1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* See the GDB User Guide for details of the GDB remote protocol. */
25 #include "gdb_string.h"
31 #include "exceptions.h"
33 /*#include "terminal.h" */
36 #include "gdb-stabs.h"
37 #include "gdbthread.h"
41 #include "gdb_assert.h"
44 #include "cli/cli-decode.h"
45 #include "cli/cli-setshow.h"
46 #include "target-descriptions.h"
51 #include "event-loop.h"
52 #include "event-top.h"
58 #include "gdbcore.h" /* for exec_bfd */
60 #include "remote-fileio.h"
61 #include "gdb/fileio.h"
64 #include "memory-map.h"
66 /* The size to align memory write packets, when practical. The protocol
67 does not guarantee any alignment, and gdb will generate short
68 writes and unaligned writes, but even as a best-effort attempt this
69 can improve bulk transfers. For instance, if a write is misaligned
70 relative to the target's data bus, the stub may need to make an extra
71 round trip fetching data from the target. This doesn't make a
72 huge difference, but it's easy to do, so we try to be helpful.
74 The alignment chosen is arbitrary; usually data bus width is
75 important here, not the possibly larger cache line size. */
76 enum { REMOTE_ALIGN_WRITES
= 16 };
78 /* Prototypes for local functions. */
79 static void cleanup_sigint_signal_handler (void *dummy
);
80 static void initialize_sigint_signal_handler (void);
81 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
82 static int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
,
85 static void handle_remote_sigint (int);
86 static void handle_remote_sigint_twice (int);
87 static void async_remote_interrupt (gdb_client_data
);
88 void async_remote_interrupt_twice (gdb_client_data
);
90 static void remote_files_info (struct target_ops
*ignore
);
92 static void remote_prepare_to_store (struct regcache
*regcache
);
94 static void remote_open (char *name
, int from_tty
);
96 static void extended_remote_open (char *name
, int from_tty
);
98 static void remote_open_1 (char *, int, struct target_ops
*, int extended_p
);
100 static void remote_close (int quitting
);
102 static void remote_mourn (struct target_ops
*ops
);
104 static void extended_remote_restart (void);
106 static void extended_remote_mourn (struct target_ops
*);
108 static void remote_mourn_1 (struct target_ops
*);
110 static void remote_send (char **buf
, long *sizeof_buf_p
);
112 static int readchar (int timeout
);
114 static void remote_kill (struct target_ops
*ops
);
116 static int tohex (int nib
);
118 static int remote_can_async_p (void);
120 static int remote_is_async_p (void);
122 static void remote_async (void (*callback
) (enum inferior_event_type event_type
,
123 void *context
), void *context
);
125 static int remote_async_mask (int new_mask
);
127 static void remote_detach (struct target_ops
*ops
, char *args
, int from_tty
);
129 static void remote_interrupt (int signo
);
131 static void remote_interrupt_twice (int signo
);
133 static void interrupt_query (void);
135 static void set_general_thread (struct ptid ptid
);
136 static void set_continue_thread (struct ptid ptid
);
138 static void get_offsets (void);
140 static void skip_frame (void);
142 static long read_frame (char **buf_p
, long *sizeof_buf
);
144 static int hexnumlen (ULONGEST num
);
146 static void init_remote_ops (void);
148 static void init_extended_remote_ops (void);
150 static void remote_stop (ptid_t
);
152 static int ishex (int ch
, int *val
);
154 static int stubhex (int ch
);
156 static int hexnumstr (char *, ULONGEST
);
158 static int hexnumnstr (char *, ULONGEST
, int);
160 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
162 static void print_packet (char *);
164 static unsigned long crc32 (unsigned char *, int, unsigned int);
166 static void compare_sections_command (char *, int);
168 static void packet_command (char *, int);
170 static int stub_unpack_int (char *buff
, int fieldlength
);
172 static ptid_t
remote_current_thread (ptid_t oldptid
);
174 static void remote_find_new_threads (void);
176 static void record_currthread (ptid_t currthread
);
178 static int fromhex (int a
);
180 static int hex2bin (const char *hex
, gdb_byte
*bin
, int count
);
182 static int bin2hex (const gdb_byte
*bin
, char *hex
, int count
);
184 static int putpkt_binary (char *buf
, int cnt
);
186 static void check_binary_download (CORE_ADDR addr
);
188 struct packet_config
;
190 static void show_packet_config_cmd (struct packet_config
*config
);
192 static void update_packet_config (struct packet_config
*config
);
194 static void set_remote_protocol_packet_cmd (char *args
, int from_tty
,
195 struct cmd_list_element
*c
);
197 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
199 struct cmd_list_element
*c
,
202 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
203 static ptid_t
read_ptid (char *buf
, char **obuf
);
205 static void remote_query_supported (void);
207 static void remote_check_symbols (struct objfile
*objfile
);
209 void _initialize_remote (void);
212 static struct stop_reply
*stop_reply_xmalloc (void);
213 static void stop_reply_xfree (struct stop_reply
*);
214 static void do_stop_reply_xfree (void *arg
);
215 static void remote_parse_stop_reply (char *buf
, struct stop_reply
*);
216 static void push_stop_reply (struct stop_reply
*);
217 static void remote_get_pending_stop_replies (void);
218 static void discard_pending_stop_replies (int pid
);
219 static int peek_stop_reply (ptid_t ptid
);
221 static void remote_async_inferior_event_handler (gdb_client_data
);
222 static void remote_async_get_pending_events_handler (gdb_client_data
);
224 static void remote_terminal_ours (void);
226 static int remote_read_description_p (struct target_ops
*target
);
228 /* The non-stop remote protocol provisions for one pending stop reply.
229 This is where we keep it until it is acknowledged. */
231 static struct stop_reply
*pending_stop_reply
= NULL
;
235 static struct cmd_list_element
*remote_cmdlist
;
237 /* For "set remote" and "show remote". */
239 static struct cmd_list_element
*remote_set_cmdlist
;
240 static struct cmd_list_element
*remote_show_cmdlist
;
242 /* Description of the remote protocol state for the currently
243 connected target. This is per-target state, and independent of the
244 selected architecture. */
248 /* A buffer to use for incoming packets, and its current size. The
249 buffer is grown dynamically for larger incoming packets.
250 Outgoing packets may also be constructed in this buffer.
251 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
252 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
257 /* If we negotiated packet size explicitly (and thus can bypass
258 heuristics for the largest packet size that will not overflow
259 a buffer in the stub), this will be set to that packet size.
260 Otherwise zero, meaning to use the guessed size. */
261 long explicit_packet_size
;
263 /* remote_wait is normally called when the target is running and
264 waits for a stop reply packet. But sometimes we need to call it
265 when the target is already stopped. We can send a "?" packet
266 and have remote_wait read the response. Or, if we already have
267 the response, we can stash it in BUF and tell remote_wait to
268 skip calling getpkt. This flag is set when BUF contains a
269 stop reply packet and the target is not waiting. */
270 int cached_wait_status
;
272 /* True, if in no ack mode. That is, neither GDB nor the stub will
273 expect acks from each other. The connection is assumed to be
277 /* True if we're connected in extended remote mode. */
280 /* True if the stub reported support for multi-process
282 int multi_process_aware
;
284 /* True if we resumed the target and we're waiting for the target to
285 stop. In the mean time, we can't start another command/query.
286 The remote server wouldn't be ready to process it, so we'd
287 timeout waiting for a reply that would never come and eventually
288 we'd close the connection. This can happen in asynchronous mode
289 because we allow GDB commands while the target is running. */
290 int waiting_for_stop_reply
;
292 /* True if the stub reports support for non-stop mode. */
295 /* True if the stub reports support for vCont;t. */
299 /* Returns true if the multi-process extensions are in effect. */
301 remote_multi_process_p (struct remote_state
*rs
)
303 return rs
->extended
&& rs
->multi_process_aware
;
306 /* This data could be associated with a target, but we do not always
307 have access to the current target when we need it, so for now it is
308 static. This will be fine for as long as only one target is in use
310 static struct remote_state remote_state
;
312 static struct remote_state
*
313 get_remote_state_raw (void)
315 return &remote_state
;
318 /* Description of the remote protocol for a given architecture. */
322 long offset
; /* Offset into G packet. */
323 long regnum
; /* GDB's internal register number. */
324 LONGEST pnum
; /* Remote protocol register number. */
325 int in_g_packet
; /* Always part of G packet. */
326 /* long size in bytes; == register_size (target_gdbarch, regnum);
328 /* char *name; == gdbarch_register_name (target_gdbarch, regnum);
332 struct remote_arch_state
334 /* Description of the remote protocol registers. */
335 long sizeof_g_packet
;
337 /* Description of the remote protocol registers indexed by REGNUM
338 (making an array gdbarch_num_regs in size). */
339 struct packet_reg
*regs
;
341 /* This is the size (in chars) of the first response to the ``g''
342 packet. It is used as a heuristic when determining the maximum
343 size of memory-read and memory-write packets. A target will
344 typically only reserve a buffer large enough to hold the ``g''
345 packet. The size does not include packet overhead (headers and
347 long actual_register_packet_size
;
349 /* This is the maximum size (in chars) of a non read/write packet.
350 It is also used as a cap on the size of read/write packets. */
351 long remote_packet_size
;
355 /* Handle for retreving the remote protocol data from gdbarch. */
356 static struct gdbarch_data
*remote_gdbarch_data_handle
;
358 static struct remote_arch_state
*
359 get_remote_arch_state (void)
361 return gdbarch_data (target_gdbarch
, remote_gdbarch_data_handle
);
364 /* Fetch the global remote target state. */
366 static struct remote_state
*
367 get_remote_state (void)
369 /* Make sure that the remote architecture state has been
370 initialized, because doing so might reallocate rs->buf. Any
371 function which calls getpkt also needs to be mindful of changes
372 to rs->buf, but this call limits the number of places which run
374 get_remote_arch_state ();
376 return get_remote_state_raw ();
380 compare_pnums (const void *lhs_
, const void *rhs_
)
382 const struct packet_reg
* const *lhs
= lhs_
;
383 const struct packet_reg
* const *rhs
= rhs_
;
385 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
387 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
394 init_remote_state (struct gdbarch
*gdbarch
)
396 int regnum
, num_remote_regs
, offset
;
397 struct remote_state
*rs
= get_remote_state_raw ();
398 struct remote_arch_state
*rsa
;
399 struct packet_reg
**remote_regs
;
401 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
403 /* Use the architecture to build a regnum<->pnum table, which will be
404 1:1 unless a feature set specifies otherwise. */
405 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
406 gdbarch_num_regs (gdbarch
),
408 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
410 struct packet_reg
*r
= &rsa
->regs
[regnum
];
412 if (register_size (gdbarch
, regnum
) == 0)
413 /* Do not try to fetch zero-sized (placeholder) registers. */
416 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
421 /* Define the g/G packet format as the contents of each register
422 with a remote protocol number, in order of ascending protocol
425 remote_regs
= alloca (gdbarch_num_regs (gdbarch
)
426 * sizeof (struct packet_reg
*));
427 for (num_remote_regs
= 0, regnum
= 0;
428 regnum
< gdbarch_num_regs (gdbarch
);
430 if (rsa
->regs
[regnum
].pnum
!= -1)
431 remote_regs
[num_remote_regs
++] = &rsa
->regs
[regnum
];
433 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
436 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
438 remote_regs
[regnum
]->in_g_packet
= 1;
439 remote_regs
[regnum
]->offset
= offset
;
440 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
443 /* Record the maximum possible size of the g packet - it may turn out
445 rsa
->sizeof_g_packet
= offset
;
447 /* Default maximum number of characters in a packet body. Many
448 remote stubs have a hardwired buffer size of 400 bytes
449 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
450 as the maximum packet-size to ensure that the packet and an extra
451 NUL character can always fit in the buffer. This stops GDB
452 trashing stubs that try to squeeze an extra NUL into what is
453 already a full buffer (As of 1999-12-04 that was most stubs). */
454 rsa
->remote_packet_size
= 400 - 1;
456 /* This one is filled in when a ``g'' packet is received. */
457 rsa
->actual_register_packet_size
= 0;
459 /* Should rsa->sizeof_g_packet needs more space than the
460 default, adjust the size accordingly. Remember that each byte is
461 encoded as two characters. 32 is the overhead for the packet
462 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
463 (``$NN:G...#NN'') is a better guess, the below has been padded a
465 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
466 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
468 /* Make sure that the packet buffer is plenty big enough for
469 this architecture. */
470 if (rs
->buf_size
< rsa
->remote_packet_size
)
472 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
473 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
479 /* Return the current allowed size of a remote packet. This is
480 inferred from the current architecture, and should be used to
481 limit the length of outgoing packets. */
483 get_remote_packet_size (void)
485 struct remote_state
*rs
= get_remote_state ();
486 struct remote_arch_state
*rsa
= get_remote_arch_state ();
488 if (rs
->explicit_packet_size
)
489 return rs
->explicit_packet_size
;
491 return rsa
->remote_packet_size
;
494 static struct packet_reg
*
495 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
497 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch
))
501 struct packet_reg
*r
= &rsa
->regs
[regnum
];
502 gdb_assert (r
->regnum
== regnum
);
507 static struct packet_reg
*
508 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
511 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch
); i
++)
513 struct packet_reg
*r
= &rsa
->regs
[i
];
520 /* FIXME: graces/2002-08-08: These variables should eventually be
521 bound to an instance of the target object (as in gdbarch-tdep()),
522 when such a thing exists. */
524 /* This is set to the data address of the access causing the target
525 to stop for a watchpoint. */
526 static CORE_ADDR remote_watch_data_address
;
528 /* This is non-zero if target stopped for a watchpoint. */
529 static int remote_stopped_by_watchpoint_p
;
531 static struct target_ops remote_ops
;
533 static struct target_ops extended_remote_ops
;
535 static int remote_async_mask_value
= 1;
537 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
538 ``forever'' still use the normal timeout mechanism. This is
539 currently used by the ASYNC code to guarentee that target reads
540 during the initial connect always time-out. Once getpkt has been
541 modified to return a timeout indication and, in turn
542 remote_wait()/wait_for_inferior() have gained a timeout parameter
544 static int wait_forever_enabled_p
= 1;
547 /* This variable chooses whether to send a ^C or a break when the user
548 requests program interruption. Although ^C is usually what remote
549 systems expect, and that is the default here, sometimes a break is
550 preferable instead. */
552 static int remote_break
;
554 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
555 remote_open knows that we don't have a file open when the program
557 static struct serial
*remote_desc
= NULL
;
559 /* This variable sets the number of bits in an address that are to be
560 sent in a memory ("M" or "m") packet. Normally, after stripping
561 leading zeros, the entire address would be sent. This variable
562 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
563 initial implementation of remote.c restricted the address sent in
564 memory packets to ``host::sizeof long'' bytes - (typically 32
565 bits). Consequently, for 64 bit targets, the upper 32 bits of an
566 address was never sent. Since fixing this bug may cause a break in
567 some remote targets this variable is principly provided to
568 facilitate backward compatibility. */
570 static int remote_address_size
;
572 /* Temporary to track who currently owns the terminal. See
573 remote_terminal_* for more details. */
575 static int remote_async_terminal_ours_p
;
577 /* The executable file to use for "run" on the remote side. */
579 static char *remote_exec_file
= "";
582 /* User configurable variables for the number of characters in a
583 memory read/write packet. MIN (rsa->remote_packet_size,
584 rsa->sizeof_g_packet) is the default. Some targets need smaller
585 values (fifo overruns, et.al.) and some users need larger values
586 (speed up transfers). The variables ``preferred_*'' (the user
587 request), ``current_*'' (what was actually set) and ``forced_*''
588 (Positive - a soft limit, negative - a hard limit). */
590 struct memory_packet_config
597 /* Compute the current size of a read/write packet. Since this makes
598 use of ``actual_register_packet_size'' the computation is dynamic. */
601 get_memory_packet_size (struct memory_packet_config
*config
)
603 struct remote_state
*rs
= get_remote_state ();
604 struct remote_arch_state
*rsa
= get_remote_arch_state ();
606 /* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
607 law?) that some hosts don't cope very well with large alloca()
608 calls. Eventually the alloca() code will be replaced by calls to
609 xmalloc() and make_cleanups() allowing this restriction to either
610 be lifted or removed. */
611 #ifndef MAX_REMOTE_PACKET_SIZE
612 #define MAX_REMOTE_PACKET_SIZE 16384
614 /* NOTE: 20 ensures we can write at least one byte. */
615 #ifndef MIN_REMOTE_PACKET_SIZE
616 #define MIN_REMOTE_PACKET_SIZE 20
621 if (config
->size
<= 0)
622 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
624 what_they_get
= config
->size
;
628 what_they_get
= get_remote_packet_size ();
629 /* Limit the packet to the size specified by the user. */
631 && what_they_get
> config
->size
)
632 what_they_get
= config
->size
;
634 /* Limit it to the size of the targets ``g'' response unless we have
635 permission from the stub to use a larger packet size. */
636 if (rs
->explicit_packet_size
== 0
637 && rsa
->actual_register_packet_size
> 0
638 && what_they_get
> rsa
->actual_register_packet_size
)
639 what_they_get
= rsa
->actual_register_packet_size
;
641 if (what_they_get
> MAX_REMOTE_PACKET_SIZE
)
642 what_they_get
= MAX_REMOTE_PACKET_SIZE
;
643 if (what_they_get
< MIN_REMOTE_PACKET_SIZE
)
644 what_they_get
= MIN_REMOTE_PACKET_SIZE
;
646 /* Make sure there is room in the global buffer for this packet
647 (including its trailing NUL byte). */
648 if (rs
->buf_size
< what_they_get
+ 1)
650 rs
->buf_size
= 2 * what_they_get
;
651 rs
->buf
= xrealloc (rs
->buf
, 2 * what_they_get
);
654 return what_they_get
;
657 /* Update the size of a read/write packet. If they user wants
658 something really big then do a sanity check. */
661 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
663 int fixed_p
= config
->fixed_p
;
664 long size
= config
->size
;
666 error (_("Argument required (integer, `fixed' or `limited')."));
667 else if (strcmp (args
, "hard") == 0
668 || strcmp (args
, "fixed") == 0)
670 else if (strcmp (args
, "soft") == 0
671 || strcmp (args
, "limit") == 0)
676 size
= strtoul (args
, &end
, 0);
678 error (_("Invalid %s (bad syntax)."), config
->name
);
680 /* Instead of explicitly capping the size of a packet to
681 MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
682 instead allowed to set the size to something arbitrarily
684 if (size
> MAX_REMOTE_PACKET_SIZE
)
685 error (_("Invalid %s (too large)."), config
->name
);
689 if (fixed_p
&& !config
->fixed_p
)
691 if (! query (_("The target may not be able to correctly handle a %s\n"
692 "of %ld bytes. Change the packet size? "),
694 error (_("Packet size not changed."));
696 /* Update the config. */
697 config
->fixed_p
= fixed_p
;
702 show_memory_packet_size (struct memory_packet_config
*config
)
704 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
706 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
707 get_memory_packet_size (config
));
709 printf_filtered (_("Packets are limited to %ld bytes.\n"),
710 get_memory_packet_size (config
));
713 static struct memory_packet_config memory_write_packet_config
=
715 "memory-write-packet-size",
719 set_memory_write_packet_size (char *args
, int from_tty
)
721 set_memory_packet_size (args
, &memory_write_packet_config
);
725 show_memory_write_packet_size (char *args
, int from_tty
)
727 show_memory_packet_size (&memory_write_packet_config
);
731 get_memory_write_packet_size (void)
733 return get_memory_packet_size (&memory_write_packet_config
);
736 static struct memory_packet_config memory_read_packet_config
=
738 "memory-read-packet-size",
742 set_memory_read_packet_size (char *args
, int from_tty
)
744 set_memory_packet_size (args
, &memory_read_packet_config
);
748 show_memory_read_packet_size (char *args
, int from_tty
)
750 show_memory_packet_size (&memory_read_packet_config
);
754 get_memory_read_packet_size (void)
756 long size
= get_memory_packet_size (&memory_read_packet_config
);
757 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
758 extra buffer size argument before the memory read size can be
759 increased beyond this. */
760 if (size
> get_remote_packet_size ())
761 size
= get_remote_packet_size ();
766 /* Generic configuration support for packets the stub optionally
767 supports. Allows the user to specify the use of the packet as well
768 as allowing GDB to auto-detect support in the remote stub. */
772 PACKET_SUPPORT_UNKNOWN
= 0,
781 enum auto_boolean detect
;
782 enum packet_support support
;
785 /* Analyze a packet's return value and update the packet config
796 update_packet_config (struct packet_config
*config
)
798 switch (config
->detect
)
800 case AUTO_BOOLEAN_TRUE
:
801 config
->support
= PACKET_ENABLE
;
803 case AUTO_BOOLEAN_FALSE
:
804 config
->support
= PACKET_DISABLE
;
806 case AUTO_BOOLEAN_AUTO
:
807 config
->support
= PACKET_SUPPORT_UNKNOWN
;
813 show_packet_config_cmd (struct packet_config
*config
)
815 char *support
= "internal-error";
816 switch (config
->support
)
822 support
= "disabled";
824 case PACKET_SUPPORT_UNKNOWN
:
828 switch (config
->detect
)
830 case AUTO_BOOLEAN_AUTO
:
831 printf_filtered (_("Support for the `%s' packet is auto-detected, currently %s.\n"),
832 config
->name
, support
);
834 case AUTO_BOOLEAN_TRUE
:
835 case AUTO_BOOLEAN_FALSE
:
836 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
837 config
->name
, support
);
843 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
844 const char *title
, int legacy
)
851 config
->title
= title
;
852 config
->detect
= AUTO_BOOLEAN_AUTO
;
853 config
->support
= PACKET_SUPPORT_UNKNOWN
;
854 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
856 show_doc
= xstrprintf ("Show current use of remote protocol `%s' (%s) packet",
858 /* set/show TITLE-packet {auto,on,off} */
859 cmd_name
= xstrprintf ("%s-packet", title
);
860 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
861 &config
->detect
, set_doc
, show_doc
, NULL
, /* help_doc */
862 set_remote_protocol_packet_cmd
,
863 show_remote_protocol_packet_cmd
,
864 &remote_set_cmdlist
, &remote_show_cmdlist
);
865 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
869 legacy_name
= xstrprintf ("%s-packet", name
);
870 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
871 &remote_set_cmdlist
);
872 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
873 &remote_show_cmdlist
);
877 static enum packet_result
878 packet_check_result (const char *buf
)
882 /* The stub recognized the packet request. Check that the
883 operation succeeded. */
885 && isxdigit (buf
[1]) && isxdigit (buf
[2])
887 /* "Enn" - definitly an error. */
890 /* Always treat "E." as an error. This will be used for
891 more verbose error messages, such as E.memtypes. */
892 if (buf
[0] == 'E' && buf
[1] == '.')
895 /* The packet may or may not be OK. Just assume it is. */
899 /* The stub does not support the packet. */
900 return PACKET_UNKNOWN
;
903 static enum packet_result
904 packet_ok (const char *buf
, struct packet_config
*config
)
906 enum packet_result result
;
908 result
= packet_check_result (buf
);
913 /* The stub recognized the packet request. */
914 switch (config
->support
)
916 case PACKET_SUPPORT_UNKNOWN
:
918 fprintf_unfiltered (gdb_stdlog
,
919 "Packet %s (%s) is supported\n",
920 config
->name
, config
->title
);
921 config
->support
= PACKET_ENABLE
;
924 internal_error (__FILE__
, __LINE__
,
925 _("packet_ok: attempt to use a disabled packet"));
932 /* The stub does not support the packet. */
933 switch (config
->support
)
936 if (config
->detect
== AUTO_BOOLEAN_AUTO
)
937 /* If the stub previously indicated that the packet was
938 supported then there is a protocol error.. */
939 error (_("Protocol error: %s (%s) conflicting enabled responses."),
940 config
->name
, config
->title
);
942 /* The user set it wrong. */
943 error (_("Enabled packet %s (%s) not recognized by stub"),
944 config
->name
, config
->title
);
946 case PACKET_SUPPORT_UNKNOWN
:
948 fprintf_unfiltered (gdb_stdlog
,
949 "Packet %s (%s) is NOT supported\n",
950 config
->name
, config
->title
);
951 config
->support
= PACKET_DISABLE
;
979 PACKET_qXfer_features
,
980 PACKET_qXfer_libraries
,
981 PACKET_qXfer_memory_map
,
982 PACKET_qXfer_spu_read
,
983 PACKET_qXfer_spu_write
,
988 PACKET_qSearch_memory
,
991 PACKET_QStartNoAckMode
,
993 PACKET_qXfer_siginfo_read
,
994 PACKET_qXfer_siginfo_write
,
999 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1002 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
1003 struct cmd_list_element
*c
)
1005 struct packet_config
*packet
;
1007 for (packet
= remote_protocol_packets
;
1008 packet
< &remote_protocol_packets
[PACKET_MAX
];
1011 if (&packet
->detect
== c
->var
)
1013 update_packet_config (packet
);
1017 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1022 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1023 struct cmd_list_element
*c
,
1026 struct packet_config
*packet
;
1028 for (packet
= remote_protocol_packets
;
1029 packet
< &remote_protocol_packets
[PACKET_MAX
];
1032 if (&packet
->detect
== c
->var
)
1034 show_packet_config_cmd (packet
);
1038 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1042 /* Should we try one of the 'Z' requests? */
1046 Z_PACKET_SOFTWARE_BP
,
1047 Z_PACKET_HARDWARE_BP
,
1054 /* For compatibility with older distributions. Provide a ``set remote
1055 Z-packet ...'' command that updates all the Z packet types. */
1057 static enum auto_boolean remote_Z_packet_detect
;
1060 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1061 struct cmd_list_element
*c
)
1064 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1066 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1067 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1072 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1073 struct cmd_list_element
*c
,
1077 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1079 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1083 /* Should we try the 'ThreadInfo' query packet?
