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 (void);
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
,
998 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1001 set_remote_protocol_packet_cmd (char *args
, int from_tty
,
1002 struct cmd_list_element
*c
)
1004 struct packet_config
*packet
;
1006 for (packet
= remote_protocol_packets
;
1007 packet
< &remote_protocol_packets
[PACKET_MAX
];
1010 if (&packet
->detect
== c
->var
)
1012 update_packet_config (packet
);
1016 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1021 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1022 struct cmd_list_element
*c
,
1025 struct packet_config
*packet
;
1027 for (packet
= remote_protocol_packets
;
1028 packet
< &remote_protocol_packets
[PACKET_MAX
];
1031 if (&packet
->detect
== c
->var
)
1033 show_packet_config_cmd (packet
);
1037 internal_error (__FILE__
, __LINE__
, "Could not find config for %s",
1041 /* Should we try one of the 'Z' requests? */
1045 Z_PACKET_SOFTWARE_BP
,
1046 Z_PACKET_HARDWARE_BP
,
1053 /* For compatibility with older distributions. Provide a ``set remote
1054 Z-packet ...'' command that updates all the Z packet types. */
1056 static enum auto_boolean remote_Z_packet_detect
;
1059 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1060 struct cmd_list_element
*c
)
1063 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1065 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1066 update_packet_config (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1071 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1072 struct cmd_list_element
*c
,
1076 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1078 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1082 /* Should we try the 'ThreadInfo' query packet?
1084 This variable (NOT available to the user: auto-detect only!)
1085 determines whether GDB will use the new, simpler "ThreadInfo"
1086 query or the older, more complex syntax for thread queries.
1087 This is an auto-detect variable (set to true at each connect,
1088 and set to false when the target fails to recognize it). */
1090 static int use_threadinfo_query
;
1091 static int use_threadextra_query
;
1093 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1094 static struct async_signal_handler
*sigint_remote_twice_token
;
1095 static struct async_signal_handler
*sigint_remote_token
;
1098 /* Asynchronous signal handle registered as event loop source for
1099 when we have pending events ready to be passed to the core. */
1101 static struct async_event_handler
*remote_async_inferior_event_token
;
1103 /* Asynchronous signal handle registered as event loop source for when
1104 the remote sent us a %Stop notification. The registered callback
1105 will do a vStopped sequence to pull the rest of the events out of
1106 the remote side into our event queue. */
1108 static struct async_event_handler
*remote_async_get_pending_events_token
;
1111 static ptid_t magic_null_ptid
;
1112 static ptid_t not_sent_ptid
;
1113 static ptid_t any_thread_ptid
;
1115 /* These are the threads which we last sent to the remote system. The
1116 TID member will be -1 for all or -2 for not sent yet. */
1118 static ptid_t general_thread
;
1119 static ptid_t continue_thread
;
1121 /* Add PID to GDB's inferior table. Since we can be connected to a
1122 remote system before before knowing about any inferior, mark the
1123 target with execution when we find the first inferior. */
1125 static struct inferior
*
1126 remote_add_inferior (int pid
)
1128 struct remote_state
*rs
= get_remote_state ();
1129 struct inferior
*inf
;
1131 inf
= add_inferior (pid
);
1133 /* This may be the first inferior we hear about. */
1134 if (!target_has_execution
)
1137 target_mark_running (&extended_remote_ops
);
1139 target_mark_running (&remote_ops
);
1145 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1146 according to RUNNING. */
1149 remote_add_thread (ptid_t ptid
, int running
)
1153 set_executing (ptid
, running
);
1154 set_running (ptid
, running
);
1157 /* Come here when we learn about a thread id from the remote target.
1158 It may be the first time we hear about such thread, so take the
1159 opportunity to add it to GDB's thread list. In case this is the
1160 first time we're noticing its corresponding inferior, add it to
1161 GDB's inferior list as well. */
1164 remote_notice_new_inferior (ptid_t currthread
, int running
)
1166 struct remote_state
*rs
= get_remote_state ();
1168 /* If this is a new thread, add it to GDB's thread list.
1169 If we leave it up to WFI to do this, bad things will happen. */
1171 if (in_thread_list (currthread
) && is_exited (currthread
))
1173 /* We're seeing an event on a thread id we knew had exited.
1174 This has to be a new thread reusing the old id. Add it. */
1175 remote_add_thread (currthread
, running
);
1179 if (!in_thread_list (currthread
))
1181 struct inferior
*inf
= NULL
;
1183 if (ptid_equal (pid_to_ptid (ptid_get_pid (currthread
)), inferior_ptid
))
1185 /* inferior_ptid has no thread member yet. This can happen
1186 with the vAttach -> remote_wait,"TAAthread:" path if the
1187 stub doesn't support qC. This is the first stop reported
1188 after an attach, so this is the main thread. Update the
1189 ptid in the thread list. */
1190 thread_change_ptid (inferior_ptid
, currthread
);
1194 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1196 /* inferior_ptid is not set yet. This can happen with the
1197 vRun -> remote_wait,"TAAthread:" path if the stub
1198 doesn't support qC. This is the first stop reported
1199 after an attach, so this is the main thread. Update the
1200 ptid in the thread list. */
1201 thread_change_ptid (inferior_ptid
, currthread
);
1205 /* When connecting to a target remote, or to a target
1206 extended-remote which already was debugging an inferior, we
1207 may not know about it yet. Add it before adding its child
1208 thread, so notifications are emitted in a sensible order. */
1209 if (!in_inferior_list (ptid_get_pid (currthread
)))
1210 inf
= remote_add_inferior (ptid_get_pid (currthread
));
1212 /* This is really a new thread. Add it. */
1213 remote_add_thread (currthread
, running
);
1215 /* If we found a new inferior, let the common code do whatever
1216 it needs to with it (e.g., read shared libraries, insert
1219 notice_new_inferior (currthread
, running
, 0);
1223 /* Call this function as a result of
1224 1) A halt indication (T packet) containing a thread id
1225 2) A direct query of currthread
1226 3) Successful execution of set thread
1230 record_currthread (ptid_t currthread
)
1232 general_thread
= currthread
;
1234 if (ptid_equal (currthread
, minus_one_ptid
))
1235 /* We're just invalidating the local thread mirror. */
1238 remote_notice_new_inferior (currthread
, 0);
1241 static char *last_pass_packet
;
1243 /* If 'QPassSignals' is supported, tell the remote stub what signals
1244 it can simply pass through to the inferior without reporting. */
1247 remote_pass_signals (void)
1249 if (remote_protocol_packets
[PACKET_QPassSignals
].support
!= PACKET_DISABLE
)
1251 char *pass_packet
, *p
;
1252 int numsigs
= (int) TARGET_SIGNAL_LAST
;
1255 gdb_assert (numsigs
< 256);
1256 for (i
= 0; i
< numsigs
; i
++)
1258 if (signal_stop_state (i
) == 0
1259 && signal_print_state (i
) == 0
1260 && signal_pass_state (i
) == 1)
1263 pass_packet
= xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1264 strcpy (pass_packet
, "QPassSignals:");
1265 p
= pass_packet
+ strlen (pass_packet
);
1266 for (i
= 0; i
< numsigs
; i
++)
1268 if (signal_stop_state (i
) == 0
1269 && signal_print_state (i
) == 0
1270 && signal_pass_state (i
) == 1)
1273 *p
++ = tohex (i
>> 4);
1274 *p
++ = tohex (i
& 15);
1283 if (!last_pass_packet
|| strcmp (last_pass_packet
, pass_packet
))
1285 struct remote_state
*rs
= get_remote_state ();
1286 char *buf
= rs
->buf
;
1288 putpkt (pass_packet
);
1289 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1290 packet_ok (buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1291 if (last_pass_packet
)
1292 xfree (last_pass_packet
);
1293 last_pass_packet
= pass_packet
;
1296 xfree (pass_packet
);
1300 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
1301 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
1302 thread. If GEN is set, set the general thread, if not, then set
1303 the step/continue thread. */
1305 set_thread (struct ptid ptid
, int gen
)
1307 struct remote_state
*rs
= get_remote_state ();
1308 ptid_t state
= gen
? general_thread
: continue_thread
;
1309 char *buf
= rs
->buf
;
1310 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
1312 if (ptid_equal (state
, ptid
))
1316 *buf
++ = gen
? 'g' : 'c';
1317 if (ptid_equal (ptid
, magic_null_ptid
))
1318 xsnprintf (buf
, endbuf
- buf
, "0");
1319 else if (ptid_equal (ptid
, any_thread_ptid
))
1320 xsnprintf (buf
, endbuf
- buf
, "0");
1321 else if (ptid_equal (ptid
, minus_one_ptid
))
1322 xsnprintf (buf
, endbuf
- buf
, "-1");
1324 write_ptid (buf
, endbuf
, ptid
);
1326 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1328 general_thread
= ptid
;
1330 continue_thread
= ptid
;
1334 set_general_thread (struct ptid ptid
)
1336 set_thread (ptid
, 1);
1340 set_continue_thread (struct ptid ptid
)
1342 set_thread (ptid
, 0);
1345 /* Change the remote current process. Which thread within the process
1346 ends up selected isn't important, as long as it is the same process
1347 as what INFERIOR_PTID points to.
1349 This comes from that fact that there is no explicit notion of
1350 "selected process" in the protocol. The selected process for
1351 general operations is the process the selected general thread
1355 set_general_process (void)
1357 struct remote_state
*rs
= get_remote_state ();
1359 /* If the remote can't handle multiple processes, don't bother. */
1360 if (!remote_multi_process_p (rs
))
1363 /* We only need to change the remote current thread if it's pointing
1364 at some other process. */
1365 if (ptid_get_pid (general_thread
) != ptid_get_pid (inferior_ptid
))
1366 set_general_thread (inferior_ptid
);
1370 /* Return nonzero if the thread PTID is still alive on the remote
1374 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
1376 struct remote_state
*rs
= get_remote_state ();
1377 int tid
= ptid_get_tid (ptid
);
1380 if (ptid_equal (ptid
, magic_null_ptid
))
1381 /* The main thread is always alive. */
1384 if (ptid_get_pid (ptid
) != 0 && ptid_get_tid (ptid
) == 0)
1385 /* The main thread is always alive. This can happen after a
1386 vAttach, if the remote side doesn't support
1391 endp
= rs
->buf
+ get_remote_packet_size ();
1394 write_ptid (p
, endp
, ptid
);
1397 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1398 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
1401 /* About these extended threadlist and threadinfo packets. They are
1402 variable length packets but, the fields within them are often fixed
1403 length. They are redundent enough to send over UDP as is the
1404 remote protocol in general. There is a matching unit test module
1407 #define OPAQUETHREADBYTES 8
1409 /* a 64 bit opaque identifier */
1410 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
1412 /* WARNING: This threadref data structure comes from the remote O.S.,
1413 libstub protocol encoding, and remote.c. it is not particularly
1416 /* Right now, the internal structure is int. We want it to be bigger.
1420 typedef int gdb_threadref
; /* Internal GDB thread reference. */
1422 /* gdb_ext_thread_info is an internal GDB data structure which is
1423 equivalent to the reply of the remote threadinfo packet. */
1425 struct gdb_ext_thread_info
1427 threadref threadid
; /* External form of thread reference. */
1428 int active
; /* Has state interesting to GDB?
1430 char display
[256]; /* Brief state display, name,
1431 blocked/suspended. */
1432 char shortname
[32]; /* To be used to name threads. */
1433 char more_display
[256]; /* Long info, statistics, queue depth,
1437 /* The volume of remote transfers can be limited by submitting
1438 a mask containing bits specifying the desired information.
1439 Use a union of these values as the 'selection' parameter to
1440 get_thread_info. FIXME: Make these TAG names more thread specific.
1443 #define TAG_THREADID 1
1444 #define TAG_EXISTS 2
1445 #define TAG_DISPLAY 4
1446 #define TAG_THREADNAME 8
1447 #define TAG_MOREDISPLAY 16
1449 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
1451 char *unpack_varlen_hex (char *buff
, ULONGEST
*result
);
1453 static char *unpack_nibble (char *buf
, int *val
);
1455 static char *pack_nibble (char *buf
, int nibble
);
1457 static char *pack_hex_byte (char *pkt
, int /* unsigned char */ byte
);
1459 static char *unpack_byte (char *buf
, int *value
);
1461 static char *pack_int (char *buf
, int value
);
1463 static char *unpack_int (char *buf
, int *value
);
1465 static char *unpack_string (char *src
, char *dest
, int length
);
1467 static char *pack_threadid (char *pkt
, threadref
*id
);
1469 static char *unpack_threadid (char *inbuf
, threadref
*id
);
1471 void int_to_threadref (threadref
*id
, int value
);
1473 static int threadref_to_int (threadref
*ref
);
1475 static void copy_threadref (threadref
*dest
, threadref
*src
);
1477 static int threadmatch (threadref
*dest
, threadref
*src
);
1479 static char *pack_threadinfo_request (char *pkt
, int mode
,
1482 static int remote_unpack_thread_info_response (char *pkt
,
1483 threadref
*expectedref
,
1484 struct gdb_ext_thread_info
1488 static int remote_get_threadinfo (threadref
*threadid
,
1489 int fieldset
, /*TAG mask */
1490 struct gdb_ext_thread_info
*info
);
1492 static char *pack_threadlist_request (char *pkt
, int startflag
,
1494 threadref
*nextthread
);
1496 static int parse_threadlist_response (char *pkt
,
1498 threadref
*original_echo
,
1499 threadref
*resultlist
,
1502 static int remote_get_threadlist (int startflag
,
1503 threadref
*nextthread
,
1507 threadref
*threadlist
);
1509 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
1511 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
1512 void *context
, int looplimit
);
1514 static int remote_newthread_step (threadref
*ref
, void *context
);
1517 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
1518 buffer we're allowed to write to. Returns
1519 BUF+CHARACTERS_WRITTEN. */
1522 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
1525 struct remote_state
*rs
= get_remote_state ();
1527 if (remote_multi_process_p (rs
))
1529 pid
= ptid_get_pid (ptid
);
1531 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
1533 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
1535 tid
= ptid_get_tid (ptid
);
1537 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
1539 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
1544 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
1545 passed the last parsed char. Returns null_ptid on error. */
1548 read_ptid (char *buf
, char **obuf
)
1552 ULONGEST pid
= 0, tid
= 0;
1557 /* Multi-process ptid. */
1558 pp
= unpack_varlen_hex (p
+ 1, &pid
);
1560 error (_("invalid remote ptid: %s\n"), p
);
1563 pp
= unpack_varlen_hex (p
+ 1, &tid
);
1566 return ptid_build (pid
, 0, tid
);
1569 /* No multi-process. Just a tid. */
1570 pp
= unpack_varlen_hex (p
, &tid
);
1572 /* Since the stub is not sending a process id, then default to
1573 what's in inferior_ptid, unless it's null at this point. If so,
1574 then since there's no way to know the pid of the reported
1575 threads, use the magic number. */
1576 if (ptid_equal (inferior_ptid
, null_ptid
))
1577 pid
= ptid_get_pid (magic_null_ptid
);
1579 pid
= ptid_get_pid (inferior_ptid
);
1583 return ptid_build (pid
, 0, tid
);
1586 /* Encode 64 bits in 16 chars of hex. */
1588 static const char hexchars
[] = "0123456789abcdef";
1591 ishex (int ch
, int *val
)
1593 if ((ch
>= 'a') && (ch
<= 'f'))
1595 *val
= ch
- 'a' + 10;
1598 if ((ch
>= 'A') && (ch
<= 'F'))
1600 *val
= ch
- 'A' + 10;
1603 if ((ch
>= '0') && (ch
<= '9'))
1614 if (ch
>= 'a' && ch
<= 'f')
1615 return ch
- 'a' + 10;
1616 if (ch
>= '0' && ch
<= '9')
1618 if (ch
>= 'A' && ch
<= 'F')
1619 return ch
- 'A' + 10;
1624 stub_unpack_int (char *buff
, int fieldlength
)
1631 nibble
= stubhex (*buff
++);
1635 retval
= retval
<< 4;
1641 unpack_varlen_hex (char *buff
, /* packet to parse */
1645 ULONGEST retval
= 0;
1647 while (ishex (*buff
, &nibble
))
1650 retval
= retval
<< 4;
1651 retval
|= nibble
& 0x0f;
1658 unpack_nibble (char *buf
, int *val
)
1660 *val
= fromhex (*buf
++);
1665 pack_nibble (char *buf
, int nibble
)
1667 *buf
++ = hexchars
[(nibble
& 0x0f)];
1672 pack_hex_byte (char *pkt
, int byte
)
1674 *pkt
++ = hexchars
[(byte
>> 4) & 0xf];
1675 *pkt
++ = hexchars
[(byte
& 0xf)];
1680 unpack_byte (char *buf
, int *value
)
1682 *value
= stub_unpack_int (buf
, 2);
1687 pack_int (char *buf
, int value
)
1689 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
1690 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
1691 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
1692 buf
= pack_hex_byte (buf
, (value
& 0xff));
1697 unpack_int (char *buf
, int *value
)
1699 *value
= stub_unpack_int (buf
, 8);
1703 #if 0 /* Currently unused, uncomment when needed. */
1704 static char *pack_string (char *pkt
, char *string
);
1707 pack_string (char *pkt
, char *string
)
1712 len
= strlen (string
);
1714 len
= 200; /* Bigger than most GDB packets, junk??? */
1715 pkt
= pack_hex_byte (pkt
, len
);
1719 if ((ch
== '\0') || (ch
== '#'))
1720 ch
= '*'; /* Protect encapsulation. */
1725 #endif /* 0 (unused) */
1728 unpack_string (char *src
, char *dest
, int length
)
1737 pack_threadid (char *pkt
, threadref
*id
)
1740 unsigned char *altid
;
1742 altid
= (unsigned char *) id
;
1743 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
1745 pkt
= pack_hex_byte (pkt
, *altid
++);
1751 unpack_threadid (char *inbuf
, threadref
*id
)
1754 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
1757 altref
= (char *) id
;
1759 while (inbuf
< limit
)
1761 x
= stubhex (*inbuf
++);
1762 y
= stubhex (*inbuf
++);
1763 *altref
++ = (x
<< 4) | y
;
1768 /* Externally, threadrefs are 64 bits but internally, they are still
1769 ints. This is due to a mismatch of specifications. We would like
1770 to use 64bit thread references internally. This is an adapter
1774 int_to_threadref (threadref
*id
, int value
)
1776 unsigned char *scan
;
1778 scan
= (unsigned char *) id
;
1784 *scan
++ = (value
>> 24) & 0xff;
1785 *scan
++ = (value
>> 16) & 0xff;
1786 *scan
++ = (value
>> 8) & 0xff;
1787 *scan
++ = (value
& 0xff);
1791 threadref_to_int (threadref
*ref
)
1794 unsigned char *scan
;
1800 value
= (value
<< 8) | ((*scan
++) & 0xff);
1805 copy_threadref (threadref
*dest
, threadref
*src
)
1808 unsigned char *csrc
, *cdest
;
1810 csrc
= (unsigned char *) src
;
1811 cdest
= (unsigned char *) dest
;
1818 threadmatch (threadref
*dest
, threadref
*src
)
1820 /* Things are broken right now, so just assume we got a match. */
1822 unsigned char *srcp
, *destp
;
1824 srcp
= (char *) src
;
1825 destp
= (char *) dest
;
1829 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
1836 threadid:1, # always request threadid
1843 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
1846 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
1848 *pkt
++ = 'q'; /* Info Query */
1849 *pkt
++ = 'P'; /* process or thread info */
1850 pkt
= pack_int (pkt
, mode
); /* mode */
1851 pkt
= pack_threadid (pkt
, id
); /* threadid */
1852 *pkt
= '\0'; /* terminate */
1856 /* These values tag the fields in a thread info response packet. */
1857 /* Tagging the fields allows us to request specific fields and to
1858 add more fields as time goes by. */
1860 #define TAG_THREADID 1 /* Echo the thread identifier. */
1861 #define TAG_EXISTS 2 /* Is this process defined enough to
1862 fetch registers and its stack? */
1863 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
1864 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
1865 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
1869 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
1870 struct gdb_ext_thread_info
*info
)
1872 struct remote_state
*rs
= get_remote_state ();
1876 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
1879 /* info->threadid = 0; FIXME: implement zero_threadref. */
1881 info
->display
[0] = '\0';
1882 info
->shortname
[0] = '\0';
1883 info
->more_display
[0] = '\0';
1885 /* Assume the characters indicating the packet type have been
1887 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
1888 pkt
= unpack_threadid (pkt
, &ref
);
1891 warning (_("Incomplete response to threadinfo request."));
1892 if (!threadmatch (&ref
, expectedref
))
1893 { /* This is an answer to a different request. */
1894 warning (_("ERROR RMT Thread info mismatch."));
1897 copy_threadref (&info
->threadid
, &ref
);
1899 /* Loop on tagged fields , try to bail if somthing goes wrong. */
1901 /* Packets are terminated with nulls. */
1902 while ((pkt
< limit
) && mask
&& *pkt
)
1904 pkt
= unpack_int (pkt
, &tag
); /* tag */
1905 pkt
= unpack_byte (pkt
, &length
); /* length */
1906 if (!(tag
& mask
)) /* Tags out of synch with mask. */
1908 warning (_("ERROR RMT: threadinfo tag mismatch."));
1912 if (tag
== TAG_THREADID
)
1916 warning (_("ERROR RMT: length of threadid is not 16."));
1920 pkt
= unpack_threadid (pkt
, &ref
);
1921 mask
= mask
& ~TAG_THREADID
;
1924 if (tag
== TAG_EXISTS
)
1926 info
->active
= stub_unpack_int (pkt
, length
);
1928 mask
= mask
& ~(TAG_EXISTS
);
1931 warning (_("ERROR RMT: 'exists' length too long."));
1937 if (tag
== TAG_THREADNAME
)
1939 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
1940 mask
= mask
& ~TAG_THREADNAME
;
1943 if (tag
== TAG_DISPLAY
)
1945 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
1946 mask
= mask
& ~TAG_DISPLAY
;
1949 if (tag
== TAG_MOREDISPLAY
)
1951 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
1952 mask
= mask
& ~TAG_MOREDISPLAY
;
1955 warning (_("ERROR RMT: unknown thread info tag."));
1956 break; /* Not a tag we know about. */
1962 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
1963 struct gdb_ext_thread_info
*info
)
1965 struct remote_state
*rs
= get_remote_state ();
1968 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
1970 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1972 if (rs
->buf
[0] == '\0')
1975 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
1980 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
1983 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
1984 threadref
*nextthread
)
1986 *pkt
++ = 'q'; /* info query packet */
1987 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
1988 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
1989 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
1990 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
1995 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
1998 parse_threadlist_response (char *pkt
, int result_limit
,
1999 threadref
*original_echo
, threadref
*resultlist
,
2002 struct remote_state
*rs
= get_remote_state ();
2004 int count
, resultcount
, done
;
2007 /* Assume the 'q' and 'M chars have been stripped. */
2008 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2009 /* done parse past here */
2010 pkt
= unpack_byte (pkt
, &count
); /* count field */
2011 pkt
= unpack_nibble (pkt
, &done
);
2012 /* The first threadid is the argument threadid. */
2013 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2014 while ((count
-- > 0) && (pkt
< limit
))
2016 pkt
= unpack_threadid (pkt
, resultlist
++);
2017 if (resultcount
++ >= result_limit
)
2026 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2027 int *done
, int *result_count
, threadref
*threadlist
)
2029 struct remote_state
*rs
= get_remote_state ();
2030 static threadref echo_nextthread
;
2033 /* Trancate result limit to be smaller than the packet size. */
2034 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10) >= get_remote_packet_size ())
2035 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2037 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2039 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2041 if (*rs
->buf
== '\0')
2045 parse_threadlist_response (rs
->buf
+ 2, result_limit
, &echo_nextthread
,
2048 if (!threadmatch (&echo_nextthread
, nextthread
))
2050 /* FIXME: This is a good reason to drop the packet. */
2051 /* Possably, there is a duplicate response. */
2053 retransmit immediatly - race conditions
2054 retransmit after timeout - yes
2056 wait for packet, then exit
2058 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2059 return 0; /* I choose simply exiting. */
2061 if (*result_count
<= 0)
2065 warning (_("RMT ERROR : failed to get remote thread list."));
2068 return result
; /* break; */
2070 if (*result_count
> result_limit
)
2073 warning (_("RMT ERROR: threadlist response longer than requested."));
2079 /* This is the interface between remote and threads, remotes upper
2082 /* remote_find_new_threads retrieves the thread list and for each
2083 thread in the list, looks up the thread in GDB's internal list,
2084 adding the thread if it does not already exist. This involves
2085 getting partial thread lists from the remote target so, polling the
2086 quit_flag is required. */
2089 /* About this many threadisds fit in a packet. */
2091 #define MAXTHREADLISTRESULTS 32
2094 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2097 int done
, i
, result_count
;
2101 static threadref nextthread
;
2102 static threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
2107 if (loopcount
++ > looplimit
)
2110 warning (_("Remote fetch threadlist -infinite loop-."));
2113 if (!remote_get_threadlist (startflag
, &nextthread
, MAXTHREADLISTRESULTS
,
2114 &done
, &result_count
, resultthreadlist
))
2119 /* Clear for later iterations. */
2121 /* Setup to resume next batch of thread references, set nextthread. */
2122 if (result_count
>= 1)
2123 copy_threadref (&nextthread
, &resultthreadlist
[result_count
- 1]);
2125 while (result_count
--)
2126 if (!(result
= (*stepfunction
) (&resultthreadlist
[i
++], context
)))
2133 remote_newthread_step (threadref
*ref
, void *context
)
2135 int pid
= ptid_get_pid (inferior_ptid
);
2136 ptid_t ptid
= ptid_build (pid
, 0, threadref_to_int (ref
));
2138 if (!in_thread_list (ptid
))
2140 return 1; /* continue iterator */
2143 #define CRAZY_MAX_THREADS 1000
2146 remote_current_thread (ptid_t oldpid
)
2148 struct remote_state
*rs
= get_remote_state ();
2154 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2155 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
2156 return read_ptid (&rs
->buf
[2], NULL
);
2161 /* Find new threads for info threads command.
