1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
25 #include "gdb_string.h"
31 #include "exceptions.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
41 #include "gdb_assert.h"
44 #include "cli/cli-decode.h"
45 #include "cli/cli-setshow.h"
46 #include "target-descriptions.h"
51 #include "event-loop.h"
52 #include "event-top.h"
58 #include "gdbcore.h" /* for exec_bfd */
60 #include "remote-fileio.h"
61 #include "gdb/fileio.h"
64 #include "memory-map.h"
66 /* The size to align memory write packets, when practical. The protocol
67 does not guarantee any alignment, and gdb will generate short
68 writes and unaligned writes, but even as a best-effort attempt this
69 can improve bulk transfers. For instance, if a write is misaligned
70 relative to the target's data bus, the stub may need to make an extra
71 round trip fetching data from the target. This doesn't make a
72 huge difference, but it's easy to do, so we try to be helpful.
74 The alignment chosen is arbitrary; usually data bus width is
75 important here, not the possibly larger cache line size. */
76 enum { REMOTE_ALIGN_WRITES
= 16 };
78 /* Prototypes for local functions. */
79 static void cleanup_sigint_signal_handler (void *dummy
);
80 static void initialize_sigint_signal_handler (void);
81 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
82 static int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
,
85 static void handle_remote_sigint (int);
86 static void handle_remote_sigint_twice (int);
87 static void async_remote_interrupt (gdb_client_data
);
88 void async_remote_interrupt_twice (gdb_client_data
);
90 static void remote_files_info (struct target_ops
*ignore
);
92 static void remote_prepare_to_store (struct regcache
*regcache
);
94 static void remote_open (char *name
, int from_tty
);
96 static void extended_remote_open (char *name
, int from_tty
);
98 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
);
100 static void remote_close (int quitting
);
102 static void remote_mourn (struct target_ops
*ops
);
104 static void extended_remote_restart (void);
106 static void extended_remote_mourn (struct target_ops
*);
108 static void remote_mourn_1 (struct target_ops
*);
110 static void remote_send (char **buf
, long *sizeof_buf_p
);
112 static int readchar (int timeout
);
114 static void remote_kill (struct target_ops
*ops
);
116 static int tohex (int nib
);
118 static int remote_can_async_p (void);
120 static int remote_is_async_p (void);
122 static void remote_async (void (*callback
) (enum inferior_event_type event_type
,
123 void *context
), void *context
);
125 static int remote_async_mask (int new_mask
);
127 static void remote_detach (struct target_ops
*ops
, char *args
, int from_tty
);
129 static void remote_interrupt (int signo
);
131 static void remote_interrupt_twice (int signo
);
133 static void interrupt_query (void);
135 static void set_general_thread (struct ptid ptid
);
136 static void set_continue_thread (struct ptid ptid
);
138 static void get_offsets (void);
140 static void skip_frame (void);
142 static long read_frame (char **buf_p
, long *sizeof_buf
);
144 static int hexnumlen (ULONGEST num
);
146 static void init_remote_ops (void);
148 static void init_extended_remote_ops (void);
150 static void remote_stop (ptid_t
);
152 static int ishex (int ch
, int *val
);
154 static int stubhex (int ch
);
156 static int hexnumstr (char *, ULONGEST
);
158 static int hexnumnstr (char *, ULONGEST
, int);
160 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
162 static void print_packet (char *);
164 static unsigned long crc32 (unsigned char *, int, unsigned int);
166 static void compare_sections_command (char *, int);
168 static void packet_command (char *, int);
170 static int stub_unpack_int (char *buff
, int fieldlength
);
172 static ptid_t
remote_current_thread (ptid_t oldptid
);
174 static void remote_find_new_threads (void);
176 static void record_currthread (ptid_t currthread
);
178 static int fromhex (int a
);
180 static int hex2bin (const char *hex
, gdb_byte
*bin
, int count
);
182 static int bin2hex (const gdb_byte
*bin
, char *hex
, int count
);
184 static int putpkt_binary (char *buf
, int cnt
);
186 static void check_binary_download (CORE_ADDR addr
);
188 struct packet_config
;
190 static void show_packet_config_cmd (struct packet_config
*config
);
192 static void update_packet_config (struct packet_config
*config
);
194 static void set_remote_protocol_packet_cmd (char *args
, int from_tty
,
195 struct cmd_list_element
*c
);
197 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
199 struct cmd_list_element
*c
,
202 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
203 static ptid_t
read_ptid (char *buf
, char **obuf
);
205 static void remote_query_supported (void);
207 static void remote_check_symbols (struct objfile
*objfile
);
209 void _initialize_remote (void);
212 static struct stop_reply
*stop_reply_xmalloc (void);
213 static void stop_reply_xfree (struct stop_reply
*);
214 static void do_stop_reply_xfree (void *arg
);
215 static void remote_parse_stop_reply (char *buf
, struct stop_reply
*);
216 static void push_stop_reply (struct stop_reply
*);
217 static void remote_get_pending_stop_replies (void);
218 static void discard_pending_stop_replies (int pid
);
219 static int peek_stop_reply (ptid_t ptid
);
221 static void remote_async_inferior_event_handler (gdb_client_data
);
222 static void remote_async_get_pending_events_handler (gdb_client_data
);
224 static void remote_terminal_ours (void);
226 static int remote_read_description_p (struct target_ops
*target
);
228 /* The non-stop remote protocol provisions for one pending stop reply.
229 This is where we keep it until it is acknowledged. */
231 static struct stop_reply
*pending_stop_reply
= NULL
;
235 static struct cmd_list_element
*remote_cmdlist
;
237 /* For "set remote" and "show remote". */
239 static struct cmd_list_element
*remote_set_cmdlist
;
240 static struct cmd_list_element
*remote_show_cmdlist
;
242 /* Description of the remote protocol state for the currently
243 connected target. This is per-target state, and independent of the
244 selected architecture. */
248 /* A buffer to use for incoming packets, and its current size. The
249 buffer is grown dynamically for larger incoming packets.
250 Outgoing packets may also be constructed in this buffer.
251 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
252 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
257 /* If we negotiated packet size explicitly (and thus can bypass
258 heuristics for the largest packet size that will not overflow
259 a buffer in the stub), this will be set to that packet size.
260 Otherwise zero, meaning to use the guessed size. */
261 long explicit_packet_size
;
263 /* remote_wait is normally called when the target is running and
264 waits for a stop reply packet. But sometimes we need to call it
265 when the target is already stopped. We can send a "?" packet
266 and have remote_wait read the response. Or, if we already have
267 the response, we can stash it in BUF and tell remote_wait to
268 skip calling getpkt. This flag is set when BUF contains a
269 stop reply packet and the target is not waiting. */
270 int cached_wait_status
;
272 /* True, if in no ack mode. That is, neither GDB nor the stub will
273 expect acks from each other. The connection is assumed to be
277 /* True if we're connected in extended remote mode. */
280 /* True if the stub reported support for multi-process
282 int multi_process_aware
;
284 /* True if we resumed the target and we're waiting for the target to
285 stop. In the mean time, we can't start another command/query.
286 The remote server wouldn't be ready to process it, so we'd
287 timeout waiting for a reply that would never come and eventually
288 we'd close the connection. This can happen in asynchronous mode
289 because we allow GDB commands while the target is running. */
290 int waiting_for_stop_reply
;
292 /* True if the stub reports support for non-stop mode. */
295 /* True if the stub reports support for vCont;t. */
298 /* True if the stub reports support for conditional tracepoints. */
299 int cond_tracepoints
;
302 /* Returns true if the multi-process extensions are in effect. */
304 remote_multi_process_p (struct remote_state
*rs
)
306 return rs
->extended
&& rs
->multi_process_aware
;
309 /* This data could be associated with a target, but we do not always
310 have access to the current target when we need it, so for now it is
311 static. This will be fine for as long as only one target is in use
313 static struct remote_state remote_state
;
315 static struct remote_state
*
316 get_remote_state_raw (void)
318 return &remote_state
;
321 /* Description of the remote protocol for a given architecture. */
325 long offset
; /* Offset into G packet. */
326 long regnum
; /* GDB's internal register number. */
327 LONGEST pnum
; /* Remote protocol register number. */
328 int in_g_packet
; /* Always part of G packet. */
329 /* long size in bytes; == register_size (target_gdbarch, regnum);
331 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
335 struct remote_arch_state
337 /* Description of the remote protocol registers. */
338 long sizeof_g_packet
;
340 /* Description of the remote protocol registers indexed by REGNUM
341 (making an array gdbarch_num_regs in size). */
342 struct packet_reg
*regs
;
344 /* This is the size (in chars) of the first response to the ``g''
345 packet. It is used as a heuristic when determining the maximum
346 size of memory-read and memory-write packets. A target will
347 typically only reserve a buffer large enough to hold the ``g''
348 packet. The size does not include packet overhead (headers and
350 long actual_register_packet_size
;
352 /* This is the maximum size (in chars) of a non read/write packet.
353 It is also used as a cap on the size of read/write packets. */
354 long remote_packet_size
;
358 /* Handle for retreving the remote protocol data from gdbarch. */
359 static struct gdbarch_data
*remote_gdbarch_data_handle
;
361 static struct remote_arch_state
*
362 get_remote_arch_state (void)
364 return gdbarch_data (target_gdbarch
, remote_gdbarch_data_handle
);
367 /* Fetch the global remote target state. */
369 static struct remote_state
*
370 get_remote_state (void)
372 /* Make sure that the remote architecture state has been
373 initialized, because doing so might reallocate rs->buf. Any
374 function which calls getpkt also needs to be mindful of changes
375 to rs->buf, but this call limits the number of places which run
377 get_remote_arch_state ();
379 return get_remote_state_raw ();
383 compare_pnums (const void *lhs_
, const void *rhs_
)
385 const struct packet_reg
* const *lhs
= lhs_
;
386 const struct packet_reg
* const *rhs
= rhs_
;
388 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
390 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
397 init_remote_state (struct gdbarch
*gdbarch
)
399 int regnum
, num_remote_regs
, offset
;
400 struct remote_state
*rs
= get_remote_state_raw ();
401 struct remote_arch_state
*rsa
;
402 struct packet_reg
**remote_regs
;
404 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
406 /* Use the architecture to build a regnum<->pnum table, which will be
407 1:1 unless a feature set specifies otherwise. */
408 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
409 gdbarch_num_regs (gdbarch
),
411 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
413 struct packet_reg
*r
= &rsa
->regs
[regnum
];
415 if (register_size (gdbarch
, regnum
) == 0)
416 /* Do not try to fetch zero-sized (placeholder) registers. */
419 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
424 /* Define the g/G packet format as the contents of each register
425 with a remote protocol number, in order of ascending protocol
428 remote_regs
= alloca (gdbarch_num_regs (gdbarch
)
429 * sizeof (struct packet_reg
*));
430 for (num_remote_regs
= 0, regnum
= 0;
431 regnum
< gdbarch_num_regs (gdbarch
);
433 if (rsa
->regs
[regnum
].pnum
!= -1)
434 remote_regs
[num_remote_regs
++] = &rsa
->regs
[regnum
];
436 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
439 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
441 remote_regs
[regnum
]->in_g_packet
= 1;
442 remote_regs
[regnum
]->offset
= offset
;
443 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
446 /* Record the maximum possible size of the g packet - it may turn out
448 rsa
->sizeof_g_packet
= offset
;
450 /* Default maximum number of characters in a packet body. Many
451 remote stubs have a hardwired buffer size of 400 bytes
452 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
453 as the maximum packet-size to ensure that the packet and an extra
454 NUL character can always fit in the buffer. This stops GDB
455 trashing stubs that try to squeeze an extra NUL into what is
456 already a full buffer (As of 1999-12-04 that was most stubs). */
457 rsa
->remote_packet_size
= 400 - 1;
459 /* This one is filled in when a ``g'' packet is received. */
460 rsa
->actual_register_packet_size
= 0;
462 /* Should rsa->sizeof_g_packet needs more space than the
463 default, adjust the size accordingly. Remember that each byte is
464 encoded as two characters. 32 is the overhead for the packet
465 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
466 (``$NN:G...#NN'') is a better guess, the below has been padded a
468 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
469 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
471 /* Make sure that the packet buffer is plenty big enough for
472 this architecture. */
473 if (rs
->buf_size
< rsa
->remote_packet_size
)
475 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
476 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
482 /* Return the current allowed size of a remote packet. This is
483 inferred from the current architecture, and should be used to
484 limit the length of outgoing packets. */
486 get_remote_packet_size (void)
488 struct remote_state
*rs
= get_remote_state ();
489 struct remote_arch_state
*rsa
= get_remote_arch_state ();
491 if (rs
->explicit_packet_size
)
492 return rs
->explicit_packet_size
;
494 return rsa
->remote_packet_size
;
497 static struct packet_reg
*
498 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
500 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch
))
504 struct packet_reg
*r
= &rsa
->regs
[regnum
];
505 gdb_assert (r
->regnum
== regnum
);
510 static struct packet_reg
*
511 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
514 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch
); i
++)
516 struct packet_reg
*r
= &rsa
->regs
[i
];
523 /* FIXME: graces/2002-08-08: These variables should eventually be
524 bound to an instance of the target object (as in gdbarch-tdep()),
525 when such a thing exists. */
527 /* This is set to the data address of the access causing the target
528 to stop for a watchpoint. */
529 static CORE_ADDR remote_watch_data_address
;
531 /* This is non-zero if target stopped for a watchpoint. */
532 static int remote_stopped_by_watchpoint_p
;
534 static struct target_ops remote_ops
;
536 static struct target_ops extended_remote_ops
;
538 static int remote_async_mask_value
= 1;
540 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
541 ``forever'' still use the normal timeout mechanism. This is
542 currently used by the ASYNC code to guarentee that target reads
543 during the initial connect always time-out. Once getpkt has been
544 modified to return a timeout indication and, in turn
545 remote_wait()/wait_for_inferior() have gained a timeout parameter
547 static int wait_forever_enabled_p
= 1;
550 /* This variable chooses whether to send a ^C or a break when the user
551 requests program interruption. Although ^C is usually what remote
552 systems expect, and that is the default here, sometimes a break is
553 preferable instead. */
555 static int remote_break
;
557 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
558 remote_open knows that we don't have a file open when the program
560 static struct serial
*remote_desc
= NULL
;
562 /* This variable sets the number of bits in an address that are to be
563 sent in a memory ("M" or "m") packet. Normally, after stripping
564 leading zeros, the entire address would be sent. This variable
565 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
566 initial implementation of remote.c restricted the address sent in
567 memory packets to ``host::sizeof long'' bytes - (typically 32
568 bits). Consequently, for 64 bit targets, the upper 32 bits of an
569 address was never sent. Since fixing this bug may cause a break in
570 some remote targets this variable is principly provided to
571 facilitate backward compatibility. */
573 static int remote_address_size
;
575 /* Temporary to track who currently owns the terminal. See
576 remote_terminal_* for more details. */
578 static int remote_async_terminal_ours_p
;
580 /* The executable file to use for "run" on the remote side. */
582 static char *remote_exec_file
= "";
585 /* User configurable variables for the number of characters in a
586 memory read/write packet. MIN (rsa->remote_packet_size,
587 rsa->sizeof_g_packet) is the default. Some targets need smaller
588 values (fifo overruns, et.al.) and some users need larger values
589 (speed up transfers). The variables ``preferred_*'' (the user
590 request), ``current_*'' (what was actually set) and ``forced_*''
591 (Positive - a soft limit, negative - a hard limit). */
593 struct memory_packet_config
600 /* Compute the current size of a read/write packet. Since this makes
601 use of ``actual_register_packet_size'' the computation is dynamic. */
604 get_memory_packet_size (struct memory_packet_config
*config
)
606 struct remote_state
*rs
= get_remote_state ();
607 struct remote_arch_state
*rsa
= get_remote_arch_state ();
609 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
610 law?) that some hosts don't cope very well with large alloca()
611 calls. Eventually the alloca() code will be replaced by calls to
612 xmalloc() and make_cleanups() allowing this restriction to either
613 be lifted or removed. */
614 #ifndef MAX_REMOTE_PACKET_SIZE
615 #define MAX_REMOTE_PACKET_SIZE 16384
617 /* NOTE: 20 ensures we can write at least one byte. */
618 #ifndef MIN_REMOTE_PACKET_SIZE
619 #define MIN_REMOTE_PACKET_SIZE 20
624 if (config
->size
<= 0)
625 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
627 what_they_get
= config
->size
;
631 what_they_get
= get_remote_packet_size ();
632 /* Limit the packet to the size specified by the user. */
634 && what_they_get
> config
->size
)
635 what_they_get
= config
->size
;
637 /* Limit it to the size of the targets ``g'' response unless we have
638 permission from the stub to use a larger packet size. */
639 if (rs
->explicit_packet_size
== 0
640 && rsa
->actual_register_packet_size
> 0
641 && what_they_get
> rsa
->actual_register_packet_size
)
642 what_they_get
= rsa
->actual_register_packet_size
;
644 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
645 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
646 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
647 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
649 /* Make sure there is room in the global buffer for this packet
650 (including its trailing NUL byte). */
651 if (rs
->buf_size
< what_they_get
+ 1)
653 rs
->buf_size
= 2 * what_they_get
;
654 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
657 return what_they_get
;
660 /* Update the size of a read/write packet. If they user wants
661 something really big then do a sanity check. */
664 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
666 int fixed_p
= config
->fixed_p
;
667 long size
= config
->size
;
669 error (_("Argument required (integer, `fixed' or `limited')."));
670 else if (strcmp (args
, "hard") == 0
671 || strcmp (args
, "fixed") == 0)
673 else if (strcmp (args
, "soft") == 0
674 || strcmp (args
, "limit") == 0)
679 size
= strtoul (args
, &end
, 0);
681 error (_("Invalid %s (bad syntax)."), config
->name
);
683 /* Instead of explicitly capping the size of a packet to
684 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
685 instead allowed to set the size to something arbitrarily
687 if (size
> MAX_REMOTE_PACKET_SIZE
)
688 error (_("Invalid %s (too large)."), config
->name
);
692 if (fixed_p
&& !config
->fixed_p
)
694 if (! query (_("The target may not be able to correctly handle a %s\n"
695 "of %ld bytes. Change the packet size? "),
697 error (_("Packet size not changed."));
699 /* Update the config. */
700 config
->fixed_p
= fixed_p
;
705 show_memory_packet_size (struct memory_packet_config
*config
)
707 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
709 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
710 get_memory_packet_size (config
));
712 printf_filtered (_("Packets are limited to %ld bytes.\n"),
713 get_memory_packet_size (config
));
716 static struct memory_packet_config memory_write_packet_config
=
718 "memory-write-packet-size",
722 set_memory_write_packet_size (char *args
, int from_tty
)
724 set_memory_packet_size (args
, &memory_write_packet_config
);
728 show_memory_write_packet_size (char *args
, int from_tty
)
730 show_memory_packet_size (&memory_write_packet_config
);
734 get_memory_write_packet_size (void)
736 return get_memory_packet_size (&memory_write_packet_config
);
739 static struct memory_packet_config memory_read_packet_config
=
741 "memory-read-packet-size",
745 set_memory_read_packet_size (char *args
, int from_tty
)
747 set_memory_packet_size (args
, &memory_read_packet_config
);
751 show_memory_read_packet_size (char *args
, int from_tty
)
753 show_memory_packet_size (&memory_read_packet_config
);
757 get_memory_read_packet_size (void)
759 long size
= get_memory_packet_size (&memory_read_packet_config
);
760 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
761 extra buffer size argument before the memory read size can be
762 increased beyond this. */
763 if (size
> get_remote_packet_size ())
764 size
= get_remote_packet_size ();
769 /* Generic configuration support for packets the stub optionally
770 supports. Allows the user to specify the use of the packet as well
771 as allowing GDB to auto-detect support in the remote stub. */
775 PACKET_SUPPORT_UNKNOWN
= 0,
784 enum auto_boolean detect
;
785 enum packet_support support
;
788 /* Analyze a packet's return value and update the packet config
799 update_packet_config (struct packet_config
*config
)
801 switch (config
->detect
)
803 case AUTO_BOOLEAN_TRUE
:
804 config
->support
= PACKET_ENABLE
;
806 case AUTO_BOOLEAN_FALSE
:
807 config
->support
= PACKET_DISABLE
;
809 case AUTO_BOOLEAN_AUTO
:
810 config
->support
= PACKET_SUPPORT_UNKNOWN
;
816 show_packet_config_cmd (struct packet_config
*config
)
818 char *support
= "internal-error";
819 switch (config
->support
)
825 support
= "disabled";
827 case PACKET_SUPPORT_UNKNOWN
:
831 switch (config
->detect
)
833 case AUTO_BOOLEAN_AUTO
:
834 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
835 config
->name
, support
);
837 case AUTO_BOOLEAN_TRUE
:
838 case AUTO_BOOLEAN_FALSE
:
839 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
840 config
->name
, support
);
846 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
847 const char *title
, int legacy
)
854 config
->title
= title
;
855 config
->detect
= AUTO_BOOLEAN_AUTO
;
856 config
->support
= PACKET_SUPPORT_UNKNOWN
;
857 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
859 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
861 /* set/show TITLE-packet {auto,on,off} */
862 cmd_name
= xstrprintf ("%s-packet", title
);
863 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
864 &config
->detect
, set_doc
, show_doc
, NULL
, /* help_doc */
865 set_remote_protocol_packet_cmd
,
866 show_remote_protocol_packet_cmd
,
867 &remote_set_cmdlist
, &remote_show_cmdlist
);
868 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
872 legacy_name
= xstrprintf ("%s-packet", name
);
873 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
874 &remote_set_cmdlist
);
875 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
876 &remote_show_cmdlist
);
880 static enum packet_result
881 packet_check_result (const char *buf
)
885 /* The stub recognized the packet request. Check that the
886 operation succeeded. */
888 && isxdigit (buf
[1]) && isxdigit (buf
[2])
890 /* "Enn" - definitly an error. */
893 /* Always treat "E." as an error. This will be used for
894 more verbose error messages, such as E.memtypes. */
895 if (buf
[0] == 'E' && buf
[1] == '.')
898 /* The packet may or may not be OK. Just assume it is. */
902 /* The stub does not support the packet. */
903 return PACKET_UNKNOWN
;
906 static enum packet_result
907 packet_ok (const char *buf
, struct packet_config
*config
)
909 enum packet_result result
;
911 result
= packet_check_result (buf
);
916 /* The stub recognized the packet request. */
917 switch (config
->support
)
919 case PACKET_SUPPORT_UNKNOWN
:
921 fprintf_unfiltered (gdb_stdlog
,
922 "Packet %s (%s) is supported\n",
923 config
->name
, config
->title
);
924 config
->support
= PACKET_ENABLE
;
927 internal_error (__FILE__
, __LINE__
,
928 _("packet_ok: attempt to use a disabled packet"));
935 /* The stub does not support the packet. */
936 switch (config
->support
)
939 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
940 /* If the stub previously indicated that the packet was
941 supported then there is a protocol error.. */
942 error (_("Protocol error: %s (%s) conflicting enabled responses."),
943 config
->name
, config
->title
);
945 /* The user set it wrong. */
946 error (_("Enabled packet %s (%s) not recognized by stub"),
947 config
->name
, config
->title
);
949 case PACKET_SUPPORT_UNKNOWN
:
951 fprintf_unfiltered (gdb_stdlog
,
952 "Packet %s (%s) is NOT supported\n",
953 config
->name
, config
->title
);
954 config
->support
= PACKET_DISABLE
;
982 PACKET_qXfer_features
,
983 PACKET_qXfer_libraries
,
984 PACKET_qXfer_memory_map
,
985 PACKET_qXfer_spu_read
,
986 PACKET_qXfer_spu_write
,
991 PACKET_qSearch_memory
,
994 PACKET_QStartNoAckMode
,
996 PACKET_qXfer_siginfo_read
,
997 PACKET_qXfer_siginfo_write
,
999 PACKET_ConditionalTracepoints
,
1003 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1006 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
1007 struct cmd_list_element
*c
)
1009 struct packet_config
*packet
;
1011 for (packet
= remote_protocol_packets
;
1012 packet
< &remote_protocol_packets
[PACKET_MAX
];
1015 if (&packet
->detect
== c
->var
)
1017 update_packet_config (packet
);
1021 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1026 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1027 struct cmd_list_element
*c
,
1030 struct packet_config
*packet
;
1032 for (packet
= remote_protocol_packets
;
1033 packet
< &remote_protocol_packets
[PACKET_MAX
];
1036 if (&packet
->detect
== c
->var
)
1038 show_packet_config_cmd (packet
);
1042 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1046 /* Should we try one of the 'Z' requests? */
1050 Z_PACKET_SOFTWARE_BP
,
1051 Z_PACKET_HARDWARE_BP
,
1058 /* For compatibility with older distributions. Provide a ``set remote
1059 Z-packet ...'' command that updates all the Z packet types. */
1061 static enum auto_boolean remote_Z_packet_detect
;
1064 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1065 struct cmd_list_element
*c
)
1068 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1070 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1071 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1076 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1077 struct cmd_list_element
*c
,
1081 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1083 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1087 /* Should we try the 'ThreadInfo' query packet?