1085 This variable (NOT available to the user: auto-detect only!)
1086 determines whether GDB will use the new, simpler "ThreadInfo"
1087 query or the older, more complex syntax for thread queries.
1088 This is an auto-detect variable (set to true at each connect,
1089 and set to false when the target fails to recognize it). */
1091 static int use_threadinfo_query
;
1092 static int use_threadextra_query
;
1094 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1095 static struct async_signal_handler
*sigint_remote_twice_token
;
1096 static struct async_signal_handler
*sigint_remote_token
;
1099 /* Asynchronous signal handle registered as event loop source for
1100 when we have pending events ready to be passed to the core. */
1102 static struct async_event_handler
*remote_async_inferior_event_token
;
1104 /* Asynchronous signal handle registered as event loop source for when
1105 the remote sent us a %Stop notification. The registered callback
1106 will do a vStopped sequence to pull the rest of the events out of
1107 the remote side into our event queue. */
1109 static struct async_event_handler
*remote_async_get_pending_events_token
;
1112 static ptid_t magic_null_ptid
;
1113 static ptid_t not_sent_ptid
;
1114 static ptid_t any_thread_ptid
;
1116 /* These are the threads which we last sent to the remote system. The
1117 TID member will be -1 for all or -2 for not sent yet. */
1119 static ptid_t general_thread
;
1120 static ptid_t continue_thread
;
1122 /* Find out if the stub attached to PID (and hence GDB should offer to
1123 detach instead of killing it when bailing out). */
1126 remote_query_attached (int pid
)
1128 struct remote_state
*rs
= get_remote_state ();
1130 if (remote_protocol_packets
[PACKET_qAttached
].support
== PACKET_DISABLE
)
1133 if (remote_multi_process_p (rs
))
1134 sprintf (rs
->buf
, "qAttached:%x", pid
);
1136 sprintf (rs
->buf
, "qAttached");
1139 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1141 switch (packet_ok (rs
->buf
,
1142 &remote_protocol_packets
[PACKET_qAttached
]))
1145 if (strcmp (rs
->buf
, "1") == 0)
1149 warning (_("Remote failure reply: %s"), rs
->buf
);
1151 case PACKET_UNKNOWN
:
1158 /* Add PID to GDB's inferior table. Since we can be connected to a
1159 remote system before before knowing about any inferior, mark the
1160 target with execution when we find the first inferior. If ATTACHED
1161 is 1, then we had just attached to this inferior. If it is 0, then
1162 we just created this inferior. If it is -1, then try querying the
1163 remote stub to find out if it had attached to the inferior or
1166 static struct inferior
*
1167 remote_add_inferior (int pid
, int attached
)
1169 struct remote_state
*rs
= get_remote_state ();
1170 struct inferior
*inf
;
1172 /* Check whether this process we're learning about is to be
1173 considered attached, or if is to be considered to have been
1174 spawned by the stub. */
1176 attached
= remote_query_attached (pid
);
1178 inf
= add_inferior (pid
);
1180 inf
->attach_flag
= attached
;
1185 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1186 according to RUNNING. */
1189 remote_add_thread (ptid_t ptid
, int running
)
1193 set_executing (ptid
, running
);
1194 set_running (ptid
, running
);
1197 /* Come here when we learn about a thread id from the remote target.
1198 It may be the first time we hear about such thread, so take the
1199 opportunity to add it to GDB's thread list. In case this is the
1200 first time we're noticing its corresponding inferior, add it to
1201 GDB's inferior list as well. */
1204 remote_notice_new_inferior (ptid_t currthread
, int running
)
1206 struct remote_state
*rs
= get_remote_state ();
1208 /* If this is a new thread, add it to GDB's thread list.
1209 If we leave it up to WFI to do this, bad things will happen. */
1211 if (in_thread_list (currthread
) && is_exited (currthread
))
1213 /* We're seeing an event on a thread id we knew had exited.
1214 This has to be a new thread reusing the old id. Add it. */
1215 remote_add_thread (currthread
, running
);
1219 if (!in_thread_list (currthread
))
1221 struct inferior
*inf
= NULL
;
1222 int pid
= ptid_get_pid (currthread
);
1224 if (ptid_is_pid (inferior_ptid
)
1225 && pid
== ptid_get_pid (inferior_ptid
))
1227 /* inferior_ptid has no thread member yet. This can happen
1228 with the vAttach -> remote_wait,"TAAthread:" path if the
1229 stub doesn't support qC. This is the first stop reported
1230 after an attach, so this is the main thread. Update the
1231 ptid in the thread list. */
1232 if (in_thread_list (pid_to_ptid (pid
)))
1233 thread_change_ptid (inferior_ptid
, currthread
);
1236 remote_add_thread (currthread
, running
);
1237 inferior_ptid
= currthread
;
1242 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1244 /* inferior_ptid is not set yet. This can happen with the
1245 vRun -> remote_wait,"TAAthread:" path if the stub
1246 doesn't support qC. This is the first stop reported
1247 after an attach, so this is the main thread. Update the
1248 ptid in the thread list. */
1249 thread_change_ptid (inferior_ptid
, currthread
);
1253 /* When connecting to a target remote, or to a target
1254 extended-remote which already was debugging an inferior, we
1255 may not know about it yet. Add it before adding its child
1256 thread, so notifications are emitted in a sensible order. */
1257 if (!in_inferior_list (ptid_get_pid (currthread
)))
1258 inf
= remote_add_inferior (ptid_get_pid (currthread
), -1);
1260 /* This is really a new thread. Add it. */
1261 remote_add_thread (currthread
, running
);
1263 /* If we found a new inferior, let the common code do whatever
1264 it needs to with it (e.g., read shared libraries, insert
1267 notice_new_inferior (currthread
, running
, 0);
1271 /* Call this function as a result of
1272 1) A halt indication (T packet) containing a thread id
1273 2) A direct query of currthread
1274 3) Successful execution of set thread
1278 record_currthread (ptid_t currthread
)
1280 general_thread
= currthread
;
1282 if (ptid_equal (currthread
, minus_one_ptid
))
1283 /* We're just invalidating the local thread mirror. */
1286 remote_notice_new_inferior (currthread
, 0);
1289 static char *last_pass_packet
;
1291 /* If 'QPassSignals' is supported, tell the remote stub what signals
1292 it can simply pass through to the inferior without reporting. */
1295 remote_pass_signals (void)
1297 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1299 char *pass_packet
, *p
;
1300 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1303 gdb_assert (numsigs
< 256);
1304 for (i
= 0; i
< numsigs
; i
++)
1306 if (signal_stop_state (i
) == 0
1307 && signal_print_state (i
) == 0
1308 && signal_pass_state (i
) == 1)
1311 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1312 strcpy (pass_packet
, "QPassSignals:");
1313 p
= pass_packet
+ strlen (pass_packet
);
1314 for (i
= 0; i
< numsigs
; i
++)
1316 if (signal_stop_state (i
) == 0
1317 && signal_print_state (i
) == 0
1318 && signal_pass_state (i
) == 1)
1321 *p
++ = tohex (i
>> 4);
1322 *p
++ = tohex (i
& 15);
1331 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1333 struct remote_state
*rs
= get_remote_state ();
1334 char *buf
= rs
->buf
;
1336 putpkt (pass_packet
);
1337 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1338 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1339 if (last_pass_packet
)
1340 xfree (last_pass_packet
);
1341 last_pass_packet
= pass_packet
;
1344 xfree (pass_packet
);
1348 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1349 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1350 thread. If GEN is set, set the general thread, if not, then set
1351 the step/continue thread. */
1353 set_thread (struct ptid ptid
, int gen
)
1355 struct remote_state
*rs
= get_remote_state ();
1356 ptid_t state
= gen
? general_thread
: continue_thread
;
1357 char *buf
= rs
->buf
;
1358 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
1360 if (ptid_equal (state
, ptid
))
1364 *buf
++ = gen
? 'g' : 'c';
1365 if (ptid_equal (ptid
, magic_null_ptid
))
1366 xsnprintf (buf
, endbuf
- buf
, "0");
1367 else if (ptid_equal (ptid
, any_thread_ptid
))
1368 xsnprintf (buf
, endbuf
- buf
, "0");
1369 else if (ptid_equal (ptid
, minus_one_ptid
))
1370 xsnprintf (buf
, endbuf
- buf
, "-1");
1372 write_ptid (buf
, endbuf
, ptid
);
1374 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1376 general_thread
= ptid
;
1378 continue_thread
= ptid
;
1382 set_general_thread (struct ptid ptid
)
1384 set_thread (ptid
, 1);
1388 set_continue_thread (struct ptid ptid
)
1390 set_thread (ptid
, 0);
1393 /* Change the remote current process. Which thread within the process
1394 ends up selected isn't important, as long as it is the same process
1395 as what INFERIOR_PTID points to.
1397 This comes from that fact that there is no explicit notion of
1398 "selected process" in the protocol. The selected process for
1399 general operations is the process the selected general thread
1403 set_general_process (void)
1405 struct remote_state
*rs
= get_remote_state ();
1407 /* If the remote can't handle multiple processes, don't bother. */
1408 if (!remote_multi_process_p (rs
))
1411 /* We only need to change the remote current thread if it's pointing
1412 at some other process. */
1413 if (ptid_get_pid (general_thread
) != ptid_get_pid (inferior_ptid
))
1414 set_general_thread (inferior_ptid
);
1418 /* Return nonzero if the thread PTID is still alive on the remote
1422 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
1424 struct remote_state
*rs
= get_remote_state ();
1425 int tid
= ptid_get_tid (ptid
);
1428 if (ptid_equal (ptid
, magic_null_ptid
))
1429 /* The main thread is always alive. */
1432 if (ptid_get_pid (ptid
) != 0 && ptid_get_tid (ptid
) == 0)
1433 /* The main thread is always alive. This can happen after a
1434 vAttach, if the remote side doesn't support
1439 endp
= rs
->buf
+ get_remote_packet_size ();
1442 write_ptid (p
, endp
, ptid
);
1445 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1446 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1449 /* About these extended threadlist and threadinfo packets. They are
1450 variable length packets but, the fields within them are often fixed
1451 length. They are redundent enough to send over UDP as is the
1452 remote protocol in general. There is a matching unit test module
1455 #define OPAQUETHREADBYTES 8
1457 /* a 64 bit opaque identifier */
1458 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1460 /* WARNING: This threadref data structure comes from the remote O.S.,
1461 libstub protocol encoding, and remote.c. it is not particularly
1464 /* Right now, the internal structure is int. We want it to be bigger.
1468 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1470 /* gdb_ext_thread_info is an internal GDB data structure which is
1471 equivalent to the reply of the remote threadinfo packet. */
1473 struct gdb_ext_thread_info
1475 threadref threadid
; /* External form of thread reference. */
1476 int active
; /* Has state interesting to GDB?
1478 char display
[256]; /* Brief state display, name,
1479 blocked/suspended. */
1480 char shortname
[32]; /* To be used to name threads. */
1481 char more_display
[256]; /* Long info, statistics, queue depth,
1485 /* The volume of remote transfers can be limited by submitting
1486 a mask containing bits specifying the desired information.
1487 Use a union of these values as the 'selection' parameter to
1488 get_thread_info. FIXME: Make these TAG names more thread specific.
1491 #define TAG_THREADID 1
1492 #define TAG_EXISTS 2
1493 #define TAG_DISPLAY 4
1494 #define TAG_THREADNAME 8
1495 #define TAG_MOREDISPLAY 16
1497 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1499 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1501 static char *unpack_nibble (char *buf
, int *val
);
1503 static char *pack_nibble (char *buf
, int nibble
);
1505 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1507 static char *unpack_byte (char *buf
, int *value
);
1509 static char *pack_int (char *buf
, int value
);
1511 static char *unpack_int (char *buf
, int *value
);
1513 static char *unpack_string (char *src
, char *dest
, int length
);
1515 static char *pack_threadid (char *pkt
, threadref
*id
);
1517 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1519 void int_to_threadref (threadref
*id
, int value
);
1521 static int threadref_to_int (threadref
*ref
);
1523 static void copy_threadref (threadref
*dest
, threadref
*src
);
1525 static int threadmatch (threadref
*dest
, threadref
*src
);
1527 static char *pack_threadinfo_request (char *pkt
, int mode
,
1530 static int remote_unpack_thread_info_response (char *pkt
,
1531 threadref
*expectedref
,
1532 struct gdb_ext_thread_info
1536 static int remote_get_threadinfo (threadref
*threadid
,
1537 int fieldset
, /*TAG mask */
1538 struct gdb_ext_thread_info
*info
);
1540 static char *pack_threadlist_request (char *pkt
, int startflag
,
1542 threadref
*nextthread
);
1544 static int parse_threadlist_response (char *pkt
,
1546 threadref
*original_echo
,
1547 threadref
*resultlist
,
1550 static int remote_get_threadlist (int startflag
,
1551 threadref
*nextthread
,
1555 threadref
*threadlist
);
1557 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1559 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1560 void *context
, int looplimit
);
1562 static int remote_newthread_step (threadref
*ref
, void *context
);
1565 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1566 buffer we're allowed to write to. Returns
1567 BUF+CHARACTERS_WRITTEN. */
1570 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
1573 struct remote_state
*rs
= get_remote_state ();
1575 if (remote_multi_process_p (rs
))
1577 pid
= ptid_get_pid (ptid
);
1579 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
1581 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
1583 tid
= ptid_get_tid (ptid
);
1585 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
1587 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
1592 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1593 passed the last parsed char. Returns null_ptid on error. */
1596 read_ptid (char *buf
, char **obuf
)
1600 ULONGEST pid
= 0, tid
= 0;
1605 /* Multi-process ptid. */
1606 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1608 error (_("invalid remote ptid: %s\n"), p
);
1611 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1614 return ptid_build (pid
, 0, tid
);
1617 /* No multi-process. Just a tid. */
1618 pp
= unpack_varlen_hex (p
, &tid
);
1620 /* Since the stub is not sending a process id, then default to
1621 what's in inferior_ptid, unless it's null at this point. If so,
1622 then since there's no way to know the pid of the reported
1623 threads, use the magic number. */
1624 if (ptid_equal (inferior_ptid
, null_ptid
))
1625 pid
= ptid_get_pid (magic_null_ptid
);
1627 pid
= ptid_get_pid (inferior_ptid
);
1631 return ptid_build (pid
, 0, tid
);
1634 /* Encode 64 bits in 16 chars of hex. */
1636 static const char hexchars
[] = "0123456789abcdef";
1639 ishex (int ch
, int *val
)
1641 if ((ch
>= 'a') && (ch
<= 'f'))
1643 *val
= ch
- 'a' + 10;
1646 if ((ch
>= 'A') && (ch
<= 'F'))
1648 *val
= ch
- 'A' + 10;
1651 if ((ch
>= '0') && (ch
<= '9'))
1662 if (ch
>= 'a' && ch
<= 'f')
1663 return ch
- 'a' + 10;
1664 if (ch
>= '0' && ch
<= '9')
1666 if (ch
>= 'A' && ch
<= 'F')
1667 return ch
- 'A' + 10;
1672 stub_unpack_int (char *buff
, int fieldlength
)
1679 nibble
= stubhex (*buff
++);
1683 retval
= retval
<< 4;
1689 unpack_varlen_hex (char *buff
, /* packet to parse */
1693 ULONGEST retval
= 0;
1695 while (ishex (*buff
, &nibble
))
1698 retval
= retval
<< 4;
1699 retval
|= nibble
& 0x0f;
1706 unpack_nibble (char *buf
, int *val
)
1708 *val
= fromhex (*buf
++);
1713 pack_nibble (char *buf
, int nibble
)
1715 *buf
++ = hexchars
[(nibble
& 0x0f)];
1720 pack_hex_byte (char *pkt
, int byte
)
1722 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1723 *pkt
++ = hexchars
[(byte
& 0xf)];
1728 unpack_byte (char *buf
, int *value
)
1730 *value
= stub_unpack_int (buf
, 2);
1735 pack_int (char *buf
, int value
)
1737 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1738 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1739 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1740 buf
= pack_hex_byte (buf
, (value
& 0xff));
1745 unpack_int (char *buf
, int *value
)
1747 *value
= stub_unpack_int (buf
, 8);
1751 #if 0 /* Currently unused, uncomment when needed. */
1752 static char *pack_string (char *pkt
, char *string
);
1755 pack_string (char *pkt
, char *string
)
1760 len
= strlen (string
);
1762 len
= 200; /* Bigger than most GDB packets, junk??? */
1763 pkt
= pack_hex_byte (pkt
, len
);
1767 if ((ch
== '\0') || (ch
== '#'))
1768 ch
= '*'; /* Protect encapsulation. */
1773 #endif /* 0 (unused) */
1776 unpack_string (char *src
, char *dest
, int length
)
1785 pack_threadid (char *pkt
, threadref
*id
)
1788 unsigned char *altid
;
1790 altid
= (unsigned char *) id
;
1791 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1793 pkt
= pack_hex_byte (pkt
, *altid
++);
1799 unpack_threadid (char *inbuf
, threadref
*id
)
1802 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1805 altref
= (char *) id
;
1807 while (inbuf
< limit
)
1809 x
= stubhex (*inbuf
++);
1810 y
= stubhex (*inbuf
++);
1811 *altref
++ = (x
<< 4) | y
;
1816 /* Externally, threadrefs are 64 bits but internally, they are still
1817 ints. This is due to a mismatch of specifications. We would like
1818 to use 64bit thread references internally. This is an adapter
1822 int_to_threadref (threadref
*id
, int value
)
1824 unsigned char *scan
;
1826 scan
= (unsigned char *) id
;
1832 *scan
++ = (value
>> 24) & 0xff;
1833 *scan
++ = (value
>> 16) & 0xff;
1834 *scan
++ = (value
>> 8) & 0xff;
1835 *scan
++ = (value
& 0xff);
1839 threadref_to_int (threadref
*ref
)
1842 unsigned char *scan
;
1848 value
= (value
<< 8) | ((*scan
++) & 0xff);
1853 copy_threadref (threadref
*dest
, threadref
*src
)
1856 unsigned char *csrc
, *cdest
;
1858 csrc
= (unsigned char *) src
;
1859 cdest
= (unsigned char *) dest
;
1866 threadmatch (threadref
*dest
, threadref
*src
)
1868 /* Things are broken right now, so just assume we got a match. */
1870 unsigned char *srcp
, *destp
;
1872 srcp
= (char *) src
;
1873 destp
= (char *) dest
;
1877 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1884 threadid:1, # always request threadid
1891 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1894 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1896 *pkt
++ = 'q'; /* Info Query */
1897 *pkt
++ = 'P'; /* process or thread info */
1898 pkt
= pack_int (pkt
, mode
); /* mode */
1899 pkt
= pack_threadid (pkt
, id
); /* threadid */
1900 *pkt
= '\0'; /* terminate */
1904 /* These values tag the fields in a thread info response packet. */
1905 /* Tagging the fields allows us to request specific fields and to
1906 add more fields as time goes by. */
1908 #define TAG_THREADID 1 /* Echo the thread identifier. */
1909 #define TAG_EXISTS 2 /* Is this process defined enough to
1910 fetch registers and its stack? */
1911 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1912 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1913 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1917 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1918 struct gdb_ext_thread_info
*info
)
1920 struct remote_state
*rs
= get_remote_state ();
1924 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1927 /* info->threadid = 0; FIXME: implement zero_threadref. */
1929 info
->display
[0] = '\0';
1930 info
->shortname
[0] = '\0';
1931 info
->more_display
[0] = '\0';
1933 /* Assume the characters indicating the packet type have been
1935 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1936 pkt
= unpack_threadid (pkt
, &ref
);
1939 warning (_("Incomplete response to threadinfo request."));
1940 if (!threadmatch (&ref
, expectedref
))
1941 { /* This is an answer to a different request. */
1942 warning (_("ERROR RMT Thread info mismatch."));
1945 copy_threadref (&info
->threadid
, &ref
);
1947 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1949 /* Packets are terminated with nulls. */
1950 while ((pkt
< limit
) && mask
&& *pkt
)
1952 pkt
= unpack_int (pkt
, &tag
); /* tag */
1953 pkt
= unpack_byte (pkt
, &length
); /* length */
1954 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1956 warning (_("ERROR RMT: threadinfo tag mismatch."));
1960 if (tag
== TAG_THREADID
)
1964 warning (_("ERROR RMT: length of threadid is not 16."));
1968 pkt
= unpack_threadid (pkt
, &ref
);
1969 mask
= mask
& ~TAG_THREADID
;
1972 if (tag
== TAG_EXISTS
)
1974 info
->active
= stub_unpack_int (pkt
, length
);
1976 mask
= mask
& ~(TAG_EXISTS
);
1979 warning (_("ERROR RMT: 'exists' length too long."));
1985 if (tag
== TAG_THREADNAME
)
1987 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1988 mask
= mask
& ~TAG_THREADNAME
;
1991 if (tag
== TAG_DISPLAY
)
1993 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1994 mask
= mask
& ~TAG_DISPLAY
;
1997 if (tag
== TAG_MOREDISPLAY
)
1999 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2000 mask
= mask
& ~TAG_MOREDISPLAY
;
2003 warning (_("ERROR RMT: unknown thread info tag."));
2004 break; /* Not a tag we know about. */
2010 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2011 struct gdb_ext_thread_info
*info
)
2013 struct remote_state
*rs
= get_remote_state ();
2016 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2018 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2020 if (rs
->buf
[0] == '\0')
2023 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2028 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2031 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2032 threadref
*nextthread
)
2034 *pkt
++ = 'q'; /* info query packet */
2035 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2036 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2037 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2038 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2043 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2046 parse_threadlist_response (char *pkt
, int result_limit
,
2047 threadref
*original_echo
, threadref
*resultlist
,
2050 struct remote_state
*rs
= get_remote_state ();
2052 int count
, resultcount
, done
;
2055 /* Assume the 'q' and 'M chars have been stripped. */
2056 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2057 /* done parse past here */
2058 pkt
= unpack_byte (pkt
, &count
); /* count field */
2059 pkt
= unpack_nibble (pkt
, &done
);
2060 /* The first threadid is the argument threadid. */
2061 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2062 while ((count
-- > 0) && (pkt
< limit
))
2064 pkt
= unpack_threadid (pkt
, resultlist
++);
2065 if (resultcount
++ >= result_limit
)
2074 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2075 int *done
, int *result_count
, threadref
*threadlist
)
2077 struct remote_state
*rs
= get_remote_state ();
2078 static threadref echo_nextthread
;
2081 /* Trancate result limit to be smaller than the packet size. */
2082 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
2083 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2085 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2087 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2089 if (*rs
->buf
== '\0')
2093 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
2096 if (!threadmatch (&echo_nextthread
, nextthread
))
2098 /* FIXME: This is a good reason to drop the packet. */
2099 /* Possably, there is a duplicate response. */
2101 retransmit immediatly - race conditions
2102 retransmit after timeout - yes
2104 wait for packet, then exit
2106 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2107 return 0; /* I choose simply exiting. */
2109 if (*result_count
<= 0)
2113 warning (_("RMT ERROR : failed to get remote thread list."));
2116 return result
; /* break; */
2118 if (*result_count
> result_limit
)
2121 warning (_("RMT ERROR: threadlist response longer than requested."));
2127 /* This is the interface between remote and threads, remotes upper
2130 /* remote_find_new_threads retrieves the thread list and for each
2131 thread in the list, looks up the thread in GDB's internal list,
2132 adding the thread if it does not already exist. This involves
2133 getting partial thread lists from the remote target so, polling the
2134 quit_flag is required. */
2137 /* About this many threadisds fit in a packet. */
2139 #define MAXTHREADLISTRESULTS 32
2142 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2145 int done
, i
, result_count
;
2149 static threadref nextthread
;
2150 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
2155 if (loopcount
++ > looplimit
)
2158 warning (_("Remote fetch threadlist -infinite loop-."));
2161 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
2162 &done
, &result_count
, resultthreadlist
))
2167 /* Clear for later iterations. */
2169 /* Setup to resume next batch of thread references, set nextthread. */
2170 if (result_count
>= 1)
2171 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2173 while (result_count
--)
2174 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2181 remote_newthread_step (threadref
*ref
, void *context
)
2183 int pid
= ptid_get_pid (inferior_ptid
);
2184 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2186 if (!in_thread_list (ptid
))
2188 return 1; /* continue iterator */
2191 #define CRAZY_MAX_THREADS 1000
2194 remote_current_thread (ptid_t oldpid
)
2196 struct remote_state
*rs
= get_remote_state ();
2202 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2203 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2204 return read_ptid (&rs
->buf
[2], NULL
);
2209 /* Find new threads for info threads command.
2210 * Original version, using John Metzler's thread protocol.
2214 remote_find_new_threads (void)
2216 remote_threadlist_iterator (remote_newthread_step
, 0,
2221 * Find all threads for info threads command.
2222 * Uses new thread protocol contributed by Cisco.
2223 * Falls back and attempts to use the older method (above)
2224 * if the target doesn't respond to the new method.
2228 remote_threads_info (struct target_ops
*ops
)
2230 struct remote_state
*rs
= get_remote_state ();
2234 if (remote_desc
== 0) /* paranoia */
2235 error (_("Command can only be used when connected to the remote target."));
2237 if (use_threadinfo_query
)
2239 putpkt ("qfThreadInfo");
2240 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2242 if (bufp
[0] != '\0') /* q packet recognized */
2244 while (*bufp
++ == 'm') /* reply contains one or more TID */
2248 new_thread
= read_ptid (bufp
, &bufp
);
2249 if (!ptid_equal (new_thread
, null_ptid
))
2251 /* In non-stop mode, we assume new found threads
2252 are running until proven otherwise with a
2253 stop reply. In all-stop, we can only get
2254 here if all threads are stopped. */
2255 int running
= non_stop
? 1 : 0;
2257 remote_notice_new_inferior (new_thread
, running
);
2260 while (*bufp
++ == ','); /* comma-separated list */
2261 putpkt ("qsThreadInfo");
2262 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2269 /* Only qfThreadInfo is supported in non-stop mode. */
2273 /* Else fall back to old method based on jmetzler protocol. */
2274 use_threadinfo_query
= 0;
2275 remote_find_new_threads ();
2280 * Collect a descriptive string about the given thread.
