1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 /*#include "terminal.h" */
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
39 #include "observable.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "filestuff.h"
50 #include "gdb_sys_time.h"
52 #include "event-loop.h"
53 #include "event-top.h"
59 #include "gdbcore.h" /* for exec_bfd */
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
73 #include "record-btrace.h"
75 #include "common/scoped_restore.h"
77 #include "common/byte-vector.h"
79 /* Per-program-space data key. */
80 static const struct program_space_data
*remote_pspace_data
;
82 /* The variable registered as the control variable used by the
83 remote exec-file commands. While the remote exec-file setting is
84 per-program-space, the set/show machinery uses this as the
85 location of the remote exec-file value. */
86 static char *remote_exec_file_var
;
88 /* The size to align memory write packets, when practical. The protocol
89 does not guarantee any alignment, and gdb will generate short
90 writes and unaligned writes, but even as a best-effort attempt this
91 can improve bulk transfers. For instance, if a write is misaligned
92 relative to the target's data bus, the stub may need to make an extra
93 round trip fetching data from the target. This doesn't make a
94 huge difference, but it's easy to do, so we try to be helpful.
96 The alignment chosen is arbitrary; usually data bus width is
97 important here, not the possibly larger cache line size. */
98 enum { REMOTE_ALIGN_WRITES
= 16 };
100 /* Prototypes for local functions. */
101 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
102 static int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
,
103 int forever
, int *is_notif
);
105 static void remote_files_info (struct target_ops
*ignore
);
107 static void remote_prepare_to_store (struct target_ops
*self
,
108 struct regcache
*regcache
);
110 static void remote_open_1 (const char *, int, struct target_ops
*,
113 static void remote_close (struct target_ops
*self
);
117 static int remote_vkill (int pid
, struct remote_state
*rs
);
119 static void remote_kill_k (void);
121 static void remote_mourn (struct target_ops
*ops
);
123 static void extended_remote_restart (void);
125 static void remote_send (char **buf
, long *sizeof_buf_p
);
127 static int readchar (int timeout
);
129 static void remote_serial_write (const char *str
, int len
);
131 static void remote_kill (struct target_ops
*ops
);
133 static int remote_can_async_p (struct target_ops
*);
135 static int remote_is_async_p (struct target_ops
*);
137 static void remote_async (struct target_ops
*ops
, int enable
);
139 static void remote_thread_events (struct target_ops
*ops
, int enable
);
141 static void interrupt_query (void);
143 static void set_general_thread (ptid_t ptid
);
144 static void set_continue_thread (ptid_t ptid
);
146 static void get_offsets (void);
148 static void skip_frame (void);
150 static long read_frame (char **buf_p
, long *sizeof_buf
);
152 static int hexnumlen (ULONGEST num
);
154 static void init_remote_ops (void);
156 static void init_extended_remote_ops (void);
158 static void remote_stop (struct target_ops
*self
, ptid_t
);
160 static int stubhex (int ch
);
162 static int hexnumstr (char *, ULONGEST
);
164 static int hexnumnstr (char *, ULONGEST
, int);
166 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
168 static void print_packet (const char *);
170 static int stub_unpack_int (char *buff
, int fieldlength
);
172 static ptid_t
remote_current_thread (ptid_t oldptid
);
174 static int putpkt_binary (const char *buf
, int cnt
);
176 static void check_binary_download (CORE_ADDR addr
);
178 struct packet_config
;
180 static void show_packet_config_cmd (struct packet_config
*config
);
182 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
184 struct cmd_list_element
*c
,
187 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
188 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
190 static void remote_set_permissions (struct target_ops
*self
);
192 static int remote_get_trace_status (struct target_ops
*self
,
193 struct trace_status
*ts
);
195 static int remote_upload_tracepoints (struct target_ops
*self
,
196 struct uploaded_tp
**utpp
);
198 static int remote_upload_trace_state_variables (struct target_ops
*self
,
199 struct uploaded_tsv
**utsvp
);
201 static void remote_query_supported (void);
203 static void remote_check_symbols (void);
206 static void stop_reply_xfree (struct stop_reply
*);
207 static void remote_parse_stop_reply (char *, struct stop_reply
*);
208 static void push_stop_reply (struct stop_reply
*);
209 static void discard_pending_stop_replies_in_queue (struct remote_state
*);
210 static int peek_stop_reply (ptid_t ptid
);
212 struct threads_listing_context
;
213 static void remove_new_fork_children (struct threads_listing_context
*);
215 static void remote_async_inferior_event_handler (gdb_client_data
);
217 static void remote_terminal_ours (struct target_ops
*self
);
219 static int remote_read_description_p (struct target_ops
*target
);
221 static void remote_console_output (char *msg
);
223 static int remote_supports_cond_breakpoints (struct target_ops
*self
);
225 static int remote_can_run_breakpoint_commands (struct target_ops
*self
);
227 static void remote_btrace_reset (void);
229 static void remote_btrace_maybe_reopen (void);
231 static int stop_reply_queue_length (void);
233 static void readahead_cache_invalidate (void);
235 static void remote_unpush_and_throw (void);
237 static struct remote_state
*get_remote_state (void);
241 static struct cmd_list_element
*remote_cmdlist
;
243 /* For "set remote" and "show remote". */
245 static struct cmd_list_element
*remote_set_cmdlist
;
246 static struct cmd_list_element
*remote_show_cmdlist
;
248 /* Stub vCont actions support.
250 Each field is a boolean flag indicating whether the stub reports
251 support for the corresponding action. */
253 struct vCont_action_support
268 /* Controls whether GDB is willing to use range stepping. */
270 static int use_range_stepping
= 1;
272 #define OPAQUETHREADBYTES 8
274 /* a 64 bit opaque identifier */
275 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
277 /* About this many threadisds fit in a packet. */
279 #define MAXTHREADLISTRESULTS 32
281 /* The max number of chars in debug output. The rest of chars are
284 #define REMOTE_DEBUG_MAX_CHAR 512
286 /* Data for the vFile:pread readahead cache. */
288 struct readahead_cache
290 /* The file descriptor for the file that is being cached. -1 if the
294 /* The offset into the file that the cache buffer corresponds
298 /* The buffer holding the cache contents. */
300 /* The buffer's size. We try to read as much as fits into a packet
304 /* Cache hit and miss counters. */
309 /* Description of the remote protocol state for the currently
310 connected target. This is per-target state, and independent of the
311 selected architecture. */
315 /* A buffer to use for incoming packets, and its current size. The
316 buffer is grown dynamically for larger incoming packets.
317 Outgoing packets may also be constructed in this buffer.
318 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
319 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
324 /* True if we're going through initial connection setup (finding out
325 about the remote side's threads, relocating symbols, etc.). */
328 /* If we negotiated packet size explicitly (and thus can bypass
329 heuristics for the largest packet size that will not overflow
330 a buffer in the stub), this will be set to that packet size.
331 Otherwise zero, meaning to use the guessed size. */
332 long explicit_packet_size
;
334 /* remote_wait is normally called when the target is running and
335 waits for a stop reply packet. But sometimes we need to call it
336 when the target is already stopped. We can send a "?" packet
337 and have remote_wait read the response. Or, if we already have
338 the response, we can stash it in BUF and tell remote_wait to
339 skip calling getpkt. This flag is set when BUF contains a
340 stop reply packet and the target is not waiting. */
341 int cached_wait_status
;
343 /* True, if in no ack mode. That is, neither GDB nor the stub will
344 expect acks from each other. The connection is assumed to be
348 /* True if we're connected in extended remote mode. */
351 /* True if we resumed the target and we're waiting for the target to
352 stop. In the mean time, we can't start another command/query.
353 The remote server wouldn't be ready to process it, so we'd
354 timeout waiting for a reply that would never come and eventually
355 we'd close the connection. This can happen in asynchronous mode
356 because we allow GDB commands while the target is running. */
357 int waiting_for_stop_reply
;
359 /* The status of the stub support for the various vCont actions. */
360 struct vCont_action_support supports_vCont
;
362 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
363 responded to that. */
366 /* True if we saw a Ctrl-C while reading or writing from/to the
367 remote descriptor. At that point it is not safe to send a remote
368 interrupt packet, so we instead remember we saw the Ctrl-C and
369 process it once we're done with sending/receiving the current
370 packet, which should be shortly. If however that takes too long,
371 and the user presses Ctrl-C again, we offer to disconnect. */
372 int got_ctrlc_during_io
;
374 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
375 remote_open knows that we don't have a file open when the program
377 struct serial
*remote_desc
;
379 /* These are the threads which we last sent to the remote system. The
380 TID member will be -1 for all or -2 for not sent yet. */
381 ptid_t general_thread
;
382 ptid_t continue_thread
;
384 /* This is the traceframe which we last selected on the remote system.
385 It will be -1 if no traceframe is selected. */
386 int remote_traceframe_number
;
388 char *last_pass_packet
;
390 /* The last QProgramSignals packet sent to the target. We bypass
391 sending a new program signals list down to the target if the new
392 packet is exactly the same as the last we sent. IOW, we only let
393 the target know about program signals list changes. */
394 char *last_program_signals_packet
;
396 enum gdb_signal last_sent_signal
;
400 /* The execution direction of the last resume we got. */
401 enum exec_direction_kind last_resume_exec_dir
;
403 char *finished_object
;
404 char *finished_annex
;
405 ULONGEST finished_offset
;
407 /* Should we try the 'ThreadInfo' query packet?
409 This variable (NOT available to the user: auto-detect only!)
410 determines whether GDB will use the new, simpler "ThreadInfo"
411 query or the older, more complex syntax for thread queries.
412 This is an auto-detect variable (set to true at each connect,
413 and set to false when the target fails to recognize it). */
414 int use_threadinfo_query
;
415 int use_threadextra_query
;
417 threadref echo_nextthread
;
418 threadref nextthread
;
419 threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
421 /* The state of remote notification. */
422 struct remote_notif_state
*notif_state
;
424 /* The branch trace configuration. */
425 struct btrace_config btrace_config
;
427 /* The argument to the last "vFile:setfs:" packet we sent, used
428 to avoid sending repeated unnecessary "vFile:setfs:" packets.
429 Initialized to -1 to indicate that no "vFile:setfs:" packet
430 has yet been sent. */
433 /* A readahead cache for vFile:pread. Often, reading a binary
434 involves a sequence of small reads. E.g., when parsing an ELF
435 file. A readahead cache helps mostly the case of remote
436 debugging on a connection with higher latency, due to the
437 request/reply nature of the RSP. We only cache data for a single
438 file descriptor at a time. */
439 struct readahead_cache readahead_cache
;
442 /* Private data that we'll store in (struct thread_info)->priv. */
443 struct remote_thread_info
: public private_thread_info
449 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
450 sequence of bytes. */
451 gdb::byte_vector thread_handle
;
453 /* Whether the target stopped for a breakpoint/watchpoint. */
454 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
456 /* This is set to the data address of the access causing the target
457 to stop for a watchpoint. */
458 CORE_ADDR watch_data_address
= 0;
460 /* Fields used by the vCont action coalescing implemented in
461 remote_resume / remote_commit_resume. remote_resume stores each
462 thread's last resume request in these fields, so that a later
463 remote_commit_resume knows which is the proper action for this
464 thread to include in the vCont packet. */
466 /* True if the last target_resume call for this thread was a step
467 request, false if a continue request. */
468 int last_resume_step
= 0;
470 /* The signal specified in the last target_resume call for this
472 gdb_signal last_resume_sig
= GDB_SIGNAL_0
;
474 /* Whether this thread was already vCont-resumed on the remote
476 int vcont_resumed
= 0;
479 /* This data could be associated with a target, but we do not always
480 have access to the current target when we need it, so for now it is
481 static. This will be fine for as long as only one target is in use
483 static struct remote_state
*remote_state
;
485 static struct remote_state
*
486 get_remote_state_raw (void)
491 /* Allocate a new struct remote_state with xmalloc, initialize it, and
494 static struct remote_state
*
495 new_remote_state (void)
497 struct remote_state
*result
= XCNEW (struct remote_state
);
499 /* The default buffer size is unimportant; it will be expanded
500 whenever a larger buffer is needed. */
501 result
->buf_size
= 400;
502 result
->buf
= (char *) xmalloc (result
->buf_size
);
503 result
->remote_traceframe_number
= -1;
504 result
->last_sent_signal
= GDB_SIGNAL_0
;
505 result
->last_resume_exec_dir
= EXEC_FORWARD
;
511 /* Description of the remote protocol for a given architecture. */
515 long offset
; /* Offset into G packet. */
516 long regnum
; /* GDB's internal register number. */
517 LONGEST pnum
; /* Remote protocol register number. */
518 int in_g_packet
; /* Always part of G packet. */
519 /* long size in bytes; == register_size (target_gdbarch (), regnum);
521 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
525 struct remote_arch_state
527 /* Description of the remote protocol registers. */
528 long sizeof_g_packet
;
530 /* Description of the remote protocol registers indexed by REGNUM
531 (making an array gdbarch_num_regs in size). */
532 struct packet_reg
*regs
;
534 /* This is the size (in chars) of the first response to the ``g''
535 packet. It is used as a heuristic when determining the maximum
536 size of memory-read and memory-write packets. A target will
537 typically only reserve a buffer large enough to hold the ``g''
538 packet. The size does not include packet overhead (headers and
540 long actual_register_packet_size
;
542 /* This is the maximum size (in chars) of a non read/write packet.
543 It is also used as a cap on the size of read/write packets. */
544 long remote_packet_size
;
547 /* Utility: generate error from an incoming stub packet. */
549 trace_error (char *buf
)
552 return; /* not an error msg */
555 case '1': /* malformed packet error */
556 if (*++buf
== '0') /* general case: */
557 error (_("remote.c: error in outgoing packet."));
559 error (_("remote.c: error in outgoing packet at field #%ld."),
560 strtol (buf
, NULL
, 16));
562 error (_("Target returns error code '%s'."), buf
);
566 /* Utility: wait for reply from stub, while accepting "O" packets. */
569 remote_get_noisy_reply ()
571 struct remote_state
*rs
= get_remote_state ();
573 do /* Loop on reply from remote stub. */
577 QUIT
; /* Allow user to bail out with ^C. */
578 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
582 else if (startswith (buf
, "qRelocInsn:"))
585 CORE_ADDR from
, to
, org_to
;
587 int adjusted_size
= 0;
590 p
= buf
+ strlen ("qRelocInsn:");
591 pp
= unpack_varlen_hex (p
, &ul
);
593 error (_("invalid qRelocInsn packet: %s"), buf
);
597 unpack_varlen_hex (p
, &ul
);
604 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
607 CATCH (ex
, RETURN_MASK_ALL
)
609 if (ex
.error
== MEMORY_ERROR
)
611 /* Propagate memory errors silently back to the
612 target. The stub may have limited the range of
613 addresses we can write to, for example. */
617 /* Something unexpectedly bad happened. Be verbose
618 so we can tell what, and propagate the error back
619 to the stub, so it doesn't get stuck waiting for
621 exception_fprintf (gdb_stderr
, ex
,
622 _("warning: relocating instruction: "));
630 adjusted_size
= to
- org_to
;
632 xsnprintf (buf
, rs
->buf_size
, "qRelocInsn:%x", adjusted_size
);
636 else if (buf
[0] == 'O' && buf
[1] != 'K')
637 remote_console_output (buf
+ 1); /* 'O' message from stub */
639 return buf
; /* Here's the actual reply. */
644 /* Handle for retreving the remote protocol data from gdbarch. */
645 static struct gdbarch_data
*remote_gdbarch_data_handle
;
647 static struct remote_arch_state
*
648 get_remote_arch_state (struct gdbarch
*gdbarch
)
650 gdb_assert (gdbarch
!= NULL
);
651 return ((struct remote_arch_state
*)
652 gdbarch_data (gdbarch
, remote_gdbarch_data_handle
));
655 /* Fetch the global remote target state. */
657 static struct remote_state
*
658 get_remote_state (void)
660 /* Make sure that the remote architecture state has been
661 initialized, because doing so might reallocate rs->buf. Any
662 function which calls getpkt also needs to be mindful of changes
663 to rs->buf, but this call limits the number of places which run
665 get_remote_arch_state (target_gdbarch ());
667 return get_remote_state_raw ();
670 /* Cleanup routine for the remote module's pspace data. */
673 remote_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
675 char *remote_exec_file
= (char *) arg
;
677 xfree (remote_exec_file
);
680 /* Fetch the remote exec-file from the current program space. */
683 get_remote_exec_file (void)
685 char *remote_exec_file
;
688 = (char *) program_space_data (current_program_space
,
690 if (remote_exec_file
== NULL
)
693 return remote_exec_file
;
696 /* Set the remote exec file for PSPACE. */
699 set_pspace_remote_exec_file (struct program_space
*pspace
,
700 char *remote_exec_file
)
702 char *old_file
= (char *) program_space_data (pspace
, remote_pspace_data
);
705 set_program_space_data (pspace
, remote_pspace_data
,
706 xstrdup (remote_exec_file
));
709 /* The "set/show remote exec-file" set command hook. */
712 set_remote_exec_file (const char *ignored
, int from_tty
,
713 struct cmd_list_element
*c
)
715 gdb_assert (remote_exec_file_var
!= NULL
);
716 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
719 /* The "set/show remote exec-file" show command hook. */
722 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
723 struct cmd_list_element
*cmd
, const char *value
)
725 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
729 compare_pnums (const void *lhs_
, const void *rhs_
)
731 const struct packet_reg
* const *lhs
732 = (const struct packet_reg
* const *) lhs_
;
733 const struct packet_reg
* const *rhs
734 = (const struct packet_reg
* const *) rhs_
;
736 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
738 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
745 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
747 int regnum
, num_remote_regs
, offset
;
748 struct packet_reg
**remote_regs
;
750 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
752 struct packet_reg
*r
= ®s
[regnum
];
754 if (register_size (gdbarch
, regnum
) == 0)
755 /* Do not try to fetch zero-sized (placeholder) registers. */
758 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
763 /* Define the g/G packet format as the contents of each register
764 with a remote protocol number, in order of ascending protocol
767 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
768 for (num_remote_regs
= 0, regnum
= 0;
769 regnum
< gdbarch_num_regs (gdbarch
);
771 if (regs
[regnum
].pnum
!= -1)
772 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
774 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
777 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
779 remote_regs
[regnum
]->in_g_packet
= 1;
780 remote_regs
[regnum
]->offset
= offset
;
781 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
787 /* Given the architecture described by GDBARCH, return the remote
788 protocol register's number and the register's offset in the g/G
789 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
790 If the target does not have a mapping for REGNUM, return false,
791 otherwise, return true. */
794 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
795 int *pnum
, int *poffset
)
797 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
799 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
801 map_regcache_remote_table (gdbarch
, regs
.data ());
803 *pnum
= regs
[regnum
].pnum
;
804 *poffset
= regs
[regnum
].offset
;
810 init_remote_state (struct gdbarch
*gdbarch
)
812 struct remote_state
*rs
= get_remote_state_raw ();
813 struct remote_arch_state
*rsa
;
815 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
817 /* Use the architecture to build a regnum<->pnum table, which will be
818 1:1 unless a feature set specifies otherwise. */
819 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
820 gdbarch_num_regs (gdbarch
),
823 /* Record the maximum possible size of the g packet - it may turn out
825 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
827 /* Default maximum number of characters in a packet body. Many
828 remote stubs have a hardwired buffer size of 400 bytes
829 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
830 as the maximum packet-size to ensure that the packet and an extra
831 NUL character can always fit in the buffer. This stops GDB
832 trashing stubs that try to squeeze an extra NUL into what is
833 already a full buffer (As of 1999-12-04 that was most stubs). */
834 rsa
->remote_packet_size
= 400 - 1;
836 /* This one is filled in when a ``g'' packet is received. */
837 rsa
->actual_register_packet_size
= 0;
839 /* Should rsa->sizeof_g_packet needs more space than the
840 default, adjust the size accordingly. Remember that each byte is
841 encoded as two characters. 32 is the overhead for the packet
842 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
843 (``$NN:G...#NN'') is a better guess, the below has been padded a
845 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
846 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
848 /* Make sure that the packet buffer is plenty big enough for
849 this architecture. */
850 if (rs
->buf_size
< rsa
->remote_packet_size
)
852 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
853 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
859 /* Return the current allowed size of a remote packet. This is
860 inferred from the current architecture, and should be used to
861 limit the length of outgoing packets. */
863 get_remote_packet_size (void)
865 struct remote_state
*rs
= get_remote_state ();
866 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
868 if (rs
->explicit_packet_size
)
869 return rs
->explicit_packet_size
;
871 return rsa
->remote_packet_size
;
874 static struct packet_reg
*
875 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
878 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
882 struct packet_reg
*r
= &rsa
->regs
[regnum
];
884 gdb_assert (r
->regnum
== regnum
);
889 static struct packet_reg
*
890 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
895 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
897 struct packet_reg
*r
= &rsa
->regs
[i
];
905 static struct target_ops remote_ops
;
907 static struct target_ops extended_remote_ops
;
909 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
910 ``forever'' still use the normal timeout mechanism. This is
911 currently used by the ASYNC code to guarentee that target reads
912 during the initial connect always time-out. Once getpkt has been
913 modified to return a timeout indication and, in turn
914 remote_wait()/wait_for_inferior() have gained a timeout parameter
916 static int wait_forever_enabled_p
= 1;
918 /* Allow the user to specify what sequence to send to the remote
919 when he requests a program interruption: Although ^C is usually
920 what remote systems expect (this is the default, here), it is
921 sometimes preferable to send a break. On other systems such
922 as the Linux kernel, a break followed by g, which is Magic SysRq g
923 is required in order to interrupt the execution. */
924 const char interrupt_sequence_control_c
[] = "Ctrl-C";
925 const char interrupt_sequence_break
[] = "BREAK";
926 const char interrupt_sequence_break_g
[] = "BREAK-g";
927 static const char *const interrupt_sequence_modes
[] =
929 interrupt_sequence_control_c
,
930 interrupt_sequence_break
,
931 interrupt_sequence_break_g
,
934 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
937 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
938 struct cmd_list_element
*c
,
941 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
942 fprintf_filtered (file
,
943 _("Send the ASCII ETX character (Ctrl-c) "
944 "to the remote target to interrupt the "
945 "execution of the program.\n"));
946 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
947 fprintf_filtered (file
,
948 _("send a break signal to the remote target "
949 "to interrupt the execution of the program.\n"));
950 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
951 fprintf_filtered (file
,
952 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
953 "the remote target to interrupt the execution "
954 "of Linux kernel.\n"));
956 internal_error (__FILE__
, __LINE__
,
957 _("Invalid value for interrupt_sequence_mode: %s."),
958 interrupt_sequence_mode
);
961 /* This boolean variable specifies whether interrupt_sequence is sent
962 to the remote target when gdb connects to it.
963 This is mostly needed when you debug the Linux kernel: The Linux kernel
964 expects BREAK g which is Magic SysRq g for connecting gdb. */
965 static int interrupt_on_connect
= 0;
967 /* This variable is used to implement the "set/show remotebreak" commands.
968 Since these commands are now deprecated in favor of "set/show remote
969 interrupt-sequence", it no longer has any effect on the code. */
970 static int remote_break
;
973 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
976 interrupt_sequence_mode
= interrupt_sequence_break
;
978 interrupt_sequence_mode
= interrupt_sequence_control_c
;
982 show_remotebreak (struct ui_file
*file
, int from_tty
,
983 struct cmd_list_element
*c
,
988 /* This variable sets the number of bits in an address that are to be
989 sent in a memory ("M" or "m") packet. Normally, after stripping
990 leading zeros, the entire address would be sent. This variable
991 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
992 initial implementation of remote.c restricted the address sent in
993 memory packets to ``host::sizeof long'' bytes - (typically 32
994 bits). Consequently, for 64 bit targets, the upper 32 bits of an
995 address was never sent. Since fixing this bug may cause a break in
996 some remote targets this variable is principly provided to
997 facilitate backward compatibility. */
999 static unsigned int remote_address_size
;
1002 /* User configurable variables for the number of characters in a
1003 memory read/write packet. MIN (rsa->remote_packet_size,
1004 rsa->sizeof_g_packet) is the default. Some targets need smaller
1005 values (fifo overruns, et.al.) and some users need larger values
1006 (speed up transfers). The variables ``preferred_*'' (the user
1007 request), ``current_*'' (what was actually set) and ``forced_*''
1008 (Positive - a soft limit, negative - a hard limit). */
1010 struct memory_packet_config
1017 /* The default max memory-write-packet-size. The 16k is historical.
1018 (It came from older GDB's using alloca for buffers and the
1019 knowledge (folklore?) that some hosts don't cope very well with
1020 large alloca calls.) */
1021 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1023 /* The minimum remote packet size for memory transfers. Ensures we
1024 can write at least one byte. */
1025 #define MIN_MEMORY_PACKET_SIZE 20
1027 /* Compute the current size of a read/write packet. Since this makes
1028 use of ``actual_register_packet_size'' the computation is dynamic. */
1031 get_memory_packet_size (struct memory_packet_config
*config
)
1033 struct remote_state
*rs
= get_remote_state ();
1034 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
1037 if (config
->fixed_p
)
1039 if (config
->size
<= 0)
1040 what_they_get
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1042 what_they_get
= config
->size
;
1046 what_they_get
= get_remote_packet_size ();
1047 /* Limit the packet to the size specified by the user. */
1048 if (config
->size
> 0
1049 && what_they_get
> config
->size
)
1050 what_they_get
= config
->size
;
1052 /* Limit it to the size of the targets ``g'' response unless we have
1053 permission from the stub to use a larger packet size. */
1054 if (rs
->explicit_packet_size
== 0
1055 && rsa
->actual_register_packet_size
> 0
1056 && what_they_get
> rsa
->actual_register_packet_size
)
1057 what_they_get
= rsa
->actual_register_packet_size
;
1059 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1060 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1062 /* Make sure there is room in the global buffer for this packet
1063 (including its trailing NUL byte). */
1064 if (rs
->buf_size
< what_they_get
+ 1)
1066 rs
->buf_size
= 2 * what_they_get
;
1067 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1070 return what_they_get
;
1073 /* Update the size of a read/write packet. If they user wants
1074 something really big then do a sanity check. */
1077 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1079 int fixed_p
= config
->fixed_p
;
1080 long size
= config
->size
;
1083 error (_("Argument required (integer, `fixed' or `limited')."));
1084 else if (strcmp (args
, "hard") == 0
1085 || strcmp (args
, "fixed") == 0)
1087 else if (strcmp (args
, "soft") == 0
1088 || strcmp (args
, "limit") == 0)
1094 size
= strtoul (args
, &end
, 0);
1096 error (_("Invalid %s (bad syntax)."), config
->name
);
1098 /* Instead of explicitly capping the size of a packet to or
1099 disallowing it, the user is allowed to set the size to
1100 something arbitrarily large. */
1103 /* So that the query shows the correct value. */
1105 size
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1108 if (fixed_p
&& !config
->fixed_p
)
1110 if (! query (_("The target may not be able to correctly handle a %s\n"
1111 "of %ld bytes. Change the packet size? "),
1112 config
->name
, size
))
1113 error (_("Packet size not changed."));
1115 /* Update the config. */
1116 config
->fixed_p
= fixed_p
;
1117 config
->size
= size
;
1121 show_memory_packet_size (struct memory_packet_config
*config
)
1123 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1124 if (config
->fixed_p
)
1125 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1126 get_memory_packet_size (config
));
1128 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1129 get_memory_packet_size (config
));
1132 static struct memory_packet_config memory_write_packet_config
=
1134 "memory-write-packet-size",
1138 set_memory_write_packet_size (const char *args
, int from_tty
)
1140 set_memory_packet_size (args
, &memory_write_packet_config
);
1144 show_memory_write_packet_size (const char *args
, int from_tty
)
1146 show_memory_packet_size (&memory_write_packet_config
);
1150 get_memory_write_packet_size (void)
1152 return get_memory_packet_size (&memory_write_packet_config
);
1155 static struct memory_packet_config memory_read_packet_config
=
1157 "memory-read-packet-size",
1161 set_memory_read_packet_size (const char *args
, int from_tty
)
1163 set_memory_packet_size (args
, &memory_read_packet_config
);
1167 show_memory_read_packet_size (const char *args
, int from_tty
)
1169 show_memory_packet_size (&memory_read_packet_config
);
1173 get_memory_read_packet_size (void)
1175 long size
= get_memory_packet_size (&memory_read_packet_config
);
1177 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1178 extra buffer size argument before the memory read size can be
1179 increased beyond this. */
1180 if (size
> get_remote_packet_size ())
1181 size
= get_remote_packet_size ();
1186 /* Generic configuration support for packets the stub optionally
1187 supports. Allows the user to specify the use of the packet as well
1188 as allowing GDB to auto-detect support in the remote stub. */
1192 PACKET_SUPPORT_UNKNOWN
= 0,
1197 struct packet_config
1202 /* If auto, GDB auto-detects support for this packet or feature,
1203 either through qSupported, or by trying the packet and looking
1204 at the response. If true, GDB assumes the target supports this
1205 packet. If false, the packet is disabled. Configs that don't
1206 have an associated command always have this set to auto. */
1207 enum auto_boolean detect
;
1209 /* Does the target support this packet? */
1210 enum packet_support support
;
1213 /* Analyze a packet's return value and update the packet config
1223 static enum packet_support
packet_config_support (struct packet_config
*config
);
1224 static enum packet_support
packet_support (int packet
);
1227 show_packet_config_cmd (struct packet_config
*config
)
1229 const char *support
= "internal-error";
1231 switch (packet_config_support (config
))
1234 support
= "enabled";
1236 case PACKET_DISABLE
:
1237 support
= "disabled";
1239 case PACKET_SUPPORT_UNKNOWN
:
1240 support
= "unknown";
1243 switch (config
->detect
)
1245 case AUTO_BOOLEAN_AUTO
:
1246 printf_filtered (_("Support for the `%s' packet "
1247 "is auto-detected, currently %s.\n"),
1248 config
->name
, support
);
1250 case AUTO_BOOLEAN_TRUE
:
1251 case AUTO_BOOLEAN_FALSE
:
1252 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1253 config
->name
, support
);
1259 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1260 const char *title
, int legacy
)
1266 config
->name
= name
;
1267 config
->title
= title
;
1268 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1270 show_doc
= xstrprintf ("Show current use of remote "
1271 "protocol `%s' (%s) packet",
1273 /* set/show TITLE-packet {auto,on,off} */
1274 cmd_name
= xstrprintf ("%s-packet", title
);
1275 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1276 &config
->detect
, set_doc
,
1277 show_doc
, NULL
, /* help_doc */
1279 show_remote_protocol_packet_cmd
,
1280 &remote_set_cmdlist
, &remote_show_cmdlist
);
1281 /* The command code copies the documentation strings. */
1284 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1289 legacy_name
= xstrprintf ("%s-packet", name
);
1290 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1291 &remote_set_cmdlist
);
1292 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1293 &remote_show_cmdlist
);
1297 static enum packet_result
1298 packet_check_result (const char *buf
)
1302 /* The stub recognized the packet request. Check that the
1303 operation succeeded. */
1305 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1307 /* "Enn" - definitly an error. */
1308 return PACKET_ERROR
;
1310 /* Always treat "E." as an error. This will be used for
1311 more verbose error messages, such as E.memtypes. */
1312 if (buf
[0] == 'E' && buf
[1] == '.')
1313 return PACKET_ERROR
;
1315 /* The packet may or may not be OK. Just assume it is. */
1319 /* The stub does not support the packet. */
1320 return PACKET_UNKNOWN
;
1323 static enum packet_result
1324 packet_ok (const char *buf
, struct packet_config
*config
)
1326 enum packet_result result
;
1328 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1329 && config
->support
== PACKET_DISABLE
)
1330 internal_error (__FILE__
, __LINE__
,
1331 _("packet_ok: attempt to use a disabled packet"));
1333 result
= packet_check_result (buf
);
1338 /* The stub recognized the packet request. */
1339 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1342 fprintf_unfiltered (gdb_stdlog
,
1343 "Packet %s (%s) is supported\n",
1344 config
->name
, config
->title
);
1345 config
->support
= PACKET_ENABLE
;
1348 case PACKET_UNKNOWN
:
1349 /* The stub does not support the packet. */
1350 if (config
->detect
== AUTO_BOOLEAN_AUTO
1351 && config
->support
== PACKET_ENABLE
)
1353 /* If the stub previously indicated that the packet was
1354 supported then there is a protocol error. */
1355 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1356 config
->name
, config
->title
);
1358 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1360 /* The user set it wrong. */
1361 error (_("Enabled packet %s (%s) not recognized by stub"),
1362 config
->name
, config
->title
);
1366 fprintf_unfiltered (gdb_stdlog
,
1367 "Packet %s (%s) is NOT supported\n",
1368 config
->name
, config
->title
);
1369 config
->support
= PACKET_DISABLE
;
1390 PACKET_vFile_pwrite
,
1392 PACKET_vFile_unlink
,
1393 PACKET_vFile_readlink
,
1396 PACKET_qXfer_features
,
1397 PACKET_qXfer_exec_file
,
1398 PACKET_qXfer_libraries
,
1399 PACKET_qXfer_libraries_svr4
,
1400 PACKET_qXfer_memory_map
,
1401 PACKET_qXfer_spu_read
,
1402 PACKET_qXfer_spu_write
,
1403 PACKET_qXfer_osdata
,
1404 PACKET_qXfer_threads
,
1405 PACKET_qXfer_statictrace_read
,
1406 PACKET_qXfer_traceframe_info
,
1412 PACKET_QPassSignals
,
1413 PACKET_QCatchSyscalls
,
1414 PACKET_QProgramSignals
,
1415 PACKET_QSetWorkingDir
,
1416 PACKET_QStartupWithShell
,
1417 PACKET_QEnvironmentHexEncoded
,
1418 PACKET_QEnvironmentReset
,
1419 PACKET_QEnvironmentUnset
,
1421 PACKET_qSearch_memory
,
1424 PACKET_QStartNoAckMode
,
1426 PACKET_qXfer_siginfo_read
,
1427 PACKET_qXfer_siginfo_write
,
1430 /* Support for conditional tracepoints. */
1431 PACKET_ConditionalTracepoints
,
1433 /* Support for target-side breakpoint conditions. */
1434 PACKET_ConditionalBreakpoints
,
1436 /* Support for target-side breakpoint commands. */
1437 PACKET_BreakpointCommands
,
1439 /* Support for fast tracepoints. */
1440 PACKET_FastTracepoints
,
1442 /* Support for static tracepoints. */
1443 PACKET_StaticTracepoints
,
1445 /* Support for installing tracepoints while a trace experiment is
1447 PACKET_InstallInTrace
,
1451 PACKET_TracepointSource
,
1454 PACKET_QDisableRandomization
,
1456 PACKET_QTBuffer_size
,
1460 PACKET_qXfer_btrace
,
1462 /* Support for the QNonStop packet. */
1465 /* Support for the QThreadEvents packet. */
1466 PACKET_QThreadEvents
,
1468 /* Support for multi-process extensions. */
1469 PACKET_multiprocess_feature
,
1471 /* Support for enabling and disabling tracepoints while a trace
1472 experiment is running. */
1473 PACKET_EnableDisableTracepoints_feature
,
1475 /* Support for collecting strings using the tracenz bytecode. */
1476 PACKET_tracenz_feature
,
1478 /* Support for continuing to run a trace experiment while GDB is
1480 PACKET_DisconnectedTracing_feature
,
1482 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1483 PACKET_augmented_libraries_svr4_read_feature
,
1485 /* Support for the qXfer:btrace-conf:read packet. */
1486 PACKET_qXfer_btrace_conf
,
1488 /* Support for the Qbtrace-conf:bts:size packet. */
1489 PACKET_Qbtrace_conf_bts_size
,
1491 /* Support for swbreak+ feature. */
1492 PACKET_swbreak_feature
,
1494 /* Support for hwbreak+ feature. */
1495 PACKET_hwbreak_feature
,
1497 /* Support for fork events. */
1498 PACKET_fork_event_feature
,
1500 /* Support for vfork events. */
1501 PACKET_vfork_event_feature
,
1503 /* Support for the Qbtrace-conf:pt:size packet. */
1504 PACKET_Qbtrace_conf_pt_size
,
1506 /* Support for exec events. */
1507 PACKET_exec_event_feature
,
1509 /* Support for query supported vCont actions. */
1510 PACKET_vContSupported
,
1512 /* Support remote CTRL-C. */
1515 /* Support TARGET_WAITKIND_NO_RESUMED. */
1521 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1523 /* Returns the packet's corresponding "set remote foo-packet" command
1524 state. See struct packet_config for more details. */
1526 static enum auto_boolean
1527 packet_set_cmd_state (int packet
)
1529 return remote_protocol_packets
[packet
].detect
;
1532 /* Returns whether a given packet or feature is supported. This takes
1533 into account the state of the corresponding "set remote foo-packet"
1534 command, which may be used to bypass auto-detection. */
1536 static enum packet_support
1537 packet_config_support (struct packet_config
*config
)
1539 switch (config
->detect
)
1541 case AUTO_BOOLEAN_TRUE
:
1542 return PACKET_ENABLE
;
1543 case AUTO_BOOLEAN_FALSE
:
1544 return PACKET_DISABLE
;
1545 case AUTO_BOOLEAN_AUTO
:
1546 return config
->support
;
1548 gdb_assert_not_reached (_("bad switch"));
1552 /* Same as packet_config_support, but takes the packet's enum value as
1555 static enum packet_support
1556 packet_support (int packet
)
1558 struct packet_config
*config
= &remote_protocol_packets
[packet
];
1560 return packet_config_support (config
);
1564 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1565 struct cmd_list_element
*c
,
1568 struct packet_config
*packet
;
1570 for (packet
= remote_protocol_packets
;
1571 packet
< &remote_protocol_packets
[PACKET_MAX
];
1574 if (&packet
->detect
== c
->var
)
1576 show_packet_config_cmd (packet
);
1580 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1584 /* Should we try one of the 'Z' requests? */
1588 Z_PACKET_SOFTWARE_BP
,
1589 Z_PACKET_HARDWARE_BP
,
1596 /* For compatibility with older distributions. Provide a ``set remote
1597 Z-packet ...'' command that updates all the Z packet types. */
1599 static enum auto_boolean remote_Z_packet_detect
;
1602 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
1603 struct cmd_list_element
*c
)
1607 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1608 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1612 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1613 struct cmd_list_element
*c
,
1618 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1620 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1624 /* Returns true if the multi-process extensions are in effect. */
1627 remote_multi_process_p (struct remote_state
*rs
)
1629 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
1632 /* Returns true if fork events are supported. */
1635 remote_fork_event_p (struct remote_state
*rs
)
1637 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
1640 /* Returns true if vfork events are supported. */
1643 remote_vfork_event_p (struct remote_state
*rs
)
1645 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
1648 /* Returns true if exec events are supported. */
1651 remote_exec_event_p (struct remote_state
*rs
)
1653 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
1656 /* Insert fork catchpoint target routine. If fork events are enabled
1657 then return success, nothing more to do. */
1660 remote_insert_fork_catchpoint (struct target_ops
*ops
, int pid
)
1662 struct remote_state
*rs
= get_remote_state ();
1664 return !remote_fork_event_p (rs
);
1667 /* Remove fork catchpoint target routine. Nothing to do, just
1671 remote_remove_fork_catchpoint (struct target_ops
*ops
, int pid
)
1676 /* Insert vfork catchpoint target routine. If vfork events are enabled
1677 then return success, nothing more to do. */
1680 remote_insert_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1682 struct remote_state
*rs
= get_remote_state ();
1684 return !remote_vfork_event_p (rs
);
1687 /* Remove vfork catchpoint target routine. Nothing to do, just
1691 remote_remove_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1696 /* Insert exec catchpoint target routine. If exec events are
1697 enabled, just return success. */
1700 remote_insert_exec_catchpoint (struct target_ops
*ops
, int pid
)
1702 struct remote_state
*rs
= get_remote_state ();
1704 return !remote_exec_event_p (rs
);
1707 /* Remove exec catchpoint target routine. Nothing to do, just
1711 remote_remove_exec_catchpoint (struct target_ops
*ops
, int pid
)
1717 /* Asynchronous signal handle registered as event loop source for
1718 when we have pending events ready to be passed to the core. */
1720 static struct async_event_handler
*remote_async_inferior_event_token
;
1724 static ptid_t magic_null_ptid
;
1725 static ptid_t not_sent_ptid
;
1726 static ptid_t any_thread_ptid
;
1728 /* Find out if the stub attached to PID (and hence GDB should offer to
1729 detach instead of killing it when bailing out). */
1732 remote_query_attached (int pid
)
1734 struct remote_state
*rs
= get_remote_state ();
1735 size_t size
= get_remote_packet_size ();
1737 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
1740 if (remote_multi_process_p (rs
))
1741 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
1743 xsnprintf (rs
->buf
, size
, "qAttached");
1746 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1748 switch (packet_ok (rs
->buf
,
1749 &remote_protocol_packets
[PACKET_qAttached
]))
1752 if (strcmp (rs
->buf
, "1") == 0)
1756 warning (_("Remote failure reply: %s"), rs
->buf
);
1758 case PACKET_UNKNOWN
:
1765 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1766 has been invented by GDB, instead of reported by the target. Since
1767 we can be connected to a remote system before before knowing about
1768 any inferior, mark the target with execution when we find the first
1769 inferior. If ATTACHED is 1, then we had just attached to this
1770 inferior. If it is 0, then we just created this inferior. If it
1771 is -1, then try querying the remote stub to find out if it had
1772 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1773 attempt to open this inferior's executable as the main executable
1774 if no main executable is open already. */
1776 static struct inferior
*
1777 remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
1780 struct inferior
*inf
;
1782 /* Check whether this process we're learning about is to be
1783 considered attached, or if is to be considered to have been
1784 spawned by the stub. */
1786 attached
= remote_query_attached (pid
);
1788 if (gdbarch_has_global_solist (target_gdbarch ()))
1790 /* If the target shares code across all inferiors, then every
1791 attach adds a new inferior. */
1792 inf
= add_inferior (pid
);
1794 /* ... and every inferior is bound to the same program space.