2162 * Original version, using John Metzler's thread protocol.
2166 remote_find_new_threads (void)
2168 remote_threadlist_iterator (remote_newthread_step
, 0,
2173 * Find all threads for info threads command.
2174 * Uses new thread protocol contributed by Cisco.
2175 * Falls back and attempts to use the older method (above)
2176 * if the target doesn't respond to the new method.
2180 remote_threads_info (struct target_ops
*ops
)
2182 struct remote_state
*rs
= get_remote_state ();
2186 if (remote_desc
== 0) /* paranoia */
2187 error (_("Command can only be used when connected to the remote target."));
2189 if (use_threadinfo_query
)
2191 putpkt ("qfThreadInfo");
2192 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2194 if (bufp
[0] != '\0') /* q packet recognized */
2196 while (*bufp
++ == 'm') /* reply contains one or more TID */
2200 new_thread
= read_ptid (bufp
, &bufp
);
2201 if (!ptid_equal (new_thread
, null_ptid
))
2203 /* In non-stop mode, we assume new found threads
2204 are running until proven otherwise with a
2205 stop reply. In all-stop, we can only get
2206 here if all threads are stopped. */
2207 int running
= non_stop
? 1 : 0;
2209 remote_notice_new_inferior (new_thread
, running
);
2212 while (*bufp
++ == ','); /* comma-separated list */
2213 putpkt ("qsThreadInfo");
2214 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2221 /* Only qfThreadInfo is supported in non-stop mode. */
2225 /* Else fall back to old method based on jmetzler protocol. */
2226 use_threadinfo_query
= 0;
2227 remote_find_new_threads ();
2232 * Collect a descriptive string about the given thread.
2233 * The target may say anything it wants to about the thread
2234 * (typically info about its blocked / runnable state, name, etc.).
2235 * This string will appear in the info threads display.
2237 * Optional: targets are not required to implement this function.
2241 remote_threads_extra_info (struct thread_info
*tp
)
2243 struct remote_state
*rs
= get_remote_state ();
2247 struct gdb_ext_thread_info threadinfo
;
2248 static char display_buf
[100]; /* arbitrary... */
2249 int n
= 0; /* position in display_buf */
2251 if (remote_desc
== 0) /* paranoia */
2252 internal_error (__FILE__
, __LINE__
,
2253 _("remote_threads_extra_info"));
2255 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
2256 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_tid (tp
->ptid
) == 0))
2257 /* This is the main thread which was added by GDB. The remote
2258 server doesn't know about it. */
2261 if (use_threadextra_query
)
2264 char *endb
= rs
->buf
+ get_remote_packet_size ();
2266 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
2268 write_ptid (b
, endb
, tp
->ptid
);
2271 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2272 if (rs
->buf
[0] != 0)
2274 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
2275 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
2276 display_buf
[result
] = '\0';
2281 /* If the above query fails, fall back to the old method. */
2282 use_threadextra_query
= 0;
2283 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
2284 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
2285 int_to_threadref (&id
, ptid_get_tid (tp
->ptid
));
2286 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
2287 if (threadinfo
.active
)
2289 if (*threadinfo
.shortname
)
2290 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
2291 " Name: %s,", threadinfo
.shortname
);
2292 if (*threadinfo
.display
)
2293 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2294 " State: %s,", threadinfo
.display
);
2295 if (*threadinfo
.more_display
)
2296 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
2297 " Priority: %s", threadinfo
.more_display
);
2301 /* For purely cosmetic reasons, clear up trailing commas. */
2302 if (',' == display_buf
[n
-1])
2303 display_buf
[n
-1] = ' ';
2311 /* Restart the remote side; this is an extended protocol operation. */
2314 extended_remote_restart (void)
2316 struct remote_state
*rs
= get_remote_state ();
2318 /* Send the restart command; for reasons I don't understand the
2319 remote side really expects a number after the "R". */
2320 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
2323 remote_fileio_reset ();
2326 /* Clean up connection to a remote debugger. */
2329 remote_close (int quitting
)
2331 if (remote_desc
== NULL
)
2332 return; /* already closed */
2334 /* Make sure we leave stdin registered in the event loop, and we
2335 don't leave the async SIGINT signal handler installed. */
2336 remote_terminal_ours ();
2338 serial_close (remote_desc
);
2341 /* We don't have a connection to the remote stub anymore. Get rid
2342 of all the inferiors and their threads we were controlling. */
2343 discard_all_inferiors ();
2345 /* We're no longer interested in any of these events. */
2346 discard_pending_stop_replies (-1);
2348 if (remote_async_inferior_event_token
)
2349 delete_async_event_handler (&remote_async_inferior_event_token
);
2350 if (remote_async_get_pending_events_token
)
2351 delete_async_event_handler (&remote_async_get_pending_events_token
);
2353 generic_mourn_inferior ();
2356 /* Query the remote side for the text, data and bss offsets. */
2361 struct remote_state
*rs
= get_remote_state ();
2364 int lose
, num_segments
= 0, do_sections
, do_segments
;
2365 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
2366 struct section_offsets
*offs
;
2367 struct symfile_segment_data
*data
;
2369 if (symfile_objfile
== NULL
)
2372 putpkt ("qOffsets");
2373 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2376 if (buf
[0] == '\000')
2377 return; /* Return silently. Stub doesn't support
2381 warning (_("Remote failure reply: %s"), buf
);
2385 /* Pick up each field in turn. This used to be done with scanf, but
2386 scanf will make trouble if CORE_ADDR size doesn't match
2387 conversion directives correctly. The following code will work
2388 with any size of CORE_ADDR. */
2389 text_addr
= data_addr
= bss_addr
= 0;
2393 if (strncmp (ptr
, "Text=", 5) == 0)
2396 /* Don't use strtol, could lose on big values. */
2397 while (*ptr
&& *ptr
!= ';')
2398 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2400 if (strncmp (ptr
, ";Data=", 6) == 0)
2403 while (*ptr
&& *ptr
!= ';')
2404 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2409 if (!lose
&& strncmp (ptr
, ";Bss=", 5) == 0)
2412 while (*ptr
&& *ptr
!= ';')
2413 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
2415 if (bss_addr
!= data_addr
)
2416 warning (_("Target reported unsupported offsets: %s"), buf
);
2421 else if (strncmp (ptr
, "TextSeg=", 8) == 0)
2424 /* Don't use strtol, could lose on big values. */
2425 while (*ptr
&& *ptr
!= ';')
2426 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
2429 if (strncmp (ptr
, ";DataSeg=", 9) == 0)
2432 while (*ptr
&& *ptr
!= ';')
2433 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
2441 error (_("Malformed response to offset query, %s"), buf
);
2442 else if (*ptr
!= '\0')
2443 warning (_("Target reported unsupported offsets: %s"), buf
);
2445 offs
= ((struct section_offsets
*)
2446 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
2447 memcpy (offs
, symfile_objfile
->section_offsets
,
2448 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
2450 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
2451 do_segments
= (data
!= NULL
);
2452 do_sections
= num_segments
== 0;
2454 if (num_segments
> 0)
2456 segments
[0] = text_addr
;
2457 segments
[1] = data_addr
;
2459 /* If we have two segments, we can still try to relocate everything
2460 by assuming that the .text and .data offsets apply to the whole
2461 text and data segments. Convert the offsets given in the packet
2462 to base addresses for symfile_map_offsets_to_segments. */
2463 else if (data
&& data
->num_segments
== 2)
2465 segments
[0] = data
->segment_bases
[0] + text_addr
;
2466 segments
[1] = data
->segment_bases
[1] + data_addr
;
2469 /* If the object file has only one segment, assume that it is text
2470 rather than data; main programs with no writable data are rare,
2471 but programs with no code are useless. Of course the code might
2472 have ended up in the data segment... to detect that we would need
2473 the permissions here. */
2474 else if (data
&& data
->num_segments
== 1)
2476 segments
[0] = data
->segment_bases
[0] + text_addr
;
2479 /* There's no way to relocate by segment. */
2485 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
2486 offs
, num_segments
, segments
);
2488 if (ret
== 0 && !do_sections
)
2489 error (_("Can not handle qOffsets TextSeg response with this symbol file"));
2496 free_symfile_segment_data (data
);
2500 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
2502 /* This is a temporary kludge to force data and bss to use the same offsets
2503 because that's what nlmconv does now. The real solution requires changes
2504 to the stub and remote.c that I don't have time to do right now. */
2506 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
2507 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
2510 objfile_relocate (symfile_objfile
, offs
);
2513 /* Callback for iterate_over_threads. Set the STOP_REQUESTED flags in
2514 threads we know are stopped already. This is used during the
2515 initial remote connection in non-stop mode --- threads that are
2516 reported as already being stopped are left stopped. */
2519 set_stop_requested_callback (struct thread_info
*thread
, void *data
)
2521 /* If we have a stop reply for this thread, it must be stopped. */
2522 if (peek_stop_reply (thread
->ptid
))
2523 set_stop_requested (thread
->ptid
, 1);
2528 /* Stub for catch_exception. */
2530 struct start_remote_args
2534 /* The current target. */
2535 struct target_ops
*target
;
2537 /* Non-zero if this is an extended-remote target. */
2542 remote_start_remote (struct ui_out
*uiout
, void *opaque
)
2544 struct start_remote_args
*args
= opaque
;
2545 struct remote_state
*rs
= get_remote_state ();
2546 struct packet_config
*noack_config
;
2547 char *wait_status
= NULL
;
2549 immediate_quit
++; /* Allow user to interrupt it. */
2551 /* Ack any packet which the remote side has already sent. */
2552 serial_write (remote_desc
, "+", 1);
2554 /* The first packet we send to the target is the optional "supported
2555 packets" request. If the target can answer this, it will tell us
2556 which later probes to skip. */
2557 remote_query_supported ();
2559 /* Next, we possibly activate noack mode.
2561 If the QStartNoAckMode packet configuration is set to AUTO,
2562 enable noack mode if the stub reported a wish for it with
2565 If set to TRUE, then enable noack mode even if the stub didn't
2566 report it in qSupported. If the stub doesn't reply OK, the
2567 session ends with an error.
2569 If FALSE, then don't activate noack mode, regardless of what the
2570 stub claimed should be the default with qSupported. */
2572 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
2574 if (noack_config
->detect
== AUTO_BOOLEAN_TRUE
2575 || (noack_config
->detect
== AUTO_BOOLEAN_AUTO
2576 && noack_config
->support
== PACKET_ENABLE
))
2578 putpkt ("QStartNoAckMode");
2579 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2580 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
2584 if (args
->extended_p
)
2586 /* Tell the remote that we are using the extended protocol. */
2588 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2591 /* Next, if the target can specify a description, read it. We do
2592 this before anything involving memory or registers. */
2593 target_find_description ();
2595 /* On OSs where the list of libraries is global to all
2596 processes, we fetch them early. */
2597 if (gdbarch_has_global_solist (target_gdbarch
))
2598 solib_add (NULL
, args
->from_tty
, args
->target
, auto_solib_add
);
2602 if (!rs
->non_stop_aware
)
2603 error (_("Non-stop mode requested, but remote does not support non-stop"));
2605 putpkt ("QNonStop:1");
2606 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2608 if (strcmp (rs
->buf
, "OK") != 0)
2609 error ("Remote refused setting non-stop mode with: %s", rs
->buf
);
2611 /* Find about threads and processes the stub is already
2612 controlling. We default to adding them in the running state.
2613 The '?' query below will then tell us about which threads are
2615 remote_threads_info (args
->target
);
2617 else if (rs
->non_stop_aware
)
2619 /* Don't assume that the stub can operate in all-stop mode.
2620 Request it explicitely. */
2621 putpkt ("QNonStop:0");
2622 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2624 if (strcmp (rs
->buf
, "OK") != 0)
2625 error ("Remote refused setting all-stop mode with: %s", rs
->buf
);
2628 /* Check whether the target is running now. */
2630 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2634 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
2636 if (args
->extended_p
)
2638 /* We're connected, but not running. Drop out before we
2639 call start_remote. */
2640 target_mark_exited (args
->target
);
2644 error (_("The target is not running (try extended-remote?)"));
2648 /* Save the reply for later. */
2649 wait_status
= alloca (strlen (rs
->buf
) + 1);
2650 strcpy (wait_status
, rs
->buf
);
2653 /* Let the stub know that we want it to return the thread. */
2654 set_continue_thread (minus_one_ptid
);
2656 /* Without this, some commands which require an active target
2657 (such as kill) won't work. This variable serves (at least)
2658 double duty as both the pid of the target process (if it has
2659 such), and as a flag indicating that a target is active.
2660 These functions should be split out into seperate variables,
2661 especially since GDB will someday have a notion of debugging
2662 several processes. */
2663 inferior_ptid
= magic_null_ptid
;
2665 /* Now, if we have thread information, update inferior_ptid. */
2666 inferior_ptid
= remote_current_thread (inferior_ptid
);
2668 remote_add_inferior (ptid_get_pid (inferior_ptid
));
2670 /* Always add the main thread. */
2671 add_thread_silent (inferior_ptid
);
2673 get_offsets (); /* Get text, data & bss offsets. */
2675 /* If we could not find a description using qXfer, and we know
2676 how to do it some other way, try again. This is not
2677 supported for non-stop; it could be, but it is tricky if
2678 there are no stopped threads when we connect. */
2679 if (remote_read_description_p (args
->target
)
2680 && gdbarch_target_desc (target_gdbarch
) == NULL
)
2682 target_clear_description ();
2683 target_find_description ();
2686 /* Use the previously fetched status. */
2687 gdb_assert (wait_status
!= NULL
);
2688 strcpy (rs
->buf
, wait_status
);
2689 rs
->cached_wait_status
= 1;
2692 start_remote (args
->from_tty
); /* Initialize gdb process mechanisms. */
2696 /* In non-stop, we will either get an "OK", meaning that there
2697 are no stopped threads at this time; or, a regular stop
2698 reply. In the latter case, there may be more than one thread
2699 stopped --- we pull them all out using the vStopped
2701 if (strcmp (rs
->buf
, "OK") != 0)
2703 struct stop_reply
*stop_reply
;
2704 struct cleanup
*old_chain
;
2706 stop_reply
= stop_reply_xmalloc ();
2707 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
2709 remote_parse_stop_reply (rs
->buf
, stop_reply
);
2710 discard_cleanups (old_chain
);
2712 /* get_pending_stop_replies acks this one, and gets the rest
2714 pending_stop_reply
= stop_reply
;
2715 remote_get_pending_stop_replies ();
2717 /* Make sure that threads that were stopped remain
2719 iterate_over_threads (set_stop_requested_callback
, NULL
);
2722 if (target_can_async_p ())
2723 target_async (inferior_event_handler
, 0);
2725 if (thread_count () == 0)
2727 if (args
->extended_p
)
2729 /* We're connected, but not running. Drop out before we
2730 call start_remote. */
2731 target_mark_exited (args
->target
);
2735 error (_("The target is not running (try extended-remote?)"));
2738 if (args
->extended_p
)
2739 target_mark_running (args
->target
);
2741 /* Let the stub know that we want it to return the thread. */
2743 /* Force the stub to choose a thread. */
2744 set_general_thread (null_ptid
);
2747 inferior_ptid
= remote_current_thread (minus_one_ptid
);
2748 if (ptid_equal (inferior_ptid
, minus_one_ptid
))
2749 error (_("remote didn't report the current thread in non-stop mode"));
2751 get_offsets (); /* Get text, data & bss offsets. */
2753 /* In non-stop mode, any cached wait status will be stored in
2754 the stop reply queue. */
2755 gdb_assert (wait_status
== NULL
);
2758 /* If we connected to a live target, do some additional setup. */
2759 if (target_has_execution
)
2761 if (exec_bfd
) /* No use without an exec file. */
2762 remote_check_symbols (symfile_objfile
);
2765 /* If code is shared between processes, then breakpoints are global
2766 too; Insert them now. */
2767 if (gdbarch_has_global_solist (target_gdbarch
)
2768 && breakpoints_always_inserted_mode ())
2769 insert_breakpoints ();
2772 /* Open a connection to a remote debugger.
2773 NAME is the filename used for communication. */
2776 remote_open (char *name
, int from_tty
)
2778 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
2781 /* Open a connection to a remote debugger using the extended
2782 remote gdb protocol. NAME is the filename used for communication. */
2785 extended_remote_open (char *name
, int from_tty
)
2787 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
2790 /* Generic code for opening a connection to a remote target. */
2793 init_all_packet_configs (void)
2796 for (i
= 0; i
< PACKET_MAX
; i
++)
2797 update_packet_config (&remote_protocol_packets
[i
]);
2800 /* Symbol look-up. */
2803 remote_check_symbols (struct objfile
*objfile
)
2805 struct remote_state
*rs
= get_remote_state ();
2806 char *msg
, *reply
, *tmp
;
2807 struct minimal_symbol
*sym
;
2810 if (remote_protocol_packets
[PACKET_qSymbol
].support
== PACKET_DISABLE
)
2813 /* Make sure the remote is pointing at the right process. */
2814 set_general_process ();
2816 /* Allocate a message buffer. We can't reuse the input buffer in RS,
2817 because we need both at the same time. */
2818 msg
= alloca (get_remote_packet_size ());
2820 /* Invite target to request symbol lookups. */
2822 putpkt ("qSymbol::");
2823 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2824 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSymbol
]);
2827 while (strncmp (reply
, "qSymbol:", 8) == 0)
2830 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
2832 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
2834 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
2837 CORE_ADDR sym_addr
= SYMBOL_VALUE_ADDRESS (sym
);
2839 /* If this is a function address, return the start of code
2840 instead of any data function descriptor. */
2841 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch
,
2845 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
2846 paddr_nz (sym_addr
), &reply
[8]);
2850 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2855 static struct serial
*
2856 remote_serial_open (char *name
)
2858 static int udp_warning
= 0;
2860 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
2861 of in ser-tcp.c, because it is the remote protocol assuming that the
2862 serial connection is reliable and not the serial connection promising
2864 if (!udp_warning
&& strncmp (name
, "udp:", 4) == 0)
2867 The remote protocol may be unreliable over UDP.\n\
2868 Some events may be lost, rendering further debugging impossible."));
2872 return serial_open (name
);
2875 /* This type describes each known response to the qSupported
2877 struct protocol_feature
2879 /* The name of this protocol feature. */
2882 /* The default for this protocol feature. */
2883 enum packet_support default_support
;
2885 /* The function to call when this feature is reported, or after
2886 qSupported processing if the feature is not supported.
2887 The first argument points to this structure. The second
2888 argument indicates whether the packet requested support be
2889 enabled, disabled, or probed (or the default, if this function
2890 is being called at the end of processing and this feature was
2891 not reported). The third argument may be NULL; if not NULL, it
2892 is a NUL-terminated string taken from the packet following
2893 this feature's name and an equals sign. */
2894 void (*func
) (const struct protocol_feature
*, enum packet_support
,
2897 /* The corresponding packet for this feature. Only used if
2898 FUNC is remote_supported_packet. */
2903 remote_supported_packet (const struct protocol_feature
*feature
,
2904 enum packet_support support
,
2905 const char *argument
)
2909 warning (_("Remote qSupported response supplied an unexpected value for"
2910 " \"%s\"."), feature
->name
);
2914 if (remote_protocol_packets
[feature
->packet
].support
2915 == PACKET_SUPPORT_UNKNOWN
)
2916 remote_protocol_packets
[feature
->packet
].support
= support
;
2920 remote_packet_size (const struct protocol_feature
*feature
,
2921 enum packet_support support
, const char *value
)
2923 struct remote_state
*rs
= get_remote_state ();
2928 if (support
!= PACKET_ENABLE
)
2931 if (value
== NULL
|| *value
== '\0')
2933 warning (_("Remote target reported \"%s\" without a size."),
2939 packet_size
= strtol (value
, &value_end
, 16);
2940 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
2942 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
2943 feature
->name
, value
);
2947 if (packet_size
> MAX_REMOTE_PACKET_SIZE
)
2949 warning (_("limiting remote suggested packet size (%d bytes) to %d"),
2950 packet_size
, MAX_REMOTE_PACKET_SIZE
);
2951 packet_size
= MAX_REMOTE_PACKET_SIZE
;
2954 /* Record the new maximum packet size. */
2955 rs
->explicit_packet_size
= packet_size
;
2959 remote_multi_process_feature (const struct protocol_feature
*feature
,
2960 enum packet_support support
, const char *value
)
2962 struct remote_state
*rs
= get_remote_state ();
2963 rs
->multi_process_aware
= (support
== PACKET_ENABLE
);
2967 remote_non_stop_feature (const struct protocol_feature
*feature
,
2968 enum packet_support support
, const char *value
)
2970 struct remote_state
*rs
= get_remote_state ();
2971 rs
->non_stop_aware
= (support
== PACKET_ENABLE
);
2974 static struct protocol_feature remote_protocol_features
[] = {
2975 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
2976 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
2977 PACKET_qXfer_auxv
},
2978 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
2979 PACKET_qXfer_features
},
2980 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
2981 PACKET_qXfer_libraries
},
2982 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
2983 PACKET_qXfer_memory_map
},
2984 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
2985 PACKET_qXfer_spu_read
},
2986 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
2987 PACKET_qXfer_spu_write
},
2988 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
2989 PACKET_qXfer_osdata
},
2990 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
2991 PACKET_QPassSignals
},
2992 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
2993 PACKET_QStartNoAckMode
},
2994 { "multiprocess", PACKET_DISABLE
, remote_multi_process_feature
, -1 },
2995 { "QNonStop", PACKET_DISABLE
, remote_non_stop_feature
, -1 },
2996 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
2997 PACKET_qXfer_siginfo_read
},
2998 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
2999 PACKET_qXfer_siginfo_write
},
3003 remote_query_supported (void)
3005 struct remote_state
*rs
= get_remote_state ();
3008 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
3010 /* The packet support flags are handled differently for this packet
3011 than for most others. We treat an error, a disabled packet, and
3012 an empty response identically: any features which must be reported
3013 to be used will be automatically disabled. An empty buffer
3014 accomplishes this, since that is also the representation for a list
3015 containing no features. */
3018 if (remote_protocol_packets
[PACKET_qSupported
].support
!= PACKET_DISABLE
)
3021 putpkt ("qSupported:multiprocess+");
3023 putpkt ("qSupported");
3025 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3027 /* If an error occured, warn, but do not return - just reset the
3028 buffer to empty and go on to disable features. */
3029 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
3032 warning (_("Remote failure reply: %s"), rs
->buf
);
3037 memset (seen
, 0, sizeof (seen
));
3042 enum packet_support is_supported
;
3043 char *p
, *end
, *name_end
, *value
;
3045 /* First separate out this item from the rest of the packet. If
3046 there's another item after this, we overwrite the separator
3047 (terminated strings are much easier to work with). */
3049 end
= strchr (p
, ';');
3052 end
= p
+ strlen (p
);
3062 warning (_("empty item in \"qSupported\" response"));
3067 name_end
= strchr (p
, '=');
3070 /* This is a name=value entry. */
3071 is_supported
= PACKET_ENABLE
;
3072 value
= name_end
+ 1;
3081 is_supported
= PACKET_ENABLE
;
3085 is_supported
= PACKET_DISABLE
;
3089 is_supported
= PACKET_SUPPORT_UNKNOWN
;
3093 warning (_("unrecognized item \"%s\" in \"qSupported\" response"), p
);
3099 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3100 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
3102 const struct protocol_feature
*feature
;
3105 feature
= &remote_protocol_features
[i
];
3106 feature
->func (feature
, is_supported
, value
);
3111 /* If we increased the packet size, make sure to increase the global
3112 buffer size also. We delay this until after parsing the entire
3113 qSupported packet, because this is the same buffer we were
3115 if (rs
->buf_size
< rs
->explicit_packet_size
)
3117 rs
->buf_size
= rs
->explicit_packet_size
;
3118 rs
->buf
= xrealloc (rs
->buf
, rs
->buf_size
);
3121 /* Handle the defaults for unmentioned features. */
3122 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
3125 const struct protocol_feature
*feature
;
3127 feature
= &remote_protocol_features
[i
];
3128 feature
->func (feature
, feature
->default_support
, NULL
);
3134 remote_open_1 (char *name
, int from_tty
, struct target_ops
*target
, int extended_p
)
3136 struct remote_state
*rs
= get_remote_state ();
3139 error (_("To open a remote debug connection, you need to specify what\n"
3140 "serial device is attached to the remote system\n"
3141 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
3143 /* See FIXME above. */
3144 if (!target_async_permitted
)
3145 wait_forever_enabled_p
= 1;
3147 /* If we're connected to a running target, target_preopen will kill it.