1089 This variable (NOT available to the user: auto-detect only!)
1090 determines whether GDB will use the new, simpler "ThreadInfo"
1091 query or the older, more complex syntax for thread queries.
1092 This is an auto-detect variable (set to true at each connect,
1093 and set to false when the target fails to recognize it). */
1095 static int use_threadinfo_query
;
1096 static int use_threadextra_query
;
1098 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1099 static struct async_signal_handler
*sigint_remote_twice_token
;
1100 static struct async_signal_handler
*sigint_remote_token
;
1103 /* Asynchronous signal handle registered as event loop source for
1104 when we have pending events ready to be passed to the core. */
1106 static struct async_event_handler
*remote_async_inferior_event_token
;
1108 /* Asynchronous signal handle registered as event loop source for when
1109 the remote sent us a %Stop notification. The registered callback
1110 will do a vStopped sequence to pull the rest of the events out of
1111 the remote side into our event queue. */
1113 static struct async_event_handler
*remote_async_get_pending_events_token
;
1116 static ptid_t magic_null_ptid
;
1117 static ptid_t not_sent_ptid
;
1118 static ptid_t any_thread_ptid
;
1120 /* These are the threads which we last sent to the remote system. The
1121 TID member will be -1 for all or -2 for not sent yet. */
1123 static ptid_t general_thread
;
1124 static ptid_t continue_thread
;
1126 /* Find out if the stub attached to PID (and hence GDB should offer to
1127 detach instead of killing it when bailing out). */
1130 remote_query_attached (int pid
)
1132 struct remote_state
*rs
= get_remote_state ();
1134 if (remote_protocol_packets
[PACKET_qAttached
].support
== PACKET_DISABLE
)
1137 if (remote_multi_process_p (rs
))
1138 sprintf (rs
->buf
, "qAttached:%x", pid
);
1140 sprintf (rs
->buf
, "qAttached");
1143 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1145 switch (packet_ok (rs
->buf
,
1146 &remote_protocol_packets
[PACKET_qAttached
]))
1149 if (strcmp (rs
->buf
, "1") == 0)
1153 warning (_("Remote failure reply: %s"), rs
->buf
);
1155 case PACKET_UNKNOWN
:
1162 /* Add PID to GDB's inferior table. Since we can be connected to a
1163 remote system before before knowing about any inferior, mark the
1164 target with execution when we find the first inferior. If ATTACHED
1165 is 1, then we had just attached to this inferior. If it is 0, then
1166 we just created this inferior. If it is -1, then try querying the
1167 remote stub to find out if it had attached to the inferior or
1170 static struct inferior
*
1171 remote_add_inferior (int pid
, int attached
)
1173 struct remote_state
*rs
= get_remote_state ();
1174 struct inferior
*inf
;
1176 /* Check whether this process we're learning about is to be
1177 considered attached, or if is to be considered to have been
1178 spawned by the stub. */
1180 attached
= remote_query_attached (pid
);
1182 inf
= add_inferior (pid
);
1184 inf
->attach_flag
= attached
;
1189 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1190 according to RUNNING. */
1193 remote_add_thread (ptid_t ptid
, int running
)
1197 set_executing (ptid
, running
);
1198 set_running (ptid
, running
);
1201 /* Come here when we learn about a thread id from the remote target.
1202 It may be the first time we hear about such thread, so take the
1203 opportunity to add it to GDB's thread list. In case this is the
1204 first time we're noticing its corresponding inferior, add it to
1205 GDB's inferior list as well. */
1208 remote_notice_new_inferior (ptid_t currthread
, int running
)
1210 struct remote_state
*rs
= get_remote_state ();
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 ();
1429 int tid
= ptid_get_tid (ptid
);
1432 if (ptid_equal (ptid
, magic_null_ptid
))
1433 /* The main thread is always alive. */
1436 if (ptid_get_pid (ptid
) != 0 && ptid_get_tid (ptid
) == 0)
1437 /* The main thread is always alive. This can happen after a
1438 vAttach, if the remote side doesn't support
1443 endp
= rs
->buf
+ get_remote_packet_size ();
1446 write_ptid (p
, endp
, ptid
);
1449 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1450 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1453 /* About these extended threadlist and threadinfo packets. They are
1454 variable length packets but, the fields within them are often fixed
1455 length. They are redundent enough to send over UDP as is the
1456 remote protocol in general. There is a matching unit test module
1459 #define OPAQUETHREADBYTES 8
1461 /* a 64 bit opaque identifier */
1462 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1464 /* WARNING: This threadref data structure comes from the remote O.S.,
1465 libstub protocol encoding, and remote.c. it is not particularly
1468 /* Right now, the internal structure is int. We want it to be bigger.
1472 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1474 /* gdb_ext_thread_info is an internal GDB data structure which is
1475 equivalent to the reply of the remote threadinfo packet. */
1477 struct gdb_ext_thread_info
1479 threadref threadid
; /* External form of thread reference. */
1480 int active
; /* Has state interesting to GDB?
1482 char display
[256]; /* Brief state display, name,
1483 blocked/suspended. */
1484 char shortname
[32]; /* To be used to name threads. */
1485 char more_display
[256]; /* Long info, statistics, queue depth,
1489 /* The volume of remote transfers can be limited by submitting
1490 a mask containing bits specifying the desired information.
1491 Use a union of these values as the 'selection' parameter to
1492 get_thread_info. FIXME: Make these TAG names more thread specific.
1495 #define TAG_THREADID 1
1496 #define TAG_EXISTS 2
1497 #define TAG_DISPLAY 4
1498 #define TAG_THREADNAME 8
1499 #define TAG_MOREDISPLAY 16
1501 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1503 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1505 static char *unpack_nibble (char *buf
, int *val
);
1507 static char *pack_nibble (char *buf
, int nibble
);
1509 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1511 static char *unpack_byte (char *buf
, int *value
);
1513 static char *pack_int (char *buf
, int value
);
1515 static char *unpack_int (char *buf
, int *value
);
1517 static char *unpack_string (char *src
, char *dest
, int length
);
1519 static char *pack_threadid (char *pkt
, threadref
*id
);
1521 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1523 void int_to_threadref (threadref
*id
, int value
);
1525 static int threadref_to_int (threadref
*ref
);
1527 static void copy_threadref (threadref
*dest
, threadref
*src
);
1529 static int threadmatch (threadref
*dest
, threadref
*src
);
1531 static char *pack_threadinfo_request (char *pkt
, int mode
,
1534 static int remote_unpack_thread_info_response (char *pkt
,
1535 threadref
*expectedref
,
1536 struct gdb_ext_thread_info
1540 static int remote_get_threadinfo (threadref
*threadid
,
1541 int fieldset
, /*TAG mask */
1542 struct gdb_ext_thread_info
*info
);
1544 static char *pack_threadlist_request (char *pkt
, int startflag
,
1546 threadref
*nextthread
);
1548 static int parse_threadlist_response (char *pkt
,
1550 threadref
*original_echo
,
1551 threadref
*resultlist
,
1554 static int remote_get_threadlist (int startflag
,
1555 threadref
*nextthread
,
1559 threadref
*threadlist
);
1561 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1563 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1564 void *context
, int looplimit
);
1566 static int remote_newthread_step (threadref
*ref
, void *context
);
1569 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1570 buffer we're allowed to write to. Returns
1571 BUF+CHARACTERS_WRITTEN. */
1574 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
1577 struct remote_state
*rs
= get_remote_state ();
1579 if (remote_multi_process_p (rs
))
1581 pid
= ptid_get_pid (ptid
);
1583 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
1585 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
1587 tid
= ptid_get_tid (ptid
);
1589 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
1591 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
1596 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1597 passed the last parsed char. Returns null_ptid on error. */
1600 read_ptid (char *buf
, char **obuf
)
1604 ULONGEST pid
= 0, tid
= 0;
1609 /* Multi-process ptid. */
1610 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1612 error (_("invalid remote ptid: %s\n"), p
);
1615 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1618 return ptid_build (pid
, 0, tid
);
1621 /* No multi-process. Just a tid. */
1622 pp
= unpack_varlen_hex (p
, &tid
);
1624 /* Since the stub is not sending a process id, then default to
1625 what's in inferior_ptid, unless it's null at this point. If so,
1626 then since there's no way to know the pid of the reported
1627 threads, use the magic number. */
1628 if (ptid_equal (inferior_ptid
, null_ptid
))
1629 pid
= ptid_get_pid (magic_null_ptid
);
1631 pid
= ptid_get_pid (inferior_ptid
);
1635 return ptid_build (pid
, 0, tid
);
1638 /* Encode 64 bits in 16 chars of hex. */
1640 static const char hexchars
[] = "0123456789abcdef";
1643 ishex (int ch
, int *val
)
1645 if ((ch
>= 'a') && (ch
<= 'f'))
1647 *val
= ch
- 'a' + 10;
1650 if ((ch
>= 'A') && (ch
<= 'F'))
1652 *val
= ch
- 'A' + 10;
1655 if ((ch
>= '0') && (ch
<= '9'))
1666 if (ch
>= 'a' && ch
<= 'f')
1667 return ch
- 'a' + 10;
1668 if (ch
>= '0' && ch
<= '9')
1670 if (ch
>= 'A' && ch
<= 'F')
1671 return ch
- 'A' + 10;
1676 stub_unpack_int (char *buff
, int fieldlength
)
1683 nibble
= stubhex (*buff
++);
1687 retval
= retval
<< 4;
1693 unpack_varlen_hex (char *buff
, /* packet to parse */
1697 ULONGEST retval
= 0;
1699 while (ishex (*buff
, &nibble
))
1702 retval
= retval
<< 4;
1703 retval
|= nibble
& 0x0f;
1710 unpack_nibble (char *buf
, int *val
)
1712 *val
= fromhex (*buf
++);
1717 pack_nibble (char *buf
, int nibble
)
1719 *buf
++ = hexchars
[(nibble
& 0x0f)];
1724 pack_hex_byte (char *pkt
, int byte
)
1726 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1727 *pkt
++ = hexchars
[(byte
& 0xf)];
1732 unpack_byte (char *buf
, int *value
)
1734 *value
= stub_unpack_int (buf
, 2);
1739 pack_int (char *buf
, int value
)
1741 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1742 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1743 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1744 buf
= pack_hex_byte (buf
, (value
& 0xff));
1749 unpack_int (char *buf
, int *value
)
1751 *value
= stub_unpack_int (buf
, 8);
1755 #if 0 /* Currently unused, uncomment when needed. */
1756 static char *pack_string (char *pkt
, char *string
);
1759 pack_string (char *pkt
, char *string
)
1764 len
= strlen (string
);
1766 len
= 200; /* Bigger than most GDB packets, junk??? */
1767 pkt
= pack_hex_byte (pkt
, len
);
1771 if ((ch
== '\0') || (ch
== '#'))
1772 ch
= '*'; /* Protect encapsulation. */
1777 #endif /* 0 (unused) */
1780 unpack_string (char *src
, char *dest
, int length
)
1789 pack_threadid (char *pkt
, threadref
*id
)
1792 unsigned char *altid
;
1794 altid
= (unsigned char *) id
;
1795 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1797 pkt
= pack_hex_byte (pkt
, *altid
++);
1803 unpack_threadid (char *inbuf
, threadref
*id
)
1806 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1809 altref
= (char *) id
;
1811 while (inbuf
< limit
)
1813 x
= stubhex (*inbuf
++);
1814 y
= stubhex (*inbuf
++);
1815 *altref
++ = (x
<< 4) | y
;
1820 /* Externally, threadrefs are 64 bits but internally, they are still
1821 ints. This is due to a mismatch of specifications. We would like
1822 to use 64bit thread references internally. This is an adapter
1826 int_to_threadref (threadref
*id
, int value
)
1828 unsigned char *scan
;
1830 scan
= (unsigned char *) id
;
1836 *scan
++ = (value
>> 24) & 0xff;
1837 *scan
++ = (value
>> 16) & 0xff;
1838 *scan
++ = (value
>> 8) & 0xff;
1839 *scan
++ = (value
& 0xff);
1843 threadref_to_int (threadref
*ref
)
1846 unsigned char *scan
;
1852 value
= (value
<< 8) | ((*scan
++) & 0xff);
1857 copy_threadref (threadref
*dest
, threadref
*src
)
1860 unsigned char *csrc
, *cdest
;
1862 csrc
= (unsigned char *) src
;
1863 cdest
= (unsigned char *) dest
;
1870 threadmatch (threadref
*dest
, threadref
*src
)
1872 /* Things are broken right now, so just assume we got a match. */
1874 unsigned char *srcp
, *destp
;
1876 srcp
= (char *) src
;
1877 destp
= (char *) dest
;
1881 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1888 threadid:1, # always request threadid
1895 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1898 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1900 *pkt
++ = 'q'; /* Info Query */
1901 *pkt
++ = 'P'; /* process or thread info */
1902 pkt
= pack_int (pkt
, mode
); /* mode */
1903 pkt
= pack_threadid (pkt
, id
); /* threadid */
1904 *pkt
= '\0'; /* terminate */
1908 /* These values tag the fields in a thread info response packet. */
1909 /* Tagging the fields allows us to request specific fields and to
1910 add more fields as time goes by. */
1912 #define TAG_THREADID 1 /* Echo the thread identifier. */
1913 #define TAG_EXISTS 2 /* Is this process defined enough to
1914 fetch registers and its stack? */
1915 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1916 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1917 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1921 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1922 struct gdb_ext_thread_info
*info
)
1924 struct remote_state
*rs
= get_remote_state ();
1928 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1931 /* info->threadid = 0; FIXME: implement zero_threadref. */
1933 info
->display
[0] = '\0';
1934 info
->shortname
[0] = '\0';
1935 info
->more_display
[0] = '\0';
1937 /* Assume the characters indicating the packet type have been
1939 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1940 pkt
= unpack_threadid (pkt
, &ref
);
1943 warning (_("Incomplete response to threadinfo request."));
1944 if (!threadmatch (&ref
, expectedref
))
1945 { /* This is an answer to a different request. */
1946 warning (_("ERROR RMT Thread info mismatch."));
1949 copy_threadref (&info
->threadid
, &ref
);
1951 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1953 /* Packets are terminated with nulls. */
1954 while ((pkt
< limit
) && mask
&& *pkt
)
1956 pkt
= unpack_int (pkt
, &tag
); /* tag */
1957 pkt
= unpack_byte (pkt
, &length
); /* length */
1958 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1960 warning (_("ERROR RMT: threadinfo tag mismatch."));
1964 if (tag
== TAG_THREADID
)
1968 warning (_("ERROR RMT: length of threadid is not 16."));
1972 pkt
= unpack_threadid (pkt
, &ref
);
1973 mask
= mask
& ~TAG_THREADID
;
1976 if (tag
== TAG_EXISTS
)
1978 info
->active
= stub_unpack_int (pkt
, length
);
1980 mask
= mask
& ~(TAG_EXISTS
);
1983 warning (_("ERROR RMT: 'exists' length too long."));
1989 if (tag
== TAG_THREADNAME
)
1991 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1992 mask
= mask
& ~TAG_THREADNAME
;
1995 if (tag
== TAG_DISPLAY
)
1997 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1998 mask
= mask
& ~TAG_DISPLAY
;
2001 if (tag
== TAG_MOREDISPLAY
)
2003 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2004 mask
= mask
& ~TAG_MOREDISPLAY
;
2007 warning (_("ERROR RMT: unknown thread info tag."));
2008 break; /* Not a tag we know about. */
2014 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2015 struct gdb_ext_thread_info
*info
)
2017 struct remote_state
*rs
= get_remote_state ();
2020 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2022 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2024 if (rs
->buf
[0] == '\0')
2027 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2032 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2035 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2036 threadref
*nextthread
)
2038 *pkt
++ = 'q'; /* info query packet */
2039 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2040 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2041 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2042 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2047 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2050 parse_threadlist_response (char *pkt
, int result_limit
,
2051 threadref
*original_echo
, threadref
*resultlist
,
2054 struct remote_state
*rs
= get_remote_state ();
2056 int count
, resultcount
, done
;
2059 /* Assume the 'q' and 'M chars have been stripped. */
2060 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2061 /* done parse past here */
2062 pkt
= unpack_byte (pkt
, &count
); /* count field */
2063 pkt
= unpack_nibble (pkt
, &done
);
2064 /* The first threadid is the argument threadid. */
2065 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2066 while ((count
-- > 0) && (pkt
< limit
))
2068 pkt
= unpack_threadid (pkt
, resultlist
++);
2069 if (resultcount
++ >= result_limit
)
2078 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2079 int *done
, int *result_count
, threadref
*threadlist
)
2081 struct remote_state
*rs
= get_remote_state ();
2082 static threadref echo_nextthread
;
2085 /* Trancate result limit to be smaller than the packet size. */
2086 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
2087 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2089 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2091 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2093 if (*rs
->buf
== '\0')
2097 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
2100 if (!threadmatch (&echo_nextthread
, nextthread
))
2102 /* FIXME: This is a good reason to drop the packet. */
2103 /* Possably, there is a duplicate response. */
2105 retransmit immediatly - race conditions
2106 retransmit after timeout - yes
2108 wait for packet, then exit
2110 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2111 return 0; /* I choose simply exiting. */
2113 if (*result_count
<= 0)
2117 warning (_("RMT ERROR : failed to get remote thread list."));
2120 return result
; /* break; */
2122 if (*result_count
> result_limit
)
2125 warning (_("RMT ERROR: threadlist response longer than requested."));
2131 /* This is the interface between remote and threads, remotes upper
2134 /* remote_find_new_threads retrieves the thread list and for each
2135 thread in the list, looks up the thread in GDB's internal list,
2136 adding the thread if it does not already exist. This involves
2137 getting partial thread lists from the remote target so, polling the
2138 quit_flag is required. */
2141 /* About this many threadisds fit in a packet. */
2143 #define MAXTHREADLISTRESULTS 32
2146 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2149 int done
, i
, result_count
;
2153 static threadref nextthread
;
2154 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
2159 if (loopcount
++ > looplimit
)
2162 warning (_("Remote fetch threadlist -infinite loop-."));
2165 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
2166 &done
, &result_count
, resultthreadlist
))
2171 /* Clear for later iterations. */
2173 /* Setup to resume next batch of thread references, set nextthread. */
2174 if (result_count
>= 1)
2175 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2177 while (result_count
--)
2178 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2185 remote_newthread_step (threadref
*ref
, void *context
)
2187 int pid
= ptid_get_pid (inferior_ptid
);
2188 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2190 if (!in_thread_list (ptid
))
2192 return 1; /* continue iterator */
2195 #define CRAZY_MAX_THREADS 1000
2198 remote_current_thread (ptid_t oldpid
)
2200 struct remote_state
*rs
= get_remote_state ();
2206 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2207 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2208 return read_ptid (&rs
->buf
[2], NULL
);
2213 /* Find new threads for info threads command.
2214 * Original version, using John Metzler's thread protocol.
2218 remote_find_new_threads (void)
2220 remote_threadlist_iterator (remote_newthread_step
, 0,
2225 * Find all threads for info threads command.
2226 * Uses new thread protocol contributed by Cisco.
2227 * Falls back and attempts to use the older method (above)
2228 * if the target doesn't respond to the new method.
2232 remote_threads_info (struct target_ops
*ops
)
2234 struct remote_state
*rs
= get_remote_state ();
2238 if (remote_desc
== 0) /* paranoia */
2239 error (_("Command can only be used when connected to the remote target."));
2241 if (use_threadinfo_query
)
2243 putpkt ("qfThreadInfo");
2244 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2246 if (bufp
[0] != '\0') /* q packet recognized */
2248 while (*bufp
++ == 'm') /* reply contains one or more TID */
2252 new_thread
= read_ptid (bufp
, &bufp
);
2253 if (!ptid_equal (new_thread
, null_ptid
))
2255 /* In non-stop mode, we assume new found threads
2256 are running until proven otherwise with a
2257 stop reply. In all-stop, we can only get
2258 here if all threads are stopped. */
2259 int running
= non_stop
? 1 : 0;
2261 remote_notice_new_inferior (new_thread
, running
);
2264 while (*bufp
++ == ','); /* comma-separated list */
2265 putpkt ("qsThreadInfo");
2266 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2273 /* Only qfThreadInfo is supported in non-stop mode. */
2277 /* Else fall back to old method based on jmetzler protocol. */
2278 use_threadinfo_query
= 0;
2279 remote_find_new_threads ();
2284 * Collect a descriptive string about the given thread.
2285 * The target may say anything it wants to about the thread
2286 * (typically info about its blocked / runnable state, name, etc.).
2287 * This string will appear in the info threads display.
2289 * Optional: targets are not required to implement this function.
2293 remote_threads_extra_info (struct thread_info
*tp
)
2295 struct remote_state
*rs
= get_remote_state ();
2299 struct gdb_ext_thread_info threadinfo
;
2300 static char display_buf
[100]; /* arbitrary... */
2301 int n
= 0; /* position in display_buf */
2303 if (remote_desc
== 0) /* paranoia */
2304 internal_error (__FILE__
, __LINE__
,
2305 _("remote_threads_extra_info"));
2307 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2308 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2309 /* This is the main thread which was added by GDB. The remote
2310 server doesn't know about it. */
2313 if (use_threadextra_query
)
2316 char *endb
= rs
->buf
+ get_remote_packet_size ();
2318 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2320 write_ptid (b
, endb
, tp
->ptid
);
2323 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2324 if (rs
->buf
[0] != 0)
2326 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2327 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2328 display_buf
[result
] = '\0';
2333 /* If the above query fails, fall back to the old method. */
2334 use_threadextra_query
= 0;
2335 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2336 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2337 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2338 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2339 if (threadinfo
.active
)
2341 if (*threadinfo
.shortname
)
2342 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2343 " Name: %s,", threadinfo
.shortname
);
2344 if (*threadinfo
.display
)
2345 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2346 " State: %s,", threadinfo
.display
);
2347 if (*threadinfo
.more_display
)
2348 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2349 " Priority: %s", threadinfo
.more_display
);
2353 /* For purely cosmetic reasons, clear up trailing commas. */
2354 if (',' == display_buf
[n
-1])
2355 display_buf
[n
-1] = ' ';
2363 /* Restart the remote side; this is an extended protocol operation. */
2366 extended_remote_restart (void)
2368 struct remote_state
*rs
= get_remote_state ();
2370 /* Send the restart command; for reasons I don't understand the
2371 remote side really expects a number after the "R". */
2372 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2375 remote_fileio_reset ();
2378 /* Clean up connection to a remote debugger. */
2381 remote_close (int quitting
)
2383 if (remote_desc
== NULL
)
2384 return; /* already closed */
2386 /* Make sure we leave stdin registered in the event loop, and we
2387 don't leave the async SIGINT signal handler installed. */
2388 remote_terminal_ours ();
2390 serial_close (remote_desc
);
2393 /* We don't have a connection to the remote stub anymore. Get rid
2394 of all the inferiors and their threads we were controlling. */
2395 discard_all_inferiors ();
2397 /* We're no longer interested in any of these events. */
2398 discard_pending_stop_replies (-1);
2400 if (remote_async_inferior_event_token
)
2401 delete_async_event_handler (&remote_async_inferior_event_token
);
2402 if (remote_async_get_pending_events_token
)
2403 delete_async_event_handler (&remote_async_get_pending_events_token
);
2406 /* Query the remote side for the text, data and bss offsets. */
2411 struct remote_state
*rs
= get_remote_state ();
2414 int lose
, num_segments
= 0, do_sections
, do_segments
;
2415 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2416 struct section_offsets
*offs
;
2417 struct symfile_segment_data
*data
;
2419 if (symfile_objfile
== NULL
)
2422 putpkt ("qOffsets");
2423 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2426 if (buf
[0] == '\000')
2427 return; /* Return silently. Stub doesn't support
2431 warning (_("Remote failure reply: %s"), buf
);
2435 /* Pick up each field in turn. This used to be done with scanf, but
2436 scanf will make trouble if CORE_ADDR size doesn't match
2437 conversion directives correctly. The following code will work
2438 with any size of CORE_ADDR. */
2439 text_addr
= data_addr
= bss_addr
= 0;
2443 if (strncmp (ptr
, "Text=", 5) == 0)
2446 /* Don't use strtol, could lose on big values. */
2447 while (*ptr
&& *ptr
!= ';')
2448 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2450 if (strncmp (ptr
, ";Data=", 6) == 0)
2453 while (*ptr
&& *ptr
!= ';')
2454 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2459 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2462 while (*ptr
&& *ptr
!= ';')
2463 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2465 if (bss_addr
!= data_addr
)
2466 warning (_("Target reported unsupported offsets: %s"), buf
);
2471 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
2474 /* Don't use strtol, could lose on big values. */
2475 while (*ptr
&& *ptr
!= ';')
2476 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2479 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
2482 while (*ptr
&& *ptr
!= ';')
2483 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2491 error (_("Malformed response to offset query, %s"), buf
);
2492 else if (*ptr
!= '\0')
2493 warning (_("Target reported unsupported offsets: %s"), buf
);
2495 offs
= ((struct section_offsets
*)
2496 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2497 memcpy (offs
, symfile_objfile
->section_offsets
,
2498 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2500 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
2501 do_segments
= (data
!= NULL
);
2502 do_sections
= num_segments
== 0;
2504 if (num_segments
> 0)
2506 segments
[0] = text_addr
;
2507 segments
[1] = data_addr
;
2509 /* If we have two segments, we can still try to relocate everything
2510 by assuming that the .text and .data offsets apply to the whole
2511 text and data segments. Convert the offsets given in the packet
2512 to base addresses for symfile_map_offsets_to_segments. */
2513 else if (data
&& data
->num_segments
== 2)
2515 segments
[0] = data
->segment_bases
[0] + text_addr
;
2516 segments
[1] = data
->segment_bases
[1] + data_addr
;
2519 /* If the object file has only one segment, assume that it is text
2520 rather than data; main programs with no writable data are rare,
2521 but programs with no code are useless. Of course the code might
2522 have ended up in the data segment... to detect that we would need
2523 the permissions here. */
2524 else if (data
&& data
->num_segments
== 1)
2526 segments
[0] = data
->segment_bases
[0] + text_addr
;
2529 /* There's no way to relocate by segment. */
2535 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
2536 offs
, num_segments
, segments
);
2538 if (ret
== 0 && !do_sections
)
2539 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2546 free_symfile_segment_data (data
);
2550 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2552 /* This is a temporary kludge to force data and bss to use the same offsets
2553 because that's what nlmconv does now. The real solution requires changes
2554 to the stub and remote.c that I don't have time to do right now. */
2556 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2557 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2560 objfile_relocate (symfile_objfile
, offs
);
2563 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2564 threads we know are stopped already. This is used during the
2565 initial remote connection in non-stop mode --- threads that are
2566 reported as already being stopped are left stopped. */
2569 set_stop_requested_callback (struct thread_info
*thread
, void *data
)
2571 /* If we have a stop reply for this thread, it must be stopped. */
2572 if (peek_stop_reply (thread
->ptid
))
2573 set_stop_requested (thread
->ptid
, 1);
2578 /* Stub for catch_exception. */
2580 struct start_remote_args
2584 /* The current target. */
2585 struct target_ops
*target
;
2587 /* Non-zero if this is an extended-remote target. */
2592 remote_start_remote (struct ui_out
*uiout
, void *opaque
)
2594 struct start_remote_args
*args
= opaque
;
2595 struct remote_state
*rs
= get_remote_state ();
2596 struct packet_config
*noack_config
;
2597 char *wait_status
= NULL
;
2599 immediate_quit
++; /* Allow user to interrupt it. */
2601 /* Ack any packet which the remote side has already sent. */
2602 serial_write (remote_desc
, "+", 1);
2604 /* The first packet we send to the target is the optional "supported
2605 packets" request. If the target can answer this, it will tell us
2606 which later probes to skip. */
2607 remote_query_supported ();
2609 /* Next, we possibly activate noack mode.