1795 However, each inferior may still have its own address
1797 inf
->aspace
= maybe_new_address_space ();
1798 inf
->pspace
= current_program_space
;
1802 /* In the traditional debugging scenario, there's a 1-1 match
1803 between program/address spaces. We simply bind the inferior
1804 to the program space's address space. */
1805 inf
= current_inferior ();
1806 inferior_appeared (inf
, pid
);
1809 inf
->attach_flag
= attached
;
1810 inf
->fake_pid_p
= fake_pid_p
;
1812 /* If no main executable is currently open then attempt to
1813 open the file that was executed to create this inferior. */
1814 if (try_open_exec
&& get_exec_file (0) == NULL
)
1815 exec_file_locate_attach (pid
, 0, 1);
1820 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
1822 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1823 according to RUNNING. */
1826 remote_add_thread (ptid_t ptid
, int running
, int executing
)
1828 struct remote_state
*rs
= get_remote_state ();
1829 struct thread_info
*thread
;
1831 /* GDB historically didn't pull threads in the initial connection
1832 setup. If the remote target doesn't even have a concept of
1833 threads (e.g., a bare-metal target), even if internally we
1834 consider that a single-threaded target, mentioning a new thread
1835 might be confusing to the user. Be silent then, preserving the
1836 age old behavior. */
1837 if (rs
->starting_up
)
1838 thread
= add_thread_silent (ptid
);
1840 thread
= add_thread (ptid
);
1842 get_remote_thread_info (thread
)->vcont_resumed
= executing
;
1843 set_executing (ptid
, executing
);
1844 set_running (ptid
, running
);
1847 /* Come here when we learn about a thread id from the remote target.
1848 It may be the first time we hear about such thread, so take the
1849 opportunity to add it to GDB's thread list. In case this is the
1850 first time we're noticing its corresponding inferior, add it to
1851 GDB's inferior list as well. EXECUTING indicates whether the
1852 thread is (internally) executing or stopped. */
1855 remote_notice_new_inferior (ptid_t currthread
, int executing
)
1857 /* In non-stop mode, we assume new found threads are (externally)
1858 running until proven otherwise with a stop reply. In all-stop,
1859 we can only get here if all threads are stopped. */
1860 int running
= target_is_non_stop_p () ? 1 : 0;
1862 /* If this is a new thread, add it to GDB's thread list.
1863 If we leave it up to WFI to do this, bad things will happen. */
1865 if (in_thread_list (currthread
) && is_exited (currthread
))
1867 /* We're seeing an event on a thread id we knew had exited.
1868 This has to be a new thread reusing the old id. Add it. */
1869 remote_add_thread (currthread
, running
, executing
);
1873 if (!in_thread_list (currthread
))
1875 struct inferior
*inf
= NULL
;
1876 int pid
= ptid_get_pid (currthread
);
1878 if (ptid_is_pid (inferior_ptid
)
1879 && pid
== ptid_get_pid (inferior_ptid
))
1881 /* inferior_ptid has no thread member yet. This can happen
1882 with the vAttach -> remote_wait,"TAAthread:" path if the
1883 stub doesn't support qC. This is the first stop reported
1884 after an attach, so this is the main thread. Update the
1885 ptid in the thread list. */
1886 if (in_thread_list (pid_to_ptid (pid
)))
1887 thread_change_ptid (inferior_ptid
, currthread
);
1890 remote_add_thread (currthread
, running
, executing
);
1891 inferior_ptid
= currthread
;
1896 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1898 /* inferior_ptid is not set yet. This can happen with the
1899 vRun -> remote_wait,"TAAthread:" path if the stub
1900 doesn't support qC. This is the first stop reported
1901 after an attach, so this is the main thread. Update the
1902 ptid in the thread list. */
1903 thread_change_ptid (inferior_ptid
, currthread
);
1907 /* When connecting to a target remote, or to a target
1908 extended-remote which already was debugging an inferior, we
1909 may not know about it yet. Add it before adding its child
1910 thread, so notifications are emitted in a sensible order. */
1911 if (!in_inferior_list (ptid_get_pid (currthread
)))
1913 struct remote_state
*rs
= get_remote_state ();
1914 int fake_pid_p
= !remote_multi_process_p (rs
);
1916 inf
= remote_add_inferior (fake_pid_p
,
1917 ptid_get_pid (currthread
), -1, 1);
1920 /* This is really a new thread. Add it. */
1921 remote_add_thread (currthread
, running
, executing
);
1923 /* If we found a new inferior, let the common code do whatever
1924 it needs to with it (e.g., read shared libraries, insert
1925 breakpoints), unless we're just setting up an all-stop
1929 struct remote_state
*rs
= get_remote_state ();
1931 if (!rs
->starting_up
)
1932 notice_new_inferior (currthread
, executing
, 0);
1937 /* Return THREAD's private thread data, creating it if necessary. */
1939 static remote_thread_info
*
1940 get_remote_thread_info (thread_info
*thread
)
1942 gdb_assert (thread
!= NULL
);
1944 if (thread
->priv
== NULL
)
1945 thread
->priv
.reset (new remote_thread_info
);
1947 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
1950 /* Return PTID's private thread data, creating it if necessary. */
1952 static remote_thread_info
*
1953 get_remote_thread_info (ptid_t ptid
)
1955 struct thread_info
*info
= find_thread_ptid (ptid
);
1957 return get_remote_thread_info (info
);
1960 /* Call this function as a result of
1961 1) A halt indication (T packet) containing a thread id
1962 2) A direct query of currthread
1963 3) Successful execution of set thread */
1966 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
1968 rs
->general_thread
= currthread
;
1971 /* If 'QPassSignals' is supported, tell the remote stub what signals
1972 it can simply pass through to the inferior without reporting. */
1975 remote_pass_signals (struct target_ops
*self
,
1976 int numsigs
, unsigned char *pass_signals
)
1978 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
1980 char *pass_packet
, *p
;
1982 struct remote_state
*rs
= get_remote_state ();
1984 gdb_assert (numsigs
< 256);
1985 for (i
= 0; i
< numsigs
; i
++)
1987 if (pass_signals
[i
])
1990 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1991 strcpy (pass_packet
, "QPassSignals:");
1992 p
= pass_packet
+ strlen (pass_packet
);
1993 for (i
= 0; i
< numsigs
; i
++)
1995 if (pass_signals
[i
])
1998 *p
++ = tohex (i
>> 4);
1999 *p
++ = tohex (i
& 15);
2008 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2010 putpkt (pass_packet
);
2011 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2012 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2013 if (rs
->last_pass_packet
)
2014 xfree (rs
->last_pass_packet
);
2015 rs
->last_pass_packet
= pass_packet
;
2018 xfree (pass_packet
);
2022 /* If 'QCatchSyscalls' is supported, tell the remote stub
2023 to report syscalls to GDB. */
2026 remote_set_syscall_catchpoint (struct target_ops
*self
,
2027 int pid
, bool needed
, int any_count
,
2028 gdb::array_view
<const int> syscall_counts
)
2030 const char *catch_packet
;
2031 enum packet_result result
;
2034 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2036 /* Not supported. */
2040 if (needed
&& any_count
== 0)
2042 /* Count how many syscalls are to be caught. */
2043 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2045 if (syscall_counts
[i
] != 0)
2052 fprintf_unfiltered (gdb_stdlog
,
2053 "remote_set_syscall_catchpoint "
2054 "pid %d needed %d any_count %d n_sysno %d\n",
2055 pid
, needed
, any_count
, n_sysno
);
2058 std::string built_packet
;
2061 /* Prepare a packet with the sysno list, assuming max 8+1
2062 characters for a sysno. If the resulting packet size is too
2063 big, fallback on the non-selective packet. */
2064 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2065 built_packet
.reserve (maxpktsz
);
2066 built_packet
= "QCatchSyscalls:1";
2069 /* Add in each syscall to be caught. */
2070 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2072 if (syscall_counts
[i
] != 0)
2073 string_appendf (built_packet
, ";%zx", i
);
2076 if (built_packet
.size () > get_remote_packet_size ())
2078 /* catch_packet too big. Fallback to less efficient
2079 non selective mode, with GDB doing the filtering. */
2080 catch_packet
= "QCatchSyscalls:1";
2083 catch_packet
= built_packet
.c_str ();
2086 catch_packet
= "QCatchSyscalls:0";
2088 struct remote_state
*rs
= get_remote_state ();
2090 putpkt (catch_packet
);
2091 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2092 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2093 if (result
== PACKET_OK
)
2099 /* If 'QProgramSignals' is supported, tell the remote stub what
2100 signals it should pass through to the inferior when detaching. */
2103 remote_program_signals (struct target_ops
*self
,
2104 int numsigs
, unsigned char *signals
)
2106 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2110 struct remote_state
*rs
= get_remote_state ();
2112 gdb_assert (numsigs
< 256);
2113 for (i
= 0; i
< numsigs
; i
++)
2118 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2119 strcpy (packet
, "QProgramSignals:");
2120 p
= packet
+ strlen (packet
);
2121 for (i
= 0; i
< numsigs
; i
++)
2123 if (signal_pass_state (i
))
2126 *p
++ = tohex (i
>> 4);
2127 *p
++ = tohex (i
& 15);
2136 if (!rs
->last_program_signals_packet
2137 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2140 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2141 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2142 xfree (rs
->last_program_signals_packet
);
2143 rs
->last_program_signals_packet
= packet
;
2150 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2151 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2152 thread. If GEN is set, set the general thread, if not, then set
2153 the step/continue thread. */
2155 set_thread (ptid_t ptid
, int gen
)
2157 struct remote_state
*rs
= get_remote_state ();
2158 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2159 char *buf
= rs
->buf
;
2160 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2162 if (ptid_equal (state
, ptid
))
2166 *buf
++ = gen
? 'g' : 'c';
2167 if (ptid_equal (ptid
, magic_null_ptid
))
2168 xsnprintf (buf
, endbuf
- buf
, "0");
2169 else if (ptid_equal (ptid
, any_thread_ptid
))
2170 xsnprintf (buf
, endbuf
- buf
, "0");
2171 else if (ptid_equal (ptid
, minus_one_ptid
))
2172 xsnprintf (buf
, endbuf
- buf
, "-1");
2174 write_ptid (buf
, endbuf
, ptid
);
2176 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2178 rs
->general_thread
= ptid
;
2180 rs
->continue_thread
= ptid
;
2184 set_general_thread (ptid_t ptid
)
2186 set_thread (ptid
, 1);
2190 set_continue_thread (ptid_t ptid
)
2192 set_thread (ptid
, 0);
2195 /* Change the remote current process. Which thread within the process
2196 ends up selected isn't important, as long as it is the same process
2197 as what INFERIOR_PTID points to.
2199 This comes from that fact that there is no explicit notion of
2200 "selected process" in the protocol. The selected process for
2201 general operations is the process the selected general thread
2205 set_general_process (void)
2207 struct remote_state
*rs
= get_remote_state ();
2209 /* If the remote can't handle multiple processes, don't bother. */
2210 if (!remote_multi_process_p (rs
))
2213 /* We only need to change the remote current thread if it's pointing
2214 at some other process. */
2215 if (ptid_get_pid (rs
->general_thread
) != ptid_get_pid (inferior_ptid
))
2216 set_general_thread (inferior_ptid
);
2220 /* Return nonzero if this is the main thread that we made up ourselves
2221 to model non-threaded targets as single-threaded. */
2224 remote_thread_always_alive (struct target_ops
*ops
, ptid_t ptid
)
2226 if (ptid_equal (ptid
, magic_null_ptid
))
2227 /* The main thread is always alive. */
2230 if (ptid_get_pid (ptid
) != 0 && ptid_get_lwp (ptid
) == 0)
2231 /* The main thread is always alive. This can happen after a
2232 vAttach, if the remote side doesn't support
2239 /* Return nonzero if the thread PTID is still alive on the remote
2243 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2245 struct remote_state
*rs
= get_remote_state ();
2248 /* Check if this is a thread that we made up ourselves to model
2249 non-threaded targets as single-threaded. */
2250 if (remote_thread_always_alive (ops
, ptid
))
2254 endp
= rs
->buf
+ get_remote_packet_size ();
2257 write_ptid (p
, endp
, ptid
);
2260 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2261 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2264 /* Return a pointer to a thread name if we know it and NULL otherwise.
2265 The thread_info object owns the memory for the name. */
2268 remote_thread_name (struct target_ops
*ops
, struct thread_info
*info
)
2270 if (info
->priv
!= NULL
)
2272 const std::string
&name
= get_remote_thread_info (info
)->name
;
2273 return !name
.empty () ? name
.c_str () : NULL
;
2279 /* About these extended threadlist and threadinfo packets. They are
2280 variable length packets but, the fields within them are often fixed
2281 length. They are redundent enough to send over UDP as is the
2282 remote protocol in general. There is a matching unit test module
2285 /* WARNING: This threadref data structure comes from the remote O.S.,
2286 libstub protocol encoding, and remote.c. It is not particularly
2289 /* Right now, the internal structure is int. We want it to be bigger.
2290 Plan to fix this. */
2292 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2294 /* gdb_ext_thread_info is an internal GDB data structure which is
2295 equivalent to the reply of the remote threadinfo packet. */
2297 struct gdb_ext_thread_info
2299 threadref threadid
; /* External form of thread reference. */
2300 int active
; /* Has state interesting to GDB?
2302 char display
[256]; /* Brief state display, name,
2303 blocked/suspended. */
2304 char shortname
[32]; /* To be used to name threads. */
2305 char more_display
[256]; /* Long info, statistics, queue depth,
2309 /* The volume of remote transfers can be limited by submitting
2310 a mask containing bits specifying the desired information.
2311 Use a union of these values as the 'selection' parameter to
2312 get_thread_info. FIXME: Make these TAG names more thread specific. */
2314 #define TAG_THREADID 1
2315 #define TAG_EXISTS 2
2316 #define TAG_DISPLAY 4
2317 #define TAG_THREADNAME 8
2318 #define TAG_MOREDISPLAY 16
2320 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2322 static char *unpack_nibble (char *buf
, int *val
);
2324 static char *unpack_byte (char *buf
, int *value
);
2326 static char *pack_int (char *buf
, int value
);
2328 static char *unpack_int (char *buf
, int *value
);
2330 static char *unpack_string (char *src
, char *dest
, int length
);
2332 static char *pack_threadid (char *pkt
, threadref
*id
);
2334 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2336 void int_to_threadref (threadref
*id
, int value
);
2338 static int threadref_to_int (threadref
*ref
);
2340 static void copy_threadref (threadref
*dest
, threadref
*src
);
2342 static int threadmatch (threadref
*dest
, threadref
*src
);
2344 static char *pack_threadinfo_request (char *pkt
, int mode
,
2347 static int remote_unpack_thread_info_response (char *pkt
,
2348 threadref
*expectedref
,
2349 struct gdb_ext_thread_info
2353 static int remote_get_threadinfo (threadref
*threadid
,
2354 int fieldset
, /*TAG mask */
2355 struct gdb_ext_thread_info
*info
);
2357 static char *pack_threadlist_request (char *pkt
, int startflag
,
2359 threadref
*nextthread
);
2361 static int parse_threadlist_response (char *pkt
,
2363 threadref
*original_echo
,
2364 threadref
*resultlist
,
2367 static int remote_get_threadlist (int startflag
,
2368 threadref
*nextthread
,
2372 threadref
*threadlist
);
2374 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
2376 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
2377 void *context
, int looplimit
);
2379 static int remote_newthread_step (threadref
*ref
, void *context
);
2382 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2383 buffer we're allowed to write to. Returns
2384 BUF+CHARACTERS_WRITTEN. */
2387 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2390 struct remote_state
*rs
= get_remote_state ();
2392 if (remote_multi_process_p (rs
))
2394 pid
= ptid_get_pid (ptid
);
2396 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2398 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2400 tid
= ptid_get_lwp (ptid
);
2402 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2404 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2409 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2410 last parsed char. Returns null_ptid if no thread id is found, and
2411 throws an error if the thread id has an invalid format. */
2414 read_ptid (const char *buf
, const char **obuf
)
2416 const char *p
= buf
;
2418 ULONGEST pid
= 0, tid
= 0;
2422 /* Multi-process ptid. */
2423 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2425 error (_("invalid remote ptid: %s"), p
);
2428 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2431 return ptid_build (pid
, tid
, 0);
2434 /* No multi-process. Just a tid. */
2435 pp
= unpack_varlen_hex (p
, &tid
);
2437 /* Return null_ptid when no thread id is found. */
2445 /* Since the stub is not sending a process id, then default to
2446 what's in inferior_ptid, unless it's null at this point. If so,
2447 then since there's no way to know the pid of the reported
2448 threads, use the magic number. */
2449 if (ptid_equal (inferior_ptid
, null_ptid
))
2450 pid
= ptid_get_pid (magic_null_ptid
);
2452 pid
= ptid_get_pid (inferior_ptid
);
2456 return ptid_build (pid
, tid
, 0);
2462 if (ch
>= 'a' && ch
<= 'f')
2463 return ch
- 'a' + 10;
2464 if (ch
>= '0' && ch
<= '9')
2466 if (ch
>= 'A' && ch
<= 'F')
2467 return ch
- 'A' + 10;
2472 stub_unpack_int (char *buff
, int fieldlength
)
2479 nibble
= stubhex (*buff
++);
2483 retval
= retval
<< 4;
2489 unpack_nibble (char *buf
, int *val
)
2491 *val
= fromhex (*buf
++);
2496 unpack_byte (char *buf
, int *value
)
2498 *value
= stub_unpack_int (buf
, 2);
2503 pack_int (char *buf
, int value
)
2505 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2506 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2507 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2508 buf
= pack_hex_byte (buf
, (value
& 0xff));
2513 unpack_int (char *buf
, int *value
)
2515 *value
= stub_unpack_int (buf
, 8);
2519 #if 0 /* Currently unused, uncomment when needed. */
2520 static char *pack_string (char *pkt
, char *string
);
2523 pack_string (char *pkt
, char *string
)
2528 len
= strlen (string
);
2530 len
= 200; /* Bigger than most GDB packets, junk??? */
2531 pkt
= pack_hex_byte (pkt
, len
);
2535 if ((ch
== '\0') || (ch
== '#'))
2536 ch
= '*'; /* Protect encapsulation. */
2541 #endif /* 0 (unused) */
2544 unpack_string (char *src
, char *dest
, int length
)
2553 pack_threadid (char *pkt
, threadref
*id
)
2556 unsigned char *altid
;
2558 altid
= (unsigned char *) id
;
2559 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2561 pkt
= pack_hex_byte (pkt
, *altid
++);
2567 unpack_threadid (char *inbuf
, threadref
*id
)
2570 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2573 altref
= (char *) id
;
2575 while (inbuf
< limit
)
2577 x
= stubhex (*inbuf
++);
2578 y
= stubhex (*inbuf
++);
2579 *altref
++ = (x
<< 4) | y
;
2584 /* Externally, threadrefs are 64 bits but internally, they are still
2585 ints. This is due to a mismatch of specifications. We would like
2586 to use 64bit thread references internally. This is an adapter
2590 int_to_threadref (threadref
*id
, int value
)
2592 unsigned char *scan
;
2594 scan
= (unsigned char *) id
;
2600 *scan
++ = (value
>> 24) & 0xff;
2601 *scan
++ = (value
>> 16) & 0xff;
2602 *scan
++ = (value
>> 8) & 0xff;
2603 *scan
++ = (value
& 0xff);
2607 threadref_to_int (threadref
*ref
)
2610 unsigned char *scan
;
2616 value
= (value
<< 8) | ((*scan
++) & 0xff);
2621 copy_threadref (threadref
*dest
, threadref
*src
)
2624 unsigned char *csrc
, *cdest
;
2626 csrc
= (unsigned char *) src
;
2627 cdest
= (unsigned char *) dest
;
2634 threadmatch (threadref
*dest
, threadref
*src
)
2636 /* Things are broken right now, so just assume we got a match. */
2638 unsigned char *srcp
, *destp
;
2640 srcp
= (char *) src
;
2641 destp
= (char *) dest
;
2645 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2652 threadid:1, # always request threadid
2659 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2662 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2664 *pkt
++ = 'q'; /* Info Query */
2665 *pkt
++ = 'P'; /* process or thread info */
2666 pkt
= pack_int (pkt
, mode
); /* mode */
2667 pkt
= pack_threadid (pkt
, id
); /* threadid */
2668 *pkt
= '\0'; /* terminate */
2672 /* These values tag the fields in a thread info response packet. */
2673 /* Tagging the fields allows us to request specific fields and to
2674 add more fields as time goes by. */
2676 #define TAG_THREADID 1 /* Echo the thread identifier. */
2677 #define TAG_EXISTS 2 /* Is this process defined enough to
2678 fetch registers and its stack? */
2679 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2680 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2681 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2685 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2686 struct gdb_ext_thread_info
*info
)
2688 struct remote_state
*rs
= get_remote_state ();
2692 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2695 /* info->threadid = 0; FIXME: implement zero_threadref. */
2697 info
->display
[0] = '\0';
2698 info
->shortname
[0] = '\0';
2699 info
->more_display
[0] = '\0';
2701 /* Assume the characters indicating the packet type have been
2703 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2704 pkt
= unpack_threadid (pkt
, &ref
);
2707 warning (_("Incomplete response to threadinfo request."));
2708 if (!threadmatch (&ref
, expectedref
))
2709 { /* This is an answer to a different request. */
2710 warning (_("ERROR RMT Thread info mismatch."));
2713 copy_threadref (&info
->threadid
, &ref
);
2715 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2717 /* Packets are terminated with nulls. */
2718 while ((pkt
< limit
) && mask
&& *pkt
)
2720 pkt
= unpack_int (pkt
, &tag
); /* tag */
2721 pkt
= unpack_byte (pkt
, &length
); /* length */
2722 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2724 warning (_("ERROR RMT: threadinfo tag mismatch."));
2728 if (tag
== TAG_THREADID
)
2732 warning (_("ERROR RMT: length of threadid is not 16."));
2736 pkt
= unpack_threadid (pkt
, &ref
);
2737 mask
= mask
& ~TAG_THREADID
;
2740 if (tag
== TAG_EXISTS
)
2742 info
->active
= stub_unpack_int (pkt
, length
);
2744 mask
= mask
& ~(TAG_EXISTS
);
2747 warning (_("ERROR RMT: 'exists' length too long."));
2753 if (tag
== TAG_THREADNAME
)
2755 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2756 mask
= mask
& ~TAG_THREADNAME
;
2759 if (tag
== TAG_DISPLAY
)
2761 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2762 mask
= mask
& ~TAG_DISPLAY
;
2765 if (tag
== TAG_MOREDISPLAY
)
2767 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2768 mask
= mask
& ~TAG_MOREDISPLAY
;
2771 warning (_("ERROR RMT: unknown thread info tag."));
2772 break; /* Not a tag we know about. */
2778 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2779 struct gdb_ext_thread_info
*info
)
2781 struct remote_state
*rs
= get_remote_state ();
2784 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2786 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2788 if (rs
->buf
[0] == '\0')
2791 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2796 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2799 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2800 threadref
*nextthread
)
2802 *pkt
++ = 'q'; /* info query packet */
2803 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2804 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2805 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2806 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2811 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2814 parse_threadlist_response (char *pkt
, int result_limit
,
2815 threadref
*original_echo
, threadref
*resultlist
,
2818 struct remote_state
*rs
= get_remote_state ();
2820 int count
, resultcount
, done
;
2823 /* Assume the 'q' and 'M chars have been stripped. */
2824 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2825 /* done parse past here */
2826 pkt
= unpack_byte (pkt
, &count
); /* count field */
2827 pkt
= unpack_nibble (pkt
, &done
);
2828 /* The first threadid is the argument threadid. */
2829 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2830 while ((count
-- > 0) && (pkt
< limit
))
2832 pkt
= unpack_threadid (pkt
, resultlist
++);
2833 if (resultcount
++ >= result_limit
)
2841 /* Fetch the next batch of threads from the remote. Returns -1 if the
2842 qL packet is not supported, 0 on error and 1 on success. */
2845 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2846 int *done
, int *result_count
, threadref
*threadlist
)
2848 struct remote_state
*rs
= get_remote_state ();
2851 /* Trancate result limit to be smaller than the packet size. */
2852 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2853 >= get_remote_packet_size ())
2854 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2856 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2858 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2859 if (*rs
->buf
== '\0')
2861 /* Packet not supported. */
2866 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
2867 &rs
->echo_nextthread
, threadlist
, done
);
2869 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
2871 /* FIXME: This is a good reason to drop the packet. */
2872 /* Possably, there is a duplicate response. */
2874 retransmit immediatly - race conditions
2875 retransmit after timeout - yes
2877 wait for packet, then exit
2879 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2880 return 0; /* I choose simply exiting. */
2882 if (*result_count
<= 0)
2886 warning (_("RMT ERROR : failed to get remote thread list."));
2889 return result
; /* break; */
2891 if (*result_count
> result_limit
)
2894 warning (_("RMT ERROR: threadlist response longer than requested."));
2900 /* Fetch the list of remote threads, with the qL packet, and call
2901 STEPFUNCTION for each thread found. Stops iterating and returns 1
2902 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2903 STEPFUNCTION returns false. If the packet is not supported,
2907 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2910 struct remote_state
*rs
= get_remote_state ();
2911 int done
, i
, result_count
;
2919 if (loopcount
++ > looplimit
)
2922 warning (_("Remote fetch threadlist -infinite loop-."));
2925 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
2926 MAXTHREADLISTRESULTS
,
2927 &done
, &result_count
,
2928 rs
->resultthreadlist
);
2931 /* Clear for later iterations. */
2933 /* Setup to resume next batch of thread references, set nextthread. */
2934 if (result_count
>= 1)
2935 copy_threadref (&rs
->nextthread
,
2936 &rs
->resultthreadlist
[result_count
- 1]);
2938 while (result_count
--)
2940 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
2950 /* A thread found on the remote target. */
2954 explicit thread_item (ptid_t ptid_
)
2958 thread_item (thread_item
&&other
) = default;
2959 thread_item
&operator= (thread_item
&&other
) = default;
2961 DISABLE_COPY_AND_ASSIGN (thread_item
);
2963 /* The thread's PTID. */
2966 /* The thread's extra info. */
2969 /* The thread's name. */
2972 /* The core the thread was running on. -1 if not known. */
2975 /* The thread handle associated with the thread. */
2976 gdb::byte_vector thread_handle
;
2979 /* Context passed around to the various methods listing remote
2980 threads. As new threads are found, they're added to the ITEMS
2983 struct threads_listing_context
2985 /* Return true if this object contains an entry for a thread with ptid
2988 bool contains_thread (ptid_t ptid
) const
2990 auto match_ptid
= [&] (const thread_item
&item
)
2992 return item
.ptid
== ptid
;
2995 auto it
= std::find_if (this->items
.begin (),
2999 return it
!= this->items
.end ();
3002 /* Remove the thread with ptid PTID. */
3004 void remove_thread (ptid_t ptid
)
3006 auto match_ptid
= [&] (const thread_item
&item
)
3008 return item
.ptid
== ptid
;
3011 auto it
= std::remove_if (this->items
.begin (),
3015 if (it
!= this->items
.end ())
3016 this->items
.erase (it
);
3019 /* The threads found on the remote target. */
3020 std::vector
<thread_item
> items
;
3024 remote_newthread_step (threadref
*ref
, void *data
)
3026 struct threads_listing_context
*context
3027 = (struct threads_listing_context
*) data
;
3028 int pid
= inferior_ptid
.pid ();
3029 int lwp
= threadref_to_int (ref
);
3030 ptid_t
ptid (pid
, lwp
);
3032 context
->items
.emplace_back (ptid
);
3034 return 1; /* continue iterator */
3037 #define CRAZY_MAX_THREADS 1000
3040 remote_current_thread (ptid_t oldpid
)
3042 struct remote_state
*rs
= get_remote_state ();
3045 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3046 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3051 result
= read_ptid (&rs
->buf
[2], &obuf
);
3052 if (*obuf
!= '\0' && remote_debug
)
3053 fprintf_unfiltered (gdb_stdlog
,
3054 "warning: garbage in qC reply\n");
3062 /* List remote threads using the deprecated qL packet. */
3065 remote_get_threads_with_ql (struct target_ops
*ops
,
3066 struct threads_listing_context
*context
)
3068 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3069 CRAZY_MAX_THREADS
) >= 0)
3075 #if defined(HAVE_LIBEXPAT)
3078 start_thread (struct gdb_xml_parser
*parser
,
3079 const struct gdb_xml_element
*element
,
3081 std::vector
<gdb_xml_value
> &attributes
)
3083 struct threads_listing_context
*data
3084 = (struct threads_listing_context
*) user_data
;
3085 struct gdb_xml_value
*attr
;
3087 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3088 ptid_t ptid
= read_ptid (id
, NULL
);
3090 data
->items
.emplace_back (ptid
);
3091 thread_item
&item
= data
->items
.back ();
3093 attr
= xml_find_attribute (attributes
, "core");
3095 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3097 attr
= xml_find_attribute (attributes
, "name");
3099 item
.name
= (const char *) attr
->value
.get ();
3101 attr
= xml_find_attribute (attributes
, "handle");
3103 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3107 end_thread (struct gdb_xml_parser
*parser
,
3108 const struct gdb_xml_element
*element
,
3109 void *user_data
, const char *body_text
)
3111 struct threads_listing_context
*data
3112 = (struct threads_listing_context
*) user_data
;
3114 if (body_text
!= NULL
&& *body_text
!= '\0')
3115 data
->items
.back ().extra
= body_text
;
3118 const struct gdb_xml_attribute thread_attributes
[] = {
3119 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3120 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3121 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3122 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3123 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3126 const struct gdb_xml_element thread_children
[] = {
3127 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3130 const struct gdb_xml_element threads_children
[] = {
3131 { "thread", thread_attributes
, thread_children
,
3132 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3133 start_thread
, end_thread
},
3134 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3137 const struct gdb_xml_element threads_elements
[] = {
3138 { "threads", NULL
, threads_children
,
3139 GDB_XML_EF_NONE
, NULL
, NULL
},
3140 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3145 /* List remote threads using qXfer:threads:read. */
3148 remote_get_threads_with_qxfer (struct target_ops
*ops
,
3149 struct threads_listing_context
*context
)
3151 #if defined(HAVE_LIBEXPAT)
3152 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3154 gdb::optional
<gdb::char_vector
> xml
3155 = target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3157 if (xml
&& (*xml
)[0] != '\0')
3159 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3160 threads_elements
, xml
->data (), context
);
3170 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3173 remote_get_threads_with_qthreadinfo (struct target_ops
*ops
,
3174 struct threads_listing_context
*context
)
3176 struct remote_state
*rs
= get_remote_state ();
3178 if (rs
->use_threadinfo_query
)
3182 putpkt ("qfThreadInfo");
3183 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3185 if (bufp
[0] != '\0') /* q packet recognized */
3187 while (*bufp
++ == 'm') /* reply contains one or more TID */
3191 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3192 context
->items
.emplace_back (ptid
);
3194 while (*bufp
++ == ','); /* comma-separated list */
3195 putpkt ("qsThreadInfo");
3196 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3203 /* Packet not recognized. */
3204 rs
->use_threadinfo_query
= 0;
3211 /* Implement the to_update_thread_list function for the remote
3215 remote_update_thread_list (struct target_ops
*ops
)
3217 struct threads_listing_context context
;
3220 /* We have a few different mechanisms to fetch the thread list. Try
3221 them all, starting with the most preferred one first, falling
3222 back to older methods. */
3223 if (remote_get_threads_with_qxfer (ops
, &context
)
3224 || remote_get_threads_with_qthreadinfo (ops
, &context
)
3225 || remote_get_threads_with_ql (ops
, &context
))
3227 struct thread_info
*tp
, *tmp
;
3231 if (context
.items
.empty ()
3232 && remote_thread_always_alive (ops
, inferior_ptid
))
3234 /* Some targets don't really support threads, but still
3235 reply an (empty) thread list in response to the thread
3236 listing packets, instead of replying "packet not
3237 supported". Exit early so we don't delete the main
3242 /* CONTEXT now holds the current thread list on the remote
3243 target end. Delete GDB-side threads no longer found on the
3245 ALL_THREADS_SAFE (tp
, tmp
)
3247 if (!context
.contains_thread (tp
->ptid
))
3250 delete_thread (tp
->ptid
);
3254 /* Remove any unreported fork child threads from CONTEXT so
3255 that we don't interfere with follow fork, which is where
3256 creation of such threads is handled. */
3257 remove_new_fork_children (&context
);
3259 /* And now add threads we don't know about yet to our list. */
3260 for (thread_item
&item
: context
.items
)
3262 if (item
.ptid
!= null_ptid
)
3264 /* In non-stop mode, we assume new found threads are
3265 executing until proven otherwise with a stop reply.
3266 In all-stop, we can only get here if all threads are
3268 int executing
= target_is_non_stop_p () ? 1 : 0;
3270 remote_notice_new_inferior (item
.ptid
, executing
);
3272 remote_thread_info
*info
= get_remote_thread_info (item
.ptid
);
3273 info
->core
= item
.core
;
3274 info
->extra
= std::move (item
.extra
);
3275 info
->name
= std::move (item
.name
);
3276 info
->thread_handle
= std::move (item
.thread_handle
);
3283 /* If no thread listing method is supported, then query whether
3284 each known thread is alive, one by one, with the T packet.
3285 If the target doesn't support threads at all, then this is a
3286 no-op. See remote_thread_alive. */
3292 * Collect a descriptive string about the given thread.
3293 * The target may say anything it wants to about the thread
3294 * (typically info about its blocked / runnable state, name, etc.).
3295 * This string will appear in the info threads display.
3297 * Optional: targets are not required to implement this function.
3301 remote_threads_extra_info (struct target_ops
*self
, struct thread_info
*tp
)
3303 struct remote_state
*rs
= get_remote_state ();
3307 struct gdb_ext_thread_info threadinfo
;
3308 static char display_buf
[100]; /* arbitrary... */
3309 int n
= 0; /* position in display_buf */
3311 if (rs
->remote_desc
== 0) /* paranoia */
3312 internal_error (__FILE__
, __LINE__
,
3313 _("remote_threads_extra_info"));
3315 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
3316 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_lwp (tp
->ptid
) == 0))
3317 /* This is the main thread which was added by GDB. The remote
3318 server doesn't know about it. */
3321 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3323 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
3325 if (info
!= NULL
&& info
->priv
!= NULL
)
3327 const std::string
&extra
= get_remote_thread_info (info
)->extra
;
3328 return !extra
.empty () ? extra
.c_str () : NULL
;
3334 if (rs
->use_threadextra_query
)
3337 char *endb
= rs
->buf
+ get_remote_packet_size ();
3339 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3341 write_ptid (b
, endb
, tp
->ptid
);
3344 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3345 if (rs
->buf
[0] != 0)
3347 n
= std::min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3348 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3349 display_buf
[result
] = '\0';
3354 /* If the above query fails, fall back to the old method. */
3355 rs
->use_threadextra_query
= 0;
3356 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3357 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3358 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3359 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3360 if (threadinfo
.active
)
3362 if (*threadinfo
.shortname
)
3363 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3364 " Name: %s,", threadinfo
.shortname
);
3365 if (*threadinfo
.display
)
3366 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3367 " State: %s,", threadinfo
.display
);
3368 if (*threadinfo
.more_display
)
3369 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3370 " Priority: %s", threadinfo
.more_display
);
3374 /* For purely cosmetic reasons, clear up trailing commas. */
3375 if (',' == display_buf
[n
-1])
3376 display_buf
[n
-1] = ' ';
3385 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3386 struct static_tracepoint_marker
*marker
)
3388 struct remote_state
*rs
= get_remote_state ();
3391 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3393 p
+= hexnumstr (p
, addr
);
3395 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3399 error (_("Remote failure reply: %s"), p
);
3403 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3410 static std::vector
<static_tracepoint_marker
>
3411 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3414 struct remote_state
*rs
= get_remote_state ();
3415 std::vector
<static_tracepoint_marker
> markers
;
3417 static_tracepoint_marker marker
;
3419 /* Ask for a first packet of static tracepoint marker
3422 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3425 error (_("Remote failure reply: %s"), p
);
3431 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
3433 if (strid
== NULL
|| marker
.str_id
== strid
)
3434 markers
.push_back (std::move (marker
));
3436 while (*p
++ == ','); /* comma-separated list */
3437 /* Ask for another packet of static tracepoint definition. */
3439 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3447 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3450 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3452 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3456 /* Restart the remote side; this is an extended protocol operation. */
3459 extended_remote_restart (void)
3461 struct remote_state
*rs
= get_remote_state ();
3463 /* Send the restart command; for reasons I don't understand the
3464 remote side really expects a number after the "R". */
3465 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3468 remote_fileio_reset ();
3471 /* Clean up connection to a remote debugger. */
3474 remote_close (struct target_ops
*self
)
3476 struct remote_state
*rs
= get_remote_state ();
3478 if (rs
->remote_desc
== NULL
)
3479 return; /* already closed */
3481 /* Make sure we leave stdin registered in the event loop. */
3482 remote_terminal_ours (self
);
3484 serial_close (rs
->remote_desc
);
3485 rs
->remote_desc
= NULL
;
3487 /* We don't have a connection to the remote stub anymore. Get rid
3488 of all the inferiors and their threads we were controlling.