2281 * The target may say anything it wants to about the thread
2282 * (typically info about its blocked / runnable state, name, etc.).
2283 * This string will appear in the info threads display.
2285 * Optional: targets are not required to implement this function.
2289 remote_threads_extra_info (struct thread_info
*tp
)
2291 struct remote_state
*rs
= get_remote_state ();
2295 struct gdb_ext_thread_info threadinfo
;
2296 static char display_buf
[100]; /* arbitrary... */
2297 int n
= 0; /* position in display_buf */
2299 if (remote_desc
== 0) /* paranoia */
2300 internal_error (__FILE__
, __LINE__
,
2301 _("remote_threads_extra_info"));
2303 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2304 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2305 /* This is the main thread which was added by GDB. The remote
2306 server doesn't know about it. */
2309 if (use_threadextra_query
)
2312 char *endb
= rs
->buf
+ get_remote_packet_size ();
2314 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2316 write_ptid (b
, endb
, tp
->ptid
);
2319 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2320 if (rs
->buf
[0] != 0)
2322 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2323 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2324 display_buf
[result
] = '\0';
2329 /* If the above query fails, fall back to the old method. */
2330 use_threadextra_query
= 0;
2331 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2332 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2333 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2334 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2335 if (threadinfo
.active
)
2337 if (*threadinfo
.shortname
)
2338 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2339 " Name: %s,", threadinfo
.shortname
);
2340 if (*threadinfo
.display
)
2341 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2342 " State: %s,", threadinfo
.display
);
2343 if (*threadinfo
.more_display
)
2344 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2345 " Priority: %s", threadinfo
.more_display
);
2349 /* For purely cosmetic reasons, clear up trailing commas. */
2350 if (',' == display_buf
[n
-1])
2351 display_buf
[n
-1] = ' ';
2359 /* Restart the remote side; this is an extended protocol operation. */
2362 extended_remote_restart (void)
2364 struct remote_state
*rs
= get_remote_state ();
2366 /* Send the restart command; for reasons I don't understand the
2367 remote side really expects a number after the "R". */
2368 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2371 remote_fileio_reset ();
2374 /* Clean up connection to a remote debugger. */
2377 remote_close (int quitting
)
2379 if (remote_desc
== NULL
)
2380 return; /* already closed */
2382 /* Make sure we leave stdin registered in the event loop, and we
2383 don't leave the async SIGINT signal handler installed. */
2384 remote_terminal_ours ();
2386 serial_close (remote_desc
);
2389 /* We don't have a connection to the remote stub anymore. Get rid
2390 of all the inferiors and their threads we were controlling. */
2391 discard_all_inferiors ();
2393 /* We're no longer interested in any of these events. */
2394 discard_pending_stop_replies (-1);
2396 if (remote_async_inferior_event_token
)
2397 delete_async_event_handler (&remote_async_inferior_event_token
);
2398 if (remote_async_get_pending_events_token
)
2399 delete_async_event_handler (&remote_async_get_pending_events_token
);
2402 /* Query the remote side for the text, data and bss offsets. */
2407 struct remote_state
*rs
= get_remote_state ();
2410 int lose
, num_segments
= 0, do_sections
, do_segments
;
2411 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2412 struct section_offsets
*offs
;
2413 struct symfile_segment_data
*data
;
2415 if (symfile_objfile
== NULL
)
2418 putpkt ("qOffsets");
2419 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2422 if (buf
[0] == '\000')
2423 return; /* Return silently. Stub doesn't support
2427 warning (_("Remote failure reply: %s"), buf
);
2431 /* Pick up each field in turn. This used to be done with scanf, but
2432 scanf will make trouble if CORE_ADDR size doesn't match
2433 conversion directives correctly. The following code will work
2434 with any size of CORE_ADDR. */
2435 text_addr
= data_addr
= bss_addr
= 0;
2439 if (strncmp (ptr
, "Text=", 5) == 0)
2442 /* Don't use strtol, could lose on big values. */
2443 while (*ptr
&& *ptr
!= ';')
2444 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2446 if (strncmp (ptr
, ";Data=", 6) == 0)
2449 while (*ptr
&& *ptr
!= ';')
2450 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2455 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2458 while (*ptr
&& *ptr
!= ';')
2459 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2461 if (bss_addr
!= data_addr
)
2462 warning (_("Target reported unsupported offsets: %s"), buf
);
2467 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
2470 /* Don't use strtol, could lose on big values. */
2471 while (*ptr
&& *ptr
!= ';')
2472 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2475 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
2478 while (*ptr
&& *ptr
!= ';')
2479 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2487 error (_("Malformed response to offset query, %s"), buf
);
2488 else if (*ptr
!= '\0')
2489 warning (_("Target reported unsupported offsets: %s"), buf
);
2491 offs
= ((struct section_offsets
*)
2492 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2493 memcpy (offs
, symfile_objfile
->section_offsets
,
2494 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2496 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
2497 do_segments
= (data
!= NULL
);
2498 do_sections
= num_segments
== 0;
2500 if (num_segments
> 0)
2502 segments
[0] = text_addr
;
2503 segments
[1] = data_addr
;
2505 /* If we have two segments, we can still try to relocate everything
2506 by assuming that the .text and .data offsets apply to the whole
2507 text and data segments. Convert the offsets given in the packet
2508 to base addresses for symfile_map_offsets_to_segments. */
2509 else if (data
&& data
->num_segments
== 2)
2511 segments
[0] = data
->segment_bases
[0] + text_addr
;
2512 segments
[1] = data
->segment_bases
[1] + data_addr
;
2515 /* If the object file has only one segment, assume that it is text
2516 rather than data; main programs with no writable data are rare,
2517 but programs with no code are useless. Of course the code might
2518 have ended up in the data segment... to detect that we would need
2519 the permissions here. */
2520 else if (data
&& data
->num_segments
== 1)
2522 segments
[0] = data
->segment_bases
[0] + text_addr
;
2525 /* There's no way to relocate by segment. */
2531 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
2532 offs
, num_segments
, segments
);
2534 if (ret
== 0 && !do_sections
)
2535 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2542 free_symfile_segment_data (data
);
2546 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2548 /* This is a temporary kludge to force data and bss to use the same offsets
2549 because that's what nlmconv does now. The real solution requires changes
2550 to the stub and remote.c that I don't have time to do right now. */
2552 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2553 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2556 objfile_relocate (symfile_objfile
, offs
);
2559 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2560 threads we know are stopped already. This is used during the
2561 initial remote connection in non-stop mode --- threads that are
2562 reported as already being stopped are left stopped. */
2565 set_stop_requested_callback (struct thread_info
*thread
, void *data
)
2567 /* If we have a stop reply for this thread, it must be stopped. */
2568 if (peek_stop_reply (thread
->ptid
))
2569 set_stop_requested (thread
->ptid
, 1);
2574 /* Stub for catch_exception. */
2576 struct start_remote_args
2580 /* The current target. */
2581 struct target_ops
*target
;
2583 /* Non-zero if this is an extended-remote target. */
2588 remote_start_remote (struct ui_out
*uiout
, void *opaque
)
2590 struct start_remote_args
*args
= opaque
;
2591 struct remote_state
*rs
= get_remote_state ();
2592 struct packet_config
*noack_config
;
2593 char *wait_status
= NULL
;
2595 immediate_quit
++; /* Allow user to interrupt it. */
2597 /* Ack any packet which the remote side has already sent. */
2598 serial_write (remote_desc
, "+", 1);
2600 /* The first packet we send to the target is the optional "supported
2601 packets" request. If the target can answer this, it will tell us
2602 which later probes to skip. */
2603 remote_query_supported ();
2605 /* Next, we possibly activate noack mode.
2607 If the QStartNoAckMode packet configuration is set to AUTO,
2608 enable noack mode if the stub reported a wish for it with
2611 If set to TRUE, then enable noack mode even if the stub didn't
2612 report it in qSupported. If the stub doesn't reply OK, the
2613 session ends with an error.
2615 If FALSE, then don't activate noack mode, regardless of what the
2616 stub claimed should be the default with qSupported. */
2618 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
2620 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
2621 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
2622 && noack_config
->support
== PACKET_ENABLE
))
2624 putpkt ("QStartNoAckMode");
2625 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2626 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
2630 if (args
->extended_p
)
2632 /* Tell the remote that we are using the extended protocol. */
2634 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2637 /* Next, if the target can specify a description, read it. We do
2638 this before anything involving memory or registers. */
2639 target_find_description ();
2641 /* On OSs where the list of libraries is global to all
2642 processes, we fetch them early. */
2643 if (gdbarch_has_global_solist (target_gdbarch
))
2644 solib_add (NULL
, args
->from_tty
, args
->target
, auto_solib_add
);
2648 if (!rs
->non_stop_aware
)
2649 error (_("Non-stop mode requested, but remote does not support non-stop"));
2651 putpkt ("QNonStop:1");
2652 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2654 if (strcmp (rs
->buf
, "OK") != 0)
2655 error ("Remote refused setting non-stop mode with: %s", rs
->buf
);
2657 /* Find about threads and processes the stub is already
2658 controlling. We default to adding them in the running state.
2659 The '?' query below will then tell us about which threads are
2661 remote_threads_info (args
->target
);
2663 else if (rs
->non_stop_aware
)
2665 /* Don't assume that the stub can operate in all-stop mode.
2666 Request it explicitely. */
2667 putpkt ("QNonStop:0");
2668 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2670 if (strcmp (rs
->buf
, "OK") != 0)
2671 error ("Remote refused setting all-stop mode with: %s", rs
->buf
);
2674 /* Check whether the target is running now. */
2676 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2680 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
2682 if (!args
->extended_p
)
2683 error (_("The target is not running (try extended-remote?)"));
2685 /* We're connected, but not running. Drop out before we
2686 call start_remote. */
2691 /* Save the reply for later. */
2692 wait_status
= alloca (strlen (rs
->buf
) + 1);
2693 strcpy (wait_status
, rs
->buf
);
2696 /* Let the stub know that we want it to return the thread. */
2697 set_continue_thread (minus_one_ptid
);
2699 /* Without this, some commands which require an active target
2700 (such as kill) won't work. This variable serves (at least)
2701 double duty as both the pid of the target process (if it has
2702 such), and as a flag indicating that a target is active.
2703 These functions should be split out into seperate variables,
2704 especially since GDB will someday have a notion of debugging
2705 several processes. */
2706 inferior_ptid
= magic_null_ptid
;
2708 /* Now, if we have thread information, update inferior_ptid. */
2709 inferior_ptid
= remote_current_thread (inferior_ptid
);
2711 remote_add_inferior (ptid_get_pid (inferior_ptid
), -1);
2713 /* Always add the main thread. */
2714 add_thread_silent (inferior_ptid
);
2716 get_offsets (); /* Get text, data & bss offsets. */
2718 /* If we could not find a description using qXfer, and we know
2719 how to do it some other way, try again. This is not
2720 supported for non-stop; it could be, but it is tricky if
2721 there are no stopped threads when we connect. */
2722 if (remote_read_description_p (args
->target
)
2723 && gdbarch_target_desc (target_gdbarch
) == NULL
)
2725 target_clear_description ();
2726 target_find_description ();
2729 /* Use the previously fetched status. */
2730 gdb_assert (wait_status
!= NULL
);
2731 strcpy (rs
->buf
, wait_status
);
2732 rs
->cached_wait_status
= 1;
2735 start_remote (args
->from_tty
); /* Initialize gdb process mechanisms. */
2739 /* Clear WFI global state. Do this before finding about new
2740 threads and inferiors, and setting the current inferior.
2741 Otherwise we would clear the proceed status of the current
2742 inferior when we want its stop_soon state to be preserved
2743 (see notice_new_inferior). */
2744 init_wait_for_inferior ();
2746 /* In non-stop, we will either get an "OK", meaning that there
2747 are no stopped threads at this time; or, a regular stop
2748 reply. In the latter case, there may be more than one thread
2749 stopped --- we pull them all out using the vStopped
2751 if (strcmp (rs
->buf
, "OK") != 0)
2753 struct stop_reply
*stop_reply
;
2754 struct cleanup
*old_chain
;
2756 stop_reply
= stop_reply_xmalloc ();
2757 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
2759 remote_parse_stop_reply (rs
->buf
, stop_reply
);
2760 discard_cleanups (old_chain
);
2762 /* get_pending_stop_replies acks this one, and gets the rest
2764 pending_stop_reply
= stop_reply
;
2765 remote_get_pending_stop_replies ();
2767 /* Make sure that threads that were stopped remain
2769 iterate_over_threads (set_stop_requested_callback
, NULL
);
2772 if (target_can_async_p ())
2773 target_async (inferior_event_handler
, 0);
2775 if (thread_count () == 0)
2777 if (!args
->extended_p
)
2778 error (_("The target is not running (try extended-remote?)"));
2780 /* We're connected, but not running. Drop out before we
2781 call start_remote. */
2785 /* Let the stub know that we want it to return the thread. */
2787 /* Force the stub to choose a thread. */
2788 set_general_thread (null_ptid
);
2791 inferior_ptid
= remote_current_thread (minus_one_ptid
);
2792 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
2793 error (_("remote didn't report the current thread in non-stop mode"));
2795 get_offsets (); /* Get text, data & bss offsets. */
2797 /* In non-stop mode, any cached wait status will be stored in
2798 the stop reply queue. */
2799 gdb_assert (wait_status
== NULL
);
2802 /* If we connected to a live target, do some additional setup. */
2803 if (target_has_execution
)
2805 if (exec_bfd
) /* No use without an exec file. */
2806 remote_check_symbols (symfile_objfile
);
2809 /* If breakpoints are global, insert them now. */
2810 if (gdbarch_has_global_breakpoints (target_gdbarch
)
2811 && breakpoints_always_inserted_mode ())
2812 insert_breakpoints ();
2815 /* Open a connection to a remote debugger.
2816 NAME is the filename used for communication. */
2819 remote_open (char *name
, int from_tty
)
2821 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2824 /* Open a connection to a remote debugger using the extended
2825 remote gdb protocol. NAME is the filename used for communication. */
2828 extended_remote_open (char *name
, int from_tty
)
2830 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
2833 /* Generic code for opening a connection to a remote target. */
2836 init_all_packet_configs (void)
2839 for (i
= 0; i
< PACKET_MAX
; i
++)
2840 update_packet_config (&remote_protocol_packets
[i
]);
2843 /* Symbol look-up. */
2846 remote_check_symbols (struct objfile
*objfile
)
2848 struct remote_state
*rs
= get_remote_state ();
2849 char *msg
, *reply
, *tmp
;
2850 struct minimal_symbol
*sym
;
2853 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2856 /* Make sure the remote is pointing at the right process. */
2857 set_general_process ();
2859 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2860 because we need both at the same time. */
2861 msg
= alloca (get_remote_packet_size ());
2863 /* Invite target to request symbol lookups. */
2865 putpkt ("qSymbol::");
2866 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2867 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2870 while (strncmp (reply
, "qSymbol:", 8) == 0)
2873 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2875 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2877 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2880 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
2882 /* If this is a function address, return the start of code
2883 instead of any data function descriptor. */
2884 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
2888 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2889 paddr_nz (sym_addr
), &reply
[8]);
2893 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2898 static struct serial
*
2899 remote_serial_open (char *name
)
2901 static int udp_warning
= 0;
2903 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2904 of in ser-tcp.c, because it is the remote protocol assuming that the
2905 serial connection is reliable and not the serial connection promising
2907 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2910 The remote protocol may be unreliable over UDP.\n\
2911 Some events may be lost, rendering further debugging impossible."));
2915 return serial_open (name
);
2918 /* This type describes each known response to the qSupported
2920 struct protocol_feature
2922 /* The name of this protocol feature. */
2925 /* The default for this protocol feature. */
2926 enum packet_support default_support
;
2928 /* The function to call when this feature is reported, or after
2929 qSupported processing if the feature is not supported.
2930 The first argument points to this structure. The second
2931 argument indicates whether the packet requested support be
2932 enabled, disabled, or probed (or the default, if this function
2933 is being called at the end of processing and this feature was
2934 not reported). The third argument may be NULL; if not NULL, it
2935 is a NUL-terminated string taken from the packet following
2936 this feature's name and an equals sign. */
2937 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2940 /* The corresponding packet for this feature. Only used if
2941 FUNC is remote_supported_packet. */
2946 remote_supported_packet (const struct protocol_feature
*feature
,
2947 enum packet_support support
,
2948 const char *argument
)
2952 warning (_("Remote qSupported response supplied an unexpected value for"
2953 " \"%s\"."), feature
->name
);
2957 if (remote_protocol_packets
[feature
->packet
].support
2958 == PACKET_SUPPORT_UNKNOWN
)
2959 remote_protocol_packets
[feature
->packet
].support
= support
;
2963 remote_packet_size (const struct protocol_feature
*feature
,
2964 enum packet_support support
, const char *value
)
2966 struct remote_state
*rs
= get_remote_state ();
2971 if (support
!= PACKET_ENABLE
)
2974 if (value
== NULL
|| *value
== '\0')
2976 warning (_("Remote target reported \"%s\" without a size."),
2982 packet_size
= strtol (value
, &value_end
, 16);
2983 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2985 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2986 feature
->name
, value
);
2990 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2992 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2993 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2994 packet_size
= MAX_REMOTE_PACKET_SIZE
;
2997 /* Record the new maximum packet size. */
2998 rs
->explicit_packet_size
= packet_size
;
3002 remote_multi_process_feature (const struct protocol_feature
*feature
,
3003 enum packet_support support
, const char *value
)
3005 struct remote_state
*rs
= get_remote_state ();
3006 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
3010 remote_non_stop_feature (const struct protocol_feature
*feature
,
3011 enum packet_support support
, const char *value
)
3013 struct remote_state
*rs
= get_remote_state ();
3014 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
3017 static struct protocol_feature remote_protocol_features
[] = {
3018 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
3019 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
3020 PACKET_qXfer_auxv
},
3021 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
3022 PACKET_qXfer_features
},
3023 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
3024 PACKET_qXfer_libraries
},
3025 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
3026 PACKET_qXfer_memory_map
},
3027 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
3028 PACKET_qXfer_spu_read
},
3029 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
3030 PACKET_qXfer_spu_write
},
3031 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
3032 PACKET_qXfer_osdata
},
3033 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
3034 PACKET_QPassSignals
},
3035 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
3036 PACKET_QStartNoAckMode
},
3037 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
3038 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
3039 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
3040 PACKET_qXfer_siginfo_read
},
3041 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
3042 PACKET_qXfer_siginfo_write
},
3046 remote_query_supported (void)
3048 struct remote_state
*rs
= get_remote_state ();
3051 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3053 /* The packet support flags are handled differently for this packet
3054 than for most others. We treat an error, a disabled packet, and
3055 an empty response identically: any features which must be reported
3056 to be used will be automatically disabled. An empty buffer
3057 accomplishes this, since that is also the representation for a list
3058 containing no features. */
3061 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3064 putpkt ("qSupported:multiprocess+");
3066 putpkt ("qSupported");
3068 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3070 /* If an error occured, warn, but do not return - just reset the
3071 buffer to empty and go on to disable features. */
3072 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3075 warning (_("Remote failure reply: %s"), rs
->buf
);
3080 memset (seen
, 0, sizeof (seen
));
3085 enum packet_support is_supported
;
3086 char *p
, *end
, *name_end
, *value
;
3088 /* First separate out this item from the rest of the packet. If
3089 there's another item after this, we overwrite the separator
3090 (terminated strings are much easier to work with). */
3092 end
= strchr (p
, ';');
3095 end
= p
+ strlen (p
);
3105 warning (_("empty item in \"qSupported\" response"));
3110 name_end
= strchr (p
, '=');
3113 /* This is a name=value entry. */
3114 is_supported
= PACKET_ENABLE
;
3115 value
= name_end
+ 1;
3124 is_supported
= PACKET_ENABLE
;
3128 is_supported
= PACKET_DISABLE
;
3132 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3136 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
3142 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3143 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3145 const struct protocol_feature
*feature
;
3148 feature
= &remote_protocol_features
[i
];
3149 feature
->func (feature
, is_supported
, value
);
3154 /* If we increased the packet size, make sure to increase the global
3155 buffer size also. We delay this until after parsing the entire
3156 qSupported packet, because this is the same buffer we were
3158 if (rs
->buf_size
< rs
->explicit_packet_size
)
3160 rs
->buf_size
= rs
->explicit_packet_size
;
3161 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3164 /* Handle the defaults for unmentioned features. */
3165 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3168 const struct protocol_feature
*feature
;
3170 feature
= &remote_protocol_features
[i
];
3171 feature
->func (feature
, feature
->default_support
, NULL
);
3177 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
, int extended_p
)
3179 struct remote_state
*rs
= get_remote_state ();
3182 error (_("To open a remote debug connection, you need to specify what\n"
3183 "serial device is attached to the remote system\n"
3184 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3186 /* See FIXME above. */
3187 if (!target_async_permitted
)
3188 wait_forever_enabled_p
= 1;
3190 /* If we're connected to a running target, target_preopen will kill it.
3191 But if we're connected to a target system with no running process,
3192 then we will still be connected when it returns. Ask this question
3193 first, before target_preopen has a chance to kill anything. */
3194 if (remote_desc
!= NULL
&& !have_inferiors ())
3197 || query (_("Already connected to a remote target. Disconnect? ")))
3200 error (_("Still connected."));
3203 target_preopen (from_tty
);
3205 unpush_target (target
);
3207 /* This time without a query. If we were connected to an
3208 extended-remote target and target_preopen killed the running
3209 process, we may still be connected. If we are starting "target
3210 remote" now, the extended-remote target will not have been
3211 removed by unpush_target. */
3212 if (remote_desc
!= NULL
&& !have_inferiors ())
3215 /* Make sure we send the passed signals list the next time we resume. */
3216 xfree (last_pass_packet
);
3217 last_pass_packet
= NULL
;
3219 remote_fileio_reset ();
3220 reopen_exec_file ();
3223 remote_desc
= remote_serial_open (name
);
3225 perror_with_name (name
);
3227 if (baud_rate
!= -1)
3229 if (serial_setbaudrate (remote_desc
, baud_rate
))
3231 /* The requested speed could not be set. Error out to
3232 top level after closing remote_desc. Take care to
3233 set remote_desc to NULL to avoid closing remote_desc
3235 serial_close (remote_desc
);
3237 perror_with_name (name
);
3241 serial_raw (remote_desc
);
3243 /* If there is something sitting in the buffer we might take it as a
3244 response to a command, which would be bad. */
3245 serial_flush_input (remote_desc
);
3249 puts_filtered ("Remote debugging using ");
3250 puts_filtered (name
);
3251 puts_filtered ("\n");
3253 push_target (target
); /* Switch to using remote target now. */
3255 /* Register extra event sources in the event loop. */
3256 remote_async_inferior_event_token
3257 = create_async_event_handler (remote_async_inferior_event_handler
,
3259 remote_async_get_pending_events_token
3260 = create_async_event_handler (remote_async_get_pending_events_handler
,
3263 /* Reset the target state; these things will be queried either by
3264 remote_query_supported or as they are needed. */
3265 init_all_packet_configs ();
3266 rs
->cached_wait_status
= 0;
3267 rs
->explicit_packet_size
= 0;
3269 rs
->multi_process_aware
= 0;
3270 rs
->extended
= extended_p
;
3271 rs
->non_stop_aware
= 0;
3272 rs
->waiting_for_stop_reply
= 0;
3274 general_thread
= not_sent_ptid
;
3275 continue_thread
= not_sent_ptid
;
3277 /* Probe for ability to use "ThreadInfo" query, as required. */
3278 use_threadinfo_query
= 1;
3279 use_threadextra_query
= 1;
3281 if (target_async_permitted
)
3283 /* With this target we start out by owning the terminal. */
3284 remote_async_terminal_ours_p
= 1;
3286 /* FIXME: cagney/1999-09-23: During the initial connection it is
3287 assumed that the target is already ready and able to respond to
3288 requests. Unfortunately remote_start_remote() eventually calls
3289 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3290 around this. Eventually a mechanism that allows
3291 wait_for_inferior() to expect/get timeouts will be
3293 wait_forever_enabled_p
= 0;
3296 /* First delete any symbols previously loaded from shared libraries. */
3297 no_shared_libraries (NULL
, 0);
3300 init_thread_list ();