2611 If the QStartNoAckMode packet configuration is set to AUTO,
2612 enable noack mode if the stub reported a wish for it with
2615 If set to TRUE, then enable noack mode even if the stub didn't
2616 report it in qSupported. If the stub doesn't reply OK, the
2617 session ends with an error.
2619 If FALSE, then don't activate noack mode, regardless of what the
2620 stub claimed should be the default with qSupported. */
2622 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
2624 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
2625 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
2626 && noack_config
->support
== PACKET_ENABLE
))
2628 putpkt ("QStartNoAckMode");
2629 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2630 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
2634 if (args
->extended_p
)
2636 /* Tell the remote that we are using the extended protocol. */
2638 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2641 /* Next, if the target can specify a description, read it. We do
2642 this before anything involving memory or registers. */
2643 target_find_description ();
2645 /* On OSs where the list of libraries is global to all
2646 processes, we fetch them early. */
2647 if (gdbarch_has_global_solist (target_gdbarch
))
2648 solib_add (NULL
, args
->from_tty
, args
->target
, auto_solib_add
);
2652 if (!rs
->non_stop_aware
)
2653 error (_("Non-stop mode requested, but remote does not support non-stop"));
2655 putpkt ("QNonStop:1");
2656 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2658 if (strcmp (rs
->buf
, "OK") != 0)
2659 error ("Remote refused setting non-stop mode with: %s", rs
->buf
);
2661 /* Find about threads and processes the stub is already
2662 controlling. We default to adding them in the running state.
2663 The '?' query below will then tell us about which threads are
2665 remote_threads_info (args
->target
);
2667 else if (rs
->non_stop_aware
)
2669 /* Don't assume that the stub can operate in all-stop mode.
2670 Request it explicitely. */
2671 putpkt ("QNonStop:0");
2672 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2674 if (strcmp (rs
->buf
, "OK") != 0)
2675 error ("Remote refused setting all-stop mode with: %s", rs
->buf
);
2678 /* Check whether the target is running now. */
2680 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2684 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
2686 if (!args
->extended_p
)
2687 error (_("The target is not running (try extended-remote?)"));
2689 /* We're connected, but not running. Drop out before we
2690 call start_remote. */
2695 /* Save the reply for later. */
2696 wait_status
= alloca (strlen (rs
->buf
) + 1);
2697 strcpy (wait_status
, rs
->buf
);
2700 /* Let the stub know that we want it to return the thread. */
2701 set_continue_thread (minus_one_ptid
);
2703 /* Without this, some commands which require an active target
2704 (such as kill) won't work. This variable serves (at least)
2705 double duty as both the pid of the target process (if it has
2706 such), and as a flag indicating that a target is active.
2707 These functions should be split out into seperate variables,
2708 especially since GDB will someday have a notion of debugging
2709 several processes. */
2710 inferior_ptid
= magic_null_ptid
;
2712 /* Now, if we have thread information, update inferior_ptid. */
2713 inferior_ptid
= remote_current_thread (inferior_ptid
);
2715 remote_add_inferior (ptid_get_pid (inferior_ptid
), -1);
2717 /* Always add the main thread. */
2718 add_thread_silent (inferior_ptid
);
2720 get_offsets (); /* Get text, data & bss offsets. */
2722 /* If we could not find a description using qXfer, and we know
2723 how to do it some other way, try again. This is not
2724 supported for non-stop; it could be, but it is tricky if
2725 there are no stopped threads when we connect. */
2726 if (remote_read_description_p (args
->target
)
2727 && gdbarch_target_desc (target_gdbarch
) == NULL
)
2729 target_clear_description ();
2730 target_find_description ();
2733 /* Use the previously fetched status. */
2734 gdb_assert (wait_status
!= NULL
);
2735 strcpy (rs
->buf
, wait_status
);
2736 rs
->cached_wait_status
= 1;
2739 start_remote (args
->from_tty
); /* Initialize gdb process mechanisms. */
2743 /* Clear WFI global state. Do this before finding about new
2744 threads and inferiors, and setting the current inferior.
2745 Otherwise we would clear the proceed status of the current
2746 inferior when we want its stop_soon state to be preserved
2747 (see notice_new_inferior). */
2748 init_wait_for_inferior ();
2750 /* In non-stop, we will either get an "OK", meaning that there
2751 are no stopped threads at this time; or, a regular stop
2752 reply. In the latter case, there may be more than one thread
2753 stopped --- we pull them all out using the vStopped
2755 if (strcmp (rs
->buf
, "OK") != 0)
2757 struct stop_reply
*stop_reply
;
2758 struct cleanup
*old_chain
;
2760 stop_reply
= stop_reply_xmalloc ();
2761 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
2763 remote_parse_stop_reply (rs
->buf
, stop_reply
);
2764 discard_cleanups (old_chain
);
2766 /* get_pending_stop_replies acks this one, and gets the rest
2768 pending_stop_reply
= stop_reply
;
2769 remote_get_pending_stop_replies ();
2771 /* Make sure that threads that were stopped remain
2773 iterate_over_threads (set_stop_requested_callback
, NULL
);
2776 if (target_can_async_p ())
2777 target_async (inferior_event_handler
, 0);
2779 if (thread_count () == 0)
2781 if (!args
->extended_p
)
2782 error (_("The target is not running (try extended-remote?)"));
2784 /* We're connected, but not running. Drop out before we
2785 call start_remote. */
2789 /* Let the stub know that we want it to return the thread. */
2791 /* Force the stub to choose a thread. */
2792 set_general_thread (null_ptid
);
2795 inferior_ptid
= remote_current_thread (minus_one_ptid
);
2796 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
2797 error (_("remote didn't report the current thread in non-stop mode"));
2799 get_offsets (); /* Get text, data & bss offsets. */
2801 /* In non-stop mode, any cached wait status will be stored in
2802 the stop reply queue. */
2803 gdb_assert (wait_status
== NULL
);
2806 /* If we connected to a live target, do some additional setup. */
2807 if (target_has_execution
)
2809 if (exec_bfd
) /* No use without an exec file. */
2810 remote_check_symbols (symfile_objfile
);
2813 /* If breakpoints are global, insert them now. */
2814 if (gdbarch_has_global_breakpoints (target_gdbarch
)
2815 && breakpoints_always_inserted_mode ())
2816 insert_breakpoints ();
2819 /* Open a connection to a remote debugger.
2820 NAME is the filename used for communication. */
2823 remote_open (char *name
, int from_tty
)
2825 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2828 /* Open a connection to a remote debugger using the extended
2829 remote gdb protocol. NAME is the filename used for communication. */
2832 extended_remote_open (char *name
, int from_tty
)
2834 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
2837 /* Generic code for opening a connection to a remote target. */
2840 init_all_packet_configs (void)
2843 for (i
= 0; i
< PACKET_MAX
; i
++)
2844 update_packet_config (&remote_protocol_packets
[i
]);
2847 /* Symbol look-up. */
2850 remote_check_symbols (struct objfile
*objfile
)
2852 struct remote_state
*rs
= get_remote_state ();
2853 char *msg
, *reply
, *tmp
;
2854 struct minimal_symbol
*sym
;
2857 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2860 /* Make sure the remote is pointing at the right process. */
2861 set_general_process ();
2863 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2864 because we need both at the same time. */
2865 msg
= alloca (get_remote_packet_size ());
2867 /* Invite target to request symbol lookups. */
2869 putpkt ("qSymbol::");
2870 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2871 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2874 while (strncmp (reply
, "qSymbol:", 8) == 0)
2877 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2879 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2881 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2884 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
2885 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
2887 /* If this is a function address, return the start of code
2888 instead of any data function descriptor. */
2889 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
2893 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2894 phex_nz (sym_addr
, addr_size
), &reply
[8]);
2898 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2903 static struct serial
*
2904 remote_serial_open (char *name
)
2906 static int udp_warning
= 0;
2908 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2909 of in ser-tcp.c, because it is the remote protocol assuming that the
2910 serial connection is reliable and not the serial connection promising
2912 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2915 The remote protocol may be unreliable over UDP.\n\
2916 Some events may be lost, rendering further debugging impossible."));
2920 return serial_open (name
);
2923 /* This type describes each known response to the qSupported
2925 struct protocol_feature
2927 /* The name of this protocol feature. */
2930 /* The default for this protocol feature. */
2931 enum packet_support default_support
;
2933 /* The function to call when this feature is reported, or after
2934 qSupported processing if the feature is not supported.
2935 The first argument points to this structure. The second
2936 argument indicates whether the packet requested support be
2937 enabled, disabled, or probed (or the default, if this function
2938 is being called at the end of processing and this feature was
2939 not reported). The third argument may be NULL; if not NULL, it
2940 is a NUL-terminated string taken from the packet following
2941 this feature's name and an equals sign. */
2942 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2945 /* The corresponding packet for this feature. Only used if
2946 FUNC is remote_supported_packet. */
2951 remote_supported_packet (const struct protocol_feature
*feature
,
2952 enum packet_support support
,
2953 const char *argument
)
2957 warning (_("Remote qSupported response supplied an unexpected value for"
2958 " \"%s\"."), feature
->name
);
2962 if (remote_protocol_packets
[feature
->packet
].support
2963 == PACKET_SUPPORT_UNKNOWN
)
2964 remote_protocol_packets
[feature
->packet
].support
= support
;
2968 remote_packet_size (const struct protocol_feature
*feature
,
2969 enum packet_support support
, const char *value
)
2971 struct remote_state
*rs
= get_remote_state ();
2976 if (support
!= PACKET_ENABLE
)
2979 if (value
== NULL
|| *value
== '\0')
2981 warning (_("Remote target reported \"%s\" without a size."),
2987 packet_size
= strtol (value
, &value_end
, 16);
2988 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2990 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2991 feature
->name
, value
);
2995 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2997 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2998 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2999 packet_size
= MAX_REMOTE_PACKET_SIZE
;
3002 /* Record the new maximum packet size. */
3003 rs
->explicit_packet_size
= packet_size
;
3007 remote_multi_process_feature (const struct protocol_feature
*feature
,
3008 enum packet_support support
, const char *value
)
3010 struct remote_state
*rs
= get_remote_state ();
3011 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
3015 remote_non_stop_feature (const struct protocol_feature
*feature
,
3016 enum packet_support support
, const char *value
)
3018 struct remote_state
*rs
= get_remote_state ();
3019 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
3023 remote_cond_tracepoint_feature (const struct protocol_feature
*feature
,
3024 enum packet_support support
,
3027 struct remote_state
*rs
= get_remote_state ();
3028 rs
->cond_tracepoints
= (support
== PACKET_ENABLE
);
3031 static struct protocol_feature remote_protocol_features
[] = {
3032 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
3033 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
3034 PACKET_qXfer_auxv
},
3035 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
3036 PACKET_qXfer_features
},
3037 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
3038 PACKET_qXfer_libraries
},
3039 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
3040 PACKET_qXfer_memory_map
},
3041 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
3042 PACKET_qXfer_spu_read
},
3043 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
3044 PACKET_qXfer_spu_write
},
3045 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
3046 PACKET_qXfer_osdata
},
3047 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
3048 PACKET_QPassSignals
},
3049 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
3050 PACKET_QStartNoAckMode
},
3051 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
3052 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
3053 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
3054 PACKET_qXfer_siginfo_read
},
3055 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
3056 PACKET_qXfer_siginfo_write
},
3057 { "ConditionalTracepoints", PACKET_DISABLE
, remote_cond_tracepoint_feature
,
3058 PACKET_ConditionalTracepoints
},
3062 remote_query_supported (void)
3064 struct remote_state
*rs
= get_remote_state ();
3067 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3069 /* The packet support flags are handled differently for this packet
3070 than for most others. We treat an error, a disabled packet, and
3071 an empty response identically: any features which must be reported
3072 to be used will be automatically disabled. An empty buffer
3073 accomplishes this, since that is also the representation for a list
3074 containing no features. */
3077 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3080 putpkt ("qSupported:multiprocess+");
3082 putpkt ("qSupported");
3084 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3086 /* If an error occured, warn, but do not return - just reset the
3087 buffer to empty and go on to disable features. */
3088 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3091 warning (_("Remote failure reply: %s"), rs
->buf
);
3096 memset (seen
, 0, sizeof (seen
));
3101 enum packet_support is_supported
;
3102 char *p
, *end
, *name_end
, *value
;
3104 /* First separate out this item from the rest of the packet. If
3105 there's another item after this, we overwrite the separator
3106 (terminated strings are much easier to work with). */
3108 end
= strchr (p
, ';');
3111 end
= p
+ strlen (p
);
3121 warning (_("empty item in \"qSupported\" response"));
3126 name_end
= strchr (p
, '=');
3129 /* This is a name=value entry. */
3130 is_supported
= PACKET_ENABLE
;
3131 value
= name_end
+ 1;
3140 is_supported
= PACKET_ENABLE
;
3144 is_supported
= PACKET_DISABLE
;
3148 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3152 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
3158 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3159 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3161 const struct protocol_feature
*feature
;
3164 feature
= &remote_protocol_features
[i
];
3165 feature
->func (feature
, is_supported
, value
);
3170 /* If we increased the packet size, make sure to increase the global
3171 buffer size also. We delay this until after parsing the entire
3172 qSupported packet, because this is the same buffer we were
3174 if (rs
->buf_size
< rs
->explicit_packet_size
)
3176 rs
->buf_size
= rs
->explicit_packet_size
;
3177 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3180 /* Handle the defaults for unmentioned features. */
3181 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3184 const struct protocol_feature
*feature
;
3186 feature
= &remote_protocol_features
[i
];
3187 feature
->func (feature
, feature
->default_support
, NULL
);
3193 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
, int extended_p
)
3195 struct remote_state
*rs
= get_remote_state ();
3198 error (_("To open a remote debug connection, you need to specify what\n"
3199 "serial device is attached to the remote system\n"
3200 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3202 /* See FIXME above. */
3203 if (!target_async_permitted
)
3204 wait_forever_enabled_p
= 1;
3206 /* If we're connected to a running target, target_preopen will kill it.
3207 But if we're connected to a target system with no running process,
3208 then we will still be connected when it returns. Ask this question
3209 first, before target_preopen has a chance to kill anything. */
3210 if (remote_desc
!= NULL
&& !have_inferiors ())
3213 || query (_("Already connected to a remote target. Disconnect? ")))
3216 error (_("Still connected."));
3219 target_preopen (from_tty
);
3221 unpush_target (target
);
3223 /* This time without a query. If we were connected to an
3224 extended-remote target and target_preopen killed the running
3225 process, we may still be connected. If we are starting "target
3226 remote" now, the extended-remote target will not have been
3227 removed by unpush_target. */
3228 if (remote_desc
!= NULL
&& !have_inferiors ())
3231 /* Make sure we send the passed signals list the next time we resume. */
3232 xfree (last_pass_packet
);
3233 last_pass_packet
= NULL
;
3235 remote_fileio_reset ();
3236 reopen_exec_file ();
3239 remote_desc
= remote_serial_open (name
);
3241 perror_with_name (name
);
3243 if (baud_rate
!= -1)
3245 if (serial_setbaudrate (remote_desc
, baud_rate
))
3247 /* The requested speed could not be set. Error out to
3248 top level after closing remote_desc. Take care to
3249 set remote_desc to NULL to avoid closing remote_desc
3251 serial_close (remote_desc
);
3253 perror_with_name (name
);
3257 serial_raw (remote_desc
);
3259 /* If there is something sitting in the buffer we might take it as a
3260 response to a command, which would be bad. */
3261 serial_flush_input (remote_desc
);
3265 puts_filtered ("Remote debugging using ");
3266 puts_filtered (name
);
3267 puts_filtered ("\n");
3269 push_target (target
); /* Switch to using remote target now. */
3271 /* Register extra event sources in the event loop. */
3272 remote_async_inferior_event_token
3273 = create_async_event_handler (remote_async_inferior_event_handler
,
3275 remote_async_get_pending_events_token
3276 = create_async_event_handler (remote_async_get_pending_events_handler
,
3279 /* Reset the target state; these things will be queried either by
3280 remote_query_supported or as they are needed. */
3281 init_all_packet_configs ();
3282 rs
->cached_wait_status
= 0;
3283 rs
->explicit_packet_size
= 0;
3285 rs
->multi_process_aware
= 0;
3286 rs
->extended
= extended_p
;
3287 rs
->non_stop_aware
= 0;
3288 rs
->waiting_for_stop_reply
= 0;
3290 general_thread
= not_sent_ptid
;
3291 continue_thread
= not_sent_ptid
;
3293 /* Probe for ability to use "ThreadInfo" query, as required. */
3294 use_threadinfo_query
= 1;
3295 use_threadextra_query
= 1;
3297 if (target_async_permitted
)
3299 /* With this target we start out by owning the terminal. */
3300 remote_async_terminal_ours_p
= 1;
3302 /* FIXME: cagney/1999-09-23: During the initial connection it is
3303 assumed that the target is already ready and able to respond to
3304 requests. Unfortunately remote_start_remote() eventually calls
3305 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3306 around this. Eventually a mechanism that allows
3307 wait_for_inferior() to expect/get timeouts will be
3309 wait_forever_enabled_p
= 0;
3312 /* First delete any symbols previously loaded from shared libraries. */
3313 no_shared_libraries (NULL
, 0);
3316 init_thread_list ();
3318 /* Start the remote connection. If error() or QUIT, discard this
3319 target (we'd otherwise be in an inconsistent state) and then
3320 propogate the error on up the exception chain. This ensures that
3321 the caller doesn't stumble along blindly assuming that the
3322 function succeeded. The CLI doesn't have this problem but other
3323 UI's, such as MI do.
3325 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3326 this function should return an error indication letting the
3327 caller restore the previous state. Unfortunately the command
3328 ``target remote'' is directly wired to this function making that
3329 impossible. On a positive note, the CLI side of this problem has
3330 been fixed - the function set_cmd_context() makes it possible for
3331 all the ``target ....'' commands to share a common callback
3332 function. See cli-dump.c. */
3334 struct gdb_exception ex
;
3335 struct start_remote_args args
;
3337 args
.from_tty
= from_tty
;
3338 args
.target
= target
;
3339 args
.extended_p
= extended_p
;
3341 ex
= catch_exception (uiout
, remote_start_remote
, &args
, RETURN_MASK_ALL
);
3344 /* Pop the partially set up target - unless something else did
3345 already before throwing the exception. */
3346 if (remote_desc
!= NULL
)
3348 if (target_async_permitted
)
3349 wait_forever_enabled_p
= 1;
3350 throw_exception (ex
);
3354 if (target_async_permitted
)
3355 wait_forever_enabled_p
= 1;
3358 /* This takes a program previously attached to and detaches it. After
3359 this is done, GDB can be used to debug some other program. We
3360 better not have left any breakpoints in the target program or it'll
3361 die when it hits one. */
3364 remote_detach_1 (char *args
, int from_tty
, int extended
)
3366 int pid
= ptid_get_pid (inferior_ptid
);
3367 struct remote_state
*rs
= get_remote_state ();
3370 error (_("Argument given to \"detach\" when remotely debugging."));
3372 if (!target_has_execution
)
3373 error (_("No process to detach from."));
3375 /* Tell the remote target to detach. */
3376 if (remote_multi_process_p (rs
))
3377 sprintf (rs
->buf
, "D;%x", pid
);
3379 strcpy (rs
->buf
, "D");
3382 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3384 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
3386 else if (rs
->buf
[0] == '\0')
3387 error (_("Remote doesn't know how to detach"));
3389 error (_("Can't detach process."));
3393 if (remote_multi_process_p (rs
))
3394 printf_filtered (_("Detached from remote %s.\n"),
3395 target_pid_to_str (pid_to_ptid (pid
)));
3399 puts_filtered (_("Detached from remote process.\n"));
3401 puts_filtered (_("Ending remote debugging.\n"));
3405 discard_pending_stop_replies (pid
);
3406 target_mourn_inferior ();
3410 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3412 remote_detach_1 (args
, from_tty
, 0);
3416 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3418 remote_detach_1 (args
, from_tty
, 1);
3421 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3424 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
3427 error (_("Argument given to \"disconnect\" when remotely debugging."));
3429 /* Make sure we unpush even the extended remote targets; mourn
3430 won't do it. So call remote_mourn_1 directly instead of
3431 target_mourn_inferior. */
3432 remote_mourn_1 (target
);
3435 puts_filtered ("Ending remote debugging.\n");
3438 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3439 be chatty about it. */
3442 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
3444 struct remote_state
*rs
= get_remote_state ();
3447 char *wait_status
= NULL
;
3450 error_no_arg (_("process-id to attach"));
3453 pid
= strtol (args
, &dummy
, 0);
3454 /* Some targets don't set errno on errors, grrr! */
3455 if (pid
== 0 && args
== dummy
)
3456 error (_("Illegal process-id: %s."), args
);
3458 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3459 error (_("This target does not support attaching to a process"));
3461 sprintf (rs
->buf
, "vAttach;%x", pid
);
3463 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3465 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
3468 printf_unfiltered (_("Attached to %s\n"),
3469 target_pid_to_str (pid_to_ptid (pid
)));
3473 /* Save the reply for later. */
3474 wait_status
= alloca (strlen (rs
->buf
) + 1);
3475 strcpy (wait_status
, rs
->buf
);
3477 else if (strcmp (rs
->buf
, "OK") != 0)
3478 error (_("Attaching to %s failed with: %s"),
3479 target_pid_to_str (pid_to_ptid (pid
)),
3482 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3483 error (_("This target does not support attaching to a process"));
3485 error (_("Attaching to %s failed"),
3486 target_pid_to_str (pid_to_ptid (pid
)));
3488 remote_add_inferior (pid
, 1);
3490 inferior_ptid
= pid_to_ptid (pid
);
3494 struct thread_info
*thread
;
3496 /* Get list of threads. */
3497 remote_threads_info (target
);
3499 thread
= first_thread_of_process (pid
);
3501 inferior_ptid
= thread
->ptid
;
3503 inferior_ptid
= pid_to_ptid (pid
);
3505 /* Invalidate our notion of the remote current thread. */
3506 record_currthread (minus_one_ptid
);
3510 /* Now, if we have thread information, update inferior_ptid. */
3511 inferior_ptid
= remote_current_thread (inferior_ptid
);
3513 /* Add the main thread to the thread list. */
3514 add_thread_silent (inferior_ptid
);
3517 /* Next, if the target can specify a description, read it. We do
3518 this before anything involving memory or registers. */
3519 target_find_description ();
3523 /* Use the previously fetched status. */
3524 gdb_assert (wait_status
!= NULL
);
3526 if (target_can_async_p ())
3528 struct stop_reply
*stop_reply
;
3529 struct cleanup
*old_chain
;
3531 stop_reply
= stop_reply_xmalloc ();
3532 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3533 remote_parse_stop_reply (wait_status
, stop_reply
);
3534 discard_cleanups (old_chain
);
3535 push_stop_reply (stop_reply
);
3537 target_async (inferior_event_handler
, 0);
3541 gdb_assert (wait_status
!= NULL
);
3542 strcpy (rs
->buf
, wait_status
);
3543 rs
->cached_wait_status
= 1;
3547 gdb_assert (wait_status
== NULL
);
3551 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3553 extended_remote_attach_1 (ops
, args
, from_tty
);
3556 /* Convert hex digit A to a number. */
3561 if (a
>= '0' && a
<= '9')
3563 else if (a
>= 'a' && a
<= 'f')
3564 return a
- 'a' + 10;
3565 else if (a
>= 'A' && a
<= 'F')
3566 return a
- 'A' + 10;
3568 error (_("Reply contains invalid hex digit %d"), a
);
3572 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
3576 for (i
= 0; i
< count
; i
++)
3578 if (hex
[0] == 0 || hex
[1] == 0)
3580 /* Hex string is short, or of uneven length.
