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::unique_xmalloc_ptr
<char> xml
3155 = target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3157 if (xml
!= NULL
&& *xml
!= '\0')
3159 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3160 threads_elements
, xml
.get (), 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 VEC(static_tracepoint_marker_p
) *
3411 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3414 struct remote_state
*rs
= get_remote_state ();
3415 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
3416 struct static_tracepoint_marker
*marker
= NULL
;
3417 struct cleanup
*old_chain
;
3420 /* Ask for a first packet of static tracepoint marker
3423 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3426 error (_("Remote failure reply: %s"), p
);
3428 old_chain
= make_cleanup (free_current_marker
, &marker
);
3433 marker
= XCNEW (struct static_tracepoint_marker
);
3437 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3439 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
3441 VEC_safe_push (static_tracepoint_marker_p
,
3447 release_static_tracepoint_marker (marker
);
3448 memset (marker
, 0, sizeof (*marker
));
3451 while (*p
++ == ','); /* comma-separated list */
3452 /* Ask for another packet of static tracepoint definition. */
3454 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3458 do_cleanups (old_chain
);
3463 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3466 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3468 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3472 /* Restart the remote side; this is an extended protocol operation. */
3475 extended_remote_restart (void)
3477 struct remote_state
*rs
= get_remote_state ();
3479 /* Send the restart command; for reasons I don't understand the
3480 remote side really expects a number after the "R". */
3481 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3484 remote_fileio_reset ();
3487 /* Clean up connection to a remote debugger. */
3490 remote_close (struct target_ops
*self
)
3492 struct remote_state
*rs
= get_remote_state ();
3494 if (rs
->remote_desc
== NULL
)
3495 return; /* already closed */
3497 /* Make sure we leave stdin registered in the event loop. */
3498 remote_terminal_ours (self
);
3500 serial_close (rs
->remote_desc
);
3501 rs
->remote_desc
= NULL
;
3503 /* We don't have a connection to the remote stub anymore. Get rid
3504 of all the inferiors and their threads we were controlling.
3505 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3506 will be unable to find the thread corresponding to (pid, 0, 0). */
3507 inferior_ptid
= null_ptid
;
3508 discard_all_inferiors ();
3510 /* We are closing the remote target, so we should discard
3511 everything of this target. */
3512 discard_pending_stop_replies_in_queue (rs
);
3514 if (remote_async_inferior_event_token
)
3515 delete_async_event_handler (&remote_async_inferior_event_token
);
3517 remote_notif_state_xfree (rs
->notif_state
);
3519 trace_reset_local_state ();
3522 /* Query the remote side for the text, data and bss offsets. */
3527 struct remote_state
*rs
= get_remote_state ();
3530 int lose
, num_segments
= 0, do_sections
, do_segments
;
3531 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3532 struct section_offsets
*offs
;
3533 struct symfile_segment_data
*data
;
3535 if (symfile_objfile
== NULL
)
3538 putpkt ("qOffsets");
3539 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3542 if (buf
[0] == '\000')
3543 return; /* Return silently. Stub doesn't support
3547 warning (_("Remote failure reply: %s"), buf
);
3551 /* Pick up each field in turn. This used to be done with scanf, but
3552 scanf will make trouble if CORE_ADDR size doesn't match
3553 conversion directives correctly. The following code will work
3554 with any size of CORE_ADDR. */
3555 text_addr
= data_addr
= bss_addr
= 0;
3559 if (startswith (ptr
, "Text="))
3562 /* Don't use strtol, could lose on big values. */
3563 while (*ptr
&& *ptr
!= ';')
3564 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3566 if (startswith (ptr
, ";Data="))
3569 while (*ptr
&& *ptr
!= ';')
3570 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3575 if (!lose
&& startswith (ptr
, ";Bss="))
3578 while (*ptr
&& *ptr
!= ';')
3579 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3581 if (bss_addr
!= data_addr
)
3582 warning (_("Target reported unsupported offsets: %s"), buf
);
3587 else if (startswith (ptr
, "TextSeg="))
3590 /* Don't use strtol, could lose on big values. */
3591 while (*ptr
&& *ptr
!= ';')
3592 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3595 if (startswith (ptr
, ";DataSeg="))
3598 while (*ptr
&& *ptr
!= ';')
3599 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3607 error (_("Malformed response to offset query, %s"), buf
);
3608 else if (*ptr
!= '\0')
3609 warning (_("Target reported unsupported offsets: %s"), buf
);
3611 offs
= ((struct section_offsets
*)
3612 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3613 memcpy (offs
, symfile_objfile
->section_offsets
,
3614 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3616 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3617 do_segments
= (data
!= NULL
);
3618 do_sections
= num_segments
== 0;
3620 if (num_segments
> 0)
3622 segments
[0] = text_addr
;
3623 segments
[1] = data_addr
;
3625 /* If we have two segments, we can still try to relocate everything
3626 by assuming that the .text and .data offsets apply to the whole
3627 text and data segments. Convert the offsets given in the packet
3628 to base addresses for symfile_map_offsets_to_segments. */
3629 else if (data
&& data
->num_segments
== 2)
3631 segments
[0] = data
->segment_bases
[0] + text_addr
;
3632 segments
[1] = data
->segment_bases
[1] + data_addr
;
3635 /* If the object file has only one segment, assume that it is text
3636 rather than data; main programs with no writable data are rare,
3637 but programs with no code are useless. Of course the code might
3638 have ended up in the data segment... to detect that we would need
3639 the permissions here. */
3640 else if (data
&& data
->num_segments
== 1)
3642 segments
[0] = data
->segment_bases
[0] + text_addr
;
3645 /* There's no way to relocate by segment. */
3651 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3652 offs
, num_segments
, segments
);
3654 if (ret
== 0 && !do_sections
)
3655 error (_("Can not handle qOffsets TextSeg "
3656 "response with this symbol file"));
3663 free_symfile_segment_data (data
);
3667 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3669 /* This is a temporary kludge to force data and bss to use the
3670 same offsets because that's what nlmconv does now. The real
3671 solution requires changes to the stub and remote.c that I
3672 don't have time to do right now. */
3674 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3675 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3678 objfile_relocate (symfile_objfile
, offs
);
3681 /* Send interrupt_sequence to remote target. */
3683 send_interrupt_sequence (void)
3685 struct remote_state
*rs
= get_remote_state ();
3687 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3688 remote_serial_write ("\x03", 1);
3689 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3690 serial_send_break (rs
->remote_desc
);
3691 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3693 serial_send_break (rs
->remote_desc
);
3694 remote_serial_write ("g", 1);
3697 internal_error (__FILE__
, __LINE__
,
3698 _("Invalid value for interrupt_sequence_mode: %s."),
3699 interrupt_sequence_mode
);
3703 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3704 and extract the PTID. Returns NULL_PTID if not found. */
3707 stop_reply_extract_thread (char *stop_reply
)
3709 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3713 /* Txx r:val ; r:val (...) */
3716 /* Look for "register" named "thread". */
3721 p1
= strchr (p
, ':');
3725 if (strncmp (p
, "thread", p1
- p
) == 0)
3726 return read_ptid (++p1
, &p
);
3728 p1
= strchr (p
, ';');
3740 /* Determine the remote side's current thread. If we have a stop
3741 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3742 "thread" register we can extract the current thread from. If not,
3743 ask the remote which is the current thread with qC. The former
3744 method avoids a roundtrip. */
3747 get_current_thread (char *wait_status
)
3749 ptid_t ptid
= null_ptid
;
3751 /* Note we don't use remote_parse_stop_reply as that makes use of
3752 the target architecture, which we haven't yet fully determined at
3754 if (wait_status
!= NULL
)
3755 ptid
= stop_reply_extract_thread (wait_status
);
3756 if (ptid_equal (ptid
, null_ptid
))
3757 ptid
= remote_current_thread (inferior_ptid
);
3762 /* Query the remote target for which is the current thread/process,
3763 add it to our tables, and update INFERIOR_PTID. The caller is
3764 responsible for setting the state such that the remote end is ready
3765 to return the current thread.
3767 This function is called after handling the '?' or 'vRun' packets,
3768 whose response is a stop reply from which we can also try
3769 extracting the thread. If the target doesn't support the explicit
3770 qC query, we infer the current thread from that stop reply, passed
3771 in in WAIT_STATUS, which may be NULL. */
3774 add_current_inferior_and_thread (char *wait_status
)
3776 struct remote_state
*rs
= get_remote_state ();
3779 inferior_ptid
= null_ptid
;
3781 /* Now, if we have thread information, update inferior_ptid. */
3782 ptid_t curr_ptid
= get_current_thread (wait_status
);
3784 if (curr_ptid
!= null_ptid
)
3786 if (!remote_multi_process_p (rs
))
3791 /* Without this, some commands which require an active target
3792 (such as kill) won't work. This variable serves (at least)
3793 double duty as both the pid of the target process (if it has
3794 such), and as a flag indicating that a target is active. */
3795 curr_ptid
= magic_null_ptid
;
3799 remote_add_inferior (fake_pid_p
, ptid_get_pid (curr_ptid
), -1, 1);
3801 /* Add the main thread and switch to it. Don't try reading
3802 registers yet, since we haven't fetched the target description
3804 thread_info
*tp
= add_thread_silent (curr_ptid
);
3805 switch_to_thread_no_regs (tp
);
3808 /* Print info about a thread that was found already stopped on
3812 print_one_stopped_thread (struct thread_info
*thread
)
3814 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3816 switch_to_thread (thread
->ptid
);
3817 stop_pc
= get_frame_pc (get_current_frame ());
3818 set_current_sal_from_frame (get_current_frame ());
3820 thread
->suspend
.waitstatus_pending_p
= 0;
3822 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3824 enum gdb_signal sig
= ws
->value
.sig
;
3826 if (signal_print_state (sig
))
3827 gdb::observers::signal_received
.notify (sig
);
3829 gdb::observers::normal_stop
.notify (NULL
, 1);
3832 /* Process all initial stop replies the remote side sent in response
3833 to the ? packet. These indicate threads that were already stopped
3834 on initial connection. We mark these threads as stopped and print
3835 their current frame before giving the user the prompt. */
3838 process_initial_stop_replies (int from_tty
)
3840 int pending_stop_replies
= stop_reply_queue_length ();
3841 struct inferior
*inf
;
3842 struct thread_info
*thread
;
3843 struct thread_info
*selected
= NULL
;
3844 struct thread_info
*lowest_stopped
= NULL
;
3845 struct thread_info
*first
= NULL
;
3847 /* Consume the initial pending events. */
3848 while (pending_stop_replies
-- > 0)
3850 ptid_t waiton_ptid
= minus_one_ptid
;
3852 struct target_waitstatus ws
;
3853 int ignore_event
= 0;
3854 struct thread_info
*thread
;
3856 memset (&ws
, 0, sizeof (ws
));
3857 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3859 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3863 case TARGET_WAITKIND_IGNORE
:
3864 case TARGET_WAITKIND_NO_RESUMED
:
3865 case TARGET_WAITKIND_SIGNALLED
:
3866 case TARGET_WAITKIND_EXITED
:
3867 /* We shouldn't see these, but if we do, just ignore. */
3869 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3873 case TARGET_WAITKIND_EXECD
:
3874 xfree (ws
.value
.execd_pathname
);
3883 thread
= find_thread_ptid (event_ptid
);
3885 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3887 enum gdb_signal sig
= ws
.value
.sig
;
3889 /* Stubs traditionally report SIGTRAP as initial signal,
3890 instead of signal 0. Suppress it. */
3891 if (sig
== GDB_SIGNAL_TRAP
)
3893 thread
->suspend
.stop_signal
= sig
;
3897 thread
->suspend
.waitstatus
= ws
;
3899 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3900 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3901 thread
->suspend
.waitstatus_pending_p
= 1;
3903 set_executing (event_ptid
, 0);
3904 set_running (event_ptid
, 0);
3905 get_remote_thread_info (thread
)->vcont_resumed
= 0;
3908 /* "Notice" the new inferiors before anything related to
3909 registers/memory. */
3915 inf
->needs_setup
= 1;
3919 thread
= any_live_thread_of_process (inf
->pid
);
3920 notice_new_inferior (thread
->ptid
,
3921 thread
->state
== THREAD_RUNNING
,
3926 /* If all-stop on top of non-stop, pause all threads. Note this
3927 records the threads' stop pc, so must be done after "noticing"
3931 stop_all_threads ();
3933 /* If all threads of an inferior were already stopped, we
3934 haven't setup the inferior yet. */
3940 if (inf
->needs_setup
)
3942 thread
= any_live_thread_of_process (inf
->pid
);
3943 switch_to_thread_no_regs (thread
);
3949 /* Now go over all threads that are stopped, and print their current
3950 frame. If all-stop, then if there's a signalled thread, pick
3952 ALL_NON_EXITED_THREADS (thread
)
3958 set_running (thread
->ptid
, 0);
3959 else if (thread
->state
!= THREAD_STOPPED
)
3962 if (selected
== NULL
3963 && thread
->suspend
.waitstatus_pending_p
)
3966 if (lowest_stopped
== NULL
3967 || thread
->inf
->num
< lowest_stopped
->inf
->num
3968 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
3969 lowest_stopped
= thread
;
3972 print_one_stopped_thread (thread
);
3975 /* In all-stop, we only print the status of one thread, and leave
3976 others with their status pending. */
3981 thread
= lowest_stopped
;
3985 print_one_stopped_thread (thread
);
3988 /* For "info program". */
3989 thread
= inferior_thread ();
3990 if (thread
->state
== THREAD_STOPPED
)
3991 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
3994 /* Start the remote connection and sync state. */
3997 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
3999 struct remote_state
*rs
= get_remote_state ();
4000 struct packet_config
*noack_config
;
4001 char *wait_status
= NULL
;
4003 /* Signal other parts that we're going through the initial setup,
4004 and so things may not be stable yet. E.g., we don't try to
4005 install tracepoints until we've relocated symbols. Also, a
4006 Ctrl-C before we're connected and synced up can't interrupt the
4007 target. Instead, it offers to drop the (potentially wedged)
4009 rs
->starting_up
= 1;
4013 if (interrupt_on_connect
)
4014 send_interrupt_sequence ();
4016 /* Ack any packet which the remote side has already sent. */
4017 remote_serial_write ("+", 1);
4019 /* The first packet we send to the target is the optional "supported
4020 packets" request. If the target can answer this, it will tell us
4021 which later probes to skip. */
4022 remote_query_supported ();
4024 /* If the stub wants to get a QAllow, compose one and send it. */
4025 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4026 remote_set_permissions (target
);
4028 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4029 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4030 as a reply to known packet. For packet "vFile:setfs:" it is an
4031 invalid reply and GDB would return error in
4032 remote_hostio_set_filesystem, making remote files access impossible.
4033 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4034 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4036 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4038 putpkt (v_mustreplyempty
);
4039 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4040 if (strcmp (rs
->buf
, "OK") == 0)
4041 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4042 else if (strcmp (rs
->buf
, "") != 0)
4043 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4047 /* Next, we possibly activate noack mode.
4049 If the QStartNoAckMode packet configuration is set to AUTO,
4050 enable noack mode if the stub reported a wish for it with
4053 If set to TRUE, then enable noack mode even if the stub didn't
4054 report it in qSupported. If the stub doesn't reply OK, the
4055 session ends with an error.
4057 If FALSE, then don't activate noack mode, regardless of what the
4058 stub claimed should be the default with qSupported. */
4060 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4061 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4063 putpkt ("QStartNoAckMode");
4064 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4065 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4071 /* Tell the remote that we are using the extended protocol. */
4073 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4076 /* Let the target know which signals it is allowed to pass down to
4078 update_signals_program_target ();
4080 /* Next, if the target can specify a description, read it. We do
4081 this before anything involving memory or registers. */
4082 target_find_description ();
4084 /* Next, now that we know something about the target, update the
4085 address spaces in the program spaces. */
4086 update_address_spaces ();
4088 /* On OSs where the list of libraries is global to all
4089 processes, we fetch them early. */
4090 if (gdbarch_has_global_solist (target_gdbarch ()))
4091 solib_add (NULL
, from_tty
, auto_solib_add
);
4093 if (target_is_non_stop_p ())
4095 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4096 error (_("Non-stop mode requested, but remote "
4097 "does not support non-stop"));
4099 putpkt ("QNonStop:1");
4100 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4102 if (strcmp (rs
->buf
, "OK") != 0)
4103 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4105 /* Find about threads and processes the stub is already
4106 controlling. We default to adding them in the running state.
4107 The '?' query below will then tell us about which threads are
4109 remote_update_thread_list (target
);
4111 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4113 /* Don't assume that the stub can operate in all-stop mode.
4114 Request it explicitly. */
4115 putpkt ("QNonStop:0");
4116 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4118 if (strcmp (rs
->buf
, "OK") != 0)
4119 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4122 /* Upload TSVs regardless of whether the target is running or not. The
4123 remote stub, such as GDBserver, may have some predefined or builtin
4124 TSVs, even if the target is not running. */
4125 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4127 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4129 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4130 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4133 /* Check whether the target is running now. */
4135 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4137 if (!target_is_non_stop_p ())
4139 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4142 error (_("The target is not running (try extended-remote?)"));
4144 /* We're connected, but not running. Drop out before we
4145 call start_remote. */
4146 rs
->starting_up
= 0;
4151 /* Save the reply for later. */
4152 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4153 strcpy (wait_status
, rs
->buf
);
4156 /* Fetch thread list. */
4157 target_update_thread_list ();
4159 /* Let the stub know that we want it to return the thread. */
4160 set_continue_thread (minus_one_ptid
);
4162 if (thread_count () == 0)
4164 /* Target has no concept of threads at all. GDB treats
4165 non-threaded target as single-threaded; add a main
4167 add_current_inferior_and_thread (wait_status
);
4171 /* We have thread information; select the thread the target
4172 says should be current. If we're reconnecting to a
4173 multi-threaded program, this will ideally be the thread
4174 that last reported an event before GDB disconnected. */
4175 inferior_ptid
= get_current_thread (wait_status
);
4176 if (ptid_equal (inferior_ptid
, null_ptid
))
4178 /* Odd... The target was able to list threads, but not
4179 tell us which thread was current (no "thread"
4180 register in T stop reply?). Just pick the first
4181 thread in the thread list then. */
4184 fprintf_unfiltered (gdb_stdlog
,
4185 "warning: couldn't determine remote "
4186 "current thread; picking first in list.\n");
4188 inferior_ptid
= thread_list
->ptid
;
4192 /* init_wait_for_inferior should be called before get_offsets in order
4193 to manage `inserted' flag in bp loc in a correct state.
4194 breakpoint_init_inferior, called from init_wait_for_inferior, set
4195 `inserted' flag to 0, while before breakpoint_re_set, called from
4196 start_remote, set `inserted' flag to 1. In the initialization of
4197 inferior, breakpoint_init_inferior should be called first, and then
4198 breakpoint_re_set can be called. If this order is broken, state of
4199 `inserted' flag is wrong, and cause some problems on breakpoint
4201 init_wait_for_inferior ();
4203 get_offsets (); /* Get text, data & bss offsets. */
4205 /* If we could not find a description using qXfer, and we know
4206 how to do it some other way, try again. This is not
4207 supported for non-stop; it could be, but it is tricky if
4208 there are no stopped threads when we connect. */
4209 if (remote_read_description_p (target
)
4210 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4212 target_clear_description ();
4213 target_find_description ();
4216 /* Use the previously fetched status. */
4217 gdb_assert (wait_status
!= NULL
);
4218 strcpy (rs
->buf
, wait_status
);
4219 rs
->cached_wait_status
= 1;
4221 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4225 /* Clear WFI global state. Do this before finding about new
4226 threads and inferiors, and setting the current inferior.
4227 Otherwise we would clear the proceed status of the current
4228 inferior when we want its stop_soon state to be preserved
4229 (see notice_new_inferior). */
4230 init_wait_for_inferior ();
4232 /* In non-stop, we will either get an "OK", meaning that there
4233 are no stopped threads at this time; or, a regular stop
4234 reply. In the latter case, there may be more than one thread
4235 stopped --- we pull them all out using the vStopped
4237 if (strcmp (rs
->buf
, "OK") != 0)
4239 struct notif_client
*notif
= ¬if_client_stop
;
4241 /* remote_notif_get_pending_replies acks this one, and gets
4243 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4244 = remote_notif_parse (notif
, rs
->buf
);
4245 remote_notif_get_pending_events (notif
);
4248 if (thread_count () == 0)
4251 error (_("The target is not running (try extended-remote?)"));
4253 /* We're connected, but not running. Drop out before we
4254 call start_remote. */
4255 rs
->starting_up
= 0;
4259 /* In non-stop mode, any cached wait status will be stored in
4260 the stop reply queue. */
4261 gdb_assert (wait_status
== NULL
);
4263 /* Report all signals during attach/startup. */
4264 remote_pass_signals (target
, 0, NULL
);
4266 /* If there are already stopped threads, mark them stopped and
4267 report their stops before giving the prompt to the user. */
4268 process_initial_stop_replies (from_tty
);
4270 if (target_can_async_p ())
4274 /* If we connected to a live target, do some additional setup. */
4275 if (target_has_execution
)
4277 if (symfile_objfile
) /* No use without a symbol-file. */
4278 remote_check_symbols ();
4281 /* Possibly the target has been engaged in a trace run started
4282 previously; find out where things are at. */
4283 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4285 struct uploaded_tp
*uploaded_tps
= NULL
;
4287 if (current_trace_status ()->running
)
4288 printf_filtered (_("Trace is already running on the target.\n"));
4290 remote_upload_tracepoints (target
, &uploaded_tps
);
4292 merge_uploaded_tracepoints (&uploaded_tps
);
4295 /* Possibly the target has been engaged in a btrace record started
4296 previously; find out where things are at. */
4297 remote_btrace_maybe_reopen ();
4299 /* The thread and inferior lists are now synchronized with the
4300 target, our symbols have been relocated, and we're merged the
4301 target's tracepoints with ours. We're done with basic start
4303 rs
->starting_up
= 0;
4305 /* Maybe breakpoints are global and need to be inserted now. */
4306 if (breakpoints_should_be_inserted_now ())
4307 insert_breakpoints ();
4310 /* Open a connection to a remote debugger.
4311 NAME is the filename used for communication. */
4314 remote_open (const char *name
, int from_tty
)
4316 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4319 /* Open a connection to a remote debugger using the extended
4320 remote gdb protocol. NAME is the filename used for communication. */
4323 extended_remote_open (const char *name
, int from_tty
)
4325 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4328 /* Reset all packets back to "unknown support". Called when opening a
4329 new connection to a remote target. */
4332 reset_all_packet_configs_support (void)
4336 for (i
= 0; i
< PACKET_MAX
; i
++)
4337 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4340 /* Initialize all packet configs. */
4343 init_all_packet_configs (void)
4347 for (i
= 0; i
< PACKET_MAX
; i
++)
4349 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4350 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4354 /* Symbol look-up. */
4357 remote_check_symbols (void)
4359 char *msg
, *reply
, *tmp
;
4362 struct cleanup
*old_chain
;
4364 /* The remote side has no concept of inferiors that aren't running
4365 yet, it only knows about running processes. If we're connected
4366 but our current inferior is not running, we should not invite the
4367 remote target to request symbol lookups related to its
4368 (unrelated) current process. */
4369 if (!target_has_execution
)
4372 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4375 /* Make sure the remote is pointing at the right process. Note
4376 there's no way to select "no process". */
4377 set_general_process ();
4379 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4380 because we need both at the same time. */
4381 msg
= (char *) xmalloc (get_remote_packet_size ());
4382 old_chain
= make_cleanup (xfree
, msg
);
4383 reply
= (char *) xmalloc (get_remote_packet_size ());
4384 make_cleanup (free_current_contents
, &reply
);
4385 reply_size
= get_remote_packet_size ();
4387 /* Invite target to request symbol lookups. */
4389 putpkt ("qSymbol::");
4390 getpkt (&reply
, &reply_size
, 0);
4391 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4393 while (startswith (reply
, "qSymbol:"))
4395 struct bound_minimal_symbol sym
;
4398 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4400 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4401 if (sym
.minsym
== NULL
)
4402 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4405 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4406 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4408 /* If this is a function address, return the start of code
4409 instead of any data function descriptor. */
4410 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4414 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4415 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4419 getpkt (&reply
, &reply_size
, 0);
4422 do_cleanups (old_chain
);
4425 static struct serial
*
4426 remote_serial_open (const char *name
)
4428 static int udp_warning
= 0;
4430 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4431 of in ser-tcp.c, because it is the remote protocol assuming that the
4432 serial connection is reliable and not the serial connection promising
4434 if (!udp_warning
&& startswith (name
, "udp:"))
4436 warning (_("The remote protocol may be unreliable over UDP.\n"
4437 "Some events may be lost, rendering further debugging "
4442 return serial_open (name
);
4445 /* Inform the target of our permission settings. The permission flags
4446 work without this, but if the target knows the settings, it can do
4447 a couple things. First, it can add its own check, to catch cases
4448 that somehow manage to get by the permissions checks in target
4449 methods. Second, if the target is wired to disallow particular
4450 settings (for instance, a system in the field that is not set up to
4451 be able to stop at a breakpoint), it can object to any unavailable
4455 remote_set_permissions (struct target_ops
*self
)
4457 struct remote_state
*rs
= get_remote_state ();
4459 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4460 "WriteReg:%x;WriteMem:%x;"
4461 "InsertBreak:%x;InsertTrace:%x;"
4462 "InsertFastTrace:%x;Stop:%x",
4463 may_write_registers
, may_write_memory
,
4464 may_insert_breakpoints
, may_insert_tracepoints
,
4465 may_insert_fast_tracepoints
, may_stop
);
4467 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4469 /* If the target didn't like the packet, warn the user. Do not try
4470 to undo the user's settings, that would just be maddening. */
4471 if (strcmp (rs
->buf
, "OK") != 0)
4472 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4475 /* This type describes each known response to the qSupported
4477 struct protocol_feature
4479 /* The name of this protocol feature. */
4482 /* The default for this protocol feature. */
4483 enum packet_support default_support
;
4485 /* The function to call when this feature is reported, or after
4486 qSupported processing if the feature is not supported.
4487 The first argument points to this structure. The second
4488 argument indicates whether the packet requested support be
4489 enabled, disabled, or probed (or the default, if this function
4490 is being called at the end of processing and this feature was
4491 not reported). The third argument may be NULL; if not NULL, it
4492 is a NUL-terminated string taken from the packet following
4493 this feature's name and an equals sign. */
4494 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4497 /* The corresponding packet for this feature. Only used if
4498 FUNC is remote_supported_packet. */
4503 remote_supported_packet (const struct protocol_feature
*feature
,
4504 enum packet_support support
,
4505 const char *argument
)
4509 warning (_("Remote qSupported response supplied an unexpected value for"
4510 " \"%s\"."), feature
->name
);
4514 remote_protocol_packets
[feature
->packet
].support
= support
;
4518 remote_packet_size (const struct protocol_feature
*feature
,
4519 enum packet_support support
, const char *value
)
4521 struct remote_state
*rs
= get_remote_state ();
4526 if (support
!= PACKET_ENABLE
)
4529 if (value
== NULL
|| *value
== '\0')
4531 warning (_("Remote target reported \"%s\" without a size."),
4537 packet_size
= strtol (value
, &value_end
, 16);
4538 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4540 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4541 feature
->name
, value
);
4545 /* Record the new maximum packet size. */
4546 rs
->explicit_packet_size
= packet_size
;
4549 static const struct protocol_feature remote_protocol_features
[] = {
4550 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4551 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4552 PACKET_qXfer_auxv
},
4553 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4554 PACKET_qXfer_exec_file
},
4555 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4556 PACKET_qXfer_features
},
4557 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4558 PACKET_qXfer_libraries
},
4559 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4560 PACKET_qXfer_libraries_svr4
},
4561 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4562 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4563 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4564 PACKET_qXfer_memory_map
},
4565 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4566 PACKET_qXfer_spu_read
},
4567 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4568 PACKET_qXfer_spu_write
},
4569 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4570 PACKET_qXfer_osdata
},
4571 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4572 PACKET_qXfer_threads
},
4573 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4574 PACKET_qXfer_traceframe_info
},
4575 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4576 PACKET_QPassSignals
},
4577 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4578 PACKET_QCatchSyscalls
},
4579 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4580 PACKET_QProgramSignals
},
4581 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
4582 PACKET_QSetWorkingDir
},
4583 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
4584 PACKET_QStartupWithShell
},
4585 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
4586 PACKET_QEnvironmentHexEncoded
},
4587 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
4588 PACKET_QEnvironmentReset
},
4589 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
4590 PACKET_QEnvironmentUnset
},
4591 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4592 PACKET_QStartNoAckMode
},
4593 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4594 PACKET_multiprocess_feature
},
4595 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4596 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4597 PACKET_qXfer_siginfo_read
},
4598 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4599 PACKET_qXfer_siginfo_write
},
4600 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4601 PACKET_ConditionalTracepoints
},
4602 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4603 PACKET_ConditionalBreakpoints
},
4604 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4605 PACKET_BreakpointCommands
},
4606 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4607 PACKET_FastTracepoints
},
4608 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4609 PACKET_StaticTracepoints
},
4610 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4611 PACKET_InstallInTrace
},
4612 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4613 PACKET_DisconnectedTracing_feature
},
4614 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4616 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4618 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4619 PACKET_TracepointSource
},
4620 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4622 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4623 PACKET_EnableDisableTracepoints_feature
},
4624 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4625 PACKET_qXfer_fdpic
},
4626 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4628 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4629 PACKET_QDisableRandomization
},
4630 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4631 { "QTBuffer:size", PACKET_DISABLE
,
4632 remote_supported_packet
, PACKET_QTBuffer_size
},
4633 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4634 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4635 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4636 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4637 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4638 PACKET_qXfer_btrace
},
4639 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4640 PACKET_qXfer_btrace_conf
},
4641 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4642 PACKET_Qbtrace_conf_bts_size
},
4643 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4644 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4645 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4646 PACKET_fork_event_feature
},
4647 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4648 PACKET_vfork_event_feature
},
4649 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4650 PACKET_exec_event_feature
},
4651 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4652 PACKET_Qbtrace_conf_pt_size
},
4653 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4654 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4655 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4658 static char *remote_support_xml
;
4660 /* Register string appended to "xmlRegisters=" in qSupported query. */
4663 register_remote_support_xml (const char *xml
)
4665 #if defined(HAVE_LIBEXPAT)
4666 if (remote_support_xml
== NULL
)
4667 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4670 char *copy
= xstrdup (remote_support_xml
+ 13);
4671 char *p
= strtok (copy
, ",");
4675 if (strcmp (p
, xml
) == 0)
4682 while ((p
= strtok (NULL
, ",")) != NULL
);
4685 remote_support_xml
= reconcat (remote_support_xml
,
4686 remote_support_xml
, ",", xml
,
4693 remote_query_supported_append (char *msg
, const char *append
)
4696 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4698 return xstrdup (append
);
4702 remote_query_supported (void)
4704 struct remote_state
*rs
= get_remote_state ();
4707 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4709 /* The packet support flags are handled differently for this packet
4710 than for most others. We treat an error, a disabled packet, and
4711 an empty response identically: any features which must be reported
4712 to be used will be automatically disabled. An empty buffer
4713 accomplishes this, since that is also the representation for a list
4714 containing no features. */
4717 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4720 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4722 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4723 q
= remote_query_supported_append (q
, "multiprocess+");
4725 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4726 q
= remote_query_supported_append (q
, "swbreak+");
4727 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4728 q
= remote_query_supported_append (q
, "hwbreak+");
4730 q
= remote_query_supported_append (q
, "qRelocInsn+");
4732 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4733 != AUTO_BOOLEAN_FALSE
)
4734 q
= remote_query_supported_append (q
, "fork-events+");
4735 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4736 != AUTO_BOOLEAN_FALSE
)
4737 q
= remote_query_supported_append (q
, "vfork-events+");
4738 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4739 != AUTO_BOOLEAN_FALSE
)
4740 q
= remote_query_supported_append (q
, "exec-events+");
4742 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4743 q
= remote_query_supported_append (q
, "vContSupported+");
4745 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4746 q
= remote_query_supported_append (q
, "QThreadEvents+");
4748 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4749 q
= remote_query_supported_append (q
, "no-resumed+");
4751 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4752 the qSupported:xmlRegisters=i386 handling. */
4753 if (remote_support_xml
!= NULL
4754 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
4755 q
= remote_query_supported_append (q
, remote_support_xml
);
4757 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4760 do_cleanups (old_chain
);
4762 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4764 /* If an error occured, warn, but do not return - just reset the
4765 buffer to empty and go on to disable features. */
4766 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4769 warning (_("Remote failure reply: %s"), rs
->buf
);
4774 memset (seen
, 0, sizeof (seen
));
4779 enum packet_support is_supported
;
4780 char *p
, *end
, *name_end
, *value
;
4782 /* First separate out this item from the rest of the packet. If
4783 there's another item after this, we overwrite the separator
4784 (terminated strings are much easier to work with). */
4786 end
= strchr (p
, ';');
4789 end
= p
+ strlen (p
);
4799 warning (_("empty item in \"qSupported\" response"));
4804 name_end
= strchr (p
, '=');
4807 /* This is a name=value entry. */
4808 is_supported
= PACKET_ENABLE
;
4809 value
= name_end
+ 1;
4818 is_supported
= PACKET_ENABLE
;
4822 is_supported
= PACKET_DISABLE
;
4826 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4830 warning (_("unrecognized item \"%s\" "
4831 "in \"qSupported\" response"), p
);
4837 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4838 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4840 const struct protocol_feature
*feature
;
4843 feature
= &remote_protocol_features
[i
];
4844 feature
->func (feature
, is_supported
, value
);
4849 /* If we increased the packet size, make sure to increase the global
4850 buffer size also. We delay this until after parsing the entire
4851 qSupported packet, because this is the same buffer we were
4853 if (rs
->buf_size
< rs
->explicit_packet_size
)
4855 rs
->buf_size
= rs
->explicit_packet_size
;
4856 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4859 /* Handle the defaults for unmentioned features. */
4860 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4863 const struct protocol_feature
*feature
;
4865 feature
= &remote_protocol_features
[i
];
4866 feature
->func (feature
, feature
->default_support
, NULL
);
4870 /* Serial QUIT handler for the remote serial descriptor.
