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 /* The command code copies the documentation strings. */
871 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
875 legacy_name
= xstrprintf ("%s-packet", name
);
876 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
877 &remote_set_cmdlist
);
878 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
879 &remote_show_cmdlist
);
883 static enum packet_result
884 packet_check_result (const char *buf
)
888 /* The stub recognized the packet request. Check that the
889 operation succeeded. */
891 && isxdigit (buf
[1]) && isxdigit (buf
[2])
893 /* "Enn" - definitly an error. */
896 /* Always treat "E." as an error. This will be used for
897 more verbose error messages, such as E.memtypes. */
898 if (buf
[0] == 'E' && buf
[1] == '.')
901 /* The packet may or may not be OK. Just assume it is. */
905 /* The stub does not support the packet. */
906 return PACKET_UNKNOWN
;
909 static enum packet_result
910 packet_ok (const char *buf
, struct packet_config
*config
)
912 enum packet_result result
;
914 result
= packet_check_result (buf
);
919 /* The stub recognized the packet request. */
920 switch (config
->support
)
922 case PACKET_SUPPORT_UNKNOWN
:
924 fprintf_unfiltered (gdb_stdlog
,
925 "Packet %s (%s) is supported\n",
926 config
->name
, config
->title
);
927 config
->support
= PACKET_ENABLE
;
930 internal_error (__FILE__
, __LINE__
,
931 _("packet_ok: attempt to use a disabled packet"));
938 /* The stub does not support the packet. */
939 switch (config
->support
)
942 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
943 /* If the stub previously indicated that the packet was
944 supported then there is a protocol error.. */
945 error (_("Protocol error: %s (%s) conflicting enabled responses."),
946 config
->name
, config
->title
);
948 /* The user set it wrong. */
949 error (_("Enabled packet %s (%s) not recognized by stub"),
950 config
->name
, config
->title
);
952 case PACKET_SUPPORT_UNKNOWN
:
954 fprintf_unfiltered (gdb_stdlog
,
955 "Packet %s (%s) is NOT supported\n",
956 config
->name
, config
->title
);
957 config
->support
= PACKET_DISABLE
;
985 PACKET_qXfer_features
,
986 PACKET_qXfer_libraries
,
987 PACKET_qXfer_memory_map
,
988 PACKET_qXfer_spu_read
,
989 PACKET_qXfer_spu_write
,
994 PACKET_qSearch_memory
,
997 PACKET_QStartNoAckMode
,
999 PACKET_qXfer_siginfo_read
,
1000 PACKET_qXfer_siginfo_write
,
1002 PACKET_ConditionalTracepoints
,
1006 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1009 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
1010 struct cmd_list_element
*c
)
1012 struct packet_config
*packet
;
1014 for (packet
= remote_protocol_packets
;
1015 packet
< &remote_protocol_packets
[PACKET_MAX
];
1018 if (&packet
->detect
== c
->var
)
1020 update_packet_config (packet
);
1024 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1029 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1030 struct cmd_list_element
*c
,
1033 struct packet_config
*packet
;
1035 for (packet
= remote_protocol_packets
;
1036 packet
< &remote_protocol_packets
[PACKET_MAX
];
1039 if (&packet
->detect
== c
->var
)
1041 show_packet_config_cmd (packet
);
1045 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1049 /* Should we try one of the 'Z' requests? */
1053 Z_PACKET_SOFTWARE_BP
,
1054 Z_PACKET_HARDWARE_BP
,
1061 /* For compatibility with older distributions. Provide a ``set remote
1062 Z-packet ...'' command that updates all the Z packet types. */
1064 static enum auto_boolean remote_Z_packet_detect
;
1067 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1068 struct cmd_list_element
*c
)
1071 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1073 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1074 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1079 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1080 struct cmd_list_element
*c
,
1084 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1086 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1090 /* Should we try the 'ThreadInfo' query packet?
1092 This variable (NOT available to the user: auto-detect only!)
1093 determines whether GDB will use the new, simpler "ThreadInfo"
1094 query or the older, more complex syntax for thread queries.
1095 This is an auto-detect variable (set to true at each connect,
1096 and set to false when the target fails to recognize it). */
1098 static int use_threadinfo_query
;
1099 static int use_threadextra_query
;
1101 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1102 static struct async_signal_handler
*sigint_remote_twice_token
;
1103 static struct async_signal_handler
*sigint_remote_token
;
1106 /* Asynchronous signal handle registered as event loop source for
1107 when we have pending events ready to be passed to the core. */
1109 static struct async_event_handler
*remote_async_inferior_event_token
;
1111 /* Asynchronous signal handle registered as event loop source for when
1112 the remote sent us a %Stop notification. The registered callback
1113 will do a vStopped sequence to pull the rest of the events out of
1114 the remote side into our event queue. */
1116 static struct async_event_handler
*remote_async_get_pending_events_token
;
1119 static ptid_t magic_null_ptid
;
1120 static ptid_t not_sent_ptid
;
1121 static ptid_t any_thread_ptid
;
1123 /* These are the threads which we last sent to the remote system. The
1124 TID member will be -1 for all or -2 for not sent yet. */
1126 static ptid_t general_thread
;
1127 static ptid_t continue_thread
;
1129 /* Find out if the stub attached to PID (and hence GDB should offer to
1130 detach instead of killing it when bailing out). */
1133 remote_query_attached (int pid
)
1135 struct remote_state
*rs
= get_remote_state ();
1137 if (remote_protocol_packets
[PACKET_qAttached
].support
== PACKET_DISABLE
)
1140 if (remote_multi_process_p (rs
))
1141 sprintf (rs
->buf
, "qAttached:%x", pid
);
1143 sprintf (rs
->buf
, "qAttached");
1146 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1148 switch (packet_ok (rs
->buf
,
1149 &remote_protocol_packets
[PACKET_qAttached
]))
1152 if (strcmp (rs
->buf
, "1") == 0)
1156 warning (_("Remote failure reply: %s"), rs
->buf
);
1158 case PACKET_UNKNOWN
:
1165 /* Add PID to GDB's inferior table. Since we can be connected to a
1166 remote system before before knowing about any inferior, mark the
1167 target with execution when we find the first inferior. If ATTACHED
1168 is 1, then we had just attached to this inferior. If it is 0, then
1169 we just created this inferior. If it is -1, then try querying the
1170 remote stub to find out if it had attached to the inferior or
1173 static struct inferior
*
1174 remote_add_inferior (int pid
, int attached
)
1176 struct inferior
*inf
;
1178 /* Check whether this process we're learning about is to be
1179 considered attached, or if is to be considered to have been
1180 spawned by the stub. */
1182 attached
= remote_query_attached (pid
);
1184 inf
= add_inferior (pid
);
1186 inf
->attach_flag
= attached
;
1191 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1192 according to RUNNING. */
1195 remote_add_thread (ptid_t ptid
, int running
)
1199 set_executing (ptid
, running
);
1200 set_running (ptid
, running
);
1203 /* Come here when we learn about a thread id from the remote target.
1204 It may be the first time we hear about such thread, so take the
1205 opportunity to add it to GDB's thread list. In case this is the
1206 first time we're noticing its corresponding inferior, add it to
1207 GDB's inferior list as well. */
1210 remote_notice_new_inferior (ptid_t currthread
, int running
)
1212 /* If this is a new thread, add it to GDB's thread list.
1213 If we leave it up to WFI to do this, bad things will happen. */
1215 if (in_thread_list (currthread
) && is_exited (currthread
))
1217 /* We're seeing an event on a thread id we knew had exited.
1218 This has to be a new thread reusing the old id. Add it. */
1219 remote_add_thread (currthread
, running
);
1223 if (!in_thread_list (currthread
))
1225 struct inferior
*inf
= NULL
;
1226 int pid
= ptid_get_pid (currthread
);
1228 if (ptid_is_pid (inferior_ptid
)
1229 && pid
== ptid_get_pid (inferior_ptid
))
1231 /* inferior_ptid has no thread member yet. This can happen
1232 with the vAttach -> remote_wait,"TAAthread:" path if the
1233 stub doesn't support qC. This is the first stop reported
1234 after an attach, so this is the main thread. Update the
1235 ptid in the thread list. */
1236 if (in_thread_list (pid_to_ptid (pid
)))
1237 thread_change_ptid (inferior_ptid
, currthread
);
1240 remote_add_thread (currthread
, running
);
1241 inferior_ptid
= currthread
;
1246 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1248 /* inferior_ptid is not set yet. This can happen with the
1249 vRun -> remote_wait,"TAAthread:" path if the stub
1250 doesn't support qC. This is the first stop reported
1251 after an attach, so this is the main thread. Update the
1252 ptid in the thread list. */
1253 thread_change_ptid (inferior_ptid
, currthread
);
1257 /* When connecting to a target remote, or to a target
1258 extended-remote which already was debugging an inferior, we
1259 may not know about it yet. Add it before adding its child
1260 thread, so notifications are emitted in a sensible order. */
1261 if (!in_inferior_list (ptid_get_pid (currthread
)))
1262 inf
= remote_add_inferior (ptid_get_pid (currthread
), -1);
1264 /* This is really a new thread. Add it. */
1265 remote_add_thread (currthread
, running
);
1267 /* If we found a new inferior, let the common code do whatever
1268 it needs to with it (e.g., read shared libraries, insert
1271 notice_new_inferior (currthread
, running
, 0);
1275 /* Call this function as a result of
1276 1) A halt indication (T packet) containing a thread id
1277 2) A direct query of currthread
1278 3) Successful execution of set thread
1282 record_currthread (ptid_t currthread
)
1284 general_thread
= currthread
;
1286 if (ptid_equal (currthread
, minus_one_ptid
))
1287 /* We're just invalidating the local thread mirror. */
1290 remote_notice_new_inferior (currthread
, 0);
1293 static char *last_pass_packet
;
1295 /* If 'QPassSignals' is supported, tell the remote stub what signals
1296 it can simply pass through to the inferior without reporting. */
1299 remote_pass_signals (void)
1301 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1303 char *pass_packet
, *p
;
1304 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1307 gdb_assert (numsigs
< 256);
1308 for (i
= 0; i
< numsigs
; i
++)
1310 if (signal_stop_state (i
) == 0
1311 && signal_print_state (i
) == 0
1312 && signal_pass_state (i
) == 1)
1315 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1316 strcpy (pass_packet
, "QPassSignals:");
1317 p
= pass_packet
+ strlen (pass_packet
);
1318 for (i
= 0; i
< numsigs
; i
++)
1320 if (signal_stop_state (i
) == 0
1321 && signal_print_state (i
) == 0
1322 && signal_pass_state (i
) == 1)
1325 *p
++ = tohex (i
>> 4);
1326 *p
++ = tohex (i
& 15);
1335 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1337 struct remote_state
*rs
= get_remote_state ();
1338 char *buf
= rs
->buf
;
1340 putpkt (pass_packet
);
1341 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1342 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1343 if (last_pass_packet
)
1344 xfree (last_pass_packet
);
1345 last_pass_packet
= pass_packet
;
1348 xfree (pass_packet
);
1352 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1353 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1354 thread. If GEN is set, set the general thread, if not, then set
1355 the step/continue thread. */
1357 set_thread (struct ptid ptid
, int gen
)
1359 struct remote_state
*rs
= get_remote_state ();
1360 ptid_t state
= gen
? general_thread
: continue_thread
;
1361 char *buf
= rs
->buf
;
1362 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
1364 if (ptid_equal (state
, ptid
))
1368 *buf
++ = gen
? 'g' : 'c';
1369 if (ptid_equal (ptid
, magic_null_ptid
))
1370 xsnprintf (buf
, endbuf
- buf
, "0");
1371 else if (ptid_equal (ptid
, any_thread_ptid
))
1372 xsnprintf (buf
, endbuf
- buf
, "0");
1373 else if (ptid_equal (ptid
, minus_one_ptid
))
1374 xsnprintf (buf
, endbuf
- buf
, "-1");
1376 write_ptid (buf
, endbuf
, ptid
);
1378 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1380 general_thread
= ptid
;
1382 continue_thread
= ptid
;
1386 set_general_thread (struct ptid ptid
)
1388 set_thread (ptid
, 1);
1392 set_continue_thread (struct ptid ptid
)
1394 set_thread (ptid
, 0);
1397 /* Change the remote current process. Which thread within the process
1398 ends up selected isn't important, as long as it is the same process
1399 as what INFERIOR_PTID points to.
1401 This comes from that fact that there is no explicit notion of
1402 "selected process" in the protocol. The selected process for
1403 general operations is the process the selected general thread
1407 set_general_process (void)
1409 struct remote_state
*rs
= get_remote_state ();
1411 /* If the remote can't handle multiple processes, don't bother. */
1412 if (!remote_multi_process_p (rs
))
1415 /* We only need to change the remote current thread if it's pointing
1416 at some other process. */
1417 if (ptid_get_pid (general_thread
) != ptid_get_pid (inferior_ptid
))
1418 set_general_thread (inferior_ptid
);
1422 /* Return nonzero if the thread PTID is still alive on the remote
1426 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
1428 struct remote_state
*rs
= get_remote_state ();
1431 if (ptid_equal (ptid
, magic_null_ptid
))
1432 /* The main thread is always alive. */
1435 if (ptid_get_pid (ptid
) != 0 && ptid_get_tid (ptid
) == 0)
1436 /* The main thread is always alive. This can happen after a
1437 vAttach, if the remote side doesn't support
1442 endp
= rs
->buf
+ get_remote_packet_size ();
1445 write_ptid (p
, endp
, ptid
);
1448 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1449 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1452 /* About these extended threadlist and threadinfo packets. They are
1453 variable length packets but, the fields within them are often fixed
1454 length. They are redundent enough to send over UDP as is the
1455 remote protocol in general. There is a matching unit test module
1458 #define OPAQUETHREADBYTES 8
1460 /* a 64 bit opaque identifier */
1461 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1463 /* WARNING: This threadref data structure comes from the remote O.S.,
1464 libstub protocol encoding, and remote.c. it is not particularly
1467 /* Right now, the internal structure is int. We want it to be bigger.
1471 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1473 /* gdb_ext_thread_info is an internal GDB data structure which is
1474 equivalent to the reply of the remote threadinfo packet. */
1476 struct gdb_ext_thread_info
1478 threadref threadid
; /* External form of thread reference. */
1479 int active
; /* Has state interesting to GDB?
1481 char display
[256]; /* Brief state display, name,
1482 blocked/suspended. */
1483 char shortname
[32]; /* To be used to name threads. */
1484 char more_display
[256]; /* Long info, statistics, queue depth,
1488 /* The volume of remote transfers can be limited by submitting
1489 a mask containing bits specifying the desired information.
1490 Use a union of these values as the 'selection' parameter to
1491 get_thread_info. FIXME: Make these TAG names more thread specific.
1494 #define TAG_THREADID 1
1495 #define TAG_EXISTS 2
1496 #define TAG_DISPLAY 4
1497 #define TAG_THREADNAME 8
1498 #define TAG_MOREDISPLAY 16
1500 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1502 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1504 static char *unpack_nibble (char *buf
, int *val
);
1506 static char *pack_nibble (char *buf
, int nibble
);
1508 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1510 static char *unpack_byte (char *buf
, int *value
);
1512 static char *pack_int (char *buf
, int value
);
1514 static char *unpack_int (char *buf
, int *value
);
1516 static char *unpack_string (char *src
, char *dest
, int length
);
1518 static char *pack_threadid (char *pkt
, threadref
*id
);
1520 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1522 void int_to_threadref (threadref
*id
, int value
);
1524 static int threadref_to_int (threadref
*ref
);
1526 static void copy_threadref (threadref
*dest
, threadref
*src
);
1528 static int threadmatch (threadref
*dest
, threadref
*src
);
1530 static char *pack_threadinfo_request (char *pkt
, int mode
,
1533 static int remote_unpack_thread_info_response (char *pkt
,
1534 threadref
*expectedref
,
1535 struct gdb_ext_thread_info
1539 static int remote_get_threadinfo (threadref
*threadid
,
1540 int fieldset
, /*TAG mask */
1541 struct gdb_ext_thread_info
*info
);
1543 static char *pack_threadlist_request (char *pkt
, int startflag
,
1545 threadref
*nextthread
);
1547 static int parse_threadlist_response (char *pkt
,
1549 threadref
*original_echo
,
1550 threadref
*resultlist
,
1553 static int remote_get_threadlist (int startflag
,
1554 threadref
*nextthread
,
1558 threadref
*threadlist
);
1560 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1562 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1563 void *context
, int looplimit
);
1565 static int remote_newthread_step (threadref
*ref
, void *context
);
1568 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1569 buffer we're allowed to write to. Returns
1570 BUF+CHARACTERS_WRITTEN. */
1573 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
1576 struct remote_state
*rs
= get_remote_state ();
1578 if (remote_multi_process_p (rs
))
1580 pid
= ptid_get_pid (ptid
);
1582 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
1584 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
1586 tid
= ptid_get_tid (ptid
);
1588 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
1590 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
1595 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1596 passed the last parsed char. Returns null_ptid on error. */
1599 read_ptid (char *buf
, char **obuf
)
1603 ULONGEST pid
= 0, tid
= 0;
1607 /* Multi-process ptid. */
1608 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1610 error (_("invalid remote ptid: %s\n"), p
);
1613 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1616 return ptid_build (pid
, 0, tid
);
1619 /* No multi-process. Just a tid. */
1620 pp
= unpack_varlen_hex (p
, &tid
);
1622 /* Since the stub is not sending a process id, then default to
1623 what's in inferior_ptid, unless it's null at this point. If so,
1624 then since there's no way to know the pid of the reported
1625 threads, use the magic number. */
1626 if (ptid_equal (inferior_ptid
, null_ptid
))
1627 pid
= ptid_get_pid (magic_null_ptid
);
1629 pid
= ptid_get_pid (inferior_ptid
);
1633 return ptid_build (pid
, 0, tid
);
1636 /* Encode 64 bits in 16 chars of hex. */
1638 static const char hexchars
[] = "0123456789abcdef";
1641 ishex (int ch
, int *val
)
1643 if ((ch
>= 'a') && (ch
<= 'f'))
1645 *val
= ch
- 'a' + 10;
1648 if ((ch
>= 'A') && (ch
<= 'F'))
1650 *val
= ch
- 'A' + 10;
1653 if ((ch
>= '0') && (ch
<= '9'))
1664 if (ch
>= 'a' && ch
<= 'f')
1665 return ch
- 'a' + 10;
1666 if (ch
>= '0' && ch
<= '9')
1668 if (ch
>= 'A' && ch
<= 'F')
1669 return ch
- 'A' + 10;
1674 stub_unpack_int (char *buff
, int fieldlength
)
1681 nibble
= stubhex (*buff
++);
1685 retval
= retval
<< 4;
1691 unpack_varlen_hex (char *buff
, /* packet to parse */
1695 ULONGEST retval
= 0;
1697 while (ishex (*buff
, &nibble
))
1700 retval
= retval
<< 4;
1701 retval
|= nibble
& 0x0f;
1708 unpack_nibble (char *buf
, int *val
)
1710 *val
= fromhex (*buf
++);
1715 pack_nibble (char *buf
, int nibble
)
1717 *buf
++ = hexchars
[(nibble
& 0x0f)];
1722 pack_hex_byte (char *pkt
, int byte
)
1724 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1725 *pkt
++ = hexchars
[(byte
& 0xf)];
1730 unpack_byte (char *buf
, int *value
)
1732 *value
= stub_unpack_int (buf
, 2);
1737 pack_int (char *buf
, int value
)
1739 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1740 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1741 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1742 buf
= pack_hex_byte (buf
, (value
& 0xff));
1747 unpack_int (char *buf
, int *value
)
1749 *value
= stub_unpack_int (buf
, 8);
1753 #if 0 /* Currently unused, uncomment when needed. */
1754 static char *pack_string (char *pkt
, char *string
);
1757 pack_string (char *pkt
, char *string
)
1762 len
= strlen (string
);
1764 len
= 200; /* Bigger than most GDB packets, junk??? */
1765 pkt
= pack_hex_byte (pkt
, len
);
1769 if ((ch
== '\0') || (ch
== '#'))
1770 ch
= '*'; /* Protect encapsulation. */
1775 #endif /* 0 (unused) */
1778 unpack_string (char *src
, char *dest
, int length
)
1787 pack_threadid (char *pkt
, threadref
*id
)
1790 unsigned char *altid
;
1792 altid
= (unsigned char *) id
;
1793 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1795 pkt
= pack_hex_byte (pkt
, *altid
++);
1801 unpack_threadid (char *inbuf
, threadref
*id
)
1804 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1807 altref
= (char *) id
;
1809 while (inbuf
< limit
)
1811 x
= stubhex (*inbuf
++);
1812 y
= stubhex (*inbuf
++);
1813 *altref
++ = (x
<< 4) | y
;
1818 /* Externally, threadrefs are 64 bits but internally, they are still
1819 ints. This is due to a mismatch of specifications. We would like
1820 to use 64bit thread references internally. This is an adapter
1824 int_to_threadref (threadref
*id
, int value
)
1826 unsigned char *scan
;
1828 scan
= (unsigned char *) id
;
1834 *scan
++ = (value
>> 24) & 0xff;
1835 *scan
++ = (value
>> 16) & 0xff;
1836 *scan
++ = (value
>> 8) & 0xff;
1837 *scan
++ = (value
& 0xff);
1841 threadref_to_int (threadref
*ref
)
1844 unsigned char *scan
;
1850 value
= (value
<< 8) | ((*scan
++) & 0xff);
1855 copy_threadref (threadref
*dest
, threadref
*src
)
1858 unsigned char *csrc
, *cdest
;
1860 csrc
= (unsigned char *) src
;
1861 cdest
= (unsigned char *) dest
;
1868 threadmatch (threadref
*dest
, threadref
*src
)
1870 /* Things are broken right now, so just assume we got a match. */
1872 unsigned char *srcp
, *destp
;
1874 srcp
= (char *) src
;
1875 destp
= (char *) dest
;
1879 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1886 threadid:1, # always request threadid
1893 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1896 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1898 *pkt
++ = 'q'; /* Info Query */
1899 *pkt
++ = 'P'; /* process or thread info */
1900 pkt
= pack_int (pkt
, mode
); /* mode */
1901 pkt
= pack_threadid (pkt
, id
); /* threadid */
1902 *pkt
= '\0'; /* terminate */
1906 /* These values tag the fields in a thread info response packet. */
1907 /* Tagging the fields allows us to request specific fields and to
1908 add more fields as time goes by. */
1910 #define TAG_THREADID 1 /* Echo the thread identifier. */
1911 #define TAG_EXISTS 2 /* Is this process defined enough to
1912 fetch registers and its stack? */
1913 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1914 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1915 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1919 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1920 struct gdb_ext_thread_info
*info
)
1922 struct remote_state
*rs
= get_remote_state ();
1926 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1929 /* info->threadid = 0; FIXME: implement zero_threadref. */
1931 info
->display
[0] = '\0';
1932 info
->shortname
[0] = '\0';
1933 info
->more_display
[0] = '\0';
1935 /* Assume the characters indicating the packet type have been
1937 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1938 pkt
= unpack_threadid (pkt
, &ref
);
1941 warning (_("Incomplete response to threadinfo request."));
1942 if (!threadmatch (&ref
, expectedref
))
1943 { /* This is an answer to a different request. */
1944 warning (_("ERROR RMT Thread info mismatch."));
1947 copy_threadref (&info
->threadid
, &ref
);
1949 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1951 /* Packets are terminated with nulls. */
1952 while ((pkt
< limit
) && mask
&& *pkt
)
1954 pkt
= unpack_int (pkt
, &tag
); /* tag */
1955 pkt
= unpack_byte (pkt
, &length
); /* length */
1956 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1958 warning (_("ERROR RMT: threadinfo tag mismatch."));
1962 if (tag
== TAG_THREADID
)
1966 warning (_("ERROR RMT: length of threadid is not 16."));
1970 pkt
= unpack_threadid (pkt
, &ref
);
1971 mask
= mask
& ~TAG_THREADID
;
1974 if (tag
== TAG_EXISTS
)
1976 info
->active
= stub_unpack_int (pkt
, length
);
1978 mask
= mask
& ~(TAG_EXISTS
);
1981 warning (_("ERROR RMT: 'exists' length too long."));
1987 if (tag
== TAG_THREADNAME
)
1989 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1990 mask
= mask
& ~TAG_THREADNAME
;
1993 if (tag
== TAG_DISPLAY
)
1995 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1996 mask
= mask
& ~TAG_DISPLAY
;
1999 if (tag
== TAG_MOREDISPLAY
)
2001 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2002 mask
= mask
& ~TAG_MOREDISPLAY
;
2005 warning (_("ERROR RMT: unknown thread info tag."));
2006 break; /* Not a tag we know about. */
2012 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2013 struct gdb_ext_thread_info
*info
)
2015 struct remote_state
*rs
= get_remote_state ();
2018 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2020 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2022 if (rs
->buf
[0] == '\0')
2025 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2030 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2033 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2034 threadref
*nextthread
)
2036 *pkt
++ = 'q'; /* info query packet */
2037 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2038 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2039 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2040 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2045 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2048 parse_threadlist_response (char *pkt
, int result_limit
,
2049 threadref
*original_echo
, threadref
*resultlist
,
2052 struct remote_state
*rs
= get_remote_state ();
2054 int count
, resultcount
, done
;
2057 /* Assume the 'q' and 'M chars have been stripped. */
2058 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2059 /* done parse past here */
2060 pkt
= unpack_byte (pkt
, &count
); /* count field */
2061 pkt
= unpack_nibble (pkt
, &done
);
2062 /* The first threadid is the argument threadid. */
2063 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2064 while ((count
-- > 0) && (pkt
< limit
))
2066 pkt
= unpack_threadid (pkt
, resultlist
++);
2067 if (resultcount
++ >= result_limit
)
2076 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2077 int *done
, int *result_count
, threadref
*threadlist
)
2079 struct remote_state
*rs
= get_remote_state ();
2080 static threadref echo_nextthread
;
2083 /* Trancate result limit to be smaller than the packet size. */
2084 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
2085 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2087 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2089 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2091 if (*rs
->buf
== '\0')
2095 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
2098 if (!threadmatch (&echo_nextthread
, nextthread
))
2100 /* FIXME: This is a good reason to drop the packet. */
2101 /* Possably, there is a duplicate response. */
2103 retransmit immediatly - race conditions
2104 retransmit after timeout - yes
2106 wait for packet, then exit
2108 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2109 return 0; /* I choose simply exiting. */
2111 if (*result_count
<= 0)
2115 warning (_("RMT ERROR : failed to get remote thread list."));
2118 return result
; /* break; */
2120 if (*result_count
> result_limit
)
2123 warning (_("RMT ERROR: threadlist response longer than requested."));
2129 /* This is the interface between remote and threads, remotes upper
2132 /* remote_find_new_threads retrieves the thread list and for each
2133 thread in the list, looks up the thread in GDB's internal list,
2134 adding the thread if it does not already exist. This involves
2135 getting partial thread lists from the remote target so, polling the
2136 quit_flag is required. */
2139 /* About this many threadisds fit in a packet. */
2141 #define MAXTHREADLISTRESULTS 32
2144 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2147 int done
, i
, result_count
;
2151 static threadref nextthread
;
2152 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
2157 if (loopcount
++ > looplimit
)
2160 warning (_("Remote fetch threadlist -infinite loop-."));
2163 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
2164 &done
, &result_count
, resultthreadlist
))
2169 /* Clear for later iterations. */
2171 /* Setup to resume next batch of thread references, set nextthread. */
2172 if (result_count
>= 1)
2173 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2175 while (result_count
--)
2176 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2183 remote_newthread_step (threadref
*ref
, void *context
)
2185 int pid
= ptid_get_pid (inferior_ptid
);
2186 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2188 if (!in_thread_list (ptid
))
2190 return 1; /* continue iterator */
2193 #define CRAZY_MAX_THREADS 1000
2196 remote_current_thread (ptid_t oldpid
)
2198 struct remote_state
*rs
= get_remote_state ();
2201 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2202 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2203 return read_ptid (&rs
->buf
[2], NULL
);
2208 /* Find new threads for info threads command.