3302 /* Start the remote connection. If error() or QUIT, discard this
3303 target (we'd otherwise be in an inconsistent state) and then
3304 propogate the error on up the exception chain. This ensures that
3305 the caller doesn't stumble along blindly assuming that the
3306 function succeeded. The CLI doesn't have this problem but other
3307 UI's, such as MI do.
3309 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3310 this function should return an error indication letting the
3311 caller restore the previous state. Unfortunately the command
3312 ``target remote'' is directly wired to this function making that
3313 impossible. On a positive note, the CLI side of this problem has
3314 been fixed - the function set_cmd_context() makes it possible for
3315 all the ``target ....'' commands to share a common callback
3316 function. See cli-dump.c. */
3318 struct gdb_exception ex
;
3319 struct start_remote_args args
;
3321 args
.from_tty
= from_tty
;
3322 args
.target
= target
;
3323 args
.extended_p
= extended_p
;
3325 ex
= catch_exception (uiout
, remote_start_remote
, &args
, RETURN_MASK_ALL
);
3328 /* Pop the partially set up target - unless something else did
3329 already before throwing the exception. */
3330 if (remote_desc
!= NULL
)
3332 if (target_async_permitted
)
3333 wait_forever_enabled_p
= 1;
3334 throw_exception (ex
);
3338 if (target_async_permitted
)
3339 wait_forever_enabled_p
= 1;
3342 /* This takes a program previously attached to and detaches it. After
3343 this is done, GDB can be used to debug some other program. We
3344 better not have left any breakpoints in the target program or it'll
3345 die when it hits one. */
3348 remote_detach_1 (char *args
, int from_tty
, int extended
)
3350 int pid
= ptid_get_pid (inferior_ptid
);
3351 struct remote_state
*rs
= get_remote_state ();
3354 error (_("Argument given to \"detach\" when remotely debugging."));
3356 if (!target_has_execution
)
3357 error (_("No process to detach from."));
3359 /* Tell the remote target to detach. */
3360 if (remote_multi_process_p (rs
))
3361 sprintf (rs
->buf
, "D;%x", pid
);
3363 strcpy (rs
->buf
, "D");
3366 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3368 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
3370 else if (rs
->buf
[0] == '\0')
3371 error (_("Remote doesn't know how to detach"));
3373 error (_("Can't detach process."));
3377 if (remote_multi_process_p (rs
))
3378 printf_filtered (_("Detached from remote %s.\n"),
3379 target_pid_to_str (pid_to_ptid (pid
)));
3383 puts_filtered (_("Detached from remote process.\n"));
3385 puts_filtered (_("Ending remote debugging.\n"));
3389 discard_pending_stop_replies (pid
);
3390 target_mourn_inferior ();
3394 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3396 remote_detach_1 (args
, from_tty
, 0);
3400 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3402 remote_detach_1 (args
, from_tty
, 1);
3405 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3408 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
3411 error (_("Argument given to \"disconnect\" when remotely debugging."));
3413 /* Make sure we unpush even the extended remote targets; mourn
3414 won't do it. So call remote_mourn_1 directly instead of
3415 target_mourn_inferior. */
3416 remote_mourn_1 (target
);
3419 puts_filtered ("Ending remote debugging.\n");
3422 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3423 be chatty about it. */
3426 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
3428 struct remote_state
*rs
= get_remote_state ();
3431 char *wait_status
= NULL
;
3434 error_no_arg (_("process-id to attach"));
3437 pid
= strtol (args
, &dummy
, 0);
3438 /* Some targets don't set errno on errors, grrr! */
3439 if (pid
== 0 && args
== dummy
)
3440 error (_("Illegal process-id: %s."), args
);
3442 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3443 error (_("This target does not support attaching to a process"));
3445 sprintf (rs
->buf
, "vAttach;%x", pid
);
3447 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3449 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
3452 printf_unfiltered (_("Attached to %s\n"),
3453 target_pid_to_str (pid_to_ptid (pid
)));
3457 /* Save the reply for later. */
3458 wait_status
= alloca (strlen (rs
->buf
) + 1);
3459 strcpy (wait_status
, rs
->buf
);
3461 else if (strcmp (rs
->buf
, "OK") != 0)
3462 error (_("Attaching to %s failed with: %s"),
3463 target_pid_to_str (pid_to_ptid (pid
)),
3466 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3467 error (_("This target does not support attaching to a process"));
3469 error (_("Attaching to %s failed"),
3470 target_pid_to_str (pid_to_ptid (pid
)));
3472 remote_add_inferior (pid
, 1);
3474 inferior_ptid
= pid_to_ptid (pid
);
3478 struct thread_info
*thread
;
3480 /* Get list of threads. */
3481 remote_threads_info (target
);
3483 thread
= first_thread_of_process (pid
);
3485 inferior_ptid
= thread
->ptid
;
3487 inferior_ptid
= pid_to_ptid (pid
);
3489 /* Invalidate our notion of the remote current thread. */
3490 record_currthread (minus_one_ptid
);
3494 /* Now, if we have thread information, update inferior_ptid. */
3495 inferior_ptid
= remote_current_thread (inferior_ptid
);
3497 /* Add the main thread to the thread list. */
3498 add_thread_silent (inferior_ptid
);
3501 /* Next, if the target can specify a description, read it. We do
3502 this before anything involving memory or registers. */
3503 target_find_description ();
3507 /* Use the previously fetched status. */
3508 gdb_assert (wait_status
!= NULL
);
3510 if (target_can_async_p ())
3512 struct stop_reply
*stop_reply
;
3513 struct cleanup
*old_chain
;
3515 stop_reply
= stop_reply_xmalloc ();
3516 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3517 remote_parse_stop_reply (wait_status
, stop_reply
);
3518 discard_cleanups (old_chain
);
3519 push_stop_reply (stop_reply
);
3521 target_async (inferior_event_handler
, 0);
3525 gdb_assert (wait_status
!= NULL
);
3526 strcpy (rs
->buf
, wait_status
);
3527 rs
->cached_wait_status
= 1;
3531 gdb_assert (wait_status
== NULL
);
3535 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3537 extended_remote_attach_1 (ops
, args
, from_tty
);
3540 /* Convert hex digit A to a number. */
3545 if (a
>= '0' && a
<= '9')
3547 else if (a
>= 'a' && a
<= 'f')
3548 return a
- 'a' + 10;
3549 else if (a
>= 'A' && a
<= 'F')
3550 return a
- 'A' + 10;
3552 error (_("Reply contains invalid hex digit %d"), a
);
3556 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
3560 for (i
= 0; i
< count
; i
++)
3562 if (hex
[0] == 0 || hex
[1] == 0)
3564 /* Hex string is short, or of uneven length.
3565 Return the count that has been converted so far. */
3568 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
3574 /* Convert number NIB to a hex digit. */
3582 return 'a' + nib
- 10;
3586 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
3589 /* May use a length, or a nul-terminated string as input. */
3591 count
= strlen ((char *) bin
);
3593 for (i
= 0; i
< count
; i
++)
3595 *hex
++ = tohex ((*bin
>> 4) & 0xf);
3596 *hex
++ = tohex (*bin
++ & 0xf);
3602 /* Check for the availability of vCont. This function should also check
3606 remote_vcont_probe (struct remote_state
*rs
)
3610 strcpy (rs
->buf
, "vCont?");
3612 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3615 /* Make sure that the features we assume are supported. */
3616 if (strncmp (buf
, "vCont", 5) == 0)
3619 int support_s
, support_S
, support_c
, support_C
;
3625 rs
->support_vCont_t
= 0;
3626 while (p
&& *p
== ';')
3629 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3631 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3633 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3635 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3637 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3638 rs
->support_vCont_t
= 1;
3640 p
= strchr (p
, ';');
3643 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3644 BUF will make packet_ok disable the packet. */
3645 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
3649 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
3652 /* Helper function for building "vCont" resumptions. Write a
3653 resumption to P. ENDP points to one-passed-the-end of the buffer
3654 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
3655 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
3656 resumed thread should be single-stepped and/or signalled. If PTID
3657 equals minus_one_ptid, then all threads are resumed; if PTID
3658 represents a process, then all threads of the process are resumed;
3659 the thread to be stepped and/or signalled is given in the global
3663 append_resumption (char *p
, char *endp
,
3664 ptid_t ptid
, int step
, enum target_signal siggnal
)
3666 struct remote_state
*rs
= get_remote_state ();
3668 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3669 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
3671 p
+= xsnprintf (p
, endp
- p
, ";s");
3672 else if (siggnal
!= TARGET_SIGNAL_0
)
3673 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
3675 p
+= xsnprintf (p
, endp
- p
, ";c");
3677 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
3681 /* All (-1) threads of process. */
3682 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3684 p
+= xsnprintf (p
, endp
- p
, ":");
3685 p
= write_ptid (p
, endp
, nptid
);
3687 else if (!ptid_equal (ptid
, minus_one_ptid
))
3689 p
+= xsnprintf (p
, endp
- p
, ":");
3690 p
= write_ptid (p
, endp
, ptid
);
3696 /* Resume the remote inferior by using a "vCont" packet. The thread
3697 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3698 resumed thread should be single-stepped and/or signalled. If PTID
3699 equals minus_one_ptid, then all threads are resumed; the thread to
3700 be stepped and/or signalled is given in the global INFERIOR_PTID.
3701 This function returns non-zero iff it resumes the inferior.
3703 This function issues a strict subset of all possible vCont commands at the
3707 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
3709 struct remote_state
*rs
= get_remote_state ();
3713 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3714 remote_vcont_probe (rs
);
3716 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
3720 endp
= rs
->buf
+ get_remote_packet_size ();
3722 /* If we could generate a wider range of packets, we'd have to worry
3723 about overflowing BUF. Should there be a generic
3724 "multi-part-packet" packet? */
3726 p
+= xsnprintf (p
, endp
- p
, "vCont");
3728 if (ptid_equal (ptid
, magic_null_ptid
))
3730 /* MAGIC_NULL_PTID means that we don't have any active threads,
3731 so we don't have any TID numbers the inferior will
3732 understand. Make sure to only send forms that do not specify
3734 p
= append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
3736 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
3738 /* Resume all threads (of all processes, or of a single
3739 process), with preference for INFERIOR_PTID. This assumes
3740 inferior_ptid belongs to the set of all threads we are about
3742 if (step
|| siggnal
!= TARGET_SIGNAL_0
)
3744 /* Step inferior_ptid, with or without signal. */
3745 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
3748 /* And continue others without a signal. */
3749 p
= append_resumption (p
, endp
, ptid
, /*step=*/ 0, TARGET_SIGNAL_0
);
3753 /* Scheduler locking; resume only PTID. */
3754 p
= append_resumption (p
, endp
, ptid
, step
, siggnal
);
3757 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
3762 /* In non-stop, the stub replies to vCont with "OK". The stop
3763 reply will be reported asynchronously by means of a `%Stop'
3765 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3766 if (strcmp (rs
->buf
, "OK") != 0)
3767 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
3773 /* Tell the remote machine to resume. */
3775 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
3777 static int last_sent_step
;
3780 remote_resume (struct target_ops
*ops
,
3781 ptid_t ptid
, int step
, enum target_signal siggnal
)
3783 struct remote_state
*rs
= get_remote_state ();
3786 last_sent_signal
= siggnal
;
3787 last_sent_step
= step
;
3789 /* Update the inferior on signals to silently pass, if they've changed. */
3790 remote_pass_signals ();
3792 /* The vCont packet doesn't need to specify threads via Hc. */
3793 if (remote_vcont_resume (ptid
, step
, siggnal
))
3796 /* All other supported resume packets do use Hc, so set the continue
3798 if (ptid_equal (ptid
, minus_one_ptid
))
3799 set_continue_thread (any_thread_ptid
);
3801 set_continue_thread (ptid
);
3804 if (execution_direction
== EXEC_REVERSE
)
3806 /* We don't pass signals to the target in reverse exec mode. */
3807 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
3808 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
3810 strcpy (buf
, step
? "bs" : "bc");
3812 else if (siggnal
!= TARGET_SIGNAL_0
)
3814 buf
[0] = step
? 'S' : 'C';
3815 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
3816 buf
[2] = tohex (((int) siggnal
) & 0xf);
3820 strcpy (buf
, step
? "s" : "c");
3825 /* We are about to start executing the inferior, let's register it
3826 with the event loop. NOTE: this is the one place where all the
3827 execution commands end up. We could alternatively do this in each
3828 of the execution commands in infcmd.c. */
3829 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3830 into infcmd.c in order to allow inferior function calls to work
3831 NOT asynchronously. */
3832 if (target_can_async_p ())
3833 target_async (inferior_event_handler
, 0);
3835 /* We've just told the target to resume. The remote server will
3836 wait for the inferior to stop, and then send a stop reply. In
3837 the mean time, we can't start another command/query ourselves
3838 because the stub wouldn't be ready to process it. This applies
3839 only to the base all-stop protocol, however. In non-stop (which
3840 only supports vCont), the stub replies with an "OK", and is
3841 immediate able to process further serial input. */
3843 rs
->waiting_for_stop_reply
= 1;
3847 /* Set up the signal handler for SIGINT, while the target is
3848 executing, ovewriting the 'regular' SIGINT signal handler. */
3850 initialize_sigint_signal_handler (void)
3852 signal (SIGINT
, handle_remote_sigint
);
3855 /* Signal handler for SIGINT, while the target is executing. */
3857 handle_remote_sigint (int sig
)
3859 signal (sig
, handle_remote_sigint_twice
);
3860 mark_async_signal_handler_wrapper (sigint_remote_token
);
3863 /* Signal handler for SIGINT, installed after SIGINT has already been
3864 sent once. It will take effect the second time that the user sends
3867 handle_remote_sigint_twice (int sig
)
3869 signal (sig
, handle_remote_sigint
);
3870 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
3873 /* Perform the real interruption of the target execution, in response
3876 async_remote_interrupt (gdb_client_data arg
)
3879 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
3881 target_stop (inferior_ptid
);
3884 /* Perform interrupt, if the first attempt did not succeed. Just give
3885 up on the target alltogether. */
3887 async_remote_interrupt_twice (gdb_client_data arg
)
3890 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
3895 /* Reinstall the usual SIGINT handlers, after the target has
3898 cleanup_sigint_signal_handler (void *dummy
)
3900 signal (SIGINT
, handle_sigint
);
3903 /* Send ^C to target to halt it. Target will respond, and send us a
3905 static void (*ofunc
) (int);
3907 /* The command line interface's stop routine. This function is installed
3908 as a signal handler for SIGINT. The first time a user requests a
3909 stop, we call remote_stop to send a break or ^C. If there is no
3910 response from the target (it didn't stop when the user requested it),
3911 we ask the user if he'd like to detach from the target. */
3913 remote_interrupt (int signo
)
3915 /* If this doesn't work, try more severe steps. */
3916 signal (signo
, remote_interrupt_twice
);
3918 gdb_call_async_signal_handler (sigint_remote_token
, 1);
3921 /* The user typed ^C twice. */
3924 remote_interrupt_twice (int signo
)
3926 signal (signo
, ofunc
);
3927 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
3928 signal (signo
, remote_interrupt
);
3931 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
3932 thread, all threads of a remote process, or all threads of all
3936 remote_stop_ns (ptid_t ptid
)
3938 struct remote_state
*rs
= get_remote_state ();
3940 char *endp
= rs
->buf
+ get_remote_packet_size ();
3941 struct stop_reply
*reply
, *next
;
3943 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3944 remote_vcont_probe (rs
);
3946 if (!rs
->support_vCont_t
)
3947 error (_("Remote server does not support stopping threads"));
3949 if (ptid_equal (ptid
, minus_one_ptid
)
3950 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
3951 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
3956 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
3958 if (ptid_is_pid (ptid
))
3959 /* All (-1) threads of process. */
3960 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3963 /* Small optimization: if we already have a stop reply for
3964 this thread, no use in telling the stub we want this
3966 if (peek_stop_reply (ptid
))
3972 p
= write_ptid (p
, endp
, nptid
);
3975 /* In non-stop, we get an immediate OK reply. The stop reply will
3976 come in asynchronously by notification. */
3978 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3979 if (strcmp (rs
->buf
, "OK") != 0)
3980 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
3983 /* All-stop version of target_stop. Sends a break or a ^C to stop the
3984 remote target. It is undefined which thread of which process
3985 reports the stop. */
3988 remote_stop_as (ptid_t ptid
)
3990 struct remote_state
*rs
= get_remote_state ();
3992 /* If the inferior is stopped already, but the core didn't know
3993 about it yet, just ignore the request. The cached wait status
3994 will be collected in remote_wait. */
3995 if (rs
->cached_wait_status
)
3998 /* Send a break or a ^C, depending on user preference. */
4001 serial_send_break (remote_desc
);
4003 serial_write (remote_desc
, "\003", 1);
4006 /* This is the generic stop called via the target vector. When a target
4007 interrupt is requested, either by the command line or the GUI, we
4008 will eventually end up here. */
4011 remote_stop (ptid_t ptid
)
4014 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
4017 remote_stop_ns (ptid
);
4019 remote_stop_as (ptid
);
4022 /* Ask the user what to do when an interrupt is received. */
4025 interrupt_query (void)
4027 target_terminal_ours ();
4029 if (target_can_async_p ())
4031 signal (SIGINT
, handle_sigint
);
4032 deprecated_throw_reason (RETURN_QUIT
);
4036 if (query (_("Interrupted while waiting for the program.\n\
4037 Give up (and stop debugging it)? ")))
4040 deprecated_throw_reason (RETURN_QUIT
);
4044 target_terminal_inferior ();
4047 /* Enable/disable target terminal ownership. Most targets can use
4048 terminal groups to control terminal ownership. Remote targets are
4049 different in that explicit transfer of ownership to/from GDB/target
4053 remote_terminal_inferior (void)
4055 if (!target_async_permitted
)
4056 /* Nothing to do. */
4059 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
4060 idempotent. The event-loop GDB talking to an asynchronous target
4061 with a synchronous command calls this function from both
4062 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
4063 transfer the terminal to the target when it shouldn't this guard
4065 if (!remote_async_terminal_ours_p
)
4067 delete_file_handler (input_fd
);
4068 remote_async_terminal_ours_p
= 0;
4069 initialize_sigint_signal_handler ();
4070 /* NOTE: At this point we could also register our selves as the
4071 recipient of all input. Any characters typed could then be
4072 passed on down to the target. */
4076 remote_terminal_ours (void)
4078 if (!target_async_permitted
)
4079 /* Nothing to do. */
4082 /* See FIXME in remote_terminal_inferior. */
4083 if (remote_async_terminal_ours_p
)
4085 cleanup_sigint_signal_handler (NULL
);
4086 add_file_handler (input_fd
, stdin_event_handler
, 0);
4087 remote_async_terminal_ours_p
= 1;
4091 remote_console_output (char *msg
)
4095 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4098 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4101 fputs_unfiltered (tb
, gdb_stdtarg
);
4103 gdb_flush (gdb_stdtarg
);
4106 typedef struct cached_reg
4109 gdb_byte data
[MAX_REGISTER_SIZE
];
4112 DEF_VEC_O(cached_reg_t
);
4116 struct stop_reply
*next
;
4120 struct target_waitstatus ws
;
4122 VEC(cached_reg_t
) *regcache
;
4124 int stopped_by_watchpoint_p
;
4125 CORE_ADDR watch_data_address
;
4131 /* The list of already fetched and acknowledged stop events. */
4132 static struct stop_reply
*stop_reply_queue
;
4134 static struct stop_reply
*
4135 stop_reply_xmalloc (void)
4137 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4143 stop_reply_xfree (struct stop_reply
*r
)
4147 VEC_free (cached_reg_t
, r
->regcache
);
4152 /* Discard all pending stop replies of inferior PID. If PID is -1,
4153 discard everything. */
4156 discard_pending_stop_replies (int pid
)
4158 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4160 /* Discard the in-flight notification. */
4161 if (pending_stop_reply
!= NULL
4163 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4165 stop_reply_xfree (pending_stop_reply
);
4166 pending_stop_reply
= NULL
;
4169 /* Discard the stop replies we have already pulled with
4171 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4175 || ptid_get_pid (reply
->ptid
) == pid
)
4177 if (reply
== stop_reply_queue
)
4178 stop_reply_queue
= reply
->next
;
4180 prev
->next
= reply
->next
;
4182 stop_reply_xfree (reply
);
4189 /* Cleanup wrapper. */
4192 do_stop_reply_xfree (void *arg
)
4194 struct stop_reply
*r
= arg
;
4195 stop_reply_xfree (r
);
4198 /* Look for a queued stop reply belonging to PTID. If one is found,
4199 remove it from the queue, and return it. Returns NULL if none is
4200 found. If there are still queued events left to process, tell the
4201 event loop to get back to target_wait soon. */
4203 static struct stop_reply
*
4204 queued_stop_reply (ptid_t ptid
)
4206 struct stop_reply
*it
, *prev
;
4207 struct stop_reply head
;
4209 head
.next
= stop_reply_queue
;
4214 if (!ptid_equal (ptid
, minus_one_ptid
))
4215 for (; it
; prev
= it
, it
= it
->next
)
4216 if (ptid_equal (ptid
, it
->ptid
))
4221 prev
->next
= it
->next
;
4225 stop_reply_queue
= head
.next
;
4227 if (stop_reply_queue
)
4228 /* There's still at least an event left. */
4229 mark_async_event_handler (remote_async_inferior_event_token
);
4234 /* Push a fully parsed stop reply in the stop reply queue. Since we
4235 know that we now have at least one queued event left to pass to the
4236 core side, tell the event loop to get back to target_wait soon. */
4239 push_stop_reply (struct stop_reply
*new_event
)
4241 struct stop_reply
*event
;
4243 if (stop_reply_queue
)
4245 for (event
= stop_reply_queue
;
4246 event
&& event
->next
;
4247 event
= event
->next
)
4250 event
->next
= new_event
;
4253 stop_reply_queue
= new_event
;
4255 mark_async_event_handler (remote_async_inferior_event_token
);
4258 /* Returns true if we have a stop reply for PTID. */
4261 peek_stop_reply (ptid_t ptid
)
4263 struct stop_reply
*it
;
4265 for (it
= stop_reply_queue
; it
; it
= it
->next
)
4266 if (ptid_equal (ptid
, it
->ptid
))
4268 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
4275 /* Parse the stop reply in BUF. Either the function succeeds, and the
4276 result is stored in EVENT, or throws an error. */
4279 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
4281 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4285 event
->ptid
= null_ptid
;
4286 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
4287 event
->ws
.value
.integer
= 0;
4288 event
->solibs_changed
= 0;
4289 event
->replay_event
= 0;
4290 event
->stopped_by_watchpoint_p
= 0;
4291 event
->regcache
= NULL
;
4295 case 'T': /* Status with PC, SP, FP, ... */
4297 gdb_byte regs
[MAX_REGISTER_SIZE
];
4299 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4300 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4302 n... = register number
4303 r... = register contents
4306 p
= &buf
[3]; /* after Txx */
4314 /* If the packet contains a register number, save it in
4315 pnum and set p1 to point to the character following it.
4316 Otherwise p1 points to p. */
4318 /* If this packet is an awatch packet, don't parse the 'a'
4319 as a register number. */
4321 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
4323 /* Read the ``P'' register number. */
4324 pnum
= strtol (p
, &p_temp
, 16);
4330 if (p1
== p
) /* No register number present here. */
4332 p1
= strchr (p
, ':');
4334 error (_("Malformed packet(a) (missing colon): %s\n\
4337 if (strncmp (p
, "thread", p1
- p
) == 0)
4338 event
->ptid
= read_ptid (++p1
, &p
);
4339 else if ((strncmp (p
, "watch", p1
- p
) == 0)
4340 || (strncmp (p
, "rwatch", p1
- p
) == 0)
4341 || (strncmp (p
, "awatch", p1
- p
) == 0))
4343 event
->stopped_by_watchpoint_p
= 1;
4344 p
= unpack_varlen_hex (++p1
, &addr
);
4345 event
->watch_data_address
= (CORE_ADDR
) addr
;
4347 else if (strncmp (p
, "library", p1
- p
) == 0)
4351 while (*p_temp
&& *p_temp
!= ';')
4354 event
->solibs_changed
= 1;
4357 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
4359 /* NO_HISTORY event.