3148 But if we're connected to a target system with no running process,
3149 then we will still be connected when it returns. Ask this question
3150 first, before target_preopen has a chance to kill anything. */
3151 if (remote_desc
!= NULL
&& !target_has_execution
)
3154 || query (_("Already connected to a remote target. Disconnect? ")))
3157 error (_("Still connected."));
3160 target_preopen (from_tty
);
3162 unpush_target (target
);
3164 /* This time without a query. If we were connected to an
3165 extended-remote target and target_preopen killed the running
3166 process, we may still be connected. If we are starting "target
3167 remote" now, the extended-remote target will not have been
3168 removed by unpush_target. */
3169 if (remote_desc
!= NULL
&& !target_has_execution
)
3172 /* Make sure we send the passed signals list the next time we resume. */
3173 xfree (last_pass_packet
);
3174 last_pass_packet
= NULL
;
3176 remote_fileio_reset ();
3177 reopen_exec_file ();
3180 remote_desc
= remote_serial_open (name
);
3182 perror_with_name (name
);
3184 if (baud_rate
!= -1)
3186 if (serial_setbaudrate (remote_desc
, baud_rate
))
3188 /* The requested speed could not be set. Error out to
3189 top level after closing remote_desc. Take care to
3190 set remote_desc to NULL to avoid closing remote_desc
3192 serial_close (remote_desc
);
3194 perror_with_name (name
);
3198 serial_raw (remote_desc
);
3200 /* If there is something sitting in the buffer we might take it as a
3201 response to a command, which would be bad. */
3202 serial_flush_input (remote_desc
);
3206 puts_filtered ("Remote debugging using ");
3207 puts_filtered (name
);
3208 puts_filtered ("\n");
3210 push_target (target
); /* Switch to using remote target now. */
3212 /* Assume that the target is not running, until we learn otherwise. */
3214 target_mark_exited (target
);
3216 /* Register extra event sources in the event loop. */
3217 remote_async_inferior_event_token
3218 = create_async_event_handler (remote_async_inferior_event_handler
,
3220 remote_async_get_pending_events_token
3221 = create_async_event_handler (remote_async_get_pending_events_handler
,
3224 /* Reset the target state; these things will be queried either by
3225 remote_query_supported or as they are needed. */
3226 init_all_packet_configs ();
3227 rs
->cached_wait_status
= 0;
3228 rs
->explicit_packet_size
= 0;
3230 rs
->multi_process_aware
= 0;
3231 rs
->extended
= extended_p
;
3232 rs
->non_stop_aware
= 0;
3233 rs
->waiting_for_stop_reply
= 0;
3235 general_thread
= not_sent_ptid
;
3236 continue_thread
= not_sent_ptid
;
3238 /* Probe for ability to use "ThreadInfo" query, as required. */
3239 use_threadinfo_query
= 1;
3240 use_threadextra_query
= 1;
3242 if (target_async_permitted
)
3244 /* With this target we start out by owning the terminal. */
3245 remote_async_terminal_ours_p
= 1;
3247 /* FIXME: cagney/1999-09-23: During the initial connection it is
3248 assumed that the target is already ready and able to respond to
3249 requests. Unfortunately remote_start_remote() eventually calls
3250 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
3251 around this. Eventually a mechanism that allows
3252 wait_for_inferior() to expect/get timeouts will be
3254 wait_forever_enabled_p
= 0;
3257 /* First delete any symbols previously loaded from shared libraries. */
3258 no_shared_libraries (NULL
, 0);
3261 init_thread_list ();
3263 /* Start the remote connection. If error() or QUIT, discard this
3264 target (we'd otherwise be in an inconsistent state) and then
3265 propogate the error on up the exception chain. This ensures that
3266 the caller doesn't stumble along blindly assuming that the
3267 function succeeded. The CLI doesn't have this problem but other
3268 UI's, such as MI do.
3270 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
3271 this function should return an error indication letting the
3272 caller restore the previous state. Unfortunately the command
3273 ``target remote'' is directly wired to this function making that
3274 impossible. On a positive note, the CLI side of this problem has
3275 been fixed - the function set_cmd_context() makes it possible for
3276 all the ``target ....'' commands to share a common callback
3277 function. See cli-dump.c. */
3279 struct gdb_exception ex
;
3280 struct start_remote_args args
;
3282 args
.from_tty
= from_tty
;
3283 args
.target
= target
;
3284 args
.extended_p
= extended_p
;
3286 ex
= catch_exception (uiout
, remote_start_remote
, &args
, RETURN_MASK_ALL
);
3289 /* Pop the partially set up target - unless something else did
3290 already before throwing the exception. */
3291 if (remote_desc
!= NULL
)
3293 if (target_async_permitted
)
3294 wait_forever_enabled_p
= 1;
3295 throw_exception (ex
);
3299 if (target_async_permitted
)
3300 wait_forever_enabled_p
= 1;
3303 /* This takes a program previously attached to and detaches it. After
3304 this is done, GDB can be used to debug some other program. We
3305 better not have left any breakpoints in the target program or it'll
3306 die when it hits one. */
3309 remote_detach_1 (char *args
, int from_tty
, int extended
)
3311 int pid
= ptid_get_pid (inferior_ptid
);
3312 struct remote_state
*rs
= get_remote_state ();
3315 error (_("Argument given to \"detach\" when remotely debugging."));
3317 if (!target_has_execution
)
3318 error (_("No process to detach from."));
3320 /* Tell the remote target to detach. */
3321 if (remote_multi_process_p (rs
))
3322 sprintf (rs
->buf
, "D;%x", pid
);
3324 strcpy (rs
->buf
, "D");
3327 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3329 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
3331 else if (rs
->buf
[0] == '\0')
3332 error (_("Remote doesn't know how to detach"));
3334 error (_("Can't detach process."));
3338 if (remote_multi_process_p (rs
))
3339 printf_filtered (_("Detached from remote %s.\n"),
3340 target_pid_to_str (pid_to_ptid (pid
)));
3344 puts_filtered (_("Detached from remote process.\n"));
3346 puts_filtered (_("Ending remote debugging.\n"));
3350 discard_pending_stop_replies (pid
);
3351 target_mourn_inferior ();
3355 remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3357 remote_detach_1 (args
, from_tty
, 0);
3361 extended_remote_detach (struct target_ops
*ops
, char *args
, int from_tty
)
3363 remote_detach_1 (args
, from_tty
, 1);
3366 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
3369 remote_disconnect (struct target_ops
*target
, char *args
, int from_tty
)
3372 error (_("Argument given to \"disconnect\" when remotely debugging."));
3374 /* Make sure we unpush even the extended remote targets; mourn
3375 won't do it. So call remote_mourn_1 directly instead of
3376 target_mourn_inferior. */
3377 remote_mourn_1 (target
);
3380 puts_filtered ("Ending remote debugging.\n");
3383 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
3384 be chatty about it. */
3387 extended_remote_attach_1 (struct target_ops
*target
, char *args
, int from_tty
)
3389 struct remote_state
*rs
= get_remote_state ();
3392 char *wait_status
= NULL
;
3393 struct inferior
*inf
;
3396 error_no_arg (_("process-id to attach"));
3399 pid
= strtol (args
, &dummy
, 0);
3400 /* Some targets don't set errno on errors, grrr! */
3401 if (pid
== 0 && args
== dummy
)
3402 error (_("Illegal process-id: %s."), args
);
3404 if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3405 error (_("This target does not support attaching to a process"));
3407 sprintf (rs
->buf
, "vAttach;%x", pid
);
3409 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3411 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vAttach
]) == PACKET_OK
)
3414 printf_unfiltered (_("Attached to %s\n"),
3415 target_pid_to_str (pid_to_ptid (pid
)));
3419 /* Save the reply for later. */
3420 wait_status
= alloca (strlen (rs
->buf
) + 1);
3421 strcpy (wait_status
, rs
->buf
);
3423 else if (strcmp (rs
->buf
, "OK") != 0)
3424 error (_("Attaching to %s failed with: %s"),
3425 target_pid_to_str (pid_to_ptid (pid
)),
3428 else if (remote_protocol_packets
[PACKET_vAttach
].support
== PACKET_DISABLE
)
3429 error (_("This target does not support attaching to a process"));
3431 error (_("Attaching to %s failed"),
3432 target_pid_to_str (pid_to_ptid (pid
)));
3434 inferior_ptid
= pid_to_ptid (pid
);
3436 /* Now, if we have thread information, update inferior_ptid. */
3437 inferior_ptid
= remote_current_thread (inferior_ptid
);
3439 inf
= remote_add_inferior (pid
);
3440 inf
->attach_flag
= 1;
3443 /* Get list of threads. */
3444 remote_threads_info (target
);
3446 /* Add the main thread to the thread list. */
3447 add_thread_silent (inferior_ptid
);
3449 /* Next, if the target can specify a description, read it. We do
3450 this before anything involving memory or registers. */
3451 target_find_description ();
3455 /* Use the previously fetched status. */
3456 gdb_assert (wait_status
!= NULL
);
3458 if (target_can_async_p ())
3460 struct stop_reply
*stop_reply
;
3461 struct cleanup
*old_chain
;
3463 stop_reply
= stop_reply_xmalloc ();
3464 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
3465 remote_parse_stop_reply (wait_status
, stop_reply
);
3466 discard_cleanups (old_chain
);
3467 push_stop_reply (stop_reply
);
3469 target_async (inferior_event_handler
, 0);
3473 gdb_assert (wait_status
!= NULL
);
3474 strcpy (rs
->buf
, wait_status
);
3475 rs
->cached_wait_status
= 1;
3479 gdb_assert (wait_status
== NULL
);
3483 extended_remote_attach (struct target_ops
*ops
, char *args
, int from_tty
)
3485 extended_remote_attach_1 (ops
, args
, from_tty
);
3488 /* Convert hex digit A to a number. */
3493 if (a
>= '0' && a
<= '9')
3495 else if (a
>= 'a' && a
<= 'f')
3496 return a
- 'a' + 10;
3497 else if (a
>= 'A' && a
<= 'F')
3498 return a
- 'A' + 10;
3500 error (_("Reply contains invalid hex digit %d"), a
);
3504 hex2bin (const char *hex
, gdb_byte
*bin
, int count
)
3508 for (i
= 0; i
< count
; i
++)
3510 if (hex
[0] == 0 || hex
[1] == 0)
3512 /* Hex string is short, or of uneven length.
3513 Return the count that has been converted so far. */
3516 *bin
++ = fromhex (hex
[0]) * 16 + fromhex (hex
[1]);
3522 /* Convert number NIB to a hex digit. */
3530 return 'a' + nib
- 10;
3534 bin2hex (const gdb_byte
*bin
, char *hex
, int count
)
3537 /* May use a length, or a nul-terminated string as input. */
3539 count
= strlen ((char *) bin
);
3541 for (i
= 0; i
< count
; i
++)
3543 *hex
++ = tohex ((*bin
>> 4) & 0xf);
3544 *hex
++ = tohex (*bin
++ & 0xf);
3550 /* Check for the availability of vCont. This function should also check
3554 remote_vcont_probe (struct remote_state
*rs
)
3558 strcpy (rs
->buf
, "vCont?");
3560 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3563 /* Make sure that the features we assume are supported. */
3564 if (strncmp (buf
, "vCont", 5) == 0)
3567 int support_s
, support_S
, support_c
, support_C
;
3573 rs
->support_vCont_t
= 0;
3574 while (p
&& *p
== ';')
3577 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3579 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3581 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3583 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3585 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
3586 rs
->support_vCont_t
= 1;
3588 p
= strchr (p
, ';');
3591 /* If s, S, c, and C are not all supported, we can't use vCont. Clearing
3592 BUF will make packet_ok disable the packet. */
3593 if (!support_s
|| !support_S
|| !support_c
|| !support_C
)
3597 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
3600 /* Resume the remote inferior by using a "vCont" packet. The thread
3601 to be resumed is PTID; STEP and SIGGNAL indicate whether the
3602 resumed thread should be single-stepped and/or signalled. If PTID
3603 equals minus_one_ptid, then all threads are resumed; the thread to
3604 be stepped and/or signalled is given in the global INFERIOR_PTID.
3605 This function returns non-zero iff it resumes the inferior.
3607 This function issues a strict subset of all possible vCont commands at the
3611 remote_vcont_resume (ptid_t ptid
, int step
, enum target_signal siggnal
)
3613 struct remote_state
*rs
= get_remote_state ();
3617 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3618 remote_vcont_probe (rs
);
3620 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_DISABLE
)
3624 endp
= rs
->buf
+ get_remote_packet_size ();
3626 /* If we could generate a wider range of packets, we'd have to worry
3627 about overflowing BUF. Should there be a generic
3628 "multi-part-packet" packet? */
3630 if (ptid_equal (ptid
, magic_null_ptid
))
3632 /* MAGIC_NULL_PTID means that we don't have any active threads,
3633 so we don't have any TID numbers the inferior will
3634 understand. Make sure to only send forms that do not specify
3636 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3637 xsnprintf (p
, endp
- p
, "vCont;S%02x", siggnal
);
3639 xsnprintf (p
, endp
- p
, "vCont;s");
3640 else if (siggnal
!= TARGET_SIGNAL_0
)
3641 xsnprintf (p
, endp
- p
, "vCont;C%02x", siggnal
);
3643 xsnprintf (p
, endp
- p
, "vCont;c");
3645 else if (ptid_equal (ptid
, minus_one_ptid
))
3647 /* Resume all threads, with preference for INFERIOR_PTID. */
3648 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3650 /* Step inferior_ptid with signal. */
3651 p
+= xsnprintf (p
, endp
- p
, "vCont;S%02x:", siggnal
);
3652 p
= write_ptid (p
, endp
, inferior_ptid
);
3653 /* And continue others. */
3654 p
+= xsnprintf (p
, endp
- p
, ";c");
3658 /* Step inferior_ptid. */
3659 p
+= xsnprintf (p
, endp
- p
, "vCont;s:");
3660 p
= write_ptid (p
, endp
, inferior_ptid
);
3661 /* And continue others. */
3662 p
+= xsnprintf (p
, endp
- p
, ";c");
3664 else if (siggnal
!= TARGET_SIGNAL_0
)
3666 /* Continue inferior_ptid with signal. */
3667 p
+= xsnprintf (p
, endp
- p
, "vCont;C%02x:", siggnal
);
3668 p
= write_ptid (p
, endp
, inferior_ptid
);
3669 /* And continue others. */
3670 p
+= xsnprintf (p
, endp
- p
, ";c");
3673 xsnprintf (p
, endp
- p
, "vCont;c");
3677 /* Scheduler locking; resume only PTID. */
3678 if (step
&& siggnal
!= TARGET_SIGNAL_0
)
3680 /* Step ptid with signal. */
3681 p
+= xsnprintf (p
, endp
- p
, "vCont;S%02x:", siggnal
);
3682 p
= write_ptid (p
, endp
, ptid
);
3687 p
+= xsnprintf (p
, endp
- p
, "vCont;s:");
3688 p
= write_ptid (p
, endp
, ptid
);
3690 else if (siggnal
!= TARGET_SIGNAL_0
)
3692 /* Continue ptid with signal. */
3693 p
+= xsnprintf (p
, endp
- p
, "vCont;C%02x:", siggnal
);
3694 p
= write_ptid (p
, endp
, ptid
);
3698 /* Continue ptid. */
3699 p
+= xsnprintf (p
, endp
- p
, "vCont;c:");
3700 p
= write_ptid (p
, endp
, ptid
);
3704 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
3709 /* In non-stop, the stub replies to vCont with "OK". The stop
3710 reply will be reported asynchronously by means of a `%Stop'
3712 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3713 if (strcmp (rs
->buf
, "OK") != 0)
3714 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
3720 /* Tell the remote machine to resume. */
3722 static enum target_signal last_sent_signal
= TARGET_SIGNAL_0
;
3724 static int last_sent_step
;
3727 remote_resume (struct target_ops
*ops
,
3728 ptid_t ptid
, int step
, enum target_signal siggnal
)
3730 struct remote_state
*rs
= get_remote_state ();
3733 last_sent_signal
= siggnal
;
3734 last_sent_step
= step
;
3736 /* Update the inferior on signals to silently pass, if they've changed. */
3737 remote_pass_signals ();
3739 /* The vCont packet doesn't need to specify threads via Hc. */
3740 if (remote_vcont_resume (ptid
, step
, siggnal
))
3743 /* All other supported resume packets do use Hc, so set the continue
3745 if (ptid_equal (ptid
, minus_one_ptid
))
3746 set_continue_thread (any_thread_ptid
);
3748 set_continue_thread (ptid
);
3751 if (execution_direction
== EXEC_REVERSE
)
3753 /* We don't pass signals to the target in reverse exec mode. */
3754 if (info_verbose
&& siggnal
!= TARGET_SIGNAL_0
)
3755 warning (" - Can't pass signal %d to target in reverse: ignored.\n",
3757 strcpy (buf
, step
? "bs" : "bc");
3759 else if (siggnal
!= TARGET_SIGNAL_0
)
3761 buf
[0] = step
? 'S' : 'C';
3762 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
3763 buf
[2] = tohex (((int) siggnal
) & 0xf);
3767 strcpy (buf
, step
? "s" : "c");
3772 /* We are about to start executing the inferior, let's register it
3773 with the event loop. NOTE: this is the one place where all the
3774 execution commands end up. We could alternatively do this in each
3775 of the execution commands in infcmd.c. */
3776 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
3777 into infcmd.c in order to allow inferior function calls to work
3778 NOT asynchronously. */
3779 if (target_can_async_p ())
3780 target_async (inferior_event_handler
, 0);
3782 /* We've just told the target to resume. The remote server will
3783 wait for the inferior to stop, and then send a stop reply. In
3784 the mean time, we can't start another command/query ourselves
3785 because the stub wouldn't be ready to process it. This applies
3786 only to the base all-stop protocol, however. In non-stop (which
3787 only supports vCont), the stub replies with an "OK", and is
3788 immediate able to process further serial input. */
3790 rs
->waiting_for_stop_reply
= 1;
3794 /* Set up the signal handler for SIGINT, while the target is
3795 executing, ovewriting the 'regular' SIGINT signal handler. */
3797 initialize_sigint_signal_handler (void)
3799 signal (SIGINT
, handle_remote_sigint
);
3802 /* Signal handler for SIGINT, while the target is executing. */
3804 handle_remote_sigint (int sig
)
3806 signal (sig
, handle_remote_sigint_twice
);
3807 mark_async_signal_handler_wrapper (sigint_remote_token
);
3810 /* Signal handler for SIGINT, installed after SIGINT has already been
3811 sent once. It will take effect the second time that the user sends
3814 handle_remote_sigint_twice (int sig
)
3816 signal (sig
, handle_remote_sigint
);
3817 mark_async_signal_handler_wrapper (sigint_remote_twice_token
);
3820 /* Perform the real interruption of the target execution, in response
3823 async_remote_interrupt (gdb_client_data arg
)
3826 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
3828 target_stop (inferior_ptid
);
3831 /* Perform interrupt, if the first attempt did not succeed. Just give
3832 up on the target alltogether. */
3834 async_remote_interrupt_twice (gdb_client_data arg
)
3837 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt_twice called\n");
3842 /* Reinstall the usual SIGINT handlers, after the target has
3845 cleanup_sigint_signal_handler (void *dummy
)
3847 signal (SIGINT
, handle_sigint
);
3850 /* Send ^C to target to halt it. Target will respond, and send us a
3852 static void (*ofunc
) (int);
3854 /* The command line interface's stop routine. This function is installed
3855 as a signal handler for SIGINT. The first time a user requests a
3856 stop, we call remote_stop to send a break or ^C. If there is no
3857 response from the target (it didn't stop when the user requested it),
3858 we ask the user if he'd like to detach from the target. */
3860 remote_interrupt (int signo
)
3862 /* If this doesn't work, try more severe steps. */
3863 signal (signo
, remote_interrupt_twice
);
3865 gdb_call_async_signal_handler (sigint_remote_token
, 1);
3868 /* The user typed ^C twice. */
3871 remote_interrupt_twice (int signo
)
3873 signal (signo
, ofunc
);
3874 gdb_call_async_signal_handler (sigint_remote_twice_token
, 1);
3875 signal (signo
, remote_interrupt
);
3878 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
3879 thread, all threads of a remote process, or all threads of all
3883 remote_stop_ns (ptid_t ptid
)
3885 struct remote_state
*rs
= get_remote_state ();
3887 char *endp
= rs
->buf
+ get_remote_packet_size ();
3888 struct stop_reply
*reply
, *next
;
3890 if (remote_protocol_packets
[PACKET_vCont
].support
== PACKET_SUPPORT_UNKNOWN
)
3891 remote_vcont_probe (rs
);
3893 if (!rs
->support_vCont_t
)
3894 error (_("Remote server does not support stopping threads"));
3896 if (ptid_equal (ptid
, minus_one_ptid
))
3897 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
3902 /* Step inferior_ptid. */
3903 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
3905 if (ptid_is_pid (ptid
))
3906 /* All (-1) threads of process. */
3907 nptid
= ptid_build (ptid_get_pid (ptid
), 0, -1);
3910 /* Small optimization: if we already have a stop reply for
3911 this thread, no use in telling the stub we want this
3913 if (peek_stop_reply (ptid
))
3919 p
= write_ptid (p
, endp
, nptid
);
3922 /* In non-stop, we get an immediate OK reply. The stop reply will
3923 come in asynchronously by notification. */
3925 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3926 if (strcmp (rs
->buf
, "OK") != 0)
3927 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
3930 /* All-stop version of target_stop. Sends a break or a ^C to stop the
3931 remote target. It is undefined which thread of which process
3932 reports the stop. */
3935 remote_stop_as (ptid_t ptid
)
3937 struct remote_state
*rs
= get_remote_state ();
3939 /* If the inferior is stopped already, but the core didn't know
3940 about it yet, just ignore the request. The cached wait status
3941 will be collected in remote_wait. */
3942 if (rs
->cached_wait_status
)
3945 /* Send a break or a ^C, depending on user preference. */
3948 serial_send_break (remote_desc
);
3950 serial_write (remote_desc
, "\003", 1);
3953 /* This is the generic stop called via the target vector. When a target
3954 interrupt is requested, either by the command line or the GUI, we
3955 will eventually end up here. */
3958 remote_stop (ptid_t ptid
)
3961 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
3964 remote_stop_ns (ptid
);
3966 remote_stop_as (ptid
);
3969 /* Ask the user what to do when an interrupt is received. */
3972 interrupt_query (void)
3974 target_terminal_ours ();
3976 if (target_can_async_p ())
3978 signal (SIGINT
, handle_sigint
);
3979 deprecated_throw_reason (RETURN_QUIT
);
3983 if (query (_("Interrupted while waiting for the program.\n\
3984 Give up (and stop debugging it)? ")))
3987 deprecated_throw_reason (RETURN_QUIT
);
3991 target_terminal_inferior ();
3994 /* Enable/disable target terminal ownership. Most targets can use
3995 terminal groups to control terminal ownership. Remote targets are
3996 different in that explicit transfer of ownership to/from GDB/target
4000 remote_terminal_inferior (void)
4002 if (!target_async_permitted
)
4003 /* Nothing to do. */
4006 /* FIXME: cagney/1999-09-27: Shouldn't need to test for
4007 sync_execution here. This function should only be called when
4008 GDB is resuming the inferior in the forground. A background
4009 resume (``run&'') should leave GDB in control of the terminal and
4010 consequently should not call this code. */
4011 if (!sync_execution
)
4013 /* FIXME: cagney/1999-09-27: Closely related to the above. Make
4014 calls target_terminal_*() idenpotent. The event-loop GDB talking
4015 to an asynchronous target with a synchronous command calls this
4016 function from both event-top.c and infrun.c/infcmd.c. Once GDB
4017 stops trying to transfer the terminal to the target when it
4018 shouldn't this guard can go away. */
4019 if (!remote_async_terminal_ours_p
)
4021 delete_file_handler (input_fd
);
4022 remote_async_terminal_ours_p
= 0;
4023 initialize_sigint_signal_handler ();
4024 /* NOTE: At this point we could also register our selves as the
4025 recipient of all input. Any characters typed could then be
4026 passed on down to the target. */
4030 remote_terminal_ours (void)
4032 if (!target_async_permitted
)
4033 /* Nothing to do. */
4036 /* See FIXME in remote_terminal_inferior. */
4037 if (!sync_execution
)
4039 /* See FIXME in remote_terminal_inferior. */
4040 if (remote_async_terminal_ours_p
)
4042 cleanup_sigint_signal_handler (NULL
);
4043 add_file_handler (input_fd
, stdin_event_handler
, 0);
4044 remote_async_terminal_ours_p
= 1;
4048 remote_console_output (char *msg
)
4052 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
4055 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
4058 fputs_unfiltered (tb
, gdb_stdtarg
);
4060 gdb_flush (gdb_stdtarg
);
4063 typedef struct cached_reg
4066 gdb_byte data
[MAX_REGISTER_SIZE
];
4069 DEF_VEC_O(cached_reg_t
);
4073 struct stop_reply
*next
;
4077 struct target_waitstatus ws
;
4079 VEC(cached_reg_t
) *regcache
;
4081 int stopped_by_watchpoint_p
;
4082 CORE_ADDR watch_data_address
;
4088 /* The list of already fetched and acknowledged stop events. */
4089 static struct stop_reply
*stop_reply_queue
;
4091 static struct stop_reply
*
4092 stop_reply_xmalloc (void)
4094 struct stop_reply
*r
= XMALLOC (struct stop_reply
);
4100 stop_reply_xfree (struct stop_reply
*r
)
4104 VEC_free (cached_reg_t
, r
->regcache
);
4109 /* Discard all pending stop replies of inferior PID. If PID is -1,
4110 discard everything. */
4113 discard_pending_stop_replies (int pid
)
4115 struct stop_reply
*prev
= NULL
, *reply
, *next
;
4117 /* Discard the in-flight notification. */
4118 if (pending_stop_reply
!= NULL
4120 || ptid_get_pid (pending_stop_reply
->ptid
) == pid
))
4122 stop_reply_xfree (pending_stop_reply
);
4123 pending_stop_reply
= NULL
;
4126 /* Discard the stop replies we have already pulled with
4128 for (reply
= stop_reply_queue
; reply
; reply
= next
)
4132 || ptid_get_pid (reply
->ptid
) == pid
)
4134 if (reply
== stop_reply_queue
)
4135 stop_reply_queue
= reply
->next
;
4137 prev
->next
= reply
->next
;
4139 stop_reply_xfree (reply
);
4146 /* Cleanup wrapper. */
4149 do_stop_reply_xfree (void *arg
)
4151 struct stop_reply
*r
= arg
;
4152 stop_reply_xfree (r
);
4155 /* Look for a queued stop reply belonging to PTID. If one is found,
4156 remove it from the queue, and return it. Returns NULL if none is
4157 found. If there are still queued events left to process, tell the
4158 event loop to get back to target_wait soon. */
4160 static struct stop_reply
*
4161 queued_stop_reply (ptid_t ptid
)
4163 struct stop_reply
*it
, *prev
;
4164 struct stop_reply head
;
4166 head
.next
= stop_reply_queue
;
4171 if (!ptid_equal (ptid
, minus_one_ptid
))
4172 for (; it
; prev
= it
, it
= it
->next
)
4173 if (ptid_equal (ptid
, it
->ptid
))
4178 prev
->next
= it
->next
;
4182 stop_reply_queue
= head
.next
;
4184 if (stop_reply_queue
)
4185 /* There's still at least an event left. */
4186 mark_async_event_handler (remote_async_inferior_event_token
);
4191 /* Push a fully parsed stop reply in the stop reply queue. Since we
4192 know that we now have at least one queued event left to pass to the
4193 core side, tell the event loop to get back to target_wait soon. */
4196 push_stop_reply (struct stop_reply
*new_event
)
4198 struct stop_reply
*event
;
4200 if (stop_reply_queue
)
4202 for (event
= stop_reply_queue
;
4203 event
&& event
->next
;
4204 event
= event
->next
)
4207 event
->next
= new_event
;
4210 stop_reply_queue
= new_event
;
4212 mark_async_event_handler (remote_async_inferior_event_token
);
4215 /* Returns true if we have a stop reply for PTID. */
4218 peek_stop_reply (ptid_t ptid
)
4220 struct stop_reply
*it
;
4222 for (it
= stop_reply_queue
; it
; it
= it
->next
)
4223 if (ptid_equal (ptid
, it
->ptid
))
4225 if (it
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
4232 /* Parse the stop reply in BUF. Either the function succeeds, and the
4233 result is stored in EVENT, or throws an error. */
4236 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
4238 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4242 event
->ptid
= null_ptid
;
4243 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
4244 event
->ws
.value
.integer
= 0;
4245 event
->solibs_changed
= 0;
4246 event
->replay_event
= 0;
4247 event
->stopped_by_watchpoint_p
= 0;
4248 event
->regcache
= NULL
;
4252 case 'T': /* Status with PC, SP, FP, ... */
4254 gdb_byte regs
[MAX_REGISTER_SIZE
];
4256 /* Expedited reply, containing Signal, {regno, reg} repeat. */
4257 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
4259 n... = register number
4260 r... = register contents
4263 p
= &buf
[3]; /* after Txx */
4271 /* If the packet contains a register number, save it in
4272 pnum and set p1 to point to the character following it.