4872 Defers handling a Ctrl-C until we're done with the current
4873 command/response packet sequence, unless:
4875 - We're setting up the connection. Don't send a remote interrupt
4876 request, as we're not fully synced yet. Quit immediately
4879 - The target has been resumed in the foreground
4880 (target_terminal::is_ours is false) with a synchronous resume
4881 packet, and we're blocked waiting for the stop reply, thus a
4882 Ctrl-C should be immediately sent to the target.
4884 - We get a second Ctrl-C while still within the same serial read or
4885 write. In that case the serial is seemingly wedged --- offer to
4888 - We see a second Ctrl-C without target response, after having
4889 previously interrupted the target. In that case the target/stub
4890 is probably wedged --- offer to quit/disconnect.
4894 remote_serial_quit_handler (void)
4896 struct remote_state
*rs
= get_remote_state ();
4898 if (check_quit_flag ())
4900 /* If we're starting up, we're not fully synced yet. Quit
4902 if (rs
->starting_up
)
4904 else if (rs
->got_ctrlc_during_io
)
4906 if (query (_("The target is not responding to GDB commands.\n"
4907 "Stop debugging it? ")))
4908 remote_unpush_and_throw ();
4910 /* If ^C has already been sent once, offer to disconnect. */
4911 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
4913 /* All-stop protocol, and blocked waiting for stop reply. Send
4914 an interrupt request. */
4915 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
4916 target_interrupt ();
4918 rs
->got_ctrlc_during_io
= 1;
4922 /* Remove any of the remote.c targets from target stack. Upper targets depend
4923 on it so remove them first. */
4926 remote_unpush_target (void)
4928 pop_all_targets_at_and_above (process_stratum
);
4932 remote_unpush_and_throw (void)
4934 remote_unpush_target ();
4935 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
4939 remote_open_1 (const char *name
, int from_tty
,
4940 struct target_ops
*target
, int extended_p
)
4942 struct remote_state
*rs
= get_remote_state ();
4945 error (_("To open a remote debug connection, you need to specify what\n"
4946 "serial device is attached to the remote system\n"
4947 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4949 /* See FIXME above. */
4950 if (!target_async_permitted
)
4951 wait_forever_enabled_p
= 1;
4953 /* If we're connected to a running target, target_preopen will kill it.
4954 Ask this question first, before target_preopen has a chance to kill
4956 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
4959 && !query (_("Already connected to a remote target. Disconnect? ")))
4960 error (_("Still connected."));
4963 /* Here the possibly existing remote target gets unpushed. */
4964 target_preopen (from_tty
);
4966 /* Make sure we send the passed signals list the next time we resume. */
4967 xfree (rs
->last_pass_packet
);
4968 rs
->last_pass_packet
= NULL
;
4970 /* Make sure we send the program signals list the next time we
4972 xfree (rs
->last_program_signals_packet
);
4973 rs
->last_program_signals_packet
= NULL
;
4975 remote_fileio_reset ();
4976 reopen_exec_file ();
4979 rs
->remote_desc
= remote_serial_open (name
);
4980 if (!rs
->remote_desc
)
4981 perror_with_name (name
);
4983 if (baud_rate
!= -1)
4985 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
4987 /* The requested speed could not be set. Error out to
4988 top level after closing remote_desc. Take care to
4989 set remote_desc to NULL to avoid closing remote_desc
4991 serial_close (rs
->remote_desc
);
4992 rs
->remote_desc
= NULL
;
4993 perror_with_name (name
);
4997 serial_setparity (rs
->remote_desc
, serial_parity
);
4998 serial_raw (rs
->remote_desc
);
5000 /* If there is something sitting in the buffer we might take it as a
5001 response to a command, which would be bad. */
5002 serial_flush_input (rs
->remote_desc
);
5006 puts_filtered ("Remote debugging using ");
5007 puts_filtered (name
);
5008 puts_filtered ("\n");
5010 push_target (target
); /* Switch to using remote target now. */
5012 /* Register extra event sources in the event loop. */
5013 remote_async_inferior_event_token
5014 = create_async_event_handler (remote_async_inferior_event_handler
,
5016 rs
->notif_state
= remote_notif_state_allocate ();
5018 /* Reset the target state; these things will be queried either by
5019 remote_query_supported or as they are needed. */
5020 reset_all_packet_configs_support ();
5021 rs
->cached_wait_status
= 0;
5022 rs
->explicit_packet_size
= 0;
5024 rs
->extended
= extended_p
;
5025 rs
->waiting_for_stop_reply
= 0;
5026 rs
->ctrlc_pending_p
= 0;
5027 rs
->got_ctrlc_during_io
= 0;
5029 rs
->general_thread
= not_sent_ptid
;
5030 rs
->continue_thread
= not_sent_ptid
;
5031 rs
->remote_traceframe_number
= -1;
5033 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5035 /* Probe for ability to use "ThreadInfo" query, as required. */
5036 rs
->use_threadinfo_query
= 1;
5037 rs
->use_threadextra_query
= 1;
5039 readahead_cache_invalidate ();
5041 if (target_async_permitted
)
5043 /* FIXME: cagney/1999-09-23: During the initial connection it is
5044 assumed that the target is already ready and able to respond to
5045 requests. Unfortunately remote_start_remote() eventually calls
5046 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5047 around this. Eventually a mechanism that allows
5048 wait_for_inferior() to expect/get timeouts will be
5050 wait_forever_enabled_p
= 0;
5053 /* First delete any symbols previously loaded from shared libraries. */
5054 no_shared_libraries (NULL
, 0);
5057 init_thread_list ();
5059 /* Start the remote connection. If error() or QUIT, discard this
5060 target (we'd otherwise be in an inconsistent state) and then
5061 propogate the error on up the exception chain. This ensures that
5062 the caller doesn't stumble along blindly assuming that the
5063 function succeeded. The CLI doesn't have this problem but other
5064 UI's, such as MI do.
5066 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5067 this function should return an error indication letting the
5068 caller restore the previous state. Unfortunately the command
5069 ``target remote'' is directly wired to this function making that
5070 impossible. On a positive note, the CLI side of this problem has
5071 been fixed - the function set_cmd_context() makes it possible for
5072 all the ``target ....'' commands to share a common callback
5073 function. See cli-dump.c. */
5078 remote_start_remote (from_tty
, target
, extended_p
);
5080 CATCH (ex
, RETURN_MASK_ALL
)
5082 /* Pop the partially set up target - unless something else did
5083 already before throwing the exception. */
5084 if (rs
->remote_desc
!= NULL
)
5085 remote_unpush_target ();
5086 if (target_async_permitted
)
5087 wait_forever_enabled_p
= 1;
5088 throw_exception (ex
);
5093 remote_btrace_reset ();
5095 if (target_async_permitted
)
5096 wait_forever_enabled_p
= 1;
5099 /* Detach the specified process. */
5102 remote_detach_pid (int pid
)
5104 struct remote_state
*rs
= get_remote_state ();
5106 if (remote_multi_process_p (rs
))
5107 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5109 strcpy (rs
->buf
, "D");
5112 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5114 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5116 else if (rs
->buf
[0] == '\0')
5117 error (_("Remote doesn't know how to detach"));
5119 error (_("Can't detach process."));
5122 /* This detaches a program to which we previously attached, using
5123 inferior_ptid to identify the process. After this is done, GDB
5124 can be used to debug some other program. We better not have left
5125 any breakpoints in the target program or it'll die when it hits
5129 remote_detach_1 (int from_tty
, inferior
*inf
)
5131 int pid
= ptid_get_pid (inferior_ptid
);
5132 struct remote_state
*rs
= get_remote_state ();
5133 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5136 if (!target_has_execution
)
5137 error (_("No process to detach from."));
5139 target_announce_detach (from_tty
);
5141 /* Tell the remote target to detach. */
5142 remote_detach_pid (pid
);
5144 /* Exit only if this is the only active inferior. */
5145 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5146 puts_filtered (_("Ending remote debugging.\n"));
5148 /* Check to see if we are detaching a fork parent. Note that if we
5149 are detaching a fork child, tp == NULL. */
5150 is_fork_parent
= (tp
!= NULL
5151 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5153 /* If doing detach-on-fork, we don't mourn, because that will delete
5154 breakpoints that should be available for the followed inferior. */
5155 if (!is_fork_parent
)
5156 target_mourn_inferior (inferior_ptid
);
5159 inferior_ptid
= null_ptid
;
5160 detach_inferior (pid
);
5165 remote_detach (struct target_ops
*ops
, inferior
*inf
, int from_tty
)
5167 remote_detach_1 (from_tty
, inf
);
5171 extended_remote_detach (struct target_ops
*ops
, inferior
*inf
, int from_tty
)
5173 remote_detach_1 (from_tty
, inf
);
5176 /* Target follow-fork function for remote targets. On entry, and
5177 at return, the current inferior is the fork parent.
5179 Note that although this is currently only used for extended-remote,
5180 it is named remote_follow_fork in anticipation of using it for the
5181 remote target as well. */
5184 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5187 struct remote_state
*rs
= get_remote_state ();
5188 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5190 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5191 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5193 /* When following the parent and detaching the child, we detach
5194 the child here. For the case of following the child and
5195 detaching the parent, the detach is done in the target-
5196 independent follow fork code in infrun.c. We can't use
5197 target_detach when detaching an unfollowed child because
5198 the client side doesn't know anything about the child. */
5199 if (detach_fork
&& !follow_child
)
5201 /* Detach the fork child. */
5205 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5206 child_pid
= ptid_get_pid (child_ptid
);
5208 remote_detach_pid (child_pid
);
5214 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5215 in the program space of the new inferior. On entry and at return the
5216 current inferior is the exec'ing inferior. INF is the new exec'd
5217 inferior, which may be the same as the exec'ing inferior unless
5218 follow-exec-mode is "new". */
5221 remote_follow_exec (struct target_ops
*ops
,
5222 struct inferior
*inf
, char *execd_pathname
)
5224 /* We know that this is a target file name, so if it has the "target:"
5225 prefix we strip it off before saving it in the program space. */
5226 if (is_target_filename (execd_pathname
))
5227 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5229 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5232 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5235 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5238 error (_("Argument given to \"disconnect\" when remotely debugging."));
5240 /* Make sure we unpush even the extended remote targets. Calling
5241 target_mourn_inferior won't unpush, and remote_mourn won't
5242 unpush if there is more than one inferior left. */
5243 unpush_target (target
);
5244 generic_mourn_inferior ();
5247 puts_filtered ("Ending remote debugging.\n");
5250 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5251 be chatty about it. */
5254 extended_remote_attach (struct target_ops
*target
, const char *args
,
5257 struct remote_state
*rs
= get_remote_state ();
5259 char *wait_status
= NULL
;
5261 pid
= parse_pid_to_attach (args
);
5263 /* Remote PID can be freely equal to getpid, do not check it here the same
5264 way as in other targets. */
5266 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5267 error (_("This target does not support attaching to a process"));
5271 char *exec_file
= get_exec_file (0);
5274 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5275 target_pid_to_str (pid_to_ptid (pid
)));
5277 printf_unfiltered (_("Attaching to %s\n"),
5278 target_pid_to_str (pid_to_ptid (pid
)));
5280 gdb_flush (gdb_stdout
);
5283 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5285 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5287 switch (packet_ok (rs
->buf
,
5288 &remote_protocol_packets
[PACKET_vAttach
]))
5291 if (!target_is_non_stop_p ())
5293 /* Save the reply for later. */
5294 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5295 strcpy (wait_status
, rs
->buf
);
5297 else if (strcmp (rs
->buf
, "OK") != 0)
5298 error (_("Attaching to %s failed with: %s"),
5299 target_pid_to_str (pid_to_ptid (pid
)),
5302 case PACKET_UNKNOWN
:
5303 error (_("This target does not support attaching to a process"));
5305 error (_("Attaching to %s failed"),
5306 target_pid_to_str (pid_to_ptid (pid
)));
5309 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5311 inferior_ptid
= pid_to_ptid (pid
);
5313 if (target_is_non_stop_p ())
5315 struct thread_info
*thread
;
5317 /* Get list of threads. */
5318 remote_update_thread_list (target
);
5320 thread
= first_thread_of_process (pid
);
5322 inferior_ptid
= thread
->ptid
;
5324 inferior_ptid
= pid_to_ptid (pid
);
5326 /* Invalidate our notion of the remote current thread. */
5327 record_currthread (rs
, minus_one_ptid
);
5331 /* Now, if we have thread information, update inferior_ptid. */
5332 inferior_ptid
= remote_current_thread (inferior_ptid
);
5334 /* Add the main thread to the thread list. */
5335 add_thread_silent (inferior_ptid
);
5338 /* Next, if the target can specify a description, read it. We do
5339 this before anything involving memory or registers. */
5340 target_find_description ();
5342 if (!target_is_non_stop_p ())
5344 /* Use the previously fetched status. */
5345 gdb_assert (wait_status
!= NULL
);
5347 if (target_can_async_p ())
5349 struct notif_event
*reply
5350 = remote_notif_parse (¬if_client_stop
, wait_status
);
5352 push_stop_reply ((struct stop_reply
*) reply
);
5358 gdb_assert (wait_status
!= NULL
);
5359 strcpy (rs
->buf
, wait_status
);
5360 rs
->cached_wait_status
= 1;
5364 gdb_assert (wait_status
== NULL
);
5367 /* Implementation of the to_post_attach method. */
5370 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5372 /* Get text, data & bss offsets. */
5375 /* In certain cases GDB might not have had the chance to start
5376 symbol lookup up until now. This could happen if the debugged
5377 binary is not using shared libraries, the vsyscall page is not
5378 present (on Linux) and the binary itself hadn't changed since the
5379 debugging process was started. */
5380 if (symfile_objfile
!= NULL
)
5381 remote_check_symbols();
5385 /* Check for the availability of vCont. This function should also check
5389 remote_vcont_probe (struct remote_state
*rs
)
5393 strcpy (rs
->buf
, "vCont?");
5395 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5398 /* Make sure that the features we assume are supported. */
5399 if (startswith (buf
, "vCont"))
5402 int support_c
, support_C
;
5404 rs
->supports_vCont
.s
= 0;
5405 rs
->supports_vCont
.S
= 0;
5408 rs
->supports_vCont
.t
= 0;
5409 rs
->supports_vCont
.r
= 0;
5410 while (p
&& *p
== ';')
5413 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5414 rs
->supports_vCont
.s
= 1;
5415 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5416 rs
->supports_vCont
.S
= 1;
5417 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5419 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5421 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5422 rs
->supports_vCont
.t
= 1;
5423 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5424 rs
->supports_vCont
.r
= 1;
5426 p
= strchr (p
, ';');
5429 /* If c, and C are not all supported, we can't use vCont. Clearing
5430 BUF will make packet_ok disable the packet. */
5431 if (!support_c
|| !support_C
)
5435 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5438 /* Helper function for building "vCont" resumptions. Write a
5439 resumption to P. ENDP points to one-passed-the-end of the buffer
5440 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5441 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5442 resumed thread should be single-stepped and/or signalled. If PTID
5443 equals minus_one_ptid, then all threads are resumed; if PTID
5444 represents a process, then all threads of the process are resumed;
5445 the thread to be stepped and/or signalled is given in the global
5449 append_resumption (char *p
, char *endp
,
5450 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5452 struct remote_state
*rs
= get_remote_state ();
5454 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5455 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5457 /* GDB is willing to range step. */
5458 && use_range_stepping
5459 /* Target supports range stepping. */
5460 && rs
->supports_vCont
.r
5461 /* We don't currently support range stepping multiple
5462 threads with a wildcard (though the protocol allows it,
5463 so stubs shouldn't make an active effort to forbid
5465 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5467 struct thread_info
*tp
;
5469 if (ptid_equal (ptid
, minus_one_ptid
))
5471 /* If we don't know about the target thread's tid, then
5472 we're resuming magic_null_ptid (see caller). */
5473 tp
= find_thread_ptid (magic_null_ptid
);
5476 tp
= find_thread_ptid (ptid
);
5477 gdb_assert (tp
!= NULL
);
5479 if (tp
->control
.may_range_step
)
5481 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5483 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5484 phex_nz (tp
->control
.step_range_start
,
5486 phex_nz (tp
->control
.step_range_end
,
5490 p
+= xsnprintf (p
, endp
- p
, ";s");
5493 p
+= xsnprintf (p
, endp
- p
, ";s");
5494 else if (siggnal
!= GDB_SIGNAL_0
)
5495 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5497 p
+= xsnprintf (p
, endp
- p
, ";c");
5499 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5503 /* All (-1) threads of process. */
5504 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5506 p
+= xsnprintf (p
, endp
- p
, ":");
5507 p
= write_ptid (p
, endp
, nptid
);
5509 else if (!ptid_equal (ptid
, minus_one_ptid
))
5511 p
+= xsnprintf (p
, endp
- p
, ":");
5512 p
= write_ptid (p
, endp
, ptid
);
5518 /* Clear the thread's private info on resume. */
5521 resume_clear_thread_private_info (struct thread_info
*thread
)
5523 if (thread
->priv
!= NULL
)
5525 remote_thread_info
*priv
= get_remote_thread_info (thread
);
5527 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5528 priv
->watch_data_address
= 0;
5532 /* Append a vCont continue-with-signal action for threads that have a
5533 non-zero stop signal. */
5536 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5538 struct thread_info
*thread
;
5540 ALL_NON_EXITED_THREADS (thread
)
5541 if (ptid_match (thread
->ptid
, ptid
)
5542 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5543 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5545 p
= append_resumption (p
, endp
, thread
->ptid
,
5546 0, thread
->suspend
.stop_signal
);
5547 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5548 resume_clear_thread_private_info (thread
);
5554 /* Set the target running, using the packets that use Hc
5558 remote_resume_with_hc (struct target_ops
*ops
,
5559 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5561 struct remote_state
*rs
= get_remote_state ();
5562 struct thread_info
*thread
;
5565 rs
->last_sent_signal
= siggnal
;
5566 rs
->last_sent_step
= step
;
5568 /* The c/s/C/S resume packets use Hc, so set the continue
5570 if (ptid_equal (ptid
, minus_one_ptid
))
5571 set_continue_thread (any_thread_ptid
);
5573 set_continue_thread (ptid
);
5575 ALL_NON_EXITED_THREADS (thread
)
5576 resume_clear_thread_private_info (thread
);
5579 if (execution_direction
== EXEC_REVERSE
)
5581 /* We don't pass signals to the target in reverse exec mode. */
5582 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5583 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5586 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5587 error (_("Remote reverse-step not supported."));
5588 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5589 error (_("Remote reverse-continue not supported."));
5591 strcpy (buf
, step
? "bs" : "bc");
5593 else if (siggnal
!= GDB_SIGNAL_0
)
5595 buf
[0] = step
? 'S' : 'C';
5596 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5597 buf
[2] = tohex (((int) siggnal
) & 0xf);
5601 strcpy (buf
, step
? "s" : "c");
5606 /* Resume the remote inferior by using a "vCont" packet. The thread
5607 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5608 resumed thread should be single-stepped and/or signalled. If PTID
5609 equals minus_one_ptid, then all threads are resumed; the thread to
5610 be stepped and/or signalled is given in the global INFERIOR_PTID.
5611 This function returns non-zero iff it resumes the inferior.
5613 This function issues a strict subset of all possible vCont commands
5617 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5619 struct remote_state
*rs
= get_remote_state ();
5623 /* No reverse execution actions defined for vCont. */
5624 if (execution_direction
== EXEC_REVERSE
)
5627 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5628 remote_vcont_probe (rs
);
5630 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5634 endp
= rs
->buf
+ get_remote_packet_size ();
5636 /* If we could generate a wider range of packets, we'd have to worry
5637 about overflowing BUF. Should there be a generic
5638 "multi-part-packet" packet? */
5640 p
+= xsnprintf (p
, endp
- p
, "vCont");
5642 if (ptid_equal (ptid
, magic_null_ptid
))
5644 /* MAGIC_NULL_PTID means that we don't have any active threads,
5645 so we don't have any TID numbers the inferior will
5646 understand. Make sure to only send forms that do not specify
5648 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5650 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5652 /* Resume all threads (of all processes, or of a single
5653 process), with preference for INFERIOR_PTID. This assumes
5654 inferior_ptid belongs to the set of all threads we are about
5656 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5658 /* Step inferior_ptid, with or without signal. */
5659 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5662 /* Also pass down any pending signaled resumption for other
5663 threads not the current. */
5664 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5666 /* And continue others without a signal. */
5667 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5671 /* Scheduler locking; resume only PTID. */
5672 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5675 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5678 if (target_is_non_stop_p ())
5680 /* In non-stop, the stub replies to vCont with "OK". The stop
5681 reply will be reported asynchronously by means of a `%Stop'
5683 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5684 if (strcmp (rs
->buf
, "OK") != 0)
5685 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5691 /* Tell the remote machine to resume. */
5694 remote_resume (struct target_ops
*ops
,
5695 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5697 struct remote_state
*rs
= get_remote_state ();
5699 /* When connected in non-stop mode, the core resumes threads
5700 individually. Resuming remote threads directly in target_resume
5701 would thus result in sending one packet per thread. Instead, to
5702 minimize roundtrip latency, here we just store the resume
5703 request; the actual remote resumption will be done in
5704 target_commit_resume / remote_commit_resume, where we'll be able
5705 to do vCont action coalescing. */
5706 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5708 remote_thread_info
*remote_thr
;
5710 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5711 remote_thr
= get_remote_thread_info (inferior_ptid
);
5713 remote_thr
= get_remote_thread_info (ptid
);
5715 remote_thr
->last_resume_step
= step
;
5716 remote_thr
->last_resume_sig
= siggnal
;
5720 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5721 (explained in remote-notif.c:handle_notification) so
5722 remote_notif_process is not called. We need find a place where
5723 it is safe to start a 'vNotif' sequence. It is good to do it
5724 before resuming inferior, because inferior was stopped and no RSP
5725 traffic at that moment. */
5726 if (!target_is_non_stop_p ())
5727 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5729 rs
->last_resume_exec_dir
= execution_direction
;
5731 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5732 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5733 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5735 /* We are about to start executing the inferior, let's register it
5736 with the event loop. NOTE: this is the one place where all the
5737 execution commands end up. We could alternatively do this in each
5738 of the execution commands in infcmd.c. */
5739 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5740 into infcmd.c in order to allow inferior function calls to work
5741 NOT asynchronously. */
5742 if (target_can_async_p ())
5745 /* We've just told the target to resume. The remote server will
5746 wait for the inferior to stop, and then send a stop reply. In
5747 the mean time, we can't start another command/query ourselves
5748 because the stub wouldn't be ready to process it. This applies
5749 only to the base all-stop protocol, however. In non-stop (which
5750 only supports vCont), the stub replies with an "OK", and is
5751 immediate able to process further serial input. */
5752 if (!target_is_non_stop_p ())
5753 rs
->waiting_for_stop_reply
= 1;
5756 static void check_pending_events_prevent_wildcard_vcont
5757 (int *may_global_wildcard_vcont
);
5758 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5760 /* Private per-inferior info for target remote processes. */
5762 struct remote_inferior
: public private_inferior
5764 /* Whether we can send a wildcard vCont for this process. */
5765 bool may_wildcard_vcont
= true;
5768 /* Get the remote private inferior data associated to INF. */
5770 static remote_inferior
*
5771 get_remote_inferior (inferior
*inf
)
5773 if (inf
->priv
== NULL
)
5774 inf
->priv
.reset (new remote_inferior
);
5776 return static_cast<remote_inferior
*> (inf
->priv
.get ());
5779 /* Structure used to track the construction of a vCont packet in the
5780 outgoing packet buffer. This is used to send multiple vCont
5781 packets if we have more actions than would fit a single packet. */
5783 struct vcont_builder
5785 /* Pointer to the first action. P points here if no action has been
5789 /* Where the next action will be appended. */
5792 /* The end of the buffer. Must never write past this. */
5796 /* Prepare the outgoing buffer for a new vCont packet. */
5799 vcont_builder_restart (struct vcont_builder
*builder
)
5801 struct remote_state
*rs
= get_remote_state ();
5803 builder
->p
= rs
->buf
;
5804 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5805 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5806 builder
->first_action
= builder
->p
;
5809 /* If the vCont packet being built has any action, send it to the
5813 vcont_builder_flush (struct vcont_builder
*builder
)
5815 struct remote_state
*rs
;
5817 if (builder
->p
== builder
->first_action
)
5820 rs
= get_remote_state ();
5822 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5823 if (strcmp (rs
->buf
, "OK") != 0)
5824 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5827 /* The largest action is range-stepping, with its two addresses. This
5828 is more than sufficient. If a new, bigger action is created, it'll
5829 quickly trigger a failed assertion in append_resumption (and we'll
5831 #define MAX_ACTION_SIZE 200
5833 /* Append a new vCont action in the outgoing packet being built. If
5834 the action doesn't fit the packet along with previous actions, push
5835 what we've got so far to the remote end and start over a new vCont
5836 packet (with the new action). */
5839 vcont_builder_push_action (struct vcont_builder
*builder
,
5840 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5842 char buf
[MAX_ACTION_SIZE
+ 1];
5846 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5847 ptid
, step
, siggnal
);
5849 /* Check whether this new action would fit in the vCont packet along
5850 with previous actions. If not, send what we've got so far and
5851 start a new vCont packet. */
5853 if (rsize
> builder
->endp
- builder
->p
)
5855 vcont_builder_flush (builder
);
5856 vcont_builder_restart (builder
);
5858 /* Should now fit. */
5859 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5862 memcpy (builder
->p
, buf
, rsize
);
5863 builder
->p
+= rsize
;
5867 /* to_commit_resume implementation. */
5870 remote_commit_resume (struct target_ops
*ops
)
5872 struct inferior
*inf
;
5873 struct thread_info
*tp
;
5874 int any_process_wildcard
;
5875 int may_global_wildcard_vcont
;
5876 struct vcont_builder vcont_builder
;
5878 /* If connected in all-stop mode, we'd send the remote resume
5879 request directly from remote_resume. Likewise if
5880 reverse-debugging, as there are no defined vCont actions for
5881 reverse execution. */
5882 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5885 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5886 instead of resuming all threads of each process individually.
5887 However, if any thread of a process must remain halted, we can't
5888 send wildcard resumes and must send one action per thread.