4360 p1 will indicate "begin" or "end", but
4361 it makes no difference for now, so ignore it. */
4362 event
->replay_event
= 1;
4363 p_temp
= strchr (p1
+ 1, ';');
4369 /* Silently skip unknown optional info. */
4370 p_temp
= strchr (p1
+ 1, ';');
4377 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
4378 cached_reg_t cached_reg
;
4383 error (_("Malformed packet(b) (missing colon): %s\n\
4389 error (_("Remote sent bad register number %s: %s\n\
4391 phex_nz (pnum
, 0), p
, buf
);
4393 cached_reg
.num
= reg
->regnum
;
4395 fieldsize
= hex2bin (p
, cached_reg
.data
,
4396 register_size (target_gdbarch
,
4399 if (fieldsize
< register_size (target_gdbarch
,
4401 warning (_("Remote reply is too short: %s"), buf
);
4403 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
4407 error (_("Remote register badly formatted: %s\nhere: %s"),
4413 case 'S': /* Old style status, just signal only. */
4414 if (event
->solibs_changed
)
4415 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
4416 else if (event
->replay_event
)
4417 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
4420 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
4421 event
->ws
.value
.sig
= (enum target_signal
)
4422 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
4425 case 'W': /* Target exited. */
4432 /* GDB used to accept only 2 hex chars here. Stubs should
4433 only send more if they detect GDB supports multi-process
4435 p
= unpack_varlen_hex (&buf
[1], &value
);
4439 /* The remote process exited. */
4440 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
4441 event
->ws
.value
.integer
= value
;
4445 /* The remote process exited with a signal. */
4446 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
4447 event
->ws
.value
.sig
= (enum target_signal
) value
;
4450 /* If no process is specified, assume inferior_ptid. */
4451 pid
= ptid_get_pid (inferior_ptid
);
4460 else if (strncmp (p
,
4461 "process:", sizeof ("process:") - 1) == 0)
4464 p
+= sizeof ("process:") - 1;
4465 unpack_varlen_hex (p
, &upid
);
4469 error (_("unknown stop reply packet: %s"), buf
);
4472 error (_("unknown stop reply packet: %s"), buf
);
4473 event
->ptid
= pid_to_ptid (pid
);
4478 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
4479 error (_("No process or thread specified in stop reply: %s"), buf
);
4482 /* When the stub wants to tell GDB about a new stop reply, it sends a
4483 stop notification (%Stop). Those can come it at any time, hence,
4484 we have to make sure that any pending putpkt/getpkt sequence we're
4485 making is finished, before querying the stub for more events with
4486 vStopped. E.g., if we started a vStopped sequence immediatelly
4487 upon receiving the %Stop notification, something like this could
4495 1.6) <-- (registers reply to step #1.3)
4497 Obviously, the reply in step #1.6 would be unexpected to a vStopped
4500 To solve this, whenever we parse a %Stop notification sucessfully,
4501 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
4502 doing whatever we were doing:
4508 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
4509 2.5) <-- (registers reply to step #2.3)
4511 Eventualy after step #2.5, we return to the event loop, which
4512 notices there's an event on the
4513 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
4514 associated callback --- the function below. At this point, we're
4515 always safe to start a vStopped sequence. :
4518 2.7) <-- T05 thread:2
4524 remote_get_pending_stop_replies (void)
4526 struct remote_state
*rs
= get_remote_state ();
4529 if (pending_stop_reply
)
4532 putpkt ("vStopped");
4534 /* Now we can rely on it. */
4535 push_stop_reply (pending_stop_reply
);
4536 pending_stop_reply
= NULL
;
4540 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4541 if (strcmp (rs
->buf
, "OK") == 0)
4545 struct cleanup
*old_chain
;
4546 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
4548 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4549 remote_parse_stop_reply (rs
->buf
, stop_reply
);
4552 putpkt ("vStopped");
4554 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
4556 /* Now we can rely on it. */
4557 discard_cleanups (old_chain
);
4558 push_stop_reply (stop_reply
);
4561 /* We got an unknown stop reply. */
4562 do_cleanups (old_chain
);
4569 /* Called when it is decided that STOP_REPLY holds the info of the
4570 event that is to be returned to the core. This function always
4571 destroys STOP_REPLY. */
4574 process_stop_reply (struct stop_reply
*stop_reply
,
4575 struct target_waitstatus
*status
)
4579 *status
= stop_reply
->ws
;
4580 ptid
= stop_reply
->ptid
;
4582 /* If no thread/process was reported by the stub, assume the current
4584 if (ptid_equal (ptid
, null_ptid
))
4585 ptid
= inferior_ptid
;
4587 if (status
->kind
!= TARGET_WAITKIND_EXITED
4588 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4590 /* Expedited registers. */
4591 if (stop_reply
->regcache
)
4597 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
4599 regcache_raw_supply (get_thread_regcache (ptid
),
4600 reg
->num
, reg
->data
);
4601 VEC_free (cached_reg_t
, stop_reply
->regcache
);
4604 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
4605 remote_watch_data_address
= stop_reply
->watch_data_address
;
4607 remote_notice_new_inferior (ptid
, 0);
4610 stop_reply_xfree (stop_reply
);
4614 /* The non-stop mode version of target_wait. */
4617 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4619 struct remote_state
*rs
= get_remote_state ();
4620 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4621 ptid_t event_ptid
= null_ptid
;
4622 struct stop_reply
*stop_reply
;
4625 /* If in non-stop mode, get out of getpkt even if a
4626 notification is received. */
4628 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4635 case 'E': /* Error of some sort. */
4636 /* We're out of sync with the target now. Did it continue
4637 or not? We can't tell which thread it was in non-stop,
4638 so just ignore this. */
4639 warning (_("Remote failure reply: %s"), rs
->buf
);
4641 case 'O': /* Console output. */
4642 remote_console_output (rs
->buf
+ 1);
4645 warning (_("Invalid remote reply: %s"), rs
->buf
);
4649 /* Acknowledge a pending stop reply that may have arrived in the
4651 if (pending_stop_reply
!= NULL
)
4652 remote_get_pending_stop_replies ();
4654 /* If indeed we noticed a stop reply, we're done. */
4655 stop_reply
= queued_stop_reply (ptid
);
4656 if (stop_reply
!= NULL
)
4657 return process_stop_reply (stop_reply
, status
);
4659 /* Still no event. If we're just polling for an event, then
4660 return to the event loop. */
4661 if (options
& TARGET_WNOHANG
)
4663 status
->kind
= TARGET_WAITKIND_IGNORE
;
4664 return minus_one_ptid
;
4667 /* Otherwise do a blocking wait. */
4668 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4673 /* Wait until the remote machine stops, then return, storing status in
4674 STATUS just as `wait' would. */
4677 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4679 struct remote_state
*rs
= get_remote_state ();
4680 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4681 ptid_t event_ptid
= null_ptid
;
4683 int solibs_changed
= 0;
4685 struct stop_reply
*stop_reply
;
4689 status
->kind
= TARGET_WAITKIND_IGNORE
;
4690 status
->value
.integer
= 0;
4692 stop_reply
= queued_stop_reply (ptid
);
4693 if (stop_reply
!= NULL
)
4694 return process_stop_reply (stop_reply
, status
);
4696 if (rs
->cached_wait_status
)
4697 /* Use the cached wait status, but only once. */
4698 rs
->cached_wait_status
= 0;
4703 if (!target_is_async_p ())
4705 ofunc
= signal (SIGINT
, remote_interrupt
);
4706 /* If the user hit C-c before this packet, or between packets,
4707 pretend that it was hit right here. */
4711 remote_interrupt (SIGINT
);
4715 /* FIXME: cagney/1999-09-27: If we're in async mode we should
4716 _never_ wait for ever -> test on target_is_async_p().
4717 However, before we do that we need to ensure that the caller
4718 knows how to take the target into/out of async mode. */
4719 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
4720 if (!target_is_async_p ())
4721 signal (SIGINT
, ofunc
);
4726 remote_stopped_by_watchpoint_p
= 0;
4728 /* We got something. */
4729 rs
->waiting_for_stop_reply
= 0;
4733 case 'E': /* Error of some sort. */
4734 /* We're out of sync with the target now. Did it continue or
4735 not? Not is more likely, so report a stop. */
4736 warning (_("Remote failure reply: %s"), buf
);
4737 status
->kind
= TARGET_WAITKIND_STOPPED
;
4738 status
->value
.sig
= TARGET_SIGNAL_0
;
4740 case 'F': /* File-I/O request. */
4741 remote_fileio_request (buf
);
4743 case 'T': case 'S': case 'X': case 'W':
4745 struct stop_reply
*stop_reply
;
4746 struct cleanup
*old_chain
;
4748 stop_reply
= stop_reply_xmalloc ();
4749 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4750 remote_parse_stop_reply (buf
, stop_reply
);
4751 discard_cleanups (old_chain
);
4752 event_ptid
= process_stop_reply (stop_reply
, status
);
4755 case 'O': /* Console output. */
4756 remote_console_output (buf
+ 1);
4758 /* The target didn't really stop; keep waiting. */
4759 rs
->waiting_for_stop_reply
= 1;
4763 if (last_sent_signal
!= TARGET_SIGNAL_0
)
4765 /* Zero length reply means that we tried 'S' or 'C' and the
4766 remote system doesn't support it. */
4767 target_terminal_ours_for_output ();
4769 ("Can't send signals to this remote system. %s not sent.\n",
4770 target_signal_to_name (last_sent_signal
));
4771 last_sent_signal
= TARGET_SIGNAL_0
;
4772 target_terminal_inferior ();
4774 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
4775 putpkt ((char *) buf
);
4777 /* We just told the target to resume, so a stop reply is in
4779 rs
->waiting_for_stop_reply
= 1;
4782 /* else fallthrough */
4784 warning (_("Invalid remote reply: %s"), buf
);
4786 rs
->waiting_for_stop_reply
= 1;
4790 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
4792 /* Nothing interesting happened. If we're doing a non-blocking
4793 poll, we're done. Otherwise, go back to waiting. */
4794 if (options
& TARGET_WNOHANG
)
4795 return minus_one_ptid
;
4799 else if (status
->kind
!= TARGET_WAITKIND_EXITED
4800 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4802 if (!ptid_equal (event_ptid
, null_ptid
))
4803 record_currthread (event_ptid
);
4805 event_ptid
= inferior_ptid
;
4808 /* A process exit. Invalidate our notion of current thread. */
4809 record_currthread (minus_one_ptid
);
4814 /* Wait until the remote machine stops, then return, storing status in
4815 STATUS just as `wait' would. */
4818 remote_wait (struct target_ops
*ops
,
4819 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
4824 event_ptid
= remote_wait_ns (ptid
, status
, options
);
4826 event_ptid
= remote_wait_as (ptid
, status
, options
);
4828 if (target_can_async_p ())
4830 /* If there are are events left in the queue tell the event loop
4832 if (stop_reply_queue
)
4833 mark_async_event_handler (remote_async_inferior_event_token
);
4839 /* Fetch a single register using a 'p' packet. */
4842 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
4844 struct remote_state
*rs
= get_remote_state ();
4846 char regp
[MAX_REGISTER_SIZE
];
4849 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
4852 if (reg
->pnum
== -1)
4857 p
+= hexnumstr (p
, reg
->pnum
);
4859 remote_send (&rs
->buf
, &rs
->buf_size
);
4863 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
4867 case PACKET_UNKNOWN
:
4870 error (_("Could not fetch register \"%s\""),
4871 gdbarch_register_name (get_regcache_arch (regcache
), reg
->regnum
));
4874 /* If this register is unfetchable, tell the regcache. */
4877 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
4881 /* Otherwise, parse and supply the value. */
4887 error (_("fetch_register_using_p: early buf termination"));
4889 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4892 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
4896 /* Fetch the registers included in the target's 'g' packet. */
4899 send_g_packet (void)
4901 struct remote_state
*rs
= get_remote_state ();
4906 sprintf (rs
->buf
, "g");
4907 remote_send (&rs
->buf
, &rs
->buf_size
);
4909 /* We can get out of synch in various cases. If the first character
4910 in the buffer is not a hex character, assume that has happened
4911 and try to fetch another packet to read. */
4912 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
4913 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
4914 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
4915 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
4918 fprintf_unfiltered (gdb_stdlog
,
4919 "Bad register packet; fetching a new packet\n");
4920 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4923 buf_len
= strlen (rs
->buf
);
4925 /* Sanity check the received packet. */
4926 if (buf_len
% 2 != 0)
4927 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
4933 process_g_packet (struct regcache
*regcache
)
4935 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
4936 struct remote_state
*rs
= get_remote_state ();
4937 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4942 buf_len
= strlen (rs
->buf
);
4944 /* Further sanity checks, with knowledge of the architecture. */
4945 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
4946 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
4948 /* Save the size of the packet sent to us by the target. It is used
4949 as a heuristic when determining the max size of packets that the
4950 target can safely receive. */
4951 if (rsa
->actual_register_packet_size
== 0)
4952 rsa
->actual_register_packet_size
= buf_len
;
4954 /* If this is smaller than we guessed the 'g' packet would be,
4955 update our records. A 'g' reply that doesn't include a register's
4956 value implies either that the register is not available, or that
4957 the 'p' packet must be used. */
4958 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
4960 rsa
->sizeof_g_packet
= buf_len
/ 2;
4962 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4964 if (rsa
->regs
[i
].pnum
== -1)
4967 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
4968 rsa
->regs
[i
].in_g_packet
= 0;
4970 rsa
->regs
[i
].in_g_packet
= 1;
4974 regs
= alloca (rsa
->sizeof_g_packet
);
4976 /* Unimplemented registers read as all bits zero. */
4977 memset (regs
, 0, rsa
->sizeof_g_packet
);
4979 /* Reply describes registers byte by byte, each byte encoded as two
4980 hex characters. Suck them all up, then supply them to the
4981 register cacheing/storage mechanism. */
4984 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
4986 if (p
[0] == 0 || p
[1] == 0)
4987 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4988 internal_error (__FILE__
, __LINE__
,
4989 "unexpected end of 'g' packet reply");
4991 if (p
[0] == 'x' && p
[1] == 'x')
4992 regs
[i
] = 0; /* 'x' */
4994 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
5000 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
5002 struct packet_reg
*r
= &rsa
->regs
[i
];
5005 if (r
->offset
* 2 >= strlen (rs
->buf
))
5006 /* This shouldn't happen - we adjusted in_g_packet above. */
5007 internal_error (__FILE__
, __LINE__
,
5008 "unexpected end of 'g' packet reply");
5009 else if (rs
->buf
[r
->offset
* 2] == 'x')
5011 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
5012 /* The register isn't available, mark it as such (at
5013 the same time setting the value to zero). */
5014 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
5017 regcache_raw_supply (regcache
, r
->regnum
,
5025 fetch_registers_using_g (struct regcache
*regcache
)
5028 process_g_packet (regcache
);
5032 remote_fetch_registers (struct target_ops
*ops
,
5033 struct regcache
*regcache
, int regnum
)
5035 struct remote_state
*rs
= get_remote_state ();
5036 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5039 set_general_thread (inferior_ptid
);
5043 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5044 gdb_assert (reg
!= NULL
);
5046 /* If this register might be in the 'g' packet, try that first -
5047 we are likely to read more than one register. If this is the
5048 first 'g' packet, we might be overly optimistic about its
5049 contents, so fall back to 'p'. */
5050 if (reg
->in_g_packet
)
5052 fetch_registers_using_g (regcache
);
5053 if (reg
->in_g_packet
)
5057 if (fetch_register_using_p (regcache
, reg
))
5060 /* This register is not available. */
5061 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5066 fetch_registers_using_g (regcache
);
5068 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5069 if (!rsa
->regs
[i
].in_g_packet
)
5070 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5072 /* This register is not available. */
5073 regcache_raw_supply (regcache
, i
, NULL
);
5077 /* Prepare to store registers. Since we may send them all (using a
5078 'G' request), we have to read out the ones we don't want to change
5082 remote_prepare_to_store (struct regcache
*regcache
)
5084 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5086 gdb_byte buf
[MAX_REGISTER_SIZE
];
5088 /* Make sure the entire registers array is valid. */
5089 switch (remote_protocol_packets
[PACKET_P
].support
)
5091 case PACKET_DISABLE
:
5092 case PACKET_SUPPORT_UNKNOWN
:
5093 /* Make sure all the necessary registers are cached. */
5094 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5095 if (rsa
->regs
[i
].in_g_packet
)
5096 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5103 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5104 packet was not recognized. */
5107 store_register_using_P (const struct regcache
*regcache
, struct packet_reg
*reg
)
5109 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5110 struct remote_state
*rs
= get_remote_state ();
5111 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5112 /* Try storing a single register. */
5113 char *buf
= rs
->buf
;
5114 gdb_byte regp
[MAX_REGISTER_SIZE
];
5117 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5120 if (reg
->pnum
== -1)
5123 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5124 p
= buf
+ strlen (buf
);
5125 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5126 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5127 remote_send (&rs
->buf
, &rs
->buf_size
);
5129 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5134 error (_("Could not write register \"%s\""),
5135 gdbarch_register_name (gdbarch
, reg
->regnum
));
5136 case PACKET_UNKNOWN
:
5139 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5143 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5144 contents of the register cache buffer. FIXME: ignores errors. */
5147 store_registers_using_G (const struct regcache
*regcache
)
5149 struct remote_state
*rs
= get_remote_state ();
5150 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5154 /* Extract all the registers in the regcache copying them into a
5158 regs
= alloca (rsa
->sizeof_g_packet
);
5159 memset (regs
, 0, rsa
->sizeof_g_packet
);
5160 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5162 struct packet_reg
*r
= &rsa
->regs
[i
];
5164 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5168 /* Command describes registers byte by byte,
5169 each byte encoded as two hex characters. */
5172 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5174 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5175 remote_send (&rs
->buf
, &rs
->buf_size
);
5178 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5179 of the register cache buffer. FIXME: ignores errors. */
5182 remote_store_registers (struct target_ops
*ops
,
5183 struct regcache
*regcache
, int regnum
)
5185 struct remote_state
*rs
= get_remote_state ();
5186 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5189 set_general_thread (inferior_ptid
);
5193 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5194 gdb_assert (reg
!= NULL
);
5196 /* Always prefer to store registers using the 'P' packet if
5197 possible; we often change only a small number of registers.
5198 Sometimes we change a larger number; we'd need help from a
5199 higher layer to know to use 'G'. */
5200 if (store_register_using_P (regcache
, reg
))
5203 /* For now, don't complain if we have no way to write the
5204 register. GDB loses track of unavailable registers too
5205 easily. Some day, this may be an error. We don't have
5206 any way to read the register, either... */
5207 if (!reg
->in_g_packet
)
5210 store_registers_using_G (regcache
);
5214 store_registers_using_G (regcache
);
5216 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5217 if (!rsa
->regs
[i
].in_g_packet
)
5218 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
5219 /* See above for why we do not issue an error here. */
5224 /* Return the number of hex digits in num. */
5227 hexnumlen (ULONGEST num
)
5231 for (i
= 0; num
!= 0; i
++)
5237 /* Set BUF to the minimum number of hex digits representing NUM. */
5240 hexnumstr (char *buf
, ULONGEST num
)
5242 int len
= hexnumlen (num
);
5243 return hexnumnstr (buf
, num
, len
);
5247 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5250 hexnumnstr (char *buf
, ULONGEST num
, int width
)
5256 for (i
= width
- 1; i
>= 0; i
--)
5258 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
5265 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5268 remote_address_masked (CORE_ADDR addr
)
5270 int address_size
= remote_address_size
;
5271 /* If "remoteaddresssize" was not set, default to target address size. */
5273 address_size
= gdbarch_addr_bit (target_gdbarch
);
5275 if (address_size
> 0
5276 && address_size
< (sizeof (ULONGEST
) * 8))
5278 /* Only create a mask when that mask can safely be constructed
5279 in a ULONGEST variable. */
5281 mask
= (mask
<< address_size
) - 1;
5287 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5288 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5289 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5290 (which may be more than *OUT_LEN due to escape characters). The
5291 total number of bytes in the output buffer will be at most
5295 remote_escape_output (const gdb_byte
*buffer
, int len
,
5296 gdb_byte
*out_buf
, int *out_len
,
5299 int input_index
, output_index
;
5302 for (input_index
= 0; input_index
< len
; input_index
++)
5304 gdb_byte b
= buffer
[input_index
];
5306 if (b
== '$' || b
== '#' || b
== '}')
5308 /* These must be escaped. */
5309 if (output_index
+ 2 > out_maxlen
)
5311 out_buf
[output_index
++] = '}';
5312 out_buf
[output_index
++] = b
^ 0x20;
5316 if (output_index
+ 1 > out_maxlen
)
5318 out_buf
[output_index
++] = b
;
5322 *out_len
= input_index
;
5323 return output_index
;
5326 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5327 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5328 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5330 This function reverses remote_escape_output. It allows more
5331 escaped characters than that function does, in particular because
5332 '*' must be escaped to avoid the run-length encoding processing
5333 in reading packets. */
5336 remote_unescape_input (const gdb_byte
*buffer
, int len
,
5337 gdb_byte
*out_buf
, int out_maxlen
)
5339 int input_index
, output_index
;
5344 for (input_index
= 0; input_index
< len
; input_index
++)
5346 gdb_byte b
= buffer
[input_index
];
5348 if (output_index
+ 1 > out_maxlen
)
5350 warning (_("Received too much data from remote target;"
5351 " ignoring overflow."));
5352 return output_index
;
5357 out_buf
[output_index
++] = b
^ 0x20;
5363 out_buf
[output_index
++] = b
;
5367 error (_("Unmatched escape character in target response."));
5369 return output_index
;
5372 /* Determine whether the remote target supports binary downloading.
5373 This is accomplished by sending a no-op memory write of zero length
5374 to the target at the specified address. It does not suffice to send
5375 the whole packet, since many stubs strip the eighth bit and
5376 subsequently compute a wrong checksum, which causes real havoc with
5379 NOTE: This can still lose if the serial line is not eight-bit
5380 clean. In cases like this, the user should clear "remote
5384 check_binary_download (CORE_ADDR addr
)
5386 struct remote_state
*rs
= get_remote_state ();
5388 switch (remote_protocol_packets
[PACKET_X
].support
)
5390 case PACKET_DISABLE
:
5394 case PACKET_SUPPORT_UNKNOWN
:
5400 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5402 p
+= hexnumstr (p
, (ULONGEST
) 0);
5406 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5407 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5409 if (rs
->buf
[0] == '\0')
5412 fprintf_unfiltered (gdb_stdlog
,
5413 "binary downloading NOT suppported by target\n");
5414 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
5419 fprintf_unfiltered (gdb_stdlog
,
5420 "binary downloading suppported by target\n");
5421 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
5428 /* Write memory data directly to the remote machine.
5429 This does not inform the data cache; the data cache uses this.
5430 HEADER is the starting part of the packet.
5431 MEMADDR is the address in the remote memory space.
5432 MYADDR is the address of the buffer in our space.
5433 LEN is the number of bytes.
5434 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
5435 should send data as binary ('X'), or hex-encoded ('M').
5437 The function creates packet of the form
5438 <HEADER><ADDRESS>,<LENGTH>:<DATA>
5440 where encoding of <DATA> is termined by PACKET_FORMAT.
5442 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
5445 Returns the number of bytes transferred, or 0 (setting errno) for
5446 error. Only transfer a single packet. */
5449 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
5450 const gdb_byte
*myaddr
, int len
,
5451 char packet_format
, int use_length
)
5453 struct remote_state
*rs
= get_remote_state ();
5463 if (packet_format
!= 'X' && packet_format
!= 'M')
5464 internal_error (__FILE__
, __LINE__
,
5465 "remote_write_bytes_aux: bad packet format");
5470 payload_size
= get_memory_write_packet_size ();
5472 /* The packet buffer will be large enough for the payload;
5473 get_memory_packet_size ensures this. */
5476 /* Compute the size of the actual payload by subtracting out the
5477 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
5479 payload_size
-= strlen ("$,:#NN");
5481 /* The comma won't be used. */
5483 header_length
= strlen (header
);
5484 payload_size
-= header_length
;
5485 payload_size
-= hexnumlen (memaddr
);
5487 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
5489 strcat (rs
->buf
, header
);
5490 p
= rs
->buf
+ strlen (header
);
5492 /* Compute a best guess of the number of bytes actually transfered. */
5493 if (packet_format
== 'X')
5495 /* Best guess at number of bytes that will fit. */
5496 todo
= min (len
, payload_size
);
5498 payload_size
-= hexnumlen (todo
);
5499 todo
= min (todo
, payload_size
);
5503 /* Num bytes that will fit. */
5504 todo
= min (len
, payload_size
/ 2);
5506 payload_size
-= hexnumlen (todo
);
5507 todo
= min (todo
, payload_size
/ 2);
5511 internal_error (__FILE__
, __LINE__
,
5512 _("minumum packet size too small to write data"));
5514 /* If we already need another packet, then try to align the end
5515 of this packet to a useful boundary. */
5516 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
5517 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
5519 /* Append "<memaddr>". */
5520 memaddr
= remote_address_masked (memaddr
);
5521 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5528 /* Append <len>. Retain the location/size of <len>. It may need to
5529 be adjusted once the packet body has been created. */
5531 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
5539 /* Append the packet body. */
5540 if (packet_format
== 'X')
5542 /* Binary mode. Send target system values byte by byte, in
5543 increasing byte addresses. Only escape certain critical
5545 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
5548 /* If not all TODO bytes fit, then we'll need another packet. Make
5549 a second try to keep the end of the packet aligned. Don't do
5550 this if the packet is tiny. */
5551 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
5555 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
5557 if (new_nr_bytes
!= nr_bytes
)
5558 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
5563 p
+= payload_length
;
5564 if (use_length
&& nr_bytes
< todo
)
5566 /* Escape chars have filled up the buffer prematurely,
5567 and we have actually sent fewer bytes than planned.
5568 Fix-up the length field of the packet. Use the same
5569 number of characters as before. */
5570 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
5571 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
5576 /* Normal mode: Send target system values byte by byte, in
5577 increasing byte addresses. Each byte is encoded as a two hex
5579 nr_bytes
= bin2hex (myaddr
, p
, todo
);
5583 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5584 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5586 if (rs
->buf
[0] == 'E')
5588 /* There is no correspondance between what the remote protocol
5589 uses for errors and errno codes. We would like a cleaner way
5590 of representing errors (big enough to include errno codes,
5591 bfd_error codes, and others). But for now just return EIO. */
5596 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
5597 fewer bytes than we'd planned. */
5601 /* Write memory data directly to the remote machine.
5602 This does not inform the data cache; the data cache uses this.
5603 MEMADDR is the address in the remote memory space.
5604 MYADDR is the address of the buffer in our space.
5605 LEN is the number of bytes.
5607 Returns number of bytes transferred, or 0 (setting errno) for
5608 error. Only transfer a single packet. */
5611 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
5613 char *packet_format
= 0;
5615 /* Check whether the target supports binary download. */
5616 check_binary_download (memaddr
);
5618 switch (remote_protocol_packets
[PACKET_X
].support
)
5621 packet_format
= "X";
5623 case PACKET_DISABLE
:
5624 packet_format
= "M";
5626 case PACKET_SUPPORT_UNKNOWN
:
5627 internal_error (__FILE__
, __LINE__
,
5628 _("remote_write_bytes: bad internal state"));
5630 internal_error (__FILE__
, __LINE__
, _("bad switch"));
5633 return remote_write_bytes_aux (packet_format
,
5634 memaddr
, myaddr
, len
, packet_format
[0], 1);
5637 /* Read memory data directly from the remote machine.
5638 This does not use the data cache; the data cache uses this.
5639 MEMADDR is the address in the remote memory space.
5640 MYADDR is the address of the buffer in our space.
5641 LEN is the number of bytes.
5643 Returns number of bytes transferred, or 0 for error. */
5645 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
5646 remote targets) shouldn't attempt to read the entire buffer.