2209 * Original version, using John Metzler's thread protocol.
2213 remote_find_new_threads (void)
2215 remote_threadlist_iterator (remote_newthread_step
, 0,
2220 * Find all threads for info threads command.
2221 * Uses new thread protocol contributed by Cisco.
2222 * Falls back and attempts to use the older method (above)
2223 * if the target doesn't respond to the new method.
2227 remote_threads_info (struct target_ops
*ops
)
2229 struct remote_state
*rs
= get_remote_state ();
2233 if (remote_desc
== 0) /* paranoia */
2234 error (_("Command can only be used when connected to the remote target."));
2236 if (use_threadinfo_query
)
2238 putpkt ("qfThreadInfo");
2239 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2241 if (bufp
[0] != '\0') /* q packet recognized */
2243 while (*bufp
++ == 'm') /* reply contains one or more TID */
2247 new_thread
= read_ptid (bufp
, &bufp
);
2248 if (!ptid_equal (new_thread
, null_ptid
))
2250 /* In non-stop mode, we assume new found threads
2251 are running until proven otherwise with a
2252 stop reply. In all-stop, we can only get
2253 here if all threads are stopped. */
2254 int running
= non_stop
? 1 : 0;
2256 remote_notice_new_inferior (new_thread
, running
);
2259 while (*bufp
++ == ','); /* comma-separated list */
2260 putpkt ("qsThreadInfo");
2261 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2268 /* Only qfThreadInfo is supported in non-stop mode. */
2272 /* Else fall back to old method based on jmetzler protocol. */
2273 use_threadinfo_query
= 0;
2274 remote_find_new_threads ();
2279 * Collect a descriptive string about the given thread.
2280 * The target may say anything it wants to about the thread
2281 * (typically info about its blocked / runnable state, name, etc.).
2282 * This string will appear in the info threads display.
2284 * Optional: targets are not required to implement this function.
2288 remote_threads_extra_info (struct thread_info
*tp
)
2290 struct remote_state
*rs
= get_remote_state ();
2294 struct gdb_ext_thread_info threadinfo
;
2295 static char display_buf
[100]; /* arbitrary... */
2296 int n
= 0; /* position in display_buf */
2298 if (remote_desc
== 0) /* paranoia */
2299 internal_error (__FILE__
, __LINE__
,
2300 _("remote_threads_extra_info"));
2302 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2303 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2304 /* This is the main thread which was added by GDB. The remote
2305 server doesn't know about it. */
2308 if (use_threadextra_query
)
2311 char *endb
= rs
->buf
+ get_remote_packet_size ();
2313 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2315 write_ptid (b
, endb
, tp
->ptid
);
2318 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2319 if (rs
->buf
[0] != 0)
2321 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2322 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2323 display_buf
[result
] = '\0';
2328 /* If the above query fails, fall back to the old method. */
2329 use_threadextra_query
= 0;
2330 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2331 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2332 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2333 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2334 if (threadinfo
.active
)
2336 if (*threadinfo
.shortname
)
2337 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2338 " Name: %s,", threadinfo
.shortname
);
2339 if (*threadinfo
.display
)
2340 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2341 " State: %s,", threadinfo
.display
);
2342 if (*threadinfo
.more_display
)
2343 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2344 " Priority: %s", threadinfo
.more_display
);
2348 /* For purely cosmetic reasons, clear up trailing commas. */
2349 if (',' == display_buf
[n
-1])
2350 display_buf
[n
-1] = ' ';
2358 /* Restart the remote side; this is an extended protocol operation. */
2361 extended_remote_restart (void)
2363 struct remote_state
*rs
= get_remote_state ();
2365 /* Send the restart command; for reasons I don't understand the
2366 remote side really expects a number after the "R". */
2367 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2370 remote_fileio_reset ();
2373 /* Clean up connection to a remote debugger. */
2376 remote_close (int quitting
)
2378 if (remote_desc
== NULL
)
2379 return; /* already closed */
2381 /* Make sure we leave stdin registered in the event loop, and we
2382 don't leave the async SIGINT signal handler installed. */
2383 remote_terminal_ours ();
2385 serial_close (remote_desc
);
2388 /* We don't have a connection to the remote stub anymore. Get rid
2389 of all the inferiors and their threads we were controlling. */
2390 discard_all_inferiors ();
2392 /* We're no longer interested in any of these events. */
2393 discard_pending_stop_replies (-1);
2395 if (remote_async_inferior_event_token
)
2396 delete_async_event_handler (&remote_async_inferior_event_token
);
2397 if (remote_async_get_pending_events_token
)
2398 delete_async_event_handler (&remote_async_get_pending_events_token
);
2401 /* Query the remote side for the text, data and bss offsets. */
2406 struct remote_state
*rs
= get_remote_state ();
2409 int lose
, num_segments
= 0, do_sections
, do_segments
;
2410 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2411 struct section_offsets
*offs
;
2412 struct symfile_segment_data
*data
;
2414 if (symfile_objfile
== NULL
)
2417 putpkt ("qOffsets");
2418 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2421 if (buf
[0] == '\000')
2422 return; /* Return silently. Stub doesn't support
2426 warning (_("Remote failure reply: %s"), buf
);
2430 /* Pick up each field in turn. This used to be done with scanf, but
2431 scanf will make trouble if CORE_ADDR size doesn't match
2432 conversion directives correctly. The following code will work
2433 with any size of CORE_ADDR. */
2434 text_addr
= data_addr
= bss_addr
= 0;
2438 if (strncmp (ptr
, "Text=", 5) == 0)
2441 /* Don't use strtol, could lose on big values. */
2442 while (*ptr
&& *ptr
!= ';')
2443 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2445 if (strncmp (ptr
, ";Data=", 6) == 0)
2448 while (*ptr
&& *ptr
!= ';')
2449 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2454 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2457 while (*ptr
&& *ptr
!= ';')
2458 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2460 if (bss_addr
!= data_addr
)
2461 warning (_("Target reported unsupported offsets: %s"), buf
);
2466 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
2469 /* Don't use strtol, could lose on big values. */
2470 while (*ptr
&& *ptr
!= ';')
2471 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2474 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
2477 while (*ptr
&& *ptr
!= ';')
2478 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2486 error (_("Malformed response to offset query, %s"), buf
);
2487 else if (*ptr
!= '\0')
2488 warning (_("Target reported unsupported offsets: %s"), buf
);
2490 offs
= ((struct section_offsets
*)
2491 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2492 memcpy (offs
, symfile_objfile
->section_offsets
,
2493 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2495 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
2496 do_segments
= (data
!= NULL
);
2497 do_sections
= num_segments
== 0;
2499 if (num_segments
> 0)
2501 segments
[0] = text_addr
;
2502 segments
[1] = data_addr
;
2504 /* If we have two segments, we can still try to relocate everything
2505 by assuming that the .text and .data offsets apply to the whole
2506 text and data segments. Convert the offsets given in the packet
2507 to base addresses for symfile_map_offsets_to_segments. */
2508 else if (data
&& data
->num_segments
== 2)
2510 segments
[0] = data
->segment_bases
[0] + text_addr
;
2511 segments
[1] = data
->segment_bases
[1] + data_addr
;
2514 /* If the object file has only one segment, assume that it is text
2515 rather than data; main programs with no writable data are rare,
2516 but programs with no code are useless. Of course the code might
2517 have ended up in the data segment... to detect that we would need
2518 the permissions here. */
2519 else if (data
&& data
->num_segments
== 1)
2521 segments
[0] = data
->segment_bases
[0] + text_addr
;
2524 /* There's no way to relocate by segment. */
2530 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
2531 offs
, num_segments
, segments
);
2533 if (ret
== 0 && !do_sections
)
2534 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2541 free_symfile_segment_data (data
);
2545 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2547 /* This is a temporary kludge to force data and bss to use the same offsets
2548 because that's what nlmconv does now. The real solution requires changes
2549 to the stub and remote.c that I don't have time to do right now. */
2551 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2552 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2555 objfile_relocate (symfile_objfile
, offs
);
2558 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2559 threads we know are stopped already. This is used during the
2560 initial remote connection in non-stop mode --- threads that are
2561 reported as already being stopped are left stopped. */
2564 set_stop_requested_callback (struct thread_info
*thread
, void *data
)
2566 /* If we have a stop reply for this thread, it must be stopped. */
2567 if (peek_stop_reply (thread
->ptid
))
2568 set_stop_requested (thread
->ptid
, 1);
2573 /* Stub for catch_exception. */
2575 struct start_remote_args
2579 /* The current target. */
2580 struct target_ops
*target
;
2582 /* Non-zero if this is an extended-remote target. */
2587 remote_start_remote (struct ui_out
*uiout
, void *opaque
)
2589 struct start_remote_args
*args
= opaque
;
2590 struct remote_state
*rs
= get_remote_state ();
2591 struct packet_config
*noack_config
;
2592 char *wait_status
= NULL
;
2594 immediate_quit
++; /* Allow user to interrupt it. */
2596 /* Ack any packet which the remote side has already sent. */
2597 serial_write (remote_desc
, "+", 1);
2599 /* The first packet we send to the target is the optional "supported
2600 packets" request. If the target can answer this, it will tell us
2601 which later probes to skip. */
2602 remote_query_supported ();
2604 /* Next, we possibly activate noack mode.
2606 If the QStartNoAckMode packet configuration is set to AUTO,
2607 enable noack mode if the stub reported a wish for it with
2610 If set to TRUE, then enable noack mode even if the stub didn't
2611 report it in qSupported. If the stub doesn't reply OK, the
2612 session ends with an error.
2614 If FALSE, then don't activate noack mode, regardless of what the
2615 stub claimed should be the default with qSupported. */
2617 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
2619 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
2620 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
2621 && noack_config
->support
== PACKET_ENABLE
))
2623 putpkt ("QStartNoAckMode");
2624 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2625 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
2629 if (args
->extended_p
)
2631 /* Tell the remote that we are using the extended protocol. */
2633 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2636 /* Next, if the target can specify a description, read it. We do
2637 this before anything involving memory or registers. */
2638 target_find_description ();
2640 /* On OSs where the list of libraries is global to all
2641 processes, we fetch them early. */
2642 if (gdbarch_has_global_solist (target_gdbarch
))
2643 solib_add (NULL
, args
->from_tty
, args
->target
, auto_solib_add
);
2647 if (!rs
->non_stop_aware
)
2648 error (_("Non-stop mode requested, but remote does not support non-stop"));
2650 putpkt ("QNonStop:1");
2651 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2653 if (strcmp (rs
->buf
, "OK") != 0)
2654 error ("Remote refused setting non-stop mode with: %s", rs
->buf
);
2656 /* Find about threads and processes the stub is already
2657 controlling. We default to adding them in the running state.
2658 The '?' query below will then tell us about which threads are
2660 remote_threads_info (args
->target
);
2662 else if (rs
->non_stop_aware
)
2664 /* Don't assume that the stub can operate in all-stop mode.
2665 Request it explicitely. */
2666 putpkt ("QNonStop:0");
2667 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2669 if (strcmp (rs
->buf
, "OK") != 0)
2670 error ("Remote refused setting all-stop mode with: %s", rs
->buf
);
2673 /* Check whether the target is running now. */
2675 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2679 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
2681 if (!args
->extended_p
)
2682 error (_("The target is not running (try extended-remote?)"));
2684 /* We're connected, but not running. Drop out before we
2685 call start_remote. */
2690 /* Save the reply for later. */
2691 wait_status
= alloca (strlen (rs
->buf
) + 1);
2692 strcpy (wait_status
, rs
->buf
);
2695 /* Let the stub know that we want it to return the thread. */
2696 set_continue_thread (minus_one_ptid
);
2698 /* Without this, some commands which require an active target
2699 (such as kill) won't work. This variable serves (at least)
2700 double duty as both the pid of the target process (if it has
2701 such), and as a flag indicating that a target is active.
2702 These functions should be split out into seperate variables,
2703 especially since GDB will someday have a notion of debugging
2704 several processes. */
2705 inferior_ptid
= magic_null_ptid
;
2707 /* Now, if we have thread information, update inferior_ptid. */
2708 inferior_ptid
= remote_current_thread (inferior_ptid
);
2710 remote_add_inferior (ptid_get_pid (inferior_ptid
), -1);
2712 /* Always add the main thread. */
2713 add_thread_silent (inferior_ptid
);
2715 get_offsets (); /* Get text, data & bss offsets. */
2717 /* If we could not find a description using qXfer, and we know
2718 how to do it some other way, try again. This is not
2719 supported for non-stop; it could be, but it is tricky if
2720 there are no stopped threads when we connect. */
2721 if (remote_read_description_p (args
->target
)
2722 && gdbarch_target_desc (target_gdbarch
) == NULL
)
2724 target_clear_description ();
2725 target_find_description ();
2728 /* Use the previously fetched status. */
2729 gdb_assert (wait_status
!= NULL
);
2730 strcpy (rs
->buf
, wait_status
);
2731 rs
->cached_wait_status
= 1;
2734 start_remote (args
->from_tty
); /* Initialize gdb process mechanisms. */
2738 /* Clear WFI global state. Do this before finding about new
2739 threads and inferiors, and setting the current inferior.
2740 Otherwise we would clear the proceed status of the current
2741 inferior when we want its stop_soon state to be preserved
2742 (see notice_new_inferior). */
2743 init_wait_for_inferior ();
2745 /* In non-stop, we will either get an "OK", meaning that there
2746 are no stopped threads at this time; or, a regular stop
2747 reply. In the latter case, there may be more than one thread
2748 stopped --- we pull them all out using the vStopped
2750 if (strcmp (rs
->buf
, "OK") != 0)
2752 struct stop_reply
*stop_reply
;
2753 struct cleanup
*old_chain
;
2755 stop_reply
= stop_reply_xmalloc ();
2756 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
2758 remote_parse_stop_reply (rs
->buf
, stop_reply
);
2759 discard_cleanups (old_chain
);
2761 /* get_pending_stop_replies acks this one, and gets the rest
2763 pending_stop_reply
= stop_reply
;
2764 remote_get_pending_stop_replies ();
2766 /* Make sure that threads that were stopped remain
2768 iterate_over_threads (set_stop_requested_callback
, NULL
);
2771 if (target_can_async_p ())
2772 target_async (inferior_event_handler
, 0);
2774 if (thread_count () == 0)
2776 if (!args
->extended_p
)
2777 error (_("The target is not running (try extended-remote?)"));
2779 /* We're connected, but not running. Drop out before we
2780 call start_remote. */
2784 /* Let the stub know that we want it to return the thread. */
2786 /* Force the stub to choose a thread. */
2787 set_general_thread (null_ptid
);
2790 inferior_ptid
= remote_current_thread (minus_one_ptid
);
2791 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
2792 error (_("remote didn't report the current thread in non-stop mode"));
2794 get_offsets (); /* Get text, data & bss offsets. */
2796 /* In non-stop mode, any cached wait status will be stored in
2797 the stop reply queue. */
2798 gdb_assert (wait_status
== NULL
);
2801 /* If we connected to a live target, do some additional setup. */
2802 if (target_has_execution
)
2804 if (exec_bfd
) /* No use without an exec file. */
2805 remote_check_symbols (symfile_objfile
);
2808 /* If breakpoints are global, insert them now. */
2809 if (gdbarch_has_global_breakpoints (target_gdbarch
)
2810 && breakpoints_always_inserted_mode ())
2811 insert_breakpoints ();
2814 /* Open a connection to a remote debugger.
2815 NAME is the filename used for communication. */
2818 remote_open (char *name
, int from_tty
)
2820 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2823 /* Open a connection to a remote debugger using the extended
2824 remote gdb protocol. NAME is the filename used for communication. */
2827 extended_remote_open (char *name
, int from_tty
)
2829 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
2832 /* Generic code for opening a connection to a remote target. */
2835 init_all_packet_configs (void)
2838 for (i
= 0; i
< PACKET_MAX
; i
++)
2839 update_packet_config (&remote_protocol_packets
[i
]);
2842 /* Symbol look-up. */
2845 remote_check_symbols (struct objfile
*objfile
)
2847 struct remote_state
*rs
= get_remote_state ();
2848 char *msg
, *reply
, *tmp
;
2849 struct minimal_symbol
*sym
;
2852 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2855 /* Make sure the remote is pointing at the right process. */
2856 set_general_process ();
2858 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2859 because we need both at the same time. */
2860 msg
= alloca (get_remote_packet_size ());
2862 /* Invite target to request symbol lookups. */
2864 putpkt ("qSymbol::");
2865 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2866 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2869 while (strncmp (reply
, "qSymbol:", 8) == 0)
2872 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2874 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2876 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2879 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
2880 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
2882 /* If this is a function address, return the start of code
2883 instead of any data function descriptor. */
2884 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
2888 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2889 phex_nz (sym_addr
, addr_size
), &reply
[8]);
2893 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2898 static struct serial
*
2899 remote_serial_open (char *name
)
2901 static int udp_warning
= 0;
2903 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2904 of in ser-tcp.c, because it is the remote protocol assuming that the
2905 serial connection is reliable and not the serial connection promising
2907 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2910 The remote protocol may be unreliable over UDP.\n\
2911 Some events may be lost, rendering further debugging impossible."));
2915 return serial_open (name
);
2918 /* This type describes each known response to the qSupported
2920 struct protocol_feature
2922 /* The name of this protocol feature. */
2925 /* The default for this protocol feature. */
2926 enum packet_support default_support
;
2928 /* The function to call when this feature is reported, or after
2929 qSupported processing if the feature is not supported.