4273 Otherwise p1 points to p. */
4275 /* If this packet is an awatch packet, don't parse the 'a'
4276 as a register number. */
4278 if (strncmp (p
, "awatch", strlen("awatch")) != 0)
4280 /* Read the ``P'' register number. */
4281 pnum
= strtol (p
, &p_temp
, 16);
4287 if (p1
== p
) /* No register number present here. */
4289 p1
= strchr (p
, ':');
4291 error (_("Malformed packet(a) (missing colon): %s\n\
4294 if (strncmp (p
, "thread", p1
- p
) == 0)
4295 event
->ptid
= read_ptid (++p1
, &p
);
4296 else if ((strncmp (p
, "watch", p1
- p
) == 0)
4297 || (strncmp (p
, "rwatch", p1
- p
) == 0)
4298 || (strncmp (p
, "awatch", p1
- p
) == 0))
4300 event
->stopped_by_watchpoint_p
= 1;
4301 p
= unpack_varlen_hex (++p1
, &addr
);
4302 event
->watch_data_address
= (CORE_ADDR
) addr
;
4304 else if (strncmp (p
, "library", p1
- p
) == 0)
4308 while (*p_temp
&& *p_temp
!= ';')
4311 event
->solibs_changed
= 1;
4314 else if (strncmp (p
, "replaylog", p1
- p
) == 0)
4316 /* NO_HISTORY event.
4317 p1 will indicate "begin" or "end", but
4318 it makes no difference for now, so ignore it. */
4319 event
->replay_event
= 1;
4320 p_temp
= strchr (p1
+ 1, ';');
4326 /* Silently skip unknown optional info. */
4327 p_temp
= strchr (p1
+ 1, ';');
4334 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
4335 cached_reg_t cached_reg
;
4340 error (_("Malformed packet(b) (missing colon): %s\n\
4346 error (_("Remote sent bad register number %s: %s\n\
4348 phex_nz (pnum
, 0), p
, buf
);
4350 cached_reg
.num
= reg
->regnum
;
4352 fieldsize
= hex2bin (p
, cached_reg
.data
,
4353 register_size (target_gdbarch
,
4356 if (fieldsize
< register_size (target_gdbarch
,
4358 warning (_("Remote reply is too short: %s"), buf
);
4360 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
4364 error (_("Remote register badly formatted: %s\nhere: %s"),
4370 case 'S': /* Old style status, just signal only. */
4371 if (event
->solibs_changed
)
4372 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
4373 else if (event
->replay_event
)
4374 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
4377 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
4378 event
->ws
.value
.sig
= (enum target_signal
)
4379 (((fromhex (buf
[1])) << 4) + (fromhex (buf
[2])));
4382 case 'W': /* Target exited. */
4389 /* GDB used to accept only 2 hex chars here. Stubs should
4390 only send more if they detect GDB supports multi-process
4392 p
= unpack_varlen_hex (&buf
[1], &value
);
4396 /* The remote process exited. */
4397 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
4398 event
->ws
.value
.integer
= value
;
4402 /* The remote process exited with a signal. */
4403 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
4404 event
->ws
.value
.sig
= (enum target_signal
) value
;
4407 /* If no process is specified, assume inferior_ptid. */
4408 pid
= ptid_get_pid (inferior_ptid
);
4417 else if (strncmp (p
,
4418 "process:", sizeof ("process:") - 1) == 0)
4421 p
+= sizeof ("process:") - 1;
4422 unpack_varlen_hex (p
, &upid
);
4426 error (_("unknown stop reply packet: %s"), buf
);
4429 error (_("unknown stop reply packet: %s"), buf
);
4430 event
->ptid
= pid_to_ptid (pid
);
4435 if (non_stop
&& ptid_equal (event
->ptid
, null_ptid
))
4436 error (_("No process or thread specified in stop reply: %s"), buf
);
4439 /* When the stub wants to tell GDB about a new stop reply, it sends a
4440 stop notification (%Stop). Those can come it at any time, hence,
4441 we have to make sure that any pending putpkt/getpkt sequence we're
4442 making is finished, before querying the stub for more events with
4443 vStopped. E.g., if we started a vStopped sequence immediatelly
4444 upon receiving the %Stop notification, something like this could
4452 1.6) <-- (registers reply to step #1.3)
4454 Obviously, the reply in step #1.6 would be unexpected to a vStopped
4457 To solve this, whenever we parse a %Stop notification sucessfully,
4458 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
4459 doing whatever we were doing:
4465 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
4466 2.5) <-- (registers reply to step #2.3)
4468 Eventualy after step #2.5, we return to the event loop, which
4469 notices there's an event on the
4470 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
4471 associated callback --- the function below. At this point, we're
4472 always safe to start a vStopped sequence. :
4475 2.7) <-- T05 thread:2
4481 remote_get_pending_stop_replies (void)
4483 struct remote_state
*rs
= get_remote_state ();
4486 if (pending_stop_reply
)
4489 putpkt ("vStopped");
4491 /* Now we can rely on it. */
4492 push_stop_reply (pending_stop_reply
);
4493 pending_stop_reply
= NULL
;
4497 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4498 if (strcmp (rs
->buf
, "OK") == 0)
4502 struct cleanup
*old_chain
;
4503 struct stop_reply
*stop_reply
= stop_reply_xmalloc ();
4505 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4506 remote_parse_stop_reply (rs
->buf
, stop_reply
);
4509 putpkt ("vStopped");
4511 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
4513 /* Now we can rely on it. */
4514 discard_cleanups (old_chain
);
4515 push_stop_reply (stop_reply
);
4518 /* We got an unknown stop reply. */
4519 do_cleanups (old_chain
);
4526 /* Called when it is decided that STOP_REPLY holds the info of the
4527 event that is to be returned to the core. This function always
4528 destroys STOP_REPLY. */
4531 process_stop_reply (struct stop_reply
*stop_reply
,
4532 struct target_waitstatus
*status
)
4536 *status
= stop_reply
->ws
;
4537 ptid
= stop_reply
->ptid
;
4539 /* If no thread/process was reported by the stub, assume the current
4541 if (ptid_equal (ptid
, null_ptid
))
4542 ptid
= inferior_ptid
;
4544 if (status
->kind
!= TARGET_WAITKIND_EXITED
4545 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4547 /* Expedited registers. */
4548 if (stop_reply
->regcache
)
4554 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
4556 regcache_raw_supply (get_thread_regcache (ptid
),
4557 reg
->num
, reg
->data
);
4558 VEC_free (cached_reg_t
, stop_reply
->regcache
);
4561 remote_stopped_by_watchpoint_p
= stop_reply
->stopped_by_watchpoint_p
;
4562 remote_watch_data_address
= stop_reply
->watch_data_address
;
4564 remote_notice_new_inferior (ptid
, 0);
4567 stop_reply_xfree (stop_reply
);
4571 /* The non-stop mode version of target_wait. */
4574 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
)
4576 struct remote_state
*rs
= get_remote_state ();
4577 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4578 ptid_t event_ptid
= null_ptid
;
4579 struct stop_reply
*stop_reply
;
4582 /* If in non-stop mode, get out of getpkt even if a
4583 notification is received. */
4585 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4592 case 'E': /* Error of some sort. */
4593 /* We're out of sync with the target now. Did it continue
4594 or not? We can't tell which thread it was in non-stop,
4595 so just ignore this. */
4596 warning (_("Remote failure reply: %s"), rs
->buf
);
4598 case 'O': /* Console output. */
4599 remote_console_output (rs
->buf
+ 1);
4602 warning (_("Invalid remote reply: %s"), rs
->buf
);
4606 /* Acknowledge a pending stop reply that may have arrived in the
4608 if (pending_stop_reply
!= NULL
)
4609 remote_get_pending_stop_replies ();
4611 /* If indeed we noticed a stop reply, we're done. */
4612 stop_reply
= queued_stop_reply (ptid
);
4613 if (stop_reply
!= NULL
)
4614 return process_stop_reply (stop_reply
, status
);
4616 /* Still no event. If we're in asynchronous mode, then just
4617 return to the event loop. */
4618 if (remote_is_async_p ())
4620 status
->kind
= TARGET_WAITKIND_IGNORE
;
4621 return minus_one_ptid
;
4624 /* Otherwise, asynchronous mode is masked, so do a blocking
4626 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
4631 /* Wait until the remote machine stops, then return, storing status in
4632 STATUS just as `wait' would. */
4635 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
)
4637 struct remote_state
*rs
= get_remote_state ();
4638 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4639 ptid_t event_ptid
= null_ptid
;
4641 int solibs_changed
= 0;
4643 struct stop_reply
*stop_reply
;
4645 status
->kind
= TARGET_WAITKIND_IGNORE
;
4646 status
->value
.integer
= 0;
4648 stop_reply
= queued_stop_reply (ptid
);
4649 if (stop_reply
!= NULL
)
4650 return process_stop_reply (stop_reply
, status
);
4652 if (rs
->cached_wait_status
)
4653 /* Use the cached wait status, but only once. */
4654 rs
->cached_wait_status
= 0;
4659 if (!target_is_async_p ())
4661 ofunc
= signal (SIGINT
, remote_interrupt
);
4662 /* If the user hit C-c before this packet, or between packets,
4663 pretend that it was hit right here. */
4667 remote_interrupt (SIGINT
);
4671 /* FIXME: cagney/1999-09-27: If we're in async mode we should
4672 _never_ wait for ever -> test on target_is_async_p().
4673 However, before we do that we need to ensure that the caller
4674 knows how to take the target into/out of async mode. */
4675 ret
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, wait_forever_enabled_p
);
4676 if (!target_is_async_p ())
4677 signal (SIGINT
, ofunc
);
4682 remote_stopped_by_watchpoint_p
= 0;
4684 /* We got something. */
4685 rs
->waiting_for_stop_reply
= 0;
4689 case 'E': /* Error of some sort. */
4690 /* We're out of sync with the target now. Did it continue or
4691 not? Not is more likely, so report a stop. */
4692 warning (_("Remote failure reply: %s"), buf
);
4693 status
->kind
= TARGET_WAITKIND_STOPPED
;
4694 status
->value
.sig
= TARGET_SIGNAL_0
;
4696 case 'F': /* File-I/O request. */
4697 remote_fileio_request (buf
);
4699 case 'T': case 'S': case 'X': case 'W':
4701 struct stop_reply
*stop_reply
;
4702 struct cleanup
*old_chain
;
4704 stop_reply
= stop_reply_xmalloc ();
4705 old_chain
= make_cleanup (do_stop_reply_xfree
, stop_reply
);
4706 remote_parse_stop_reply (buf
, stop_reply
);
4707 discard_cleanups (old_chain
);
4708 event_ptid
= process_stop_reply (stop_reply
, status
);
4711 case 'O': /* Console output. */
4712 remote_console_output (buf
+ 1);
4714 /* The target didn't really stop; keep waiting. */
4715 rs
->waiting_for_stop_reply
= 1;
4719 if (last_sent_signal
!= TARGET_SIGNAL_0
)
4721 /* Zero length reply means that we tried 'S' or 'C' and the
4722 remote system doesn't support it. */
4723 target_terminal_ours_for_output ();
4725 ("Can't send signals to this remote system. %s not sent.\n",
4726 target_signal_to_name (last_sent_signal
));
4727 last_sent_signal
= TARGET_SIGNAL_0
;
4728 target_terminal_inferior ();
4730 strcpy ((char *) buf
, last_sent_step
? "s" : "c");
4731 putpkt ((char *) buf
);
4733 /* We just told the target to resume, so a stop reply is in
4735 rs
->waiting_for_stop_reply
= 1;
4738 /* else fallthrough */
4740 warning (_("Invalid remote reply: %s"), buf
);
4742 rs
->waiting_for_stop_reply
= 1;
4746 if (status
->kind
== TARGET_WAITKIND_IGNORE
)
4747 /* Nothing interesting happened. */
4748 return minus_one_ptid
;
4749 else if (status
->kind
!= TARGET_WAITKIND_EXITED
4750 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
4752 if (!ptid_equal (event_ptid
, null_ptid
))
4753 record_currthread (event_ptid
);
4755 event_ptid
= inferior_ptid
;
4758 /* A process exit. Invalidate our notion of current thread. */
4759 record_currthread (minus_one_ptid
);
4764 /* Wait until the remote machine stops, then return, storing status in
4765 STATUS just as `wait' would. */
4768 remote_wait (struct target_ops
*ops
,
4769 ptid_t ptid
, struct target_waitstatus
*status
)
4774 event_ptid
= remote_wait_ns (ptid
, status
);
4777 /* In synchronous mode, keep waiting until the target stops. In
4778 asynchronous mode, always return to the event loop. */
4782 event_ptid
= remote_wait_as (ptid
, status
);
4784 while (status
->kind
== TARGET_WAITKIND_IGNORE
4785 && !target_can_async_p ());
4788 if (target_can_async_p ())
4790 /* If there are are events left in the queue tell the event loop
4792 if (stop_reply_queue
)
4793 mark_async_event_handler (remote_async_inferior_event_token
);
4799 /* Fetch a single register using a 'p' packet. */
4802 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
4804 struct remote_state
*rs
= get_remote_state ();
4806 char regp
[MAX_REGISTER_SIZE
];
4809 if (remote_protocol_packets
[PACKET_p
].support
== PACKET_DISABLE
)
4812 if (reg
->pnum
== -1)
4817 p
+= hexnumstr (p
, reg
->pnum
);
4819 remote_send (&rs
->buf
, &rs
->buf_size
);
4823 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
4827 case PACKET_UNKNOWN
:
4830 error (_("Could not fetch register \"%s\""),
4831 gdbarch_register_name (get_regcache_arch (regcache
), reg
->regnum
));
4834 /* If this register is unfetchable, tell the regcache. */
4837 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
4841 /* Otherwise, parse and supply the value. */
4847 error (_("fetch_register_using_p: early buf termination"));
4849 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4852 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
4856 /* Fetch the registers included in the target's 'g' packet. */
4859 send_g_packet (void)
4861 struct remote_state
*rs
= get_remote_state ();
4866 sprintf (rs
->buf
, "g");
4867 remote_send (&rs
->buf
, &rs
->buf_size
);
4869 /* We can get out of synch in various cases. If the first character
4870 in the buffer is not a hex character, assume that has happened
4871 and try to fetch another packet to read. */
4872 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
4873 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
4874 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
4875 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
4878 fprintf_unfiltered (gdb_stdlog
,
4879 "Bad register packet; fetching a new packet\n");
4880 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4883 buf_len
= strlen (rs
->buf
);
4885 /* Sanity check the received packet. */
4886 if (buf_len
% 2 != 0)
4887 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
4893 process_g_packet (struct regcache
*regcache
)
4895 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
4896 struct remote_state
*rs
= get_remote_state ();
4897 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4902 buf_len
= strlen (rs
->buf
);
4904 /* Further sanity checks, with knowledge of the architecture. */
4905 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
4906 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
4908 /* Save the size of the packet sent to us by the target. It is used
4909 as a heuristic when determining the max size of packets that the
4910 target can safely receive. */
4911 if (rsa
->actual_register_packet_size
== 0)
4912 rsa
->actual_register_packet_size
= buf_len
;
4914 /* If this is smaller than we guessed the 'g' packet would be,
4915 update our records. A 'g' reply that doesn't include a register's
4916 value implies either that the register is not available, or that
4917 the 'p' packet must be used. */
4918 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
4920 rsa
->sizeof_g_packet
= buf_len
/ 2;
4922 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4924 if (rsa
->regs
[i
].pnum
== -1)
4927 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
4928 rsa
->regs
[i
].in_g_packet
= 0;
4930 rsa
->regs
[i
].in_g_packet
= 1;
4934 regs
= alloca (rsa
->sizeof_g_packet
);
4936 /* Unimplemented registers read as all bits zero. */
4937 memset (regs
, 0, rsa
->sizeof_g_packet
);
4939 /* Reply describes registers byte by byte, each byte encoded as two
4940 hex characters. Suck them all up, then supply them to the
4941 register cacheing/storage mechanism. */
4944 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
4946 if (p
[0] == 0 || p
[1] == 0)
4947 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
4948 internal_error (__FILE__
, __LINE__
,
4949 "unexpected end of 'g' packet reply");
4951 if (p
[0] == 'x' && p
[1] == 'x')
4952 regs
[i
] = 0; /* 'x' */
4954 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
4960 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
4962 struct packet_reg
*r
= &rsa
->regs
[i
];
4965 if (r
->offset
* 2 >= strlen (rs
->buf
))
4966 /* This shouldn't happen - we adjusted in_g_packet above. */
4967 internal_error (__FILE__
, __LINE__
,
4968 "unexpected end of 'g' packet reply");
4969 else if (rs
->buf
[r
->offset
* 2] == 'x')
4971 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
4972 /* The register isn't available, mark it as such (at
4973 the same time setting the value to zero). */
4974 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
4977 regcache_raw_supply (regcache
, r
->regnum
,
4985 fetch_registers_using_g (struct regcache
*regcache
)
4988 process_g_packet (regcache
);
4992 remote_fetch_registers (struct target_ops
*ops
,
4993 struct regcache
*regcache
, int regnum
)
4995 struct remote_state
*rs
= get_remote_state ();
4996 struct remote_arch_state
*rsa
= get_remote_arch_state ();
4999 set_general_thread (inferior_ptid
);
5003 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5004 gdb_assert (reg
!= NULL
);
5006 /* If this register might be in the 'g' packet, try that first -
5007 we are likely to read more than one register. If this is the
5008 first 'g' packet, we might be overly optimistic about its
5009 contents, so fall back to 'p'. */
5010 if (reg
->in_g_packet
)
5012 fetch_registers_using_g (regcache
);
5013 if (reg
->in_g_packet
)
5017 if (fetch_register_using_p (regcache
, reg
))
5020 /* This register is not available. */
5021 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
5026 fetch_registers_using_g (regcache
);
5028 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5029 if (!rsa
->regs
[i
].in_g_packet
)
5030 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
5032 /* This register is not available. */
5033 regcache_raw_supply (regcache
, i
, NULL
);
5037 /* Prepare to store registers. Since we may send them all (using a
5038 'G' request), we have to read out the ones we don't want to change
5042 remote_prepare_to_store (struct regcache
*regcache
)
5044 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5046 gdb_byte buf
[MAX_REGISTER_SIZE
];
5048 /* Make sure the entire registers array is valid. */
5049 switch (remote_protocol_packets
[PACKET_P
].support
)
5051 case PACKET_DISABLE
:
5052 case PACKET_SUPPORT_UNKNOWN
:
5053 /* Make sure all the necessary registers are cached. */
5054 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5055 if (rsa
->regs
[i
].in_g_packet
)
5056 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
5063 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
5064 packet was not recognized. */
5067 store_register_using_P (const struct regcache
*regcache
, struct packet_reg
*reg
)
5069 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
5070 struct remote_state
*rs
= get_remote_state ();
5071 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5072 /* Try storing a single register. */
5073 char *buf
= rs
->buf
;
5074 gdb_byte regp
[MAX_REGISTER_SIZE
];
5077 if (remote_protocol_packets
[PACKET_P
].support
== PACKET_DISABLE
)
5080 if (reg
->pnum
== -1)
5083 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
5084 p
= buf
+ strlen (buf
);
5085 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
5086 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
5087 remote_send (&rs
->buf
, &rs
->buf_size
);
5089 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
5094 error (_("Could not write register \"%s\""),
5095 gdbarch_register_name (gdbarch
, reg
->regnum
));
5096 case PACKET_UNKNOWN
:
5099 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
5103 /* Store register REGNUM, or all registers if REGNUM == -1, from the
5104 contents of the register cache buffer. FIXME: ignores errors. */
5107 store_registers_using_G (const struct regcache
*regcache
)
5109 struct remote_state
*rs
= get_remote_state ();
5110 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5114 /* Extract all the registers in the regcache copying them into a
5118 regs
= alloca (rsa
->sizeof_g_packet
);
5119 memset (regs
, 0, rsa
->sizeof_g_packet
);
5120 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5122 struct packet_reg
*r
= &rsa
->regs
[i
];
5124 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
5128 /* Command describes registers byte by byte,
5129 each byte encoded as two hex characters. */
5132 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
5134 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
5135 remote_send (&rs
->buf
, &rs
->buf_size
);
5138 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
5139 of the register cache buffer. FIXME: ignores errors. */
5142 remote_store_registers (struct target_ops
*ops
,
5143 struct regcache
*regcache
, int regnum
)
5145 struct remote_state
*rs
= get_remote_state ();
5146 struct remote_arch_state
*rsa
= get_remote_arch_state ();
5149 set_general_thread (inferior_ptid
);
5153 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
5154 gdb_assert (reg
!= NULL
);
5156 /* Always prefer to store registers using the 'P' packet if
5157 possible; we often change only a small number of registers.