3489 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3490 will be unable to find the thread corresponding to (pid, 0, 0). */
3491 inferior_ptid
= null_ptid
;
3492 discard_all_inferiors ();
3494 /* We are closing the remote target, so we should discard
3495 everything of this target. */
3496 discard_pending_stop_replies_in_queue (rs
);
3498 if (remote_async_inferior_event_token
)
3499 delete_async_event_handler (&remote_async_inferior_event_token
);
3501 remote_notif_state_xfree (rs
->notif_state
);
3503 trace_reset_local_state ();
3506 /* Query the remote side for the text, data and bss offsets. */
3511 struct remote_state
*rs
= get_remote_state ();
3514 int lose
, num_segments
= 0, do_sections
, do_segments
;
3515 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3516 struct section_offsets
*offs
;
3517 struct symfile_segment_data
*data
;
3519 if (symfile_objfile
== NULL
)
3522 putpkt ("qOffsets");
3523 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3526 if (buf
[0] == '\000')
3527 return; /* Return silently. Stub doesn't support
3531 warning (_("Remote failure reply: %s"), buf
);
3535 /* Pick up each field in turn. This used to be done with scanf, but
3536 scanf will make trouble if CORE_ADDR size doesn't match
3537 conversion directives correctly. The following code will work
3538 with any size of CORE_ADDR. */
3539 text_addr
= data_addr
= bss_addr
= 0;
3543 if (startswith (ptr
, "Text="))
3546 /* Don't use strtol, could lose on big values. */
3547 while (*ptr
&& *ptr
!= ';')
3548 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3550 if (startswith (ptr
, ";Data="))
3553 while (*ptr
&& *ptr
!= ';')
3554 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3559 if (!lose
&& startswith (ptr
, ";Bss="))
3562 while (*ptr
&& *ptr
!= ';')
3563 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3565 if (bss_addr
!= data_addr
)
3566 warning (_("Target reported unsupported offsets: %s"), buf
);
3571 else if (startswith (ptr
, "TextSeg="))
3574 /* Don't use strtol, could lose on big values. */
3575 while (*ptr
&& *ptr
!= ';')
3576 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3579 if (startswith (ptr
, ";DataSeg="))
3582 while (*ptr
&& *ptr
!= ';')
3583 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3591 error (_("Malformed response to offset query, %s"), buf
);
3592 else if (*ptr
!= '\0')
3593 warning (_("Target reported unsupported offsets: %s"), buf
);
3595 offs
= ((struct section_offsets
*)
3596 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3597 memcpy (offs
, symfile_objfile
->section_offsets
,
3598 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3600 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3601 do_segments
= (data
!= NULL
);
3602 do_sections
= num_segments
== 0;
3604 if (num_segments
> 0)
3606 segments
[0] = text_addr
;
3607 segments
[1] = data_addr
;
3609 /* If we have two segments, we can still try to relocate everything
3610 by assuming that the .text and .data offsets apply to the whole
3611 text and data segments. Convert the offsets given in the packet
3612 to base addresses for symfile_map_offsets_to_segments. */
3613 else if (data
&& data
->num_segments
== 2)
3615 segments
[0] = data
->segment_bases
[0] + text_addr
;
3616 segments
[1] = data
->segment_bases
[1] + data_addr
;
3619 /* If the object file has only one segment, assume that it is text
3620 rather than data; main programs with no writable data are rare,
3621 but programs with no code are useless. Of course the code might
3622 have ended up in the data segment... to detect that we would need
3623 the permissions here. */
3624 else if (data
&& data
->num_segments
== 1)
3626 segments
[0] = data
->segment_bases
[0] + text_addr
;
3629 /* There's no way to relocate by segment. */
3635 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3636 offs
, num_segments
, segments
);
3638 if (ret
== 0 && !do_sections
)
3639 error (_("Can not handle qOffsets TextSeg "
3640 "response with this symbol file"));
3647 free_symfile_segment_data (data
);
3651 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3653 /* This is a temporary kludge to force data and bss to use the
3654 same offsets because that's what nlmconv does now. The real
3655 solution requires changes to the stub and remote.c that I
3656 don't have time to do right now. */
3658 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3659 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3662 objfile_relocate (symfile_objfile
, offs
);
3665 /* Send interrupt_sequence to remote target. */
3667 send_interrupt_sequence (void)
3669 struct remote_state
*rs
= get_remote_state ();
3671 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3672 remote_serial_write ("\x03", 1);
3673 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3674 serial_send_break (rs
->remote_desc
);
3675 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3677 serial_send_break (rs
->remote_desc
);
3678 remote_serial_write ("g", 1);
3681 internal_error (__FILE__
, __LINE__
,
3682 _("Invalid value for interrupt_sequence_mode: %s."),
3683 interrupt_sequence_mode
);
3687 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3688 and extract the PTID. Returns NULL_PTID if not found. */
3691 stop_reply_extract_thread (char *stop_reply
)
3693 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3697 /* Txx r:val ; r:val (...) */
3700 /* Look for "register" named "thread". */
3705 p1
= strchr (p
, ':');
3709 if (strncmp (p
, "thread", p1
- p
) == 0)
3710 return read_ptid (++p1
, &p
);
3712 p1
= strchr (p
, ';');
3724 /* Determine the remote side's current thread. If we have a stop
3725 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3726 "thread" register we can extract the current thread from. If not,
3727 ask the remote which is the current thread with qC. The former
3728 method avoids a roundtrip. */
3731 get_current_thread (char *wait_status
)
3733 ptid_t ptid
= null_ptid
;
3735 /* Note we don't use remote_parse_stop_reply as that makes use of
3736 the target architecture, which we haven't yet fully determined at
3738 if (wait_status
!= NULL
)
3739 ptid
= stop_reply_extract_thread (wait_status
);
3740 if (ptid_equal (ptid
, null_ptid
))
3741 ptid
= remote_current_thread (inferior_ptid
);
3746 /* Query the remote target for which is the current thread/process,
3747 add it to our tables, and update INFERIOR_PTID. The caller is
3748 responsible for setting the state such that the remote end is ready
3749 to return the current thread.
3751 This function is called after handling the '?' or 'vRun' packets,
3752 whose response is a stop reply from which we can also try
3753 extracting the thread. If the target doesn't support the explicit
3754 qC query, we infer the current thread from that stop reply, passed
3755 in in WAIT_STATUS, which may be NULL. */
3758 add_current_inferior_and_thread (char *wait_status
)
3760 struct remote_state
*rs
= get_remote_state ();
3763 inferior_ptid
= null_ptid
;
3765 /* Now, if we have thread information, update inferior_ptid. */
3766 ptid_t curr_ptid
= get_current_thread (wait_status
);
3768 if (curr_ptid
!= null_ptid
)
3770 if (!remote_multi_process_p (rs
))
3775 /* Without this, some commands which require an active target
3776 (such as kill) won't work. This variable serves (at least)
3777 double duty as both the pid of the target process (if it has
3778 such), and as a flag indicating that a target is active. */
3779 curr_ptid
= magic_null_ptid
;
3783 remote_add_inferior (fake_pid_p
, ptid_get_pid (curr_ptid
), -1, 1);
3785 /* Add the main thread and switch to it. Don't try reading
3786 registers yet, since we haven't fetched the target description
3788 thread_info
*tp
= add_thread_silent (curr_ptid
);
3789 switch_to_thread_no_regs (tp
);
3792 /* Print info about a thread that was found already stopped on
3796 print_one_stopped_thread (struct thread_info
*thread
)
3798 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3800 switch_to_thread (thread
->ptid
);
3801 stop_pc
= get_frame_pc (get_current_frame ());
3802 set_current_sal_from_frame (get_current_frame ());
3804 thread
->suspend
.waitstatus_pending_p
= 0;
3806 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3808 enum gdb_signal sig
= ws
->value
.sig
;
3810 if (signal_print_state (sig
))
3811 gdb::observers::signal_received
.notify (sig
);
3813 gdb::observers::normal_stop
.notify (NULL
, 1);
3816 /* Process all initial stop replies the remote side sent in response
3817 to the ? packet. These indicate threads that were already stopped
3818 on initial connection. We mark these threads as stopped and print
3819 their current frame before giving the user the prompt. */
3822 process_initial_stop_replies (int from_tty
)
3824 int pending_stop_replies
= stop_reply_queue_length ();
3825 struct inferior
*inf
;
3826 struct thread_info
*thread
;
3827 struct thread_info
*selected
= NULL
;
3828 struct thread_info
*lowest_stopped
= NULL
;
3829 struct thread_info
*first
= NULL
;
3831 /* Consume the initial pending events. */
3832 while (pending_stop_replies
-- > 0)
3834 ptid_t waiton_ptid
= minus_one_ptid
;
3836 struct target_waitstatus ws
;
3837 int ignore_event
= 0;
3838 struct thread_info
*thread
;
3840 memset (&ws
, 0, sizeof (ws
));
3841 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3843 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3847 case TARGET_WAITKIND_IGNORE
:
3848 case TARGET_WAITKIND_NO_RESUMED
:
3849 case TARGET_WAITKIND_SIGNALLED
:
3850 case TARGET_WAITKIND_EXITED
:
3851 /* We shouldn't see these, but if we do, just ignore. */
3853 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3857 case TARGET_WAITKIND_EXECD
:
3858 xfree (ws
.value
.execd_pathname
);
3867 thread
= find_thread_ptid (event_ptid
);
3869 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3871 enum gdb_signal sig
= ws
.value
.sig
;
3873 /* Stubs traditionally report SIGTRAP as initial signal,
3874 instead of signal 0. Suppress it. */
3875 if (sig
== GDB_SIGNAL_TRAP
)
3877 thread
->suspend
.stop_signal
= sig
;
3881 thread
->suspend
.waitstatus
= ws
;
3883 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3884 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3885 thread
->suspend
.waitstatus_pending_p
= 1;
3887 set_executing (event_ptid
, 0);
3888 set_running (event_ptid
, 0);
3889 get_remote_thread_info (thread
)->vcont_resumed
= 0;
3892 /* "Notice" the new inferiors before anything related to
3893 registers/memory. */
3899 inf
->needs_setup
= 1;
3903 thread
= any_live_thread_of_process (inf
->pid
);
3904 notice_new_inferior (thread
->ptid
,
3905 thread
->state
== THREAD_RUNNING
,
3910 /* If all-stop on top of non-stop, pause all threads. Note this
3911 records the threads' stop pc, so must be done after "noticing"
3915 stop_all_threads ();
3917 /* If all threads of an inferior were already stopped, we
3918 haven't setup the inferior yet. */
3924 if (inf
->needs_setup
)
3926 thread
= any_live_thread_of_process (inf
->pid
);
3927 switch_to_thread_no_regs (thread
);
3933 /* Now go over all threads that are stopped, and print their current
3934 frame. If all-stop, then if there's a signalled thread, pick
3936 ALL_NON_EXITED_THREADS (thread
)
3942 set_running (thread
->ptid
, 0);
3943 else if (thread
->state
!= THREAD_STOPPED
)
3946 if (selected
== NULL
3947 && thread
->suspend
.waitstatus_pending_p
)
3950 if (lowest_stopped
== NULL
3951 || thread
->inf
->num
< lowest_stopped
->inf
->num
3952 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
3953 lowest_stopped
= thread
;
3956 print_one_stopped_thread (thread
);
3959 /* In all-stop, we only print the status of one thread, and leave
3960 others with their status pending. */
3965 thread
= lowest_stopped
;
3969 print_one_stopped_thread (thread
);
3972 /* For "info program". */
3973 thread
= inferior_thread ();
3974 if (thread
->state
== THREAD_STOPPED
)
3975 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
3978 /* Start the remote connection and sync state. */
3981 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
3983 struct remote_state
*rs
= get_remote_state ();
3984 struct packet_config
*noack_config
;
3985 char *wait_status
= NULL
;
3987 /* Signal other parts that we're going through the initial setup,
3988 and so things may not be stable yet. E.g., we don't try to
3989 install tracepoints until we've relocated symbols. Also, a
3990 Ctrl-C before we're connected and synced up can't interrupt the
3991 target. Instead, it offers to drop the (potentially wedged)
3993 rs
->starting_up
= 1;
3997 if (interrupt_on_connect
)
3998 send_interrupt_sequence ();
4000 /* Ack any packet which the remote side has already sent. */
4001 remote_serial_write ("+", 1);
4003 /* The first packet we send to the target is the optional "supported
4004 packets" request. If the target can answer this, it will tell us
4005 which later probes to skip. */
4006 remote_query_supported ();
4008 /* If the stub wants to get a QAllow, compose one and send it. */
4009 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4010 remote_set_permissions (target
);
4012 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4013 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4014 as a reply to known packet. For packet "vFile:setfs:" it is an
4015 invalid reply and GDB would return error in
4016 remote_hostio_set_filesystem, making remote files access impossible.
4017 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4018 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4020 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4022 putpkt (v_mustreplyempty
);
4023 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4024 if (strcmp (rs
->buf
, "OK") == 0)
4025 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4026 else if (strcmp (rs
->buf
, "") != 0)
4027 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4031 /* Next, we possibly activate noack mode.
4033 If the QStartNoAckMode packet configuration is set to AUTO,
4034 enable noack mode if the stub reported a wish for it with
4037 If set to TRUE, then enable noack mode even if the stub didn't
4038 report it in qSupported. If the stub doesn't reply OK, the
4039 session ends with an error.
4041 If FALSE, then don't activate noack mode, regardless of what the
4042 stub claimed should be the default with qSupported. */
4044 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4045 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4047 putpkt ("QStartNoAckMode");
4048 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4049 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4055 /* Tell the remote that we are using the extended protocol. */
4057 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4060 /* Let the target know which signals it is allowed to pass down to
4062 update_signals_program_target ();
4064 /* Next, if the target can specify a description, read it. We do
4065 this before anything involving memory or registers. */
4066 target_find_description ();
4068 /* Next, now that we know something about the target, update the
4069 address spaces in the program spaces. */
4070 update_address_spaces ();
4072 /* On OSs where the list of libraries is global to all
4073 processes, we fetch them early. */
4074 if (gdbarch_has_global_solist (target_gdbarch ()))
4075 solib_add (NULL
, from_tty
, auto_solib_add
);
4077 if (target_is_non_stop_p ())
4079 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4080 error (_("Non-stop mode requested, but remote "
4081 "does not support non-stop"));
4083 putpkt ("QNonStop:1");
4084 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4086 if (strcmp (rs
->buf
, "OK") != 0)
4087 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4089 /* Find about threads and processes the stub is already
4090 controlling. We default to adding them in the running state.
4091 The '?' query below will then tell us about which threads are
4093 remote_update_thread_list (target
);
4095 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4097 /* Don't assume that the stub can operate in all-stop mode.
4098 Request it explicitly. */
4099 putpkt ("QNonStop:0");
4100 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4102 if (strcmp (rs
->buf
, "OK") != 0)
4103 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4106 /* Upload TSVs regardless of whether the target is running or not. The
4107 remote stub, such as GDBserver, may have some predefined or builtin
4108 TSVs, even if the target is not running. */
4109 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4111 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4113 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4114 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4117 /* Check whether the target is running now. */
4119 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4121 if (!target_is_non_stop_p ())
4123 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4126 error (_("The target is not running (try extended-remote?)"));
4128 /* We're connected, but not running. Drop out before we
4129 call start_remote. */
4130 rs
->starting_up
= 0;
4135 /* Save the reply for later. */
4136 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4137 strcpy (wait_status
, rs
->buf
);
4140 /* Fetch thread list. */
4141 target_update_thread_list ();
4143 /* Let the stub know that we want it to return the thread. */
4144 set_continue_thread (minus_one_ptid
);
4146 if (thread_count () == 0)
4148 /* Target has no concept of threads at all. GDB treats
4149 non-threaded target as single-threaded; add a main
4151 add_current_inferior_and_thread (wait_status
);
4155 /* We have thread information; select the thread the target
4156 says should be current. If we're reconnecting to a
4157 multi-threaded program, this will ideally be the thread
4158 that last reported an event before GDB disconnected. */
4159 inferior_ptid
= get_current_thread (wait_status
);
4160 if (ptid_equal (inferior_ptid
, null_ptid
))
4162 /* Odd... The target was able to list threads, but not
4163 tell us which thread was current (no "thread"
4164 register in T stop reply?). Just pick the first
4165 thread in the thread list then. */
4168 fprintf_unfiltered (gdb_stdlog
,
4169 "warning: couldn't determine remote "
4170 "current thread; picking first in list.\n");
4172 inferior_ptid
= thread_list
->ptid
;
4176 /* init_wait_for_inferior should be called before get_offsets in order
4177 to manage `inserted' flag in bp loc in a correct state.
4178 breakpoint_init_inferior, called from init_wait_for_inferior, set
4179 `inserted' flag to 0, while before breakpoint_re_set, called from
4180 start_remote, set `inserted' flag to 1. In the initialization of
4181 inferior, breakpoint_init_inferior should be called first, and then
4182 breakpoint_re_set can be called. If this order is broken, state of
4183 `inserted' flag is wrong, and cause some problems on breakpoint
4185 init_wait_for_inferior ();
4187 get_offsets (); /* Get text, data & bss offsets. */
4189 /* If we could not find a description using qXfer, and we know
4190 how to do it some other way, try again. This is not
4191 supported for non-stop; it could be, but it is tricky if
4192 there are no stopped threads when we connect. */
4193 if (remote_read_description_p (target
)
4194 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4196 target_clear_description ();
4197 target_find_description ();
4200 /* Use the previously fetched status. */
4201 gdb_assert (wait_status
!= NULL
);
4202 strcpy (rs
->buf
, wait_status
);
4203 rs
->cached_wait_status
= 1;
4205 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4209 /* Clear WFI global state. Do this before finding about new
4210 threads and inferiors, and setting the current inferior.
4211 Otherwise we would clear the proceed status of the current
4212 inferior when we want its stop_soon state to be preserved
4213 (see notice_new_inferior). */
4214 init_wait_for_inferior ();
4216 /* In non-stop, we will either get an "OK", meaning that there
4217 are no stopped threads at this time; or, a regular stop
4218 reply. In the latter case, there may be more than one thread
4219 stopped --- we pull them all out using the vStopped
4221 if (strcmp (rs
->buf
, "OK") != 0)
4223 struct notif_client
*notif
= ¬if_client_stop
;
4225 /* remote_notif_get_pending_replies acks this one, and gets
4227 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4228 = remote_notif_parse (notif
, rs
->buf
);
4229 remote_notif_get_pending_events (notif
);
4232 if (thread_count () == 0)
4235 error (_("The target is not running (try extended-remote?)"));
4237 /* We're connected, but not running. Drop out before we
4238 call start_remote. */
4239 rs
->starting_up
= 0;
4243 /* In non-stop mode, any cached wait status will be stored in
4244 the stop reply queue. */
4245 gdb_assert (wait_status
== NULL
);
4247 /* Report all signals during attach/startup. */
4248 remote_pass_signals (target
, 0, NULL
);
4250 /* If there are already stopped threads, mark them stopped and
4251 report their stops before giving the prompt to the user. */
4252 process_initial_stop_replies (from_tty
);
4254 if (target_can_async_p ())
4258 /* If we connected to a live target, do some additional setup. */
4259 if (target_has_execution
)
4261 if (symfile_objfile
) /* No use without a symbol-file. */
4262 remote_check_symbols ();
4265 /* Possibly the target has been engaged in a trace run started
4266 previously; find out where things are at. */
4267 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4269 struct uploaded_tp
*uploaded_tps
= NULL
;
4271 if (current_trace_status ()->running
)
4272 printf_filtered (_("Trace is already running on the target.\n"));
4274 remote_upload_tracepoints (target
, &uploaded_tps
);
4276 merge_uploaded_tracepoints (&uploaded_tps
);
4279 /* Possibly the target has been engaged in a btrace record started
4280 previously; find out where things are at. */
4281 remote_btrace_maybe_reopen ();
4283 /* The thread and inferior lists are now synchronized with the
4284 target, our symbols have been relocated, and we're merged the
4285 target's tracepoints with ours. We're done with basic start
4287 rs
->starting_up
= 0;
4289 /* Maybe breakpoints are global and need to be inserted now. */
4290 if (breakpoints_should_be_inserted_now ())
4291 insert_breakpoints ();
4294 /* Open a connection to a remote debugger.
4295 NAME is the filename used for communication. */
4298 remote_open (const char *name
, int from_tty
)
4300 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4303 /* Open a connection to a remote debugger using the extended
4304 remote gdb protocol. NAME is the filename used for communication. */
4307 extended_remote_open (const char *name
, int from_tty
)
4309 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4312 /* Reset all packets back to "unknown support". Called when opening a
4313 new connection to a remote target. */
4316 reset_all_packet_configs_support (void)
4320 for (i
= 0; i
< PACKET_MAX
; i
++)
4321 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4324 /* Initialize all packet configs. */
4327 init_all_packet_configs (void)
4331 for (i
= 0; i
< PACKET_MAX
; i
++)
4333 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4334 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4338 /* Symbol look-up. */
4341 remote_check_symbols (void)
4343 char *msg
, *reply
, *tmp
;
4346 struct cleanup
*old_chain
;
4348 /* The remote side has no concept of inferiors that aren't running
4349 yet, it only knows about running processes. If we're connected
4350 but our current inferior is not running, we should not invite the
4351 remote target to request symbol lookups related to its
4352 (unrelated) current process. */
4353 if (!target_has_execution
)
4356 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4359 /* Make sure the remote is pointing at the right process. Note
4360 there's no way to select "no process". */
4361 set_general_process ();
4363 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4364 because we need both at the same time. */
4365 msg
= (char *) xmalloc (get_remote_packet_size ());
4366 old_chain
= make_cleanup (xfree
, msg
);
4367 reply
= (char *) xmalloc (get_remote_packet_size ());
4368 make_cleanup (free_current_contents
, &reply
);
4369 reply_size
= get_remote_packet_size ();
4371 /* Invite target to request symbol lookups. */
4373 putpkt ("qSymbol::");
4374 getpkt (&reply
, &reply_size
, 0);
4375 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4377 while (startswith (reply
, "qSymbol:"))
4379 struct bound_minimal_symbol sym
;
4382 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4384 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4385 if (sym
.minsym
== NULL
)
4386 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4389 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4390 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4392 /* If this is a function address, return the start of code
4393 instead of any data function descriptor. */
4394 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4398 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4399 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4403 getpkt (&reply
, &reply_size
, 0);
4406 do_cleanups (old_chain
);
4409 static struct serial
*
4410 remote_serial_open (const char *name
)
4412 static int udp_warning
= 0;
4414 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4415 of in ser-tcp.c, because it is the remote protocol assuming that the
4416 serial connection is reliable and not the serial connection promising
4418 if (!udp_warning
&& startswith (name
, "udp:"))
4420 warning (_("The remote protocol may be unreliable over UDP.\n"
4421 "Some events may be lost, rendering further debugging "
4426 return serial_open (name
);
4429 /* Inform the target of our permission settings. The permission flags
4430 work without this, but if the target knows the settings, it can do
4431 a couple things. First, it can add its own check, to catch cases
4432 that somehow manage to get by the permissions checks in target
4433 methods. Second, if the target is wired to disallow particular
4434 settings (for instance, a system in the field that is not set up to
4435 be able to stop at a breakpoint), it can object to any unavailable
4439 remote_set_permissions (struct target_ops
*self
)
4441 struct remote_state
*rs
= get_remote_state ();
4443 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4444 "WriteReg:%x;WriteMem:%x;"
4445 "InsertBreak:%x;InsertTrace:%x;"
4446 "InsertFastTrace:%x;Stop:%x",
4447 may_write_registers
, may_write_memory
,
4448 may_insert_breakpoints
, may_insert_tracepoints
,
4449 may_insert_fast_tracepoints
, may_stop
);
4451 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4453 /* If the target didn't like the packet, warn the user. Do not try
4454 to undo the user's settings, that would just be maddening. */
4455 if (strcmp (rs
->buf
, "OK") != 0)
4456 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4459 /* This type describes each known response to the qSupported
4461 struct protocol_feature
4463 /* The name of this protocol feature. */
4466 /* The default for this protocol feature. */
4467 enum packet_support default_support
;
4469 /* The function to call when this feature is reported, or after
4470 qSupported processing if the feature is not supported.
4471 The first argument points to this structure. The second
4472 argument indicates whether the packet requested support be
4473 enabled, disabled, or probed (or the default, if this function
4474 is being called at the end of processing and this feature was
4475 not reported). The third argument may be NULL; if not NULL, it
4476 is a NUL-terminated string taken from the packet following
4477 this feature's name and an equals sign. */
4478 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4481 /* The corresponding packet for this feature. Only used if
4482 FUNC is remote_supported_packet. */
4487 remote_supported_packet (const struct protocol_feature
*feature
,
4488 enum packet_support support
,
4489 const char *argument
)
4493 warning (_("Remote qSupported response supplied an unexpected value for"
4494 " \"%s\"."), feature
->name
);
4498 remote_protocol_packets
[feature
->packet
].support
= support
;
4502 remote_packet_size (const struct protocol_feature
*feature
,
4503 enum packet_support support
, const char *value
)
4505 struct remote_state
*rs
= get_remote_state ();
4510 if (support
!= PACKET_ENABLE
)
4513 if (value
== NULL
|| *value
== '\0')
4515 warning (_("Remote target reported \"%s\" without a size."),
4521 packet_size
= strtol (value
, &value_end
, 16);
4522 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4524 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4525 feature
->name
, value
);
4529 /* Record the new maximum packet size. */
4530 rs
->explicit_packet_size
= packet_size
;
4533 static const struct protocol_feature remote_protocol_features
[] = {
4534 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4535 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4536 PACKET_qXfer_auxv
},
4537 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4538 PACKET_qXfer_exec_file
},
4539 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4540 PACKET_qXfer_features
},
4541 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4542 PACKET_qXfer_libraries
},
4543 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4544 PACKET_qXfer_libraries_svr4
},
4545 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4546 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4547 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4548 PACKET_qXfer_memory_map
},
4549 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4550 PACKET_qXfer_spu_read
},
4551 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4552 PACKET_qXfer_spu_write
},
4553 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4554 PACKET_qXfer_osdata
},
4555 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4556 PACKET_qXfer_threads
},
4557 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4558 PACKET_qXfer_traceframe_info
},
4559 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4560 PACKET_QPassSignals
},
4561 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4562 PACKET_QCatchSyscalls
},
4563 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4564 PACKET_QProgramSignals
},
4565 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
4566 PACKET_QSetWorkingDir
},
4567 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
4568 PACKET_QStartupWithShell
},
4569 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
4570 PACKET_QEnvironmentHexEncoded
},
4571 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
4572 PACKET_QEnvironmentReset
},
4573 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
4574 PACKET_QEnvironmentUnset
},
4575 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4576 PACKET_QStartNoAckMode
},
4577 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4578 PACKET_multiprocess_feature
},
4579 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4580 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4581 PACKET_qXfer_siginfo_read
},
4582 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4583 PACKET_qXfer_siginfo_write
},
4584 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4585 PACKET_ConditionalTracepoints
},
4586 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4587 PACKET_ConditionalBreakpoints
},
4588 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4589 PACKET_BreakpointCommands
},
4590 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4591 PACKET_FastTracepoints
},
4592 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4593 PACKET_StaticTracepoints
},
4594 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4595 PACKET_InstallInTrace
},
4596 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4597 PACKET_DisconnectedTracing_feature
},
4598 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4600 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4602 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4603 PACKET_TracepointSource
},
4604 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4606 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4607 PACKET_EnableDisableTracepoints_feature
},
4608 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4609 PACKET_qXfer_fdpic
},
4610 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4612 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4613 PACKET_QDisableRandomization
},
4614 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4615 { "QTBuffer:size", PACKET_DISABLE
,
4616 remote_supported_packet
, PACKET_QTBuffer_size
},
4617 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4618 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4619 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4620 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4621 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4622 PACKET_qXfer_btrace
},
4623 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4624 PACKET_qXfer_btrace_conf
},
4625 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4626 PACKET_Qbtrace_conf_bts_size
},
4627 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4628 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4629 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4630 PACKET_fork_event_feature
},
4631 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4632 PACKET_vfork_event_feature
},
4633 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4634 PACKET_exec_event_feature
},
4635 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4636 PACKET_Qbtrace_conf_pt_size
},
4637 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4638 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4639 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4642 static char *remote_support_xml
;
4644 /* Register string appended to "xmlRegisters=" in qSupported query. */
4647 register_remote_support_xml (const char *xml
)
4649 #if defined(HAVE_LIBEXPAT)
4650 if (remote_support_xml
== NULL
)
4651 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4654 char *copy
= xstrdup (remote_support_xml
+ 13);
4655 char *p
= strtok (copy
, ",");
4659 if (strcmp (p
, xml
) == 0)
4666 while ((p
= strtok (NULL
, ",")) != NULL
);
4669 remote_support_xml
= reconcat (remote_support_xml
,
4670 remote_support_xml
, ",", xml
,
4677 remote_query_supported_append (char *msg
, const char *append
)
4680 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4682 return xstrdup (append
);
4686 remote_query_supported (void)
4688 struct remote_state
*rs
= get_remote_state ();
4691 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4693 /* The packet support flags are handled differently for this packet
4694 than for most others. We treat an error, a disabled packet, and
4695 an empty response identically: any features which must be reported
4696 to be used will be automatically disabled. An empty buffer
4697 accomplishes this, since that is also the representation for a list
4698 containing no features. */
4701 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4704 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4706 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4707 q
= remote_query_supported_append (q
, "multiprocess+");
4709 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4710 q
= remote_query_supported_append (q
, "swbreak+");
4711 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4712 q
= remote_query_supported_append (q
, "hwbreak+");
4714 q
= remote_query_supported_append (q
, "qRelocInsn+");
4716 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4717 != AUTO_BOOLEAN_FALSE
)
4718 q
= remote_query_supported_append (q
, "fork-events+");
4719 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4720 != AUTO_BOOLEAN_FALSE
)
4721 q
= remote_query_supported_append (q
, "vfork-events+");
4722 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4723 != AUTO_BOOLEAN_FALSE
)
4724 q
= remote_query_supported_append (q
, "exec-events+");
4726 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4727 q
= remote_query_supported_append (q
, "vContSupported+");
4729 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4730 q
= remote_query_supported_append (q
, "QThreadEvents+");
4732 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4733 q
= remote_query_supported_append (q
, "no-resumed+");
4735 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4736 the qSupported:xmlRegisters=i386 handling. */
4737 if (remote_support_xml
!= NULL
4738 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
4739 q
= remote_query_supported_append (q
, remote_support_xml
);
4741 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4744 do_cleanups (old_chain
);
4746 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4748 /* If an error occured, warn, but do not return - just reset the
4749 buffer to empty and go on to disable features. */
4750 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4753 warning (_("Remote failure reply: %s"), rs
->buf
);
4758 memset (seen
, 0, sizeof (seen
));
4763 enum packet_support is_supported
;
4764 char *p
, *end
, *name_end
, *value
;
4766 /* First separate out this item from the rest of the packet. If
4767 there's another item after this, we overwrite the separator
4768 (terminated strings are much easier to work with). */
4770 end
= strchr (p
, ';');
4773 end
= p
+ strlen (p
);
4783 warning (_("empty item in \"qSupported\" response"));
4788 name_end
= strchr (p
, '=');
4791 /* This is a name=value entry. */
4792 is_supported
= PACKET_ENABLE
;
4793 value
= name_end
+ 1;
4802 is_supported
= PACKET_ENABLE
;
4806 is_supported
= PACKET_DISABLE
;
4810 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4814 warning (_("unrecognized item \"%s\" "
4815 "in \"qSupported\" response"), p
);
4821 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4822 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4824 const struct protocol_feature
*feature
;
4827 feature
= &remote_protocol_features
[i
];
4828 feature
->func (feature
, is_supported
, value
);
4833 /* If we increased the packet size, make sure to increase the global
4834 buffer size also. We delay this until after parsing the entire
4835 qSupported packet, because this is the same buffer we were
4837 if (rs
->buf_size
< rs
->explicit_packet_size
)
4839 rs
->buf_size
= rs
->explicit_packet_size
;
4840 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4843 /* Handle the defaults for unmentioned features. */
4844 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4847 const struct protocol_feature
*feature
;
4849 feature
= &remote_protocol_features
[i
];
4850 feature
->func (feature
, feature
->default_support
, NULL
);
4854 /* Serial QUIT handler for the remote serial descriptor.
4856 Defers handling a Ctrl-C until we're done with the current
4857 command/response packet sequence, unless:
4859 - We're setting up the connection. Don't send a remote interrupt
4860 request, as we're not fully synced yet. Quit immediately
4863 - The target has been resumed in the foreground
4864 (target_terminal::is_ours is false) with a synchronous resume
4865 packet, and we're blocked waiting for the stop reply, thus a
4866 Ctrl-C should be immediately sent to the target.
4868 - We get a second Ctrl-C while still within the same serial read or
4869 write. In that case the serial is seemingly wedged --- offer to
4872 - We see a second Ctrl-C without target response, after having
4873 previously interrupted the target. In that case the target/stub
4874 is probably wedged --- offer to quit/disconnect.
4878 remote_serial_quit_handler (void)
4880 struct remote_state
*rs
= get_remote_state ();
4882 if (check_quit_flag ())
4884 /* If we're starting up, we're not fully synced yet. Quit
4886 if (rs
->starting_up
)
4888 else if (rs
->got_ctrlc_during_io
)
4890 if (query (_("The target is not responding to GDB commands.\n"
4891 "Stop debugging it? ")))
4892 remote_unpush_and_throw ();
4894 /* If ^C has already been sent once, offer to disconnect. */
4895 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
4897 /* All-stop protocol, and blocked waiting for stop reply. Send
4898 an interrupt request. */
4899 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
4900 target_interrupt ();
4902 rs
->got_ctrlc_during_io
= 1;
4906 /* Remove any of the remote.c targets from target stack. Upper targets depend
4907 on it so remove them first. */
4910 remote_unpush_target (void)
4912 pop_all_targets_at_and_above (process_stratum
);
4916 remote_unpush_and_throw (void)
4918 remote_unpush_target ();
4919 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
4923 remote_open_1 (const char *name
, int from_tty
,
4924 struct target_ops
*target
, int extended_p
)
4926 struct remote_state
*rs
= get_remote_state ();
4929 error (_("To open a remote debug connection, you need to specify what\n"
4930 "serial device is attached to the remote system\n"
4931 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4933 /* See FIXME above. */
4934 if (!target_async_permitted
)
4935 wait_forever_enabled_p
= 1;
4937 /* If we're connected to a running target, target_preopen will kill it.
4938 Ask this question first, before target_preopen has a chance to kill
4940 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
4943 && !query (_("Already connected to a remote target. Disconnect? ")))
4944 error (_("Still connected."));
4947 /* Here the possibly existing remote target gets unpushed. */
4948 target_preopen (from_tty
);
4950 /* Make sure we send the passed signals list the next time we resume. */
4951 xfree (rs
->last_pass_packet
);
4952 rs
->last_pass_packet
= NULL
;
4954 /* Make sure we send the program signals list the next time we
4956 xfree (rs
->last_program_signals_packet
);
4957 rs
->last_program_signals_packet
= NULL
;
4959 remote_fileio_reset ();
4960 reopen_exec_file ();
4963 rs
->remote_desc
= remote_serial_open (name
);
4964 if (!rs
->remote_desc
)
4965 perror_with_name (name
);
4967 if (baud_rate
!= -1)
4969 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
4971 /* The requested speed could not be set. Error out to
4972 top level after closing remote_desc. Take care to
4973 set remote_desc to NULL to avoid closing remote_desc
4975 serial_close (rs
->remote_desc
);
4976 rs
->remote_desc
= NULL
;
4977 perror_with_name (name
);
4981 serial_setparity (rs
->remote_desc
, serial_parity
);
4982 serial_raw (rs
->remote_desc
);
4984 /* If there is something sitting in the buffer we might take it as a
4985 response to a command, which would be bad. */
4986 serial_flush_input (rs
->remote_desc
);
4990 puts_filtered ("Remote debugging using ");
4991 puts_filtered (name
);
4992 puts_filtered ("\n");
4994 push_target (target
); /* Switch to using remote target now. */
4996 /* Register extra event sources in the event loop. */
4997 remote_async_inferior_event_token
4998 = create_async_event_handler (remote_async_inferior_event_handler
,
5000 rs
->notif_state
= remote_notif_state_allocate ();
5002 /* Reset the target state; these things will be queried either by
5003 remote_query_supported or as they are needed. */
5004 reset_all_packet_configs_support ();
5005 rs
->cached_wait_status
= 0;
5006 rs
->explicit_packet_size
= 0;
5008 rs
->extended
= extended_p
;
5009 rs
->waiting_for_stop_reply
= 0;
5010 rs
->ctrlc_pending_p
= 0;
5011 rs
->got_ctrlc_during_io
= 0;
5013 rs
->general_thread
= not_sent_ptid
;
5014 rs
->continue_thread
= not_sent_ptid
;
5015 rs
->remote_traceframe_number
= -1;
5017 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5019 /* Probe for ability to use "ThreadInfo" query, as required. */
5020 rs
->use_threadinfo_query
= 1;
5021 rs
->use_threadextra_query
= 1;
5023 readahead_cache_invalidate ();
5025 if (target_async_permitted
)
5027 /* FIXME: cagney/1999-09-23: During the initial connection it is
5028 assumed that the target is already ready and able to respond to
5029 requests. Unfortunately remote_start_remote() eventually calls
5030 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5031 around this. Eventually a mechanism that allows
5032 wait_for_inferior() to expect/get timeouts will be
5034 wait_forever_enabled_p
= 0;
5037 /* First delete any symbols previously loaded from shared libraries. */
5038 no_shared_libraries (NULL
, 0);
5041 init_thread_list ();
5043 /* Start the remote connection. If error() or QUIT, discard this
5044 target (we'd otherwise be in an inconsistent state) and then
5045 propogate the error on up the exception chain. This ensures that
5046 the caller doesn't stumble along blindly assuming that the
5047 function succeeded. The CLI doesn't have this problem but other
5048 UI's, such as MI do.
5050 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5051 this function should return an error indication letting the
5052 caller restore the previous state. Unfortunately the command
5053 ``target remote'' is directly wired to this function making that
5054 impossible. On a positive note, the CLI side of this problem has
5055 been fixed - the function set_cmd_context() makes it possible for
5056 all the ``target ....'' commands to share a common callback
5057 function. See cli-dump.c. */
5062 remote_start_remote (from_tty
, target
, extended_p
);
5064 CATCH (ex
, RETURN_MASK_ALL
)
5066 /* Pop the partially set up target - unless something else did
5067 already before throwing the exception. */
5068 if (rs
->remote_desc
!= NULL
)
5069 remote_unpush_target ();
5070 if (target_async_permitted
)
5071 wait_forever_enabled_p
= 1;
5072 throw_exception (ex
);
5077 remote_btrace_reset ();
5079 if (target_async_permitted
)
5080 wait_forever_enabled_p
= 1;
5083 /* Detach the specified process. */
5086 remote_detach_pid (int pid
)
5088 struct remote_state
*rs
= get_remote_state ();
5090 if (remote_multi_process_p (rs
))
5091 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5093 strcpy (rs
->buf
, "D");
5096 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5098 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5100 else if (rs
->buf
[0] == '\0')
5101 error (_("Remote doesn't know how to detach"));
5103 error (_("Can't detach process."));
5106 /* This detaches a program to which we previously attached, using
5107 inferior_ptid to identify the process. After this is done, GDB
5108 can be used to debug some other program. We better not have left
5109 any breakpoints in the target program or it'll die when it hits
5113 remote_detach_1 (int from_tty
, inferior
*inf
)
5115 int pid
= ptid_get_pid (inferior_ptid
);
5116 struct remote_state
*rs
= get_remote_state ();
5117 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5120 if (!target_has_execution
)
5121 error (_("No process to detach from."));
5123 target_announce_detach (from_tty
);
5125 /* Tell the remote target to detach. */
5126 remote_detach_pid (pid
);
5128 /* Exit only if this is the only active inferior. */
5129 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5130 puts_filtered (_("Ending remote debugging.\n"));
5132 /* Check to see if we are detaching a fork parent. Note that if we
5133 are detaching a fork child, tp == NULL. */
5134 is_fork_parent
= (tp
!= NULL
5135 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5137 /* If doing detach-on-fork, we don't mourn, because that will delete
5138 breakpoints that should be available for the followed inferior. */
5139 if (!is_fork_parent
)
5141 /* Save the pid as a string before mourning, since that will
5142 unpush the remote target, and we need the string after. */
5143 std::string infpid
= target_pid_to_str (pid_to_ptid (pid
));
5145 target_mourn_inferior (inferior_ptid
);
5146 if (print_inferior_events
)
5147 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5148 inf
->num
, infpid
.c_str ());
5152 inferior_ptid
= null_ptid
;
5153 detach_inferior (pid
);
5158 remote_detach (struct target_ops
*ops
, inferior
*inf
, int from_tty
)
5160 remote_detach_1 (from_tty
, inf
);
5164 extended_remote_detach (struct target_ops
*ops
, inferior
*inf
, int from_tty
)
5166 remote_detach_1 (from_tty
, inf
);
5169 /* Target follow-fork function for remote targets. On entry, and
5170 at return, the current inferior is the fork parent.