5647 Instead it should read a single packet worth of data and then
5648 return the byte size of that packet to the caller. The caller (its
5649 caller and its callers caller ;-) already contains code for
5650 handling partial reads. */
5653 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
5655 struct remote_state
*rs
= get_remote_state ();
5656 int max_buf_size
; /* Max size of packet output buffer. */
5662 max_buf_size
= get_memory_read_packet_size ();
5663 /* The packet buffer will be large enough for the payload;
5664 get_memory_packet_size ensures this. */
5673 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
5675 /* construct "m"<memaddr>","<len>" */
5676 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
5677 memaddr
= remote_address_masked (memaddr
);
5680 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5682 p
+= hexnumstr (p
, (ULONGEST
) todo
);
5686 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5688 if (rs
->buf
[0] == 'E'
5689 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
5690 && rs
->buf
[3] == '\0')
5692 /* There is no correspondance between what the remote
5693 protocol uses for errors and errno codes. We would like
5694 a cleaner way of representing errors (big enough to
5695 include errno codes, bfd_error codes, and others). But
5696 for now just return EIO. */
5701 /* Reply describes memory byte by byte,
5702 each byte encoded as two hex characters. */
5705 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
5707 /* Reply is short. This means that we were able to read
5708 only part of what we wanted to. */
5709 return i
+ (origlen
- len
);
5719 /* Remote notification handler. */
5722 handle_notification (char *buf
, size_t length
)
5724 if (strncmp (buf
, "Stop:", 5) == 0)
5726 if (pending_stop_reply
)
5727 /* We've already parsed the in-flight stop-reply, but the stub
5728 for some reason thought we didn't, possibly due to timeout
5729 on its side. Just ignore it. */
5733 struct cleanup
*old_chain
;
5734 struct stop_reply
*reply
= stop_reply_xmalloc ();
5735 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
5737 remote_parse_stop_reply (buf
+ 5, reply
);
5739 discard_cleanups (old_chain
);
5741 /* Be careful to only set it after parsing, since an error
5742 may be thrown then. */
5743 pending_stop_reply
= reply
;
5745 /* Notify the event loop there's a stop reply to acknowledge
5746 and that there may be more events to fetch. */
5747 mark_async_event_handler (remote_async_get_pending_events_token
);
5751 /* We ignore notifications we don't recognize, for compatibility
5752 with newer stubs. */
5757 /* Read or write LEN bytes from inferior memory at MEMADDR,
5758 transferring to or from debugger address BUFFER. Write to inferior
5759 if SHOULD_WRITE is nonzero. Returns length of data written or
5760 read; 0 for error. TARGET is unused. */
5763 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
5764 int should_write
, struct mem_attrib
*attrib
,
5765 struct target_ops
*target
)
5769 set_general_thread (inferior_ptid
);
5772 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
5774 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
5779 /* Sends a packet with content determined by the printf format string
5780 FORMAT and the remaining arguments, then gets the reply. Returns
5781 whether the packet was a success, a failure, or unknown. */
5783 static enum packet_result
5784 remote_send_printf (const char *format
, ...)
5786 struct remote_state
*rs
= get_remote_state ();
5787 int max_size
= get_remote_packet_size ();
5790 va_start (ap
, format
);
5793 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
5794 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
5796 if (putpkt (rs
->buf
) < 0)
5797 error (_("Communication problem with target."));
5800 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5802 return packet_check_result (rs
->buf
);
5806 restore_remote_timeout (void *p
)
5808 int value
= *(int *)p
;
5809 remote_timeout
= value
;
5812 /* Flash writing can take quite some time. We'll set
5813 effectively infinite timeout for flash operations.
5814 In future, we'll need to decide on a better approach. */
5815 static const int remote_flash_timeout
= 1000;
5818 remote_flash_erase (struct target_ops
*ops
,
5819 ULONGEST address
, LONGEST length
)
5821 int saved_remote_timeout
= remote_timeout
;
5822 enum packet_result ret
;
5824 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5825 &saved_remote_timeout
);
5826 remote_timeout
= remote_flash_timeout
;
5828 ret
= remote_send_printf ("vFlashErase:%s,%s",
5833 case PACKET_UNKNOWN
:
5834 error (_("Remote target does not support flash erase"));
5836 error (_("Error erasing flash with vFlashErase packet"));
5841 do_cleanups (back_to
);
5845 remote_flash_write (struct target_ops
*ops
,
5846 ULONGEST address
, LONGEST length
,
5847 const gdb_byte
*data
)
5849 int saved_remote_timeout
= remote_timeout
;
5851 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5852 &saved_remote_timeout
);
5854 remote_timeout
= remote_flash_timeout
;
5855 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
5856 do_cleanups (back_to
);
5862 remote_flash_done (struct target_ops
*ops
)
5864 int saved_remote_timeout
= remote_timeout
;
5866 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5867 &saved_remote_timeout
);
5869 remote_timeout
= remote_flash_timeout
;
5870 ret
= remote_send_printf ("vFlashDone");
5871 do_cleanups (back_to
);
5875 case PACKET_UNKNOWN
:
5876 error (_("Remote target does not support vFlashDone"));
5878 error (_("Error finishing flash operation"));
5885 remote_files_info (struct target_ops
*ignore
)
5887 puts_filtered ("Debugging a target over a serial line.\n");
5890 /* Stuff for dealing with the packets which are part of this protocol.
5891 See comment at top of file for details. */
5893 /* Read a single character from the remote end. */
5896 readchar (int timeout
)
5900 ch
= serial_readchar (remote_desc
, timeout
);
5905 switch ((enum serial_rc
) ch
)
5909 error (_("Remote connection closed"));
5912 perror_with_name (_("Remote communication error"));
5914 case SERIAL_TIMEOUT
:
5920 /* Send the command in *BUF to the remote machine, and read the reply
5921 into *BUF. Report an error if we get an error reply. Resize
5922 *BUF using xrealloc if necessary to hold the result, and update
5926 remote_send (char **buf
,
5930 getpkt (buf
, sizeof_buf
, 0);
5932 if ((*buf
)[0] == 'E')
5933 error (_("Remote failure reply: %s"), *buf
);
5936 /* Return a pointer to an xmalloc'ed string representing an escaped
5937 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
5938 etc. The caller is responsible for releasing the returned
5942 escape_buffer (const char *buf
, int n
)
5944 struct cleanup
*old_chain
;
5945 struct ui_file
*stb
;
5949 stb
= mem_fileopen ();
5950 old_chain
= make_cleanup_ui_file_delete (stb
);
5952 fputstrn_unfiltered (buf
, n
, 0, stb
);
5953 str
= ui_file_xstrdup (stb
, &length
);
5954 do_cleanups (old_chain
);
5958 /* Display a null-terminated packet on stdout, for debugging, using C
5962 print_packet (char *buf
)
5964 puts_filtered ("\"");
5965 fputstr_filtered (buf
, '"', gdb_stdout
);
5966 puts_filtered ("\"");
5972 return putpkt_binary (buf
, strlen (buf
));
5975 /* Send a packet to the remote machine, with error checking. The data
5976 of the packet is in BUF. The string in BUF can be at most
5977 get_remote_packet_size () - 5 to account for the $, # and checksum,
5978 and for a possible /0 if we are debugging (remote_debug) and want
5979 to print the sent packet as a string. */
5982 putpkt_binary (char *buf
, int cnt
)
5984 struct remote_state
*rs
= get_remote_state ();
5986 unsigned char csum
= 0;
5987 char *buf2
= alloca (cnt
+ 6);
5993 /* Catch cases like trying to read memory or listing threads while
5994 we're waiting for a stop reply. The remote server wouldn't be
5995 ready to handle this request, so we'd hang and timeout. We don't
5996 have to worry about this in synchronous mode, because in that
5997 case it's not possible to issue a command while the target is
5998 running. This is not a problem in non-stop mode, because in that
5999 case, the stub is always ready to process serial input. */
6000 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
6001 error (_("Cannot execute this command while the target is running."));
6003 /* We're sending out a new packet. Make sure we don't look at a
6004 stale cached response. */
6005 rs
->cached_wait_status
= 0;
6007 /* Copy the packet into buffer BUF2, encapsulating it
6008 and giving it a checksum. */
6013 for (i
= 0; i
< cnt
; i
++)
6019 *p
++ = tohex ((csum
>> 4) & 0xf);
6020 *p
++ = tohex (csum
& 0xf);
6022 /* Send it over and over until we get a positive ack. */
6026 int started_error_output
= 0;
6030 struct cleanup
*old_chain
;
6034 str
= escape_buffer (buf2
, p
- buf2
);
6035 old_chain
= make_cleanup (xfree
, str
);
6036 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
6037 gdb_flush (gdb_stdlog
);
6038 do_cleanups (old_chain
);
6040 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6041 perror_with_name (_("putpkt: write failed"));
6043 /* If this is a no acks version of the remote protocol, send the
6044 packet and move on. */
6048 /* Read until either a timeout occurs (-2) or '+' is read.
6049 Handle any notification that arrives in the mean time. */
6052 ch
= readchar (remote_timeout
);
6060 case SERIAL_TIMEOUT
:
6063 if (started_error_output
)
6065 putchar_unfiltered ('\n');
6066 started_error_output
= 0;
6075 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6079 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6080 case SERIAL_TIMEOUT
:
6084 break; /* Retransmit buffer. */
6088 fprintf_unfiltered (gdb_stdlog
,
6089 "Packet instead of Ack, ignoring it\n");
6090 /* It's probably an old response sent because an ACK
6091 was lost. Gobble up the packet and ack it so it
6092 doesn't get retransmitted when we resend this
6095 serial_write (remote_desc
, "+", 1);
6096 continue; /* Now, go look for +. */
6103 /* If we got a notification, handle it, and go back to looking
6105 /* We've found the start of a notification. Now
6106 collect the data. */
6107 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6112 struct cleanup
*old_chain
;
6115 str
= escape_buffer (rs
->buf
, val
);
6116 old_chain
= make_cleanup (xfree
, str
);
6117 fprintf_unfiltered (gdb_stdlog
,
6118 " Notification received: %s\n",
6120 do_cleanups (old_chain
);
6122 handle_notification (rs
->buf
, val
);
6123 /* We're in sync now, rewait for the ack. */
6130 if (!started_error_output
)
6132 started_error_output
= 1;
6133 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6135 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6136 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6145 if (!started_error_output
)
6147 started_error_output
= 1;
6148 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6150 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6154 break; /* Here to retransmit. */
6158 /* This is wrong. If doing a long backtrace, the user should be
6159 able to get out next time we call QUIT, without anything as
6160 violent as interrupt_query. If we want to provide a way out of
6161 here without getting to the next QUIT, it should be based on
6162 hitting ^C twice as in remote_wait. */
6173 /* Come here after finding the start of a frame when we expected an
6174 ack. Do our best to discard the rest of this packet. */
6183 c
= readchar (remote_timeout
);
6186 case SERIAL_TIMEOUT
:
6187 /* Nothing we can do. */
6190 /* Discard the two bytes of checksum and stop. */
6191 c
= readchar (remote_timeout
);
6193 c
= readchar (remote_timeout
);
6196 case '*': /* Run length encoding. */
6197 /* Discard the repeat count. */
6198 c
= readchar (remote_timeout
);
6203 /* A regular character. */
6209 /* Come here after finding the start of the frame. Collect the rest
6210 into *BUF, verifying the checksum, length, and handling run-length
6211 compression. NUL terminate the buffer. If there is not enough room,
6212 expand *BUF using xrealloc.
6214 Returns -1 on error, number of characters in buffer (ignoring the
6215 trailing NULL) on success. (could be extended to return one of the
6216 SERIAL status indications). */
6219 read_frame (char **buf_p
,
6226 struct remote_state
*rs
= get_remote_state ();
6233 c
= readchar (remote_timeout
);
6236 case SERIAL_TIMEOUT
:
6238 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
6242 fputs_filtered ("Saw new packet start in middle of old one\n",
6244 return -1; /* Start a new packet, count retries. */
6247 unsigned char pktcsum
;
6253 check_0
= readchar (remote_timeout
);
6255 check_1
= readchar (remote_timeout
);
6257 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
6260 fputs_filtered ("Timeout in checksum, retrying\n",
6264 else if (check_0
< 0 || check_1
< 0)
6267 fputs_filtered ("Communication error in checksum\n",
6272 /* Don't recompute the checksum; with no ack packets we
6273 don't have any way to indicate a packet retransmission
6278 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
6279 if (csum
== pktcsum
)
6284 struct cleanup
*old_chain
;
6287 str
= escape_buffer (buf
, bc
);
6288 old_chain
= make_cleanup (xfree
, str
);
6289 fprintf_unfiltered (gdb_stdlog
,
6291 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6292 pktcsum
, csum
, str
);
6293 do_cleanups (old_chain
);
6295 /* Number of characters in buffer ignoring trailing
6299 case '*': /* Run length encoding. */
6304 c
= readchar (remote_timeout
);
6306 repeat
= c
- ' ' + 3; /* Compute repeat count. */
6308 /* The character before ``*'' is repeated. */
6310 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
6312 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
6314 /* Make some more room in the buffer. */
6315 *sizeof_buf
+= repeat
;
6316 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6320 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
6326 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
6330 if (bc
>= *sizeof_buf
- 1)
6332 /* Make some more room in the buffer. */
6334 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6345 /* Read a packet from the remote machine, with error checking, and
6346 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6347 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6348 rather than timing out; this is used (in synchronous mode) to wait
6349 for a target that is is executing user code to stop. */
6350 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6351 don't have to change all the calls to getpkt to deal with the
6352 return value, because at the moment I don't know what the right
6353 thing to do it for those. */
6361 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
6365 /* Read a packet from the remote machine, with error checking, and
6366 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6367 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6368 rather than timing out; this is used (in synchronous mode) to wait
6369 for a target that is is executing user code to stop. If FOREVER ==
6370 0, this function is allowed to time out gracefully and return an
6371 indication of this to the caller. Otherwise return the number of
6372 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6373 enough reason to return to the caller. */
6376 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
6377 int expecting_notif
)
6379 struct remote_state
*rs
= get_remote_state ();
6385 /* We're reading a new response. Make sure we don't look at a
6386 previously cached response. */
6387 rs
->cached_wait_status
= 0;
6389 strcpy (*buf
, "timeout");
6392 timeout
= watchdog
> 0 ? watchdog
: -1;
6393 else if (expecting_notif
)
6394 timeout
= 0; /* There should already be a char in the buffer. If
6397 timeout
= remote_timeout
;
6401 /* Process any number of notifications, and then return when
6405 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
6407 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
6409 /* This can loop forever if the remote side sends us
6410 characters continuously, but if it pauses, we'll get
6411 SERIAL_TIMEOUT from readchar because of timeout. Then
6412 we'll count that as a retry.
6414 Note that even when forever is set, we will only wait
6415 forever prior to the start of a packet. After that, we
6416 expect characters to arrive at a brisk pace. They should
6417 show up within remote_timeout intervals. */
6419 c
= readchar (timeout
);
6420 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
6422 if (c
== SERIAL_TIMEOUT
)
6424 if (expecting_notif
)
6425 return -1; /* Don't complain, it's normal to not get
6426 anything in this case. */
6428 if (forever
) /* Watchdog went off? Kill the target. */
6432 error (_("Watchdog timeout has expired. Target detached."));
6435 fputs_filtered ("Timed out.\n", gdb_stdlog
);
6439 /* We've found the start of a packet or notification.
6440 Now collect the data. */
6441 val
= read_frame (buf
, sizeof_buf
);
6446 serial_write (remote_desc
, "-", 1);
6449 if (tries
> MAX_TRIES
)
6451 /* We have tried hard enough, and just can't receive the
6452 packet/notification. Give up. */
6453 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
6455 /* Skip the ack char if we're in no-ack mode. */
6456 if (!rs
->noack_mode
)
6457 serial_write (remote_desc
, "+", 1);
6461 /* If we got an ordinary packet, return that to our caller. */
6466 struct cleanup
*old_chain
;
6469 str
= escape_buffer (*buf
, val
);
6470 old_chain
= make_cleanup (xfree
, str
);
6471 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
6472 do_cleanups (old_chain
);
6475 /* Skip the ack char if we're in no-ack mode. */
6476 if (!rs
->noack_mode
)
6477 serial_write (remote_desc
, "+", 1);
6481 /* If we got a notification, handle it, and go back to looking
6485 gdb_assert (c
== '%');
6489 struct cleanup
*old_chain
;
6492 str
= escape_buffer (*buf
, val
);
6493 old_chain
= make_cleanup (xfree
, str
);
6494 fprintf_unfiltered (gdb_stdlog
,
6495 " Notification received: %s\n",
6497 do_cleanups (old_chain
);
6500 handle_notification (*buf
, val
);
6502 /* Notifications require no acknowledgement. */
6504 if (expecting_notif
)
6511 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
6513 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
6517 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
6519 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
6524 remote_kill (struct target_ops
*ops
)
6526 /* Use catch_errors so the user can quit from gdb even when we
6527 aren't on speaking terms with the remote system. */
6528 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
6530 /* Don't wait for it to die. I'm not really sure it matters whether
6531 we do or not. For the existing stubs, kill is a noop. */
6532 target_mourn_inferior ();
6536 remote_vkill (int pid
, struct remote_state
*rs
)
6538 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6541 /* Tell the remote target to detach. */
6542 sprintf (rs
->buf
, "vKill;%x", pid
);
6544 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6546 if (packet_ok (rs
->buf
,
6547 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
6549 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6556 extended_remote_kill (struct target_ops
*ops
)
6559 int pid
= ptid_get_pid (inferior_ptid
);
6560 struct remote_state
*rs
= get_remote_state ();
6562 res
= remote_vkill (pid
, rs
);
6563 if (res
== -1 && !remote_multi_process_p (rs
))
6565 /* Don't try 'k' on a multi-process aware stub -- it has no way
6566 to specify the pid. */
6570 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6571 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
6574 /* Don't wait for it to die. I'm not really sure it matters whether
6575 we do or not. For the existing stubs, kill is a noop. */
6581 error (_("Can't kill process"));
6583 target_mourn_inferior ();
6587 remote_mourn (struct target_ops
*ops
)
6589 remote_mourn_1 (ops
);
6592 /* Worker function for remote_mourn. */
6594 remote_mourn_1 (struct target_ops
*target
)
6596 unpush_target (target
);
6598 /* remote_close takes care of doing most of the clean up. */
6599 generic_mourn_inferior ();
6603 extended_remote_mourn_1 (struct target_ops
*target
)
6605 struct remote_state
*rs
= get_remote_state ();
6607 /* In case we got here due to an error, but we're going to stay
6609 rs
->waiting_for_stop_reply
= 0;
6611 /* We're no longer interested in these events. */
6612 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
6614 /* If the current general thread belonged to the process we just
6615 detached from or has exited, the remote side current general
6616 thread becomes undefined. Considering a case like this:
6618 - We just got here due to a detach.
6619 - The process that we're detaching from happens to immediately
6620 report a global breakpoint being hit in non-stop mode, in the
6621 same thread we had selected before.
6622 - GDB attaches to this process again.
6623 - This event happens to be the next event we handle.
6625 GDB would consider that the current general thread didn't need to
6626 be set on the stub side (with Hg), since for all it knew,
6627 GENERAL_THREAD hadn't changed.
6629 Notice that although in all-stop mode, the remote server always
6630 sets the current thread to the thread reporting the stop event,
6631 that doesn't happen in non-stop mode; in non-stop, the stub *must
6632 not* change the current thread when reporting a breakpoint hit,
6633 due to the decoupling of event reporting and event handling.
6635 To keep things simple, we always invalidate our notion of the
6637 record_currthread (minus_one_ptid
);
6639 /* Unlike "target remote", we do not want to unpush the target; then
6640 the next time the user says "run", we won't be connected. */
6642 /* Call common code to mark the inferior as not running. */
6643 generic_mourn_inferior ();
6645 if (!have_inferiors ())
6647 if (!remote_multi_process_p (rs
))
6649 /* Check whether the target is running now - some remote stubs
6650 automatically restart after kill. */
6652 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6654 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
6656 /* Assume that the target has been restarted. Set inferior_ptid
6657 so that bits of core GDB realizes there's something here, e.g.,
6658 so that the user can say "kill" again. */
6659 inferior_ptid
= magic_null_ptid
;
6666 extended_remote_mourn (struct target_ops
*ops
)
6668 extended_remote_mourn_1 (ops
);
6672 extended_remote_run (char *args
)
6674 struct remote_state
*rs
= get_remote_state ();
6678 /* If the user has disabled vRun support, or we have detected that
6679 support is not available, do not try it. */
6680 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6683 strcpy (rs
->buf
, "vRun;");
6684 len
= strlen (rs
->buf
);
6686 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
6687 error (_("Remote file name too long for run packet"));
6688 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
6690 gdb_assert (args
!= NULL
);
6693 struct cleanup
*back_to
;
6697 argv
= gdb_buildargv (args
);
6698 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
6699 for (i
= 0; argv
[i
] != NULL
; i
++)
6701 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
6702 error (_("Argument list too long for run packet"));
6703 rs
->buf
[len
++] = ';';
6704 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
6706 do_cleanups (back_to
);
6709 rs
->buf
[len
++] = '\0';
6712 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6714 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
6716 /* We have a wait response; we don't need it, though. All is well. */
6719 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6720 /* It wasn't disabled before, but it is now. */
6724 if (remote_exec_file
[0] == '\0')
6725 error (_("Running the default executable on the remote target failed; "
6726 "try \"set remote exec-file\"?"));
6728 error (_("Running \"%s\" on the remote target failed"),
6733 /* In the extended protocol we want to be able to do things like
6734 "run" and have them basically work as expected. So we need
6735 a special create_inferior function. We support changing the
6736 executable file and the command line arguments, but not the
6740 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
6741 char **env
, int from_tty
)
6743 /* If running asynchronously, register the target file descriptor
6744 with the event loop. */
6745 if (target_can_async_p ())
6746 target_async (inferior_event_handler
, 0);
6748 /* Now restart the remote server. */
6749 if (extended_remote_run (args
) == -1)
6751 /* vRun was not supported. Fail if we need it to do what the
6753 if (remote_exec_file
[0])
6754 error (_("Remote target does not support \"set remote exec-file\""));
6756 error (_("Remote target does not support \"set args\" or run <ARGS>"));
6758 /* Fall back to "R". */
6759 extended_remote_restart ();
6762 /* Clean up from the last time we ran, before we mark the target
6763 running again. This will mark breakpoints uninserted, and
6764 get_offsets may insert breakpoints. */
6765 init_thread_list ();
6766 init_wait_for_inferior ();
6768 /* Now mark the inferior as running before we do anything else. */
6769 inferior_ptid
= magic_null_ptid
;
6771 /* Now, if we have thread information, update inferior_ptid. */
6772 inferior_ptid
= remote_current_thread (inferior_ptid
);
6774 remote_add_inferior (ptid_get_pid (inferior_ptid
), 0);
6775 add_thread_silent (inferior_ptid
);
6777 /* Get updated offsets, if the stub uses qOffsets. */
6782 extended_remote_create_inferior (struct target_ops
*ops
,
6783 char *exec_file
, char *args
,
6784 char **env
, int from_tty
)
6786 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
6790 /* Insert a breakpoint. On targets that have software breakpoint
6791 support, we ask the remote target to do the work; on targets
6792 which don't, we insert a traditional memory breakpoint. */
6795 remote_insert_breakpoint (struct gdbarch
*gdbarch
,
6796 struct bp_target_info
*bp_tgt
)
6798 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
6799 If it succeeds, then set the support to PACKET_ENABLE. If it
6800 fails, and the user has explicitly requested the Z support then
6801 report an error, otherwise, mark it disabled and go on. */
6803 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6805 CORE_ADDR addr
= bp_tgt
->placed_address
;
6806 struct remote_state
*rs
;
6810 gdbarch_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
6812 rs
= get_remote_state ();
6818 addr
= (ULONGEST
) remote_address_masked (addr
);
6819 p
+= hexnumstr (p
, addr
);
6820 sprintf (p
, ",%d", bpsize
);
6823 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6825 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
6830 bp_tgt
->placed_address
= addr
;
6831 bp_tgt
->placed_size
= bpsize
;
6833 case PACKET_UNKNOWN
:
6838 return memory_insert_breakpoint (gdbarch
, bp_tgt
);
6842 remote_remove_breakpoint (struct gdbarch
*gdbarch
,
6843 struct bp_target_info
*bp_tgt
)
6845 CORE_ADDR addr
= bp_tgt
->placed_address
;
6846 struct remote_state
*rs
= get_remote_state ();
6849 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6857 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
6858 p
+= hexnumstr (p
, addr
);
6859 sprintf (p
, ",%d", bp_tgt
->placed_size
);
6862 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6864 return (rs
->buf
[0] == 'E');
6867 return memory_remove_breakpoint (gdbarch
, bp_tgt
);
6871 watchpoint_to_Z_packet (int type
)
6876 return Z_PACKET_WRITE_WP
;
6879 return Z_PACKET_READ_WP
;
6882 return Z_PACKET_ACCESS_WP
;
6885 internal_error (__FILE__
, __LINE__
,
6886 _("hw_bp_to_z: bad watchpoint type %d"), type
);
6891 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
6893 struct remote_state
*rs
= get_remote_state ();
6895 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6897 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6900 sprintf (rs
->buf
, "Z%x,", packet
);
6901 p
= strchr (rs
->buf
, '\0');
6902 addr
= remote_address_masked (addr
);
6903 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6904 sprintf (p
, ",%x", len
);
6907 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6909 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6912 case PACKET_UNKNOWN
:
6917 internal_error (__FILE__
, __LINE__
,
6918 _("remote_insert_watchpoint: reached end of function"));
6923 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
6925 struct remote_state
*rs
= get_remote_state ();
6927 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6929 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6932 sprintf (rs
->buf
, "z%x,", packet
);
6933 p
= strchr (rs
->buf
, '\0');
6934 addr
= remote_address_masked (addr
);
6935 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6936 sprintf (p
, ",%x", len
);
6938 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6940 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6943 case PACKET_UNKNOWN
:
6948 internal_error (__FILE__
, __LINE__
,
6949 _("remote_remove_watchpoint: reached end of function"));
6953 int remote_hw_watchpoint_limit
= -1;
6954 int remote_hw_breakpoint_limit
= -1;
6957 remote_check_watch_resources (int type
, int cnt
, int ot
)
6959 if (type
== bp_hardware_breakpoint
)
6961 if (remote_hw_breakpoint_limit
== 0)
6963 else if (remote_hw_breakpoint_limit
< 0)
6965 else if (cnt
<= remote_hw_breakpoint_limit
)
6970 if (remote_hw_watchpoint_limit
== 0)
6972 else if (remote_hw_watchpoint_limit
< 0)
6976 else if (cnt
<= remote_hw_watchpoint_limit
)
6983 remote_stopped_by_watchpoint (void)
6985 return remote_stopped_by_watchpoint_p
;
6989 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
6992 if (remote_stopped_by_watchpoint ())
6994 *addr_p
= remote_watch_data_address
;
7003 remote_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
7004 struct bp_target_info
*bp_tgt
)
7007 struct remote_state
*rs
;
7010 /* The length field should be set to the size of a breakpoint
7011 instruction, even though we aren't inserting one ourselves. */
7013 gdbarch_breakpoint_from_pc
7014 (gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7016 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7019 rs
= get_remote_state ();
7026 addr
= remote_address_masked (bp_tgt
->placed_address
);
7027 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7028 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7031 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7033 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7036 case PACKET_UNKNOWN
:
7041 internal_error (__FILE__
, __LINE__
,
7042 _("remote_insert_hw_breakpoint: reached end of function"));
7047 remote_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
7048 struct bp_target_info
*bp_tgt
)
7051 struct remote_state
*rs
= get_remote_state ();
7054 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7061 addr
= remote_address_masked (bp_tgt
->placed_address
);
7062 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7063 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7066 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7068 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7071 case PACKET_UNKNOWN
:
7076 internal_error (__FILE__
, __LINE__
,
7077 _("remote_remove_hw_breakpoint: reached end of function"));
7080 /* Table used by the crc32 function to calcuate the checksum. */
7082 static unsigned long crc32_table
[256] =
7085 static unsigned long
7086 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
7088 if (!crc32_table
[1])
7090 /* Initialize the CRC table and the decoding table. */
7094 for (i
= 0; i
< 256; i
++)
7096 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7097 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7104 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7110 /* compare-sections command
7112 With no arguments, compares each loadable section in the exec bfd
7113 with the same memory range on the target, and reports mismatches.