5890 Care must be taken to not resume threads/processes the server
5891 side already told us are stopped, but the core doesn't know about
5892 yet, because the events are still in the vStopped notification
5895 #1 => vCont s:p1.1;c
5897 #3 <= %Stopped T05 p1.1
5902 #8 (infrun handles the stop for p1.1 and continues stepping)
5903 #9 => vCont s:p1.1;c
5905 The last vCont above would resume thread p1.2 by mistake, because
5906 the server has no idea that the event for p1.2 had not been
5909 The server side must similarly ignore resume actions for the
5910 thread that has a pending %Stopped notification (and any other
5911 threads with events pending), until GDB acks the notification
5912 with vStopped. Otherwise, e.g., the following case is
5915 #1 => g (or any other packet)
5917 #3 <= %Stopped T05 p1.2
5918 #4 => vCont s:p1.1;c
5921 Above, the server must not resume thread p1.2. GDB can't know
5922 that p1.2 stopped until it acks the %Stopped notification, and
5923 since from GDB's perspective all threads should be running, it
5926 Finally, special care must also be given to handling fork/vfork
5927 events. A (v)fork event actually tells us that two processes
5928 stopped -- the parent and the child. Until we follow the fork,
5929 we must not resume the child. Therefore, if we have a pending
5930 fork follow, we must not send a global wildcard resume action
5931 (vCont;c). We can still send process-wide wildcards though. */
5933 /* Start by assuming a global wildcard (vCont;c) is possible. */
5934 may_global_wildcard_vcont
= 1;
5936 /* And assume every process is individually wildcard-able too. */
5937 ALL_NON_EXITED_INFERIORS (inf
)
5939 remote_inferior
*priv
= get_remote_inferior (inf
);
5941 priv
->may_wildcard_vcont
= true;
5944 /* Check for any pending events (not reported or processed yet) and
5945 disable process and global wildcard resumes appropriately. */
5946 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
5948 ALL_NON_EXITED_THREADS (tp
)
5950 /* If a thread of a process is not meant to be resumed, then we
5951 can't wildcard that process. */
5954 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
5956 /* And if we can't wildcard a process, we can't wildcard
5957 everything either. */
5958 may_global_wildcard_vcont
= 0;
5962 /* If a thread is the parent of an unfollowed fork, then we
5963 can't do a global wildcard, as that would resume the fork
5965 if (is_pending_fork_parent_thread (tp
))
5966 may_global_wildcard_vcont
= 0;
5969 /* Now let's build the vCont packet(s). Actions must be appended
5970 from narrower to wider scopes (thread -> process -> global). If
5971 we end up with too many actions for a single packet vcont_builder
5972 flushes the current vCont packet to the remote side and starts a
5974 vcont_builder_restart (&vcont_builder
);
5976 /* Threads first. */
5977 ALL_NON_EXITED_THREADS (tp
)
5979 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
5981 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
5984 gdb_assert (!thread_is_in_step_over_chain (tp
));
5986 if (!remote_thr
->last_resume_step
5987 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
5988 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
5990 /* We'll send a wildcard resume instead. */
5991 remote_thr
->vcont_resumed
= 1;
5995 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
5996 remote_thr
->last_resume_step
,
5997 remote_thr
->last_resume_sig
);
5998 remote_thr
->vcont_resumed
= 1;
6001 /* Now check whether we can send any process-wide wildcard. This is
6002 to avoid sending a global wildcard in the case nothing is
6003 supposed to be resumed. */
6004 any_process_wildcard
= 0;
6006 ALL_NON_EXITED_INFERIORS (inf
)
6008 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6010 any_process_wildcard
= 1;
6015 if (any_process_wildcard
)
6017 /* If all processes are wildcard-able, then send a single "c"
6018 action, otherwise, send an "all (-1) threads of process"
6019 continue action for each running process, if any. */
6020 if (may_global_wildcard_vcont
)
6022 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6027 ALL_NON_EXITED_INFERIORS (inf
)
6029 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6031 vcont_builder_push_action (&vcont_builder
,
6032 pid_to_ptid (inf
->pid
),
6039 vcont_builder_flush (&vcont_builder
);
6044 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6045 thread, all threads of a remote process, or all threads of all
6049 remote_stop_ns (ptid_t ptid
)
6051 struct remote_state
*rs
= get_remote_state ();
6053 char *endp
= rs
->buf
+ get_remote_packet_size ();
6055 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6056 remote_vcont_probe (rs
);
6058 if (!rs
->supports_vCont
.t
)
6059 error (_("Remote server does not support stopping threads"));
6061 if (ptid_equal (ptid
, minus_one_ptid
)
6062 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6063 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6068 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6070 if (ptid_is_pid (ptid
))
6071 /* All (-1) threads of process. */
6072 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6075 /* Small optimization: if we already have a stop reply for
6076 this thread, no use in telling the stub we want this
6078 if (peek_stop_reply (ptid
))
6084 write_ptid (p
, endp
, nptid
);
6087 /* In non-stop, we get an immediate OK reply. The stop reply will
6088 come in asynchronously by notification. */
6090 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6091 if (strcmp (rs
->buf
, "OK") != 0)
6092 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6095 /* All-stop version of target_interrupt. Sends a break or a ^C to
6096 interrupt the remote target. It is undefined which thread of which
6097 process reports the interrupt. */
6100 remote_interrupt_as (void)
6102 struct remote_state
*rs
= get_remote_state ();
6104 rs
->ctrlc_pending_p
= 1;
6106 /* If the inferior is stopped already, but the core didn't know
6107 about it yet, just ignore the request. The cached wait status
6108 will be collected in remote_wait. */
6109 if (rs
->cached_wait_status
)
6112 /* Send interrupt_sequence to remote target. */
6113 send_interrupt_sequence ();
6116 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6117 the remote target. It is undefined which thread of which process
6118 reports the interrupt. Throws an error if the packet is not
6119 supported by the server. */
6122 remote_interrupt_ns (void)
6124 struct remote_state
*rs
= get_remote_state ();
6126 char *endp
= rs
->buf
+ get_remote_packet_size ();
6128 xsnprintf (p
, endp
- p
, "vCtrlC");
6130 /* In non-stop, we get an immediate OK reply. The stop reply will
6131 come in asynchronously by notification. */
6133 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6135 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6139 case PACKET_UNKNOWN
:
6140 error (_("No support for interrupting the remote target."));
6142 error (_("Interrupting target failed: %s"), rs
->buf
);
6146 /* Implement the to_stop function for the remote targets. */
6149 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6152 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6154 if (target_is_non_stop_p ())
6155 remote_stop_ns (ptid
);
6158 /* We don't currently have a way to transparently pause the
6159 remote target in all-stop mode. Interrupt it instead. */
6160 remote_interrupt_as ();
6164 /* Implement the to_interrupt function for the remote targets. */
6167 remote_interrupt (struct target_ops
*self
)
6170 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6172 if (target_is_non_stop_p ())
6173 remote_interrupt_ns ();
6175 remote_interrupt_as ();
6178 /* Implement the to_pass_ctrlc function for the remote targets. */
6181 remote_pass_ctrlc (struct target_ops
*self
)
6183 struct remote_state
*rs
= get_remote_state ();
6186 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6188 /* If we're starting up, we're not fully synced yet. Quit
6190 if (rs
->starting_up
)
6192 /* If ^C has already been sent once, offer to disconnect. */
6193 else if (rs
->ctrlc_pending_p
)
6196 target_interrupt ();
6199 /* Ask the user what to do when an interrupt is received. */
6202 interrupt_query (void)
6204 struct remote_state
*rs
= get_remote_state ();
6206 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6208 if (query (_("The target is not responding to interrupt requests.\n"
6209 "Stop debugging it? ")))
6211 remote_unpush_target ();
6212 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6217 if (query (_("Interrupted while waiting for the program.\n"
6218 "Give up waiting? ")))
6223 /* Enable/disable target terminal ownership. Most targets can use
6224 terminal groups to control terminal ownership. Remote targets are
6225 different in that explicit transfer of ownership to/from GDB/target
6229 remote_terminal_inferior (struct target_ops
*self
)
6231 /* NOTE: At this point we could also register our selves as the
6232 recipient of all input. Any characters typed could then be
6233 passed on down to the target. */
6237 remote_terminal_ours (struct target_ops
*self
)
6242 remote_console_output (char *msg
)
6246 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6249 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6253 fputs_unfiltered (tb
, gdb_stdtarg
);
6255 gdb_flush (gdb_stdtarg
);
6258 DEF_VEC_O(cached_reg_t
);
6260 typedef struct stop_reply
6262 struct notif_event base
;
6264 /* The identifier of the thread about this event */
6267 /* The remote state this event is associated with. When the remote
6268 connection, represented by a remote_state object, is closed,
6269 all the associated stop_reply events should be released. */
6270 struct remote_state
*rs
;
6272 struct target_waitstatus ws
;
6274 /* The architecture associated with the expedited registers. */
6277 /* Expedited registers. This makes remote debugging a bit more
6278 efficient for those targets that provide critical registers as
6279 part of their normal status mechanism (as another roundtrip to
6280 fetch them is avoided). */
6281 VEC(cached_reg_t
) *regcache
;
6283 enum target_stop_reason stop_reason
;
6285 CORE_ADDR watch_data_address
;
6290 DECLARE_QUEUE_P (stop_reply_p
);
6291 DEFINE_QUEUE_P (stop_reply_p
);
6292 /* The list of already fetched and acknowledged stop events. This
6293 queue is used for notification Stop, and other notifications
6294 don't need queue for their events, because the notification events
6295 of Stop can't be consumed immediately, so that events should be
6296 queued first, and be consumed by remote_wait_{ns,as} one per
6297 time. Other notifications can consume their events immediately,
6298 so queue is not needed for them. */
6299 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6302 stop_reply_xfree (struct stop_reply
*r
)
6304 notif_event_xfree ((struct notif_event
*) r
);
6307 /* Return the length of the stop reply queue. */
6310 stop_reply_queue_length (void)
6312 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6316 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6317 struct notif_event
*event
)
6319 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6323 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6324 struct notif_event
*event
)
6326 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6329 putpkt (self
->ack_command
);
6331 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6332 /* We got an unknown stop reply. */
6333 error (_("Unknown stop reply"));
6335 push_stop_reply (stop_reply
);
6339 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6341 /* We can't get pending events in remote_notif_process for
6342 notification stop, and we have to do this in remote_wait_ns
6343 instead. If we fetch all queued events from stub, remote stub
6344 may exit and we have no chance to process them back in
6346 mark_async_event_handler (remote_async_inferior_event_token
);
6351 stop_reply_dtr (struct notif_event
*event
)
6353 struct stop_reply
*r
= (struct stop_reply
*) event
;
6358 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6362 VEC_free (cached_reg_t
, r
->regcache
);
6365 static struct notif_event
*
6366 remote_notif_stop_alloc_reply (void)
6368 /* We cast to a pointer to the "base class". */
6369 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6371 r
->dtr
= stop_reply_dtr
;
6376 /* A client of notification Stop. */
6378 struct notif_client notif_client_stop
=
6382 remote_notif_stop_parse
,
6383 remote_notif_stop_ack
,
6384 remote_notif_stop_can_get_pending_events
,
6385 remote_notif_stop_alloc_reply
,
6389 /* A parameter to pass data in and out. */
6391 struct queue_iter_param
6394 struct stop_reply
*output
;
6397 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6398 the pid of the process that owns the threads we want to check, or
6399 -1 if we want to check all threads. */
6402 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6405 if (ws
->kind
== TARGET_WAITKIND_FORKED
6406 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6408 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6415 /* Return the thread's pending status used to determine whether the
6416 thread is a fork parent stopped at a fork event. */
6418 static struct target_waitstatus
*
6419 thread_pending_fork_status (struct thread_info
*thread
)
6421 if (thread
->suspend
.waitstatus_pending_p
)
6422 return &thread
->suspend
.waitstatus
;
6424 return &thread
->pending_follow
;
6427 /* Determine if THREAD is a pending fork parent thread. */
6430 is_pending_fork_parent_thread (struct thread_info
*thread
)
6432 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6435 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6438 /* Check whether EVENT is a fork event, and if it is, remove the
6439 fork child from the context list passed in DATA. */
6442 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6443 QUEUE_ITER (stop_reply_p
) *iter
,
6447 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6448 struct threads_listing_context
*context
6449 = (struct threads_listing_context
*) param
->input
;
6451 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6452 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6453 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6454 context
->remove_thread (event
->ws
.value
.related_pid
);
6459 /* If CONTEXT contains any fork child threads that have not been
6460 reported yet, remove them from the CONTEXT list. If such a
6461 thread exists it is because we are stopped at a fork catchpoint
6462 and have not yet called follow_fork, which will set up the
6463 host-side data structures for the new process. */
6466 remove_new_fork_children (struct threads_listing_context
*context
)
6468 struct thread_info
* thread
;
6470 struct notif_client
*notif
= ¬if_client_stop
;
6471 struct queue_iter_param param
;
6473 /* For any threads stopped at a fork event, remove the corresponding
6474 fork child threads from the CONTEXT list. */
6475 ALL_NON_EXITED_THREADS (thread
)
6477 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6479 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6480 context
->remove_thread (ws
->value
.related_pid
);
6483 /* Check for any pending fork events (not reported or processed yet)
6484 in process PID and remove those fork child threads from the
6485 CONTEXT list as well. */
6486 remote_notif_get_pending_events (notif
);
6487 param
.input
= context
;
6488 param
.output
= NULL
;
6489 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6490 remove_child_of_pending_fork
, ¶m
);
6493 /* Check whether EVENT would prevent a global or process wildcard
6497 check_pending_event_prevents_wildcard_vcont_callback
6498 (QUEUE (stop_reply_p
) *q
,
6499 QUEUE_ITER (stop_reply_p
) *iter
,
6503 struct inferior
*inf
;
6504 int *may_global_wildcard_vcont
= (int *) data
;
6506 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6507 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6510 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6511 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6512 *may_global_wildcard_vcont
= 0;
6514 inf
= find_inferior_ptid (event
->ptid
);
6516 /* This may be the first time we heard about this process.
6517 Regardless, we must not do a global wildcard resume, otherwise
6518 we'd resume this process too. */
6519 *may_global_wildcard_vcont
= 0;
6521 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
6526 /* Check whether any event pending in the vStopped queue would prevent
6527 a global or process wildcard vCont action. Clear
6528 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6529 and clear the event inferior's may_wildcard_vcont flag if we can't
6530 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6533 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6535 struct notif_client
*notif
= ¬if_client_stop
;
6537 remote_notif_get_pending_events (notif
);
6538 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6539 check_pending_event_prevents_wildcard_vcont_callback
,
6540 may_global_wildcard
);
6543 /* Remove stop replies in the queue if its pid is equal to the given
6547 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6548 QUEUE_ITER (stop_reply_p
) *iter
,
6552 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6553 struct inferior
*inf
= (struct inferior
*) param
->input
;
6555 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6557 stop_reply_xfree (event
);
6558 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6564 /* Discard all pending stop replies of inferior INF. */
6567 discard_pending_stop_replies (struct inferior
*inf
)
6569 struct queue_iter_param param
;
6570 struct stop_reply
*reply
;
6571 struct remote_state
*rs
= get_remote_state ();
6572 struct remote_notif_state
*rns
= rs
->notif_state
;
6574 /* This function can be notified when an inferior exists. When the
6575 target is not remote, the notification state is NULL. */
6576 if (rs
->remote_desc
== NULL
)
6579 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6581 /* Discard the in-flight notification. */
6582 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6584 stop_reply_xfree (reply
);
6585 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6589 param
.output
= NULL
;
6590 /* Discard the stop replies we have already pulled with
6592 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6593 remove_stop_reply_for_inferior
, ¶m
);
6596 /* If its remote state is equal to the given remote state,
6597 remove EVENT from the stop reply queue. */
6600 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6601 QUEUE_ITER (stop_reply_p
) *iter
,
6605 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6606 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6608 if (event
->rs
== rs
)
6610 stop_reply_xfree (event
);
6611 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6617 /* Discard the stop replies for RS in stop_reply_queue. */
6620 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6622 struct queue_iter_param param
;
6625 param
.output
= NULL
;
6626 /* Discard the stop replies we have already pulled with
6628 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6629 remove_stop_reply_of_remote_state
, ¶m
);
6632 /* A parameter to pass data in and out. */
6635 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6636 QUEUE_ITER (stop_reply_p
) *iter
,
6640 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6641 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6643 if (ptid_match (event
->ptid
, *ptid
))
6645 param
->output
= event
;
6646 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6653 /* Remove the first reply in 'stop_reply_queue' which matches
6656 static struct stop_reply
*
6657 remote_notif_remove_queued_reply (ptid_t ptid
)
6659 struct queue_iter_param param
;
6661 param
.input
= &ptid
;
6662 param
.output
= NULL
;
6664 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6665 remote_notif_remove_once_on_match
, ¶m
);
6667 fprintf_unfiltered (gdb_stdlog
,
6668 "notif: discard queued event: 'Stop' in %s\n",
6669 target_pid_to_str (ptid
));
6671 return param
.output
;
6674 /* Look for a queued stop reply belonging to PTID. If one is found,
6675 remove it from the queue, and return it. Returns NULL if none is
6676 found. If there are still queued events left to process, tell the
6677 event loop to get back to target_wait soon. */
6679 static struct stop_reply
*
6680 queued_stop_reply (ptid_t ptid
)
6682 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6684 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6685 /* There's still at least an event left. */
6686 mark_async_event_handler (remote_async_inferior_event_token
);
6691 /* Push a fully parsed stop reply in the stop reply queue. Since we
6692 know that we now have at least one queued event left to pass to the
6693 core side, tell the event loop to get back to target_wait soon. */
6696 push_stop_reply (struct stop_reply
*new_event
)
6698 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6701 fprintf_unfiltered (gdb_stdlog
,
6702 "notif: push 'Stop' %s to queue %d\n",
6703 target_pid_to_str (new_event
->ptid
),
6704 QUEUE_length (stop_reply_p
,
6707 mark_async_event_handler (remote_async_inferior_event_token
);
6711 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6712 QUEUE_ITER (stop_reply_p
) *iter
,
6713 struct stop_reply
*event
,
6716 ptid_t
*ptid
= (ptid_t
*) data
;
6718 return !(ptid_equal (*ptid
, event
->ptid
)
6719 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6722 /* Returns true if we have a stop reply for PTID. */
6725 peek_stop_reply (ptid_t ptid
)
6727 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6728 stop_reply_match_ptid_and_ws
, &ptid
);
6731 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6732 starting with P and ending with PEND matches PREFIX. */
6735 strprefix (const char *p
, const char *pend
, const char *prefix
)
6737 for ( ; p
< pend
; p
++, prefix
++)
6740 return *prefix
== '\0';
6743 /* Parse the stop reply in BUF. Either the function succeeds, and the
6744 result is stored in EVENT, or throws an error. */
6747 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6749 remote_arch_state
*rsa
= NULL
;
6754 event
->ptid
= null_ptid
;
6755 event
->rs
= get_remote_state ();
6756 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6757 event
->ws
.value
.integer
= 0;
6758 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6759 event
->regcache
= NULL
;
6764 case 'T': /* Status with PC, SP, FP, ... */
6765 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6766 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6768 n... = register number
6769 r... = register contents
6772 p
= &buf
[3]; /* after Txx */
6778 p1
= strchr (p
, ':');
6780 error (_("Malformed packet(a) (missing colon): %s\n\
6784 error (_("Malformed packet(a) (missing register number): %s\n\
6788 /* Some "registers" are actually extended stop information.
6789 Note if you're adding a new entry here: GDB 7.9 and
6790 earlier assume that all register "numbers" that start
6791 with an hex digit are real register numbers. Make sure
6792 the server only sends such a packet if it knows the
6793 client understands it. */
6795 if (strprefix (p
, p1
, "thread"))
6796 event
->ptid
= read_ptid (++p1
, &p
);
6797 else if (strprefix (p
, p1
, "syscall_entry"))
6801 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6802 p
= unpack_varlen_hex (++p1
, &sysno
);
6803 event
->ws
.value
.syscall_number
= (int) sysno
;
6805 else if (strprefix (p
, p1
, "syscall_return"))
6809 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6810 p
= unpack_varlen_hex (++p1
, &sysno
);
6811 event
->ws
.value
.syscall_number
= (int) sysno
;
6813 else if (strprefix (p
, p1
, "watch")
6814 || strprefix (p
, p1
, "rwatch")
6815 || strprefix (p
, p1
, "awatch"))
6817 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6818 p
= unpack_varlen_hex (++p1
, &addr
);
6819 event
->watch_data_address
= (CORE_ADDR
) addr
;
6821 else if (strprefix (p
, p1
, "swbreak"))
6823 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6825 /* Make sure the stub doesn't forget to indicate support
6827 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6828 error (_("Unexpected swbreak stop reason"));
6830 /* The value part is documented as "must be empty",
6831 though we ignore it, in case we ever decide to make
6832 use of it in a backward compatible way. */
6833 p
= strchrnul (p1
+ 1, ';');
6835 else if (strprefix (p
, p1
, "hwbreak"))
6837 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6839 /* Make sure the stub doesn't forget to indicate support
6841 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6842 error (_("Unexpected hwbreak stop reason"));
6845 p
= strchrnul (p1
+ 1, ';');
6847 else if (strprefix (p
, p1
, "library"))
6849 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6850 p
= strchrnul (p1
+ 1, ';');
6852 else if (strprefix (p
, p1
, "replaylog"))
6854 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6855 /* p1 will indicate "begin" or "end", but it makes
6856 no difference for now, so ignore it. */
6857 p
= strchrnul (p1
+ 1, ';');
6859 else if (strprefix (p
, p1
, "core"))
6863 p
= unpack_varlen_hex (++p1
, &c
);
6866 else if (strprefix (p
, p1
, "fork"))
6868 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6869 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6871 else if (strprefix (p
, p1
, "vfork"))
6873 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6874 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6876 else if (strprefix (p
, p1
, "vforkdone"))
6878 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6879 p
= strchrnul (p1
+ 1, ';');
6881 else if (strprefix (p
, p1
, "exec"))
6884 char pathname
[PATH_MAX
];
6887 /* Determine the length of the execd pathname. */
6888 p
= unpack_varlen_hex (++p1
, &ignored
);
6889 pathlen
= (p
- p1
) / 2;
6891 /* Save the pathname for event reporting and for
6892 the next run command. */
6893 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6894 pathname
[pathlen
] = '\0';
6896 /* This is freed during event handling. */
6897 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6898 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6900 /* Skip the registers included in this packet, since
6901 they may be for an architecture different from the
6902 one used by the original program. */
6905 else if (strprefix (p
, p1
, "create"))
6907 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6908 p
= strchrnul (p1
+ 1, ';');
6917 p
= strchrnul (p1
+ 1, ';');
6922 /* Maybe a real ``P'' register number. */
6923 p_temp
= unpack_varlen_hex (p
, &pnum
);
6924 /* If the first invalid character is the colon, we got a
6925 register number. Otherwise, it's an unknown stop
6929 /* If we haven't parsed the event's thread yet, find
6930 it now, in order to find the architecture of the
6931 reported expedited registers. */
6932 if (event
->ptid
== null_ptid
)
6934 const char *thr
= strstr (p1
+ 1, ";thread:");
6936 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
6940 /* Either the current thread hasn't changed,
6941 or the inferior is not multi-threaded.
6942 The event must be for the thread we last
6943 set as (or learned as being) current. */
6944 event
->ptid
= event
->rs
->general_thread
;
6950 inferior
*inf
= (event
->ptid
== null_ptid
6952 : find_inferior_ptid (event
->ptid
));
6953 /* If this is the first time we learn anything
6954 about this process, skip the registers
6955 included in this packet, since we don't yet
6956 know which architecture to use to parse them.
6957 We'll determine the architecture later when
6958 we process the stop reply and retrieve the
6959 target description, via
6960 remote_notice_new_inferior ->
6961 post_create_inferior. */
6964 p
= strchrnul (p1
+ 1, ';');
6969 event
->arch
= inf
->gdbarch
;
6970 rsa
= get_remote_arch_state (event
->arch
);
6974 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
6975 cached_reg_t cached_reg
;
6978 error (_("Remote sent bad register number %s: %s\n\
6980 hex_string (pnum
), p
, buf
);
6982 cached_reg
.num
= reg
->regnum
;
6983 cached_reg
.data
= (gdb_byte
*)
6984 xmalloc (register_size (event
->arch
, reg
->regnum
));
6987 fieldsize
= hex2bin (p
, cached_reg
.data
,
6988 register_size (event
->arch
, reg
->regnum
));
6990 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
6991 warning (_("Remote reply is too short: %s"), buf
);
6993 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
6997 /* Not a number. Silently skip unknown optional
6999 p
= strchrnul (p1
+ 1, ';');
7004 error (_("Remote register badly formatted: %s\nhere: %s"),
7009 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7013 case 'S': /* Old style status, just signal only. */
7017 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7018 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7019 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7020 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7022 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7025 case 'w': /* Thread exited. */
7030 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7031 p
= unpack_varlen_hex (&buf
[1], &value
);
7032 event
->ws
.value
.integer
= value
;
7034 error (_("stop reply packet badly formatted: %s"), buf
);
7035 event
->ptid
= read_ptid (++p
, NULL
);
7038 case 'W': /* Target exited. */
7045 /* GDB used to accept only 2 hex chars here. Stubs should
7046 only send more if they detect GDB supports multi-process
7048 p
= unpack_varlen_hex (&buf
[1], &value
);
7052 /* The remote process exited. */
7053 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7054 event
->ws
.value
.integer
= value
;
7058 /* The remote process exited with a signal. */
7059 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7060 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7061 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7063 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7066 /* If no process is specified, assume inferior_ptid. */
7067 pid
= ptid_get_pid (inferior_ptid
);
7076 else if (startswith (p
, "process:"))
7080 p
+= sizeof ("process:") - 1;
7081 unpack_varlen_hex (p
, &upid
);
7085 error (_("unknown stop reply packet: %s"), buf
);
7088 error (_("unknown stop reply packet: %s"), buf
);
7089 event
->ptid
= pid_to_ptid (pid
);
7093 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7094 event
->ptid
= minus_one_ptid
;
7098 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7099 error (_("No process or thread specified in stop reply: %s"), buf
);
7102 /* When the stub wants to tell GDB about a new notification reply, it
7103 sends a notification (%Stop, for example). Those can come it at
7104 any time, hence, we have to make sure that any pending
7105 putpkt/getpkt sequence we're making is finished, before querying
7106 the stub for more events with the corresponding ack command
7107 (vStopped, for example). E.g., if we started a vStopped sequence
7108 immediately upon receiving the notification, something like this
7116 1.6) <-- (registers reply to step #1.3)
7118 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7121 To solve this, whenever we parse a %Stop notification successfully,
7122 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7123 doing whatever we were doing:
7129 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7130 2.5) <-- (registers reply to step #2.3)
7132 Eventualy after step #2.5, we return to the event loop, which
7133 notices there's an event on the
7134 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7135 associated callback --- the function below. At this point, we're
7136 always safe to start a vStopped sequence. :
7139 2.7) <-- T05 thread:2
7145 remote_notif_get_pending_events (struct notif_client
*nc
)
7147 struct remote_state
*rs
= get_remote_state ();
7149 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7152 fprintf_unfiltered (gdb_stdlog
,
7153 "notif: process: '%s' ack pending event\n",
7157 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7158 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7162 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7163 if (strcmp (rs
->buf
, "OK") == 0)
7166 remote_notif_ack (nc
, rs
->buf
);
7172 fprintf_unfiltered (gdb_stdlog
,
7173 "notif: process: '%s' no pending reply\n",
7178 /* Called when it is decided that STOP_REPLY holds the info of the
7179 event that is to be returned to the core. This function always
7180 destroys STOP_REPLY. */
7183 process_stop_reply (struct stop_reply
*stop_reply
,
7184 struct target_waitstatus
*status
)
7188 *status
= stop_reply
->ws
;
7189 ptid
= stop_reply
->ptid
;
7191 /* If no thread/process was reported by the stub, assume the current
7193 if (ptid_equal (ptid
, null_ptid
))
7194 ptid
= inferior_ptid
;
7196 if (status
->kind
!= TARGET_WAITKIND_EXITED
7197 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7198 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7200 /* Expedited registers. */
7201 if (stop_reply
->regcache
)
7203 struct regcache
*regcache
7204 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7209 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7212 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7216 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7219 remote_notice_new_inferior (ptid
, 0);
7220 remote_thread_info
*remote_thr
= get_remote_thread_info (ptid
);
7221 remote_thr
->core
= stop_reply
->core
;
7222 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7223 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7224 remote_thr
->vcont_resumed
= 0;
7227 stop_reply_xfree (stop_reply
);
7231 /* The non-stop mode version of target_wait. */
7234 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7236 struct remote_state
*rs
= get_remote_state ();
7237 struct stop_reply
*stop_reply
;
7241 /* If in non-stop mode, get out of getpkt even if a
7242 notification is received. */
7244 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7245 0 /* forever */, &is_notif
);
7248 if (ret
!= -1 && !is_notif
)
7251 case 'E': /* Error of some sort. */
7252 /* We're out of sync with the target now. Did it continue
7253 or not? We can't tell which thread it was in non-stop,
7254 so just ignore this. */
7255 warning (_("Remote failure reply: %s"), rs
->buf
);
7257 case 'O': /* Console output. */
7258 remote_console_output (rs
->buf
+ 1);
7261 warning (_("Invalid remote reply: %s"), rs
->buf
);
7265 /* Acknowledge a pending stop reply that may have arrived in the
7267 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7268 remote_notif_get_pending_events (¬if_client_stop
);
7270 /* If indeed we noticed a stop reply, we're done. */
7271 stop_reply
= queued_stop_reply (ptid
);
7272 if (stop_reply
!= NULL
)
7273 return process_stop_reply (stop_reply
, status
);
7275 /* Still no event. If we're just polling for an event, then
7276 return to the event loop. */
7277 if (options
& TARGET_WNOHANG
)
7279 status
->kind
= TARGET_WAITKIND_IGNORE
;
7280 return minus_one_ptid
;
7283 /* Otherwise do a blocking wait. */
7284 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7285 1 /* forever */, &is_notif
);
7289 /* Wait until the remote machine stops, then return, storing status in
7290 STATUS just as `wait' would. */
7293 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7295 struct remote_state
*rs
= get_remote_state ();
7296 ptid_t event_ptid
= null_ptid
;
7298 struct stop_reply
*stop_reply
;
7302 status
->kind
= TARGET_WAITKIND_IGNORE
;
7303 status
->value
.integer
= 0;
7305 stop_reply
= queued_stop_reply (ptid
);
7306 if (stop_reply
!= NULL
)
7307 return process_stop_reply (stop_reply
, status
);
7309 if (rs
->cached_wait_status
)
7310 /* Use the cached wait status, but only once. */
7311 rs
->cached_wait_status
= 0;
7316 int forever
= ((options
& TARGET_WNOHANG
) == 0
7317 && wait_forever_enabled_p
);
7319 if (!rs
->waiting_for_stop_reply
)
7321 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7322 return minus_one_ptid
;
7325 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7326 _never_ wait for ever -> test on target_is_async_p().