5172 Note that although this is currently only used for extended-remote,
5173 it is named remote_follow_fork in anticipation of using it for the
5174 remote target as well. */
5177 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5180 struct remote_state
*rs
= get_remote_state ();
5181 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5183 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5184 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5186 /* When following the parent and detaching the child, we detach
5187 the child here. For the case of following the child and
5188 detaching the parent, the detach is done in the target-
5189 independent follow fork code in infrun.c. We can't use
5190 target_detach when detaching an unfollowed child because
5191 the client side doesn't know anything about the child. */
5192 if (detach_fork
&& !follow_child
)
5194 /* Detach the fork child. */
5198 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5199 child_pid
= ptid_get_pid (child_ptid
);
5201 remote_detach_pid (child_pid
);
5207 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5208 in the program space of the new inferior. On entry and at return the
5209 current inferior is the exec'ing inferior. INF is the new exec'd
5210 inferior, which may be the same as the exec'ing inferior unless
5211 follow-exec-mode is "new". */
5214 remote_follow_exec (struct target_ops
*ops
,
5215 struct inferior
*inf
, char *execd_pathname
)
5217 /* We know that this is a target file name, so if it has the "target:"
5218 prefix we strip it off before saving it in the program space. */
5219 if (is_target_filename (execd_pathname
))
5220 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5222 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5225 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5228 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5231 error (_("Argument given to \"disconnect\" when remotely debugging."));
5233 /* Make sure we unpush even the extended remote targets. Calling
5234 target_mourn_inferior won't unpush, and remote_mourn won't
5235 unpush if there is more than one inferior left. */
5236 unpush_target (target
);
5237 generic_mourn_inferior ();
5240 puts_filtered ("Ending remote debugging.\n");
5243 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5244 be chatty about it. */
5247 extended_remote_attach (struct target_ops
*target
, const char *args
,
5250 struct remote_state
*rs
= get_remote_state ();
5252 char *wait_status
= NULL
;
5254 pid
= parse_pid_to_attach (args
);
5256 /* Remote PID can be freely equal to getpid, do not check it here the same
5257 way as in other targets. */
5259 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5260 error (_("This target does not support attaching to a process"));
5264 char *exec_file
= get_exec_file (0);
5267 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5268 target_pid_to_str (pid_to_ptid (pid
)));
5270 printf_unfiltered (_("Attaching to %s\n"),
5271 target_pid_to_str (pid_to_ptid (pid
)));
5273 gdb_flush (gdb_stdout
);
5276 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5278 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5280 switch (packet_ok (rs
->buf
,
5281 &remote_protocol_packets
[PACKET_vAttach
]))
5284 if (!target_is_non_stop_p ())
5286 /* Save the reply for later. */
5287 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5288 strcpy (wait_status
, rs
->buf
);
5290 else if (strcmp (rs
->buf
, "OK") != 0)
5291 error (_("Attaching to %s failed with: %s"),
5292 target_pid_to_str (pid_to_ptid (pid
)),
5295 case PACKET_UNKNOWN
:
5296 error (_("This target does not support attaching to a process"));
5298 error (_("Attaching to %s failed"),
5299 target_pid_to_str (pid_to_ptid (pid
)));
5302 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5304 inferior_ptid
= pid_to_ptid (pid
);
5306 if (target_is_non_stop_p ())
5308 struct thread_info
*thread
;
5310 /* Get list of threads. */
5311 remote_update_thread_list (target
);
5313 thread
= first_thread_of_process (pid
);
5315 inferior_ptid
= thread
->ptid
;
5317 inferior_ptid
= pid_to_ptid (pid
);
5319 /* Invalidate our notion of the remote current thread. */
5320 record_currthread (rs
, minus_one_ptid
);
5324 /* Now, if we have thread information, update inferior_ptid. */
5325 inferior_ptid
= remote_current_thread (inferior_ptid
);
5327 /* Add the main thread to the thread list. */
5328 thread_info
*thr
= add_thread_silent (inferior_ptid
);
5329 /* Don't consider the thread stopped until we've processed the
5330 saved stop reply. */
5331 set_executing (thr
->ptid
, true);
5334 /* Next, if the target can specify a description, read it. We do
5335 this before anything involving memory or registers. */
5336 target_find_description ();
5338 if (!target_is_non_stop_p ())
5340 /* Use the previously fetched status. */
5341 gdb_assert (wait_status
!= NULL
);
5343 if (target_can_async_p ())
5345 struct notif_event
*reply
5346 = remote_notif_parse (¬if_client_stop
, wait_status
);
5348 push_stop_reply ((struct stop_reply
*) reply
);
5354 gdb_assert (wait_status
!= NULL
);
5355 strcpy (rs
->buf
, wait_status
);
5356 rs
->cached_wait_status
= 1;
5360 gdb_assert (wait_status
== NULL
);
5363 /* Implementation of the to_post_attach method. */
5366 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5368 /* Get text, data & bss offsets. */
5371 /* In certain cases GDB might not have had the chance to start
5372 symbol lookup up until now. This could happen if the debugged
5373 binary is not using shared libraries, the vsyscall page is not
5374 present (on Linux) and the binary itself hadn't changed since the
5375 debugging process was started. */
5376 if (symfile_objfile
!= NULL
)
5377 remote_check_symbols();
5381 /* Check for the availability of vCont. This function should also check
5385 remote_vcont_probe (struct remote_state
*rs
)
5389 strcpy (rs
->buf
, "vCont?");
5391 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5394 /* Make sure that the features we assume are supported. */
5395 if (startswith (buf
, "vCont"))
5398 int support_c
, support_C
;
5400 rs
->supports_vCont
.s
= 0;
5401 rs
->supports_vCont
.S
= 0;
5404 rs
->supports_vCont
.t
= 0;
5405 rs
->supports_vCont
.r
= 0;
5406 while (p
&& *p
== ';')
5409 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5410 rs
->supports_vCont
.s
= 1;
5411 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5412 rs
->supports_vCont
.S
= 1;
5413 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5415 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5417 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5418 rs
->supports_vCont
.t
= 1;
5419 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5420 rs
->supports_vCont
.r
= 1;
5422 p
= strchr (p
, ';');
5425 /* If c, and C are not all supported, we can't use vCont. Clearing
5426 BUF will make packet_ok disable the packet. */
5427 if (!support_c
|| !support_C
)
5431 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5434 /* Helper function for building "vCont" resumptions. Write a
5435 resumption to P. ENDP points to one-passed-the-end of the buffer
5436 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5437 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5438 resumed thread should be single-stepped and/or signalled. If PTID
5439 equals minus_one_ptid, then all threads are resumed; if PTID
5440 represents a process, then all threads of the process are resumed;
5441 the thread to be stepped and/or signalled is given in the global
5445 append_resumption (char *p
, char *endp
,
5446 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5448 struct remote_state
*rs
= get_remote_state ();
5450 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5451 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5453 /* GDB is willing to range step. */
5454 && use_range_stepping
5455 /* Target supports range stepping. */
5456 && rs
->supports_vCont
.r
5457 /* We don't currently support range stepping multiple
5458 threads with a wildcard (though the protocol allows it,
5459 so stubs shouldn't make an active effort to forbid
5461 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5463 struct thread_info
*tp
;
5465 if (ptid_equal (ptid
, minus_one_ptid
))
5467 /* If we don't know about the target thread's tid, then
5468 we're resuming magic_null_ptid (see caller). */
5469 tp
= find_thread_ptid (magic_null_ptid
);
5472 tp
= find_thread_ptid (ptid
);
5473 gdb_assert (tp
!= NULL
);
5475 if (tp
->control
.may_range_step
)
5477 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5479 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5480 phex_nz (tp
->control
.step_range_start
,
5482 phex_nz (tp
->control
.step_range_end
,
5486 p
+= xsnprintf (p
, endp
- p
, ";s");
5489 p
+= xsnprintf (p
, endp
- p
, ";s");
5490 else if (siggnal
!= GDB_SIGNAL_0
)
5491 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5493 p
+= xsnprintf (p
, endp
- p
, ";c");
5495 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5499 /* All (-1) threads of process. */
5500 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5502 p
+= xsnprintf (p
, endp
- p
, ":");
5503 p
= write_ptid (p
, endp
, nptid
);
5505 else if (!ptid_equal (ptid
, minus_one_ptid
))
5507 p
+= xsnprintf (p
, endp
- p
, ":");
5508 p
= write_ptid (p
, endp
, ptid
);
5514 /* Clear the thread's private info on resume. */
5517 resume_clear_thread_private_info (struct thread_info
*thread
)
5519 if (thread
->priv
!= NULL
)
5521 remote_thread_info
*priv
= get_remote_thread_info (thread
);
5523 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5524 priv
->watch_data_address
= 0;
5528 /* Append a vCont continue-with-signal action for threads that have a
5529 non-zero stop signal. */
5532 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5534 struct thread_info
*thread
;
5536 ALL_NON_EXITED_THREADS (thread
)
5537 if (ptid_match (thread
->ptid
, ptid
)
5538 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5539 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5541 p
= append_resumption (p
, endp
, thread
->ptid
,
5542 0, thread
->suspend
.stop_signal
);
5543 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5544 resume_clear_thread_private_info (thread
);
5550 /* Set the target running, using the packets that use Hc
5554 remote_resume_with_hc (struct target_ops
*ops
,
5555 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5557 struct remote_state
*rs
= get_remote_state ();
5558 struct thread_info
*thread
;
5561 rs
->last_sent_signal
= siggnal
;
5562 rs
->last_sent_step
= step
;
5564 /* The c/s/C/S resume packets use Hc, so set the continue
5566 if (ptid_equal (ptid
, minus_one_ptid
))
5567 set_continue_thread (any_thread_ptid
);
5569 set_continue_thread (ptid
);
5571 ALL_NON_EXITED_THREADS (thread
)
5572 resume_clear_thread_private_info (thread
);
5575 if (execution_direction
== EXEC_REVERSE
)
5577 /* We don't pass signals to the target in reverse exec mode. */
5578 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5579 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5582 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5583 error (_("Remote reverse-step not supported."));
5584 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5585 error (_("Remote reverse-continue not supported."));
5587 strcpy (buf
, step
? "bs" : "bc");
5589 else if (siggnal
!= GDB_SIGNAL_0
)
5591 buf
[0] = step
? 'S' : 'C';
5592 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5593 buf
[2] = tohex (((int) siggnal
) & 0xf);
5597 strcpy (buf
, step
? "s" : "c");
5602 /* Resume the remote inferior by using a "vCont" packet. The thread
5603 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5604 resumed thread should be single-stepped and/or signalled. If PTID
5605 equals minus_one_ptid, then all threads are resumed; the thread to
5606 be stepped and/or signalled is given in the global INFERIOR_PTID.
5607 This function returns non-zero iff it resumes the inferior.
5609 This function issues a strict subset of all possible vCont commands
5613 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5615 struct remote_state
*rs
= get_remote_state ();
5619 /* No reverse execution actions defined for vCont. */
5620 if (execution_direction
== EXEC_REVERSE
)
5623 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5624 remote_vcont_probe (rs
);
5626 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5630 endp
= rs
->buf
+ get_remote_packet_size ();
5632 /* If we could generate a wider range of packets, we'd have to worry
5633 about overflowing BUF. Should there be a generic
5634 "multi-part-packet" packet? */
5636 p
+= xsnprintf (p
, endp
- p
, "vCont");
5638 if (ptid_equal (ptid
, magic_null_ptid
))
5640 /* MAGIC_NULL_PTID means that we don't have any active threads,
5641 so we don't have any TID numbers the inferior will
5642 understand. Make sure to only send forms that do not specify
5644 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5646 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5648 /* Resume all threads (of all processes, or of a single
5649 process), with preference for INFERIOR_PTID. This assumes
5650 inferior_ptid belongs to the set of all threads we are about
5652 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5654 /* Step inferior_ptid, with or without signal. */
5655 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5658 /* Also pass down any pending signaled resumption for other
5659 threads not the current. */
5660 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5662 /* And continue others without a signal. */
5663 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5667 /* Scheduler locking; resume only PTID. */
5668 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5671 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5674 if (target_is_non_stop_p ())
5676 /* In non-stop, the stub replies to vCont with "OK". The stop
5677 reply will be reported asynchronously by means of a `%Stop'
5679 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5680 if (strcmp (rs
->buf
, "OK") != 0)
5681 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5687 /* Tell the remote machine to resume. */
5690 remote_resume (struct target_ops
*ops
,
5691 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5693 struct remote_state
*rs
= get_remote_state ();
5695 /* When connected in non-stop mode, the core resumes threads
5696 individually. Resuming remote threads directly in target_resume
5697 would thus result in sending one packet per thread. Instead, to
5698 minimize roundtrip latency, here we just store the resume
5699 request; the actual remote resumption will be done in
5700 target_commit_resume / remote_commit_resume, where we'll be able
5701 to do vCont action coalescing. */
5702 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5704 remote_thread_info
*remote_thr
;
5706 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5707 remote_thr
= get_remote_thread_info (inferior_ptid
);
5709 remote_thr
= get_remote_thread_info (ptid
);
5711 remote_thr
->last_resume_step
= step
;
5712 remote_thr
->last_resume_sig
= siggnal
;
5716 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5717 (explained in remote-notif.c:handle_notification) so
5718 remote_notif_process is not called. We need find a place where
5719 it is safe to start a 'vNotif' sequence. It is good to do it
5720 before resuming inferior, because inferior was stopped and no RSP
5721 traffic at that moment. */
5722 if (!target_is_non_stop_p ())
5723 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5725 rs
->last_resume_exec_dir
= execution_direction
;
5727 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5728 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5729 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5731 /* We are about to start executing the inferior, let's register it
5732 with the event loop. NOTE: this is the one place where all the
5733 execution commands end up. We could alternatively do this in each
5734 of the execution commands in infcmd.c. */
5735 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5736 into infcmd.c in order to allow inferior function calls to work
5737 NOT asynchronously. */
5738 if (target_can_async_p ())
5741 /* We've just told the target to resume. The remote server will
5742 wait for the inferior to stop, and then send a stop reply. In
5743 the mean time, we can't start another command/query ourselves
5744 because the stub wouldn't be ready to process it. This applies
5745 only to the base all-stop protocol, however. In non-stop (which
5746 only supports vCont), the stub replies with an "OK", and is
5747 immediate able to process further serial input. */
5748 if (!target_is_non_stop_p ())
5749 rs
->waiting_for_stop_reply
= 1;
5752 static void check_pending_events_prevent_wildcard_vcont
5753 (int *may_global_wildcard_vcont
);
5754 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5756 /* Private per-inferior info for target remote processes. */
5758 struct remote_inferior
: public private_inferior
5760 /* Whether we can send a wildcard vCont for this process. */
5761 bool may_wildcard_vcont
= true;
5764 /* Get the remote private inferior data associated to INF. */
5766 static remote_inferior
*
5767 get_remote_inferior (inferior
*inf
)
5769 if (inf
->priv
== NULL
)
5770 inf
->priv
.reset (new remote_inferior
);
5772 return static_cast<remote_inferior
*> (inf
->priv
.get ());
5775 /* Structure used to track the construction of a vCont packet in the
5776 outgoing packet buffer. This is used to send multiple vCont
5777 packets if we have more actions than would fit a single packet. */
5779 struct vcont_builder
5781 /* Pointer to the first action. P points here if no action has been
5785 /* Where the next action will be appended. */
5788 /* The end of the buffer. Must never write past this. */
5792 /* Prepare the outgoing buffer for a new vCont packet. */
5795 vcont_builder_restart (struct vcont_builder
*builder
)
5797 struct remote_state
*rs
= get_remote_state ();
5799 builder
->p
= rs
->buf
;
5800 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5801 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5802 builder
->first_action
= builder
->p
;
5805 /* If the vCont packet being built has any action, send it to the
5809 vcont_builder_flush (struct vcont_builder
*builder
)
5811 struct remote_state
*rs
;
5813 if (builder
->p
== builder
->first_action
)
5816 rs
= get_remote_state ();
5818 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5819 if (strcmp (rs
->buf
, "OK") != 0)
5820 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5823 /* The largest action is range-stepping, with its two addresses. This
5824 is more than sufficient. If a new, bigger action is created, it'll
5825 quickly trigger a failed assertion in append_resumption (and we'll
5827 #define MAX_ACTION_SIZE 200
5829 /* Append a new vCont action in the outgoing packet being built. If
5830 the action doesn't fit the packet along with previous actions, push
5831 what we've got so far to the remote end and start over a new vCont
5832 packet (with the new action). */
5835 vcont_builder_push_action (struct vcont_builder
*builder
,
5836 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5838 char buf
[MAX_ACTION_SIZE
+ 1];
5842 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5843 ptid
, step
, siggnal
);
5845 /* Check whether this new action would fit in the vCont packet along
5846 with previous actions. If not, send what we've got so far and
5847 start a new vCont packet. */
5849 if (rsize
> builder
->endp
- builder
->p
)
5851 vcont_builder_flush (builder
);
5852 vcont_builder_restart (builder
);
5854 /* Should now fit. */
5855 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5858 memcpy (builder
->p
, buf
, rsize
);
5859 builder
->p
+= rsize
;
5863 /* to_commit_resume implementation. */
5866 remote_commit_resume (struct target_ops
*ops
)
5868 struct inferior
*inf
;
5869 struct thread_info
*tp
;
5870 int any_process_wildcard
;
5871 int may_global_wildcard_vcont
;
5872 struct vcont_builder vcont_builder
;
5874 /* If connected in all-stop mode, we'd send the remote resume
5875 request directly from remote_resume. Likewise if
5876 reverse-debugging, as there are no defined vCont actions for
5877 reverse execution. */
5878 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5881 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5882 instead of resuming all threads of each process individually.
5883 However, if any thread of a process must remain halted, we can't
5884 send wildcard resumes and must send one action per thread.
5886 Care must be taken to not resume threads/processes the server
5887 side already told us are stopped, but the core doesn't know about
5888 yet, because the events are still in the vStopped notification
5891 #1 => vCont s:p1.1;c
5893 #3 <= %Stopped T05 p1.1
5898 #8 (infrun handles the stop for p1.1 and continues stepping)
5899 #9 => vCont s:p1.1;c
5901 The last vCont above would resume thread p1.2 by mistake, because
5902 the server has no idea that the event for p1.2 had not been
5905 The server side must similarly ignore resume actions for the
5906 thread that has a pending %Stopped notification (and any other
5907 threads with events pending), until GDB acks the notification
5908 with vStopped. Otherwise, e.g., the following case is
5911 #1 => g (or any other packet)
5913 #3 <= %Stopped T05 p1.2
5914 #4 => vCont s:p1.1;c
5917 Above, the server must not resume thread p1.2. GDB can't know
5918 that p1.2 stopped until it acks the %Stopped notification, and
5919 since from GDB's perspective all threads should be running, it
5922 Finally, special care must also be given to handling fork/vfork
5923 events. A (v)fork event actually tells us that two processes
5924 stopped -- the parent and the child. Until we follow the fork,
5925 we must not resume the child. Therefore, if we have a pending
5926 fork follow, we must not send a global wildcard resume action
5927 (vCont;c). We can still send process-wide wildcards though. */
5929 /* Start by assuming a global wildcard (vCont;c) is possible. */
5930 may_global_wildcard_vcont
= 1;
5932 /* And assume every process is individually wildcard-able too. */
5933 ALL_NON_EXITED_INFERIORS (inf
)
5935 remote_inferior
*priv
= get_remote_inferior (inf
);
5937 priv
->may_wildcard_vcont
= true;
5940 /* Check for any pending events (not reported or processed yet) and
5941 disable process and global wildcard resumes appropriately. */
5942 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
5944 ALL_NON_EXITED_THREADS (tp
)
5946 /* If a thread of a process is not meant to be resumed, then we
5947 can't wildcard that process. */
5950 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
5952 /* And if we can't wildcard a process, we can't wildcard
5953 everything either. */
5954 may_global_wildcard_vcont
= 0;
5958 /* If a thread is the parent of an unfollowed fork, then we
5959 can't do a global wildcard, as that would resume the fork
5961 if (is_pending_fork_parent_thread (tp
))
5962 may_global_wildcard_vcont
= 0;
5965 /* Now let's build the vCont packet(s). Actions must be appended
5966 from narrower to wider scopes (thread -> process -> global). If
5967 we end up with too many actions for a single packet vcont_builder
5968 flushes the current vCont packet to the remote side and starts a
5970 vcont_builder_restart (&vcont_builder
);
5972 /* Threads first. */
5973 ALL_NON_EXITED_THREADS (tp
)
5975 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
5977 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
5980 gdb_assert (!thread_is_in_step_over_chain (tp
));
5982 if (!remote_thr
->last_resume_step
5983 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
5984 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
5986 /* We'll send a wildcard resume instead. */
5987 remote_thr
->vcont_resumed
= 1;
5991 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
5992 remote_thr
->last_resume_step
,
5993 remote_thr
->last_resume_sig
);
5994 remote_thr
->vcont_resumed
= 1;
5997 /* Now check whether we can send any process-wide wildcard. This is
5998 to avoid sending a global wildcard in the case nothing is
5999 supposed to be resumed. */
6000 any_process_wildcard
= 0;
6002 ALL_NON_EXITED_INFERIORS (inf
)
6004 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6006 any_process_wildcard
= 1;
6011 if (any_process_wildcard
)
6013 /* If all processes are wildcard-able, then send a single "c"
6014 action, otherwise, send an "all (-1) threads of process"
6015 continue action for each running process, if any. */
6016 if (may_global_wildcard_vcont
)
6018 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6023 ALL_NON_EXITED_INFERIORS (inf
)
6025 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6027 vcont_builder_push_action (&vcont_builder
,
6028 pid_to_ptid (inf
->pid
),
6035 vcont_builder_flush (&vcont_builder
);
6040 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6041 thread, all threads of a remote process, or all threads of all
6045 remote_stop_ns (ptid_t ptid
)
6047 struct remote_state
*rs
= get_remote_state ();
6049 char *endp
= rs
->buf
+ get_remote_packet_size ();
6051 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6052 remote_vcont_probe (rs
);
6054 if (!rs
->supports_vCont
.t
)
6055 error (_("Remote server does not support stopping threads"));
6057 if (ptid_equal (ptid
, minus_one_ptid
)
6058 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6059 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6064 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6066 if (ptid_is_pid (ptid
))
6067 /* All (-1) threads of process. */
6068 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6071 /* Small optimization: if we already have a stop reply for
6072 this thread, no use in telling the stub we want this
6074 if (peek_stop_reply (ptid
))
6080 write_ptid (p
, endp
, nptid
);
6083 /* In non-stop, we get an immediate OK reply. The stop reply will
6084 come in asynchronously by notification. */
6086 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6087 if (strcmp (rs
->buf
, "OK") != 0)
6088 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6091 /* All-stop version of target_interrupt. Sends a break or a ^C to
6092 interrupt the remote target. It is undefined which thread of which
6093 process reports the interrupt. */
6096 remote_interrupt_as (void)
6098 struct remote_state
*rs
= get_remote_state ();
6100 rs
->ctrlc_pending_p
= 1;
6102 /* If the inferior is stopped already, but the core didn't know
6103 about it yet, just ignore the request. The cached wait status
6104 will be collected in remote_wait. */
6105 if (rs
->cached_wait_status
)
6108 /* Send interrupt_sequence to remote target. */
6109 send_interrupt_sequence ();
6112 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6113 the remote target. It is undefined which thread of which process
6114 reports the interrupt. Throws an error if the packet is not
6115 supported by the server. */
6118 remote_interrupt_ns (void)
6120 struct remote_state
*rs
= get_remote_state ();
6122 char *endp
= rs
->buf
+ get_remote_packet_size ();
6124 xsnprintf (p
, endp
- p
, "vCtrlC");
6126 /* In non-stop, we get an immediate OK reply. The stop reply will
6127 come in asynchronously by notification. */
6129 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6131 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6135 case PACKET_UNKNOWN
:
6136 error (_("No support for interrupting the remote target."));
6138 error (_("Interrupting target failed: %s"), rs
->buf
);
6142 /* Implement the to_stop function for the remote targets. */
6145 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6148 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6150 if (target_is_non_stop_p ())
6151 remote_stop_ns (ptid
);
6154 /* We don't currently have a way to transparently pause the
6155 remote target in all-stop mode. Interrupt it instead. */
6156 remote_interrupt_as ();
6160 /* Implement the to_interrupt function for the remote targets. */
6163 remote_interrupt (struct target_ops
*self
)
6166 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6168 if (target_is_non_stop_p ())
6169 remote_interrupt_ns ();
6171 remote_interrupt_as ();
6174 /* Implement the to_pass_ctrlc function for the remote targets. */
6177 remote_pass_ctrlc (struct target_ops
*self
)
6179 struct remote_state
*rs
= get_remote_state ();
6182 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6184 /* If we're starting up, we're not fully synced yet. Quit
6186 if (rs
->starting_up
)
6188 /* If ^C has already been sent once, offer to disconnect. */
6189 else if (rs
->ctrlc_pending_p
)
6192 target_interrupt ();
6195 /* Ask the user what to do when an interrupt is received. */
6198 interrupt_query (void)
6200 struct remote_state
*rs
= get_remote_state ();
6202 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6204 if (query (_("The target is not responding to interrupt requests.\n"
6205 "Stop debugging it? ")))
6207 remote_unpush_target ();
6208 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6213 if (query (_("Interrupted while waiting for the program.\n"
6214 "Give up waiting? ")))
6219 /* Enable/disable target terminal ownership. Most targets can use
6220 terminal groups to control terminal ownership. Remote targets are
6221 different in that explicit transfer of ownership to/from GDB/target
6225 remote_terminal_inferior (struct target_ops
*self
)
6227 /* NOTE: At this point we could also register our selves as the
6228 recipient of all input. Any characters typed could then be
6229 passed on down to the target. */
6233 remote_terminal_ours (struct target_ops
*self
)
6238 remote_console_output (char *msg
)
6242 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6245 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6249 fputs_unfiltered (tb
, gdb_stdtarg
);
6251 gdb_flush (gdb_stdtarg
);
6254 DEF_VEC_O(cached_reg_t
);
6256 typedef struct stop_reply
6258 struct notif_event base
;
6260 /* The identifier of the thread about this event */
6263 /* The remote state this event is associated with. When the remote
6264 connection, represented by a remote_state object, is closed,
6265 all the associated stop_reply events should be released. */
6266 struct remote_state
*rs
;
6268 struct target_waitstatus ws
;
6270 /* The architecture associated with the expedited registers. */
6273 /* Expedited registers. This makes remote debugging a bit more
6274 efficient for those targets that provide critical registers as
6275 part of their normal status mechanism (as another roundtrip to
6276 fetch them is avoided). */
6277 VEC(cached_reg_t
) *regcache
;
6279 enum target_stop_reason stop_reason
;
6281 CORE_ADDR watch_data_address
;
6286 DECLARE_QUEUE_P (stop_reply_p
);
6287 DEFINE_QUEUE_P (stop_reply_p
);
6288 /* The list of already fetched and acknowledged stop events. This
6289 queue is used for notification Stop, and other notifications
6290 don't need queue for their events, because the notification events
6291 of Stop can't be consumed immediately, so that events should be
6292 queued first, and be consumed by remote_wait_{ns,as} one per
6293 time. Other notifications can consume their events immediately,
6294 so queue is not needed for them. */
6295 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6298 stop_reply_xfree (struct stop_reply
*r
)
6300 notif_event_xfree ((struct notif_event
*) r
);
6303 /* Return the length of the stop reply queue. */
6306 stop_reply_queue_length (void)
6308 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6312 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6313 struct notif_event
*event
)
6315 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6319 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6320 struct notif_event
*event
)
6322 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6325 putpkt (self
->ack_command
);
6327 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6328 /* We got an unknown stop reply. */
6329 error (_("Unknown stop reply"));
6331 push_stop_reply (stop_reply
);
6335 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6337 /* We can't get pending events in remote_notif_process for
6338 notification stop, and we have to do this in remote_wait_ns
6339 instead. If we fetch all queued events from stub, remote stub
6340 may exit and we have no chance to process them back in
6342 mark_async_event_handler (remote_async_inferior_event_token
);
6347 stop_reply_dtr (struct notif_event
*event
)
6349 struct stop_reply
*r
= (struct stop_reply
*) event
;
6354 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6358 VEC_free (cached_reg_t
, r
->regcache
);
6361 static struct notif_event
*
6362 remote_notif_stop_alloc_reply (void)
6364 /* We cast to a pointer to the "base class". */
6365 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6367 r
->dtr
= stop_reply_dtr
;
6372 /* A client of notification Stop. */
6374 struct notif_client notif_client_stop
=
6378 remote_notif_stop_parse
,
6379 remote_notif_stop_ack
,
6380 remote_notif_stop_can_get_pending_events
,
6381 remote_notif_stop_alloc_reply
,
6385 /* A parameter to pass data in and out. */
6387 struct queue_iter_param
6390 struct stop_reply
*output
;
6393 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6394 the pid of the process that owns the threads we want to check, or
6395 -1 if we want to check all threads. */
6398 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6401 if (ws
->kind
== TARGET_WAITKIND_FORKED
6402 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6404 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6411 /* Return the thread's pending status used to determine whether the
6412 thread is a fork parent stopped at a fork event. */
6414 static struct target_waitstatus
*
6415 thread_pending_fork_status (struct thread_info
*thread
)
6417 if (thread
->suspend
.waitstatus_pending_p
)
6418 return &thread
->suspend
.waitstatus
;
6420 return &thread
->pending_follow
;
6423 /* Determine if THREAD is a pending fork parent thread. */
6426 is_pending_fork_parent_thread (struct thread_info
*thread
)
6428 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6431 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6434 /* Check whether EVENT is a fork event, and if it is, remove the
6435 fork child from the context list passed in DATA. */
6438 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6439 QUEUE_ITER (stop_reply_p
) *iter
,
6443 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6444 struct threads_listing_context
*context
6445 = (struct threads_listing_context
*) param
->input
;
6447 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6448 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6449 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6450 context
->remove_thread (event
->ws
.value
.related_pid
);
6455 /* If CONTEXT contains any fork child threads that have not been
6456 reported yet, remove them from the CONTEXT list. If such a
6457 thread exists it is because we are stopped at a fork catchpoint
6458 and have not yet called follow_fork, which will set up the
6459 host-side data structures for the new process. */
6462 remove_new_fork_children (struct threads_listing_context
*context
)
6464 struct thread_info
* thread
;
6466 struct notif_client
*notif
= ¬if_client_stop
;
6467 struct queue_iter_param param
;
6469 /* For any threads stopped at a fork event, remove the corresponding
6470 fork child threads from the CONTEXT list. */
6471 ALL_NON_EXITED_THREADS (thread
)
6473 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6475 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6476 context
->remove_thread (ws
->value
.related_pid
);
6479 /* Check for any pending fork events (not reported or processed yet)
6480 in process PID and remove those fork child threads from the
6481 CONTEXT list as well. */
6482 remote_notif_get_pending_events (notif
);
6483 param
.input
= context
;
6484 param
.output
= NULL
;
6485 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6486 remove_child_of_pending_fork
, ¶m
);
6489 /* Check whether EVENT would prevent a global or process wildcard
6493 check_pending_event_prevents_wildcard_vcont_callback
6494 (QUEUE (stop_reply_p
) *q
,
6495 QUEUE_ITER (stop_reply_p
) *iter
,
6499 struct inferior
*inf
;
6500 int *may_global_wildcard_vcont
= (int *) data
;
6502 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6503 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6506 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6507 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6508 *may_global_wildcard_vcont
= 0;
6510 inf
= find_inferior_ptid (event
->ptid
);
6512 /* This may be the first time we heard about this process.
6513 Regardless, we must not do a global wildcard resume, otherwise
6514 we'd resume this process too. */
6515 *may_global_wildcard_vcont
= 0;
6517 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
6522 /* Check whether any event pending in the vStopped queue would prevent
6523 a global or process wildcard vCont action. Clear
6524 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6525 and clear the event inferior's may_wildcard_vcont flag if we can't
6526 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6529 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6531 struct notif_client
*notif
= ¬if_client_stop
;
6533 remote_notif_get_pending_events (notif
);
6534 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6535 check_pending_event_prevents_wildcard_vcont_callback
,
6536 may_global_wildcard
);
6539 /* Remove stop replies in the queue if its pid is equal to the given
6543 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6544 QUEUE_ITER (stop_reply_p
) *iter
,
6548 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6549 struct inferior
*inf
= (struct inferior
*) param
->input
;
6551 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6553 stop_reply_xfree (event
);
6554 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6560 /* Discard all pending stop replies of inferior INF. */
6563 discard_pending_stop_replies (struct inferior
*inf
)
6565 struct queue_iter_param param
;
6566 struct stop_reply
*reply
;
6567 struct remote_state
*rs
= get_remote_state ();
6568 struct remote_notif_state
*rns
= rs
->notif_state
;
6570 /* This function can be notified when an inferior exists. When the
6571 target is not remote, the notification state is NULL. */
6572 if (rs
->remote_desc
== NULL
)
6575 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6577 /* Discard the in-flight notification. */
6578 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6580 stop_reply_xfree (reply
);
6581 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6585 param
.output
= NULL
;
6586 /* Discard the stop replies we have already pulled with
6588 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6589 remove_stop_reply_for_inferior
, ¶m
);
6592 /* If its remote state is equal to the given remote state,
6593 remove EVENT from the stop reply queue. */
6596 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6597 QUEUE_ITER (stop_reply_p
) *iter
,
6601 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6602 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6604 if (event
->rs
== rs
)
6606 stop_reply_xfree (event
);
6607 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6613 /* Discard the stop replies for RS in stop_reply_queue. */
6616 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6618 struct queue_iter_param param
;
6621 param
.output
= NULL
;
6622 /* Discard the stop replies we have already pulled with
6624 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6625 remove_stop_reply_of_remote_state
, ¶m
);
6628 /* A parameter to pass data in and out. */
6631 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6632 QUEUE_ITER (stop_reply_p
) *iter
,
6636 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6637 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6639 if (ptid_match (event
->ptid
, *ptid
))
6641 param
->output
= event
;
6642 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6649 /* Remove the first reply in 'stop_reply_queue' which matches
6652 static struct stop_reply
*
6653 remote_notif_remove_queued_reply (ptid_t ptid
)
6655 struct queue_iter_param param
;
6657 param
.input
= &ptid
;
6658 param
.output
= NULL
;
6660 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6661 remote_notif_remove_once_on_match
, ¶m
);
6663 fprintf_unfiltered (gdb_stdlog
,
6664 "notif: discard queued event: 'Stop' in %s\n",
6665 target_pid_to_str (ptid
));
6667 return param
.output
;
6670 /* Look for a queued stop reply belonging to PTID. If one is found,
6671 remove it from the queue, and return it. Returns NULL if none is
6672 found. If there are still queued events left to process, tell the
6673 event loop to get back to target_wait soon. */
6675 static struct stop_reply
*
6676 queued_stop_reply (ptid_t ptid
)
6678 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6680 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6681 /* There's still at least an event left. */
6682 mark_async_event_handler (remote_async_inferior_event_token
);
6687 /* Push a fully parsed stop reply in the stop reply queue. Since we
6688 know that we now have at least one queued event left to pass to the
6689 core side, tell the event loop to get back to target_wait soon. */
6692 push_stop_reply (struct stop_reply
*new_event
)
6694 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6697 fprintf_unfiltered (gdb_stdlog
,
6698 "notif: push 'Stop' %s to queue %d\n",
6699 target_pid_to_str (new_event
->ptid
),
6700 QUEUE_length (stop_reply_p
,
6703 mark_async_event_handler (remote_async_inferior_event_token
);
6707 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6708 QUEUE_ITER (stop_reply_p
) *iter
,
6709 struct stop_reply
*event
,
6712 ptid_t
*ptid
= (ptid_t
*) data
;
6714 return !(ptid_equal (*ptid
, event
->ptid
)
6715 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6718 /* Returns true if we have a stop reply for PTID. */
6721 peek_stop_reply (ptid_t ptid
)
6723 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6724 stop_reply_match_ptid_and_ws
, &ptid
);
6727 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6728 starting with P and ending with PEND matches PREFIX. */
6731 strprefix (const char *p
, const char *pend
, const char *prefix
)
6733 for ( ; p
< pend
; p
++, prefix
++)
6736 return *prefix
== '\0';
6739 /* Parse the stop reply in BUF. Either the function succeeds, and the
6740 result is stored in EVENT, or throws an error. */
6743 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6745 remote_arch_state
*rsa
= NULL
;
6750 event
->ptid
= null_ptid
;
6751 event
->rs
= get_remote_state ();
6752 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6753 event
->ws
.value
.integer
= 0;
6754 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6755 event
->regcache
= NULL
;
6760 case 'T': /* Status with PC, SP, FP, ... */
6761 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6762 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6764 n... = register number
6765 r... = register contents
6768 p
= &buf
[3]; /* after Txx */
6774 p1
= strchr (p
, ':');
6776 error (_("Malformed packet(a) (missing colon): %s\n\
6780 error (_("Malformed packet(a) (missing register number): %s\n\
6784 /* Some "registers" are actually extended stop information.
6785 Note if you're adding a new entry here: GDB 7.9 and
6786 earlier assume that all register "numbers" that start
6787 with an hex digit are real register numbers. Make sure
6788 the server only sends such a packet if it knows the
6789 client understands it. */
6791 if (strprefix (p
, p1
, "thread"))
6792 event
->ptid
= read_ptid (++p1
, &p
);
6793 else if (strprefix (p
, p1
, "syscall_entry"))
6797 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6798 p
= unpack_varlen_hex (++p1
, &sysno
);
6799 event
->ws
.value
.syscall_number
= (int) sysno
;
6801 else if (strprefix (p
, p1
, "syscall_return"))
6805 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6806 p
= unpack_varlen_hex (++p1
, &sysno
);
6807 event
->ws
.value
.syscall_number
= (int) sysno
;
6809 else if (strprefix (p
, p1
, "watch")
6810 || strprefix (p
, p1
, "rwatch")
6811 || strprefix (p
, p1
, "awatch"))
6813 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6814 p
= unpack_varlen_hex (++p1
, &addr
);
6815 event
->watch_data_address
= (CORE_ADDR
) addr
;
6817 else if (strprefix (p
, p1
, "swbreak"))
6819 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6821 /* Make sure the stub doesn't forget to indicate support
6823 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6824 error (_("Unexpected swbreak stop reason"));
6826 /* The value part is documented as "must be empty",
6827 though we ignore it, in case we ever decide to make
6828 use of it in a backward compatible way. */
6829 p
= strchrnul (p1
+ 1, ';');
6831 else if (strprefix (p
, p1
, "hwbreak"))
6833 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6835 /* Make sure the stub doesn't forget to indicate support
6837 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6838 error (_("Unexpected hwbreak stop reason"));
6841 p
= strchrnul (p1
+ 1, ';');
6843 else if (strprefix (p
, p1
, "library"))
6845 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6846 p
= strchrnul (p1
+ 1, ';');
6848 else if (strprefix (p
, p1
, "replaylog"))
6850 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6851 /* p1 will indicate "begin" or "end", but it makes
6852 no difference for now, so ignore it. */
6853 p
= strchrnul (p1
+ 1, ';');
6855 else if (strprefix (p
, p1
, "core"))
6859 p
= unpack_varlen_hex (++p1
, &c
);
6862 else if (strprefix (p
, p1
, "fork"))
6864 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6865 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6867 else if (strprefix (p
, p1
, "vfork"))
6869 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6870 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6872 else if (strprefix (p
, p1
, "vforkdone"))
6874 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6875 p
= strchrnul (p1
+ 1, ';');
6877 else if (strprefix (p
, p1
, "exec"))
6880 char pathname
[PATH_MAX
];
6883 /* Determine the length of the execd pathname. */
6884 p
= unpack_varlen_hex (++p1
, &ignored
);
6885 pathlen
= (p
- p1
) / 2;
6887 /* Save the pathname for event reporting and for
6888 the next run command. */
6889 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6890 pathname
[pathlen
] = '\0';
6892 /* This is freed during event handling. */
6893 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6894 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6896 /* Skip the registers included in this packet, since
6897 they may be for an architecture different from the
6898 one used by the original program. */
6901 else if (strprefix (p
, p1
, "create"))
6903 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6904 p
= strchrnul (p1
+ 1, ';');
6913 p
= strchrnul (p1
+ 1, ';');
6918 /* Maybe a real ``P'' register number. */
6919 p_temp
= unpack_varlen_hex (p
, &pnum
);
6920 /* If the first invalid character is the colon, we got a
6921 register number. Otherwise, it's an unknown stop
6925 /* If we haven't parsed the event's thread yet, find
6926 it now, in order to find the architecture of the
6927 reported expedited registers. */
6928 if (event
->ptid
== null_ptid
)
6930 const char *thr
= strstr (p1
+ 1, ";thread:");
6932 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
6936 /* Either the current thread hasn't changed,
6937 or the inferior is not multi-threaded.
6938 The event must be for the thread we last
6939 set as (or learned as being) current. */
6940 event
->ptid
= event
->rs
->general_thread
;
6946 inferior
*inf
= (event
->ptid
== null_ptid
6948 : find_inferior_ptid (event
->ptid
));
6949 /* If this is the first time we learn anything
6950 about this process, skip the registers
6951 included in this packet, since we don't yet
6952 know which architecture to use to parse them.