5158 Sometimes we change a larger number; we'd need help from a
5159 higher layer to know to use 'G'. */
5160 if (store_register_using_P (regcache
, reg
))
5163 /* For now, don't complain if we have no way to write the
5164 register. GDB loses track of unavailable registers too
5165 easily. Some day, this may be an error. We don't have
5166 any way to read the register, either... */
5167 if (!reg
->in_g_packet
)
5170 store_registers_using_G (regcache
);
5174 store_registers_using_G (regcache
);
5176 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
5177 if (!rsa
->regs
[i
].in_g_packet
)
5178 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
5179 /* See above for why we do not issue an error here. */
5184 /* Return the number of hex digits in num. */
5187 hexnumlen (ULONGEST num
)
5191 for (i
= 0; num
!= 0; i
++)
5197 /* Set BUF to the minimum number of hex digits representing NUM. */
5200 hexnumstr (char *buf
, ULONGEST num
)
5202 int len
= hexnumlen (num
);
5203 return hexnumnstr (buf
, num
, len
);
5207 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
5210 hexnumnstr (char *buf
, ULONGEST num
, int width
)
5216 for (i
= width
- 1; i
>= 0; i
--)
5218 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
5225 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
5228 remote_address_masked (CORE_ADDR addr
)
5230 int address_size
= remote_address_size
;
5231 /* If "remoteaddresssize" was not set, default to target address size. */
5233 address_size
= gdbarch_addr_bit (target_gdbarch
);
5235 if (address_size
> 0
5236 && address_size
< (sizeof (ULONGEST
) * 8))
5238 /* Only create a mask when that mask can safely be constructed
5239 in a ULONGEST variable. */
5241 mask
= (mask
<< address_size
) - 1;
5247 /* Convert BUFFER, binary data at least LEN bytes long, into escaped
5248 binary data in OUT_BUF. Set *OUT_LEN to the length of the data
5249 encoded in OUT_BUF, and return the number of bytes in OUT_BUF
5250 (which may be more than *OUT_LEN due to escape characters). The
5251 total number of bytes in the output buffer will be at most
5255 remote_escape_output (const gdb_byte
*buffer
, int len
,
5256 gdb_byte
*out_buf
, int *out_len
,
5259 int input_index
, output_index
;
5262 for (input_index
= 0; input_index
< len
; input_index
++)
5264 gdb_byte b
= buffer
[input_index
];
5266 if (b
== '$' || b
== '#' || b
== '}')
5268 /* These must be escaped. */
5269 if (output_index
+ 2 > out_maxlen
)
5271 out_buf
[output_index
++] = '}';
5272 out_buf
[output_index
++] = b
^ 0x20;
5276 if (output_index
+ 1 > out_maxlen
)
5278 out_buf
[output_index
++] = b
;
5282 *out_len
= input_index
;
5283 return output_index
;
5286 /* Convert BUFFER, escaped data LEN bytes long, into binary data
5287 in OUT_BUF. Return the number of bytes written to OUT_BUF.
5288 Raise an error if the total number of bytes exceeds OUT_MAXLEN.
5290 This function reverses remote_escape_output. It allows more
5291 escaped characters than that function does, in particular because
5292 '*' must be escaped to avoid the run-length encoding processing
5293 in reading packets. */
5296 remote_unescape_input (const gdb_byte
*buffer
, int len
,
5297 gdb_byte
*out_buf
, int out_maxlen
)
5299 int input_index
, output_index
;
5304 for (input_index
= 0; input_index
< len
; input_index
++)
5306 gdb_byte b
= buffer
[input_index
];
5308 if (output_index
+ 1 > out_maxlen
)
5310 warning (_("Received too much data from remote target;"
5311 " ignoring overflow."));
5312 return output_index
;
5317 out_buf
[output_index
++] = b
^ 0x20;
5323 out_buf
[output_index
++] = b
;
5327 error (_("Unmatched escape character in target response."));
5329 return output_index
;
5332 /* Determine whether the remote target supports binary downloading.
5333 This is accomplished by sending a no-op memory write of zero length
5334 to the target at the specified address. It does not suffice to send
5335 the whole packet, since many stubs strip the eighth bit and
5336 subsequently compute a wrong checksum, which causes real havoc with
5339 NOTE: This can still lose if the serial line is not eight-bit
5340 clean. In cases like this, the user should clear "remote
5344 check_binary_download (CORE_ADDR addr
)
5346 struct remote_state
*rs
= get_remote_state ();
5348 switch (remote_protocol_packets
[PACKET_X
].support
)
5350 case PACKET_DISABLE
:
5354 case PACKET_SUPPORT_UNKNOWN
:
5360 p
+= hexnumstr (p
, (ULONGEST
) addr
);
5362 p
+= hexnumstr (p
, (ULONGEST
) 0);
5366 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5367 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5369 if (rs
->buf
[0] == '\0')
5372 fprintf_unfiltered (gdb_stdlog
,
5373 "binary downloading NOT suppported by target\n");
5374 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
5379 fprintf_unfiltered (gdb_stdlog
,
5380 "binary downloading suppported by target\n");
5381 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
5388 /* Write memory data directly to the remote machine.
5389 This does not inform the data cache; the data cache uses this.
5390 HEADER is the starting part of the packet.
5391 MEMADDR is the address in the remote memory space.
5392 MYADDR is the address of the buffer in our space.
5393 LEN is the number of bytes.
5394 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
5395 should send data as binary ('X'), or hex-encoded ('M').
5397 The function creates packet of the form
5398 <HEADER><ADDRESS>,<LENGTH>:<DATA>
5400 where encoding of <DATA> is termined by PACKET_FORMAT.
5402 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
5405 Returns the number of bytes transferred, or 0 (setting errno) for
5406 error. Only transfer a single packet. */
5409 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
5410 const gdb_byte
*myaddr
, int len
,
5411 char packet_format
, int use_length
)
5413 struct remote_state
*rs
= get_remote_state ();
5423 if (packet_format
!= 'X' && packet_format
!= 'M')
5424 internal_error (__FILE__
, __LINE__
,
5425 "remote_write_bytes_aux: bad packet format");
5430 payload_size
= get_memory_write_packet_size ();
5432 /* The packet buffer will be large enough for the payload;
5433 get_memory_packet_size ensures this. */
5436 /* Compute the size of the actual payload by subtracting out the
5437 packet header and footer overhead: "$M<memaddr>,<len>:...#nn".
5439 payload_size
-= strlen ("$,:#NN");
5441 /* The comma won't be used. */
5443 header_length
= strlen (header
);
5444 payload_size
-= header_length
;
5445 payload_size
-= hexnumlen (memaddr
);
5447 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
5449 strcat (rs
->buf
, header
);
5450 p
= rs
->buf
+ strlen (header
);
5452 /* Compute a best guess of the number of bytes actually transfered. */
5453 if (packet_format
== 'X')
5455 /* Best guess at number of bytes that will fit. */
5456 todo
= min (len
, payload_size
);
5458 payload_size
-= hexnumlen (todo
);
5459 todo
= min (todo
, payload_size
);
5463 /* Num bytes that will fit. */
5464 todo
= min (len
, payload_size
/ 2);
5466 payload_size
-= hexnumlen (todo
);
5467 todo
= min (todo
, payload_size
/ 2);
5471 internal_error (__FILE__
, __LINE__
,
5472 _("minumum packet size too small to write data"));
5474 /* If we already need another packet, then try to align the end
5475 of this packet to a useful boundary. */
5476 if (todo
> 2 * REMOTE_ALIGN_WRITES
&& todo
< len
)
5477 todo
= ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
5479 /* Append "<memaddr>". */
5480 memaddr
= remote_address_masked (memaddr
);
5481 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5488 /* Append <len>. Retain the location/size of <len>. It may need to
5489 be adjusted once the packet body has been created. */
5491 plenlen
= hexnumstr (p
, (ULONGEST
) todo
);
5499 /* Append the packet body. */
5500 if (packet_format
== 'X')
5502 /* Binary mode. Send target system values byte by byte, in
5503 increasing byte addresses. Only escape certain critical
5505 payload_length
= remote_escape_output (myaddr
, todo
, p
, &nr_bytes
,
5508 /* If not all TODO bytes fit, then we'll need another packet. Make
5509 a second try to keep the end of the packet aligned. Don't do
5510 this if the packet is tiny. */
5511 if (nr_bytes
< todo
&& nr_bytes
> 2 * REMOTE_ALIGN_WRITES
)
5515 new_nr_bytes
= (((memaddr
+ nr_bytes
) & ~(REMOTE_ALIGN_WRITES
- 1))
5517 if (new_nr_bytes
!= nr_bytes
)
5518 payload_length
= remote_escape_output (myaddr
, new_nr_bytes
,
5523 p
+= payload_length
;
5524 if (use_length
&& nr_bytes
< todo
)
5526 /* Escape chars have filled up the buffer prematurely,
5527 and we have actually sent fewer bytes than planned.
5528 Fix-up the length field of the packet. Use the same
5529 number of characters as before. */
5530 plen
+= hexnumnstr (plen
, (ULONGEST
) nr_bytes
, plenlen
);
5531 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
5536 /* Normal mode: Send target system values byte by byte, in
5537 increasing byte addresses. Each byte is encoded as a two hex
5539 nr_bytes
= bin2hex (myaddr
, p
, todo
);
5543 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
5544 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5546 if (rs
->buf
[0] == 'E')
5548 /* There is no correspondance between what the remote protocol
5549 uses for errors and errno codes. We would like a cleaner way
5550 of representing errors (big enough to include errno codes,
5551 bfd_error codes, and others). But for now just return EIO. */
5556 /* Return NR_BYTES, not TODO, in case escape chars caused us to send
5557 fewer bytes than we'd planned. */
5561 /* Write memory data directly to the remote machine.
5562 This does not inform the data cache; the data cache uses this.
5563 MEMADDR is the address in the remote memory space.
5564 MYADDR is the address of the buffer in our space.
5565 LEN is the number of bytes.
5567 Returns number of bytes transferred, or 0 (setting errno) for
5568 error. Only transfer a single packet. */
5571 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
5573 char *packet_format
= 0;
5575 /* Check whether the target supports binary download. */
5576 check_binary_download (memaddr
);
5578 switch (remote_protocol_packets
[PACKET_X
].support
)
5581 packet_format
= "X";
5583 case PACKET_DISABLE
:
5584 packet_format
= "M";
5586 case PACKET_SUPPORT_UNKNOWN
:
5587 internal_error (__FILE__
, __LINE__
,
5588 _("remote_write_bytes: bad internal state"));
5590 internal_error (__FILE__
, __LINE__
, _("bad switch"));
5593 return remote_write_bytes_aux (packet_format
,
5594 memaddr
, myaddr
, len
, packet_format
[0], 1);
5597 /* Read memory data directly from the remote machine.
5598 This does not use the data cache; the data cache uses this.
5599 MEMADDR is the address in the remote memory space.
5600 MYADDR is the address of the buffer in our space.
5601 LEN is the number of bytes.
5603 Returns number of bytes transferred, or 0 for error. */
5605 /* NOTE: cagney/1999-10-18: This function (and its siblings in other
5606 remote targets) shouldn't attempt to read the entire buffer.
5607 Instead it should read a single packet worth of data and then
5608 return the byte size of that packet to the caller. The caller (its
5609 caller and its callers caller ;-) already contains code for
5610 handling partial reads. */
5613 remote_read_bytes (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
5615 struct remote_state
*rs
= get_remote_state ();
5616 int max_buf_size
; /* Max size of packet output buffer. */
5622 max_buf_size
= get_memory_read_packet_size ();
5623 /* The packet buffer will be large enough for the payload;
5624 get_memory_packet_size ensures this. */
5633 todo
= min (len
, max_buf_size
/ 2); /* num bytes that will fit */
5635 /* construct "m"<memaddr>","<len>" */
5636 /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */
5637 memaddr
= remote_address_masked (memaddr
);
5640 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
5642 p
+= hexnumstr (p
, (ULONGEST
) todo
);
5646 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5648 if (rs
->buf
[0] == 'E'
5649 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
5650 && rs
->buf
[3] == '\0')
5652 /* There is no correspondance between what the remote
5653 protocol uses for errors and errno codes. We would like
5654 a cleaner way of representing errors (big enough to
5655 include errno codes, bfd_error codes, and others). But
5656 for now just return EIO. */
5661 /* Reply describes memory byte by byte,
5662 each byte encoded as two hex characters. */
5665 if ((i
= hex2bin (p
, myaddr
, todo
)) < todo
)
5667 /* Reply is short. This means that we were able to read
5668 only part of what we wanted to. */
5669 return i
+ (origlen
- len
);
5679 /* Remote notification handler. */
5682 handle_notification (char *buf
, size_t length
)
5684 if (strncmp (buf
, "Stop:", 5) == 0)
5686 if (pending_stop_reply
)
5687 /* We've already parsed the in-flight stop-reply, but the stub
5688 for some reason thought we didn't, possibly due to timeout
5689 on its side. Just ignore it. */
5693 struct cleanup
*old_chain
;
5694 struct stop_reply
*reply
= stop_reply_xmalloc ();
5695 old_chain
= make_cleanup (do_stop_reply_xfree
, reply
);
5697 remote_parse_stop_reply (buf
+ 5, reply
);
5699 discard_cleanups (old_chain
);
5701 /* Be careful to only set it after parsing, since an error
5702 may be thrown then. */
5703 pending_stop_reply
= reply
;
5705 /* Notify the event loop there's a stop reply to acknowledge
5706 and that there may be more events to fetch. */
5707 mark_async_event_handler (remote_async_get_pending_events_token
);
5711 /* We ignore notifications we don't recognize, for compatibility
5712 with newer stubs. */
5717 /* Read or write LEN bytes from inferior memory at MEMADDR,
5718 transferring to or from debugger address BUFFER. Write to inferior
5719 if SHOULD_WRITE is nonzero. Returns length of data written or
5720 read; 0 for error. TARGET is unused. */
5723 remote_xfer_memory (CORE_ADDR mem_addr
, gdb_byte
*buffer
, int mem_len
,
5724 int should_write
, struct mem_attrib
*attrib
,
5725 struct target_ops
*target
)
5729 set_general_thread (inferior_ptid
);
5732 res
= remote_write_bytes (mem_addr
, buffer
, mem_len
);
5734 res
= remote_read_bytes (mem_addr
, buffer
, mem_len
);
5739 /* Sends a packet with content determined by the printf format string
5740 FORMAT and the remaining arguments, then gets the reply. Returns
5741 whether the packet was a success, a failure, or unknown. */
5743 static enum packet_result
5744 remote_send_printf (const char *format
, ...)
5746 struct remote_state
*rs
= get_remote_state ();
5747 int max_size
= get_remote_packet_size ();
5750 va_start (ap
, format
);
5753 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
5754 internal_error (__FILE__
, __LINE__
, "Too long remote packet.");
5756 if (putpkt (rs
->buf
) < 0)
5757 error (_("Communication problem with target."));
5760 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5762 return packet_check_result (rs
->buf
);
5766 restore_remote_timeout (void *p
)
5768 int value
= *(int *)p
;
5769 remote_timeout
= value
;
5772 /* Flash writing can take quite some time. We'll set
5773 effectively infinite timeout for flash operations.
5774 In future, we'll need to decide on a better approach. */
5775 static const int remote_flash_timeout
= 1000;
5778 remote_flash_erase (struct target_ops
*ops
,
5779 ULONGEST address
, LONGEST length
)
5781 int saved_remote_timeout
= remote_timeout
;
5782 enum packet_result ret
;
5784 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5785 &saved_remote_timeout
);
5786 remote_timeout
= remote_flash_timeout
;
5788 ret
= remote_send_printf ("vFlashErase:%s,%s",
5793 case PACKET_UNKNOWN
:
5794 error (_("Remote target does not support flash erase"));
5796 error (_("Error erasing flash with vFlashErase packet"));
5801 do_cleanups (back_to
);
5805 remote_flash_write (struct target_ops
*ops
,
5806 ULONGEST address
, LONGEST length
,
5807 const gdb_byte
*data
)
5809 int saved_remote_timeout
= remote_timeout
;
5811 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5812 &saved_remote_timeout
);
5814 remote_timeout
= remote_flash_timeout
;
5815 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 'X', 0);
5816 do_cleanups (back_to
);
5822 remote_flash_done (struct target_ops
*ops
)
5824 int saved_remote_timeout
= remote_timeout
;
5826 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
5827 &saved_remote_timeout
);
5829 remote_timeout
= remote_flash_timeout
;
5830 ret
= remote_send_printf ("vFlashDone");
5831 do_cleanups (back_to
);
5835 case PACKET_UNKNOWN
:
5836 error (_("Remote target does not support vFlashDone"));
5838 error (_("Error finishing flash operation"));
5845 remote_files_info (struct target_ops
*ignore
)
5847 puts_filtered ("Debugging a target over a serial line.\n");
5850 /* Stuff for dealing with the packets which are part of this protocol.
5851 See comment at top of file for details. */
5853 /* Read a single character from the remote end. */
5856 readchar (int timeout
)
5860 ch
= serial_readchar (remote_desc
, timeout
);
5865 switch ((enum serial_rc
) ch
)
5869 error (_("Remote connection closed"));
5872 perror_with_name (_("Remote communication error"));
5874 case SERIAL_TIMEOUT
:
5880 /* Send the command in *BUF to the remote machine, and read the reply
5881 into *BUF. Report an error if we get an error reply. Resize
5882 *BUF using xrealloc if necessary to hold the result, and update
5886 remote_send (char **buf
,
5890 getpkt (buf
, sizeof_buf
, 0);
5892 if ((*buf
)[0] == 'E')
5893 error (_("Remote failure reply: %s"), *buf
);
5896 /* Return a pointer to an xmalloc'ed string representing an escaped
5897 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
5898 etc. The caller is responsible for releasing the returned
5902 escape_buffer (const char *buf
, int n
)
5904 struct cleanup
*old_chain
;
5905 struct ui_file
*stb
;
5909 stb
= mem_fileopen ();
5910 old_chain
= make_cleanup_ui_file_delete (stb
);
5912 fputstrn_unfiltered (buf
, n
, 0, stb
);
5913 str
= ui_file_xstrdup (stb
, &length
);
5914 do_cleanups (old_chain
);
5918 /* Display a null-terminated packet on stdout, for debugging, using C
5922 print_packet (char *buf
)
5924 puts_filtered ("\"");
5925 fputstr_filtered (buf
, '"', gdb_stdout
);
5926 puts_filtered ("\"");
5932 return putpkt_binary (buf
, strlen (buf
));
5935 /* Send a packet to the remote machine, with error checking. The data
5936 of the packet is in BUF. The string in BUF can be at most
5937 get_remote_packet_size () - 5 to account for the $, # and checksum,
5938 and for a possible /0 if we are debugging (remote_debug) and want
5939 to print the sent packet as a string. */
5942 putpkt_binary (char *buf
, int cnt
)
5944 struct remote_state
*rs
= get_remote_state ();
5946 unsigned char csum
= 0;
5947 char *buf2
= alloca (cnt
+ 6);
5953 /* Catch cases like trying to read memory or listing threads while
5954 we're waiting for a stop reply. The remote server wouldn't be
5955 ready to handle this request, so we'd hang and timeout. We don't
5956 have to worry about this in synchronous mode, because in that
5957 case it's not possible to issue a command while the target is
5958 running. This is not a problem in non-stop mode, because in that
5959 case, the stub is always ready to process serial input. */
5960 if (!non_stop
&& target_can_async_p () && rs
->waiting_for_stop_reply
)
5961 error (_("Cannot execute this command while the target is running."));
5963 /* We're sending out a new packet. Make sure we don't look at a
5964 stale cached response. */
5965 rs
->cached_wait_status
= 0;
5967 /* Copy the packet into buffer BUF2, encapsulating it
5968 and giving it a checksum. */
5973 for (i
= 0; i
< cnt
; i
++)
5979 *p
++ = tohex ((csum
>> 4) & 0xf);
5980 *p
++ = tohex (csum
& 0xf);
5982 /* Send it over and over until we get a positive ack. */
5986 int started_error_output
= 0;
5990 struct cleanup
*old_chain
;
5994 str
= escape_buffer (buf2
, p
- buf2
);
5995 old_chain
= make_cleanup (xfree
, str
);
5996 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
5997 gdb_flush (gdb_stdlog
);
5998 do_cleanups (old_chain
);
6000 if (serial_write (remote_desc
, buf2
, p
- buf2
))
6001 perror_with_name (_("putpkt: write failed"));
6003 /* If this is a no acks version of the remote protocol, send the
6004 packet and move on. */
6008 /* Read until either a timeout occurs (-2) or '+' is read.
6009 Handle any notification that arrives in the mean time. */
6012 ch
= readchar (remote_timeout
);
6020 case SERIAL_TIMEOUT
:
6023 if (started_error_output
)
6025 putchar_unfiltered ('\n');
6026 started_error_output
= 0;
6035 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
6039 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
6040 case SERIAL_TIMEOUT
:
6044 break; /* Retransmit buffer. */
6048 fprintf_unfiltered (gdb_stdlog
,
6049 "Packet instead of Ack, ignoring it\n");
6050 /* It's probably an old response sent because an ACK
6051 was lost. Gobble up the packet and ack it so it
6052 doesn't get retransmitted when we resend this
6055 serial_write (remote_desc
, "+", 1);
6056 continue; /* Now, go look for +. */
6063 /* If we got a notification, handle it, and go back to looking
6065 /* We've found the start of a notification. Now
6066 collect the data. */
6067 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
6072 struct cleanup
*old_chain
;
6075 str
= escape_buffer (rs
->buf
, val
);
6076 old_chain
= make_cleanup (xfree
, str
);
6077 fprintf_unfiltered (gdb_stdlog
,
6078 " Notification received: %s\n",
6080 do_cleanups (old_chain
);
6082 handle_notification (rs
->buf
, val
);
6083 /* We're in sync now, rewait for the ack. */
6090 if (!started_error_output
)
6092 started_error_output
= 1;
6093 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6095 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6096 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
6105 if (!started_error_output
)
6107 started_error_output
= 1;
6108 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
6110 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
6114 break; /* Here to retransmit. */
6118 /* This is wrong. If doing a long backtrace, the user should be
6119 able to get out next time we call QUIT, without anything as
6120 violent as interrupt_query. If we want to provide a way out of
6121 here without getting to the next QUIT, it should be based on
6122 hitting ^C twice as in remote_wait. */
6133 /* Come here after finding the start of a frame when we expected an
6134 ack. Do our best to discard the rest of this packet. */
6143 c
= readchar (remote_timeout
);
6146 case SERIAL_TIMEOUT
:
6147 /* Nothing we can do. */
6150 /* Discard the two bytes of checksum and stop. */
6151 c
= readchar (remote_timeout
);
6153 c
= readchar (remote_timeout
);
6156 case '*': /* Run length encoding. */
6157 /* Discard the repeat count. */
6158 c
= readchar (remote_timeout
);
6163 /* A regular character. */
6169 /* Come here after finding the start of the frame. Collect the rest
6170 into *BUF, verifying the checksum, length, and handling run-length
6171 compression. NUL terminate the buffer. If there is not enough room,
6172 expand *BUF using xrealloc.