2930 The first argument points to this structure. The second
2931 argument indicates whether the packet requested support be
2932 enabled, disabled, or probed (or the default, if this function
2933 is being called at the end of processing and this feature was
2934 not reported). The third argument may be NULL; if not NULL, it
2935 is a NUL-terminated string taken from the packet following
2936 this feature's name and an equals sign. */
2937 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2940 /* The corresponding packet for this feature. Only used if
2941 FUNC is remote_supported_packet. */
2946 remote_supported_packet (const struct protocol_feature
*feature
,
2947 enum packet_support support
,
2948 const char *argument
)
2952 warning (_("Remote qSupported response supplied an unexpected value for"
2953 " \"%s\"."), feature
->name
);
2957 if (remote_protocol_packets
[feature
->packet
].support
2958 == PACKET_SUPPORT_UNKNOWN
)
2959 remote_protocol_packets
[feature
->packet
].support
= support
;
2963 remote_packet_size (const struct protocol_feature
*feature
,
2964 enum packet_support support
, const char *value
)
2966 struct remote_state
*rs
= get_remote_state ();
2971 if (support
!= PACKET_ENABLE
)
2974 if (value
== NULL
|| *value
== '\0')
2976 warning (_("Remote target reported \"%s\" without a size."),
2982 packet_size
= strtol (value
, &value_end
, 16);
2983 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2985 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2986 feature
->name
, value
);
2990 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2992 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2993 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2994 packet_size
= MAX_REMOTE_PACKET_SIZE
;
2997 /* Record the new maximum packet size. */
2998 rs
->explicit_packet_size
= packet_size
;
3002 remote_multi_process_feature (const struct protocol_feature
*feature
,
3003 enum packet_support support
, const char *value
)
3005 struct remote_state
*rs
= get_remote_state ();
3006 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
3010 remote_non_stop_feature (const struct protocol_feature
*feature
,
3011 enum packet_support support
, const char *value
)
3013 struct remote_state
*rs
= get_remote_state ();
3014 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
3018 remote_cond_tracepoint_feature (const struct protocol_feature
*feature
,
3019 enum packet_support support
,
3022 struct remote_state
*rs
= get_remote_state ();
3023 rs
->cond_tracepoints
= (support
== PACKET_ENABLE
);
3026 static struct protocol_feature remote_protocol_features
[] = {
3027 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
3028 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
3029 PACKET_qXfer_auxv
},
3030 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
3031 PACKET_qXfer_features
},
3032 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
3033 PACKET_qXfer_libraries
},
3034 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
3035 PACKET_qXfer_memory_map
},
3036 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
3037 PACKET_qXfer_spu_read
},
3038 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
3039 PACKET_qXfer_spu_write
},
3040 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
3041 PACKET_qXfer_osdata
},
3042 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
3043 PACKET_QPassSignals
},
3044 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
3045 PACKET_QStartNoAckMode
},
3046 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
3047 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
3048 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
3049 PACKET_qXfer_siginfo_read
},
3050 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
3051 PACKET_qXfer_siginfo_write
},
3052 { "ConditionalTracepoints", PACKET_DISABLE
, remote_cond_tracepoint_feature
,
3053 PACKET_ConditionalTracepoints
},
3057 remote_query_supported (void)
3059 struct remote_state
*rs
= get_remote_state ();
3062 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3064 /* The packet support flags are handled differently for this packet
3065 than for most others. We treat an error, a disabled packet, and
3066 an empty response identically: any features which must be reported
3067 to be used will be automatically disabled. An empty buffer
3068 accomplishes this, since that is also the representation for a list
3069 containing no features. */
3072 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3075 putpkt ("qSupported:multiprocess+");
3077 putpkt ("qSupported");
3079 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3081 /* If an error occured, warn, but do not return - just reset the
3082 buffer to empty and go on to disable features. */
3083 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3086 warning (_("Remote failure reply: %s"), rs
->buf
);
3091 memset (seen
, 0, sizeof (seen
));
3096 enum packet_support is_supported
;
3097 char *p
, *end
, *name_end
, *value
;
3099 /* First separate out this item from the rest of the packet. If
3100 there's another item after this, we overwrite the separator
3101 (terminated strings are much easier to work with). */
3103 end
= strchr (p
, ';');
3106 end
= p
+ strlen (p
);
3116 warning (_("empty item in \"qSupported\" response"));
3121 name_end
= strchr (p
, '=');
3124 /* This is a name=value entry. */
3125 is_supported
= PACKET_ENABLE
;
3126 value
= name_end
+ 1;
3135 is_supported
= PACKET_ENABLE
;
3139 is_supported
= PACKET_DISABLE
;
3143 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3147 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
3153 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3154 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3156 const struct protocol_feature
*feature
;
3159 feature
= &remote_protocol_features
[i
];
3160 feature
->func (feature
, is_supported
, value
);
3165 /* If we increased the packet size, make sure to increase the global
3166 buffer size also. We delay this until after parsing the entire
3167 qSupported packet, because this is the same buffer we were
3169 if (rs
->buf_size
< rs
->explicit_packet_size
)
3171 rs
->buf_size
= rs
->explicit_packet_size
;
3172 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3175 /* Handle the defaults for unmentioned features. */
3176 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3179 const struct protocol_feature
*feature
;
3181 feature
= &remote_protocol_features
[i
];
3182 feature
->func (feature
, feature
->default_support
, NULL
);
3188 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
, int extended_p
)
3190 struct remote_state
*rs
= get_remote_state ();
3193 error (_("To open a remote debug connection, you need to specify what\n"
3194 "serial device is attached to the remote system\n"
3195 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3197 /* See FIXME above. */
3198 if (!target_async_permitted
)
3199 wait_forever_enabled_p
= 1;
3201 /* If we're connected to a running target, target_preopen will kill it.
3202 But if we're connected to a target system with no running process,
3203 then we will still be connected when it returns. Ask this question
3204 first, before target_preopen has a chance to kill anything. */
3205 if (remote_desc
!= NULL
&& !have_inferiors ())
3208 || query (_("Already connected to a remote target. Disconnect? ")))
3211 error (_("Still connected."));
3214 target_preopen (from_tty
);
3216 unpush_target (target
);
3218 /* This time without a query. If we were connected to an
3219 extended-remote target and target_preopen killed the running
3220 process, we may still be connected. If we are starting "target
3221 remote" now, the extended-remote target will not have been
3222 removed by unpush_target. */
3223 if (remote_desc
!= NULL
&& !have_inferiors ())
3226 /* Make sure we send the passed signals list the next time we resume. */
3227 xfree (last_pass_packet
);
3228 last_pass_packet
= NULL
;
3230 remote_fileio_reset ();
3231 reopen_exec_file ();
3234 remote_desc
= remote_serial_open (name
);
3236 perror_with_name (name
);
3238 if (baud_rate
!= -1)
3240 if (serial_setbaudrate (remote_desc
, baud_rate
))
3242 /* The requested speed could not be set. Error out to
3243 top level after closing remote_desc. Take care to
3244 set remote_desc to NULL to avoid closing remote_desc
3246 serial_close (remote_desc
);
3248 perror_with_name (name
);
3252 serial_raw (remote_desc
);
3254 /* If there is something sitting in the buffer we might take it as a
3255 response to a command, which would be bad. */
3256 serial_flush_input (remote_desc
);
3260 puts_filtered ("Remote debugging using ");
3261 puts_filtered (name
);
3262 puts_filtered ("\n");
3264 push_target (target
); /* Switch to using remote target now. */
3266 /* Register extra event sources in the event loop. */
3267 remote_async_inferior_event_token
3268 = create_async_event_handler (remote_async_inferior_event_handler
,
3270 remote_async_get_pending_events_token
3271 = create_async_event_handler (remote_async_get_pending_events_handler
,
3274 /* Reset the target state; these things will be queried either by
3275 remote_query_supported or as they are needed. */
3276 init_all_packet_configs ();
3277 rs
->cached_wait_status
= 0;
3278 rs
->explicit_packet_size
= 0;
3280 rs
->multi_process_aware
= 0;
3281 rs
->extended
= extended_p
;
3282 rs
->non_stop_aware
= 0;
3283 rs
->waiting_for_stop_reply
= 0;
3285 general_thread
= not_sent_ptid
;
3286 continue_thread
= not_sent_ptid
;
3288 /* Probe for ability to use "ThreadInfo" query, as required. */
3289 use_threadinfo_query
= 1;
3290 use_threadextra_query
= 1;
3292 if (target_async_permitted
)
3294 /* With this target we start out by owning the terminal. */
3295 remote_async_terminal_ours_p
= 1;
3297 /* FIXME: cagney/1999-09-23: During the initial connection it is
3298 assumed that the target is already ready and able to respond to
3299 requests. Unfortunately remote_start_remote() eventually calls
3300 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3301 around this. Eventually a mechanism that allows
3302 wait_for_inferior() to expect/get timeouts will be
3304 wait_forever_enabled_p
= 0;
3307 /* First delete any symbols previously loaded from shared libraries. */
3308 no_shared_libraries (NULL
, 0);
3311 init_thread_list ();
3313 /* Start the remote connection. If error() or QUIT, discard this
3314 target (we'd otherwise be in an inconsistent state) and then
3315 propogate the error on up the exception chain. This ensures that
3316 the caller doesn't stumble along blindly assuming that the
3317 function succeeded. The CLI doesn't have this problem but other
3318 UI's, such as MI do.
3320 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3321 this function should return an error indication letting the
3322 caller restore the previous state. Unfortunately the command
3323 ``target remote'' is directly wired to this function making that
3324 impossible. On a positive note, the CLI side of this problem has
3325 been fixed - the function set_cmd_context() makes it possible for
3326 all the ``target ....'' commands to share a common callback
3327 function. See cli-dump.c. */
3329 struct gdb_exception ex
;
3330 struct start_remote_args args
;
3332 args
.from_tty
= from_tty
;
3333 args
.target
= target
;
3334 args
.extended_p
= extended_p
;
3336 ex
= catch_exception (uiout
, remote_start_remote
, &args
, RETURN_MASK_ALL
);
3339 /* Pop the partially set up target - unless something else did
3340 already before throwing the exception. */
3341 if (remote_desc
!= NULL
)
3343 if (target_async_permitted
)
3344 wait_forever_enabled_p
= 1;
3345 throw_exception (ex
);
3349 if (target_async_permitted
)
3350 wait_forever_enabled_p
= 1;
3353 /* This takes a program previously attached to and detaches it. After
3354 this is done, GDB can be used to debug some other program. We
3355 better not have left any breakpoints in the target program or it'll
3356 die when it hits one. */
3359 remote_detach_1 (char *args
, int from_tty
, int extended
)
3361 int pid
= ptid_get_pid (inferior_ptid
);
3362 struct remote_state
*rs
= get_remote_state ();
3365 error (_("Argument given to \"detach\" when remotely debugging."));
3367 if (!target_has_execution
)
3368 error (_("No process to detach from."));
3370 /* Tell the remote target to detach. */
3371 if (remote_multi_process_p (rs
))
3372 sprintf (rs
->buf
, "D;%x", pid
);
3374 strcpy (rs
->buf
, "D");
3377 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3379 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
3381 else if (rs
->buf
[0] == '\0')
3382 error (_("Remote doesn't know how to detach"));
3384 error (_("Can't detach process."));
3388 if (remote_multi_process_p (rs
))
3389 printf_filtered (_("Detached from remote %s.\n"),
3390 target_pid_to_str (pid_to_ptid (pid
)));
3394 puts_filtered (_("Detached from remote process.\n"));
3396 puts_filtered (_("Ending remote debugging.\n"));
3400 discard_pending_stop_replies (pid
);
3401 target_mourn_inferior ();
3405 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3407 remote_detach_1 (args
, from_tty
, 0);
3411 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3413 remote_detach_1 (args
, from_tty
, 1);
3416 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3419 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
3422 error (_("Argument given to \"disconnect\" when remotely debugging."));
3424 /* Make sure we unpush even the extended remote targets; mourn
3425 won't do it. So call remote_mourn_1 directly instead of
3426 target_mourn_inferior. */
3427 remote_mourn_1 (target
);
3430 puts_filtered ("Ending remote debugging.\n");
3433 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3434 be chatty about it. */
3437 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
3439 struct remote_state
*rs
= get_remote_state ();
3442 char *wait_status
= NULL
;
3445 error_no_arg (_("process-id to attach"));
3448 pid
= strtol (args
, &dummy
, 0);
3449 /* Some targets don't set errno on errors, grrr! */
3450 if (pid
== 0 && args
== dummy
)
3451 error (_("Illegal process-id: %s."), args
);
3453 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3454 error (_("This target does not support attaching to a process"));
3456 sprintf (rs
->buf
, "vAttach;%x", pid
);
3458 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3460 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
3463 printf_unfiltered (_("Attached to %s\n"),
3464 target_pid_to_str (pid_to_ptid (pid
)));
3468 /* Save the reply for later. */
3469 wait_status
= alloca (strlen (rs
->buf
) + 1);
3470 strcpy (wait_status
, rs
->buf
);
3472 else if (strcmp (rs
->buf
, "OK") != 0)
3473 error (_("Attaching to %s failed with: %s"),
3474 target_pid_to_str (pid_to_ptid (pid
)),
3477 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3478 error (_("This target does not support attaching to a process"));
3480 error (_("Attaching to %s failed"),
3481 target_pid_to_str (pid_to_ptid (pid
)));
3483 remote_add_inferior (pid
, 1);
3485 inferior_ptid
= pid_to_ptid (pid
);
3489 struct thread_info
*thread
;
3491 /* Get list of threads. */
3492 remote_threads_info (target
);
3494 thread
= first_thread_of_process (pid
);
3496 inferior_ptid
= thread
->ptid
;
3498 inferior_ptid
= pid_to_ptid (pid
);
3500 /* Invalidate our notion of the remote current thread. */
3501 record_currthread (minus_one_ptid
);
3505 /* Now, if we have thread information, update inferior_ptid. */
3506 inferior_ptid
= remote_current_thread (inferior_ptid
);
3508 /* Add the main thread to the thread list. */
3509 add_thread_silent (inferior_ptid
);
3512 /* Next, if the target can specify a description, read it. We do
3513 this before anything involving memory or registers. */
3514 target_find_description ();
3518 /* Use the previously fetched status. */
3519 gdb_assert (wait_status
!= NULL
);
3521 if (target_can_async_p ())
3523 struct stop_reply
*stop_reply
;
3524 struct cleanup
*old_chain
;
3526 stop_reply
= stop_reply_xmalloc ();
3527 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3528 remote_parse_stop_reply (wait_status
, stop_reply
);
3529 discard_cleanups (old_chain
);
3530 push_stop_reply (stop_reply
);
3532 target_async (inferior_event_handler
, 0);
3536 gdb_assert (wait_status
!= NULL
);
3537 strcpy (rs
->buf
, wait_status
);
3538 rs
->cached_wait_status
= 1;
3542 gdb_assert (wait_status
== NULL
);
3546 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3548 extended_remote_attach_1 (ops
, args
, from_tty
);
3551 /* Convert hex digit A to a number. */
3556 if (a
>= '0' && a
<= '9')
3558 else if (a
>= 'a' && a
<= 'f')
3559 return a
- 'a' + 10;
3560 else if (a
>= 'A' && a
<= 'F')
3561 return a
- 'A' + 10;
3563 error (_("Reply contains invalid hex digit %d"), a
);
3567 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
3571 for (i
= 0; i
< count
; i
++)
3573 if (hex
[0] == 0 || hex
[1] == 0)
3575 /* Hex string is short, or of uneven length.
3576 Return the count that has been converted so far. */
3579 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
3585 /* Convert number NIB to a hex digit. */
3593 return 'a' + nib
- 10;
3597 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
3600 /* May use a length, or a nul-terminated string as input. */
3602 count
= strlen ((char *) bin
);
3604 for (i
= 0; i
< count
; i
++)
3606 *hex
++ = tohex ((*bin
>> 4) & 0xf);
3607 *hex
++ = tohex (*bin
++ & 0xf);
3613 /* Check for the availability of vCont. This function should also check
3617 remote_vcont_probe (struct remote_state
*rs
)
3621 strcpy (rs
->buf
, "vCont?");
3623 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3626 /* Make sure that the features we assume are supported. */
3627 if (strncmp (buf
, "vCont", 5) == 0)
3630 int support_s
, support_S
, support_c
, support_C
;
3636 rs
->support_vCont_t
= 0;
3637 while (p
&& *p
== ';')
3640 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3642 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3644 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3646 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3648 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3649 rs
->support_vCont_t
= 1;
3651 p
= strchr (p
, ';');
3654 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3655 BUF will make packet_ok disable the packet. */
3656 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
3660 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
3663 /* Helper function for building "vCont" resumptions. Write a
3664 resumption to P. ENDP points to one-passed-the-end of the buffer
3665 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
3666 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
3667 resumed thread should be single-stepped and/or signalled. If PTID
3668 equals minus_one_ptid, then all threads are resumed; if PTID
3669 represents a process, then all threads of the process are resumed;
3670 the thread to be stepped and/or signalled is given in the global
3674 append_resumption (char *p
, char *endp
,
3675 ptid_t ptid
, int step
, enum target_signal siggnal
)
3677 struct remote_state
*rs
= get_remote_state ();
3679 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3680 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
3682 p
+= xsnprintf (p
, endp
- p
, ";s");
3683 else if (siggnal
!= TARGET_SIGNAL_0
)
3684 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
3686 p
+= xsnprintf (p
, endp
- p
, ";c");
3688 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
3692 /* All (-1) threads of process. */
3693 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3695 p
+= xsnprintf (p
, endp
- p
, ":");
3696 p
= write_ptid (p
, endp
, nptid
);
3698 else if (!ptid_equal (ptid
, minus_one_ptid
))
3700 p
+= xsnprintf (p
, endp
- p
, ":");
3701 p
= write_ptid (p
, endp
, ptid
);
3707 /* Resume the remote inferior by using a "vCont" packet. The thread
3708 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3709 resumed thread should be single-stepped and/or signalled. If PTID
3710 equals minus_one_ptid, then all threads are resumed; the thread to
3711 be stepped and/or signalled is given in the global INFERIOR_PTID.