3581 Return the count that has been converted so far. */
3584 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
3590 /* Convert number NIB to a hex digit. */
3598 return 'a' + nib
- 10;
3602 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
3605 /* May use a length, or a nul-terminated string as input. */
3607 count
= strlen ((char *) bin
);
3609 for (i
= 0; i
< count
; i
++)
3611 *hex
++ = tohex ((*bin
>> 4) & 0xf);
3612 *hex
++ = tohex (*bin
++ & 0xf);
3618 /* Check for the availability of vCont. This function should also check
3622 remote_vcont_probe (struct remote_state
*rs
)
3626 strcpy (rs
->buf
, "vCont?");
3628 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3631 /* Make sure that the features we assume are supported. */
3632 if (strncmp (buf
, "vCont", 5) == 0)
3635 int support_s
, support_S
, support_c
, support_C
;
3641 rs
->support_vCont_t
= 0;
3642 while (p
&& *p
== ';')
3645 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3647 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3649 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3651 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3653 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3654 rs
->support_vCont_t
= 1;
3656 p
= strchr (p
, ';');
3659 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3660 BUF will make packet_ok disable the packet. */
3661 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
3665 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
3668 /* Helper function for building "vCont" resumptions. Write a
3669 resumption to P. ENDP points to one-passed-the-end of the buffer
3670 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
3671 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
3672 resumed thread should be single-stepped and/or signalled. If PTID
3673 equals minus_one_ptid, then all threads are resumed; if PTID
3674 represents a process, then all threads of the process are resumed;
3675 the thread to be stepped and/or signalled is given in the global
3679 append_resumption (char *p
, char *endp
,
3680 ptid_t ptid
, int step
, enum target_signal siggnal
)
3682 struct remote_state
*rs
= get_remote_state ();
3684 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3685 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
3687 p
+= xsnprintf (p
, endp
- p
, ";s");
3688 else if (siggnal
!= TARGET_SIGNAL_0
)
3689 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
3691 p
+= xsnprintf (p
, endp
- p
, ";c");
3693 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
3697 /* All (-1) threads of process. */
3698 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3700 p
+= xsnprintf (p
, endp
- p
, ":");
3701 p
= write_ptid (p
, endp
, nptid
);
3703 else if (!ptid_equal (ptid
, minus_one_ptid
))
3705 p
+= xsnprintf (p
, endp
- p
, ":");
3706 p
= write_ptid (p
, endp
, ptid
);
3712 /* Resume the remote inferior by using a "vCont" packet. The thread
3713 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3714 resumed thread should be single-stepped and/or signalled. If PTID
3715 equals minus_one_ptid, then all threads are resumed; the thread to
3716 be stepped and/or signalled is given in the global INFERIOR_PTID.
3717 This function returns non-zero iff it resumes the inferior.
3719 This function issues a strict subset of all possible vCont commands at the
3723 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
3725 struct remote_state
*rs
= get_remote_state ();
3729 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3730 remote_vcont_probe (rs
);
3732 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
3736 endp
= rs
->buf
+ get_remote_packet_size ();
3738 /* If we could generate a wider range of packets, we'd have to worry
3739 about overflowing BUF. Should there be a generic
3740 "multi-part-packet" packet? */
3742 p
+= xsnprintf (p
, endp
- p
, "vCont");
3744 if (ptid_equal (ptid
, magic_null_ptid
))
3746 /* MAGIC_NULL_PTID means that we don't have any active threads,
3747 so we don't have any TID numbers the inferior will
3748 understand. Make sure to only send forms that do not specify
3750 p
= append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
3752 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
3754 /* Resume all threads (of all processes, or of a single
3755 process), with preference for INFERIOR_PTID. This assumes
3756 inferior_ptid belongs to the set of all threads we are about
3758 if (step
|| siggnal
!= TARGET_SIGNAL_0
)
3760 /* Step inferior_ptid, with or without signal. */
3761 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
3764 /* And continue others without a signal. */
3765 p
= append_resumption (p
, endp
, ptid
, /*step=*/ 0, TARGET_SIGNAL_0
);
3769 /* Scheduler locking; resume only PTID. */
3770 p
= append_resumption (p
, endp
, ptid
, step
, siggnal
);
3773 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
3778 /* In non-stop, the stub replies to vCont with "OK". The stop
3779 reply will be reported asynchronously by means of a `%Stop'
3781 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3782 if (strcmp (rs
->buf
, "OK") != 0)
3783 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
3789 /* Tell the remote machine to resume. */
3791 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
3793 static int last_sent_step
;
3796 remote_resume (struct target_ops
*ops
,
3797 ptid_t ptid
, int step
, enum target_signal siggnal
)
3799 struct remote_state
*rs
= get_remote_state ();
3802 last_sent_signal
= siggnal
;
3803 last_sent_step
= step
;
3805 /* Update the inferior on signals to silently pass, if they've changed. */
3806 remote_pass_signals ();
3808 /* The vCont packet doesn't need to specify threads via Hc. */
3809 if (remote_vcont_resume (ptid
, step
, siggnal
))
3812 /* All other supported resume packets do use Hc, so set the continue
3814 if (ptid_equal (ptid
, minus_one_ptid
))
3815 set_continue_thread (any_thread_ptid
);
3817 set_continue_thread (ptid
);
3820 if (execution_direction
== EXEC_REVERSE
)
3822 /* We don't pass signals to the target in reverse exec mode. */
3823 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
3824 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
3826 strcpy (buf
, step
? "bs" : "bc");
3828 else if (siggnal
!= TARGET_SIGNAL_0
)
3830 buf
[0] = step
? 'S' : 'C';
3831 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
3832 buf
[2] = tohex (((int) siggnal
) & 0xf);
3836 strcpy (buf
, step
? "s" : "c");
3841 /* We are about to start executing the inferior, let's register it
3842 with the event loop. NOTE: this is the one place where all the
3843 execution commands end up. We could alternatively do this in each
3844 of the execution commands in infcmd.c. */
3845 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3846 into infcmd.c in order to allow inferior function calls to work
3847 NOT asynchronously. */
3848 if (target_can_async_p ())
3849 target_async (inferior_event_handler
, 0);
3851 /* We've just told the target to resume. The remote server will
3852 wait for the inferior to stop, and then send a stop reply. In
3853 the mean time, we can't start another command/query ourselves
3854 because the stub wouldn't be ready to process it. This applies
3855 only to the base all-stop protocol, however. In non-stop (which
3856 only supports vCont), the stub replies with an "OK", and is
3857 immediate able to process further serial input. */
3859 rs
->waiting_for_stop_reply
= 1;
3863 /* Set up the signal handler for SIGINT, while the target is
3864 executing, ovewriting the 'regular' SIGINT signal handler. */
3866 initialize_sigint_signal_handler (void)
3868 signal (SIGINT
, handle_remote_sigint
);
3871 /* Signal handler for SIGINT, while the target is executing. */
3873 handle_remote_sigint (int sig
)
3875 signal (sig
, handle_remote_sigint_twice
);
3876 mark_async_signal_handler_wrapper (sigint_remote_token
);
3879 /* Signal handler for SIGINT, installed after SIGINT has already been
3880 sent once. It will take effect the second time that the user sends
3883 handle_remote_sigint_twice (int sig
)
3885 signal (sig
, handle_remote_sigint
);
3886 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
3889 /* Perform the real interruption of the target execution, in response
3892 async_remote_interrupt (gdb_client_data arg
)
3895 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
3897 target_stop (inferior_ptid
);
3900 /* Perform interrupt, if the first attempt did not succeed. Just give
3901 up on the target alltogether. */
3903 async_remote_interrupt_twice (gdb_client_data arg
)
3906 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
3911 /* Reinstall the usual SIGINT handlers, after the target has
3914 cleanup_sigint_signal_handler (void *dummy
)
3916 signal (SIGINT
, handle_sigint
);
3919 /* Send ^C to target to halt it. Target will respond, and send us a
3921 static void (*ofunc
) (int);
3923 /* The command line interface's stop routine. This function is installed
3924 as a signal handler for SIGINT. The first time a user requests a
3925 stop, we call remote_stop to send a break or ^C. If there is no
3926 response from the target (it didn't stop when the user requested it),
3927 we ask the user if he'd like to detach from the target. */
3929 remote_interrupt (int signo
)
3931 /* If this doesn't work, try more severe steps. */
3932 signal (signo
, remote_interrupt_twice
);
3934 gdb_call_async_signal_handler (sigint_remote_token
, 1);
3937 /* The user typed ^C twice. */
3940 remote_interrupt_twice (int signo
)
3942 signal (signo
, ofunc
);
3943 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
3944 signal (signo
, remote_interrupt
);
3947 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
3948 thread, all threads of a remote process, or all threads of all
3952 remote_stop_ns (ptid_t ptid
)
3954 struct remote_state
*rs
= get_remote_state ();
3956 char *endp
= rs
->buf
+ get_remote_packet_size ();
3957 struct stop_reply
*reply
, *next
;
3959 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3960 remote_vcont_probe (rs
);
3962 if (!rs
->support_vCont_t
)
3963 error (_("Remote server does not support stopping threads"));
3965 if (ptid_equal (ptid
, minus_one_ptid
)
3966 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
3967 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
3972 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
3974 if (ptid_is_pid (ptid
))
3975 /* All (-1) threads of process. */
3976 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3979 /* Small optimization: if we already have a stop reply for
3980 this thread, no use in telling the stub we want this
3982 if (peek_stop_reply (ptid
))
3988 p
= write_ptid (p
, endp
, nptid
);
3991 /* In non-stop, we get an immediate OK reply. The stop reply will
3992 come in asynchronously by notification. */
3994 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3995 if (strcmp (rs
->buf
, "OK") != 0)
3996 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
3999 /* All-stop version of target_stop. Sends a break or a ^C to stop the
4000 remote target. It is undefined which thread of which process
4001 reports the stop. */
4004 remote_stop_as (ptid_t ptid
)
4006 struct remote_state
*rs
= get_remote_state ();
4008 /* If the inferior is stopped already, but the core didn't know
4009 about it yet, just ignore the request. The cached wait status
4010 will be collected in remote_wait. */
4011 if (rs
->cached_wait_status
)
4014 /* Send a break or a ^C, depending on user preference. */
4017 serial_send_break (remote_desc
);
4019 serial_write (remote_desc
, "\003", 1);
4022 /* This is the generic stop called via the target vector. When a target
4023 interrupt is requested, either by the command line or the GUI, we
4024 will eventually end up here. */
4027 remote_stop (ptid_t ptid
)
4030 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
4033 remote_stop_ns (ptid
);
4035 remote_stop_as (ptid
);
4038 /* Ask the user what to do when an interrupt is received. */
4041 interrupt_query (void)
4043 target_terminal_ours ();
4045 if (target_can_async_p ())
4047 signal (SIGINT
, handle_sigint
);
4048 deprecated_throw_reason (RETURN_QUIT
);
4052 if (query (_("Interrupted while waiting for the program.\n\
4053 Give up (and stop debugging it)? ")))
4056 deprecated_throw_reason (RETURN_QUIT
);
4060 target_terminal_inferior ();
4063 /* Enable/disable target terminal ownership. Most targets can use
4064 terminal groups to control terminal ownership. Remote targets are
4065 different in that explicit transfer of ownership to/from GDB/target
4069 remote_terminal_inferior (void)
4071 if (!target_async_permitted
)
4072 /* Nothing to do. */
4075 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4076 idempotent. The event-loop GDB talking to an asynchronous target
4077 with a synchronous command calls this function from both
4078 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4079 transfer the terminal to the target when it shouldn't this guard
4081 if (!remote_async_terminal_ours_p
)
4083 delete_file_handler (input_fd
);
4084 remote_async_terminal_ours_p
= 0;
4085 initialize_sigint_signal_handler ();
4086 /* NOTE: At this point we could also register our selves as the
4087 recipient of all input. Any characters typed could then be
4088 passed on down to the target. */
4092 remote_terminal_ours (void)
4094 if (!target_async_permitted
)
4095 /* Nothing to do. */
4098 /* See FIXME in remote_terminal_inferior. */
4099 if (remote_async_terminal_ours_p
)
4101 cleanup_sigint_signal_handler (NULL
);
4102 add_file_handler (input_fd
, stdin_event_handler
, 0);
4103 remote_async_terminal_ours_p
= 1;
4107 remote_console_output (char *msg
)
4111 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4114 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4117 fputs_unfiltered (tb
, gdb_stdtarg
);
4119 gdb_flush (gdb_stdtarg
);
4122 typedef struct cached_reg
4125 gdb_byte data
[MAX_REGISTER_SIZE
];
4128 DEF_VEC_O(cached_reg_t
);
4132 struct stop_reply
*next
;
4136 struct target_waitstatus ws
;
4138 VEC(cached_reg_t
) *regcache
;
4140 int stopped_by_watchpoint_p
;
4141 CORE_ADDR watch_data_address
;
4147 /* The list of already fetched and acknowledged stop events. */
4148 static struct stop_reply
*stop_reply_queue
;
4150 static struct stop_reply
*
4151 stop_reply_xmalloc (void)
4153 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4159 stop_reply_xfree (struct stop_reply
*r
)
4163 VEC_free (cached_reg_t
, r
->regcache
);
4168 /* Discard all pending stop replies of inferior PID. If PID is -1,
4169 discard everything. */
4172 discard_pending_stop_replies (int pid
)
4174 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4176 /* Discard the in-flight notification. */
4177 if (pending_stop_reply
!= NULL
4179 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4181 stop_reply_xfree (pending_stop_reply
);
4182 pending_stop_reply
= NULL
;
4185 /* Discard the stop replies we have already pulled with
4187 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4191 || ptid_get_pid (reply
->ptid
) == pid
)
4193 if (reply
== stop_reply_queue
)
4194 stop_reply_queue
= reply
->next
;
4196 prev
->next
= reply
->next
;
4198 stop_reply_xfree (reply
);
4205 /* Cleanup wrapper. */
4208 do_stop_reply_xfree (void *arg
)
4210 struct stop_reply
*r
= arg
;
4211 stop_reply_xfree (r
);
4214 /* Look for a queued stop reply belonging to PTID. If one is found,
4215 remove it from the queue, and return it. Returns NULL if none is
4216 found. If there are still queued events left to process, tell the
4217 event loop to get back to target_wait soon. */
4219 static struct stop_reply
*
4220 queued_stop_reply (ptid_t ptid
)
4222 struct stop_reply
*it
, *prev
;
4223 struct stop_reply head
;
4225 head
.next
= stop_reply_queue
;
4230 if (!ptid_equal (ptid
, minus_one_ptid
))
4231 for (; it
; prev
= it
, it
= it
->next
)
4232 if (ptid_equal (ptid
, it
->ptid
))
4237 prev
->next
= it
->next
;
4241 stop_reply_queue
= head
.next
;
4243 if (stop_reply_queue
)
4244 /* There's still at least an event left. */
4245 mark_async_event_handler (remote_async_inferior_event_token
);
4250 /* Push a fully parsed stop reply in the stop reply queue. Since we
4251 know that we now have at least one queued event left to pass to the
4252 core side, tell the event loop to get back to target_wait soon. */
4255 push_stop_reply (struct stop_reply
*new_event
)
4257 struct stop_reply
*event
;
4259 if (stop_reply_queue
)
4261 for (event
= stop_reply_queue
;
4262 event
&& event
->next
;
4263 event
= event
->next
)
4266 event
->next
= new_event
;
4269 stop_reply_queue
= new_event
;
4271 mark_async_event_handler (remote_async_inferior_event_token
);
4274 /* Returns true if we have a stop reply for PTID. */
4277 peek_stop_reply (ptid_t ptid
)
4279 struct stop_reply
*it
;
4281 for (it
= stop_reply_queue
; it
; it
= it
->next
)
4282 if (ptid_equal (ptid
, it
->ptid
))
4284 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
4291 /* Parse the stop reply in BUF. Either the function succeeds, and the
4292 result is stored in EVENT, or throws an error. */
4295 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
4297 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4301 event
->ptid
= null_ptid
;
4302 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
4303 event
->ws
.value
.integer
= 0;
4304 event
->solibs_changed
= 0;
4305 event
->replay_event
= 0;
4306 event
->stopped_by_watchpoint_p
= 0;
4307 event
->regcache
= NULL
;
4311 case 'T': /* Status with PC, SP, FP, ... */
4313 gdb_byte regs
[MAX_REGISTER_SIZE
];
4315 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4316 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4318 n... = register number
4319 r... = register contents
4322 p
= &buf
[3]; /* after Txx */
4330 /* If the packet contains a register number, save it in
4331 pnum and set p1 to point to the character following it.
4332 Otherwise p1 points to p. */
4334 /* If this packet is an awatch packet, don't parse the 'a'
4335 as a register number. */
4337 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
4339 /* Read the ``P'' register number. */
4340 pnum
= strtol (p
, &p_temp
, 16);
4346 if (p1
== p
) /* No register number present here. */
4348 p1
= strchr (p
, ':');
4350 error (_("Malformed packet(a) (missing colon): %s\n\
4353 if (strncmp (p
, "thread", p1
- p
) == 0)
4354 event
->ptid
= read_ptid (++p1
, &p
);
4355 else if ((strncmp (p
, "watch", p1
- p
) == 0)
4356 || (strncmp (p
, "rwatch", p1
- p
) == 0)
4357 || (strncmp (p
, "awatch", p1
- p
) == 0))
4359 event
->stopped_by_watchpoint_p
= 1;
4360 p
= unpack_varlen_hex (++p1
, &addr
);
4361 event
->watch_data_address
= (CORE_ADDR
) addr
;
4363 else if (strncmp (p
, "library", p1
- p
) == 0)
4367 while (*p_temp
&& *p_temp
!= ';')
4370 event
->solibs_changed
= 1;
4373 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
4375 /* NO_HISTORY event.
4376 p1 will indicate "begin" or "end", but
4377 it makes no difference for now, so ignore it. */
4378 event
->replay_event
= 1;
4379 p_temp
= strchr (p1
+ 1, ';');
4385 /* Silently skip unknown optional info. */
4386 p_temp
= strchr (p1
+ 1, ';');
4393 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
4394 cached_reg_t cached_reg
;
4399 error (_("Malformed packet(b) (missing colon): %s\n\
4405 error (_("Remote sent bad register number %s: %s\n\
4407 phex_nz (pnum
, 0), p
, buf
);
4409 cached_reg
.num
= reg
->regnum
;
4411 fieldsize
= hex2bin (p
, cached_reg
.data
,
4412 register_size (target_gdbarch
,
4415 if (fieldsize
< register_size (target_gdbarch
,
4417 warning (_("Remote reply is too short: %s"), buf
);
4419 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
4423 error (_("Remote register badly formatted: %s\nhere: %s"),
4429 case 'S': /* Old style status, just signal only. */
4430 if (event
->solibs_changed
)
4431 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
4432 else if (event
->replay_event
)
4433 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
4436 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
4437 event
->ws
.value
.sig
= (enum target_signal
)
4438 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
4441 case 'W': /* Target exited. */
4448 /* GDB used to accept only 2 hex chars here. Stubs should
4449 only send more if they detect GDB supports multi-process
4451 p
= unpack_varlen_hex (&buf
[1], &value
);
4455 /* The remote process exited. */
4456 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
4457 event
->ws
.value
.integer
= value
;
4461 /* The remote process exited with a signal. */
4462 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
4463 event
->ws
.value
.sig
= (enum target_signal
) value
;
4466 /* If no process is specified, assume inferior_ptid. */
4467 pid
= ptid_get_pid (inferior_ptid
);
4476 else if (strncmp (p
,
4477 "process:", sizeof ("process:") - 1) == 0)
4480 p
+= sizeof ("process:") - 1;
4481 unpack_varlen_hex (p
, &upid
);
4485 error (_("unknown stop reply packet: %s"), buf
);
4488 error (_("unknown stop reply packet: %s"), buf
);
4489 event
->ptid
= pid_to_ptid (pid
);
4494 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
4495 error (_("No process or thread specified in stop reply: %s"), buf
);
4498 /* When the stub wants to tell GDB about a new stop reply, it sends a
4499 stop notification (%Stop). Those can come it at any time, hence,
4500 we have to make sure that any pending putpkt/getpkt sequence we're
4501 making is finished, before querying the stub for more events with
4502 vStopped. E.g., if we started a vStopped sequence immediatelly
4503 upon receiving the %Stop notification, something like this could
4511 1.6) <-- (registers reply to step #1.3)
4513 Obviously, the reply in step #1.6 would be unexpected to a vStopped
4516 To solve this, whenever we parse a %Stop notification sucessfully,
4517 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
4518 doing whatever we were doing:
4524 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
4525 2.5) <-- (registers reply to step #2.3)
4527 Eventualy after step #2.5, we return to the event loop, which
4528 notices there's an event on the
4529 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
4530 associated callback --- the function below. At this point, we're
4531 always safe to start a vStopped sequence. :
4534 2.7) <-- T05 thread:2
4540 remote_get_pending_stop_replies (void)
4542 struct remote_state
*rs
= get_remote_state ();
4545 if (pending_stop_reply
)
4548 putpkt ("vStopped");
4550 /* Now we can rely on it. */
4551 push_stop_reply (pending_stop_reply
);
4552 pending_stop_reply
= NULL
;
4556 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4557 if (strcmp (rs
->buf
, "OK") == 0)
4561 struct cleanup
*old_chain
;
4562 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
4564 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4565 remote_parse_stop_reply (rs
->buf
, stop_reply
);
4568 putpkt ("vStopped");
4570 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
4572 /* Now we can rely on it. */
4573 discard_cleanups (old_chain
);
4574 push_stop_reply (stop_reply
);
4577 /* We got an unknown stop reply. */
4578 do_cleanups (old_chain
);
4585 /* Called when it is decided that STOP_REPLY holds the info of the
4586 event that is to be returned to the core. This function always
4587 destroys STOP_REPLY. */
4590 process_stop_reply (struct stop_reply
*stop_reply
,
4591 struct target_waitstatus
*status
)
4595 *status
= stop_reply
->ws
;
4596 ptid
= stop_reply
->ptid
;
4598 /* If no thread/process was reported by the stub, assume the current
4600 if (ptid_equal (ptid
, null_ptid
))
4601 ptid
= inferior_ptid
;
4603 if (status
->kind
!= TARGET_WAITKIND_EXITED
4604 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4606 /* Expedited registers. */
4607 if (stop_reply
->regcache
)
4609 struct regcache
*regcache
4610 = get_thread_arch_regcache (ptid
, target_gdbarch
);
4615 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
4617 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
4618 VEC_free (cached_reg_t
, stop_reply
->regcache
);
4621 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
4622 remote_watch_data_address
= stop_reply
->watch_data_address
;
4624 remote_notice_new_inferior (ptid
, 0);
4627 stop_reply_xfree (stop_reply
);
4631 /* The non-stop mode version of target_wait. */
4634 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4636 struct remote_state
*rs
= get_remote_state ();
4637 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4638 ptid_t event_ptid
= null_ptid
;
4639 struct stop_reply
*stop_reply
;
4642 /* If in non-stop mode, get out of getpkt even if a
4643 notification is received. */
4645 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4652 case 'E': /* Error of some sort. */
4653 /* We're out of sync with the target now. Did it continue
4654 or not? We can't tell which thread it was in non-stop,
4655 so just ignore this. */
4656 warning (_("Remote failure reply: %s"), rs
->buf
);
4658 case 'O': /* Console output. */
4659 remote_console_output (rs
->buf
+ 1);
4662 warning (_("Invalid remote reply: %s"), rs
->buf
);
4666 /* Acknowledge a pending stop reply that may have arrived in the
4668 if (pending_stop_reply
!= NULL
)
4669 remote_get_pending_stop_replies ();
4671 /* If indeed we noticed a stop reply, we're done. */
4672 stop_reply
= queued_stop_reply (ptid
);
4673 if (stop_reply
!= NULL
)
4674 return process_stop_reply (stop_reply
, status
);
4676 /* Still no event. If we're just polling for an event, then
4677 return to the event loop. */
4678 if (options
& TARGET_WNOHANG
)
4680 status
->kind
= TARGET_WAITKIND_IGNORE
;
4681 return minus_one_ptid
;
4684 /* Otherwise do a blocking wait. */
4685 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4690 /* Wait until the remote machine stops, then return, storing status in
4691 STATUS just as `wait' would. */
4694 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4696 struct remote_state
*rs
= get_remote_state ();
4697 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4698 ptid_t event_ptid
= null_ptid
;
4700 int solibs_changed
= 0;
4702 struct stop_reply
*stop_reply
;
4706 status
->kind
= TARGET_WAITKIND_IGNORE
;
4707 status
->value
.integer
= 0;
4709 stop_reply
= queued_stop_reply (ptid
);
4710 if (stop_reply
!= NULL
)
4711 return process_stop_reply (stop_reply
, status
);
4713 if (rs
->cached_wait_status
)
4714 /* Use the cached wait status, but only once. */
4715 rs
->cached_wait_status
= 0;
4720 if (!target_is_async_p ())
4722 ofunc
= signal (SIGINT
, remote_interrupt
);
4723 /* If the user hit C-c before this packet, or between packets,
4724 pretend that it was hit right here. */
4728 remote_interrupt (SIGINT
);
4732 /* FIXME: cagney/1999-09-27: If we're in async mode we should
4733 _never_ wait for ever -> test on target_is_async_p().