6953 We'll determine the architecture later when
6954 we process the stop reply and retrieve the
6955 target description, via
6956 remote_notice_new_inferior ->
6957 post_create_inferior. */
6960 p
= strchrnul (p1
+ 1, ';');
6965 event
->arch
= inf
->gdbarch
;
6966 rsa
= get_remote_arch_state (event
->arch
);
6970 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
6971 cached_reg_t cached_reg
;
6974 error (_("Remote sent bad register number %s: %s\n\
6976 hex_string (pnum
), p
, buf
);
6978 cached_reg
.num
= reg
->regnum
;
6979 cached_reg
.data
= (gdb_byte
*)
6980 xmalloc (register_size (event
->arch
, reg
->regnum
));
6983 fieldsize
= hex2bin (p
, cached_reg
.data
,
6984 register_size (event
->arch
, reg
->regnum
));
6986 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
6987 warning (_("Remote reply is too short: %s"), buf
);
6989 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
6993 /* Not a number. Silently skip unknown optional
6995 p
= strchrnul (p1
+ 1, ';');
7000 error (_("Remote register badly formatted: %s\nhere: %s"),
7005 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7009 case 'S': /* Old style status, just signal only. */
7013 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7014 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7015 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7016 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7018 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7021 case 'w': /* Thread exited. */
7026 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7027 p
= unpack_varlen_hex (&buf
[1], &value
);
7028 event
->ws
.value
.integer
= value
;
7030 error (_("stop reply packet badly formatted: %s"), buf
);
7031 event
->ptid
= read_ptid (++p
, NULL
);
7034 case 'W': /* Target exited. */
7041 /* GDB used to accept only 2 hex chars here. Stubs should
7042 only send more if they detect GDB supports multi-process
7044 p
= unpack_varlen_hex (&buf
[1], &value
);
7048 /* The remote process exited. */
7049 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7050 event
->ws
.value
.integer
= value
;
7054 /* The remote process exited with a signal. */
7055 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7056 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7057 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7059 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7062 /* If no process is specified, assume inferior_ptid. */
7063 pid
= ptid_get_pid (inferior_ptid
);
7072 else if (startswith (p
, "process:"))
7076 p
+= sizeof ("process:") - 1;
7077 unpack_varlen_hex (p
, &upid
);
7081 error (_("unknown stop reply packet: %s"), buf
);
7084 error (_("unknown stop reply packet: %s"), buf
);
7085 event
->ptid
= pid_to_ptid (pid
);
7089 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7090 event
->ptid
= minus_one_ptid
;
7094 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7095 error (_("No process or thread specified in stop reply: %s"), buf
);
7098 /* When the stub wants to tell GDB about a new notification reply, it
7099 sends a notification (%Stop, for example). Those can come it at
7100 any time, hence, we have to make sure that any pending
7101 putpkt/getpkt sequence we're making is finished, before querying
7102 the stub for more events with the corresponding ack command
7103 (vStopped, for example). E.g., if we started a vStopped sequence
7104 immediately upon receiving the notification, something like this
7112 1.6) <-- (registers reply to step #1.3)
7114 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7117 To solve this, whenever we parse a %Stop notification successfully,
7118 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7119 doing whatever we were doing:
7125 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7126 2.5) <-- (registers reply to step #2.3)
7128 Eventualy after step #2.5, we return to the event loop, which
7129 notices there's an event on the
7130 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7131 associated callback --- the function below. At this point, we're
7132 always safe to start a vStopped sequence. :
7135 2.7) <-- T05 thread:2
7141 remote_notif_get_pending_events (struct notif_client
*nc
)
7143 struct remote_state
*rs
= get_remote_state ();
7145 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7148 fprintf_unfiltered (gdb_stdlog
,
7149 "notif: process: '%s' ack pending event\n",
7153 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7154 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7158 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7159 if (strcmp (rs
->buf
, "OK") == 0)
7162 remote_notif_ack (nc
, rs
->buf
);
7168 fprintf_unfiltered (gdb_stdlog
,
7169 "notif: process: '%s' no pending reply\n",
7174 /* Called when it is decided that STOP_REPLY holds the info of the
7175 event that is to be returned to the core. This function always
7176 destroys STOP_REPLY. */
7179 process_stop_reply (struct stop_reply
*stop_reply
,
7180 struct target_waitstatus
*status
)
7184 *status
= stop_reply
->ws
;
7185 ptid
= stop_reply
->ptid
;
7187 /* If no thread/process was reported by the stub, assume the current
7189 if (ptid_equal (ptid
, null_ptid
))
7190 ptid
= inferior_ptid
;
7192 if (status
->kind
!= TARGET_WAITKIND_EXITED
7193 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7194 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7196 /* Expedited registers. */
7197 if (stop_reply
->regcache
)
7199 struct regcache
*regcache
7200 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7205 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7208 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7212 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7215 remote_notice_new_inferior (ptid
, 0);
7216 remote_thread_info
*remote_thr
= get_remote_thread_info (ptid
);
7217 remote_thr
->core
= stop_reply
->core
;
7218 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7219 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7220 remote_thr
->vcont_resumed
= 0;
7223 stop_reply_xfree (stop_reply
);
7227 /* The non-stop mode version of target_wait. */
7230 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7232 struct remote_state
*rs
= get_remote_state ();
7233 struct stop_reply
*stop_reply
;
7237 /* If in non-stop mode, get out of getpkt even if a
7238 notification is received. */
7240 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7241 0 /* forever */, &is_notif
);
7244 if (ret
!= -1 && !is_notif
)
7247 case 'E': /* Error of some sort. */
7248 /* We're out of sync with the target now. Did it continue
7249 or not? We can't tell which thread it was in non-stop,
7250 so just ignore this. */
7251 warning (_("Remote failure reply: %s"), rs
->buf
);
7253 case 'O': /* Console output. */
7254 remote_console_output (rs
->buf
+ 1);
7257 warning (_("Invalid remote reply: %s"), rs
->buf
);
7261 /* Acknowledge a pending stop reply that may have arrived in the
7263 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7264 remote_notif_get_pending_events (¬if_client_stop
);
7266 /* If indeed we noticed a stop reply, we're done. */
7267 stop_reply
= queued_stop_reply (ptid
);
7268 if (stop_reply
!= NULL
)
7269 return process_stop_reply (stop_reply
, status
);
7271 /* Still no event. If we're just polling for an event, then
7272 return to the event loop. */
7273 if (options
& TARGET_WNOHANG
)
7275 status
->kind
= TARGET_WAITKIND_IGNORE
;
7276 return minus_one_ptid
;
7279 /* Otherwise do a blocking wait. */
7280 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7281 1 /* forever */, &is_notif
);
7285 /* Wait until the remote machine stops, then return, storing status in
7286 STATUS just as `wait' would. */
7289 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7291 struct remote_state
*rs
= get_remote_state ();
7292 ptid_t event_ptid
= null_ptid
;
7294 struct stop_reply
*stop_reply
;
7298 status
->kind
= TARGET_WAITKIND_IGNORE
;
7299 status
->value
.integer
= 0;
7301 stop_reply
= queued_stop_reply (ptid
);
7302 if (stop_reply
!= NULL
)
7303 return process_stop_reply (stop_reply
, status
);
7305 if (rs
->cached_wait_status
)
7306 /* Use the cached wait status, but only once. */
7307 rs
->cached_wait_status
= 0;
7312 int forever
= ((options
& TARGET_WNOHANG
) == 0
7313 && wait_forever_enabled_p
);
7315 if (!rs
->waiting_for_stop_reply
)
7317 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7318 return minus_one_ptid
;
7321 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7322 _never_ wait for ever -> test on target_is_async_p().
7323 However, before we do that we need to ensure that the caller
7324 knows how to take the target into/out of async mode. */
7325 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7326 forever
, &is_notif
);
7328 /* GDB gets a notification. Return to core as this event is
7330 if (ret
!= -1 && is_notif
)
7331 return minus_one_ptid
;
7333 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7334 return minus_one_ptid
;
7339 /* Assume that the target has acknowledged Ctrl-C unless we receive
7340 an 'F' or 'O' packet. */
7341 if (buf
[0] != 'F' && buf
[0] != 'O')
7342 rs
->ctrlc_pending_p
= 0;
7346 case 'E': /* Error of some sort. */
7347 /* We're out of sync with the target now. Did it continue or
7348 not? Not is more likely, so report a stop. */
7349 rs
->waiting_for_stop_reply
= 0;
7351 warning (_("Remote failure reply: %s"), buf
);
7352 status
->kind
= TARGET_WAITKIND_STOPPED
;
7353 status
->value
.sig
= GDB_SIGNAL_0
;
7355 case 'F': /* File-I/O request. */
7356 /* GDB may access the inferior memory while handling the File-I/O
7357 request, but we don't want GDB accessing memory while waiting
7358 for a stop reply. See the comments in putpkt_binary. Set
7359 waiting_for_stop_reply to 0 temporarily. */
7360 rs
->waiting_for_stop_reply
= 0;
7361 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7362 rs
->ctrlc_pending_p
= 0;
7363 /* GDB handled the File-I/O request, and the target is running
7364 again. Keep waiting for events. */
7365 rs
->waiting_for_stop_reply
= 1;
7367 case 'N': case 'T': case 'S': case 'X': case 'W':
7369 struct stop_reply
*stop_reply
;
7371 /* There is a stop reply to handle. */
7372 rs
->waiting_for_stop_reply
= 0;
7375 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7378 event_ptid
= process_stop_reply (stop_reply
, status
);
7381 case 'O': /* Console output. */
7382 remote_console_output (buf
+ 1);
7385 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7387 /* Zero length reply means that we tried 'S' or 'C' and the
7388 remote system doesn't support it. */
7389 target_terminal::ours_for_output ();
7391 ("Can't send signals to this remote system. %s not sent.\n",
7392 gdb_signal_to_name (rs
->last_sent_signal
));
7393 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7394 target_terminal::inferior ();
7396 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7400 /* else fallthrough */
7402 warning (_("Invalid remote reply: %s"), buf
);
7406 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7407 return minus_one_ptid
;
7408 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7410 /* Nothing interesting happened. If we're doing a non-blocking
7411 poll, we're done. Otherwise, go back to waiting. */
7412 if (options
& TARGET_WNOHANG
)
7413 return minus_one_ptid
;
7417 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7418 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7420 if (!ptid_equal (event_ptid
, null_ptid
))
7421 record_currthread (rs
, event_ptid
);
7423 event_ptid
= inferior_ptid
;
7426 /* A process exit. Invalidate our notion of current thread. */
7427 record_currthread (rs
, minus_one_ptid
);
7432 /* Wait until the remote machine stops, then return, storing status in
7433 STATUS just as `wait' would. */
7436 remote_wait (struct target_ops
*ops
,
7437 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7441 if (target_is_non_stop_p ())
7442 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7444 event_ptid
= remote_wait_as (ptid
, status
, options
);
7446 if (target_is_async_p ())
7448 /* If there are are events left in the queue tell the event loop
7450 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7451 mark_async_event_handler (remote_async_inferior_event_token
);
7457 /* Fetch a single register using a 'p' packet. */
7460 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7462 struct gdbarch
*gdbarch
= regcache
->arch ();
7463 struct remote_state
*rs
= get_remote_state ();
7465 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7468 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7471 if (reg
->pnum
== -1)
7476 p
+= hexnumstr (p
, reg
->pnum
);
7479 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7483 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7487 case PACKET_UNKNOWN
:
7490 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7491 gdbarch_register_name (regcache
->arch (),
7496 /* If this register is unfetchable, tell the regcache. */
7499 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7503 /* Otherwise, parse and supply the value. */
7509 error (_("fetch_register_using_p: early buf termination"));
7511 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7514 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7518 /* Fetch the registers included in the target's 'g' packet. */
7521 send_g_packet (void)
7523 struct remote_state
*rs
= get_remote_state ();
7526 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7527 remote_send (&rs
->buf
, &rs
->buf_size
);
7529 /* We can get out of synch in various cases. If the first character
7530 in the buffer is not a hex character, assume that has happened
7531 and try to fetch another packet to read. */
7532 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7533 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7534 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7535 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7538 fprintf_unfiltered (gdb_stdlog
,
7539 "Bad register packet; fetching a new packet\n");
7540 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7543 buf_len
= strlen (rs
->buf
);
7545 /* Sanity check the received packet. */
7546 if (buf_len
% 2 != 0)
7547 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7553 process_g_packet (struct regcache
*regcache
)
7555 struct gdbarch
*gdbarch
= regcache
->arch ();
7556 struct remote_state
*rs
= get_remote_state ();
7557 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7562 buf_len
= strlen (rs
->buf
);
7564 /* Further sanity checks, with knowledge of the architecture. */
7565 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7566 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7567 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
7569 /* Save the size of the packet sent to us by the target. It is used
7570 as a heuristic when determining the max size of packets that the
7571 target can safely receive. */
7572 if (rsa
->actual_register_packet_size
== 0)
7573 rsa
->actual_register_packet_size
= buf_len
;
7575 /* If this is smaller than we guessed the 'g' packet would be,
7576 update our records. A 'g' reply that doesn't include a register's
7577 value implies either that the register is not available, or that
7578 the 'p' packet must be used. */
7579 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7581 long sizeof_g_packet
= buf_len
/ 2;
7583 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7585 long offset
= rsa
->regs
[i
].offset
;
7586 long reg_size
= register_size (gdbarch
, i
);
7588 if (rsa
->regs
[i
].pnum
== -1)
7591 if (offset
>= sizeof_g_packet
)
7592 rsa
->regs
[i
].in_g_packet
= 0;
7593 else if (offset
+ reg_size
> sizeof_g_packet
)
7594 error (_("Truncated register %d in remote 'g' packet"), i
);
7596 rsa
->regs
[i
].in_g_packet
= 1;
7599 /* Looks valid enough, we can assume this is the correct length
7600 for a 'g' packet. It's important not to adjust
7601 rsa->sizeof_g_packet if we have truncated registers otherwise
7602 this "if" won't be run the next time the method is called
7603 with a packet of the same size and one of the internal errors
7604 below will trigger instead. */
7605 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7608 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7610 /* Unimplemented registers read as all bits zero. */
7611 memset (regs
, 0, rsa
->sizeof_g_packet
);
7613 /* Reply describes registers byte by byte, each byte encoded as two
7614 hex characters. Suck them all up, then supply them to the
7615 register cacheing/storage mechanism. */
7618 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7620 if (p
[0] == 0 || p
[1] == 0)
7621 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7622 internal_error (__FILE__
, __LINE__
,
7623 _("unexpected end of 'g' packet reply"));
7625 if (p
[0] == 'x' && p
[1] == 'x')
7626 regs
[i
] = 0; /* 'x' */
7628 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7632 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7634 struct packet_reg
*r
= &rsa
->regs
[i
];
7635 long reg_size
= register_size (gdbarch
, i
);
7639 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7640 /* This shouldn't happen - we adjusted in_g_packet above. */
7641 internal_error (__FILE__
, __LINE__
,
7642 _("unexpected end of 'g' packet reply"));
7643 else if (rs
->buf
[r
->offset
* 2] == 'x')
7645 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7646 /* The register isn't available, mark it as such (at
7647 the same time setting the value to zero). */
7648 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7651 regcache_raw_supply (regcache
, r
->regnum
,
7658 fetch_registers_using_g (struct regcache
*regcache
)
7661 process_g_packet (regcache
);
7664 /* Make the remote selected traceframe match GDB's selected
7668 set_remote_traceframe (void)
7671 struct remote_state
*rs
= get_remote_state ();
7673 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7676 /* Avoid recursion, remote_trace_find calls us again. */
7677 rs
->remote_traceframe_number
= get_traceframe_number ();
7679 newnum
= target_trace_find (tfind_number
,
7680 get_traceframe_number (), 0, 0, NULL
);
7682 /* Should not happen. If it does, all bets are off. */
7683 if (newnum
!= get_traceframe_number ())
7684 warning (_("could not set remote traceframe"));
7688 remote_fetch_registers (struct target_ops
*ops
,
7689 struct regcache
*regcache
, int regnum
)
7691 struct gdbarch
*gdbarch
= regcache
->arch ();
7692 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7695 set_remote_traceframe ();
7696 set_general_thread (regcache_get_ptid (regcache
));
7700 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7702 gdb_assert (reg
!= NULL
);
7704 /* If this register might be in the 'g' packet, try that first -
7705 we are likely to read more than one register. If this is the
7706 first 'g' packet, we might be overly optimistic about its
7707 contents, so fall back to 'p'. */
7708 if (reg
->in_g_packet
)
7710 fetch_registers_using_g (regcache
);
7711 if (reg
->in_g_packet
)
7715 if (fetch_register_using_p (regcache
, reg
))
7718 /* This register is not available. */
7719 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7724 fetch_registers_using_g (regcache
);
7726 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7727 if (!rsa
->regs
[i
].in_g_packet
)
7728 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7730 /* This register is not available. */
7731 regcache_raw_supply (regcache
, i
, NULL
);
7735 /* Prepare to store registers. Since we may send them all (using a
7736 'G' request), we have to read out the ones we don't want to change
7740 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7742 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7745 /* Make sure the entire registers array is valid. */
7746 switch (packet_support (PACKET_P
))
7748 case PACKET_DISABLE
:
7749 case PACKET_SUPPORT_UNKNOWN
:
7750 /* Make sure all the necessary registers are cached. */
7751 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7752 if (rsa
->regs
[i
].in_g_packet
)
7753 regcache_raw_update (regcache
, rsa
->regs
[i
].regnum
);
7760 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7761 packet was not recognized. */
7764 store_register_using_P (const struct regcache
*regcache
,
7765 struct packet_reg
*reg
)
7767 struct gdbarch
*gdbarch
= regcache
->arch ();
7768 struct remote_state
*rs
= get_remote_state ();
7769 /* Try storing a single register. */
7770 char *buf
= rs
->buf
;
7771 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7774 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7777 if (reg
->pnum
== -1)
7780 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7781 p
= buf
+ strlen (buf
);
7782 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7783 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7785 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7787 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7792 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7793 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7794 case PACKET_UNKNOWN
:
7797 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7801 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7802 contents of the register cache buffer. FIXME: ignores errors. */
7805 store_registers_using_G (const struct regcache
*regcache
)
7807 struct remote_state
*rs
= get_remote_state ();
7808 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7812 /* Extract all the registers in the regcache copying them into a
7817 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7818 memset (regs
, 0, rsa
->sizeof_g_packet
);
7819 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7821 struct packet_reg
*r
= &rsa
->regs
[i
];
7824 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7828 /* Command describes registers byte by byte,
7829 each byte encoded as two hex characters. */
7832 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7834 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7835 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7836 error (_("Could not write registers; remote failure reply '%s'"),
7840 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7841 of the register cache buffer. FIXME: ignores errors. */
7844 remote_store_registers (struct target_ops
*ops
,
7845 struct regcache
*regcache
, int regnum
)
7847 struct gdbarch
*gdbarch
= regcache
->arch ();
7848 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7851 set_remote_traceframe ();
7852 set_general_thread (regcache_get_ptid (regcache
));
7856 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7858 gdb_assert (reg
!= NULL
);
7860 /* Always prefer to store registers using the 'P' packet if
7861 possible; we often change only a small number of registers.
7862 Sometimes we change a larger number; we'd need help from a
7863 higher layer to know to use 'G'. */
7864 if (store_register_using_P (regcache
, reg
))
7867 /* For now, don't complain if we have no way to write the
7868 register. GDB loses track of unavailable registers too
7869 easily. Some day, this may be an error. We don't have
7870 any way to read the register, either... */
7871 if (!reg
->in_g_packet
)
7874 store_registers_using_G (regcache
);
7878 store_registers_using_G (regcache
);
7880 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7881 if (!rsa
->regs
[i
].in_g_packet
)
7882 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7883 /* See above for why we do not issue an error here. */
7888 /* Return the number of hex digits in num. */
7891 hexnumlen (ULONGEST num
)
7895 for (i
= 0; num
!= 0; i
++)
7898 return std::max (i
, 1);
7901 /* Set BUF to the minimum number of hex digits representing NUM. */
7904 hexnumstr (char *buf
, ULONGEST num
)
7906 int len
= hexnumlen (num
);
7908 return hexnumnstr (buf
, num
, len
);
7912 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7915 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7921 for (i
= width
- 1; i
>= 0; i
--)
7923 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7930 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7933 remote_address_masked (CORE_ADDR addr
)
7935 unsigned int address_size
= remote_address_size
;
7937 /* If "remoteaddresssize" was not set, default to target address size. */
7939 address_size
= gdbarch_addr_bit (target_gdbarch ());
7941 if (address_size
> 0
7942 && address_size
< (sizeof (ULONGEST
) * 8))
7944 /* Only create a mask when that mask can safely be constructed
7945 in a ULONGEST variable. */
7948 mask
= (mask
<< address_size
) - 1;
7954 /* Determine whether the remote target supports binary downloading.
7955 This is accomplished by sending a no-op memory write of zero length
7956 to the target at the specified address. It does not suffice to send
7957 the whole packet, since many stubs strip the eighth bit and
7958 subsequently compute a wrong checksum, which causes real havoc with
7961 NOTE: This can still lose if the serial line is not eight-bit
7962 clean. In cases like this, the user should clear "remote
7966 check_binary_download (CORE_ADDR addr
)
7968 struct remote_state
*rs
= get_remote_state ();
7970 switch (packet_support (PACKET_X
))
7972 case PACKET_DISABLE
:
7976 case PACKET_SUPPORT_UNKNOWN
:
7982 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7984 p
+= hexnumstr (p
, (ULONGEST
) 0);
7988 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7989 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7991 if (rs
->buf
[0] == '\0')
7994 fprintf_unfiltered (gdb_stdlog
,
7995 "binary downloading NOT "
7996 "supported by target\n");
7997 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8002 fprintf_unfiltered (gdb_stdlog
,
8003 "binary downloading supported by target\n");
8004 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8011 /* Helper function to resize the payload in order to try to get a good
8012 alignment. We try to write an amount of data such that the next write will
8013 start on an address aligned on REMOTE_ALIGN_WRITES. */
8016 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8018 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8021 /* Write memory data directly to the remote machine.
8022 This does not inform the data cache; the data cache uses this.
8023 HEADER is the starting part of the packet.
8024 MEMADDR is the address in the remote memory space.
8025 MYADDR is the address of the buffer in our space.
8026 LEN_UNITS is the number of addressable units to write.
8027 UNIT_SIZE is the length in bytes of an addressable unit.
8028 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8029 should send data as binary ('X'), or hex-encoded ('M').
8031 The function creates packet of the form
8032 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8034 where encoding of <DATA> is terminated by PACKET_FORMAT.
8036 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8039 Return the transferred status, error or OK (an
8040 'enum target_xfer_status' value). Save the number of addressable units
8041 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8043 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8044 exchange between gdb and the stub could look like (?? in place of the
8050 -> $M1000,3:eeeeffffeeee#??
8054 <- eeeeffffeeeedddd */
8056 static enum target_xfer_status
8057 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8058 const gdb_byte
*myaddr
, ULONGEST len_units
,
8059 int unit_size
, ULONGEST
*xfered_len_units
,
8060 char packet_format
, int use_length
)
8062 struct remote_state
*rs
= get_remote_state ();
8068 int payload_capacity_bytes
;
8069 int payload_length_bytes
;
8071 if (packet_format
!= 'X' && packet_format
!= 'M')
8072 internal_error (__FILE__
, __LINE__
,
8073 _("remote_write_bytes_aux: bad packet format"));
8076 return TARGET_XFER_EOF
;
8078 payload_capacity_bytes
= get_memory_write_packet_size ();
8080 /* The packet buffer will be large enough for the payload;
8081 get_memory_packet_size ensures this. */
8084 /* Compute the size of the actual payload by subtracting out the
8085 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8087 payload_capacity_bytes
-= strlen ("$,:#NN");
8089 /* The comma won't be used. */
8090 payload_capacity_bytes
+= 1;
8091 payload_capacity_bytes
-= strlen (header
);
8092 payload_capacity_bytes
-= hexnumlen (memaddr
);
8094 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8096 strcat (rs
->buf
, header
);
8097 p
= rs
->buf
+ strlen (header
);
8099 /* Compute a best guess of the number of bytes actually transfered. */
8100 if (packet_format
== 'X')
8102 /* Best guess at number of bytes that will fit. */
8103 todo_units
= std::min (len_units
,
8104 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8106 payload_capacity_bytes
-= hexnumlen (todo_units
);
8107 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8111 /* Number of bytes that will fit. */
8113 = std::min (len_units
,
8114 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8116 payload_capacity_bytes
-= hexnumlen (todo_units
);
8117 todo_units
= std::min (todo_units
,
8118 (payload_capacity_bytes
/ unit_size
) / 2);
8121 if (todo_units
<= 0)
8122 internal_error (__FILE__
, __LINE__
,
8123 _("minimum packet size too small to write data"));
8125 /* If we already need another packet, then try to align the end
8126 of this packet to a useful boundary. */
8127 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8128 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8130 /* Append "<memaddr>". */
8131 memaddr
= remote_address_masked (memaddr
);
8132 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8139 /* Append the length and retain its location and size. It may need to be
8140 adjusted once the packet body has been created. */
8142 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8150 /* Append the packet body. */
8151 if (packet_format
== 'X')
8153 /* Binary mode. Send target system values byte by byte, in
8154 increasing byte addresses. Only escape certain critical
8156 payload_length_bytes
=
8157 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8158 &units_written
, payload_capacity_bytes
);
8160 /* If not all TODO units fit, then we'll need another packet. Make
8161 a second try to keep the end of the packet aligned. Don't do
8162 this if the packet is tiny. */
8163 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8167 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8169 if (new_todo_units
!= units_written
)
8170 payload_length_bytes
=
8171 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8172 (gdb_byte
*) p
, &units_written
,
8173 payload_capacity_bytes
);
8176 p
+= payload_length_bytes
;
8177 if (use_length
&& units_written
< todo_units
)
8179 /* Escape chars have filled up the buffer prematurely,
8180 and we have actually sent fewer units than planned.
8181 Fix-up the length field of the packet. Use the same
8182 number of characters as before. */
8183 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8185 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8190 /* Normal mode: Send target system values byte by byte, in
8191 increasing byte addresses. Each byte is encoded as a two hex
8193 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8194 units_written
= todo_units
;
8197 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8198 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8200 if (rs
->buf
[0] == 'E')
8201 return TARGET_XFER_E_IO
;
8203 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8204 send fewer units than we'd planned. */
8205 *xfered_len_units
= (ULONGEST
) units_written
;
8206 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8209 /* Write memory data directly to the remote machine.
8210 This does not inform the data cache; the data cache uses this.
8211 MEMADDR is the address in the remote memory space.
8212 MYADDR is the address of the buffer in our space.
8213 LEN is the number of bytes.
8215 Return the transferred status, error or OK (an
8216 'enum target_xfer_status' value). Save the number of bytes
8217 transferred in *XFERED_LEN. Only transfer a single packet. */
8219 static enum target_xfer_status
8220 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8221 int unit_size
, ULONGEST
*xfered_len
)
8223 const char *packet_format
= NULL
;
8225 /* Check whether the target supports binary download. */
8226 check_binary_download (memaddr
);
8228 switch (packet_support (PACKET_X
))
8231 packet_format
= "X";
8233 case PACKET_DISABLE
:
8234 packet_format
= "M";
8236 case PACKET_SUPPORT_UNKNOWN
:
8237 internal_error (__FILE__
, __LINE__
,
8238 _("remote_write_bytes: bad internal state"));
8240 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8243 return remote_write_bytes_aux (packet_format
,
8244 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8245 packet_format
[0], 1);
8248 /* Read memory data directly from the remote machine.
8249 This does not use the data cache; the data cache uses this.
8250 MEMADDR is the address in the remote memory space.
8251 MYADDR is the address of the buffer in our space.
8252 LEN_UNITS is the number of addressable memory units to read..
8253 UNIT_SIZE is the length in bytes of an addressable unit.
8255 Return the transferred status, error or OK (an
8256 'enum target_xfer_status' value). Save the number of bytes
8257 transferred in *XFERED_LEN_UNITS.
8259 See the comment of remote_write_bytes_aux for an example of
8260 memory read/write exchange between gdb and the stub. */
8262 static enum target_xfer_status
8263 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8264 int unit_size
, ULONGEST
*xfered_len_units
)
8266 struct remote_state
*rs
= get_remote_state ();
8267 int buf_size_bytes
; /* Max size of packet output buffer. */
8272 buf_size_bytes
= get_memory_read_packet_size ();
8273 /* The packet buffer will be large enough for the payload;
8274 get_memory_packet_size ensures this. */
8276 /* Number of units that will fit. */
8277 todo_units
= std::min (len_units
,
8278 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8280 /* Construct "m"<memaddr>","<len>". */
8281 memaddr
= remote_address_masked (memaddr
);
8284 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8286 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8289 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8290 if (rs
->buf
[0] == 'E'
8291 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8292 && rs
->buf
[3] == '\0')
8293 return TARGET_XFER_E_IO
;
8294 /* Reply describes memory byte by byte, each byte encoded as two hex
8297 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8298 /* Return what we have. Let higher layers handle partial reads. */
8299 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8300 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8303 /* Using the set of read-only target sections of remote, read live
8306 For interface/parameters/return description see target.h,
8309 static enum target_xfer_status
8310 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8311 ULONGEST memaddr
, ULONGEST len
,
8312 int unit_size
, ULONGEST
*xfered_len
)
8314 struct target_section
*secp
;
8315 struct target_section_table
*table
;
8317 secp
= target_section_by_addr (ops
, memaddr
);
8319 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8320 secp
->the_bfd_section
)
8323 struct target_section
*p
;
8324 ULONGEST memend
= memaddr
+ len
;
8326 table
= target_get_section_table (ops
);
8328 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8330 if (memaddr
>= p
->addr
)
8332 if (memend
<= p
->endaddr
)
8334 /* Entire transfer is within this section. */
8335 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8338 else if (memaddr
>= p
->endaddr
)
8340 /* This section ends before the transfer starts. */
8345 /* This section overlaps the transfer. Just do half. */
8346 len
= p
->endaddr
- memaddr
;
8347 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8354 return TARGET_XFER_EOF
;
8357 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8358 first if the requested memory is unavailable in traceframe.
8359 Otherwise, fall back to remote_read_bytes_1. */
8361 static enum target_xfer_status
8362 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8363 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8364 ULONGEST
*xfered_len
)
8367 return TARGET_XFER_EOF
;
8369 if (get_traceframe_number () != -1)
8371 std::vector
<mem_range
> available
;
8373 /* If we fail to get the set of available memory, then the
8374 target does not support querying traceframe info, and so we
8375 attempt reading from the traceframe anyway (assuming the
8376 target implements the old QTro packet then). */
8377 if (traceframe_available_memory (&available
, memaddr
, len
))
8379 if (available
.empty () || available
[0].start
!= memaddr
)
8381 enum target_xfer_status res
;
8383 /* Don't read into the traceframe's available
8385 if (!available
.empty ())
8387 LONGEST oldlen
= len
;
8389 len
= available
[0].start
- memaddr
;
8390 gdb_assert (len
<= oldlen
);
8393 /* This goes through the topmost target again. */
8394 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8395 len
, unit_size
, xfered_len
);
8396 if (res
== TARGET_XFER_OK
)
8397 return TARGET_XFER_OK
;
8400 /* No use trying further, we know some memory starting
8401 at MEMADDR isn't available. */
8403 return (*xfered_len
!= 0) ?
8404 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8408 /* Don't try to read more than how much is available, in
8409 case the target implements the deprecated QTro packet to
8410 cater for older GDBs (the target's knowledge of read-only
8411 sections may be outdated by now). */
8412 len
= available
[0].length
;
8416 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8421 /* Sends a packet with content determined by the printf format string
8422 FORMAT and the remaining arguments, then gets the reply. Returns
8423 whether the packet was a success, a failure, or unknown. */
8425 static enum packet_result
remote_send_printf (const char *format
, ...)
8426 ATTRIBUTE_PRINTF (1, 2);
8428 static enum packet_result
8429 remote_send_printf (const char *format
, ...)
8431 struct remote_state
*rs
= get_remote_state ();
8432 int max_size
= get_remote_packet_size ();
8435 va_start (ap
, format
);
8438 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8439 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8441 if (putpkt (rs
->buf
) < 0)
8442 error (_("Communication problem with target."));
8445 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8447 return packet_check_result (rs
->buf
);
8450 /* Flash writing can take quite some time. We'll set
8451 effectively infinite timeout for flash operations.
8452 In future, we'll need to decide on a better approach. */
8453 static const int remote_flash_timeout
= 1000;
8456 remote_flash_erase (struct target_ops
*ops
,
8457 ULONGEST address
, LONGEST length
)
8459 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8460 enum packet_result ret
;
8461 scoped_restore restore_timeout
8462 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8464 ret
= remote_send_printf ("vFlashErase:%s,%s",
8465 phex (address
, addr_size
),
8469 case PACKET_UNKNOWN
:
8470 error (_("Remote target does not support flash erase"));
8472 error (_("Error erasing flash with vFlashErase packet"));
8478 static enum target_xfer_status
8479 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8480 ULONGEST length
, ULONGEST
*xfered_len
,
8481 const gdb_byte
*data
)
8483 scoped_restore restore_timeout
8484 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8485 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8490 remote_flash_done (struct target_ops
*ops
)
8494 scoped_restore restore_timeout
8495 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8497 ret
= remote_send_printf ("vFlashDone");
8501 case PACKET_UNKNOWN
:
8502 error (_("Remote target does not support vFlashDone"));
8504 error (_("Error finishing flash operation"));
8511 remote_files_info (struct target_ops
*ignore
)
8513 puts_filtered ("Debugging a target over a serial line.\n");
8516 /* Stuff for dealing with the packets which are part of this protocol.
8517 See comment at top of file for details. */
8519 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8520 error to higher layers. Called when a serial error is detected.
8521 The exception message is STRING, followed by a colon and a blank,
8522 the system error message for errno at function entry and final dot
8523 for output compatibility with throw_perror_with_name. */
8526 unpush_and_perror (const char *string
)
8528 int saved_errno
= errno
;
8530 remote_unpush_target ();
8531 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8532 safe_strerror (saved_errno
));
8535 /* Read a single character from the remote end. The current quit
8536 handler is overridden to avoid quitting in the middle of packet
8537 sequence, as that would break communication with the remote server.
8538 See remote_serial_quit_handler for more detail. */
8541 readchar (int timeout
)
8544 struct remote_state
*rs
= get_remote_state ();
8547 scoped_restore restore_quit
8548 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8550 rs
->got_ctrlc_during_io
= 0;
8552 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8554 if (rs
->got_ctrlc_during_io
)
8561 switch ((enum serial_rc
) ch
)
8564 remote_unpush_target ();
8565 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8568 unpush_and_perror (_("Remote communication error. "
8569 "Target disconnected."));
8571 case SERIAL_TIMEOUT
:
8577 /* Wrapper for serial_write that closes the target and throws if
8578 writing fails. The current quit handler is overridden to avoid
8579 quitting in the middle of packet sequence, as that would break
8580 communication with the remote server. See
8581 remote_serial_quit_handler for more detail. */
8584 remote_serial_write (const char *str
, int len
)
8586 struct remote_state
*rs
= get_remote_state ();
8588 scoped_restore restore_quit
8589 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8591 rs
->got_ctrlc_during_io
= 0;
8593 if (serial_write (rs
->remote_desc
, str
, len
))
8595 unpush_and_perror (_("Remote communication error. "
8596 "Target disconnected."));
8599 if (rs
->got_ctrlc_during_io
)
8603 /* Send the command in *BUF to the remote machine, and read the reply
8604 into *BUF. Report an error if we get an error reply. Resize
8605 *BUF using xrealloc if necessary to hold the result, and update
8609 remote_send (char **buf
,
8613 getpkt (buf
, sizeof_buf
, 0);
8615 if ((*buf
)[0] == 'E')
8616 error (_("Remote failure reply: %s"), *buf
);
8619 /* Return a string representing an escaped version of BUF, of len N.
8620 E.g. \n is converted to \\n, \t to \\t, etc. */
8623 escape_buffer (const char *buf
, int n
)
8627 stb
.putstrn (buf
, n
, '\\');
8628 return std::move (stb
.string ());
8631 /* Display a null-terminated packet on stdout, for debugging, using C
8635 print_packet (const char *buf
)
8637 puts_filtered ("\"");
8638 fputstr_filtered (buf
, '"', gdb_stdout
);
8639 puts_filtered ("\"");
8643 putpkt (const char *buf
)
8645 return putpkt_binary (buf
, strlen (buf
));
8648 /* Send a packet to the remote machine, with error checking. The data
8649 of the packet is in BUF. The string in BUF can be at most
8650 get_remote_packet_size () - 5 to account for the $, # and checksum,
8651 and for a possible /0 if we are debugging (remote_debug) and want
8652 to print the sent packet as a string. */
8655 putpkt_binary (const char *buf
, int cnt
)
8657 struct remote_state
*rs
= get_remote_state ();
8659 unsigned char csum
= 0;
8660 gdb::def_vector
<char> data (cnt
+ 6);
8661 char *buf2
= data
.data ();
8667 /* Catch cases like trying to read memory or listing threads while
8668 we're waiting for a stop reply. The remote server wouldn't be
8669 ready to handle this request, so we'd hang and timeout. We don't
8670 have to worry about this in synchronous mode, because in that
8671 case it's not possible to issue a command while the target is
8672 running. This is not a problem in non-stop mode, because in that
8673 case, the stub is always ready to process serial input. */
8674 if (!target_is_non_stop_p ()
8675 && target_is_async_p ()
8676 && rs
->waiting_for_stop_reply
)
8678 error (_("Cannot execute this command while the target is running.\n"
8679 "Use the \"interrupt\" command to stop the target\n"
8680 "and then try again."));
8683 /* We're sending out a new packet. Make sure we don't look at a
8684 stale cached response. */
8685 rs
->cached_wait_status
= 0;
8687 /* Copy the packet into buffer BUF2, encapsulating it
8688 and giving it a checksum. */
8693 for (i
= 0; i
< cnt
; i
++)
8699 *p
++ = tohex ((csum
>> 4) & 0xf);
8700 *p
++ = tohex (csum
& 0xf);
8702 /* Send it over and over until we get a positive ack. */
8706 int started_error_output
= 0;
8712 int len
= (int) (p
- buf2
);
8715 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8717 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8719 if (len
> REMOTE_DEBUG_MAX_CHAR
)
8720 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
8721 len
- REMOTE_DEBUG_MAX_CHAR
);
8723 fprintf_unfiltered (gdb_stdlog
, "...");
8725 gdb_flush (gdb_stdlog
);
8727 remote_serial_write (buf2
, p
- buf2
);
8729 /* If this is a no acks version of the remote protocol, send the
8730 packet and move on. */
8734 /* Read until either a timeout occurs (-2) or '+' is read.
8735 Handle any notification that arrives in the mean time. */
8738 ch
= readchar (remote_timeout
);
8746 case SERIAL_TIMEOUT
:
8749 if (started_error_output
)
8751 putchar_unfiltered ('\n');
8752 started_error_output
= 0;
8761 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8765 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8767 case SERIAL_TIMEOUT
:
8771 break; /* Retransmit buffer. */
8775 fprintf_unfiltered (gdb_stdlog
,
8776 "Packet instead of Ack, ignoring it\n");
8777 /* It's probably an old response sent because an ACK
8778 was lost. Gobble up the packet and ack it so it
8779 doesn't get retransmitted when we resend this
8782 remote_serial_write ("+", 1);
8783 continue; /* Now, go look for +. */
8790 /* If we got a notification, handle it, and go back to looking
8792 /* We've found the start of a notification. Now
8793 collect the data. */
8794 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8799 std::string str
= escape_buffer (rs
->buf
, val
);
8801 fprintf_unfiltered (gdb_stdlog
,
8802 " Notification received: %s\n",
8805 handle_notification (rs
->notif_state
, rs
->buf
);
8806 /* We're in sync now, rewait for the ack. */
8813 if (!started_error_output
)
8815 started_error_output
= 1;
8816 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8818 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8819 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8828 if (!started_error_output
)
8830 started_error_output
= 1;
8831 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8833 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8837 break; /* Here to retransmit. */
8841 /* This is wrong. If doing a long backtrace, the user should be
8842 able to get out next time we call QUIT, without anything as
8843 violent as interrupt_query. If we want to provide a way out of
8844 here without getting to the next QUIT, it should be based on
8845 hitting ^C twice as in remote_wait. */
8857 /* Come here after finding the start of a frame when we expected an
8858 ack. Do our best to discard the rest of this packet. */
8867 c
= readchar (remote_timeout
);
8870 case SERIAL_TIMEOUT
:
8871 /* Nothing we can do. */
8874 /* Discard the two bytes of checksum and stop. */
8875 c
= readchar (remote_timeout
);
8877 c
= readchar (remote_timeout
);
8880 case '*': /* Run length encoding. */
8881 /* Discard the repeat count. */
8882 c
= readchar (remote_timeout
);
8887 /* A regular character. */
8893 /* Come here after finding the start of the frame. Collect the rest
8894 into *BUF, verifying the checksum, length, and handling run-length
8895 compression. NUL terminate the buffer. If there is not enough room,
8896 expand *BUF using xrealloc.