3712 This function returns non-zero iff it resumes the inferior.
3714 This function issues a strict subset of all possible vCont commands at the
3718 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
3720 struct remote_state
*rs
= get_remote_state ();
3724 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3725 remote_vcont_probe (rs
);
3727 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
3731 endp
= rs
->buf
+ get_remote_packet_size ();
3733 /* If we could generate a wider range of packets, we'd have to worry
3734 about overflowing BUF. Should there be a generic
3735 "multi-part-packet" packet? */
3737 p
+= xsnprintf (p
, endp
- p
, "vCont");
3739 if (ptid_equal (ptid
, magic_null_ptid
))
3741 /* MAGIC_NULL_PTID means that we don't have any active threads,
3742 so we don't have any TID numbers the inferior will
3743 understand. Make sure to only send forms that do not specify
3745 p
= append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
3747 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
3749 /* Resume all threads (of all processes, or of a single
3750 process), with preference for INFERIOR_PTID. This assumes
3751 inferior_ptid belongs to the set of all threads we are about
3753 if (step
|| siggnal
!= TARGET_SIGNAL_0
)
3755 /* Step inferior_ptid, with or without signal. */
3756 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
3759 /* And continue others without a signal. */
3760 p
= append_resumption (p
, endp
, ptid
, /*step=*/ 0, TARGET_SIGNAL_0
);
3764 /* Scheduler locking; resume only PTID. */
3765 p
= append_resumption (p
, endp
, ptid
, step
, siggnal
);
3768 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
3773 /* In non-stop, the stub replies to vCont with "OK". The stop
3774 reply will be reported asynchronously by means of a `%Stop'
3776 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3777 if (strcmp (rs
->buf
, "OK") != 0)
3778 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
3784 /* Tell the remote machine to resume. */
3786 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
3788 static int last_sent_step
;
3791 remote_resume (struct target_ops
*ops
,
3792 ptid_t ptid
, int step
, enum target_signal siggnal
)
3794 struct remote_state
*rs
= get_remote_state ();
3797 last_sent_signal
= siggnal
;
3798 last_sent_step
= step
;
3800 /* Update the inferior on signals to silently pass, if they've changed. */
3801 remote_pass_signals ();
3803 /* The vCont packet doesn't need to specify threads via Hc. */
3804 if (remote_vcont_resume (ptid
, step
, siggnal
))
3807 /* All other supported resume packets do use Hc, so set the continue
3809 if (ptid_equal (ptid
, minus_one_ptid
))
3810 set_continue_thread (any_thread_ptid
);
3812 set_continue_thread (ptid
);
3815 if (execution_direction
== EXEC_REVERSE
)
3817 /* We don't pass signals to the target in reverse exec mode. */
3818 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
3819 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
3821 strcpy (buf
, step
? "bs" : "bc");
3823 else if (siggnal
!= TARGET_SIGNAL_0
)
3825 buf
[0] = step
? 'S' : 'C';
3826 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
3827 buf
[2] = tohex (((int) siggnal
) & 0xf);
3831 strcpy (buf
, step
? "s" : "c");
3836 /* We are about to start executing the inferior, let's register it
3837 with the event loop. NOTE: this is the one place where all the
3838 execution commands end up. We could alternatively do this in each
3839 of the execution commands in infcmd.c. */
3840 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3841 into infcmd.c in order to allow inferior function calls to work
3842 NOT asynchronously. */
3843 if (target_can_async_p ())
3844 target_async (inferior_event_handler
, 0);
3846 /* We've just told the target to resume. The remote server will
3847 wait for the inferior to stop, and then send a stop reply. In
3848 the mean time, we can't start another command/query ourselves
3849 because the stub wouldn't be ready to process it. This applies
3850 only to the base all-stop protocol, however. In non-stop (which
3851 only supports vCont), the stub replies with an "OK", and is
3852 immediate able to process further serial input. */
3854 rs
->waiting_for_stop_reply
= 1;
3858 /* Set up the signal handler for SIGINT, while the target is
3859 executing, ovewriting the 'regular' SIGINT signal handler. */
3861 initialize_sigint_signal_handler (void)
3863 signal (SIGINT
, handle_remote_sigint
);
3866 /* Signal handler for SIGINT, while the target is executing. */
3868 handle_remote_sigint (int sig
)
3870 signal (sig
, handle_remote_sigint_twice
);
3871 mark_async_signal_handler_wrapper (sigint_remote_token
);
3874 /* Signal handler for SIGINT, installed after SIGINT has already been
3875 sent once. It will take effect the second time that the user sends
3878 handle_remote_sigint_twice (int sig
)
3880 signal (sig
, handle_remote_sigint
);
3881 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
3884 /* Perform the real interruption of the target execution, in response
3887 async_remote_interrupt (gdb_client_data arg
)
3890 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
3892 target_stop (inferior_ptid
);
3895 /* Perform interrupt, if the first attempt did not succeed. Just give
3896 up on the target alltogether. */
3898 async_remote_interrupt_twice (gdb_client_data arg
)
3901 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
3906 /* Reinstall the usual SIGINT handlers, after the target has
3909 cleanup_sigint_signal_handler (void *dummy
)
3911 signal (SIGINT
, handle_sigint
);
3914 /* Send ^C to target to halt it. Target will respond, and send us a
3916 static void (*ofunc
) (int);
3918 /* The command line interface's stop routine. This function is installed
3919 as a signal handler for SIGINT. The first time a user requests a
3920 stop, we call remote_stop to send a break or ^C. If there is no
3921 response from the target (it didn't stop when the user requested it),
3922 we ask the user if he'd like to detach from the target. */
3924 remote_interrupt (int signo
)
3926 /* If this doesn't work, try more severe steps. */
3927 signal (signo
, remote_interrupt_twice
);
3929 gdb_call_async_signal_handler (sigint_remote_token
, 1);
3932 /* The user typed ^C twice. */
3935 remote_interrupt_twice (int signo
)
3937 signal (signo
, ofunc
);
3938 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
3939 signal (signo
, remote_interrupt
);
3942 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
3943 thread, all threads of a remote process, or all threads of all
3947 remote_stop_ns (ptid_t ptid
)
3949 struct remote_state
*rs
= get_remote_state ();
3951 char *endp
= rs
->buf
+ get_remote_packet_size ();
3953 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3954 remote_vcont_probe (rs
);
3956 if (!rs
->support_vCont_t
)
3957 error (_("Remote server does not support stopping threads"));
3959 if (ptid_equal (ptid
, minus_one_ptid
)
3960 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
3961 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
3966 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
3968 if (ptid_is_pid (ptid
))
3969 /* All (-1) threads of process. */
3970 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3973 /* Small optimization: if we already have a stop reply for
3974 this thread, no use in telling the stub we want this
3976 if (peek_stop_reply (ptid
))
3982 p
= write_ptid (p
, endp
, nptid
);
3985 /* In non-stop, we get an immediate OK reply. The stop reply will
3986 come in asynchronously by notification. */
3988 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3989 if (strcmp (rs
->buf
, "OK") != 0)
3990 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
3993 /* All-stop version of target_stop. Sends a break or a ^C to stop the
3994 remote target. It is undefined which thread of which process
3995 reports the stop. */
3998 remote_stop_as (ptid_t ptid
)
4000 struct remote_state
*rs
= get_remote_state ();
4002 /* If the inferior is stopped already, but the core didn't know
4003 about it yet, just ignore the request. The cached wait status
4004 will be collected in remote_wait. */
4005 if (rs
->cached_wait_status
)
4008 /* Send a break or a ^C, depending on user preference. */
4011 serial_send_break (remote_desc
);
4013 serial_write (remote_desc
, "\003", 1);
4016 /* This is the generic stop called via the target vector. When a target
4017 interrupt is requested, either by the command line or the GUI, we
4018 will eventually end up here. */
4021 remote_stop (ptid_t ptid
)
4024 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
4027 remote_stop_ns (ptid
);
4029 remote_stop_as (ptid
);
4032 /* Ask the user what to do when an interrupt is received. */
4035 interrupt_query (void)
4037 target_terminal_ours ();
4039 if (target_can_async_p ())
4041 signal (SIGINT
, handle_sigint
);
4042 deprecated_throw_reason (RETURN_QUIT
);
4046 if (query (_("Interrupted while waiting for the program.\n\
4047 Give up (and stop debugging it)? ")))
4050 deprecated_throw_reason (RETURN_QUIT
);
4054 target_terminal_inferior ();
4057 /* Enable/disable target terminal ownership. Most targets can use
4058 terminal groups to control terminal ownership. Remote targets are
4059 different in that explicit transfer of ownership to/from GDB/target
4063 remote_terminal_inferior (void)
4065 if (!target_async_permitted
)
4066 /* Nothing to do. */
4069 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4070 idempotent. The event-loop GDB talking to an asynchronous target
4071 with a synchronous command calls this function from both
4072 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4073 transfer the terminal to the target when it shouldn't this guard
4075 if (!remote_async_terminal_ours_p
)
4077 delete_file_handler (input_fd
);
4078 remote_async_terminal_ours_p
= 0;
4079 initialize_sigint_signal_handler ();
4080 /* NOTE: At this point we could also register our selves as the
4081 recipient of all input. Any characters typed could then be
4082 passed on down to the target. */
4086 remote_terminal_ours (void)
4088 if (!target_async_permitted
)
4089 /* Nothing to do. */
4092 /* See FIXME in remote_terminal_inferior. */
4093 if (remote_async_terminal_ours_p
)
4095 cleanup_sigint_signal_handler (NULL
);
4096 add_file_handler (input_fd
, stdin_event_handler
, 0);
4097 remote_async_terminal_ours_p
= 1;
4101 remote_console_output (char *msg
)
4105 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4108 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4111 fputs_unfiltered (tb
, gdb_stdtarg
);
4113 gdb_flush (gdb_stdtarg
);
4116 typedef struct cached_reg
4119 gdb_byte data
[MAX_REGISTER_SIZE
];
4122 DEF_VEC_O(cached_reg_t
);
4126 struct stop_reply
*next
;
4130 struct target_waitstatus ws
;
4132 VEC(cached_reg_t
) *regcache
;
4134 int stopped_by_watchpoint_p
;
4135 CORE_ADDR watch_data_address
;
4141 /* The list of already fetched and acknowledged stop events. */
4142 static struct stop_reply
*stop_reply_queue
;
4144 static struct stop_reply
*
4145 stop_reply_xmalloc (void)
4147 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4153 stop_reply_xfree (struct stop_reply
*r
)
4157 VEC_free (cached_reg_t
, r
->regcache
);
4162 /* Discard all pending stop replies of inferior PID. If PID is -1,
4163 discard everything. */
4166 discard_pending_stop_replies (int pid
)
4168 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4170 /* Discard the in-flight notification. */
4171 if (pending_stop_reply
!= NULL
4173 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4175 stop_reply_xfree (pending_stop_reply
);
4176 pending_stop_reply
= NULL
;
4179 /* Discard the stop replies we have already pulled with
4181 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4185 || ptid_get_pid (reply
->ptid
) == pid
)
4187 if (reply
== stop_reply_queue
)
4188 stop_reply_queue
= reply
->next
;
4190 prev
->next
= reply
->next
;
4192 stop_reply_xfree (reply
);
4199 /* Cleanup wrapper. */
4202 do_stop_reply_xfree (void *arg
)
4204 struct stop_reply
*r
= arg
;
4205 stop_reply_xfree (r
);
4208 /* Look for a queued stop reply belonging to PTID. If one is found,
4209 remove it from the queue, and return it. Returns NULL if none is
4210 found. If there are still queued events left to process, tell the
4211 event loop to get back to target_wait soon. */
4213 static struct stop_reply
*
4214 queued_stop_reply (ptid_t ptid
)
4216 struct stop_reply
*it
, *prev
;
4217 struct stop_reply head
;
4219 head
.next
= stop_reply_queue
;
4224 if (!ptid_equal (ptid
, minus_one_ptid
))
4225 for (; it
; prev
= it
, it
= it
->next
)
4226 if (ptid_equal (ptid
, it
->ptid
))
4231 prev
->next
= it
->next
;
4235 stop_reply_queue
= head
.next
;
4237 if (stop_reply_queue
)
4238 /* There's still at least an event left. */
4239 mark_async_event_handler (remote_async_inferior_event_token
);
4244 /* Push a fully parsed stop reply in the stop reply queue. Since we
4245 know that we now have at least one queued event left to pass to the
4246 core side, tell the event loop to get back to target_wait soon. */
4249 push_stop_reply (struct stop_reply
*new_event
)
4251 struct stop_reply
*event
;
4253 if (stop_reply_queue
)
4255 for (event
= stop_reply_queue
;
4256 event
&& event
->next
;
4257 event
= event
->next
)
4260 event
->next
= new_event
;
4263 stop_reply_queue
= new_event
;
4265 mark_async_event_handler (remote_async_inferior_event_token
);
4268 /* Returns true if we have a stop reply for PTID. */
4271 peek_stop_reply (ptid_t ptid
)
4273 struct stop_reply
*it
;
4275 for (it
= stop_reply_queue
; it
; it
= it
->next
)
4276 if (ptid_equal (ptid
, it
->ptid
))
4278 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
4285 /* Parse the stop reply in BUF. Either the function succeeds, and the
4286 result is stored in EVENT, or throws an error. */
4289 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
4291 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4295 event
->ptid
= null_ptid
;
4296 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
4297 event
->ws
.value
.integer
= 0;
4298 event
->solibs_changed
= 0;
4299 event
->replay_event
= 0;
4300 event
->stopped_by_watchpoint_p
= 0;
4301 event
->regcache
= NULL
;
4305 case 'T': /* Status with PC, SP, FP, ... */
4306 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4307 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4309 n... = register number
4310 r... = register contents
4313 p
= &buf
[3]; /* after Txx */
4321 /* If the packet contains a register number, save it in
4322 pnum and set p1 to point to the character following it.
4323 Otherwise p1 points to p. */
4325 /* If this packet is an awatch packet, don't parse the 'a'
4326 as a register number. */
4328 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
4330 /* Read the ``P'' register number. */
4331 pnum
= strtol (p
, &p_temp
, 16);
4337 if (p1
== p
) /* No register number present here. */
4339 p1
= strchr (p
, ':');
4341 error (_("Malformed packet(a) (missing colon): %s\n\
4344 if (strncmp (p
, "thread", p1
- p
) == 0)
4345 event
->ptid
= read_ptid (++p1
, &p
);
4346 else if ((strncmp (p
, "watch", p1
- p
) == 0)
4347 || (strncmp (p
, "rwatch", p1
- p
) == 0)
4348 || (strncmp (p
, "awatch", p1
- p
) == 0))
4350 event
->stopped_by_watchpoint_p
= 1;
4351 p
= unpack_varlen_hex (++p1
, &addr
);
4352 event
->watch_data_address
= (CORE_ADDR
) addr
;
4354 else if (strncmp (p
, "library", p1
- p
) == 0)
4358 while (*p_temp
&& *p_temp
!= ';')
4361 event
->solibs_changed
= 1;
4364 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
4366 /* NO_HISTORY event.
4367 p1 will indicate "begin" or "end", but
4368 it makes no difference for now, so ignore it. */
4369 event
->replay_event
= 1;
4370 p_temp
= strchr (p1
+ 1, ';');
4376 /* Silently skip unknown optional info. */
4377 p_temp
= strchr (p1
+ 1, ';');
4384 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
4385 cached_reg_t cached_reg
;
4390 error (_("Malformed packet(b) (missing colon): %s\n\
4396 error (_("Remote sent bad register number %s: %s\n\
4398 phex_nz (pnum
, 0), p
, buf
);
4400 cached_reg
.num
= reg
->regnum
;
4402 fieldsize
= hex2bin (p
, cached_reg
.data
,
4403 register_size (target_gdbarch
,
4406 if (fieldsize
< register_size (target_gdbarch
,
4408 warning (_("Remote reply is too short: %s"), buf
);
4410 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
4414 error (_("Remote register badly formatted: %s\nhere: %s"),
4419 case 'S': /* Old style status, just signal only. */
4420 if (event
->solibs_changed
)
4421 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
4422 else if (event
->replay_event
)
4423 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
4426 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
4427 event
->ws
.value
.sig
= (enum target_signal
)
4428 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
4431 case 'W': /* Target exited. */
4438 /* GDB used to accept only 2 hex chars here. Stubs should
4439 only send more if they detect GDB supports multi-process
4441 p
= unpack_varlen_hex (&buf
[1], &value
);
4445 /* The remote process exited. */
4446 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
4447 event
->ws
.value
.integer
= value
;
4451 /* The remote process exited with a signal. */
4452 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
4453 event
->ws
.value
.sig
= (enum target_signal
) value
;
4456 /* If no process is specified, assume inferior_ptid. */
4457 pid
= ptid_get_pid (inferior_ptid
);
4466 else if (strncmp (p
,
4467 "process:", sizeof ("process:") - 1) == 0)
4470 p
+= sizeof ("process:") - 1;
4471 unpack_varlen_hex (p
, &upid
);
4475 error (_("unknown stop reply packet: %s"), buf
);
4478 error (_("unknown stop reply packet: %s"), buf
);
4479 event
->ptid
= pid_to_ptid (pid
);
4484 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
4485 error (_("No process or thread specified in stop reply: %s"), buf
);
4488 /* When the stub wants to tell GDB about a new stop reply, it sends a
4489 stop notification (%Stop). Those can come it at any time, hence,
4490 we have to make sure that any pending putpkt/getpkt sequence we're
4491 making is finished, before querying the stub for more events with
4492 vStopped. E.g., if we started a vStopped sequence immediatelly
4493 upon receiving the %Stop notification, something like this could
4501 1.6) <-- (registers reply to step #1.3)
4503 Obviously, the reply in step #1.6 would be unexpected to a vStopped
4506 To solve this, whenever we parse a %Stop notification sucessfully,
4507 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
4508 doing whatever we were doing:
4514 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
4515 2.5) <-- (registers reply to step #2.3)
4517 Eventualy after step #2.5, we return to the event loop, which
4518 notices there's an event on the
4519 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
4520 associated callback --- the function below. At this point, we're
4521 always safe to start a vStopped sequence. :
4524 2.7) <-- T05 thread:2
4530 remote_get_pending_stop_replies (void)
4532 struct remote_state
*rs
= get_remote_state ();
4534 if (pending_stop_reply
)
4537 putpkt ("vStopped");
4539 /* Now we can rely on it. */
4540 push_stop_reply (pending_stop_reply
);
4541 pending_stop_reply
= NULL
;
4545 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4546 if (strcmp (rs
->buf
, "OK") == 0)
4550 struct cleanup
*old_chain
;
4551 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
4553 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4554 remote_parse_stop_reply (rs
->buf
, stop_reply
);
4557 putpkt ("vStopped");
4559 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
4561 /* Now we can rely on it. */
4562 discard_cleanups (old_chain
);
4563 push_stop_reply (stop_reply
);
4566 /* We got an unknown stop reply. */
4567 do_cleanups (old_chain
);
4574 /* Called when it is decided that STOP_REPLY holds the info of the
4575 event that is to be returned to the core. This function always
4576 destroys STOP_REPLY. */
4579 process_stop_reply (struct stop_reply
*stop_reply
,
4580 struct target_waitstatus
*status
)
4584 *status
= stop_reply
->ws
;
4585 ptid
= stop_reply
->ptid
;
4587 /* If no thread/process was reported by the stub, assume the current
4589 if (ptid_equal (ptid
, null_ptid
))
4590 ptid
= inferior_ptid
;
4592 if (status
->kind
!= TARGET_WAITKIND_EXITED
4593 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4595 /* Expedited registers. */
4596 if (stop_reply
->regcache
)
4598 struct regcache
*regcache
4599 = get_thread_arch_regcache (ptid
, target_gdbarch
);
4604 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
4606 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
4607 VEC_free (cached_reg_t
, stop_reply
->regcache
);
4610 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
4611 remote_watch_data_address
= stop_reply
->watch_data_address
;
4613 remote_notice_new_inferior (ptid
, 0);
4616 stop_reply_xfree (stop_reply
);
4620 /* The non-stop mode version of target_wait. */
4623 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4625 struct remote_state
*rs
= get_remote_state ();
4626 struct stop_reply
*stop_reply
;
4629 /* If in non-stop mode, get out of getpkt even if a
4630 notification is received. */
4632 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4639 case 'E': /* Error of some sort. */
4640 /* We're out of sync with the target now. Did it continue
4641 or not? We can't tell which thread it was in non-stop,
4642 so just ignore this. */
4643 warning (_("Remote failure reply: %s"), rs
->buf
);
4645 case 'O': /* Console output. */
4646 remote_console_output (rs
->buf
+ 1);
4649 warning (_("Invalid remote reply: %s"), rs
->buf
);
4653 /* Acknowledge a pending stop reply that may have arrived in the
4655 if (pending_stop_reply
!= NULL
)
4656 remote_get_pending_stop_replies ();
4658 /* If indeed we noticed a stop reply, we're done. */
4659 stop_reply
= queued_stop_reply (ptid
);
4660 if (stop_reply
!= NULL
)
4661 return process_stop_reply (stop_reply
, status
);
4663 /* Still no event. If we're just polling for an event, then
4664 return to the event loop. */
4665 if (options
& TARGET_WNOHANG
)
4667 status
->kind
= TARGET_WAITKIND_IGNORE
;
4668 return minus_one_ptid
;
4671 /* Otherwise do a blocking wait. */
4672 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4677 /* Wait until the remote machine stops, then return, storing status in
4678 STATUS just as `wait' would. */
4681 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4683 struct remote_state
*rs
= get_remote_state ();
4684 ptid_t event_ptid
= null_ptid
;
4686 struct stop_reply
*stop_reply
;
4690 status
->kind
= TARGET_WAITKIND_IGNORE
;
4691 status
->value
.integer
= 0;
4693 stop_reply
= queued_stop_reply (ptid
);
4694 if (stop_reply
!= NULL
)
4695 return process_stop_reply (stop_reply
, status
);
4697 if (rs
->cached_wait_status
)
4698 /* Use the cached wait status, but only once. */
4699 rs
->cached_wait_status
= 0;
4704 if (!target_is_async_p ())
4706 ofunc
= signal (SIGINT
, remote_interrupt
);
4707 /* If the user hit C-c before this packet, or between packets,
4708 pretend that it was hit right here. */
4712 remote_interrupt (SIGINT
);
4716 /* FIXME: cagney/1999-09-27: If we're in async mode we should
4717 _never_ wait for ever -> test on target_is_async_p().
4718 However, before we do that we need to ensure that the caller
4719 knows how to take the target into/out of async mode. */
4720 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
4721 if (!target_is_async_p ())
4722 signal (SIGINT
, ofunc
);
4727 remote_stopped_by_watchpoint_p
= 0;
4729 /* We got something. */
4730 rs
->waiting_for_stop_reply
= 0;
4734 case 'E': /* Error of some sort. */
4735 /* We're out of sync with the target now. Did it continue or
4736 not? Not is more likely, so report a stop. */
4737 warning (_("Remote failure reply: %s"), buf
);
4738 status
->kind
= TARGET_WAITKIND_STOPPED
;
4739 status
->value
.sig
= TARGET_SIGNAL_0
;
4741 case 'F': /* File-I/O request. */
4742 remote_fileio_request (buf
);
4744 case 'T': case 'S': case 'X': case 'W':
4746 struct stop_reply
*stop_reply
;
4747 struct cleanup
*old_chain
;
4749 stop_reply
= stop_reply_xmalloc ();
4750 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4751 remote_parse_stop_reply (buf
, stop_reply
);
4752 discard_cleanups (old_chain
);
4753 event_ptid
= process_stop_reply (stop_reply
, status
);
4756 case 'O': /* Console output. */
4757 remote_console_output (buf
+ 1);
4759 /* The target didn't really stop; keep waiting. */
4760 rs
->waiting_for_stop_reply
= 1;
4764 if (last_sent_signal
!= TARGET_SIGNAL_0
)
4766 /* Zero length reply means that we tried 'S' or 'C' and the
4767 remote system doesn't support it. */
4768 target_terminal_ours_for_output ();
4770 ("Can't send signals to this remote system. %s not sent.\n",
4771 target_signal_to_name (last_sent_signal
));
4772 last_sent_signal
= TARGET_SIGNAL_0
;
4773 target_terminal_inferior ();
4775 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
4776 putpkt ((char *) buf
);
4778 /* We just told the target to resume, so a stop reply is in
4780 rs
->waiting_for_stop_reply
= 1;
4783 /* else fallthrough */
4785 warning (_("Invalid remote reply: %s"), buf
);
4787 rs
->waiting_for_stop_reply
= 1;
4791 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
4793 /* Nothing interesting happened. If we're doing a non-blocking
4794 poll, we're done. Otherwise, go back to waiting. */
4795 if (options
& TARGET_WNOHANG
)
4796 return minus_one_ptid
;
4800 else if (status
->kind
!= TARGET_WAITKIND_EXITED
4801 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4803 if (!ptid_equal (event_ptid
, null_ptid
))
4804 record_currthread (event_ptid
);
4806 event_ptid
= inferior_ptid
;
4809 /* A process exit. Invalidate our notion of current thread. */
4810 record_currthread (minus_one_ptid
);
4815 /* Wait until the remote machine stops, then return, storing status in
4816 STATUS just as `wait' would. */
4819 remote_wait (struct target_ops
*ops
,
4820 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4825 event_ptid
= remote_wait_ns (ptid
, status
, options
);
4827 event_ptid
= remote_wait_as (ptid
, status
, options
);
4829 if (target_can_async_p ())
4831 /* If there are are events left in the queue tell the event loop
4833 if (stop_reply_queue
)
4834 mark_async_event_handler (remote_async_inferior_event_token
);
4840 /* Fetch a single register using a 'p' packet. */
4843 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
4845 struct remote_state
*rs
= get_remote_state ();
4847 char regp
[MAX_REGISTER_SIZE
];
4850 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
4853 if (reg
->pnum
== -1)
4858 p
+= hexnumstr (p
, reg
->pnum
);
4861 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4865 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
4869 case PACKET_UNKNOWN
:
4872 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
4873 gdbarch_register_name (get_regcache_arch (regcache
),
4878 /* If this register is unfetchable, tell the regcache. */
4881 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
4885 /* Otherwise, parse and supply the value. */
4891 error (_("fetch_register_using_p: early buf termination"));
4893 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4896 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
4900 /* Fetch the registers included in the target's 'g' packet. */
4903 send_g_packet (void)
4905 struct remote_state
*rs
= get_remote_state ();
4908 sprintf (rs
->buf
, "g");
4909 remote_send (&rs
->buf
, &rs
->buf_size
);
4911 /* We can get out of synch in various cases. If the first character
4912 in the buffer is not a hex character, assume that has happened
4913 and try to fetch another packet to read. */
4914 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
4915 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
4916 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
4917 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
4920 fprintf_unfiltered (gdb_stdlog
,
4921 "Bad register packet; fetching a new packet\n");
4922 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4925 buf_len
= strlen (rs
->buf
);
4927 /* Sanity check the received packet. */
4928 if (buf_len
% 2 != 0)
4929 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
4935 process_g_packet (struct regcache
*regcache
)
4937 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
4938 struct remote_state
*rs
= get_remote_state ();
4939 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4944 buf_len
= strlen (rs
->buf
);
4946 /* Further sanity checks, with knowledge of the architecture. */
4947 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
4948 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
4950 /* Save the size of the packet sent to us by the target. It is used
4951 as a heuristic when determining the max size of packets that the
4952 target can safely receive. */
4953 if (rsa
->actual_register_packet_size
== 0)
4954 rsa
->actual_register_packet_size
= buf_len
;
4956 /* If this is smaller than we guessed the 'g' packet would be,
4957 update our records. A 'g' reply that doesn't include a register's
4958 value implies either that the register is not available, or that
4959 the 'p' packet must be used. */
4960 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
4962 rsa
->sizeof_g_packet
= buf_len
/ 2;
4964 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4966 if (rsa
->regs
[i
].pnum
== -1)
4969 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
4970 rsa
->regs
[i
].in_g_packet
= 0;
4972 rsa
->regs
[i
].in_g_packet
= 1;
4976 regs
= alloca (rsa
->sizeof_g_packet
);
4978 /* Unimplemented registers read as all bits zero. */
4979 memset (regs
, 0, rsa
->sizeof_g_packet
);
4981 /* Reply describes registers byte by byte, each byte encoded as two
4982 hex characters. Suck them all up, then supply them to the
4983 register cacheing/storage mechanism. */
4986 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
4988 if (p
[0] == 0 || p
[1] == 0)
4989 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4990 internal_error (__FILE__
, __LINE__
,
4991 "unexpected end of 'g' packet reply");
4993 if (p
[0] == 'x' && p
[1] == 'x')
4994 regs
[i
] = 0; /* 'x' */
4996 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5002 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5004 struct packet_reg
*r
= &rsa
->regs
[i
];
5007 if (r
->offset
* 2 >= strlen (rs
->buf
))
5008 /* This shouldn't happen - we adjusted in_g_packet above. */
5009 internal_error (__FILE__
, __LINE__
,
5010 "unexpected end of 'g' packet reply");
5011 else if (rs
->buf
[r
->offset
* 2] == 'x')
5013 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5014 /* The register isn't available, mark it as such (at
5015 the same time setting the value to zero). */
5016 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5019 regcache_raw_supply (regcache
, r
->regnum
,
5027 fetch_registers_using_g (struct regcache
*regcache
)
5030 process_g_packet (regcache
);
5034 remote_fetch_registers (struct target_ops
*ops
,
5035 struct regcache
*regcache
, int regnum
)
5037 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5040 set_general_thread (inferior_ptid
);
5044 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5045 gdb_assert (reg
!= NULL
);
5047 /* If this register might be in the 'g' packet, try that first -
5048 we are likely to read more than one register. If this is the
5049 first 'g' packet, we might be overly optimistic about its
5050 contents, so fall back to 'p'. */
5051 if (reg
->in_g_packet
)
5053 fetch_registers_using_g (regcache
);
5054 if (reg
->in_g_packet
)
5058 if (fetch_register_using_p (regcache
, reg
))
5061 /* This register is not available. */
5062 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5067 fetch_registers_using_g (regcache
);
5069 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5070 if (!rsa
->regs
[i
].in_g_packet
)
5071 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5073 /* This register is not available. */
5074 regcache_raw_supply (regcache
, i
, NULL
);
5078 /* Prepare to store registers. Since we may send them all (using a
5079 'G' request), we have to read out the ones we don't want to change
5083 remote_prepare_to_store (struct regcache
*regcache
)
5085 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5087 gdb_byte buf
[MAX_REGISTER_SIZE
];
5089 /* Make sure the entire registers array is valid. */
5090 switch (remote_protocol_packets
[PACKET_P
].support
)
5092 case PACKET_DISABLE
:
5093 case PACKET_SUPPORT_UNKNOWN
:
5094 /* Make sure all the necessary registers are cached. */
5095 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5096 if (rsa
->regs
[i
].in_g_packet
)
5097 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5104 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5105 packet was not recognized. */
5108 store_register_using_P (const struct regcache
*regcache
,
5109 struct packet_reg
*reg
)
5111 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5112 struct remote_state
*rs
= get_remote_state ();
5113 /* Try storing a single register. */
5114 char *buf
= rs
->buf
;
5115 gdb_byte regp
[MAX_REGISTER_SIZE
];
5118 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5121 if (reg
->pnum
== -1)
5124 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5125 p
= buf
+ strlen (buf
);
5126 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5127 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5129 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5131 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5136 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5137 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
5138 case PACKET_UNKNOWN
:
5141 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5145 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5146 contents of the register cache buffer. FIXME: ignores errors. */
5149 store_registers_using_G (const struct regcache
*regcache
)
5151 struct remote_state
*rs
= get_remote_state ();
5152 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5156 /* Extract all the registers in the regcache copying them into a
5160 regs
= alloca (rsa
->sizeof_g_packet
);
5161 memset (regs
, 0, rsa
->sizeof_g_packet
);
5162 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5164 struct packet_reg
*r
= &rsa
->regs
[i
];
5166 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5170 /* Command describes registers byte by byte,
5171 each byte encoded as two hex characters. */
5174 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5176 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5178 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5179 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
5180 error (_("Could not write registers; remote failure reply '%s'"),
5184 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5185 of the register cache buffer. FIXME: ignores errors. */
5188 remote_store_registers (struct target_ops
*ops
,
5189 struct regcache
*regcache
, int regnum
)
5191 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5194 set_general_thread (inferior_ptid
);
5198 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5199 gdb_assert (reg
!= NULL
);
5201 /* Always prefer to store registers using the 'P' packet if
5202 possible; we often change only a small number of registers.