4734 However, before we do that we need to ensure that the caller
4735 knows how to take the target into/out of async mode. */
4736 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
4737 if (!target_is_async_p ())
4738 signal (SIGINT
, ofunc
);
4743 remote_stopped_by_watchpoint_p
= 0;
4745 /* We got something. */
4746 rs
->waiting_for_stop_reply
= 0;
4750 case 'E': /* Error of some sort. */
4751 /* We're out of sync with the target now. Did it continue or
4752 not? Not is more likely, so report a stop. */
4753 warning (_("Remote failure reply: %s"), buf
);
4754 status
->kind
= TARGET_WAITKIND_STOPPED
;
4755 status
->value
.sig
= TARGET_SIGNAL_0
;
4757 case 'F': /* File-I/O request. */
4758 remote_fileio_request (buf
);
4760 case 'T': case 'S': case 'X': case 'W':
4762 struct stop_reply
*stop_reply
;
4763 struct cleanup
*old_chain
;
4765 stop_reply
= stop_reply_xmalloc ();
4766 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4767 remote_parse_stop_reply (buf
, stop_reply
);
4768 discard_cleanups (old_chain
);
4769 event_ptid
= process_stop_reply (stop_reply
, status
);
4772 case 'O': /* Console output. */
4773 remote_console_output (buf
+ 1);
4775 /* The target didn't really stop; keep waiting. */
4776 rs
->waiting_for_stop_reply
= 1;
4780 if (last_sent_signal
!= TARGET_SIGNAL_0
)
4782 /* Zero length reply means that we tried 'S' or 'C' and the
4783 remote system doesn't support it. */
4784 target_terminal_ours_for_output ();
4786 ("Can't send signals to this remote system. %s not sent.\n",
4787 target_signal_to_name (last_sent_signal
));
4788 last_sent_signal
= TARGET_SIGNAL_0
;
4789 target_terminal_inferior ();
4791 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
4792 putpkt ((char *) buf
);
4794 /* We just told the target to resume, so a stop reply is in
4796 rs
->waiting_for_stop_reply
= 1;
4799 /* else fallthrough */
4801 warning (_("Invalid remote reply: %s"), buf
);
4803 rs
->waiting_for_stop_reply
= 1;
4807 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
4809 /* Nothing interesting happened. If we're doing a non-blocking
4810 poll, we're done. Otherwise, go back to waiting. */
4811 if (options
& TARGET_WNOHANG
)
4812 return minus_one_ptid
;
4816 else if (status
->kind
!= TARGET_WAITKIND_EXITED
4817 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4819 if (!ptid_equal (event_ptid
, null_ptid
))
4820 record_currthread (event_ptid
);
4822 event_ptid
= inferior_ptid
;
4825 /* A process exit. Invalidate our notion of current thread. */
4826 record_currthread (minus_one_ptid
);
4831 /* Wait until the remote machine stops, then return, storing status in
4832 STATUS just as `wait' would. */
4835 remote_wait (struct target_ops
*ops
,
4836 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4841 event_ptid
= remote_wait_ns (ptid
, status
, options
);
4843 event_ptid
= remote_wait_as (ptid
, status
, options
);
4845 if (target_can_async_p ())
4847 /* If there are are events left in the queue tell the event loop
4849 if (stop_reply_queue
)
4850 mark_async_event_handler (remote_async_inferior_event_token
);
4856 /* Fetch a single register using a 'p' packet. */
4859 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
4861 struct remote_state
*rs
= get_remote_state ();
4863 char regp
[MAX_REGISTER_SIZE
];
4866 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
4869 if (reg
->pnum
== -1)
4874 p
+= hexnumstr (p
, reg
->pnum
);
4877 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4881 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
4885 case PACKET_UNKNOWN
:
4888 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
4889 gdbarch_register_name (get_regcache_arch (regcache
),
4894 /* If this register is unfetchable, tell the regcache. */
4897 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
4901 /* Otherwise, parse and supply the value. */
4907 error (_("fetch_register_using_p: early buf termination"));
4909 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4912 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
4916 /* Fetch the registers included in the target's 'g' packet. */
4919 send_g_packet (void)
4921 struct remote_state
*rs
= get_remote_state ();
4926 sprintf (rs
->buf
, "g");
4927 remote_send (&rs
->buf
, &rs
->buf_size
);
4929 /* We can get out of synch in various cases. If the first character
4930 in the buffer is not a hex character, assume that has happened
4931 and try to fetch another packet to read. */
4932 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
4933 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
4934 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
4935 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
4938 fprintf_unfiltered (gdb_stdlog
,
4939 "Bad register packet; fetching a new packet\n");
4940 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4943 buf_len
= strlen (rs
->buf
);
4945 /* Sanity check the received packet. */
4946 if (buf_len
% 2 != 0)
4947 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
4953 process_g_packet (struct regcache
*regcache
)
4955 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
4956 struct remote_state
*rs
= get_remote_state ();
4957 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4962 buf_len
= strlen (rs
->buf
);
4964 /* Further sanity checks, with knowledge of the architecture. */
4965 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
4966 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
4968 /* Save the size of the packet sent to us by the target. It is used
4969 as a heuristic when determining the max size of packets that the
4970 target can safely receive. */
4971 if (rsa
->actual_register_packet_size
== 0)
4972 rsa
->actual_register_packet_size
= buf_len
;
4974 /* If this is smaller than we guessed the 'g' packet would be,
4975 update our records. A 'g' reply that doesn't include a register's
4976 value implies either that the register is not available, or that
4977 the 'p' packet must be used. */
4978 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
4980 rsa
->sizeof_g_packet
= buf_len
/ 2;
4982 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4984 if (rsa
->regs
[i
].pnum
== -1)
4987 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
4988 rsa
->regs
[i
].in_g_packet
= 0;
4990 rsa
->regs
[i
].in_g_packet
= 1;
4994 regs
= alloca (rsa
->sizeof_g_packet
);
4996 /* Unimplemented registers read as all bits zero. */
4997 memset (regs
, 0, rsa
->sizeof_g_packet
);
4999 /* Reply describes registers byte by byte, each byte encoded as two
5000 hex characters. Suck them all up, then supply them to the
5001 register cacheing/storage mechanism. */
5004 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
5006 if (p
[0] == 0 || p
[1] == 0)
5007 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
5008 internal_error (__FILE__
, __LINE__
,
5009 "unexpected end of 'g' packet reply");
5011 if (p
[0] == 'x' && p
[1] == 'x')
5012 regs
[i
] = 0; /* 'x' */
5014 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5020 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5022 struct packet_reg
*r
= &rsa
->regs
[i
];
5025 if (r
->offset
* 2 >= strlen (rs
->buf
))
5026 /* This shouldn't happen - we adjusted in_g_packet above. */
5027 internal_error (__FILE__
, __LINE__
,
5028 "unexpected end of 'g' packet reply");
5029 else if (rs
->buf
[r
->offset
* 2] == 'x')
5031 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5032 /* The register isn't available, mark it as such (at
5033 the same time setting the value to zero). */
5034 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5037 regcache_raw_supply (regcache
, r
->regnum
,
5045 fetch_registers_using_g (struct regcache
*regcache
)
5048 process_g_packet (regcache
);
5052 remote_fetch_registers (struct target_ops
*ops
,
5053 struct regcache
*regcache
, int regnum
)
5055 struct remote_state
*rs
= get_remote_state ();
5056 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5059 set_general_thread (inferior_ptid
);
5063 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5064 gdb_assert (reg
!= NULL
);
5066 /* If this register might be in the 'g' packet, try that first -
5067 we are likely to read more than one register. If this is the
5068 first 'g' packet, we might be overly optimistic about its
5069 contents, so fall back to 'p'. */
5070 if (reg
->in_g_packet
)
5072 fetch_registers_using_g (regcache
);
5073 if (reg
->in_g_packet
)
5077 if (fetch_register_using_p (regcache
, reg
))
5080 /* This register is not available. */
5081 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5086 fetch_registers_using_g (regcache
);
5088 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5089 if (!rsa
->regs
[i
].in_g_packet
)
5090 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5092 /* This register is not available. */
5093 regcache_raw_supply (regcache
, i
, NULL
);
5097 /* Prepare to store registers. Since we may send them all (using a
5098 'G' request), we have to read out the ones we don't want to change
5102 remote_prepare_to_store (struct regcache
*regcache
)
5104 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5106 gdb_byte buf
[MAX_REGISTER_SIZE
];
5108 /* Make sure the entire registers array is valid. */
5109 switch (remote_protocol_packets
[PACKET_P
].support
)
5111 case PACKET_DISABLE
:
5112 case PACKET_SUPPORT_UNKNOWN
:
5113 /* Make sure all the necessary registers are cached. */
5114 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5115 if (rsa
->regs
[i
].in_g_packet
)
5116 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5123 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5124 packet was not recognized. */
5127 store_register_using_P (const struct regcache
*regcache
,
5128 struct packet_reg
*reg
)
5130 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5131 struct remote_state
*rs
= get_remote_state ();
5132 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5133 /* Try storing a single register. */
5134 char *buf
= rs
->buf
;
5135 gdb_byte regp
[MAX_REGISTER_SIZE
];
5138 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5141 if (reg
->pnum
== -1)
5144 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5145 p
= buf
+ strlen (buf
);
5146 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5147 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5149 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5151 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5156 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
5157 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
5158 case PACKET_UNKNOWN
:
5161 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5165 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5166 contents of the register cache buffer. FIXME: ignores errors. */
5169 store_registers_using_G (const struct regcache
*regcache
)
5171 struct remote_state
*rs
= get_remote_state ();
5172 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5176 /* Extract all the registers in the regcache copying them into a
5180 regs
= alloca (rsa
->sizeof_g_packet
);
5181 memset (regs
, 0, rsa
->sizeof_g_packet
);
5182 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5184 struct packet_reg
*r
= &rsa
->regs
[i
];
5186 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5190 /* Command describes registers byte by byte,
5191 each byte encoded as two hex characters. */
5194 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5196 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5198 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5199 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
5200 error (_("Could not write registers; remote failure reply '%s'"),
5204 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5205 of the register cache buffer. FIXME: ignores errors. */
5208 remote_store_registers (struct target_ops
*ops
,
5209 struct regcache
*regcache
, int regnum
)
5211 struct remote_state
*rs
= get_remote_state ();
5212 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5215 set_general_thread (inferior_ptid
);
5219 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5220 gdb_assert (reg
!= NULL
);
5222 /* Always prefer to store registers using the 'P' packet if
5223 possible; we often change only a small number of registers.
5224 Sometimes we change a larger number; we'd need help from a
5225 higher layer to know to use 'G'. */
5226 if (store_register_using_P (regcache
, reg
))
5229 /* For now, don't complain if we have no way to write the
5230 register. GDB loses track of unavailable registers too
5231 easily. Some day, this may be an error. We don't have
5232 any way to read the register, either... */
5233 if (!reg
->in_g_packet
)
5236 store_registers_using_G (regcache
);
5240 store_registers_using_G (regcache
);
5242 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5243 if (!rsa
->regs
[i
].in_g_packet
)
5244 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
5245 /* See above for why we do not issue an error here. */
5250 /* Return the number of hex digits in num. */
5253 hexnumlen (ULONGEST num
)
5257 for (i
= 0; num
!= 0; i
++)
5263 /* Set BUF to the minimum number of hex digits representing NUM. */
5266 hexnumstr (char *buf
, ULONGEST num
)
5268 int len
= hexnumlen (num
);
5269 return hexnumnstr (buf
, num
, len
);
5273 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5276 hexnumnstr (char *buf
, ULONGEST num
, int width
)
5282 for (i
= width
- 1; i
>= 0; i
--)
5284 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
5291 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5294 remote_address_masked (CORE_ADDR addr
)
5296 int address_size
= remote_address_size
;
5297 /* If "remoteaddresssize" was not set, default to target address size. */
5299 address_size
= gdbarch_addr_bit (target_gdbarch
);
5301 if (address_size
> 0
5302 && address_size
< (sizeof (ULONGEST
) * 8))
5304 /* Only create a mask when that mask can safely be constructed
5305 in a ULONGEST variable. */
5307 mask
= (mask
<< address_size
) - 1;
5313 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5314 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5315 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5316 (which may be more than *OUT_LEN due to escape characters). The
5317 total number of bytes in the output buffer will be at most
5321 remote_escape_output (const gdb_byte
*buffer
, int len
,
5322 gdb_byte
*out_buf
, int *out_len
,
5325 int input_index
, output_index
;
5328 for (input_index
= 0; input_index
< len
; input_index
++)
5330 gdb_byte b
= buffer
[input_index
];
5332 if (b
== '$' || b
== '#' || b
== '}')
5334 /* These must be escaped. */
5335 if (output_index
+ 2 > out_maxlen
)
5337 out_buf
[output_index
++] = '}';
5338 out_buf
[output_index
++] = b
^ 0x20;
5342 if (output_index
+ 1 > out_maxlen
)
5344 out_buf
[output_index
++] = b
;
5348 *out_len
= input_index
;
5349 return output_index
;
5352 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5353 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5354 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5356 This function reverses remote_escape_output. It allows more
5357 escaped characters than that function does, in particular because
5358 '*' must be escaped to avoid the run-length encoding processing
5359 in reading packets. */
5362 remote_unescape_input (const gdb_byte
*buffer
, int len
,
5363 gdb_byte
*out_buf
, int out_maxlen
)
5365 int input_index
, output_index
;
5370 for (input_index
= 0; input_index
< len
; input_index
++)
5372 gdb_byte b
= buffer
[input_index
];
5374 if (output_index
+ 1 > out_maxlen
)
5376 warning (_("Received too much data from remote target;"
5377 " ignoring overflow."));
5378 return output_index
;
5383 out_buf
[output_index
++] = b
^ 0x20;
5389 out_buf
[output_index
++] = b
;
5393 error (_("Unmatched escape character in target response."));
5395 return output_index
;
5398 /* Determine whether the remote target supports binary downloading.
5399 This is accomplished by sending a no-op memory write of zero length
5400 to the target at the specified address. It does not suffice to send
5401 the whole packet, since many stubs strip the eighth bit and
5402 subsequently compute a wrong checksum, which causes real havoc with
5405 NOTE: This can still lose if the serial line is not eight-bit
5406 clean. In cases like this, the user should clear "remote
5410 check_binary_download (CORE_ADDR addr
)
5412 struct remote_state
*rs
= get_remote_state ();
5414 switch (remote_protocol_packets
[PACKET_X
].support
)
5416 case PACKET_DISABLE
:
5420 case PACKET_SUPPORT_UNKNOWN
:
5426 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5428 p
+= hexnumstr (p
, (ULONGEST
) 0);
5432 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5433 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5435 if (rs
->buf
[0] == '\0')
5438 fprintf_unfiltered (gdb_stdlog
,
5439 "binary downloading NOT suppported by target\n");
5440 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
5445 fprintf_unfiltered (gdb_stdlog
,
5446 "binary downloading suppported by target\n");
5447 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
5454 /* Write memory data directly to the remote machine.
5455 This does not inform the data cache; the data cache uses this.
5456 HEADER is the starting part of the packet.
5457 MEMADDR is the address in the remote memory space.
5458 MYADDR is the address of the buffer in our space.
5459 LEN is the number of bytes.
5460 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
5461 should send data as binary ('X'), or hex-encoded ('M').
5463 The function creates packet of the form
5464 <HEADER><ADDRESS>,<LENGTH>:<DATA>
5466 where encoding of <DATA> is termined by PACKET_FORMAT.
5468 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
5471 Returns the number of bytes transferred, or 0 (setting errno) for
5472 error. Only transfer a single packet. */
5475 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
5476 const gdb_byte
*myaddr
, int len
,
5477 char packet_format
, int use_length
)
5479 struct remote_state
*rs
= get_remote_state ();
5489 if (packet_format
!= 'X' && packet_format
!= 'M')
5490 internal_error (__FILE__
, __LINE__
,
5491 "remote_write_bytes_aux: bad packet format");
5496 payload_size
= get_memory_write_packet_size ();
5498 /* The packet buffer will be large enough for the payload;
5499 get_memory_packet_size ensures this. */
5502 /* Compute the size of the actual payload by subtracting out the
5503 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
5505 payload_size
-= strlen ("$,:#NN");
5507 /* The comma won't be used. */
5509 header_length
= strlen (header
);
5510 payload_size
-= header_length
;
5511 payload_size
-= hexnumlen (memaddr
);
5513 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
5515 strcat (rs
->buf
, header
);
5516 p
= rs
->buf
+ strlen (header
);
5518 /* Compute a best guess of the number of bytes actually transfered. */
5519 if (packet_format
== 'X')
5521 /* Best guess at number of bytes that will fit. */
5522 todo
= min (len
, payload_size
);
5524 payload_size
-= hexnumlen (todo
);
5525 todo
= min (todo
, payload_size
);
5529 /* Num bytes that will fit. */
5530 todo
= min (len
, payload_size
/ 2);
5532 payload_size
-= hexnumlen (todo
);
5533 todo
= min (todo
, payload_size
/ 2);
5537 internal_error (__FILE__
, __LINE__
,
5538 _("minumum packet size too small to write data"));
5540 /* If we already need another packet, then try to align the end
5541 of this packet to a useful boundary. */
5542 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
5543 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
5545 /* Append "<memaddr>". */
5546 memaddr
= remote_address_masked (memaddr
);
5547 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5554 /* Append <len>. Retain the location/size of <len>. It may need to
5555 be adjusted once the packet body has been created. */
5557 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
5565 /* Append the packet body. */
5566 if (packet_format
== 'X')
5568 /* Binary mode. Send target system values byte by byte, in
5569 increasing byte addresses. Only escape certain critical
5571 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
5574 /* If not all TODO bytes fit, then we'll need another packet. Make
5575 a second try to keep the end of the packet aligned. Don't do
5576 this if the packet is tiny. */
5577 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
5581 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
5583 if (new_nr_bytes
!= nr_bytes
)
5584 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
5589 p
+= payload_length
;
5590 if (use_length
&& nr_bytes
< todo
)
5592 /* Escape chars have filled up the buffer prematurely,
5593 and we have actually sent fewer bytes than planned.
5594 Fix-up the length field of the packet. Use the same
5595 number of characters as before. */
5596 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
5597 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
5602 /* Normal mode: Send target system values byte by byte, in
5603 increasing byte addresses. Each byte is encoded as a two hex
5605 nr_bytes
= bin2hex (myaddr
, p
, todo
);
5609 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5610 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5612 if (rs
->buf
[0] == 'E')
5614 /* There is no correspondance between what the remote protocol
5615 uses for errors and errno codes. We would like a cleaner way
5616 of representing errors (big enough to include errno codes,
5617 bfd_error codes, and others). But for now just return EIO. */
5622 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
5623 fewer bytes than we'd planned. */
5627 /* Write memory data directly to the remote machine.
5628 This does not inform the data cache; the data cache uses this.
5629 MEMADDR is the address in the remote memory space.
5630 MYADDR is the address of the buffer in our space.
5631 LEN is the number of bytes.
5633 Returns number of bytes transferred, or 0 (setting errno) for
5634 error. Only transfer a single packet. */
5637 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
5639 char *packet_format
= 0;
5641 /* Check whether the target supports binary download. */
5642 check_binary_download (memaddr
);
5644 switch (remote_protocol_packets
[PACKET_X
].support
)
5647 packet_format
= "X";
5649 case PACKET_DISABLE
:
5650 packet_format
= "M";
5652 case PACKET_SUPPORT_UNKNOWN
:
5653 internal_error (__FILE__
, __LINE__
,
5654 _("remote_write_bytes: bad internal state"));
5656 internal_error (__FILE__
, __LINE__
, _("bad switch"));
5659 return remote_write_bytes_aux (packet_format
,
5660 memaddr
, myaddr
, len
, packet_format
[0], 1);
5663 /* Read memory data directly from the remote machine.
5664 This does not use the data cache; the data cache uses this.
5665 MEMADDR is the address in the remote memory space.
5666 MYADDR is the address of the buffer in our space.
5667 LEN is the number of bytes.
5669 Returns number of bytes transferred, or 0 for error. */
5671 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
5672 remote targets) shouldn't attempt to read the entire buffer.
5673 Instead it should read a single packet worth of data and then
5674 return the byte size of that packet to the caller. The caller (its
5675 caller and its callers caller ;-) already contains code for
5676 handling partial reads. */
5679 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
5681 struct remote_state
*rs
= get_remote_state ();
5682 int max_buf_size
; /* Max size of packet output buffer. */
5688 max_buf_size
= get_memory_read_packet_size ();
5689 /* The packet buffer will be large enough for the payload;
5690 get_memory_packet_size ensures this. */
5699 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
5701 /* construct "m"<memaddr>","<len>" */
5702 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
5703 memaddr
= remote_address_masked (memaddr
);
5706 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5708 p
+= hexnumstr (p
, (ULONGEST
) todo
);
5712 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5714 if (rs
->buf
[0] == 'E'
5715 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
5716 && rs
->buf
[3] == '\0')
5718 /* There is no correspondance between what the remote
5719 protocol uses for errors and errno codes. We would like
5720 a cleaner way of representing errors (big enough to
5721 include errno codes, bfd_error codes, and others). But
5722 for now just return EIO. */
5727 /* Reply describes memory byte by byte,
5728 each byte encoded as two hex characters. */
5731 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
5733 /* Reply is short. This means that we were able to read
5734 only part of what we wanted to. */
5735 return i
+ (origlen
- len
);
5745 /* Remote notification handler. */
5748 handle_notification (char *buf
, size_t length
)
5750 if (strncmp (buf
, "Stop:", 5) == 0)
5752 if (pending_stop_reply
)
5753 /* We've already parsed the in-flight stop-reply, but the stub
5754 for some reason thought we didn't, possibly due to timeout
5755 on its side. Just ignore it. */
5759 struct cleanup
*old_chain
;
5760 struct stop_reply
*reply
= stop_reply_xmalloc ();
5761 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
5763 remote_parse_stop_reply (buf
+ 5, reply
);
5765 discard_cleanups (old_chain
);
5767 /* Be careful to only set it after parsing, since an error
5768 may be thrown then. */
5769 pending_stop_reply
= reply
;
5771 /* Notify the event loop there's a stop reply to acknowledge
5772 and that there may be more events to fetch. */
5773 mark_async_event_handler (remote_async_get_pending_events_token
);
5777 /* We ignore notifications we don't recognize, for compatibility
5778 with newer stubs. */
5783 /* Read or write LEN bytes from inferior memory at MEMADDR,
5784 transferring to or from debugger address BUFFER. Write to inferior
5785 if SHOULD_WRITE is nonzero. Returns length of data written or
5786 read; 0 for error. TARGET is unused. */
5789 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
5790 int should_write
, struct mem_attrib
*attrib
,
5791 struct target_ops
*target
)
5795 set_general_thread (inferior_ptid
);
5798 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
5800 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
5805 /* Sends a packet with content determined by the printf format string
5806 FORMAT and the remaining arguments, then gets the reply. Returns
5807 whether the packet was a success, a failure, or unknown. */
5809 static enum packet_result
5810 remote_send_printf (const char *format
, ...)
5812 struct remote_state
*rs
= get_remote_state ();
5813 int max_size
= get_remote_packet_size ();
5816 va_start (ap
, format
);
5819 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
5820 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
5822 if (putpkt (rs
->buf
) < 0)
5823 error (_("Communication problem with target."));
5826 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5828 return packet_check_result (rs
->buf
);
5832 restore_remote_timeout (void *p
)
5834 int value
= *(int *)p
;
5835 remote_timeout
= value
;
5838 /* Flash writing can take quite some time. We'll set
5839 effectively infinite timeout for flash operations.