8898 Returns -1 on error, number of characters in buffer (ignoring the
8899 trailing NULL) on success. (could be extended to return one of the
8900 SERIAL status indications). */
8903 read_frame (char **buf_p
,
8910 struct remote_state
*rs
= get_remote_state ();
8917 c
= readchar (remote_timeout
);
8920 case SERIAL_TIMEOUT
:
8922 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8926 fputs_filtered ("Saw new packet start in middle of old one\n",
8928 return -1; /* Start a new packet, count retries. */
8931 unsigned char pktcsum
;
8937 check_0
= readchar (remote_timeout
);
8939 check_1
= readchar (remote_timeout
);
8941 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8944 fputs_filtered ("Timeout in checksum, retrying\n",
8948 else if (check_0
< 0 || check_1
< 0)
8951 fputs_filtered ("Communication error in checksum\n",
8956 /* Don't recompute the checksum; with no ack packets we
8957 don't have any way to indicate a packet retransmission
8962 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
8963 if (csum
== pktcsum
)
8968 std::string str
= escape_buffer (buf
, bc
);
8970 fprintf_unfiltered (gdb_stdlog
,
8971 "Bad checksum, sentsum=0x%x, "
8972 "csum=0x%x, buf=%s\n",
8973 pktcsum
, csum
, str
.c_str ());
8975 /* Number of characters in buffer ignoring trailing
8979 case '*': /* Run length encoding. */
8984 c
= readchar (remote_timeout
);
8986 repeat
= c
- ' ' + 3; /* Compute repeat count. */
8988 /* The character before ``*'' is repeated. */
8990 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
8992 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
8994 /* Make some more room in the buffer. */
8995 *sizeof_buf
+= repeat
;
8996 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9000 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9006 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9010 if (bc
>= *sizeof_buf
- 1)
9012 /* Make some more room in the buffer. */
9014 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9025 /* Read a packet from the remote machine, with error checking, and
9026 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9027 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9028 rather than timing out; this is used (in synchronous mode) to wait
9029 for a target that is is executing user code to stop. */
9030 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9031 don't have to change all the calls to getpkt to deal with the
9032 return value, because at the moment I don't know what the right
9033 thing to do it for those. */
9039 getpkt_sane (buf
, sizeof_buf
, forever
);
9043 /* Read a packet from the remote machine, with error checking, and
9044 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9045 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9046 rather than timing out; this is used (in synchronous mode) to wait
9047 for a target that is is executing user code to stop. If FOREVER ==
9048 0, this function is allowed to time out gracefully and return an
9049 indication of this to the caller. Otherwise return the number of
9050 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9051 enough reason to return to the caller. *IS_NOTIF is an output
9052 boolean that indicates whether *BUF holds a notification or not
9053 (a regular packet). */
9056 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9057 int expecting_notif
, int *is_notif
)
9059 struct remote_state
*rs
= get_remote_state ();
9065 /* We're reading a new response. Make sure we don't look at a
9066 previously cached response. */
9067 rs
->cached_wait_status
= 0;
9069 strcpy (*buf
, "timeout");
9072 timeout
= watchdog
> 0 ? watchdog
: -1;
9073 else if (expecting_notif
)
9074 timeout
= 0; /* There should already be a char in the buffer. If
9077 timeout
= remote_timeout
;
9081 /* Process any number of notifications, and then return when
9085 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9087 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9089 /* This can loop forever if the remote side sends us
9090 characters continuously, but if it pauses, we'll get
9091 SERIAL_TIMEOUT from readchar because of timeout. Then
9092 we'll count that as a retry.
9094 Note that even when forever is set, we will only wait
9095 forever prior to the start of a packet. After that, we
9096 expect characters to arrive at a brisk pace. They should
9097 show up within remote_timeout intervals. */
9099 c
= readchar (timeout
);
9100 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9102 if (c
== SERIAL_TIMEOUT
)
9104 if (expecting_notif
)
9105 return -1; /* Don't complain, it's normal to not get
9106 anything in this case. */
9108 if (forever
) /* Watchdog went off? Kill the target. */
9110 remote_unpush_target ();
9111 throw_error (TARGET_CLOSE_ERROR
,
9112 _("Watchdog timeout has expired. "
9113 "Target detached."));
9116 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9120 /* We've found the start of a packet or notification.
9121 Now collect the data. */
9122 val
= read_frame (buf
, sizeof_buf
);
9127 remote_serial_write ("-", 1);
9130 if (tries
> MAX_TRIES
)
9132 /* We have tried hard enough, and just can't receive the
9133 packet/notification. Give up. */
9134 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9136 /* Skip the ack char if we're in no-ack mode. */
9137 if (!rs
->noack_mode
)
9138 remote_serial_write ("+", 1);
9142 /* If we got an ordinary packet, return that to our caller. */
9148 = escape_buffer (*buf
,
9149 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9151 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9154 if (val
> REMOTE_DEBUG_MAX_CHAR
)
9155 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9156 val
- REMOTE_DEBUG_MAX_CHAR
);
9158 fprintf_unfiltered (gdb_stdlog
, "\n");
9161 /* Skip the ack char if we're in no-ack mode. */
9162 if (!rs
->noack_mode
)
9163 remote_serial_write ("+", 1);
9164 if (is_notif
!= NULL
)
9169 /* If we got a notification, handle it, and go back to looking
9173 gdb_assert (c
== '%');
9177 std::string str
= escape_buffer (*buf
, val
);
9179 fprintf_unfiltered (gdb_stdlog
,
9180 " Notification received: %s\n",
9183 if (is_notif
!= NULL
)
9186 handle_notification (rs
->notif_state
, *buf
);
9188 /* Notifications require no acknowledgement. */
9190 if (expecting_notif
)
9197 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9199 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9203 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9206 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9210 /* Check whether EVENT is a fork event for the process specified
9211 by the pid passed in DATA, and if it is, kill the fork child. */
9214 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9215 QUEUE_ITER (stop_reply_p
) *iter
,
9219 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9220 int parent_pid
= *(int *) param
->input
;
9222 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9224 struct remote_state
*rs
= get_remote_state ();
9225 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9228 res
= remote_vkill (child_pid
, rs
);
9230 error (_("Can't kill fork child process %d"), child_pid
);
9236 /* Kill any new fork children of process PID that haven't been
9237 processed by follow_fork. */
9240 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9242 struct thread_info
*thread
;
9243 struct notif_client
*notif
= ¬if_client_stop
;
9244 struct queue_iter_param param
;
9246 /* Kill the fork child threads of any threads in process PID
9247 that are stopped at a fork event. */
9248 ALL_NON_EXITED_THREADS (thread
)
9250 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9252 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9254 struct remote_state
*rs
= get_remote_state ();
9255 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9258 res
= remote_vkill (child_pid
, rs
);
9260 error (_("Can't kill fork child process %d"), child_pid
);
9264 /* Check for any pending fork events (not reported or processed yet)
9265 in process PID and kill those fork child threads as well. */
9266 remote_notif_get_pending_events (notif
);
9268 param
.output
= NULL
;
9269 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9270 kill_child_of_pending_fork
, ¶m
);
9274 /* Target hook to kill the current inferior. */
9277 remote_kill (struct target_ops
*ops
)
9280 int pid
= ptid_get_pid (inferior_ptid
);
9281 struct remote_state
*rs
= get_remote_state ();
9283 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9285 /* If we're stopped while forking and we haven't followed yet,
9286 kill the child task. We need to do this before killing the
9287 parent task because if this is a vfork then the parent will
9289 kill_new_fork_children (pid
, rs
);
9291 res
= remote_vkill (pid
, rs
);
9294 target_mourn_inferior (inferior_ptid
);
9299 /* If we are in 'target remote' mode and we are killing the only
9300 inferior, then we will tell gdbserver to exit and unpush the
9302 if (res
== -1 && !remote_multi_process_p (rs
)
9303 && number_of_live_inferiors () == 1)
9307 /* We've killed the remote end, we get to mourn it. If we are
9308 not in extended mode, mourning the inferior also unpushes
9309 remote_ops from the target stack, which closes the remote
9311 target_mourn_inferior (inferior_ptid
);
9316 error (_("Can't kill process"));
9319 /* Send a kill request to the target using the 'vKill' packet. */
9322 remote_vkill (int pid
, struct remote_state
*rs
)
9324 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9327 /* Tell the remote target to detach. */
9328 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9330 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9332 switch (packet_ok (rs
->buf
,
9333 &remote_protocol_packets
[PACKET_vKill
]))
9339 case PACKET_UNKNOWN
:
9342 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9346 /* Send a kill request to the target using the 'k' packet. */
9349 remote_kill_k (void)
9351 /* Catch errors so the user can quit from gdb even when we
9352 aren't on speaking terms with the remote system. */
9357 CATCH (ex
, RETURN_MASK_ERROR
)
9359 if (ex
.error
== TARGET_CLOSE_ERROR
)
9361 /* If we got an (EOF) error that caused the target
9362 to go away, then we're done, that's what we wanted.
9363 "k" is susceptible to cause a premature EOF, given
9364 that the remote server isn't actually required to
9365 reply to "k", and it can happen that it doesn't
9366 even get to reply ACK to the "k". */
9370 /* Otherwise, something went wrong. We didn't actually kill
9371 the target. Just propagate the exception, and let the
9372 user or higher layers decide what to do. */
9373 throw_exception (ex
);
9379 remote_mourn (struct target_ops
*target
)
9381 struct remote_state
*rs
= get_remote_state ();
9383 /* In 'target remote' mode with one inferior, we close the connection. */
9384 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9386 unpush_target (target
);
9388 /* remote_close takes care of doing most of the clean up. */
9389 generic_mourn_inferior ();
9393 /* In case we got here due to an error, but we're going to stay
9395 rs
->waiting_for_stop_reply
= 0;
9397 /* If the current general thread belonged to the process we just
9398 detached from or has exited, the remote side current general
9399 thread becomes undefined. Considering a case like this:
9401 - We just got here due to a detach.
9402 - The process that we're detaching from happens to immediately
9403 report a global breakpoint being hit in non-stop mode, in the
9404 same thread we had selected before.
9405 - GDB attaches to this process again.
9406 - This event happens to be the next event we handle.
9408 GDB would consider that the current general thread didn't need to
9409 be set on the stub side (with Hg), since for all it knew,
9410 GENERAL_THREAD hadn't changed.
9412 Notice that although in all-stop mode, the remote server always
9413 sets the current thread to the thread reporting the stop event,
9414 that doesn't happen in non-stop mode; in non-stop, the stub *must
9415 not* change the current thread when reporting a breakpoint hit,
9416 due to the decoupling of event reporting and event handling.
9418 To keep things simple, we always invalidate our notion of the
9420 record_currthread (rs
, minus_one_ptid
);
9422 /* Call common code to mark the inferior as not running. */
9423 generic_mourn_inferior ();
9425 if (!have_inferiors ())
9427 if (!remote_multi_process_p (rs
))
9429 /* Check whether the target is running now - some remote stubs
9430 automatically restart after kill. */
9432 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9434 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9436 /* Assume that the target has been restarted. Set
9437 inferior_ptid so that bits of core GDB realizes
9438 there's something here, e.g., so that the user can
9439 say "kill" again. */
9440 inferior_ptid
= magic_null_ptid
;
9447 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9449 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9453 extended_remote_disable_randomization (int val
)
9455 struct remote_state
*rs
= get_remote_state ();
9458 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9461 reply
= remote_get_noisy_reply ();
9463 error (_("Target does not support QDisableRandomization."));
9464 if (strcmp (reply
, "OK") != 0)
9465 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9469 extended_remote_run (const std::string
&args
)
9471 struct remote_state
*rs
= get_remote_state ();
9473 const char *remote_exec_file
= get_remote_exec_file ();
9475 /* If the user has disabled vRun support, or we have detected that
9476 support is not available, do not try it. */
9477 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9480 strcpy (rs
->buf
, "vRun;");
9481 len
= strlen (rs
->buf
);
9483 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9484 error (_("Remote file name too long for run packet"));
9485 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9486 strlen (remote_exec_file
));
9492 gdb_argv
argv (args
.c_str ());
9493 for (i
= 0; argv
[i
] != NULL
; i
++)
9495 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9496 error (_("Argument list too long for run packet"));
9497 rs
->buf
[len
++] = ';';
9498 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9503 rs
->buf
[len
++] = '\0';
9506 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9508 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9511 /* We have a wait response. All is well. */
9513 case PACKET_UNKNOWN
:
9516 if (remote_exec_file
[0] == '\0')
9517 error (_("Running the default executable on the remote target failed; "
9518 "try \"set remote exec-file\"?"));
9520 error (_("Running \"%s\" on the remote target failed"),
9523 gdb_assert_not_reached (_("bad switch"));
9527 /* Helper function to send set/unset environment packets. ACTION is
9528 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9529 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9533 send_environment_packet (struct remote_state
*rs
,
9538 /* Convert the environment variable to an hex string, which
9539 is the best format to be transmitted over the wire. */
9540 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9543 xsnprintf (rs
->buf
, get_remote_packet_size (),
9544 "%s:%s", packet
, encoded_value
.c_str ());
9547 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9548 if (strcmp (rs
->buf
, "OK") != 0)
9549 warning (_("Unable to %s environment variable '%s' on remote."),
9553 /* Helper function to handle the QEnvironment* packets. */
9556 extended_remote_environment_support (struct remote_state
*rs
)
9558 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9560 putpkt ("QEnvironmentReset");
9561 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9562 if (strcmp (rs
->buf
, "OK") != 0)
9563 warning (_("Unable to reset environment on remote."));
9566 gdb_environ
*e
= ¤t_inferior ()->environment
;
9568 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9569 for (const std::string
&el
: e
->user_set_env ())
9570 send_environment_packet (rs
, "set", "QEnvironmentHexEncoded",
9573 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9574 for (const std::string
&el
: e
->user_unset_env ())
9575 send_environment_packet (rs
, "unset", "QEnvironmentUnset", el
.c_str ());
9578 /* Helper function to set the current working directory for the
9579 inferior in the remote target. */
9582 extended_remote_set_inferior_cwd (struct remote_state
*rs
)
9584 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
9586 const char *inferior_cwd
= get_inferior_cwd ();
9588 if (inferior_cwd
!= NULL
)
9590 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
9591 strlen (inferior_cwd
));
9593 xsnprintf (rs
->buf
, get_remote_packet_size (),
9594 "QSetWorkingDir:%s", hexpath
.c_str ());
9598 /* An empty inferior_cwd means that the user wants us to
9599 reset the remote server's inferior's cwd. */
9600 xsnprintf (rs
->buf
, get_remote_packet_size (),
9605 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9606 if (packet_ok (rs
->buf
,
9607 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
9610 Remote replied unexpectedly while setting the inferior's working\n\
9617 /* In the extended protocol we want to be able to do things like
9618 "run" and have them basically work as expected. So we need
9619 a special create_inferior function. We support changing the
9620 executable file and the command line arguments, but not the
9624 extended_remote_create_inferior (struct target_ops
*ops
,
9625 const char *exec_file
,
9626 const std::string
&args
,
9627 char **env
, int from_tty
)
9631 struct remote_state
*rs
= get_remote_state ();
9632 const char *remote_exec_file
= get_remote_exec_file ();
9634 /* If running asynchronously, register the target file descriptor
9635 with the event loop. */
9636 if (target_can_async_p ())
9639 /* Disable address space randomization if requested (and supported). */
9640 if (extended_remote_supports_disable_randomization (ops
))
9641 extended_remote_disable_randomization (disable_randomization
);
9643 /* If startup-with-shell is on, we inform gdbserver to start the
9644 remote inferior using a shell. */
9645 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
9647 xsnprintf (rs
->buf
, get_remote_packet_size (),
9648 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
9650 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9651 if (strcmp (rs
->buf
, "OK") != 0)
9653 Remote replied unexpectedly while setting startup-with-shell: %s"),
9657 extended_remote_environment_support (rs
);
9659 extended_remote_set_inferior_cwd (rs
);
9661 /* Now restart the remote server. */
9662 run_worked
= extended_remote_run (args
) != -1;
9665 /* vRun was not supported. Fail if we need it to do what the
9667 if (remote_exec_file
[0])
9668 error (_("Remote target does not support \"set remote exec-file\""));
9670 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9672 /* Fall back to "R". */
9673 extended_remote_restart ();
9676 if (!have_inferiors ())
9678 /* Clean up from the last time we ran, before we mark the target
9679 running again. This will mark breakpoints uninserted, and
9680 get_offsets may insert breakpoints. */
9681 init_thread_list ();
9682 init_wait_for_inferior ();
9685 /* vRun's success return is a stop reply. */
9686 stop_reply
= run_worked
? rs
->buf
: NULL
;
9687 add_current_inferior_and_thread (stop_reply
);
9689 /* Get updated offsets, if the stub uses qOffsets. */
9694 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9695 the list of conditions (in agent expression bytecode format), if any, the
9696 target needs to evaluate. The output is placed into the packet buffer
9697 started from BUF and ended at BUF_END. */
9700 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9701 struct bp_target_info
*bp_tgt
, char *buf
,
9704 if (bp_tgt
->conditions
.empty ())
9707 buf
+= strlen (buf
);
9708 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9711 /* Send conditions to the target. */
9712 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
9714 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9715 buf
+= strlen (buf
);
9716 for (int i
= 0; i
< aexpr
->len
; ++i
)
9717 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9724 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9725 struct bp_target_info
*bp_tgt
, char *buf
)
9727 if (bp_tgt
->tcommands
.empty ())
9730 buf
+= strlen (buf
);
9732 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9733 buf
+= strlen (buf
);
9735 /* Concatenate all the agent expressions that are commands into the
9737 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
9739 sprintf (buf
, "X%x,", aexpr
->len
);
9740 buf
+= strlen (buf
);
9741 for (int i
= 0; i
< aexpr
->len
; ++i
)
9742 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9747 /* Insert a breakpoint. On targets that have software breakpoint
9748 support, we ask the remote target to do the work; on targets
9749 which don't, we insert a traditional memory breakpoint. */
9752 remote_insert_breakpoint (struct target_ops
*ops
,
9753 struct gdbarch
*gdbarch
,
9754 struct bp_target_info
*bp_tgt
)
9756 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9757 If it succeeds, then set the support to PACKET_ENABLE. If it
9758 fails, and the user has explicitly requested the Z support then
9759 report an error, otherwise, mark it disabled and go on. */
9761 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9763 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9764 struct remote_state
*rs
;
9767 /* Make sure the remote is pointing at the right process, if
9769 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9770 set_general_process ();
9772 rs
= get_remote_state ();
9774 endbuf
= rs
->buf
+ get_remote_packet_size ();
9779 addr
= (ULONGEST
) remote_address_masked (addr
);
9780 p
+= hexnumstr (p
, addr
);
9781 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9783 if (remote_supports_cond_breakpoints (ops
))
9784 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9786 if (remote_can_run_breakpoint_commands (ops
))
9787 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9790 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9792 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9798 case PACKET_UNKNOWN
:
9803 /* If this breakpoint has target-side commands but this stub doesn't
9804 support Z0 packets, throw error. */
9805 if (!bp_tgt
->tcommands
.empty ())
9806 throw_error (NOT_SUPPORTED_ERROR
, _("\
9807 Target doesn't support breakpoints that have target side commands."));
9809 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9813 remote_remove_breakpoint (struct target_ops
*ops
,
9814 struct gdbarch
*gdbarch
,
9815 struct bp_target_info
*bp_tgt
,
9816 enum remove_bp_reason reason
)
9818 CORE_ADDR addr
= bp_tgt
->placed_address
;
9819 struct remote_state
*rs
= get_remote_state ();
9821 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9824 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9826 /* Make sure the remote is pointing at the right process, if
9828 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9829 set_general_process ();
9835 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9836 p
+= hexnumstr (p
, addr
);
9837 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9840 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9842 return (rs
->buf
[0] == 'E');
9845 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9848 static enum Z_packet_type
9849 watchpoint_to_Z_packet (int type
)
9854 return Z_PACKET_WRITE_WP
;
9857 return Z_PACKET_READ_WP
;
9860 return Z_PACKET_ACCESS_WP
;
9863 internal_error (__FILE__
, __LINE__
,
9864 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9869 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9870 enum target_hw_bp_type type
, struct expression
*cond
)
9872 struct remote_state
*rs
= get_remote_state ();
9873 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9875 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9877 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9880 /* Make sure the remote is pointing at the right process, if
9882 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9883 set_general_process ();
9885 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9886 p
= strchr (rs
->buf
, '\0');
9887 addr
= remote_address_masked (addr
);
9888 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9889 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9892 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9894 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9898 case PACKET_UNKNOWN
:
9903 internal_error (__FILE__
, __LINE__
,
9904 _("remote_insert_watchpoint: reached end of function"));
9908 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9909 CORE_ADDR start
, int length
)
9911 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9913 return diff
< length
;
9918 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9919 enum target_hw_bp_type type
, struct expression
*cond
)
9921 struct remote_state
*rs
= get_remote_state ();
9922 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9924 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9926 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9929 /* Make sure the remote is pointing at the right process, if
9931 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9932 set_general_process ();
9934 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9935 p
= strchr (rs
->buf
, '\0');
9936 addr
= remote_address_masked (addr
);
9937 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9938 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9940 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9942 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9945 case PACKET_UNKNOWN
:
9950 internal_error (__FILE__
, __LINE__
,
9951 _("remote_remove_watchpoint: reached end of function"));
9955 int remote_hw_watchpoint_limit
= -1;
9956 int remote_hw_watchpoint_length_limit
= -1;
9957 int remote_hw_breakpoint_limit
= -1;
9960 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9961 CORE_ADDR addr
, int len
)
9963 if (remote_hw_watchpoint_length_limit
== 0)
9965 else if (remote_hw_watchpoint_length_limit
< 0)
9967 else if (len
<= remote_hw_watchpoint_length_limit
)
9974 remote_check_watch_resources (struct target_ops
*self
,
9975 enum bptype type
, int cnt
, int ot
)
9977 if (type
== bp_hardware_breakpoint
)
9979 if (remote_hw_breakpoint_limit
== 0)
9981 else if (remote_hw_breakpoint_limit
< 0)
9983 else if (cnt
<= remote_hw_breakpoint_limit
)
9988 if (remote_hw_watchpoint_limit
== 0)
9990 else if (remote_hw_watchpoint_limit
< 0)
9994 else if (cnt
<= remote_hw_watchpoint_limit
)
10000 /* The to_stopped_by_sw_breakpoint method of target remote. */
10003 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10005 struct thread_info
*thread
= inferior_thread ();
10007 return (thread
->priv
!= NULL
10008 && (get_remote_thread_info (thread
)->stop_reason
10009 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10012 /* The to_supports_stopped_by_sw_breakpoint method of target
10016 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10018 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10021 /* The to_stopped_by_hw_breakpoint method of target remote. */
10024 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10026 struct thread_info
*thread
= inferior_thread ();
10028 return (thread
->priv
!= NULL
10029 && (get_remote_thread_info (thread
)->stop_reason
10030 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10033 /* The to_supports_stopped_by_hw_breakpoint method of target
10037 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10039 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10043 remote_stopped_by_watchpoint (struct target_ops
*ops
)
10045 struct thread_info
*thread
= inferior_thread ();
10047 return (thread
->priv
!= NULL
10048 && (get_remote_thread_info (thread
)->stop_reason
10049 == TARGET_STOPPED_BY_WATCHPOINT
));
10053 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10055 struct thread_info
*thread
= inferior_thread ();
10057 if (thread
->priv
!= NULL
10058 && (get_remote_thread_info (thread
)->stop_reason
10059 == TARGET_STOPPED_BY_WATCHPOINT
))
10061 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10070 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10071 struct bp_target_info
*bp_tgt
)
10073 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10074 struct remote_state
*rs
;
10078 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10081 /* Make sure the remote is pointing at the right process, if
10083 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10084 set_general_process ();
10086 rs
= get_remote_state ();
10088 endbuf
= rs
->buf
+ get_remote_packet_size ();
10094 addr
= remote_address_masked (addr
);
10095 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10096 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10098 if (remote_supports_cond_breakpoints (self
))
10099 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10101 if (remote_can_run_breakpoint_commands (self
))
10102 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10105 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10107 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10110 if (rs
->buf
[1] == '.')
10112 message
= strchr (rs
->buf
+ 2, '.');
10114 error (_("Remote failure reply: %s"), message
+ 1);
10117 case PACKET_UNKNOWN
:
10122 internal_error (__FILE__
, __LINE__
,
10123 _("remote_insert_hw_breakpoint: reached end of function"));
10128 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10129 struct bp_target_info
*bp_tgt
)
10132 struct remote_state
*rs
= get_remote_state ();
10134 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10136 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10139 /* Make sure the remote is pointing at the right process, if
10141 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10142 set_general_process ();
10148 addr
= remote_address_masked (bp_tgt
->placed_address
);
10149 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10150 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10153 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10155 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10158 case PACKET_UNKNOWN
:
10163 internal_error (__FILE__
, __LINE__
,
10164 _("remote_remove_hw_breakpoint: reached end of function"));
10167 /* Verify memory using the "qCRC:" request. */
10170 remote_verify_memory (struct target_ops
*ops
,
10171 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10173 struct remote_state
*rs
= get_remote_state ();
10174 unsigned long host_crc
, target_crc
;
10177 /* It doesn't make sense to use qCRC if the remote target is
10178 connected but not running. */
10179 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10181 enum packet_result result
;
10183 /* Make sure the remote is pointing at the right process. */
10184 set_general_process ();
10186 /* FIXME: assumes lma can fit into long. */
10187 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10188 (long) lma
, (long) size
);
10191 /* Be clever; compute the host_crc before waiting for target
10193 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10195 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10197 result
= packet_ok (rs
->buf
,
10198 &remote_protocol_packets
[PACKET_qCRC
]);
10199 if (result
== PACKET_ERROR
)
10201 else if (result
== PACKET_OK
)
10203 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10204 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10206 return (host_crc
== target_crc
);
10210 return simple_verify_memory (ops
, data
, lma
, size
);
10213 /* compare-sections command
10215 With no arguments, compares each loadable section in the exec bfd
10216 with the same memory range on the target, and reports mismatches.
10217 Useful for verifying the image on the target against the exec file. */
10220 compare_sections_command (const char *args
, int from_tty
)
10223 const char *sectname
;
10224 bfd_size_type size
;
10227 int mismatched
= 0;
10232 error (_("command cannot be used without an exec file"));
10234 /* Make sure the remote is pointing at the right process. */
10235 set_general_process ();
10237 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10243 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10245 if (!(s
->flags
& SEC_LOAD
))
10246 continue; /* Skip non-loadable section. */
10248 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10249 continue; /* Skip writeable sections */
10251 size
= bfd_get_section_size (s
);
10253 continue; /* Skip zero-length section. */
10255 sectname
= bfd_get_section_name (exec_bfd
, s
);
10256 if (args
&& strcmp (args
, sectname
) != 0)
10257 continue; /* Not the section selected by user. */
10259 matched
= 1; /* Do this section. */
10262 gdb::byte_vector
sectdata (size
);
10263 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10265 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10268 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10269 paddress (target_gdbarch (), lma
),
10270 paddress (target_gdbarch (), lma
+ size
));
10272 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10273 paddress (target_gdbarch (), lma
),
10274 paddress (target_gdbarch (), lma
+ size
));
10276 printf_filtered ("matched.\n");
10279 printf_filtered ("MIS-MATCHED!\n");
10283 if (mismatched
> 0)
10284 warning (_("One or more sections of the target image does not match\n\
10285 the loaded file\n"));
10286 if (args
&& !matched
)
10287 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10290 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10291 into remote target. The number of bytes written to the remote
10292 target is returned, or -1 for error. */
10294 static enum target_xfer_status
10295 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10296 const char *annex
, const gdb_byte
*writebuf
,
10297 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10298 struct packet_config
*packet
)
10302 struct remote_state
*rs
= get_remote_state ();
10303 int max_size
= get_memory_write_packet_size ();
10305 if (packet_config_support (packet
) == PACKET_DISABLE
)
10306 return TARGET_XFER_E_IO
;
10308 /* Insert header. */
10309 i
= snprintf (rs
->buf
, max_size
,
10310 "qXfer:%s:write:%s:%s:",
10311 object_name
, annex
? annex
: "",
10312 phex_nz (offset
, sizeof offset
));
10313 max_size
-= (i
+ 1);
10315 /* Escape as much data as fits into rs->buf. */
10316 buf_len
= remote_escape_output
10317 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10319 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10320 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10321 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10322 return TARGET_XFER_E_IO
;
10324 unpack_varlen_hex (rs
->buf
, &n
);
10327 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10330 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10331 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10332 number of bytes read is returned, or 0 for EOF, or -1 for error.
10333 The number of bytes read may be less than LEN without indicating an
10334 EOF. PACKET is checked and updated to indicate whether the remote
10335 target supports this object. */
10337 static enum target_xfer_status
10338 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10340 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10341 ULONGEST
*xfered_len
,
10342 struct packet_config
*packet
)
10344 struct remote_state
*rs
= get_remote_state ();
10345 LONGEST i
, n
, packet_len
;
10347 if (packet_config_support (packet
) == PACKET_DISABLE
)
10348 return TARGET_XFER_E_IO
;
10350 /* Check whether we've cached an end-of-object packet that matches
10352 if (rs
->finished_object
)
10354 if (strcmp (object_name
, rs
->finished_object
) == 0
10355 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10356 && offset
== rs
->finished_offset
)
10357 return TARGET_XFER_EOF
;
10360 /* Otherwise, we're now reading something different. Discard
10362 xfree (rs
->finished_object
);
10363 xfree (rs
->finished_annex
);
10364 rs
->finished_object
= NULL
;
10365 rs
->finished_annex
= NULL
;
10368 /* Request only enough to fit in a single packet. The actual data
10369 may not, since we don't know how much of it will need to be escaped;
10370 the target is free to respond with slightly less data. We subtract
10371 five to account for the response type and the protocol frame. */
10372 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10373 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10374 object_name
, annex
? annex
: "",
10375 phex_nz (offset
, sizeof offset
),
10376 phex_nz (n
, sizeof n
));
10377 i
= putpkt (rs
->buf
);
10379 return TARGET_XFER_E_IO
;
10382 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10383 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10384 return TARGET_XFER_E_IO
;
10386 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10387 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10389 /* 'm' means there is (or at least might be) more data after this
10390 batch. That does not make sense unless there's at least one byte
10391 of data in this reply. */
10392 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10393 error (_("Remote qXfer reply contained no data."));
10395 /* Got some data. */
10396 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10397 packet_len
- 1, readbuf
, n
);
10399 /* 'l' is an EOF marker, possibly including a final block of data,
10400 or possibly empty. If we have the final block of a non-empty
10401 object, record this fact to bypass a subsequent partial read. */
10402 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10404 rs
->finished_object
= xstrdup (object_name
);
10405 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10406 rs
->finished_offset
= offset
+ i
;
10410 return TARGET_XFER_EOF
;
10414 return TARGET_XFER_OK
;
10418 static enum target_xfer_status
10419 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10420 const char *annex
, gdb_byte
*readbuf
,
10421 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10422 ULONGEST
*xfered_len
)
10424 struct remote_state
*rs
;
10428 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10430 set_remote_traceframe ();
10431 set_general_thread (inferior_ptid
);
10433 rs
= get_remote_state ();
10435 /* Handle memory using the standard memory routines. */
10436 if (object
== TARGET_OBJECT_MEMORY
)
10438 /* If the remote target is connected but not running, we should
10439 pass this request down to a lower stratum (e.g. the executable
10441 if (!target_has_execution
)
10442 return TARGET_XFER_EOF
;
10444 if (writebuf
!= NULL
)
10445 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10448 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10452 /* Handle SPU memory using qxfer packets. */
10453 if (object
== TARGET_OBJECT_SPU
)
10456 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10457 xfered_len
, &remote_protocol_packets
10458 [PACKET_qXfer_spu_read
]);
10460 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10461 xfered_len
, &remote_protocol_packets
10462 [PACKET_qXfer_spu_write
]);
10465 /* Handle extra signal info using qxfer packets. */
10466 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10469 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10470 xfered_len
, &remote_protocol_packets
10471 [PACKET_qXfer_siginfo_read
]);
10473 return remote_write_qxfer (ops
, "siginfo", annex
,
10474 writebuf
, offset
, len
, xfered_len
,
10475 &remote_protocol_packets
10476 [PACKET_qXfer_siginfo_write
]);
10479 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10482 return remote_read_qxfer (ops
, "statictrace", annex
,
10483 readbuf
, offset
, len
, xfered_len
,
10484 &remote_protocol_packets
10485 [PACKET_qXfer_statictrace_read
]);
10487 return TARGET_XFER_E_IO
;
10490 /* Only handle flash writes. */
10491 if (writebuf
!= NULL
)
10495 case TARGET_OBJECT_FLASH
:
10496 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10500 return TARGET_XFER_E_IO
;
10504 /* Map pre-existing objects onto letters. DO NOT do this for new
10505 objects!!! Instead specify new query packets. */
10508 case TARGET_OBJECT_AVR
:
10512 case TARGET_OBJECT_AUXV
:
10513 gdb_assert (annex
== NULL
);
10514 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10516 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10518 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10519 return remote_read_qxfer
10520 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10521 &remote_protocol_packets
[PACKET_qXfer_features
]);
10523 case TARGET_OBJECT_LIBRARIES
:
10524 return remote_read_qxfer
10525 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10526 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10528 case TARGET_OBJECT_LIBRARIES_SVR4
:
10529 return remote_read_qxfer
10530 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10531 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10533 case TARGET_OBJECT_MEMORY_MAP
:
10534 gdb_assert (annex
== NULL
);
10535 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10537 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10539 case TARGET_OBJECT_OSDATA
:
10540 /* Should only get here if we're connected. */
10541 gdb_assert (rs
->remote_desc
);
10542 return remote_read_qxfer
10543 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10544 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10546 case TARGET_OBJECT_THREADS
:
10547 gdb_assert (annex
== NULL
);
10548 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10550 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10552 case TARGET_OBJECT_TRACEFRAME_INFO
:
10553 gdb_assert (annex
== NULL
);
10554 return remote_read_qxfer
10555 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10556 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10558 case TARGET_OBJECT_FDPIC
:
10559 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10561 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10563 case TARGET_OBJECT_OPENVMS_UIB
:
10564 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10566 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10568 case TARGET_OBJECT_BTRACE
:
10569 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10571 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10573 case TARGET_OBJECT_BTRACE_CONF
:
10574 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10576 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10578 case TARGET_OBJECT_EXEC_FILE
:
10579 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10581 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10584 return TARGET_XFER_E_IO
;
10587 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10588 large enough let the caller deal with it. */
10589 if (len
< get_remote_packet_size ())
10590 return TARGET_XFER_E_IO
;
10591 len
= get_remote_packet_size ();
10593 /* Except for querying the minimum buffer size, target must be open. */
10594 if (!rs
->remote_desc
)
10595 error (_("remote query is only available after target open"));
10597 gdb_assert (annex
!= NULL
);
10598 gdb_assert (readbuf
!= NULL
);
10602 *p2
++ = query_type
;
10604 /* We used one buffer char for the remote protocol q command and
10605 another for the query type. As the remote protocol encapsulation
10606 uses 4 chars plus one extra in case we are debugging
10607 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10610 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10612 /* Bad caller may have sent forbidden characters. */
10613 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10618 gdb_assert (annex
[i
] == '\0');
10620 i
= putpkt (rs
->buf
);
10622 return TARGET_XFER_E_IO
;
10624 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10625 strcpy ((char *) readbuf
, rs
->buf
);
10627 *xfered_len
= strlen ((char *) readbuf
);
10628 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10631 /* Implementation of to_get_memory_xfer_limit. */
10634 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10636 return get_memory_write_packet_size ();
10640 remote_search_memory (struct target_ops
* ops
,
10641 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10642 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10643 CORE_ADDR
*found_addrp
)
10645 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10646 struct remote_state
*rs
= get_remote_state ();
10647 int max_size
= get_memory_write_packet_size ();
10648 struct packet_config
*packet
=
10649 &remote_protocol_packets
[PACKET_qSearch_memory
];
10650 /* Number of packet bytes used to encode the pattern;
10651 this could be more than PATTERN_LEN due to escape characters. */
10652 int escaped_pattern_len
;
10653 /* Amount of pattern that was encodable in the packet. */
10654 int used_pattern_len
;
10657 ULONGEST found_addr
;
10659 /* Don't go to the target if we don't have to. This is done before
10660 checking packet_config_support to avoid the possibility that a
10661 success for this edge case means the facility works in
10663 if (pattern_len
> search_space_len
)
10665 if (pattern_len
== 0)
10667 *found_addrp
= start_addr
;
10671 /* If we already know the packet isn't supported, fall back to the simple
10672 way of searching memory. */
10674 if (packet_config_support (packet
) == PACKET_DISABLE
)
10676 /* Target doesn't provided special support, fall back and use the
10677 standard support (copy memory and do the search here). */
10678 return simple_search_memory (ops
, start_addr
, search_space_len
,
10679 pattern
, pattern_len
, found_addrp
);
10682 /* Make sure the remote is pointing at the right process. */
10683 set_general_process ();
10685 /* Insert header. */
10686 i
= snprintf (rs
->buf
, max_size
,
10687 "qSearch:memory:%s;%s;",
10688 phex_nz (start_addr
, addr_size
),
10689 phex_nz (search_space_len
, sizeof (search_space_len
)));
10690 max_size
-= (i
+ 1);
10692 /* Escape as much data as fits into rs->buf. */
10693 escaped_pattern_len
=
10694 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10695 &used_pattern_len
, max_size
);
10697 /* Bail if the pattern is too large. */
10698 if (used_pattern_len
!= pattern_len
)
10699 error (_("Pattern is too large to transmit to remote target."));
10701 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10702 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10703 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10705 /* The request may not have worked because the command is not
10706 supported. If so, fall back to the simple way. */
10707 if (packet_config_support (packet
) == PACKET_DISABLE
)
10709 return simple_search_memory (ops
, start_addr
, search_space_len
,
10710 pattern
, pattern_len
, found_addrp
);
10715 if (rs
->buf
[0] == '0')
10717 else if (rs
->buf
[0] == '1')
10720 if (rs
->buf
[1] != ',')
10721 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10722 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10723 *found_addrp
= found_addr
;
10726 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10732 remote_rcmd (struct target_ops
*self
, const char *command
,
10733 struct ui_file
*outbuf
)
10735 struct remote_state
*rs
= get_remote_state ();
10738 if (!rs
->remote_desc
)
10739 error (_("remote rcmd is only available after target open"));
10741 /* Send a NULL command across as an empty command. */
10742 if (command
== NULL
)
10745 /* The query prefix. */
10746 strcpy (rs
->buf
, "qRcmd,");
10747 p
= strchr (rs
->buf
, '\0');
10749 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10750 > get_remote_packet_size ())
10751 error (_("\"monitor\" command ``%s'' is too long."), command
);
10753 /* Encode the actual command. */
10754 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10756 if (putpkt (rs
->buf
) < 0)
10757 error (_("Communication problem with target."));
10759 /* get/display the response */
10764 /* XXX - see also remote_get_noisy_reply(). */
10765 QUIT
; /* Allow user to bail out with ^C. */
10767 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10769 /* Timeout. Continue to (try to) read responses.
10770 This is better than stopping with an error, assuming the stub
10771 is still executing the (long) monitor command.