5203 Sometimes we change a larger number; we'd need help from a
5204 higher layer to know to use 'G'. */
5205 if (store_register_using_P (regcache
, reg
))
5208 /* For now, don't complain if we have no way to write the
5209 register. GDB loses track of unavailable registers too
5210 easily. Some day, this may be an error. We don't have
5211 any way to read the register, either... */
5212 if (!reg
->in_g_packet
)
5215 store_registers_using_G (regcache
);
5219 store_registers_using_G (regcache
);
5221 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5222 if (!rsa
->regs
[i
].in_g_packet
)
5223 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
5224 /* See above for why we do not issue an error here. */
5229 /* Return the number of hex digits in num. */
5232 hexnumlen (ULONGEST num
)
5236 for (i
= 0; num
!= 0; i
++)
5242 /* Set BUF to the minimum number of hex digits representing NUM. */
5245 hexnumstr (char *buf
, ULONGEST num
)
5247 int len
= hexnumlen (num
);
5248 return hexnumnstr (buf
, num
, len
);
5252 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5255 hexnumnstr (char *buf
, ULONGEST num
, int width
)
5261 for (i
= width
- 1; i
>= 0; i
--)
5263 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
5270 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5273 remote_address_masked (CORE_ADDR addr
)
5275 int address_size
= remote_address_size
;
5276 /* If "remoteaddresssize" was not set, default to target address size. */
5278 address_size
= gdbarch_addr_bit (target_gdbarch
);
5280 if (address_size
> 0
5281 && address_size
< (sizeof (ULONGEST
) * 8))
5283 /* Only create a mask when that mask can safely be constructed
5284 in a ULONGEST variable. */
5286 mask
= (mask
<< address_size
) - 1;
5292 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5293 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5294 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5295 (which may be more than *OUT_LEN due to escape characters). The
5296 total number of bytes in the output buffer will be at most
5300 remote_escape_output (const gdb_byte
*buffer
, int len
,
5301 gdb_byte
*out_buf
, int *out_len
,
5304 int input_index
, output_index
;
5307 for (input_index
= 0; input_index
< len
; input_index
++)
5309 gdb_byte b
= buffer
[input_index
];
5311 if (b
== '$' || b
== '#' || b
== '}')
5313 /* These must be escaped. */
5314 if (output_index
+ 2 > out_maxlen
)
5316 out_buf
[output_index
++] = '}';
5317 out_buf
[output_index
++] = b
^ 0x20;
5321 if (output_index
+ 1 > out_maxlen
)
5323 out_buf
[output_index
++] = b
;
5327 *out_len
= input_index
;
5328 return output_index
;
5331 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5332 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5333 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5335 This function reverses remote_escape_output. It allows more
5336 escaped characters than that function does, in particular because
5337 '*' must be escaped to avoid the run-length encoding processing
5338 in reading packets. */
5341 remote_unescape_input (const gdb_byte
*buffer
, int len
,
5342 gdb_byte
*out_buf
, int out_maxlen
)
5344 int input_index
, output_index
;
5349 for (input_index
= 0; input_index
< len
; input_index
++)
5351 gdb_byte b
= buffer
[input_index
];
5353 if (output_index
+ 1 > out_maxlen
)
5355 warning (_("Received too much data from remote target;"
5356 " ignoring overflow."));
5357 return output_index
;
5362 out_buf
[output_index
++] = b
^ 0x20;
5368 out_buf
[output_index
++] = b
;
5372 error (_("Unmatched escape character in target response."));
5374 return output_index
;
5377 /* Determine whether the remote target supports binary downloading.
5378 This is accomplished by sending a no-op memory write of zero length
5379 to the target at the specified address. It does not suffice to send
5380 the whole packet, since many stubs strip the eighth bit and
5381 subsequently compute a wrong checksum, which causes real havoc with
5384 NOTE: This can still lose if the serial line is not eight-bit
5385 clean. In cases like this, the user should clear "remote
5389 check_binary_download (CORE_ADDR addr
)
5391 struct remote_state
*rs
= get_remote_state ();
5393 switch (remote_protocol_packets
[PACKET_X
].support
)
5395 case PACKET_DISABLE
:
5399 case PACKET_SUPPORT_UNKNOWN
:
5405 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5407 p
+= hexnumstr (p
, (ULONGEST
) 0);
5411 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5412 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5414 if (rs
->buf
[0] == '\0')
5417 fprintf_unfiltered (gdb_stdlog
,
5418 "binary downloading NOT suppported by target\n");
5419 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
5424 fprintf_unfiltered (gdb_stdlog
,
5425 "binary downloading suppported by target\n");
5426 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
5433 /* Write memory data directly to the remote machine.
5434 This does not inform the data cache; the data cache uses this.
5435 HEADER is the starting part of the packet.
5436 MEMADDR is the address in the remote memory space.
5437 MYADDR is the address of the buffer in our space.
5438 LEN is the number of bytes.
5439 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
5440 should send data as binary ('X'), or hex-encoded ('M').
5442 The function creates packet of the form
5443 <HEADER><ADDRESS>,<LENGTH>:<DATA>
5445 where encoding of <DATA> is termined by PACKET_FORMAT.
5447 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
5450 Returns the number of bytes transferred, or 0 (setting errno) for
5451 error. Only transfer a single packet. */
5454 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
5455 const gdb_byte
*myaddr
, int len
,
5456 char packet_format
, int use_length
)
5458 struct remote_state
*rs
= get_remote_state ();
5468 if (packet_format
!= 'X' && packet_format
!= 'M')
5469 internal_error (__FILE__
, __LINE__
,
5470 "remote_write_bytes_aux: bad packet format");
5475 payload_size
= get_memory_write_packet_size ();
5477 /* The packet buffer will be large enough for the payload;
5478 get_memory_packet_size ensures this. */
5481 /* Compute the size of the actual payload by subtracting out the
5482 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
5484 payload_size
-= strlen ("$,:#NN");
5486 /* The comma won't be used. */
5488 header_length
= strlen (header
);
5489 payload_size
-= header_length
;
5490 payload_size
-= hexnumlen (memaddr
);
5492 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
5494 strcat (rs
->buf
, header
);
5495 p
= rs
->buf
+ strlen (header
);
5497 /* Compute a best guess of the number of bytes actually transfered. */
5498 if (packet_format
== 'X')
5500 /* Best guess at number of bytes that will fit. */
5501 todo
= min (len
, payload_size
);
5503 payload_size
-= hexnumlen (todo
);
5504 todo
= min (todo
, payload_size
);
5508 /* Num bytes that will fit. */
5509 todo
= min (len
, payload_size
/ 2);
5511 payload_size
-= hexnumlen (todo
);
5512 todo
= min (todo
, payload_size
/ 2);
5516 internal_error (__FILE__
, __LINE__
,
5517 _("minumum packet size too small to write data"));
5519 /* If we already need another packet, then try to align the end
5520 of this packet to a useful boundary. */
5521 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
5522 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
5524 /* Append "<memaddr>". */
5525 memaddr
= remote_address_masked (memaddr
);
5526 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5533 /* Append <len>. Retain the location/size of <len>. It may need to
5534 be adjusted once the packet body has been created. */
5536 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
5544 /* Append the packet body. */
5545 if (packet_format
== 'X')
5547 /* Binary mode. Send target system values byte by byte, in
5548 increasing byte addresses. Only escape certain critical
5550 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
5553 /* If not all TODO bytes fit, then we'll need another packet. Make
5554 a second try to keep the end of the packet aligned. Don't do
5555 this if the packet is tiny. */
5556 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
5560 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
5562 if (new_nr_bytes
!= nr_bytes
)
5563 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
5568 p
+= payload_length
;
5569 if (use_length
&& nr_bytes
< todo
)
5571 /* Escape chars have filled up the buffer prematurely,
5572 and we have actually sent fewer bytes than planned.
5573 Fix-up the length field of the packet. Use the same
5574 number of characters as before. */
5575 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
5576 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
5581 /* Normal mode: Send target system values byte by byte, in
5582 increasing byte addresses. Each byte is encoded as a two hex
5584 nr_bytes
= bin2hex (myaddr
, p
, todo
);
5588 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5589 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5591 if (rs
->buf
[0] == 'E')
5593 /* There is no correspondance between what the remote protocol
5594 uses for errors and errno codes. We would like a cleaner way
5595 of representing errors (big enough to include errno codes,
5596 bfd_error codes, and others). But for now just return EIO. */
5601 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
5602 fewer bytes than we'd planned. */
5606 /* Write memory data directly to the remote machine.
5607 This does not inform the data cache; the data cache uses this.
5608 MEMADDR is the address in the remote memory space.
5609 MYADDR is the address of the buffer in our space.
5610 LEN is the number of bytes.
5612 Returns number of bytes transferred, or 0 (setting errno) for
5613 error. Only transfer a single packet. */
5616 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
5618 char *packet_format
= 0;
5620 /* Check whether the target supports binary download. */
5621 check_binary_download (memaddr
);
5623 switch (remote_protocol_packets
[PACKET_X
].support
)
5626 packet_format
= "X";
5628 case PACKET_DISABLE
:
5629 packet_format
= "M";
5631 case PACKET_SUPPORT_UNKNOWN
:
5632 internal_error (__FILE__
, __LINE__
,
5633 _("remote_write_bytes: bad internal state"));
5635 internal_error (__FILE__
, __LINE__
, _("bad switch"));
5638 return remote_write_bytes_aux (packet_format
,
5639 memaddr
, myaddr
, len
, packet_format
[0], 1);
5642 /* Read memory data directly from the remote machine.
5643 This does not use the data cache; the data cache uses this.
5644 MEMADDR is the address in the remote memory space.
5645 MYADDR is the address of the buffer in our space.
5646 LEN is the number of bytes.
5648 Returns number of bytes transferred, or 0 for error. */
5650 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
5651 remote targets) shouldn't attempt to read the entire buffer.
5652 Instead it should read a single packet worth of data and then
5653 return the byte size of that packet to the caller. The caller (its
5654 caller and its callers caller ;-) already contains code for
5655 handling partial reads. */
5658 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
5660 struct remote_state
*rs
= get_remote_state ();
5661 int max_buf_size
; /* Max size of packet output buffer. */
5667 max_buf_size
= get_memory_read_packet_size ();
5668 /* The packet buffer will be large enough for the payload;
5669 get_memory_packet_size ensures this. */
5678 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
5680 /* construct "m"<memaddr>","<len>" */
5681 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
5682 memaddr
= remote_address_masked (memaddr
);
5685 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5687 p
+= hexnumstr (p
, (ULONGEST
) todo
);
5691 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5693 if (rs
->buf
[0] == 'E'
5694 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
5695 && rs
->buf
[3] == '\0')
5697 /* There is no correspondance between what the remote
5698 protocol uses for errors and errno codes. We would like
5699 a cleaner way of representing errors (big enough to
5700 include errno codes, bfd_error codes, and others). But
5701 for now just return EIO. */
5706 /* Reply describes memory byte by byte,
5707 each byte encoded as two hex characters. */
5710 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
5712 /* Reply is short. This means that we were able to read
5713 only part of what we wanted to. */
5714 return i
+ (origlen
- len
);
5724 /* Remote notification handler. */
5727 handle_notification (char *buf
, size_t length
)
5729 if (strncmp (buf
, "Stop:", 5) == 0)
5731 if (pending_stop_reply
)
5732 /* We've already parsed the in-flight stop-reply, but the stub
5733 for some reason thought we didn't, possibly due to timeout
5734 on its side. Just ignore it. */
5738 struct cleanup
*old_chain
;
5739 struct stop_reply
*reply
= stop_reply_xmalloc ();
5740 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
5742 remote_parse_stop_reply (buf
+ 5, reply
);
5744 discard_cleanups (old_chain
);
5746 /* Be careful to only set it after parsing, since an error
5747 may be thrown then. */
5748 pending_stop_reply
= reply
;
5750 /* Notify the event loop there's a stop reply to acknowledge
5751 and that there may be more events to fetch. */
5752 mark_async_event_handler (remote_async_get_pending_events_token
);
5756 /* We ignore notifications we don't recognize, for compatibility
5757 with newer stubs. */
5762 /* Read or write LEN bytes from inferior memory at MEMADDR,
5763 transferring to or from debugger address BUFFER. Write to inferior
5764 if SHOULD_WRITE is nonzero. Returns length of data written or
5765 read; 0 for error. TARGET is unused. */
5768 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
5769 int should_write
, struct mem_attrib
*attrib
,
5770 struct target_ops
*target
)
5774 set_general_thread (inferior_ptid
);
5777 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
5779 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
5784 /* Sends a packet with content determined by the printf format string
5785 FORMAT and the remaining arguments, then gets the reply. Returns
5786 whether the packet was a success, a failure, or unknown. */
5788 static enum packet_result
5789 remote_send_printf (const char *format
, ...)
5791 struct remote_state
*rs
= get_remote_state ();
5792 int max_size
= get_remote_packet_size ();
5795 va_start (ap
, format
);
5798 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
5799 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
5801 if (putpkt (rs
->buf
) < 0)
5802 error (_("Communication problem with target."));
5805 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5807 return packet_check_result (rs
->buf
);
5811 restore_remote_timeout (void *p
)
5813 int value
= *(int *)p
;
5814 remote_timeout
= value
;
5817 /* Flash writing can take quite some time. We'll set
5818 effectively infinite timeout for flash operations.
5819 In future, we'll need to decide on a better approach. */
5820 static const int remote_flash_timeout
= 1000;
5823 remote_flash_erase (struct target_ops
*ops
,
5824 ULONGEST address
, LONGEST length
)
5826 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
5827 int saved_remote_timeout
= remote_timeout
;
5828 enum packet_result ret
;
5830 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5831 &saved_remote_timeout
);
5832 remote_timeout
= remote_flash_timeout
;
5834 ret
= remote_send_printf ("vFlashErase:%s,%s",
5835 phex (address
, addr_size
),
5839 case PACKET_UNKNOWN
:
5840 error (_("Remote target does not support flash erase"));
5842 error (_("Error erasing flash with vFlashErase packet"));
5847 do_cleanups (back_to
);
5851 remote_flash_write (struct target_ops
*ops
,
5852 ULONGEST address
, LONGEST length
,
5853 const gdb_byte
*data
)
5855 int saved_remote_timeout
= remote_timeout
;
5857 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5858 &saved_remote_timeout
);
5860 remote_timeout
= remote_flash_timeout
;
5861 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
5862 do_cleanups (back_to
);
5868 remote_flash_done (struct target_ops
*ops
)
5870 int saved_remote_timeout
= remote_timeout
;
5872 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5873 &saved_remote_timeout
);
5875 remote_timeout
= remote_flash_timeout
;
5876 ret
= remote_send_printf ("vFlashDone");
5877 do_cleanups (back_to
);
5881 case PACKET_UNKNOWN
:
5882 error (_("Remote target does not support vFlashDone"));
5884 error (_("Error finishing flash operation"));
5891 remote_files_info (struct target_ops
*ignore
)
5893 puts_filtered ("Debugging a target over a serial line.\n");
5896 /* Stuff for dealing with the packets which are part of this protocol.
5897 See comment at top of file for details. */
5899 /* Read a single character from the remote end. */
5902 readchar (int timeout
)
5906 ch
= serial_readchar (remote_desc
, timeout
);
5911 switch ((enum serial_rc
) ch
)
5915 error (_("Remote connection closed"));
5918 perror_with_name (_("Remote communication error"));
5920 case SERIAL_TIMEOUT
:
5926 /* Send the command in *BUF to the remote machine, and read the reply
5927 into *BUF. Report an error if we get an error reply. Resize
5928 *BUF using xrealloc if necessary to hold the result, and update
5932 remote_send (char **buf
,
5936 getpkt (buf
, sizeof_buf
, 0);
5938 if ((*buf
)[0] == 'E')
5939 error (_("Remote failure reply: %s"), *buf
);
5942 /* Return a pointer to an xmalloc'ed string representing an escaped
5943 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
5944 etc. The caller is responsible for releasing the returned
5948 escape_buffer (const char *buf
, int n
)
5950 struct cleanup
*old_chain
;
5951 struct ui_file
*stb
;
5954 stb
= mem_fileopen ();
5955 old_chain
= make_cleanup_ui_file_delete (stb
);
5957 fputstrn_unfiltered (buf
, n
, 0, stb
);
5958 str
= ui_file_xstrdup (stb
, NULL
);
5959 do_cleanups (old_chain
);
5963 /* Display a null-terminated packet on stdout, for debugging, using C
5967 print_packet (char *buf
)
5969 puts_filtered ("\"");
5970 fputstr_filtered (buf
, '"', gdb_stdout
);
5971 puts_filtered ("\"");
5977 return putpkt_binary (buf
, strlen (buf
));
5980 /* Send a packet to the remote machine, with error checking. The data
5981 of the packet is in BUF. The string in BUF can be at most
5982 get_remote_packet_size () - 5 to account for the $, # and checksum,
5983 and for a possible /0 if we are debugging (remote_debug) and want
5984 to print the sent packet as a string. */
5987 putpkt_binary (char *buf
, int cnt
)
5989 struct remote_state
*rs
= get_remote_state ();
5991 unsigned char csum
= 0;
5992 char *buf2
= alloca (cnt
+ 6);
5998 /* Catch cases like trying to read memory or listing threads while
5999 we're waiting for a stop reply. The remote server wouldn't be
6000 ready to handle this request, so we'd hang and timeout. We don't
6001 have to worry about this in synchronous mode, because in that
6002 case it's not possible to issue a command while the target is
6003 running. This is not a problem in non-stop mode, because in that
6004 case, the stub is always ready to process serial input. */
6005 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
6006 error (_("Cannot execute this command while the target is running."));
6008 /* We're sending out a new packet. Make sure we don't look at a
6009 stale cached response. */
6010 rs
->cached_wait_status
= 0;
6012 /* Copy the packet into buffer BUF2, encapsulating it
6013 and giving it a checksum. */
6018 for (i
= 0; i
< cnt
; i
++)
6024 *p
++ = tohex ((csum
>> 4) & 0xf);
6025 *p
++ = tohex (csum
& 0xf);
6027 /* Send it over and over until we get a positive ack. */
6031 int started_error_output
= 0;
6035 struct cleanup
*old_chain
;
6039 str
= escape_buffer (buf2
, p
- buf2
);
6040 old_chain
= make_cleanup (xfree
, str
);
6041 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
6042 gdb_flush (gdb_stdlog
);
6043 do_cleanups (old_chain
);
6045 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6046 perror_with_name (_("putpkt: write failed"));
6048 /* If this is a no acks version of the remote protocol, send the
6049 packet and move on. */
6053 /* Read until either a timeout occurs (-2) or '+' is read.