6174 Returns -1 on error, number of characters in buffer (ignoring the
6175 trailing NULL) on success. (could be extended to return one of the
6176 SERIAL status indications). */
6179 read_frame (char **buf_p
,
6186 struct remote_state
*rs
= get_remote_state ();
6193 c
= readchar (remote_timeout
);
6196 case SERIAL_TIMEOUT
:
6198 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
6202 fputs_filtered ("Saw new packet start in middle of old one\n",
6204 return -1; /* Start a new packet, count retries. */
6207 unsigned char pktcsum
;
6213 check_0
= readchar (remote_timeout
);
6215 check_1
= readchar (remote_timeout
);
6217 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
6220 fputs_filtered ("Timeout in checksum, retrying\n",
6224 else if (check_0
< 0 || check_1
< 0)
6227 fputs_filtered ("Communication error in checksum\n",
6232 /* Don't recompute the checksum; with no ack packets we
6233 don't have any way to indicate a packet retransmission
6238 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
6239 if (csum
== pktcsum
)
6244 struct cleanup
*old_chain
;
6247 str
= escape_buffer (buf
, bc
);
6248 old_chain
= make_cleanup (xfree
, str
);
6249 fprintf_unfiltered (gdb_stdlog
,
6251 Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
6252 pktcsum
, csum
, str
);
6253 do_cleanups (old_chain
);
6255 /* Number of characters in buffer ignoring trailing
6259 case '*': /* Run length encoding. */
6264 c
= readchar (remote_timeout
);
6266 repeat
= c
- ' ' + 3; /* Compute repeat count. */
6268 /* The character before ``*'' is repeated. */
6270 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
6272 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
6274 /* Make some more room in the buffer. */
6275 *sizeof_buf
+= repeat
;
6276 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6280 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
6286 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
6290 if (bc
>= *sizeof_buf
- 1)
6292 /* Make some more room in the buffer. */
6294 *buf_p
= xrealloc (*buf_p
, *sizeof_buf
);
6305 /* Read a packet from the remote machine, with error checking, and
6306 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6307 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6308 rather than timing out; this is used (in synchronous mode) to wait
6309 for a target that is is executing user code to stop. */
6310 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
6311 don't have to change all the calls to getpkt to deal with the
6312 return value, because at the moment I don't know what the right
6313 thing to do it for those. */
6321 timed_out
= getpkt_sane (buf
, sizeof_buf
, forever
);
6325 /* Read a packet from the remote machine, with error checking, and
6326 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
6327 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
6328 rather than timing out; this is used (in synchronous mode) to wait
6329 for a target that is is executing user code to stop. If FOREVER ==
6330 0, this function is allowed to time out gracefully and return an
6331 indication of this to the caller. Otherwise return the number of
6332 bytes read. If EXPECTING_NOTIF, consider receiving a notification
6333 enough reason to return to the caller. */
6336 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
6337 int expecting_notif
)
6339 struct remote_state
*rs
= get_remote_state ();
6345 /* We're reading a new response. Make sure we don't look at a
6346 previously cached response. */
6347 rs
->cached_wait_status
= 0;
6349 strcpy (*buf
, "timeout");
6352 timeout
= watchdog
> 0 ? watchdog
: -1;
6353 else if (expecting_notif
)
6354 timeout
= 0; /* There should already be a char in the buffer. If
6357 timeout
= remote_timeout
;
6361 /* Process any number of notifications, and then return when
6365 /* If we get a timeout or bad checksm, retry up to MAX_TRIES
6367 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
6369 /* This can loop forever if the remote side sends us
6370 characters continuously, but if it pauses, we'll get
6371 SERIAL_TIMEOUT from readchar because of timeout. Then
6372 we'll count that as a retry.
6374 Note that even when forever is set, we will only wait
6375 forever prior to the start of a packet. After that, we
6376 expect characters to arrive at a brisk pace. They should
6377 show up within remote_timeout intervals. */
6379 c
= readchar (timeout
);
6380 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
6382 if (c
== SERIAL_TIMEOUT
)
6384 if (expecting_notif
)
6385 return -1; /* Don't complain, it's normal to not get
6386 anything in this case. */
6388 if (forever
) /* Watchdog went off? Kill the target. */
6392 error (_("Watchdog timeout has expired. Target detached."));
6395 fputs_filtered ("Timed out.\n", gdb_stdlog
);
6399 /* We've found the start of a packet or notification.
6400 Now collect the data. */
6401 val
= read_frame (buf
, sizeof_buf
);
6406 serial_write (remote_desc
, "-", 1);
6409 if (tries
> MAX_TRIES
)
6411 /* We have tried hard enough, and just can't receive the
6412 packet/notification. Give up. */
6413 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
6415 /* Skip the ack char if we're in no-ack mode. */
6416 if (!rs
->noack_mode
)
6417 serial_write (remote_desc
, "+", 1);
6421 /* If we got an ordinary packet, return that to our caller. */
6426 struct cleanup
*old_chain
;
6429 str
= escape_buffer (*buf
, val
);
6430 old_chain
= make_cleanup (xfree
, str
);
6431 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
6432 do_cleanups (old_chain
);
6435 /* Skip the ack char if we're in no-ack mode. */
6436 if (!rs
->noack_mode
)
6437 serial_write (remote_desc
, "+", 1);
6441 /* If we got a notification, handle it, and go back to looking
6445 gdb_assert (c
== '%');
6449 struct cleanup
*old_chain
;
6452 str
= escape_buffer (*buf
, val
);
6453 old_chain
= make_cleanup (xfree
, str
);
6454 fprintf_unfiltered (gdb_stdlog
,
6455 " Notification received: %s\n",
6457 do_cleanups (old_chain
);
6460 handle_notification (*buf
, val
);
6462 /* Notifications require no acknowledgement. */
6464 if (expecting_notif
)
6471 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
6473 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0);
6477 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
)
6479 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1);
6486 /* Use catch_errors so the user can quit from gdb even when we
6487 aren't on speaking terms with the remote system. */
6488 catch_errors ((catch_errors_ftype
*) putpkt
, "k", "", RETURN_MASK_ERROR
);
6490 /* Don't wait for it to die. I'm not really sure it matters whether
6491 we do or not. For the existing stubs, kill is a noop. */
6492 target_mourn_inferior ();
6496 remote_vkill (int pid
, struct remote_state
*rs
)
6498 if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6501 /* Tell the remote target to detach. */
6502 sprintf (rs
->buf
, "vKill;%x", pid
);
6504 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6506 if (packet_ok (rs
->buf
,
6507 &remote_protocol_packets
[PACKET_vKill
]) == PACKET_OK
)
6509 else if (remote_protocol_packets
[PACKET_vKill
].support
== PACKET_DISABLE
)
6516 extended_remote_kill (void)
6519 int pid
= ptid_get_pid (inferior_ptid
);
6520 struct remote_state
*rs
= get_remote_state ();
6522 res
= remote_vkill (pid
, rs
);
6523 if (res
== -1 && !remote_multi_process_p (rs
))
6525 /* Don't try 'k' on a multi-process aware stub -- it has no way
6526 to specify the pid. */
6530 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6531 if (rs
->buf
[0] != 'O' || rs
->buf
[0] != 'K')
6534 /* Don't wait for it to die. I'm not really sure it matters whether
6535 we do or not. For the existing stubs, kill is a noop. */
6541 error (_("Can't kill process"));
6543 target_mourn_inferior ();
6547 remote_mourn (struct target_ops
*ops
)
6549 remote_mourn_1 (ops
);
6552 /* Worker function for remote_mourn. */
6554 remote_mourn_1 (struct target_ops
*target
)
6556 unpush_target (target
);
6558 /* remote_close takes care of cleaning up. */
6562 select_new_thread_callback (struct thread_info
*th
, void* data
)
6564 if (!is_exited (th
->ptid
))
6566 switch_to_thread (th
->ptid
);
6567 printf_filtered (_("[Switching to %s]\n"),
6568 target_pid_to_str (inferior_ptid
));
6575 extended_remote_mourn_1 (struct target_ops
*target
)
6577 struct remote_state
*rs
= get_remote_state ();
6579 /* In case we got here due to an error, but we're going to stay
6581 rs
->waiting_for_stop_reply
= 0;
6583 /* We're no longer interested in these events. */
6584 discard_pending_stop_replies (ptid_get_pid (inferior_ptid
));
6586 /* If the current general thread belonged to the process we just
6587 detached from or has exited, the remote side current general
6588 thread becomes undefined. Considering a case like this:
6590 - We just got here due to a detach.
6591 - The process that we're detaching from happens to immediately
6592 report a global breakpoint being hit in non-stop mode, in the
6593 same thread we had selected before.
6594 - GDB attaches to this process again.
6595 - This event happens to be the next event we handle.
6597 GDB would consider that the current general thread didn't need to
6598 be set on the stub side (with Hg), since for all it knew,
6599 GENERAL_THREAD hadn't changed.
6601 Notice that although in all-stop mode, the remote server always
6602 sets the current thread to the thread reporting the stop event,
6603 that doesn't happen in non-stop mode; in non-stop, the stub *must
6604 not* change the current thread when reporting a breakpoint hit,
6605 due to the decoupling of event reporting and event handling.
6607 To keep things simple, we always invalidate our notion of the
6609 record_currthread (minus_one_ptid
);
6611 /* Unlike "target remote", we do not want to unpush the target; then
6612 the next time the user says "run", we won't be connected. */
6614 /* Call common code to mark the inferior as not running. */
6615 generic_mourn_inferior ();
6617 if (have_inferiors ())
6619 extern void nullify_last_target_wait_ptid ();
6620 /* Multi-process case. The current process has exited, but
6621 there are other processes to debug. Switch to the first
6623 iterate_over_threads (select_new_thread_callback
, NULL
);
6624 nullify_last_target_wait_ptid ();
6628 if (!remote_multi_process_p (rs
))
6630 /* Check whether the target is running now - some remote stubs
6631 automatically restart after kill. */
6633 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6635 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
6637 /* Assume that the target has been restarted. Set inferior_ptid
6638 so that bits of core GDB realizes there's something here, e.g.,
6639 so that the user can say "kill" again. */
6640 inferior_ptid
= magic_null_ptid
;
6644 /* Mark this (still pushed) target as not executable until we
6646 target_mark_exited (target
);
6650 /* Always remove execution if this was the last process. */
6651 target_mark_exited (target
);
6656 extended_remote_mourn (struct target_ops
*ops
)
6658 extended_remote_mourn_1 (ops
);
6662 extended_remote_run (char *args
)
6664 struct remote_state
*rs
= get_remote_state ();
6668 /* If the user has disabled vRun support, or we have detected that
6669 support is not available, do not try it. */
6670 if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6673 strcpy (rs
->buf
, "vRun;");
6674 len
= strlen (rs
->buf
);
6676 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
6677 error (_("Remote file name too long for run packet"));
6678 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
, 0);
6680 gdb_assert (args
!= NULL
);
6683 struct cleanup
*back_to
;
6687 argv
= gdb_buildargv (args
);
6688 back_to
= make_cleanup ((void (*) (void *)) freeargv
, argv
);
6689 for (i
= 0; argv
[i
] != NULL
; i
++)
6691 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
6692 error (_("Argument list too long for run packet"));
6693 rs
->buf
[len
++] = ';';
6694 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
, 0);
6696 do_cleanups (back_to
);
6699 rs
->buf
[len
++] = '\0';
6702 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6704 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]) == PACKET_OK
)
6706 /* We have a wait response; we don't need it, though. All is well. */
6709 else if (remote_protocol_packets
[PACKET_vRun
].support
== PACKET_DISABLE
)
6710 /* It wasn't disabled before, but it is now. */
6714 if (remote_exec_file
[0] == '\0')
6715 error (_("Running the default executable on the remote target failed; "
6716 "try \"set remote exec-file\"?"));
6718 error (_("Running \"%s\" on the remote target failed"),
6723 /* In the extended protocol we want to be able to do things like
6724 "run" and have them basically work as expected. So we need
6725 a special create_inferior function. We support changing the
6726 executable file and the command line arguments, but not the
6730 extended_remote_create_inferior_1 (char *exec_file
, char *args
,
6731 char **env
, int from_tty
)
6733 /* If running asynchronously, register the target file descriptor
6734 with the event loop. */
6735 if (target_can_async_p ())
6736 target_async (inferior_event_handler
, 0);
6738 /* Now restart the remote server. */
6739 if (extended_remote_run (args
) == -1)
6741 /* vRun was not supported. Fail if we need it to do what the
6743 if (remote_exec_file
[0])
6744 error (_("Remote target does not support \"set remote exec-file\""));
6746 error (_("Remote target does not support \"set args\" or run <ARGS>"));
6748 /* Fall back to "R". */
6749 extended_remote_restart ();
6752 /* Clean up from the last time we ran, before we mark the target
6753 running again. This will mark breakpoints uninserted, and
6754 get_offsets may insert breakpoints. */
6755 init_thread_list ();
6756 init_wait_for_inferior ();
6758 /* Now mark the inferior as running before we do anything else. */
6759 inferior_ptid
= magic_null_ptid
;
6761 /* Now, if we have thread information, update inferior_ptid. */
6762 inferior_ptid
= remote_current_thread (inferior_ptid
);
6764 remote_add_inferior (ptid_get_pid (inferior_ptid
));
6765 add_thread_silent (inferior_ptid
);
6767 /* Get updated offsets, if the stub uses qOffsets. */
6772 extended_remote_create_inferior (struct target_ops
*ops
,
6773 char *exec_file
, char *args
,
6774 char **env
, int from_tty
)
6776 extended_remote_create_inferior_1 (exec_file
, args
, env
, from_tty
);
6780 /* Insert a breakpoint. On targets that have software breakpoint
6781 support, we ask the remote target to do the work; on targets
6782 which don't, we insert a traditional memory breakpoint. */
6785 remote_insert_breakpoint (struct bp_target_info
*bp_tgt
)
6787 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
6788 If it succeeds, then set the support to PACKET_ENABLE. If it
6789 fails, and the user has explicitly requested the Z support then
6790 report an error, otherwise, mark it disabled and go on. */
6792 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6794 CORE_ADDR addr
= bp_tgt
->placed_address
;
6795 struct remote_state
*rs
;
6799 gdbarch_breakpoint_from_pc (target_gdbarch
, &addr
, &bpsize
);
6801 rs
= get_remote_state ();
6807 addr
= (ULONGEST
) remote_address_masked (addr
);
6808 p
+= hexnumstr (p
, addr
);
6809 sprintf (p
, ",%d", bpsize
);
6812 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6814 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
6819 bp_tgt
->placed_address
= addr
;
6820 bp_tgt
->placed_size
= bpsize
;
6822 case PACKET_UNKNOWN
:
6827 return memory_insert_breakpoint (bp_tgt
);
6831 remote_remove_breakpoint (struct bp_target_info
*bp_tgt
)
6833 CORE_ADDR addr
= bp_tgt
->placed_address
;
6834 struct remote_state
*rs
= get_remote_state ();
6837 if (remote_protocol_packets
[PACKET_Z0
].support
!= PACKET_DISABLE
)
6845 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
6846 p
+= hexnumstr (p
, addr
);
6847 sprintf (p
, ",%d", bp_tgt
->placed_size
);
6850 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6852 return (rs
->buf
[0] == 'E');
6855 return memory_remove_breakpoint (bp_tgt
);
6859 watchpoint_to_Z_packet (int type
)
6864 return Z_PACKET_WRITE_WP
;
6867 return Z_PACKET_READ_WP
;
6870 return Z_PACKET_ACCESS_WP
;
6873 internal_error (__FILE__
, __LINE__
,
6874 _("hw_bp_to_z: bad watchpoint type %d"), type
);
6879 remote_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
6881 struct remote_state
*rs
= get_remote_state ();
6883 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6885 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6888 sprintf (rs
->buf
, "Z%x,", packet
);
6889 p
= strchr (rs
->buf
, '\0');
6890 addr
= remote_address_masked (addr
);
6891 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6892 sprintf (p
, ",%x", len
);
6895 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6897 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6900 case PACKET_UNKNOWN
:
6905 internal_error (__FILE__
, __LINE__
,
6906 _("remote_insert_watchpoint: reached end of function"));
6911 remote_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
6913 struct remote_state
*rs
= get_remote_state ();
6915 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
6917 if (remote_protocol_packets
[PACKET_Z0
+ packet
].support
== PACKET_DISABLE
)
6920 sprintf (rs
->buf
, "z%x,", packet
);
6921 p
= strchr (rs
->buf
, '\0');
6922 addr
= remote_address_masked (addr
);
6923 p
+= hexnumstr (p
, (ULONGEST
) addr
);
6924 sprintf (p
, ",%x", len
);
6926 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6928 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
6931 case PACKET_UNKNOWN
:
6936 internal_error (__FILE__
, __LINE__
,
6937 _("remote_remove_watchpoint: reached end of function"));
6941 int remote_hw_watchpoint_limit
= -1;
6942 int remote_hw_breakpoint_limit
= -1;
6945 remote_check_watch_resources (int type
, int cnt
, int ot
)
6947 if (type
== bp_hardware_breakpoint
)
6949 if (remote_hw_breakpoint_limit
== 0)
6951 else if (remote_hw_breakpoint_limit
< 0)
6953 else if (cnt
<= remote_hw_breakpoint_limit
)
6958 if (remote_hw_watchpoint_limit
== 0)
6960 else if (remote_hw_watchpoint_limit
< 0)
6964 else if (cnt
<= remote_hw_watchpoint_limit
)
6971 remote_stopped_by_watchpoint (void)
6973 return remote_stopped_by_watchpoint_p
;
6977 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
6980 if (remote_stopped_by_watchpoint ())
6982 *addr_p
= remote_watch_data_address
;
6991 remote_insert_hw_breakpoint (struct bp_target_info
*bp_tgt
)
6994 struct remote_state
*rs
;
6997 /* The length field should be set to the size of a breakpoint
6998 instruction, even though we aren't inserting one ourselves. */
7000 gdbarch_breakpoint_from_pc
7001 (target_gdbarch
, &bp_tgt
->placed_address
, &bp_tgt
->placed_size
);
7003 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7006 rs
= get_remote_state ();
7013 addr
= remote_address_masked (bp_tgt
->placed_address
);
7014 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7015 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7018 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7020 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7023 case PACKET_UNKNOWN
:
7028 internal_error (__FILE__
, __LINE__
,
7029 _("remote_insert_hw_breakpoint: reached end of function"));
7034 remote_remove_hw_breakpoint (struct bp_target_info
*bp_tgt
)
7037 struct remote_state
*rs
= get_remote_state ();
7040 if (remote_protocol_packets
[PACKET_Z1
].support
== PACKET_DISABLE
)
7047 addr
= remote_address_masked (bp_tgt
->placed_address
);
7048 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7049 sprintf (p
, ",%x", bp_tgt
->placed_size
);
7052 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7054 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
7057 case PACKET_UNKNOWN
:
7062 internal_error (__FILE__
, __LINE__
,
7063 _("remote_remove_hw_breakpoint: reached end of function"));
7066 /* Table used by the crc32 function to calcuate the checksum. */
7068 static unsigned long crc32_table
[256] =
7071 static unsigned long
7072 crc32 (unsigned char *buf
, int len
, unsigned int crc
)
7074 if (!crc32_table
[1])
7076 /* Initialize the CRC table and the decoding table. */
7080 for (i
= 0; i
< 256; i
++)
7082 for (c
= i
<< 24, j
= 8; j
> 0; --j
)
7083 c
= c
& 0x80000000 ? (c
<< 1) ^ 0x04c11db7 : (c
<< 1);
7090 crc
= (crc
<< 8) ^ crc32_table
[((crc
>> 24) ^ *buf
) & 255];
7096 /* compare-sections command
7098 With no arguments, compares each loadable section in the exec bfd
7099 with the same memory range on the target, and reports mismatches.
7100 Useful for verifying the image on the target against the exec file.
7101 Depends on the target understanding the new "qCRC:" request. */
7103 /* FIXME: cagney/1999-10-26: This command should be broken down into a
7104 target method (target verify memory) and generic version of the
7105 actual command. This will allow other high-level code (especially
7106 generic_load()) to make use of this target functionality. */
7109 compare_sections_command (char *args
, int from_tty
)
7111 struct remote_state
*rs
= get_remote_state ();
7113 unsigned long host_crc
, target_crc
;
7114 extern bfd
*exec_bfd
;
7115 struct cleanup
*old_chain
;
7118 const char *sectname
;
7125 error (_("command cannot be used without an exec file"));
7126 if (!current_target
.to_shortname
||
7127 strcmp (current_target
.to_shortname
, "remote") != 0)
7128 error (_("command can only be used with remote target"));
7130 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
7132 if (!(s
->flags
& SEC_LOAD
))
7133 continue; /* skip non-loadable section */
7135 size
= bfd_get_section_size (s
);
7137 continue; /* skip zero-length section */
7139 sectname
= bfd_get_section_name (exec_bfd
, s
);
7140 if (args
&& strcmp (args
, sectname
) != 0)
7141 continue; /* not the section selected by user */
7143 matched
= 1; /* do this section */
7145 /* FIXME: assumes lma can fit into long. */
7146 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
7147 (long) lma
, (long) size
);
7150 /* Be clever; compute the host_crc before waiting for target
7152 sectdata
= xmalloc (size
);
7153 old_chain
= make_cleanup (xfree
, sectdata
);
7154 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
7155 host_crc
= crc32 ((unsigned char *) sectdata
, size
, 0xffffffff);
7157 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7158 if (rs
->buf
[0] == 'E')
7159 error (_("target memory fault, section %s, range 0x%s -- 0x%s"),
7160 sectname
, paddr (lma
), paddr (lma
+ size
));
7161 if (rs
->buf
[0] != 'C')
7162 error (_("remote target does not support this operation"));
7164 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
7165 target_crc
= target_crc
* 16 + fromhex (*tmp
);
7167 printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
7168 sectname
, paddr (lma
), paddr (lma
+ size
));
7169 if (host_crc
== target_crc
)
7170 printf_filtered ("matched.\n");
7173 printf_filtered ("MIS-MATCHED!\n");
7177 do_cleanups (old_chain
);
7180 warning (_("One or more sections of the remote executable does not match\n\
7181 the loaded file\n"));
7182 if (args
&& !matched
)
7183 printf_filtered (_("No loaded section named '%s'.\n"), args
);
7186 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
7187 into remote target. The number of bytes written to the remote
7188 target is returned, or -1 for error. */
7191 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
7192 const char *annex
, const gdb_byte
*writebuf
,
7193 ULONGEST offset
, LONGEST len
,
7194 struct packet_config
*packet
)
7199 struct remote_state
*rs
= get_remote_state ();
7200 int max_size
= get_memory_write_packet_size ();
7202 if (packet
->support
== PACKET_DISABLE
)
7205 /* Insert header. */
7206 i
= snprintf (rs
->buf
, max_size
,
7207 "qXfer:%s:write:%s:%s:",
7208 object_name
, annex
? annex
: "",
7209 phex_nz (offset
, sizeof offset
));
7210 max_size
-= (i
+ 1);
7212 /* Escape as much data as fits into rs->buf. */
7213 buf_len
= remote_escape_output
7214 (writebuf
, len
, (rs
->buf
+ i
), &max_size
, max_size
);
7216 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
7217 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7218 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7221 unpack_varlen_hex (rs
->buf
, &n
);
7225 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
7226 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
7227 number of bytes read is returned, or 0 for EOF, or -1 for error.
