remote_exec_file
= xstrdup ("");
9238 add_setshow_string_noescape_cmd ("exec-file", class_files
,
9239 &remote_exec_file
, _("\
9240 Set the remote pathname for \"run\""), _("\
9241 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
9242 &remote_set_cmdlist
, &remote_show_cmdlist
);
9244 /* Eventually initialize fileio. See fileio.c */
9245 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
9247 /* Take advantage of the fact that the LWP field is not used, to tag
9248 special ptids with it set to != 0. */
9249 magic_null_ptid
= ptid_build (42000, 1, -1);
9250 not_sent_ptid
= ptid_build (42000, 1, -2);
9251 any_thread_ptid
= ptid_build (42000, 1, 0);