6054 Handle any notification that arrives in the mean time. */
6057 ch
= readchar (remote_timeout
);
6065 case SERIAL_TIMEOUT
:
6068 if (started_error_output
)
6070 putchar_unfiltered ('\n');
6071 started_error_output
= 0;
6080 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6084 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6085 case SERIAL_TIMEOUT
:
6089 break; /* Retransmit buffer. */
6093 fprintf_unfiltered (gdb_stdlog
,
6094 "Packet instead of Ack, ignoring it\n");
6095 /* It's probably an old response sent because an ACK
6096 was lost. Gobble up the packet and ack it so it
6097 doesn't get retransmitted when we resend this
6100 serial_write (remote_desc
, "+", 1);
6101 continue; /* Now, go look for +. */
6108 /* If we got a notification, handle it, and go back to looking
6110 /* We've found the start of a notification. Now
6111 collect the data. */
6112 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6117 struct cleanup
*old_chain
;
6120 str
= escape_buffer (rs
->buf
, val
);
6121 old_chain
= make_cleanup (xfree
, str
);
6122 fprintf_unfiltered (gdb_stdlog
,
6123 " Notification received: %s\n",
6125 do_cleanups (old_chain
);
6127 handle_notification (rs
->buf
, val
);
6128 /* We're in sync now, rewait for the ack. */
6135 if (!started_error_output
)
6137 started_error_output
= 1;
6138 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6140 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6141 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6150 if (!started_error_output
)
6152 started_error_output
= 1;
6153 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6155 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6159 break; /* Here to retransmit. */
6163 /* This is wrong. If doing a long backtrace, the user should be
6164 able to get out next time we call QUIT, without anything as
6165 violent as interrupt_query. If we want to provide a way out of
6166 here without getting to the next QUIT, it should be based on
6167 hitting ^C twice as in remote_wait. */
6178 /* Come here after finding the start of a frame when we expected an
6179 ack. Do our best to discard the rest of this packet. */
6188 c
= readchar (remote_timeout
);
6191 case SERIAL_TIMEOUT
:
6192 /* Nothing we can do. */
6195 /* Discard the two bytes of checksum and stop. */
6196 c
= readchar (remote_timeout
);
6198 c
= readchar (remote_timeout
);
6201 case '*': /* Run length encoding. */
6202 /* Discard the repeat count. */
6203 c
= readchar (remote_timeout
);
6208 /* A regular character. */
6214 /* Come here after finding the start of the frame. Collect the rest
6215 into *BUF, verifying the checksum, length, and handling run-length
6216 compression. NUL terminate the buffer. If there is not enough room,
6217 expand *BUF using xrealloc.
6219 Returns -1 on error, number of characters in buffer (ignoring the
6220 trailing NULL) on success. (could be extended to return one of the
6221 SERIAL status indications). */
6224 read_frame (char **buf_p
,
6231 struct remote_state
*rs
= get_remote_state ();
6238 c
= readchar (remote_timeout
);
6241 case SERIAL_TIMEOUT
:
6243 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
6247 fputs_filtered ("Saw new packet start in middle of old one\n",
6249 return -1; /* Start a new packet, count retries. */
6252 unsigned char pktcsum
;
6258 check_0
= readchar (remote_timeout
);
6260 check_1
= readchar (remote_timeout
);
6262 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
6265 fputs_filtered ("Timeout in checksum, retrying\n",
6269 else if (check_0
< 0 || check_1
< 0)
6272 fputs_filtered ("Communication error in checksum\n",
6277 /* Don't recompute the checksum; with no ack packets we
6278 don't have any way to indicate a packet retransmission
6283 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
6284 if (csum
== pktcsum
)
6289 struct cleanup
*old_chain
;
6292 str
= escape_buffer (buf
, bc
);
6293 old_chain
= make_cleanup (xfree
, str
);
6294 fprintf_unfiltered (gdb_stdlog
,
6296 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6297 pktcsum
, csum
, str
);
6298 do_cleanups (old_chain
);
6300 /* Number of characters in buffer ignoring trailing
6304 case '*': /* Run length encoding. */
6309 c
= readchar (remote_timeout
);
6311 repeat
= c
- ' ' + 3; /* Compute repeat count. */
6313 /* The character before ``*'' is repeated. */
6315 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
6317 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
6319 /* Make some more room in the buffer. */
6320 *sizeof_buf
+= repeat
;
6321 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6325 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
6331 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
6335 if (bc
>= *sizeof_buf
- 1)
6337 /* Make some more room in the buffer. */
6339 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6350 /* Read a packet from the remote machine, with error checking, and
6351 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6352 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6353 rather than timing out; this is used (in synchronous mode) to wait
6354 for a target that is is executing user code to stop. */
6355 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6356 don't have to change all the calls to getpkt to deal with the
6357 return value, because at the moment I don't know what the right
6358 thing to do it for those. */
6366 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
6370 /* Read a packet from the remote machine, with error checking, and
6371 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6372 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6373 rather than timing out; this is used (in synchronous mode) to wait
6374 for a target that is is executing user code to stop. If FOREVER ==
6375 0, this function is allowed to time out gracefully and return an
6376 indication of this to the caller. Otherwise return the number of
6377 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6378 enough reason to return to the caller. */
6381 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
6382 int expecting_notif
)
6384 struct remote_state
*rs
= get_remote_state ();
6390 /* We're reading a new response. Make sure we don't look at a
6391 previously cached response. */
6392 rs
->cached_wait_status
= 0;
6394 strcpy (*buf
, "timeout");
6397 timeout
= watchdog
> 0 ? watchdog
: -1;
6398 else if (expecting_notif
)
6399 timeout
= 0; /* There should already be a char in the buffer. If
6402 timeout
= remote_timeout
;
6406 /* Process any number of notifications, and then return when
6410 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
6412 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
6414 /* This can loop forever if the remote side sends us
6415 characters continuously, but if it pauses, we'll get
6416 SERIAL_TIMEOUT from readchar because of timeout. Then
6417 we'll count that as a retry.
6419 Note that even when forever is set, we will only wait
6420 forever prior to the start of a packet. After that, we
6421 expect characters to arrive at a brisk pace. They should
6422 show up within remote_timeout intervals. */
6424 c
= readchar (timeout
);
6425 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
6427 if (c
== SERIAL_TIMEOUT
)
6429 if (expecting_notif
)
6430 return -1; /* Don't complain, it's normal to not get
6431 anything in this case. */
6433 if (forever
) /* Watchdog went off? Kill the target. */
6437 error (_("Watchdog timeout has expired. Target detached."));
6440 fputs_filtered ("Timed out.\n", gdb_stdlog
);
6444 /* We've found the start of a packet or notification.
6445 Now collect the data. */
6446 val
= read_frame (buf
, sizeof_buf
);
6451 serial_write (remote_desc
, "-", 1);
6454 if (tries
> MAX_TRIES
)
6456 /* We have tried hard enough, and just can't receive the
6457 packet/notification. Give up. */
6458 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
6460 /* Skip the ack char if we're in no-ack mode. */
6461 if (!rs
->noack_mode
)
6462 serial_write (remote_desc
, "+", 1);
6466 /* If we got an ordinary packet, return that to our caller. */
6471 struct cleanup
*old_chain
;
6474 str
= escape_buffer (*buf
, val
);
6475 old_chain
= make_cleanup (xfree
, str
);
6476 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
6477 do_cleanups (old_chain
);
6480 /* Skip the ack char if we're in no-ack mode. */
6481 if (!rs
->noack_mode
)
6482 serial_write (remote_desc
, "+", 1);
6486 /* If we got a notification, handle it, and go back to looking
6490 gdb_assert (c
== '%');
6494 struct cleanup
*old_chain
;
6497 str
= escape_buffer (*buf
, val
);
6498 old_chain
= make_cleanup (xfree
, str
);
6499 fprintf_unfiltered (gdb_stdlog
,
6500 " Notification received: %s\n",
6502 do_cleanups (old_chain
);
6505 handle_notification (*buf
, val
);
6507 /* Notifications require no acknowledgement. */
6509 if (expecting_notif
)
6516 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
6518 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
6522 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
6524 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
6529 remote_kill (struct target_ops
*ops
)
6531 /* Use catch_errors so the user can quit from gdb even when we
6532 aren't on speaking terms with the remote system. */
6533 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
6535 /* Don't wait for it to die. I'm not really sure it matters whether
6536 we do or not. For the existing stubs, kill is a noop. */
6537 target_mourn_inferior ();
6541 remote_vkill (int pid
, struct remote_state
*rs
)
6543 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6546 /* Tell the remote target to detach. */
6547 sprintf (rs
->buf
, "vKill;%x", pid
);
6549 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6551 if (packet_ok (rs
->buf
,
6552 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
6554 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6561 extended_remote_kill (struct target_ops
*ops
)
6564 int pid
= ptid_get_pid (inferior_ptid
);
6565 struct remote_state
*rs
= get_remote_state ();
6567 res
= remote_vkill (pid
, rs
);
6568 if (res
== -1 && !remote_multi_process_p (rs
))
6570 /* Don't try 'k' on a multi-process aware stub -- it has no way
6571 to specify the pid. */
6575 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6576 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
6579 /* Don't wait for it to die. I'm not really sure it matters whether
6580 we do or not. For the existing stubs, kill is a noop. */
6586 error (_("Can't kill process"));
6588 target_mourn_inferior ();
6592 remote_mourn (struct target_ops
*ops
)
6594 remote_mourn_1 (ops
);
6597 /* Worker function for remote_mourn. */
6599 remote_mourn_1 (struct target_ops
*target
)
6601 unpush_target (target
);
6603 /* remote_close takes care of doing most of the clean up. */
6604 generic_mourn_inferior ();
6608 extended_remote_mourn_1 (struct target_ops
*target
)
6610 struct remote_state
*rs
= get_remote_state ();
6612 /* In case we got here due to an error, but we're going to stay
6614 rs
->waiting_for_stop_reply
= 0;
6616 /* We're no longer interested in these events. */
6617 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
6619 /* If the current general thread belonged to the process we just
6620 detached from or has exited, the remote side current general
6621 thread becomes undefined. Considering a case like this:
6623 - We just got here due to a detach.
6624 - The process that we're detaching from happens to immediately
6625 report a global breakpoint being hit in non-stop mode, in the
6626 same thread we had selected before.
6627 - GDB attaches to this process again.
6628 - This event happens to be the next event we handle.
6630 GDB would consider that the current general thread didn't need to
6631 be set on the stub side (with Hg), since for all it knew,
6632 GENERAL_THREAD hadn't changed.
6634 Notice that although in all-stop mode, the remote server always
6635 sets the current thread to the thread reporting the stop event,
6636 that doesn't happen in non-stop mode; in non-stop, the stub *must
6637 not* change the current thread when reporting a breakpoint hit,
6638 due to the decoupling of event reporting and event handling.
6640 To keep things simple, we always invalidate our notion of the
6642 record_currthread (minus_one_ptid
);
6644 /* Unlike "target remote", we do not want to unpush the target; then
6645 the next time the user says "run", we won't be connected. */
6647 /* Call common code to mark the inferior as not running. */
6648 generic_mourn_inferior ();
6650 if (!have_inferiors ())
6652 if (!remote_multi_process_p (rs
))
6654 /* Check whether the target is running now - some remote stubs
6655 automatically restart after kill. */
6657 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6659 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
6661 /* Assume that the target has been restarted. Set inferior_ptid
6662 so that bits of core GDB realizes there's something here, e.g.,
6663 so that the user can say "kill" again. */
6664 inferior_ptid
= magic_null_ptid
;
6671 extended_remote_mourn (struct target_ops
*ops
)
6673 extended_remote_mourn_1 (ops
);
6677 extended_remote_run (char *args
)
6679 struct remote_state
*rs
= get_remote_state ();
6682 /* If the user has disabled vRun support, or we have detected that
6683 support is not available, do not try it. */
6684 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6687 strcpy (rs
->buf
, "vRun;");
6688 len
= strlen (rs
->buf
);
6690 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
6691 error (_("Remote file name too long for run packet"));
6692 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
6694 gdb_assert (args
!= NULL
);
6697 struct cleanup
*back_to
;
6701 argv
= gdb_buildargv (args
);
6702 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
6703 for (i
= 0; argv
[i
] != NULL
; i
++)
6705 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
6706 error (_("Argument list too long for run packet"));
6707 rs
->buf
[len
++] = ';';
6708 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
6710 do_cleanups (back_to
);
6713 rs
->buf
[len
++] = '\0';
6716 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6718 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
6720 /* We have a wait response; we don't need it, though. All is well. */
6723 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6724 /* It wasn't disabled before, but it is now. */
6728 if (remote_exec_file
[0] == '\0')
6729 error (_("Running the default executable on the remote target failed; "
6730 "try \"set remote exec-file\"?"));
6732 error (_("Running \"%s\" on the remote target failed"),
6737 /* In the extended protocol we want to be able to do things like
6738 "run" and have them basically work as expected. So we need
6739 a special create_inferior function. We support changing the
6740 executable file and the command line arguments, but not the
6744 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
6745 char **env
, int from_tty
)
6747 /* If running asynchronously, register the target file descriptor
6748 with the event loop. */
6749 if (target_can_async_p ())
6750 target_async (inferior_event_handler
, 0);
6752 /* Now restart the remote server. */
6753 if (extended_remote_run (args
) == -1)
6755 /* vRun was not supported. Fail if we need it to do what the
6757 if (remote_exec_file
[0])
6758 error (_("Remote target does not support \"set remote exec-file\""));
6760 error (_("Remote target does not support \"set args\" or run <ARGS>"));
6762 /* Fall back to "R". */
6763 extended_remote_restart ();
6766 /* Clean up from the last time we ran, before we mark the target
6767 running again. This will mark breakpoints uninserted, and
6768 get_offsets may insert breakpoints. */
6769 init_thread_list ();
6770 init_wait_for_inferior ();
6772 /* Now mark the inferior as running before we do anything else. */
6773 inferior_ptid
= magic_null_ptid
;
6775 /* Now, if we have thread information, update inferior_ptid. */
6776 inferior_ptid
= remote_current_thread (inferior_ptid
);
6778 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
6779 add_thread_silent (inferior_ptid
);
6781 /* Get updated offsets, if the stub uses qOffsets. */
6786 extended_remote_create_inferior (struct target_ops
*ops
,
6787 char *exec_file
, char *args
,
6788 char **env
, int from_tty
)
6790 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
6794 /* Insert a breakpoint. On targets that have software breakpoint
6795 support, we ask the remote target to do the work; on targets
6796 which don't, we insert a traditional memory breakpoint. */
6799 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
6800 struct bp_target_info
*bp_tgt
)
6802 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
6803 If it succeeds, then set the support to PACKET_ENABLE. If it
6804 fails, and the user has explicitly requested the Z support then
6805 report an error, otherwise, mark it disabled and go on. */
6807 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6809 CORE_ADDR addr
= bp_tgt
->placed_address
;
6810 struct remote_state
*rs
;
6814 gdbarch_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
6816 rs
= get_remote_state ();
6822 addr
= (ULONGEST
) remote_address_masked (addr
);
6823 p
+= hexnumstr (p
, addr
);
6824 sprintf (p
, ",%d", bpsize
);
6827 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6829 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
6834 bp_tgt
->placed_address
= addr
;
6835 bp_tgt
->placed_size
= bpsize
;
6837 case PACKET_UNKNOWN
:
6842 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
6846 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
6847 struct bp_target_info
*bp_tgt
)
6849 CORE_ADDR addr
= bp_tgt
->placed_address
;
6850 struct remote_state
*rs
= get_remote_state ();
6852 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6860 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
6861 p
+= hexnumstr (p
, addr
);
6862 sprintf (p
, ",%d", bp_tgt
->placed_size
);
6865 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6867 return (rs
->buf
[0] == 'E');
6870 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
6874 watchpoint_to_Z_packet (int type
)
6879 return Z_PACKET_WRITE_WP
;
6882 return Z_PACKET_READ_WP
;
6885 return Z_PACKET_ACCESS_WP
;
6888 internal_error (__FILE__
, __LINE__
,
6889 _("hw_bp_to_z: bad watchpoint type %d"), type
);
6894 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
6896 struct remote_state
*rs
= get_remote_state ();
6898 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6900 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6903 sprintf (rs
->buf
, "Z%x,", packet
);
6904 p
= strchr (rs
->buf
, '\0');
6905 addr
= remote_address_masked (addr
);
6906 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6907 sprintf (p
, ",%x", len
);
6910 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6912 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6915 case PACKET_UNKNOWN
:
6920 internal_error (__FILE__
, __LINE__
,
6921 _("remote_insert_watchpoint: reached end of function"));
6926 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
6928 struct remote_state
*rs
= get_remote_state ();
6930 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6932 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6935 sprintf (rs
->buf
, "z%x,", packet
);
6936 p
= strchr (rs
->buf
, '\0');
6937 addr
= remote_address_masked (addr
);
6938 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6939 sprintf (p
, ",%x", len
);
6941 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6943 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6946 case PACKET_UNKNOWN
:
6951 internal_error (__FILE__
, __LINE__
,
6952 _("remote_remove_watchpoint: reached end of function"));
6956 int remote_hw_watchpoint_limit
= -1;
6957 int remote_hw_breakpoint_limit
= -1;
6960 remote_check_watch_resources (int type
, int cnt
, int ot
)
6962 if (type
== bp_hardware_breakpoint
)
6964 if (remote_hw_breakpoint_limit
== 0)
6966 else if (remote_hw_breakpoint_limit
< 0)
6968 else if (cnt
<= remote_hw_breakpoint_limit
)
6973 if (remote_hw_watchpoint_limit
== 0)
6975 else if (remote_hw_watchpoint_limit
< 0)
6979 else if (cnt
<= remote_hw_watchpoint_limit
)
6986 remote_stopped_by_watchpoint (void)
6988 return remote_stopped_by_watchpoint_p
;
6992 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
6995 if (remote_stopped_by_watchpoint ())
6997 *addr_p
= remote_watch_data_address
;
7006 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7007 struct bp_target_info
*bp_tgt
)
7010 struct remote_state
*rs
;
7013 /* The length field should be set to the size of a breakpoint
7014 instruction, even though we aren't inserting one ourselves. */
7016 gdbarch_breakpoint_from_pc
7017 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7019 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7022 rs
= get_remote_state ();
7029 addr
= remote_address_masked (bp_tgt
->placed_address
);
7030 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7031 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7034 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7036 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7039 case PACKET_UNKNOWN
:
7044 internal_error (__FILE__
, __LINE__
,
7045 _("remote_insert_hw_breakpoint: reached end of function"));
7050 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7051 struct bp_target_info
*bp_tgt
)
7054 struct remote_state
*rs
= get_remote_state ();
7057 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7064 addr
= remote_address_masked (bp_tgt
->placed_address
);
7065 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7066 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7069 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7071 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7074 case PACKET_UNKNOWN
:
7079 internal_error (__FILE__
, __LINE__
,
7080 _("remote_remove_hw_breakpoint: reached end of function"));
7083 /* Table used by the crc32 function to calcuate the checksum. */
7085 static unsigned long crc32_table
[256] =
7088 static unsigned long
7089 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
7091 if (!crc32_table
[1])
7093 /* Initialize the CRC table and the decoding table. */
7097 for (i
= 0; i
< 256; i
++)
7099 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7100 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7107 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7113 /* compare-sections command
7115 With no arguments, compares each loadable section in the exec bfd
7116 with the same memory range on the target, and reports mismatches.
7117 Useful for verifying the image on the target against the exec file.
7118 Depends on the target understanding the new "qCRC:" request. */
7120 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7121 target method (target verify memory) and generic version of the
7122 actual command. This will allow other high-level code (especially
7123 generic_load()) to make use of this target functionality. */
7126 compare_sections_command (char *args
, int from_tty
)
7128 struct remote_state
*rs
= get_remote_state ();
7130 unsigned long host_crc
, target_crc
;
7131 struct cleanup
*old_chain
;
7134 const char *sectname
;
7141 error (_("command cannot be used without an exec file"));
7142 if (!current_target
.to_shortname
||
7143 strcmp (current_target
.to_shortname
, "remote") != 0)
7144 error (_("command can only be used with remote target"));
7146 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7148 if (!(s
->flags
& SEC_LOAD
))
7149 continue; /* skip non-loadable section */
7151 size
= bfd_get_section_size (s
);
7153 continue; /* skip zero-length section */
7155 sectname
= bfd_get_section_name (exec_bfd
, s
);
7156 if (args
&& strcmp (args
, sectname
) != 0)
7157 continue; /* not the section selected by user */
7159 matched
= 1; /* do this section */
7161 /* FIXME: assumes lma can fit into long. */
7162 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7163 (long) lma
, (long) size
);
7166 /* Be clever; compute the host_crc before waiting for target
7168 sectdata
= xmalloc (size
);
7169 old_chain
= make_cleanup (xfree
, sectdata
);
7170 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7171 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
7173 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7174 if (rs
->buf
[0] == 'E')
7175 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
7176 paddress (target_gdbarch
, lma
),
7177 paddress (target_gdbarch
, lma
+ size
));
7178 if (rs
->buf
[0] != 'C')
7179 error (_("remote target does not support this operation"));
7181 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7182 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7184 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
7185 paddress (target_gdbarch
, lma
),
7186 paddress (target_gdbarch
, lma
+ size
));
7187 if (host_crc
== target_crc
)
7188 printf_filtered ("matched.\n");
7191 printf_filtered ("MIS-MATCHED!\n");
7195 do_cleanups (old_chain
);
7198 warning (_("One or more sections of the remote executable does not match\n\
7199 the loaded file\n"));
7200 if (args
&& !matched
)
7201 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7204 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7205 into remote target. The number of bytes written to the remote
7206 target is returned, or -1 for error. */
7209 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7210 const char *annex
, const gdb_byte
*writebuf
,
7211 ULONGEST offset
, LONGEST len
,
7212 struct packet_config
*packet
)
7216 struct remote_state
*rs
= get_remote_state ();
7217 int max_size
= get_memory_write_packet_size ();
7219 if (packet
->support
== PACKET_DISABLE
)
7222 /* Insert header. */
7223 i
= snprintf (rs
->buf
, max_size
,
7224 "qXfer:%s:write:%s:%s:",
7225 object_name
, annex
? annex
: "",
7226 phex_nz (offset
, sizeof offset
));
7227 max_size
-= (i
+ 1);
7229 /* Escape as much data as fits into rs->buf. */
7230 buf_len
= remote_escape_output
7231 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
7233 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
7234 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7235 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7238 unpack_varlen_hex (rs
->buf
, &n
);
7242 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7243 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7244 number of bytes read is returned, or 0 for EOF, or -1 for error.