7228 The number of bytes read may be less than LEN without indicating an
7229 EOF. PACKET is checked and updated to indicate whether the remote
7230 target supports this object. */
7233 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
7235 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
7236 struct packet_config
*packet
)
7238 static char *finished_object
;
7239 static char *finished_annex
;
7240 static ULONGEST finished_offset
;
7242 struct remote_state
*rs
= get_remote_state ();
7243 unsigned int total
= 0;
7244 LONGEST i
, n
, packet_len
;
7246 if (packet
->support
== PACKET_DISABLE
)
7249 /* Check whether we've cached an end-of-object packet that matches
7251 if (finished_object
)
7253 if (strcmp (object_name
, finished_object
) == 0
7254 && strcmp (annex
? annex
: "", finished_annex
) == 0
7255 && offset
== finished_offset
)
7258 /* Otherwise, we're now reading something different. Discard
7260 xfree (finished_object
);
7261 xfree (finished_annex
);
7262 finished_object
= NULL
;
7263 finished_annex
= NULL
;
7266 /* Request only enough to fit in a single packet. The actual data
7267 may not, since we don't know how much of it will need to be escaped;
7268 the target is free to respond with slightly less data. We subtract
7269 five to account for the response type and the protocol frame. */
7270 n
= min (get_remote_packet_size () - 5, len
);
7271 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
7272 object_name
, annex
? annex
: "",
7273 phex_nz (offset
, sizeof offset
),
7274 phex_nz (n
, sizeof n
));
7275 i
= putpkt (rs
->buf
);
7280 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
7281 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7284 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
7285 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
7287 /* 'm' means there is (or at least might be) more data after this
7288 batch. That does not make sense unless there's at least one byte
7289 of data in this reply. */
7290 if (rs
->buf
[0] == 'm' && packet_len
== 1)
7291 error (_("Remote qXfer reply contained no data."));
7293 /* Got some data. */
7294 i
= remote_unescape_input (rs
->buf
+ 1, packet_len
- 1, readbuf
, n
);
7296 /* 'l' is an EOF marker, possibly including a final block of data,
7297 or possibly empty. If we have the final block of a non-empty
7298 object, record this fact to bypass a subsequent partial read. */
7299 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
7301 finished_object
= xstrdup (object_name
);
7302 finished_annex
= xstrdup (annex
? annex
: "");
7303 finished_offset
= offset
+ i
;
7310 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
7311 const char *annex
, gdb_byte
*readbuf
,
7312 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
7314 struct remote_state
*rs
;
7319 set_general_thread (inferior_ptid
);
7321 rs
= get_remote_state ();
7323 /* Handle memory using the standard memory routines. */
7324 if (object
== TARGET_OBJECT_MEMORY
)
7329 /* If the remote target is connected but not running, we should
7330 pass this request down to a lower stratum (e.g. the executable
7332 if (!target_has_execution
)
7335 if (writebuf
!= NULL
)
7336 xfered
= remote_write_bytes (offset
, writebuf
, len
);
7338 xfered
= remote_read_bytes (offset
, readbuf
, len
);
7342 else if (xfered
== 0 && errno
== 0)
7348 /* Handle SPU memory using qxfer packets. */
7349 if (object
== TARGET_OBJECT_SPU
)
7352 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
7353 &remote_protocol_packets
7354 [PACKET_qXfer_spu_read
]);
7356 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
7357 &remote_protocol_packets
7358 [PACKET_qXfer_spu_write
]);
7361 /* Handle extra signal info using qxfer packets. */
7362 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
7365 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
7366 &remote_protocol_packets
7367 [PACKET_qXfer_siginfo_read
]);
7369 return remote_write_qxfer (ops
, "siginfo", annex
, writebuf
, offset
, len
,
7370 &remote_protocol_packets
7371 [PACKET_qXfer_siginfo_write
]);
7374 /* Only handle flash writes. */
7375 if (writebuf
!= NULL
)
7381 case TARGET_OBJECT_FLASH
:
7382 xfered
= remote_flash_write (ops
, offset
, len
, writebuf
);
7386 else if (xfered
== 0 && errno
== 0)
7396 /* Map pre-existing objects onto letters. DO NOT do this for new
7397 objects!!! Instead specify new query packets. */
7400 case TARGET_OBJECT_AVR
:
7404 case TARGET_OBJECT_AUXV
:
7405 gdb_assert (annex
== NULL
);
7406 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
7407 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
7409 case TARGET_OBJECT_AVAILABLE_FEATURES
:
7410 return remote_read_qxfer
7411 (ops
, "features", annex
, readbuf
, offset
, len
,
7412 &remote_protocol_packets
[PACKET_qXfer_features
]);
7414 case TARGET_OBJECT_LIBRARIES
:
7415 return remote_read_qxfer
7416 (ops
, "libraries", annex
, readbuf
, offset
, len
,
7417 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
7419 case TARGET_OBJECT_MEMORY_MAP
:
7420 gdb_assert (annex
== NULL
);
7421 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
7422 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
7424 case TARGET_OBJECT_OSDATA
:
7425 /* Should only get here if we're connected. */
7426 gdb_assert (remote_desc
);
7427 return remote_read_qxfer
7428 (ops
, "osdata", annex
, readbuf
, offset
, len
,
7429 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
7435 /* Note: a zero OFFSET and LEN can be used to query the minimum
7437 if (offset
== 0 && len
== 0)
7438 return (get_remote_packet_size ());
7439 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
7440 large enough let the caller deal with it. */
7441 if (len
< get_remote_packet_size ())
7443 len
= get_remote_packet_size ();
7445 /* Except for querying the minimum buffer size, target must be open. */
7447 error (_("remote query is only available after target open"));
7449 gdb_assert (annex
!= NULL
);
7450 gdb_assert (readbuf
!= NULL
);
7456 /* We used one buffer char for the remote protocol q command and
7457 another for the query type. As the remote protocol encapsulation
7458 uses 4 chars plus one extra in case we are debugging
7459 (remote_debug), we have PBUFZIZ - 7 left to pack the query
7462 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
7464 /* Bad caller may have sent forbidden characters. */
7465 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
7470 gdb_assert (annex
[i
] == '\0');
7472 i
= putpkt (rs
->buf
);
7476 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7477 strcpy ((char *) readbuf
, rs
->buf
);
7479 return strlen ((char *) readbuf
);
7483 remote_search_memory (struct target_ops
* ops
,
7484 CORE_ADDR start_addr
, ULONGEST search_space_len
,
7485 const gdb_byte
*pattern
, ULONGEST pattern_len
,
7486 CORE_ADDR
*found_addrp
)
7488 struct remote_state
*rs
= get_remote_state ();
7489 int max_size
= get_memory_write_packet_size ();
7490 struct packet_config
*packet
=
7491 &remote_protocol_packets
[PACKET_qSearch_memory
];
7492 /* number of packet bytes used to encode the pattern,
7493 this could be more than PATTERN_LEN due to escape characters */
7494 int escaped_pattern_len
;
7495 /* amount of pattern that was encodable in the packet */
7496 int used_pattern_len
;
7499 ULONGEST found_addr
;
7501 /* Don't go to the target if we don't have to.
7502 This is done before checking packet->support to avoid the possibility that
7503 a success for this edge case means the facility works in general. */
7504 if (pattern_len
> search_space_len
)
7506 if (pattern_len
== 0)
7508 *found_addrp
= start_addr
;
7512 /* If we already know the packet isn't supported, fall back to the simple
7513 way of searching memory. */
7515 if (packet
->support
== PACKET_DISABLE
)
7517 /* Target doesn't provided special support, fall back and use the
7518 standard support (copy memory and do the search here). */
7519 return simple_search_memory (ops
, start_addr
, search_space_len
,
7520 pattern
, pattern_len
, found_addrp
);
7523 /* Insert header. */
7524 i
= snprintf (rs
->buf
, max_size
,
7525 "qSearch:memory:%s;%s;",
7526 paddr_nz (start_addr
),
7527 phex_nz (search_space_len
, sizeof (search_space_len
)));
7528 max_size
-= (i
+ 1);
7530 /* Escape as much data as fits into rs->buf. */
7531 escaped_pattern_len
=
7532 remote_escape_output (pattern
, pattern_len
, (rs
->buf
+ i
),
7533 &used_pattern_len
, max_size
);
7535 /* Bail if the pattern is too large. */
7536 if (used_pattern_len
!= pattern_len
)
7537 error ("Pattern is too large to transmit to remote target.");
7539 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
7540 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
7541 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
7543 /* The request may not have worked because the command is not
7544 supported. If so, fall back to the simple way. */
7545 if (packet
->support
== PACKET_DISABLE
)
7547 return simple_search_memory (ops
, start_addr
, search_space_len
,
7548 pattern
, pattern_len
, found_addrp
);
7553 if (rs
->buf
[0] == '0')
7555 else if (rs
->buf
[0] == '1')
7558 if (rs
->buf
[1] != ',')
7559 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7560 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
7561 *found_addrp
= found_addr
;
7564 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
7570 remote_rcmd (char *command
,
7571 struct ui_file
*outbuf
)
7573 struct remote_state
*rs
= get_remote_state ();
7577 error (_("remote rcmd is only available after target open"));
7579 /* Send a NULL command across as an empty command. */
7580 if (command
== NULL
)
7583 /* The query prefix. */
7584 strcpy (rs
->buf
, "qRcmd,");
7585 p
= strchr (rs
->buf
, '\0');
7587 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/) > get_remote_packet_size ())
7588 error (_("\"monitor\" command ``%s'' is too long."), command
);
7590 /* Encode the actual command. */
7591 bin2hex ((gdb_byte
*) command
, p
, 0);
7593 if (putpkt (rs
->buf
) < 0)
7594 error (_("Communication problem with target."));
7596 /* get/display the response */
7601 /* XXX - see also tracepoint.c:remote_get_noisy_reply(). */
7603 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7606 error (_("Target does not support this command."));
7607 if (buf
[0] == 'O' && buf
[1] != 'K')
7609 remote_console_output (buf
+ 1); /* 'O' message from stub. */
7612 if (strcmp (buf
, "OK") == 0)
7614 if (strlen (buf
) == 3 && buf
[0] == 'E'
7615 && isdigit (buf
[1]) && isdigit (buf
[2]))
7617 error (_("Protocol error with Rcmd"));
7619 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
7621 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
7622 fputc_unfiltered (c
, outbuf
);
7628 static VEC(mem_region_s
) *
7629 remote_memory_map (struct target_ops
*ops
)
7631 VEC(mem_region_s
) *result
= NULL
;
7632 char *text
= target_read_stralloc (¤t_target
,
7633 TARGET_OBJECT_MEMORY_MAP
, NULL
);
7637 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
7638 result
= parse_memory_map (text
);
7639 do_cleanups (back_to
);
7646 packet_command (char *args
, int from_tty
)
7648 struct remote_state
*rs
= get_remote_state ();
7651 error (_("command can only be used with remote target"));
7654 error (_("remote-packet command requires packet text as argument"));
7656 puts_filtered ("sending: ");
7657 print_packet (args
);
7658 puts_filtered ("\n");
7661 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7662 puts_filtered ("received: ");
7663 print_packet (rs
->buf
);
7664 puts_filtered ("\n");
7668 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
7670 static void display_thread_info (struct gdb_ext_thread_info
*info
);
7672 static void threadset_test_cmd (char *cmd
, int tty
);
7674 static void threadalive_test (char *cmd
, int tty
);
7676 static void threadlist_test_cmd (char *cmd
, int tty
);
7678 int get_and_display_threadinfo (threadref
*ref
);
7680 static void threadinfo_test_cmd (char *cmd
, int tty
);
7682 static int thread_display_step (threadref
*ref
, void *context
);
7684 static void threadlist_update_test_cmd (char *cmd
, int tty
);
7686 static void init_remote_threadtests (void);
7688 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
7691 threadset_test_cmd (char *cmd
, int tty
)
7693 int sample_thread
= SAMPLE_THREAD
;
7695 printf_filtered (_("Remote threadset test\n"));
7696 set_general_thread (sample_thread
);
7701 threadalive_test (char *cmd
, int tty
)
7703 int sample_thread
= SAMPLE_THREAD
;
7704 int pid
= ptid_get_pid (inferior_ptid
);
7705 ptid_t ptid
= ptid_build (pid
, 0, sample_thread
);
7707 if (remote_thread_alive (ptid
))
7708 printf_filtered ("PASS: Thread alive test\n");
7710 printf_filtered ("FAIL: Thread alive test\n");
7713 void output_threadid (char *title
, threadref
*ref
);
7716 output_threadid (char *title
, threadref
*ref
)
7720 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
7722 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
7726 threadlist_test_cmd (char *cmd
, int tty
)
7729 threadref nextthread
;
7730 int done
, result_count
;
7731 threadref threadlist
[3];
7733 printf_filtered ("Remote Threadlist test\n");
7734 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
7735 &result_count
, &threadlist
[0]))
7736 printf_filtered ("FAIL: threadlist test\n");
7739 threadref
*scan
= threadlist
;
7740 threadref
*limit
= scan
+ result_count
;
7742 while (scan
< limit
)
7743 output_threadid (" thread ", scan
++);
7748 display_thread_info (struct gdb_ext_thread_info
*info
)
7750 output_threadid ("Threadid: ", &info
->threadid
);
7751 printf_filtered ("Name: %s\n ", info
->shortname
);
7752 printf_filtered ("State: %s\n", info
->display
);
7753 printf_filtered ("other: %s\n\n", info
->more_display
);
7757 get_and_display_threadinfo (threadref
*ref
)
7761 struct gdb_ext_thread_info threadinfo
;
7763 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
7764 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
7765 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
7766 display_thread_info (&threadinfo
);
7771 threadinfo_test_cmd (char *cmd
, int tty
)
7773 int athread
= SAMPLE_THREAD
;
7777 int_to_threadref (&thread
, athread
);
7778 printf_filtered ("Remote Threadinfo test\n");
7779 if (!get_and_display_threadinfo (&thread
))
7780 printf_filtered ("FAIL cannot get thread info\n");
7784 thread_display_step (threadref
*ref
, void *context
)
7786 /* output_threadid(" threadstep ",ref); *//* simple test */
7787 return get_and_display_threadinfo (ref
);
7791 threadlist_update_test_cmd (char *cmd
, int tty
)
7793 printf_filtered ("Remote Threadlist update test\n");
7794 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
7798 init_remote_threadtests (void)
7800 add_com ("tlist", class_obscure
, threadlist_test_cmd
, _("\
7801 Fetch and print the remote list of thread identifiers, one pkt only"));
7802 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
7803 _("Fetch and display info about one thread"));
7804 add_com ("tset", class_obscure
, threadset_test_cmd
,
7805 _("Test setting to a different thread"));
7806 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
7807 _("Iterate through updating all remote thread info"));
7808 add_com ("talive", class_obscure
, threadalive_test
,
7809 _(" Remote thread alive test "));
7814 /* Convert a thread ID to a string. Returns the string in a static
7818 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
7820 static char buf
[64];
7821 struct remote_state
*rs
= get_remote_state ();
7823 if (ptid_equal (magic_null_ptid
, ptid
))
7825 xsnprintf (buf
, sizeof buf
, "Thread <main>");
7828 else if (remote_multi_process_p (rs
)
7829 && ptid_get_tid (ptid
) != 0 && ptid_get_pid (ptid
) != 0)
7831 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
7832 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
7835 else if (ptid_get_tid (ptid
) != 0)
7837 xsnprintf (buf
, sizeof buf
, "Thread %ld",
7838 ptid_get_tid (ptid
));
7842 return normal_pid_to_str (ptid
);
7845 /* Get the address of the thread local variable in OBJFILE which is
7846 stored at OFFSET within the thread local storage for thread PTID. */
7849 remote_get_thread_local_address (struct target_ops
*ops
,
7850 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
7852 if (remote_protocol_packets
[PACKET_qGetTLSAddr
].support
!= PACKET_DISABLE
)
7854 struct remote_state
*rs
= get_remote_state ();
7856 char *endp
= rs
->buf
+ get_remote_packet_size ();
7857 enum packet_result result
;
7859 strcpy (p
, "qGetTLSAddr:");
7861 p
= write_ptid (p
, endp
, ptid
);
7863 p
+= hexnumstr (p
, offset
);
7865 p
+= hexnumstr (p
, lm
);
7869 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7870 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
7871 if (result
== PACKET_OK
)
7875 unpack_varlen_hex (rs
->buf
, &result
);
7878 else if (result
== PACKET_UNKNOWN
)
7879 throw_error (TLS_GENERIC_ERROR
,
7880 _("Remote target doesn't support qGetTLSAddr packet"));
7882 throw_error (TLS_GENERIC_ERROR
,
7883 _("Remote target failed to process qGetTLSAddr request"));
7886 throw_error (TLS_GENERIC_ERROR
,
7887 _("TLS not supported or disabled on this target"));
7892 /* Support for inferring a target description based on the current
7893 architecture and the size of a 'g' packet. While the 'g' packet
7894 can have any size (since optional registers can be left off the
7895 end), some sizes are easily recognizable given knowledge of the
7896 approximate architecture. */
7898 struct remote_g_packet_guess
7901 const struct target_desc
*tdesc
;
7903 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
7904 DEF_VEC_O(remote_g_packet_guess_s
);
7906 struct remote_g_packet_data
7908 VEC(remote_g_packet_guess_s
) *guesses
;
7911 static struct gdbarch_data
*remote_g_packet_data_handle
;
7914 remote_g_packet_data_init (struct obstack
*obstack
)
7916 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
7920 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
7921 const struct target_desc
*tdesc
)
7923 struct remote_g_packet_data
*data
7924 = gdbarch_data (gdbarch
, remote_g_packet_data_handle
);
7925 struct remote_g_packet_guess new_guess
, *guess
;
7928 gdb_assert (tdesc
!= NULL
);
7931 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7933 if (guess
->bytes
== bytes
)
7934 internal_error (__FILE__
, __LINE__
,
7935 "Duplicate g packet description added for size %d",
7938 new_guess
.bytes
= bytes
;
7939 new_guess
.tdesc
= tdesc
;
7940 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
7943 /* Return 1 if remote_read_description would do anything on this target
7944 and architecture, 0 otherwise. */
7947 remote_read_description_p (struct target_ops
*target
)
7949 struct remote_g_packet_data
*data
7950 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7952 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7958 static const struct target_desc
*
7959 remote_read_description (struct target_ops
*target
)
7961 struct remote_g_packet_data
*data
7962 = gdbarch_data (target_gdbarch
, remote_g_packet_data_handle
);
7964 /* Do not try this during initial connection, when we do not know
7965 whether there is a running but stopped thread. */
7966 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
7969 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
7971 struct remote_g_packet_guess
*guess
;
7973 int bytes
= send_g_packet ();
7976 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
7978 if (guess
->bytes
== bytes
)
7979 return guess
->tdesc
;
7981 /* We discard the g packet. A minor optimization would be to
7982 hold on to it, and fill the register cache once we have selected
7983 an architecture, but it's too tricky to do safely. */
7989 /* Remote file transfer support. This is host-initiated I/O, not
7990 target-initiated; for target-initiated, see remote-fileio.c. */
7992 /* If *LEFT is at least the length of STRING, copy STRING to
7993 *BUFFER, update *BUFFER to point to the new end of the buffer, and
7994 decrease *LEFT. Otherwise raise an error. */
7997 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
7999 int len
= strlen (string
);
8002 error (_("Packet too long for target."));
8004 memcpy (*buffer
, string
, len
);
8008 /* NUL-terminate the buffer as a convenience, if there is
8014 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
8015 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8016 decrease *LEFT. Otherwise raise an error. */
8019 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
8022 if (2 * len
> *left
)
8023 error (_("Packet too long for target."));
8025 bin2hex (bytes
, *buffer
, len
);
8029 /* NUL-terminate the buffer as a convenience, if there is
8035 /* If *LEFT is large enough, convert VALUE to hex and add it to
8036 *BUFFER, update *BUFFER to point to the new end of the buffer, and
8037 decrease *LEFT. Otherwise raise an error. */
8040 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
8042 int len
= hexnumlen (value
);
8045 error (_("Packet too long for target."));
8047 hexnumstr (*buffer
, value
);
8051 /* NUL-terminate the buffer as a convenience, if there is
8057 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
8058 value, *REMOTE_ERRNO to the remote error number or zero if none
8059 was included, and *ATTACHMENT to point to the start of the annex
8060 if any. The length of the packet isn't needed here; there may
8061 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
8063 Return 0 if the packet could be parsed, -1 if it could not. If
8064 -1 is returned, the other variables may not be initialized. */
8067 remote_hostio_parse_result (char *buffer
, int *retcode
,
8068 int *remote_errno
, char **attachment
)
8075 if (buffer
[0] != 'F')
8079 *retcode
= strtol (&buffer
[1], &p
, 16);
8080 if (errno
!= 0 || p
== &buffer
[1])
8083 /* Check for ",errno". */
8087 *remote_errno
= strtol (p
+ 1, &p2
, 16);
8088 if (errno
!= 0 || p
+ 1 == p2
)
8093 /* Check for ";attachment". If there is no attachment, the
8094 packet should end here. */
8097 *attachment
= p
+ 1;
8100 else if (*p
== '\0')
8106 /* Send a prepared I/O packet to the target and read its response.
8107 The prepared packet is in the global RS->BUF before this function
8108 is called, and the answer is there when we return.
8110 COMMAND_BYTES is the length of the request to send, which may include
8111 binary data. WHICH_PACKET is the packet configuration to check
8112 before attempting a packet. If an error occurs, *REMOTE_ERRNO
8113 is set to the error number and -1 is returned. Otherwise the value
8114 returned by the function is returned.