7114 Useful for verifying the image on the target against the exec file.
7115 Depends on the target understanding the new "qCRC:" request. */
7117 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7118 target method (target verify memory) and generic version of the
7119 actual command. This will allow other high-level code (especially
7120 generic_load()) to make use of this target functionality. */
7123 compare_sections_command (char *args
, int from_tty
)
7125 struct remote_state
*rs
= get_remote_state ();
7127 unsigned long host_crc
, target_crc
;
7128 struct cleanup
*old_chain
;
7131 const char *sectname
;
7138 error (_("command cannot be used without an exec file"));
7139 if (!current_target
.to_shortname
||
7140 strcmp (current_target
.to_shortname
, "remote") != 0)
7141 error (_("command can only be used with remote target"));
7143 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7145 if (!(s
->flags
& SEC_LOAD
))
7146 continue; /* skip non-loadable section */
7148 size
= bfd_get_section_size (s
);
7150 continue; /* skip zero-length section */
7152 sectname
= bfd_get_section_name (exec_bfd
, s
);
7153 if (args
&& strcmp (args
, sectname
) != 0)
7154 continue; /* not the section selected by user */
7156 matched
= 1; /* do this section */
7158 /* FIXME: assumes lma can fit into long. */
7159 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7160 (long) lma
, (long) size
);
7163 /* Be clever; compute the host_crc before waiting for target
7165 sectdata
= xmalloc (size
);
7166 old_chain
= make_cleanup (xfree
, sectdata
);
7167 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7168 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
7170 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7171 if (rs
->buf
[0] == 'E')
7172 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
7173 sectname
, paddr (lma
), paddr (lma
+ size
));
7174 if (rs
->buf
[0] != 'C')
7175 error (_("remote target does not support this operation"));
7177 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7178 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7180 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
7181 sectname
, paddr (lma
), paddr (lma
+ size
));
7182 if (host_crc
== target_crc
)
7183 printf_filtered ("matched.\n");
7186 printf_filtered ("MIS-MATCHED!\n");
7190 do_cleanups (old_chain
);
7193 warning (_("One or more sections of the remote executable does not match\n\
7194 the loaded file\n"));
7195 if (args
&& !matched
)
7196 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7199 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7200 into remote target. The number of bytes written to the remote
7201 target is returned, or -1 for error. */
7204 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7205 const char *annex
, const gdb_byte
*writebuf
,
7206 ULONGEST offset
, LONGEST len
,
7207 struct packet_config
*packet
)
7212 struct remote_state
*rs
= get_remote_state ();
7213 int max_size
= get_memory_write_packet_size ();
7215 if (packet
->support
== PACKET_DISABLE
)
7218 /* Insert header. */
7219 i
= snprintf (rs
->buf
, max_size
,
7220 "qXfer:%s:write:%s:%s:",
7221 object_name
, annex
? annex
: "",
7222 phex_nz (offset
, sizeof offset
));
7223 max_size
-= (i
+ 1);
7225 /* Escape as much data as fits into rs->buf. */
7226 buf_len
= remote_escape_output
7227 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
7229 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
7230 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7231 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7234 unpack_varlen_hex (rs
->buf
, &n
);
7238 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7239 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7240 number of bytes read is returned, or 0 for EOF, or -1 for error.
7241 The number of bytes read may be less than LEN without indicating an
7242 EOF. PACKET is checked and updated to indicate whether the remote
7243 target supports this object. */
7246 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
7248 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
7249 struct packet_config
*packet
)
7251 static char *finished_object
;
7252 static char *finished_annex
;
7253 static ULONGEST finished_offset
;
7255 struct remote_state
*rs
= get_remote_state ();
7256 unsigned int total
= 0;
7257 LONGEST i
, n
, packet_len
;
7259 if (packet
->support
== PACKET_DISABLE
)
7262 /* Check whether we've cached an end-of-object packet that matches
7264 if (finished_object
)
7266 if (strcmp (object_name
, finished_object
) == 0
7267 && strcmp (annex
? annex
: "", finished_annex
) == 0
7268 && offset
== finished_offset
)
7271 /* Otherwise, we're now reading something different. Discard
7273 xfree (finished_object
);
7274 xfree (finished_annex
);
7275 finished_object
= NULL
;
7276 finished_annex
= NULL
;
7279 /* Request only enough to fit in a single packet. The actual data
7280 may not, since we don't know how much of it will need to be escaped;
7281 the target is free to respond with slightly less data. We subtract
7282 five to account for the response type and the protocol frame. */
7283 n
= min (get_remote_packet_size () - 5, len
);
7284 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7285 object_name
, annex
? annex
: "",
7286 phex_nz (offset
, sizeof offset
),
7287 phex_nz (n
, sizeof n
));
7288 i
= putpkt (rs
->buf
);
7293 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
7294 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7297 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
7298 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
7300 /* 'm' means there is (or at least might be) more data after this
7301 batch. That does not make sense unless there's at least one byte
7302 of data in this reply. */
7303 if (rs
->buf
[0] == 'm' && packet_len
== 1)
7304 error (_("Remote qXfer reply contained no data."));
7306 /* Got some data. */
7307 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
7309 /* 'l' is an EOF marker, possibly including a final block of data,
7310 or possibly empty. If we have the final block of a non-empty
7311 object, record this fact to bypass a subsequent partial read. */
7312 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
7314 finished_object
= xstrdup (object_name
);
7315 finished_annex
= xstrdup (annex
? annex
: "");
7316 finished_offset
= offset
+ i
;
7323 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
7324 const char *annex
, gdb_byte
*readbuf
,
7325 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
7327 struct remote_state
*rs
;
7332 set_general_thread (inferior_ptid
);
7334 rs
= get_remote_state ();
7336 /* Handle memory using the standard memory routines. */
7337 if (object
== TARGET_OBJECT_MEMORY
)
7342 /* If the remote target is connected but not running, we should
7343 pass this request down to a lower stratum (e.g. the executable
7345 if (!target_has_execution
)
7348 if (writebuf
!= NULL
)
7349 xfered
= remote_write_bytes (offset
, writebuf
, len
);
7351 xfered
= remote_read_bytes (offset
, readbuf
, len
);
7355 else if (xfered
== 0 && errno
== 0)
7361 /* Handle SPU memory using qxfer packets. */
7362 if (object
== TARGET_OBJECT_SPU
)
7365 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
7366 &remote_protocol_packets
7367 [PACKET_qXfer_spu_read
]);
7369 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
7370 &remote_protocol_packets
7371 [PACKET_qXfer_spu_write
]);
7374 /* Handle extra signal info using qxfer packets. */
7375 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
7378 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
7379 &remote_protocol_packets
7380 [PACKET_qXfer_siginfo_read
]);
7382 return remote_write_qxfer (ops
, "siginfo", annex
, writebuf
, offset
, len
,
7383 &remote_protocol_packets
7384 [PACKET_qXfer_siginfo_write
]);
7387 /* Only handle flash writes. */
7388 if (writebuf
!= NULL
)
7394 case TARGET_OBJECT_FLASH
:
7395 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
7399 else if (xfered
== 0 && errno
== 0)
7409 /* Map pre-existing objects onto letters. DO NOT do this for new
7410 objects!!! Instead specify new query packets. */
7413 case TARGET_OBJECT_AVR
:
7417 case TARGET_OBJECT_AUXV
:
7418 gdb_assert (annex
== NULL
);
7419 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
7420 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
7422 case TARGET_OBJECT_AVAILABLE_FEATURES
:
7423 return remote_read_qxfer
7424 (ops
, "features", annex
, readbuf
, offset
, len
,
7425 &remote_protocol_packets
[PACKET_qXfer_features
]);
7427 case TARGET_OBJECT_LIBRARIES
:
7428 return remote_read_qxfer
7429 (ops
, "libraries", annex
, readbuf
, offset
, len
,
7430 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
7432 case TARGET_OBJECT_MEMORY_MAP
:
7433 gdb_assert (annex
== NULL
);
7434 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
7435 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
7437 case TARGET_OBJECT_OSDATA
:
7438 /* Should only get here if we're connected. */
7439 gdb_assert (remote_desc
);
7440 return remote_read_qxfer
7441 (ops
, "osdata", annex
, readbuf
, offset
, len
,
7442 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
7448 /* Note: a zero OFFSET and LEN can be used to query the minimum
7450 if (offset
== 0 && len
== 0)
7451 return (get_remote_packet_size ());
7452 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7453 large enough let the caller deal with it. */
7454 if (len
< get_remote_packet_size ())
7456 len
= get_remote_packet_size ();
7458 /* Except for querying the minimum buffer size, target must be open. */
7460 error (_("remote query is only available after target open"));
7462 gdb_assert (annex
!= NULL
);
7463 gdb_assert (readbuf
!= NULL
);
7469 /* We used one buffer char for the remote protocol q command and
7470 another for the query type. As the remote protocol encapsulation
7471 uses 4 chars plus one extra in case we are debugging
7472 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7475 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
7477 /* Bad caller may have sent forbidden characters. */
7478 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
7483 gdb_assert (annex
[i
] == '\0');
7485 i
= putpkt (rs
->buf
);
7489 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7490 strcpy ((char *) readbuf
, rs
->buf
);
7492 return strlen ((char *) readbuf
);
7496 remote_search_memory (struct target_ops
* ops
,
7497 CORE_ADDR start_addr
, ULONGEST search_space_len
,
7498 const gdb_byte
*pattern
, ULONGEST pattern_len
,
7499 CORE_ADDR
*found_addrp
)
7501 struct remote_state
*rs
= get_remote_state ();
7502 int max_size
= get_memory_write_packet_size ();
7503 struct packet_config
*packet
=
7504 &remote_protocol_packets
[PACKET_qSearch_memory
];
7505 /* number of packet bytes used to encode the pattern,
7506 this could be more than PATTERN_LEN due to escape characters */
7507 int escaped_pattern_len
;
7508 /* amount of pattern that was encodable in the packet */
7509 int used_pattern_len
;
7512 ULONGEST found_addr
;
7514 /* Don't go to the target if we don't have to.
7515 This is done before checking packet->support to avoid the possibility that
7516 a success for this edge case means the facility works in general. */
7517 if (pattern_len
> search_space_len
)
7519 if (pattern_len
== 0)
7521 *found_addrp
= start_addr
;
7525 /* If we already know the packet isn't supported, fall back to the simple
7526 way of searching memory. */
7528 if (packet
->support
== PACKET_DISABLE
)
7530 /* Target doesn't provided special support, fall back and use the
7531 standard support (copy memory and do the search here). */
7532 return simple_search_memory (ops
, start_addr
, search_space_len
,
7533 pattern
, pattern_len
, found_addrp
);
7536 /* Insert header. */
7537 i
= snprintf (rs
->buf
, max_size
,
7538 "qSearch:memory:%s;%s;",
7539 paddr_nz (start_addr
),
7540 phex_nz (search_space_len
, sizeof (search_space_len
)));
7541 max_size
-= (i
+ 1);
7543 /* Escape as much data as fits into rs->buf. */
7544 escaped_pattern_len
=
7545 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
7546 &used_pattern_len
, max_size
);
7548 /* Bail if the pattern is too large. */
7549 if (used_pattern_len
!= pattern_len
)
7550 error ("Pattern is too large to transmit to remote target.");
7552 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
7553 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7554 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7556 /* The request may not have worked because the command is not
7557 supported. If so, fall back to the simple way. */
7558 if (packet
->support
== PACKET_DISABLE
)
7560 return simple_search_memory (ops
, start_addr
, search_space_len
,
7561 pattern
, pattern_len
, found_addrp
);
7566 if (rs
->buf
[0] == '0')
7568 else if (rs
->buf
[0] == '1')
7571 if (rs
->buf
[1] != ',')
7572 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7573 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
7574 *found_addrp
= found_addr
;
7577 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7583 remote_rcmd (char *command
,
7584 struct ui_file
*outbuf
)
7586 struct remote_state
*rs
= get_remote_state ();
7590 error (_("remote rcmd is only available after target open"));
7592 /* Send a NULL command across as an empty command. */
7593 if (command
== NULL
)
7596 /* The query prefix. */
7597 strcpy (rs
->buf
, "qRcmd,");
7598 p
= strchr (rs
->buf
, '\0');
7600 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
7601 error (_("\"monitor\" command ``%s'' is too long."), command
);
7603 /* Encode the actual command. */
7604 bin2hex ((gdb_byte
*) command
, p
, 0);
7606 if (putpkt (rs
->buf
) < 0)
7607 error (_("Communication problem with target."));
7609 /* get/display the response */
7614 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
7616 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7619 error (_("Target does not support this command."));
7620 if (buf
[0] == 'O' && buf
[1] != 'K')
7622 remote_console_output (buf
+ 1); /* 'O' message from stub. */
7625 if (strcmp (buf
, "OK") == 0)
7627 if (strlen (buf
) == 3 && buf
[0] == 'E'
7628 && isdigit (buf
[1]) && isdigit (buf
[2]))
7630 error (_("Protocol error with Rcmd"));
7632 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
7634 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
7635 fputc_unfiltered (c
, outbuf
);
7641 static VEC(mem_region_s
) *
7642 remote_memory_map (struct target_ops
*ops
)
7644 VEC(mem_region_s
) *result
= NULL
;
7645 char *text
= target_read_stralloc (¤t_target
,
7646 TARGET_OBJECT_MEMORY_MAP
, NULL
);
7650 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
7651 result
= parse_memory_map (text
);
7652 do_cleanups (back_to
);
7659 packet_command (char *args
, int from_tty
)
7661 struct remote_state
*rs
= get_remote_state ();
7664 error (_("command can only be used with remote target"));
7667 error (_("remote-packet command requires packet text as argument"));
7669 puts_filtered ("sending: ");
7670 print_packet (args
);
7671 puts_filtered ("\n");
7674 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7675 puts_filtered ("received: ");
7676 print_packet (rs
->buf
);
7677 puts_filtered ("\n");
7681 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
7683 static void display_thread_info (struct gdb_ext_thread_info
*info
);
7685 static void threadset_test_cmd (char *cmd
, int tty
);
7687 static void threadalive_test (char *cmd
, int tty
);
7689 static void threadlist_test_cmd (char *cmd
, int tty
);
7691 int get_and_display_threadinfo (threadref
*ref
);
7693 static void threadinfo_test_cmd (char *cmd
, int tty
);
7695 static int thread_display_step (threadref
*ref
, void *context
);
7697 static void threadlist_update_test_cmd (char *cmd
, int tty
);
7699 static void init_remote_threadtests (void);
7701 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
7704 threadset_test_cmd (char *cmd
, int tty
)
7706 int sample_thread
= SAMPLE_THREAD
;
7708 printf_filtered (_("Remote threadset test\n"));
7709 set_general_thread (sample_thread
);
7714 threadalive_test (char *cmd
, int tty
)
7716 int sample_thread
= SAMPLE_THREAD
;
7717 int pid
= ptid_get_pid (inferior_ptid
);
7718 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
7720 if (remote_thread_alive (ptid
))
7721 printf_filtered ("PASS: Thread alive test\n");
7723 printf_filtered ("FAIL: Thread alive test\n");
7726 void output_threadid (char *title
, threadref
*ref
);
7729 output_threadid (char *title
, threadref
*ref
)
7733 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
7735 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
7739 threadlist_test_cmd (char *cmd
, int tty
)
7742 threadref nextthread
;
7743 int done
, result_count
;
7744 threadref threadlist
[3];
7746 printf_filtered ("Remote Threadlist test\n");
7747 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
7748 &result_count
, &threadlist
[0]))
7749 printf_filtered ("FAIL: threadlist test\n");
7752 threadref
*scan
= threadlist
;
7753 threadref
*limit
= scan
+ result_count
;
7755 while (scan
< limit
)
7756 output_threadid (" thread ", scan
++);
7761 display_thread_info (struct gdb_ext_thread_info
*info
)
7763 output_threadid ("Threadid: ", &info
->threadid
);
7764 printf_filtered ("Name: %s\n ", info
->shortname
);
7765 printf_filtered ("State: %s\n", info
->display
);
7766 printf_filtered ("other: %s\n\n", info
->more_display
);
7770 get_and_display_threadinfo (threadref
*ref
)
7774 struct gdb_ext_thread_info threadinfo
;
7776 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
7777 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
7778 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
7779 display_thread_info (&threadinfo
);
7784 threadinfo_test_cmd (char *cmd
, int tty
)
7786 int athread
= SAMPLE_THREAD
;
7790 int_to_threadref (&thread
, athread
);
7791 printf_filtered ("Remote Threadinfo test\n");
7792 if (!get_and_display_threadinfo (&thread
))
7793 printf_filtered ("FAIL cannot get thread info\n");
7797 thread_display_step (threadref
*ref
, void *context
)
7799 /* output_threadid(" threadstep ",ref); *//* simple test */
7800 return get_and_display_threadinfo (ref
);
7804 threadlist_update_test_cmd (char *cmd
, int tty
)
7806 printf_filtered ("Remote Threadlist update test\n");
7807 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
7811 init_remote_threadtests (void)
7813 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
7814 Fetch and print the remote list of thread identifiers, one pkt only"));
7815 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
7816 _("Fetch and display info about one thread"));
7817 add_com ("tset", class_obscure
, threadset_test_cmd
,
7818 _("Test setting to a different thread"));
7819 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
7820 _("Iterate through updating all remote thread info"));
7821 add_com ("talive", class_obscure
, threadalive_test
,
7822 _(" Remote thread alive test "));
7827 /* Convert a thread ID to a string. Returns the string in a static
7831 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
7833 static char buf
[64];
7834 struct remote_state
*rs
= get_remote_state ();
7836 if (ptid_equal (magic_null_ptid
, ptid
))
7838 xsnprintf (buf
, sizeof buf
, "Thread <main>");
7841 else if (remote_multi_process_p (rs
)
7842 && ptid_get_tid (ptid
) != 0 && ptid_get_pid (ptid
) != 0)
7844 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
7845 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
7848 else if (ptid_get_tid (ptid
) != 0)
7850 xsnprintf (buf
, sizeof buf
, "Thread %ld",
7851 ptid_get_tid (ptid
));
7855 return normal_pid_to_str (ptid
);
7858 /* Get the address of the thread local variable in OBJFILE which is
7859 stored at OFFSET within the thread local storage for thread PTID. */
7862 remote_get_thread_local_address (struct target_ops
*ops
,
7863 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
7865 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
7867 struct remote_state
*rs
= get_remote_state ();
7869 char *endp
= rs
->buf
+ get_remote_packet_size ();
7870 enum packet_result result
;
7872 strcpy (p
, "qGetTLSAddr:");
7874 p
= write_ptid (p
, endp
, ptid
);
7876 p
+= hexnumstr (p
, offset
);
7878 p
+= hexnumstr (p
, lm
);
7882 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7883 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
7884 if (result
== PACKET_OK
)
7888 unpack_varlen_hex (rs
->buf
, &result
);
7891 else if (result
== PACKET_UNKNOWN
)
7892 throw_error (TLS_GENERIC_ERROR
,
7893 _("Remote target doesn't support qGetTLSAddr packet"));
7895 throw_error (TLS_GENERIC_ERROR
,
7896 _("Remote target failed to process qGetTLSAddr request"));
7899 throw_error (TLS_GENERIC_ERROR
,
7900 _("TLS not supported or disabled on this target"));
7905 /* Support for inferring a target description based on the current
7906 architecture and the size of a 'g' packet. While the 'g' packet
7907 can have any size (since optional registers can be left off the
7908 end), some sizes are easily recognizable given knowledge of the
7909 approximate architecture. */
7911 struct remote_g_packet_guess
7914 const struct target_desc
*tdesc
;
7916 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
7917 DEF_VEC_O(remote_g_packet_guess_s
);
7919 struct remote_g_packet_data
7921 VEC(remote_g_packet_guess_s
) *guesses
;
7924 static struct gdbarch_data
*remote_g_packet_data_handle
;
7927 remote_g_packet_data_init (struct obstack
*obstack
)
7929 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
7933 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
7934 const struct target_desc
*tdesc
)
7936 struct remote_g_packet_data
*data
7937 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
7938 struct remote_g_packet_guess new_guess
, *guess
;
7941 gdb_assert (tdesc
!= NULL
);
7944 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7946 if (guess
->bytes
== bytes
)
7947 internal_error (__FILE__
, __LINE__
,
7948 "Duplicate g packet description added for size %d",
7951 new_guess
.bytes
= bytes
;
7952 new_guess
.tdesc
= tdesc
;
7953 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
7956 /* Return 1 if remote_read_description would do anything on this target
7957 and architecture, 0 otherwise. */
7960 remote_read_description_p (struct target_ops
*target
)
7962 struct remote_g_packet_data
*data
7963 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7965 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7971 static const struct target_desc
*
7972 remote_read_description (struct target_ops
*target
)
7974 struct remote_g_packet_data
*data
7975 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7977 /* Do not try this during initial connection, when we do not know
7978 whether there is a running but stopped thread. */
7979 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
7982 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7984 struct remote_g_packet_guess
*guess
;
7986 int bytes
= send_g_packet ();
7989 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7991 if (guess
->bytes
== bytes
)
7992 return guess
->tdesc
;
7994 /* We discard the g packet. A minor optimization would be to
7995 hold on to it, and fill the register cache once we have selected
7996 an architecture, but it's too tricky to do safely. */
8002 /* Remote file transfer support. This is host-initiated I/O, not
8003 target-initiated; for target-initiated, see remote-fileio.c. */
8005 /* If *LEFT is at least the length of STRING, copy STRING to
8006 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8007 decrease *LEFT. Otherwise raise an error. */
8010 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
8012 int len
= strlen (string
);
8015 error (_("Packet too long for target."));
8017 memcpy (*buffer
, string
, len
);
8021 /* NUL-terminate the buffer as a convenience, if there is
8027 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8028 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8029 decrease *LEFT. Otherwise raise an error. */
8032 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8035 if (2 * len
> *left
)
8036 error (_("Packet too long for target."));
8038 bin2hex (bytes
, *buffer
, len
);
8042 /* NUL-terminate the buffer as a convenience, if there is
8048 /* If *LEFT is large enough, convert VALUE to hex and add it to
8049 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8050 decrease *LEFT. Otherwise raise an error. */
8053 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8055 int len
= hexnumlen (value
);
8058 error (_("Packet too long for target."));
8060 hexnumstr (*buffer
, value
);
8064 /* NUL-terminate the buffer as a convenience, if there is
8070 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8071 value, *REMOTE_ERRNO to the remote error number or zero if none
8072 was included, and *ATTACHMENT to point to the start of the annex
8073 if any. The length of the packet isn't needed here; there may
8074 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8076 Return 0 if the packet could be parsed, -1 if it could not. If
8077 -1 is returned, the other variables may not be initialized. */
8080 remote_hostio_parse_result (char *buffer
, int *retcode
,
8081 int *remote_errno
, char **attachment
)
8088 if (buffer
[0] != 'F')
8092 *retcode
= strtol (&buffer
[1], &p
, 16);
8093 if (errno
!= 0 || p
== &buffer
[1])
8096 /* Check for ",errno". */
8100 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8101 if (errno
!= 0 || p
+ 1 == p2
)
8106 /* Check for ";attachment". If there is no attachment, the
8107 packet should end here. */
8110 *attachment
= p
+ 1;
8113 else if (*p
== '\0')
8119 /* Send a prepared I/O packet to the target and read its response.
8120 The prepared packet is in the global RS->BUF before this function
8121 is called, and the answer is there when we return.
8123 COMMAND_BYTES is the length of the request to send, which may include
8124 binary data. WHICH_PACKET is the packet configuration to check
8125 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8126 is set to the error number and -1 is returned. Otherwise the value
8127 returned by the function is returned.