5840 In future, we'll need to decide on a better approach. */
5841 static const int remote_flash_timeout
= 1000;
5844 remote_flash_erase (struct target_ops
*ops
,
5845 ULONGEST address
, LONGEST length
)
5847 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
5848 int saved_remote_timeout
= remote_timeout
;
5849 enum packet_result ret
;
5851 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5852 &saved_remote_timeout
);
5853 remote_timeout
= remote_flash_timeout
;
5855 ret
= remote_send_printf ("vFlashErase:%s,%s",
5856 phex (address
, addr_size
),
5860 case PACKET_UNKNOWN
:
5861 error (_("Remote target does not support flash erase"));
5863 error (_("Error erasing flash with vFlashErase packet"));
5868 do_cleanups (back_to
);
5872 remote_flash_write (struct target_ops
*ops
,
5873 ULONGEST address
, LONGEST length
,
5874 const gdb_byte
*data
)
5876 int saved_remote_timeout
= remote_timeout
;
5878 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5879 &saved_remote_timeout
);
5881 remote_timeout
= remote_flash_timeout
;
5882 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
5883 do_cleanups (back_to
);
5889 remote_flash_done (struct target_ops
*ops
)
5891 int saved_remote_timeout
= remote_timeout
;
5893 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5894 &saved_remote_timeout
);
5896 remote_timeout
= remote_flash_timeout
;
5897 ret
= remote_send_printf ("vFlashDone");
5898 do_cleanups (back_to
);
5902 case PACKET_UNKNOWN
:
5903 error (_("Remote target does not support vFlashDone"));
5905 error (_("Error finishing flash operation"));
5912 remote_files_info (struct target_ops
*ignore
)
5914 puts_filtered ("Debugging a target over a serial line.\n");
5917 /* Stuff for dealing with the packets which are part of this protocol.
5918 See comment at top of file for details. */
5920 /* Read a single character from the remote end. */
5923 readchar (int timeout
)
5927 ch
= serial_readchar (remote_desc
, timeout
);
5932 switch ((enum serial_rc
) ch
)
5936 error (_("Remote connection closed"));
5939 perror_with_name (_("Remote communication error"));
5941 case SERIAL_TIMEOUT
:
5947 /* Send the command in *BUF to the remote machine, and read the reply
5948 into *BUF. Report an error if we get an error reply. Resize
5949 *BUF using xrealloc if necessary to hold the result, and update
5953 remote_send (char **buf
,
5957 getpkt (buf
, sizeof_buf
, 0);
5959 if ((*buf
)[0] == 'E')
5960 error (_("Remote failure reply: %s"), *buf
);
5963 /* Return a pointer to an xmalloc'ed string representing an escaped
5964 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
5965 etc. The caller is responsible for releasing the returned
5969 escape_buffer (const char *buf
, int n
)
5971 struct cleanup
*old_chain
;
5972 struct ui_file
*stb
;
5976 stb
= mem_fileopen ();
5977 old_chain
= make_cleanup_ui_file_delete (stb
);
5979 fputstrn_unfiltered (buf
, n
, 0, stb
);
5980 str
= ui_file_xstrdup (stb
, &length
);
5981 do_cleanups (old_chain
);
5985 /* Display a null-terminated packet on stdout, for debugging, using C
5989 print_packet (char *buf
)
5991 puts_filtered ("\"");
5992 fputstr_filtered (buf
, '"', gdb_stdout
);
5993 puts_filtered ("\"");
5999 return putpkt_binary (buf
, strlen (buf
));
6002 /* Send a packet to the remote machine, with error checking. The data
6003 of the packet is in BUF. The string in BUF can be at most
6004 get_remote_packet_size () - 5 to account for the $, # and checksum,
6005 and for a possible /0 if we are debugging (remote_debug) and want
6006 to print the sent packet as a string. */
6009 putpkt_binary (char *buf
, int cnt
)
6011 struct remote_state
*rs
= get_remote_state ();
6013 unsigned char csum
= 0;
6014 char *buf2
= alloca (cnt
+ 6);
6020 /* Catch cases like trying to read memory or listing threads while
6021 we're waiting for a stop reply. The remote server wouldn't be
6022 ready to handle this request, so we'd hang and timeout. We don't
6023 have to worry about this in synchronous mode, because in that
6024 case it's not possible to issue a command while the target is
6025 running. This is not a problem in non-stop mode, because in that
6026 case, the stub is always ready to process serial input. */
6027 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
6028 error (_("Cannot execute this command while the target is running."));
6030 /* We're sending out a new packet. Make sure we don't look at a
6031 stale cached response. */
6032 rs
->cached_wait_status
= 0;
6034 /* Copy the packet into buffer BUF2, encapsulating it
6035 and giving it a checksum. */
6040 for (i
= 0; i
< cnt
; i
++)
6046 *p
++ = tohex ((csum
>> 4) & 0xf);
6047 *p
++ = tohex (csum
& 0xf);
6049 /* Send it over and over until we get a positive ack. */
6053 int started_error_output
= 0;
6057 struct cleanup
*old_chain
;
6061 str
= escape_buffer (buf2
, p
- buf2
);
6062 old_chain
= make_cleanup (xfree
, str
);
6063 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
6064 gdb_flush (gdb_stdlog
);
6065 do_cleanups (old_chain
);
6067 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6068 perror_with_name (_("putpkt: write failed"));
6070 /* If this is a no acks version of the remote protocol, send the
6071 packet and move on. */
6075 /* Read until either a timeout occurs (-2) or '+' is read.
6076 Handle any notification that arrives in the mean time. */
6079 ch
= readchar (remote_timeout
);
6087 case SERIAL_TIMEOUT
:
6090 if (started_error_output
)
6092 putchar_unfiltered ('\n');
6093 started_error_output
= 0;
6102 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6106 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6107 case SERIAL_TIMEOUT
:
6111 break; /* Retransmit buffer. */
6115 fprintf_unfiltered (gdb_stdlog
,
6116 "Packet instead of Ack, ignoring it\n");
6117 /* It's probably an old response sent because an ACK
6118 was lost. Gobble up the packet and ack it so it
6119 doesn't get retransmitted when we resend this
6122 serial_write (remote_desc
, "+", 1);
6123 continue; /* Now, go look for +. */
6130 /* If we got a notification, handle it, and go back to looking
6132 /* We've found the start of a notification. Now
6133 collect the data. */
6134 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6139 struct cleanup
*old_chain
;
6142 str
= escape_buffer (rs
->buf
, val
);
6143 old_chain
= make_cleanup (xfree
, str
);
6144 fprintf_unfiltered (gdb_stdlog
,
6145 " Notification received: %s\n",
6147 do_cleanups (old_chain
);
6149 handle_notification (rs
->buf
, val
);
6150 /* We're in sync now, rewait for the ack. */
6157 if (!started_error_output
)
6159 started_error_output
= 1;
6160 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6162 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6163 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6172 if (!started_error_output
)
6174 started_error_output
= 1;
6175 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6177 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6181 break; /* Here to retransmit. */
6185 /* This is wrong. If doing a long backtrace, the user should be
6186 able to get out next time we call QUIT, without anything as
6187 violent as interrupt_query. If we want to provide a way out of
6188 here without getting to the next QUIT, it should be based on
6189 hitting ^C twice as in remote_wait. */
6200 /* Come here after finding the start of a frame when we expected an
6201 ack. Do our best to discard the rest of this packet. */
6210 c
= readchar (remote_timeout
);
6213 case SERIAL_TIMEOUT
:
6214 /* Nothing we can do. */
6217 /* Discard the two bytes of checksum and stop. */
6218 c
= readchar (remote_timeout
);
6220 c
= readchar (remote_timeout
);
6223 case '*': /* Run length encoding. */
6224 /* Discard the repeat count. */
6225 c
= readchar (remote_timeout
);
6230 /* A regular character. */
6236 /* Come here after finding the start of the frame. Collect the rest
6237 into *BUF, verifying the checksum, length, and handling run-length
6238 compression. NUL terminate the buffer. If there is not enough room,
6239 expand *BUF using xrealloc.
6241 Returns -1 on error, number of characters in buffer (ignoring the
6242 trailing NULL) on success. (could be extended to return one of the
6243 SERIAL status indications). */
6246 read_frame (char **buf_p
,
6253 struct remote_state
*rs
= get_remote_state ();
6260 c
= readchar (remote_timeout
);
6263 case SERIAL_TIMEOUT
:
6265 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
6269 fputs_filtered ("Saw new packet start in middle of old one\n",
6271 return -1; /* Start a new packet, count retries. */
6274 unsigned char pktcsum
;
6280 check_0
= readchar (remote_timeout
);
6282 check_1
= readchar (remote_timeout
);
6284 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
6287 fputs_filtered ("Timeout in checksum, retrying\n",
6291 else if (check_0
< 0 || check_1
< 0)
6294 fputs_filtered ("Communication error in checksum\n",
6299 /* Don't recompute the checksum; with no ack packets we
6300 don't have any way to indicate a packet retransmission
6305 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
6306 if (csum
== pktcsum
)
6311 struct cleanup
*old_chain
;
6314 str
= escape_buffer (buf
, bc
);
6315 old_chain
= make_cleanup (xfree
, str
);
6316 fprintf_unfiltered (gdb_stdlog
,
6318 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6319 pktcsum
, csum
, str
);
6320 do_cleanups (old_chain
);
6322 /* Number of characters in buffer ignoring trailing
6326 case '*': /* Run length encoding. */
6331 c
= readchar (remote_timeout
);
6333 repeat
= c
- ' ' + 3; /* Compute repeat count. */
6335 /* The character before ``*'' is repeated. */
6337 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
6339 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
6341 /* Make some more room in the buffer. */
6342 *sizeof_buf
+= repeat
;
6343 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6347 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
6353 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
6357 if (bc
>= *sizeof_buf
- 1)
6359 /* Make some more room in the buffer. */
6361 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6372 /* Read a packet from the remote machine, with error checking, and
6373 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6374 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6375 rather than timing out; this is used (in synchronous mode) to wait
6376 for a target that is is executing user code to stop. */
6377 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6378 don't have to change all the calls to getpkt to deal with the
6379 return value, because at the moment I don't know what the right
6380 thing to do it for those. */
6388 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
6392 /* Read a packet from the remote machine, with error checking, and
6393 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6394 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6395 rather than timing out; this is used (in synchronous mode) to wait
6396 for a target that is is executing user code to stop. If FOREVER ==
6397 0, this function is allowed to time out gracefully and return an
6398 indication of this to the caller. Otherwise return the number of
6399 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6400 enough reason to return to the caller. */
6403 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
6404 int expecting_notif
)
6406 struct remote_state
*rs
= get_remote_state ();
6412 /* We're reading a new response. Make sure we don't look at a
6413 previously cached response. */
6414 rs
->cached_wait_status
= 0;
6416 strcpy (*buf
, "timeout");
6419 timeout
= watchdog
> 0 ? watchdog
: -1;
6420 else if (expecting_notif
)
6421 timeout
= 0; /* There should already be a char in the buffer. If
6424 timeout
= remote_timeout
;
6428 /* Process any number of notifications, and then return when
6432 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
6434 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
6436 /* This can loop forever if the remote side sends us
6437 characters continuously, but if it pauses, we'll get
6438 SERIAL_TIMEOUT from readchar because of timeout. Then
6439 we'll count that as a retry.
6441 Note that even when forever is set, we will only wait
6442 forever prior to the start of a packet. After that, we
6443 expect characters to arrive at a brisk pace. They should
6444 show up within remote_timeout intervals. */
6446 c
= readchar (timeout
);
6447 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
6449 if (c
== SERIAL_TIMEOUT
)
6451 if (expecting_notif
)
6452 return -1; /* Don't complain, it's normal to not get
6453 anything in this case. */
6455 if (forever
) /* Watchdog went off? Kill the target. */
6459 error (_("Watchdog timeout has expired. Target detached."));
6462 fputs_filtered ("Timed out.\n", gdb_stdlog
);
6466 /* We've found the start of a packet or notification.
6467 Now collect the data. */
6468 val
= read_frame (buf
, sizeof_buf
);
6473 serial_write (remote_desc
, "-", 1);
6476 if (tries
> MAX_TRIES
)
6478 /* We have tried hard enough, and just can't receive the
6479 packet/notification. Give up. */
6480 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
6482 /* Skip the ack char if we're in no-ack mode. */
6483 if (!rs
->noack_mode
)
6484 serial_write (remote_desc
, "+", 1);
6488 /* If we got an ordinary packet, return that to our caller. */
6493 struct cleanup
*old_chain
;
6496 str
= escape_buffer (*buf
, val
);
6497 old_chain
= make_cleanup (xfree
, str
);
6498 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
6499 do_cleanups (old_chain
);
6502 /* Skip the ack char if we're in no-ack mode. */
6503 if (!rs
->noack_mode
)
6504 serial_write (remote_desc
, "+", 1);
6508 /* If we got a notification, handle it, and go back to looking
6512 gdb_assert (c
== '%');
6516 struct cleanup
*old_chain
;
6519 str
= escape_buffer (*buf
, val
);
6520 old_chain
= make_cleanup (xfree
, str
);
6521 fprintf_unfiltered (gdb_stdlog
,
6522 " Notification received: %s\n",
6524 do_cleanups (old_chain
);
6527 handle_notification (*buf
, val
);
6529 /* Notifications require no acknowledgement. */
6531 if (expecting_notif
)
6538 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
6540 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
6544 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
6546 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
6551 remote_kill (struct target_ops
*ops
)
6553 /* Use catch_errors so the user can quit from gdb even when we
6554 aren't on speaking terms with the remote system. */
6555 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
6557 /* Don't wait for it to die. I'm not really sure it matters whether
6558 we do or not. For the existing stubs, kill is a noop. */
6559 target_mourn_inferior ();
6563 remote_vkill (int pid
, struct remote_state
*rs
)
6565 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6568 /* Tell the remote target to detach. */
6569 sprintf (rs
->buf
, "vKill;%x", pid
);
6571 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6573 if (packet_ok (rs
->buf
,
6574 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
6576 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6583 extended_remote_kill (struct target_ops
*ops
)
6586 int pid
= ptid_get_pid (inferior_ptid
);
6587 struct remote_state
*rs
= get_remote_state ();
6589 res
= remote_vkill (pid
, rs
);
6590 if (res
== -1 && !remote_multi_process_p (rs
))
6592 /* Don't try 'k' on a multi-process aware stub -- it has no way
6593 to specify the pid. */
6597 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6598 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
6601 /* Don't wait for it to die. I'm not really sure it matters whether
6602 we do or not. For the existing stubs, kill is a noop. */
6608 error (_("Can't kill process"));
6610 target_mourn_inferior ();
6614 remote_mourn (struct target_ops
*ops
)
6616 remote_mourn_1 (ops
);
6619 /* Worker function for remote_mourn. */
6621 remote_mourn_1 (struct target_ops
*target
)
6623 unpush_target (target
);
6625 /* remote_close takes care of doing most of the clean up. */
6626 generic_mourn_inferior ();
6630 extended_remote_mourn_1 (struct target_ops
*target
)
6632 struct remote_state
*rs
= get_remote_state ();
6634 /* In case we got here due to an error, but we're going to stay
6636 rs
->waiting_for_stop_reply
= 0;
6638 /* We're no longer interested in these events. */
6639 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
6641 /* If the current general thread belonged to the process we just
6642 detached from or has exited, the remote side current general
6643 thread becomes undefined. Considering a case like this:
6645 - We just got here due to a detach.
6646 - The process that we're detaching from happens to immediately
6647 report a global breakpoint being hit in non-stop mode, in the
6648 same thread we had selected before.
6649 - GDB attaches to this process again.
6650 - This event happens to be the next event we handle.
6652 GDB would consider that the current general thread didn't need to
6653 be set on the stub side (with Hg), since for all it knew,
6654 GENERAL_THREAD hadn't changed.
6656 Notice that although in all-stop mode, the remote server always
6657 sets the current thread to the thread reporting the stop event,
6658 that doesn't happen in non-stop mode; in non-stop, the stub *must
6659 not* change the current thread when reporting a breakpoint hit,
6660 due to the decoupling of event reporting and event handling.
6662 To keep things simple, we always invalidate our notion of the
6664 record_currthread (minus_one_ptid
);
6666 /* Unlike "target remote", we do not want to unpush the target; then
6667 the next time the user says "run", we won't be connected. */
6669 /* Call common code to mark the inferior as not running. */
6670 generic_mourn_inferior ();
6672 if (!have_inferiors ())
6674 if (!remote_multi_process_p (rs
))
6676 /* Check whether the target is running now - some remote stubs
6677 automatically restart after kill. */
6679 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6681 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
6683 /* Assume that the target has been restarted. Set inferior_ptid
6684 so that bits of core GDB realizes there's something here, e.g.,
6685 so that the user can say "kill" again. */
6686 inferior_ptid
= magic_null_ptid
;
6693 extended_remote_mourn (struct target_ops
*ops
)
6695 extended_remote_mourn_1 (ops
);
6699 extended_remote_run (char *args
)
6701 struct remote_state
*rs
= get_remote_state ();
6705 /* If the user has disabled vRun support, or we have detected that
6706 support is not available, do not try it. */
6707 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6710 strcpy (rs
->buf
, "vRun;");
6711 len
= strlen (rs
->buf
);
6713 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
6714 error (_("Remote file name too long for run packet"));
6715 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
6717 gdb_assert (args
!= NULL
);
6720 struct cleanup
*back_to
;
6724 argv
= gdb_buildargv (args
);
6725 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
6726 for (i
= 0; argv
[i
] != NULL
; i
++)
6728 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
6729 error (_("Argument list too long for run packet"));
6730 rs
->buf
[len
++] = ';';
6731 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
6733 do_cleanups (back_to
);
6736 rs
->buf
[len
++] = '\0';
6739 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6741 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
6743 /* We have a wait response; we don't need it, though. All is well. */
6746 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6747 /* It wasn't disabled before, but it is now. */
6751 if (remote_exec_file
[0] == '\0')
6752 error (_("Running the default executable on the remote target failed; "
6753 "try \"set remote exec-file\"?"));
6755 error (_("Running \"%s\" on the remote target failed"),
6760 /* In the extended protocol we want to be able to do things like
6761 "run" and have them basically work as expected. So we need
6762 a special create_inferior function. We support changing the
6763 executable file and the command line arguments, but not the
6767 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
6768 char **env
, int from_tty
)
6770 /* If running asynchronously, register the target file descriptor
6771 with the event loop. */
6772 if (target_can_async_p ())
6773 target_async (inferior_event_handler
, 0);
6775 /* Now restart the remote server. */
6776 if (extended_remote_run (args
) == -1)
6778 /* vRun was not supported. Fail if we need it to do what the
6780 if (remote_exec_file
[0])
6781 error (_("Remote target does not support \"set remote exec-file\""));
6783 error (_("Remote target does not support \"set args\" or run <ARGS>"));
6785 /* Fall back to "R". */
6786 extended_remote_restart ();
6789 /* Clean up from the last time we ran, before we mark the target
6790 running again. This will mark breakpoints uninserted, and
6791 get_offsets may insert breakpoints. */
6792 init_thread_list ();
6793 init_wait_for_inferior ();
6795 /* Now mark the inferior as running before we do anything else. */
6796 inferior_ptid
= magic_null_ptid
;
6798 /* Now, if we have thread information, update inferior_ptid. */
6799 inferior_ptid
= remote_current_thread (inferior_ptid
);
6801 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
6802 add_thread_silent (inferior_ptid
);
6804 /* Get updated offsets, if the stub uses qOffsets. */
6809 extended_remote_create_inferior (struct target_ops
*ops
,
6810 char *exec_file
, char *args
,
6811 char **env
, int from_tty
)
6813 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
6817 /* Insert a breakpoint. On targets that have software breakpoint
6818 support, we ask the remote target to do the work; on targets
6819 which don't, we insert a traditional memory breakpoint. */
6822 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
6823 struct bp_target_info
*bp_tgt
)
6825 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
6826 If it succeeds, then set the support to PACKET_ENABLE. If it
6827 fails, and the user has explicitly requested the Z support then
6828 report an error, otherwise, mark it disabled and go on. */
6830 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6832 CORE_ADDR addr
= bp_tgt
->placed_address
;
6833 struct remote_state
*rs
;
6837 gdbarch_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
6839 rs
= get_remote_state ();
6845 addr
= (ULONGEST
) remote_address_masked (addr
);
6846 p
+= hexnumstr (p
, addr
);
6847 sprintf (p
, ",%d", bpsize
);
6850 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6852 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
6857 bp_tgt
->placed_address
= addr
;
6858 bp_tgt
->placed_size
= bpsize
;
6860 case PACKET_UNKNOWN
:
6865 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
6869 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
6870 struct bp_target_info
*bp_tgt
)
6872 CORE_ADDR addr
= bp_tgt
->placed_address
;
6873 struct remote_state
*rs
= get_remote_state ();
6876 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6884 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
6885 p
+= hexnumstr (p
, addr
);
6886 sprintf (p
, ",%d", bp_tgt
->placed_size
);
6889 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6891 return (rs
->buf
[0] == 'E');
6894 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
6898 watchpoint_to_Z_packet (int type
)
6903 return Z_PACKET_WRITE_WP
;
6906 return Z_PACKET_READ_WP
;
6909 return Z_PACKET_ACCESS_WP
;
6912 internal_error (__FILE__
, __LINE__
,
6913 _("hw_bp_to_z: bad watchpoint type %d"), type
);
6918 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
6920 struct remote_state
*rs
= get_remote_state ();
6922 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6924 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6927 sprintf (rs
->buf
, "Z%x,", packet
);
6928 p
= strchr (rs
->buf
, '\0');
6929 addr
= remote_address_masked (addr
);
6930 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6931 sprintf (p
, ",%x", len
);
6934 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6936 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6939 case PACKET_UNKNOWN
:
6944 internal_error (__FILE__
, __LINE__
,
6945 _("remote_insert_watchpoint: reached end of function"));
6950 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
6952 struct remote_state
*rs
= get_remote_state ();
6954 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6956 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6959 sprintf (rs
->buf
, "z%x,", packet
);
6960 p
= strchr (rs
->buf
, '\0');
6961 addr
= remote_address_masked (addr
);
6962 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6963 sprintf (p
, ",%x", len
);
6965 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6967 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6970 case PACKET_UNKNOWN
:
6975 internal_error (__FILE__
, __LINE__
,
6976 _("remote_remove_watchpoint: reached end of function"));
6980 int remote_hw_watchpoint_limit
= -1;
6981 int remote_hw_breakpoint_limit
= -1;
6984 remote_check_watch_resources (int type
, int cnt
, int ot
)
6986 if (type
== bp_hardware_breakpoint
)
6988 if (remote_hw_breakpoint_limit
== 0)
6990 else if (remote_hw_breakpoint_limit
< 0)
6992 else if (cnt
<= remote_hw_breakpoint_limit
)
6997 if (remote_hw_watchpoint_limit
== 0)
6999 else if (remote_hw_watchpoint_limit
< 0)
7003 else if (cnt
<= remote_hw_watchpoint_limit
)
7010 remote_stopped_by_watchpoint (void)
7012 return remote_stopped_by_watchpoint_p
;
7016 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
7019 if (remote_stopped_by_watchpoint ())
7021 *addr_p
= remote_watch_data_address
;
7030 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7031 struct bp_target_info
*bp_tgt
)
7034 struct remote_state
*rs
;
7037 /* The length field should be set to the size of a breakpoint
7038 instruction, even though we aren't inserting one ourselves. */
7040 gdbarch_breakpoint_from_pc
7041 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7043 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7046 rs
= get_remote_state ();
7053 addr
= remote_address_masked (bp_tgt
->placed_address
);
7054 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7055 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7058 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7060 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7063 case PACKET_UNKNOWN
:
7068 internal_error (__FILE__
, __LINE__
,
7069 _("remote_insert_hw_breakpoint: reached end of function"));
7074 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7075 struct bp_target_info
*bp_tgt
)
7078 struct remote_state
*rs
= get_remote_state ();
7081 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7088 addr
= remote_address_masked (bp_tgt
->placed_address
);
7089 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7090 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7093 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7095 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7098 case PACKET_UNKNOWN
:
7103 internal_error (__FILE__
, __LINE__
,
7104 _("remote_remove_hw_breakpoint: reached end of function"));
7107 /* Table used by the crc32 function to calcuate the checksum. */
7109 static unsigned long crc32_table
[256] =
7112 static unsigned long
7113 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
7115 if (!crc32_table
[1])
7117 /* Initialize the CRC table and the decoding table. */
7121 for (i
= 0; i
< 256; i
++)
7123 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7124 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7131 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7137 /* compare-sections command
7139 With no arguments, compares each loadable section in the exec bfd
7140 with the same memory range on the target, and reports mismatches.