7327 However, before we do that we need to ensure that the caller
7328 knows how to take the target into/out of async mode. */
7329 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7330 forever
, &is_notif
);
7332 /* GDB gets a notification. Return to core as this event is
7334 if (ret
!= -1 && is_notif
)
7335 return minus_one_ptid
;
7337 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7338 return minus_one_ptid
;
7343 /* Assume that the target has acknowledged Ctrl-C unless we receive
7344 an 'F' or 'O' packet. */
7345 if (buf
[0] != 'F' && buf
[0] != 'O')
7346 rs
->ctrlc_pending_p
= 0;
7350 case 'E': /* Error of some sort. */
7351 /* We're out of sync with the target now. Did it continue or
7352 not? Not is more likely, so report a stop. */
7353 rs
->waiting_for_stop_reply
= 0;
7355 warning (_("Remote failure reply: %s"), buf
);
7356 status
->kind
= TARGET_WAITKIND_STOPPED
;
7357 status
->value
.sig
= GDB_SIGNAL_0
;
7359 case 'F': /* File-I/O request. */
7360 /* GDB may access the inferior memory while handling the File-I/O
7361 request, but we don't want GDB accessing memory while waiting
7362 for a stop reply. See the comments in putpkt_binary. Set
7363 waiting_for_stop_reply to 0 temporarily. */
7364 rs
->waiting_for_stop_reply
= 0;
7365 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7366 rs
->ctrlc_pending_p
= 0;
7367 /* GDB handled the File-I/O request, and the target is running
7368 again. Keep waiting for events. */
7369 rs
->waiting_for_stop_reply
= 1;
7371 case 'N': case 'T': case 'S': case 'X': case 'W':
7373 struct stop_reply
*stop_reply
;
7375 /* There is a stop reply to handle. */
7376 rs
->waiting_for_stop_reply
= 0;
7379 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7382 event_ptid
= process_stop_reply (stop_reply
, status
);
7385 case 'O': /* Console output. */
7386 remote_console_output (buf
+ 1);
7389 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7391 /* Zero length reply means that we tried 'S' or 'C' and the
7392 remote system doesn't support it. */
7393 target_terminal::ours_for_output ();
7395 ("Can't send signals to this remote system. %s not sent.\n",
7396 gdb_signal_to_name (rs
->last_sent_signal
));
7397 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7398 target_terminal::inferior ();
7400 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7404 /* else fallthrough */
7406 warning (_("Invalid remote reply: %s"), buf
);
7410 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7411 return minus_one_ptid
;
7412 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7414 /* Nothing interesting happened. If we're doing a non-blocking
7415 poll, we're done. Otherwise, go back to waiting. */
7416 if (options
& TARGET_WNOHANG
)
7417 return minus_one_ptid
;
7421 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7422 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7424 if (!ptid_equal (event_ptid
, null_ptid
))
7425 record_currthread (rs
, event_ptid
);
7427 event_ptid
= inferior_ptid
;
7430 /* A process exit. Invalidate our notion of current thread. */
7431 record_currthread (rs
, minus_one_ptid
);
7436 /* Wait until the remote machine stops, then return, storing status in
7437 STATUS just as `wait' would. */
7440 remote_wait (struct target_ops
*ops
,
7441 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7445 if (target_is_non_stop_p ())
7446 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7448 event_ptid
= remote_wait_as (ptid
, status
, options
);
7450 if (target_is_async_p ())
7452 /* If there are are events left in the queue tell the event loop
7454 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7455 mark_async_event_handler (remote_async_inferior_event_token
);
7461 /* Fetch a single register using a 'p' packet. */
7464 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7466 struct gdbarch
*gdbarch
= regcache
->arch ();
7467 struct remote_state
*rs
= get_remote_state ();
7469 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7472 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7475 if (reg
->pnum
== -1)
7480 p
+= hexnumstr (p
, reg
->pnum
);
7483 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7487 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7491 case PACKET_UNKNOWN
:
7494 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7495 gdbarch_register_name (regcache
->arch (),
7500 /* If this register is unfetchable, tell the regcache. */
7503 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7507 /* Otherwise, parse and supply the value. */
7513 error (_("fetch_register_using_p: early buf termination"));
7515 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7518 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7522 /* Fetch the registers included in the target's 'g' packet. */
7525 send_g_packet (void)
7527 struct remote_state
*rs
= get_remote_state ();
7530 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7531 remote_send (&rs
->buf
, &rs
->buf_size
);
7533 /* We can get out of synch in various cases. If the first character
7534 in the buffer is not a hex character, assume that has happened
7535 and try to fetch another packet to read. */
7536 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7537 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7538 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7539 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7542 fprintf_unfiltered (gdb_stdlog
,
7543 "Bad register packet; fetching a new packet\n");
7544 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7547 buf_len
= strlen (rs
->buf
);
7549 /* Sanity check the received packet. */
7550 if (buf_len
% 2 != 0)
7551 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7557 process_g_packet (struct regcache
*regcache
)
7559 struct gdbarch
*gdbarch
= regcache
->arch ();
7560 struct remote_state
*rs
= get_remote_state ();
7561 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7566 buf_len
= strlen (rs
->buf
);
7568 /* Further sanity checks, with knowledge of the architecture. */
7569 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7570 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7571 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
7573 /* Save the size of the packet sent to us by the target. It is used
7574 as a heuristic when determining the max size of packets that the
7575 target can safely receive. */
7576 if (rsa
->actual_register_packet_size
== 0)
7577 rsa
->actual_register_packet_size
= buf_len
;
7579 /* If this is smaller than we guessed the 'g' packet would be,
7580 update our records. A 'g' reply that doesn't include a register's
7581 value implies either that the register is not available, or that
7582 the 'p' packet must be used. */
7583 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7585 long sizeof_g_packet
= buf_len
/ 2;
7587 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7589 long offset
= rsa
->regs
[i
].offset
;
7590 long reg_size
= register_size (gdbarch
, i
);
7592 if (rsa
->regs
[i
].pnum
== -1)
7595 if (offset
>= sizeof_g_packet
)
7596 rsa
->regs
[i
].in_g_packet
= 0;
7597 else if (offset
+ reg_size
> sizeof_g_packet
)
7598 error (_("Truncated register %d in remote 'g' packet"), i
);
7600 rsa
->regs
[i
].in_g_packet
= 1;
7603 /* Looks valid enough, we can assume this is the correct length
7604 for a 'g' packet. It's important not to adjust
7605 rsa->sizeof_g_packet if we have truncated registers otherwise
7606 this "if" won't be run the next time the method is called
7607 with a packet of the same size and one of the internal errors
7608 below will trigger instead. */
7609 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7612 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7614 /* Unimplemented registers read as all bits zero. */
7615 memset (regs
, 0, rsa
->sizeof_g_packet
);
7617 /* Reply describes registers byte by byte, each byte encoded as two
7618 hex characters. Suck them all up, then supply them to the
7619 register cacheing/storage mechanism. */
7622 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7624 if (p
[0] == 0 || p
[1] == 0)
7625 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7626 internal_error (__FILE__
, __LINE__
,
7627 _("unexpected end of 'g' packet reply"));
7629 if (p
[0] == 'x' && p
[1] == 'x')
7630 regs
[i
] = 0; /* 'x' */
7632 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7636 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7638 struct packet_reg
*r
= &rsa
->regs
[i
];
7639 long reg_size
= register_size (gdbarch
, i
);
7643 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7644 /* This shouldn't happen - we adjusted in_g_packet above. */
7645 internal_error (__FILE__
, __LINE__
,
7646 _("unexpected end of 'g' packet reply"));
7647 else if (rs
->buf
[r
->offset
* 2] == 'x')
7649 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7650 /* The register isn't available, mark it as such (at
7651 the same time setting the value to zero). */
7652 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7655 regcache_raw_supply (regcache
, r
->regnum
,
7662 fetch_registers_using_g (struct regcache
*regcache
)
7665 process_g_packet (regcache
);
7668 /* Make the remote selected traceframe match GDB's selected
7672 set_remote_traceframe (void)
7675 struct remote_state
*rs
= get_remote_state ();
7677 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7680 /* Avoid recursion, remote_trace_find calls us again. */
7681 rs
->remote_traceframe_number
= get_traceframe_number ();
7683 newnum
= target_trace_find (tfind_number
,
7684 get_traceframe_number (), 0, 0, NULL
);
7686 /* Should not happen. If it does, all bets are off. */
7687 if (newnum
!= get_traceframe_number ())
7688 warning (_("could not set remote traceframe"));
7692 remote_fetch_registers (struct target_ops
*ops
,
7693 struct regcache
*regcache
, int regnum
)
7695 struct gdbarch
*gdbarch
= regcache
->arch ();
7696 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7699 set_remote_traceframe ();
7700 set_general_thread (regcache_get_ptid (regcache
));
7704 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7706 gdb_assert (reg
!= NULL
);
7708 /* If this register might be in the 'g' packet, try that first -
7709 we are likely to read more than one register. If this is the
7710 first 'g' packet, we might be overly optimistic about its
7711 contents, so fall back to 'p'. */
7712 if (reg
->in_g_packet
)
7714 fetch_registers_using_g (regcache
);
7715 if (reg
->in_g_packet
)
7719 if (fetch_register_using_p (regcache
, reg
))
7722 /* This register is not available. */
7723 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7728 fetch_registers_using_g (regcache
);
7730 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7731 if (!rsa
->regs
[i
].in_g_packet
)
7732 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7734 /* This register is not available. */
7735 regcache_raw_supply (regcache
, i
, NULL
);
7739 /* Prepare to store registers. Since we may send them all (using a
7740 'G' request), we have to read out the ones we don't want to change
7744 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7746 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7749 /* Make sure the entire registers array is valid. */
7750 switch (packet_support (PACKET_P
))
7752 case PACKET_DISABLE
:
7753 case PACKET_SUPPORT_UNKNOWN
:
7754 /* Make sure all the necessary registers are cached. */
7755 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7756 if (rsa
->regs
[i
].in_g_packet
)
7757 regcache_raw_update (regcache
, rsa
->regs
[i
].regnum
);
7764 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7765 packet was not recognized. */
7768 store_register_using_P (const struct regcache
*regcache
,
7769 struct packet_reg
*reg
)
7771 struct gdbarch
*gdbarch
= regcache
->arch ();
7772 struct remote_state
*rs
= get_remote_state ();
7773 /* Try storing a single register. */
7774 char *buf
= rs
->buf
;
7775 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7778 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7781 if (reg
->pnum
== -1)
7784 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7785 p
= buf
+ strlen (buf
);
7786 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7787 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7789 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7791 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7796 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7797 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7798 case PACKET_UNKNOWN
:
7801 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7805 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7806 contents of the register cache buffer. FIXME: ignores errors. */
7809 store_registers_using_G (const struct regcache
*regcache
)
7811 struct remote_state
*rs
= get_remote_state ();
7812 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7816 /* Extract all the registers in the regcache copying them into a
7821 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7822 memset (regs
, 0, rsa
->sizeof_g_packet
);
7823 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7825 struct packet_reg
*r
= &rsa
->regs
[i
];
7828 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7832 /* Command describes registers byte by byte,
7833 each byte encoded as two hex characters. */
7836 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7838 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7839 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7840 error (_("Could not write registers; remote failure reply '%s'"),
7844 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7845 of the register cache buffer. FIXME: ignores errors. */
7848 remote_store_registers (struct target_ops
*ops
,
7849 struct regcache
*regcache
, int regnum
)
7851 struct gdbarch
*gdbarch
= regcache
->arch ();
7852 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7855 set_remote_traceframe ();
7856 set_general_thread (regcache_get_ptid (regcache
));
7860 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7862 gdb_assert (reg
!= NULL
);
7864 /* Always prefer to store registers using the 'P' packet if
7865 possible; we often change only a small number of registers.
7866 Sometimes we change a larger number; we'd need help from a
7867 higher layer to know to use 'G'. */
7868 if (store_register_using_P (regcache
, reg
))
7871 /* For now, don't complain if we have no way to write the
7872 register. GDB loses track of unavailable registers too
7873 easily. Some day, this may be an error. We don't have
7874 any way to read the register, either... */
7875 if (!reg
->in_g_packet
)
7878 store_registers_using_G (regcache
);
7882 store_registers_using_G (regcache
);
7884 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7885 if (!rsa
->regs
[i
].in_g_packet
)
7886 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7887 /* See above for why we do not issue an error here. */
7892 /* Return the number of hex digits in num. */
7895 hexnumlen (ULONGEST num
)
7899 for (i
= 0; num
!= 0; i
++)
7902 return std::max (i
, 1);
7905 /* Set BUF to the minimum number of hex digits representing NUM. */
7908 hexnumstr (char *buf
, ULONGEST num
)
7910 int len
= hexnumlen (num
);
7912 return hexnumnstr (buf
, num
, len
);
7916 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7919 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7925 for (i
= width
- 1; i
>= 0; i
--)
7927 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7934 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7937 remote_address_masked (CORE_ADDR addr
)
7939 unsigned int address_size
= remote_address_size
;
7941 /* If "remoteaddresssize" was not set, default to target address size. */
7943 address_size
= gdbarch_addr_bit (target_gdbarch ());
7945 if (address_size
> 0
7946 && address_size
< (sizeof (ULONGEST
) * 8))
7948 /* Only create a mask when that mask can safely be constructed
7949 in a ULONGEST variable. */
7952 mask
= (mask
<< address_size
) - 1;
7958 /* Determine whether the remote target supports binary downloading.
7959 This is accomplished by sending a no-op memory write of zero length
7960 to the target at the specified address. It does not suffice to send
7961 the whole packet, since many stubs strip the eighth bit and
7962 subsequently compute a wrong checksum, which causes real havoc with
7965 NOTE: This can still lose if the serial line is not eight-bit
7966 clean. In cases like this, the user should clear "remote
7970 check_binary_download (CORE_ADDR addr
)
7972 struct remote_state
*rs
= get_remote_state ();
7974 switch (packet_support (PACKET_X
))
7976 case PACKET_DISABLE
:
7980 case PACKET_SUPPORT_UNKNOWN
:
7986 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7988 p
+= hexnumstr (p
, (ULONGEST
) 0);
7992 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7993 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7995 if (rs
->buf
[0] == '\0')
7998 fprintf_unfiltered (gdb_stdlog
,
7999 "binary downloading NOT "
8000 "supported by target\n");
8001 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8006 fprintf_unfiltered (gdb_stdlog
,
8007 "binary downloading supported by target\n");
8008 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8015 /* Helper function to resize the payload in order to try to get a good
8016 alignment. We try to write an amount of data such that the next write will
8017 start on an address aligned on REMOTE_ALIGN_WRITES. */
8020 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8022 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8025 /* Write memory data directly to the remote machine.
8026 This does not inform the data cache; the data cache uses this.
8027 HEADER is the starting part of the packet.
8028 MEMADDR is the address in the remote memory space.
8029 MYADDR is the address of the buffer in our space.
8030 LEN_UNITS is the number of addressable units to write.
8031 UNIT_SIZE is the length in bytes of an addressable unit.
8032 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8033 should send data as binary ('X'), or hex-encoded ('M').
8035 The function creates packet of the form
8036 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8038 where encoding of <DATA> is terminated by PACKET_FORMAT.
8040 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8043 Return the transferred status, error or OK (an
8044 'enum target_xfer_status' value). Save the number of addressable units
8045 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8047 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8048 exchange between gdb and the stub could look like (?? in place of the
8054 -> $M1000,3:eeeeffffeeee#??
8058 <- eeeeffffeeeedddd */
8060 static enum target_xfer_status
8061 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8062 const gdb_byte
*myaddr
, ULONGEST len_units
,
8063 int unit_size
, ULONGEST
*xfered_len_units
,
8064 char packet_format
, int use_length
)
8066 struct remote_state
*rs
= get_remote_state ();
8072 int payload_capacity_bytes
;
8073 int payload_length_bytes
;
8075 if (packet_format
!= 'X' && packet_format
!= 'M')
8076 internal_error (__FILE__
, __LINE__
,
8077 _("remote_write_bytes_aux: bad packet format"));
8080 return TARGET_XFER_EOF
;
8082 payload_capacity_bytes
= get_memory_write_packet_size ();
8084 /* The packet buffer will be large enough for the payload;
8085 get_memory_packet_size ensures this. */
8088 /* Compute the size of the actual payload by subtracting out the
8089 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8091 payload_capacity_bytes
-= strlen ("$,:#NN");
8093 /* The comma won't be used. */
8094 payload_capacity_bytes
+= 1;
8095 payload_capacity_bytes
-= strlen (header
);
8096 payload_capacity_bytes
-= hexnumlen (memaddr
);
8098 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8100 strcat (rs
->buf
, header
);
8101 p
= rs
->buf
+ strlen (header
);
8103 /* Compute a best guess of the number of bytes actually transfered. */
8104 if (packet_format
== 'X')
8106 /* Best guess at number of bytes that will fit. */
8107 todo_units
= std::min (len_units
,
8108 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8110 payload_capacity_bytes
-= hexnumlen (todo_units
);
8111 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8115 /* Number of bytes that will fit. */
8117 = std::min (len_units
,
8118 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8120 payload_capacity_bytes
-= hexnumlen (todo_units
);
8121 todo_units
= std::min (todo_units
,
8122 (payload_capacity_bytes
/ unit_size
) / 2);
8125 if (todo_units
<= 0)
8126 internal_error (__FILE__
, __LINE__
,
8127 _("minimum packet size too small to write data"));
8129 /* If we already need another packet, then try to align the end
8130 of this packet to a useful boundary. */
8131 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8132 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8134 /* Append "<memaddr>". */
8135 memaddr
= remote_address_masked (memaddr
);
8136 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8143 /* Append the length and retain its location and size. It may need to be
8144 adjusted once the packet body has been created. */
8146 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8154 /* Append the packet body. */
8155 if (packet_format
== 'X')
8157 /* Binary mode. Send target system values byte by byte, in
8158 increasing byte addresses. Only escape certain critical
8160 payload_length_bytes
=
8161 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8162 &units_written
, payload_capacity_bytes
);
8164 /* If not all TODO units fit, then we'll need another packet. Make
8165 a second try to keep the end of the packet aligned. Don't do
8166 this if the packet is tiny. */
8167 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8171 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8173 if (new_todo_units
!= units_written
)
8174 payload_length_bytes
=
8175 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8176 (gdb_byte
*) p
, &units_written
,
8177 payload_capacity_bytes
);
8180 p
+= payload_length_bytes
;
8181 if (use_length
&& units_written
< todo_units
)
8183 /* Escape chars have filled up the buffer prematurely,
8184 and we have actually sent fewer units than planned.
8185 Fix-up the length field of the packet. Use the same
8186 number of characters as before. */
8187 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8189 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8194 /* Normal mode: Send target system values byte by byte, in
8195 increasing byte addresses. Each byte is encoded as a two hex
8197 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8198 units_written
= todo_units
;
8201 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8202 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8204 if (rs
->buf
[0] == 'E')
8205 return TARGET_XFER_E_IO
;
8207 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8208 send fewer units than we'd planned. */
8209 *xfered_len_units
= (ULONGEST
) units_written
;
8210 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8213 /* Write memory data directly to the remote machine.
8214 This does not inform the data cache; the data cache uses this.
8215 MEMADDR is the address in the remote memory space.
8216 MYADDR is the address of the buffer in our space.
8217 LEN is the number of bytes.
8219 Return the transferred status, error or OK (an
8220 'enum target_xfer_status' value). Save the number of bytes
8221 transferred in *XFERED_LEN. Only transfer a single packet. */
8223 static enum target_xfer_status
8224 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8225 int unit_size
, ULONGEST
*xfered_len
)
8227 const char *packet_format
= NULL
;
8229 /* Check whether the target supports binary download. */
8230 check_binary_download (memaddr
);
8232 switch (packet_support (PACKET_X
))
8235 packet_format
= "X";
8237 case PACKET_DISABLE
:
8238 packet_format
= "M";
8240 case PACKET_SUPPORT_UNKNOWN
:
8241 internal_error (__FILE__
, __LINE__
,
8242 _("remote_write_bytes: bad internal state"));
8244 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8247 return remote_write_bytes_aux (packet_format
,
8248 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8249 packet_format
[0], 1);
8252 /* Read memory data directly from the remote machine.
8253 This does not use the data cache; the data cache uses this.
8254 MEMADDR is the address in the remote memory space.
8255 MYADDR is the address of the buffer in our space.
8256 LEN_UNITS is the number of addressable memory units to read..
8257 UNIT_SIZE is the length in bytes of an addressable unit.
8259 Return the transferred status, error or OK (an
8260 'enum target_xfer_status' value). Save the number of bytes
8261 transferred in *XFERED_LEN_UNITS.
8263 See the comment of remote_write_bytes_aux for an example of
8264 memory read/write exchange between gdb and the stub. */
8266 static enum target_xfer_status
8267 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8268 int unit_size
, ULONGEST
*xfered_len_units
)
8270 struct remote_state
*rs
= get_remote_state ();
8271 int buf_size_bytes
; /* Max size of packet output buffer. */
8276 buf_size_bytes
= get_memory_read_packet_size ();
8277 /* The packet buffer will be large enough for the payload;
8278 get_memory_packet_size ensures this. */
8280 /* Number of units that will fit. */
8281 todo_units
= std::min (len_units
,
8282 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8284 /* Construct "m"<memaddr>","<len>". */
8285 memaddr
= remote_address_masked (memaddr
);
8288 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8290 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8293 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8294 if (rs
->buf
[0] == 'E'
8295 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8296 && rs
->buf
[3] == '\0')
8297 return TARGET_XFER_E_IO
;
8298 /* Reply describes memory byte by byte, each byte encoded as two hex
8301 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8302 /* Return what we have. Let higher layers handle partial reads. */
8303 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8304 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8307 /* Using the set of read-only target sections of remote, read live
8310 For interface/parameters/return description see target.h,
8313 static enum target_xfer_status
8314 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8315 ULONGEST memaddr
, ULONGEST len
,
8316 int unit_size
, ULONGEST
*xfered_len
)
8318 struct target_section
*secp
;
8319 struct target_section_table
*table
;
8321 secp
= target_section_by_addr (ops
, memaddr
);
8323 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8324 secp
->the_bfd_section
)
8327 struct target_section
*p
;
8328 ULONGEST memend
= memaddr
+ len
;
8330 table
= target_get_section_table (ops
);
8332 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8334 if (memaddr
>= p
->addr
)
8336 if (memend
<= p
->endaddr
)
8338 /* Entire transfer is within this section. */
8339 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8342 else if (memaddr
>= p
->endaddr
)
8344 /* This section ends before the transfer starts. */
8349 /* This section overlaps the transfer. Just do half. */
8350 len
= p
->endaddr
- memaddr
;
8351 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8358 return TARGET_XFER_EOF
;
8361 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8362 first if the requested memory is unavailable in traceframe.
8363 Otherwise, fall back to remote_read_bytes_1. */
8365 static enum target_xfer_status
8366 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8367 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8368 ULONGEST
*xfered_len
)
8371 return TARGET_XFER_EOF
;
8373 if (get_traceframe_number () != -1)
8375 std::vector
<mem_range
> available
;
8377 /* If we fail to get the set of available memory, then the
8378 target does not support querying traceframe info, and so we
8379 attempt reading from the traceframe anyway (assuming the
8380 target implements the old QTro packet then). */
8381 if (traceframe_available_memory (&available
, memaddr
, len
))
8383 if (available
.empty () || available
[0].start
!= memaddr
)
8385 enum target_xfer_status res
;
8387 /* Don't read into the traceframe's available
8389 if (!available
.empty ())
8391 LONGEST oldlen
= len
;
8393 len
= available
[0].start
- memaddr
;
8394 gdb_assert (len
<= oldlen
);
8397 /* This goes through the topmost target again. */
8398 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8399 len
, unit_size
, xfered_len
);
8400 if (res
== TARGET_XFER_OK
)
8401 return TARGET_XFER_OK
;
8404 /* No use trying further, we know some memory starting
8405 at MEMADDR isn't available. */
8407 return (*xfered_len
!= 0) ?
8408 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8412 /* Don't try to read more than how much is available, in
8413 case the target implements the deprecated QTro packet to
8414 cater for older GDBs (the target's knowledge of read-only
8415 sections may be outdated by now). */
8416 len
= available
[0].length
;
8420 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8425 /* Sends a packet with content determined by the printf format string
8426 FORMAT and the remaining arguments, then gets the reply. Returns
8427 whether the packet was a success, a failure, or unknown. */
8429 static enum packet_result
remote_send_printf (const char *format
, ...)
8430 ATTRIBUTE_PRINTF (1, 2);
8432 static enum packet_result
8433 remote_send_printf (const char *format
, ...)
8435 struct remote_state
*rs
= get_remote_state ();
8436 int max_size
= get_remote_packet_size ();
8439 va_start (ap
, format
);
8442 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8443 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8445 if (putpkt (rs
->buf
) < 0)
8446 error (_("Communication problem with target."));
8449 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8451 return packet_check_result (rs
->buf
);
8454 /* Flash writing can take quite some time. We'll set
8455 effectively infinite timeout for flash operations.
8456 In future, we'll need to decide on a better approach. */
8457 static const int remote_flash_timeout
= 1000;
8460 remote_flash_erase (struct target_ops
*ops
,
8461 ULONGEST address
, LONGEST length
)
8463 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8464 enum packet_result ret
;
8465 scoped_restore restore_timeout
8466 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8468 ret
= remote_send_printf ("vFlashErase:%s,%s",
8469 phex (address
, addr_size
),
8473 case PACKET_UNKNOWN
:
8474 error (_("Remote target does not support flash erase"));
8476 error (_("Error erasing flash with vFlashErase packet"));
8482 static enum target_xfer_status
8483 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8484 ULONGEST length
, ULONGEST
*xfered_len
,
8485 const gdb_byte
*data
)
8487 scoped_restore restore_timeout
8488 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8489 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8494 remote_flash_done (struct target_ops
*ops
)
8498 scoped_restore restore_timeout
8499 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8501 ret
= remote_send_printf ("vFlashDone");
8505 case PACKET_UNKNOWN
:
8506 error (_("Remote target does not support vFlashDone"));
8508 error (_("Error finishing flash operation"));
8515 remote_files_info (struct target_ops
*ignore
)
8517 puts_filtered ("Debugging a target over a serial line.\n");
8520 /* Stuff for dealing with the packets which are part of this protocol.
8521 See comment at top of file for details. */
8523 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8524 error to higher layers. Called when a serial error is detected.
8525 The exception message is STRING, followed by a colon and a blank,
8526 the system error message for errno at function entry and final dot
8527 for output compatibility with throw_perror_with_name. */
8530 unpush_and_perror (const char *string
)
8532 int saved_errno
= errno
;
8534 remote_unpush_target ();
8535 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8536 safe_strerror (saved_errno
));
8539 /* Read a single character from the remote end. The current quit
8540 handler is overridden to avoid quitting in the middle of packet
8541 sequence, as that would break communication with the remote server.
8542 See remote_serial_quit_handler for more detail. */
8545 readchar (int timeout
)
8548 struct remote_state
*rs
= get_remote_state ();
8551 scoped_restore restore_quit
8552 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8554 rs
->got_ctrlc_during_io
= 0;
8556 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8558 if (rs
->got_ctrlc_during_io
)
8565 switch ((enum serial_rc
) ch
)
8568 remote_unpush_target ();
8569 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8572 unpush_and_perror (_("Remote communication error. "
8573 "Target disconnected."));
8575 case SERIAL_TIMEOUT
:
8581 /* Wrapper for serial_write that closes the target and throws if
8582 writing fails. The current quit handler is overridden to avoid
8583 quitting in the middle of packet sequence, as that would break
8584 communication with the remote server. See
8585 remote_serial_quit_handler for more detail. */
8588 remote_serial_write (const char *str
, int len
)
8590 struct remote_state
*rs
= get_remote_state ();
8592 scoped_restore restore_quit
8593 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8595 rs
->got_ctrlc_during_io
= 0;
8597 if (serial_write (rs
->remote_desc
, str
, len
))
8599 unpush_and_perror (_("Remote communication error. "
8600 "Target disconnected."));
8603 if (rs
->got_ctrlc_during_io
)
8607 /* Send the command in *BUF to the remote machine, and read the reply
8608 into *BUF. Report an error if we get an error reply. Resize
8609 *BUF using xrealloc if necessary to hold the result, and update
8613 remote_send (char **buf
,
8617 getpkt (buf
, sizeof_buf
, 0);
8619 if ((*buf
)[0] == 'E')
8620 error (_("Remote failure reply: %s"), *buf
);
8623 /* Return a string representing an escaped version of BUF, of len N.
8624 E.g. \n is converted to \\n, \t to \\t, etc. */
8627 escape_buffer (const char *buf
, int n
)
8631 stb
.putstrn (buf
, n
, '\\');
8632 return std::move (stb
.string ());
8635 /* Display a null-terminated packet on stdout, for debugging, using C
8639 print_packet (const char *buf
)
8641 puts_filtered ("\"");
8642 fputstr_filtered (buf
, '"', gdb_stdout
);
8643 puts_filtered ("\"");
8647 putpkt (const char *buf
)
8649 return putpkt_binary (buf
, strlen (buf
));
8652 /* Send a packet to the remote machine, with error checking. The data
8653 of the packet is in BUF. The string in BUF can be at most
8654 get_remote_packet_size () - 5 to account for the $, # and checksum,
8655 and for a possible /0 if we are debugging (remote_debug) and want
8656 to print the sent packet as a string. */
8659 putpkt_binary (const char *buf
, int cnt
)
8661 struct remote_state
*rs
= get_remote_state ();
8663 unsigned char csum
= 0;
8664 gdb::def_vector
<char> data (cnt
+ 6);
8665 char *buf2
= data
.data ();
8671 /* Catch cases like trying to read memory or listing threads while
8672 we're waiting for a stop reply. The remote server wouldn't be
8673 ready to handle this request, so we'd hang and timeout. We don't
8674 have to worry about this in synchronous mode, because in that
8675 case it's not possible to issue a command while the target is
8676 running. This is not a problem in non-stop mode, because in that
8677 case, the stub is always ready to process serial input. */
8678 if (!target_is_non_stop_p ()
8679 && target_is_async_p ()
8680 && rs
->waiting_for_stop_reply
)
8682 error (_("Cannot execute this command while the target is running.\n"
8683 "Use the \"interrupt\" command to stop the target\n"
8684 "and then try again."));
8687 /* We're sending out a new packet. Make sure we don't look at a
8688 stale cached response. */
8689 rs
->cached_wait_status
= 0;
8691 /* Copy the packet into buffer BUF2, encapsulating it
8692 and giving it a checksum. */
8697 for (i
= 0; i
< cnt
; i
++)
8703 *p
++ = tohex ((csum
>> 4) & 0xf);
8704 *p
++ = tohex (csum
& 0xf);
8706 /* Send it over and over until we get a positive ack. */
8710 int started_error_output
= 0;
8716 int len
= (int) (p
- buf2
);
8719 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8721 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8723 if (len
> REMOTE_DEBUG_MAX_CHAR
)
8724 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
8725 len
- REMOTE_DEBUG_MAX_CHAR
);
8727 fprintf_unfiltered (gdb_stdlog
, "...");
8729 gdb_flush (gdb_stdlog
);
8731 remote_serial_write (buf2
, p
- buf2
);
8733 /* If this is a no acks version of the remote protocol, send the
8734 packet and move on. */
8738 /* Read until either a timeout occurs (-2) or '+' is read.
8739 Handle any notification that arrives in the mean time. */
8742 ch
= readchar (remote_timeout
);
8750 case SERIAL_TIMEOUT
:
8753 if (started_error_output
)
8755 putchar_unfiltered ('\n');
8756 started_error_output
= 0;
8765 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8769 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8771 case SERIAL_TIMEOUT
:
8775 break; /* Retransmit buffer. */
8779 fprintf_unfiltered (gdb_stdlog
,
8780 "Packet instead of Ack, ignoring it\n");
8781 /* It's probably an old response sent because an ACK
8782 was lost. Gobble up the packet and ack it so it
8783 doesn't get retransmitted when we resend this
8786 remote_serial_write ("+", 1);
8787 continue; /* Now, go look for +. */
8794 /* If we got a notification, handle it, and go back to looking
8796 /* We've found the start of a notification. Now
8797 collect the data. */
8798 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8803 std::string str
= escape_buffer (rs
->buf
, val
);
8805 fprintf_unfiltered (gdb_stdlog
,
8806 " Notification received: %s\n",
8809 handle_notification (rs
->notif_state
, rs
->buf
);
8810 /* We're in sync now, rewait for the ack. */
8817 if (!started_error_output
)
8819 started_error_output
= 1;
8820 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8822 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8823 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8832 if (!started_error_output
)
8834 started_error_output
= 1;
8835 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8837 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8841 break; /* Here to retransmit. */
8845 /* This is wrong. If doing a long backtrace, the user should be
8846 able to get out next time we call QUIT, without anything as
8847 violent as interrupt_query. If we want to provide a way out of
8848 here without getting to the next QUIT, it should be based on
8849 hitting ^C twice as in remote_wait. */
8861 /* Come here after finding the start of a frame when we expected an
8862 ack. Do our best to discard the rest of this packet. */
8871 c
= readchar (remote_timeout
);
8874 case SERIAL_TIMEOUT
:
8875 /* Nothing we can do. */
8878 /* Discard the two bytes of checksum and stop. */
8879 c
= readchar (remote_timeout
);
8881 c
= readchar (remote_timeout
);
8884 case '*': /* Run length encoding. */
8885 /* Discard the repeat count. */
8886 c
= readchar (remote_timeout
);
8891 /* A regular character. */
8897 /* Come here after finding the start of the frame. Collect the rest
8898 into *BUF, verifying the checksum, length, and handling run-length
8899 compression. NUL terminate the buffer. If there is not enough room,
8900 expand *BUF using xrealloc.