7245 The number of bytes read may be less than LEN without indicating an
7246 EOF. PACKET is checked and updated to indicate whether the remote
7247 target supports this object. */
7250 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
7252 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
7253 struct packet_config
*packet
)
7255 static char *finished_object
;
7256 static char *finished_annex
;
7257 static ULONGEST finished_offset
;
7259 struct remote_state
*rs
= get_remote_state ();
7260 LONGEST i
, n
, packet_len
;
7262 if (packet
->support
== PACKET_DISABLE
)
7265 /* Check whether we've cached an end-of-object packet that matches
7267 if (finished_object
)
7269 if (strcmp (object_name
, finished_object
) == 0
7270 && strcmp (annex
? annex
: "", finished_annex
) == 0
7271 && offset
== finished_offset
)
7274 /* Otherwise, we're now reading something different. Discard
7276 xfree (finished_object
);
7277 xfree (finished_annex
);
7278 finished_object
= NULL
;
7279 finished_annex
= NULL
;
7282 /* Request only enough to fit in a single packet. The actual data
7283 may not, since we don't know how much of it will need to be escaped;
7284 the target is free to respond with slightly less data. We subtract
7285 five to account for the response type and the protocol frame. */
7286 n
= min (get_remote_packet_size () - 5, len
);
7287 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7288 object_name
, annex
? annex
: "",
7289 phex_nz (offset
, sizeof offset
),
7290 phex_nz (n
, sizeof n
));
7291 i
= putpkt (rs
->buf
);
7296 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
7297 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7300 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
7301 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
7303 /* 'm' means there is (or at least might be) more data after this
7304 batch. That does not make sense unless there's at least one byte
7305 of data in this reply. */
7306 if (rs
->buf
[0] == 'm' && packet_len
== 1)
7307 error (_("Remote qXfer reply contained no data."));
7309 /* Got some data. */
7310 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
7312 /* 'l' is an EOF marker, possibly including a final block of data,
7313 or possibly empty. If we have the final block of a non-empty
7314 object, record this fact to bypass a subsequent partial read. */
7315 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
7317 finished_object
= xstrdup (object_name
);
7318 finished_annex
= xstrdup (annex
? annex
: "");
7319 finished_offset
= offset
+ i
;
7326 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
7327 const char *annex
, gdb_byte
*readbuf
,
7328 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
7330 struct remote_state
*rs
;
7335 set_general_thread (inferior_ptid
);
7337 rs
= get_remote_state ();
7339 /* Handle memory using the standard memory routines. */
7340 if (object
== TARGET_OBJECT_MEMORY
)
7345 /* If the remote target is connected but not running, we should
7346 pass this request down to a lower stratum (e.g. the executable
7348 if (!target_has_execution
)
7351 if (writebuf
!= NULL
)
7352 xfered
= remote_write_bytes (offset
, writebuf
, len
);
7354 xfered
= remote_read_bytes (offset
, readbuf
, len
);
7358 else if (xfered
== 0 && errno
== 0)
7364 /* Handle SPU memory using qxfer packets. */
7365 if (object
== TARGET_OBJECT_SPU
)
7368 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
7369 &remote_protocol_packets
7370 [PACKET_qXfer_spu_read
]);
7372 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
7373 &remote_protocol_packets
7374 [PACKET_qXfer_spu_write
]);
7377 /* Handle extra signal info using qxfer packets. */
7378 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
7381 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
7382 &remote_protocol_packets
7383 [PACKET_qXfer_siginfo_read
]);
7385 return remote_write_qxfer (ops
, "siginfo", annex
, writebuf
, offset
, len
,
7386 &remote_protocol_packets
7387 [PACKET_qXfer_siginfo_write
]);
7390 /* Only handle flash writes. */
7391 if (writebuf
!= NULL
)
7397 case TARGET_OBJECT_FLASH
:
7398 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
7402 else if (xfered
== 0 && errno
== 0)
7412 /* Map pre-existing objects onto letters. DO NOT do this for new
7413 objects!!! Instead specify new query packets. */
7416 case TARGET_OBJECT_AVR
:
7420 case TARGET_OBJECT_AUXV
:
7421 gdb_assert (annex
== NULL
);
7422 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
7423 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
7425 case TARGET_OBJECT_AVAILABLE_FEATURES
:
7426 return remote_read_qxfer
7427 (ops
, "features", annex
, readbuf
, offset
, len
,
7428 &remote_protocol_packets
[PACKET_qXfer_features
]);
7430 case TARGET_OBJECT_LIBRARIES
:
7431 return remote_read_qxfer
7432 (ops
, "libraries", annex
, readbuf
, offset
, len
,
7433 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
7435 case TARGET_OBJECT_MEMORY_MAP
:
7436 gdb_assert (annex
== NULL
);
7437 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
7438 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
7440 case TARGET_OBJECT_OSDATA
:
7441 /* Should only get here if we're connected. */
7442 gdb_assert (remote_desc
);
7443 return remote_read_qxfer
7444 (ops
, "osdata", annex
, readbuf
, offset
, len
,
7445 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
7451 /* Note: a zero OFFSET and LEN can be used to query the minimum
7453 if (offset
== 0 && len
== 0)
7454 return (get_remote_packet_size ());
7455 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7456 large enough let the caller deal with it. */
7457 if (len
< get_remote_packet_size ())
7459 len
= get_remote_packet_size ();
7461 /* Except for querying the minimum buffer size, target must be open. */
7463 error (_("remote query is only available after target open"));
7465 gdb_assert (annex
!= NULL
);
7466 gdb_assert (readbuf
!= NULL
);
7472 /* We used one buffer char for the remote protocol q command and
7473 another for the query type. As the remote protocol encapsulation
7474 uses 4 chars plus one extra in case we are debugging
7475 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7478 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
7480 /* Bad caller may have sent forbidden characters. */
7481 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
7486 gdb_assert (annex
[i
] == '\0');
7488 i
= putpkt (rs
->buf
);
7492 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7493 strcpy ((char *) readbuf
, rs
->buf
);
7495 return strlen ((char *) readbuf
);
7499 remote_search_memory (struct target_ops
* ops
,
7500 CORE_ADDR start_addr
, ULONGEST search_space_len
,
7501 const gdb_byte
*pattern
, ULONGEST pattern_len
,
7502 CORE_ADDR
*found_addrp
)
7504 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
7505 struct remote_state
*rs
= get_remote_state ();
7506 int max_size
= get_memory_write_packet_size ();
7507 struct packet_config
*packet
=
7508 &remote_protocol_packets
[PACKET_qSearch_memory
];
7509 /* number of packet bytes used to encode the pattern,
7510 this could be more than PATTERN_LEN due to escape characters */
7511 int escaped_pattern_len
;
7512 /* amount of pattern that was encodable in the packet */
7513 int used_pattern_len
;
7516 ULONGEST found_addr
;
7518 /* Don't go to the target if we don't have to.
7519 This is done before checking packet->support to avoid the possibility that
7520 a success for this edge case means the facility works in general. */
7521 if (pattern_len
> search_space_len
)
7523 if (pattern_len
== 0)
7525 *found_addrp
= start_addr
;
7529 /* If we already know the packet isn't supported, fall back to the simple
7530 way of searching memory. */
7532 if (packet
->support
== PACKET_DISABLE
)
7534 /* Target doesn't provided special support, fall back and use the
7535 standard support (copy memory and do the search here). */
7536 return simple_search_memory (ops
, start_addr
, search_space_len
,
7537 pattern
, pattern_len
, found_addrp
);
7540 /* Insert header. */
7541 i
= snprintf (rs
->buf
, max_size
,
7542 "qSearch:memory:%s;%s;",
7543 phex_nz (start_addr
, addr_size
),
7544 phex_nz (search_space_len
, sizeof (search_space_len
)));
7545 max_size
-= (i
+ 1);
7547 /* Escape as much data as fits into rs->buf. */
7548 escaped_pattern_len
=
7549 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
7550 &used_pattern_len
, max_size
);
7552 /* Bail if the pattern is too large. */
7553 if (used_pattern_len
!= pattern_len
)
7554 error ("Pattern is too large to transmit to remote target.");
7556 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
7557 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7558 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7560 /* The request may not have worked because the command is not
7561 supported. If so, fall back to the simple way. */
7562 if (packet
->support
== PACKET_DISABLE
)
7564 return simple_search_memory (ops
, start_addr
, search_space_len
,
7565 pattern
, pattern_len
, found_addrp
);
7570 if (rs
->buf
[0] == '0')
7572 else if (rs
->buf
[0] == '1')
7575 if (rs
->buf
[1] != ',')
7576 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7577 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
7578 *found_addrp
= found_addr
;
7581 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7587 remote_rcmd (char *command
,
7588 struct ui_file
*outbuf
)
7590 struct remote_state
*rs
= get_remote_state ();
7594 error (_("remote rcmd is only available after target open"));
7596 /* Send a NULL command across as an empty command. */
7597 if (command
== NULL
)
7600 /* The query prefix. */
7601 strcpy (rs
->buf
, "qRcmd,");
7602 p
= strchr (rs
->buf
, '\0');
7604 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
7605 error (_("\"monitor\" command ``%s'' is too long."), command
);
7607 /* Encode the actual command. */
7608 bin2hex ((gdb_byte
*) command
, p
, 0);
7610 if (putpkt (rs
->buf
) < 0)
7611 error (_("Communication problem with target."));
7613 /* get/display the response */
7618 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
7620 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7623 error (_("Target does not support this command."));
7624 if (buf
[0] == 'O' && buf
[1] != 'K')
7626 remote_console_output (buf
+ 1); /* 'O' message from stub. */
7629 if (strcmp (buf
, "OK") == 0)
7631 if (strlen (buf
) == 3 && buf
[0] == 'E'
7632 && isdigit (buf
[1]) && isdigit (buf
[2]))
7634 error (_("Protocol error with Rcmd"));
7636 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
7638 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
7639 fputc_unfiltered (c
, outbuf
);
7645 static VEC(mem_region_s
) *
7646 remote_memory_map (struct target_ops
*ops
)
7648 VEC(mem_region_s
) *result
= NULL
;
7649 char *text
= target_read_stralloc (¤t_target
,
7650 TARGET_OBJECT_MEMORY_MAP
, NULL
);
7654 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
7655 result
= parse_memory_map (text
);
7656 do_cleanups (back_to
);
7663 packet_command (char *args
, int from_tty
)
7665 struct remote_state
*rs
= get_remote_state ();
7668 error (_("command can only be used with remote target"));
7671 error (_("remote-packet command requires packet text as argument"));
7673 puts_filtered ("sending: ");
7674 print_packet (args
);
7675 puts_filtered ("\n");
7678 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7679 puts_filtered ("received: ");
7680 print_packet (rs
->buf
);
7681 puts_filtered ("\n");
7685 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
7687 static void display_thread_info (struct gdb_ext_thread_info
*info
);
7689 static void threadset_test_cmd (char *cmd
, int tty
);
7691 static void threadalive_test (char *cmd
, int tty
);
7693 static void threadlist_test_cmd (char *cmd
, int tty
);
7695 int get_and_display_threadinfo (threadref
*ref
);
7697 static void threadinfo_test_cmd (char *cmd
, int tty
);
7699 static int thread_display_step (threadref
*ref
, void *context
);
7701 static void threadlist_update_test_cmd (char *cmd
, int tty
);
7703 static void init_remote_threadtests (void);
7705 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
7708 threadset_test_cmd (char *cmd
, int tty
)
7710 int sample_thread
= SAMPLE_THREAD
;
7712 printf_filtered (_("Remote threadset test\n"));
7713 set_general_thread (sample_thread
);
7718 threadalive_test (char *cmd
, int tty
)
7720 int sample_thread
= SAMPLE_THREAD
;
7721 int pid
= ptid_get_pid (inferior_ptid
);
7722 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
7724 if (remote_thread_alive (ptid
))
7725 printf_filtered ("PASS: Thread alive test\n");
7727 printf_filtered ("FAIL: Thread alive test\n");
7730 void output_threadid (char *title
, threadref
*ref
);
7733 output_threadid (char *title
, threadref
*ref
)
7737 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
7739 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
7743 threadlist_test_cmd (char *cmd
, int tty
)
7746 threadref nextthread
;
7747 int done
, result_count
;
7748 threadref threadlist
[3];
7750 printf_filtered ("Remote Threadlist test\n");
7751 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
7752 &result_count
, &threadlist
[0]))
7753 printf_filtered ("FAIL: threadlist test\n");
7756 threadref
*scan
= threadlist
;
7757 threadref
*limit
= scan
+ result_count
;
7759 while (scan
< limit
)
7760 output_threadid (" thread ", scan
++);
7765 display_thread_info (struct gdb_ext_thread_info
*info
)
7767 output_threadid ("Threadid: ", &info
->threadid
);
7768 printf_filtered ("Name: %s\n ", info
->shortname
);
7769 printf_filtered ("State: %s\n", info
->display
);
7770 printf_filtered ("other: %s\n\n", info
->more_display
);
7774 get_and_display_threadinfo (threadref
*ref
)
7778 struct gdb_ext_thread_info threadinfo
;
7780 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
7781 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
7782 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
7783 display_thread_info (&threadinfo
);
7788 threadinfo_test_cmd (char *cmd
, int tty
)
7790 int athread
= SAMPLE_THREAD
;
7794 int_to_threadref (&thread
, athread
);
7795 printf_filtered ("Remote Threadinfo test\n");
7796 if (!get_and_display_threadinfo (&thread
))
7797 printf_filtered ("FAIL cannot get thread info\n");
7801 thread_display_step (threadref
*ref
, void *context
)
7803 /* output_threadid(" threadstep ",ref); *//* simple test */
7804 return get_and_display_threadinfo (ref
);
7808 threadlist_update_test_cmd (char *cmd
, int tty
)
7810 printf_filtered ("Remote Threadlist update test\n");
7811 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
7815 init_remote_threadtests (void)
7817 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
7818 Fetch and print the remote list of thread identifiers, one pkt only"));
7819 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
7820 _("Fetch and display info about one thread"));
7821 add_com ("tset", class_obscure
, threadset_test_cmd
,
7822 _("Test setting to a different thread"));
7823 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
7824 _("Iterate through updating all remote thread info"));
7825 add_com ("talive", class_obscure
, threadalive_test
,
7826 _(" Remote thread alive test "));
7831 /* Convert a thread ID to a string. Returns the string in a static
7835 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
7837 static char buf
[64];
7838 struct remote_state
*rs
= get_remote_state ();
7840 if (ptid_is_pid (ptid
))
7842 /* Printing an inferior target id. */
7844 /* When multi-process extensions are off, there's no way in the
7845 remote protocol to know the remote process id, if there's any
7846 at all. There's one exception --- when we're connected with
7847 target extended-remote, and we manually attached to a process
7848 with "attach PID". We don't record anywhere a flag that
7849 allows us to distinguish that case from the case of
7850 connecting with extended-remote and the stub already being
7851 attached to a process, and reporting yes to qAttached, hence
7852 no smart special casing here. */
7853 if (!remote_multi_process_p (rs
))
7855 xsnprintf (buf
, sizeof buf
, "Remote target");
7859 return normal_pid_to_str (ptid
);
7863 if (ptid_equal (magic_null_ptid
, ptid
))
7864 xsnprintf (buf
, sizeof buf
, "Thread <main>");
7865 else if (remote_multi_process_p (rs
))
7866 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
7867 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
7869 xsnprintf (buf
, sizeof buf
, "Thread %ld",
7870 ptid_get_tid (ptid
));
7875 /* Get the address of the thread local variable in OBJFILE which is
7876 stored at OFFSET within the thread local storage for thread PTID. */
7879 remote_get_thread_local_address (struct target_ops
*ops
,
7880 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
7882 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
7884 struct remote_state
*rs
= get_remote_state ();
7886 char *endp
= rs
->buf
+ get_remote_packet_size ();
7887 enum packet_result result
;
7889 strcpy (p
, "qGetTLSAddr:");
7891 p
= write_ptid (p
, endp
, ptid
);
7893 p
+= hexnumstr (p
, offset
);
7895 p
+= hexnumstr (p
, lm
);
7899 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7900 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
7901 if (result
== PACKET_OK
)
7905 unpack_varlen_hex (rs
->buf
, &result
);
7908 else if (result
== PACKET_UNKNOWN
)
7909 throw_error (TLS_GENERIC_ERROR
,
7910 _("Remote target doesn't support qGetTLSAddr packet"));
7912 throw_error (TLS_GENERIC_ERROR
,
7913 _("Remote target failed to process qGetTLSAddr request"));
7916 throw_error (TLS_GENERIC_ERROR
,
7917 _("TLS not supported or disabled on this target"));
7922 /* Support for inferring a target description based on the current
7923 architecture and the size of a 'g' packet. While the 'g' packet
7924 can have any size (since optional registers can be left off the
7925 end), some sizes are easily recognizable given knowledge of the
7926 approximate architecture. */
7928 struct remote_g_packet_guess
7931 const struct target_desc
*tdesc
;
7933 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
7934 DEF_VEC_O(remote_g_packet_guess_s
);
7936 struct remote_g_packet_data
7938 VEC(remote_g_packet_guess_s
) *guesses
;
7941 static struct gdbarch_data
*remote_g_packet_data_handle
;
7944 remote_g_packet_data_init (struct obstack
*obstack
)
7946 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
7950 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
7951 const struct target_desc
*tdesc
)
7953 struct remote_g_packet_data
*data
7954 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
7955 struct remote_g_packet_guess new_guess
, *guess
;
7958 gdb_assert (tdesc
!= NULL
);
7961 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7963 if (guess
->bytes
== bytes
)
7964 internal_error (__FILE__
, __LINE__
,
7965 "Duplicate g packet description added for size %d",
7968 new_guess
.bytes
= bytes
;
7969 new_guess
.tdesc
= tdesc
;
7970 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
7973 /* Return 1 if remote_read_description would do anything on this target
7974 and architecture, 0 otherwise. */
7977 remote_read_description_p (struct target_ops
*target
)
7979 struct remote_g_packet_data
*data
7980 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7982 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7988 static const struct target_desc
*
7989 remote_read_description (struct target_ops
*target
)
7991 struct remote_g_packet_data
*data
7992 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7994 /* Do not try this during initial connection, when we do not know
7995 whether there is a running but stopped thread. */
7996 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
7999 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8001 struct remote_g_packet_guess
*guess
;
8003 int bytes
= send_g_packet ();
8006 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8008 if (guess
->bytes
== bytes
)
8009 return guess
->tdesc
;
8011 /* We discard the g packet. A minor optimization would be to
8012 hold on to it, and fill the register cache once we have selected
8013 an architecture, but it's too tricky to do safely. */
8019 /* Remote file transfer support. This is host-initiated I/O, not
8020 target-initiated; for target-initiated, see remote-fileio.c. */
8022 /* If *LEFT is at least the length of STRING, copy STRING to
8023 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8024 decrease *LEFT. Otherwise raise an error. */
8027 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8029 int len
= strlen (string
);
8032 error (_("Packet too long for target."));
8034 memcpy (*buffer
, string
, len
);
8038 /* NUL-terminate the buffer as a convenience, if there is
8044 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8045 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8046 decrease *LEFT. Otherwise raise an error. */
8049 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8052 if (2 * len
> *left
)
8053 error (_("Packet too long for target."));
8055 bin2hex (bytes
, *buffer
, len
);
8059 /* NUL-terminate the buffer as a convenience, if there is
8065 /* If *LEFT is large enough, convert VALUE to hex and add it to
8066 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8067 decrease *LEFT. Otherwise raise an error. */
8070 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8072 int len
= hexnumlen (value
);
8075 error (_("Packet too long for target."));
8077 hexnumstr (*buffer
, value
);
8081 /* NUL-terminate the buffer as a convenience, if there is
8087 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8088 value, *REMOTE_ERRNO to the remote error number or zero if none
8089 was included, and *ATTACHMENT to point to the start of the annex
8090 if any. The length of the packet isn't needed here; there may
8091 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8093 Return 0 if the packet could be parsed, -1 if it could not. If
8094 -1 is returned, the other variables may not be initialized. */
8097 remote_hostio_parse_result (char *buffer
, int *retcode
,
8098 int *remote_errno
, char **attachment
)
8105 if (buffer
[0] != 'F')
8109 *retcode
= strtol (&buffer
[1], &p
, 16);
8110 if (errno
!= 0 || p
== &buffer
[1])
8113 /* Check for ",errno". */
8117 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8118 if (errno
!= 0 || p
+ 1 == p2
)
8123 /* Check for ";attachment". If there is no attachment, the
8124 packet should end here. */
8127 *attachment
= p
+ 1;
8130 else if (*p
== '\0')
8136 /* Send a prepared I/O packet to the target and read its response.
8137 The prepared packet is in the global RS->BUF before this function
8138 is called, and the answer is there when we return.
8140 COMMAND_BYTES is the length of the request to send, which may include
8141 binary data. WHICH_PACKET is the packet configuration to check
8142 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8143 is set to the error number and -1 is returned. Otherwise the value
8144 returned by the function is returned.