7141 Useful for verifying the image on the target against the exec file.
7142 Depends on the target understanding the new "qCRC:" request. */
7144 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7145 target method (target verify memory) and generic version of the
7146 actual command. This will allow other high-level code (especially
7147 generic_load()) to make use of this target functionality. */
7150 compare_sections_command (char *args
, int from_tty
)
7152 struct remote_state
*rs
= get_remote_state ();
7154 unsigned long host_crc
, target_crc
;
7155 struct cleanup
*old_chain
;
7158 const char *sectname
;
7165 error (_("command cannot be used without an exec file"));
7166 if (!current_target
.to_shortname
||
7167 strcmp (current_target
.to_shortname
, "remote") != 0)
7168 error (_("command can only be used with remote target"));
7170 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7172 if (!(s
->flags
& SEC_LOAD
))
7173 continue; /* skip non-loadable section */
7175 size
= bfd_get_section_size (s
);
7177 continue; /* skip zero-length section */
7179 sectname
= bfd_get_section_name (exec_bfd
, s
);
7180 if (args
&& strcmp (args
, sectname
) != 0)
7181 continue; /* not the section selected by user */
7183 matched
= 1; /* do this section */
7185 /* FIXME: assumes lma can fit into long. */
7186 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7187 (long) lma
, (long) size
);
7190 /* Be clever; compute the host_crc before waiting for target
7192 sectdata
= xmalloc (size
);
7193 old_chain
= make_cleanup (xfree
, sectdata
);
7194 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7195 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
7197 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7198 if (rs
->buf
[0] == 'E')
7199 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
7200 paddress (target_gdbarch
, lma
),
7201 paddress (target_gdbarch
, lma
+ size
));
7202 if (rs
->buf
[0] != 'C')
7203 error (_("remote target does not support this operation"));
7205 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7206 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7208 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
7209 paddress (target_gdbarch
, lma
),
7210 paddress (target_gdbarch
, lma
+ size
));
7211 if (host_crc
== target_crc
)
7212 printf_filtered ("matched.\n");
7215 printf_filtered ("MIS-MATCHED!\n");
7219 do_cleanups (old_chain
);
7222 warning (_("One or more sections of the remote executable does not match\n\
7223 the loaded file\n"));
7224 if (args
&& !matched
)
7225 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7228 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7229 into remote target. The number of bytes written to the remote
7230 target is returned, or -1 for error. */
7233 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7234 const char *annex
, const gdb_byte
*writebuf
,
7235 ULONGEST offset
, LONGEST len
,
7236 struct packet_config
*packet
)
7241 struct remote_state
*rs
= get_remote_state ();
7242 int max_size
= get_memory_write_packet_size ();
7244 if (packet
->support
== PACKET_DISABLE
)
7247 /* Insert header. */
7248 i
= snprintf (rs
->buf
, max_size
,
7249 "qXfer:%s:write:%s:%s:",
7250 object_name
, annex
? annex
: "",
7251 phex_nz (offset
, sizeof offset
));
7252 max_size
-= (i
+ 1);
7254 /* Escape as much data as fits into rs->buf. */
7255 buf_len
= remote_escape_output
7256 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
7258 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
7259 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7260 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7263 unpack_varlen_hex (rs
->buf
, &n
);
7267 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7268 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7269 number of bytes read is returned, or 0 for EOF, or -1 for error.
7270 The number of bytes read may be less than LEN without indicating an
7271 EOF. PACKET is checked and updated to indicate whether the remote
7272 target supports this object. */
7275 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
7277 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
7278 struct packet_config
*packet
)
7280 static char *finished_object
;
7281 static char *finished_annex
;
7282 static ULONGEST finished_offset
;
7284 struct remote_state
*rs
= get_remote_state ();
7285 unsigned int total
= 0;
7286 LONGEST i
, n
, packet_len
;
7288 if (packet
->support
== PACKET_DISABLE
)
7291 /* Check whether we've cached an end-of-object packet that matches
7293 if (finished_object
)
7295 if (strcmp (object_name
, finished_object
) == 0
7296 && strcmp (annex
? annex
: "", finished_annex
) == 0
7297 && offset
== finished_offset
)
7300 /* Otherwise, we're now reading something different. Discard
7302 xfree (finished_object
);
7303 xfree (finished_annex
);
7304 finished_object
= NULL
;
7305 finished_annex
= NULL
;
7308 /* Request only enough to fit in a single packet. The actual data
7309 may not, since we don't know how much of it will need to be escaped;
7310 the target is free to respond with slightly less data. We subtract
7311 five to account for the response type and the protocol frame. */
7312 n
= min (get_remote_packet_size () - 5, len
);
7313 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7314 object_name
, annex
? annex
: "",
7315 phex_nz (offset
, sizeof offset
),
7316 phex_nz (n
, sizeof n
));
7317 i
= putpkt (rs
->buf
);
7322 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
7323 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7326 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
7327 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
7329 /* 'm' means there is (or at least might be) more data after this
7330 batch. That does not make sense unless there's at least one byte
7331 of data in this reply. */
7332 if (rs
->buf
[0] == 'm' && packet_len
== 1)
7333 error (_("Remote qXfer reply contained no data."));
7335 /* Got some data. */
7336 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
7338 /* 'l' is an EOF marker, possibly including a final block of data,
7339 or possibly empty. If we have the final block of a non-empty
7340 object, record this fact to bypass a subsequent partial read. */
7341 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
7343 finished_object
= xstrdup (object_name
);
7344 finished_annex
= xstrdup (annex
? annex
: "");
7345 finished_offset
= offset
+ i
;
7352 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
7353 const char *annex
, gdb_byte
*readbuf
,
7354 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
7356 struct remote_state
*rs
;
7361 set_general_thread (inferior_ptid
);
7363 rs
= get_remote_state ();
7365 /* Handle memory using the standard memory routines. */
7366 if (object
== TARGET_OBJECT_MEMORY
)
7371 /* If the remote target is connected but not running, we should
7372 pass this request down to a lower stratum (e.g. the executable
7374 if (!target_has_execution
)
7377 if (writebuf
!= NULL
)
7378 xfered
= remote_write_bytes (offset
, writebuf
, len
);
7380 xfered
= remote_read_bytes (offset
, readbuf
, len
);
7384 else if (xfered
== 0 && errno
== 0)
7390 /* Handle SPU memory using qxfer packets. */
7391 if (object
== TARGET_OBJECT_SPU
)
7394 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
7395 &remote_protocol_packets
7396 [PACKET_qXfer_spu_read
]);
7398 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
7399 &remote_protocol_packets
7400 [PACKET_qXfer_spu_write
]);
7403 /* Handle extra signal info using qxfer packets. */
7404 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
7407 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
7408 &remote_protocol_packets
7409 [PACKET_qXfer_siginfo_read
]);
7411 return remote_write_qxfer (ops
, "siginfo", annex
, writebuf
, offset
, len
,
7412 &remote_protocol_packets
7413 [PACKET_qXfer_siginfo_write
]);
7416 /* Only handle flash writes. */
7417 if (writebuf
!= NULL
)
7423 case TARGET_OBJECT_FLASH
:
7424 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
7428 else if (xfered
== 0 && errno
== 0)
7438 /* Map pre-existing objects onto letters. DO NOT do this for new
7439 objects!!! Instead specify new query packets. */
7442 case TARGET_OBJECT_AVR
:
7446 case TARGET_OBJECT_AUXV
:
7447 gdb_assert (annex
== NULL
);
7448 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
7449 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
7451 case TARGET_OBJECT_AVAILABLE_FEATURES
:
7452 return remote_read_qxfer
7453 (ops
, "features", annex
, readbuf
, offset
, len
,
7454 &remote_protocol_packets
[PACKET_qXfer_features
]);
7456 case TARGET_OBJECT_LIBRARIES
:
7457 return remote_read_qxfer
7458 (ops
, "libraries", annex
, readbuf
, offset
, len
,
7459 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
7461 case TARGET_OBJECT_MEMORY_MAP
:
7462 gdb_assert (annex
== NULL
);
7463 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
7464 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
7466 case TARGET_OBJECT_OSDATA
:
7467 /* Should only get here if we're connected. */
7468 gdb_assert (remote_desc
);
7469 return remote_read_qxfer
7470 (ops
, "osdata", annex
, readbuf
, offset
, len
,
7471 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
7477 /* Note: a zero OFFSET and LEN can be used to query the minimum
7479 if (offset
== 0 && len
== 0)
7480 return (get_remote_packet_size ());
7481 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7482 large enough let the caller deal with it. */
7483 if (len
< get_remote_packet_size ())
7485 len
= get_remote_packet_size ();
7487 /* Except for querying the minimum buffer size, target must be open. */
7489 error (_("remote query is only available after target open"));
7491 gdb_assert (annex
!= NULL
);
7492 gdb_assert (readbuf
!= NULL
);
7498 /* We used one buffer char for the remote protocol q command and
7499 another for the query type. As the remote protocol encapsulation
7500 uses 4 chars plus one extra in case we are debugging
7501 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7504 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
7506 /* Bad caller may have sent forbidden characters. */
7507 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
7512 gdb_assert (annex
[i
] == '\0');
7514 i
= putpkt (rs
->buf
);
7518 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7519 strcpy ((char *) readbuf
, rs
->buf
);
7521 return strlen ((char *) readbuf
);
7525 remote_search_memory (struct target_ops
* ops
,
7526 CORE_ADDR start_addr
, ULONGEST search_space_len
,
7527 const gdb_byte
*pattern
, ULONGEST pattern_len
,
7528 CORE_ADDR
*found_addrp
)
7530 int addr_size
= gdbarch_addr_bit (target_gdbarch
) / 8;
7531 struct remote_state
*rs
= get_remote_state ();
7532 int max_size
= get_memory_write_packet_size ();
7533 struct packet_config
*packet
=
7534 &remote_protocol_packets
[PACKET_qSearch_memory
];
7535 /* number of packet bytes used to encode the pattern,
7536 this could be more than PATTERN_LEN due to escape characters */
7537 int escaped_pattern_len
;
7538 /* amount of pattern that was encodable in the packet */
7539 int used_pattern_len
;
7542 ULONGEST found_addr
;
7544 /* Don't go to the target if we don't have to.
7545 This is done before checking packet->support to avoid the possibility that
7546 a success for this edge case means the facility works in general. */
7547 if (pattern_len
> search_space_len
)
7549 if (pattern_len
== 0)
7551 *found_addrp
= start_addr
;
7555 /* If we already know the packet isn't supported, fall back to the simple
7556 way of searching memory. */
7558 if (packet
->support
== PACKET_DISABLE
)
7560 /* Target doesn't provided special support, fall back and use the
7561 standard support (copy memory and do the search here). */
7562 return simple_search_memory (ops
, start_addr
, search_space_len
,
7563 pattern
, pattern_len
, found_addrp
);
7566 /* Insert header. */
7567 i
= snprintf (rs
->buf
, max_size
,
7568 "qSearch:memory:%s;%s;",
7569 phex_nz (start_addr
, addr_size
),
7570 phex_nz (search_space_len
, sizeof (search_space_len
)));
7571 max_size
-= (i
+ 1);
7573 /* Escape as much data as fits into rs->buf. */
7574 escaped_pattern_len
=
7575 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
7576 &used_pattern_len
, max_size
);
7578 /* Bail if the pattern is too large. */
7579 if (used_pattern_len
!= pattern_len
)
7580 error ("Pattern is too large to transmit to remote target.");
7582 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
7583 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7584 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7586 /* The request may not have worked because the command is not
7587 supported. If so, fall back to the simple way. */
7588 if (packet
->support
== PACKET_DISABLE
)
7590 return simple_search_memory (ops
, start_addr
, search_space_len
,
7591 pattern
, pattern_len
, found_addrp
);
7596 if (rs
->buf
[0] == '0')
7598 else if (rs
->buf
[0] == '1')
7601 if (rs
->buf
[1] != ',')
7602 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7603 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
7604 *found_addrp
= found_addr
;
7607 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7613 remote_rcmd (char *command
,
7614 struct ui_file
*outbuf
)
7616 struct remote_state
*rs
= get_remote_state ();
7620 error (_("remote rcmd is only available after target open"));
7622 /* Send a NULL command across as an empty command. */
7623 if (command
== NULL
)
7626 /* The query prefix. */
7627 strcpy (rs
->buf
, "qRcmd,");
7628 p
= strchr (rs
->buf
, '\0');
7630 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
7631 error (_("\"monitor\" command ``%s'' is too long."), command
);
7633 /* Encode the actual command. */
7634 bin2hex ((gdb_byte
*) command
, p
, 0);
7636 if (putpkt (rs
->buf
) < 0)
7637 error (_("Communication problem with target."));
7639 /* get/display the response */
7644 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
7646 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7649 error (_("Target does not support this command."));
7650 if (buf
[0] == 'O' && buf
[1] != 'K')
7652 remote_console_output (buf
+ 1); /* 'O' message from stub. */
7655 if (strcmp (buf
, "OK") == 0)
7657 if (strlen (buf
) == 3 && buf
[0] == 'E'
7658 && isdigit (buf
[1]) && isdigit (buf
[2]))
7660 error (_("Protocol error with Rcmd"));
7662 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
7664 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
7665 fputc_unfiltered (c
, outbuf
);
7671 static VEC(mem_region_s
) *
7672 remote_memory_map (struct target_ops
*ops
)
7674 VEC(mem_region_s
) *result
= NULL
;
7675 char *text
= target_read_stralloc (¤t_target
,
7676 TARGET_OBJECT_MEMORY_MAP
, NULL
);
7680 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
7681 result
= parse_memory_map (text
);
7682 do_cleanups (back_to
);
7689 packet_command (char *args
, int from_tty
)
7691 struct remote_state
*rs
= get_remote_state ();
7694 error (_("command can only be used with remote target"));
7697 error (_("remote-packet command requires packet text as argument"));
7699 puts_filtered ("sending: ");
7700 print_packet (args
);
7701 puts_filtered ("\n");
7704 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7705 puts_filtered ("received: ");
7706 print_packet (rs
->buf
);
7707 puts_filtered ("\n");
7711 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
7713 static void display_thread_info (struct gdb_ext_thread_info
*info
);
7715 static void threadset_test_cmd (char *cmd
, int tty
);
7717 static void threadalive_test (char *cmd
, int tty
);
7719 static void threadlist_test_cmd (char *cmd
, int tty
);
7721 int get_and_display_threadinfo (threadref
*ref
);
7723 static void threadinfo_test_cmd (char *cmd
, int tty
);
7725 static int thread_display_step (threadref
*ref
, void *context
);
7727 static void threadlist_update_test_cmd (char *cmd
, int tty
);
7729 static void init_remote_threadtests (void);
7731 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
7734 threadset_test_cmd (char *cmd
, int tty
)
7736 int sample_thread
= SAMPLE_THREAD
;
7738 printf_filtered (_("Remote threadset test\n"));
7739 set_general_thread (sample_thread
);
7744 threadalive_test (char *cmd
, int tty
)
7746 int sample_thread
= SAMPLE_THREAD
;
7747 int pid
= ptid_get_pid (inferior_ptid
);
7748 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
7750 if (remote_thread_alive (ptid
))
7751 printf_filtered ("PASS: Thread alive test\n");
7753 printf_filtered ("FAIL: Thread alive test\n");
7756 void output_threadid (char *title
, threadref
*ref
);
7759 output_threadid (char *title
, threadref
*ref
)
7763 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
7765 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
7769 threadlist_test_cmd (char *cmd
, int tty
)
7772 threadref nextthread
;
7773 int done
, result_count
;
7774 threadref threadlist
[3];
7776 printf_filtered ("Remote Threadlist test\n");
7777 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
7778 &result_count
, &threadlist
[0]))
7779 printf_filtered ("FAIL: threadlist test\n");
7782 threadref
*scan
= threadlist
;
7783 threadref
*limit
= scan
+ result_count
;
7785 while (scan
< limit
)
7786 output_threadid (" thread ", scan
++);
7791 display_thread_info (struct gdb_ext_thread_info
*info
)
7793 output_threadid ("Threadid: ", &info
->threadid
);
7794 printf_filtered ("Name: %s\n ", info
->shortname
);
7795 printf_filtered ("State: %s\n", info
->display
);
7796 printf_filtered ("other: %s\n\n", info
->more_display
);
7800 get_and_display_threadinfo (threadref
*ref
)
7804 struct gdb_ext_thread_info threadinfo
;
7806 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
7807 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
7808 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
7809 display_thread_info (&threadinfo
);
7814 threadinfo_test_cmd (char *cmd
, int tty
)
7816 int athread
= SAMPLE_THREAD
;
7820 int_to_threadref (&thread
, athread
);
7821 printf_filtered ("Remote Threadinfo test\n");
7822 if (!get_and_display_threadinfo (&thread
))
7823 printf_filtered ("FAIL cannot get thread info\n");
7827 thread_display_step (threadref
*ref
, void *context
)
7829 /* output_threadid(" threadstep ",ref); *//* simple test */
7830 return get_and_display_threadinfo (ref
);
7834 threadlist_update_test_cmd (char *cmd
, int tty
)
7836 printf_filtered ("Remote Threadlist update test\n");
7837 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
7841 init_remote_threadtests (void)
7843 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
7844 Fetch and print the remote list of thread identifiers, one pkt only"));
7845 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
7846 _("Fetch and display info about one thread"));
7847 add_com ("tset", class_obscure
, threadset_test_cmd
,
7848 _("Test setting to a different thread"));
7849 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
7850 _("Iterate through updating all remote thread info"));
7851 add_com ("talive", class_obscure
, threadalive_test
,
7852 _(" Remote thread alive test "));
7857 /* Convert a thread ID to a string. Returns the string in a static
7861 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
7863 static char buf
[64];
7864 struct remote_state
*rs
= get_remote_state ();
7866 if (ptid_equal (magic_null_ptid
, ptid
))
7868 xsnprintf (buf
, sizeof buf
, "Thread <main>");
7871 else if (remote_multi_process_p (rs
)
7872 && ptid_get_tid (ptid
) != 0 && ptid_get_pid (ptid
) != 0)
7874 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
7875 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
7878 else if (ptid_get_tid (ptid
) != 0)
7880 xsnprintf (buf
, sizeof buf
, "Thread %ld",
7881 ptid_get_tid (ptid
));
7885 return normal_pid_to_str (ptid
);
7888 /* Get the address of the thread local variable in OBJFILE which is
7889 stored at OFFSET within the thread local storage for thread PTID. */
7892 remote_get_thread_local_address (struct target_ops
*ops
,
7893 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
7895 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
7897 struct remote_state
*rs
= get_remote_state ();
7899 char *endp
= rs
->buf
+ get_remote_packet_size ();
7900 enum packet_result result
;
7902 strcpy (p
, "qGetTLSAddr:");
7904 p
= write_ptid (p
, endp
, ptid
);
7906 p
+= hexnumstr (p
, offset
);
7908 p
+= hexnumstr (p
, lm
);
7912 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7913 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
7914 if (result
== PACKET_OK
)
7918 unpack_varlen_hex (rs
->buf
, &result
);
7921 else if (result
== PACKET_UNKNOWN
)
7922 throw_error (TLS_GENERIC_ERROR
,
7923 _("Remote target doesn't support qGetTLSAddr packet"));
7925 throw_error (TLS_GENERIC_ERROR
,
7926 _("Remote target failed to process qGetTLSAddr request"));
7929 throw_error (TLS_GENERIC_ERROR
,
7930 _("TLS not supported or disabled on this target"));
7935 /* Support for inferring a target description based on the current
7936 architecture and the size of a 'g' packet. While the 'g' packet
7937 can have any size (since optional registers can be left off the
7938 end), some sizes are easily recognizable given knowledge of the
7939 approximate architecture. */
7941 struct remote_g_packet_guess
7944 const struct target_desc
*tdesc
;
7946 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
7947 DEF_VEC_O(remote_g_packet_guess_s
);
7949 struct remote_g_packet_data
7951 VEC(remote_g_packet_guess_s
) *guesses
;
7954 static struct gdbarch_data
*remote_g_packet_data_handle
;
7957 remote_g_packet_data_init (struct obstack
*obstack
)
7959 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
7963 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
7964 const struct target_desc
*tdesc
)
7966 struct remote_g_packet_data
*data
7967 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
7968 struct remote_g_packet_guess new_guess
, *guess
;
7971 gdb_assert (tdesc
!= NULL
);
7974 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7976 if (guess
->bytes
== bytes
)
7977 internal_error (__FILE__
, __LINE__
,
7978 "Duplicate g packet description added for size %d",
7981 new_guess
.bytes
= bytes
;
7982 new_guess
.tdesc
= tdesc
;
7983 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
7986 /* Return 1 if remote_read_description would do anything on this target
7987 and architecture, 0 otherwise. */
7990 remote_read_description_p (struct target_ops
*target
)
7992 struct remote_g_packet_data
*data
7993 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7995 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8001 static const struct target_desc
*
8002 remote_read_description (struct target_ops
*target
)
8004 struct remote_g_packet_data
*data
8005 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
8007 /* Do not try this during initial connection, when we do not know
8008 whether there is a running but stopped thread. */
8009 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
8012 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
8014 struct remote_g_packet_guess
*guess
;
8016 int bytes
= send_g_packet ();
8019 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
8021 if (guess
->bytes
== bytes
)
8022 return guess
->tdesc
;
8024 /* We discard the g packet. A minor optimization would be to
8025 hold on to it, and fill the register cache once we have selected
8026 an architecture, but it's too tricky to do safely. */
8032 /* Remote file transfer support. This is host-initiated I/O, not
8033 target-initiated; for target-initiated, see remote-fileio.c. */
8035 /* If *LEFT is at least the length of STRING, copy STRING to
8036 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8037 decrease *LEFT. Otherwise raise an error. */
8040 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8042 int len
= strlen (string
);
8045 error (_("Packet too long for target."));
8047 memcpy (*buffer
, string
, len
);
8051 /* NUL-terminate the buffer as a convenience, if there is
8057 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8058 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8059 decrease *LEFT. Otherwise raise an error. */
8062 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8065 if (2 * len
> *left
)
8066 error (_("Packet too long for target."));
8068 bin2hex (bytes
, *buffer
, len
);
8072 /* NUL-terminate the buffer as a convenience, if there is
8078 /* If *LEFT is large enough, convert VALUE to hex and add it to
8079 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8080 decrease *LEFT. Otherwise raise an error. */
8083 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8085 int len
= hexnumlen (value
);
8088 error (_("Packet too long for target."));
8090 hexnumstr (*buffer
, value
);
8094 /* NUL-terminate the buffer as a convenience, if there is
8100 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8101 value, *REMOTE_ERRNO to the remote error number or zero if none
8102 was included, and *ATTACHMENT to point to the start of the annex
8103 if any. The length of the packet isn't needed here; there may
8104 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8106 Return 0 if the packet could be parsed, -1 if it could not. If
8107 -1 is returned, the other variables may not be initialized. */
8110 remote_hostio_parse_result (char *buffer
, int *retcode
,
8111 int *remote_errno
, char **attachment
)
8118 if (buffer
[0] != 'F')
8122 *retcode
= strtol (&buffer
[1], &p
, 16);
8123 if (errno
!= 0 || p
== &buffer
[1])
8126 /* Check for ",errno". */
8130 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8131 if (errno
!= 0 || p
+ 1 == p2
)
8136 /* Check for ";attachment". If there is no attachment, the
8137 packet should end here. */
8140 *attachment
= p
+ 1;
8143 else if (*p
== '\0')
8149 /* Send a prepared I/O packet to the target and read its response.
8150 The prepared packet is in the global RS->BUF before this function
8151 is called, and the answer is there when we return.
8153 COMMAND_BYTES is the length of the request to send, which may include
8154 binary data. WHICH_PACKET is the packet configuration to check
8155 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8156 is set to the error number and -1 is returned. Otherwise the value
8157 returned by the function is returned.