8902 Returns -1 on error, number of characters in buffer (ignoring the
8903 trailing NULL) on success. (could be extended to return one of the
8904 SERIAL status indications). */
8907 read_frame (char **buf_p
,
8914 struct remote_state
*rs
= get_remote_state ();
8921 c
= readchar (remote_timeout
);
8924 case SERIAL_TIMEOUT
:
8926 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8930 fputs_filtered ("Saw new packet start in middle of old one\n",
8932 return -1; /* Start a new packet, count retries. */
8935 unsigned char pktcsum
;
8941 check_0
= readchar (remote_timeout
);
8943 check_1
= readchar (remote_timeout
);
8945 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8948 fputs_filtered ("Timeout in checksum, retrying\n",
8952 else if (check_0
< 0 || check_1
< 0)
8955 fputs_filtered ("Communication error in checksum\n",
8960 /* Don't recompute the checksum; with no ack packets we
8961 don't have any way to indicate a packet retransmission
8966 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
8967 if (csum
== pktcsum
)
8972 std::string str
= escape_buffer (buf
, bc
);
8974 fprintf_unfiltered (gdb_stdlog
,
8975 "Bad checksum, sentsum=0x%x, "
8976 "csum=0x%x, buf=%s\n",
8977 pktcsum
, csum
, str
.c_str ());
8979 /* Number of characters in buffer ignoring trailing
8983 case '*': /* Run length encoding. */
8988 c
= readchar (remote_timeout
);
8990 repeat
= c
- ' ' + 3; /* Compute repeat count. */
8992 /* The character before ``*'' is repeated. */
8994 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
8996 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
8998 /* Make some more room in the buffer. */
8999 *sizeof_buf
+= repeat
;
9000 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9004 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9010 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9014 if (bc
>= *sizeof_buf
- 1)
9016 /* Make some more room in the buffer. */
9018 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9029 /* Read a packet from the remote machine, with error checking, and
9030 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9031 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9032 rather than timing out; this is used (in synchronous mode) to wait
9033 for a target that is is executing user code to stop. */
9034 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9035 don't have to change all the calls to getpkt to deal with the
9036 return value, because at the moment I don't know what the right
9037 thing to do it for those. */
9043 getpkt_sane (buf
, sizeof_buf
, forever
);
9047 /* Read a packet from the remote machine, with error checking, and
9048 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9049 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9050 rather than timing out; this is used (in synchronous mode) to wait
9051 for a target that is is executing user code to stop. If FOREVER ==
9052 0, this function is allowed to time out gracefully and return an
9053 indication of this to the caller. Otherwise return the number of
9054 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9055 enough reason to return to the caller. *IS_NOTIF is an output
9056 boolean that indicates whether *BUF holds a notification or not
9057 (a regular packet). */
9060 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9061 int expecting_notif
, int *is_notif
)
9063 struct remote_state
*rs
= get_remote_state ();
9069 /* We're reading a new response. Make sure we don't look at a
9070 previously cached response. */
9071 rs
->cached_wait_status
= 0;
9073 strcpy (*buf
, "timeout");
9076 timeout
= watchdog
> 0 ? watchdog
: -1;
9077 else if (expecting_notif
)
9078 timeout
= 0; /* There should already be a char in the buffer. If
9081 timeout
= remote_timeout
;
9085 /* Process any number of notifications, and then return when
9089 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9091 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9093 /* This can loop forever if the remote side sends us
9094 characters continuously, but if it pauses, we'll get
9095 SERIAL_TIMEOUT from readchar because of timeout. Then
9096 we'll count that as a retry.
9098 Note that even when forever is set, we will only wait
9099 forever prior to the start of a packet. After that, we
9100 expect characters to arrive at a brisk pace. They should
9101 show up within remote_timeout intervals. */
9103 c
= readchar (timeout
);
9104 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9106 if (c
== SERIAL_TIMEOUT
)
9108 if (expecting_notif
)
9109 return -1; /* Don't complain, it's normal to not get
9110 anything in this case. */
9112 if (forever
) /* Watchdog went off? Kill the target. */
9114 remote_unpush_target ();
9115 throw_error (TARGET_CLOSE_ERROR
,
9116 _("Watchdog timeout has expired. "
9117 "Target detached."));
9120 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9124 /* We've found the start of a packet or notification.
9125 Now collect the data. */
9126 val
= read_frame (buf
, sizeof_buf
);
9131 remote_serial_write ("-", 1);
9134 if (tries
> MAX_TRIES
)
9136 /* We have tried hard enough, and just can't receive the
9137 packet/notification. Give up. */
9138 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9140 /* Skip the ack char if we're in no-ack mode. */
9141 if (!rs
->noack_mode
)
9142 remote_serial_write ("+", 1);
9146 /* If we got an ordinary packet, return that to our caller. */
9152 = escape_buffer (*buf
,
9153 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9155 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9158 if (val
> REMOTE_DEBUG_MAX_CHAR
)
9159 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9160 val
- REMOTE_DEBUG_MAX_CHAR
);
9162 fprintf_unfiltered (gdb_stdlog
, "\n");
9165 /* Skip the ack char if we're in no-ack mode. */
9166 if (!rs
->noack_mode
)
9167 remote_serial_write ("+", 1);
9168 if (is_notif
!= NULL
)
9173 /* If we got a notification, handle it, and go back to looking
9177 gdb_assert (c
== '%');
9181 std::string str
= escape_buffer (*buf
, val
);
9183 fprintf_unfiltered (gdb_stdlog
,
9184 " Notification received: %s\n",
9187 if (is_notif
!= NULL
)
9190 handle_notification (rs
->notif_state
, *buf
);
9192 /* Notifications require no acknowledgement. */
9194 if (expecting_notif
)
9201 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9203 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9207 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9210 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9214 /* Check whether EVENT is a fork event for the process specified
9215 by the pid passed in DATA, and if it is, kill the fork child. */
9218 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9219 QUEUE_ITER (stop_reply_p
) *iter
,
9223 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9224 int parent_pid
= *(int *) param
->input
;
9226 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9228 struct remote_state
*rs
= get_remote_state ();
9229 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9232 res
= remote_vkill (child_pid
, rs
);
9234 error (_("Can't kill fork child process %d"), child_pid
);
9240 /* Kill any new fork children of process PID that haven't been
9241 processed by follow_fork. */
9244 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9246 struct thread_info
*thread
;
9247 struct notif_client
*notif
= ¬if_client_stop
;
9248 struct queue_iter_param param
;
9250 /* Kill the fork child threads of any threads in process PID
9251 that are stopped at a fork event. */
9252 ALL_NON_EXITED_THREADS (thread
)
9254 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9256 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9258 struct remote_state
*rs
= get_remote_state ();
9259 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9262 res
= remote_vkill (child_pid
, rs
);
9264 error (_("Can't kill fork child process %d"), child_pid
);
9268 /* Check for any pending fork events (not reported or processed yet)
9269 in process PID and kill those fork child threads as well. */
9270 remote_notif_get_pending_events (notif
);
9272 param
.output
= NULL
;
9273 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9274 kill_child_of_pending_fork
, ¶m
);
9278 /* Target hook to kill the current inferior. */
9281 remote_kill (struct target_ops
*ops
)
9284 int pid
= ptid_get_pid (inferior_ptid
);
9285 struct remote_state
*rs
= get_remote_state ();
9287 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9289 /* If we're stopped while forking and we haven't followed yet,
9290 kill the child task. We need to do this before killing the
9291 parent task because if this is a vfork then the parent will
9293 kill_new_fork_children (pid
, rs
);
9295 res
= remote_vkill (pid
, rs
);
9298 target_mourn_inferior (inferior_ptid
);
9303 /* If we are in 'target remote' mode and we are killing the only
9304 inferior, then we will tell gdbserver to exit and unpush the
9306 if (res
== -1 && !remote_multi_process_p (rs
)
9307 && number_of_live_inferiors () == 1)
9311 /* We've killed the remote end, we get to mourn it. If we are
9312 not in extended mode, mourning the inferior also unpushes
9313 remote_ops from the target stack, which closes the remote
9315 target_mourn_inferior (inferior_ptid
);
9320 error (_("Can't kill process"));
9323 /* Send a kill request to the target using the 'vKill' packet. */
9326 remote_vkill (int pid
, struct remote_state
*rs
)
9328 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9331 /* Tell the remote target to detach. */
9332 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9334 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9336 switch (packet_ok (rs
->buf
,
9337 &remote_protocol_packets
[PACKET_vKill
]))
9343 case PACKET_UNKNOWN
:
9346 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9350 /* Send a kill request to the target using the 'k' packet. */
9353 remote_kill_k (void)
9355 /* Catch errors so the user can quit from gdb even when we
9356 aren't on speaking terms with the remote system. */
9361 CATCH (ex
, RETURN_MASK_ERROR
)
9363 if (ex
.error
== TARGET_CLOSE_ERROR
)
9365 /* If we got an (EOF) error that caused the target
9366 to go away, then we're done, that's what we wanted.
9367 "k" is susceptible to cause a premature EOF, given
9368 that the remote server isn't actually required to
9369 reply to "k", and it can happen that it doesn't
9370 even get to reply ACK to the "k". */
9374 /* Otherwise, something went wrong. We didn't actually kill
9375 the target. Just propagate the exception, and let the
9376 user or higher layers decide what to do. */
9377 throw_exception (ex
);
9383 remote_mourn (struct target_ops
*target
)
9385 struct remote_state
*rs
= get_remote_state ();
9387 /* In 'target remote' mode with one inferior, we close the connection. */
9388 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9390 unpush_target (target
);
9392 /* remote_close takes care of doing most of the clean up. */
9393 generic_mourn_inferior ();
9397 /* In case we got here due to an error, but we're going to stay
9399 rs
->waiting_for_stop_reply
= 0;
9401 /* If the current general thread belonged to the process we just
9402 detached from or has exited, the remote side current general
9403 thread becomes undefined. Considering a case like this:
9405 - We just got here due to a detach.
9406 - The process that we're detaching from happens to immediately
9407 report a global breakpoint being hit in non-stop mode, in the
9408 same thread we had selected before.
9409 - GDB attaches to this process again.
9410 - This event happens to be the next event we handle.
9412 GDB would consider that the current general thread didn't need to
9413 be set on the stub side (with Hg), since for all it knew,
9414 GENERAL_THREAD hadn't changed.
9416 Notice that although in all-stop mode, the remote server always
9417 sets the current thread to the thread reporting the stop event,
9418 that doesn't happen in non-stop mode; in non-stop, the stub *must
9419 not* change the current thread when reporting a breakpoint hit,
9420 due to the decoupling of event reporting and event handling.
9422 To keep things simple, we always invalidate our notion of the
9424 record_currthread (rs
, minus_one_ptid
);
9426 /* Call common code to mark the inferior as not running. */
9427 generic_mourn_inferior ();
9429 if (!have_inferiors ())
9431 if (!remote_multi_process_p (rs
))
9433 /* Check whether the target is running now - some remote stubs
9434 automatically restart after kill. */
9436 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9438 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9440 /* Assume that the target has been restarted. Set
9441 inferior_ptid so that bits of core GDB realizes
9442 there's something here, e.g., so that the user can
9443 say "kill" again. */
9444 inferior_ptid
= magic_null_ptid
;
9451 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9453 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9457 extended_remote_disable_randomization (int val
)
9459 struct remote_state
*rs
= get_remote_state ();
9462 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9465 reply
= remote_get_noisy_reply ();
9467 error (_("Target does not support QDisableRandomization."));
9468 if (strcmp (reply
, "OK") != 0)
9469 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9473 extended_remote_run (const std::string
&args
)
9475 struct remote_state
*rs
= get_remote_state ();
9477 const char *remote_exec_file
= get_remote_exec_file ();
9479 /* If the user has disabled vRun support, or we have detected that
9480 support is not available, do not try it. */
9481 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9484 strcpy (rs
->buf
, "vRun;");
9485 len
= strlen (rs
->buf
);
9487 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9488 error (_("Remote file name too long for run packet"));
9489 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9490 strlen (remote_exec_file
));
9496 gdb_argv
argv (args
.c_str ());
9497 for (i
= 0; argv
[i
] != NULL
; i
++)
9499 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9500 error (_("Argument list too long for run packet"));
9501 rs
->buf
[len
++] = ';';
9502 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9507 rs
->buf
[len
++] = '\0';
9510 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9512 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9515 /* We have a wait response. All is well. */
9517 case PACKET_UNKNOWN
:
9520 if (remote_exec_file
[0] == '\0')
9521 error (_("Running the default executable on the remote target failed; "
9522 "try \"set remote exec-file\"?"));
9524 error (_("Running \"%s\" on the remote target failed"),
9527 gdb_assert_not_reached (_("bad switch"));
9531 /* Helper function to send set/unset environment packets. ACTION is
9532 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9533 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9537 send_environment_packet (struct remote_state
*rs
,
9542 /* Convert the environment variable to an hex string, which
9543 is the best format to be transmitted over the wire. */
9544 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9547 xsnprintf (rs
->buf
, get_remote_packet_size (),
9548 "%s:%s", packet
, encoded_value
.c_str ());
9551 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9552 if (strcmp (rs
->buf
, "OK") != 0)
9553 warning (_("Unable to %s environment variable '%s' on remote."),
9557 /* Helper function to handle the QEnvironment* packets. */
9560 extended_remote_environment_support (struct remote_state
*rs
)
9562 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9564 putpkt ("QEnvironmentReset");
9565 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9566 if (strcmp (rs
->buf
, "OK") != 0)
9567 warning (_("Unable to reset environment on remote."));
9570 gdb_environ
*e
= ¤t_inferior ()->environment
;
9572 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9573 for (const std::string
&el
: e
->user_set_env ())
9574 send_environment_packet (rs
, "set", "QEnvironmentHexEncoded",
9577 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9578 for (const std::string
&el
: e
->user_unset_env ())
9579 send_environment_packet (rs
, "unset", "QEnvironmentUnset", el
.c_str ());
9582 /* Helper function to set the current working directory for the
9583 inferior in the remote target. */
9586 extended_remote_set_inferior_cwd (struct remote_state
*rs
)
9588 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
9590 const char *inferior_cwd
= get_inferior_cwd ();
9592 if (inferior_cwd
!= NULL
)
9594 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
9595 strlen (inferior_cwd
));
9597 xsnprintf (rs
->buf
, get_remote_packet_size (),
9598 "QSetWorkingDir:%s", hexpath
.c_str ());
9602 /* An empty inferior_cwd means that the user wants us to
9603 reset the remote server's inferior's cwd. */
9604 xsnprintf (rs
->buf
, get_remote_packet_size (),
9609 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9610 if (packet_ok (rs
->buf
,
9611 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
9614 Remote replied unexpectedly while setting the inferior's working\n\
9621 /* In the extended protocol we want to be able to do things like
9622 "run" and have them basically work as expected. So we need
9623 a special create_inferior function. We support changing the
9624 executable file and the command line arguments, but not the
9628 extended_remote_create_inferior (struct target_ops
*ops
,
9629 const char *exec_file
,
9630 const std::string
&args
,
9631 char **env
, int from_tty
)
9635 struct remote_state
*rs
= get_remote_state ();
9636 const char *remote_exec_file
= get_remote_exec_file ();
9638 /* If running asynchronously, register the target file descriptor
9639 with the event loop. */
9640 if (target_can_async_p ())
9643 /* Disable address space randomization if requested (and supported). */
9644 if (extended_remote_supports_disable_randomization (ops
))
9645 extended_remote_disable_randomization (disable_randomization
);
9647 /* If startup-with-shell is on, we inform gdbserver to start the
9648 remote inferior using a shell. */
9649 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
9651 xsnprintf (rs
->buf
, get_remote_packet_size (),
9652 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
9654 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9655 if (strcmp (rs
->buf
, "OK") != 0)
9657 Remote replied unexpectedly while setting startup-with-shell: %s"),
9661 extended_remote_environment_support (rs
);
9663 extended_remote_set_inferior_cwd (rs
);
9665 /* Now restart the remote server. */
9666 run_worked
= extended_remote_run (args
) != -1;
9669 /* vRun was not supported. Fail if we need it to do what the
9671 if (remote_exec_file
[0])
9672 error (_("Remote target does not support \"set remote exec-file\""));
9674 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9676 /* Fall back to "R". */
9677 extended_remote_restart ();
9680 if (!have_inferiors ())
9682 /* Clean up from the last time we ran, before we mark the target
9683 running again. This will mark breakpoints uninserted, and
9684 get_offsets may insert breakpoints. */
9685 init_thread_list ();
9686 init_wait_for_inferior ();
9689 /* vRun's success return is a stop reply. */
9690 stop_reply
= run_worked
? rs
->buf
: NULL
;
9691 add_current_inferior_and_thread (stop_reply
);
9693 /* Get updated offsets, if the stub uses qOffsets. */
9698 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9699 the list of conditions (in agent expression bytecode format), if any, the
9700 target needs to evaluate. The output is placed into the packet buffer
9701 started from BUF and ended at BUF_END. */
9704 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9705 struct bp_target_info
*bp_tgt
, char *buf
,
9708 if (bp_tgt
->conditions
.empty ())
9711 buf
+= strlen (buf
);
9712 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9715 /* Send conditions to the target. */
9716 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
9718 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9719 buf
+= strlen (buf
);
9720 for (int i
= 0; i
< aexpr
->len
; ++i
)
9721 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9728 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9729 struct bp_target_info
*bp_tgt
, char *buf
)
9731 if (bp_tgt
->tcommands
.empty ())
9734 buf
+= strlen (buf
);
9736 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9737 buf
+= strlen (buf
);
9739 /* Concatenate all the agent expressions that are commands into the
9741 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
9743 sprintf (buf
, "X%x,", aexpr
->len
);
9744 buf
+= strlen (buf
);
9745 for (int i
= 0; i
< aexpr
->len
; ++i
)
9746 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9751 /* Insert a breakpoint. On targets that have software breakpoint
9752 support, we ask the remote target to do the work; on targets
9753 which don't, we insert a traditional memory breakpoint. */
9756 remote_insert_breakpoint (struct target_ops
*ops
,
9757 struct gdbarch
*gdbarch
,
9758 struct bp_target_info
*bp_tgt
)
9760 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9761 If it succeeds, then set the support to PACKET_ENABLE. If it
9762 fails, and the user has explicitly requested the Z support then
9763 report an error, otherwise, mark it disabled and go on. */
9765 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9767 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9768 struct remote_state
*rs
;
9771 /* Make sure the remote is pointing at the right process, if
9773 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9774 set_general_process ();
9776 rs
= get_remote_state ();
9778 endbuf
= rs
->buf
+ get_remote_packet_size ();
9783 addr
= (ULONGEST
) remote_address_masked (addr
);
9784 p
+= hexnumstr (p
, addr
);
9785 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9787 if (remote_supports_cond_breakpoints (ops
))
9788 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9790 if (remote_can_run_breakpoint_commands (ops
))
9791 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9794 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9796 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9802 case PACKET_UNKNOWN
:
9807 /* If this breakpoint has target-side commands but this stub doesn't
9808 support Z0 packets, throw error. */
9809 if (!bp_tgt
->tcommands
.empty ())
9810 throw_error (NOT_SUPPORTED_ERROR
, _("\
9811 Target doesn't support breakpoints that have target side commands."));
9813 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9817 remote_remove_breakpoint (struct target_ops
*ops
,
9818 struct gdbarch
*gdbarch
,
9819 struct bp_target_info
*bp_tgt
,
9820 enum remove_bp_reason reason
)
9822 CORE_ADDR addr
= bp_tgt
->placed_address
;
9823 struct remote_state
*rs
= get_remote_state ();
9825 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9828 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9830 /* Make sure the remote is pointing at the right process, if
9832 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9833 set_general_process ();
9839 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9840 p
+= hexnumstr (p
, addr
);
9841 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9844 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9846 return (rs
->buf
[0] == 'E');
9849 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9852 static enum Z_packet_type
9853 watchpoint_to_Z_packet (int type
)
9858 return Z_PACKET_WRITE_WP
;
9861 return Z_PACKET_READ_WP
;
9864 return Z_PACKET_ACCESS_WP
;
9867 internal_error (__FILE__
, __LINE__
,
9868 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9873 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9874 enum target_hw_bp_type type
, struct expression
*cond
)
9876 struct remote_state
*rs
= get_remote_state ();
9877 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9879 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9881 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9884 /* Make sure the remote is pointing at the right process, if
9886 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9887 set_general_process ();
9889 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9890 p
= strchr (rs
->buf
, '\0');
9891 addr
= remote_address_masked (addr
);
9892 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9893 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9896 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9898 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9902 case PACKET_UNKNOWN
:
9907 internal_error (__FILE__
, __LINE__
,
9908 _("remote_insert_watchpoint: reached end of function"));
9912 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9913 CORE_ADDR start
, int length
)
9915 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9917 return diff
< length
;
9922 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9923 enum target_hw_bp_type type
, struct expression
*cond
)
9925 struct remote_state
*rs
= get_remote_state ();
9926 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9928 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9930 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9933 /* Make sure the remote is pointing at the right process, if
9935 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9936 set_general_process ();
9938 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9939 p
= strchr (rs
->buf
, '\0');
9940 addr
= remote_address_masked (addr
);
9941 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9942 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9944 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9946 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9949 case PACKET_UNKNOWN
:
9954 internal_error (__FILE__
, __LINE__
,
9955 _("remote_remove_watchpoint: reached end of function"));
9959 int remote_hw_watchpoint_limit
= -1;
9960 int remote_hw_watchpoint_length_limit
= -1;
9961 int remote_hw_breakpoint_limit
= -1;
9964 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9965 CORE_ADDR addr
, int len
)
9967 if (remote_hw_watchpoint_length_limit
== 0)
9969 else if (remote_hw_watchpoint_length_limit
< 0)
9971 else if (len
<= remote_hw_watchpoint_length_limit
)
9978 remote_check_watch_resources (struct target_ops
*self
,
9979 enum bptype type
, int cnt
, int ot
)
9981 if (type
== bp_hardware_breakpoint
)
9983 if (remote_hw_breakpoint_limit
== 0)
9985 else if (remote_hw_breakpoint_limit
< 0)
9987 else if (cnt
<= remote_hw_breakpoint_limit
)
9992 if (remote_hw_watchpoint_limit
== 0)
9994 else if (remote_hw_watchpoint_limit
< 0)
9998 else if (cnt
<= remote_hw_watchpoint_limit
)
10004 /* The to_stopped_by_sw_breakpoint method of target remote. */
10007 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10009 struct thread_info
*thread
= inferior_thread ();
10011 return (thread
->priv
!= NULL
10012 && (get_remote_thread_info (thread
)->stop_reason
10013 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10016 /* The to_supports_stopped_by_sw_breakpoint method of target
10020 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10022 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10025 /* The to_stopped_by_hw_breakpoint method of target remote. */
10028 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10030 struct thread_info
*thread
= inferior_thread ();
10032 return (thread
->priv
!= NULL
10033 && (get_remote_thread_info (thread
)->stop_reason
10034 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10037 /* The to_supports_stopped_by_hw_breakpoint method of target
10041 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10043 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10047 remote_stopped_by_watchpoint (struct target_ops
*ops
)
10049 struct thread_info
*thread
= inferior_thread ();
10051 return (thread
->priv
!= NULL
10052 && (get_remote_thread_info (thread
)->stop_reason
10053 == TARGET_STOPPED_BY_WATCHPOINT
));
10057 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10059 struct thread_info
*thread
= inferior_thread ();
10061 if (thread
->priv
!= NULL
10062 && (get_remote_thread_info (thread
)->stop_reason
10063 == TARGET_STOPPED_BY_WATCHPOINT
))
10065 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10074 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10075 struct bp_target_info
*bp_tgt
)
10077 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10078 struct remote_state
*rs
;
10082 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10085 /* Make sure the remote is pointing at the right process, if
10087 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10088 set_general_process ();
10090 rs
= get_remote_state ();
10092 endbuf
= rs
->buf
+ get_remote_packet_size ();
10098 addr
= remote_address_masked (addr
);
10099 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10100 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10102 if (remote_supports_cond_breakpoints (self
))
10103 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10105 if (remote_can_run_breakpoint_commands (self
))
10106 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10109 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10111 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10114 if (rs
->buf
[1] == '.')
10116 message
= strchr (rs
->buf
+ 2, '.');
10118 error (_("Remote failure reply: %s"), message
+ 1);
10121 case PACKET_UNKNOWN
:
10126 internal_error (__FILE__
, __LINE__
,
10127 _("remote_insert_hw_breakpoint: reached end of function"));
10132 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10133 struct bp_target_info
*bp_tgt
)
10136 struct remote_state
*rs
= get_remote_state ();
10138 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10140 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10143 /* Make sure the remote is pointing at the right process, if
10145 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10146 set_general_process ();
10152 addr
= remote_address_masked (bp_tgt
->placed_address
);
10153 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10154 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10157 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10159 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10162 case PACKET_UNKNOWN
:
10167 internal_error (__FILE__
, __LINE__
,
10168 _("remote_remove_hw_breakpoint: reached end of function"));
10171 /* Verify memory using the "qCRC:" request. */
10174 remote_verify_memory (struct target_ops
*ops
,
10175 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10177 struct remote_state
*rs
= get_remote_state ();
10178 unsigned long host_crc
, target_crc
;
10181 /* It doesn't make sense to use qCRC if the remote target is
10182 connected but not running. */
10183 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10185 enum packet_result result
;
10187 /* Make sure the remote is pointing at the right process. */
10188 set_general_process ();
10190 /* FIXME: assumes lma can fit into long. */
10191 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10192 (long) lma
, (long) size
);
10195 /* Be clever; compute the host_crc before waiting for target
10197 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10199 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10201 result
= packet_ok (rs
->buf
,
10202 &remote_protocol_packets
[PACKET_qCRC
]);
10203 if (result
== PACKET_ERROR
)
10205 else if (result
== PACKET_OK
)
10207 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10208 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10210 return (host_crc
== target_crc
);
10214 return simple_verify_memory (ops
, data
, lma
, size
);
10217 /* compare-sections command
10219 With no arguments, compares each loadable section in the exec bfd
10220 with the same memory range on the target, and reports mismatches.
10221 Useful for verifying the image on the target against the exec file. */
10224 compare_sections_command (const char *args
, int from_tty
)
10227 const char *sectname
;
10228 bfd_size_type size
;
10231 int mismatched
= 0;
10236 error (_("command cannot be used without an exec file"));
10238 /* Make sure the remote is pointing at the right process. */
10239 set_general_process ();
10241 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10247 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10249 if (!(s
->flags
& SEC_LOAD
))
10250 continue; /* Skip non-loadable section. */
10252 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10253 continue; /* Skip writeable sections */
10255 size
= bfd_get_section_size (s
);
10257 continue; /* Skip zero-length section. */
10259 sectname
= bfd_get_section_name (exec_bfd
, s
);
10260 if (args
&& strcmp (args
, sectname
) != 0)
10261 continue; /* Not the section selected by user. */
10263 matched
= 1; /* Do this section. */
10266 gdb::byte_vector
sectdata (size
);
10267 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10269 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10272 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10273 paddress (target_gdbarch (), lma
),
10274 paddress (target_gdbarch (), lma
+ size
));
10276 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10277 paddress (target_gdbarch (), lma
),
10278 paddress (target_gdbarch (), lma
+ size
));
10280 printf_filtered ("matched.\n");
10283 printf_filtered ("MIS-MATCHED!\n");
10287 if (mismatched
> 0)
10288 warning (_("One or more sections of the target image does not match\n\
10289 the loaded file\n"));
10290 if (args
&& !matched
)
10291 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10294 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10295 into remote target. The number of bytes written to the remote
10296 target is returned, or -1 for error. */
10298 static enum target_xfer_status
10299 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10300 const char *annex
, const gdb_byte
*writebuf
,
10301 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10302 struct packet_config
*packet
)
10306 struct remote_state
*rs
= get_remote_state ();
10307 int max_size
= get_memory_write_packet_size ();
10309 if (packet_config_support (packet
) == PACKET_DISABLE
)
10310 return TARGET_XFER_E_IO
;
10312 /* Insert header. */
10313 i
= snprintf (rs
->buf
, max_size
,
10314 "qXfer:%s:write:%s:%s:",
10315 object_name
, annex
? annex
: "",
10316 phex_nz (offset
, sizeof offset
));
10317 max_size
-= (i
+ 1);
10319 /* Escape as much data as fits into rs->buf. */
10320 buf_len
= remote_escape_output
10321 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10323 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10324 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10325 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10326 return TARGET_XFER_E_IO
;
10328 unpack_varlen_hex (rs
->buf
, &n
);
10331 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10334 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10335 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10336 number of bytes read is returned, or 0 for EOF, or -1 for error.