10772 If needed, the user can interrupt gdb using C-c, obtaining
10773 an effect similar to stop on timeout. */
10777 if (buf
[0] == '\0')
10778 error (_("Target does not support this command."));
10779 if (buf
[0] == 'O' && buf
[1] != 'K')
10781 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10784 if (strcmp (buf
, "OK") == 0)
10786 if (strlen (buf
) == 3 && buf
[0] == 'E'
10787 && isdigit (buf
[1]) && isdigit (buf
[2]))
10789 error (_("Protocol error with Rcmd"));
10791 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10793 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10795 fputc_unfiltered (c
, outbuf
);
10801 static std::vector
<mem_region
>
10802 remote_memory_map (struct target_ops
*ops
)
10804 std::vector
<mem_region
> result
;
10805 gdb::optional
<gdb::char_vector
> text
10806 = target_read_stralloc (¤t_target
, TARGET_OBJECT_MEMORY_MAP
, NULL
);
10809 result
= parse_memory_map (text
->data ());
10815 packet_command (const char *args
, int from_tty
)
10817 struct remote_state
*rs
= get_remote_state ();
10819 if (!rs
->remote_desc
)
10820 error (_("command can only be used with remote target"));
10823 error (_("remote-packet command requires packet text as argument"));
10825 puts_filtered ("sending: ");
10826 print_packet (args
);
10827 puts_filtered ("\n");
10830 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10831 puts_filtered ("received: ");
10832 print_packet (rs
->buf
);
10833 puts_filtered ("\n");
10837 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10839 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10841 static void threadset_test_cmd (char *cmd
, int tty
);
10843 static void threadalive_test (char *cmd
, int tty
);
10845 static void threadlist_test_cmd (char *cmd
, int tty
);
10847 int get_and_display_threadinfo (threadref
*ref
);
10849 static void threadinfo_test_cmd (char *cmd
, int tty
);
10851 static int thread_display_step (threadref
*ref
, void *context
);
10853 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10855 static void init_remote_threadtests (void);
10857 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10860 threadset_test_cmd (const char *cmd
, int tty
)
10862 int sample_thread
= SAMPLE_THREAD
;
10864 printf_filtered (_("Remote threadset test\n"));
10865 set_general_thread (sample_thread
);
10870 threadalive_test (const char *cmd
, int tty
)
10872 int sample_thread
= SAMPLE_THREAD
;
10873 int pid
= ptid_get_pid (inferior_ptid
);
10874 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10876 if (remote_thread_alive (ptid
))
10877 printf_filtered ("PASS: Thread alive test\n");
10879 printf_filtered ("FAIL: Thread alive test\n");
10882 void output_threadid (char *title
, threadref
*ref
);
10885 output_threadid (char *title
, threadref
*ref
)
10889 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10891 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10895 threadlist_test_cmd (const char *cmd
, int tty
)
10898 threadref nextthread
;
10899 int done
, result_count
;
10900 threadref threadlist
[3];
10902 printf_filtered ("Remote Threadlist test\n");
10903 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10904 &result_count
, &threadlist
[0]))
10905 printf_filtered ("FAIL: threadlist test\n");
10908 threadref
*scan
= threadlist
;
10909 threadref
*limit
= scan
+ result_count
;
10911 while (scan
< limit
)
10912 output_threadid (" thread ", scan
++);
10917 display_thread_info (struct gdb_ext_thread_info
*info
)
10919 output_threadid ("Threadid: ", &info
->threadid
);
10920 printf_filtered ("Name: %s\n ", info
->shortname
);
10921 printf_filtered ("State: %s\n", info
->display
);
10922 printf_filtered ("other: %s\n\n", info
->more_display
);
10926 get_and_display_threadinfo (threadref
*ref
)
10930 struct gdb_ext_thread_info threadinfo
;
10932 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10933 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10934 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10935 display_thread_info (&threadinfo
);
10940 threadinfo_test_cmd (const char *cmd
, int tty
)
10942 int athread
= SAMPLE_THREAD
;
10946 int_to_threadref (&thread
, athread
);
10947 printf_filtered ("Remote Threadinfo test\n");
10948 if (!get_and_display_threadinfo (&thread
))
10949 printf_filtered ("FAIL cannot get thread info\n");
10953 thread_display_step (threadref
*ref
, void *context
)
10955 /* output_threadid(" threadstep ",ref); *//* simple test */
10956 return get_and_display_threadinfo (ref
);
10960 threadlist_update_test_cmd (const char *cmd
, int tty
)
10962 printf_filtered ("Remote Threadlist update test\n");
10963 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10967 init_remote_threadtests (void)
10969 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10970 _("Fetch and print the remote list of "
10971 "thread identifiers, one pkt only"));
10972 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
10973 _("Fetch and display info about one thread"));
10974 add_com ("tset", class_obscure
, threadset_test_cmd
,
10975 _("Test setting to a different thread"));
10976 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
10977 _("Iterate through updating all remote thread info"));
10978 add_com ("talive", class_obscure
, threadalive_test
,
10979 _(" Remote thread alive test "));
10984 /* Convert a thread ID to a string. Returns the string in a static
10987 static const char *
10988 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
10990 static char buf
[64];
10991 struct remote_state
*rs
= get_remote_state ();
10993 if (ptid_equal (ptid
, null_ptid
))
10994 return normal_pid_to_str (ptid
);
10995 else if (ptid_is_pid (ptid
))
10997 /* Printing an inferior target id. */
10999 /* When multi-process extensions are off, there's no way in the
11000 remote protocol to know the remote process id, if there's any
11001 at all. There's one exception --- when we're connected with
11002 target extended-remote, and we manually attached to a process
11003 with "attach PID". We don't record anywhere a flag that
11004 allows us to distinguish that case from the case of
11005 connecting with extended-remote and the stub already being
11006 attached to a process, and reporting yes to qAttached, hence
11007 no smart special casing here. */
11008 if (!remote_multi_process_p (rs
))
11010 xsnprintf (buf
, sizeof buf
, "Remote target");
11014 return normal_pid_to_str (ptid
);
11018 if (ptid_equal (magic_null_ptid
, ptid
))
11019 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11020 else if (remote_multi_process_p (rs
))
11021 if (ptid_get_lwp (ptid
) == 0)
11022 return normal_pid_to_str (ptid
);
11024 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11025 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
11027 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11028 ptid_get_lwp (ptid
));
11033 /* Get the address of the thread local variable in OBJFILE which is
11034 stored at OFFSET within the thread local storage for thread PTID. */
11037 remote_get_thread_local_address (struct target_ops
*ops
,
11038 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11040 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11042 struct remote_state
*rs
= get_remote_state ();
11044 char *endp
= rs
->buf
+ get_remote_packet_size ();
11045 enum packet_result result
;
11047 strcpy (p
, "qGetTLSAddr:");
11049 p
= write_ptid (p
, endp
, ptid
);
11051 p
+= hexnumstr (p
, offset
);
11053 p
+= hexnumstr (p
, lm
);
11057 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11058 result
= packet_ok (rs
->buf
,
11059 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11060 if (result
== PACKET_OK
)
11064 unpack_varlen_hex (rs
->buf
, &result
);
11067 else if (result
== PACKET_UNKNOWN
)
11068 throw_error (TLS_GENERIC_ERROR
,
11069 _("Remote target doesn't support qGetTLSAddr packet"));
11071 throw_error (TLS_GENERIC_ERROR
,
11072 _("Remote target failed to process qGetTLSAddr request"));
11075 throw_error (TLS_GENERIC_ERROR
,
11076 _("TLS not supported or disabled on this target"));
11081 /* Provide thread local base, i.e. Thread Information Block address.
11082 Returns 1 if ptid is found and thread_local_base is non zero. */
11085 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11087 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11089 struct remote_state
*rs
= get_remote_state ();
11091 char *endp
= rs
->buf
+ get_remote_packet_size ();
11092 enum packet_result result
;
11094 strcpy (p
, "qGetTIBAddr:");
11096 p
= write_ptid (p
, endp
, ptid
);
11100 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11101 result
= packet_ok (rs
->buf
,
11102 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11103 if (result
== PACKET_OK
)
11107 unpack_varlen_hex (rs
->buf
, &result
);
11109 *addr
= (CORE_ADDR
) result
;
11112 else if (result
== PACKET_UNKNOWN
)
11113 error (_("Remote target doesn't support qGetTIBAddr packet"));
11115 error (_("Remote target failed to process qGetTIBAddr request"));
11118 error (_("qGetTIBAddr not supported or disabled on this target"));
11123 /* Support for inferring a target description based on the current
11124 architecture and the size of a 'g' packet. While the 'g' packet
11125 can have any size (since optional registers can be left off the
11126 end), some sizes are easily recognizable given knowledge of the
11127 approximate architecture. */
11129 struct remote_g_packet_guess
11132 const struct target_desc
*tdesc
;
11134 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11135 DEF_VEC_O(remote_g_packet_guess_s
);
11137 struct remote_g_packet_data
11139 VEC(remote_g_packet_guess_s
) *guesses
;
11142 static struct gdbarch_data
*remote_g_packet_data_handle
;
11145 remote_g_packet_data_init (struct obstack
*obstack
)
11147 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11151 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11152 const struct target_desc
*tdesc
)
11154 struct remote_g_packet_data
*data
11155 = ((struct remote_g_packet_data
*)
11156 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11157 struct remote_g_packet_guess new_guess
, *guess
;
11160 gdb_assert (tdesc
!= NULL
);
11163 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11165 if (guess
->bytes
== bytes
)
11166 internal_error (__FILE__
, __LINE__
,
11167 _("Duplicate g packet description added for size %d"),
11170 new_guess
.bytes
= bytes
;
11171 new_guess
.tdesc
= tdesc
;
11172 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11175 /* Return 1 if remote_read_description would do anything on this target
11176 and architecture, 0 otherwise. */
11179 remote_read_description_p (struct target_ops
*target
)
11181 struct remote_g_packet_data
*data
11182 = ((struct remote_g_packet_data
*)
11183 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11185 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11191 static const struct target_desc
*
11192 remote_read_description (struct target_ops
*target
)
11194 struct remote_g_packet_data
*data
11195 = ((struct remote_g_packet_data
*)
11196 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11198 /* Do not try this during initial connection, when we do not know
11199 whether there is a running but stopped thread. */
11200 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11201 return target
->beneath
->to_read_description (target
->beneath
);
11203 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11205 struct remote_g_packet_guess
*guess
;
11207 int bytes
= send_g_packet ();
11210 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11212 if (guess
->bytes
== bytes
)
11213 return guess
->tdesc
;
11215 /* We discard the g packet. A minor optimization would be to
11216 hold on to it, and fill the register cache once we have selected
11217 an architecture, but it's too tricky to do safely. */
11220 return target
->beneath
->to_read_description (target
->beneath
);
11223 /* Remote file transfer support. This is host-initiated I/O, not
11224 target-initiated; for target-initiated, see remote-fileio.c. */
11226 /* If *LEFT is at least the length of STRING, copy STRING to
11227 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11228 decrease *LEFT. Otherwise raise an error. */
11231 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11233 int len
= strlen (string
);
11236 error (_("Packet too long for target."));
11238 memcpy (*buffer
, string
, len
);
11242 /* NUL-terminate the buffer as a convenience, if there is
11248 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11249 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11250 decrease *LEFT. Otherwise raise an error. */
11253 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11256 if (2 * len
> *left
)
11257 error (_("Packet too long for target."));
11259 bin2hex (bytes
, *buffer
, len
);
11260 *buffer
+= 2 * len
;
11263 /* NUL-terminate the buffer as a convenience, if there is
11269 /* If *LEFT is large enough, convert VALUE to hex and add it to
11270 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11271 decrease *LEFT. Otherwise raise an error. */
11274 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11276 int len
= hexnumlen (value
);
11279 error (_("Packet too long for target."));
11281 hexnumstr (*buffer
, value
);
11285 /* NUL-terminate the buffer as a convenience, if there is
11291 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11292 value, *REMOTE_ERRNO to the remote error number or zero if none
11293 was included, and *ATTACHMENT to point to the start of the annex
11294 if any. The length of the packet isn't needed here; there may
11295 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11297 Return 0 if the packet could be parsed, -1 if it could not. If
11298 -1 is returned, the other variables may not be initialized. */
11301 remote_hostio_parse_result (char *buffer
, int *retcode
,
11302 int *remote_errno
, char **attachment
)
11307 *attachment
= NULL
;
11309 if (buffer
[0] != 'F')
11313 *retcode
= strtol (&buffer
[1], &p
, 16);
11314 if (errno
!= 0 || p
== &buffer
[1])
11317 /* Check for ",errno". */
11321 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11322 if (errno
!= 0 || p
+ 1 == p2
)
11327 /* Check for ";attachment". If there is no attachment, the
11328 packet should end here. */
11331 *attachment
= p
+ 1;
11334 else if (*p
== '\0')
11340 /* Send a prepared I/O packet to the target and read its response.
11341 The prepared packet is in the global RS->BUF before this function
11342 is called, and the answer is there when we return.
11344 COMMAND_BYTES is the length of the request to send, which may include
11345 binary data. WHICH_PACKET is the packet configuration to check
11346 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11347 is set to the error number and -1 is returned. Otherwise the value
11348 returned by the function is returned.
11350 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11351 attachment is expected; an error will be reported if there's a
11352 mismatch. If one is found, *ATTACHMENT will be set to point into
11353 the packet buffer and *ATTACHMENT_LEN will be set to the
11354 attachment's length. */
11357 remote_hostio_send_command (int command_bytes
, int which_packet
,
11358 int *remote_errno
, char **attachment
,
11359 int *attachment_len
)
11361 struct remote_state
*rs
= get_remote_state ();
11362 int ret
, bytes_read
;
11363 char *attachment_tmp
;
11365 if (packet_support (which_packet
) == PACKET_DISABLE
)
11367 *remote_errno
= FILEIO_ENOSYS
;
11371 putpkt_binary (rs
->buf
, command_bytes
);
11372 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11374 /* If it timed out, something is wrong. Don't try to parse the
11376 if (bytes_read
< 0)
11378 *remote_errno
= FILEIO_EINVAL
;
11382 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11385 *remote_errno
= FILEIO_EINVAL
;
11387 case PACKET_UNKNOWN
:
11388 *remote_errno
= FILEIO_ENOSYS
;
11394 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11397 *remote_errno
= FILEIO_EINVAL
;
11401 /* Make sure we saw an attachment if and only if we expected one. */
11402 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11403 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11405 *remote_errno
= FILEIO_EINVAL
;
11409 /* If an attachment was found, it must point into the packet buffer;
11410 work out how many bytes there were. */
11411 if (attachment_tmp
!= NULL
)
11413 *attachment
= attachment_tmp
;
11414 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11420 /* Invalidate the readahead cache. */
11423 readahead_cache_invalidate (void)
11425 struct remote_state
*rs
= get_remote_state ();
11427 rs
->readahead_cache
.fd
= -1;
11430 /* Invalidate the readahead cache if it is holding data for FD. */
11433 readahead_cache_invalidate_fd (int fd
)
11435 struct remote_state
*rs
= get_remote_state ();
11437 if (rs
->readahead_cache
.fd
== fd
)
11438 rs
->readahead_cache
.fd
= -1;
11441 /* Set the filesystem remote_hostio functions that take FILENAME
11442 arguments will use. Return 0 on success, or -1 if an error
11443 occurs (and set *REMOTE_ERRNO). */
11446 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11448 struct remote_state
*rs
= get_remote_state ();
11449 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11451 int left
= get_remote_packet_size () - 1;
11455 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11458 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11461 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11463 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11464 remote_buffer_add_string (&p
, &left
, arg
);
11466 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11467 remote_errno
, NULL
, NULL
);
11469 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11473 rs
->fs_pid
= required_pid
;
11478 /* Implementation of to_fileio_open. */
11481 remote_hostio_open (struct target_ops
*self
,
11482 struct inferior
*inf
, const char *filename
,
11483 int flags
, int mode
, int warn_if_slow
,
11486 struct remote_state
*rs
= get_remote_state ();
11488 int left
= get_remote_packet_size () - 1;
11492 static int warning_issued
= 0;
11494 printf_unfiltered (_("Reading %s from remote target...\n"),
11497 if (!warning_issued
)
11499 warning (_("File transfers from remote targets can be slow."
11500 " Use \"set sysroot\" to access files locally"
11502 warning_issued
= 1;
11506 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11509 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11511 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11512 strlen (filename
));
11513 remote_buffer_add_string (&p
, &left
, ",");
11515 remote_buffer_add_int (&p
, &left
, flags
);
11516 remote_buffer_add_string (&p
, &left
, ",");
11518 remote_buffer_add_int (&p
, &left
, mode
);
11520 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11521 remote_errno
, NULL
, NULL
);
11524 /* Implementation of to_fileio_pwrite. */
11527 remote_hostio_pwrite (struct target_ops
*self
,
11528 int fd
, const gdb_byte
*write_buf
, int len
,
11529 ULONGEST offset
, int *remote_errno
)
11531 struct remote_state
*rs
= get_remote_state ();
11533 int left
= get_remote_packet_size ();
11536 readahead_cache_invalidate_fd (fd
);
11538 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11540 remote_buffer_add_int (&p
, &left
, fd
);
11541 remote_buffer_add_string (&p
, &left
, ",");
11543 remote_buffer_add_int (&p
, &left
, offset
);
11544 remote_buffer_add_string (&p
, &left
, ",");
11546 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11547 get_remote_packet_size () - (p
- rs
->buf
));
11549 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11550 remote_errno
, NULL
, NULL
);
11553 /* Helper for the implementation of to_fileio_pread. Read the file
11554 from the remote side with vFile:pread. */
11557 remote_hostio_pread_vFile (struct target_ops
*self
,
11558 int fd
, gdb_byte
*read_buf
, int len
,
11559 ULONGEST offset
, int *remote_errno
)
11561 struct remote_state
*rs
= get_remote_state ();
11564 int left
= get_remote_packet_size ();
11565 int ret
, attachment_len
;
11568 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11570 remote_buffer_add_int (&p
, &left
, fd
);
11571 remote_buffer_add_string (&p
, &left
, ",");
11573 remote_buffer_add_int (&p
, &left
, len
);
11574 remote_buffer_add_string (&p
, &left
, ",");
11576 remote_buffer_add_int (&p
, &left
, offset
);
11578 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11579 remote_errno
, &attachment
,
11585 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11587 if (read_len
!= ret
)
11588 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11593 /* Serve pread from the readahead cache. Returns number of bytes
11594 read, or 0 if the request can't be served from the cache. */
11597 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11598 int fd
, gdb_byte
*read_buf
, size_t len
,
11601 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11603 if (cache
->fd
== fd
11604 && cache
->offset
<= offset
11605 && offset
< cache
->offset
+ cache
->bufsize
)
11607 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11609 if (offset
+ len
> max
)
11610 len
= max
- offset
;
11612 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11619 /* Implementation of to_fileio_pread. */
11622 remote_hostio_pread (struct target_ops
*self
,
11623 int fd
, gdb_byte
*read_buf
, int len
,
11624 ULONGEST offset
, int *remote_errno
)
11627 struct remote_state
*rs
= get_remote_state ();
11628 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11630 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11633 cache
->hit_count
++;
11636 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11637 pulongest (cache
->hit_count
));
11641 cache
->miss_count
++;
11643 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11644 pulongest (cache
->miss_count
));
11647 cache
->offset
= offset
;
11648 cache
->bufsize
= get_remote_packet_size ();
11649 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11651 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11652 cache
->offset
, remote_errno
);
11655 readahead_cache_invalidate_fd (fd
);
11659 cache
->bufsize
= ret
;
11660 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11663 /* Implementation of to_fileio_close. */
11666 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11668 struct remote_state
*rs
= get_remote_state ();
11670 int left
= get_remote_packet_size () - 1;
11672 readahead_cache_invalidate_fd (fd
);
11674 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11676 remote_buffer_add_int (&p
, &left
, fd
);
11678 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11679 remote_errno
, NULL
, NULL
);
11682 /* Implementation of to_fileio_unlink. */
11685 remote_hostio_unlink (struct target_ops
*self
,
11686 struct inferior
*inf
, const char *filename
,
11689 struct remote_state
*rs
= get_remote_state ();
11691 int left
= get_remote_packet_size () - 1;
11693 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11696 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11698 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11699 strlen (filename
));
11701 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11702 remote_errno
, NULL
, NULL
);
11705 /* Implementation of to_fileio_readlink. */
11707 static gdb::optional
<std::string
>
11708 remote_hostio_readlink (struct target_ops
*self
,
11709 struct inferior
*inf
, const char *filename
,
11712 struct remote_state
*rs
= get_remote_state ();
11715 int left
= get_remote_packet_size ();
11716 int len
, attachment_len
;
11719 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11722 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11724 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11725 strlen (filename
));
11727 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11728 remote_errno
, &attachment
,
11734 std::string
ret (len
, '\0');
11736 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11737 (gdb_byte
*) &ret
[0], len
);
11738 if (read_len
!= len
)
11739 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11744 /* Implementation of to_fileio_fstat. */
11747 remote_hostio_fstat (struct target_ops
*self
,
11748 int fd
, struct stat
*st
,
11751 struct remote_state
*rs
= get_remote_state ();
11753 int left
= get_remote_packet_size ();
11754 int attachment_len
, ret
;
11756 struct fio_stat fst
;
11759 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11761 remote_buffer_add_int (&p
, &left
, fd
);
11763 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11764 remote_errno
, &attachment
,
11768 if (*remote_errno
!= FILEIO_ENOSYS
)
11771 /* Strictly we should return -1, ENOSYS here, but when
11772 "set sysroot remote:" was implemented in August 2008
11773 BFD's need for a stat function was sidestepped with
11774 this hack. This was not remedied until March 2015
11775 so we retain the previous behavior to avoid breaking
11778 Note that the memset is a March 2015 addition; older
11779 GDBs set st_size *and nothing else* so the structure
11780 would have garbage in all other fields. This might
11781 break something but retaining the previous behavior
11782 here would be just too wrong. */
11784 memset (st
, 0, sizeof (struct stat
));
11785 st
->st_size
= INT_MAX
;
11789 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11790 (gdb_byte
*) &fst
, sizeof (fst
));
11792 if (read_len
!= ret
)
11793 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11795 if (read_len
!= sizeof (fst
))
11796 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11797 read_len
, (int) sizeof (fst
));
11799 remote_fileio_to_host_stat (&fst
, st
);
11804 /* Implementation of to_filesystem_is_local. */
11807 remote_filesystem_is_local (struct target_ops
*self
)
11809 /* Valgrind GDB presents itself as a remote target but works
11810 on the local filesystem: it does not implement remote get
11811 and users are not expected to set a sysroot. To handle
11812 this case we treat the remote filesystem as local if the
11813 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11814 does not support vFile:open. */
11815 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11817 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11819 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11821 int fd
, remote_errno
;
11823 /* Try opening a file to probe support. The supplied
11824 filename is irrelevant, we only care about whether
11825 the stub recognizes the packet or not. */
11826 fd
= remote_hostio_open (self
, NULL
, "just probing",
11827 FILEIO_O_RDONLY
, 0700, 0,
11831 remote_hostio_close (self
, fd
, &remote_errno
);
11833 ps
= packet_support (PACKET_vFile_open
);
11836 if (ps
== PACKET_DISABLE
)
11838 static int warning_issued
= 0;
11840 if (!warning_issued
)
11842 warning (_("remote target does not support file"
11843 " transfer, attempting to access files"
11844 " from local filesystem."));
11845 warning_issued
= 1;
11856 remote_fileio_errno_to_host (int errnum
)
11862 case FILEIO_ENOENT
:
11870 case FILEIO_EACCES
:
11872 case FILEIO_EFAULT
:
11876 case FILEIO_EEXIST
:
11878 case FILEIO_ENODEV
:
11880 case FILEIO_ENOTDIR
:
11882 case FILEIO_EISDIR
:
11884 case FILEIO_EINVAL
:
11886 case FILEIO_ENFILE
:
11888 case FILEIO_EMFILE
:
11892 case FILEIO_ENOSPC
:
11894 case FILEIO_ESPIPE
:
11898 case FILEIO_ENOSYS
:
11900 case FILEIO_ENAMETOOLONG
:
11901 return ENAMETOOLONG
;
11907 remote_hostio_error (int errnum
)
11909 int host_error
= remote_fileio_errno_to_host (errnum
);
11911 if (host_error
== -1)
11912 error (_("Unknown remote I/O error %d"), errnum
);
11914 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11918 remote_hostio_close_cleanup (void *opaque
)
11920 int fd
= *(int *) opaque
;
11923 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11927 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11929 struct cleanup
*back_to
, *close_cleanup
;
11930 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11932 int bytes_in_buffer
;
11935 struct remote_state
*rs
= get_remote_state ();
11937 if (!rs
->remote_desc
)
11938 error (_("command can only be used with remote target"));
11940 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
11942 perror_with_name (local_file
);
11944 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11945 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11947 0700, 0, &remote_errno
);
11949 remote_hostio_error (remote_errno
);
11951 /* Send up to this many bytes at once. They won't all fit in the
11952 remote packet limit, so we'll transfer slightly fewer. */
11953 io_size
= get_remote_packet_size ();
11954 buffer
= (gdb_byte
*) xmalloc (io_size
);
11955 back_to
= make_cleanup (xfree
, buffer
);
11957 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11959 bytes_in_buffer
= 0;
11962 while (bytes_in_buffer
|| !saw_eof
)
11966 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11967 io_size
- bytes_in_buffer
,
11971 if (ferror (file
.get ()))
11972 error (_("Error reading %s."), local_file
);
11975 /* EOF. Unless there is something still in the
11976 buffer from the last iteration, we are done. */
11978 if (bytes_in_buffer
== 0)
11986 bytes
+= bytes_in_buffer
;
11987 bytes_in_buffer
= 0;
11989 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
11991 offset
, &remote_errno
);
11994 remote_hostio_error (remote_errno
);
11995 else if (retcode
== 0)
11996 error (_("Remote write of %d bytes returned 0!"), bytes
);
11997 else if (retcode
< bytes
)
11999 /* Short write. Save the rest of the read data for the next
12001 bytes_in_buffer
= bytes
- retcode
;
12002 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
12008 discard_cleanups (close_cleanup
);
12009 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12010 remote_hostio_error (remote_errno
);
12013 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12014 do_cleanups (back_to
);
12018 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12020 struct cleanup
*back_to
, *close_cleanup
;
12021 int fd
, remote_errno
, bytes
, io_size
;
12024 struct remote_state
*rs
= get_remote_state ();
12026 if (!rs
->remote_desc
)
12027 error (_("command can only be used with remote target"));
12029 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12030 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12033 remote_hostio_error (remote_errno
);
12035 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12037 perror_with_name (local_file
);
12039 /* Send up to this many bytes at once. They won't all fit in the
12040 remote packet limit, so we'll transfer slightly fewer. */
12041 io_size
= get_remote_packet_size ();
12042 buffer
= (gdb_byte
*) xmalloc (io_size
);
12043 back_to
= make_cleanup (xfree
, buffer
);
12045 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12050 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12051 fd
, buffer
, io_size
, offset
, &remote_errno
);
12053 /* Success, but no bytes, means end-of-file. */
12056 remote_hostio_error (remote_errno
);
12060 bytes
= fwrite (buffer
, 1, bytes
, file
.get ());
12062 perror_with_name (local_file
);
12065 discard_cleanups (close_cleanup
);
12066 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12067 remote_hostio_error (remote_errno
);
12070 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12071 do_cleanups (back_to
);
12075 remote_file_delete (const char *remote_file
, int from_tty
)
12077 int retcode
, remote_errno
;
12078 struct remote_state
*rs
= get_remote_state ();
12080 if (!rs
->remote_desc
)
12081 error (_("command can only be used with remote target"));
12083 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12084 NULL
, remote_file
, &remote_errno
);
12086 remote_hostio_error (remote_errno
);
12089 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12093 remote_put_command (const char *args
, int from_tty
)
12096 error_no_arg (_("file to put"));
12098 gdb_argv
argv (args
);
12099 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12100 error (_("Invalid parameters to remote put"));
12102 remote_file_put (argv
[0], argv
[1], from_tty
);
12106 remote_get_command (const char *args
, int from_tty
)
12109 error_no_arg (_("file to get"));
12111 gdb_argv
argv (args
);
12112 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12113 error (_("Invalid parameters to remote get"));
12115 remote_file_get (argv
[0], argv
[1], from_tty
);
12119 remote_delete_command (const char *args
, int from_tty
)
12122 error_no_arg (_("file to delete"));
12124 gdb_argv
argv (args
);
12125 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12126 error (_("Invalid parameters to remote delete"));
12128 remote_file_delete (argv
[0], from_tty
);
12132 remote_command (const char *args
, int from_tty
)
12134 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12138 remote_can_execute_reverse (struct target_ops
*self
)
12140 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12141 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12148 remote_supports_non_stop (struct target_ops
*self
)
12154 remote_supports_disable_randomization (struct target_ops
*self
)
12156 /* Only supported in extended mode. */
12161 remote_supports_multi_process (struct target_ops
*self
)
12163 struct remote_state
*rs
= get_remote_state ();
12165 return remote_multi_process_p (rs
);
12169 remote_supports_cond_tracepoints (void)
12171 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12175 remote_supports_cond_breakpoints (struct target_ops
*self
)
12177 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12181 remote_supports_fast_tracepoints (void)
12183 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12187 remote_supports_static_tracepoints (void)
12189 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12193 remote_supports_install_in_trace (void)
12195 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12199 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12201 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12206 remote_supports_string_tracing (struct target_ops
*self
)
12208 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12212 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12214 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12218 remote_trace_init (struct target_ops
*self
)
12220 struct remote_state
*rs
= get_remote_state ();
12223 remote_get_noisy_reply ();
12224 if (strcmp (rs
->buf
, "OK") != 0)
12225 error (_("Target does not support this command."));
12228 /* Recursive routine to walk through command list including loops, and
12229 download packets for each command. */
12232 remote_download_command_source (int num
, ULONGEST addr
,
12233 struct command_line
*cmds
)
12235 struct remote_state
*rs
= get_remote_state ();
12236 struct command_line
*cmd
;
12238 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12240 QUIT
; /* Allow user to bail out with ^C. */
12241 strcpy (rs
->buf
, "QTDPsrc:");
12242 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12243 rs
->buf
+ strlen (rs
->buf
),
12244 rs
->buf_size
- strlen (rs
->buf
));
12246 remote_get_noisy_reply ();
12247 if (strcmp (rs
->buf
, "OK"))
12248 warning (_("Target does not support source download."));
12250 if (cmd
->control_type
== while_control
12251 || cmd
->control_type
== while_stepping_control
)
12253 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12255 QUIT
; /* Allow user to bail out with ^C. */
12256 strcpy (rs
->buf
, "QTDPsrc:");
12257 encode_source_string (num
, addr
, "cmd", "end",
12258 rs
->buf
+ strlen (rs
->buf
),
12259 rs
->buf_size
- strlen (rs
->buf
));
12261 remote_get_noisy_reply ();
12262 if (strcmp (rs
->buf
, "OK"))
12263 warning (_("Target does not support source download."));
12269 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12271 #define BUF_SIZE 2048
12275 char buf
[BUF_SIZE
];
12276 std::vector
<std::string
> tdp_actions
;
12277 std::vector
<std::string
> stepping_actions
;
12279 struct breakpoint
*b
= loc
->owner
;
12280 struct tracepoint
*t
= (struct tracepoint
*) b
;
12281 struct remote_state
*rs
= get_remote_state ();
12283 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12285 tpaddr
= loc
->address
;
12286 sprintf_vma (addrbuf
, tpaddr
);
12287 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12288 addrbuf
, /* address */
12289 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12290 t
->step_count
, t
->pass_count
);
12291 /* Fast tracepoints are mostly handled by the target, but we can
12292 tell the target how big of an instruction block should be moved
12294 if (b
->type
== bp_fast_tracepoint
)
12296 /* Only test for support at download time; we may not know
12297 target capabilities at definition time. */
12298 if (remote_supports_fast_tracepoints ())
12300 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12302 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12303 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12305 /* If it passed validation at definition but fails now,
12306 something is very wrong. */
12307 internal_error (__FILE__
, __LINE__
,
12308 _("Fast tracepoint not "
12309 "valid during download"));
12312 /* Fast tracepoints are functionally identical to regular
12313 tracepoints, so don't take lack of support as a reason to
12314 give up on the trace run. */
12315 warning (_("Target does not support fast tracepoints, "
12316 "downloading %d as regular tracepoint"), b
->number
);
12318 else if (b
->type
== bp_static_tracepoint
)
12320 /* Only test for support at download time; we may not know
12321 target capabilities at definition time. */
12322 if (remote_supports_static_tracepoints ())
12324 struct static_tracepoint_marker marker
;
12326 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12327 strcat (buf
, ":S");
12329 error (_("Static tracepoint not valid during download"));
12332 /* Fast tracepoints are functionally identical to regular
12333 tracepoints, so don't take lack of support as a reason
12334 to give up on the trace run. */
12335 error (_("Target does not support static tracepoints"));
12337 /* If the tracepoint has a conditional, make it into an agent
12338 expression and append to the definition. */
12341 /* Only test support at download time, we may not know target
12342 capabilities at definition time. */
12343 if (remote_supports_cond_tracepoints ())
12345 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12346 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12348 pkt
= buf
+ strlen (buf
);
12349 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12350 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12354 warning (_("Target does not support conditional tracepoints, "
12355 "ignoring tp %d cond"), b
->number
);
12358 if (b
->commands
|| *default_collect
)
12361 remote_get_noisy_reply ();
12362 if (strcmp (rs
->buf
, "OK"))
12363 error (_("Target does not support tracepoints."));
12365 /* do_single_steps (t); */
12366 for (auto action_it
= tdp_actions
.begin ();
12367 action_it
!= tdp_actions
.end (); action_it
++)
12369 QUIT
; /* Allow user to bail out with ^C. */
12371 bool has_more
= (action_it
!= tdp_actions
.end ()
12372 || !stepping_actions
.empty ());
12374 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12375 b
->number
, addrbuf
, /* address */
12376 action_it
->c_str (),
12377 has_more
? '-' : 0);
12379 remote_get_noisy_reply ();
12380 if (strcmp (rs
->buf
, "OK"))
12381 error (_("Error on target while setting tracepoints."));
12384 for (auto action_it
= stepping_actions
.begin ();
12385 action_it
!= stepping_actions
.end (); action_it
++)
12387 QUIT
; /* Allow user to bail out with ^C. */
12389 bool is_first
= action_it
== stepping_actions
.begin ();
12390 bool has_more
= action_it
!= stepping_actions
.end ();
12392 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12393 b
->number
, addrbuf
, /* address */
12394 is_first
? "S" : "",
12395 action_it
->c_str (),
12396 has_more
? "-" : "");
12398 remote_get_noisy_reply ();
12399 if (strcmp (rs
->buf
, "OK"))
12400 error (_("Error on target while setting tracepoints."));
12403 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12405 if (b
->location
!= NULL
)
12407 strcpy (buf
, "QTDPsrc:");
12408 encode_source_string (b
->number
, loc
->address
, "at",
12409 event_location_to_string (b
->location
.get ()),
12410 buf
+ strlen (buf
), 2048 - strlen (buf
));
12412 remote_get_noisy_reply ();
12413 if (strcmp (rs
->buf
, "OK"))
12414 warning (_("Target does not support source download."));
12416 if (b
->cond_string
)
12418 strcpy (buf
, "QTDPsrc:");
12419 encode_source_string (b
->number
, loc
->address
,
12420 "cond", b
->cond_string
, buf
+ strlen (buf
),
12421 2048 - strlen (buf
));
12423 remote_get_noisy_reply ();
12424 if (strcmp (rs
->buf
, "OK"))
12425 warning (_("Target does not support source download."));
12427 remote_download_command_source (b
->number
, loc
->address
,
12428 breakpoint_commands (b
));
12433 remote_can_download_tracepoint (struct target_ops
*self
)
12435 struct remote_state
*rs
= get_remote_state ();
12436 struct trace_status
*ts
;
12439 /* Don't try to install tracepoints until we've relocated our
12440 symbols, and fetched and merged the target's tracepoint list with
12442 if (rs
->starting_up
)
12445 ts
= current_trace_status ();
12446 status
= remote_get_trace_status (self
, ts
);
12448 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12451 /* If we are in a tracing experiment, but remote stub doesn't support
12452 installing tracepoint in trace, we have to return. */
12453 if (!remote_supports_install_in_trace ())
12461 remote_download_trace_state_variable (struct target_ops
*self
,
12462 const trace_state_variable
&tsv
)
12464 struct remote_state
*rs
= get_remote_state ();
12467 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12468 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
12470 p
= rs
->buf
+ strlen (rs
->buf
);
12471 if ((p
- rs
->buf
) + tsv
.name
.length () * 2 >= get_remote_packet_size ())
12472 error (_("Trace state variable name too long for tsv definition packet"));
12473 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
12476 remote_get_noisy_reply ();
12477 if (*rs
->buf
== '\0')
12478 error (_("Target does not support this command."));
12479 if (strcmp (rs
->buf
, "OK") != 0)
12480 error (_("Error on target while downloading trace state variable."));
12484 remote_enable_tracepoint (struct target_ops
*self
,
12485 struct bp_location
*location
)
12487 struct remote_state
*rs
= get_remote_state ();
12490 sprintf_vma (addr_buf
, location
->address
);
12491 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12492 location
->owner
->number
, addr_buf
);
12494 remote_get_noisy_reply ();
12495 if (*rs
->buf
== '\0')
12496 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12497 if (strcmp (rs
->buf
, "OK") != 0)
12498 error (_("Error on target while enabling tracepoint."));
12502 remote_disable_tracepoint (struct target_ops
*self
,
12503 struct bp_location
*location
)
12505 struct remote_state
*rs
= get_remote_state ();
12508 sprintf_vma (addr_buf
, location
->address
);
12509 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12510 location
->owner
->number
, addr_buf
);
12512 remote_get_noisy_reply ();
12513 if (*rs
->buf
== '\0')
12514 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12515 if (strcmp (rs
->buf
, "OK") != 0)
12516 error (_("Error on target while disabling tracepoint."));
12520 remote_trace_set_readonly_regions (struct target_ops
*self
)
12524 bfd_size_type size
;
12530 return; /* No information to give. */
12532 struct remote_state
*rs
= get_remote_state ();
12534 strcpy (rs
->buf
, "QTro");
12535 offset
= strlen (rs
->buf
);
12536 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12538 char tmp1
[40], tmp2
[40];
12541 if ((s
->flags
& SEC_LOAD
) == 0 ||
12542 /* (s->flags & SEC_CODE) == 0 || */
12543 (s
->flags
& SEC_READONLY
) == 0)
12547 vma
= bfd_get_section_vma (abfd
, s
);
12548 size
= bfd_get_section_size (s
);
12549 sprintf_vma (tmp1
, vma
);
12550 sprintf_vma (tmp2
, vma
+ size
);
12551 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12552 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
12554 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12556 Too many sections for read-only sections definition packet."));
12559 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
12561 offset
+= sec_length
;
12566 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12571 remote_trace_start (struct target_ops
*self
)
12573 struct remote_state
*rs
= get_remote_state ();
12575 putpkt ("QTStart");
12576 remote_get_noisy_reply ();
12577 if (*rs
->buf
== '\0')
12578 error (_("Target does not support this command."));
12579 if (strcmp (rs
->buf
, "OK") != 0)
12580 error (_("Bogus reply from target: %s"), rs
->buf
);
12584 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12586 /* Initialize it just to avoid a GCC false warning. */
12588 /* FIXME we need to get register block size some other way. */
12589 extern int trace_regblock_size
;
12590 enum packet_result result
;
12591 struct remote_state
*rs
= get_remote_state ();
12593 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12596 trace_regblock_size
12597 = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
12599 putpkt ("qTStatus");
12603 p
= remote_get_noisy_reply ();
12605 CATCH (ex
, RETURN_MASK_ERROR
)
12607 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12609 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12612 throw_exception (ex
);
12616 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12618 /* If the remote target doesn't do tracing, flag it. */
12619 if (result
== PACKET_UNKNOWN
)
12622 /* We're working with a live target. */
12623 ts
->filename
= NULL
;
12626 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
12628 /* Function 'parse_trace_status' sets default value of each field of
12629 'ts' at first, so we don't have to do it here. */
12630 parse_trace_status (p
, ts
);
12632 return ts
->running
;
12636 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12637 struct uploaded_tp
*utp
)
12639 struct remote_state
*rs
= get_remote_state ();
12641 struct bp_location
*loc
;
12642 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12643 size_t size
= get_remote_packet_size ();
12648 tp
->traceframe_usage
= 0;
12649 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
12651 /* If the tracepoint was never downloaded, don't go asking for
12653 if (tp
->number_on_target
== 0)
12655 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12656 phex_nz (loc
->address
, 0));
12658 reply
= remote_get_noisy_reply ();
12659 if (reply
&& *reply
)
12662 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12668 utp
->hit_count
= 0;
12669 utp
->traceframe_usage
= 0;
12670 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12671 phex_nz (utp
->addr
, 0));
12673 reply
= remote_get_noisy_reply ();
12674 if (reply
&& *reply
)
12677 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12683 remote_trace_stop (struct target_ops
*self
)
12685 struct remote_state
*rs
= get_remote_state ();
12688 remote_get_noisy_reply ();
12689 if (*rs
->buf
== '\0')
12690 error (_("Target does not support this command."));
12691 if (strcmp (rs
->buf
, "OK") != 0)
12692 error (_("Bogus reply from target: %s"), rs
->buf
);
12696 remote_trace_find (struct target_ops
*self
,
12697 enum trace_find_type type
, int num
,
12698 CORE_ADDR addr1
, CORE_ADDR addr2
,
12701 struct remote_state
*rs
= get_remote_state ();
12702 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12704 int target_frameno
= -1, target_tracept
= -1;
12706 /* Lookups other than by absolute frame number depend on the current
12707 trace selected, so make sure it is correct on the remote end
12709 if (type
!= tfind_number
)
12710 set_remote_traceframe ();
12713 strcpy (p
, "QTFrame:");
12714 p
= strchr (p
, '\0');
12718 xsnprintf (p
, endbuf
- p
, "%x", num
);
12721 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12724 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12727 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12728 phex_nz (addr2
, 0));
12730 case tfind_outside
:
12731 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12732 phex_nz (addr2
, 0));
12735 error (_("Unknown trace find type %d"), type
);
12739 reply
= remote_get_noisy_reply ();
12740 if (*reply
== '\0')
12741 error (_("Target does not support this command."));
12743 while (reply
&& *reply
)
12748 target_frameno
= (int) strtol (p
, &reply
, 16);
12750 error (_("Unable to parse trace frame number"));
12751 /* Don't update our remote traceframe number cache on failure
12752 to select a remote traceframe. */
12753 if (target_frameno
== -1)
12758 target_tracept
= (int) strtol (p
, &reply
, 16);
12760 error (_("Unable to parse tracepoint number"));
12762 case 'O': /* "OK"? */
12763 if (reply
[1] == 'K' && reply
[2] == '\0')
12766 error (_("Bogus reply from target: %s"), reply
);
12769 error (_("Bogus reply from target: %s"), reply
);
12772 *tpp
= target_tracept
;
12774 rs
->remote_traceframe_number
= target_frameno
;
12775 return target_frameno
;
12779 remote_get_trace_state_variable_value (struct target_ops
*self
,
12780 int tsvnum
, LONGEST
*val
)
12782 struct remote_state
*rs
= get_remote_state ();
12786 set_remote_traceframe ();
12788 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12790 reply
= remote_get_noisy_reply ();
12791 if (reply
&& *reply
)
12795 unpack_varlen_hex (reply
+ 1, &uval
);
12796 *val
= (LONGEST
) uval
;
12804 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12806 struct remote_state
*rs
= get_remote_state ();
12810 strcpy (p
, "QTSave:");
12812 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12813 error (_("Remote file name too long for trace save packet"));
12814 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12817 reply
= remote_get_noisy_reply ();
12818 if (*reply
== '\0')
12819 error (_("Target does not support this command."));
12820 if (strcmp (reply
, "OK") != 0)
12821 error (_("Bogus reply from target: %s"), reply
);
12825 /* This is basically a memory transfer, but needs to be its own packet
12826 because we don't know how the target actually organizes its trace
12827 memory, plus we want to be able to ask for as much as possible, but
12828 not be unhappy if we don't get as much as we ask for. */
12831 remote_get_raw_trace_data (struct target_ops
*self
,
12832 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12834 struct remote_state
*rs
= get_remote_state ();
12840 strcpy (p
, "qTBuffer:");
12842 p
+= hexnumstr (p
, offset
);
12844 p
+= hexnumstr (p
, len
);
12848 reply
= remote_get_noisy_reply ();
12849 if (reply
&& *reply
)
12851 /* 'l' by itself means we're at the end of the buffer and
12852 there is nothing more to get. */
12856 /* Convert the reply into binary. Limit the number of bytes to
12857 convert according to our passed-in buffer size, rather than
12858 what was returned in the packet; if the target is
12859 unexpectedly generous and gives us a bigger reply than we
12860 asked for, we don't want to crash. */
12861 rslt
= hex2bin (reply
, buf
, len
);
12865 /* Something went wrong, flag as an error. */
12870 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12872 struct remote_state
*rs
= get_remote_state ();
12874 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12878 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12880 reply
= remote_get_noisy_reply ();
12881 if (*reply
== '\0')
12882 error (_("Target does not support this command."));
12883 if (strcmp (reply
, "OK") != 0)
12884 error (_("Bogus reply from target: %s"), reply
);
12887 warning (_("Target does not support disconnected tracing."));
12891 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12893 struct thread_info
*info
= find_thread_ptid (ptid
);
12895 if (info
!= NULL
&& info
->priv
!= NULL
)
12896 return get_remote_thread_info (info
)->core
;
12902 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12904 struct remote_state
*rs
= get_remote_state ();
12907 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12909 reply
= remote_get_noisy_reply ();
12910 if (*reply
== '\0')
12911 error (_("Target does not support this command."));
12912 if (strcmp (reply
, "OK") != 0)
12913 error (_("Bogus reply from target: %s"), reply
);
12916 static traceframe_info_up
12917 remote_traceframe_info (struct target_ops
*self
)
12919 gdb::optional
<gdb::char_vector
> text
12920 = target_read_stralloc (¤t_target
, TARGET_OBJECT_TRACEFRAME_INFO
,
12923 return parse_traceframe_info (text
->data ());
12928 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12929 instruction on which a fast tracepoint may be placed. Returns -1
12930 if the packet is not supported, and 0 if the minimum instruction
12931 length is unknown. */
12934 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12936 struct remote_state
*rs
= get_remote_state ();
12939 /* If we're not debugging a process yet, the IPA can't be
12941 if (!target_has_execution
)
12944 /* Make sure the remote is pointing at the right process. */
12945 set_general_process ();
12947 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12949 reply
= remote_get_noisy_reply ();
12950 if (*reply
== '\0')
12954 ULONGEST min_insn_len
;
12956 unpack_varlen_hex (reply
, &min_insn_len
);
12958 return (int) min_insn_len
;
12963 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12965 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12967 struct remote_state
*rs
= get_remote_state ();
12968 char *buf
= rs
->buf
;
12969 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12970 enum packet_result result
;
12972 gdb_assert (val
>= 0 || val
== -1);
12973 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
12974 /* Send -1 as literal "-1" to avoid host size dependency. */
12978 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
12981 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
12984 remote_get_noisy_reply ();
12985 result
= packet_ok (rs
->buf
,
12986 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
12988 if (result
!= PACKET_OK
)
12989 warning (_("Bogus reply from target: %s"), rs
->buf
);
12994 remote_set_trace_notes (struct target_ops
*self
,
12995 const char *user
, const char *notes
,
12996 const char *stop_notes
)
12998 struct remote_state
*rs
= get_remote_state ();
13000 char *buf
= rs
->buf
;
13001 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13004 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13007 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13008 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13014 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13015 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13021 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13022 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13026 /* Ensure the buffer is terminated. */
13030 reply
= remote_get_noisy_reply ();
13031 if (*reply
== '\0')
13034 if (strcmp (reply
, "OK") != 0)
13035 error (_("Bogus reply from target: %s"), reply
);
13041 remote_use_agent (struct target_ops
*self
, int use
)
13043 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13045 struct remote_state
*rs
= get_remote_state ();
13047 /* If the stub supports QAgent. */
13048 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13050 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13052 if (strcmp (rs
->buf
, "OK") == 0)
13063 remote_can_use_agent (struct target_ops
*self
)
13065 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13068 struct btrace_target_info
13070 /* The ptid of the traced thread. */
13073 /* The obtained branch trace configuration. */
13074 struct btrace_config conf
;
13077 /* Reset our idea of our target's btrace configuration. */
13080 remote_btrace_reset (void)
13082 struct remote_state
*rs
= get_remote_state ();
13084 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13087 /* Synchronize the configuration with the target. */
13090 btrace_sync_conf (const struct btrace_config
*conf
)
13092 struct packet_config
*packet
;
13093 struct remote_state
*rs
;
13094 char *buf
, *pos
, *endbuf
;
13096 rs
= get_remote_state ();
13098 endbuf
= buf
+ get_remote_packet_size ();
13100 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13101 if (packet_config_support (packet
) == PACKET_ENABLE
13102 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13105 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13109 getpkt (&buf
, &rs
->buf_size
, 0);
13111 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13113 if (buf
[0] == 'E' && buf
[1] == '.')