8159 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8160 attachment is expected; an error will be reported if there's a
8161 mismatch. If one is found, *ATTACHMENT will be set to point into
8162 the packet buffer and *ATTACHMENT_LEN will be set to the
8163 attachment's length. */
8166 remote_hostio_send_command (int command_bytes
, int which_packet
,
8167 int *remote_errno
, char **attachment
,
8168 int *attachment_len
)
8170 struct remote_state
*rs
= get_remote_state ();
8171 int ret
, bytes_read
;
8172 char *attachment_tmp
;
8175 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
8177 *remote_errno
= FILEIO_ENOSYS
;
8181 putpkt_binary (rs
->buf
, command_bytes
);
8182 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8184 /* If it timed out, something is wrong. Don't try to parse the
8188 *remote_errno
= FILEIO_EINVAL
;
8192 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
8195 *remote_errno
= FILEIO_EINVAL
;
8197 case PACKET_UNKNOWN
:
8198 *remote_errno
= FILEIO_ENOSYS
;
8204 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
8207 *remote_errno
= FILEIO_EINVAL
;
8211 /* Make sure we saw an attachment if and only if we expected one. */
8212 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
8213 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
8215 *remote_errno
= FILEIO_EINVAL
;
8219 /* If an attachment was found, it must point into the packet buffer;
8220 work out how many bytes there were. */
8221 if (attachment_tmp
!= NULL
)
8223 *attachment
= attachment_tmp
;
8224 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
8230 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8231 remote file descriptor, or -1 if an error occurs (and set
8235 remote_hostio_open (const char *filename
, int flags
, int mode
,
8238 struct remote_state
*rs
= get_remote_state ();
8240 int left
= get_remote_packet_size () - 1;
8242 remote_buffer_add_string (&p
, &left
, "vFile:open:");
8244 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8246 remote_buffer_add_string (&p
, &left
, ",");
8248 remote_buffer_add_int (&p
, &left
, flags
);
8249 remote_buffer_add_string (&p
, &left
, ",");
8251 remote_buffer_add_int (&p
, &left
, mode
);
8253 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
8254 remote_errno
, NULL
, NULL
);
8257 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8258 Return the number of bytes written, or -1 if an error occurs (and
8259 set *REMOTE_ERRNO). */
8262 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
8263 ULONGEST offset
, int *remote_errno
)
8265 struct remote_state
*rs
= get_remote_state ();
8267 int left
= get_remote_packet_size ();
8270 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
8272 remote_buffer_add_int (&p
, &left
, fd
);
8273 remote_buffer_add_string (&p
, &left
, ",");
8275 remote_buffer_add_int (&p
, &left
, offset
);
8276 remote_buffer_add_string (&p
, &left
, ",");
8278 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
8279 get_remote_packet_size () - (p
- rs
->buf
));
8281 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
8282 remote_errno
, NULL
, NULL
);
8285 /* Read up to LEN bytes FD on the remote target into READ_BUF
8286 Return the number of bytes read, or -1 if an error occurs (and
8287 set *REMOTE_ERRNO). */
8290 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
8291 ULONGEST offset
, int *remote_errno
)
8293 struct remote_state
*rs
= get_remote_state ();
8296 int left
= get_remote_packet_size ();
8297 int ret
, attachment_len
;
8300 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
8302 remote_buffer_add_int (&p
, &left
, fd
);
8303 remote_buffer_add_string (&p
, &left
, ",");
8305 remote_buffer_add_int (&p
, &left
, len
);
8306 remote_buffer_add_string (&p
, &left
, ",");
8308 remote_buffer_add_int (&p
, &left
, offset
);
8310 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
8311 remote_errno
, &attachment
,
8317 read_len
= remote_unescape_input (attachment
, attachment_len
,
8319 if (read_len
!= ret
)
8320 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
8325 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8326 (and set *REMOTE_ERRNO). */
8329 remote_hostio_close (int fd
, int *remote_errno
)
8331 struct remote_state
*rs
= get_remote_state ();
8333 int left
= get_remote_packet_size () - 1;
8335 remote_buffer_add_string (&p
, &left
, "vFile:close:");
8337 remote_buffer_add_int (&p
, &left
, fd
);
8339 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
8340 remote_errno
, NULL
, NULL
);
8343 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8344 occurs (and set *REMOTE_ERRNO). */
8347 remote_hostio_unlink (const char *filename
, int *remote_errno
)
8349 struct remote_state
*rs
= get_remote_state ();
8351 int left
= get_remote_packet_size () - 1;
8353 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
8355 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8358 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
8359 remote_errno
, NULL
, NULL
);
8363 remote_fileio_errno_to_host (int errnum
)
8387 case FILEIO_ENOTDIR
:
8407 case FILEIO_ENAMETOOLONG
:
8408 return ENAMETOOLONG
;
8414 remote_hostio_error (int errnum
)
8416 int host_error
= remote_fileio_errno_to_host (errnum
);
8418 if (host_error
== -1)
8419 error (_("Unknown remote I/O error %d"), errnum
);
8421 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
8425 remote_hostio_close_cleanup (void *opaque
)
8427 int fd
= *(int *) opaque
;
8430 remote_hostio_close (fd
, &remote_errno
);
8435 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
8437 const char *filename
= bfd_get_filename (abfd
);
8438 int fd
, remote_errno
;
8441 gdb_assert (remote_filename_p (filename
));
8443 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
8446 errno
= remote_fileio_errno_to_host (remote_errno
);
8447 bfd_set_error (bfd_error_system_call
);
8451 stream
= xmalloc (sizeof (int));
8457 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
8459 int fd
= *(int *)stream
;
8464 /* Ignore errors on close; these may happen if the remote
8465 connection was already torn down. */
8466 remote_hostio_close (fd
, &remote_errno
);
8472 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
8473 file_ptr nbytes
, file_ptr offset
)
8475 int fd
= *(int *)stream
;
8477 file_ptr pos
, bytes
;
8480 while (nbytes
> pos
)
8482 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
8483 offset
+ pos
, &remote_errno
);
8485 /* Success, but no bytes, means end-of-file. */
8489 errno
= remote_fileio_errno_to_host (remote_errno
);
8490 bfd_set_error (bfd_error_system_call
);
8501 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
8503 /* FIXME: We should probably implement remote_hostio_stat. */
8504 sb
->st_size
= INT_MAX
;
8509 remote_filename_p (const char *filename
)
8511 return strncmp (filename
, "remote:", 7) == 0;
8515 remote_bfd_open (const char *remote_file
, const char *target
)
8517 return bfd_openr_iovec (remote_file
, target
,
8518 remote_bfd_iovec_open
, NULL
,
8519 remote_bfd_iovec_pread
,
8520 remote_bfd_iovec_close
,
8521 remote_bfd_iovec_stat
);
8525 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
8527 struct cleanup
*back_to
, *close_cleanup
;
8528 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8531 int bytes_in_buffer
;
8536 error (_("command can only be used with remote target"));
8538 file
= fopen (local_file
, "rb");
8540 perror_with_name (local_file
);
8541 back_to
= make_cleanup_fclose (file
);
8543 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
8545 0700, &remote_errno
);
8547 remote_hostio_error (remote_errno
);
8549 /* Send up to this many bytes at once. They won't all fit in the
8550 remote packet limit, so we'll transfer slightly fewer. */
8551 io_size
= get_remote_packet_size ();
8552 buffer
= xmalloc (io_size
);
8553 make_cleanup (xfree
, buffer
);
8555 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8557 bytes_in_buffer
= 0;
8560 while (bytes_in_buffer
|| !saw_eof
)
8564 bytes
= fread (buffer
+ bytes_in_buffer
, 1, io_size
- bytes_in_buffer
,
8569 error (_("Error reading %s."), local_file
);
8572 /* EOF. Unless there is something still in the
8573 buffer from the last iteration, we are done. */
8575 if (bytes_in_buffer
== 0)
8583 bytes
+= bytes_in_buffer
;
8584 bytes_in_buffer
= 0;
8586 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
, offset
, &remote_errno
);
8589 remote_hostio_error (remote_errno
);
8590 else if (retcode
== 0)
8591 error (_("Remote write of %d bytes returned 0!"), bytes
);
8592 else if (retcode
< bytes
)
8594 /* Short write. Save the rest of the read data for the next
8596 bytes_in_buffer
= bytes
- retcode
;
8597 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
8603 discard_cleanups (close_cleanup
);
8604 if (remote_hostio_close (fd
, &remote_errno
))
8605 remote_hostio_error (remote_errno
);
8608 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
8609 do_cleanups (back_to
);
8613 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
8615 struct cleanup
*back_to
, *close_cleanup
;
8616 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8622 error (_("command can only be used with remote target"));
8624 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
8626 remote_hostio_error (remote_errno
);
8628 file
= fopen (local_file
, "wb");
8630 perror_with_name (local_file
);
8631 back_to
= make_cleanup_fclose (file
);
8633 /* Send up to this many bytes at once. They won't all fit in the
8634 remote packet limit, so we'll transfer slightly fewer. */
8635 io_size
= get_remote_packet_size ();
8636 buffer
= xmalloc (io_size
);
8637 make_cleanup (xfree
, buffer
);
8639 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8644 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
8646 /* Success, but no bytes, means end-of-file. */
8649 remote_hostio_error (remote_errno
);
8653 bytes
= fwrite (buffer
, 1, bytes
, file
);
8655 perror_with_name (local_file
);
8658 discard_cleanups (close_cleanup
);
8659 if (remote_hostio_close (fd
, &remote_errno
))
8660 remote_hostio_error (remote_errno
);
8663 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
8664 do_cleanups (back_to
);
8668 remote_file_delete (const char *remote_file
, int from_tty
)
8670 int retcode
, remote_errno
;
8673 error (_("command can only be used with remote target"));
8675 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
8677 remote_hostio_error (remote_errno
);
8680 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
8684 remote_put_command (char *args
, int from_tty
)
8686 struct cleanup
*back_to
;
8690 error_no_arg (_("file to put"));
8692 argv
= gdb_buildargv (args
);
8693 back_to
= make_cleanup_freeargv (argv
);
8694 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8695 error (_("Invalid parameters to remote put"));
8697 remote_file_put (argv
[0], argv
[1], from_tty
);
8699 do_cleanups (back_to
);
8703 remote_get_command (char *args
, int from_tty
)
8705 struct cleanup
*back_to
;
8709 error_no_arg (_("file to get"));
8711 argv
= gdb_buildargv (args
);
8712 back_to
= make_cleanup_freeargv (argv
);
8713 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8714 error (_("Invalid parameters to remote get"));
8716 remote_file_get (argv
[0], argv
[1], from_tty
);
8718 do_cleanups (back_to
);
8722 remote_delete_command (char *args
, int from_tty
)
8724 struct cleanup
*back_to
;
8728 error_no_arg (_("file to delete"));
8730 argv
= gdb_buildargv (args
);
8731 back_to
= make_cleanup_freeargv (argv
);
8732 if (argv
[0] == NULL
|| argv
[1] != NULL
)
8733 error (_("Invalid parameters to remote delete"));
8735 remote_file_delete (argv
[0], from_tty
);
8737 do_cleanups (back_to
);
8741 remote_command (char *args
, int from_tty
)
8743 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
8746 static int remote_target_can_reverse
= 1;
8749 remote_can_execute_reverse (void)
8751 return remote_target_can_reverse
;
8755 remote_supports_non_stop (void)
8761 remote_supports_multi_process (void)
8763 struct remote_state
*rs
= get_remote_state ();
8764 return remote_multi_process_p (rs
);
8768 remote_supports_cond_tracepoints (void)
8770 struct remote_state
*rs
= get_remote_state ();
8771 return rs
->cond_tracepoints
;
8775 init_remote_ops (void)
8777 remote_ops
.to_shortname
= "remote";
8778 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
8780 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8781 Specify the serial device it is connected to\n\
8782 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
8783 remote_ops
.to_open
= remote_open
;
8784 remote_ops
.to_close
= remote_close
;
8785 remote_ops
.to_detach
= remote_detach
;
8786 remote_ops
.to_disconnect
= remote_disconnect
;
8787 remote_ops
.to_resume
= remote_resume
;
8788 remote_ops
.to_wait
= remote_wait
;
8789 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
8790 remote_ops
.to_store_registers
= remote_store_registers
;
8791 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
8792 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
8793 remote_ops
.to_files_info
= remote_files_info
;
8794 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
8795 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
8796 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
8797 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
8798 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
8799 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
8800 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
8801 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
8802 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
8803 remote_ops
.to_kill
= remote_kill
;
8804 remote_ops
.to_load
= generic_load
;
8805 remote_ops
.to_mourn_inferior
= remote_mourn
;
8806 remote_ops
.to_thread_alive
= remote_thread_alive
;
8807 remote_ops
.to_find_new_threads
= remote_threads_info
;
8808 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
8809 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
8810 remote_ops
.to_stop
= remote_stop
;
8811 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
8812 remote_ops
.to_rcmd
= remote_rcmd
;
8813 remote_ops
.to_log_command
= serial_log_command
;
8814 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
8815 remote_ops
.to_stratum
= process_stratum
;
8816 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
8817 remote_ops
.to_has_memory
= default_child_has_memory
;
8818 remote_ops
.to_has_stack
= default_child_has_stack
;
8819 remote_ops
.to_has_registers
= default_child_has_registers
;
8820 remote_ops
.to_has_execution
= default_child_has_execution
;
8821 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
8822 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
8823 remote_ops
.to_magic
= OPS_MAGIC
;
8824 remote_ops
.to_memory_map
= remote_memory_map
;
8825 remote_ops
.to_flash_erase
= remote_flash_erase
;
8826 remote_ops
.to_flash_done
= remote_flash_done
;
8827 remote_ops
.to_read_description
= remote_read_description
;
8828 remote_ops
.to_search_memory
= remote_search_memory
;
8829 remote_ops
.to_can_async_p
= remote_can_async_p
;
8830 remote_ops
.to_is_async_p
= remote_is_async_p
;
8831 remote_ops
.to_async
= remote_async
;
8832 remote_ops
.to_async_mask
= remote_async_mask
;
8833 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
8834 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
8835 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
8836 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
8839 /* Set up the extended remote vector by making a copy of the standard
8840 remote vector and adding to it. */
8843 init_extended_remote_ops (void)
8845 extended_remote_ops
= remote_ops
;
8847 extended_remote_ops
.to_shortname
= "extended-remote";
8848 extended_remote_ops
.to_longname
=
8849 "Extended remote serial target in gdb-specific protocol";
8850 extended_remote_ops
.to_doc
=
8851 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8852 Specify the serial device it is connected to (e.g. /dev/ttya).";
8853 extended_remote_ops
.to_open
= extended_remote_open
;
8854 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
8855 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
8856 extended_remote_ops
.to_detach
= extended_remote_detach
;
8857 extended_remote_ops
.to_attach
= extended_remote_attach
;
8858 extended_remote_ops
.to_kill
= extended_remote_kill
;
8862 remote_can_async_p (void)
8864 if (!target_async_permitted
)
8865 /* We only enable async when the user specifically asks for it. */
8868 /* We're async whenever the serial device is. */
8869 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
8873 remote_is_async_p (void)
8875 if (!target_async_permitted
)
8876 /* We only enable async when the user specifically asks for it. */
8879 /* We're async whenever the serial device is. */
8880 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
8883 /* Pass the SERIAL event on and up to the client. One day this code
8884 will be able to delay notifying the client of an event until the
8885 point where an entire packet has been received. */
8887 static void (*async_client_callback
) (enum inferior_event_type event_type
,
8889 static void *async_client_context
;
8890 static serial_event_ftype remote_async_serial_handler
;
8893 remote_async_serial_handler (struct serial
*scb
, void *context
)
8895 /* Don't propogate error information up to the client. Instead let
8896 the client find out about the error by querying the target. */
8897 async_client_callback (INF_REG_EVENT
, async_client_context
);
8901 remote_async_inferior_event_handler (gdb_client_data data
)
8903 inferior_event_handler (INF_REG_EVENT
, NULL
);
8907 remote_async_get_pending_events_handler (gdb_client_data data
)
8909 remote_get_pending_stop_replies ();
8913 remote_async (void (*callback
) (enum inferior_event_type event_type
,
8914 void *context
), void *context
)
8916 if (remote_async_mask_value
== 0)
8917 internal_error (__FILE__
, __LINE__
,
8918 _("Calling remote_async when async is masked"));
8920 if (callback
!= NULL
)
8922 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
8923 async_client_callback
= callback
;
8924 async_client_context
= context
;
8927 serial_async (remote_desc
, NULL
, NULL
);
8931 remote_async_mask (int new_mask
)
8933 int curr_mask
= remote_async_mask_value
;
8934 remote_async_mask_value
= new_mask
;
8939 set_remote_cmd (char *args
, int from_tty
)
8941 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
8945 show_remote_cmd (char *args
, int from_tty
)
8947 /* We can't just use cmd_show_list here, because we want to skip
8948 the redundant "show remote Z-packet" and the legacy aliases. */
8949 struct cleanup
*showlist_chain
;
8950 struct cmd_list_element
*list
= remote_show_cmdlist
;
8952 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
8953 for (; list
!= NULL
; list
= list
->next
)
8954 if (strcmp (list
->name
, "Z-packet") == 0)
8956 else if (list
->type
== not_set_cmd
)
8957 /* Alias commands are exactly like the original, except they
8958 don't have the normal type. */
8962 struct cleanup
*option_chain
8963 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
8964 ui_out_field_string (uiout
, "name", list
->name
);
8965 ui_out_text (uiout
, ": ");
8966 if (list
->type
== show_cmd
)
8967 do_setshow_command ((char *) NULL
, from_tty
, list
);
8969 cmd_func (list
, NULL
, from_tty
);
8970 /* Close the tuple. */
8971 do_cleanups (option_chain
);
8974 /* Close the tuple. */
8975 do_cleanups (showlist_chain
);
8979 /* Function to be called whenever a new objfile (shlib) is detected. */
8981 remote_new_objfile (struct objfile
*objfile
)
8983 if (remote_desc
!= 0) /* Have a remote connection. */
8984 remote_check_symbols (objfile
);
8988 _initialize_remote (void)
8990 struct remote_state
*rs
;
8992 /* architecture specific data */
8993 remote_gdbarch_data_handle
=
8994 gdbarch_data_register_post_init (init_remote_state
);
8995 remote_g_packet_data_handle
=
8996 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
8998 /* Initialize the per-target state. At the moment there is only one
8999 of these, not one per target. Only one target is active at a
9000 time. The default buffer size is unimportant; it will be expanded
9001 whenever a larger buffer is needed. */
9002 rs
= get_remote_state_raw ();
9004 rs
->buf
= xmalloc (rs
->buf_size
);
9007 add_target (&remote_ops
);
9009 init_extended_remote_ops ();
9010 add_target (&extended_remote_ops
);
9012 /* Hook into new objfile notification. */
9013 observer_attach_new_objfile (remote_new_objfile
);
9015 /* Set up signal handlers. */
9016 sigint_remote_token
=
9017 create_async_signal_handler (async_remote_interrupt
, NULL
);
9018 sigint_remote_twice_token
=
9019 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
9022 init_remote_threadtests ();
9025 /* set/show remote ... */
9027 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
9028 Remote protocol specific variables\n\
9029 Configure various remote-protocol specific variables such as\n\
9030 the packets being used"),
9031 &remote_set_cmdlist
, "set remote ",
9032 0 /* allow-unknown */, &setlist
);
9033 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
9034 Remote protocol specific variables\n\
9035 Configure various remote-protocol specific variables such as\n\
9036 the packets being used"),
9037 &remote_show_cmdlist
, "show remote ",
9038 0 /* allow-unknown */, &showlist
);
9040 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
9041 Compare section data on target to the exec file.\n\
9042 Argument is a single section name (default: all loaded sections)."),
9045 add_cmd ("packet", class_maintenance
, packet_command
, _("\
9046 Send an arbitrary packet to a remote target.\n\
9047 maintenance packet TEXT\n\
9048 If GDB is talking to an inferior via the GDB serial protocol, then\n\
9049 this command sends the string TEXT to the inferior, and displays the\n\
9050 response packet. GDB supplies the initial `$' character, and the\n\
9051 terminating `#' character and checksum."),
9054 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
9055 Set whether to send break if interrupted."), _("\
9056 Show whether to send break if interrupted."), _("\
9057 If set, a break, instead of a cntrl-c, is sent to the remote target."),
9058 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
9059 &setlist
, &showlist
);
9061 /* Install commands for configuring memory read/write packets. */
9063 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
9064 Set the maximum number of bytes per memory write packet (deprecated)."),
9066 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
9067 Show the maximum number of bytes per memory write packet (deprecated)."),
9069 add_cmd ("memory-write-packet-size", no_class
,
9070 set_memory_write_packet_size
, _("\
9071 Set the maximum number of bytes per memory-write packet.\n\
9072 Specify the number of bytes in a packet or 0 (zero) for the\n\
9073 default packet size. The actual limit is further reduced\n\
9074 dependent on the target. Specify ``fixed'' to disable the\n\
9075 further restriction and ``limit'' to enable that restriction."),
9076 &remote_set_cmdlist
);
9077 add_cmd ("memory-read-packet-size", no_class
,
9078 set_memory_read_packet_size
, _("\
9079 Set the maximum number of bytes per memory-read packet.\n\
9080 Specify the number of bytes in a packet or 0 (zero) for the\n\
9081 default packet size. The actual limit is further reduced\n\
9082 dependent on the target. Specify ``fixed'' to disable the\n\
9083 further restriction and ``limit'' to enable that restriction."),
9084 &remote_set_cmdlist
);
9085 add_cmd ("memory-write-packet-size", no_class
,
9086 show_memory_write_packet_size
,
9087 _("Show the maximum number of bytes per memory-write packet."),
9088 &remote_show_cmdlist
);
9089 add_cmd ("memory-read-packet-size", no_class
,
9090 show_memory_read_packet_size
,
9091 _("Show the maximum number of bytes per memory-read packet."),
9092 &remote_show_cmdlist
);
9094 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
9095 &remote_hw_watchpoint_limit
, _("\
9096 Set the maximum number of target hardware watchpoints."), _("\
9097 Show the maximum number of target hardware watchpoints."), _("\
9098 Specify a negative limit for unlimited."),
9099 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
9100 &remote_set_cmdlist
, &remote_show_cmdlist
);
9101 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
9102 &remote_hw_breakpoint_limit
, _("\
9103 Set the maximum number of target hardware breakpoints."), _("\
9104 Show the maximum number of target hardware breakpoints."), _("\
9105 Specify a negative limit for unlimited."),
9106 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
9107 &remote_set_cmdlist
, &remote_show_cmdlist
);
9109 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
9110 &remote_address_size
, _("\
9111 Set the maximum size of the address (in bits) in a memory packet."), _("\
9112 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
9114 NULL
, /* FIXME: i18n: */
9115 &setlist
, &showlist
);
9117 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
9118 "X", "binary-download", 1);
9120 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
9121 "vCont", "verbose-resume", 0);
9123 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
9124 "QPassSignals", "pass-signals", 0);
9126 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
9127 "qSymbol", "symbol-lookup", 0);
9129 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
9130 "P", "set-register", 1);
9132 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
9133 "p", "fetch-register", 1);
9135 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
9136 "Z0", "software-breakpoint", 0);
9138 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
9139 "Z1", "hardware-breakpoint", 0);
9141 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
9142 "Z2", "write-watchpoint", 0);
9144 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
9145 "Z3", "read-watchpoint", 0);
9147 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
9148 "Z4", "access-watchpoint", 0);
9150 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
9151 "qXfer:auxv:read", "read-aux-vector", 0);
9153 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
9154 "qXfer:features:read", "target-features", 0);
9156 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
9157 "qXfer:libraries:read", "library-info", 0);
9159 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
9160 "qXfer:memory-map:read", "memory-map", 0);
9162 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
9163 "qXfer:spu:read", "read-spu-object", 0);
9165 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
9166 "qXfer:spu:write", "write-spu-object", 0);
9168 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
9169 "qXfer:osdata:read", "osdata", 0);
9171 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
9172 "qXfer:siginfo:read", "read-siginfo-object", 0);
9174 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
9175 "qXfer:siginfo:write", "write-siginfo-object", 0);
9177 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
9178 "qGetTLSAddr", "get-thread-local-storage-address",
9181 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
9182 "qSupported", "supported-packets", 0);
9184 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
9185 "qSearch:memory", "search-memory", 0);
9187 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
9188 "vFile:open", "hostio-open", 0);
9190 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
9191 "vFile:pread", "hostio-pread", 0);
9193 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
9194 "vFile:pwrite", "hostio-pwrite", 0);
9196 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
9197 "vFile:close", "hostio-close", 0);
9199 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
9200 "vFile:unlink", "hostio-unlink", 0);
9202 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
9203 "vAttach", "attach", 0);
9205 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
9208 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
9209 "QStartNoAckMode", "noack", 0);
9211 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
9212 "vKill", "kill", 0);
9214 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
9215 "qAttached", "query-attached", 0);
9217 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
9218 "ConditionalTracepoints", "conditional-tracepoints", 0);
9220 /* Keep the old ``set remote Z-packet ...'' working. Each individual
9221 Z sub-packet has its own set and show commands, but users may
9222 have sets to this variable in their .gdbinit files (or in their
9224 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
9225 &remote_Z_packet_detect
, _("\
9226 Set use of remote protocol `Z' packets"), _("\
9227 Show use of remote protocol `Z' packets "), _("\
9228 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
9230 set_remote_protocol_Z_packet_cmd
,
9231 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
9232 &remote_set_cmdlist
, &remote_show_cmdlist
);
9234 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
9235 Manipulate files on the remote system\n\
9236 Transfer files to and from the remote target system."),
9237 &remote_cmdlist
, "remote ",
9238 0 /* allow-unknown */, &cmdlist
);
9240 add_cmd ("put", class_files
, remote_put_command
,
9241 _("Copy a local file to the remote system."),
9244 add_cmd ("get", class_files
, remote_get_command
,
9245 _("Copy a remote file to the local system."),
9248 add_cmd ("delete", class_files
, remote_delete_command
,
9249 _("Delete a remote file."),
9252 remote_exec_file
= xstrdup ("");
9253 add_setshow_string_noescape_cmd ("exec-file", class_files
,
9254 &remote_exec_file
, _("\
9255 Set the remote pathname for \"run\""), _("\
9256 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
9257 &remote_set_cmdlist
, &remote_show_cmdlist
);
9259 /* Eventually initialize fileio. See fileio.c */
9260 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
9262 /* Take advantage of the fact that the LWP field is not used, to tag
9263 special ptids with it set to != 0. */
9264 magic_null_ptid
= ptid_build (42000, 1, -1);
9265 not_sent_ptid
= ptid_build (42000, 1, -2);
9266 any_thread_ptid
= ptid_build (42000, 1, 0);