10337 The number of bytes read may be less than LEN without indicating an
10338 EOF. PACKET is checked and updated to indicate whether the remote
10339 target supports this object. */
10341 static enum target_xfer_status
10342 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10344 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10345 ULONGEST
*xfered_len
,
10346 struct packet_config
*packet
)
10348 struct remote_state
*rs
= get_remote_state ();
10349 LONGEST i
, n
, packet_len
;
10351 if (packet_config_support (packet
) == PACKET_DISABLE
)
10352 return TARGET_XFER_E_IO
;
10354 /* Check whether we've cached an end-of-object packet that matches
10356 if (rs
->finished_object
)
10358 if (strcmp (object_name
, rs
->finished_object
) == 0
10359 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10360 && offset
== rs
->finished_offset
)
10361 return TARGET_XFER_EOF
;
10364 /* Otherwise, we're now reading something different. Discard
10366 xfree (rs
->finished_object
);
10367 xfree (rs
->finished_annex
);
10368 rs
->finished_object
= NULL
;
10369 rs
->finished_annex
= NULL
;
10372 /* Request only enough to fit in a single packet. The actual data
10373 may not, since we don't know how much of it will need to be escaped;
10374 the target is free to respond with slightly less data. We subtract
10375 five to account for the response type and the protocol frame. */
10376 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10377 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10378 object_name
, annex
? annex
: "",
10379 phex_nz (offset
, sizeof offset
),
10380 phex_nz (n
, sizeof n
));
10381 i
= putpkt (rs
->buf
);
10383 return TARGET_XFER_E_IO
;
10386 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10387 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10388 return TARGET_XFER_E_IO
;
10390 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10391 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10393 /* 'm' means there is (or at least might be) more data after this
10394 batch. That does not make sense unless there's at least one byte
10395 of data in this reply. */
10396 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10397 error (_("Remote qXfer reply contained no data."));
10399 /* Got some data. */
10400 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10401 packet_len
- 1, readbuf
, n
);
10403 /* 'l' is an EOF marker, possibly including a final block of data,
10404 or possibly empty. If we have the final block of a non-empty
10405 object, record this fact to bypass a subsequent partial read. */
10406 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10408 rs
->finished_object
= xstrdup (object_name
);
10409 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10410 rs
->finished_offset
= offset
+ i
;
10414 return TARGET_XFER_EOF
;
10418 return TARGET_XFER_OK
;
10422 static enum target_xfer_status
10423 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10424 const char *annex
, gdb_byte
*readbuf
,
10425 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10426 ULONGEST
*xfered_len
)
10428 struct remote_state
*rs
;
10432 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10434 set_remote_traceframe ();
10435 set_general_thread (inferior_ptid
);
10437 rs
= get_remote_state ();
10439 /* Handle memory using the standard memory routines. */
10440 if (object
== TARGET_OBJECT_MEMORY
)
10442 /* If the remote target is connected but not running, we should
10443 pass this request down to a lower stratum (e.g. the executable
10445 if (!target_has_execution
)
10446 return TARGET_XFER_EOF
;
10448 if (writebuf
!= NULL
)
10449 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10452 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10456 /* Handle SPU memory using qxfer packets. */
10457 if (object
== TARGET_OBJECT_SPU
)
10460 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10461 xfered_len
, &remote_protocol_packets
10462 [PACKET_qXfer_spu_read
]);
10464 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10465 xfered_len
, &remote_protocol_packets
10466 [PACKET_qXfer_spu_write
]);
10469 /* Handle extra signal info using qxfer packets. */
10470 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10473 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10474 xfered_len
, &remote_protocol_packets
10475 [PACKET_qXfer_siginfo_read
]);
10477 return remote_write_qxfer (ops
, "siginfo", annex
,
10478 writebuf
, offset
, len
, xfered_len
,
10479 &remote_protocol_packets
10480 [PACKET_qXfer_siginfo_write
]);
10483 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10486 return remote_read_qxfer (ops
, "statictrace", annex
,
10487 readbuf
, offset
, len
, xfered_len
,
10488 &remote_protocol_packets
10489 [PACKET_qXfer_statictrace_read
]);
10491 return TARGET_XFER_E_IO
;
10494 /* Only handle flash writes. */
10495 if (writebuf
!= NULL
)
10499 case TARGET_OBJECT_FLASH
:
10500 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10504 return TARGET_XFER_E_IO
;
10508 /* Map pre-existing objects onto letters. DO NOT do this for new
10509 objects!!! Instead specify new query packets. */
10512 case TARGET_OBJECT_AVR
:
10516 case TARGET_OBJECT_AUXV
:
10517 gdb_assert (annex
== NULL
);
10518 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10520 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10522 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10523 return remote_read_qxfer
10524 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10525 &remote_protocol_packets
[PACKET_qXfer_features
]);
10527 case TARGET_OBJECT_LIBRARIES
:
10528 return remote_read_qxfer
10529 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10530 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10532 case TARGET_OBJECT_LIBRARIES_SVR4
:
10533 return remote_read_qxfer
10534 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10535 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10537 case TARGET_OBJECT_MEMORY_MAP
:
10538 gdb_assert (annex
== NULL
);
10539 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10541 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10543 case TARGET_OBJECT_OSDATA
:
10544 /* Should only get here if we're connected. */
10545 gdb_assert (rs
->remote_desc
);
10546 return remote_read_qxfer
10547 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10548 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10550 case TARGET_OBJECT_THREADS
:
10551 gdb_assert (annex
== NULL
);
10552 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10554 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10556 case TARGET_OBJECT_TRACEFRAME_INFO
:
10557 gdb_assert (annex
== NULL
);
10558 return remote_read_qxfer
10559 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10560 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10562 case TARGET_OBJECT_FDPIC
:
10563 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10565 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10567 case TARGET_OBJECT_OPENVMS_UIB
:
10568 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10570 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10572 case TARGET_OBJECT_BTRACE
:
10573 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10575 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10577 case TARGET_OBJECT_BTRACE_CONF
:
10578 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10580 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10582 case TARGET_OBJECT_EXEC_FILE
:
10583 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10585 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10588 return TARGET_XFER_E_IO
;
10591 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10592 large enough let the caller deal with it. */
10593 if (len
< get_remote_packet_size ())
10594 return TARGET_XFER_E_IO
;
10595 len
= get_remote_packet_size ();
10597 /* Except for querying the minimum buffer size, target must be open. */
10598 if (!rs
->remote_desc
)
10599 error (_("remote query is only available after target open"));
10601 gdb_assert (annex
!= NULL
);
10602 gdb_assert (readbuf
!= NULL
);
10606 *p2
++ = query_type
;
10608 /* We used one buffer char for the remote protocol q command and
10609 another for the query type. As the remote protocol encapsulation
10610 uses 4 chars plus one extra in case we are debugging
10611 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10614 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10616 /* Bad caller may have sent forbidden characters. */
10617 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10622 gdb_assert (annex
[i
] == '\0');
10624 i
= putpkt (rs
->buf
);
10626 return TARGET_XFER_E_IO
;
10628 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10629 strcpy ((char *) readbuf
, rs
->buf
);
10631 *xfered_len
= strlen ((char *) readbuf
);
10632 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10635 /* Implementation of to_get_memory_xfer_limit. */
10638 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10640 return get_memory_write_packet_size ();
10644 remote_search_memory (struct target_ops
* ops
,
10645 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10646 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10647 CORE_ADDR
*found_addrp
)
10649 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10650 struct remote_state
*rs
= get_remote_state ();
10651 int max_size
= get_memory_write_packet_size ();
10652 struct packet_config
*packet
=
10653 &remote_protocol_packets
[PACKET_qSearch_memory
];
10654 /* Number of packet bytes used to encode the pattern;
10655 this could be more than PATTERN_LEN due to escape characters. */
10656 int escaped_pattern_len
;
10657 /* Amount of pattern that was encodable in the packet. */
10658 int used_pattern_len
;
10661 ULONGEST found_addr
;
10663 /* Don't go to the target if we don't have to. This is done before
10664 checking packet_config_support to avoid the possibility that a
10665 success for this edge case means the facility works in
10667 if (pattern_len
> search_space_len
)
10669 if (pattern_len
== 0)
10671 *found_addrp
= start_addr
;
10675 /* If we already know the packet isn't supported, fall back to the simple
10676 way of searching memory. */
10678 if (packet_config_support (packet
) == PACKET_DISABLE
)
10680 /* Target doesn't provided special support, fall back and use the
10681 standard support (copy memory and do the search here). */
10682 return simple_search_memory (ops
, start_addr
, search_space_len
,
10683 pattern
, pattern_len
, found_addrp
);
10686 /* Make sure the remote is pointing at the right process. */
10687 set_general_process ();
10689 /* Insert header. */
10690 i
= snprintf (rs
->buf
, max_size
,
10691 "qSearch:memory:%s;%s;",
10692 phex_nz (start_addr
, addr_size
),
10693 phex_nz (search_space_len
, sizeof (search_space_len
)));
10694 max_size
-= (i
+ 1);
10696 /* Escape as much data as fits into rs->buf. */
10697 escaped_pattern_len
=
10698 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10699 &used_pattern_len
, max_size
);
10701 /* Bail if the pattern is too large. */
10702 if (used_pattern_len
!= pattern_len
)
10703 error (_("Pattern is too large to transmit to remote target."));
10705 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10706 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10707 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10709 /* The request may not have worked because the command is not
10710 supported. If so, fall back to the simple way. */
10711 if (packet_config_support (packet
) == PACKET_DISABLE
)
10713 return simple_search_memory (ops
, start_addr
, search_space_len
,
10714 pattern
, pattern_len
, found_addrp
);
10719 if (rs
->buf
[0] == '0')
10721 else if (rs
->buf
[0] == '1')
10724 if (rs
->buf
[1] != ',')
10725 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10726 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10727 *found_addrp
= found_addr
;
10730 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10736 remote_rcmd (struct target_ops
*self
, const char *command
,
10737 struct ui_file
*outbuf
)
10739 struct remote_state
*rs
= get_remote_state ();
10742 if (!rs
->remote_desc
)
10743 error (_("remote rcmd is only available after target open"));
10745 /* Send a NULL command across as an empty command. */
10746 if (command
== NULL
)
10749 /* The query prefix. */
10750 strcpy (rs
->buf
, "qRcmd,");
10751 p
= strchr (rs
->buf
, '\0');
10753 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10754 > get_remote_packet_size ())
10755 error (_("\"monitor\" command ``%s'' is too long."), command
);
10757 /* Encode the actual command. */
10758 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10760 if (putpkt (rs
->buf
) < 0)
10761 error (_("Communication problem with target."));
10763 /* get/display the response */
10768 /* XXX - see also remote_get_noisy_reply(). */
10769 QUIT
; /* Allow user to bail out with ^C. */
10771 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10773 /* Timeout. Continue to (try to) read responses.
10774 This is better than stopping with an error, assuming the stub
10775 is still executing the (long) monitor command.
10776 If needed, the user can interrupt gdb using C-c, obtaining
10777 an effect similar to stop on timeout. */
10781 if (buf
[0] == '\0')
10782 error (_("Target does not support this command."));
10783 if (buf
[0] == 'O' && buf
[1] != 'K')
10785 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10788 if (strcmp (buf
, "OK") == 0)
10790 if (strlen (buf
) == 3 && buf
[0] == 'E'
10791 && isdigit (buf
[1]) && isdigit (buf
[2]))
10793 error (_("Protocol error with Rcmd"));
10795 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10797 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10799 fputc_unfiltered (c
, outbuf
);
10805 static std::vector
<mem_region
>
10806 remote_memory_map (struct target_ops
*ops
)
10808 std::vector
<mem_region
> result
;
10809 gdb::unique_xmalloc_ptr
<char> text
10810 = target_read_stralloc (¤t_target
, TARGET_OBJECT_MEMORY_MAP
, NULL
);
10813 result
= parse_memory_map (text
.get ());
10819 packet_command (const char *args
, int from_tty
)
10821 struct remote_state
*rs
= get_remote_state ();
10823 if (!rs
->remote_desc
)
10824 error (_("command can only be used with remote target"));
10827 error (_("remote-packet command requires packet text as argument"));
10829 puts_filtered ("sending: ");
10830 print_packet (args
);
10831 puts_filtered ("\n");
10834 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10835 puts_filtered ("received: ");
10836 print_packet (rs
->buf
);
10837 puts_filtered ("\n");
10841 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10843 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10845 static void threadset_test_cmd (char *cmd
, int tty
);
10847 static void threadalive_test (char *cmd
, int tty
);
10849 static void threadlist_test_cmd (char *cmd
, int tty
);
10851 int get_and_display_threadinfo (threadref
*ref
);
10853 static void threadinfo_test_cmd (char *cmd
, int tty
);
10855 static int thread_display_step (threadref
*ref
, void *context
);
10857 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10859 static void init_remote_threadtests (void);
10861 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10864 threadset_test_cmd (const char *cmd
, int tty
)
10866 int sample_thread
= SAMPLE_THREAD
;
10868 printf_filtered (_("Remote threadset test\n"));
10869 set_general_thread (sample_thread
);
10874 threadalive_test (const char *cmd
, int tty
)
10876 int sample_thread
= SAMPLE_THREAD
;
10877 int pid
= ptid_get_pid (inferior_ptid
);
10878 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10880 if (remote_thread_alive (ptid
))
10881 printf_filtered ("PASS: Thread alive test\n");
10883 printf_filtered ("FAIL: Thread alive test\n");
10886 void output_threadid (char *title
, threadref
*ref
);
10889 output_threadid (char *title
, threadref
*ref
)
10893 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10895 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10899 threadlist_test_cmd (const char *cmd
, int tty
)
10902 threadref nextthread
;
10903 int done
, result_count
;
10904 threadref threadlist
[3];
10906 printf_filtered ("Remote Threadlist test\n");
10907 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10908 &result_count
, &threadlist
[0]))
10909 printf_filtered ("FAIL: threadlist test\n");
10912 threadref
*scan
= threadlist
;
10913 threadref
*limit
= scan
+ result_count
;
10915 while (scan
< limit
)
10916 output_threadid (" thread ", scan
++);
10921 display_thread_info (struct gdb_ext_thread_info
*info
)
10923 output_threadid ("Threadid: ", &info
->threadid
);
10924 printf_filtered ("Name: %s\n ", info
->shortname
);
10925 printf_filtered ("State: %s\n", info
->display
);
10926 printf_filtered ("other: %s\n\n", info
->more_display
);
10930 get_and_display_threadinfo (threadref
*ref
)
10934 struct gdb_ext_thread_info threadinfo
;
10936 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10937 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10938 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10939 display_thread_info (&threadinfo
);
10944 threadinfo_test_cmd (const char *cmd
, int tty
)
10946 int athread
= SAMPLE_THREAD
;
10950 int_to_threadref (&thread
, athread
);
10951 printf_filtered ("Remote Threadinfo test\n");
10952 if (!get_and_display_threadinfo (&thread
))
10953 printf_filtered ("FAIL cannot get thread info\n");
10957 thread_display_step (threadref
*ref
, void *context
)
10959 /* output_threadid(" threadstep ",ref); *//* simple test */
10960 return get_and_display_threadinfo (ref
);
10964 threadlist_update_test_cmd (const char *cmd
, int tty
)
10966 printf_filtered ("Remote Threadlist update test\n");
10967 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10971 init_remote_threadtests (void)
10973 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10974 _("Fetch and print the remote list of "
10975 "thread identifiers, one pkt only"));
10976 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
10977 _("Fetch and display info about one thread"));
10978 add_com ("tset", class_obscure
, threadset_test_cmd
,
10979 _("Test setting to a different thread"));
10980 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
10981 _("Iterate through updating all remote thread info"));
10982 add_com ("talive", class_obscure
, threadalive_test
,
10983 _(" Remote thread alive test "));
10988 /* Convert a thread ID to a string. Returns the string in a static
10991 static const char *
10992 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
10994 static char buf
[64];
10995 struct remote_state
*rs
= get_remote_state ();
10997 if (ptid_equal (ptid
, null_ptid
))
10998 return normal_pid_to_str (ptid
);
10999 else if (ptid_is_pid (ptid
))
11001 /* Printing an inferior target id. */
11003 /* When multi-process extensions are off, there's no way in the
11004 remote protocol to know the remote process id, if there's any
11005 at all. There's one exception --- when we're connected with
11006 target extended-remote, and we manually attached to a process
11007 with "attach PID". We don't record anywhere a flag that
11008 allows us to distinguish that case from the case of
11009 connecting with extended-remote and the stub already being
11010 attached to a process, and reporting yes to qAttached, hence
11011 no smart special casing here. */
11012 if (!remote_multi_process_p (rs
))
11014 xsnprintf (buf
, sizeof buf
, "Remote target");
11018 return normal_pid_to_str (ptid
);
11022 if (ptid_equal (magic_null_ptid
, ptid
))
11023 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11024 else if (remote_multi_process_p (rs
))
11025 if (ptid_get_lwp (ptid
) == 0)
11026 return normal_pid_to_str (ptid
);
11028 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11029 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
11031 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11032 ptid_get_lwp (ptid
));
11037 /* Get the address of the thread local variable in OBJFILE which is
11038 stored at OFFSET within the thread local storage for thread PTID. */
11041 remote_get_thread_local_address (struct target_ops
*ops
,
11042 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11044 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11046 struct remote_state
*rs
= get_remote_state ();
11048 char *endp
= rs
->buf
+ get_remote_packet_size ();
11049 enum packet_result result
;
11051 strcpy (p
, "qGetTLSAddr:");
11053 p
= write_ptid (p
, endp
, ptid
);
11055 p
+= hexnumstr (p
, offset
);
11057 p
+= hexnumstr (p
, lm
);
11061 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11062 result
= packet_ok (rs
->buf
,
11063 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11064 if (result
== PACKET_OK
)
11068 unpack_varlen_hex (rs
->buf
, &result
);
11071 else if (result
== PACKET_UNKNOWN
)
11072 throw_error (TLS_GENERIC_ERROR
,
11073 _("Remote target doesn't support qGetTLSAddr packet"));
11075 throw_error (TLS_GENERIC_ERROR
,
11076 _("Remote target failed to process qGetTLSAddr request"));
11079 throw_error (TLS_GENERIC_ERROR
,
11080 _("TLS not supported or disabled on this target"));
11085 /* Provide thread local base, i.e. Thread Information Block address.
11086 Returns 1 if ptid is found and thread_local_base is non zero. */
11089 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11091 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11093 struct remote_state
*rs
= get_remote_state ();
11095 char *endp
= rs
->buf
+ get_remote_packet_size ();
11096 enum packet_result result
;
11098 strcpy (p
, "qGetTIBAddr:");
11100 p
= write_ptid (p
, endp
, ptid
);
11104 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11105 result
= packet_ok (rs
->buf
,
11106 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11107 if (result
== PACKET_OK
)
11111 unpack_varlen_hex (rs
->buf
, &result
);
11113 *addr
= (CORE_ADDR
) result
;
11116 else if (result
== PACKET_UNKNOWN
)
11117 error (_("Remote target doesn't support qGetTIBAddr packet"));
11119 error (_("Remote target failed to process qGetTIBAddr request"));
11122 error (_("qGetTIBAddr not supported or disabled on this target"));
11127 /* Support for inferring a target description based on the current
11128 architecture and the size of a 'g' packet. While the 'g' packet
11129 can have any size (since optional registers can be left off the
11130 end), some sizes are easily recognizable given knowledge of the
11131 approximate architecture. */
11133 struct remote_g_packet_guess
11136 const struct target_desc
*tdesc
;
11138 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11139 DEF_VEC_O(remote_g_packet_guess_s
);
11141 struct remote_g_packet_data
11143 VEC(remote_g_packet_guess_s
) *guesses
;
11146 static struct gdbarch_data
*remote_g_packet_data_handle
;
11149 remote_g_packet_data_init (struct obstack
*obstack
)
11151 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11155 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11156 const struct target_desc
*tdesc
)
11158 struct remote_g_packet_data
*data
11159 = ((struct remote_g_packet_data
*)
11160 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11161 struct remote_g_packet_guess new_guess
, *guess
;
11164 gdb_assert (tdesc
!= NULL
);
11167 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11169 if (guess
->bytes
== bytes
)
11170 internal_error (__FILE__
, __LINE__
,
11171 _("Duplicate g packet description added for size %d"),
11174 new_guess
.bytes
= bytes
;
11175 new_guess
.tdesc
= tdesc
;
11176 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11179 /* Return 1 if remote_read_description would do anything on this target
11180 and architecture, 0 otherwise. */
11183 remote_read_description_p (struct target_ops
*target
)
11185 struct remote_g_packet_data
*data
11186 = ((struct remote_g_packet_data
*)
11187 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11189 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11195 static const struct target_desc
*
11196 remote_read_description (struct target_ops
*target
)
11198 struct remote_g_packet_data
*data
11199 = ((struct remote_g_packet_data
*)
11200 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11202 /* Do not try this during initial connection, when we do not know
11203 whether there is a running but stopped thread. */
11204 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11205 return target
->beneath
->to_read_description (target
->beneath
);
11207 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11209 struct remote_g_packet_guess
*guess
;
11211 int bytes
= send_g_packet ();
11214 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11216 if (guess
->bytes
== bytes
)
11217 return guess
->tdesc
;
11219 /* We discard the g packet. A minor optimization would be to
11220 hold on to it, and fill the register cache once we have selected
11221 an architecture, but it's too tricky to do safely. */
11224 return target
->beneath
->to_read_description (target
->beneath
);
11227 /* Remote file transfer support. This is host-initiated I/O, not
11228 target-initiated; for target-initiated, see remote-fileio.c. */
11230 /* If *LEFT is at least the length of STRING, copy STRING to
11231 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11232 decrease *LEFT. Otherwise raise an error. */
11235 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11237 int len
= strlen (string
);
11240 error (_("Packet too long for target."));
11242 memcpy (*buffer
, string
, len
);
11246 /* NUL-terminate the buffer as a convenience, if there is
11252 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11253 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11254 decrease *LEFT. Otherwise raise an error. */
11257 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11260 if (2 * len
> *left
)
11261 error (_("Packet too long for target."));
11263 bin2hex (bytes
, *buffer
, len
);
11264 *buffer
+= 2 * len
;
11267 /* NUL-terminate the buffer as a convenience, if there is
11273 /* If *LEFT is large enough, convert VALUE to hex and add it to
11274 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11275 decrease *LEFT. Otherwise raise an error. */
11278 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11280 int len
= hexnumlen (value
);
11283 error (_("Packet too long for target."));
11285 hexnumstr (*buffer
, value
);
11289 /* NUL-terminate the buffer as a convenience, if there is
11295 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11296 value, *REMOTE_ERRNO to the remote error number or zero if none
11297 was included, and *ATTACHMENT to point to the start of the annex
11298 if any. The length of the packet isn't needed here; there may
11299 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11301 Return 0 if the packet could be parsed, -1 if it could not. If
11302 -1 is returned, the other variables may not be initialized. */
11305 remote_hostio_parse_result (char *buffer
, int *retcode
,
11306 int *remote_errno
, char **attachment
)
11311 *attachment
= NULL
;
11313 if (buffer
[0] != 'F')
11317 *retcode
= strtol (&buffer
[1], &p
, 16);
11318 if (errno
!= 0 || p
== &buffer
[1])
11321 /* Check for ",errno". */
11325 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11326 if (errno
!= 0 || p
+ 1 == p2
)
11331 /* Check for ";attachment". If there is no attachment, the
11332 packet should end here. */
11335 *attachment
= p
+ 1;
11338 else if (*p
== '\0')
11344 /* Send a prepared I/O packet to the target and read its response.
11345 The prepared packet is in the global RS->BUF before this function
11346 is called, and the answer is there when we return.
11348 COMMAND_BYTES is the length of the request to send, which may include
11349 binary data. WHICH_PACKET is the packet configuration to check
11350 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11351 is set to the error number and -1 is returned. Otherwise the value
11352 returned by the function is returned.
11354 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11355 attachment is expected; an error will be reported if there's a
11356 mismatch. If one is found, *ATTACHMENT will be set to point into
11357 the packet buffer and *ATTACHMENT_LEN will be set to the
11358 attachment's length. */
11361 remote_hostio_send_command (int command_bytes
, int which_packet
,
11362 int *remote_errno
, char **attachment
,
11363 int *attachment_len
)
11365 struct remote_state
*rs
= get_remote_state ();
11366 int ret
, bytes_read
;
11367 char *attachment_tmp
;
11369 if (!rs
->remote_desc
11370 || packet_support (which_packet
) == PACKET_DISABLE
)
11372 *remote_errno
= FILEIO_ENOSYS
;
11376 putpkt_binary (rs
->buf
, command_bytes
);
11377 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11379 /* If it timed out, something is wrong. Don't try to parse the
11381 if (bytes_read
< 0)
11383 *remote_errno
= FILEIO_EINVAL
;
11387 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11390 *remote_errno
= FILEIO_EINVAL
;
11392 case PACKET_UNKNOWN
:
11393 *remote_errno
= FILEIO_ENOSYS
;
11399 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11402 *remote_errno
= FILEIO_EINVAL
;
11406 /* Make sure we saw an attachment if and only if we expected one. */
11407 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11408 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11410 *remote_errno
= FILEIO_EINVAL
;
11414 /* If an attachment was found, it must point into the packet buffer;
11415 work out how many bytes there were. */
11416 if (attachment_tmp
!= NULL
)
11418 *attachment
= attachment_tmp
;
11419 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11425 /* Invalidate the readahead cache. */
11428 readahead_cache_invalidate (void)
11430 struct remote_state
*rs
= get_remote_state ();
11432 rs
->readahead_cache
.fd
= -1;
11435 /* Invalidate the readahead cache if it is holding data for FD. */
11438 readahead_cache_invalidate_fd (int fd
)
11440 struct remote_state
*rs
= get_remote_state ();
11442 if (rs
->readahead_cache
.fd
== fd
)
11443 rs
->readahead_cache
.fd
= -1;
11446 /* Set the filesystem remote_hostio functions that take FILENAME
11447 arguments will use. Return 0 on success, or -1 if an error
11448 occurs (and set *REMOTE_ERRNO). */
11451 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11453 struct remote_state
*rs
= get_remote_state ();
11454 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11456 int left
= get_remote_packet_size () - 1;
11460 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11463 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11466 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11468 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11469 remote_buffer_add_string (&p
, &left
, arg
);
11471 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11472 remote_errno
, NULL
, NULL
);
11474 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11478 rs
->fs_pid
= required_pid
;
11483 /* Implementation of to_fileio_open. */
11486 remote_hostio_open (struct target_ops
*self
,
11487 struct inferior
*inf
, const char *filename
,
11488 int flags
, int mode
, int warn_if_slow
,
11491 struct remote_state
*rs
= get_remote_state ();
11493 int left
= get_remote_packet_size () - 1;
11497 static int warning_issued
= 0;
11499 printf_unfiltered (_("Reading %s from remote target...\n"),
11502 if (!warning_issued
)
11504 warning (_("File transfers from remote targets can be slow."