13114 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13116 error (_("Failed to configure the BTS buffer size."));
13119 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13122 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13123 if (packet_config_support (packet
) == PACKET_ENABLE
13124 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13127 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13131 getpkt (&buf
, &rs
->buf_size
, 0);
13133 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13135 if (buf
[0] == 'E' && buf
[1] == '.')
13136 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13138 error (_("Failed to configure the trace buffer size."));
13141 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13145 /* Read the current thread's btrace configuration from the target and
13146 store it into CONF. */
13149 btrace_read_config (struct btrace_config
*conf
)
13151 gdb::optional
<gdb::char_vector
> xml
13152 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE_CONF
, "");
13154 parse_xml_btrace_conf (conf
, xml
->data ());
13157 /* Maybe reopen target btrace. */
13160 remote_btrace_maybe_reopen (void)
13162 struct remote_state
*rs
= get_remote_state ();
13163 struct thread_info
*tp
;
13164 int btrace_target_pushed
= 0;
13167 scoped_restore_current_thread restore_thread
;
13169 ALL_NON_EXITED_THREADS (tp
)
13171 set_general_thread (tp
->ptid
);
13173 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13174 btrace_read_config (&rs
->btrace_config
);
13176 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13179 #if !defined (HAVE_LIBIPT)
13180 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13185 warning (_("Target is recording using Intel Processor Trace "
13186 "but support was disabled at compile time."));
13191 #endif /* !defined (HAVE_LIBIPT) */
13193 /* Push target, once, but before anything else happens. This way our
13194 changes to the threads will be cleaned up by unpushing the target
13195 in case btrace_read_config () throws. */
13196 if (!btrace_target_pushed
)
13198 btrace_target_pushed
= 1;
13199 record_btrace_push_target ();
13200 printf_filtered (_("Target is recording using %s.\n"),
13201 btrace_format_string (rs
->btrace_config
.format
));
13204 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13205 tp
->btrace
.target
->ptid
= tp
->ptid
;
13206 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13210 /* Enable branch tracing. */
13212 static struct btrace_target_info
*
13213 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13214 const struct btrace_config
*conf
)
13216 struct btrace_target_info
*tinfo
= NULL
;
13217 struct packet_config
*packet
= NULL
;
13218 struct remote_state
*rs
= get_remote_state ();
13219 char *buf
= rs
->buf
;
13220 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13222 switch (conf
->format
)
13224 case BTRACE_FORMAT_BTS
:
13225 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13228 case BTRACE_FORMAT_PT
:
13229 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13233 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13234 error (_("Target does not support branch tracing."));
13236 btrace_sync_conf (conf
);
13238 set_general_thread (ptid
);
13240 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13242 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13244 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13246 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13247 error (_("Could not enable branch tracing for %s: %s"),
13248 target_pid_to_str (ptid
), rs
->buf
+ 2);
13250 error (_("Could not enable branch tracing for %s."),
13251 target_pid_to_str (ptid
));
13254 tinfo
= XCNEW (struct btrace_target_info
);
13255 tinfo
->ptid
= ptid
;
13257 /* If we fail to read the configuration, we lose some information, but the
13258 tracing itself is not impacted. */
13261 btrace_read_config (&tinfo
->conf
);
13263 CATCH (err
, RETURN_MASK_ERROR
)
13265 if (err
.message
!= NULL
)
13266 warning ("%s", err
.message
);
13273 /* Disable branch tracing. */
13276 remote_disable_btrace (struct target_ops
*self
,
13277 struct btrace_target_info
*tinfo
)
13279 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13280 struct remote_state
*rs
= get_remote_state ();
13281 char *buf
= rs
->buf
;
13282 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13284 if (packet_config_support (packet
) != PACKET_ENABLE
)
13285 error (_("Target does not support branch tracing."));
13287 set_general_thread (tinfo
->ptid
);
13289 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13291 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13293 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13295 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13296 error (_("Could not disable branch tracing for %s: %s"),
13297 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13299 error (_("Could not disable branch tracing for %s."),
13300 target_pid_to_str (tinfo
->ptid
));
13306 /* Teardown branch tracing. */
13309 remote_teardown_btrace (struct target_ops
*self
,
13310 struct btrace_target_info
*tinfo
)
13312 /* We must not talk to the target during teardown. */
13316 /* Read the branch trace. */
13318 static enum btrace_error
13319 remote_read_btrace (struct target_ops
*self
,
13320 struct btrace_data
*btrace
,
13321 struct btrace_target_info
*tinfo
,
13322 enum btrace_read_type type
)
13324 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13327 if (packet_config_support (packet
) != PACKET_ENABLE
)
13328 error (_("Target does not support branch tracing."));
13330 #if !defined(HAVE_LIBEXPAT)
13331 error (_("Cannot process branch tracing result. XML parsing not supported."));
13336 case BTRACE_READ_ALL
:
13339 case BTRACE_READ_NEW
:
13342 case BTRACE_READ_DELTA
:
13346 internal_error (__FILE__
, __LINE__
,
13347 _("Bad branch tracing read type: %u."),
13348 (unsigned int) type
);
13351 gdb::optional
<gdb::char_vector
> xml
13352 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE
, annex
);
13354 return BTRACE_ERR_UNKNOWN
;
13356 parse_xml_btrace (btrace
, xml
->data ());
13358 return BTRACE_ERR_NONE
;
13361 static const struct btrace_config
*
13362 remote_btrace_conf (struct target_ops
*self
,
13363 const struct btrace_target_info
*tinfo
)
13365 return &tinfo
->conf
;
13369 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13371 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13375 /* Implementation of to_load. */
13378 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13380 generic_load (name
, from_tty
);
13383 /* Accepts an integer PID; returns a string representing a file that
13384 can be opened on the remote side to get the symbols for the child
13385 process. Returns NULL if the operation is not supported. */
13388 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13390 static gdb::optional
<gdb::char_vector
> filename
;
13391 struct inferior
*inf
;
13392 char *annex
= NULL
;
13394 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13397 inf
= find_inferior_pid (pid
);
13399 internal_error (__FILE__
, __LINE__
,
13400 _("not currently attached to process %d"), pid
);
13402 if (!inf
->fake_pid_p
)
13404 const int annex_size
= 9;
13406 annex
= (char *) alloca (annex_size
);
13407 xsnprintf (annex
, annex_size
, "%x", pid
);
13410 filename
= target_read_stralloc (¤t_target
,
13411 TARGET_OBJECT_EXEC_FILE
, annex
);
13413 return filename
? filename
->data () : nullptr;
13416 /* Implement the to_can_do_single_step target_ops method. */
13419 remote_can_do_single_step (struct target_ops
*ops
)
13421 /* We can only tell whether target supports single step or not by
13422 supported s and S vCont actions if the stub supports vContSupported
13423 feature. If the stub doesn't support vContSupported feature,
13424 we have conservatively to think target doesn't supports single
13426 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13428 struct remote_state
*rs
= get_remote_state ();
13430 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13431 remote_vcont_probe (rs
);
13433 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13439 /* Implementation of the to_execution_direction method for the remote
13442 static enum exec_direction_kind
13443 remote_execution_direction (struct target_ops
*self
)
13445 struct remote_state
*rs
= get_remote_state ();
13447 return rs
->last_resume_exec_dir
;
13450 /* Return pointer to the thread_info struct which corresponds to
13451 THREAD_HANDLE (having length HANDLE_LEN). */
13453 static struct thread_info
*
13454 remote_thread_handle_to_thread_info (struct target_ops
*ops
,
13455 const gdb_byte
*thread_handle
,
13457 struct inferior
*inf
)
13459 struct thread_info
*tp
;
13461 ALL_NON_EXITED_THREADS (tp
)
13463 remote_thread_info
*priv
= get_remote_thread_info (tp
);
13465 if (tp
->inf
== inf
&& priv
!= NULL
)
13467 if (handle_len
!= priv
->thread_handle
.size ())
13468 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13469 handle_len
, priv
->thread_handle
.size ());
13470 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
13480 init_remote_ops (void)
13482 remote_ops
.to_shortname
= "remote";
13483 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13484 remote_ops
.to_doc
=
13485 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13486 Specify the serial device it is connected to\n\
13487 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13488 remote_ops
.to_open
= remote_open
;
13489 remote_ops
.to_close
= remote_close
;
13490 remote_ops
.to_detach
= remote_detach
;
13491 remote_ops
.to_disconnect
= remote_disconnect
;
13492 remote_ops
.to_resume
= remote_resume
;
13493 remote_ops
.to_commit_resume
= remote_commit_resume
;
13494 remote_ops
.to_wait
= remote_wait
;
13495 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13496 remote_ops
.to_store_registers
= remote_store_registers
;
13497 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13498 remote_ops
.to_files_info
= remote_files_info
;
13499 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13500 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13501 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13502 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13503 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13504 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13505 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13506 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13507 remote_ops
.to_watchpoint_addr_within_range
=
13508 remote_watchpoint_addr_within_range
;
13509 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13510 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13511 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13512 remote_ops
.to_region_ok_for_hw_watchpoint
13513 = remote_region_ok_for_hw_watchpoint
;
13514 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13515 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13516 remote_ops
.to_kill
= remote_kill
;
13517 remote_ops
.to_load
= remote_load
;
13518 remote_ops
.to_mourn_inferior
= remote_mourn
;
13519 remote_ops
.to_pass_signals
= remote_pass_signals
;
13520 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13521 remote_ops
.to_program_signals
= remote_program_signals
;
13522 remote_ops
.to_thread_alive
= remote_thread_alive
;
13523 remote_ops
.to_thread_name
= remote_thread_name
;
13524 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13525 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13526 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13527 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13528 remote_ops
.to_stop
= remote_stop
;
13529 remote_ops
.to_interrupt
= remote_interrupt
;
13530 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13531 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13532 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13533 remote_ops
.to_rcmd
= remote_rcmd
;
13534 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13535 remote_ops
.to_log_command
= serial_log_command
;
13536 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13537 remote_ops
.to_stratum
= process_stratum
;
13538 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13539 remote_ops
.to_has_memory
= default_child_has_memory
;
13540 remote_ops
.to_has_stack
= default_child_has_stack
;
13541 remote_ops
.to_has_registers
= default_child_has_registers
;
13542 remote_ops
.to_has_execution
= default_child_has_execution
;
13543 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13544 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13545 remote_ops
.to_magic
= OPS_MAGIC
;
13546 remote_ops
.to_memory_map
= remote_memory_map
;
13547 remote_ops
.to_flash_erase
= remote_flash_erase
;
13548 remote_ops
.to_flash_done
= remote_flash_done
;
13549 remote_ops
.to_read_description
= remote_read_description
;
13550 remote_ops
.to_search_memory
= remote_search_memory
;
13551 remote_ops
.to_can_async_p
= remote_can_async_p
;
13552 remote_ops
.to_is_async_p
= remote_is_async_p
;
13553 remote_ops
.to_async
= remote_async
;
13554 remote_ops
.to_thread_events
= remote_thread_events
;
13555 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13556 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13557 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13558 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13559 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13560 remote_ops
.to_supports_disable_randomization
13561 = remote_supports_disable_randomization
;
13562 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13563 remote_ops
.to_fileio_open
= remote_hostio_open
;
13564 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13565 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13566 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13567 remote_ops
.to_fileio_close
= remote_hostio_close
;
13568 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13569 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13570 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13571 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13572 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13573 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13574 remote_ops
.to_trace_init
= remote_trace_init
;
13575 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13576 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13577 remote_ops
.to_download_trace_state_variable
13578 = remote_download_trace_state_variable
;
13579 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13580 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13581 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13582 remote_ops
.to_trace_start
= remote_trace_start
;
13583 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13584 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13585 remote_ops
.to_trace_stop
= remote_trace_stop
;
13586 remote_ops
.to_trace_find
= remote_trace_find
;
13587 remote_ops
.to_get_trace_state_variable_value
13588 = remote_get_trace_state_variable_value
;
13589 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13590 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13591 remote_ops
.to_upload_trace_state_variables
13592 = remote_upload_trace_state_variables
;
13593 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13594 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13595 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13596 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13597 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13598 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13599 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13600 remote_ops
.to_verify_memory
= remote_verify_memory
;
13601 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13602 remote_ops
.to_set_permissions
= remote_set_permissions
;
13603 remote_ops
.to_static_tracepoint_marker_at
13604 = remote_static_tracepoint_marker_at
;
13605 remote_ops
.to_static_tracepoint_markers_by_strid
13606 = remote_static_tracepoint_markers_by_strid
;
13607 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13608 remote_ops
.to_use_agent
= remote_use_agent
;
13609 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13610 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13611 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13612 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13613 remote_ops
.to_read_btrace
= remote_read_btrace
;
13614 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13615 remote_ops
.to_augmented_libraries_svr4_read
=
13616 remote_augmented_libraries_svr4_read
;
13617 remote_ops
.to_follow_fork
= remote_follow_fork
;
13618 remote_ops
.to_follow_exec
= remote_follow_exec
;
13619 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13620 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13621 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13622 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13623 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13624 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13625 remote_ops
.to_execution_direction
= remote_execution_direction
;
13626 remote_ops
.to_thread_handle_to_thread_info
=
13627 remote_thread_handle_to_thread_info
;
13630 /* Set up the extended remote vector by making a copy of the standard
13631 remote vector and adding to it. */
13634 init_extended_remote_ops (void)
13636 extended_remote_ops
= remote_ops
;
13638 extended_remote_ops
.to_shortname
= "extended-remote";
13639 extended_remote_ops
.to_longname
=
13640 "Extended remote serial target in gdb-specific protocol";
13641 extended_remote_ops
.to_doc
=
13642 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13643 Specify the serial device it is connected to (e.g. /dev/ttya).";
13644 extended_remote_ops
.to_open
= extended_remote_open
;
13645 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13646 extended_remote_ops
.to_detach
= extended_remote_detach
;
13647 extended_remote_ops
.to_attach
= extended_remote_attach
;
13648 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13649 extended_remote_ops
.to_supports_disable_randomization
13650 = extended_remote_supports_disable_randomization
;
13654 remote_can_async_p (struct target_ops
*ops
)
13656 struct remote_state
*rs
= get_remote_state ();
13658 /* We don't go async if the user has explicitly prevented it with the
13659 "maint set target-async" command. */
13660 if (!target_async_permitted
)
13663 /* We're async whenever the serial device is. */
13664 return serial_can_async_p (rs
->remote_desc
);
13668 remote_is_async_p (struct target_ops
*ops
)
13670 struct remote_state
*rs
= get_remote_state ();
13672 if (!target_async_permitted
)
13673 /* We only enable async when the user specifically asks for it. */
13676 /* We're async whenever the serial device is. */
13677 return serial_is_async_p (rs
->remote_desc
);
13680 /* Pass the SERIAL event on and up to the client. One day this code
13681 will be able to delay notifying the client of an event until the
13682 point where an entire packet has been received. */
13684 static serial_event_ftype remote_async_serial_handler
;
13687 remote_async_serial_handler (struct serial
*scb
, void *context
)
13689 /* Don't propogate error information up to the client. Instead let
13690 the client find out about the error by querying the target. */
13691 inferior_event_handler (INF_REG_EVENT
, NULL
);
13695 remote_async_inferior_event_handler (gdb_client_data data
)
13697 inferior_event_handler (INF_REG_EVENT
, NULL
);
13701 remote_async (struct target_ops
*ops
, int enable
)
13703 struct remote_state
*rs
= get_remote_state ();
13707 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13709 /* If there are pending events in the stop reply queue tell the
13710 event loop to process them. */
13711 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13712 mark_async_event_handler (remote_async_inferior_event_token
);
13713 /* For simplicity, below we clear the pending events token
13714 without remembering whether it is marked, so here we always
13715 mark it. If there's actually no pending notification to
13716 process, this ends up being a no-op (other than a spurious
13717 event-loop wakeup). */
13718 if (target_is_non_stop_p ())
13719 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13723 serial_async (rs
->remote_desc
, NULL
, NULL
);
13724 /* If the core is disabling async, it doesn't want to be
13725 disturbed with target events. Clear all async event sources
13727 clear_async_event_handler (remote_async_inferior_event_token
);
13728 if (target_is_non_stop_p ())
13729 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13733 /* Implementation of the to_thread_events method. */
13736 remote_thread_events (struct target_ops
*ops
, int enable
)
13738 struct remote_state
*rs
= get_remote_state ();
13739 size_t size
= get_remote_packet_size ();
13741 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13744 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13746 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13748 switch (packet_ok (rs
->buf
,
13749 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13752 if (strcmp (rs
->buf
, "OK") != 0)
13753 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13756 warning (_("Remote failure reply: %s"), rs
->buf
);
13758 case PACKET_UNKNOWN
:
13764 set_remote_cmd (const char *args
, int from_tty
)
13766 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13770 show_remote_cmd (const char *args
, int from_tty
)
13772 /* We can't just use cmd_show_list here, because we want to skip
13773 the redundant "show remote Z-packet" and the legacy aliases. */
13774 struct cmd_list_element
*list
= remote_show_cmdlist
;
13775 struct ui_out
*uiout
= current_uiout
;
13777 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
13778 for (; list
!= NULL
; list
= list
->next
)
13779 if (strcmp (list
->name
, "Z-packet") == 0)
13781 else if (list
->type
== not_set_cmd
)
13782 /* Alias commands are exactly like the original, except they
13783 don't have the normal type. */
13787 ui_out_emit_tuple
option_emitter (uiout
, "option");
13789 uiout
->field_string ("name", list
->name
);
13790 uiout
->text (": ");
13791 if (list
->type
== show_cmd
)
13792 do_show_command (NULL
, from_tty
, list
);
13794 cmd_func (list
, NULL
, from_tty
);
13799 /* Function to be called whenever a new objfile (shlib) is detected. */
13801 remote_new_objfile (struct objfile
*objfile
)
13803 struct remote_state
*rs
= get_remote_state ();
13805 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13806 remote_check_symbols ();
13809 /* Pull all the tracepoints defined on the target and create local
13810 data structures representing them. We don't want to create real
13811 tracepoints yet, we don't want to mess up the user's existing
13815 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13817 struct remote_state
*rs
= get_remote_state ();
13820 /* Ask for a first packet of tracepoint definition. */
13822 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13824 while (*p
&& *p
!= 'l')
13826 parse_tracepoint_definition (p
, utpp
);
13827 /* Ask for another packet of tracepoint definition. */
13829 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13836 remote_upload_trace_state_variables (struct target_ops
*self
,
13837 struct uploaded_tsv
**utsvp
)
13839 struct remote_state
*rs
= get_remote_state ();
13842 /* Ask for a first packet of variable definition. */
13844 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13846 while (*p
&& *p
!= 'l')
13848 parse_tsv_definition (p
, utsvp
);
13849 /* Ask for another packet of variable definition. */
13851 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13857 /* The "set/show range-stepping" show hook. */
13860 show_range_stepping (struct ui_file
*file
, int from_tty
,
13861 struct cmd_list_element
*c
,
13864 fprintf_filtered (file
,
13865 _("Debugger's willingness to use range stepping "
13866 "is %s.\n"), value
);
13869 /* The "set/show range-stepping" set hook. */
13872 set_range_stepping (const char *ignore_args
, int from_tty
,
13873 struct cmd_list_element
*c
)
13875 struct remote_state
*rs
= get_remote_state ();
13877 /* Whene enabling, check whether range stepping is actually
13878 supported by the target, and warn if not. */
13879 if (use_range_stepping
)
13881 if (rs
->remote_desc
!= NULL
)
13883 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13884 remote_vcont_probe (rs
);
13886 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13887 && rs
->supports_vCont
.r
)
13891 warning (_("Range stepping is not supported by the current target"));
13896 _initialize_remote (void)
13898 struct cmd_list_element
*cmd
;
13899 const char *cmd_name
;
13901 /* architecture specific data */
13902 remote_gdbarch_data_handle
=
13903 gdbarch_data_register_post_init (init_remote_state
);
13904 remote_g_packet_data_handle
=
13905 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13908 = register_program_space_data_with_cleanup (NULL
,
13909 remote_pspace_data_cleanup
);
13911 /* Initialize the per-target state. At the moment there is only one
13912 of these, not one per target. Only one target is active at a
13914 remote_state
= new_remote_state ();
13916 init_remote_ops ();
13917 add_target (&remote_ops
);
13919 init_extended_remote_ops ();
13920 add_target (&extended_remote_ops
);
13922 /* Hook into new objfile notification. */
13923 gdb::observers::new_objfile
.attach (remote_new_objfile
);
13924 /* We're no longer interested in notification events of an inferior
13926 gdb::observers::inferior_exit
.attach (discard_pending_stop_replies
);
13929 init_remote_threadtests ();
13932 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13933 /* set/show remote ... */
13935 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13936 Remote protocol specific variables\n\
13937 Configure various remote-protocol specific variables such as\n\
13938 the packets being used"),
13939 &remote_set_cmdlist
, "set remote ",
13940 0 /* allow-unknown */, &setlist
);
13941 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
13942 Remote protocol specific variables\n\
13943 Configure various remote-protocol specific variables such as\n\
13944 the packets being used"),
13945 &remote_show_cmdlist
, "show remote ",
13946 0 /* allow-unknown */, &showlist
);
13948 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
13949 Compare section data on target to the exec file.\n\
13950 Argument is a single section name (default: all loaded sections).\n\
13951 To compare only read-only loaded sections, specify the -r option."),
13954 add_cmd ("packet", class_maintenance
, packet_command
, _("\
13955 Send an arbitrary packet to a remote target.\n\
13956 maintenance packet TEXT\n\
13957 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13958 this command sends the string TEXT to the inferior, and displays the\n\
13959 response packet. GDB supplies the initial `$' character, and the\n\
13960 terminating `#' character and checksum."),
13963 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
13964 Set whether to send break if interrupted."), _("\
13965 Show whether to send break if interrupted."), _("\
13966 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13967 set_remotebreak
, show_remotebreak
,
13968 &setlist
, &showlist
);
13969 cmd_name
= "remotebreak";
13970 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
13971 deprecate_cmd (cmd
, "set remote interrupt-sequence");
13972 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
13973 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
13974 deprecate_cmd (cmd
, "show remote interrupt-sequence");
13976 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
13977 interrupt_sequence_modes
, &interrupt_sequence_mode
,
13979 Set interrupt sequence to remote target."), _("\
13980 Show interrupt sequence to remote target."), _("\
13981 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
13982 NULL
, show_interrupt_sequence
,
13983 &remote_set_cmdlist
,
13984 &remote_show_cmdlist
);
13986 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
13987 &interrupt_on_connect
, _("\
13988 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13989 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13990 If set, interrupt sequence is sent to remote target."),
13992 &remote_set_cmdlist
, &remote_show_cmdlist
);
13994 /* Install commands for configuring memory read/write packets. */
13996 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
13997 Set the maximum number of bytes per memory write packet (deprecated)."),
13999 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14000 Show the maximum number of bytes per memory write packet (deprecated)."),
14002 add_cmd ("memory-write-packet-size", no_class
,
14003 set_memory_write_packet_size
, _("\
14004 Set the maximum number of bytes per memory-write packet.\n\
14005 Specify the number of bytes in a packet or 0 (zero) for the\n\
14006 default packet size. The actual limit is further reduced\n\
14007 dependent on the target. Specify ``fixed'' to disable the\n\
14008 further restriction and ``limit'' to enable that restriction."),
14009 &remote_set_cmdlist
);
14010 add_cmd ("memory-read-packet-size", no_class
,
14011 set_memory_read_packet_size
, _("\
14012 Set the maximum number of bytes per memory-read packet.\n\
14013 Specify the number of bytes in a packet or 0 (zero) for the\n\
14014 default packet size. The actual limit is further reduced\n\
14015 dependent on the target. Specify ``fixed'' to disable the\n\
14016 further restriction and ``limit'' to enable that restriction."),
14017 &remote_set_cmdlist
);
14018 add_cmd ("memory-write-packet-size", no_class
,
14019 show_memory_write_packet_size
,
14020 _("Show the maximum number of bytes per memory-write packet."),
14021 &remote_show_cmdlist
);
14022 add_cmd ("memory-read-packet-size", no_class
,
14023 show_memory_read_packet_size
,
14024 _("Show the maximum number of bytes per memory-read packet."),
14025 &remote_show_cmdlist
);
14027 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14028 &remote_hw_watchpoint_limit
, _("\
14029 Set the maximum number of target hardware watchpoints."), _("\
14030 Show the maximum number of target hardware watchpoints."), _("\
14031 Specify a negative limit for unlimited."),
14032 NULL
, NULL
, /* FIXME: i18n: The maximum
14033 number of target hardware
14034 watchpoints is %s. */
14035 &remote_set_cmdlist
, &remote_show_cmdlist
);
14036 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14037 &remote_hw_watchpoint_length_limit
, _("\
14038 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14039 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14040 Specify a negative limit for unlimited."),
14041 NULL
, NULL
, /* FIXME: i18n: The maximum
14042 length (in bytes) of a target
14043 hardware watchpoint is %s. */
14044 &remote_set_cmdlist
, &remote_show_cmdlist
);
14045 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14046 &remote_hw_breakpoint_limit
, _("\
14047 Set the maximum number of target hardware breakpoints."), _("\
14048 Show the maximum number of target hardware breakpoints."), _("\
14049 Specify a negative limit for unlimited."),
14050 NULL
, NULL
, /* FIXME: i18n: The maximum
14051 number of target hardware
14052 breakpoints is %s. */
14053 &remote_set_cmdlist
, &remote_show_cmdlist
);
14055 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14056 &remote_address_size
, _("\
14057 Set the maximum size of the address (in bits) in a memory packet."), _("\
14058 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14060 NULL
, /* FIXME: i18n: */
14061 &setlist
, &showlist
);
14063 init_all_packet_configs ();
14065 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14066 "X", "binary-download", 1);
14068 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14069 "vCont", "verbose-resume", 0);
14071 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14072 "QPassSignals", "pass-signals", 0);
14074 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14075 "QCatchSyscalls", "catch-syscalls", 0);
14077 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14078 "QProgramSignals", "program-signals", 0);
14080 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14081 "QSetWorkingDir", "set-working-dir", 0);
14083 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14084 "QStartupWithShell", "startup-with-shell", 0);
14086 add_packet_config_cmd (&remote_protocol_packets
14087 [PACKET_QEnvironmentHexEncoded
],
14088 "QEnvironmentHexEncoded", "environment-hex-encoded",
14091 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14092 "QEnvironmentReset", "environment-reset",
14095 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14096 "QEnvironmentUnset", "environment-unset",
14099 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14100 "qSymbol", "symbol-lookup", 0);
14102 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14103 "P", "set-register", 1);
14105 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14106 "p", "fetch-register", 1);
14108 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14109 "Z0", "software-breakpoint", 0);
14111 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14112 "Z1", "hardware-breakpoint", 0);
14114 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14115 "Z2", "write-watchpoint", 0);
14117 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14118 "Z3", "read-watchpoint", 0);
14120 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14121 "Z4", "access-watchpoint", 0);
14123 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14124 "qXfer:auxv:read", "read-aux-vector", 0);
14126 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14127 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14129 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14130 "qXfer:features:read", "target-features", 0);
14132 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14133 "qXfer:libraries:read", "library-info", 0);
14135 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14136 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14138 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14139 "qXfer:memory-map:read", "memory-map", 0);
14141 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14142 "qXfer:spu:read", "read-spu-object", 0);
14144 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14145 "qXfer:spu:write", "write-spu-object", 0);
14147 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14148 "qXfer:osdata:read", "osdata", 0);
14150 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14151 "qXfer:threads:read", "threads", 0);
14153 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14154 "qXfer:siginfo:read", "read-siginfo-object", 0);
14156 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14157 "qXfer:siginfo:write", "write-siginfo-object", 0);
14159 add_packet_config_cmd
14160 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14161 "qXfer:traceframe-info:read", "traceframe-info", 0);
14163 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14164 "qXfer:uib:read", "unwind-info-block", 0);
14166 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14167 "qGetTLSAddr", "get-thread-local-storage-address",
14170 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14171 "qGetTIBAddr", "get-thread-information-block-address",
14174 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14175 "bc", "reverse-continue", 0);
14177 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14178 "bs", "reverse-step", 0);
14180 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14181 "qSupported", "supported-packets", 0);
14183 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14184 "qSearch:memory", "search-memory", 0);
14186 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14187 "qTStatus", "trace-status", 0);
14189 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14190 "vFile:setfs", "hostio-setfs", 0);
14192 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14193 "vFile:open", "hostio-open", 0);
14195 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14196 "vFile:pread", "hostio-pread", 0);
14198 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14199 "vFile:pwrite", "hostio-pwrite", 0);
14201 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14202 "vFile:close", "hostio-close", 0);
14204 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14205 "vFile:unlink", "hostio-unlink", 0);
14207 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14208 "vFile:readlink", "hostio-readlink", 0);
14210 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14211 "vFile:fstat", "hostio-fstat", 0);
14213 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14214 "vAttach", "attach", 0);
14216 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14219 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14220 "QStartNoAckMode", "noack", 0);
14222 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14223 "vKill", "kill", 0);
14225 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14226 "qAttached", "query-attached", 0);
14228 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14229 "ConditionalTracepoints",
14230 "conditional-tracepoints", 0);
14232 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14233 "ConditionalBreakpoints",
14234 "conditional-breakpoints", 0);
14236 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14237 "BreakpointCommands",
14238 "breakpoint-commands", 0);
14240 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14241 "FastTracepoints", "fast-tracepoints", 0);
14243 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14244 "TracepointSource", "TracepointSource", 0);
14246 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14247 "QAllow", "allow", 0);
14249 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14250 "StaticTracepoints", "static-tracepoints", 0);
14252 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14253 "InstallInTrace", "install-in-trace", 0);
14255 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14256 "qXfer:statictrace:read", "read-sdata-object", 0);
14258 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14259 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14261 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14262 "QDisableRandomization", "disable-randomization", 0);
14264 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14265 "QAgent", "agent", 0);
14267 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14268 "QTBuffer:size", "trace-buffer-size", 0);
14270 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14271 "Qbtrace:off", "disable-btrace", 0);
14273 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14274 "Qbtrace:bts", "enable-btrace-bts", 0);
14276 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14277 "Qbtrace:pt", "enable-btrace-pt", 0);
14279 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14280 "qXfer:btrace", "read-btrace", 0);
14282 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14283 "qXfer:btrace-conf", "read-btrace-conf", 0);
14285 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14286 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14288 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14289 "multiprocess-feature", "multiprocess-feature", 0);
14291 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14292 "swbreak-feature", "swbreak-feature", 0);
14294 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14295 "hwbreak-feature", "hwbreak-feature", 0);
14297 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14298 "fork-event-feature", "fork-event-feature", 0);
14300 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14301 "vfork-event-feature", "vfork-event-feature", 0);
14303 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14304 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14306 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14307 "vContSupported", "verbose-resume-supported", 0);
14309 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14310 "exec-event-feature", "exec-event-feature", 0);
14312 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14313 "vCtrlC", "ctrl-c", 0);
14315 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14316 "QThreadEvents", "thread-events", 0);
14318 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14319 "N stop reply", "no-resumed-stop-reply", 0);
14321 /* Assert that we've registered "set remote foo-packet" commands
14322 for all packet configs. */
14326 for (i
= 0; i
< PACKET_MAX
; i
++)
14328 /* Ideally all configs would have a command associated. Some
14329 still don't though. */
14334 case PACKET_QNonStop
:
14335 case PACKET_EnableDisableTracepoints_feature
:
14336 case PACKET_tracenz_feature
:
14337 case PACKET_DisconnectedTracing_feature
:
14338 case PACKET_augmented_libraries_svr4_read_feature
:
14340 /* Additions to this list need to be well justified:
14341 pre-existing packets are OK; new packets are not. */
14349 /* This catches both forgetting to add a config command, and
14350 forgetting to remove a packet from the exception list. */
14351 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14355 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14356 Z sub-packet has its own set and show commands, but users may
14357 have sets to this variable in their .gdbinit files (or in their
14359 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14360 &remote_Z_packet_detect
, _("\
14361 Set use of remote protocol `Z' packets"), _("\
14362 Show use of remote protocol `Z' packets "), _("\
14363 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14365 set_remote_protocol_Z_packet_cmd
,
14366 show_remote_protocol_Z_packet_cmd
,
14367 /* FIXME: i18n: Use of remote protocol
14368 `Z' packets is %s. */
14369 &remote_set_cmdlist
, &remote_show_cmdlist
);
14371 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14372 Manipulate files on the remote system\n\
14373 Transfer files to and from the remote target system."),
14374 &remote_cmdlist
, "remote ",
14375 0 /* allow-unknown */, &cmdlist
);
14377 add_cmd ("put", class_files
, remote_put_command
,
14378 _("Copy a local file to the remote system."),
14381 add_cmd ("get", class_files
, remote_get_command
,
14382 _("Copy a remote file to the local system."),
14385 add_cmd ("delete", class_files
, remote_delete_command
,
14386 _("Delete a remote file."),
14389 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14390 &remote_exec_file_var
, _("\
14391 Set the remote pathname for \"run\""), _("\
14392 Show the remote pathname for \"run\""), NULL
,
14393 set_remote_exec_file
,
14394 show_remote_exec_file
,
14395 &remote_set_cmdlist
,
14396 &remote_show_cmdlist
);
14398 add_setshow_boolean_cmd ("range-stepping", class_run
,
14399 &use_range_stepping
, _("\
14400 Enable or disable range stepping."), _("\
14401 Show whether target-assisted range stepping is enabled."), _("\
14402 If on, and the target supports it, when stepping a source line, GDB\n\
14403 tells the target to step the corresponding range of addresses itself instead\n\
14404 of issuing multiple single-steps. This speeds up source level\n\
14405 stepping. If off, GDB always issues single-steps, even if range\n\
14406 stepping is supported by the target. The default is on."),
14407 set_range_stepping
,
14408 show_range_stepping
,
14412 /* Eventually initialize fileio. See fileio.c */
14413 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14415 /* Take advantage of the fact that the TID field is not used, to tag
14416 special ptids with it set to != 0. */
14417 magic_null_ptid
= ptid_build (42000, -1, 1);
14418 not_sent_ptid
= ptid_build (42000, -2, 1);
14419 any_thread_ptid
= ptid_build (42000, 0, 1);