8129 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8130 attachment is expected; an error will be reported if there's a
8131 mismatch. If one is found, *ATTACHMENT will be set to point into
8132 the packet buffer and *ATTACHMENT_LEN will be set to the
8133 attachment's length. */
8136 remote_hostio_send_command (int command_bytes
, int which_packet
,
8137 int *remote_errno
, char **attachment
,
8138 int *attachment_len
)
8140 struct remote_state
*rs
= get_remote_state ();
8141 int ret
, bytes_read
;
8142 char *attachment_tmp
;
8145 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
8147 *remote_errno
= FILEIO_ENOSYS
;
8151 putpkt_binary (rs
->buf
, command_bytes
);
8152 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8154 /* If it timed out, something is wrong. Don't try to parse the
8158 *remote_errno
= FILEIO_EINVAL
;
8162 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
8165 *remote_errno
= FILEIO_EINVAL
;
8167 case PACKET_UNKNOWN
:
8168 *remote_errno
= FILEIO_ENOSYS
;
8174 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
8177 *remote_errno
= FILEIO_EINVAL
;
8181 /* Make sure we saw an attachment if and only if we expected one. */
8182 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
8183 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
8185 *remote_errno
= FILEIO_EINVAL
;
8189 /* If an attachment was found, it must point into the packet buffer;
8190 work out how many bytes there were. */
8191 if (attachment_tmp
!= NULL
)
8193 *attachment
= attachment_tmp
;
8194 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
8200 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8201 remote file descriptor, or -1 if an error occurs (and set
8205 remote_hostio_open (const char *filename
, int flags
, int mode
,
8208 struct remote_state
*rs
= get_remote_state ();
8210 int left
= get_remote_packet_size () - 1;
8212 remote_buffer_add_string (&p
, &left
, "vFile:open:");
8214 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8216 remote_buffer_add_string (&p
, &left
, ",");
8218 remote_buffer_add_int (&p
, &left
, flags
);
8219 remote_buffer_add_string (&p
, &left
, ",");
8221 remote_buffer_add_int (&p
, &left
, mode
);
8223 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
8224 remote_errno
, NULL
, NULL
);
8227 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8228 Return the number of bytes written, or -1 if an error occurs (and
8229 set *REMOTE_ERRNO). */
8232 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
8233 ULONGEST offset
, int *remote_errno
)
8235 struct remote_state
*rs
= get_remote_state ();
8237 int left
= get_remote_packet_size ();
8240 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
8242 remote_buffer_add_int (&p
, &left
, fd
);
8243 remote_buffer_add_string (&p
, &left
, ",");
8245 remote_buffer_add_int (&p
, &left
, offset
);
8246 remote_buffer_add_string (&p
, &left
, ",");
8248 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
8249 get_remote_packet_size () - (p
- rs
->buf
));
8251 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
8252 remote_errno
, NULL
, NULL
);
8255 /* Read up to LEN bytes FD on the remote target into READ_BUF
8256 Return the number of bytes read, or -1 if an error occurs (and
8257 set *REMOTE_ERRNO). */
8260 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
8261 ULONGEST offset
, int *remote_errno
)
8263 struct remote_state
*rs
= get_remote_state ();
8266 int left
= get_remote_packet_size ();
8267 int ret
, attachment_len
;
8270 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
8272 remote_buffer_add_int (&p
, &left
, fd
);
8273 remote_buffer_add_string (&p
, &left
, ",");
8275 remote_buffer_add_int (&p
, &left
, len
);
8276 remote_buffer_add_string (&p
, &left
, ",");
8278 remote_buffer_add_int (&p
, &left
, offset
);
8280 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
8281 remote_errno
, &attachment
,
8287 read_len
= remote_unescape_input (attachment
, attachment_len
,
8289 if (read_len
!= ret
)
8290 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
8295 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8296 (and set *REMOTE_ERRNO). */
8299 remote_hostio_close (int fd
, int *remote_errno
)
8301 struct remote_state
*rs
= get_remote_state ();
8303 int left
= get_remote_packet_size () - 1;
8305 remote_buffer_add_string (&p
, &left
, "vFile:close:");
8307 remote_buffer_add_int (&p
, &left
, fd
);
8309 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
8310 remote_errno
, NULL
, NULL
);
8313 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8314 occurs (and set *REMOTE_ERRNO). */
8317 remote_hostio_unlink (const char *filename
, int *remote_errno
)
8319 struct remote_state
*rs
= get_remote_state ();
8321 int left
= get_remote_packet_size () - 1;
8323 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
8325 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8328 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
8329 remote_errno
, NULL
, NULL
);
8333 remote_fileio_errno_to_host (int errnum
)
8357 case FILEIO_ENOTDIR
:
8377 case FILEIO_ENAMETOOLONG
:
8378 return ENAMETOOLONG
;
8384 remote_hostio_error (int errnum
)
8386 int host_error
= remote_fileio_errno_to_host (errnum
);
8388 if (host_error
== -1)
8389 error (_("Unknown remote I/O error %d"), errnum
);
8391 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
8395 remote_hostio_close_cleanup (void *opaque
)
8397 int fd
= *(int *) opaque
;
8400 remote_hostio_close (fd
, &remote_errno
);
8405 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
8407 const char *filename
= bfd_get_filename (abfd
);
8408 int fd
, remote_errno
;
8411 gdb_assert (remote_filename_p (filename
));
8413 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
8416 errno
= remote_fileio_errno_to_host (remote_errno
);
8417 bfd_set_error (bfd_error_system_call
);
8421 stream
= xmalloc (sizeof (int));
8427 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
8429 int fd
= *(int *)stream
;
8434 /* Ignore errors on close; these may happen if the remote
8435 connection was already torn down. */
8436 remote_hostio_close (fd
, &remote_errno
);
8442 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
8443 file_ptr nbytes
, file_ptr offset
)
8445 int fd
= *(int *)stream
;
8447 file_ptr pos
, bytes
;
8450 while (nbytes
> pos
)
8452 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
8453 offset
+ pos
, &remote_errno
);
8455 /* Success, but no bytes, means end-of-file. */
8459 errno
= remote_fileio_errno_to_host (remote_errno
);
8460 bfd_set_error (bfd_error_system_call
);
8471 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
8473 /* FIXME: We should probably implement remote_hostio_stat. */
8474 sb
->st_size
= INT_MAX
;
8479 remote_filename_p (const char *filename
)
8481 return strncmp (filename
, "remote:", 7) == 0;
8485 remote_bfd_open (const char *remote_file
, const char *target
)
8487 return bfd_openr_iovec (remote_file
, target
,
8488 remote_bfd_iovec_open
, NULL
,
8489 remote_bfd_iovec_pread
,
8490 remote_bfd_iovec_close
,
8491 remote_bfd_iovec_stat
);
8495 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
8497 struct cleanup
*back_to
, *close_cleanup
;
8498 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8501 int bytes_in_buffer
;
8506 error (_("command can only be used with remote target"));
8508 file
= fopen (local_file
, "rb");
8510 perror_with_name (local_file
);
8511 back_to
= make_cleanup_fclose (file
);
8513 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
8515 0700, &remote_errno
);
8517 remote_hostio_error (remote_errno
);
8519 /* Send up to this many bytes at once. They won't all fit in the
8520 remote packet limit, so we'll transfer slightly fewer. */
8521 io_size
= get_remote_packet_size ();
8522 buffer
= xmalloc (io_size
);
8523 make_cleanup (xfree
, buffer
);
8525 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8527 bytes_in_buffer
= 0;
8530 while (bytes_in_buffer
|| !saw_eof
)
8534 bytes
= fread (buffer
+ bytes_in_buffer
, 1, io_size
- bytes_in_buffer
,
8539 error (_("Error reading %s."), local_file
);
8542 /* EOF. Unless there is something still in the
8543 buffer from the last iteration, we are done. */
8545 if (bytes_in_buffer
== 0)
8553 bytes
+= bytes_in_buffer
;
8554 bytes_in_buffer
= 0;
8556 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
, offset
, &remote_errno
);
8559 remote_hostio_error (remote_errno
);
8560 else if (retcode
== 0)
8561 error (_("Remote write of %d bytes returned 0!"), bytes
);
8562 else if (retcode
< bytes
)
8564 /* Short write. Save the rest of the read data for the next
8566 bytes_in_buffer
= bytes
- retcode
;
8567 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
8573 discard_cleanups (close_cleanup
);
8574 if (remote_hostio_close (fd
, &remote_errno
))
8575 remote_hostio_error (remote_errno
);
8578 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
8579 do_cleanups (back_to
);
8583 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
8585 struct cleanup
*back_to
, *close_cleanup
;
8586 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8592 error (_("command can only be used with remote target"));
8594 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
8596 remote_hostio_error (remote_errno
);
8598 file
= fopen (local_file
, "wb");
8600 perror_with_name (local_file
);
8601 back_to
= make_cleanup_fclose (file
);
8603 /* Send up to this many bytes at once. They won't all fit in the
8604 remote packet limit, so we'll transfer slightly fewer. */
8605 io_size
= get_remote_packet_size ();
8606 buffer
= xmalloc (io_size
);
8607 make_cleanup (xfree
, buffer
);
8609 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8614 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
8616 /* Success, but no bytes, means end-of-file. */
8619 remote_hostio_error (remote_errno
);
8623 bytes
= fwrite (buffer
, 1, bytes
, file
);
8625 perror_with_name (local_file
);
8628 discard_cleanups (close_cleanup
);
8629 if (remote_hostio_close (fd
, &remote_errno
))
8630 remote_hostio_error (remote_errno
);
8633 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
8634 do_cleanups (back_to
);
8638 remote_file_delete (const char *remote_file
, int from_tty
)
8640 int retcode
, remote_errno
;
8643 error (_("command can only be used with remote target"));
8645 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
8647 remote_hostio_error (remote_errno
);
8650 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
8654 remote_put_command (char *args
, int from_tty
)
8656 struct cleanup
*back_to
;
8660 error_no_arg (_("file to put"));
8662 argv
= gdb_buildargv (args
);
8663 back_to
= make_cleanup_freeargv (argv
);
8664 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8665 error (_("Invalid parameters to remote put"));
8667 remote_file_put (argv
[0], argv
[1], from_tty
);
8669 do_cleanups (back_to
);
8673 remote_get_command (char *args
, int from_tty
)
8675 struct cleanup
*back_to
;
8679 error_no_arg (_("file to get"));
8681 argv
= gdb_buildargv (args
);
8682 back_to
= make_cleanup_freeargv (argv
);
8683 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8684 error (_("Invalid parameters to remote get"));
8686 remote_file_get (argv
[0], argv
[1], from_tty
);
8688 do_cleanups (back_to
);
8692 remote_delete_command (char *args
, int from_tty
)
8694 struct cleanup
*back_to
;
8698 error_no_arg (_("file to delete"));
8700 argv
= gdb_buildargv (args
);
8701 back_to
= make_cleanup_freeargv (argv
);
8702 if (argv
[0] == NULL
|| argv
[1] != NULL
)
8703 error (_("Invalid parameters to remote delete"));
8705 remote_file_delete (argv
[0], from_tty
);
8707 do_cleanups (back_to
);
8711 remote_command (char *args
, int from_tty
)
8713 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
8716 static int remote_target_can_reverse
= 1;
8719 remote_can_execute_reverse (void)
8721 return remote_target_can_reverse
;
8725 remote_supports_non_stop (void)
8731 remote_supports_multi_process (void)
8733 struct remote_state
*rs
= get_remote_state ();
8734 return remote_multi_process_p (rs
);
8738 init_remote_ops (void)
8740 remote_ops
.to_shortname
= "remote";
8741 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
8743 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8744 Specify the serial device it is connected to\n\
8745 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
8746 remote_ops
.to_open
= remote_open
;
8747 remote_ops
.to_close
= remote_close
;
8748 remote_ops
.to_detach
= remote_detach
;
8749 remote_ops
.to_disconnect
= remote_disconnect
;
8750 remote_ops
.to_resume
= remote_resume
;
8751 remote_ops
.to_wait
= remote_wait
;
8752 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
8753 remote_ops
.to_store_registers
= remote_store_registers
;
8754 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
8755 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
8756 remote_ops
.to_files_info
= remote_files_info
;
8757 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
8758 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
8759 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
8760 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
8761 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
8762 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
8763 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
8764 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
8765 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
8766 remote_ops
.to_kill
= remote_kill
;
8767 remote_ops
.to_load
= generic_load
;
8768 remote_ops
.to_mourn_inferior
= remote_mourn
;
8769 remote_ops
.to_thread_alive
= remote_thread_alive
;
8770 remote_ops
.to_find_new_threads
= remote_threads_info
;
8771 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
8772 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
8773 remote_ops
.to_stop
= remote_stop
;
8774 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
8775 remote_ops
.to_rcmd
= remote_rcmd
;
8776 remote_ops
.to_log_command
= serial_log_command
;
8777 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
8778 remote_ops
.to_stratum
= process_stratum
;
8779 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
8780 remote_ops
.to_has_memory
= default_child_has_memory
;
8781 remote_ops
.to_has_stack
= default_child_has_stack
;
8782 remote_ops
.to_has_registers
= default_child_has_registers
;
8783 remote_ops
.to_has_execution
= default_child_has_execution
;
8784 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
8785 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
8786 remote_ops
.to_magic
= OPS_MAGIC
;
8787 remote_ops
.to_memory_map
= remote_memory_map
;
8788 remote_ops
.to_flash_erase
= remote_flash_erase
;
8789 remote_ops
.to_flash_done
= remote_flash_done
;
8790 remote_ops
.to_read_description
= remote_read_description
;
8791 remote_ops
.to_search_memory
= remote_search_memory
;
8792 remote_ops
.to_can_async_p
= remote_can_async_p
;
8793 remote_ops
.to_is_async_p
= remote_is_async_p
;
8794 remote_ops
.to_async
= remote_async
;
8795 remote_ops
.to_async_mask
= remote_async_mask
;
8796 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
8797 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
8798 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
8799 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
8802 /* Set up the extended remote vector by making a copy of the standard
8803 remote vector and adding to it. */
8806 init_extended_remote_ops (void)
8808 extended_remote_ops
= remote_ops
;
8810 extended_remote_ops
.to_shortname
= "extended-remote";
8811 extended_remote_ops
.to_longname
=
8812 "Extended remote serial target in gdb-specific protocol";
8813 extended_remote_ops
.to_doc
=
8814 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8815 Specify the serial device it is connected to (e.g. /dev/ttya).";
8816 extended_remote_ops
.to_open
= extended_remote_open
;
8817 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
8818 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
8819 extended_remote_ops
.to_detach
= extended_remote_detach
;
8820 extended_remote_ops
.to_attach
= extended_remote_attach
;
8821 extended_remote_ops
.to_kill
= extended_remote_kill
;
8825 remote_can_async_p (void)
8827 if (!target_async_permitted
)
8828 /* We only enable async when the user specifically asks for it. */
8831 /* We're async whenever the serial device is. */
8832 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
8836 remote_is_async_p (void)
8838 if (!target_async_permitted
)
8839 /* We only enable async when the user specifically asks for it. */
8842 /* We're async whenever the serial device is. */
8843 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
8846 /* Pass the SERIAL event on and up to the client. One day this code
8847 will be able to delay notifying the client of an event until the
8848 point where an entire packet has been received. */
8850 static void (*async_client_callback
) (enum inferior_event_type event_type
,
8852 static void *async_client_context
;
8853 static serial_event_ftype remote_async_serial_handler
;
8856 remote_async_serial_handler (struct serial
*scb
, void *context
)
8858 /* Don't propogate error information up to the client. Instead let
8859 the client find out about the error by querying the target. */
8860 async_client_callback (INF_REG_EVENT
, async_client_context
);
8864 remote_async_inferior_event_handler (gdb_client_data data
)
8866 inferior_event_handler (INF_REG_EVENT
, NULL
);
8870 remote_async_get_pending_events_handler (gdb_client_data data
)
8872 remote_get_pending_stop_replies ();
8876 remote_async (void (*callback
) (enum inferior_event_type event_type
,
8877 void *context
), void *context
)
8879 if (remote_async_mask_value
== 0)
8880 internal_error (__FILE__
, __LINE__
,
8881 _("Calling remote_async when async is masked"));
8883 if (callback
!= NULL
)
8885 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
8886 async_client_callback
= callback
;
8887 async_client_context
= context
;
8890 serial_async (remote_desc
, NULL
, NULL
);
8894 remote_async_mask (int new_mask
)
8896 int curr_mask
= remote_async_mask_value
;
8897 remote_async_mask_value
= new_mask
;
8902 set_remote_cmd (char *args
, int from_tty
)
8904 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
8908 show_remote_cmd (char *args
, int from_tty
)
8910 /* We can't just use cmd_show_list here, because we want to skip
8911 the redundant "show remote Z-packet" and the legacy aliases. */
8912 struct cleanup
*showlist_chain
;
8913 struct cmd_list_element
*list
= remote_show_cmdlist
;
8915 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
8916 for (; list
!= NULL
; list
= list
->next
)
8917 if (strcmp (list
->name
, "Z-packet") == 0)
8919 else if (list
->type
== not_set_cmd
)
8920 /* Alias commands are exactly like the original, except they
8921 don't have the normal type. */
8925 struct cleanup
*option_chain
8926 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
8927 ui_out_field_string (uiout
, "name", list
->name
);
8928 ui_out_text (uiout
, ": ");
8929 if (list
->type
== show_cmd
)
8930 do_setshow_command ((char *) NULL
, from_tty
, list
);
8932 cmd_func (list
, NULL
, from_tty
);
8933 /* Close the tuple. */
8934 do_cleanups (option_chain
);
8937 /* Close the tuple. */
8938 do_cleanups (showlist_chain
);
8942 /* Function to be called whenever a new objfile (shlib) is detected. */
8944 remote_new_objfile (struct objfile
*objfile
)
8946 if (remote_desc
!= 0) /* Have a remote connection. */
8947 remote_check_symbols (objfile
);
8951 _initialize_remote (void)
8953 struct remote_state
*rs
;
8955 /* architecture specific data */
8956 remote_gdbarch_data_handle
=
8957 gdbarch_data_register_post_init (init_remote_state
);
8958 remote_g_packet_data_handle
=
8959 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
8961 /* Initialize the per-target state. At the moment there is only one
8962 of these, not one per target. Only one target is active at a
8963 time. The default buffer size is unimportant; it will be expanded
8964 whenever a larger buffer is needed. */
8965 rs
= get_remote_state_raw ();
8967 rs
->buf
= xmalloc (rs
->buf_size
);
8970 add_target (&remote_ops
);
8972 init_extended_remote_ops ();
8973 add_target (&extended_remote_ops
);
8975 /* Hook into new objfile notification. */
8976 observer_attach_new_objfile (remote_new_objfile
);
8978 /* Set up signal handlers. */
8979 sigint_remote_token
=
8980 create_async_signal_handler (async_remote_interrupt
, NULL
);
8981 sigint_remote_twice_token
=
8982 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
8985 init_remote_threadtests ();
8988 /* set/show remote ... */
8990 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
8991 Remote protocol specific variables\n\
8992 Configure various remote-protocol specific variables such as\n\
8993 the packets being used"),
8994 &remote_set_cmdlist
, "set remote ",
8995 0 /* allow-unknown */, &setlist
);
8996 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
8997 Remote protocol specific variables\n\
8998 Configure various remote-protocol specific variables such as\n\
8999 the packets being used"),
9000 &remote_show_cmdlist
, "show remote ",
9001 0 /* allow-unknown */, &showlist
);
9003 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
9004 Compare section data on target to the exec file.\n\
9005 Argument is a single section name (default: all loaded sections)."),
9008 add_cmd ("packet", class_maintenance
, packet_command
, _("\
9009 Send an arbitrary packet to a remote target.\n\
9010 maintenance packet TEXT\n\
9011 If GDB is talking to an inferior via the GDB serial protocol, then\n\
9012 this command sends the string TEXT to the inferior, and displays the\n\
9013 response packet. GDB supplies the initial `$' character, and the\n\
9014 terminating `#' character and checksum."),
9017 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
9018 Set whether to send break if interrupted."), _("\
9019 Show whether to send break if interrupted."), _("\
9020 If set, a break, instead of a cntrl-c, is sent to the remote target."),
9021 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
9022 &setlist
, &showlist
);
9024 /* Install commands for configuring memory read/write packets. */
9026 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
9027 Set the maximum number of bytes per memory write packet (deprecated)."),
9029 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
9030 Show the maximum number of bytes per memory write packet (deprecated)."),
9032 add_cmd ("memory-write-packet-size", no_class
,
9033 set_memory_write_packet_size
, _("\
9034 Set the maximum number of bytes per memory-write packet.\n\
9035 Specify the number of bytes in a packet or 0 (zero) for the\n\
9036 default packet size. The actual limit is further reduced\n\
9037 dependent on the target. Specify ``fixed'' to disable the\n\
9038 further restriction and ``limit'' to enable that restriction."),
9039 &remote_set_cmdlist
);
9040 add_cmd ("memory-read-packet-size", no_class
,
9041 set_memory_read_packet_size
, _("\
9042 Set the maximum number of bytes per memory-read packet.\n\
9043 Specify the number of bytes in a packet or 0 (zero) for the\n\
9044 default packet size. The actual limit is further reduced\n\
9045 dependent on the target. Specify ``fixed'' to disable the\n\
9046 further restriction and ``limit'' to enable that restriction."),
9047 &remote_set_cmdlist
);
9048 add_cmd ("memory-write-packet-size", no_class
,
9049 show_memory_write_packet_size
,
9050 _("Show the maximum number of bytes per memory-write packet."),
9051 &remote_show_cmdlist
);
9052 add_cmd ("memory-read-packet-size", no_class
,
9053 show_memory_read_packet_size
,
9054 _("Show the maximum number of bytes per memory-read packet."),
9055 &remote_show_cmdlist
);
9057 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
9058 &remote_hw_watchpoint_limit
, _("\
9059 Set the maximum number of target hardware watchpoints."), _("\
9060 Show the maximum number of target hardware watchpoints."), _("\
9061 Specify a negative limit for unlimited."),
9062 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
9063 &remote_set_cmdlist
, &remote_show_cmdlist
);
9064 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
9065 &remote_hw_breakpoint_limit
, _("\
9066 Set the maximum number of target hardware breakpoints."), _("\
9067 Show the maximum number of target hardware breakpoints."), _("\
9068 Specify a negative limit for unlimited."),
9069 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
9070 &remote_set_cmdlist
, &remote_show_cmdlist
);
9072 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
9073 &remote_address_size
, _("\
9074 Set the maximum size of the address (in bits) in a memory packet."), _("\
9075 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
9077 NULL
, /* FIXME: i18n: */
9078 &setlist
, &showlist
);
9080 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
9081 "X", "binary-download", 1);
9083 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
9084 "vCont", "verbose-resume", 0);
9086 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
9087 "QPassSignals", "pass-signals", 0);
9089 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
9090 "qSymbol", "symbol-lookup", 0);
9092 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
9093 "P", "set-register", 1);
9095 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
9096 "p", "fetch-register", 1);
9098 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
9099 "Z0", "software-breakpoint", 0);
9101 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
9102 "Z1", "hardware-breakpoint", 0);
9104 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
9105 "Z2", "write-watchpoint", 0);
9107 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
9108 "Z3", "read-watchpoint", 0);
9110 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
9111 "Z4", "access-watchpoint", 0);
9113 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
9114 "qXfer:auxv:read", "read-aux-vector", 0);
9116 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
9117 "qXfer:features:read", "target-features", 0);
9119 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
9120 "qXfer:libraries:read", "library-info", 0);
9122 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
9123 "qXfer:memory-map:read", "memory-map", 0);
9125 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
9126 "qXfer:spu:read", "read-spu-object", 0);
9128 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
9129 "qXfer:spu:write", "write-spu-object", 0);
9131 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
9132 "qXfer:osdata:read", "osdata", 0);
9134 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
9135 "qXfer:siginfo:read", "read-siginfo-object", 0);
9137 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
9138 "qXfer:siginfo:write", "write-siginfo-object", 0);
9140 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
9141 "qGetTLSAddr", "get-thread-local-storage-address",
9144 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
9145 "qSupported", "supported-packets", 0);
9147 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
9148 "qSearch:memory", "search-memory", 0);
9150 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
9151 "vFile:open", "hostio-open", 0);
9153 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
9154 "vFile:pread", "hostio-pread", 0);
9156 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
9157 "vFile:pwrite", "hostio-pwrite", 0);
9159 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
9160 "vFile:close", "hostio-close", 0);
9162 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
9163 "vFile:unlink", "hostio-unlink", 0);
9165 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
9166 "vAttach", "attach", 0);
9168 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
9171 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
9172 "QStartNoAckMode", "noack", 0);
9174 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
9175 "vKill", "kill", 0);
9177 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
9178 "qAttached", "query-attached", 0);
9180 /* Keep the old ``set remote Z-packet ...'' working. Each individual
9181 Z sub-packet has its own set and show commands, but users may
9182 have sets to this variable in their .gdbinit files (or in their
9184 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
9185 &remote_Z_packet_detect
, _("\
9186 Set use of remote protocol `Z' packets"), _("\
9187 Show use of remote protocol `Z' packets "), _("\
9188 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
9190 set_remote_protocol_Z_packet_cmd
,
9191 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
9192 &remote_set_cmdlist
, &remote_show_cmdlist
);
9194 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
9195 Manipulate files on the remote system\n\
9196 Transfer files to and from the remote target system."),
9197 &remote_cmdlist
, "remote ",
9198 0 /* allow-unknown */, &cmdlist
);
9200 add_cmd ("put", class_files
, remote_put_command
,
9201 _("Copy a local file to the remote system."),
9204 add_cmd ("get", class_files
, remote_get_command
,
9205 _("Copy a remote file to the local system."),
9208 add_cmd ("delete", class_files
, remote_delete_command
,
9209 _("Delete a remote file."),
9212 remote_exec_file
= xstrdup ("");
9213 add_setshow_string_noescape_cmd ("exec-file", class_files
,
9214 &remote_exec_file
, _("\
9215 Set the remote pathname for \"run\""), _("\
9216 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
9217 &remote_set_cmdlist
, &remote_show_cmdlist
);
9219 /* Eventually initialize fileio. See fileio.c */
9220 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
9222 /* Take advantage of the fact that the LWP field is not used, to tag
9223 special ptids with it set to != 0. */
9224 magic_null_ptid
= ptid_build (42000, 1, -1);
9225 not_sent_ptid
= ptid_build (42000, 1, -2);
9226 any_thread_ptid
= ptid_build (42000, 1, 0);