11505 " Use \"set sysroot\" to access files locally"
11507 warning_issued
= 1;
11511 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11514 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11516 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11517 strlen (filename
));
11518 remote_buffer_add_string (&p
, &left
, ",");
11520 remote_buffer_add_int (&p
, &left
, flags
);
11521 remote_buffer_add_string (&p
, &left
, ",");
11523 remote_buffer_add_int (&p
, &left
, mode
);
11525 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11526 remote_errno
, NULL
, NULL
);
11529 /* Implementation of to_fileio_pwrite. */
11532 remote_hostio_pwrite (struct target_ops
*self
,
11533 int fd
, const gdb_byte
*write_buf
, int len
,
11534 ULONGEST offset
, int *remote_errno
)
11536 struct remote_state
*rs
= get_remote_state ();
11538 int left
= get_remote_packet_size ();
11541 readahead_cache_invalidate_fd (fd
);
11543 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11545 remote_buffer_add_int (&p
, &left
, fd
);
11546 remote_buffer_add_string (&p
, &left
, ",");
11548 remote_buffer_add_int (&p
, &left
, offset
);
11549 remote_buffer_add_string (&p
, &left
, ",");
11551 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11552 get_remote_packet_size () - (p
- rs
->buf
));
11554 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11555 remote_errno
, NULL
, NULL
);
11558 /* Helper for the implementation of to_fileio_pread. Read the file
11559 from the remote side with vFile:pread. */
11562 remote_hostio_pread_vFile (struct target_ops
*self
,
11563 int fd
, gdb_byte
*read_buf
, int len
,
11564 ULONGEST offset
, int *remote_errno
)
11566 struct remote_state
*rs
= get_remote_state ();
11569 int left
= get_remote_packet_size ();
11570 int ret
, attachment_len
;
11573 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11575 remote_buffer_add_int (&p
, &left
, fd
);
11576 remote_buffer_add_string (&p
, &left
, ",");
11578 remote_buffer_add_int (&p
, &left
, len
);
11579 remote_buffer_add_string (&p
, &left
, ",");
11581 remote_buffer_add_int (&p
, &left
, offset
);
11583 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11584 remote_errno
, &attachment
,
11590 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11592 if (read_len
!= ret
)
11593 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11598 /* Serve pread from the readahead cache. Returns number of bytes
11599 read, or 0 if the request can't be served from the cache. */
11602 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11603 int fd
, gdb_byte
*read_buf
, size_t len
,
11606 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11608 if (cache
->fd
== fd
11609 && cache
->offset
<= offset
11610 && offset
< cache
->offset
+ cache
->bufsize
)
11612 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11614 if (offset
+ len
> max
)
11615 len
= max
- offset
;
11617 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11624 /* Implementation of to_fileio_pread. */
11627 remote_hostio_pread (struct target_ops
*self
,
11628 int fd
, gdb_byte
*read_buf
, int len
,
11629 ULONGEST offset
, int *remote_errno
)
11632 struct remote_state
*rs
= get_remote_state ();
11633 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11635 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11638 cache
->hit_count
++;
11641 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11642 pulongest (cache
->hit_count
));
11646 cache
->miss_count
++;
11648 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11649 pulongest (cache
->miss_count
));
11652 cache
->offset
= offset
;
11653 cache
->bufsize
= get_remote_packet_size ();
11654 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11656 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11657 cache
->offset
, remote_errno
);
11660 readahead_cache_invalidate_fd (fd
);
11664 cache
->bufsize
= ret
;
11665 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11668 /* Implementation of to_fileio_close. */
11671 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11673 struct remote_state
*rs
= get_remote_state ();
11675 int left
= get_remote_packet_size () - 1;
11677 readahead_cache_invalidate_fd (fd
);
11679 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11681 remote_buffer_add_int (&p
, &left
, fd
);
11683 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11684 remote_errno
, NULL
, NULL
);
11687 /* Implementation of to_fileio_unlink. */
11690 remote_hostio_unlink (struct target_ops
*self
,
11691 struct inferior
*inf
, const char *filename
,
11694 struct remote_state
*rs
= get_remote_state ();
11696 int left
= get_remote_packet_size () - 1;
11698 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11701 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11703 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11704 strlen (filename
));
11706 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11707 remote_errno
, NULL
, NULL
);
11710 /* Implementation of to_fileio_readlink. */
11712 static gdb::optional
<std::string
>
11713 remote_hostio_readlink (struct target_ops
*self
,
11714 struct inferior
*inf
, const char *filename
,
11717 struct remote_state
*rs
= get_remote_state ();
11720 int left
= get_remote_packet_size ();
11721 int len
, attachment_len
;
11724 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11727 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11729 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11730 strlen (filename
));
11732 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11733 remote_errno
, &attachment
,
11739 std::string
ret (len
, '\0');
11741 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11742 (gdb_byte
*) &ret
[0], len
);
11743 if (read_len
!= len
)
11744 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11749 /* Implementation of to_fileio_fstat. */
11752 remote_hostio_fstat (struct target_ops
*self
,
11753 int fd
, struct stat
*st
,
11756 struct remote_state
*rs
= get_remote_state ();
11758 int left
= get_remote_packet_size ();
11759 int attachment_len
, ret
;
11761 struct fio_stat fst
;
11764 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11766 remote_buffer_add_int (&p
, &left
, fd
);
11768 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11769 remote_errno
, &attachment
,
11773 if (*remote_errno
!= FILEIO_ENOSYS
)
11776 /* Strictly we should return -1, ENOSYS here, but when
11777 "set sysroot remote:" was implemented in August 2008
11778 BFD's need for a stat function was sidestepped with
11779 this hack. This was not remedied until March 2015
11780 so we retain the previous behavior to avoid breaking
11783 Note that the memset is a March 2015 addition; older
11784 GDBs set st_size *and nothing else* so the structure
11785 would have garbage in all other fields. This might
11786 break something but retaining the previous behavior
11787 here would be just too wrong. */
11789 memset (st
, 0, sizeof (struct stat
));
11790 st
->st_size
= INT_MAX
;
11794 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11795 (gdb_byte
*) &fst
, sizeof (fst
));
11797 if (read_len
!= ret
)
11798 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11800 if (read_len
!= sizeof (fst
))
11801 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11802 read_len
, (int) sizeof (fst
));
11804 remote_fileio_to_host_stat (&fst
, st
);
11809 /* Implementation of to_filesystem_is_local. */
11812 remote_filesystem_is_local (struct target_ops
*self
)
11814 /* Valgrind GDB presents itself as a remote target but works
11815 on the local filesystem: it does not implement remote get
11816 and users are not expected to set a sysroot. To handle
11817 this case we treat the remote filesystem as local if the
11818 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11819 does not support vFile:open. */
11820 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11822 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11824 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11826 int fd
, remote_errno
;
11828 /* Try opening a file to probe support. The supplied
11829 filename is irrelevant, we only care about whether
11830 the stub recognizes the packet or not. */
11831 fd
= remote_hostio_open (self
, NULL
, "just probing",
11832 FILEIO_O_RDONLY
, 0700, 0,
11836 remote_hostio_close (self
, fd
, &remote_errno
);
11838 ps
= packet_support (PACKET_vFile_open
);
11841 if (ps
== PACKET_DISABLE
)
11843 static int warning_issued
= 0;
11845 if (!warning_issued
)
11847 warning (_("remote target does not support file"
11848 " transfer, attempting to access files"
11849 " from local filesystem."));
11850 warning_issued
= 1;
11861 remote_fileio_errno_to_host (int errnum
)
11867 case FILEIO_ENOENT
:
11875 case FILEIO_EACCES
:
11877 case FILEIO_EFAULT
:
11881 case FILEIO_EEXIST
:
11883 case FILEIO_ENODEV
:
11885 case FILEIO_ENOTDIR
:
11887 case FILEIO_EISDIR
:
11889 case FILEIO_EINVAL
:
11891 case FILEIO_ENFILE
:
11893 case FILEIO_EMFILE
:
11897 case FILEIO_ENOSPC
:
11899 case FILEIO_ESPIPE
:
11903 case FILEIO_ENOSYS
:
11905 case FILEIO_ENAMETOOLONG
:
11906 return ENAMETOOLONG
;
11912 remote_hostio_error (int errnum
)
11914 int host_error
= remote_fileio_errno_to_host (errnum
);
11916 if (host_error
== -1)
11917 error (_("Unknown remote I/O error %d"), errnum
);
11919 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11923 remote_hostio_close_cleanup (void *opaque
)
11925 int fd
= *(int *) opaque
;
11928 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11932 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11934 struct cleanup
*back_to
, *close_cleanup
;
11935 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11937 int bytes_in_buffer
;
11940 struct remote_state
*rs
= get_remote_state ();
11942 if (!rs
->remote_desc
)
11943 error (_("command can only be used with remote target"));
11945 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
11947 perror_with_name (local_file
);
11949 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11950 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11952 0700, 0, &remote_errno
);
11954 remote_hostio_error (remote_errno
);
11956 /* Send up to this many bytes at once. They won't all fit in the
11957 remote packet limit, so we'll transfer slightly fewer. */
11958 io_size
= get_remote_packet_size ();
11959 buffer
= (gdb_byte
*) xmalloc (io_size
);
11960 back_to
= make_cleanup (xfree
, buffer
);
11962 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11964 bytes_in_buffer
= 0;
11967 while (bytes_in_buffer
|| !saw_eof
)
11971 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11972 io_size
- bytes_in_buffer
,
11976 if (ferror (file
.get ()))
11977 error (_("Error reading %s."), local_file
);
11980 /* EOF. Unless there is something still in the
11981 buffer from the last iteration, we are done. */
11983 if (bytes_in_buffer
== 0)
11991 bytes
+= bytes_in_buffer
;
11992 bytes_in_buffer
= 0;
11994 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
11996 offset
, &remote_errno
);
11999 remote_hostio_error (remote_errno
);
12000 else if (retcode
== 0)
12001 error (_("Remote write of %d bytes returned 0!"), bytes
);
12002 else if (retcode
< bytes
)
12004 /* Short write. Save the rest of the read data for the next
12006 bytes_in_buffer
= bytes
- retcode
;
12007 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
12013 discard_cleanups (close_cleanup
);
12014 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12015 remote_hostio_error (remote_errno
);
12018 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12019 do_cleanups (back_to
);
12023 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12025 struct cleanup
*back_to
, *close_cleanup
;
12026 int fd
, remote_errno
, bytes
, io_size
;
12029 struct remote_state
*rs
= get_remote_state ();
12031 if (!rs
->remote_desc
)
12032 error (_("command can only be used with remote target"));
12034 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12035 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12038 remote_hostio_error (remote_errno
);
12040 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12042 perror_with_name (local_file
);
12044 /* Send up to this many bytes at once. They won't all fit in the
12045 remote packet limit, so we'll transfer slightly fewer. */
12046 io_size
= get_remote_packet_size ();
12047 buffer
= (gdb_byte
*) xmalloc (io_size
);
12048 back_to
= make_cleanup (xfree
, buffer
);
12050 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12055 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12056 fd
, buffer
, io_size
, offset
, &remote_errno
);
12058 /* Success, but no bytes, means end-of-file. */
12061 remote_hostio_error (remote_errno
);
12065 bytes
= fwrite (buffer
, 1, bytes
, file
.get ());
12067 perror_with_name (local_file
);
12070 discard_cleanups (close_cleanup
);
12071 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12072 remote_hostio_error (remote_errno
);
12075 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12076 do_cleanups (back_to
);
12080 remote_file_delete (const char *remote_file
, int from_tty
)
12082 int retcode
, remote_errno
;
12083 struct remote_state
*rs
= get_remote_state ();
12085 if (!rs
->remote_desc
)
12086 error (_("command can only be used with remote target"));
12088 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12089 NULL
, remote_file
, &remote_errno
);
12091 remote_hostio_error (remote_errno
);
12094 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12098 remote_put_command (const char *args
, int from_tty
)
12101 error_no_arg (_("file to put"));
12103 gdb_argv
argv (args
);
12104 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12105 error (_("Invalid parameters to remote put"));
12107 remote_file_put (argv
[0], argv
[1], from_tty
);
12111 remote_get_command (const char *args
, int from_tty
)
12114 error_no_arg (_("file to get"));
12116 gdb_argv
argv (args
);
12117 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12118 error (_("Invalid parameters to remote get"));
12120 remote_file_get (argv
[0], argv
[1], from_tty
);
12124 remote_delete_command (const char *args
, int from_tty
)
12127 error_no_arg (_("file to delete"));
12129 gdb_argv
argv (args
);
12130 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12131 error (_("Invalid parameters to remote delete"));
12133 remote_file_delete (argv
[0], from_tty
);
12137 remote_command (const char *args
, int from_tty
)
12139 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12143 remote_can_execute_reverse (struct target_ops
*self
)
12145 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12146 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12153 remote_supports_non_stop (struct target_ops
*self
)
12159 remote_supports_disable_randomization (struct target_ops
*self
)
12161 /* Only supported in extended mode. */
12166 remote_supports_multi_process (struct target_ops
*self
)
12168 struct remote_state
*rs
= get_remote_state ();
12170 return remote_multi_process_p (rs
);
12174 remote_supports_cond_tracepoints (void)
12176 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12180 remote_supports_cond_breakpoints (struct target_ops
*self
)
12182 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12186 remote_supports_fast_tracepoints (void)
12188 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12192 remote_supports_static_tracepoints (void)
12194 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12198 remote_supports_install_in_trace (void)
12200 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12204 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12206 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12211 remote_supports_string_tracing (struct target_ops
*self
)
12213 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12217 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12219 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12223 remote_trace_init (struct target_ops
*self
)
12225 struct remote_state
*rs
= get_remote_state ();
12228 remote_get_noisy_reply ();
12229 if (strcmp (rs
->buf
, "OK") != 0)
12230 error (_("Target does not support this command."));
12233 /* Recursive routine to walk through command list including loops, and
12234 download packets for each command. */
12237 remote_download_command_source (int num
, ULONGEST addr
,
12238 struct command_line
*cmds
)
12240 struct remote_state
*rs
= get_remote_state ();
12241 struct command_line
*cmd
;
12243 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12245 QUIT
; /* Allow user to bail out with ^C. */
12246 strcpy (rs
->buf
, "QTDPsrc:");
12247 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12248 rs
->buf
+ strlen (rs
->buf
),
12249 rs
->buf_size
- strlen (rs
->buf
));
12251 remote_get_noisy_reply ();
12252 if (strcmp (rs
->buf
, "OK"))
12253 warning (_("Target does not support source download."));
12255 if (cmd
->control_type
== while_control
12256 || cmd
->control_type
== while_stepping_control
)
12258 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12260 QUIT
; /* Allow user to bail out with ^C. */
12261 strcpy (rs
->buf
, "QTDPsrc:");
12262 encode_source_string (num
, addr
, "cmd", "end",
12263 rs
->buf
+ strlen (rs
->buf
),
12264 rs
->buf_size
- strlen (rs
->buf
));
12266 remote_get_noisy_reply ();
12267 if (strcmp (rs
->buf
, "OK"))
12268 warning (_("Target does not support source download."));
12274 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12276 #define BUF_SIZE 2048
12280 char buf
[BUF_SIZE
];
12281 std::vector
<std::string
> tdp_actions
;
12282 std::vector
<std::string
> stepping_actions
;
12284 struct breakpoint
*b
= loc
->owner
;
12285 struct tracepoint
*t
= (struct tracepoint
*) b
;
12286 struct remote_state
*rs
= get_remote_state ();
12288 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12290 tpaddr
= loc
->address
;
12291 sprintf_vma (addrbuf
, tpaddr
);
12292 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12293 addrbuf
, /* address */
12294 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12295 t
->step_count
, t
->pass_count
);
12296 /* Fast tracepoints are mostly handled by the target, but we can
12297 tell the target how big of an instruction block should be moved
12299 if (b
->type
== bp_fast_tracepoint
)
12301 /* Only test for support at download time; we may not know
12302 target capabilities at definition time. */
12303 if (remote_supports_fast_tracepoints ())
12305 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12307 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12308 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12310 /* If it passed validation at definition but fails now,
12311 something is very wrong. */
12312 internal_error (__FILE__
, __LINE__
,
12313 _("Fast tracepoint not "
12314 "valid during download"));
12317 /* Fast tracepoints are functionally identical to regular
12318 tracepoints, so don't take lack of support as a reason to
12319 give up on the trace run. */
12320 warning (_("Target does not support fast tracepoints, "
12321 "downloading %d as regular tracepoint"), b
->number
);
12323 else if (b
->type
== bp_static_tracepoint
)
12325 /* Only test for support at download time; we may not know
12326 target capabilities at definition time. */
12327 if (remote_supports_static_tracepoints ())
12329 struct static_tracepoint_marker marker
;
12331 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12332 strcat (buf
, ":S");
12334 error (_("Static tracepoint not valid during download"));
12337 /* Fast tracepoints are functionally identical to regular
12338 tracepoints, so don't take lack of support as a reason
12339 to give up on the trace run. */
12340 error (_("Target does not support static tracepoints"));
12342 /* If the tracepoint has a conditional, make it into an agent
12343 expression and append to the definition. */
12346 /* Only test support at download time, we may not know target
12347 capabilities at definition time. */
12348 if (remote_supports_cond_tracepoints ())
12350 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12351 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12353 pkt
= buf
+ strlen (buf
);
12354 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12355 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12359 warning (_("Target does not support conditional tracepoints, "
12360 "ignoring tp %d cond"), b
->number
);
12363 if (b
->commands
|| *default_collect
)
12366 remote_get_noisy_reply ();
12367 if (strcmp (rs
->buf
, "OK"))
12368 error (_("Target does not support tracepoints."));
12370 /* do_single_steps (t); */
12371 for (auto action_it
= tdp_actions
.begin ();
12372 action_it
!= tdp_actions
.end (); action_it
++)
12374 QUIT
; /* Allow user to bail out with ^C. */
12376 bool has_more
= (action_it
!= tdp_actions
.end ()
12377 || !stepping_actions
.empty ());
12379 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12380 b
->number
, addrbuf
, /* address */
12381 action_it
->c_str (),
12382 has_more
? '-' : 0);
12384 remote_get_noisy_reply ();
12385 if (strcmp (rs
->buf
, "OK"))
12386 error (_("Error on target while setting tracepoints."));
12389 for (auto action_it
= stepping_actions
.begin ();
12390 action_it
!= stepping_actions
.end (); action_it
++)
12392 QUIT
; /* Allow user to bail out with ^C. */
12394 bool is_first
= action_it
== stepping_actions
.begin ();
12395 bool has_more
= action_it
!= stepping_actions
.end ();
12397 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12398 b
->number
, addrbuf
, /* address */
12399 is_first
? "S" : "",
12400 action_it
->c_str (),
12401 has_more
? "-" : "");
12403 remote_get_noisy_reply ();
12404 if (strcmp (rs
->buf
, "OK"))
12405 error (_("Error on target while setting tracepoints."));
12408 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12410 if (b
->location
!= NULL
)
12412 strcpy (buf
, "QTDPsrc:");
12413 encode_source_string (b
->number
, loc
->address
, "at",
12414 event_location_to_string (b
->location
.get ()),
12415 buf
+ strlen (buf
), 2048 - strlen (buf
));
12417 remote_get_noisy_reply ();
12418 if (strcmp (rs
->buf
, "OK"))
12419 warning (_("Target does not support source download."));
12421 if (b
->cond_string
)
12423 strcpy (buf
, "QTDPsrc:");
12424 encode_source_string (b
->number
, loc
->address
,
12425 "cond", b
->cond_string
, buf
+ strlen (buf
),
12426 2048 - strlen (buf
));
12428 remote_get_noisy_reply ();
12429 if (strcmp (rs
->buf
, "OK"))
12430 warning (_("Target does not support source download."));
12432 remote_download_command_source (b
->number
, loc
->address
,
12433 breakpoint_commands (b
));
12438 remote_can_download_tracepoint (struct target_ops
*self
)
12440 struct remote_state
*rs
= get_remote_state ();
12441 struct trace_status
*ts
;
12444 /* Don't try to install tracepoints until we've relocated our
12445 symbols, and fetched and merged the target's tracepoint list with
12447 if (rs
->starting_up
)
12450 ts
= current_trace_status ();
12451 status
= remote_get_trace_status (self
, ts
);
12453 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12456 /* If we are in a tracing experiment, but remote stub doesn't support
12457 installing tracepoint in trace, we have to return. */
12458 if (!remote_supports_install_in_trace ())
12466 remote_download_trace_state_variable (struct target_ops
*self
,
12467 struct trace_state_variable
*tsv
)
12469 struct remote_state
*rs
= get_remote_state ();
12472 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12473 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8),
12475 p
= rs
->buf
+ strlen (rs
->buf
);
12476 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
12477 error (_("Trace state variable name too long for tsv definition packet"));
12478 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, strlen (tsv
->name
));
12481 remote_get_noisy_reply ();
12482 if (*rs
->buf
== '\0')
12483 error (_("Target does not support this command."));
12484 if (strcmp (rs
->buf
, "OK") != 0)
12485 error (_("Error on target while downloading trace state variable."));
12489 remote_enable_tracepoint (struct target_ops
*self
,
12490 struct bp_location
*location
)
12492 struct remote_state
*rs
= get_remote_state ();
12495 sprintf_vma (addr_buf
, location
->address
);
12496 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12497 location
->owner
->number
, addr_buf
);
12499 remote_get_noisy_reply ();
12500 if (*rs
->buf
== '\0')
12501 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12502 if (strcmp (rs
->buf
, "OK") != 0)
12503 error (_("Error on target while enabling tracepoint."));
12507 remote_disable_tracepoint (struct target_ops
*self
,
12508 struct bp_location
*location
)
12510 struct remote_state
*rs
= get_remote_state ();
12513 sprintf_vma (addr_buf
, location
->address
);
12514 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12515 location
->owner
->number
, addr_buf
);
12517 remote_get_noisy_reply ();
12518 if (*rs
->buf
== '\0')
12519 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12520 if (strcmp (rs
->buf
, "OK") != 0)
12521 error (_("Error on target while disabling tracepoint."));
12525 remote_trace_set_readonly_regions (struct target_ops
*self
)
12529 bfd_size_type size
;
12535 return; /* No information to give. */
12537 struct remote_state
*rs
= get_remote_state ();
12539 strcpy (rs
->buf
, "QTro");
12540 offset
= strlen (rs
->buf
);
12541 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12543 char tmp1
[40], tmp2
[40];
12546 if ((s
->flags
& SEC_LOAD
) == 0 ||
12547 /* (s->flags & SEC_CODE) == 0 || */
12548 (s
->flags
& SEC_READONLY
) == 0)
12552 vma
= bfd_get_section_vma (abfd
, s
);
12553 size
= bfd_get_section_size (s
);
12554 sprintf_vma (tmp1
, vma
);
12555 sprintf_vma (tmp2
, vma
+ size
);
12556 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12557 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
12559 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12561 Too many sections for read-only sections definition packet."));
12564 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
12566 offset
+= sec_length
;
12571 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12576 remote_trace_start (struct target_ops
*self
)
12578 struct remote_state
*rs
= get_remote_state ();
12580 putpkt ("QTStart");
12581 remote_get_noisy_reply ();
12582 if (*rs
->buf
== '\0')
12583 error (_("Target does not support this command."));
12584 if (strcmp (rs
->buf
, "OK") != 0)
12585 error (_("Bogus reply from target: %s"), rs
->buf
);
12589 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12591 /* Initialize it just to avoid a GCC false warning. */
12593 /* FIXME we need to get register block size some other way. */
12594 extern int trace_regblock_size
;
12595 enum packet_result result
;
12596 struct remote_state
*rs
= get_remote_state ();
12598 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12601 trace_regblock_size
12602 = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
12604 putpkt ("qTStatus");
12608 p
= remote_get_noisy_reply ();
12610 CATCH (ex
, RETURN_MASK_ERROR
)
12612 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12614 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12617 throw_exception (ex
);
12621 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12623 /* If the remote target doesn't do tracing, flag it. */
12624 if (result
== PACKET_UNKNOWN
)
12627 /* We're working with a live target. */
12628 ts
->filename
= NULL
;
12631 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
12633 /* Function 'parse_trace_status' sets default value of each field of
12634 'ts' at first, so we don't have to do it here. */
12635 parse_trace_status (p
, ts
);
12637 return ts
->running
;
12641 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12642 struct uploaded_tp
*utp
)
12644 struct remote_state
*rs
= get_remote_state ();
12646 struct bp_location
*loc
;
12647 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12648 size_t size
= get_remote_packet_size ();
12653 tp
->traceframe_usage
= 0;
12654 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
12656 /* If the tracepoint was never downloaded, don't go asking for
12658 if (tp
->number_on_target
== 0)
12660 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12661 phex_nz (loc
->address
, 0));
12663 reply
= remote_get_noisy_reply ();
12664 if (reply
&& *reply
)
12667 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12673 utp
->hit_count
= 0;
12674 utp
->traceframe_usage
= 0;
12675 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12676 phex_nz (utp
->addr
, 0));
12678 reply
= remote_get_noisy_reply ();
12679 if (reply
&& *reply
)
12682 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12688 remote_trace_stop (struct target_ops
*self
)
12690 struct remote_state
*rs
= get_remote_state ();
12693 remote_get_noisy_reply ();
12694 if (*rs
->buf
== '\0')
12695 error (_("Target does not support this command."));
12696 if (strcmp (rs
->buf
, "OK") != 0)
12697 error (_("Bogus reply from target: %s"), rs
->buf
);
12701 remote_trace_find (struct target_ops
*self
,
12702 enum trace_find_type type
, int num
,
12703 CORE_ADDR addr1
, CORE_ADDR addr2
,
12706 struct remote_state
*rs
= get_remote_state ();
12707 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12709 int target_frameno
= -1, target_tracept
= -1;
12711 /* Lookups other than by absolute frame number depend on the current
12712 trace selected, so make sure it is correct on the remote end
12714 if (type
!= tfind_number
)
12715 set_remote_traceframe ();
12718 strcpy (p
, "QTFrame:");
12719 p
= strchr (p
, '\0');
12723 xsnprintf (p
, endbuf
- p
, "%x", num
);
12726 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12729 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12732 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12733 phex_nz (addr2
, 0));
12735 case tfind_outside
:
12736 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12737 phex_nz (addr2
, 0));
12740 error (_("Unknown trace find type %d"), type
);
12744 reply
= remote_get_noisy_reply ();
12745 if (*reply
== '\0')
12746 error (_("Target does not support this command."));
12748 while (reply
&& *reply
)
12753 target_frameno
= (int) strtol (p
, &reply
, 16);
12755 error (_("Unable to parse trace frame number"));
12756 /* Don't update our remote traceframe number cache on failure
12757 to select a remote traceframe. */
12758 if (target_frameno
== -1)
12763 target_tracept
= (int) strtol (p
, &reply
, 16);
12765 error (_("Unable to parse tracepoint number"));
12767 case 'O': /* "OK"? */
12768 if (reply
[1] == 'K' && reply
[2] == '\0')
12771 error (_("Bogus reply from target: %s"), reply
);
12774 error (_("Bogus reply from target: %s"), reply
);
12777 *tpp
= target_tracept
;
12779 rs
->remote_traceframe_number
= target_frameno
;
12780 return target_frameno
;
12784 remote_get_trace_state_variable_value (struct target_ops
*self
,
12785 int tsvnum
, LONGEST
*val
)
12787 struct remote_state
*rs
= get_remote_state ();
12791 set_remote_traceframe ();
12793 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12795 reply
= remote_get_noisy_reply ();
12796 if (reply
&& *reply
)
12800 unpack_varlen_hex (reply
+ 1, &uval
);
12801 *val
= (LONGEST
) uval
;
12809 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12811 struct remote_state
*rs
= get_remote_state ();
12815 strcpy (p
, "QTSave:");
12817 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12818 error (_("Remote file name too long for trace save packet"));
12819 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12822 reply
= remote_get_noisy_reply ();
12823 if (*reply
== '\0')
12824 error (_("Target does not support this command."));
12825 if (strcmp (reply
, "OK") != 0)
12826 error (_("Bogus reply from target: %s"), reply
);
12830 /* This is basically a memory transfer, but needs to be its own packet
12831 because we don't know how the target actually organizes its trace
12832 memory, plus we want to be able to ask for as much as possible, but
12833 not be unhappy if we don't get as much as we ask for. */
12836 remote_get_raw_trace_data (struct target_ops
*self
,
12837 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12839 struct remote_state
*rs
= get_remote_state ();
12845 strcpy (p
, "qTBuffer:");
12847 p
+= hexnumstr (p
, offset
);
12849 p
+= hexnumstr (p
, len
);
12853 reply
= remote_get_noisy_reply ();
12854 if (reply
&& *reply
)
12856 /* 'l' by itself means we're at the end of the buffer and
12857 there is nothing more to get. */
12861 /* Convert the reply into binary. Limit the number of bytes to
12862 convert according to our passed-in buffer size, rather than
12863 what was returned in the packet; if the target is
12864 unexpectedly generous and gives us a bigger reply than we
12865 asked for, we don't want to crash. */
12866 rslt
= hex2bin (reply
, buf
, len
);
12870 /* Something went wrong, flag as an error. */
12875 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12877 struct remote_state
*rs
= get_remote_state ();
12879 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12883 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12885 reply
= remote_get_noisy_reply ();
12886 if (*reply
== '\0')
12887 error (_("Target does not support this command."));
12888 if (strcmp (reply
, "OK") != 0)
12889 error (_("Bogus reply from target: %s"), reply
);
12892 warning (_("Target does not support disconnected tracing."));
12896 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12898 struct thread_info
*info
= find_thread_ptid (ptid
);
12900 if (info
!= NULL
&& info
->priv
!= NULL
)
12901 return get_remote_thread_info (info
)->core
;
12907 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12909 struct remote_state
*rs
= get_remote_state ();
12912 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12914 reply
= remote_get_noisy_reply ();
12915 if (*reply
== '\0')
12916 error (_("Target does not support this command."));
12917 if (strcmp (reply
, "OK") != 0)
12918 error (_("Bogus reply from target: %s"), reply
);
12921 static traceframe_info_up
12922 remote_traceframe_info (struct target_ops
*self
)
12924 gdb::unique_xmalloc_ptr
<char> text
12925 = target_read_stralloc (¤t_target
, TARGET_OBJECT_TRACEFRAME_INFO
,
12928 return parse_traceframe_info (text
.get ());
12933 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12934 instruction on which a fast tracepoint may be placed. Returns -1
12935 if the packet is not supported, and 0 if the minimum instruction
12936 length is unknown. */
12939 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12941 struct remote_state
*rs
= get_remote_state ();
12944 /* If we're not debugging a process yet, the IPA can't be
12946 if (!target_has_execution
)
12949 /* Make sure the remote is pointing at the right process. */
12950 set_general_process ();
12952 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12954 reply
= remote_get_noisy_reply ();
12955 if (*reply
== '\0')
12959 ULONGEST min_insn_len
;
12961 unpack_varlen_hex (reply
, &min_insn_len
);
12963 return (int) min_insn_len
;
12968 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12970 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12972 struct remote_state
*rs
= get_remote_state ();
12973 char *buf
= rs
->buf
;
12974 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12975 enum packet_result result
;
12977 gdb_assert (val
>= 0 || val
== -1);
12978 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
12979 /* Send -1 as literal "-1" to avoid host size dependency. */
12983 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
12986 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
12989 remote_get_noisy_reply ();
12990 result
= packet_ok (rs
->buf
,
12991 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
12993 if (result
!= PACKET_OK
)
12994 warning (_("Bogus reply from target: %s"), rs
->buf
);
12999 remote_set_trace_notes (struct target_ops
*self
,
13000 const char *user
, const char *notes
,
13001 const char *stop_notes
)
13003 struct remote_state
*rs
= get_remote_state ();
13005 char *buf
= rs
->buf
;
13006 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13009 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13012 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13013 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13019 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13020 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13026 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13027 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13031 /* Ensure the buffer is terminated. */
13035 reply
= remote_get_noisy_reply ();
13036 if (*reply
== '\0')
13039 if (strcmp (reply
, "OK") != 0)
13040 error (_("Bogus reply from target: %s"), reply
);
13046 remote_use_agent (struct target_ops
*self
, int use
)
13048 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13050 struct remote_state
*rs
= get_remote_state ();
13052 /* If the stub supports QAgent. */
13053 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13055 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13057 if (strcmp (rs
->buf
, "OK") == 0)
13068 remote_can_use_agent (struct target_ops
*self
)
13070 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13073 struct btrace_target_info
13075 /* The ptid of the traced thread. */
13078 /* The obtained branch trace configuration. */
13079 struct btrace_config conf
;
13082 /* Reset our idea of our target's btrace configuration. */
13085 remote_btrace_reset (void)
13087 struct remote_state
*rs
= get_remote_state ();
13089 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13092 /* Synchronize the configuration with the target. */
13095 btrace_sync_conf (const struct btrace_config
*conf
)
13097 struct packet_config
*packet
;
13098 struct remote_state
*rs
;
13099 char *buf
, *pos
, *endbuf
;
13101 rs
= get_remote_state ();
13103 endbuf
= buf
+ get_remote_packet_size ();
13105 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13106 if (packet_config_support (packet
) == PACKET_ENABLE
13107 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13110 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13114 getpkt (&buf
, &rs
->buf_size
, 0);
13116 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13118 if (buf
[0] == 'E' && buf
[1] == '.')
13119 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13121 error (_("Failed to configure the BTS buffer size."));
13124 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13127 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13128 if (packet_config_support (packet
) == PACKET_ENABLE
13129 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13132 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13136 getpkt (&buf
, &rs
->buf_size
, 0);
13138 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13140 if (buf
[0] == 'E' && buf
[1] == '.')