8116 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
8117 attachment is expected; an error will be reported if there's a
8118 mismatch. If one is found, *ATTACHMENT will be set to point into
8119 the packet buffer and *ATTACHMENT_LEN will be set to the
8120 attachment's length. */
8123 remote_hostio_send_command (int command_bytes
, int which_packet
,
8124 int *remote_errno
, char **attachment
,
8125 int *attachment_len
)
8127 struct remote_state
*rs
= get_remote_state ();
8128 int ret
, bytes_read
;
8129 char *attachment_tmp
;
8132 || remote_protocol_packets
[which_packet
].support
== PACKET_DISABLE
)
8134 *remote_errno
= FILEIO_ENOSYS
;
8138 putpkt_binary (rs
->buf
, command_bytes
);
8139 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
8141 /* If it timed out, something is wrong. Don't try to parse the
8145 *remote_errno
= FILEIO_EINVAL
;
8149 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
8152 *remote_errno
= FILEIO_EINVAL
;
8154 case PACKET_UNKNOWN
:
8155 *remote_errno
= FILEIO_ENOSYS
;
8161 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
8164 *remote_errno
= FILEIO_EINVAL
;
8168 /* Make sure we saw an attachment if and only if we expected one. */
8169 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
8170 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
8172 *remote_errno
= FILEIO_EINVAL
;
8176 /* If an attachment was found, it must point into the packet buffer;
8177 work out how many bytes there were. */
8178 if (attachment_tmp
!= NULL
)
8180 *attachment
= attachment_tmp
;
8181 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
8187 /* Open FILENAME on the remote target, using FLAGS and MODE. Return a
8188 remote file descriptor, or -1 if an error occurs (and set
8192 remote_hostio_open (const char *filename
, int flags
, int mode
,
8195 struct remote_state
*rs
= get_remote_state ();
8197 int left
= get_remote_packet_size () - 1;
8199 remote_buffer_add_string (&p
, &left
, "vFile:open:");
8201 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8203 remote_buffer_add_string (&p
, &left
, ",");
8205 remote_buffer_add_int (&p
, &left
, flags
);
8206 remote_buffer_add_string (&p
, &left
, ",");
8208 remote_buffer_add_int (&p
, &left
, mode
);
8210 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
8211 remote_errno
, NULL
, NULL
);
8214 /* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
8215 Return the number of bytes written, or -1 if an error occurs (and
8216 set *REMOTE_ERRNO). */
8219 remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
8220 ULONGEST offset
, int *remote_errno
)
8222 struct remote_state
*rs
= get_remote_state ();
8224 int left
= get_remote_packet_size ();
8227 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
8229 remote_buffer_add_int (&p
, &left
, fd
);
8230 remote_buffer_add_string (&p
, &left
, ",");
8232 remote_buffer_add_int (&p
, &left
, offset
);
8233 remote_buffer_add_string (&p
, &left
, ",");
8235 p
+= remote_escape_output (write_buf
, len
, p
, &out_len
,
8236 get_remote_packet_size () - (p
- rs
->buf
));
8238 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
8239 remote_errno
, NULL
, NULL
);
8242 /* Read up to LEN bytes FD on the remote target into READ_BUF
8243 Return the number of bytes read, or -1 if an error occurs (and
8244 set *REMOTE_ERRNO). */
8247 remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
8248 ULONGEST offset
, int *remote_errno
)
8250 struct remote_state
*rs
= get_remote_state ();
8253 int left
= get_remote_packet_size ();
8254 int ret
, attachment_len
;
8257 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
8259 remote_buffer_add_int (&p
, &left
, fd
);
8260 remote_buffer_add_string (&p
, &left
, ",");
8262 remote_buffer_add_int (&p
, &left
, len
);
8263 remote_buffer_add_string (&p
, &left
, ",");
8265 remote_buffer_add_int (&p
, &left
, offset
);
8267 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
8268 remote_errno
, &attachment
,
8274 read_len
= remote_unescape_input (attachment
, attachment_len
,
8276 if (read_len
!= ret
)
8277 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
8282 /* Close FD on the remote target. Return 0, or -1 if an error occurs
8283 (and set *REMOTE_ERRNO). */
8286 remote_hostio_close (int fd
, int *remote_errno
)
8288 struct remote_state
*rs
= get_remote_state ();
8290 int left
= get_remote_packet_size () - 1;
8292 remote_buffer_add_string (&p
, &left
, "vFile:close:");
8294 remote_buffer_add_int (&p
, &left
, fd
);
8296 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
8297 remote_errno
, NULL
, NULL
);
8300 /* Unlink FILENAME on the remote target. Return 0, or -1 if an error
8301 occurs (and set *REMOTE_ERRNO). */
8304 remote_hostio_unlink (const char *filename
, int *remote_errno
)
8306 struct remote_state
*rs
= get_remote_state ();
8308 int left
= get_remote_packet_size () - 1;
8310 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
8312 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
8315 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
8316 remote_errno
, NULL
, NULL
);
8320 remote_fileio_errno_to_host (int errnum
)
8344 case FILEIO_ENOTDIR
:
8364 case FILEIO_ENAMETOOLONG
:
8365 return ENAMETOOLONG
;
8371 remote_hostio_error (int errnum
)
8373 int host_error
= remote_fileio_errno_to_host (errnum
);
8375 if (host_error
== -1)
8376 error (_("Unknown remote I/O error %d"), errnum
);
8378 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
8382 remote_hostio_close_cleanup (void *opaque
)
8384 int fd
= *(int *) opaque
;
8387 remote_hostio_close (fd
, &remote_errno
);
8392 remote_bfd_iovec_open (struct bfd
*abfd
, void *open_closure
)
8394 const char *filename
= bfd_get_filename (abfd
);
8395 int fd
, remote_errno
;
8398 gdb_assert (remote_filename_p (filename
));
8400 fd
= remote_hostio_open (filename
+ 7, FILEIO_O_RDONLY
, 0, &remote_errno
);
8403 errno
= remote_fileio_errno_to_host (remote_errno
);
8404 bfd_set_error (bfd_error_system_call
);
8408 stream
= xmalloc (sizeof (int));
8414 remote_bfd_iovec_close (struct bfd
*abfd
, void *stream
)
8416 int fd
= *(int *)stream
;
8421 /* Ignore errors on close; these may happen if the remote
8422 connection was already torn down. */
8423 remote_hostio_close (fd
, &remote_errno
);
8429 remote_bfd_iovec_pread (struct bfd
*abfd
, void *stream
, void *buf
,
8430 file_ptr nbytes
, file_ptr offset
)
8432 int fd
= *(int *)stream
;
8434 file_ptr pos
, bytes
;
8437 while (nbytes
> pos
)
8439 bytes
= remote_hostio_pread (fd
, (char *)buf
+ pos
, nbytes
- pos
,
8440 offset
+ pos
, &remote_errno
);
8442 /* Success, but no bytes, means end-of-file. */
8446 errno
= remote_fileio_errno_to_host (remote_errno
);
8447 bfd_set_error (bfd_error_system_call
);
8458 remote_bfd_iovec_stat (struct bfd
*abfd
, void *stream
, struct stat
*sb
)
8460 /* FIXME: We should probably implement remote_hostio_stat. */
8461 sb
->st_size
= INT_MAX
;
8466 remote_filename_p (const char *filename
)
8468 return strncmp (filename
, "remote:", 7) == 0;
8472 remote_bfd_open (const char *remote_file
, const char *target
)
8474 return bfd_openr_iovec (remote_file
, target
,
8475 remote_bfd_iovec_open
, NULL
,
8476 remote_bfd_iovec_pread
,
8477 remote_bfd_iovec_close
,
8478 remote_bfd_iovec_stat
);
8482 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
8484 struct cleanup
*back_to
, *close_cleanup
;
8485 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8488 int bytes_in_buffer
;
8493 error (_("command can only be used with remote target"));
8495 file
= fopen (local_file
, "rb");
8497 perror_with_name (local_file
);
8498 back_to
= make_cleanup_fclose (file
);
8500 fd
= remote_hostio_open (remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
8502 0700, &remote_errno
);
8504 remote_hostio_error (remote_errno
);
8506 /* Send up to this many bytes at once. They won't all fit in the
8507 remote packet limit, so we'll transfer slightly fewer. */
8508 io_size
= get_remote_packet_size ();
8509 buffer
= xmalloc (io_size
);
8510 make_cleanup (xfree
, buffer
);
8512 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8514 bytes_in_buffer
= 0;
8517 while (bytes_in_buffer
|| !saw_eof
)
8521 bytes
= fread (buffer
+ bytes_in_buffer
, 1, io_size
- bytes_in_buffer
,
8526 error (_("Error reading %s."), local_file
);
8529 /* EOF. Unless there is something still in the
8530 buffer from the last iteration, we are done. */
8532 if (bytes_in_buffer
== 0)
8540 bytes
+= bytes_in_buffer
;
8541 bytes_in_buffer
= 0;
8543 retcode
= remote_hostio_pwrite (fd
, buffer
, bytes
, offset
, &remote_errno
);
8546 remote_hostio_error (remote_errno
);
8547 else if (retcode
== 0)
8548 error (_("Remote write of %d bytes returned 0!"), bytes
);
8549 else if (retcode
< bytes
)
8551 /* Short write. Save the rest of the read data for the next
8553 bytes_in_buffer
= bytes
- retcode
;
8554 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
8560 discard_cleanups (close_cleanup
);
8561 if (remote_hostio_close (fd
, &remote_errno
))
8562 remote_hostio_error (remote_errno
);
8565 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
8566 do_cleanups (back_to
);
8570 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
8572 struct cleanup
*back_to
, *close_cleanup
;
8573 int retcode
, fd
, remote_errno
, bytes
, io_size
;
8579 error (_("command can only be used with remote target"));
8581 fd
= remote_hostio_open (remote_file
, FILEIO_O_RDONLY
, 0, &remote_errno
);
8583 remote_hostio_error (remote_errno
);
8585 file
= fopen (local_file
, "wb");
8587 perror_with_name (local_file
);
8588 back_to
= make_cleanup_fclose (file
);
8590 /* Send up to this many bytes at once. They won't all fit in the
8591 remote packet limit, so we'll transfer slightly fewer. */
8592 io_size
= get_remote_packet_size ();
8593 buffer
= xmalloc (io_size
);
8594 make_cleanup (xfree
, buffer
);
8596 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
8601 bytes
= remote_hostio_pread (fd
, buffer
, io_size
, offset
, &remote_errno
);
8603 /* Success, but no bytes, means end-of-file. */
8606 remote_hostio_error (remote_errno
);
8610 bytes
= fwrite (buffer
, 1, bytes
, file
);
8612 perror_with_name (local_file
);
8615 discard_cleanups (close_cleanup
);
8616 if (remote_hostio_close (fd
, &remote_errno
))
8617 remote_hostio_error (remote_errno
);
8620 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
8621 do_cleanups (back_to
);
8625 remote_file_delete (const char *remote_file
, int from_tty
)
8627 int retcode
, remote_errno
;
8630 error (_("command can only be used with remote target"));
8632 retcode
= remote_hostio_unlink (remote_file
, &remote_errno
);
8634 remote_hostio_error (remote_errno
);
8637 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
8641 remote_put_command (char *args
, int from_tty
)
8643 struct cleanup
*back_to
;
8647 error_no_arg (_("file to put"));
8649 argv
= gdb_buildargv (args
);
8650 back_to
= make_cleanup_freeargv (argv
);
8651 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8652 error (_("Invalid parameters to remote put"));
8654 remote_file_put (argv
[0], argv
[1], from_tty
);
8656 do_cleanups (back_to
);
8660 remote_get_command (char *args
, int from_tty
)
8662 struct cleanup
*back_to
;
8666 error_no_arg (_("file to get"));
8668 argv
= gdb_buildargv (args
);
8669 back_to
= make_cleanup_freeargv (argv
);
8670 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
8671 error (_("Invalid parameters to remote get"));
8673 remote_file_get (argv
[0], argv
[1], from_tty
);
8675 do_cleanups (back_to
);
8679 remote_delete_command (char *args
, int from_tty
)
8681 struct cleanup
*back_to
;
8685 error_no_arg (_("file to delete"));
8687 argv
= gdb_buildargv (args
);
8688 back_to
= make_cleanup_freeargv (argv
);
8689 if (argv
[0] == NULL
|| argv
[1] != NULL
)
8690 error (_("Invalid parameters to remote delete"));
8692 remote_file_delete (argv
[0], from_tty
);
8694 do_cleanups (back_to
);
8698 remote_command (char *args
, int from_tty
)
8700 help_list (remote_cmdlist
, "remote ", -1, gdb_stdout
);
8703 static int remote_target_can_reverse
= 1;
8706 remote_can_execute_reverse (void)
8708 return remote_target_can_reverse
;
8712 remote_supports_non_stop (void)
8718 remote_supports_multi_process (void)
8720 struct remote_state
*rs
= get_remote_state ();
8721 return remote_multi_process_p (rs
);
8725 init_remote_ops (void)
8727 remote_ops
.to_shortname
= "remote";
8728 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
8730 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8731 Specify the serial device it is connected to\n\
8732 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
8733 remote_ops
.to_open
= remote_open
;
8734 remote_ops
.to_close
= remote_close
;
8735 remote_ops
.to_detach
= remote_detach
;
8736 remote_ops
.to_disconnect
= remote_disconnect
;
8737 remote_ops
.to_resume
= remote_resume
;
8738 remote_ops
.to_wait
= remote_wait
;
8739 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
8740 remote_ops
.to_store_registers
= remote_store_registers
;
8741 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
8742 remote_ops
.deprecated_xfer_memory
= remote_xfer_memory
;
8743 remote_ops
.to_files_info
= remote_files_info
;
8744 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
8745 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
8746 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
8747 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
8748 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
8749 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
8750 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
8751 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
8752 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
8753 remote_ops
.to_kill
= remote_kill
;
8754 remote_ops
.to_load
= generic_load
;
8755 remote_ops
.to_mourn_inferior
= remote_mourn
;
8756 remote_ops
.to_thread_alive
= remote_thread_alive
;
8757 remote_ops
.to_find_new_threads
= remote_threads_info
;
8758 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
8759 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
8760 remote_ops
.to_stop
= remote_stop
;
8761 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
8762 remote_ops
.to_rcmd
= remote_rcmd
;
8763 remote_ops
.to_log_command
= serial_log_command
;
8764 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
8765 remote_ops
.to_stratum
= process_stratum
;
8766 remote_ops
.to_has_all_memory
= 1;
8767 remote_ops
.to_has_memory
= 1;
8768 remote_ops
.to_has_stack
= 1;
8769 remote_ops
.to_has_registers
= 1;
8770 remote_ops
.to_has_execution
= 1;
8771 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
8772 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
8773 remote_ops
.to_magic
= OPS_MAGIC
;
8774 remote_ops
.to_memory_map
= remote_memory_map
;
8775 remote_ops
.to_flash_erase
= remote_flash_erase
;
8776 remote_ops
.to_flash_done
= remote_flash_done
;
8777 remote_ops
.to_read_description
= remote_read_description
;
8778 remote_ops
.to_search_memory
= remote_search_memory
;
8779 remote_ops
.to_can_async_p
= remote_can_async_p
;
8780 remote_ops
.to_is_async_p
= remote_is_async_p
;
8781 remote_ops
.to_async
= remote_async
;
8782 remote_ops
.to_async_mask
= remote_async_mask
;
8783 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
8784 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
8785 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
8786 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
8789 /* Set up the extended remote vector by making a copy of the standard
8790 remote vector and adding to it. */
8793 init_extended_remote_ops (void)
8795 extended_remote_ops
= remote_ops
;
8797 extended_remote_ops
.to_shortname
= "extended-remote";
8798 extended_remote_ops
.to_longname
=
8799 "Extended remote serial target in gdb-specific protocol";
8800 extended_remote_ops
.to_doc
=
8801 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
8802 Specify the serial device it is connected to (e.g. /dev/ttya).";
8803 extended_remote_ops
.to_open
= extended_remote_open
;
8804 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
8805 extended_remote_ops
.to_mourn_inferior
= extended_remote_mourn
;
8806 extended_remote_ops
.to_detach
= extended_remote_detach
;
8807 extended_remote_ops
.to_attach
= extended_remote_attach
;
8808 extended_remote_ops
.to_kill
= extended_remote_kill
;
8812 remote_can_async_p (void)
8814 if (!target_async_permitted
)
8815 /* We only enable async when the user specifically asks for it. */
8818 /* We're async whenever the serial device is. */
8819 return remote_async_mask_value
&& serial_can_async_p (remote_desc
);
8823 remote_is_async_p (void)
8825 if (!target_async_permitted
)
8826 /* We only enable async when the user specifically asks for it. */
8829 /* We're async whenever the serial device is. */
8830 return remote_async_mask_value
&& serial_is_async_p (remote_desc
);
8833 /* Pass the SERIAL event on and up to the client. One day this code
8834 will be able to delay notifying the client of an event until the
8835 point where an entire packet has been received. */
8837 static void (*async_client_callback
) (enum inferior_event_type event_type
,
8839 static void *async_client_context
;
8840 static serial_event_ftype remote_async_serial_handler
;
8843 remote_async_serial_handler (struct serial
*scb
, void *context
)
8845 /* Don't propogate error information up to the client. Instead let
8846 the client find out about the error by querying the target. */
8847 async_client_callback (INF_REG_EVENT
, async_client_context
);
8851 remote_async_inferior_event_handler (gdb_client_data data
)
8853 inferior_event_handler (INF_REG_EVENT
, NULL
);
8857 remote_async_get_pending_events_handler (gdb_client_data data
)
8859 remote_get_pending_stop_replies ();
8863 remote_async (void (*callback
) (enum inferior_event_type event_type
,
8864 void *context
), void *context
)
8866 if (remote_async_mask_value
== 0)
8867 internal_error (__FILE__
, __LINE__
,
8868 _("Calling remote_async when async is masked"));
8870 if (callback
!= NULL
)
8872 serial_async (remote_desc
, remote_async_serial_handler
, NULL
);
8873 async_client_callback
= callback
;
8874 async_client_context
= context
;
8877 serial_async (remote_desc
, NULL
, NULL
);
8881 remote_async_mask (int new_mask
)
8883 int curr_mask
= remote_async_mask_value
;
8884 remote_async_mask_value
= new_mask
;
8889 set_remote_cmd (char *args
, int from_tty
)
8891 help_list (remote_set_cmdlist
, "set remote ", -1, gdb_stdout
);
8895 show_remote_cmd (char *args
, int from_tty
)
8897 /* We can't just use cmd_show_list here, because we want to skip
8898 the redundant "show remote Z-packet" and the legacy aliases. */
8899 struct cleanup
*showlist_chain
;
8900 struct cmd_list_element
*list
= remote_show_cmdlist
;
8902 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
8903 for (; list
!= NULL
; list
= list
->next
)
8904 if (strcmp (list
->name
, "Z-packet") == 0)
8906 else if (list
->type
== not_set_cmd
)
8907 /* Alias commands are exactly like the original, except they
8908 don't have the normal type. */
8912 struct cleanup
*option_chain
8913 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
8914 ui_out_field_string (uiout
, "name", list
->name
);
8915 ui_out_text (uiout
, ": ");
8916 if (list
->type
== show_cmd
)
8917 do_setshow_command ((char *) NULL
, from_tty
, list
);
8919 cmd_func (list
, NULL
, from_tty
);
8920 /* Close the tuple. */
8921 do_cleanups (option_chain
);
8924 /* Close the tuple. */
8925 do_cleanups (showlist_chain
);
8929 /* Function to be called whenever a new objfile (shlib) is detected. */
8931 remote_new_objfile (struct objfile
*objfile
)
8933 if (remote_desc
!= 0) /* Have a remote connection. */
8934 remote_check_symbols (objfile
);
8938 _initialize_remote (void)
8940 struct remote_state
*rs
;
8942 /* architecture specific data */
8943 remote_gdbarch_data_handle
=
8944 gdbarch_data_register_post_init (init_remote_state
);
8945 remote_g_packet_data_handle
=
8946 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
8948 /* Initialize the per-target state. At the moment there is only one
8949 of these, not one per target. Only one target is active at a
8950 time. The default buffer size is unimportant; it will be expanded
8951 whenever a larger buffer is needed. */
8952 rs
= get_remote_state_raw ();
8954 rs
->buf
= xmalloc (rs
->buf_size
);
8957 add_target (&remote_ops
);
8959 init_extended_remote_ops ();
8960 add_target (&extended_remote_ops
);
8962 /* Hook into new objfile notification. */
8963 observer_attach_new_objfile (remote_new_objfile
);
8965 /* Set up signal handlers. */
8966 sigint_remote_token
=
8967 create_async_signal_handler (async_remote_interrupt
, NULL
);
8968 sigint_remote_twice_token
=
8969 create_async_signal_handler (inferior_event_handler_wrapper
, NULL
);
8972 init_remote_threadtests ();
8975 /* set/show remote ... */
8977 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
8978 Remote protocol specific variables\n\
8979 Configure various remote-protocol specific variables such as\n\
8980 the packets being used"),
8981 &remote_set_cmdlist
, "set remote ",
8982 0 /* allow-unknown */, &setlist
);
8983 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
8984 Remote protocol specific variables\n\
8985 Configure various remote-protocol specific variables such as\n\
8986 the packets being used"),
8987 &remote_show_cmdlist
, "show remote ",
8988 0 /* allow-unknown */, &showlist
);
8990 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
8991 Compare section data on target to the exec file.\n\
8992 Argument is a single section name (default: all loaded sections)."),
8995 add_cmd ("packet", class_maintenance
, packet_command
, _("\
8996 Send an arbitrary packet to a remote target.\n\
8997 maintenance packet TEXT\n\
8998 If GDB is talking to an inferior via the GDB serial protocol, then\n\
8999 this command sends the string TEXT to the inferior, and displays the\n\
9000 response packet. GDB supplies the initial `$' character, and the\n\
9001 terminating `#' character and checksum."),
9004 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
9005 Set whether to send break if interrupted."), _("\
9006 Show whether to send break if interrupted."), _("\
9007 If set, a break, instead of a cntrl-c, is sent to the remote target."),
9008 NULL
, NULL
, /* FIXME: i18n: Whether to send break if interrupted is %s. */
9009 &setlist
, &showlist
);
9011 /* Install commands for configuring memory read/write packets. */
9013 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
9014 Set the maximum number of bytes per memory write packet (deprecated)."),
9016 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
9017 Show the maximum number of bytes per memory write packet (deprecated)."),
9019 add_cmd ("memory-write-packet-size", no_class
,
9020 set_memory_write_packet_size
, _("\
9021 Set the maximum number of bytes per memory-write packet.\n\
9022 Specify the number of bytes in a packet or 0 (zero) for the\n\
9023 default packet size. The actual limit is further reduced\n\
9024 dependent on the target. Specify ``fixed'' to disable the\n\
9025 further restriction and ``limit'' to enable that restriction."),
9026 &remote_set_cmdlist
);
9027 add_cmd ("memory-read-packet-size", no_class
,
9028 set_memory_read_packet_size
, _("\
9029 Set the maximum number of bytes per memory-read packet.\n\
9030 Specify the number of bytes in a packet or 0 (zero) for the\n\
9031 default packet size. The actual limit is further reduced\n\
9032 dependent on the target. Specify ``fixed'' to disable the\n\
9033 further restriction and ``limit'' to enable that restriction."),
9034 &remote_set_cmdlist
);
9035 add_cmd ("memory-write-packet-size", no_class
,
9036 show_memory_write_packet_size
,
9037 _("Show the maximum number of bytes per memory-write packet."),
9038 &remote_show_cmdlist
);
9039 add_cmd ("memory-read-packet-size", no_class
,
9040 show_memory_read_packet_size
,
9041 _("Show the maximum number of bytes per memory-read packet."),
9042 &remote_show_cmdlist
);
9044 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
9045 &remote_hw_watchpoint_limit
, _("\
9046 Set the maximum number of target hardware watchpoints."), _("\
9047 Show the maximum number of target hardware watchpoints."), _("\
9048 Specify a negative limit for unlimited."),
9049 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware watchpoints is %s. */
9050 &remote_set_cmdlist
, &remote_show_cmdlist
);
9051 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
9052 &remote_hw_breakpoint_limit
, _("\
9053 Set the maximum number of target hardware breakpoints."), _("\
9054 Show the maximum number of target hardware breakpoints."), _("\
9055 Specify a negative limit for unlimited."),
9056 NULL
, NULL
, /* FIXME: i18n: The maximum number of target hardware breakpoints is %s. */
9057 &remote_set_cmdlist
, &remote_show_cmdlist
);
9059 add_setshow_integer_cmd ("remoteaddresssize", class_obscure
,
9060 &remote_address_size
, _("\
9061 Set the maximum size of the address (in bits) in a memory packet."), _("\
9062 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
9064 NULL
, /* FIXME: i18n: */
9065 &setlist
, &showlist
);
9067 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
9068 "X", "binary-download", 1);
9070 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
9071 "vCont", "verbose-resume", 0);
9073 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
9074 "QPassSignals", "pass-signals", 0);
9076 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
9077 "qSymbol", "symbol-lookup", 0);
9079 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
9080 "P", "set-register", 1);
9082 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
9083 "p", "fetch-register", 1);
9085 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
9086 "Z0", "software-breakpoint", 0);
9088 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
9089 "Z1", "hardware-breakpoint", 0);
9091 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
9092 "Z2", "write-watchpoint", 0);
9094 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
9095 "Z3", "read-watchpoint", 0);
9097 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
9098 "Z4", "access-watchpoint", 0);
9100 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
9101 "qXfer:auxv:read", "read-aux-vector", 0);
9103 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
9104 "qXfer:features:read", "target-features", 0);
9106 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
9107 "qXfer:libraries:read", "library-info", 0);
9109 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
9110 "qXfer:memory-map:read", "memory-map", 0);
9112 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
9113 "qXfer:spu:read", "read-spu-object", 0);
9115 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
9116 "qXfer:spu:write", "write-spu-object", 0);
9118 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
9119 "qXfer:osdata:read", "osdata", 0);
9121 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
9122 "qXfer:siginfo:read", "read-siginfo-object", 0);
9124 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
9125 "qXfer:siginfo:write", "write-siginfo-object", 0);
9127 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
9128 "qGetTLSAddr", "get-thread-local-storage-address",
9131 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
9132 "qSupported", "supported-packets", 0);
9134 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
9135 "qSearch:memory", "search-memory", 0);
9137 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
9138 "vFile:open", "hostio-open", 0);
9140 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
9141 "vFile:pread", "hostio-pread", 0);
9143 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
9144 "vFile:pwrite", "hostio-pwrite", 0);
9146 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
9147 "vFile:close", "hostio-close", 0);
9149 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
9150 "vFile:unlink", "hostio-unlink", 0);
9152 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
9153 "vAttach", "attach", 0);
9155 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
9158 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
9159 "QStartNoAckMode", "noack", 0);
9161 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
9162 "vKill", "kill", 0);
9164 /* Keep the old ``set remote Z-packet ...'' working. Each individual
9165 Z sub-packet has its own set and show commands, but users may
9166 have sets to this variable in their .gdbinit files (or in their
9168 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
9169 &remote_Z_packet_detect
, _("\
9170 Set use of remote protocol `Z' packets"), _("\
9171 Show use of remote protocol `Z' packets "), _("\
9172 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
9174 set_remote_protocol_Z_packet_cmd
,
9175 show_remote_protocol_Z_packet_cmd
, /* FIXME: i18n: Use of remote protocol `Z' packets is %s. */
9176 &remote_set_cmdlist
, &remote_show_cmdlist
);
9178 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
9179 Manipulate files on the remote system\n\
9180 Transfer files to and from the remote target system."),
9181 &remote_cmdlist
, "remote ",
9182 0 /* allow-unknown */, &cmdlist
);
9184 add_cmd ("put", class_files
, remote_put_command
,
9185 _("Copy a local file to the remote system."),
9188 add_cmd ("get", class_files
, remote_get_command
,
9189 _("Copy a remote file to the local system."),
9192 add_cmd ("delete", class_files
, remote_delete_command
,
9193 _("Delete a remote file."),
9196 remote_exec_file
= xstrdup ("");
9197 add_setshow_string_noescape_cmd ("exec-file", class_files
,
9198 &remote_exec_file
, _("\
9199 Set the remote pathname for \"run\""), _("\
9200 Show the remote pathname for \"run\""), NULL
, NULL
, NULL
,
9201 &remote_set_cmdlist
, &remote_show_cmdlist
);
9203 /* Eventually initialize fileio. See fileio.c */
9204 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
9206 /* Take advantage of the fact that the LWP field is not used, to tag
9207 special ptids with it set to != 0. */
9208 magic_null_ptid
= ptid_build (42000, 1, -1);
9209 not_sent_ptid
= ptid_build (42000, 1, -2);
9210 any_thread_ptid
= ptid_build (42000, 1, 0);