8146 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8147 attachment is expected; an error will be reported if there's a
8148 mismatch. If one is found, *ATTACHMENT will be set to point into
8149 the packet buffer and *ATTACHMENT_LEN will be set to the
8150 attachment's length. */
8153 remote_hostio_send_command (int command_bytes
, int which_packet
,
8154 int *remote_errno
, char **attachment
,
8155 int *attachment_len
)
8157 struct remote_state
*rs
= get_remote_state ();
8158 int ret
, bytes_read
;
8159 char *attachment_tmp
;
8162 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
8164 *remote_errno
= FILEIO_ENOSYS
;
8168 putpkt_binary (rs
->buf
, command_bytes
);
8169 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8171 /* If it timed out, something is wrong. Don't try to parse the
8175 *remote_errno
= FILEIO_EINVAL
;
8179 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
8182 *remote_errno
= FILEIO_EINVAL
;
8184 case PACKET_UNKNOWN
:
8185 *remote_errno
= FILEIO_ENOSYS
;
8191 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
8194 *remote_errno
= FILEIO_EINVAL
;
8198 /* Make sure we saw an attachment if and only if we expected one. */
8199 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
8200 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
8202 *remote_errno
= FILEIO_EINVAL
;
8206 /* If an attachment was found, it must point into the packet buffer;
8207 work out how many bytes there were. */
8208 if (attachment_tmp
!= NULL
)
8210 *attachment
= attachment_tmp
;
8211 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
8217 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8218 remote file descriptor, or -1 if an error occurs (and set
8222 remote_hostio_open (const char *filename
, int flags
, int mode
,
8225 struct remote_state
*rs
= get_remote_state ();
8227 int left
= get_remote_packet_size () - 1;
8229 remote_buffer_add_string (&p
, &left
, "vFile:open:");
8231 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8233 remote_buffer_add_string (&p
, &left
, ",");
8235 remote_buffer_add_int (&p
, &left
, flags
);
8236 remote_buffer_add_string (&p
, &left
, ",");
8238 remote_buffer_add_int (&p
, &left
, mode
);
8240 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
8241 remote_errno
, NULL
, NULL
);
8244 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8245 Return the number of bytes written, or -1 if an error occurs (and
8246 set *REMOTE_ERRNO). */
8249 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
8250 ULONGEST offset
, int *remote_errno
)
8252 struct remote_state
*rs
= get_remote_state ();
8254 int left
= get_remote_packet_size ();
8257 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
8259 remote_buffer_add_int (&p
, &left
, fd
);
8260 remote_buffer_add_string (&p
, &left
, ",");
8262 remote_buffer_add_int (&p
, &left
, offset
);
8263 remote_buffer_add_string (&p
, &left
, ",");
8265 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
8266 get_remote_packet_size () - (p
- rs
->buf
));
8268 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
8269 remote_errno
, NULL
, NULL
);
8272 /* Read up to LEN bytes FD on the remote target into READ_BUF
8273 Return the number of bytes read, or -1 if an error occurs (and
8274 set *REMOTE_ERRNO). */
8277 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
8278 ULONGEST offset
, int *remote_errno
)
8280 struct remote_state
*rs
= get_remote_state ();
8283 int left
= get_remote_packet_size ();
8284 int ret
, attachment_len
;
8287 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
8289 remote_buffer_add_int (&p
, &left
, fd
);
8290 remote_buffer_add_string (&p
, &left
, ",");
8292 remote_buffer_add_int (&p
, &left
, len
);
8293 remote_buffer_add_string (&p
, &left
, ",");
8295 remote_buffer_add_int (&p
, &left
, offset
);
8297 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
8298 remote_errno
, &attachment
,
8304 read_len
= remote_unescape_input (attachment
, attachment_len
,
8306 if (read_len
!= ret
)
8307 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
8312 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8313 (and set *REMOTE_ERRNO). */
8316 remote_hostio_close (int fd
, int *remote_errno
)
8318 struct remote_state
*rs
= get_remote_state ();
8320 int left
= get_remote_packet_size () - 1;
8322 remote_buffer_add_string (&p
, &left
, "vFile:close:");
8324 remote_buffer_add_int (&p
, &left
, fd
);
8326 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
8327 remote_errno
, NULL
, NULL
);
8330 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8331 occurs (and set *REMOTE_ERRNO). */
8334 remote_hostio_unlink (const char *filename
, int *remote_errno
)
8336 struct remote_state
*rs
= get_remote_state ();
8338 int left
= get_remote_packet_size () - 1;
8340 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
8342 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8345 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
8346 remote_errno
, NULL
, NULL
);
8350 remote_fileio_errno_to_host (int errnum
)
8374 case FILEIO_ENOTDIR
:
8394 case FILEIO_ENAMETOOLONG
:
8395 return ENAMETOOLONG
;
8401 remote_hostio_error (int errnum
)
8403 int host_error
= remote_fileio_errno_to_host (errnum
);
8405 if (host_error
== -1)
8406 error (_("Unknown remote I/O error %d"), errnum
);
8408 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
8412 remote_hostio_close_cleanup (void *opaque
)
8414 int fd
= *(int *) opaque
;
8417 remote_hostio_close (fd
, &remote_errno
);
8422 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
8424 const char *filename
= bfd_get_filename (abfd
);
8425 int fd
, remote_errno
;
8428 gdb_assert (remote_filename_p (filename
));
8430 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
8433 errno
= remote_fileio_errno_to_host (remote_errno
);
8434 bfd_set_error (bfd_error_system_call
);
8438 stream
= xmalloc (sizeof (int));
8444 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
8446 int fd
= *(int *)stream
;
8451 /* Ignore errors on close; these may happen if the remote
8452 connection was already torn down. */
8453 remote_hostio_close (fd
, &remote_errno
);
8459 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
8460 file_ptr nbytes
, file_ptr offset
)
8462 int fd
= *(int *)stream
;
8464 file_ptr pos
, bytes
;
8467 while (nbytes
> pos
)
8469 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
8470 offset
+ pos
, &remote_errno
);
8472 /* Success, but no bytes, means end-of-file. */
8476 errno
= remote_fileio_errno_to_host (remote_errno
);
8477 bfd_set_error (bfd_error_system_call
);
8488 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
8490 /* FIXME: We should probably implement remote_hostio_stat. */
8491 sb
->st_size
= INT_MAX
;
8496 remote_filename_p (const char *filename
)
8498 return strncmp (filename
, "remote:", 7) == 0;
8502 remote_bfd_open (const char *remote_file
, const char *target
)
8504 return bfd_openr_iovec (remote_file
, target
,
8505 remote_bfd_iovec_open
, NULL
,
8506 remote_bfd_iovec_pread
,
8507 remote_bfd_iovec_close
,
8508 remote_bfd_iovec_stat
);
8512 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
8514 struct cleanup
*back_to
, *close_cleanup
;
8515 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8518 int bytes_in_buffer
;
8523 error (_("command can only be used with remote target"));
8525 file
= fopen (local_file
, "rb");
8527 perror_with_name (local_file
);
8528 back_to
= make_cleanup_fclose (file
);
8530 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
8532 0700, &remote_errno
);
8534 remote_hostio_error (remote_errno
);
8536 /* Send up to this many bytes at once. They won't all fit in the
8537 remote packet limit, so we'll transfer slightly fewer. */
8538 io_size
= get_remote_packet_size ();
8539 buffer
= xmalloc (io_size
);
8540 make_cleanup (xfree
, buffer
);
8542 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8544 bytes_in_buffer
= 0;
8547 while (bytes_in_buffer
|| !saw_eof
)
8551 bytes
= fread (buffer
+ bytes_in_buffer
, 1, io_size
- bytes_in_buffer
,
8556 error (_("Error reading %s."), local_file
);
8559 /* EOF. Unless there is something still in the
8560 buffer from the last iteration, we are done. */
8562 if (bytes_in_buffer
== 0)
8570 bytes
+= bytes_in_buffer
;
8571 bytes_in_buffer
= 0;
8573 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
, offset
, &remote_errno
);
8576 remote_hostio_error (remote_errno
);
8577 else if (retcode
== 0)
8578 error (_("Remote write of %d bytes returned 0!"), bytes
);
8579 else if (retcode
< bytes
)
8581 /* Short write. Save the rest of the read data for the next
8583 bytes_in_buffer
= bytes
- retcode
;
8584 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
8590 discard_cleanups (close_cleanup
);
8591 if (remote_hostio_close (fd
, &remote_errno
))
8592 remote_hostio_error (remote_errno
);
8595 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
8596 do_cleanups (back_to
);
8600 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
8602 struct cleanup
*back_to
, *close_cleanup
;
8603 int fd
, remote_errno
, bytes
, io_size
;
8609 error (_("command can only be used with remote target"));
8611 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
8613 remote_hostio_error (remote_errno
);
8615 file
= fopen (local_file
, "wb");
8617 perror_with_name (local_file
);
8618 back_to
= make_cleanup_fclose (file
);
8620 /* Send up to this many bytes at once. They won't all fit in the
8621 remote packet limit, so we'll transfer slightly fewer. */
8622 io_size
= get_remote_packet_size ();
8623 buffer
= xmalloc (io_size
);
8624 make_cleanup (xfree
, buffer
);
8626 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8631 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
8633 /* Success, but no bytes, means end-of-file. */
8636 remote_hostio_error (remote_errno
);
8640 bytes
= fwrite (buffer
, 1, bytes
, file
);
8642 perror_with_name (local_file
);
8645 discard_cleanups (close_cleanup
);
8646 if (remote_hostio_close (fd
, &remote_errno
))
8647 remote_hostio_error (remote_errno
);
8650 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
8651 do_cleanups (back_to
);
8655 remote_file_delete (const char *remote_file
, int from_tty
)
8657 int retcode
, remote_errno
;
8660 error (_("command can only be used with remote target"));
8662 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
8664 remote_hostio_error (remote_errno
);
8667 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
8671 remote_put_command (char *args
, int from_tty
)
8673 struct cleanup
*back_to
;
8677 error_no_arg (_("file to put"));
8679 argv
= gdb_buildargv (args
);
8680 back_to
= make_cleanup_freeargv (argv
);
8681 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8682 error (_("Invalid parameters to remote put"));
8684 remote_file_put (argv
[0], argv
[1], from_tty
);
8686 do_cleanups (back_to
);
8690 remote_get_command (char *args
, int from_tty
)
8692 struct cleanup
*back_to
;
8696 error_no_arg (_("file to get"));
8698 argv
= gdb_buildargv (args
);
8699 back_to
= make_cleanup_freeargv (argv
);
8700 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8701 error (_("Invalid parameters to remote get"));
8703 remote_file_get (argv
[0], argv
[1], from_tty
);
8705 do_cleanups (back_to
);
8709 remote_delete_command (char *args
, int from_tty
)
8711 struct cleanup
*back_to
;
8715 error_no_arg (_("file to delete"));
8717 argv
= gdb_buildargv (args
);
8718 back_to
= make_cleanup_freeargv (argv
);
8719 if (argv
[0] == NULL
|| argv
[1] != NULL
)
8720 error (_("Invalid parameters to remote delete"));
8722 remote_file_delete (argv
[0], from_tty
);
8724 do_cleanups (back_to
);
8728 remote_command (char *args
, int from_tty
)
8730 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
8733 static int remote_target_can_reverse
= 1;
8736 remote_can_execute_reverse (void)
8738 return remote_target_can_reverse
;
8742 remote_supports_non_stop (void)
8748 remote_supports_multi_process (void)
8750 struct remote_state
*rs
= get_remote_state ();
8751 return remote_multi_process_p (rs
);
8755 remote_supports_cond_tracepoints (void)
8757 struct remote_state
*rs
= get_remote_state ();
8758 return rs
->cond_tracepoints
;
8762 init_remote_ops (void)
8764 remote_ops
.to_shortname
= "remote";
8765 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
8767 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8768 Specify the serial device it is connected to\n\
8769 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
8770 remote_ops
.to_open
= remote_open
;
8771 remote_ops
.to_close
= remote_close
;
8772 remote_ops
.to_detach
= remote_detach
;
8773 remote_ops
.to_disconnect
= remote_disconnect
;
8774 remote_ops
.to_resume
= remote_resume
;
8775 remote_ops
.to_wait
= remote_wait
;
8776 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
8777 remote_ops
.to_store_registers
= remote_store_registers
;
8778 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
8779 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
8780 remote_ops
.to_files_info
= remote_files_info
;
8781 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
8782 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
8783 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
8784 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
8785 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
8786 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
8787 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
8788 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
8789 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
8790 remote_ops
.to_kill
= remote_kill
;
8791 remote_ops
.to_load
= generic_load
;
8792 remote_ops
.to_mourn_inferior
= remote_mourn
;
8793 remote_ops
.to_thread_alive
= remote_thread_alive
;
8794 remote_ops
.to_find_new_threads
= remote_threads_info
;
8795 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
8796 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
8797 remote_ops
.to_stop
= remote_stop
;
8798 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
8799 remote_ops
.to_rcmd
= remote_rcmd
;
8800 remote_ops
.to_log_command
= serial_log_command
;
8801 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
8802 remote_ops
.to_stratum
= process_stratum
;
8803 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
8804 remote_ops
.to_has_memory
= default_child_has_memory
;
8805 remote_ops
.to_has_stack
= default_child_has_stack
;
8806 remote_ops
.to_has_registers
= default_child_has_registers
;
8807 remote_ops
.to_has_execution
= default_child_has_execution
;
8808 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
8809 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
8810 remote_ops
.to_magic
= OPS_MAGIC
;
8811 remote_ops
.to_memory_map
= remote_memory_map
;
8812 remote_ops
.to_flash_erase
= remote_flash_erase
;
8813 remote_ops
.to_flash_done
= remote_flash_done
;
8814 remote_ops
.to_read_description
= remote_read_description
;
8815 remote_ops
.to_search_memory
= remote_search_memory
;
8816 remote_ops
.to_can_async_p
= remote_can_async_p
;
8817 remote_ops
.to_is_async_p
= remote_is_async_p
;
8818 remote_ops
.to_async
= remote_async
;
8819 remote_ops
.to_async_mask
= remote_async_mask
;
8820 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
8821 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
8822 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
8823 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
8826 /* Set up the extended remote vector by making a copy of the standard
8827 remote vector and adding to it. */
8830 init_extended_remote_ops (void)
8832 extended_remote_ops
= remote_ops
;
8834 extended_remote_ops
.to_shortname
= "extended-remote";
8835 extended_remote_ops
.to_longname
=
8836 "Extended remote serial target in gdb-specific protocol";
8837 extended_remote_ops
.to_doc
=
8838 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8839 Specify the serial device it is connected to (e.g. /dev/ttya).";
8840 extended_remote_ops
.to_open
= extended_remote_open
;
8841 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
8842 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
8843 extended_remote_ops
.to_detach
= extended_remote_detach
;
8844 extended_remote_ops
.to_attach
= extended_remote_attach
;
8845 extended_remote_ops
.to_kill
= extended_remote_kill
;
8849 remote_can_async_p (void)
8851 if (!target_async_permitted
)
8852 /* We only enable async when the user specifically asks for it. */
8855 /* We're async whenever the serial device is. */
8856 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
8860 remote_is_async_p (void)
8862 if (!target_async_permitted
)
8863 /* We only enable async when the user specifically asks for it. */
8866 /* We're async whenever the serial device is. */
8867 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
8870 /* Pass the SERIAL event on and up to the client. One day this code
8871 will be able to delay notifying the client of an event until the
8872 point where an entire packet has been received. */
8874 static void (*async_client_callback
) (enum inferior_event_type event_type
,
8876 static void *async_client_context
;
8877 static serial_event_ftype remote_async_serial_handler
;
8880 remote_async_serial_handler (struct serial
*scb
, void *context
)
8882 /* Don't propogate error information up to the client. Instead let
8883 the client find out about the error by querying the target. */
8884 async_client_callback (INF_REG_EVENT
, async_client_context
);
8888 remote_async_inferior_event_handler (gdb_client_data data
)
8890 inferior_event_handler (INF_REG_EVENT
, NULL
);
8894 remote_async_get_pending_events_handler (gdb_client_data data
)
8896 remote_get_pending_stop_replies ();
8900 remote_async (void (*callback
) (enum inferior_event_type event_type
,
8901 void *context
), void *context
)
8903 if (remote_async_mask_value
== 0)
8904 internal_error (__FILE__
, __LINE__
,
8905 _("Calling remote_async when async is masked"));
8907 if (callback
!= NULL
)
8909 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
8910 async_client_callback
= callback
;
8911 async_client_context
= context
;
8914 serial_async (remote_desc
, NULL
, NULL
);
8918 remote_async_mask (int new_mask
)
8920 int curr_mask
= remote_async_mask_value
;
8921 remote_async_mask_value
= new_mask
;
8926 set_remote_cmd (char *args
, int from_tty
)
8928 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
8932 show_remote_cmd (char *args
, int from_tty
)
8934 /* We can't just use cmd_show_list here, because we want to skip
8935 the redundant "show remote Z-packet" and the legacy aliases. */
8936 struct cleanup
*showlist_chain
;
8937 struct cmd_list_element
*list
= remote_show_cmdlist
;
8939 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
8940 for (; list
!= NULL
; list
= list
->next
)
8941 if (strcmp (list
->name
, "Z-packet") == 0)
8943 else if (list
->type
== not_set_cmd
)
8944 /* Alias commands are exactly like the original, except they
8945 don't have the normal type. */
8949 struct cleanup
*option_chain
8950 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
8951 ui_out_field_string (uiout
, "name", list
->name
);
8952 ui_out_text (uiout
, ": ");
8953 if (list
->type
== show_cmd
)
8954 do_setshow_command ((char *) NULL
, from_tty
, list
);
8956 cmd_func (list
, NULL
, from_tty
);
8957 /* Close the tuple. */
8958 do_cleanups (option_chain
);
8961 /* Close the tuple. */
8962 do_cleanups (showlist_chain
);
8966 /* Function to be called whenever a new objfile (shlib) is detected. */
8968 remote_new_objfile (struct objfile
*objfile
)
8970 if (remote_desc
!= 0) /* Have a remote connection. */
8971 remote_check_symbols (objfile
);
8975 _initialize_remote (void)
8977 struct remote_state
*rs
;
8979 /* architecture specific data */
8980 remote_gdbarch_data_handle
=
8981 gdbarch_data_register_post_init (init_remote_state
);
8982 remote_g_packet_data_handle
=
8983 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
8985 /* Initialize the per-target state. At the moment there is only one
8986 of these, not one per target. Only one target is active at a
8987 time. The default buffer size is unimportant; it will be expanded
8988 whenever a larger buffer is needed. */
8989 rs
= get_remote_state_raw ();
8991 rs
->buf
= xmalloc (rs
->buf_size
);
8994 add_target (&remote_ops
);
8996 init_extended_remote_ops ();
8997 add_target (&extended_remote_ops
);
8999 /* Hook into new objfile notification. */
9000 observer_attach_new_objfile (remote_new_objfile
);
9002 /* Set up signal handlers. */
9003 sigint_remote_token
=
9004 create_async_signal_handler (async_remote_interrupt
, NULL
);
9005 sigint_remote_twice_token
=
9006 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
9009 init_remote_threadtests ();
9012 /* set/show remote ... */
9014 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
9015 Remote protocol specific variables\n\
9016 Configure various remote-protocol specific variables such as\n\
9017 the packets being used"),
9018 &remote_set_cmdlist
, "set remote ",
9019 0 /* allow-unknown */, &setlist
);
9020 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
9021 Remote protocol specific variables\n\
9022 Configure various remote-protocol specific variables such as\n\
9023 the packets being used"),
9024 &remote_show_cmdlist
, "show remote ",
9025 0 /* allow-unknown */, &showlist
);
9027 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
9028 Compare section data on target to the exec file.\n\
9029 Argument is a single section name (default: all loaded sections)."),
9032 add_cmd ("packet", class_maintenance
, packet_command
, _("\
9033 Send an arbitrary packet to a remote target.\n\
9034 maintenance packet TEXT\n\
9035 If GDB is talking to an inferior via the GDB serial protocol, then\n\
9036 this command sends the string TEXT to the inferior, and displays the\n\
9037 response packet. GDB supplies the initial `$' character, and the\n\
9038 terminating `#' character and checksum."),
9041 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
9042 Set whether to send break if interrupted."), _("\
9043 Show whether to send break if interrupted."), _("\
9044 If set, a break, instead of a cntrl-c, is sent to the remote target."),
9045 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
9046 &setlist
, &showlist
);
9048 /* Install commands for configuring memory read/write packets. */
9050 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
9051 Set the maximum number of bytes per memory write packet (deprecated)."),
9053 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
9054 Show the maximum number of bytes per memory write packet (deprecated)."),
9056 add_cmd ("memory-write-packet-size", no_class
,
9057 set_memory_write_packet_size
, _("\
9058 Set the maximum number of bytes per memory-write packet.\n\
9059 Specify the number of bytes in a packet or 0 (zero) for the\n\
9060 default packet size. The actual limit is further reduced\n\
9061 dependent on the target. Specify ``fixed'' to disable the\n\
9062 further restriction and ``limit'' to enable that restriction."),
9063 &remote_set_cmdlist
);
9064 add_cmd ("memory-read-packet-size", no_class
,
9065 set_memory_read_packet_size
, _("\
9066 Set the maximum number of bytes per memory-read packet.\n\
9067 Specify the number of bytes in a packet or 0 (zero) for the\n\
9068 default packet size. The actual limit is further reduced\n\
9069 dependent on the target. Specify ``fixed'' to disable the\n\
9070 further restriction and ``limit'' to enable that restriction."),
9071 &remote_set_cmdlist
);
9072 add_cmd ("memory-write-packet-size", no_class
,
9073 show_memory_write_packet_size
,
9074 _("Show the maximum number of bytes per memory-write packet."),
9075 &remote_show_cmdlist
);
9076 add_cmd ("memory-read-packet-size", no_class
,
9077 show_memory_read_packet_size
,
9078 _("Show the maximum number of bytes per memory-read packet."),
9079 &remote_show_cmdlist
);
9081 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
9082 &remote_hw_watchpoint_limit
, _("\
9083 Set the maximum number of target hardware watchpoints."), _("\
9084 Show the maximum number of target hardware watchpoints."), _("\
9085 Specify a negative limit for unlimited."),
9086 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
9087 &remote_set_cmdlist
, &remote_show_cmdlist
);
9088 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
9089 &remote_hw_breakpoint_limit
, _("\
9090 Set the maximum number of target hardware breakpoints."), _("\
9091 Show the maximum number of target hardware breakpoints."), _("\
9092 Specify a negative limit for unlimited."),
9093 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
9094 &remote_set_cmdlist
, &remote_show_cmdlist
);
9096 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
9097 &remote_address_size
, _("\
9098 Set the maximum size of the address (in bits) in a memory packet."), _("\
9099 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
9101 NULL
, /* FIXME: i18n: */
9102 &setlist
, &showlist
);
9104 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
9105 "X", "binary-download", 1);
9107 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
9108 "vCont", "verbose-resume", 0);
9110 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
9111 "QPassSignals", "pass-signals", 0);
9113 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
9114 "qSymbol", "symbol-lookup", 0);
9116 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
9117 "P", "set-register", 1);
9119 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
9120 "p", "fetch-register", 1);
9122 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
9123 "Z0", "software-breakpoint", 0);
9125 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
9126 "Z1", "hardware-breakpoint", 0);
9128 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
9129 "Z2", "write-watchpoint", 0);
9131 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
9132 "Z3", "read-watchpoint", 0);
9134 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
9135 "Z4", "access-watchpoint", 0);
9137 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
9138 "qXfer:auxv:read", "read-aux-vector", 0);
9140 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
9141 "qXfer:features:read", "target-features", 0);
9143 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
9144 "qXfer:libraries:read", "library-info", 0);
9146 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
9147 "qXfer:memory-map:read", "memory-map", 0);
9149 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
9150 "qXfer:spu:read", "read-spu-object", 0);
9152 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
9153 "qXfer:spu:write", "write-spu-object", 0);
9155 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
9156 "qXfer:osdata:read", "osdata", 0);
9158 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
9159 "qXfer:siginfo:read", "read-siginfo-object", 0);
9161 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
9162 "qXfer:siginfo:write", "write-siginfo-object", 0);
9164 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
9165 "qGetTLSAddr", "get-thread-local-storage-address",
9168 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
9169 "qSupported", "supported-packets", 0);
9171 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
9172 "qSearch:memory", "search-memory", 0);
9174 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
9175 "vFile:open", "hostio-open", 0);
9177 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
9178 "vFile:pread", "hostio-pread", 0);
9180 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
9181 "vFile:pwrite", "hostio-pwrite", 0);
9183 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
9184 "vFile:close", "hostio-close", 0);
9186 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
9187 "vFile:unlink", "hostio-unlink", 0);
9189 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
9190 "vAttach", "attach", 0);
9192 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
9195 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
9196 "QStartNoAckMode", "noack", 0);
9198 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
9199 "vKill", "kill", 0);
9201 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
9202 "qAttached", "query-attached", 0);
9204 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
9205 "ConditionalTracepoints", "conditional-tracepoints", 0);
9207 /* Keep the old ``set remote Z-packet ...'' working. Each individual
9208 Z sub-packet has its own set and show commands, but users may
9209 have sets to this variable in their .gdbinit files (or in their
9211 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
9212 &remote_Z_packet_detect
, _("\
9213 Set use of remote protocol `Z' packets"), _("\
9214 Show use of remote protocol `Z' packets "), _("\
9215 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
9217 set_remote_protocol_Z_packet_cmd
,
9218 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
9219 &remote_set_cmdlist
, &remote_show_cmdlist
);
9221 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
9222 Manipulate files on the remote system\n\
9223 Transfer files to and from the remote target system."),
9224 &remote_cmdlist
, "remote ",
9225 0 /* allow-unknown */, &cmdlist
);
9227 add_cmd ("put", class_files
, remote_put_command
,
9228 _("Copy a local file to the remote system."),
9231 add_cmd ("get", class_files
, remote_get_command
,
9232 _("Copy a remote file to the local system."),
9235 add_cmd ("delete", class_files
, remote_delete_command
,
9236 _("Delete a remote file."),
9239 remote_exec_file
= xstrdup ("");
9240 add_setshow_string_noescape_cmd ("exec-file", class_files
,
9241 &remote_exec_file
, _("\
9242 Set the remote pathname for \"run\""), _("\
9243 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
9244 &remote_set_cmdlist
, &remote_show_cmdlist
);
9246 /* Eventually initialize fileio. See fileio.c */
9247 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
9249 /* Take advantage of the fact that the LWP field is not used, to tag
9250 special ptids with it set to != 0. */
9251 magic_null_ptid
= ptid_build (42000, 1, -1);
9252 not_sent_ptid
= ptid_build (42000, 1, -2);
9253 any_thread_ptid
= ptid_build (42000, 1, 0);