13141 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13143 error (_("Failed to configure the trace buffer size."));
13146 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13150 /* Read the current thread's btrace configuration from the target and
13151 store it into CONF. */
13154 btrace_read_config (struct btrace_config
*conf
)
13156 gdb::unique_xmalloc_ptr
<char> xml
13157 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE_CONF
, "");
13159 parse_xml_btrace_conf (conf
, xml
.get ());
13162 /* Maybe reopen target btrace. */
13165 remote_btrace_maybe_reopen (void)
13167 struct remote_state
*rs
= get_remote_state ();
13168 struct thread_info
*tp
;
13169 int btrace_target_pushed
= 0;
13172 scoped_restore_current_thread restore_thread
;
13174 ALL_NON_EXITED_THREADS (tp
)
13176 set_general_thread (tp
->ptid
);
13178 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13179 btrace_read_config (&rs
->btrace_config
);
13181 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13184 #if !defined (HAVE_LIBIPT)
13185 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13190 warning (_("Target is recording using Intel Processor Trace "
13191 "but support was disabled at compile time."));
13196 #endif /* !defined (HAVE_LIBIPT) */
13198 /* Push target, once, but before anything else happens. This way our
13199 changes to the threads will be cleaned up by unpushing the target
13200 in case btrace_read_config () throws. */
13201 if (!btrace_target_pushed
)
13203 btrace_target_pushed
= 1;
13204 record_btrace_push_target ();
13205 printf_filtered (_("Target is recording using %s.\n"),
13206 btrace_format_string (rs
->btrace_config
.format
));
13209 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13210 tp
->btrace
.target
->ptid
= tp
->ptid
;
13211 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13215 /* Enable branch tracing. */
13217 static struct btrace_target_info
*
13218 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13219 const struct btrace_config
*conf
)
13221 struct btrace_target_info
*tinfo
= NULL
;
13222 struct packet_config
*packet
= NULL
;
13223 struct remote_state
*rs
= get_remote_state ();
13224 char *buf
= rs
->buf
;
13225 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13227 switch (conf
->format
)
13229 case BTRACE_FORMAT_BTS
:
13230 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13233 case BTRACE_FORMAT_PT
:
13234 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13238 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13239 error (_("Target does not support branch tracing."));
13241 btrace_sync_conf (conf
);
13243 set_general_thread (ptid
);
13245 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13247 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13249 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13251 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13252 error (_("Could not enable branch tracing for %s: %s"),
13253 target_pid_to_str (ptid
), rs
->buf
+ 2);
13255 error (_("Could not enable branch tracing for %s."),
13256 target_pid_to_str (ptid
));
13259 tinfo
= XCNEW (struct btrace_target_info
);
13260 tinfo
->ptid
= ptid
;
13262 /* If we fail to read the configuration, we lose some information, but the
13263 tracing itself is not impacted. */
13266 btrace_read_config (&tinfo
->conf
);
13268 CATCH (err
, RETURN_MASK_ERROR
)
13270 if (err
.message
!= NULL
)
13271 warning ("%s", err
.message
);
13278 /* Disable branch tracing. */
13281 remote_disable_btrace (struct target_ops
*self
,
13282 struct btrace_target_info
*tinfo
)
13284 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13285 struct remote_state
*rs
= get_remote_state ();
13286 char *buf
= rs
->buf
;
13287 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13289 if (packet_config_support (packet
) != PACKET_ENABLE
)
13290 error (_("Target does not support branch tracing."));
13292 set_general_thread (tinfo
->ptid
);
13294 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13296 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13298 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13300 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13301 error (_("Could not disable branch tracing for %s: %s"),
13302 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13304 error (_("Could not disable branch tracing for %s."),
13305 target_pid_to_str (tinfo
->ptid
));
13311 /* Teardown branch tracing. */
13314 remote_teardown_btrace (struct target_ops
*self
,
13315 struct btrace_target_info
*tinfo
)
13317 /* We must not talk to the target during teardown. */
13321 /* Read the branch trace. */
13323 static enum btrace_error
13324 remote_read_btrace (struct target_ops
*self
,
13325 struct btrace_data
*btrace
,
13326 struct btrace_target_info
*tinfo
,
13327 enum btrace_read_type type
)
13329 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13332 if (packet_config_support (packet
) != PACKET_ENABLE
)
13333 error (_("Target does not support branch tracing."));
13335 #if !defined(HAVE_LIBEXPAT)
13336 error (_("Cannot process branch tracing result. XML parsing not supported."));
13341 case BTRACE_READ_ALL
:
13344 case BTRACE_READ_NEW
:
13347 case BTRACE_READ_DELTA
:
13351 internal_error (__FILE__
, __LINE__
,
13352 _("Bad branch tracing read type: %u."),
13353 (unsigned int) type
);
13356 gdb::unique_xmalloc_ptr
<char> xml
13357 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE
, annex
);
13359 return BTRACE_ERR_UNKNOWN
;
13361 parse_xml_btrace (btrace
, xml
.get ());
13363 return BTRACE_ERR_NONE
;
13366 static const struct btrace_config
*
13367 remote_btrace_conf (struct target_ops
*self
,
13368 const struct btrace_target_info
*tinfo
)
13370 return &tinfo
->conf
;
13374 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13376 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13380 /* Implementation of to_load. */
13383 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13385 generic_load (name
, from_tty
);
13388 /* Accepts an integer PID; returns a string representing a file that
13389 can be opened on the remote side to get the symbols for the child
13390 process. Returns NULL if the operation is not supported. */
13393 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13395 static gdb::unique_xmalloc_ptr
<char> filename
;
13396 struct inferior
*inf
;
13397 char *annex
= NULL
;
13399 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13402 inf
= find_inferior_pid (pid
);
13404 internal_error (__FILE__
, __LINE__
,
13405 _("not currently attached to process %d"), pid
);
13407 if (!inf
->fake_pid_p
)
13409 const int annex_size
= 9;
13411 annex
= (char *) alloca (annex_size
);
13412 xsnprintf (annex
, annex_size
, "%x", pid
);
13415 filename
= target_read_stralloc (¤t_target
,
13416 TARGET_OBJECT_EXEC_FILE
, annex
);
13418 return filename
.get ();
13421 /* Implement the to_can_do_single_step target_ops method. */
13424 remote_can_do_single_step (struct target_ops
*ops
)
13426 /* We can only tell whether target supports single step or not by
13427 supported s and S vCont actions if the stub supports vContSupported
13428 feature. If the stub doesn't support vContSupported feature,
13429 we have conservatively to think target doesn't supports single
13431 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13433 struct remote_state
*rs
= get_remote_state ();
13435 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13436 remote_vcont_probe (rs
);
13438 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13444 /* Implementation of the to_execution_direction method for the remote
13447 static enum exec_direction_kind
13448 remote_execution_direction (struct target_ops
*self
)
13450 struct remote_state
*rs
= get_remote_state ();
13452 return rs
->last_resume_exec_dir
;
13455 /* Return pointer to the thread_info struct which corresponds to
13456 THREAD_HANDLE (having length HANDLE_LEN). */
13458 static struct thread_info
*
13459 remote_thread_handle_to_thread_info (struct target_ops
*ops
,
13460 const gdb_byte
*thread_handle
,
13462 struct inferior
*inf
)
13464 struct thread_info
*tp
;
13466 ALL_NON_EXITED_THREADS (tp
)
13468 remote_thread_info
*priv
= get_remote_thread_info (tp
);
13470 if (tp
->inf
== inf
&& priv
!= NULL
)
13472 if (handle_len
!= priv
->thread_handle
.size ())
13473 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13474 handle_len
, priv
->thread_handle
.size ());
13475 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
13485 init_remote_ops (void)
13487 remote_ops
.to_shortname
= "remote";
13488 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13489 remote_ops
.to_doc
=
13490 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13491 Specify the serial device it is connected to\n\
13492 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13493 remote_ops
.to_open
= remote_open
;
13494 remote_ops
.to_close
= remote_close
;
13495 remote_ops
.to_detach
= remote_detach
;
13496 remote_ops
.to_disconnect
= remote_disconnect
;
13497 remote_ops
.to_resume
= remote_resume
;
13498 remote_ops
.to_commit_resume
= remote_commit_resume
;
13499 remote_ops
.to_wait
= remote_wait
;
13500 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13501 remote_ops
.to_store_registers
= remote_store_registers
;
13502 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13503 remote_ops
.to_files_info
= remote_files_info
;
13504 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13505 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13506 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13507 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13508 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13509 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13510 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13511 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13512 remote_ops
.to_watchpoint_addr_within_range
=
13513 remote_watchpoint_addr_within_range
;
13514 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13515 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13516 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13517 remote_ops
.to_region_ok_for_hw_watchpoint
13518 = remote_region_ok_for_hw_watchpoint
;
13519 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13520 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13521 remote_ops
.to_kill
= remote_kill
;
13522 remote_ops
.to_load
= remote_load
;
13523 remote_ops
.to_mourn_inferior
= remote_mourn
;
13524 remote_ops
.to_pass_signals
= remote_pass_signals
;
13525 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13526 remote_ops
.to_program_signals
= remote_program_signals
;
13527 remote_ops
.to_thread_alive
= remote_thread_alive
;
13528 remote_ops
.to_thread_name
= remote_thread_name
;
13529 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13530 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13531 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13532 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13533 remote_ops
.to_stop
= remote_stop
;
13534 remote_ops
.to_interrupt
= remote_interrupt
;
13535 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13536 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13537 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13538 remote_ops
.to_rcmd
= remote_rcmd
;
13539 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13540 remote_ops
.to_log_command
= serial_log_command
;
13541 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13542 remote_ops
.to_stratum
= process_stratum
;
13543 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13544 remote_ops
.to_has_memory
= default_child_has_memory
;
13545 remote_ops
.to_has_stack
= default_child_has_stack
;
13546 remote_ops
.to_has_registers
= default_child_has_registers
;
13547 remote_ops
.to_has_execution
= default_child_has_execution
;
13548 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13549 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13550 remote_ops
.to_magic
= OPS_MAGIC
;
13551 remote_ops
.to_memory_map
= remote_memory_map
;
13552 remote_ops
.to_flash_erase
= remote_flash_erase
;
13553 remote_ops
.to_flash_done
= remote_flash_done
;
13554 remote_ops
.to_read_description
= remote_read_description
;
13555 remote_ops
.to_search_memory
= remote_search_memory
;
13556 remote_ops
.to_can_async_p
= remote_can_async_p
;
13557 remote_ops
.to_is_async_p
= remote_is_async_p
;
13558 remote_ops
.to_async
= remote_async
;
13559 remote_ops
.to_thread_events
= remote_thread_events
;
13560 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13561 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13562 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13563 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13564 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13565 remote_ops
.to_supports_disable_randomization
13566 = remote_supports_disable_randomization
;
13567 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13568 remote_ops
.to_fileio_open
= remote_hostio_open
;
13569 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13570 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13571 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13572 remote_ops
.to_fileio_close
= remote_hostio_close
;
13573 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13574 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13575 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13576 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13577 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13578 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13579 remote_ops
.to_trace_init
= remote_trace_init
;
13580 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13581 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13582 remote_ops
.to_download_trace_state_variable
13583 = remote_download_trace_state_variable
;
13584 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13585 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13586 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13587 remote_ops
.to_trace_start
= remote_trace_start
;
13588 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13589 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13590 remote_ops
.to_trace_stop
= remote_trace_stop
;
13591 remote_ops
.to_trace_find
= remote_trace_find
;
13592 remote_ops
.to_get_trace_state_variable_value
13593 = remote_get_trace_state_variable_value
;
13594 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13595 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13596 remote_ops
.to_upload_trace_state_variables
13597 = remote_upload_trace_state_variables
;
13598 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13599 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13600 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13601 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13602 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13603 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13604 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13605 remote_ops
.to_verify_memory
= remote_verify_memory
;
13606 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13607 remote_ops
.to_set_permissions
= remote_set_permissions
;
13608 remote_ops
.to_static_tracepoint_marker_at
13609 = remote_static_tracepoint_marker_at
;
13610 remote_ops
.to_static_tracepoint_markers_by_strid
13611 = remote_static_tracepoint_markers_by_strid
;
13612 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13613 remote_ops
.to_use_agent
= remote_use_agent
;
13614 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13615 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13616 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13617 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13618 remote_ops
.to_read_btrace
= remote_read_btrace
;
13619 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13620 remote_ops
.to_augmented_libraries_svr4_read
=
13621 remote_augmented_libraries_svr4_read
;
13622 remote_ops
.to_follow_fork
= remote_follow_fork
;
13623 remote_ops
.to_follow_exec
= remote_follow_exec
;
13624 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13625 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13626 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13627 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13628 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13629 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13630 remote_ops
.to_execution_direction
= remote_execution_direction
;
13631 remote_ops
.to_thread_handle_to_thread_info
=
13632 remote_thread_handle_to_thread_info
;
13635 /* Set up the extended remote vector by making a copy of the standard
13636 remote vector and adding to it. */
13639 init_extended_remote_ops (void)
13641 extended_remote_ops
= remote_ops
;
13643 extended_remote_ops
.to_shortname
= "extended-remote";
13644 extended_remote_ops
.to_longname
=
13645 "Extended remote serial target in gdb-specific protocol";
13646 extended_remote_ops
.to_doc
=
13647 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13648 Specify the serial device it is connected to (e.g. /dev/ttya).";
13649 extended_remote_ops
.to_open
= extended_remote_open
;
13650 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13651 extended_remote_ops
.to_detach
= extended_remote_detach
;
13652 extended_remote_ops
.to_attach
= extended_remote_attach
;
13653 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13654 extended_remote_ops
.to_supports_disable_randomization
13655 = extended_remote_supports_disable_randomization
;
13659 remote_can_async_p (struct target_ops
*ops
)
13661 struct remote_state
*rs
= get_remote_state ();
13663 /* We don't go async if the user has explicitly prevented it with the
13664 "maint set target-async" command. */
13665 if (!target_async_permitted
)
13668 /* We're async whenever the serial device is. */
13669 return serial_can_async_p (rs
->remote_desc
);
13673 remote_is_async_p (struct target_ops
*ops
)
13675 struct remote_state
*rs
= get_remote_state ();
13677 if (!target_async_permitted
)
13678 /* We only enable async when the user specifically asks for it. */
13681 /* We're async whenever the serial device is. */
13682 return serial_is_async_p (rs
->remote_desc
);
13685 /* Pass the SERIAL event on and up to the client. One day this code
13686 will be able to delay notifying the client of an event until the
13687 point where an entire packet has been received. */
13689 static serial_event_ftype remote_async_serial_handler
;
13692 remote_async_serial_handler (struct serial
*scb
, void *context
)
13694 /* Don't propogate error information up to the client. Instead let
13695 the client find out about the error by querying the target. */
13696 inferior_event_handler (INF_REG_EVENT
, NULL
);
13700 remote_async_inferior_event_handler (gdb_client_data data
)
13702 inferior_event_handler (INF_REG_EVENT
, NULL
);
13706 remote_async (struct target_ops
*ops
, int enable
)
13708 struct remote_state
*rs
= get_remote_state ();
13712 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13714 /* If there are pending events in the stop reply queue tell the
13715 event loop to process them. */
13716 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13717 mark_async_event_handler (remote_async_inferior_event_token
);
13718 /* For simplicity, below we clear the pending events token
13719 without remembering whether it is marked, so here we always
13720 mark it. If there's actually no pending notification to
13721 process, this ends up being a no-op (other than a spurious
13722 event-loop wakeup). */
13723 if (target_is_non_stop_p ())
13724 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13728 serial_async (rs
->remote_desc
, NULL
, NULL
);
13729 /* If the core is disabling async, it doesn't want to be
13730 disturbed with target events. Clear all async event sources
13732 clear_async_event_handler (remote_async_inferior_event_token
);
13733 if (target_is_non_stop_p ())
13734 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13738 /* Implementation of the to_thread_events method. */
13741 remote_thread_events (struct target_ops
*ops
, int enable
)
13743 struct remote_state
*rs
= get_remote_state ();
13744 size_t size
= get_remote_packet_size ();
13746 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13749 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13751 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13753 switch (packet_ok (rs
->buf
,
13754 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13757 if (strcmp (rs
->buf
, "OK") != 0)
13758 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13761 warning (_("Remote failure reply: %s"), rs
->buf
);
13763 case PACKET_UNKNOWN
:
13769 set_remote_cmd (const char *args
, int from_tty
)
13771 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13775 show_remote_cmd (const char *args
, int from_tty
)
13777 /* We can't just use cmd_show_list here, because we want to skip
13778 the redundant "show remote Z-packet" and the legacy aliases. */
13779 struct cmd_list_element
*list
= remote_show_cmdlist
;
13780 struct ui_out
*uiout
= current_uiout
;
13782 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
13783 for (; list
!= NULL
; list
= list
->next
)
13784 if (strcmp (list
->name
, "Z-packet") == 0)
13786 else if (list
->type
== not_set_cmd
)
13787 /* Alias commands are exactly like the original, except they
13788 don't have the normal type. */
13792 ui_out_emit_tuple
option_emitter (uiout
, "option");
13794 uiout
->field_string ("name", list
->name
);
13795 uiout
->text (": ");
13796 if (list
->type
== show_cmd
)
13797 do_show_command (NULL
, from_tty
, list
);
13799 cmd_func (list
, NULL
, from_tty
);
13804 /* Function to be called whenever a new objfile (shlib) is detected. */
13806 remote_new_objfile (struct objfile
*objfile
)
13808 struct remote_state
*rs
= get_remote_state ();
13810 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13811 remote_check_symbols ();
13814 /* Pull all the tracepoints defined on the target and create local
13815 data structures representing them. We don't want to create real
13816 tracepoints yet, we don't want to mess up the user's existing
13820 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13822 struct remote_state
*rs
= get_remote_state ();
13825 /* Ask for a first packet of tracepoint definition. */
13827 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13829 while (*p
&& *p
!= 'l')
13831 parse_tracepoint_definition (p
, utpp
);
13832 /* Ask for another packet of tracepoint definition. */
13834 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13841 remote_upload_trace_state_variables (struct target_ops
*self
,
13842 struct uploaded_tsv
**utsvp
)
13844 struct remote_state
*rs
= get_remote_state ();
13847 /* Ask for a first packet of variable definition. */
13849 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13851 while (*p
&& *p
!= 'l')
13853 parse_tsv_definition (p
, utsvp
);
13854 /* Ask for another packet of variable definition. */
13856 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13862 /* The "set/show range-stepping" show hook. */
13865 show_range_stepping (struct ui_file
*file
, int from_tty
,
13866 struct cmd_list_element
*c
,
13869 fprintf_filtered (file
,
13870 _("Debugger's willingness to use range stepping "
13871 "is %s.\n"), value
);
13874 /* The "set/show range-stepping" set hook. */
13877 set_range_stepping (const char *ignore_args
, int from_tty
,
13878 struct cmd_list_element
*c
)
13880 struct remote_state
*rs
= get_remote_state ();
13882 /* Whene enabling, check whether range stepping is actually
13883 supported by the target, and warn if not. */
13884 if (use_range_stepping
)
13886 if (rs
->remote_desc
!= NULL
)
13888 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13889 remote_vcont_probe (rs
);
13891 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13892 && rs
->supports_vCont
.r
)
13896 warning (_("Range stepping is not supported by the current target"));
13901 _initialize_remote (void)
13903 struct cmd_list_element
*cmd
;
13904 const char *cmd_name
;
13906 /* architecture specific data */
13907 remote_gdbarch_data_handle
=
13908 gdbarch_data_register_post_init (init_remote_state
);
13909 remote_g_packet_data_handle
=
13910 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13913 = register_program_space_data_with_cleanup (NULL
,
13914 remote_pspace_data_cleanup
);
13916 /* Initialize the per-target state. At the moment there is only one
13917 of these, not one per target. Only one target is active at a
13919 remote_state
= new_remote_state ();
13921 init_remote_ops ();
13922 add_target (&remote_ops
);
13924 init_extended_remote_ops ();
13925 add_target (&extended_remote_ops
);
13927 /* Hook into new objfile notification. */
13928 gdb::observers::new_objfile
.attach (remote_new_objfile
);
13929 /* We're no longer interested in notification events of an inferior
13931 gdb::observers::inferior_exit
.attach (discard_pending_stop_replies
);
13934 init_remote_threadtests ();
13937 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13938 /* set/show remote ... */
13940 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13941 Remote protocol specific variables\n\
13942 Configure various remote-protocol specific variables such as\n\
13943 the packets being used"),
13944 &remote_set_cmdlist
, "set remote ",
13945 0 /* allow-unknown */, &setlist
);
13946 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
13947 Remote protocol specific variables\n\
13948 Configure various remote-protocol specific variables such as\n\
13949 the packets being used"),
13950 &remote_show_cmdlist
, "show remote ",
13951 0 /* allow-unknown */, &showlist
);
13953 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
13954 Compare section data on target to the exec file.\n\
13955 Argument is a single section name (default: all loaded sections).\n\
13956 To compare only read-only loaded sections, specify the -r option."),
13959 add_cmd ("packet", class_maintenance
, packet_command
, _("\
13960 Send an arbitrary packet to a remote target.\n\
13961 maintenance packet TEXT\n\
13962 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13963 this command sends the string TEXT to the inferior, and displays the\n\
13964 response packet. GDB supplies the initial `$' character, and the\n\
13965 terminating `#' character and checksum."),
13968 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
13969 Set whether to send break if interrupted."), _("\
13970 Show whether to send break if interrupted."), _("\
13971 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13972 set_remotebreak
, show_remotebreak
,
13973 &setlist
, &showlist
);
13974 cmd_name
= "remotebreak";
13975 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
13976 deprecate_cmd (cmd
, "set remote interrupt-sequence");
13977 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
13978 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
13979 deprecate_cmd (cmd
, "show remote interrupt-sequence");
13981 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
13982 interrupt_sequence_modes
, &interrupt_sequence_mode
,
13984 Set interrupt sequence to remote target."), _("\
13985 Show interrupt sequence to remote target."), _("\
13986 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
13987 NULL
, show_interrupt_sequence
,
13988 &remote_set_cmdlist
,
13989 &remote_show_cmdlist
);
13991 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
13992 &interrupt_on_connect
, _("\
13993 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13994 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13995 If set, interrupt sequence is sent to remote target."),
13997 &remote_set_cmdlist
, &remote_show_cmdlist
);
13999 /* Install commands for configuring memory read/write packets. */
14001 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14002 Set the maximum number of bytes per memory write packet (deprecated)."),
14004 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14005 Show the maximum number of bytes per memory write packet (deprecated)."),
14007 add_cmd ("memory-write-packet-size", no_class
,
14008 set_memory_write_packet_size
, _("\
14009 Set the maximum number of bytes per memory-write packet.\n\
14010 Specify the number of bytes in a packet or 0 (zero) for the\n\
14011 default packet size. The actual limit is further reduced\n\
14012 dependent on the target. Specify ``fixed'' to disable the\n\
14013 further restriction and ``limit'' to enable that restriction."),
14014 &remote_set_cmdlist
);
14015 add_cmd ("memory-read-packet-size", no_class
,
14016 set_memory_read_packet_size
, _("\
14017 Set the maximum number of bytes per memory-read packet.\n\
14018 Specify the number of bytes in a packet or 0 (zero) for the\n\
14019 default packet size. The actual limit is further reduced\n\
14020 dependent on the target. Specify ``fixed'' to disable the\n\
14021 further restriction and ``limit'' to enable that restriction."),
14022 &remote_set_cmdlist
);
14023 add_cmd ("memory-write-packet-size", no_class
,
14024 show_memory_write_packet_size
,
14025 _("Show the maximum number of bytes per memory-write packet."),
14026 &remote_show_cmdlist
);
14027 add_cmd ("memory-read-packet-size", no_class
,
14028 show_memory_read_packet_size
,
14029 _("Show the maximum number of bytes per memory-read packet."),
14030 &remote_show_cmdlist
);
14032 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14033 &remote_hw_watchpoint_limit
, _("\
14034 Set the maximum number of target hardware watchpoints."), _("\
14035 Show the maximum number of target hardware watchpoints."), _("\
14036 Specify a negative limit for unlimited."),
14037 NULL
, NULL
, /* FIXME: i18n: The maximum
14038 number of target hardware
14039 watchpoints is %s. */
14040 &remote_set_cmdlist
, &remote_show_cmdlist
);
14041 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14042 &remote_hw_watchpoint_length_limit
, _("\
14043 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14044 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14045 Specify a negative limit for unlimited."),
14046 NULL
, NULL
, /* FIXME: i18n: The maximum
14047 length (in bytes) of a target
14048 hardware watchpoint is %s. */
14049 &remote_set_cmdlist
, &remote_show_cmdlist
);
14050 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14051 &remote_hw_breakpoint_limit
, _("\
14052 Set the maximum number of target hardware breakpoints."), _("\
14053 Show the maximum number of target hardware breakpoints."), _("\
14054 Specify a negative limit for unlimited."),
14055 NULL
, NULL
, /* FIXME: i18n: The maximum
14056 number of target hardware
14057 breakpoints is %s. */
14058 &remote_set_cmdlist
, &remote_show_cmdlist
);
14060 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14061 &remote_address_size
, _("\
14062 Set the maximum size of the address (in bits) in a memory packet."), _("\
14063 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14065 NULL
, /* FIXME: i18n: */
14066 &setlist
, &showlist
);
14068 init_all_packet_configs ();
14070 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14071 "X", "binary-download", 1);
14073 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14074 "vCont", "verbose-resume", 0);
14076 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14077 "QPassSignals", "pass-signals", 0);
14079 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14080 "QCatchSyscalls", "catch-syscalls", 0);
14082 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14083 "QProgramSignals", "program-signals", 0);
14085 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14086 "QSetWorkingDir", "set-working-dir", 0);
14088 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14089 "QStartupWithShell", "startup-with-shell", 0);
14091 add_packet_config_cmd (&remote_protocol_packets
14092 [PACKET_QEnvironmentHexEncoded
],
14093 "QEnvironmentHexEncoded", "environment-hex-encoded",
14096 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14097 "QEnvironmentReset", "environment-reset",
14100 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14101 "QEnvironmentUnset", "environment-unset",
14104 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14105 "qSymbol", "symbol-lookup", 0);
14107 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14108 "P", "set-register", 1);
14110 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14111 "p", "fetch-register", 1);
14113 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14114 "Z0", "software-breakpoint", 0);
14116 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14117 "Z1", "hardware-breakpoint", 0);
14119 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14120 "Z2", "write-watchpoint", 0);
14122 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14123 "Z3", "read-watchpoint", 0);
14125 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14126 "Z4", "access-watchpoint", 0);
14128 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14129 "qXfer:auxv:read", "read-aux-vector", 0);
14131 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14132 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14134 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14135 "qXfer:features:read", "target-features", 0);
14137 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14138 "qXfer:libraries:read", "library-info", 0);
14140 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14141 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14143 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14144 "qXfer:memory-map:read", "memory-map", 0);
14146 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14147 "qXfer:spu:read", "read-spu-object", 0);
14149 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14150 "qXfer:spu:write", "write-spu-object", 0);
14152 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14153 "qXfer:osdata:read", "osdata", 0);
14155 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14156 "qXfer:threads:read", "threads", 0);
14158 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14159 "qXfer:siginfo:read", "read-siginfo-object", 0);
14161 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14162 "qXfer:siginfo:write", "write-siginfo-object", 0);
14164 add_packet_config_cmd
14165 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14166 "qXfer:traceframe-info:read", "traceframe-info", 0);
14168 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14169 "qXfer:uib:read", "unwind-info-block", 0);
14171 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14172 "qGetTLSAddr", "get-thread-local-storage-address",
14175 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14176 "qGetTIBAddr", "get-thread-information-block-address",
14179 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14180 "bc", "reverse-continue", 0);
14182 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14183 "bs", "reverse-step", 0);
14185 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14186 "qSupported", "supported-packets", 0);
14188 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14189 "qSearch:memory", "search-memory", 0);
14191 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14192 "qTStatus", "trace-status", 0);
14194 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14195 "vFile:setfs", "hostio-setfs", 0);
14197 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14198 "vFile:open", "hostio-open", 0);
14200 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14201 "vFile:pread", "hostio-pread", 0);
14203 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14204 "vFile:pwrite", "hostio-pwrite", 0);
14206 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14207 "vFile:close", "hostio-close", 0);
14209 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14210 "vFile:unlink", "hostio-unlink", 0);
14212 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14213 "vFile:readlink", "hostio-readlink", 0);
14215 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14216 "vFile:fstat", "hostio-fstat", 0);
14218 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14219 "vAttach", "attach", 0);
14221 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14224 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14225 "QStartNoAckMode", "noack", 0);
14227 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14228 "vKill", "kill", 0);
14230 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14231 "qAttached", "query-attached", 0);
14233 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14234 "ConditionalTracepoints",
14235 "conditional-tracepoints", 0);
14237 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14238 "ConditionalBreakpoints",
14239 "conditional-breakpoints", 0);
14241 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14242 "BreakpointCommands",
14243 "breakpoint-commands", 0);
14245 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14246 "FastTracepoints", "fast-tracepoints", 0);
14248 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14249 "TracepointSource", "TracepointSource", 0);
14251 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14252 "QAllow", "allow", 0);
14254 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14255 "StaticTracepoints", "static-tracepoints", 0);
14257 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14258 "InstallInTrace", "install-in-trace", 0);
14260 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14261 "qXfer:statictrace:read", "read-sdata-object", 0);
14263 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14264 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14266 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14267 "QDisableRandomization", "disable-randomization", 0);
14269 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14270 "QAgent", "agent", 0);
14272 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14273 "QTBuffer:size", "trace-buffer-size", 0);
14275 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14276 "Qbtrace:off", "disable-btrace", 0);
14278 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14279 "Qbtrace:bts", "enable-btrace-bts", 0);
14281 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14282 "Qbtrace:pt", "enable-btrace-pt", 0);
14284 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14285 "qXfer:btrace", "read-btrace", 0);
14287 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14288 "qXfer:btrace-conf", "read-btrace-conf", 0);
14290 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14291 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14293 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14294 "multiprocess-feature", "multiprocess-feature", 0);
14296 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14297 "swbreak-feature", "swbreak-feature", 0);
14299 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14300 "hwbreak-feature", "hwbreak-feature", 0);
14302 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14303 "fork-event-feature", "fork-event-feature", 0);
14305 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14306 "vfork-event-feature", "vfork-event-feature", 0);
14308 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14309 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14311 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14312 "vContSupported", "verbose-resume-supported", 0);
14314 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14315 "exec-event-feature", "exec-event-feature", 0);
14317 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14318 "vCtrlC", "ctrl-c", 0);
14320 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14321 "QThreadEvents", "thread-events", 0);
14323 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14324 "N stop reply", "no-resumed-stop-reply", 0);
14326 /* Assert that we've registered "set remote foo-packet" commands
14327 for all packet configs. */
14331 for (i
= 0; i
< PACKET_MAX
; i
++)
14333 /* Ideally all configs would have a command associated. Some
14334 still don't though. */
14339 case PACKET_QNonStop
:
14340 case PACKET_EnableDisableTracepoints_feature
:
14341 case PACKET_tracenz_feature
:
14342 case PACKET_DisconnectedTracing_feature
:
14343 case PACKET_augmented_libraries_svr4_read_feature
:
14345 /* Additions to this list need to be well justified:
14346 pre-existing packets are OK; new packets are not. */
14354 /* This catches both forgetting to add a config command, and
14355 forgetting to remove a packet from the exception list. */
14356 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14360 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14361 Z sub-packet has its own set and show commands, but users may
14362 have sets to this variable in their .gdbinit files (or in their
14364 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14365 &remote_Z_packet_detect
, _("\
14366 Set use of remote protocol `Z' packets"), _("\
14367 Show use of remote protocol `Z' packets "), _("\
14368 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14370 set_remote_protocol_Z_packet_cmd
,
14371 show_remote_protocol_Z_packet_cmd
,
14372 /* FIXME: i18n: Use of remote protocol
14373 `Z' packets is %s. */
14374 &remote_set_cmdlist
, &remote_show_cmdlist
);
14376 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14377 Manipulate files on the remote system\n\
14378 Transfer files to and from the remote target system."),
14379 &remote_cmdlist
, "remote ",
14380 0 /* allow-unknown */, &cmdlist
);
14382 add_cmd ("put", class_files
, remote_put_command
,
14383 _("Copy a local file to the remote system."),
14386 add_cmd ("get", class_files
, remote_get_command
,
14387 _("Copy a remote file to the local system."),
14390 add_cmd ("delete", class_files
, remote_delete_command
,
14391 _("Delete a remote file."),
14394 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14395 &remote_exec_file_var
, _("\
14396 Set the remote pathname for \"run\""), _("\
14397 Show the remote pathname for \"run\""), NULL
,
14398 set_remote_exec_file
,
14399 show_remote_exec_file
,
14400 &remote_set_cmdlist
,
14401 &remote_show_cmdlist
);
14403 add_setshow_boolean_cmd ("range-stepping", class_run
,
14404 &use_range_stepping
, _("\
14405 Enable or disable range stepping."), _("\
14406 Show whether target-assisted range stepping is enabled."), _("\
14407 If on, and the target supports it, when stepping a source line, GDB\n\
14408 tells the target to step the corresponding range of addresses itself instead\n\
14409 of issuing multiple single-steps. This speeds up source level\n\
14410 stepping. If off, GDB always issues single-steps, even if range\n\
14411 stepping is supported by the target. The default is on."),
14412 set_range_stepping
,
14413 show_range_stepping
,
14417 /* Eventually initialize fileio. See fileio.c */
14418 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14420 /* Take advantage of the fact that the TID field is not used, to tag
14421 special ptids with it set to != 0. */
14422 magic_null_ptid
= ptid_build (42000, -1, 1);
14423 not_sent_ptid
= ptid_build (42000, -2, 1);
14424 any_thread_ptid
= ptid_build (42000, 0, 1);